JPS6040761Y2 - Concrete formwork fasteners - Google Patents

Description

[Detailed description of the invention] The present invention relates to a concrete formwork fastener for connecting concrete formworks erected opposite each other to maintain a constant distance between the formworks. This invention relates to a concrete formwork fastener that can be adjusted in response to changes in frame angle.

Concrete form fixing fittings, commonly referred to as separators, are used to maintain a constant distance between concrete formworks erected facing each other and pour concrete.

This concrete formwork fastener is used to connect concrete formworks that are erected opposite each other to maintain a constant spacing between the formworks. However, if the formwork spacing and formwork angle change, the same type of concrete The formwork fasteners may become unusable, or excessive force may be applied to the concrete formwork fasteners, resulting in damage to the concrete formwork fasteners.

Therefore, as shown in, for example, Japanese Utility Model Publication No. 35-28851, concrete formwork fasteners are made of two round bars.
It consists of a series of book rods, a turnbuckle that connects the proximal ends of the series rods, and an attachment member to the concrete formwork that is pivotally connected to the tip side of the series of rods, and the distance between the concrete formworks. Changes in length can be adjusted using turnbuckles, and changes in the angle of the concrete formwork can be dealt with by rotating the members when attaching to the concrete formwork using connecting rods.

However, since this conventional technology uses round bars as continuous rods to maintain the spacing between the concrete formworks, the bending strength is not necessarily sufficient, and there is a problem in particular with the separator top of large steel concrete formworks. Ta.

In addition, the means for pivotally connecting the connecting rod made of a round bar and the mounting member to the concrete formwork is simply bent at the tip of the round bar and hooked onto a bolt on the mounting member side, which provides stability. (The connecting rod and the attachment member to the concrete formwork are bent in unnecessary directions.)

) Furthermore, the structure of the mounting member to the concrete formwork is extremely complicated, which has the disadvantage of increasing manufacturing costs.

Furthermore, as seen in Japanese Utility Model Publication No. 35-952, it has been proposed to use round bars as continuous rods to maintain the spacing between concrete forms, and flat plates as attachment members to the concrete forms. In the case of this conventional technology, there is also a problem with bending strength because round bars are used as connecting rods.
In addition, the means for pivotally connecting the continuous rod and the mounting member to the concrete formwork is simply to bend the tip of the continuous rod made of a round bar and hook it into a hole made in the mounting member made of a flat plate. However, it still had drawbacks such as poor stability.

The present invention was devised to solve the above-mentioned drawbacks of conventional concrete formwork fasteners, and its purpose is to provide sufficient bending strength as a continuous link to maintain the spacing between concrete formworks, and A concrete mold that does not cause unnecessary rotation at the pivot joint between the connecting rod and the mounting member to the concrete formwork, is mechanically simple, and can be provided at low cost. To provide frame fasteners.

In order to solve the above problems, according to the present invention, channel members having a U-shaped cross section are used as the connecting rods 9 and 10 that maintain the spacing between the concrete formworks in the drawing, and are connected to the concrete formworks 2 and 3. A flat plate material is used as the connector 12.13.

Further, as a hinge connection means between the connecting rods 9 and 10 and the connecting devices 12 and 13, the connecting rods 9 and 13 of the connecting devices 12 and 13 made of flat plate materials are used.
, 10 with pins 9b and 10b at the tip.
A notch 12 is formed by forming and bending cylindrical portions 12a and 13a to pass through, and inserting the distal ends of continuous rods 9 and 10 made of channel material having a U-shaped cross section into the bent portions 12c and 13c.
d and 13d, and a connecting rod 9 is formed in the notches 12d and 13d.
.
Connectors 12.13 are hingedly connected to the connecting rods 9, 10 by passing pins 9b, 10b through holes formed in holes c, 10c.

In the drawing, a concrete formwork fastener, generally indicated by 8, is placed between the concrete formworks 2 and 3 that are erected opposite each other, and the connecting fittings 12 and 13 are connected to the respective formworks 2 and 3.
3 and connect the concrete formwork 2.3 with the concrete formwork fasteners 8 by passing the bolts 7 through the holes 12b and 13b made in the connecting tool 12.13.

As a result, the concrete formworks 2 and 3 are held together by the concrete formwork fasteners 8.

At this time, if the spacing between the concrete forms 2 and 3 differs slightly, the length is adjusted using the turnbuckle 11.

In addition, if one concrete formwork 2 is vertical as shown in Fig. 4, but the other concrete formwork 3 is inclined, the connecting rods 10 may be The connecting tool 13 rotates against the concrete formwork stopper 8.
Prevent excessive force from being applied to the

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, the concrete formwork fastener, indicated by 8 as a whole, includes a pair of continuous rods 9 and 10 arranged in a straight line, and a turnbuckle 11 that connects the base ends of the continuous rods 9 and 10 to each other. and connected by bolts 7 to the concrete forms 2.3 which are hinged to the ends of the connecting rods 9.10 on the opposite side to the side joined by the turnbuckles 11 and are erected facing each other. The connectors 12 and 13 are connected to each other.

FIG. 2 shows details of the concrete form stopper 8, and FIG. 3 shows details of the turnbuckle 11.

The connecting rods 9 and 10 are made of channel material having a U-shaped cross section, and each has an end plate 9a on its base end side.

10a is fixed by welding or the like, and the end plate 9a,
The connecting rods 9 and 10 are connected in a straight line by fixing screws 11a and 11b of the turnbuckle 11 to the turnbuckle 10a by welding or the like.

Also, a connecting tool 12 connected to the concrete forms 2 and 3.
13 is made of a flat plate material, and the connecting tool 12,1 is made of a flat plate material.
The side that is hinged to the connecting rods 9 and 10 of 3 has a pin 9 at the tip.
It is bent to form cylindrical parts 12a and 13a through which b and 10b pass, and the bent parts 12c and 13c have notches 12d into which the distal ends of the connecting rods 9 and 10 made of channel material having a U-shaped cross section are inserted. , 13d are formed.

Therefore, the connecting rod 9 is connected to the notches t2d and 13d of the connecting tool 12.13.
. are hinged to the connecting rods 9 and 10.

Further, holes 12b and 13b are formed in the connecting tools 12 and 13, through which bolts 7 are passed when connecting to the concrete formworks 2 and 3.

In use, since the turnbuckle 11 is provided, the total length can be adjusted, and even if the distance between the concrete formworks 2 and 3 is slightly different, the same type of concrete formwork fasteners can be used.

Furthermore, as shown in FIG. 4, even if one concrete formwork 2 is vertical and the other concrete formwork 3 is inclined, the connecting rods 9 and 10 and the connectors 12 and 13 are connected by hinges. Therefore, as shown by the two-dot chain line in Fig. 4, the connectors 12 and 13 can be rotated at any angle with respect to the connecting rods 9 and 10, and therefore no bending moment is applied, thereby preventing inconveniences such as breakage. It will never come.

According to the present invention, the following excellent effects can be obtained.

■ Changes in the spacing of concrete formwork can be dealt with by adjusting the length with turnbuckles.
In addition, the inclination of the concrete formwork can be dealt with by connecting the joints with hinges, so even if the spacing and angle of the concrete formwork changes, no excessive force will be applied to the concrete formwork fasteners. do not have.

■ Channel material with a U-shaped cross section is used as the connecting rod that maintains the spacing between the concrete formwork, so it can provide the sufficient strength required for the concrete formwork fasteners.

■ The hinge connection structure between the connecting rod and the connecting tool is such that the side of the connecting tool made of a flat plate that is hinged to the connecting rod is bent to form a cylindrical part at the tip through which the pin is passed, and the bent part is bent. forming a notch into which the distal end side of a continuous rod made of channel material having a U-shaped cross section is inserted, and inserting the distal end side of the continuous rod into the notch,
Since the connecting tool is hinged to the connecting rod by passing a pin through a hole formed in the cylindrical part of the connecting tool and the hole formed in the side wall of the channel material of the connecting rod, the connecting tool can be connected only in the required direction with respect to the connecting rod. The concrete formwork can be held in the correct position at all times.

■ The connecting rod is made of channel material with a U-shaped cross section, the connecting device is made of flat plate material, and the hinge connection structure between the connecting rod and the connecting device is as described in ■, so it is robust and structurally. It is simple and can be manufactured at low cost.

■ The above-mentioned hinge connection structure between the connecting rod and the connecting tool can be distantly related by using a channel material with a U-shaped cross section as the connecting device and using a flat plate material as the connecting tool. Using a channel material and using a flat plate material as a connecting tool increases the bending strength of the connecting rod,
In addition to simplifying the structure of the connecting tool, this is also significant for the hinge connection structure between the connecting rod and the connecting tool.

[Brief explanation of drawings]

Fig. 1 is a front view showing concrete formworks connected by concrete formwork fasteners according to an embodiment of the present invention; Fig. 2 is a perspective view of the concrete formwork fasteners according to an embodiment of the present invention; Figure 3 is a vertical cross-sectional view showing a part of the turnbuckle part in plan, and Figure 4 is a diagram showing how to secure the concrete formwork using the concrete formwork fastener according to the embodiment of the present invention when one of the concrete formworks is inclined. It is a front view showing a connected state. Death...Concrete formwork fastener, 9,10...
・・・・Running rod, 9a, 10a・・・・End plate, 9b,
10b...Pin, 11...Turnbuckle, 12.13...Connection tool, 12a, 13a
...Cylindrical portion, 12b, 13b...hole, 12c, 13c...bent portion, 12d, 13
d...Notch.

Claims (1)

[Scope of utility model registration request] A pair of connecting rods arranged in a straight line, a turnbuckle that connects the proximal ends of each of the connecting rods to each other, and a hinge on the distal end side of each of the connecting rods on the opposite side to the side joined by the turnbuckle. The concrete formwork fasteners are connected to each other and are connected to the concrete formworks, and connect concrete formworks erected opposite each other to hold the concrete formworks together. The connecting rod is made of a channel material having a U-shaped cross section, and the connecting tool is made of a flat plate material, and the side of the connecting tool made of the flat plate material that is hinged to the connecting rod forms a cylindrical part at the tip into which a pin is passed. At the same time, a notch is formed in the bent portion into which the distal end side of the continuous rod made of channel material having a U-shaped cross section is inserted, and the distal end side of the continuous rod is inserted into the notch. , the connecting device is hinged to the connecting rod by passing a pin through a hole formed in the cylindrical portion of the connecting device and the channel material side wall of the connecting rod, and the connecting device has a mechanism for connecting to the concrete formwork. A concrete formwork fastener characterized by having holes formed therein.