JP3016714B2 - Circular form clamping band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tightening band suitable for assembling and fixing a circular form panel or the like used when constructing a cylindrical or semicircular concrete structure.

[0002]

2. Description of the Related Art Conventionally, when constructing a columnar concrete structure on site, instead of assembling the formwork using a steel formwork panel having a bolting flange or the like or a dedicated auxiliary member. , A plurality of form panels formed in an arc shape from wood (mainly plywood) are combined into a cylindrical shape,
In some cases, a scaffold chain wound around the chain is tightened to assemble and fix the formwork.

[0003]

However, the method of assembling and fixing a cylindrical form using this scaffold chain can flexibly cope with various shapes of the chain, and also does not use bolts or the like for wooden construction. There is an advantage that the formwork panel can be easily assembled and fixed on site, but this scaffolding chain is an easily deformable link chain formed by connecting bar steel into an elliptical shape. However, when casting concrete with a large-volume formwork being formed, the chain is elongated by the pressure of the concrete, and there is a problem that the formwork cannot be firmly fixed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce the elongation and flexibly cope with various shapes such as a scaffold chain. Another object of the present invention is to provide a circular form clamping band which can be easily adjusted in length depending on the size of the form and can be easily set.

Another object of the present invention is to provide a circular form tightening band which can be easily maintained and stored after use without being formed at the time of tightening or being bent at the corner of the crosspiece.

Another object of the present invention is to provide a circular form tightening band which can easily equalize the tightening state of all the stages when the tightening band is used in a plurality of stages.

As another object, when a relatively large form is fastened, the circular form is not damaged even when a large tensile load is applied to the joint of the circular form tightening band. It is to provide a tightening band.

[0008]

According to a first aspect of the present invention, there is provided a circular form clamping band according to the present invention, wherein bolts are inserted between upright portions opposed to each other to draw in the direction of pulling. A pair of fasteners to be tightened with nuts; a starting band surface is formed on each of the mounting portions of the fasteners, and a bolt hole is provided at a predetermined pitch on at least one band surface; a pair of band body and to be engaged detachably bolted in a state where each other band surface was superposed; circular mold clamping band odor with
And the tip of the one band body on the side of the fastening fitting.
Is provided so as to protrude from the fastener, and the protrusion of the band main body is provided.
The scale at the protruding part is within the range of the length of the bolt inserted through the fastener.
The configuration provided in the enclosure was adopted .

According to the second aspect of the present invention, there is provided the circular form clamping band according to the first aspect.
The pair of fastening fittings is attached to one end of the band with the fastening fitting.
The strong metal fittings are fixed, and the elevations of the fastening metal fittings and the reinforcing metal fittings are heavy.
Bolts are fixed to the overlapped uprights.
Fastening part on the bolt fixing side; fastening fitting at one end of the band
The reinforcement bracket is fixed, and the fastening bracket and the elevation of the reinforcement bracket are
It is overlapped, and the bolted
And a nut receiving side fastening portion having a notch .

[0010]

According to the circular form tightening band of the first aspect, in the form work, by pulling the fasteners together with the bolts and nuts, the band body tightens and fixes the form panel. Provision of multiple steps on a cylindrical form
Can be confirmed by the scale of the fastener
Therefore, by setting the same tightening interval for all stages,
To form a formwork with excellent accuracy and strength.
Can be achieved.

[0011] In the circular form clamping band according to the second aspect, the pulling bolt is pulled from the upper end of the upright portion of the other fastener.
You can insert and lock the nut in the set groove,
Easy to fix the formwork without removing the nut
Can be. In addition, a reinforcing bracket is attached to the fastening bracket.
The fasteners are damaged even when a large tensile load is applied.
Does not hurt. Therefore, a large formwork is tightened and fixed
It can be used safely even if you do. Also usually
Book with a round formwork tightening band compared to when used for formwork
It is also possible to reduce the number.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a circular form clamping band of the first embodiment, and FIG. 2 is an explanatory view showing a use state of the same.

First, the configuration of the embodiment will be described. The circular form clamping band A of the present embodiment includes a pair of band bodies 1a, 1
b, a pair of fastening fittings 2a and 2b, a connecting fitting 3, and a scale display unit 4 as main components.

The band bodies 1a and 1b are connected to both ends 1
1 and 12 are used by being connected to each other, each of which is formed of a stainless steel strip for a spring. In this embodiment, the width is 50 mm, the thickness is 1.2 mm, and the tension is 2.5 to 3.0.
t / one piece is used. And the diameter 550
Both band body 1 so that it can correspond to 850 mm formwork
Both a and 1b have a length of approximately 1500 mm, and the band surfaces 13 and 14 are provided with an end opening of 50 mm from the end side at a pitch of 150 mm on the band body 1a and a pitch of 100 mm on the band body 1b. A bolt hole 15 is provided.

The fastening fittings 2a and 2b are designed so that the mold 5 can be fastened and fixed with a single wrench. Of these, the fastening fitting 2a is formed in a substantially L-shape, and the bottom surface thereof is formed as described above. The band main body 1a is fixed to the starting end 16 with a bolt 18. A set bolt 20 longer than the pitch of the bolt hole 15 is inserted into the upright surface portion 19, and the head thereof is fixed at one end side of an upper backing plate 6a for fixing the fastener 2a and the band body 1a in a sandwiched state. It is stopped by. In the figure, S is an adjustment margin (tightening margin) at the time of tightening, 21 is a nut used at the time of tightening the set bolt 20, 21a is a washer also having a standing edge for reinforcement, and the nut 21 and the washer 21a are It can be used while attached to the set bolt 20.

The fastening fitting 2b is formed in a substantially L-shape, and the bottom surface is located at the starting end 17 of the band body 1b and substantially 200 mm behind the starting end.
The band body 1b is fixed by bolts 22 while holding the band body 1b together with the band body b. A set groove 24 into which the set bolt 20 can be directly inserted from above is provided in the upright surface portion 23. In the figure, reference numeral 24a denotes reinforcement of the groove. Reference numeral 6c denotes a bolt for fastening and fixing the backing reinforcing plate 6b and the band body 1b.

The connection fitting 3 is connected to the band main body 1a,
1b are connected and integrated into one body, a tightening surface portion 25 having the same width as the band main body, a bolt hole 26 formed in the tightening surface portion 25, and a standing edge portion formed on both sides of the tightening surface portion 25. 27. In the figure, 28 is a bolt, 29 is a round washer attached from above the band surface, and 30 is a nut.

The scale display section 4 includes the fastening fittings 2a,
A set graduation 31 at intervals of 5 mm is provided on the band surface at the start end side of the band main body 1b to know the displacement amount at the interval of 2b.

Next, the operation of the embodiment will be described. The circular form clamping band A having the above-described configuration is used for the band main bodies 1a and 1b.
The bolts 28 are inserted through the bolts 28 with the connecting fittings 3 applied to the lower surfaces thereof, and the upper surfaces thereof are tightened with round washers 29 and nuts 30. In this state, the two band bodies 1a and 1b are in a state of being fixed in a straight line because both edges are sandwiched by the upright edges 27 and 27 of the connection fitting 3 in an overlapping state.

Next, when the mold is fastened and fixed, the mold 5 formed into a cylindrical shape by combining a plurality of arc-shaped mold panels is provided.
The crosspiece 6 is appropriately arranged, and the band body is wound thereon. At this time, the two fastening fittings 2a and 2b are arranged avoiding the crosspiece and the set bolt 20 is set to the setting groove 24 on the fastening fitting 2b side.
And then tighten the washer 21a with the nut 21. In this case, since the diameter of the mold frame 5 is known from the beginning, the terminal side connection positions of the band main bodies 1a and 1b are adjusted in advance so that the adjustment margin remains in the set bolt 20. In this band adjustment, the band body 1a is 150 m
Since the bolt holes are provided in the m-pitch and the band main body 1b at the pitch of 100 mm, the fine adjustment of the pitch of 50 mm is possible by a combination thereof.

The circular form clamping band A is
A plurality of stages are set at a predetermined pitch in consideration of the size and height of the mold. In this case, each of the tightening bands A, A,.
Is tightened by the set scale 31 while keeping the distance between the fastening members 2a and 2b the same. Further, since the concrete pressure in the lower part of the formwork is increased, the mounting pitch of the circular form tightening band A is made finer. Note that the circular accuracy of the mold 5 may be corrected by a separator or the like.

As described above, the circular form tightening band A of this embodiment can be set one after another simply by winding the band body around the form 5 and tightening the nut 21. Further, it is possible to cope with molds of various sizes simply by adjusting the connecting portions between the band bodies.
In this case, the tightening state of all the portions can be made uniform only by adjusting the set scale 31, so that a mold having excellent accuracy and strength can be provided. Since the band main bodies 1a and 1b use a stainless steel band for a spring, the strength is large, the elongation is small, the band can be safely used any number of times, and the band is formed in a circular shape by a formwork or a crosspiece. Since it cannot be bent or folded, it can always be used in a new state without disturbing the folded state when setting. Furthermore, since they can be disassembled into two parts and can be superposed linearly, they can be stored in a narrow place. Also,
Since the structure is simple, it is easy to handle, and anyone can handle it easily and accurately.

Next, a second embodiment will be described with reference to FIG. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description thereof will be omitted. In the drawing, reference numeral 35 denotes an extension band used together with the band main bodies 1a and 1b, which is formed of the same material and dimensions as the band main bodies 1a and 1b, that is, a stainless steel strip for spring having a width of 50 mm and a thickness of 1.2 mm. Length 1
It is 750 mm. And 50mm on both ends
Of the bolt holes 3 with 150mm pitch
6 are provided. In this case, the band main bodies 1a and 1b are arranged on both sides thereof, and the ends can be overlapped with each other by simply using the connecting metal fitting 3 to connect the band main bodies 1a and 1b. The frame can be tightened and fixed. Note that a plurality of extension bands having different lengths can be prepared.

Next, a third embodiment will be described with reference to FIGS. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description thereof is omitted. The circular form clamping band according to the present embodiment is configured such that, when an elliptical form 5b, such as a veranda of an apartment, is provided in the middle of a planar form 5a, the oval form 5b is provided. , And 37 denotes a bent plate in the figure. The bending plate 37 has bolt holes 38 on both bending surfaces, and as shown in FIG.
a is connected to the terminal end of the a using the connection fitting 3, and
Although not shown, the band body 1b side is similarly connected, and the other end side is formed so as to be integrally fixed to the curved surface start end portion 5c of the mold frame with the separator bolt 39 of the mold frame. In this case, the extension band 35 can be used to cope with a longer oval mold.
It is to be noted that only the separator in this portion may be set in the tangential direction of the curved surface of the formwork, and the setting thereof may be arbitrarily set together with the angle of the bending plate.

Next, a fourth embodiment will be described with reference to FIGS. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description thereof will be omitted. The fastening portion of the circular form clamping band of the present embodiment includes a bolt fixing side fastening portion 40 in which a set bolt head 49 is fixed by a nut 50, and a nut receiving side fastening portion 41 which receives a tensile load by the nut 21. ,
Each of the bolt fixing side fastening portion 40 and the nut receiving side fastening portion 41 is provided with a reinforcing bracket.

The bolt fixing side fastening member 42 of the bolt fixing side fastening portion 40 is a substantially L-shaped fastening member fixed to the lower surface of the band together with a washer 43 and a bolt fixing side reinforcing metal member 44 by a bolt 45. Fastening fitting 42
Is overlapped with the upright portion 47 of the bolt fixing side reinforcing metal fitting 44 installed so as to cover from above, and a circular hole 48 is provided at the center of the overlapped upright portion. The set bolt 20 is inserted into the hole 48, and a nut 50 is fixed to an end of the set bolt 20, so that a set bolt head 49 is formed at an end of the set bolt 20. As a result, when the set bolt 20 receives a load in the pulling direction, the nut 50 is hooked on the hole 48 and the set bolt head 49 is formed by the two upright portions 46 and 47 to form the hole 4.
8 will be supported so as not to fall out.

The nut receiving side fastening part 41 is a nut receiving side fastening fitting 54 fixed with bolts 53 in a state where the bottom surface part 51 sandwiches the band body 1a together with the reinforcing plate 52.
And the bottom body 55 together with the reinforcing plate 52
It is composed of a substantially L-shaped nut receiving side reinforcing metal fitting 57 fixed by bolts 56 while holding a. The nut receiving-side fastening metal fitting 54 has an intermediate portion 58 formed obliquely, and the obliquely formed intermediate portion 58 can support a tensile load by being pulled. In addition, the front end 59 of the nut receiving-side fastening fitting 54 is bent at a right angle and protrudes to prevent the washer 60 from coming off during fastening. The upright portion 61 of the nut receiving side fastening metal fitting 54 and the upright surface portion 62 of the nut receiving side reinforcing metal fitting 57 are overlapped with each other and fixed with bolts 63, and a U-shaped notch is formed at the center of the overlapped upright portion. 64 are provided. The notch 64
Is provided, the set bolt 20 can be fitted into the nut receiving side fastening portion 41 from above, and the bolt fixing side fastening portion 4 can be removed without removing the nut 21 from the set bolt 20.
0 and the nut receiving side fastening portion 41 can be connected.

At the time of fastening, the nut 21 is turned with a spanner or the like,
The distance between the set bolt head 49 and the nut is reduced. Thereby, the bolt fixing side fastening portion 40 and the nut receiving side fastening portion 4
1 approaches. At this time, the nut 21, the washer 60, and the upright surface 62 of the nut receiving-side reinforcing metal fitting 57 are crimped, and the washer 6
0 indicates that the vertical edge 64 is the vertical surface 6 of the nut receiving side reinforcing metal fitting 57;
2 and the upper and lower parts are fitted between the nut receiving side reinforcing metal fitting 57 and the tip part 59, and the washer 60 is fixed.
The washer 60 and the set bolt 20 inserted through the washer 60 do not come off from the U-shaped notch 64.

The bolt fixing-side fastening fitting 42, the bolt fixing-side reinforcing fitting 44, the nut receiving-side fastening fitting 54, and the nut receiving-side reinforcing fitting 57 are made of metallic steel, and have the same width and thickness as the band main bodies 1a and 1b. Those having a length of about 5 to 10 mm are used. The side circumferences of the band main bodies 1a and 1b are formed smoothly so as not to be injured when touched by an operator.

The embodiments of the present invention have been described above.
The specific configuration of the present invention is not limited to this embodiment, and any change in design or the like without departing from the gist of the present invention is included in the present invention.

The width, length, thickness and the like of the bodies 1a and 1b and the extension band 35 can be set arbitrarily.

Further, the pitch and the number of rows of the bolt holes 15 and the end of the band can be arbitrarily set.

The shapes of the fastening fittings 2a and 2b, the connecting fitting 3, the bending plate 37, etc., the connection of bolts, and the like are also arbitrary.

[0034]

As described above, the circular form clamping band according to the first aspect of the present invention has the above-mentioned structure, and thus has a circular shape, an elliptical shape, a square shape or the like like a scaffold chain. Can be flexibly supported. It can be adjusted to an appropriate length according to the size of the mold. Tighten multiple steps one after another while adjusting the scale
With this, the entire formwork can be fixed accurately and evenly to improve accuracy and strength.
An excellent mold can be formed. Also work on the way
Such as being able to be fixed under the same conditions even if
Fruit is obtained.

According to the second aspect of the present invention, the circular form clamping band has the above-mentioned structure, and therefore, the upright surface of the other fastener is provided.
Insert the pulling bolt from the upper end and remove the nut
Without locking the nut.
Since the cut in is possible to only tighten the mold at a fixed give because, anyone accurately, also, can be easily set. Also, it can withstand larger tensile loads,
Even if large tensile load is applied suddenly, the fastener is damaged
Never. For this reason, a large formwork must be tightened and fixed.
It can also be used safely. Also, normal formwork
The number of round formwork tightening bands is smaller than
It is possible to eliminate it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a circular form clamping band according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a use state of the circular form clamping band of the first embodiment.

FIG. 3 is a perspective view showing a circular form clamping band to which an extension band according to a second embodiment is attached.

FIG. 4 is a perspective view showing a part of a circular form clamping band to which a bending plate according to a third embodiment is attached.

FIG. 5 is a perspective view showing a use state of a circular form clamping band to which a bending plate according to a fourth embodiment is attached.

FIG. 6 is a perspective view showing a fastening portion of a circular form fastening band according to a fourth embodiment.

7 is a vertical sectional view taken along the line BB in FIG.

[Explanation of symbols]

 A Circular form clamping band 1a, 1b Band main body 2a, 2b Fastening fitting 3 Connecting fitting 5 Form 11, 12 End of band main body 13, 14 Band surface 15 Bolt hole 16, 17 Start end of band main body 19, 23 Fastening Elevation surface of metal fittings 20 Set bolt 21 Nut 25 Tightening surface of coupling metal 26 Bolt hole of coupling metal 27 Standing edge of coupling metal 31 Set scale 35 Extension band 36 Bolt hole of extension band 40 Bolt fixing side fastening part 41 Nut receiver Side fastening part 42 Bolt-fixing-side fastening fitting 44 Bolt-fixing-side reinforcing fitting 46 Elevated surface 47 Elevated surface 54 Nut receiving-side fastening fitting 57 Nut receiving-side reinforcing fitting 64 Notch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-16246 (JP, U) JP-A-3-63659 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04G 13/02 E04G 17/065

Claims (2)

(57) [Claims] 1. A pair of fasteners for inserting bolts between mutually facing upright portions and tightening them with nuts in a pulling direction; each starting end band surface is formed on one mounting portion of each of the fasteners. And a pair of band bodies which are provided with bolt holes at a predetermined pitch on at least one side of the band surface and are removably bolted to each other with the terminal side band surfaces superimposed on each other . Round formwork fastening van
The one end of the one band main body on the side of the fastening fitting is
A protruding portion of the band main body which is provided to protrude from the fastening fitting;
The scale is within the length of the bolt inserted into the fastener.
A circular form clamping band characterized by being provided with: 2. A pair of fasteners, wherein said pair of fasteners are
A fastening fitting and a reinforcing fitting are fixed to the end, and the fastening fitting and the reinforcing fitting are fixed.
The elevations of the metal fittings are overlapped, and the overlapped elevations
A bolt fixing side having a bolt fixed thereto; and a fastening fitting and a reinforcing fitting fixed to one end of the band.
The elevations of the bracket and the reinforcing bracket are overlapped, and
Nut receiving side with notch for bolt installation on raised surface
The circular form clamping band according to claim 1 , comprising a fastening portion .