JP2001254477A - Fixing tool for threaded reinforcing bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing tool for a threaded reinforcing bar which can be easily manufactured, is inexpensive and excellent in fixing and work performance. SOLUTION: First and second fixing screw portions 3, 4 are tightened to each other, and fixed to predetermined position of the threaded reinforcing bar 2 in a mode of a double nut to form the fixing tool 1 for the threaded reinforcing bar. A fixing portion to demonstrate the fixing effect only during the tightening is provided on each tightening surface of the first and second fixing screw portions 3, 4. The fixing tool 1 is easily and inexpensively manufactured with a simple configuration, and each tightening surface can be firmly fixed during the tightening without any effect in fitting to the threaded reinforcing bar 2. By firmly fixing each tightening surface, the fixed condition by tightening the first and second fixing screw portions 3, 4 at the predetermined positions of the threaded reinforcing bar 2 can be reliably ensured, and the fixing capacity at the first and second fixing screw portions 3, 4 can be surely demonstrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a fixing device for a screw reinforcing bar which is used for reinforcing a reinforcing member in an area where a reinforcing member is densely arranged in an RC structure.

[0002]

2. Description of the Related Art Conventionally, as this type of fixing device, for example, the following devices (1) and (2) are generally known. (1) An invention (see Patent Publication / Patent No. 2662150) relating to the fixing of a main reinforcing bar (screw reinforcing bar) in a reinforced concrete house or the like, which is screwed into the screw reinforcing bar. And a fixing plate part for increasing the fixing force.

(2) An invention related to a method of fixing a reinforcing bar (refer to Japanese Patent Application Laid-Open No. 6-65889), in which two nuts screwed to a screw reinforcing bar are tightened together and pressed against each other. By fixing it to a predetermined position on a screw rebar by forming it as a double nut, it becomes a fixing tool.

[0004]

SUMMARY OF THE INVENTION However, the conventional
The fixing device described in (1) has an excellent fixing performance and construction performance since the screw portion and the fixing plate portion are manufactured by integral molding by casting. However, since it is made of a casting, its production is cumbersome, time-consuming, and expensive.

For this reason, in the conventional fixing device described in the above (1), the entire fixing work of the screw rebar has been troublesome, time-consuming and expensive. On the other hand, the conventional fixing device described in the above (2) can fix the screw rebar by means of a very simple and inexpensive double nut. However, as an operation of fixing both nuts at predetermined positions of the screw reinforcing bar, it is necessary to strongly tighten the two nuts and press them together with a torque wrench or the like.

Therefore, in the conventional fixing device described in the above (2), in order to ensure that the fixing ability can be exhibited, it is necessary to surely hold the press-contact state of both nuts, that is, to fix both nuts. It is important to control the torque in order to prevent the tightening state from becoming loose.

However, it is very difficult to control the torque, that is, it is impossible to visually check whether the torque is loose. In addition, even if this torque is well controlled and both nuts are securely pressed against each other, they will not be able to withstand the force during construction, such as the impact of concrete casting, and will be loosened. It is conceivable that it will not be performed reliably.

[0008] This means that the two nuts cannot exhibit the fixing ability, and the two nuts cannot be used as fixing devices for the screw rebar. As described above, the conventional fixing device described in the above (2) can fix the screw rebar with both nuts having a very simple and inexpensive configuration, but as described above, it is necessary to ensure that the fixing capability can be exerted. There are also many problems.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a fixing device for a screw rebar which can be manufactured easily and inexpensively and which can surely exhibit a fixing ability. .

[0010]

In the present invention, the conventional fixing device described in the above (2), which can have a very simple and inexpensive structure, is used. That is, the fixing device for screw rebar according to the present invention includes a fixing first screw portion and a fixing second screw portion screwed to the screw rebar (for example, both nuts screwed to the screw rebar). By tightening each other,
It is constituted by fixing it to a predetermined position of the screw rebar.

Further, in the present invention, in order to reliably exert the fixing ability, the first screwing portion for fixing and the second screwing portion for fixing are adhered to each other, and the first screwing portion for fixing is fixed to the first screwing portion for fixing. The fastening state with the second screw portion for fixing can be reliably maintained. That is, the fixing first screw portion or the second fixing screw portion of the fixing device for a screw rebar according to the present invention has a fastening surface with the second fixing screw portion or the first fixing screw portion. Is provided with an adhesive portion that exerts an adhesive effect only at the time of tightening.

According to the present invention, the fastening surface of the first and second screwing portions for fixing is provided with an adhesive portion which exerts an adhesive effect only at the time of fastening. Each fastening surface can be firmly adhered at the time of fastening each other without any influence.

The fact that the respective fastening surfaces can be firmly adhered allows the fixing state of the first and second fixing portions to be securely fastened to each other at predetermined positions of the screw reinforcing bars. For this reason, in the present invention, a special fixing process is not required, and a fixing device can be easily formed using a nut or the like for an existing screw rebar. It can be fixed firmly and firmly to a predetermined position, so that the fixing ability can be surely exhibited.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a fixing device for a screw rebar according to the present invention. The fixing device 1 for screw rebars (see FIG. 1) tightens a first screwing portion 3 for fixing and a second screwing portion 4 for fixing screwed to the screw rebar 2 to thereby fix the screw rebar 2 to a predetermined position. It is configured by fixing to a position.

The first screwing portion 3 for fixing or the second screwing portion 4 for fixing has a fastening surface with the second screwing portion 4 for fixing or the first screwing portion 3 for fixing. An adhesive portion 5 that exerts an adhesive effect only at the time of tightening is provided on the tightening surface. The bonding portion 5 in this embodiment is provided on each tightening surface, and a capsule 5a (see FIG. 1 (b)) which breaks at a predetermined pressure and an adhesive filling the capsule 5a 5b (see FIG. 1 (a)).

The capsule 5a of the bonding portion 5 is configured to break at a predetermined pressure (relatively small pressure).
In addition, the first screwing portion 3 for fixing and the second screwing portion 4 for fixing in this embodiment are constituted by nuts 6 for a general screw reinforcing bar 2.

The fixing device 1 for a screw bar according to the present invention having such a configuration is mounted on the screw bar 2 as described below. First, as shown in FIGS. 1B and 1C, the tightening surface 6a of the nut 6 which is the first screwing portion 3 for fixing is used.
Then, a plurality of capsules 5a filled with the adhesive 5b are provided.

This means that an adhesive portion 5 that exerts an adhesive effect only at the time of tightening is provided on the tightening surface of the first screwing portion 3 for fixing. The bonding portion 5 (the capsule 5a filled with the adhesive 5b) may be provided on the tightening surface 6a of the nut 6, which is the second screwing portion 4 for fixing. Next, as shown in FIG. 1 (b), a nut 6 which is a second screwing portion 4 for fixing is screwed into the screw rebar 2, and a plurality of capsules 5a are provided on a tightening surface 6a. The nut 6, which is one threaded portion 3, is screwed to the screw rebar 2.

Next, the nut 6 which is the first screwing portion 3 for fixing is
The nut 6 serving as the fixing second screwing portion 4 is fastened to each other to form a so-called double nut, so that both nuts 6 are fixed at predetermined positions of the screw reinforcing bar 2. At the time of this mutual tightening, the capsule is compressed by the compressive force of the tightening surfaces 6a of both nuts 6.
5a is destroyed, and the adhesive 5b flows out from the broken capsule 5a.

When the adhesive 5b flows out of the capsule 5a, the fastening surfaces 6a of the two nuts 6 adhere to each other as shown in FIG. And the nut 6 as the second screwing portion 4 for fixing are bonded and bonded. By adhesively bonding with the adhesive 5b, the two nuts 6 in the form of a double nut are integrated, and are firmly fixed at a predetermined position of the screw reinforcing bar 2 without being loosened. It will be shaped.

The flow of the adhesive 5b will be described in detail with reference to FIG. 2. The adhesive 5b flowing out of the capsule 5a is:
It is conceivable that the fluid flows along the tightening surfaces 6a of the nuts 6 and also flows between the nut 6 and the screw reinforcing bar 2. For this reason, as shown in FIG. 2, the adhesive 5b adheres the first fixing screw portion 3 and the second fixing screw portion 4 (the tightening surfaces 6a of the nuts 6) and also fixes each screw portion. It is also conceivable that the threaded portions 3, 4 (both nuts 6) and the screw rebar 2 are bonded together by entering the gap between the screw rebars 2 and the nuts 3 and 4 (between the nuts 6 and the screw rebar 2). .

The state of adhesion with the adhesive 5b is shown in FIG.
As shown in FIG. 2 and FIG. 2, it can be confirmed by looking at the adhesive 5b protruding from between the two nuts 6.
As described above, the fixing of the fixing device 1 for a screw rebar of the present invention to the screw rebar 2 is completed.

As described above, according to the present invention, the first fixing screw portion 3 and the second fixing screw portion 4 screwed to the screw rebar 2.
By applying a compressive force between the two screwing portions 3 and 4 and bonding the fastening surfaces of the two screwing portions 3 and 4 with the bonding portion 5 (adhesive 5b), the two screwing portions 3 and 4 are bonded together. As a result, the two threaded portions 3 and 4 are firmly fixed to the screw reinforcing bar 2.

Therefore, the fixing device 1 for a screw rebar can be easily formed by the first screwing portion 3 for fixing and the second screwing portion 4 for fixing. Moreover, by using the nuts 6 for the existing screw rebars 2 as the first screwing portion 3 for fixing and the second screwing portion 4 for fixing, the fixing tool 1 for screw rebar can be formed more simply and inexpensively. it can.

Further, the tightened state of the first fixing screw portion 3 and the second fixing screw portion 4 can be securely and firmly held by the adhesive 5b. Accordingly, the adhesive 5b can firmly fix the fixing device 1 for screw rebar formed by tightening the first screwing portion 3 for fixing and the second screwing portion 4 for fixing to the screw rebar 2. Tightening is not loosened, and the fixing ability of the fixing device 1 for a screw rebar can be reliably exhibited.

Further, what can be firmly fixed by the adhesive 5b is that the first fixing portion 3 and the second fixing portion 4 need only be tightened with enough force to break the capsule 5a. Becomes That is, only the fixing first screwing portion 3 and the fixing second screwing portion 4 screwed to the screw rebar 2 are manually tightened (both nuts 6), and a tightening tool such as a torque wrench is not required. Thus, the fixing device 1 for a screw rebar can be easily formed.

The fact that this tightening tool is not required means that even if the working space is narrow, the tightening operation can be easily performed as long as there is a space for rotating the nut 6 by hand.
The adhesive 5b to be filled in the capsule 5a is a commercially available adhesive, and the following two types can be used.

That is, when it is necessary to instantaneously bond and consolidate, a chemically reactive adhesive (such as cyanoacrylate) is used. On the other hand, if it is necessary to improve the accuracy of the fixing position, a certain amount of time is required for consolidation. Therefore, a solvent type adhesive (component: chlorobrene rubber, an organic solvent, cyclohexane, insopropyl acetate, acetone) and an epoxy adhesive Use agent.

FIG. 3 shows another embodiment of the fixing device 1 for a screw rebar according to the present invention. First fixing portion 3 for fixing here
As shown in FIG. 3A, the second screwing portion 4 for fixing is constituted by a fixing plate 7 having a female screw portion 7b for the screw reinforcing bar 2. Further, the bonding portion 5 here, that is, the adhesive
As in the embodiment shown in FIG. 1, a plurality of capsules 5a filled with 5b are provided on the tightening surface 7a of the fixing plate 7 which is the first screwing portion 3 for fixing (see FIG. b) and (c)).

In this case, a commonly used steel plate can be used as the material of the fixing plate 7, and the cost is reduced. Further, since the fixing plate 7 has a larger diameter than the nut 6 of the embodiment in FIG. 1, the fixing force of the fixing device 1 for screw rebar can be increased.

As described above, the fixing first screwing portion 3 and the fixing second screwing portion 4 in the fixing device 1 for a screw rebar according to the present invention are different from the fixing plate 7 shown in FIG. Any form can be used as long as it can be screwed to the screw rebar 2 and fastened to each other like the nut 6 shown in FIG.

FIG. 4 shows another embodiment of the fixing device 1 for a screw rebar according to the present invention. First fixing portion 3 for fixing here
Is composed of a nut 6 for the screw rebar 2, and the second fixing screw portion 4 is formed of a fixing plate 7 having a female screw portion 7b. In this way, the fixing plate 7 can increase the fixing force of the fixing tool 1 to the screw reinforcing bar 2 and increase the fixing force.
The nut 6 facilitates the tightening operation.

The fixing first screwing portion 3 (nut 6) and the fixing second screwing portion 4 (fixing plate 7) are shown in FIG.
As shown in (1), the form of attachment to the screw reinforcing bar 2 can be reversed. The shape of the fixing plate 7 shown in FIGS. 4 and 3 is circular in the embodiment of FIGS. 4 and 3, but may be polygonal such as hexagonal.

FIGS. 6 and 7 show another embodiment of the present invention. The fastening of the first fixing portion 3 for fixing and the second screwing portion 4 for fixing is performed with one (see FIG. 6) or a plurality of (see FIG. 7) fixing promoting plates 8 interposed therebetween. Have gone. Further, an adhesive portion 5 is provided on each of the fastening surfaces of the first fixing portion 3 for fixing, the second fixing portion 4 for fixing, and the plate body 8 for fixing promotion.

In this way, the fixing promoting plate 8 becomes
Since it is sandwiched between the first screwing portion 3 for fixing and the second screwing portion 4 for fixing, it is screwed into the screw rebar 2 by the female screw portion 7b like the fixing plate 7 shown in FIGS. It can be fixed without matching. Therefore, the fixing force of the fixing tool 1 to the screw reinforcing bar 2 can be increased by the fixing promoting plate 8 which does not require the female screw portion 7b and can be manufactured at a lower cost than the fixing plate 7.

As shown in FIG. 7, when two fixing promoting plates 8 are interposed, the bonding portion 5 may not be provided between each fixing promoting plate 8.

[0037]

According to the present invention, the first screwing portion for fixing and the second screwing portion for fixing are fastened to each other, for example, in the form of a double nut, so as to be positioned at a predetermined position of the screw rebar. By fixing, it becomes a fixing tool for screw rebar. Therefore, the fixing device for screw rebar can be easily and inexpensively manufactured with a simple configuration.

Further, the first screwing portion for fixing and the second screwing portion for fixing, which are fixing devices for screw rebars, are provided with an adhesive portion which exerts an adhesive effect only at the time of tightening. For this reason, each fastening surface can be firmly adhered to each other when they are fastened to each other without any influence at the time of attachment to the screw rebar.

The fact that the fastening surfaces can be firmly adhered makes it possible to reliably hold the first screwing portion for fixing and the second screwing portion for fixing at a predetermined position of the screw rebar in the state where they are fastened to each other. From these facts, according to the present invention, a special fixing process is not required, the fixing device can be easily formed by using the first fixing screw portion and the fixing second screw portion, and the fixing device can be formed by using a screw rebar. The fixing ability can be reliably and firmly fixed at a predetermined position so that the fixing ability can be reliably exhibited.

[Brief description of the drawings]

1 (a) is a schematic view showing a fixing device for a screw rebar according to the present invention, FIG. 1 (b) is a schematic diagram showing a manufacturing process of the fixing device for a screw rebar according to the present invention, and (c) is (b) FIG. 2 is a view taken along line AA of FIG.

FIG. 2 is a schematic enlarged sectional view showing a state in which an adhesive flows out of an adhesive portion when the fixing device for a screw rebar of the present invention is fixed to the screw rebar.

FIG. 3A is a schematic view showing another embodiment of the fixing device for a screw rebar according to the present invention, and FIG. 3B is a schematic diagram showing a manufacturing process of the fixing device for a screw rebar of the embodiment of FIG. (c) is a view taken on line BB of (b).

FIG. 4 is a schematic view showing another embodiment of the fixing device for a screw rebar according to the present invention.

FIG. 5 is a schematic view showing another embodiment of the fixing device for a screw rebar of the present invention.

FIG. 6 is a schematic view showing another embodiment of the fixing device for a screw rebar according to the present invention.

FIG. 7 is a schematic view showing another embodiment of the fixing device for a screw reinforcing bar of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixing device for screw rebars, 2 ... Screw rebar, 3 ... First screwing part for fixing, 4 ... Second screwing part for fixing, 5 ... Adhesive part, 5a ... Capsule, 5b ... Adhesive, 6 ... Nut , 6a: fastening surface, 7: fixing plate, 7a: fastening surface, 7b: female screw portion, 8: fixing promoting plate.

Claims (3)

[Claims] 1. A screw formed by fixing a first screwing portion for fixing and a second screwing portion for fixing screwed to a screw rebar to a predetermined position of the screw rebar by tightening each other. A fixing tool for a reinforcing bar, wherein the first screwing portion for fixing or the second screwing portion for fixing has a fastening surface with the second screwing portion for fixing or a fastening surface with the first screwing portion for fixing. A fixing part for producing an adhesive effect only at the time of the tightening. 2. The device according to claim 1, wherein the adhesive portion is provided on the tightening surface, and includes a capsule that breaks at a constant pressure and an adhesive filling the capsule. Fixing tool for screw rebar. 3. The fixing of the first screwing portion for fixing and the second screwing portion for fixing is performed with one or a plurality of fixing promoting plates interposed therebetween, and the first screwing portion for fixing is fixed. 3. The fixing device according to claim 1, wherein the bonding portion is provided on each of the fastening surfaces of the screw portion, the second fixing screw portion, and the fixing promoting plate. .