JPH0819732B2 - Spacer for rebar - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for setting an interval between a pair of reinforcing bars in a slab or a wall of a reinforced concrete structure and an interval for a cover thickness.

[0002]

2. Description of the Related Art Various types of spacers for reinforcing bars, particularly spacers for slab reinforcing bars, have been known.
For example, a typical example is shown in FIG. 10, where (a) is for the upper slab muscle and (b) is for the lower slab muscle. As can be seen, the conventional spacer is a single type, that is, one spacer is used for each supporting point, and the upper slab muscle and the lower slab muscle are used separately. ing.

For this reason, the installation work is difficult, and when there is no leeway from the reinforcing bar reinforcement to the concrete placing, the spacer arrangement as designed may not always be secured, and during the work. There is a risk that it will fall over, and if concrete is placed while it is still falling, there is a problem that the stability of the quality of the slab may eventually be impaired.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a spacer for slab muscles and a spacer for wall muscles which are excellent in workability such as installation and can stably exhibit a spacer function. Has an aim.

[0005]

A spacer for a slab muscle according to the present invention comprises an upper lateral muscle supporting an upper slab muscle, a lower lateral muscle supporting a lower slab muscle, and a plurality of upper lateral muscles and a lower lateral muscle connecting the lower lateral muscles. A connecting muscle, and a leg muscle protruding from the lower lateral muscle in a length according to the required cover thickness of the inferior slab, and the upper lateral muscle is formed to have a plurality of zigzag continuous sides. In addition, the lower lateral muscle is intermittently formed corresponding to each side of at least both ends of the upper lateral muscle, and each end of the lower lateral muscle is projected a predetermined length from the connecting muscle for supporting the lower slab muscle. ing.

The spacer for the slab muscle has a shape in which the upper lateral streaks are continuous in a zigzag manner, and the lower lateral streaks are also provided in correspondence therewith, so that the spacer becomes a zigzag shape as a whole and the installation state is stable. It is possible to simultaneously support multiple locations at the same time. As a result, the workability can be improved, and the required intervals can be reliably and stably provided to the upper and lower slab muscles, that is, the spacer function can be stably exhibited. The use condition is as follows.

[0007] The bottom plate of the formwork is arranged so that the tips of the leg muscles are in contact with each other, and in this state, the lower slab muscles are placed on the lower lateral muscles or supported by bundling, while the upper slab muscles support the upper lateral muscles. The space between the lower slab muscle and the upper slab muscle is given according to the distance between the lower lateral muscle and the upper lateral muscle, and the protruding length of the leg muscle and the upper lateral muscle and the formwork. The upper and lower cover thicknesses can be definitely set according to the distance from the upper end. In the present specification, the term "zigzag" or "zigzag shape" is not limited to a Z-shaped bent state, and is also used to mean a curved bent state such as an S shape. There is.

Regarding the spacer for the slab muscle as described above, the workability can be improved by integrating the connecting muscle and the leg muscle.

Further, in the spacer for slab muscle as described above, it is more preferable that the upper lateral bar is formed in a three-sided structure and the lower lateral bar is provided corresponding to the left and right sides of the upper lateral bar. That is, according to this structure, the spacer can be incorporated into the pre-arranged lower slab stirrer in a one-touch manner, and the installability is significantly improved.

Another spacer for a slab muscle according to the present invention is an upper lateral muscle supporting an upper slab muscle, a lower lateral muscle supporting a lower slab muscle, a plurality of connecting muscles connecting the upper lateral muscle and the lower lateral muscle, and It is equipped with leg muscles protruding from the lower lateral muscle in a length according to the required cover thickness of the lower slab muscle, and the upper lateral muscle and the lower lateral muscle are formed to have a plurality of zigzag continuous sides. There is.

The spacer for the slab muscle has a zigzag shape in the upper and lower transverse muscles, so that the stability of the installed state can be realized as in the spacer for the slab muscle, and at the same time at a plurality of locations. As a result, it is possible to support, and as a result, it is possible to improve workability, and it is possible to reliably and stably provide the necessary intervals to the upper and lower slab muscles. The state of use is basically the same as the spacer for the slab muscle.

Therefore, also in the spacer for the slab muscle, the workability can be improved by integrating the connecting muscle and the leg muscle. Then, particularly for the spacer for the slab muscle in which both the upper and lower lateral muscles have a zigzag shape, the connecting muscle is formed into an M-shaped bent shape, and one end of the spacer is formed into a leg muscle. It is possible to improve the compressive strength and the efficiency of connecting the connecting muscles to the parallel muscles.

Furthermore, in the present invention, the basic structure of the spacer for each slab muscle as described above is applied to the wall muscle, and a plurality of parallel stripes and zigzag-shaped parallel stripes having the same shape are provided. Provided is a spacer for wall muscles, which is provided with connecting muscles that are connected at a plurality of positions at a predetermined arrangement interval.

Similar to the spacer for the slab muscle, the spacer for the wall muscle improves the workability and improves the spacer function by stabilizing the installation state by the zigzag bending structure of the parallel muscles and simultaneously supporting at a plurality of locations. The stability can be improved.

Also for such a wall spacer,
By forming the connecting bar into an M-shaped or N-shaped bent shape, it is possible to improve the compression strength and the efficiency of connection processing.

[0016]

Embodiments of the present invention will be described below. First Embodiment of Spacer for Slab Muscle (FIGS. 1 and 2) The spacer 21 for slab muscle in this example has a zigzag shape having three sides 22a, 22b, 22c as shown in FIGS. 1 and 2. On the left and right sides 22a and 22c of the upper lateral bar 22 bent in a different shape, straight lower lateral bars 23 and 23, which are slightly shorter than the sides 22a and 22c, are also connected to the two linear connecting bars 24, 24 are connected in parallel with each other at a predetermined distance H, and the central side 22b of the upper lateral line 22 is connected.
Intermediate connecting lateral reinforcement 2 with three connecting reinforcements 24, 24, 24
5 is connected at a predetermined interval h, and the lower part of each connecting bar 24, 24, ...
The leg muscles 27, 2 are made to project from the level of 3 with a length L.
7, ...

The spacer 21 is used as follows. That is, as shown in FIG. 1, after finishing the arrangement of the sub-slab muscle Sb, the spacer 21 is shaped so that the central side 22b of the upper lateral rib 22 is parallel to the longitudinal direction of the lattice in the sub-slab muscle Sb. It is installed on the bottom plate B of the frame F (Fig. 2). In such an installed state, the length of the lower transverse muscles 23, 23 of the spacer 21 is adapted to correspond to the size of the lattice of the sub-slab muscle Sb, that is, the arrangement distance between the main and sub muscles of the sub-slab muscle Sb. , The lower lateral ribs 23 protruding from the connecting muscles 24, 24 at the left and right ends for supporting the lower slab muscle Sb by inserting them while properly twisting.
The main muscles and vice muscles of the sub-slab muscle Sb are naturally placed on the respective left and right end portions of 23.

In this way, the required number of spacers 21
Are installed on the entire lower slab muscle Sb at predetermined intervals, and when this is completed, the upper slab muscle Sa (FIG. 2) is placed on the upper lateral muscle 22 of each spacer 21 to arrange the muscles. As a result, leg muscle 2
The covering thickness T according to the length L of 7, 27, ... Is given to the lower slab reinforcement Sb, and the covering thickness according to the distance from the upper end of the upper slab reinforcement Sa on the upper lateral reinforcement 22 to the upper end of the form F. T will be given to the slab upper muscle Sa.

Here, the intermediate lateral muscle 25 is the connecting muscles 24, 2
It is for reinforcement of Nos. 4 and 24, and is positioned above the inferior slab muscle Sb and does not work to support the infraslab muscle Sb, but it is required to be supported only by the lateral transverse muscles 23, 23 on both left and right sides You can fully exert your power.

A second embodiment of the spacer for the slab muscle (see FIG. 3).
(FIG. 5) As shown in FIG. 3, the spacer 1 for the slab muscle in this example has four M-shaped upper and lower lateral muscles 2a and 2b which are parallel to each other with a predetermined distance H therebetween. It is formed by connecting the connecting lines 3, 3, .... Each transverse line 2a,
2b are all the same shape, and are bent in a zigzag shape having a "-"-shaped vertex at three points, and one M-shaped connecting bar 3 is provided for each bent side, and the bent portions 3m, 3m at the three points.
m and 3 m are connected by welding.
Further, the lower end portion of each connecting bar 3 has a length L from the lower lateral bar 2b.
It is made to project and it is said to be leg muscles 4, 4, ....

The spacer 1 is used as follows. That is, as shown in FIGS. 4 and 5, the sub-slab muscle S
After finishing the reinforcement of b, the leg muscles 4, 4 are attached to the bottom plate B of the form F.
Place it with the tip of …… abutting. Next, the upper slab muscle Sa is arranged on the spacer 1. Then, after adjusting the position of the spacer 1 to position it in an optimal supporting state (an example thereof is shown in FIG. 5), the lower slab muscle Sb is lifted and hung up in a state of being hung on the lower lateral muscle 2b. As a result, the first
As in the case of the embodiment, the required covering thickness T is given to the slab lower muscle Sb and the slab upper muscle Sa.

In this embodiment, the lower slab muscle Sb is hung on the lower lateral muscle 2b, but in addition to this, the lower slab muscle Sb may be placed on the lower lateral muscle 2b. . In this case, the lower slab muscle S on the lower lateral muscle 2b
A notch portion for passing b is appropriately formed.
Moreover, since the vertical positional relationship of the sub-slab muscles Sb changes, the length of the leg muscles 4 is adjusted accordingly.

Further, in this example, the connecting bar 3 is formed in an M shape, but this is for the purpose of efficiently connecting the connecting bar and for facilitating to secure the compressive strength required for the slab muscle. However, it does not necessarily have to be an M-shaped structure, and may be, for example, a simple linear shape.

[0024]Third embodiment of spacer for slab muscle (Fig.
6) In this example, the height adjustment cap 5 is attached to the leg muscle 4.
In this example, the cover thickness T can be adjusted by
is there.

[0025]Fourth embodiment of spacer for slab muscle (Fig.
7) In this example, an inverted M-shaped connecting bar 6 is used.
The folds 6m and 6m project as V-shaped leg muscles 7 and 7.
Is being done.

Example of Spacer for Wall Muscle (FIG. 8) The spacer 10 for wall muscle of this example is as shown in FIG.
Basically, it is the same as the spacer for the slab muscle, and the two parallel ribs 11, 11 and the four M-shaped connections are formed in a zigzag bent shape like the horizontal ribs 2a, 2b of the second embodiment. .., but the one corresponding to the leg muscle 4 in the spacer 1 for the slab muscle is not provided.

To use this spacer 10, first, one wall muscle Wa is arranged, and then the spacer 1 is attached to this wall muscle Wa.
0 is fixed, then the other wall muscle Wb is arranged, and then the form M is formed. The distance between the form M and the two wall reinforcements Wa and Wb, that is, the cover thickness T, is the parallel line 11 of the spacer 10 in this example in which the leg line for setting the cover thickness is not provided.
It is provided by an auxiliary member 13 made of, for example, plastic which is attached at an appropriate interval in advance or each time.

The reason why the auxiliary member 13 is used in this way is, of course, that it is not necessary to apply an excessively large compressive load in the case of wall reinforcement and that it is as light as possible. Accordingly, leg muscles for setting the cover thickness may be provided. Further, since the compressive strength is relatively small in the case of the wall muscle, the M-shaped connecting muscle 12
Alternatively, N-shaped connecting ribs 14 as shown in FIG. 9 may be used. In this example, the leg muscles 15 are formed on both sides by projecting both ends of the connecting ribs 14.

[0029]

As described above, the spacer according to the present invention has a structure having horizontal or parallel streaks in a zigzag shape, and can support a plurality of locations at the same time. Is stable to
The efficiency of arranging work can be improved, and the necessary cover thickness for slab muscles and wall muscles can be given reliably and stably.
It can greatly contribute to labor saving and quality improvement of reinforced concrete structures.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a spacer for a slab muscle according to a first embodiment of the present invention is installed on a lower slab muscle.

FIG. 2 is a side view of the spacer shown in FIG.

FIG. 3 is a perspective view of a spacer for a slab muscle according to a second embodiment of the present invention.

FIG. 4 is a side view showing a usage state of the spacer of FIG.

5 is a plan view seen from the X direction of the arrow in FIG. 4. FIG.

FIG. 6 is a side view of a spacer for slab muscles according to a third embodiment of the present invention, which is equivalent to FIG.

FIG. 7 is a perspective view of a spacer for a slab muscle according to a fourth embodiment of the present invention.

FIG. 8 is a side view showing a usage state of a spacer for wall muscle according to the present invention.

FIG. 9 is a partial perspective view of another embodiment of the spacer for wall muscle according to the present invention.

FIG. 10 is a perspective view of a conventional spacer for a slab muscle.

[Explanation of symbols]

 1 Spacer for slab muscle 2a Upper lateral muscle 2b Lower lateral muscle 3 Connecting muscle 4 Leg muscle 10 Spacer for wall muscle 11 Parallel muscle 12 Connecting muscle 21 Spacer for slab muscle 22 Upper lateral muscle 22a Side 22b Side 22c Side 23 Lower side Lateral muscle 24 Connection muscle 27 Leg muscle Sa Slab upper muscle Sb Lower slab muscle

Claims (9)

[Claims] 1. A spacer for a slab muscle for maintaining a predetermined vertical distance between an upper slab muscle and a lower slab muscle and for maintaining a predetermined height of the lower slab muscle from a form bottom for a required cover thickness. In, the upper lateral muscle supporting the upper slab muscle,
The lower lateral muscles that support the subslab muscles, multiple connecting muscles that connect these upper lateral muscles and lower lateral muscles, and the leg muscles that project from the lower lateral muscles with a length that corresponds to the required cover thickness of the subslab muscles. The upper lateral muscle is formed to have a plurality of zigzag continuous sides, and the lower lateral muscle is intermittently formed corresponding to each side of at least both ends of the upper lateral muscle. A spacer for a slab muscle, wherein an end of the slab muscle is configured to project from the connecting muscle for a predetermined length of the lower slab muscle supporting portion. 2. The spacer for slab muscles according to claim 1, wherein the connecting muscles and the leg muscles are integrated. 3. The upper lateral muscle has three sides, and the lower lateral muscle is provided so as to correspond to the left and right sides of the upper lateral muscle. Spacer for slab muscle. 4. A spacer for a slab muscle for maintaining a predetermined vertical distance between the upper slab muscle and the lower slab muscle and for maintaining a predetermined height from the bottom of the formwork of the lower slab muscle for a necessary cover thickness. In, the upper lateral muscle supporting the upper slab muscle,
The lower lateral muscles that support the subslab muscles, multiple connecting muscles that connect these upper lateral muscles and lower lateral muscles, and the leg muscles that project from the lower lateral muscles with a length that corresponds to the required cover thickness of the subslab muscles. A spacer for slab muscles, characterized in that the upper transverse line and the lower transverse line are both formed so as to have a plurality of sides that are continuous in a zigzag manner. 5. The spacer for slab muscles according to claim 4, wherein the connecting muscles and the leg muscles are integrated. 6. The spacer for a slab muscle according to claim 5, wherein the connecting bar has an M-shaped bent shape, and one end of the connecting bar has a leg section. 7. A spacer for wall reinforcement, which comprises a plurality of zigzag bent parallel stripes of the same shape and connecting stripes connecting the parallel stripes at a plurality of locations at a predetermined arrangement interval. 8. The spacer for wall muscle according to claim 7, wherein the connecting bar has an M-shaped bent shape. 9. The spacer for wall muscle according to claim 7, wherein the connecting bar has an N-shaped bent shape.