JPS6123567Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is connected to a pair of concrete forms,
This invention relates to a concrete formwork connection fitting whose length is freely adjustable.

[Prior art]

Various types of such concrete formwork connecting fittings have been proposed in the past. For example, a pair of connecting fittings each having a U-shaped cross section are provided with a large number of through holes in the side walls, and these through holes are selected and connected with pins. A device that adjusts the height (see, for example, Japanese Utility Model Application Publication No. 155967/1983) is known. Also, the length can be adjusted by connecting a pair of connecting metal fittings with a turnbuckle (for example,
53-83967) is known. However, the pin connection has the disadvantage that a single pin is weak in strength, and the pin is easily lost in the field. Additionally, those using turnbuckles had the disadvantage that machining the left and right screws was troublesome, the screws rusted, and the screwing process was difficult.

When the distance between a pair of concrete formworks, that is, the span, is relatively short, it is known that a single plate is used, and because it is relatively inexpensive, it is used as a concrete formwork connection fitting that is often buried. is convenient. However, the span of such plate-shaped connecting fittings cannot be adjusted. The reason for this is that since the plates are installed horizontally, they are relatively weak against forces generated in the vertical direction, making it impossible to adjustably fix the two plate-shaped connecting members.

[Purpose of invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a concrete formwork connecting fitting that is strong and can reliably connect a pair of flat plate-shaped connecting fittings to each other in an adjustable length manner.

[Structure of the idea]

According to the present invention, in a concrete formwork connecting fitting that is connected to a pair of concrete formworks and whose length is freely adjustable, one end is connected to the concrete formwork, and the other end has a plurality of protrusions. a flat first connecting member in which a joining element is formed and a slit-like cut is formed in the center thereof, and one end thereof is connected to a concrete form;
and a flat second connecting member having a connecting member attached to the other end thereof, and the connecting member is composed of a pair of L-shaped members that can swing relative to each other,
The tip of one side of each L-shaped member is pivotally connected to the second connecting member, and the other side is formed with a plurality of through holes in which the convex portion of the first connecting member engages, and the connecting member The cross section is C-shaped so as to surround the
A tightening member having a taper that engages with the other side of the L-shaped member having the through hole is provided.

[Function and effect of the idea]

Therefore, during assembly, the pair of L-shaped members are first spread apart and the engaging element of the first connecting member is inserted between them. Then, the L-shaped member is narrowed so that the convex portion of the engaging element of the first connecting member is engaged with the through hole of the L-shaped member at a predetermined length. Since a plurality of protrusions and through holes are provided, the length can be adjusted by shifting their engagement positions. Since the pair of L-shaped members are tapered and engaged with each other by the tightening member so that they do not spread, simply pressing and inserting the tightening member connects the L-shaped member provided on the second connecting member with the first one. can be firmly connected to the connecting member.

Therefore, its assembly and length adjustment can be easily carried out on site, and since the connecting portion of the first and second connecting members is reinforced by the L-shaped member and the tightening member, it is strong. It is also sufficient. Therefore, it is suitable for interconnecting flat connecting members.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Now, as shown in Fig. 1, the concrete formwork connecting fittings in which the present invention is implemented include a first connecting member 1 made of a flat steel plate, and a second connecting member 1 having a similar shape.
connecting member 10, coupling member 20, and tightening member 3
It consists of 0. The first connecting member 1 has a through hole 2 formed at one end thereof to be connected to a concrete formwork (not shown), and an engaging element 3 formed on both sides of the other end over a certain length. ing. The engagement element 3 may have a sawtooth shape or various other shapes, but generally, as shown in the figure, a plurality of convex portions are continuously formed. Further, a slit-shaped cut 4 is formed approximately at the center of the engaging element and extends approximately the same length as the engaging element, and a pin 12 described later can pass through this cut.

The second connecting member 10 is provided with a through hole 11 at one end, similar to the first connecting member, and a connecting member 20 is swingably attached to the other end with a pin 12.

The coupling member 20 is composed of a pair of substantially L-shaped members 21 and 21', which are coupled to each other by a pin 12 at the tip of one side so as to be able to swing relative to each other. In the illustrated example, this pin 12 is connected to the second member 1 as described.
It is also used in the installation of 0. Further, since the pair of L-shaped members 21 and 21' are swingably connected, one member is formed to have a larger width than the other member (see FIG. 2).
The opposite side portions 22, 22' of the L-shaped members 21, 21' are provided with a plurality of through holes 2 that engage with the engaging elements 3, that is, the convex portions of the first connecting member, respectively.
3, 23' are arranged in a row. Further, since the connecting member 20 is also formed from a steel plate or punching, the peripheral edge portion is bent inward to form flange portions 24, 24' in order to provide strength.

The tightening member 30 has a substantially C-shaped cross section, and its planar shape is formed to have a large diameter, that is, to have a taper. The space 33 formed by the plane portion 31 and the hook portion 32 is the space 33 formed by the connecting member 2
The other side portions 22, 22' of 0 are slidably inserted.

Since the concrete formwork connection fitting according to the present invention is constructed as described above, when it is used, the ends of the first and second connection members are connected to the concrete formwork (not shown) through holes 2, 11, etc. Fix it using. Then, the engaging element 3, that is, the convex portion of the first connecting member 1 is inserted into the space defined by the other side portions 22, 22' of the connecting member 20 so that the molds are spaced at a predetermined interval. At this time, the notch 4 is inserted so as to sandwich the pin 12. Then, the convex portion is aligned with the through hole in advance so as to have a predetermined length, and the tightening member 30 is attached to the other side portion 2 of the coupling member 20.
2 and 22', and move it toward the larger taper as shown by arrow A. Then, the other side parts 22, 22' swing around the pin 12, and the interval between the other side parts 22, 22' becomes narrower, so that the convex part of the engaging element 3 of the first connecting member is connected to the connecting member. 20 through holes 23, 23', and the first and second connecting members 1, 10 are firmly connected. Since the length of this type of connecting fitting does not usually change much, a plurality of protrusions usually engage with the through hole.

〔summary〕

As explained above, according to the present invention, it is easy to assemble on-site, and since there is an L-shaped member and a tightening member in the assembled state, it is much stronger than the conventional one. Also, the connecting member is the second
Since they are attached to the connecting member, there is no need to worry about losing them. Further, according to the present invention, since it is manufactured from a steel plate by pressing or punching, mass production is possible and it can be provided at low cost. Although not shown, the tightening member 30 may be inserted into the first connecting member during assembly and then inserted and fixed into the coupling member 20. When assembled in this way, the cross-sectional shape of the tightening member 30 becomes elliptical, that is, the hook portion 32,
It can also be formed so that the tips of 32 are in contact with each other. When constructed in such a shape, the strength of the tightening member is improved.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a concrete formwork connection fitting according to the present invention, and FIG. 2 is a cross-sectional view in an assembled state, corresponding to the direction indicated by the arrow - in FIG. 1. DESCRIPTION OF SYMBOLS 1... First connection member, 3... Engagement element (convex part), 4... Slit-shaped cut, 10... Second connection member, 12... Pin, 20... Connection member, 21, 21'...L-shaped member, 22, 22'...
...Other side parts facing each other, 23, 23'...through hole,
24, 24'...flange portion, 30... tightening member.

Claims (1)

[Scope of utility model registration request] In a concrete formwork connection fitting that is connected to a pair of concrete formworks and whose length is freely adjustable, one end is connected to the concrete formwork, and the other end is formed with an engaging element having a plurality of protrusions, and a flat plate-shaped first connecting member having a slit-like cut formed in the center thereof, and a flat plate-shaped first connecting member having one end connected to the concrete formwork and a connecting member attached to the other end. The connecting member is composed of a pair of L-shaped members that can swing relative to each other, and the tip of one side of each L-shaped member is pivotally connected to the second connecting member,
A plurality of through holes are formed on the other side to which the convex portion of the first connecting member engages, and the cross section is C-shaped so as to surround the connecting member, and the through hole of the L-shaped member is formed to surround the connecting member. 1. A concrete formwork connection fitting, comprising: a tightening member having a taper that engages with the other side of the concrete formwork.