JPH0644859U - Spacer for bar arrangement - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the efficiency of slab reinforcement and reduce the construction cost. [Structure] L-shaped side frames 1 provided on both sides, a support member 2 for an upper end streak extending to an upper part between the two side frames, and a lower end streak extending to a lower part between the two side frames and arranged at a horizontal interval. Support member 3 for supporting the upper end streaks on the upper end bar supporting members, and supporting the lower end streaks on the lower end bar supporting members.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a reinforcing bar spacer used when constructing a concrete slab.

[0002]

[Prior art]

 Conventionally, when constructing concrete slabs, upper and lower bar reinforcements are arranged as slab reinforcement above the formwork. The height (interval) of these slab rebars from the formwork is determined according to the slab thickness, and spacers are used to secure the prescribed height.

[0003]

[Problems to be solved by the device]

 According to the conventional spacer, two types of spacers are used, one for the upper end bar and the other for the lower end bar. Therefore, in addition to the construction cost of the slab, various spacers are installed at different locations. It took a lot of time to install the spacer, which was an obstacle to improving the efficiency of bar arrangement.

An object of this invention is to improve the efficiency of slab reinforcement and to reduce the construction cost.

[0005]

[Means for Solving the Problems]

 The reinforcing bar spacer of the present invention comprises side frames provided on both sides, and a supporting member for the upper end bar and a supporting member for the lower end bar which are arranged between the both side frames. The supporting member for the lower end streak is arranged below the supporting member for the upper end streak by a predetermined distance. As the supporting member, an appropriate member such as round steel or a long plate is used. The side frame is provided with a long side portion and a short side portion as installation portions, holds the end portion of the upper end muscle supporting member on one of the long side portion side and the short side portion side, and on the other side. By holding the end portion of the lower end support member, the same spacer can be used for construction with different slab thicknesses.

[0006]

[Action]

 The upper end bar and the lower end bar can be simultaneously supported at the same position.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The spacer according to the present invention is composed of side frames 1 and 1 arranged on both sides as shown in FIG. 1, and a support member 2 for the upper end streak and a support member 3, 3 for the lower end streak which are provided between the side frames. It will be.

Each side frame 1 is L-shaped having a long side portion 11 and a short side portion 12, and the material thereof is an iron plate. Each side frame 1 is formed by bending a rib having a predetermined width in the thickness direction by press working so as to be self-supporting, and the rib is provided with nail holes 13 at intervals.

Round steel is used as the support member 2 for the upper end reinforcement, and both ends of the support member for the upper end reinforcement are fixed to the upper ends of the short sides of the side frame 1. The support member 2 for the upper end bar is for mounting the upper end bar of the slab on the upper part thereof.

The lower-end streak support member 3 is made of the same material as the upper-end streak support member 2, and is installed in parallel to the front end portion and the rear end portion side of the long side portion 11 of the side frame 1. The lower end stirrup supporting member 3 is for mounting the lower end streak of the slab on the upper part thereof. Two supporting members for the lower end streak are horizontally arranged with a space in the long side portion 11, and the load of the lower end streak placed on these is two points from the upper side to the lower side. It will be pushed by and prevent the spacer from falling over when the upper end bar is arranged.

Next, the usage method will be described. First, the spacer is installed on the concrete panel P laid as shown in FIG. 2 with the long side portion 11 facing downward. Then, the lower end streak S2 is placed on the lower end streak support members 3, 3. At this time, as described above, the load of the lower end streak S2 presses the long side portion 11 at two points, and the spacer is prevented from falling when the upper end streak is laid. Then, the upper end streak S1 is placed on the upper end streak support member 2. In this way, the same spacer simultaneously secures the upper end streak S1 and the lower end streak S2 at predetermined intervals H and H1 from the concrete panel P, respectively. After that, when concrete C is placed on the concrete panel P, a slab having a predetermined thickness is constructed.

When the slab thickness to be constructed needs to be larger than the slab thickness of the example shown in FIG. 2, the spacer is used as shown in FIG. That is, when the long side portion 11 is erected with the short side portion 12 of the side frame 1 facing downward, the height H1 of the upper end streak S1 can be made larger than that in the above-described use example.

As described above, either the long side portion 11 or the short side portion 12 of the side frame 1 is selected as the installation portion to correspond to two types of slab thickness.

When round steel is used as the supporting members 2 and 3 for the slab reinforcing bars, it is natural that the supporting bars 2 and 3 are thick enough not to be deformed by the reinforcing bar load. Also, when using round steel with a small diameter, trusses should be placed between the support members for reinforcement.

As shown by the chain line in FIG. 4, when the lath 4 is obliquely stretched across the tip portions of the long side portion 11 and the short side portion 12, it becomes a concrete stop for the concrete joint portion.

Another example is shown in FIG. In this example, the side frame 1a is formed in a right triangle, for example, and the long side portion 11a and the short side portion 12a are provided as installation portions. The upper frame upper support member 2 and the lower frame support member 3 of the lower side frame 1a are respectively held.

Also in this example, the height of the upper end streak S1 can be changed by appropriately selecting the long side portion 11a and the short side portion 12a according to the slab thickness and using them as the installation portions.

[0018]

[Effect of device]

 According to this invention, since the same spacer can support both the upper and lower streaks, it is possible to save the labor of disposing the spacers separately as in the conventional method, and to improve the efficiency of slub construction. Since the spacer for each type is not required, the construction cost can be reduced. Even if the same spacer is used, the side frames have long side portions and short side portions, so that different slab thicknesses can be accommodated.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of use of this device.

FIG. 3 is a sectional view showing another example of use of the present invention.

FIG. 4 is a sectional view showing another embodiment of the present invention.

FIG. 5 is a sectional view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Side Frame 1a Side Frame 2 Upper End Supporting Member 3 Lower End Supporting Member S1 Upper End S2 Lower End 11 Long Side 11a Long Side 12 Short Side 12a Short Side

Claims (2)

[Scope of utility model registration request] 1. A side frame provided on both sides, and a support member for the upper end streak and a support member for the lower end streak extending between the both frames, wherein the lower end streak support member is the upper end streak support member. A reinforcing bar spacer, which is arranged below a predetermined distance. 2. The side frame according to claim 1, comprising a long side portion and a short side portion as an installation portion, and one of the long side portion side and the short side portion side is a support member for an upper end streak. Is held, and the other end is held by the other end of the support member for the lower end reinforcement.