JPS6355265A - Method for magnetically detecting probe mounted in box to closely adhere and fix box opening surface to mold frame - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of magnetically detecting a detection tool attached to a box and tightly fixing the opening surface of the box to a formwork.

[Conventional technology]

When burying a box such as an outleft box in a concrete wall, it is important to keep the opening of the box firmly in contact with the inside surface of the formwork before placing the concrete. The pressure causes concrete to flow into the box through the opening.

Therefore, after building the formwork, we metal-detect the box position from the outside of the formwork, drill an insertion hole in the formwork in the area where the box is located, and insert a pulling tool into the formwork through this insertion hole. It must be screwed into the screw hole in the bottom, and the box opening must be drawn to the formwork and tightly fixed to its inner surface.

[Problem that the invention seeks to solve]

Boxes buried in concrete walls are either made of metal or resin. If the box is made of metal, it should be possible to detect its position from outside the formwork with a so-called metal detector; The outside of the frame is supported by metal squares commonly known as bata-kaku in the shape of a 4-meter base, and when a metal detector is used to detect the box placed between the formwork, metal There were many problems in that the position of the box between the formworks could not be detected because the metal flap corner closest to the detector would react.

Furthermore, when the box is made of resin, a metal member is attached to the appropriate position of the box, and its position is detected in the same manner as with a metal box.

The present invention solves the above-mentioned problems and makes it possible to detect the detection tool attached to the box from the outside of the formwork, and also makes it possible to tightly fix the box opening to the formwork by using the detection tool. This was done with the aim of improving work efficiency.

[Means for solving problems]

The present invention is a method for closely fixing a box opening surface to a formwork by magnetically detecting a tool to be detected attached to a box, the method comprising:
The base end of the main body is provided with a mounting part that is attached to the bottom plate of the box, and the tip part is provided with a connecting part that is connected to a pulling tool for pulling the box toward the formwork. A box equipped with a device to be detected that is equipped with a magnetic part that emits lines of magnetic force is placed between the molds, and a magnetic detector is used to locate the device that is emitting lines of magnetic force from the magnetic part from outside the formwork. Drill an insertion hole in the formwork in the area where the tool to be detected is located, and insert the tip of the pulling tool inserted into the formwork through the insertion hole into the tip of the tool to be detected attached to the box. The box opening surface is closely fixed to the formwork by connecting the device to be detected and drawing the device to be detected toward the formwork.The device to be detected attached to the box is magnetically detected and the box opening surface is brought into contact with the formwork. This is a method of closely fixing.

〔Example〕

Embodiment 1 of the present invention is shown in FIGS. 1 to 4. First, the detected device A1 used in this embodiment will be explained. It also functions as a tool.

This detected tool A1 has a seat plate 2 at the base end of a cylindrical main body l.
is provided, and a male screw portion 5 is provided which is screwed into the bottom plate 4 of the outlet box 3 from the seat plate 2 toward the base end, and a pulling bolt constituting a pulling tool from the center of the main body 1 toward the tip. 6 (see FIG. 4(c)) is provided with a female screw portion 7 which is screwed and connected to the main body 1, and a cylindrical magnet M is embedded in the main body 1. The tip of the main body 1 is largely chamfered.

A seat part 8 is provided at the center of the bottom plate 4 of the outlet box 3 to protrude inward, and a female screw part 9 provided on the seat part 8 and a male thread part provided at the base end of the detected tool A are connected to each other. The threaded part 5 is screwed together, and thus the outlet box 3
The detection tool A is attached inside.

In the example shown in FIG. 4, an outleft box 3 is attached to the lower end of the conduit P, and the formwork 11 is erected after the conduit P is tied to nearby reinforcing bars 10 at several locations.

In this state, as shown in FIG. 4(a), when the position of the detected device A1 installed in the outleft Ponox 3 is detected using the magnetic detector 12 for detecting the location where magnetism is generated. , the magnetic field lines are emitted toward the formwork 11 from the magnet M buried in this detection tool A, so the metal that is closest to the magnetic detector 12 and supports the formwork 11 Only the detected tool A, which is emitting magnetic lines of force by the magnetic detector 12 without reacting to the flapping angle (not shown) of the device, is detected.

Then, mark the position S where the lines of magnetic force are emitted on the formwork 11, and use a drill (not shown) to drill the insertion hole 13 for the pull bolt 6 at this position S [Fig. 4 (B)]
].

Next, as shown in FIG. 4(C), the drawing bolt 6 is inserted into the formwork 11 through the insertion hole 13 drilled in the formwork 11, and its tip is connected to the female screw part 7 of the detected tool A1. At the same time, when the napht 14 is screwed onto the drawing bolt 6 and tightened, the detected tool A is drawn toward the formwork 11 and the opening surface of the outleft box 3 is brought into contact with the inner surface of the formwork 11. In close contact. The outlet box 3 is now tightly fixed to the formwork 11. When the tool to be detected A1 is drawn to the inner surface 11a of the formwork 11 by the pulling bolt 6, the tip of the main body 1 of the tool to be detected AI comes into contact with the inner surface 11a of the formwork 1, so that the tool to be detected A1 is outleft. box 3
The out left box 3 functions as a support member for the bottom plate 4 of the out left box 3, and the bottom plate 4 of the out left box 3 does not bend inward due to the drawing force of the drawing bolt 6.

In this state, concrete C is poured between the formwork 11,
After the concrete C hardens, the formwork 11 is removed, and
When the detected tool AI is removed from the outleft box 3, the outlet box 3 is buried in the concrete wall W, as shown in FIG. 4(d).

Further, FIG. 5 shows another detected tool A2 used for carrying out the present invention, and this detected tool A2 has a ring-shaped magnet M fitted on the outside of the tip of the main body 1. It is something that

A second embodiment of the present invention is shown in FIGS. 6 to 9.

The detected tool A3 shown in FIG. 6 and FIG. is provided with a hook portion 24 for hooking the hook portion 23a of the hook bolt 23, which is narrower than other portions and constitutes the attracting tool, and this hook is provided with a magnet M on the top and bottom of the portion 24. It is of a buried configuration.

A seat 25 is provided in the center of the bottom plate 4 of the out left box 3.
is provided to protrude outward, and a female screw portion 26 provided on this seat portion 25 and a male screw portion 22 provided on the base end portion of the detected tool A3 are screwed together, whereby the outleft box 3 The detected tool A3 is attached inside.

Further, the detected tool A4 shown in FIG. 8 has the same structure as the detected tool A3 except that a magnet M is embedded in the center of the hook portion 24. By embedding a magnet M in the center of the hook part 24, the detection tool A4 attached from the outside of the formwork 11 into the outlet box 3 can be caught in the hook part 24.
4 to make it easier to detect.

In the example shown in FIG. 9, the outlet box 3 is attached to the lower end of the conduit P as in the first embodiment, and after the conduit P is tied to nearby reinforcing bars 10 at several places,
Formwork 11 was constructed.

In this state, as shown in FIG. 9(a), when the position of the detected tool A4 installed in the outlet box 3 is detected using the magnetic detector 12 for detecting the location where magnetism is generated, Magnet M embedded in this detected tool A4
Since magnetic lines of force are emitted toward the formwork 11,
Only the detected tool A4 is located closest to the magnetic detector 12 and emits magnetic lines of force by the magnetic detector 12 without reacting to the metal flap angle (not shown) supporting the formwork 11. is detected.

Then, mark the position S where the lines of magnetic force are emitted on the formwork 11, and use a drill (not shown) to drill the insertion hole 13 for the hook bolt 23 at this position S [FIG. 9(B)]
].

Next, as shown in FIG. 9(c), the hook bolt 23 is inserted into the insertion hole 13 drilled in the formwork 11, and the hook portion 23a at the tip thereof is inserted into the detected tool A.

The hook is hooked on the part 24, and this hook bolt 2
3 and tighten the nut 14, the detected tool A4
is attracted to the inner surface 11a of the formwork 11, and the opening surface of the outlet box 3 is brought into close contact with the formwork 11. The outleft box 3 is now tightly fixed to the formwork 11.

In this state, concrete C is poured between the formwork 11,
After the concrete C hardens, the formwork 11 is removed, and
When the detected tool A4 is removed from the outlet box 3, the outleft box 3 is buried in the concrete wall W, as shown in FIG. 9(d).

Further, FIG. 10 shows another detected tool A5 used for carrying out the present invention.

, flanges 28 are provided at the upper and lower ends of the proximal end of the inverted U-shaped main body 27, and the flange portions 28 are provided in close contact with the bottom plate 4 of the outleft box 3, and the hook provided at the tip is located at the center of the portion 24. It has a configuration in which a magnet M is embedded, and is attached to the outleft box 3 using two fixing screws.

In addition, the main body 1.
By embedding a separate magnet M in 21.27, it is also possible to create a structure in which the detection tool itself is magnetized and emits magnetic lines of force without configuring a magnetic part that emits lines of magnetic force toward the formwork 11. be.

〔Effect of the invention〕

The present invention installs a detection tool equipped with a magnetic part that emits magnetic lines of force toward the formwork in a box placed between the formwork,
The position of the tool to be detected, which is emitting magnetic lines of force from the magnetic part, is detected from outside the formwork using a magnetic detector, and an insertion hole is drilled in the formwork in the area where the tool to be detected is located. This method connects the tip of the pulling tool inserted into the formwork to the tip of the tool to be detected attached to the box, draws the tool to be detected toward the formwork, and fixes the box opening surface tightly to the formwork. Therefore, the magnetic detector detects only the detected tool attached to the box, without reacting to the so-called metal corner that supports the outside of the formwork or the metal objects around the box. It is possible to detect a positive value, and the efficiency of the work of closely fixing the box opening surface to the formwork can be significantly improved.

[Brief explanation of drawings]

FIG. 1 shows a detected tool A used in the first embodiment of the present invention.
1, FIG. 2 is a partially cut away perspective view, and FIG.
4(a) to 2) are cross-sectional views of the state in which the detected device AI is installed in the out left box 3.
2 is a cross-sectional view showing the work process of detecting the position of the outlet box 3 using a magnetic detector 12 and closely fixing the outlet box 3 to the formwork 11. FIG. A cross-sectional view showing the position of tool A being detected by the magnetic detector 12; (B) shows the state in which the insertion hole 13 for the drawing bolt 6 is drilled in the formwork 11 after detecting the tool AI to be detected. The cross-sectional view (C) is a cross-sectional view of the state in which the outlet box 3 is closely fixed to the formwork 11 using the pull bolts 6 and nuts 14, and concrete C is poured between the formwork 11. D) is the formwork 11 and the detected tool A after pouring the concrete C. 5 is a partially cutaway perspective view of another detected tool A2 used for carrying out the present invention,
6 is a perspective view of the detected device A, FIG. 7 is a sectional view of the detected device A installed in the outlet box 3, and FIG. 8 is a perspective view of the detected device A according to the second embodiment of the present invention. The perspective view of the detected device A4 used in FIGS. 2 is a cross-sectional view showing the work process of closely fixing this outlet box 3 to the formwork 11, and FIG. (B) is a cross-sectional view of the state in which the insertion hole 13 of the hook bolt 23 is drilled in the formwork 11 after the outlet box 3 has been detected, and (C) is a cross-sectional view of the state in which the hook bolt 23 and the nut are 14 is used to tightly fix the outleft box 3 to the formwork 11 and concrete C is poured between the formwork 11. 11 and the detected device A are removed, and FIG. 10 is a sectional view of the outlet box 3 in which still another detected device As used for carrying out the present invention is installed. Explanation of symbols of main parts] A, ~As: Device to be detected M: Magnet (magnetic part) P; Conduit 1.21.27 4 Main body of device to be detected 3 Near outlet box (box) 4: Out left box Bottom plate 5.21 Male screw part (attachment part) of detected tool 6: Pulling port (pulling tool) 7: Female thread part (connecting part) of detected tool 11: Formwork 12: Magnetic detector 13: Insertion Hole 14: Nand 23: Hook bolt (pulling tool) 24: Hook part of detected tool (connection part) 28: Flange part of detected tool (mounting part) 29: Fixing screw Fig. 1 Fig. 2 Fig. 3 Figure (c) Figure 4 (d) (See No. 9 qnq- Figure (b) (c)

Claims (1)

[Claims] This method uses magnetic detection to magnetically detect a device to be detected attached to a box to tightly fix the box opening to the formwork. The box is equipped with a connecting part connected to a pulling tool for drawing the box to the formwork, and a box equipped with a detection tool having a magnetic part that emits lines of magnetic force toward the formwork is placed between the formwork. The position of the tool to be detected, which is emitting magnetic lines of force from the magnetic part, is detected from outside the formwork using a magnetic detector, and an insertion hole is drilled in the formwork in the area where the tool to be detected is located. The tip of the pulling tool inserted into the formwork through the insertion hole is connected to the tip of the detected tool attached to the box, and the box opening surface is brought into close contact with the formwork by pulling the detected tool toward the formwork. A method of magnetically detecting a device to be detected attached to a box and fixing the opening surface of the box closely to a formwork.