JP2003301523A - Drain anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core bar (shaft) driven type drain anchor, dispensing with a separate drive rod. <P>SOLUTION: This drain anchor is composed of an anchor body 1 having slots 6, 7 at least at the tip and on this side, and a center pin 2 having a cylindrical enlarged diameter part 9 at the tip, A gap passing water therethrough is provided between the shaft part 8 of the center pin and a center hole in the central part of the anchor body 1. Preferably the sectional form of the shaft part 8 of the center pin is triangular. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a post-drainage anchor.

[0002]

[Background Art] As a measure for preventing concrete floor slabs from falling off from the inner walls of tunnels and the viaduct ceilings of railways and roads,
It is used to bond continuous fiber sheets or install coated steel sheets. Concrete is more or less water permeable,
Also, water permeation through internal cracks is unavoidable. The continuous fiber sheet does not allow water to pass through, and the steel sheet is apt to rust, so wetting is avoided. A drainage pipe is installed so that water does not collect between the concrete and the continuous fiber sheet / coated steel sheet. A drainage anchor is often used as a drainage pipe for fixing the continuous fiber sheet / coated steel plate.

As the water-draining anchor, an internal cone driving type or a body driving type anchor has been used in order to allow water to flow to the outside through a hole inside the anchor body. It wasn't used. The installation work of the anchor on the ceiling part, etc. should be done with facing up, whether it is an internal cone driving type or a main body driving type, it is a driving work in an unreasonable posture while inserting and holding the driving rod. . Also, in order to confirm whether or not the expansion part is expanded and fixed according to the construction procedure, 1
It was necessary to insert the inspection rod and the like into the anchor body.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a core rod (shaft part) driven type drain anchor which does not require the use of a separate driving rod. .

[0005]

In order to solve the above-mentioned problems, a water-draining anchor according to the present invention comprises an anchor body 1 having slivers 6, 7 at least at its tip and at its proximal end.
A gap that allows water to pass between the shaft 8 of the center pin and the center hole provided in the center of the anchor body 1 and including the center pin 2 having a cylindrical expanded portion 9 at its tip. Is present. The cross-sectional shape of the shaft portion 8 of the center pin is preferably a rice ball shape (triangle).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is based on the provision of a water passage space between a core rod (shaft portion) of a drainage anchor of a core rod driving type and an anchor body. Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a half cross-sectional outline view showing a drainage anchor of the present invention. 2 shows a center pin of the present invention, FIG. 2 (a) is a plan view, and FIG.
(B) is a side view. FIG. 3 is a plan view showing an embodiment of a washer that can be used in the present invention. Figure 4
It is explanatory drawing which shows the state before and after construction (expansion) of the water-draining anchor of this invention, (a) shows the state before construction (expansion), (b) shows the state after construction (expansion).

In FIG. 1, 1 is an anchor body and 2 is a center pin. In the anchor body 1,
A center hole 3 having a reduced diameter portion 4 is formed at the tip,
The collar portion 5 is formed at the hand portion. Further, the anchor body 1 is provided with an anchor end slivers 6 and an anchor head slivers 7. Basically, one pair of slivers is provided at both ends of the diameter with the central axis of the anchor body 1 sandwiched therebetween, but three at a 120 ° interval, or a total of four at each end of two orthogonal diameters, etc., as appropriate. The number can be set. Although FIG. 1 shows an example in which the anchor end slivers 6 and the anchor head slivers 7 are provided at the same phase position of the anchor body 1, it is possible to shift both of them by an appropriate phase angle.

In FIG. 1, a long anchor end sled 6
And the shorter anchor head slivers 7 are shown, but modifications such as changing the ratio of the lengths of both slivers or increasing the number of slivers can be made. When increasing the number of steps of the thread, it is preferable to make the phase positions of the thread different from each other so that water can be easily drained from all directions of the anchor. The anchor end sled 6 is a slit for draining water and at the same time a slit for expanding the tip of the anchor. It is preferable to knurl the outer periphery of the anchor body 1 at the tip and other positions.

As shown in FIG. 2 (b), one embodiment of the center pin 2 is a columnar shape that serves as a cone for expanding the tip of the anchor at the tip of the rice ball (triangle) shaft 8. It has an enlarged diameter portion 9, and the tip of the cylindrical enlarged diameter portion 9 is tapered. The shaft portion 8 of the center pin and the cylindrical enlarged diameter portion 9 may be continuous by forming a step, but it is preferable that a transition portion is provided to be continuous. The outer diameter of the cylindrical expanded portion 9 corresponds to the diameter of the center hole 3 of the anchor body 1, and the outer diameter of the outer envelope surface of the shaft portion 8 is equal to the outer diameter of the cylindrical expanded portion 9. By striking the center pin 2, the columnar expanded diameter portion 9 engages with the reduced diameter portion 4 of the center hole of the anchor body 1 to expand the tip portion of the anchor body 1 and cut into the concrete hole wall, The drain anchor is mechanically fixed to the concrete body.

FIG. 2 shows an example in which the shaft portion 8 of the center pin has a rice ball shape (triangle), but the shape is not limited to such a shape. An oval cross section in which both ends of the outer envelope surface of the shaft portion 8 are missing, a square cross section in which both ends of two outer diameters of the outer envelope surface of the shaft portion 8 orthogonal to each other are missing, or an appropriate number of grooves Can be formed, and the like. The surface of the missing portion may be flat, convex, or concave. What is essential is that a gap is formed between the center hole 3 provided in the anchor body 1 of the water draining anchor and the shaft portion 8 of the center pin so that water can pass therethrough.

The anchor body 1 may be manufactured from a pipe formed by rolling a plate material into a cylindrical shape.
The one manufactured from seamless pipe or the one manufactured from plastic material by plastic working or cutting work can have a large anchor cross-sectional area, the tensile strength and shear strength can be increased, and It is more preferable because it has an excellent fixing function. A washer 10 can be used for the collar portion 5 when constructing the drainage anchor. An example of the washer 10 is shown in FIG. In the washer 10 shown in FIG. 3, holes 11 having an appropriate size and number are formed.

FIG. 4 shows a state before and after construction (expansion) of the water-draining anchor of the present invention. The washer 10 is inserted into the anchor hole 14 formed in the concrete body 12 and the covering body 13.
(A) and the center pin 2 projecting from the anchor body 1 is driven into the concrete body 12 to penetrate the concrete body 12 (b). The anchor is fixed to the concrete body 12. After the center pin 2 has been sufficiently driven in, the center pin 2 does not protrude from the collar portion 5 of the anchor body 1.

[0013]

According to the water-draining anchor of the present invention, it is not necessary to prepare a separate driving rod for fixing the water-draining anchor, and whether the water-draining anchor is fixed or not.
Whether or not the fixation is sufficient can be easily checked afterwards by visually visually observing whether or not the center pin projects from the collar portion of the anchor body.

[Brief description of drawings]

FIG. 1 is a half cross-sectional outline view showing a drainage anchor of the present invention.

FIG. 2 shows a center pin of the present invention, (a) is a plan view and (b) is a side view.

FIG. 3 is a plan view showing an embodiment of a washer that can be used in the present invention.

FIG. 4 is an explanatory view showing a state before and after construction (expansion) of the water-draining anchor of the present invention, (a) before construction (expansion),
(B) shows the state after construction (expansion).

[Explanation of symbols]

1: Anchor body 2: Center pin 3: Center hole 4: Reduced diameter part 5: Tsuba 6: Slippery end of anchor 7: Anchor head slot 8: Shaft part (of center pin) 9: Cylindrical expanded part (of center pin) 10: Washer 11: Hole (of washer) 12: Concrete body 13: Cover 14: Anchor hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeshi Kobayashi             Sanko 1-24-10 Higashi-nippori, Arakawa-ku, Tokyo             -In Techno Co., Ltd. (72) Inventor Kimio Masuda             Sanko 1-24-10 Higashi-nippori, Arakawa-ku, Tokyo             -In Techno Co., Ltd. F-term (reference) 2D055 LA03 LA16                 2E125 AA76 AB01 AB17 AC13 AG20                       BA17 BA26 BA33 BC09 BD01                       BE07 BF01 EA01

Claims (2)

[Claims] 1. An anchor body 1 having at least tip portions and slivers 6, 7 at the proximal portion, and a center pin 2 having a columnar expanded diameter portion 9 at the tip portion. A center pin shaft portion 8 and an anchor body. 1. A water-draining anchor, characterized in that there is a gap through which water can pass between a center hole provided at the center of 1. 2. The water-removing anchor according to claim 1, wherein the cross-sectional shape of the shaft portion 8 of the center pin is a rice-ball-shaped (triangular) shape.