JPS598866A - Spacer and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spacer that maintains the distance between reinforcing bars and formwork, and a method for manufacturing the spacer.

Conventionally, spacers of various shapes have been manufactured to maintain the distance between reinforcing bars and formwork, but most of them are made of mortar, plastic, or metal. Spacers made of mortar and plastic deck include donut-shaped spacers and horseshoe-shaped spacers.Doughnut-shaped spacers and horseshoe-shaped spacers require high dimensional accuracy because the space between the reinforcing bar and the formwork is determined by their outer diameter. .

Furthermore, this type of spacer made of glass deck contracts when it comes into contact with salt water such as seawater, resulting in a gap between the spacer and the concrete, through which salt water can penetrate into the concrete. Recent research has revealed that it corrodes the reinforcing steel inside the concrete and reduces the strength of the concrete. In addition, metal spacers are generally susceptible to rust, so rust stains can form over time on exposed concrete surfaces, which is not only extremely unsightly in appearance, but also causes a decrease in concrete strength. Ta.

This invention was proposed in order to solve the above-mentioned conventional problems, and it goes without saying that the distance between the reinforcing bars and the formwork can be maintained reliably and accurately. A spacer and its manufacturing method that eliminates subsequent problems such as reducing concrete strength and causing rust stains on the concrete surface, and reducing production costs through mass production. The purpose is to provide

The spacer according to the present invention has an elastic protrusion protruding into two parts on one side of a base made of mortar or the like, and a concave portion that bulges outward is provided inside the elastic protrusion so as to face each other. .

Furthermore, the method for creating a spacer according to the present invention involves inserting a clip into a reinforcing bar, the clip having a concave portion facing outwardly bulging on the inside of a bifurcated elastic protrusion, and inserting the reinforcing bar between the concave portions. At the same time, the reinforcing bars are placed horizontally at the upper end of the formwork so that the clips are suspended in the formwork, and then the formwork is filled with mortar, and after the mortar has hardened, the reinforcing bars are pulled out and the formwork is removed. It is a method of molding.

Furthermore, when installing the spacer according to this invention,
The reinforcing bars are gripped by the opposing recesses of the elastic protrusions, and the base bottom is brought into contact with the formwork to extend the space between the reinforcing bars and the formwork.

According to the spacer of the present invention, the spacer is attached by gripping the reinforcing bars with the opposing recesses of the elastic protrusions, so there is no possibility that the extra issue will shift or move.
The reinforcing bars can be held securely and accurately.

In addition, if the base is made of a material that does not rust or shrink due to salt, such as mortar, the reinforcing bars inside the concrete will corrode, reducing concrete strength and causing rust stains on the concrete surface. It is possible to solve subsequent problems such as

In addition, the method for creating a spacer according to the present invention has the following advantage: The outer diameter of the base and the slight irregularities on its surface do not pose a problem as a spacer, so that extra labor and time can be omitted. This allows for low costs due to mass production.

Hereinafter, an embodiment 1 illustrating a spacer according to the present invention will be described.A spacer 1 is provided with elastic protrusions 5 and 3 protruding in two on one side of a base 2, and the elastic protrusions 5 and 3 are provided on one side of a base 2. It is manufactured by providing substantially semicircular recesses 4, 4 that bulge outward inside the strips 3, 3 and facing each other.

The base 2 is made of a material such as mortar that does not rust or shrink when exposed to salt water.

The elastic protrusions 6, 6 are formed as holding pieces for a clip 5 made of metal, plastic, etc. 1, and are shaped like leaf springs. The clip 5 is integrated with the base 2 by embedding its proximal end in the pace 2, and elastic protrusions 3, 3 protrude in two from one side of the base 2.

Next, when manufacturing the spacer 1, a plurality of clips 5. Clip the reinforcing bar 61 and the reinforcing bar 65.・・・
Install it by inserting it between the recesses 4 and 4. On the other hand, while assembling the formwork 7 into a long and narrow shape, the formwork 7 is divided into a plurality of partition plates 8. . . . The formwork 7 is divided into sections at equal intervals in the longitudinal direction. Next, clip 5 the reinforcing bar 6 to the upper end of the tension frame 7.
．． ... is the partition plate 8. divided by...
It is installed horizontally so as to hang inside the space 9,... After that, each space 9 of the formwork 7. ... Mortar 1 inside
0 and clip 5. The base ends of ... are buried in the mortar 10. Once the mortar 10 has hardened, the reinforcing bars 6 are pulled out and the formwork 7 is demolded.

The present invention has the above-mentioned configuration, and it goes without saying that the spacer of this invention can maintain the distance between the reinforcing bars and the formwork reliably and accurately, and that it does not corrode the reinforcing bars inside the concrete after installation. , it is possible to eliminate subsequent problems such as a decrease in concrete strength and the occurrence of rust stains on the concrete surface. In addition, the manufacturing cost can be reduced due to the acidity, and manufacturing at a construction site is also possible.

[Brief explanation of the drawing]

1, 2, and 6 are a plan view, a front view, and a side view of the spacer, and FIG. 4 is a sectional view of a formwork showing a method of manufacturing the spacer. 1. Spacer, 2. Pace, 3. Elastic protrusion,
4. Recess, 5. Clip, 6. Rebar, 7. Formwork, 8. Partition plate, 9. Space, 10. Mortar. Fig. 1 Fig. 4 Dingzokuura City Zanzhao (H+58B March 11 [1! 11 Examiner of the Office 1.II ('l table of 1981 Tokusaku No. 117367 No. 2, 8 beats of invention, Spacer and its manufacturing method 3, Relationship with Mi + l Akane and ILf'l (system special board "Applicant 1111) 1 4 Agent 〒1 () 7 width "1℃ and] 1γ (11 <・1,1me #61
No. 115 2 ui: Japan... Explosion +7 (7011!I) +11
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i5, i+li+l instruction llfJ spontaneous amendment Showa (11/11 (Shipping [1) 6, Supplement 11 by 1) increase IJII-Number of inventions to change 7, Supplement 1
Part 1 of the Specification and Drawings 8, Supplement I'? γ Bend 1 on the attached sheet, 1 on the 16th line of the 6th member of the specification... Completely remove the mold. −
After 1, the following sentence 'Jj! :1i8j is written. [Figs. 5 to 7 show modified examples of the spacer 1, and the spacer 1 shown in Fig. 5 and Fig. 6 has a base 2 formed in a hemispherical shape. Spacer 1 and base 2 shown in the figure are formed into a cylindrical shape.
FIG. 8 shows a method of manufacturing spacer 1 shown in FIGS. 5 and 6. 2, 1... on page 7, line 6 of the specification. "Figures 5 to 7 show modified examples of the spacer, and Figure 5 is a plan view of the spacer; Figures 6 and 7 are: Figures 5, 6, 7, and 8 are added to the 6 drawings. do. 5th [Buto 1\6[・〈1 7th (1 1-shot j'kor city +1.'+'i 1'H+'lFl い入i\\ Show I11517+1'1.'+191j 11th'i: (
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'lselfNovember(++iQF!A#!■ 1. Name of the invention - and its manufacturing method 2. Claims (1) An elastic protrusion protrudes into two parts from one side of the base. A spacer characterized in that four parts are provided facing each other and bulge outward on the inner side of the elastic protrusion. Clips with bulging recesses facing each other are attached to the reinforcing bars by pushing the reinforcing bars through between the four parts, and the reinforcing bars are installed horizontally at the upper end of the formwork so as to be suspended within the OfI clip frame. Then, the method for manufacturing a spacer is characterized in that the mold is filled with mortar, the reinforcing bars are pulled out after forming the mortar, and the mold is removed from the mold. 3. Detailed Description of the Invention This invention comprises: The present invention relates to a spacer that maintains the distance between reinforcing bars and formwork, and a method for manufacturing the spacer.
C1 is manufactured in various shapes, but most of them are made from mortar, glass book, or gold 6. First, there is a donut-shaped spacer and a horseshoe-shaped spacer made of mortar and glass.Doughnut-shaped spacers and horseshoe-shaped spacers are used to reduce the space between reinforcing bars and formwork depending on their diameter. A high degree of dimensional accuracy was required to determine the dimensional accuracy of the spacer.Furthermore, this type of substrate made of glass shrinks in areas that come into contact with salt water such as seawater, resulting in the spacer and the concrete. There is a gap between
Recent investigations have revealed that water seeps into the concrete through these gaps, corroding the reinforcing bars inside the concrete and reducing the strength of the concrete. In addition, metal spacers generally tend to rust easily, so over the years, rust stains appear on concrete surfaces exposed to the outside, making them extremely unsightly in appearance. It was also the cause. This invention was proposed in order to solve the problems of the conventional method.It goes without saying that the distance between the reinforcing bars and the formwork can be maintained reliably and accurately, and after installation, the inside of the concrete can be Eliminates late-onset b'Ei, such as corrosion of reinforcing bars and reduction of concrete strength, and stains caused by 1H corrosion on the concrete surface. It is an object of the present invention to provide a method for manufacturing a spacer that can increase its value. The spacer according to the present invention is provided with a force protrusion 911 protruding into two branches on one side of a base made of mortar or the like, and a recess that bulges out inside and outward of the elastic protrusion is placed opposite to the elastic protrusion. It is made by setting t. Furthermore, the method for manufacturing a spacer according to the present invention has two parts: 1. Ll, with the four outwardly bulging parts facing each other inside the elastic protrusion, k) - is attached to the reinforcing bar by pushing the reinforcing bar between the convex parts, and attaching the clip to the reinforcing bar. The clip is placed horizontally at the upper end of the formwork so that it hangs within the formwork, and then the clip is placed horizontally at the upper end of the formwork. In addition, when installing the spacer according to the present invention, the reinforcing bars are gripped by the four opposing parts of the elastic protrusions, and the base IE (the surface part is brought into contact with the formwork to attach the reinforcing bars to the formwork). Lost in between (
I can see it. According to the spacer of the present invention, the subelements are attached by gripping the reinforcing bars with the opposing recesses of the elastic protrusions, so the attachment is possible without the need for skewers that may be displaced or moved. The rebar can be held securely and accurately. In addition, the base is rusted, and the material shrinks due to rust.For example: Formation deviation due to mortar, etc. causes the reinforcing bars inside the concrete to eat away, and the strength of the concrete decreases due to the force caused by rust on the concrete surface. It is possible to solve subsequent problems such as the appearance of stains.By the method of manufacturing the smooth double length according to the present invention, the outer diameter of the base and slight irregularities on its surface can be eliminated. Since it is not a problem as a base, the extra effort and
III! The spacer 1 can be omitted and the cost can be reduced through mass production.Hereinafter, a spacer according to the present invention will be explained with reference to an embodiment illustrating the spacer 1.The spacer 1 has an elastic protrusion 3. It is manufactured by protruding into two forks and providing substantially semicircular four portions 4.4 that bulge outward inside the elastic protrusion 3.3 and facing each other. The base 2 is made of a material such as mortar that will not shrink when exposed to rusted brine. The elastic protrusions 3, 3 are formed as clamping pieces of a clip 5 made of metal, plastic, etc., and serve as temporary springs. Then, insert the proximal end of the clip 5 into the base 2! 11
By installing the base 2, the elastic protrusions 3, 3 become -g+ of the base 2! It protrudes into two parts from the first part. Next, when making Jv of spacer-1, 7') Jl, multiple clips 5. Clip the reinforcing bar 6 to the reinforcing bar 6 5. . . . several cases by pushing it through between the recesses 4 and 4. - Force, formwork 7'tg: While assembling the formwork 7 into a slender piece, the formwork 7 is divided into a plurality of partition plates 8. . . . The p formwork 7 is divided into sections at equal intervals in the longitudinal direction. Next, clip 5 the reinforcing bar 6 to the upper end of the formwork 7. ... is the partition plate 8.・
A space section 9° divided by...
・So that there is a hanging frame inside (yellow installation).After that, formwork 7
Each space part 9. . . . Fill the inside with mortar 10, and attach the clip 5. The base end of ... is buried in mortar lO. When the mortar 10 hardens 7, pull the reinforcing bar 6 f
! ! It is punched out and the formwork 7 is removed from the mold. Figure 5 to Figure 12 and Figure 11 show the deformation of Subaree 1 shown in Figure 5 and Figure 6.
1-L base 2 is formed into a hemispherical shape, and the spacer-1-1 and base 2 shown in Fig. m7 are formed into a cylindrical shape. FIG. 8 shows a method of manufacturing sube length-1 shown in FIG. Pd2 and FIG. 6. Figures f1N9 to 12 show the base 2 formed into a columnar shape. The present invention does not have the above-described structure.It goes without saying that the spader according to the present invention can reliably and accurately maintain the distance between the reinforcing bars and the formwork. It is possible to eliminate subsequent problems such as a decrease in concrete strength and rust stains on the concrete surface. Further, when manufacturing C, the cost can be reduced by mass production, and it can also be manufactured at a construction site. 4. Brief explanation of the drawings Figures 1, 2 and 6 are plan views of the Svets °-;
Is the same drawing, side view, and Figure 4 okay? Figures 5 to 12 show a modification 911 of the L1 spacer, Figure 5 is a plan view of the short length, and Figures 6 and 7 are Fig. 8 is a cross-sectional view of the steel formwork, Fig. 9 and Fig. 11 are the same drawings of the suberly as shown in Fig. 11N2H, and Fig. 10 and Fig. 12 are other fIjl diagrams. 1...Sube ν'=2...Base 3.
...Resilience! v! 4... Concavity 5...
... Clip 6 ... Reinforcing bar 7 ... Formwork 8 ... Partition plate 9 ... Empty 011 part 10.
...Mortar No. 1 Kuchikawa 20 Figure 3 No. 5 ill No. 6 Mortar No. 714 No. 91. i1Figure 10,,i,IIt'Xlfalse'i12i pull

Claims (1)

[Scope of Claims] 1. An elastic protrusion is provided on one side of the base so as to protrude into two branches, and a concave portion that bulges outward is provided inside the elastic protrusion so as to face each other. A spacer characterized by: 2. Attach a clip to the reinforcing bar by inserting the reinforcing bar between the recesses, and attach the clip to the reinforcing bar by inserting the reinforcing bar between the recesses and attaching the clip to the reinforcing bar. The spacer is characterized in that the clip is installed horizontally so as to be suspended within the formwork, and then the formwork is filled with mortar, and after the mortar hardens, the reinforcing bars are pulled out and the formwork is removed. Production method.