JPS6375256A - Apparatus for detecting and fixing space forming box arranged between mold frames - 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] [Industrial Application Field] The present invention relates to a void space placed between formworks to form a void space for burying a distribution board, wiring box, etc. within a concrete wall. The present invention relates to a device for magnetically detecting the position of a forming box and tightly fixing the cavity forming box to a formwork.

[Conventional technology]

A cavity forming box is placed in a formwork to form a cavity for burying a distribution board, wiring box, etc. in a concrete wall, and is usually made of wood.

In order to bury a cavity forming box in a predetermined position within a concrete wall, the opening of the cavity forming box must be firmly attached and fixed to the inner surface of the formwork before concrete is poured. Concrete flows into the cavity forming box from the opening due to concrete placement pressure.

Therefore, after the formwork is erected, the position of the cavity forming box is detected from the outside of the formwork, an insertion hole is drilled in the formwork in the part where the cavity formation box is located, and it is inserted into the formwork through this insertion hole. The drawn pulling tool must be connected to a fixture such as a Nando attached to the cavity forming box to draw the cavity forming box toward the formwork and fix the cavity forming box to the inner surface of the formwork.

The outside of the formwork is supported vertically and horizontally by metal squares commonly known as back corners, and if the fixtures attached to the cavity forming box are located behind the back corners, There is a problem in that it is not possible to find a fixing tool, and furthermore, the back angle is an obstacle and it is not possible to drill an insertion hole for a pulling tool in the formwork.

Further, since the cavity forming box is used to form a cavity in a concrete wall for burying a distribution board, a wiring box, etc., it has a considerable size. Therefore, when fixing the cavity forming box to the formwork at only one location, the fixing strength is insufficient and the box cannot withstand the concrete pouring pressure.

When detecting a fixture attached to a cavity forming box, if the fixture is made of metal, a metal detector should be able to detect the position of the fixture, but the outside of the formwork is It is supported in the shape of a base, and if you try to detect the fixture attached to the cavity forming box using a metal detector, the metal back angle closest to the metal detector will react, so the mold There is a problem in that the exact position of the fixture attached to the cavity forming box within the frame cannot be detected.

[Problem that the invention seeks to solve]

In view of the above-mentioned problems, the present invention is capable of detecting other detected tools even if the detected tool is located directly behind the back angle by attaching a plurality of detected tools to a cavity forming box. This makes it possible to detect the position of the cavity forming box, and by magnetically detecting multiple detection tools attached to the cavity forming box, it is possible to detect the position of the cavity forming box. This was done with the promise that the equipment to be detected would be detected without incident.

[Means for solving problems]

The present invention is a device for magnetically detecting the position of a cavity forming box placed between formworks from outside the formwork and tightly fixing its opening to the inner surface of the formwork. A wooden screw-like male screw portion is provided which is screwed into the bottom plate of the cavity forming box, and a threaded portion is provided at the tip portion to be screwed together with a pulling tool for drawing the cavity forming box to the formwork. In addition, a device to be detected is formed with a magnetic part that emits lines of magnetic force toward the formwork, and a plurality of devices to be detected are screwed and attached to the bottom plate of the cavity forming box. This is a detection and fixing device for cavity forming boxes placed in

〔Example〕

Embodiments of the invention are shown in FIGS. 1-4.

The device to be detected is provided with a seat plate 2 at the base end of a cylindrical main body 1, and is screwed from this seat plate 2 toward the base end into the bottom plate 4 of a hollow space forming box 3 made of wood or plastic. A male screw part 5 in the shape of a wooden screw is provided, and the tip of the main body 1 has a larger diameter than the other parts, and a female screw part 7 to which the pull bolt 6 is screwed is attached to the tip of the main body 1. It has a structure in which a magnet M is fitted on the outside of the tip of the main body. This detected tool A also functions as a fixture for fixing the cavity forming box 3 to the formwork 8.

Due to the reasons explained in the conventional technology section, the cavity forming box 3
A plurality of (five in this embodiment) detection object containers are attached to the bottom plate 4 of the device. When attaching a plurality of tools A to the bottom plate 4 of the cavity forming box 3, two or more tools A to be detected are placed behind each vertical and horizontal back angle 9.10 holding the formwork 8 at the same time. 2 on the same straight line horizontally and vertically so that
It is preferable not to position more than one device A to be detected (see FIGS. 2 and 3). In addition, in order to attach the detected tool A to the bottom plate 4 of the cavity forming box 3, a wooden screw-shaped male screw portion 5 provided at the base end of the detected tool is attached to the bottom plate 4 of the cavity forming box 3. This is done by screwing in.

After attaching the hollow space forming box 3 in which several pieces of detected tools are attached to the bottom plate 4 to the lower ends of several electric conduit pipes P, as shown in FIG. 4(a), the hollow forming box 3 A formwork 8 is erected on the opening side of the frame 8, and the interval between the two opposing formworks 8 is regulated by a spacing regulator 11, and the outside of each formwork 8 is set at each vertical and horizontal back angle 9.
I support it with 10.

After that, as shown in the same figure (a), the positions of several detected tools A attached to the cavity forming box 3 are detected using the magnetic detector 12 for detecting the generation points of magnetic lines of force. When detected, magnetic lines of force are emitted toward the formwork 8 from the magnet M attached to the detection tool A, so the metal that is closest to the magnetic detector 12 and supports the formwork 8 Only the detected tool A that emits magnetic lines of force without reacting to each back angle 9.10 is detected by the magnetic detector 12.

Then, mark each position S where the lines of magnetic force are emitted on the formwork 8, and use a drill (not shown) to drill an insertion hole 13 for the pulling bolt 6 at each position S (see Fig. 4). b)] In the example, since the detected tool A at the lower left end is located behind the intersection of the vertical and horizontal back angles of 9.10,
Although it is not possible to drill the insertion hole 13 in the formwork 8 in this part, the remaining detected tools A are all located between the vertical and horizontal back angles 9.10, so each detected tool A is located. An insertion hole 13 can be bored in the formwork 8 of the part.

Next, as shown in FIG. 4(c), pull bolts 6 are inserted into various through holes 13 drilled in the formwork 8.
When the tip is screwed into the female thread 7 provided at the tip of the detection tool A and tightened with the nut 14, the cavity forming box 3
The opening surface of the detection target A is brought into close contact with the inner surface 8a of the mold 8, and the tip surface of the main body 1 of each detected tool A is brought into contact with the inner surface 8a of the mold 8. The cavity forming box 3 is now tightly fixed to the formwork 8.

In this embodiment, since the front end surface of the main body 1 of the detection tool A is substantially aligned with the opening surface of the cavity forming box 3, the cavity forming box 3 is pulled toward the formwork 8 by the drawing bolt 6. , the tip surface of the main body l of the detection tool A is the inner surface 8 of the formwork 8
a. Therefore, the bottom plate 4 of the cavity forming box 3 is prevented from bending inward due to the pulling force of the pulling bolt 6, and the bottom plate 4 of the cavity forming box 3 is
, the bottom plate 4 of the cavity forming box 3 is prevented from being deformed by the concrete placing pressure.

Next, concrete C is poured between the forms 8, and after the concrete C has hardened, the forms 8 and the void forming box 3 are removed, and the void forming box 3 is arranged as shown in (d). A large empty space 15 for burying a distribution board, wiring box, etc. in the concrete wall W is formed in the area where the concrete wall W was previously installed.

Furthermore, it is also possible to configure the body of the detected tool itself to be magnetized to emit lines of magnetic force, without providing a separate magnet in the main body of the detected tool as in the above embodiments. In addition, in FIG. 4, 16 indicates reinforcing bars.

[Effects of the Invention] According to the present invention, a wooden screw-like male screw portion is provided at the base end of the main body to be screwed into the bottom plate of the cavity forming box, and the cavity forming box is attached to the formwork at the tip end. A plurality of devices to be detected are installed by screwing them into the bottom plate of the cavity forming box, each of which is provided with a screw portion that is screwed together with the drawing device of the drawing device, and is also equipped with a magnetic portion that emits lines of magnetic force toward the formwork. Because of the structure, the magnetic detector does not react to the so-called back angle made of metal that supports the outside of the formwork, or to the metal that exists around the box. Only the tools are detected accurately, and the positions of the plurality of tools to be detected attached to the cavity forming box placed between the molds can be accurately and quickly detected, improving work efficiency.

In addition, since multiple detection tools are attached to the bottom plate of the cavity forming box, even if there is a detection tool located behind the vertical and horizontal flap corners that support the formwork, the remaining detection tools cannot be used. can be detected.

Furthermore, since the detected tools attached to the cavity forming box function as fixing devices, after detecting the position of each detected instrument attached to the cavity forming box, the insertion holes are drilled in the formwork. By inserting a pulling tool into the insertion hole of the lever and screwing this pulling tool into the plurality of detected tools attached to the void forming box, the void forming box can be drawn toward the formwork, and the empty space forming box can be drawn toward the formwork. The pre-formed box can be fastened securely and quickly to the formwork.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a detected tool A according to the present invention, and FIG. 2 shows a state in which a plurality of detected tools A are attached to the bottom plate 4 of a wooden cavity forming box 3. The perspective view, FIG. 3, is a diagram showing the positional relationship between the void forming box 3 placed between the formwork 8 and the vertical and horizontal flap angles 9.10 supporting the formwork 8, and FIG. ) or 2) magnetically detects the position of a plurality of detection tools A attached to a cavity forming box 3 placed between the formwork 8, and this cavity forming box 3 also serves as a fixture. Detected tool A
FIG. 3 is a cross-sectional view showing the work process of fixing to the formwork 8 using a A cross-sectional view of the state in which the position is magnetically detected, (b) is a cross-sectional view of the formwork 8 with the insertion hole 13 for the pulling bolt 6 drilled, and (c) is a cross-sectional view of the formwork 8 with the insertion hole 13 for the pulling bolt 6 being used. A cross-sectional view of the void forming box 3 drawn and fixed to the inner surface 8a of the formwork 8 and concrete C poured between the formworks 8, (d) shows the formwork 8 and It is a sectional view of a state in which a cavity 15 is formed in a concrete wall W by removing the cavity forming box 3. [Explanation of symbols of main parts] A: Device to be detected M: Magnet P: Electrical conduit 1: Main body of device to be detected 3: Cavity forming box 4: Bottom plate of cavity forming box 5: Wooden screw-shaped male screw part (Male thread part) 6: Pulling bolt (pulling tool) 7: Female thread part (thread part) of the detected tool 8: Formwork 12: Magnetic detector 15: Blank space Figure 1 Figure 2 M, Figure 3 Figure 4 (A)

Claims (3)

[Claims] (1) A device for magnetically detecting the position of a cavity forming box placed between formworks from outside the formwork and tightly fixing its opening to the inner surface of the formwork, with a cavity formed at the base end of the main body. A wooden screw-like male screw portion is provided to be screwed into the bottom plate of the forming box, and a screw portion is provided at the tip portion to be screwed together with a pulling tool for drawing the cavity forming box to the formwork. A device to be detected is arranged between the formworks, characterized in that a device to be detected is configured to include a magnetic part that emits lines of magnetic force toward the formwork, and a plurality of devices to be detected are screwed and attached to the bottom plate of the cavity forming box. A device for detecting and fixing hollow space forming boxes. (2) Claim 1, characterized in that the magnetic part is constructed by providing a separate magnet in the main body of the detected tool.
A device for detecting and fixing a cavity forming box placed between formworks as described in Section 1. (3) A device for detecting and fixing a cavity forming box placed between formworks as set forth in claim 1, wherein the magnetic part is constructed by magnetizing the main body of the detection tool itself.