JPH09228559A - Spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer which has a high workability to be mounted on steel bars and can hold the stably when they are installed in a form. SOLUTION: A spacer concerned is composed of a reinforcement holding part 2 in approx. C-shape and two legs 3 furnished below the reinforcement holding part 2, wherein the reinforcement holding part 2 is mode of an elastic material and equipped with at least two projections 7 on the inside surface in its upper part while a certain spacing is set, and a plurality of spheres 10 are formed at the bottoms of the legs 3. The legs 3 are arranged spreading downward, and a reinforcing rib 8 may be furnished in an intersecting form between the two legs 3, 3. Mounting of the spacer 1 can be performed very simply by inserting into steel bars from an insert hole provided crosswisely in the reinforcement holding part 2 and detaining upon hitching the steel bars at a detaining piece 4. Thus the working easiness is ensured.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a spacer,
More specifically, the present invention relates to a spacer for holding a reinforcing bar embedded in concrete at a predetermined position when manufacturing a concrete product.

[0002]

2. Description of the Related Art As a spacer of this type, the applicant has disclosed in Japanese Utility Model Publication No. 60-18499 (utility model registration No. 1624).
No. 302) proposes a spacer having the structure disclosed in US Pat.

The spacer proposed by the applicant of the present invention includes a reinforcing bar fitting portion for holding a reinforcing bar, a shaft portion integrally formed on the lower side of the reinforcing bar fitting portion, and a screw on the lower end side of the shaft portion. It is composed of legs to be worn.

The reinforcing bar fitting portion has a substantially cylindrical shape, and the upper side thereof is opened to form a reinforcing bar insertion port. The reinforcing bar insertion port is formed of reinforcing bar insertion pieces provided on both left and right sides, and reinforcing bar sandwiching pieces are respectively extended to the lower end side of the reinforcing bar insertion piece. Further, the reinforcing bar insertion piece and the reinforcing bar sandwiching piece are formed of members having elasticity.

[0005]

To attach the spacer of this conventional example to the reinforcing bar, the shaft portion is grasped by hand, the reinforcing bar insertion port is directed to the outer peripheral surface of the reinforcing bar, and then the reinforcing bar is pressed with a strong force. You have to push it into the clamp. Therefore, since the spacer cannot be easily attached to the rebar,
It had the drawback of poor workability.

Further, as described above, since the work of attaching the spacers to the reinforcing bars is performed manually, it is not possible to accurately attach the plurality of spacers to the reinforcing bars in the same direction (directly below). In such a case, that is, when the reinforcing bars are installed on the formwork in a state where the spacers are attached to the reinforcing bars in a slanted state, the legs are not stably placed, and the holding state of the reinforcing bars is also slanted. There was a flaw.

Therefore, in the spacer in the conventional example, the workability in attaching to the reinforcing bar is improved, and
Stablely place the spacer when the rebar is installed in the form,
There is a problem that needs to be solved to make the holding state of the reinforcing bar accurate.

[0008]

As a concrete means for solving the above-mentioned problems of the prior art, the present invention provides a substantially C-shaped reinforcing bar engaging portion and two pieces provided below the reinforcing bar engaging portion. The rebar-retaining portion is formed of an elastic member, and at least two protrusions are formed at predetermined positions above the inner peripheral surface of the leg portion. The present invention provides a spacer characterized in that a plurality of spherical portions are formed, and the leg portions of the two pieces are formed so as to expand toward the lower side, respectively, and between both leg portions. Has a configuration in which reinforcing ribs are provided in a cross shape.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 to FIG.
In FIG. 1, reference numeral 1 indicates a spacer integrally formed from a synthetic resin material such as plastic. The spacer 1 is provided on the substantially C-shaped reinforcing bar engaging portion 2 and below the reinforcing bar engaging portion 2. It is composed of two pieces of legs 3.

The reinforcing bar engaging portion 2 is composed of a slightly narrow engaging piece 4 located on the upper side and a wide receiving piece 5 connected to one end side of the engaging piece 4, and is generally made of The reinforcing bar insertion port 6 is formed in a lateral direction and has a substantially C shape.

Further, since the locking piece 4 is formed to have elasticity as a whole, even when the spacer 1 is locked to a large-diameter reinforcing bar, the locking piece 4 is spread and locked. Can be made.

An upper position on the inner peripheral surface of the reinforcing bar engaging portion 2,
That is, the locking piece 4 is formed with two protrusions 7 at predetermined intervals. Therefore, even when the spacer 1 is locked to the reinforcing bar having a small diameter, the protrusion 7 comes into contact with the outer peripheral surface of the reinforcing bar,
The spacer 1 can be locked in a stable state without any misalignment.

The leg portion 3 is formed in a plate shape having substantially the same width as the receiving piece 5, and the reinforcing bar engaging portion 2 (receiving piece 5).
Are formed so as to spread downward from the lower end of each. Therefore, as will be described later, when the spacer 1 is placed on the mold, the reinforcing bar can be held in a stable state.

Reinforcing ribs 8 are formed in a cross shape (brace) between the leg portions 3 to improve the strength of the leg portions 3.

Further, since the reinforcing rib 8 is located above the lower end side of the leg portion 3, when the spacer 1 is placed on the formwork and concrete is poured, the reinforcing rib 8 is placed below the reinforcing rib 8. In particular, the concrete is sufficiently cast, and the strength of the concrete product in the vicinity of the spacer 1 does not decrease.

A bar-shaped base 9 is provided on the lower end side of each leg 3. The bases 9 are formed to be longer than the width of the legs 3, and the lower end surface of each base 9 is formed with a spherical portion 10 at a predetermined interval at both end sides. .

By forming the spherical portion 10 on the base 9 in this way, when the spacer 1 is placed on the mold, the parts other than the spherical portion 10 do not come into contact with the mold. Therefore,
When the concrete is poured, since the parts other than the lower end surface of the spherical portion 10 are buried, the spacer 1 is hardly exposed on the outer peripheral surface of the completed concrete product, the strength of the concrete product is improved, and the aesthetic appearance is not impaired. Of.

Next, the spacer 1 constructed as described above
A method of holding the reinforcing bar 11 at a predetermined position in the mold will be described with reference to. First, as shown in FIG. 7, an appropriate number of spacers 1 are locked to a part of a reinforcing bar 11 such as a reinforcing bar cage knitted into a predetermined shape.

In this case, the reinforcing bar 11 may be inserted into the reinforcing bar 11 through the reinforcing bar insertion port 6 formed in the lateral direction of the reinforcing bar locking section 2, and the reinforcing bar 11 may be hooked and locked on the locking piece 4. Therefore,
The attachment of the spacer 1 is extremely easy and the workability is good.

Further, since the knitted reinforcing bars 11 are installed on the formwork in a suspended state, the spacers 1 locked to the reinforcing bars 11 in the suspended state are all hung vertically downward due to the weight of the spacer 1 itself. To do. Therefore, rebar 11
When is moved and installed in the mold, the legs 3 are stably placed on the mold, as shown in FIG. Further, since the reinforcing bar 11 is placed on the receiving piece 5 in a stable state,
The holding state of the reinforcing bar 11 becomes extremely accurate.

[0021]

As described above, the spacer according to the present invention comprises a substantially C-shaped rebar locking portion and two pieces of leg portions provided on the lower side of the rebar locking portion. The locking portion is formed of an elastic member, at least two protrusions are formed at a predetermined distance above the inner peripheral surface, and a plurality of spherical portions are formed on the lower end side of the leg portion. In particular, since the reinforcing bar locking portion is formed in a substantially C shape, it can be hooked and locked to the reinforcing bar from the lateral direction of the reinforcing bar locking portion, so that the spacer can be easily attached and the workability is good. It has an excellent effect.

Further, since the spacers locked to the suspended reinforcing bars hang down in the downward direction due to the weight of the spacers themselves, when the reinforcing bars are installed on the formwork, the legs are stably placed, Therefore, there is an excellent effect that the holding state of the reinforcing bar becomes extremely accurate.

Since the reinforcing bar locking portion is formed of an elastic member, even if the reinforcing bar has a large diameter, the reinforcing bar locking portion can be pushed open and locked.

Further, since at least two protrusions are formed at a predetermined distance above the inner peripheral surface of the reinforcing bar locking portion, even when the spacer is locked to the reinforcing bar having a small diameter, this protruding portion is formed. The portion is brought into contact with the outer peripheral surface of the reinforcing bar, so that the spacer has an excellent effect of locking in a stable state without slipping.

Further, by forming a plurality of spherical portions on the lower end side of the leg portion, when the spacer is placed on the mold,
Except for this spherical portion, there is no contact with the mold. Therefore,
When the concrete is poured, since the parts other than the lower end surface of the spherical part are buried, the spacer is barely exposed on the outer peripheral surface of the completed concrete product, the strength of the concrete product is improved, and the aesthetic appearance is not impaired. It has an excellent effect.

The two pieces of leg portions are formed so as to expand downward, and reinforcing ribs are provided in a cross shape between the two leg portions. Since the part is formed so as to spread downward, the spacer has an excellent effect that the spacer can be stably mounted on the mold.

Further, since reinforcing ribs are provided in a cross shape (brace) between both legs, the strength of the legs is improved. Further, since the reinforcing rib is located above the lower end side of the leg portion, the concrete is sufficiently placed below the reinforcing rib, and the strength of the concrete product in the vicinity of the spacer is not reduced. Therefore, various excellent effects of not causing damage to concrete or the like are exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view of a spacer according to the present invention.

FIG. 2 is a front view of a spacer according to the present invention.

FIG. 3 is a left side view of a spacer according to the present invention.

FIG. 4 is a right side view of a spacer according to the present invention.

FIG. 5 is a plan view of a spacer according to the present invention.

FIG. 6 is a bottom view of a spacer according to the present invention.

FIG. 7 is a perspective view showing a state in which a spacer according to the present invention is locked to a suspended reinforcing bar.

FIG. 8 is a perspective view showing a state in which a spacer according to the present invention is locked to a reinforcing bar and installed in a mold.

[Explanation of symbols]

 1 Spacer 2 Reinforcing Bar Locking Part 3 Leg 4 Locking Piece 5 Receiving Piece 6 Reinforcing Bar Insertion Port 7 Projection 8 Reinforcing Rib 9 Base 10 Spherical Part 11 Reinforcing Bar

Claims (2)

[Claims] 1. A substantially C-shaped reinforcing bar locking part and two pieces of leg parts provided on the lower side of the reinforcing bar locking part, wherein the reinforcing bar locking part is formed of an elastic member and A spacer characterized in that at least two protrusions are formed at a predetermined distance above the peripheral surface and a plurality of spherical portions are formed on the lower end side of the leg portion. 2. The two pieces of leg portions are formed so as to widen toward the lower side, and reinforcing ribs are provided in a cross shape between both leg portions. The spacer described in.