JPH0648053Y2 - Bar material for fixing concrete buried objects - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention is for embedding a concrete embedding material in a wall of a reinforced concrete building.
Before the concrete is placed in the formwork, the embedded matter is attached to the reinforcing bar that is attached to the buried form and is reinforced in the concrete formwork by binding and fixing it with a wire such as a bind wire. Concrete for fixing to the rebar while being pressed to
The present invention relates to a bar material for fixing buried objects. here,
The concrete buried object as referred to in the present invention means a box for cable wiring, a fluid box for accommodating a joint to which a fluid pipe such as a hot water pipe or a gas pipe is connected, a conduit or a fluid pipe is connected to a formwork. It refers to a pipe end fixing tool fixed to the inside of the concrete mold, and refers to an embedded object fixed to the inner surface of the concrete mold in a pressed state.

[0002]

2. Description of the Related Art Conventionally, an iron wire called a wire has been used as a bar material of this kind, and it is attached to an embedded object through a rectangular mounting plate or directly attached to the embedded object with a screw. It is being done. Since the outer surface of this iron wire is smooth, when binding and fixing this iron wire to the reinforcing bar with a wire such as a bind wire, the iron wire slides against the bind wire and the position of the iron wire shifts, making it difficult to fix embedded objects. In addition to this, there is a problem that the buried object is buried at a position deviated from the regular position. Even before the concrete is cast, even if the buried object is fixed in the proper position, the iron wire is displaced from the bind wire due to the casting pressure of the concrete, which causes the buried object to be displaced from the specified position. There was also a problem that it was buried.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to securely bind and fix a bar member attached to a concrete buried object by a wire rod such as a bind wire without being displaced in the reinforcing bar.

[0004]

In order to solve this problem, the means adopted by the present invention presses and fixes the concrete embedded object on the inner surface of the concrete mold, so that it can be bent by hand. In addition, it has a tensile strength that can press the embedded object against the inner surface of the mold in a bent state, and is a bar material that is attached to the embedded object and is bound and fixed to the reinforcing bar arranged in the mold with a wire such as a bind wire. In, the peripheral groove for locking the wire is formed on the outer surface.

[0005]

[Advantage of the Invention] A peripheral groove is formed on the outer surface of the bar member attached to the concrete buried object, and when the bar member is bound to the reinforcing bar by the wire rod, the peripheral groove is formed on the outer surface of the bar member. Part of the wire rod enters and is locked. For this reason,
The bar material is less likely to be displaced with respect to the bundled wire rod, and the work for fixing the embedded object to the reinforcing bar is simplified, and at the same time, the embedded object is prevented from being displaced even by the placing pressure of the concrete.

[0006]

[Example] First, a concrete mounting plate was used to mount a concrete plate.
An example in which the bar material is attached to the buried object will be described.
FIG. 1 is a perspective view showing a state where bar materials B are fixed to opposite ends of a rectangular mounting plate 1, FIG. 2 is a partially enlarged perspective view of the bar material B, and FIG. , This bar material B
FIG. 4 is a perspective view of a state in which a cable wiring box (hereinafter, simply referred to as “box”) S is fixed to the vertical reinforcing bar 5 via a wire, and FIG. 4 is a sectional view of the same state. As shown in FIG. 1, both ends in the vertical direction of the rectangular mounting plate 1 are bent in the same direction by press molding, and the bent portion 1
The two bar members B are sandwiched in parallel with each other. The bar material B is made of an iron wire called a number wire, is bendable by hand, and has a tensile strength capable of pressing the embedded object to which it is attached to the inner surface of the mold in the bent state. is doing. As shown in FIG. 2, a spiral groove 2 is formed on the outer surface of the bar material B over the entire length. The spiral groove 2 is formed during a step of forming a bar material in which a long iron wire wound in a coil shape is unwound, straightened, and then cut into a predetermined length.
That is, when the cutting tool is rotated in a plane perpendicular to the moving direction of the moving iron wire immediately before cutting, the continuous spiral groove 2 is easily formed on the outer surface of the continuous straight iron wire. In addition, a pair of small protrusions 3 are formed on the mounting plate 1 along the vertical direction at a predetermined interval during press molding.

Using this bar material B, the box S is fixed to the vertical rebars 5 or the horizontal rebars 6 arranged between the concrete forms in the following manner. That is, by attaching the mounting plate 1 to the back surface of the bottom plate 7 of the box S, inserting the small protrusions 3 provided therein into the holes 8 provided in the bottom plate 7, and bending the mounting plate 1, the bottom plate of the box S is formed. Two bar materials B are attached to the back surface of 7 through the mounting plate 1. Then, each bar material B is bent in the depth direction of the box S, and is also bent in a direction away from each other, and both ends thereof are bound and fixed to the vertical reinforcing bar 5 by using thin wire materials 9 such as bind wires. In this state, when the mold frame 11 is erected and brought into contact with the opening surface of the box S, the bar material B is bent and a protruding tension is generated. The inner surface of the frame 11 is pressed and adheres closely. In this state, the concrete C is placed between the molds 11.

Here, the spiral groove 2 is continuously formed on the outer surface of the bar material B, and when the bar material B is bound and fixed to the vertical rebar 5 by the thin wire 9, it is shown in FIG. As described above, a part of the wire 9 is inserted and locked between the spiral grooves 2 of the bar material B. Therefore, the bar material B is less likely to be displaced with respect to the wire 9 and the work of fixing the box S to the reinforcing bars 5 and 6 is simplified, and at the same time, even if the concrete placing pressure acts on the box S, this The box S will not come off. Further, the spiral groove 2 formed on the outer surface of the bar material B increases the sliding resistance of the bar material B with respect to the reinforcing bars 5 and 6, and the bar material B does not easily slip on the reinforcing bars 5 and 6. Also prevents the box from being displaced.

In the present invention, it is a requirement that a peripheral groove is provided on the outer surface of the bar material, but the peripheral groove is not limited to the spiral shape described above, and a large number of annular grooves are provided at a predetermined pitch. Good. Further, the circumferential groove does not necessarily have to be provided on the entire circumference, and grooves that are intermittent in the circumferential direction by press molding may be provided at a predetermined pitch. It is desirable that the pitch of the circumferential groove corresponds to the interval between the wire rods when binding the bar rods to the reinforcing bars. Further, the groove width of the circumferential groove may be a width in which a plurality of bar materials are accommodated at the same time, but in order to prevent the wire material from moving in this groove, it corresponds to the outer diameter of one wire material. It is desirable to set the width to Further, since the bar material according to the present invention has a structure in which a peripheral groove is provided on the outer surface thereof,
As compared with the case where the protrusion is provided, there is an advantage that the adhesion to the reinforcing bar is improved and the fixing force to the reinforcing bar is increased.

In the above embodiment, the bar material is attached to the buried object through the attachment plate, but as shown in FIG. 6, the bar material insertion provided on the back surface of the bottom plate 7 of the box S is performed. The bar member B may be directly attached to the buried object by inserting the bar member B into the groove 13 and pressing the bar member B with the head 14a of the screw 14 screwed in the vicinity of the bar member B.

Further, when there is no reinforcing bar near the buried position of the buried object, a supporting member may be provided between the reinforcing bars to bind the bar member to this supporting member. In the present invention, in such a case, since the support member is equivalent to the reinforcing bar in that it is a member for binding the bar members, it is understood that this supporting member is also included in the reinforcing bar. Also,
It is also possible to use a smoothed iron wire as the bar material, and in this case, bending by hand becomes easier.

[0012]

As described above, in the bar material according to the present invention, when the peripheral groove is formed on the outer surface and the bar material is bound to the reinforcing bar by the wire material, a part of the wire material enters into the peripheral groove. To prevent the bar material from slipping relative to the wire rod, at the same time, the circumferential groove on the outer surface of the bar material increases the sliding resistance to the reinforcing bar, so that the bar material does not easily slip against the reinforcing bar, The operation of fixing the embedded object is simplified, and the positional displacement of the embedded object is eliminated even when the concrete is placed, so that the embedded object can be reliably embedded in the proper position.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a bar material B according to the present invention is sandwiched and fixed to the upper and lower ends of a mounting plate 1.

FIG. 2 is a partially enlarged perspective view of a bar material B according to the present invention.

FIG. 3 is a perspective view showing a state in which the box S is fixed to the vertical reinforcing bar 5 by a bar material B attached to the box S via a mounting plate 1.

FIG. 4 is a sectional view of the same state.

FIG. 5 is an enlarged cross-sectional view showing a state in which a wire rod 9 enters and is locked in the spiral groove 2 of the bar member B.

FIG. 6 is a perspective view showing a state in which a bar material B is directly attached to a box S.

[Explanation of symbols]

 B: Bar material S: Box for cable wiring (concrete buried object) 2: Spiral groove (circumferential groove) 5: Vertical reinforcing bar 6: Horizontal reinforcing bar 9: Wire material

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Kazutaka Hayashi 2-15-1, Shioike-cho, Nakamura-ku, Nagoya-shi, Aichi Hayashi Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. Since the concrete embedded object is pressed and fixed to the inner surface of the concrete mold, it can be bent by hand and has a tensile strength capable of pressing the embedded object to the inner surface of the mold in the bent state. A bar material that is attached to an embedded object and is fixedly bound to a reinforcing bar arranged in a formwork with a wire such as a bind wire, the peripheral groove for locking the wire being formed on the outer surface. A bar material for fixing a concrete buried object, which is characterized in that