JPS6129888Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a mounting device for a scaffolding bolt socket that is buried and fixed to a concrete pole in order to screw the scaffolding bolt into the pole. This invention relates to a mounting device for sockets for scaffolding bolts on concrete poles, which are mounted from the inside of a formwork and to strengthen the mounting.

Conventionally, the mounting device used is a forming formwork 1 consisting of an upper formwork or a lower formwork as shown in Fig. 1.
Insert the head-mounted mounting bolt 3 from the outside of the molding form 1 into the hole 2a of the seat 2 fixed on the outer surface of the molding frame 1, and make the threaded part 3a of the mounting bolt 3 protrude into the molding form 1. While holding the mounting bolt 3 as it is with one hand of the worker, and placing the elastic washer 5 on the collar 4a of the socket 4 for the scaffold bolt made of hard porcelain or hard synthetic resin, use the other hand to tighten the scaffold. Grasp the bolt socket 4 and insert the scaffold bolt socket 4 into the threaded part 3a protruding into the modeling formwork 1.
The scaffolding bolt socket 4 is fixed to the modeling form 1 by screwing in the female screw 4b until the collar 4a comes into contact with the inner surface of the forming form 1 through the elastic washer 5. .

Therefore, with this conventional mounting device, while holding the mounting bolt 3 with one hand as described above, the female thread 4b of the scaffold bolt socket 4 must be aligned with the mounting bolt 3 and screwed in with the other hand. Therefore, it is extremely troublesome to align the screws in a state where the mounting bolts 3 and the scaffolding bolt sockets 4 cannot be directly seen inside the modeling formwork 1, and where both the mounting bolts 3 and the scaffolding bolt sockets 4 are swinging. Furthermore, since both the mounting bolt 3 and the scaffolding bolt socket 4 are tightened while being held by hand, the tightening force tends to be insufficient. Also, seat 2
Since there is a gap between the hole 2a and the mounting bolt 3, the lack of tightening force mentioned above also occurs, and during the centrifugal compaction process after inserting the concrete into the column, the unsolidified concrete becomes an elastic washer. 5 and the inner surface of the shaping formwork 1, or between the elastic washer 5 and the collar 4a, leaking from the hole 2a of the seat 2, etc.
There were various drawbacks.

Furthermore, a concrete pole scaffolding socket mounting device is known, which is disclosed in Japanese Utility Model Publication No. 43-9559. However, as shown in Figure 2 of the same publication, this is because the formwork 10 has a hole into which the socket 1 can be inserted, and the mounting seat 9 has a center seat (hollow part) of approximately the same diameter as this hole. A collar provided at the lower end is placed around the hole of the formwork 10,
Further, the socket 1 is slidably inserted into the inner seat of the mounting seat 9 with the threaded portion 3 facing upward. A packing 7 is placed on the upper surface of the mounting seat 9 and the socket 1, and the threaded portion of the bolt 4 is screwed into the threaded portion 3 of the socket 1. Furthermore, this bolt 4 has a protruding upper end portion shaped like a flange to serve as a spring receiving seat 5, and a lower portion thereof is stepped to have a slightly smaller diameter so that a spring can be inserted between the lower end portion of the mounting seat 9 and the protruding flange. 8 has been inserted. It has a hanging wall 6 formed to have a smaller diameter than the stepped portion, and is formed so that the outer surface of the hanging wall 6 can be fit loosely into the center seat (hollow portion) of the mounting seat 9, Furthermore, the lower end of the bolt 4 is provided with a stepped portion 6' having a smaller diameter than the hanging wall 6, and is placed on the packing 7. Therefore, when attaching this to the formwork 10, as shown in FIGS. 2 and 3,
First, when the catch seat 5 is pressed, since the diameter of the packing 1 is slightly larger than the diameter of the hollow hanging wall 9, its outer circumferential portion bends upward and comes into close contact with the stepped portion 6', causing the hollow hanging wall to close. It descends along the inner cylindrical surface of the wall 9. Furthermore, if the catch seat 5 is pressed, the gasket 7 will be attached to the mounting seat 9.
As shown in FIG. 3, the concrete is placed on the lower surface of the formwork 10 and returns to its original shape to fit tightly into the formwork 10 to prevent the concrete cast into the formwork 10 from being exposed.
Therefore, with this device, when the socket 1 is attached to the formwork 10, it is supported inside and outside the formwork 10 by the packing 7 and the spring 8, and the repulsive force of the spring 8 is large. If it is too long, there is a risk that the packing 7 will come out of the hole in the formwork 10,
Also, if the repulsive force of the spring 8 is too weak, the formwork 1
Therefore, there are defects such as the embedding angle of the socket 1 not being perpendicular to the formwork 10 due to the pressure of concrete during centrifugal molding. Therefore, the problem arises of trying to overcome these deficiencies and to enable socket attachment from one side of the formwork.

This invention was proposed in an attempt to solve the above-mentioned problem, and includes a mounting bolt that is screwed into a socket for a scaffolding bolt.
In a socket mounting device that is screwed into a seat fixed to the outer surface of a modeling form, the scaffolding bolt is headless, and one end of the bolt is provided with a wrench hole vertically, and does not have a wrench hole. One end of the mounting bolt is screwed into the inner surface of the scaffold bolt socket, and the other end is screwed into the female threaded part, and the threaded part of the mounting bolt protruding from the flange of the scaffold bolt socket is inserted into the seat from the inner surface of the modeling form. It is an object of the present invention to provide a mounting device for a socket for a scaffolding bolt on a concrete pole, characterized in that the socket is screwed into a threaded portion. Hereinafter, embodiments of this invention will be described in detail with reference to the attached drawings.

As shown in FIG. 2A, a seat 6 with a female thread 6a is fixed on the outer surface of the forming frame 1, and a square wrench hole 7a is recessed in one end of the headless mounting bolt 7. Then, screw the screw 4b of the scaffold bolt socket 4 into the other end of this mounting bolt 7, and then tighten the flange 4a.
Place the elastic washer 5 on the bolt, and as shown in FIG. When screwed in, the scaffolding bolt socket 4 is fixed to the modeling formwork 1 as shown in FIG. 2A.

Next, the other embodiment shown in FIG. 3 has a small diameter male screw 8a that can be screwed into the female thread 4b of the scaffold bolt socket 4, and a larger diameter than this male screw 8a, and both have the same lead. Formed male thread 8
b is provided on the mounting bolt 8, an elastic washer 5 is placed on the collar 4a of the scaffolding bolt socket 4, and the scaffolding bolt socket 4 is screwed into this male thread 8a to connect the large and small male screws 8b and 8a. When the side surface of the elastic washer 5 is brought into contact with the stepped portion 8c, and the male thread 8b of the mounting bolt is screwed into the female thread 9a of the seat 9 fixed to the molding form 1, the scaffolding bolt is inserted through the elastic washer 5. The socket 4 is configured to be fixed to the modeling formwork 1, and the mounting bolt 8
There is a square wrench hole 8d on the head for extraction.
is recessed.

Since the scaffold bolt socket mounting device according to this invention is constructed as described above, in order to attach the scaffold bolt socket 4 to the modeling form 1, the side of the mounting bolt 7 that does not have the wrench hole 7a should be inserted into the scaffold bolt. screwed into the female thread 4b of the socket 4, and
If the elastic washer 5 is placed on a and the threaded portion 7b protruding from the collar 4a is screwed into the female thread 6a of the seat 6 from the inner surface of the modeling form 1, the scaffolding bolt socket 4 will be attached to the forming mold via the elastic washer 5. It will be fixed to frame 1. Therefore, the threaded portion 7b of the mounting bolt 7
When screwing into the female thread 6a of the seat 6, the worker only needs to use one hand holding the scaffold bolt socket 4, making the work extremely easy. Since the operator aligns the threaded portion 7b of the mounting bolt 7 while directly visually observing the female thread 6a of the insulating seat 6,
This positioning work can be performed extremely easily and accurately.

Since the mounting bolts 7 are screwed into the seats 6 fixed to the modeling formwork 1 and tightened, the sockets 4 for scaffolding bolts are tightened firmly and cannot be loosened. As shown, the elastic washer 5 is sufficiently attached to the inner surface of the molding frame 1 and the collar 4.
Since it is in close contact with a, there is no fear of concrete leakage during centrifugal compaction work. In the dismantling work after forming the concrete pole, the mounting bolt 7
If the mounting bolt 7 is turned using a wrench inserted into the wrench hole 7a, the mounting bolt 7 will be removed from the female threads 4b and 6a of the scaffolding bolt socket 4 and the seat 6, respectively.
Since the mounting bolt 7 can be removed, the operation for removing the mounting bolt 7 is also extremely easy. In addition, the other embodiment shown in FIG.
There is a step 8 at the boundary between the male threads 8a and 8b of the mounting bolt 8.
c, even if the scaffolding bolt socket 4 is turned too far when screwing the mounting bolt 8 into the seat 9, once the collar 4a comes into contact with the step 8c, there will be no further movement. Therefore, the end of the male screw 4b is connected to the socket 4 for the scaffolding bolt.
There is no danger of the scaffolding bolt piercing through the screw bottom 4c, and the scaffolding bolt socket 4 is always installed in a stable state.

As described in detail in the embodiment described, the mounting bolt screwed into the socket for the scaffolding bolt is formed without a head at its upper end, so that it is fixed to the outside surface of the formwork in advance. The seats on the outside of the formwork and the sockets for scaffolding bolts on the inside of the formwork can be screwed into the seats from the inside of the formwork, and the seats on the outside of the formwork and the sockets for scaffolding bolts on the inside are extremely strongly attached to the formwork, so centrifugal Even during molding, the sockets for scaffolding bolts can be buried in a state where they are always attached at right angles to the formwork. As mentioned above, this scaffolding bolt socket can be installed by simply screwing the mounting bolt into the seat fixed on the outside surface of the formwork from the inside surface of the formwork, so the work is easy. performance will be significantly improved. Furthermore, after the concrete has hardened, a wrench hole into which a wrench can be inserted is provided at the tip of the mounting bolt, so by inserting a wrench there and turning, the mounting bolt can be easily removed from the outside surface. It can be removed.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing a conventional scaffold bolt socket mounting device, Figs. 2A and 3 are longitudinal sectional front views showing respective embodiments of this invention, and Fig. 2B is the same. FIG. 3 is a longitudinal sectional front view showing the device in FIG. Code explanation, 1... Modeling formwork, 2, 6, 9...
Seat, 2a... Hole, 3, 7, 8... Mounting bolt, 3
a, 7b...threaded part, 4...scaffolding bolt socket, 4a...tsuba, 4b, 6a, 9a...female thread,
4c...Screw seat, 5...Elastic washer, 7a, 8
d...Wrench hole, 8a, 8b...Male thread, 8c...
...Danbe.

Claims (1)

[Scope of utility model registration request] In a socket installation device in which a mounting bolt to be screwed into a scaffold bolt socket is screwed into a seat fixed to the outer surface of a modeling form, the scaffold bolt is headless and a wrench is attached to one end of the bolt. A hole is provided vertically, and the end without the wrench hole is screwed into the internal thread of the scaffold bolt socket, and the threaded part of the mounting bolt protrudes from the collar of the scaffold bolt socket. A mounting device for a socket for a scaffolding bolt on a concrete pole, characterized in that the socket is screwed into the female threaded portion of the seat from the inner surface of the shaping form.