JPS63926Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seat member suitable for use between a form board and a spacer in a concrete form construction method.

When constructing a concrete wall, etc., conventionally, formwork boards with holes for tightening rods placed at appropriate intervals are erected in two rows facing each other depending on the height and width of the wall, etc. to be constructed. In addition, so-called spacers are used to regulate the distance between opposing formwork plates, and concrete is poured into concrete molds after the formwork is firmly held by tightening a holding material usually made of long steel pipes to the spacers with holding fittings. The frame construction method is used.
According to this construction method, concrete walls and the like can be constructed satisfactorily, but there are points that need to be further improved regarding the relationship between the formwork plates and spacers.

In other words, in the conventional concrete form construction method,
As shown in FIG. 1, the so-called spacer 1,
Normally, a flat nut 3 is hinged to the threaded part 2 of a metal round bar with threaded parts 2 at both ends so that the distance between the flat nuts 3 corresponds to the thickness of the wall to be constructed. After making the two tips protrude from the tightening rod insertion hole 5 provided in the form plate 4, and arranging the restraining members 6 and 7 horizontally and vertically to the protruding screw part 2,
Since the distance between the opposing formwork plates 4 was regulated by applying a presser metal 8 to the presser material 7 and tightening it with a nut 9, the nut 9 was loosened after concrete pouring was completed. When the formwork is removed, the threaded portion 2 of the spacer 1 will be exposed on the built wall surface, and since the threaded portion 2 is integrated with the spacer 1, it is extremely difficult to completely remove it. This problem cannot be ignored from an aesthetic point of view, especially when the surface is not treated, such as the exposed concrete walls that have become common these days.

In view of the above-mentioned problems with conventional products, Utility Model Application Publication No. 56-100946 has developed a catch member that can easily remove protruding objects from the surface of a wall, etc. when constructed using the concrete form construction method. It has been proposed as,
There are structural difficulties.

The present invention was made with the purpose of providing a seat member that can easily remove the protrusion as described above and has a simple structure. A receiver for a concrete form spacer comprising a nut member provided with a threaded rod extending from the other side, and a seat having a truncated conical cylindrical shape and having a through hole in the center into which the flange side of the nut member is fitted. In the seat member, the screw rod is screwed into the screw tube to be connected and fixed to the screw tube, and has a flat portion facing the outer surface of the screw rod in the middle in the length direction. It is.

Next, the present invention will be explained using figures.

Reference numeral 10 denotes a nut member constituting the seat member of the present invention, which is a hexagonal nut with a screw thread 11 carved on the inner surface, and a flange portion 13 is provided at one end of a threaded cylinder 12, and the other end has a suitable length. , a screw rod 15 having mutually parallel flat portions 14 is screwed onto its side surface, but the outer shape of the screw tube 12 is not limited to a hexagonal shape, and may be a polygonal shape as appropriate. Good.

Further, 16 is a catch that constitutes the catch member of the present invention,
The catch seat 16 is made of synthetic resin such as nylon or Teflon and is formed into a truncated conical shape so that it can be easily pulled out from the constructed concrete wall, and corresponds to the threaded cylinder 12 of the nut member 10 provided therein. A recess 1 having a shape corresponding to the flange portion 13 provided at one end of the screw tube 12 is provided above and below the through hole 17 having the shape.
8 and an open recess 19 having a shape that follows the outer shape of the catch seat 16. When the nut member 10 is inserted into the catch seat 16 from the threaded rod 15 side, the catch seat 1
6 is fitted into the threaded cylinder 12 of the nut member 10, and the tip of the threaded cylinder 12 of the nut member 10 projects slightly from the open recess 19 of the seat 16. This constitutes an example of a member.

The seat member of the present invention constructed as described above is used in the following manner in the concrete form construction method.

That is, like the spacer 1, a round bar with threaded ends at both ends is inserted into the threaded tube 1 from the seat side of the seat member of the present invention.
2, and then, as in the case of using the conventional spacer 1 explained with reference to FIG. It is used to firmly hold the formwork by tightening it, and when a concrete wall, etc. is constructed using the seat member of the present invention in this way, the screw rods 15 are removed from the wall, etc. after the formwork plate is removed. The protruding point is the same as the conventional one, but the screw rod 1
5 is not integral with the round bar to be buried in a concrete wall, etc., but is a screw tube 12 into which the round bar is screwed.
Since it is fixed to the screw tube 12 protruding from the open recess 19, it can be easily removed by rotating the seat member of the present invention, such as by fitting a box wrench into the tip of the screw tube 12 protruding from the open recess 19. Even if the walls are left exposed, their beauty will not be compromised.

As a result, a new construction method was developed that followed the use of long steel pipes as a restraining material, which had been indispensable in recent concrete form construction methods. In this construction method, a plurality of formwork boards made of plywood or the like of an appropriate thickness are erected in two rows and are strong enough to maintain flatness without bending when concrete is poured into the formwork. A spacer is interposed between the joints of adjacent formwork plates in the opposite row and the joints of adjacent formwork plates in the other row, and the adjacent formwork plates are connected to each other in relation to the spacers. The seat member of the present invention can also be used in this method, in which the parts are tightly connected and formed into a formwork using fasteners that are tightened at the same time.

That is, as shown in FIG. 3, the threaded portion 21 of the round bar 20 is screwed into the threaded tube 12 of the seat member of the present invention, and the lower end of the seat 16 is brought into contact with the formwork plate 22, and the threaded rod 15 protrude from a tightening hole formed by a notch 23 provided at the vertical end of the adjacent formwork plate 22,
A hexagonal cylindrical fastener 24 having a flange portion is screwed onto the threaded rod 15 to tighten adjacent formwork plates.In this way, a formwork is formed and a concrete wall or the like is constructed. Once completed, the seat member of the present invention can be removed by rotating it by some means in the same way as described above.

In the new construction method mentioned above, the seat member and fastener of the present invention are installed between adjacent formwork plates, so water containing cement will not leak from the gaps between the formwork plates. In order to solidify within the open recess 19 of the catch seat 16,
Although it may be difficult to rotate the screw barrel 12 with a box wrench or the like, even in such cases, the seat member of the present invention has a pair of parallel flat portions 14, 14 on the side surfaces of the screw rod 15. , when using this part,
Since it is located in the tightening hole formed by the notch 23 of the form plate 22, cement will not adhere and harden, so by using this part, the seat member of the present invention can be easily rotated. It has the unique effect of being able to be removed.

The screw rod 15 that is fixedly attached to the screw tube 12 can be a bolt with the head cut off, which is usually used. Therefore, the screw rod 15 and the screw tube can be connected only by screwing and fixing. Furthermore, since it is easy to form the flat portion 14 on the side surface of the shaft portion of the screw rod 15, the seat member of the present invention is easy to manufacture, and its cost is low and economical.

Since the present invention is as described above, it is extremely practical as a spacer seat member for concrete formwork construction.

[Brief explanation of the drawing]

Figure 1 is a side cross-sectional view showing a spacer in the conventional concrete form construction method, Figure 2 is a partially sectional side view showing an example of the seat member of the present invention, and Figure 3 is a side view of the seat of the present invention. It is a side sectional view showing an example of use of a member. 10... Nut member, 12... Spiral tube, 13...
Flange part, 14... Flat part, 15... Screw rod, 1
6... Seat, 17... Through hole, 18... Recess, 1
9...Open recess.

Claims (1)

[Scope of utility model registration request] A nut member having a flange provided on one side of a screw cylinder and a screw rod extending from the other side, and a seat having a truncated conical cylindrical shape and having a through hole in the center into which the flange side of the nut member is fitted. In the receiving member for a concrete form spacer, the screw rod is screwed into the screw tube to be connected and fixed to the screw tube, and has a flat part facing the outer surface of the screw rod in the middle in the length direction. A catch member for a concrete formwork spacer, characterized in that it is formed.