JP2023156697A - Opening closing tool - Google Patents

Abstract

To provide an opening closing tool excellent in versatility which is easy to attach/detach along a surrounding of a pipe, flexibly corresponds to an external diameter of the pipe, and is capable of closing gap openings formed around the pipe.SOLUTION: A locking shaft 3 is provided in a projection manner on one end side of a flat plate body so as to be orthogonal to a surface of the flat plate body, and is provided with a plurality of closing unit plates 2 where long slide holes 2c is formed on the other end side of the flat plate body. The locking shaft 3 of a first closing unit plate 2A is put through the slide hole 2c of an adjacent second closing unit plate 2B to be coupled, similar coupling is repeated successively until the locking shaft 3 of the last closing unit plate 2D is put through the slide hole 2c of the first closing unit plate and an annular closing body 1 is formed in a plan view in the state that adjacent edges of the respective closing unit plates are overlapped. A pipe Pa is put through a central part of the closing body, and gap openings formed around the pipe are covered with the closing body 1.SELECTED DRAWING: Figure 1

Description

This invention secures the safety of construction workers by temporarily closing openings made in concrete floors (floor slabs) to allow pipes for equipment to pass through, for example in buildings under construction. The present invention relates to an orifice obturator that can be used.

In a reinforced concrete building that is under construction, openings are formed in a portion of the concrete floor during the concrete floor construction stage to allow pipes for water, sewage, electricity, gas, and other equipment to pass through.
Therefore, when the pipe is passed through the opening, a relatively wide gap is formed between the pipe and the opening in the concrete floor through which it passes, and as the construction progresses, the gap opens. It will take several days before the opening is covered with a closing material such as mortar.
During this period, workers engaged in construction work may get caught in the gap opening, or may accidentally drop construction materials or tools into the gap opening, causing damage to workers on lower floors. Inconveniences such as danger may also occur.

In order to solve the above-mentioned problem, measures may be taken such as cutting wood, which is often used as a construction material, into an appropriate size and creating a closing board on site to cover the above-mentioned gap opening. be. However, this measure lacks reliability in ensuring safety for workers because the closing plate easily shifts due to vibration or external force.
It is also possible to take measures such as surrounding the piping with architectural steel plates, metal mesh plates, etc. and tying them with wire, etc., but this requires time and effort, and removing it is also a hassle. This results in deterioration of work efficiency.

On the other hand, in Patent Document 1, as shown in FIG. 6, by embedding a cylindrical sleeve 32 in the floor 31 of each floor of a building, openings 33 for vertically passing the pipe P through each floor are formed. An example is shown.
Then, by placing a cap 34 surrounding the pipe P on the floor 31 of each floor with the pipe P vertically passing through the opening 33, a gap opening (as described above) is created between the sleeve 32 and the pipe P. (indicated by the same reference numeral 33 as the opening) is covered by the cap 34.

According to this configuration, the embedded position of the sleeve 32 in each level may shift on the vertical line, and the pipe insertion hole formed in the cap 34 arranged in each level is adjusted according to the shift in the embedded position of the sleeve 32 in each level. It is explained that it is necessary to adjust the positions of 35 individually [see paragraph [0061] of Patent Document 1].
By performing the above-mentioned adjustment, the gap opening 33 between the opening 33 of the sleeve 32 and the pipe P on each floor can be closed with the cap 34, so that workers engaged in construction work can However, it is expected that the problem of getting caught in the gap opening 33 and the problem of dropping construction materials, tools, etc. into the gap opening 33 can be expected to be solved.

JP 2018-3957 Publication

By the way, as disclosed in Patent Document 1, when trying to adopt a configuration in which the cap 34 covers the gap opening 33 around the pipe P, it is necessary to avoid misalignment between the sleeve 32 and the pipe P at each level. It is necessary to take measures such as measuring the conditions of the gap openings 33 and individually setting the positions for drilling the pipe insertion holes 35 in the flat material that will become the cap 34 based on the measurement results.
Therefore, the measurement of the individual gap openings and the drilling operation for the cap material become a burden, which leads to a deterioration in the work efficiency of construction work, and there is still room for improvement.

This invention aims to solve the above-mentioned problems, and it is easy to attach and detach along the circumference of the pipe, and even if the outer diameter of the pipe is changed, it can flexibly correspond to the outer diameter of the pipe. It is an object of the present invention to provide a highly versatile opening closing tool capable of closing a gap opening formed around a pipe.

The opening closure device according to the present invention, which has been made to solve the above-mentioned problems, has a locking shaft protruding from one end side of a flat plate so as to be orthogonal to the surface of the flat plate. A plurality of closing unit plates each having an elongated slide hole formed on the other end side are provided, and the locking shaft of the first closing unit plate is connected to the sliding hole of the adjacent second closing unit plate. By repeating the same connection one after another, the locking shaft of the last closing unit plate is passed through the slide hole of the first closing unit plate, thereby connecting the adjacent closing unit plates. The edges are overlapped to form an annular closure in a plan view, a pipe is passed through the center of the closure, and a gap opening formed around the pipe is covered with the closure. Features.

In this case, it is preferable that a bolt be used as the locking shaft, and that the position of the bolt relative to the slide hole of the adjacent closing unit plate can be fixed by tightening a nut screwed onto the bolt.

In addition, it is preferable that each of the closing unit plates has a recessed portion that is arc-shaped or obtuse-angled in plan view at a position surrounding the piping.

According to the opening closure device according to the present invention, a plurality of closure unit plates each having a locking shaft and a slide hole are connected in a ring shape in a plan view using each other's locking shaft and slide hole. A shaped blockage is formed. Then, a pipe is passed through the center of the closure, and a gap opening formed around the pipe can be covered with the closure.

The donut-shaped closure body described above can be connected and separated by attaching and detaching the locking shaft to the slide hole of the adjacent closure unit plate, and can be connected and separated by selecting the position of the locking shaft with respect to the slide hole. The diameter of the pipe through hole formed in the center of the pipe can be changed.

Therefore, according to the opening closure device of the present invention, it is easy to attach and detach along the circumference of the pipe, and even if the outer diameter of the pipe is changed, it can be formed around the pipe in a manner that flexibly corresponds to the outer diameter of the pipe. Therefore, it is possible to provide a highly versatile opening closing tool that can close a gap opening.

FIG. 2 is a plan view showing an example in which the opening closure device according to the present invention is attached to a thick pipe. FIG. 3 is a plan view showing an example in which the opening blocker is attached to a thin pipe. FIG. 3 is a plan view showing a single structure of a closing unit plate forming an opening closing device. FIG. 3 is a sectional view showing a first connection form of the closing unit plate. FIG. 7 is a sectional view showing a second connection form of the closing unit plate. FIG. 2 is a sectional view showing a conventional example of covering a gap opening around a pipe installed in a building.

The opening obturator according to the present invention will be described based on the embodiment shown in the drawings.
FIG. 1 shows an example in which the opening closure device 1 is installed so as to surround a thick pipe Pa, and FIG. 2 shows an example in which the opening closure device 1 is installed in a plan view so as to surround a thin pipe Pb. ing.
In the opening obturator 1 shown in this example, a plurality of (four in the illustrated example) closing unit plates 2 having the same configuration are connected in an annular manner to form a donut-shaped obturator (same as the opening obturator) in plan view. (indicated by reference numeral 1), and is installed with the above-mentioned thick pipe Pa or thin pipe Pb passed through the pipe passage hole 1a formed in the center of the closure body 1.
Thereby, the gap opening 33 formed around the pipe P shown in FIG. 6, which has already been explained, can be covered by the closing body 1.

FIG. 3 shows a plan view of the single unit structure of the closing unit plate 2, and the closing unit plate 2 is preferably a flat plate made of a metal material. A recessed portion 2a having an obtuse angle in plan view is formed as if a part of a corner of a rectangular (rectangular) flat plate body was cut away.
When the closing unit plates 2 are connected in an annular manner as shown in FIGS. 1 and 2, the obtuse-angled concave portion 2a is provided at a position surrounding the cylindrical pipes Pa and Pb, and This forms a through hole 1a. When the obtuse-angled recess 2a passes through a particularly thick pipe Pa, the recess 2a is positioned along the outside of the pipe Pa as shown in FIG. It works to narrow the gap. Therefore, the same effect can be expected by replacing the obtuse-angled recess 2a with an arc-shaped recess.

Furthermore, a locking shaft 3 is provided protruding from one end of the closing unit plate 2 in the longitudinal direction (the left side as shown in FIG. 3) so as to be orthogonal to the surface of the closing unit plate 2.
As this locking shaft 3, a bolt (indicated by the same reference numeral 3 as the locking shaft) is used. The bolt 3 is disposed with its tip portion protruding upward from the top. Note that, as shown in FIG. 4 or 5, the head 3A of the bolt 3 is preferably fixed to the closing unit plate 2 by welding or the like on the back surface of the closing unit plate 2.

On the other hand, on the other end side in the longitudinal direction of the closing unit plate 2 (on the right side as shown in FIG. 3), an elongated slide hole 2c is formed so as to cross obliquely with respect to the longitudinal direction of the closing unit plate 2. It is formed in a straight line. The tip of a bolt 3 as a locking shaft attached to an adjacent closing unit plate 2 is inserted into this slide hole 2c, and the four closing unit plates 2 are arranged in an annular shape as shown in FIGS. 1 and 2. Concatenated.

The upper left closing unit plate 2 in FIGS. 1 and 2 is called the first closing unit plate 2A, and in order counterclockwise, the second closing unit plate 2B, the third closing unit plate 2C, and the fourth closing unit plate. Let's call it 2D.
In this embodiment, a locking shaft (bolt 3) protruding from the first closing unit plate 2A is passed through the slide hole 2c from the back side of the adjacent second closing unit plate 2B. , the first and second closing unit plates 2A, 2B are connected. Thereby, the adjacent edges of the second closing unit plate 2B are connected to the first closing unit plate 2A in a state where they are overlapped on the upper side.

A first connection form shown in FIG. 4 is adopted for the connection portion between the first and second closing unit plates 2A and 2B. In this first connection form, a washer 4 is attached to a bolt 3 as a locking shaft protruding from the upper surface of the front side closing unit plate 2B, and a hexagonal nut 5 is further screwed into the bolt 3.
Then, the hexagonal nut 5 is fixed to the tip of the bolt 3 by welding or the like in a state where the hexagonal nut 5 is not tightened but is slightly loosened. Thereby, the bolt 3 protruding from the first closing unit plate 2A is slidably connected to the slide hole 2c of the second closing unit plate 2B.

Similarly to the above, the first connection form shown in FIG. 4 is adopted in the connection portion between the third and fourth closing unit plates 2C and 2D. Thereby, the bolt 3 of the third closing unit plate 2C is slidably connected to the slide hole 2c of the fourth closing unit plate 2D.

Further, as shown in FIGS. 1 and 2, a locking shaft (bolt 3) protruding from the second closing unit plate 2B is inserted into the slide hole 2c from the back side of the adjacent third closing unit plate 2C. By being passed through, it is connected to the second and third closing unit plates 2B and 2C. Thereby, the adjacent edges of the third closing unit plate 2C are connected to the second closing unit plate 2B in a state where they are overlapped on the upper side.

A second connection form shown in FIG. 5 is adopted for the connection portion between the second and third closing unit plates 2B and 2C. In this second connection form, a washer 4 is attached to a bolt 3 as a locking shaft protruding from the upper surface of the front side closing unit plate 2C, and a wing nut 6 is further screwed.
In the connection portion between the fourth and first closing unit plates 2D and 2A, the second connection form using the wing nut 6 shown in FIG. 5 is adopted in the same manner as described above.
Thereby, the first to fourth closing unit plates 2A to 2D are connected in an annular manner as shown in FIGS. 1 and 2.

The wing nut 6 used in the second connection type can be manually tightened and untightened, as is well known.
Therefore, when the closure body 1 is to be installed along the circumference of the pipe Pa or Pb, the first and second closure unit plates 2A, 2B, and the third and fourth closure units are connected to each other. The plates 2C and 2D are arranged facing each other along the outer periphery of the pipe Pa or Pb. Then, as shown in FIG. 5, wing nuts 6 are screwed onto bolts 3 as locking shafts protruding from the upper surfaces of the first and third closing unit plates 2A and 2C via washers 4, respectively.

In this state, the position of the bolt 3 with respect to each slide hole 2c of each closing unit plate 2A to 2D is adjusted so that the pipe passage hole 1a formed by each closing unit plate 2A to 2D is preferably connected to the pipe Pa or Pb. The wing nuts 6 are set so as to touch along the outer periphery, and in this state, the aforementioned tightening operation of the wing nut 6 is performed.
As a result, the position of the bolt 3 relative to the slide hole 2c formed in each of the closing unit plates 2A to 2D is fixed, and the closing body 1 can be mounted so as to surround the pipe Pa or Pb. As described above, this can be done by manually tightening the wing nut 6.
Then, in order to remove the opening blocker 1 attached to the pipe Pa or Pb, it is sufficient to perform the operation opposite to the above-described operation.

In the embodiments described above, adjacent closing unit plates are connected in an annular manner using the first and second connection forms shown in FIGS. 4 and 5; You may adopt the connection form using the wing nut 6 shown in FIG.
According to this, the closure body 1 can be disassembled into a single unit structure of the closure unit plate 2, so that handling during transportation and storage can be facilitated.
Furthermore, in the embodiment described above, an example is shown in which four closing unit plates are connected in an annular shape, but this may be done by using a plurality of three or five or more closing unit plates 2 as necessary. The closure body 1 can also be configured by

1 Obturator (opening obturator)
1a Piping through hole 2 Closing unit plate 2a Recessed part 2b Through hole 2c Slide hole 2A First closing unit plate 2B Second closing unit plate 2C Third closing unit plate 2D Fourth closing unit plate 3 Locking shaft ( bolt)
3A Bolt head 4 Washer 5 Hex nut 6 Wing nut Pa Thick piping Pb Thin piping

The opening closing device according to the present invention, which was made to solve the above-mentioned problems, is used to temporarily close an opening provided in a concrete floor (floor slab) for passing pipes in a building under construction. This is an opening closure device that can ensure the safety of construction workers, in which a locking shaft is provided protruding from one end side of a flat plate so as to be perpendicular to the surface of the flat plate, and A plurality of closing unit plates each having an elongated slide hole formed on the other end side of the flat plate body are provided, and the locking shaft of the first closing unit plate is aligned with the locking shaft of the adjacent second closing unit plate. The locking shaft of the last closing unit plate is passed through the slide hole of the first closing unit plate, and each closing unit is connected by passing through the slide hole. Adjacent edges of the plates are overlapped to form an annular closure in plan view, a pipe is passed through the center of the closure, and the gap opening formed around the pipe is filled with the closure. In addition to covering the piping, each of the closing unit plates is characterized in that a concave portion having an arcuate shape or an obtuse angle in a plan view is formed at a position surrounding the piping.

The opening closure device according to the present invention, which has been made to solve the above-mentioned problems, is used in a building under construction to connect an opening provided in a concrete floor (floor slab) or the like for passage of pipes and the opening. This is an opening closure device that can ensure the safety of construction workers by temporarily covering the gap opening formed between the outer periphery of the pipe passing through the pipe. A locking shaft is provided to protrude perpendicularly to the surface of the flat plate body, and a plurality of closing unit plates each having an elongated slide hole formed on the other end side of the flat plate body are provided. The locking shaft of the second closing unit plate is passed through the slide hole of the adjacent second closing unit plate, and a nut is screwed onto the locking shaft to connect the locking shaft , and the same connection is repeated one after another until the final The locking shaft of the closing unit plate is passed through the slide hole of the first closing unit plate, and a nut is screwed onto the locking shaft , so that adjacent edges of each closing unit plate are overlapped. , a closing body having an annular shape in a plan view is formed; further, each of the closing unit plates has an arc-shaped or obtuse-angled concave portion formed in a position surrounding the piping in a plan view; By being arranged so as to surround the pipe, a pipe passage hole is formed by the arc-shaped or obtuse-angled recess, and the pipe is mounted so as to pass through the pipe passage hole in the center of the annular closure body, A ring-shaped closure is placed on a concrete floor (floor slab), etc., and is formed between an opening provided in the concrete floor (floor slab), etc. and the outer periphery of the pipe passing through the opening. The gap opening is covered with the annular closing body .

Claims (3)

A plurality of closing units each having a locking shaft protruding from one end of the flat plate so as to be perpendicular to the surface of the flat plate, and a long slide hole formed at the other end of the flat plate. A board is provided,
The locking shaft of the first closing unit plate is connected by passing through the slide hole of the adjacent second closing unit plate, and the locking shaft of the last closing unit plate is connected by repeating the same connection one after another. is passed through the slide hole of the first closure unit plate, so that adjacent edges of each closure unit plate are overlapped to form an annular closure body in plan view,
An opening closure device characterized in that a pipe is passed through a central portion of the closure body, and a gap opening formed around the pipe is covered with the closure body. 2. A bolt is used as the locking shaft, and the position of the bolt relative to the slide hole of an adjacent closing unit plate can be fixed by tightening a nut screwed onto the bolt. orifice obturator. 3. The opening closure device according to claim 1, wherein each of the closure unit plates has a recessed portion that is circular arc-shaped or obtuse-angled in plan view at a position surrounding the pipe.

Images