JP3730035B2 - Nuts with caps for civil engineering anchors and attachment devices for civil engineering anchors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a nut with a cap applied to a long civil engineering anchor such as a lock bolt used for stabilizing a slope, and a mounting apparatus for the civil engineering anchor, and more particularly, to a head of a long civil engineering anchor. It is related with the nut with a cap for anchors which can carry out the rust prevention with respect to the connection part, and an anchor attachment apparatus.
[0002]
[Prior art]
As anchors for civil engineering , so-called ground anchors, lock bolts, and the like, which are made of PC steel wires, PC steel strands, deformed PC steel bars, etc. for transmitting a tensile force, are widely known .
[0003]
As a rust prevention technique relating to the connection portion of this type of anchor with the head, there is one disclosed in, for example, JP-A-9-195272. In this structure, a cylindrical auxiliary sheath that protects the upper part of the anchor is formed, the head side of the auxiliary sheath is inserted into an insertion hole formed in the bearing plate, and the upper end portion is projected from the surface of the bearing plate. The upper end of the anchor is pressed through the anchor fixing tool, and the cap is screwed onto the fixing portion to cover the head of the anchor, and a rust inhibitor is stored in the cap.
[0004]
[Problems to be solved by the invention]
By the way, in what is described in Japanese Patent Application Laid-Open No. 9-195272, the anchor fixing component and the head antirust component are assembled as separate components, so that the assembly is complicated and the antirust cap is a fixing component. Therefore, the cap has a large internal capacity and a large amount of rust preventive is required.
[0005]
In addition, since the cap covering the anchor head is large, when embedded in the bearing plate, the cross section of the concrete is sharply cut and the cross sectional defect becomes large. It was an economy.
[0006]
The present invention has been made in view of the above points, and it is easy to assemble by integrating the fixing part and the cap part for rust prevention, and also the capacity of the cap for rust prevention can be reduced. It is an object to provide a nut with a cap for an anchor and a mounting device for the anchor.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, the present invention is configured as follows.
[0008]
First aspect of the present invention, the head of the anchor and the cap portion of the inner diameter slightly larger than the anchor diameter for retaining rust agent for civil engineering anchors the head within acceptable long such lock bolt A nut with a cap for civil engineering anchors is adopted, in which a nut portion to be screwed is integrally formed, and a cap bolt is screwed into a hole formed in the cap portion.
[0009]
According to the first aspect of the present invention, a cap portion having an inner diameter slightly larger than an anchor diameter capable of receiving a long civil engineering anchor head such as a lock bolt and storing an antirust agent therein, and an anchor head By integrally forming the nut part to be screwed onto the fixing part, the fixing part and the cap part for rust prevention can be integrated, and assembly is easy, and the internal capacity of the cap for rust prevention can be reduced. It is.
[0010]
According to a second aspect of the invention, a civil engineering anchors long rock bolt or the like is inserted into an insertion hole formed in the supporting plate is protruded the head side of the surface of the bearing capacity plate, on the bearing capacity plate A washer mounted via a washer, a cap portion having an inner diameter slightly larger than an anchor diameter capable of receiving the head portion of the anchor and storing a rust preventive agent therein, and a nut portion screwed to the head portion of the anchor A nut with an anchor cap integrally formed, and the nut with an anchor cap is screwed to the head of the anchor to fix the nut portion to the washer. The civil engineering anchor mounting device is adopted .
[0011]
According to the second aspect of the present invention, the nut with the cap for the anchor is screwed to the head of the anchor to fix the nut portion to the washer, and the nut with the cap for the anchor has the cap portion and the nut. Since the parts are integrally formed, the number of parts is small and assembly is easy. Further, the nut with cap for the anchor is economical because the cap portion has an inner volume slightly larger than the diameter of the anchor head, so that the amount of the anticorrosive agent is reduced as compared with the conventional case.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an anchor cap nut and an anchor attachment device according to the present invention will be described below in detail with reference to the drawings.
[0013]
First, the anchor mounting apparatus shown in FIGS. 1 to 3 will be described. FIG. 1 is a cross-sectional view of a case where a lock bolt made of a deformed PC steel rod in the form of a fully threaded bolt is adopted as an anchor as an embodiment of the present invention and applied to an anchor of a type covered with a sheath, and FIG. 3 is an enlarged view of the mounting device, FIG. 3 shows a nut with an anchor cap, FIG. 3 (a) is a sectional view, FIG. 3 (b) is a front view, and FIG. 3 (c) is a left side view of FIG. 3 (d) is a right side view of FIG. 3 (b).
[0014]
In the figure, reference numeral 1 denotes an anchor, which uses a lock bolt made of a deformed PC steel rod in the form of an all-screw bolt and is covered with a sheath 3. The anchor 1 and the sheath 3 are inserted into a drilling hole 5 formed in the ground 4 such as a slope, and the anchor 1 is fixed to the ground 4 by a grout material 6 injected into the inside and outside of the sheath 3.
[0015]
The anchor 1 of this embodiment is inserted through an insertion hole 7 a formed in the bearing plate 7 so that the head 1 a side protrudes from the surface of the bearing plate 7. A washer 9 is placed on the bearing plate 7 via a washer 8, and this washer 9 has a concave spherical portion 9b around the insertion hole 9a. A nut 10 with an anchor cap is screwed onto the head 1 a of the anchor 1.
[0016]
The nut 10 with a cap for an anchor is integrally formed with a cap portion 10a that is filled with rust-preventing oil as a rust preventive agent and stored, and a nut portion 10b that is screwed to the head portion 1a of the anchor 1. The cap portion 10a has a bag-like space for containing a rust preventive agent, and a hole 10a1 for discharging air or discharging excess oil is formed at a tip portion which is a part of the bag portion. The stopper bolt 12 is screwed to 10a1. The number of the holes 10a1 is not limited to one and may be two. Further, the O-ring 20 seals between the cap portion 10 a and the head of the plug bolt 12.
[0017]
The nut portion 10b has a convex spherical portion 10b1 at the tip, and a female screw 10b2 is formed inside. The nut portion 10b is formed by screwing the female screw 10b2 of the nut portion 10b to the head 1a of the anchor 1. The convex spherical portion 10b1 is securely fixed to the concave spherical portion 9b of the washer 9 by pressure bonding.
[0018]
The nut 10 with a cap for anchor is made of stainless steel, galvanized, electroplated, or surface-treated for rust prevention by resin coating or the like. The washer 9 and the washer 8 are also processed in the same manner. The cap portion 10a has a certain length so that the anchor 1 can be used if the length of the anchor 1 protruding from the surface of the bearing plate 7 is within a certain range. When in use, the nut portion 10b is turned up, and grease-like rust preventive oil is filled until the nut portion 10b reaches a half position.
[0019]
Next, when the nut 10 with the cap for the anchor is removed from the hole 10a1 and screwed into the head 1a of the anchor 1, the air in the cap portion 10a and excess rust preventive oil are removed. It comes out of the hole 10a1. Then, after the convex spherical surface portion 10b1 of the nut portion 10b is fixed by pressure to the concave spherical surface portion 9b of the washer 9, the assembly work is completed by screwing the stopper bolt 12 into the hole 10a1 . The nut 10 with an anchor cap may have a structure in which an oil cap is attached to the rear part of a normal hex nut, and the outer diameter of the cap part 10a may be circular or hexagonal like the nut part 10b.
[0020]
Thus, the nut 10 with a cap for anchors is screwed and fixed to the concave spherical surface portion 9b of the washer 10 by screwing the nut portion 10b to the head portion 1a of the anchor 1. Since the cap cap nut 10a and the nut portion 10b are integrally formed with the anchor cap nut 10, the number of parts is small and assembly is easy.
[0021]
Moreover, the nut 10 with a cap for anchors can make the cap part 10a small as much as possible by integrating the cap part 10a and the nut part 10b.
[0022]
In addition, by integrating the cap portion 10a and the nut portion 10b, the cap portion 10a needs to be enlarged to allow for this angle deviation even if the bearing plate 7 and the anchor 1 are not 90 °. Absent. The inner diameter of the cap portion 10 a of the nut 10 with an anchor cap is only required to be slightly larger than the outer diameter of the anchor 1. Therefore, it is economical because the amount of the rust inhibitor used can be reduced as compared with the prior art.
[0023]
In addition, the sheath 3 can prevent water from entering the anchor 1 from between the nut 10 with the anchor cap and the washer 9 and between the washer 8 and the washer 9, and the head of the anchor 1 can be combined with the sheath 3. The overall rust prevention function is ensured.
[0024]
Next, an anchor mounting apparatus according to another embodiment is shown in FIG. FIG. 4 is an enlarged view of the anchor attachment device. This embodiment is configured similarly to the embodiment of FIGS. 1 to 3, but in this embodiment, the washer 8 and the washer 9 are integrally formed. Since the washer 8 and the washer 9 are integrally formed, the number of parts is small and attachment is easy.
[0025]
Next, an anchor mounting apparatus according to another embodiment is shown in FIGS. FIG. 5 is a cross-sectional view of a case where a lock bolt made of a deformed PC steel rod in the form of a fully threaded bolt is adopted as an anchor as an embodiment of the present invention and applied to an anchor of a type covered with a sheath, and FIG. It is an enlarged view of an attachment apparatus.
[0026]
In this embodiment, the same members as those in the embodiment of FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof is omitted. The nut 10 with an anchor cap of this embodiment is integrally formed with a cap portion 10a for storing a rust preventive agent and a nut portion 10c that is screwed to the head portion 1a of the anchor 1. Nut portion 10c includes a concave spherical surface portion 10c1 on the tip portion, the female screw 10 b 2 is formed inside, by screwing the female screw 10 b 2 of the nut part 10c on the head 1a of the anchor 1 The concave spherical surface portion 10c1 of the nut portion 10C is fixed by pressure to the convex spherical surface portion 9c of the washer 9.
[0027]
Thus, the nut 10 with a cap for anchors is screwed and fixed to the convex spherical surface portion 9c of the washer 9 by screwing the nut portion 10c to the head portion 1a of the anchor 1. Since the cap cap nut 10a and the nut portion 10c are integrally formed with the anchor cap nut 10, the number of parts is small and assembly is easy. Further, the anchor cap nut 10, since the inner diameter of the cap portion 10a is such Idake slightly larger than the outer diameter of the head 1a of the anchor 1, and can reduce the amount of comparison with conventionally rust economy Is.
[0028]
Furthermore, the anchor attachment apparatus of other embodiment is shown in FIG. FIG. 7 is an enlarged view of the anchor attachment device. This embodiment is configured in the same manner as the embodiment of FIGS. 5 and 6, but in this embodiment, the washer 8 and the washer 9 are integrally formed.
[0029]
Moreover, the anchor attachment apparatus of other embodiment is shown in FIG. FIG. 8 is an enlarged view of the anchor attachment device. This embodiment is configured in the same manner as the embodiment of FIGS. 1 to 3, but in this embodiment, a recess 7 b in which the head 1 a of the anchor 1 is embedded is provided at the anchor mounting position of the bearing plate 7. The nut 10 with an anchor cap is positioned in the recess 7b. Since the head 1a of the anchor 1 or the nut 10 with the cap for the anchor may be damaged by falling rocks or the like from the upper part, it is better to embed it inside the recess 7b of the bearing plate 7, and in this case, the recess 7b having a small inner diameter may be used. Therefore, since the cross-sectional defect of the bearing plate 7 is reduced, and the design of the bearing plate 7 in consideration of the small sectional defect is sufficient, the stability of the slope can be obtained in an economical and rational manner.
[0030]
In the above embodiments, the case where the present invention is applied to an anchor employing a lock bolt as an anchor has been described as an example. However, as described above, the present invention employs a ground anchor or the like as an anchor and does not use a sheath. It can also be applied to types of anchors. Further, even if the anchor, instead of the deformed PC steel bar, Ru can be applied against the anchor using another PC steel wire or the like from the PC steel wire or PC steel.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the cap portion having an inner diameter slightly larger than the anchor diameter capable of receiving the head of a long civil engineering anchor such as a lock bolt and storing the rust preventive agent therein is provided. since the formation of the nut which is screwed to the head integrally integrated cap parts for parts and rust for fixing, only a small number of parts, screwing nut to anchor head It is easy to assemble, and the cap part's inner diameter is only slightly larger than the anchor diameter , so the inner volume of the cap part for rust prevention can be reduced . The amount used can be reduced and it is economical .
[0032]
In the second aspect of the present invention, by screwing the nut of the cap nut anchor head of the anchor, conveniently be crimped to the washers, yet its cap nut anchors cap part and the nut part since There are formed integrally, the number of parts is easy to assemble in the small Ino. In addition, since the inner diameter of the cap portion of the nut with the cap for the anchor is only slightly larger than the anchor diameter , the amount of the rust inhibitor can be reduced as compared with the prior art as in the first aspect of the invention , which is economical. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a case where a lock bolt made of a deformed PC steel rod in the form of an all screw bolt is employed as an anchor and applied to an anchor of a type covered with a sheath.
FIG. 2 is an enlarged view of an anchor attachment device.
FIG. 3 is a view showing a nut with an anchor cap.
FIG. 4 is an enlarged view of an anchor attachment device according to another embodiment.
FIG. 5 is a cross-sectional view when a lock bolt made of a deformed PC steel rod in the form of a fully threaded bolt according to another embodiment is adopted as an anchor and applied to an anchor covered with a sheath.
FIG. 6 is an enlarged view of an anchor attachment device according to another embodiment.
FIG. 7 is an enlarged view of an anchor attachment device according to another embodiment.
FIG. 8 is an enlarged view of an anchor attachment device according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Anchor, 7 ... Bearing plate, 8 ... Washer, 9 ... Washer, 10 ... Nut with cap for anchor

Claims (2)

The cap part with a slightly larger inner diameter than the anchor diameter that can receive the head of a long civil anchor such as a rock bolt and stores the anticorrosive agent inside, and the nut part that is screwed to the head of the anchor are integrated. A nut with a cap for a civil engineering anchor, wherein a cap bolt is screwed into a hole formed in the cap portion. A long anchor for civil engineering such as a lock bolt that is inserted through an insertion hole formed in the bearing plate and protrudes the head side from the surface of the bearing plate, and is placed on the bearing plate via a washer. For an anchor in which a washer, a cap portion having an inner diameter slightly larger than an anchor diameter capable of receiving the head portion of the anchor and storing a rust preventive agent therein, and a nut portion screwed to the head portion of the anchor are integrally formed and a cap nut, the cap nut for anchor by screwing the nut on the head of the anchor, the civil engineering anchor, which comprises crimped to the nut portion to the washer Mounting device.

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