JP2001019346A - Anchor metal for lifting platelike body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preclude the possibility that a platelike body is cracked by a reinforcement inside the platelike body when the flexible platelike body such as an asphalt mat is lifted, and to eliminate welding required for fixing an anchor metal on the reinforcement. SOLUTION: This metal is a fitting which is provided with a pair of opposing leg parts 2, 2, and a top part 3 for connecting the paired leg parts 2, 2 each other, and having an eye-bolt-and-the-like attaching part 4 formed to attach an eye bolt and the like attached to a suspension metal, and in which a space opened in sides between the paired leg parts 2, 2 and the top part 3 is formed. Rectangular flat steel insertion openings 5 are formed respectively in the paired leg parts 2, 2 to insert a flat steel 6 slidably in a condition that a long side of its rectangular cross-section is extended horizontally, and spaces 5a for allowing insertion of a lock member 7 for prohibiting longitudinal-directional slide of the steel 6 inserted into the openings 5 are formed within the openings 5 in an upper side of the steel 6 inserted into the openings 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor for lifting a plate-like body used for lifting a plate-like body having flexible dwelling such as an asphalt mat.

[0002]

2. Description of the Related Art As a plate-like body having a flexibility ratio, asphalt mats are used for increasing friction of caissons, L-shaped blocks, etc .; It is used for water shielding, protection of slopes such as seawalls and coastal embankments.

Japanese Patent Application Laid-Open No. 10-109881 discloses a method for lifting an asphalt mat to transport it to a predetermined position, and for attaching an asphalt mat to a reinforcing bar for a caisson bottom plate for increasing friction of a caisson or the like. A method of hoisting an asphalt mat having a plurality of anchors at appropriate intervals by using a crane or the like by hooking the anchor bolts that are connected to the eye bolts attached to the suspensions or the reinforcing bars for the caisson bottom plate to the anchors. Is disclosed.

As shown in a perspective view of FIG. 13, this conventional anchor fitting has a pair of opposed ends b, b, and an eyebolt which connects these ends b, b to each other and is attached to a hanging fitting. And a top part c having a keyhole-shaped mounting hole d for mounting the like, and a round bar-shaped reinforcing bar e embedded in the asphalt mat is inserted into the center of the ends b and slightly below the ends b. A rebar insertion hole f is formed.
In addition, g is a mixture inflow prevention plate for preventing a mixture for asphalt mat production from flowing into a mounting portion such as an eyebolt. In order to manufacture asphalt mats, in a factory or a yard, a plurality of ones in which one reinforcing bar e is inserted into the reinforcing bar insertion holes f of the plurality of anchor fittings a are prepared, and are made to correspond to the width of the asphalt mat to be manufactured. These anchors a are arranged on the reinforcing bars e so that the anchors a are arranged at appropriate intervals, and the anchors are fixed to the reinforcing bars e by spot welding. Next, the reinforcing bar e to which the anchor fittings a are attached is set in a mold, and a mixture obtained by mixing an asphalt material is poured into the mold to form a mat lower layer, and then a reinforcing core material such as a fiber net is laid. Then, a mixture is further cast on the reinforcing core material and the reinforcing bar e up to the top end of the anchor fitting a to form a mat upper layer, thereby completing an asphalt mat.

[0005]

The above-mentioned conventional anchor for lifting asphalt mats has a circular reinforcing bar insertion hole f.
In this configuration, a relatively large shearing force acts on the asphalt mat due to the reinforcing bar e, and when the asphalt mat is softened in the extremely hot summer season, the asphalt mat is lifted. In this case, there is a possibility that the asphalt mat may tear at a place where the reinforcing bar is arranged.

In addition, since the spot welding is performed to fix the anchor fitting a on the reinforcing bar e, it takes much time and labor to weld a large number of anchor fittings one by one. A welding technician who is a specialized technician must be assigned in addition to the staff, and a welding machine and its power supply must also be arranged.If it is not possible to arrange a welding technician for on-site work, rebars and metal For example, it is necessary to transport a product welded to a predetermined position, thereby lowering the efficiency of the asphalt mat manufacturing operation and increasing the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of anchors for lifting a flexible plate-like body such as the asphalt mat described above. When the asphalt mat is lifted, a reinforcing bar in the asphalt mat is used. The asphalt mat reduces the risk of the asphalt mat tearing, does not require welding to fix the anchor bracket on the rebar, and allows the anchor bracket position to respond freely to sudden design changes on site without prior preparation. An object of the present invention is to provide an anchor for lifting a plate-like body, which can improve work efficiency in manufacturing and reduce costs.

[0008]

According to the present invention, there is provided an anchor for lifting a plate-like body, wherein the pair of opposite legs are connected to each other, and the pair of legs are attached to the hanging bracket. A metal fitting having an apex on which an eyebolt or the like for attaching an eyebolt or the like is formed, and a space opened laterally between the pair of legs and the apex; In each of the legs, a flat steel insertion opening having a shape capable of slidably inserting the flat steel such that the long side of the rectangular cross section extends in the horizontal direction is formed, and these flat steel insertion openings are formed. In the longitudinal direction of the flat bar inserted through the flat bar insertion opening in or adjacent to the flat bar insertion opening above or below the flat bar inserted through the flat opening. Form a space that allows the insertion of locking members that prohibit sliding Characterized in that it was.

[0009]

According to the present invention, flat steel can be arranged as a reinforcing bar disposed inside an asphalt mat such that the long side of its rectangular cross section is the horizontal side. The shear forces acting are much smaller, thus reducing the risk of asphalt mat tearing by the rebar. Further, by inserting a locking member into a space formed in or adjacent to the opening on the upper or lower side of the flat steel, sliding of the flat steel with respect to the anchor fitting can be prohibited, so that welding work can be performed. It is very easy to fix the anchor to the flat bar without the need for a fin.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show one embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 (a) is a side view, FIG. 2 (b) is a front view, and FIG. ) Is a plan view, and FIG.
3 is a front view of the locking member, FIG.
(C) is a plan view.

An anchor 1 for lifting a plate-like body according to the present invention is used for connecting a pair of opposing legs 2, 2 to each other, and for attaching an eyebolt or the like attached to the hanging metal. A top portion 3 on which an attachment portion 4 such as an eyebolt is formed is provided, and a space between the leg portions 2 and 2 and the top portion 3 is open to the side. The legs 2, 2 are formed so as to gradually open toward the lower part, and the metal fitting 1 has a trapezoidal overall shape.

The mounting portion 4 such as an eye bolt has a circular bolt insertion hole 4a and a circular bolt fixing hole 4 smaller in diameter than the bolt insertion hole 4a connected to the insertion hole 4a via a connection hole 4c.
b is formed as a keyhole-shaped opening. 8 is
It is a cylindrical asphalt inflow prevention wall having a closed bottom for preventing inflow of the asphalt mat production mixture into the eyebolt mounting portion 4.

Each leg 2 has a shape in which a flat bar 6 functioning as an asphalt mat reinforcing bar can be slidably inserted so that the long side of the rectangular cross section extends in the horizontal direction. The rectangular opening 5 constituting the flat steel insertion opening is formed so that its long side extends in the horizontal direction. Flat steel 6 inserted through these openings 5
A space 5a is formed in the upper opening 5 to allow the insertion of a locking member 7 for preventing the flat bar 6 inserted through the opening 5 from sliding in the longitudinal direction. That is, the short side extending in the vertical direction of the opening 5 is designed to have a length obtained by adding the height of the space 5 a allowing the insertion of the locking member 7 to the thickness of the flat steel 6.

In the present embodiment, the locking member 7 is
As shown in FIG. 7, the locking member 7 comprises an inclined knob portion 7a and a spring portion 7b which bends upward by about 90 degrees and extends therefrom and then further bends downward by about 120 degrees and extends downward. It is inserted into the upper space 5a in the opening 5 in the direction A in FIG. Although the thickness of the flat steel 6 varies depending on manufacturing tolerances, the spring portion 7b of the locking member 7 elastically deforms following the variation in the thickness of the flat steel 6, thereby allowing the locking member 7 to open the opening 5 without hindrance. Can be inserted inside. By inserting the locking member 7, the flat steel 6 is prohibited from sliding with respect to the opening 5 by the wedge action of the locking member 7, so that the metal fitting 1 is fixed at a predetermined position on the flat steel 6.

In order to manufacture an asphalt mat using this anchor 1, one flat steel 6 is inserted into the flat steel insertion opening 5 of the plurality of anchors 1 in a factory or on-site yard.
Are prepared, and anchor brackets 1 are provided at appropriate intervals according to the width of the asphalt mat to be manufactured.
After the anchors 1 are arranged on the flat bars 6 so that the anchors 1 are arranged, the anchor members 1 are fixed to the flat bars 6 by inserting the locking members 7 into the upper spaces 5 a of the openings 5.
Next, as shown in FIG. 4, a formwork 9 is prepared, a roadbed paper 10 is laid in the formwork 9, a rust prevention sheet 11 is laid on the bottom of the anchor 1, and a flat sheet on which the anchor 1 is attached. Steel 6
Is set in the mold 9. At this time, as is clear from the enlarged view of FIG. 14, the flat bar 12 is disposed on both sides of the metal fitting 1 on the flat bar 6 so as to be orthogonal to each other. Next, a mixture obtained by mixing the asphalt material is poured into the formwork 9 to form a mat lower layer 13a as shown in FIG. 5, and then a reinforcing core material 14 such as a fiber net is laid. 6, 12
Further, the mixture is cast on the top of the anchor 1 to form a mat upper layer 13b, thereby completing the asphalt mat 13. In this embodiment, the flat bar 12 is placed on the flat bar 6.
Are arranged at right angles, when lifting the bracket 1,
The flat steel 12 is supported by the flat steel 6 and can be lifted at the same time to increase the strength of the asphalt mat.

The asphalt mat 13 thus produced
To carry it into the caisson yard, etc.
As shown in FIG. 5, the eyebolt 15 attached to the hanging bracket 22 is hooked to the anchor 1. The eyebolt 15 has a ring-shaped hook portion 15c above a screw portion 15b provided with a thumb screw 15a.
Is formed in an elliptical cross section. This screw part 1
After the bolt 5b is inserted into the bolt insertion hole 4a of the mounting portion 4 such as an eyebolt, the bolt 5b is moved to the bolt fixing hole 4b through the connecting hole 4c, and is rotated by 90 degrees in the bolt fixing hole 4b to be locked in the bolt fixing hole 4b. Let it. In this state, the thumb screw 15a is tightened, and the eye bolt 15 is attached to the anchor 1.

When a structure such as a caisson is to be constructed on the laid asphalt mat 13, the eye bolt 15 is removed from the anchor 1, and an anchor bolt (not shown) is replaced in the same manner as described above. Just attach it.

The locking member is not limited to the one described above, but may be shaped as shown in FIG. 6, for example. FIG. 6 (a)
6B is a front view of the locking member 16, FIG. 6B is a side view thereof, and FIG. 6C is a plan view thereof. Locking member 16 shown in FIG.
Comprises a knob 16a and an insertion portion 16b.
In the figure b, the central portion is bent upward to form a projection 16 (c), and the projection 16 (c) is formed in a wedge shape gradually becoming wider and higher toward the knob 16a.

FIG. 7 is a side view showing another example of the locking member. In this example, the locking member 17 includes a knob 17a and an insertion portion 17b, and a distal end portion 17c of the insertion portion 17b is formed in a wedge shape having a slope that gradually increases toward the knob 17a.

The space allowing the insertion of the locking member is formed in the flat steel insertion opening below the flat steel instead of in the flat steel insertion opening above the flat steel as in the above embodiment. You may make it. As shown in FIG. 8, a semicircular small hole 18 is formed adjacent to the upper side of the flat steel insertion opening 5,
After the flat bar is inserted into the flat bar insertion opening, a nail may be inserted into the small hole 18 to hold down the top surface of the flat bar. The small hole 18 may be formed adjacent to the lower side of the flat steel insertion opening 5.

As described above, various shapes and structures of the locking member can be used, and a space allowing the insertion of the locking member can be formed in various modes. In short,
A locking member selected to inhibit longitudinal sliding of the flat bar inserted through the flat bar insertion opening is inserted into or adjacent to the flat bar insertion opening. All that is required is that a space is formed that allows this.

In order to prevent the mixture from flowing into the mounting portion 4 such as an eyebolt during the manufacture of the asphalt mat 13,
Not only the cylindrical prevention wall 8 of FIG. 1 but also a plate-like member 19 as shown in FIG. 9 is inserted between the two legs 2 to prevent the mixture from flowing into the mounting portion 4 such as an eyebolt. You may make it.

The shape of the anchor is not limited to the trapezoidal shape shown in FIG. 1, but may be another shape such as a square shape shown in FIG. 10 or a C-shape shown in FIG.

Further, the mounting portion such as an eyebolt is not limited to the keyhole-shaped opening shown in FIG. 1, and for example, as shown in FIG.
3 and welded.
Various changes are possible, such as screwing the one screw portion 21a.

By using the above-mentioned anchor and flat steel in place of the wire for lifting a large mat for preventing scouring such as underwater laying, not only the conventional both ends can be lifted, but also an arbitrary number of intermediate wires can be used. Since the wire can be suspended at any of the locations, the tension when the wire is used can be eliminated, and the distribution of the lifting load can be averaged and dispersed. Therefore, the bending is reduced, and the generation of a crack during lifting can be suppressed. Due to less bending in construction, especially in laying work such as slopes, work accuracy such as alignment is good and efficient, and there is no protrusion of wire like conventional mats for scour prevention, so it is underwater Thus, the joint amount and joint work at the time of abutment are reduced, and the alignment work is simplified.

[0027]

As described above, according to the present invention, flat steel can be arranged as a reinforcing bar arranged inside an asphalt mat such that the long side of its rectangular cross section is the side in the horizontal direction. The shearing force acting on the asphalt mat is much smaller than that of the reinforcing bar, and the risk of the asphalt mat being torn by the reinforcing bar can be reduced. Further, by inserting a locking member into a space formed in or adjacent to the opening on the upper or lower side of the flat steel, sliding of the flat steel with respect to the anchor fitting can be prohibited, so that welding work can be performed. Thus, the anchor metal can be fixed to the flat steel very easily without the need for the asphalt mat, and the work efficiency in asphalt mat production can be improved and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an anchor according to an embodiment of the present invention.

2A is a side view of the metal fitting, FIG. 2B is a front view of the metal fitting, and FIG. 2C is a plan view of the metal fitting.

FIG. 3 shows a locking member, wherein (a) is a front view,
(B) is a side view, and (c) is a plan view.

FIG. 4 is a perspective view showing a manufacturing process of the asphalt mat.

FIG. 5 is a partial cross-sectional view showing a state in which an asphalt mat is lifted.

6A and 6B show another example of the locking member, wherein FIG. 6A is a front view, FIG. 6B is a side view, and FIG. 6C is a plan view.

FIG. 7 is a side view showing another example of the locking member.

FIG. 8 is a front view of an anchor fitting showing another example of a flat steel insertion opening.

FIG. 9 is a side view of an anchor fitting showing another example of the mixture inflow prevention wall.

FIG. 10 is a side view showing another example of the anchor.

FIG. 11 is a side view showing another example of the anchor.

FIG. 12 is a side view of an anchor fitting showing another example of a mounting portion such as an eyebolt.

FIG. 13 is a perspective view showing a conventional anchor.

FIG. 14 is an enlarged perspective view of a portion A in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anchor bracket for lifting plate-like body 2 Leg 3 Top 4 Mounting part for eyebolt 5 Opening for flat steel insertion 6 Flat steel 7 Locking member

Claims (1)

[Claims] A pair of legs which are opposed to each other, and a top portion on which an eyebolt or the like mounting portion for connecting an eyebolt or the like mounted on a hanging bracket is formed. A space formed between the legs and the top portion to open laterally, wherein each of the pair of legs has a long side extending in a horizontal direction with a rectangular cross-section of a flat steel. In this manner, flat steel insertion openings having a shape capable of being slidably inserted are formed, and the flat steel insertion openings above or below the flat steel inserted through these flat steel insertion openings are formed. Or a space adjacent to the flat steel insertion opening is formed to allow the insertion of a locking member for inhibiting the flat steel inserted through the flat steel insertion opening from sliding in the longitudinal direction. An anchor for lifting a plate-like body.