JP2021081065A - Filler holding tool for open hole - Google Patents

Abstract

To provide a filler holding tool for an open hole having improved workability at the site.SOLUTION: A filler holding tool 1 for an open hole comprises: a cylinder part 2 that is inserted into an open hole H, and in which a sheet flexible enough to be twisted and deformed is formed into a cylindrical shape; and a frame part 3 that is provided on at least one of the cylinder part 2 along a circumferential direction, can contract its diameter according to the inner peripheral surface of the open hole H, and has restoring force to an original state when it is in a diameter contraction state. In a state where the frame part 3 is in contact with an inner peripheral surface Hs of the open hole H, the twisted cylinder part 2 is in contact with a flowable filler F arranged in the open hole H.SELECTED DRAWING: Figure 3

Description

The present invention relates to a through-hole filler holder used by inserting it into a through-hole.

The through hole penetrating the floor or wall of a building or the like is filled with a filler (for example, mortar) to fill the space of the through hole. Fillers are often fluid when placed in through holes. Therefore, for example, the sheet-shaped gap closing body described in Patent Document 1 is used at the time of construction. This gap closing body is attached to the lower outer surface of the floor slab having a through hole, and the lower end of the through hole is closed except for a portion through which a long body such as a pipe passes, and the filler is closed in that state. Can be put in the space of. As a result, since the gap closing body holds the filler, the space where the elongated body does not exist in the through hole is filled with the filler.

Japanese Unexamined Patent Publication No. 2018-44660

However, when such a sheet-shaped gap closing body is used, the lower outer surface of the floor slab becomes the ceiling side of the work space when the work is performed from below, and is a high place. The sex is not good.

Therefore, an object of the present invention is to provide a filler holder for a through hole with improved workability in the field.

INDUSTRIAL APPLICABILITY The present invention is used by inserting into a through hole, and is formed into a tubular portion having a sheet that is flexible enough to be twisted and deformed, and the tubular portion along the circumferential direction at least in the axial direction. The frame portion is provided with a frame portion that can be reduced in diameter according to the inner peripheral surface of the through hole and has a restoring force to the original state in the reduced diameter state, and the frame portion is inside the through hole. A through-hole filler holder in which the twisted tubular portion is in contact with a fluid filler arranged in the through-hole in a state of being in contact with the peripheral surface.

According to this configuration, by inserting into the through hole and twisting the tubular portion, the tubular portion whose position is held by the frame portion holds the filler. Therefore, the filler holder for the through hole can be inserted from either one side or the other side of the through hole.

Further, the frame portion may have a divided portion divided in the circumferential direction and may have a C-shape in the radial cross section.

According to this configuration, the frame portion is deformed so that the C-shape changes, so that the frame portion can follow the inner surface of the through hole.

Further, the frame portion may have a friction portion on the outer periphery that makes it difficult to slip with respect to the inner peripheral surface of the through hole when the tubular portion is twisted.

According to this configuration, since the frame portion has the friction portion, the tubular portion can be reliably twisted.

Further, the frame portion is provided on one side and the other side in the axial direction, is connected to one of the frame portions, and is in contact with the outer surface around the through hole, and the outer surface and the frame portion are in contact with the outer surface. It is also possible to have a stopper that keeps the distance to and from constant.

According to this configuration, the stopper can make the position where the tubular portion holds the filler inside the through hole constant.

In the present invention, the filler holder for through holes can be inserted from either one side or the other side of the through hole. Therefore, the workability in the field is improved, and the compatibility with through holes having various sizes is good.

It is a perspective view which shows the filler holder for a through hole which concerns on one Embodiment of this invention. It is a perspective view which shows the state before the cylinder part is twisted in the process of inserting the filler holder for a through hole into a through hole. It is a perspective view which shows the state which put the mortar after inserting the filler holder for a through hole into a through hole where a long body is arranged, twisting a cylinder part. Both (a) and (b) are side views showing an example of a frame portion provided with a stopper (the cylinder portion is not shown). Both (a) and (b) are plan views showing an example of a frame portion provided with a friction portion (the cylinder portion is not shown). It is a perspective view which shows the filler holder for a through hole which is the other embodiment of this invention and is the form which extended the cylinder part in the circumferential direction.

Next, the filler holder for through holes of the present invention will be described by taking up one embodiment.

The filler holder 1 for a through hole of the present embodiment has a tubular shape as shown in FIG. The filler holder 1 for a through hole mainly includes a tubular portion 2 and a frame portion 3.

The tubular portion 2 is formed by forming a flat sheet into a tubular shape. The tubular portion 2 of the present embodiment has a slit-shaped tubular portion-side cut portion 21 that is cut (divided) in the circumferential direction. The tubular portion side cutting portion 21 extends in the axial direction. Therefore, the tubular portion 2 has a C-shaped cross section (diametrical cross section) orthogonal to the axial direction. However, the tubular portion side cutting portion 21 may not be provided and the cross section may be O-shaped. Further, in the tubular portion 2, one side portion in the circumferential direction facing the tubular portion side cutting portion 21 and the other side portion may overlap in the radial direction so that the slit is not exposed (see, for example, FIG. 6). .. Further, in the present embodiment, the tubular portion side cutting portion 21 is provided at one location, but may be provided at two or more locations.

A flexible material is used as the sheet used for the tubular portion 2. This sheet is made of fire resistant, heat resistant and flame resistant material. In addition to these, the filler F used (for example, mortar) needs to be formed of a material that does not pass through in the thickness direction. Specific examples of the material include a ceramic wool sheet, a refractory foam (foam foam), a heat-expandable butyl tape, an aluminum glass film, or an aluminum glass cloth. Further, it may be a composite material of a reinforcing material made of a linear body or a net-like body and a sheet material. In particular, in a material having a reinforcing material, the bending strength can be improved, so that it is possible to reduce that the twisted tubular portion 2 in contact with the filler F is bent due to the weight of the filler F.

The tubular portion 2 needs to be flexible enough to be twisted and deformed in the circumferential direction. Regarding flexibility, the sheet has flexibility such that the surface (front surface, back surface) of the sheet is twisted when the sheet is flat, and in particular, 360 in the circumferential direction in the state of being molded as the tubular portion 2. It is desirable to have the flexibility to twist more than a degree. Further, as shown in FIG. 3, the inner peripheral surface of the tubular portion 2 is smooth enough to slide at least in the axial direction when it comes into contact with the elongated body L (pipe, cable, etc.) passing through the through hole H. It is desirable to have. Further, it is desirable that the sheet used for the tubular portion 2 is made of a nonflammable material when the through-hole filler holder 1 is attached to the through-hole H provided in the fireproof section. In addition, when the expansion material described later is used, a non-flammable material such as paper can also be used.

The frame portion 3 is provided along the circumferential direction on at least one of the tubular portions 2 in the axial direction. In the present embodiment, the frame portion 3 is provided integrally with the tubular portion 2 at both ends of the tubular portion 2 in the axial direction. Further, the frame portion 3 is provided outside the diameter of the tubular portion 2. The frame portion 3 has an annular shape in the axial direction, and for example, a hard resin ring or a metal ring is used. The frame portion 3 may be adhered to the tubular portion 2 or may be attached to the tubular portion 2 by a fastener such as a pin. The frame portion 3 can be reduced in diameter according to the inner peripheral surface of the inner peripheral surface Hs (see FIG. 3) of the through hole H, and has a restoring force to the original state in the reduced diameter state.

The frame portion 3 of the present embodiment has a frame portion side cutting portion 31 as a dividing portion, which is cut (divided) in the circumferential direction. The frame portion side cutting portion 31 extends in the axial direction. The frame portion side cutting portion 31 is formed at one position continuous with the cylinder portion side cutting portion 21. The frame portion 3 has a C-shape with a cross section orthogonal to the axial direction. Therefore, the internal space of the through-hole filler holder 1 communicates with the external space via the tubular portion-side cutting portion 21 and the frame portion-side cutting portion 31. Therefore, a long body L such as a pipe can be passed through the cut portions 21 and 31. Therefore, since the long body L can be passed through the cut portions 21 and 31 through the through hole H through which the long body L has already penetrated, post-construction is possible. However, the frame portion side cutting portion 31 may not be provided, and the frame portion 3 may have a shape without a break in the circumferential direction.

It is desirable that the outer diameter dimension of the frame portion 3 is set larger than the diameter dimension of the inner peripheral surface of the inner peripheral surface Hs of the through hole H to be mounted. In this case, as shown in FIG. 2, with the diameter of the frame portion 3 reduced so that the C-shape changes, the cylinder portion 2 and the frame portion 3 are moved in the direction of the arrow M to form the through hole H. Insert inside. First, the insertion is performed from the frame portion 3 on the side far from the operator (lower side when installed in the through hole H of the floor slab), and is in the state shown in FIG. As shown in the drawing, the diameter of the frame portion 3 is reduced so that one end in the circumferential direction and the other end in the circumferential direction of the frame portion 3 sandwiching the cut portion 31 on the frame portion side are butted against each other. In this case, since each of the end portions is moved in the circumferential direction as the diameter is reduced, a restoring force that tends to return to the original form is generated in the frame portion 3. As a result, the frame portion 3 can be made to follow the inner surface of the through hole H.

Here, conventionally, a device used by inserting it into this type of through hole corresponds to the frame portion 3 of the present embodiment provided at both ends or one end of the tubular portion corresponding to the tubular portion 2 of the present embodiment. There was a configuration in which the ring-shaped portion was exposed to the outside (wall surface) of the passage. However, in such a configuration, the degree of freedom of arrangement is limited. Therefore, the ring-shaped portion and the tube-shaped portion exposed on the wall surface may spoil the aesthetic appearance. Further, since the tubular portion requires a total length in the penetrating direction of the passage, a deformation dimension due to twisting, and a dimension for attaching to the ring, a large amount of material is required.

On the other hand, in the filler holder 1 for a through hole of the present embodiment, as shown in FIG. 3, the frame portion 3 is finally positioned inside the through hole H, so that the degree of freedom of arrangement is increased. high. Further, since the cylinder portion 2 and the frame portion 3 can be prevented from being exposed to the outside (wall surface) of the through hole H, it is less likely to cause a problem in terms of aesthetics. Further, it is not necessary to set the axial length of the tubular portion 2 to be larger than the axial dimension of the through hole H after construction, and it can be set to the minimum length required to close the internal space of the through hole H. .. Therefore, the material used for the tubular portion 2 can be saved.

Here, the filler 1 for a through hole of the present embodiment is inserted into a through hole H having an inner peripheral surface Hs provided inside a floor slab (see FIG. 3) or a wall in a building or the like. Used. The term "having an inner peripheral surface" means a space in which the wall is composed of two opposing wall plates, each of which has an opening, and there is nothing between the two openings, such as a hollow wall. For example, the inner peripheral surface exists continuously so as to connect two openings. However, it is also possible to apply the filler holder 1 for through holes of the present embodiment to the above-mentioned configuration in which the wall plates are each open and there is no space between the two openings. is there. In this case, a cylindrical sleeve made of, for example, a steel plate or a void tube made of paper is provided so as to connect the two openings in the through hole H. Then, since the through hole H having the inner peripheral surface Hs can be formed with the sleeve provided, the through hole filler holder 1 of the present embodiment can be inserted. The form of the sleeve is not particularly limited, but like the frame portion 3, it is preferable to have a form in which the diameter can be reduced by having a cut portion cut in the circumferential direction because it is easy to insert into the through hole H. ..

After being inserted into the through hole H, the frame portion 3 whose diameter has been reduced upon insertion tends to return to the diameter before the diameter reduction due to the restoring force of the frame portion 3 itself. Therefore, due to the restoring force, the frame portion 3 comes into contact with the inner peripheral surface Hs with a pressing force. When the frame portion 3 pushes the inner peripheral surface Hs, the frame portion 3 is held in position with respect to the through hole H. It is not essential that the inner peripheral surface Hs is a single unified surface, and it is sufficient that the frame portion 3 of the through-hole filler 1 has the contact surface. Therefore, the inner peripheral surface Hs may be divided or have a hole. Further, when the sleeve or the like is provided as described above, the inner peripheral surface is formed on the sleeve or the like.

The frame portion 3 on the side far from the worker is installed in the through hole H of the floor slab on the side closer to the worker (see FIG. 2) with respect to the through hole filler holder 1 (see FIG. 2) in which the frame portion 3 is inserted inside the through hole H. By turning the frame portion 3 (on the upper side in the case) in the circumferential direction, the tubular portion 2 is twisted. The rotation for twisting the tubular portion 2 can also be performed on the through-hole filler holder 1 that is being inserted into the through-hole H. Since the tubular portion 2 is made of a flexible material, the operator can easily twist the tubular portion 2. The twisted portion (twisted portion 22) of the tubular portion 2 moves so as to approach the center in the radial direction. Since the frame portion 3 on the side far from the operator is already in contact with the inner peripheral surface Hs with pressing pressure inside the through hole H, as the cylinder portion 2 is twisted, the side closer to the operator The frame portion 3 approaches the through hole H (moves downward in the state shown in FIG. 2). Then, when the worker pushes the frame portion 3 on the side far from the worker with his / her hand, the frame portion 3 is inserted into the through hole H, and the filler holder 1 for the through hole is shown in FIG. 3, for example. It is provided at the indicated position. It is also possible to rotate the frame portion 3 and insert it into the through hole H at the same time (insert while rotating). As shown in FIG. 3, when the elongated body L penetrates the through hole H, the twisted portion 22 of the tubular portion 2 comes into contact with the outer peripheral portion of the elongated body L. Further, when the degree of twisting is large, the twisted portion 22 can be entwined with the outer peripheral portion of the elongated body L. In this way, the space of the through hole H can be closed by the twisted portion 22 in the deformed tubular portion 2.

Then, in this way, the filler F (for example, mortar) is put into the through hole H so that the frame portion 3 is in contact with the inner peripheral surface Hs of the through hole H and is in contact with the inner surface of the twisted tubular portion 2. Then, the tubular portion 2 holds the filler F arranged in the through hole H. In the arrangement of the filler holder 1 for through holes shown in FIG. 3, what is filled with the filler F in the through hole H is the space surrounding the elongated body L in the through hole H, and the twisted portion 22 (more specifically). Is a space above (the portion where the elongated body L and the twisted portion 22 are in contact with each other). That is, this space becomes a filler accommodating space. Further, the surface of the tubular portion 2 in contact with the filler F is the filler holding surface. When the filler F is, for example, mortar, it has fluidity when it is put into the through hole H, but it is held by the tubular portion 2 and hardens after a certain period of time. The space below the twisted portion 22 in the through hole H can also be filled with the filler F by attaching a backing plate to the through hole H or the like.

The frame portion 3 may be arranged in the through hole H near the end of the through hole H or in the central portion in the axial direction. The frame portions 3 provided at both ends of the through-hole filler 1 are brought closer in the axial direction as the tubular portion 2 is twisted, as compared with the state before the twisting. The frame portion 3 on the side far from the operator pushes the inner peripheral surface Hs by the restoring force. Therefore, it is not particularly necessary for the operator to hold the frame portion 3 on the far side so as not to rotate in the circumferential direction. Therefore, it is possible to work by one worker. In this way, the space of the through hole H can be easily closed by inserting the frame portion 3 into the through hole H in a reduced diameter state and then twisting the tubular portion 2 in the circumferential direction.

In the filler holder 1 for through holes of the present embodiment, it is only necessary to twist the tubular portion 2, which is more convenient than the conventional one. Further, since it is not a complicated structure such as a mechanical shutter structure, the manufacturing cost of the filler holder 1 for a through hole can be suppressed. In addition, since it is lighter than a device having a mechanical shutter structure, the physical burden on the operator at the construction site is small. Further, by inserting the filler 1 for the through hole into the through hole H and twisting the cylinder portion 2, the cylinder portion 2 whose position is held by the frame portion 3 can hold the filler F. Therefore, the through-hole filler 1 can be inserted from either one side or the other side of the through-hole H. Therefore, when constructing the through hole H that penetrates the floor slab in the vertical direction, the operator can insert the through hole filler holder 1 from the upper floor side of the floor slab, so that work at a high place is unnecessary. Therefore, the safety of work can be improved.

The tubular portion 2 may have an expanding material that expands by receiving heat for fire prevention. Although not shown, the expansion material is arranged by, for example, being attached to the cylinder portion 2. As the expansion material, those having various configurations can be used. In the event of a fire, the expansion material expands due to heat and closes the internal space of the through hole H (the part where the filler F does not exist). Therefore, even if the elongated body L and the tubular portion 2 disappear due to heat, they expand. The expanding material can prevent the spread of fire to the adjacent section through the through hole H.

The expansion material may be provided on the entire cylinder portion 2, or may be provided in a dispersed manner. When they are distributed and provided, the expanding material can be positioned separately on one side and the other side in the axial direction of the tubular portion 2. For example, it may be provided so as to match the frame portion 3, or may be provided at a position close to the inside of the frame portion 3 in the axial direction. As described above, as the tubular portion 2 is twisted, the frame portions 3 provided at both ends of the through-hole filler holder 1 approach each other in the axial direction, so that the expansion is also located on one side in the axial direction. The material and the expansion material located on the other side are brought close to each other in the axial direction (penetration direction of the through hole H). Therefore, the expansion material can be arranged at a position where fire protection should be applied in the through hole H.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the through-hole filler holder 1 is used for the through-hole H of the floor slab that penetrates in the vertical direction, as shown in FIG. However, the present invention is not limited to this, and it can also be used for a through hole H in a wall penetrating in the horizontal direction or the like. However, in this case, it is necessary to arrange the backing plate along the outer surface of the through hole H, for example, until the filler F is cured so that the uncured filler F does not come out from the through hole H. is there. When a filler having low fluidity is used, such a backing plate is unnecessary.

Further, the frame portion 3 is not limited to the one provided at the end portion of the tubular portion 2 as in the above embodiment. It can also be provided at a position separated inward in the axial direction from the end of the tubular portion 2.

Further, the frame portion 3 has an annular shape in the above embodiment. However, the present invention is not limited to this, and it may be in the shape of a polygonal frame. However, it is easier to move (rotate) the frame portion 3 in the circumferential direction along the inner peripheral surface Hs of the through hole H when the ring shape is formed.

Further, in the above-described embodiment, the frame portion 3 is provided outside the diameter of the tubular portion 2. However, the present invention is not limited to this, and it may be provided inside the diameter of the tubular portion 2 or may be provided laterally (in the axial direction) of the tubular portion 2 in the axial direction.

Further, the frame portion 3 may be immovable in the axial direction by providing the frame portion 3 with a stopper 4 that can be fixed to the inner peripheral surface Hs of the through hole H. It suffices to immobilize until the curing of the filler F is completed. The frame portions 3 in this case are provided on one side and the other side (upper and lower in the above embodiment) in the axial direction. The stopper 4 is connected to any one of the frame portions 3 (specifically, the frame portion 3 on the side closer to the operator), and is an outer surface around the through hole H (an outer surface such as a floor slab surrounding the through hole H). That is, in the case of the arrangement shown in FIG. 3, the distance between the outer surface and the frame portion 3 is kept constant in a state of being in contact with the upper surface).

An example of the form of the stopper 4 is shown in FIGS. 4 (a) and 4 (b). The stopper 4 shown in FIG. 4A is an L-shaped member in a vertical cross-sectional view connected to the inner peripheral surface of the frame portion 3. In the stopper 4, the bent portion at the upper end comes into contact with the outer surface around the through hole H when the frame portion 3 is positioned inside the through hole H. The stopper 4 may be connected to the frame portion 3 and may have a shape in which a part of the stopper 4 is in contact with the outer surface around the through hole H, and may have a J-shape in addition to the L-shape. The stopper 4 shown in FIG. 4B is, for example, an annular body extending in the horizontal direction connected to the frame portion 3 via a member extending in the vertical direction.

With such a stopper 4, the position where the tubular portion 2 holds the filler F can be fixed inside the through hole H. The stopper 4 can be removed from the frame portion 3 after the filler F has hardened. Therefore, for example, a separating means 41 such as a cutting line or a fragile portion can be provided between the frame portion 3 and the stopper 4 (see FIG. 4B). Further, in the example shown in FIGS. 4A and 4B, the stopper 4 is formed separately from the frame portion 3, and both are connected and integrated, but the stopper 4 is attached to the frame portion 3. It may be inseparably integrally formed as a part.

Further, the frame portion 3 can have a friction portion 32 on the outer periphery which makes it difficult to slip with respect to the inner peripheral surface of the through hole H when the cylinder portion 2 is twisted. An example of the form of the friction portion 32 is shown in FIGS. 5 (a) and 5 (b). The friction portion 32 shown in FIG. 5A has a plurality of single-tooth-shaped protrusions 321 inclined to one side in the circumferential direction. When the protrusion 321 has a single-tooth shape, the inclination of the protrusion 321 of the frame portion 3 on one side in the axial direction and the protrusion 321 of the frame portion 3 on the other side in the circumferential direction is when the tubular portion 2 is twisted. Since each frame portion 3 rotates in the opposite direction, it is preferable to set them in the opposite direction. Further, the friction portion 32 shown in FIG. 5B has a soft portion 322 such as a sponge-like or soft rubber at an extra-diameter position in the frame portion 3. As described above, since the frame portion 3 has the friction portion 32, the tubular portion 2 can be reliably twisted. It is assumed that only the frame portion 3 arranged on the back side of the through hole H (the side far from the operator, the lower side when the floor slab is installed in the through hole H) has the friction portion 32, and the front side of the through hole H. The frame portion 3 arranged (on the side close to the operator, on the upper side when the work is performed in the through hole H of the floor slab) may be fixed so as not to rotate by, for example, screwing to the floor slab.

Further, as shown in FIG. 6, one of the circumferential end portions of the tubular portion 2 may be extended in the circumferential direction. By doing so, since the tubular portion 2 is twisted with the circumferential end portions of the tubular portion 2 overlapping, the tubular portion side cutting portion 21 expands, a gap is generated in the tubular portion 2, and the gap is used before curing. It is possible to prevent the filler F of the above from leaking out.

Further, by changing the axial dimension (width dimension) of the frame portion 3, the position of the twisted portion (twisted portion 22) of the tubular portion 2 can be set. For example, when one frame portion 3 is arranged so as to coincide with the outer surface of the through hole H, and the axial dimension of the frame portion 3 is large, the position of the twisted portion 22 is located far from the outer surface of the through hole H. Can be set to. On the other hand, when the axial dimension of the frame portion 3 is small, the position of the twisted portion 22 can be set to a position close to the outer surface of the through hole H.

1 Filler holder for through hole 2 Cylinder part 21 Cylinder side cutting part 22 Twisted part 3 Frame part 31 Dividing part, frame part side cutting part 32 Friction part 4 Stopper H Through hole Hs Inner peripheral surface of through hole L Long State F Filler

Claims (4)

Used by inserting it into a through hole
A tubular part in which a sheet that is flexible enough to be twisted and deformed is formed into a tubular shape,
A frame provided along the circumferential direction on at least one of the tubular portions in the axial direction, capable of reducing the diameter according to the inner peripheral surface of the through hole, and having a restoring force to the original state in the reduced diameter state. With a department,
A filler holder for a through hole in which the twisted tubular portion is in contact with a fluid filler arranged in the through hole while the frame portion is in contact with the inner peripheral surface of the through hole. The filler holder for a through hole according to claim 1, wherein the frame portion has a divided portion divided in the circumferential direction and has a C-shape in a radial cross section. The filler holder for a through hole according to claim 1 or 2, wherein the frame portion has a friction portion on the outer periphery that makes it difficult to slip with respect to the inner peripheral surface of the through hole when the tubular portion is twisted. The frame portion is provided on one side and the other side in the axial direction.
One of claims 1 to 3, which has a stopper that is connected to any of the frame portions and has a stopper that keeps the distance between the outer surface and the frame portion constant in a state of being in contact with the outer surface around the through hole. The described filler holder for through holes.

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