JP2517056Y2 - Rebar safety cap - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety cap used by covering the tip of a reinforcing bar.

[0002]

2. Description of the Related Art Conventionally, as a safety cap that is used by covering the tip of a reinforcing bar at a construction site where reinforcing bars are used to prevent accidents due to exposed reinforcing bars, it is used as a safety cap.
Those disclosed in both No. 87 and Japanese Utility Model Publication No. 59-40524 are known.

This will be described with reference to FIGS.
Reference numeral 1 denotes a main part that protects a human body from the reinforcing bar A, and a cylindrical leg portion 2 is integrally provided below the main part 1 to integrally form a mushroom-shaped safety cap.

In this safety cap, a mounting hole 3 for the reinforcing bar A is formed so as to open downward as a hollow part of the leg part 2, and a reinforcing bar engaging recess 4 is provided at one peripheral part of the main part 1.
Are provided in a state of penetrating in the axial direction of the mounting hole 3 and opening to the outer peripheral side. In FIG. 11, reference numerals 5 ... Denote a plurality of vertical ribs provided on the peripheral surface of the mounting hole 3.

This safety cap is attached to the tip of the reinforcing bar A by the mounting hole 3 and is generally embedded in the concrete C as it is.

In addition, in the reinforcing bar connecting portion, the lower part of the reinforcing bar B is engaged with the reinforcing bar engaging recess 4 and is fixed to the original reinforcing bar A by a binding wire (not shown) while maintaining a predetermined covering margin.

As a result, the rebar reinforcement B can be connected along the original rebar A (close to each other).

By forming the reinforcing bar engaging recess 4 deep and making it smaller than the reinforcing bar diameter, or by partially narrowing it, the reinforcing bar holding force is strengthened and this safety cap is used. It can also be used as a reinforcing bar connector.

[0009]

However, according to such a conventional safety cap, as shown in FIG. 11, when the space S is left above the mounting hole 3 in the state where the reinforcing bar A is mounted on the reinforcing bar A, the concrete C After the casting, the air in the space S promoted the corrosion of the reinforcing bar A, which might lead to cracking of the concrete C.

Therefore, the present invention provides a safety cap for a reinforcing bar that allows air in the space to escape to the outside when pouring concrete when a space is left above the mounting hole.

[0011]

According to a first aspect of the present invention, a mounting hole for a reinforcing bar is provided in a central portion in a state of opening downward, and an external communication hole has an upper end open to the outside and a lower end is the mounting hole. It is provided in the state of communicating with.

According to a second aspect of the present invention, in the structure of the first aspect, the reinforcing bar engaging concave portions are provided at a plurality of circumferential positions in the peripheral portion in a state of penetrating in the axial direction of the mounting hole and opening to the outer peripheral side. It will be.

According to a third aspect of the present invention, in the structure of the first or second aspect, the whole is formed of an elastic material such as plastic or rubber.

According to a fourth aspect of the invention, in the configuration of the first or second aspect, the whole is formed of a metal material.

According to a fifth aspect of the invention, in the structure of the fourth aspect, a steel material is used as the metal material.

According to a sixth aspect of the invention, in the structure of the fifth aspect, soft iron is used as the steel material.

According to a seventh aspect of the invention, in the configuration of the first or second aspect, the whole is made of mortar.

[0018]

According to the above construction, even if a space is left above the mounting hole when it is attached to the reinforcing bar, the mortar component enters into the mounting hole from the external communication hole when placing concrete, and the mortar component creates a space. The air inside is released to the outside. Therefore, the corrosion of the reinforcing bar is suppressed.

On the other hand, as another problem that the conventional safety caps shown in FIGS. 10 and 11 have, since there is only one reinforcing bar engaging concave portion 4, the connecting position of the reinforcing bar cannot be selected. Therefore, at the time of connecting the reinforcing bars, the cap is rotated toward a position where it is easy to connect, or it is forcibly connected at the current position of the concave portion 4 even though it is difficult to work, which lowers workability. Was there.

Further, since the main portion 1 is formed in a cap-like shape that extends to the outer peripheral side in order to maximize the contact area with the human body and enhance the original protective function, when the concrete is placed after the reinforcing bars are laid. , The main part 1 becomes an obstacle to the flow of concrete.

In this case, the reinforcing bar engaging concave portion 4 functions as a passage for guiding the concrete to the lower side of the main portion 1, but the conventional cap having only one concave portion 4 has insufficient passage function. In particular, at the connecting portion of the reinforcing bar, the concave portion 4 is replenished and blocked by the reinforcing bar B, so that the passage function is not fulfilled at all.

Therefore, using a conventional cap,
There is a problem that a cavity (so-called nest) where the concrete is not filled is likely to be generated under the main portion 1.

On the other hand, according to the structure of claim 2, since the reinforcing bar engaging recesses are provided at a plurality of circumferential positions,
The degree of freedom in selecting the reinforcing bar connecting position is increased by the number of the recesses, and the workability of connecting the reinforcing bar is improved while maintaining the original protective effect.

Moreover, the function of the passage at the time of pouring concrete is expanded by the plurality of recesses, and the flow of concrete is improved. For this reason, it becomes difficult for a cavity not filled with concrete to occur.

According to the structure of claim 3 in which an elastic material such as plastic or rubber is used as a material, the cushioning property of the cap relieves the impact when the human body is in contact, so that the damage is small and the protective function is provided. It will be expensive.

On the other hand, when the cap is formed of such an elastic material as plastic, it is treated as a foreign matter in construction due to the remarkable difference in material from the reinforcing bar, and it is required to remove it from the reinforcing bar when placing concrete. May be done.

In this respect, according to the constitutions of claims 4 to 6, the cap made of metal (steel material in claim 5 and soft iron in claim 6) is treated as a part of the reinforcing bar and removed at the time of placing concrete. Never be asked.

Further, among the iron and steel materials, if soft iron is used as claimed in claim 6, when it is driven into the reinforcing bar and mounted,
Since it is easily deformed and fits easily to the reinforcing bar, it can be easily and firmly mounted.

According to the structure of claim 7, which is entirely made of mortar, it fits well with concrete and is firmly bonded to concrete.

[0030]

1st Embodiment (see FIGS. 1 to 3) This safety cap is made of an elastic material such as plastic or rubber, and is a cylindrical leg having a mounting hole 13 below a cap-shaped main portion 11. The part 12 is integrally connected.

Further, in this safety cap, the reinforcing bar engaging recess 14 to which the reinforcing bar B can be added when the reinforcing bar is connected.
Are provided at four circumferential positions in the peripheral portion of the main portion 11 at equal intervals (90 °).

Further, the external communication hole 15 is provided at the center of the main portion 11 in a state of vertically penetrating, that is, the lower end communicates with the mounting hole 13 and the upper end opens to the upper surface (outside) of the main portion. ing.

In FIG. 2, reference numerals 16 ... Denote a plurality of vertical ribs provided on the peripheral surface of the mounting hole 13.

According to this safety cap, when pouring concrete, as shown in FIG.
Since the air penetrates into the mounting hole 13 from 5, even if the space S is left in the upper part of the mounting hole 13 in a state where the space S is mounted on the reinforcing bar A, the air in this space S is escaped to the outside by the intrusion of the mortar. Therefore, it is possible to suppress the corrosion of the reinforcing bar A which causes cracking of the concrete C.

On the other hand, at the time of connecting the reinforcing bars, the connecting position of the additional reinforcing bar B can be selected from the four concave portions 14 ... Therefore, the degree of freedom in selecting the connecting position is widened.

Therefore, unlike the conventional cap shown in FIGS. 10 and 11, it is not necessary to rotate the concave portion 4 so as to come to a desired position or force the connecting position to the concave portion position. Reinforcing bar connection work can be performed at the optimum position without hanging.

Further, when pouring concrete, the four concave portions (three concave portions in the reinforcing bar connecting portion) 14 ... Function as a passage for guiding the concrete to the lower side of the main portion 11, whereby the flow of concrete is improved. Therefore, the main part 11
It is difficult for concrete cavities to occur underneath.

Second Embodiment (Refer to FIG. 4) The cap of the second embodiment is made entirely of a steel material and has basically the same shape as the cap of the first embodiment (the vertical rib 16 is not provided). Has been done.

As the cap material (steel material), various materials such as soft iron, carbon steel, alloy steel and cast steel can be used.

Further, such a cap can be entirely molded at the same time by press forming called header punching. Alternatively, the external communication hole 15 may be provided by hole forming after the main portion 12 and the leg portion 12 are formed by header punching. Alternatively, the whole may be formed by casting.

According to this cap, since it is entirely formed of the same steel material as the reinforcing bar A, it is treated as a part of the reinforcing bar A when mounted on the reinforcing bar A, and is removed as a foreign substance when the concrete C is placed. You will never be asked.

Further, if soft iron is used among the steel materials, it is easily deformed and fits well with the reinforcing bar A when it is driven into the reinforcing bar A for mounting, so that it is easy to mount and a strong mounted state is obtained. be able to.

Third and Fourth Embodiments (Refer to FIGS. 5 and 6) In the above embodiment, the reinforcing bar engaging recesses 14 are provided at four places, whereas in the third embodiment, three places, and in the fourth embodiment. It is provided in five places.

With the constructions of the third and fourth embodiments, the intended purpose of the present invention is to expand the degree of freedom in selecting the connecting position of the reinforcing bar and improve the flow of concrete as compared with the conventional cap. Can be achieved.

Fifth Embodiment (see FIG. 7) The cap of each of the above embodiments is formed in a mushroom shape composed of a cap-shaped main portion 11 and a cylindrical leg portion 12, whereas in the fifth embodiment, the cap is formed. As another example of the cap shape, the entire cap is formed into an abacus shape. In FIG. 7, 17 is a mounting hole, 18 ... Reinforcing bar engaging recesses, and 19 is an external communication hole.

Sixth and Seventh Embodiments (Refer to FIGS. 8 and 9) The caps of both of these embodiments are formed in a hollow and cylindrical shape with the lower surface opened, and the upper end surface is spherical in the sixth embodiment, 7
In the embodiment, it is formed flat. 20 is a mounting hole, 2
Reference numeral 1 is an external communication hole.

The caps of these two embodiments are slightly inferior to the caps shown in the above-mentioned embodiments in terms of the protective function of the human body, but at the time of pouring concrete, a portion which obstructs the flow of concrete. Since there is no cavities, there is no danger of cavities.

By the way, although the elastic material and the steel material are exemplified as the cap material in the above embodiment, the cap of the present invention can also be formed of non-ferrous metal such as copper and aluminum, alloy or mortar.

When made of a non-ferrous metal or alloy, basically, it can be embedded in concrete as a part of the reinforcing bar as in the case of a steel material.

Further, if it is made of mortar, it is well compatible with concrete and firmly bonds with concrete.

[0051]

[Effects of the Invention] According to the present invention as described above, even if a space is left in the upper part of the mounting hole when it is attached to the reinforcing bar, the mortar part enters into the mounting hole from the external communication hole when placing concrete. However, the air in the space is released to the outside by this mortar component. Therefore, the corrosion of the reinforcing bar can be suppressed.

On the other hand, according to the second aspect of the present invention, since the reinforcing bar engaging concave portions are provided at a plurality of circumferential positions, the degree of freedom in selecting the reinforcing bar connecting position is expanded by the number of the concave portions, and the original protective effect is obtained. The workability of connecting the reinforcing bars is improved while maintaining the above.

Moreover, the function of the passage at the time of pouring concrete is expanded by the plurality of recesses, and the flow of concrete is improved. For this reason, it is difficult for a cavity not filled with concrete to occur.

According to the invention of claim 3 in which an elastic material such as plastic or rubber is used as a material, when the human body is in contact with the cushioning effect of the cap, the impact is moderated so that the damage is small and the protective function is provided. It will be expensive.

On the other hand, according to the inventions of claims 4 to 6, the cap made of metal (steel material in claim 5 and soft iron in claim 6) is treated as a part of the reinforcing bar, and is removed when pouring concrete. You will never be asked.

Furthermore, among the iron and steel materials, if soft iron is used as in claim 6, when the soft steel is driven into the reinforcing bar and mounted,
Since it is easily deformed and fits easily to the reinforcing bar, it can be easily and firmly mounted.

According to the invention of claim 7, which is entirely made of mortar, it fits well with concrete and is firmly bonded to concrete.

[Brief description of drawings]

FIG. 1 is a perspective view of a safety cap according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the cap in use.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is a view, corresponding to FIG. 3, showing a third embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 3 showing a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing a sixth embodiment of the present invention.

FIG. 9 is a sectional view showing a seventh embodiment of the present invention.

FIG. 10 is a perspective view of a conventional safety cap in use.

FIG. 11 is a sectional view of the same.

[Explanation of symbols]

 11 Main part 12 Leg part 13,17,20 Mounting hole 15,19,21 External communication hole 14,18 Reinforcing bar engaging recess

Claims (7)

(57) [Scope of utility model registration request] 1. A mounting hole for a reinforcing bar is provided in a central portion in a state of opening downward, and an external communication hole is provided in a state of having an upper end open to the outside and a lower end communicating with the mounting hole. Safety cap for rebar. 2. Reinforcement engaging recesses are provided at a plurality of circumferential positions of the peripheral portion so as to penetrate in the axial direction of the mounting hole and open to the outer peripheral side. Rebar safety cap. 3. The safety cap for a reinforcing bar according to claim 1, wherein the entire structure is made of an elastic material such as plastic or rubber. 4. The safety cap for a reinforcing bar according to claim 1 or 2, wherein the whole is made of a metal material. 5. The safety cap for a reinforcing bar according to claim 4, wherein a steel material is used as the metal material. 6. A safety cap for a reinforcing bar according to claim 5, wherein soft iron is used as the steel material. 7. The safety cap for a reinforcing bar according to claim 1, wherein the entire structure is made of mortar.