JP7580247B2 - Filler holder for through holes - Google Patents

Description

The present invention relates to a through-hole filler holder that is inserted into a through-hole.

A through hole that penetrates a floor or wall of a building or the like is filled with a filler (e.g., mortar) to fill the space in the through hole. The filler is often fluid when placed in the through hole. For this reason, a sheet-like gap blocker, for example as described in Patent Document 1, is used during construction. This gap blocker is attached to the lower outer surface of a floor slab having a through hole, and the lower end of the through hole is blocked except for the part through which a long object such as a pipe passes, and in this state the filler is placed in the space of the through hole. As a result, the gap blocker holds the filler, and the space in the through hole where no long object is present is filled with the filler.

JP 2018-44660 A

However, when using such sheet-like gap blocking materials, the lower outer surface of the floor slab becomes the ceiling side of the work space and is at a high altitude when work is carried out from below, which makes it difficult to work on site.

Therefore, the objective of the present invention is to provide a filler holder for through holes that improves workability on-site.

The present invention is a through-hole filler holder that is used by being inserted into a through-hole and includes a tubular portion formed from a sheet that is flexible enough to be twisted and deformed, and a frame portion that is provided circumferentially on at least one side of the axial direction of the tubular portion, can be contracted to fit the inner peripheral surface of the through-hole, and has a restoring force to its original state when contracted, and when the frame portion is in contact with the inner peripheral surface of the through-hole, the twisted tubular portion comes into contact with a fluid filler material placed in the through-hole.

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

The frame may also have a divided portion that is divided in the circumferential direction and has a C-shape in radial cross section.

With this configuration, the frame deforms so that its C-shape changes, allowing the frame to conform to the inner surface of the through hole.

The frame portion may also have a friction portion on its outer periphery that prevents the tube portion from slipping against the inner periphery of the through hole when the tube portion is twisted.

With this configuration, the frame has a friction portion, so the tube can be twisted reliably.

The frame portion may also be provided on one side and the other side in the axial direction, and may have a stopper that is connected to one of the frame portions and that maintains a constant distance between the outer surface and the frame portion when in contact with the outer surface around the through hole.

With this configuration, the stopper allows the tube portion to hold the filler in a constant position inside the through hole.

The present invention allows the through-hole filler holder to be inserted from either side of the through-hole. This improves workability on-site and is adaptable to through-holes of various sizes.

1 is a perspective view showing a through-hole filler holder according to an embodiment of the present invention; 11 is a perspective view showing a state in which the through-hole filler holder is being inserted into the through-hole and before the tubular portion is twisted. FIG. 13 is a perspective view showing the state in which the filler holder for a through hole is inserted into a through hole in which a long strip is placed, the tubular portion is twisted, and mortar is poured in. FIG. 13A and 13B are side views (without illustrating the cylindrical portion) showing an example of a frame portion provided with a stopper. 10A and 10B are plan views (without illustrating the cylindrical portion) showing an example of a frame portion provided with a friction portion. FIG. 11 is a perspective view showing a through-hole filler holder according to another embodiment of the present invention, in which a cylindrical portion is extended in the circumferential direction.

Next, we will explain one embodiment of the through-hole filler holder of the present invention.

The through-hole filler holder 1 of this embodiment is cylindrical as shown in Figure 1. The through-hole filler holder 1 mainly comprises a cylindrical portion 2 and a frame portion 3.

The cylindrical portion 2 is formed by molding a flat sheet into a cylindrical shape. The cylindrical portion 2 in this embodiment has a cylindrical cut portion 21 that is cut (divided) in the circumferential direction and has a slit shape. The cylindrical cut portion 21 extends in the axial direction. Therefore, the cylindrical portion 2 has a C-shape in a cross section perpendicular to the axial direction (radial cross section). However, the cylindrical portion 21 may not be provided and the cross section may be O-shaped. In addition, the cylindrical portion 2 may have one side portion and the other side portion in the circumferential direction facing the cylindrical cut portion 21 overlap in the radial direction so that the slit is not exposed (see, for example, FIG. 6). In this embodiment, the cylindrical portion 21 is provided in one place, but may be provided in two or more places.

The sheet used for the tube portion 2 is made of a flexible material. This sheet is made of a material that is fire-resistant, heat-resistant, and flame-resistant. In addition to these, the sheet must be made of a material that the filler F (e.g., mortar) used cannot pass through in the thickness direction. Specific examples of materials include ceramic wool sheets, fire-resistant foam (expanded foam), thermally expandable butyl tape, aluminum glass film, and aluminum glass cloth. The sheet may also be a composite material of a reinforcing material made of a linear or mesh body and a sheet material. In particular, materials with reinforcing materials can improve the bending strength, so that the bending of the twisted tube portion 2 in contact with the filler F under the weight of the filler F can be reduced.

The tube 2 must be flexible enough to be deformed in a circumferential direction. In terms of flexibility, it is desirable that the sheet has flexibility to be able to twist the surfaces (front and back) of the sheet when it is flat, and in particular, when it is molded into the tube 2, it has flexibility to be able to twist 360 degrees or more in the circumferential direction. In addition, it is desirable that the inner surface of the tube 2 is smooth enough to slide at least in the axial direction when it comes into contact with a long object L (piping, cable, etc.) passing through the through hole H, as shown in FIG. 3. In addition, when the through hole filler holder 1 is attached to the through hole H provided in the fire compartment, the sheet used for the tube 2 is desirably made of a non-combustible material. In addition, when an expanding material is used, which will be described later, a non-combustible material such as paper can also be used.

The frame 3 is provided along the circumferential direction on at least one side of the axial direction of the tubular portion 2. In this embodiment, the frame 3 is provided integrally with the tubular portion 2 on both ends of the axial direction of the tubular portion 2. The frame 3 is provided on the radially outer side of the tubular portion 2. The frame 3 is annular when viewed in the axial direction, and is, for example, a hard resin ring or a metal ring. The frame 3 may be bonded to the tubular portion 2, or may be attached to the tubular portion 2 by a fastener such as a pin. The frame 3 can be contracted to fit the inner circumferential surface of the inner circumferential surface Hs (see FIG. 3) of the through hole H, and has a restoring force to its original state when contracted.

The frame 3 of this embodiment has a frame-side cut portion 31 as a divided portion cut (divided) in the circumferential direction. The frame-side cut portion 31 extends in the axial direction. The frame-side cut portion 31 is formed at one location continuous with the tube-side cut portion 21. The frame 3 has a C-shaped cross section perpendicular to the axial direction. Therefore, the internal space of the through-hole filler holder 1 communicates with the external space through the tube-side cut portion 21 and the frame-side cut portion 31. Therefore, a long-shaped body L such as a pipe can be passed through each cut portion 21, 31. Therefore, the long-shaped body L can be passed through each cut portion 21, 31 for the through hole H through which the long-shaped body L has already passed, so that post-construction is possible. However, the frame 3 may have a shape without a break in the circumferential direction without providing the frame-side cut portion 31.

It is desirable to set the outer diameter of the frame 3 larger than the diameter of the inner peripheral surface Hs of the through hole H to be attached. In this case, as shown in FIG. 2, the frame 3 is reduced in diameter so that the C-shape changes, and the tube 2 and frame 3 are moved in the direction of the arrow M and inserted into the through hole H. The frame 3 is inserted first from the side farthest from the worker (the lower side when constructing the through hole H of a floor slab), and is in the state shown in FIG. 2. The frame 3 is reduced in diameter, for example, as shown in the figure, so that one circumferential end and the other circumferential end of the frame 3 sandwiching the frame side cut portion 31 are butted against each other. In this case, since the ends are moved in the circumferential direction as the diameter is reduced, a restoring force that tries to return to the original shape is generated in the frame 3. This allows the frame 3 to follow the inner surface of the through hole H.

Here, in a conventional device for use by inserting into this type of through hole, there exists a configuration in which a ring-shaped portion corresponding to the frame portion 3 of this embodiment, provided at both ends or one end of a tubular portion corresponding to the cylindrical portion 2 of this embodiment, is exposed to the outside (wall surface) of the passage. However, such a configuration limits the freedom of arrangement. Therefore, the ring-shaped portion and part of the tubular portion exposed to the wall surface may spoil the aesthetic appearance. Also, a large amount of material is required for the tubular portion, since in addition to the overall length in the direction of passage penetration, the deformation dimension due to twisting and the dimension for attaching to the ring are required.

In contrast to this, in the through-hole filler holder 1 of this embodiment, as shown in FIG. 3, the frame portion 3 can be ultimately positioned inside the through-hole H, allowing for a high degree of freedom in placement. In addition, the tubular portion 2 and frame portion 3 can be prevented from being exposed to the outside (wall surface) of the through-hole H, so aesthetics are unlikely to be an issue. Furthermore, there is no need 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. This allows for saving on the material used for the tubular portion 2.

Here, the through-hole filler holder 1 of this embodiment is used by inserting it 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. The term "having an inner peripheral surface" does not mean that the wall is made of two opposing wall panels, each of which has an opening, and there is no space between the two openings, as in a hollow wall, but that the inner peripheral surface exists continuously to connect the two openings. However, it is also possible to apply the through-hole filler holder 1 of this embodiment to a configuration in which the wall panels are each open, and there is no space between the two openings. In this case, a cylindrical sleeve made of, for example, a steel plate or a void tube made of paper is provided to connect the two openings in the through-hole H. In this way, the through-hole H having the inner peripheral surface Hs can be formed with the sleeve provided, and the through-hole filler holder 1 of this embodiment can be inserted. The shape of the sleeve is not particularly limited, but it is preferable that it has a shape that can be reduced in diameter by having a cut portion cut in the circumferential direction, similar to the frame portion 3, because this makes it easier to insert it into the through hole H.

After the frame 3, which had been reduced in diameter during insertion, is inserted into the through hole H, it attempts to return to the diameter before it was reduced due to the restoring force of the frame 3 itself. This restoring force causes the frame 3 to come into contact with the inner peripheral surface Hs with a pressing force. The frame 3 presses the inner peripheral surface Hs, thereby holding the frame 3 in position relative to the through hole H. Note that the inner peripheral surface Hs does not necessarily have to be a single, unified surface, and it is sufficient that the frame 3 of the through hole filler holder 1 has the above-mentioned contact surface. Therefore, the inner peripheral surface Hs may be divided or have holes. In addition, when a sleeve or the like is provided as described above, the inner peripheral surface is formed into the sleeve or the like.

The frame part 3 on the side farther from the worker is inserted into the through hole H of the through hole filler holder 1 (see FIG. 2), and the frame part 3 on the side closer to the worker (the upper side when constructing the through hole H of a floor slab) is rotated in the circumferential direction to twist the tubular part 2. Rotation to twist the tubular part 2 can also be performed on the through hole filler holder 1 in the middle of being inserted into the through hole H. Since the tubular part 2 is made of a flexible material, the worker can easily twist the tubular part 2. The twisted part of the tubular part 2 (twisted part 22) moves so as to approach the radial center. Since the frame part 3 on the side farther from the worker is already in contact with the inner circumferential surface Hs inside the through hole H with a pressing force, as the tubular part 2 twists, the frame part 3 on the side closer to the worker approaches the through hole H (moves downward in the state shown in FIG. 2). Then, the worker places his/her hand on the frame 3 farthest from the worker and pushes it in, so that the frame 3 is inserted into the through hole H, and the through hole filler holder 1 is set at the position shown in FIG. 3, for example. The frame 3 can be rotated and inserted into the through hole H at the same time (inserted while rotating). As shown in FIG. 3, when the long body L passes through the through hole H, the twisted portion 22 of the tube 2 comes into contact with the outer periphery of the long body L. Furthermore, when the degree of twisting is large, the twisted portion 22 can be entangled with the outer periphery of the long body L. In this way, the space of the through hole H can be blocked by the twisted portion 22 of the deformed tube 2.

In this way, the filler F (e.g., mortar) is placed in the through hole H so that the frame 3 is in contact with the inner peripheral surface Hs of the through hole H and in contact with the inner surface of the twisted tube 2, and the tube 2 holds the filler F placed in the through hole H. In the arrangement of the through hole filler holder 1 shown in FIG. 3, the space in the through hole H that is filled with the filler F is the space surrounding the elongated body L in the through hole H, and is the space above the twisted portion 22 (more specifically, the portion where the elongated body L and the twisted portion 22 contact). In other words, this space becomes the filler storage space. In addition, the surface of the tube 2 that the filler F contacts becomes the filler holding surface. If the filler F is, for example, mortar, it has fluidity when it is first placed in the through hole H, but hardens after a certain period of time has passed while it is held in the tube 2. The space below the twisted portion 22 in the through hole H can also be filled with the filler F by placing a backing plate on the through hole H, etc.

The frame 3 may be positioned in the through hole H near the end of the through hole H or in the axial center. The frame 3 at both ends of the through hole filler holder 1 is brought closer to the through hole in the axial direction as the tubular portion 2 is twisted. The frame 3 on the side farther from the worker presses the inner peripheral surface Hs by a restoring force. For this reason, it is not necessary for the worker to hold the frame 3 on the far side so that it does not rotate in the circumferential direction. Therefore, the work can be done by a single worker. In this way, the frame 3 is inserted into the through hole H in a reduced diameter state, and then the tubular portion 2 is twisted in the circumferential direction to easily close the space in the through hole H.

In the through-hole filler holder 1 of this embodiment, it is more convenient than the conventional one because it is only necessary to twist the tubular portion 2. In addition, since it is not a complicated structure such as a mechanical shutter structure, the manufacturing cost of the through-hole filler holder 1 can be reduced. In addition, since it is lighter than a device having a mechanical shutter structure, the physical burden on the worker at the construction site is small. In addition, by inserting the through-hole filler holder 1 into the through-hole H and twisting the tubular portion 2, the tubular portion 2 held in position by the frame portion 3 can hold the filler F. Therefore, the through-hole filler holder 1 can be inserted from both one side and the other side of the through-hole H. Therefore, when construction is performed on the through-hole H that penetrates the floor slab in the vertical direction, the worker can insert the through-hole filler holder 1 from the upper floor side of the floor slab, which eliminates the need for working at height and improves work safety.

For fire prevention, the tubular portion 2 may have an expansion material that expands when exposed to heat. The expansion material is not shown, but is arranged, for example, by being attached to the tubular portion 2. Expansion materials of various configurations can be used. In the event of a fire, the expansion material expands due to heat and blocks the internal space of the through hole H (the portion where no filler material F is present). Therefore, even if the elongated body L and the tubular portion 2 are destroyed by heat, the expanded expansion material can prevent the fire from spreading to adjacent sections through the through hole H.

The expansion material may be provided over the entire surface of the tubular portion 2, or may be provided in a dispersed manner. When the expansion material is provided in a dispersed manner, it can be located separately on one side and the other side of the tubular portion 2 in the axial direction. For example, it can be provided so as to coincide with the frame portion 3, or it can be provided in a position close to the inside of the frame portion 3 in the axial direction. As described above, when 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 material located on one side and the expansion material located on the other side are similarly brought closer to each other in the axial direction (the penetrating direction of the through-hole H). Therefore, the expansion material can be placed in the position in the through-hole H where fire protection should be applied.

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 spirit of the present invention.

For example, in the above embodiment, the through-hole filler holder 1 was used for a through-hole H in a floor slab that penetrates in the vertical direction, as shown in FIG. 3. However, this is not limited to this, and it can also be used for a through-hole H in a wall that penetrates in the horizontal direction, etc. In this case, however, it is necessary to place a backing plate, for example, along the outer surface of the through-hole H until the filler F hardens, so that the unhardened filler F does not leak out of the through-hole H. Note that such a backing plate is not necessary when a filler with low fluidity is used.

Furthermore, the frame portion 3 is not limited to being provided at the end of the tubular portion 2 as in the above embodiment. It can also be provided at a position spaced axially inward from the end of the tubular portion 2.

In addition, in the above embodiment, the frame portion 3 is annular. However, this is not limited to this, and the frame portion 3 may be polygonal. However, the annular shape makes it easier to move (rotate) the frame portion 3 in the circumferential direction along the inner peripheral surface Hs of the through hole H.

In addition, in the above embodiment, the frame portion 3 is provided on the radially outer side of the cylindrical portion 2. However, this is not limited to this, and the frame portion 3 may be provided on the radially inner side of the cylindrical portion 2, or may be provided on the side of the cylindrical portion 2 in the axial direction (in line with the cylindrical portion 2).

The frame 3 may be immobilized in the axial direction by providing a stopper 4 that can be fixed to the inner peripheral surface Hs of the through hole H. It is sufficient to keep the frame 3 immobile until the filling material F has completely hardened. In this case, the frame 3 is provided on one side and the other side in the axial direction (upper and lower in the above embodiment). The stopper 4 is connected to one of the frame 3 (specifically, the frame 3 closer to the worker) and keeps the distance between the outer surface and the frame 3 constant while in contact with the outer surface around the through hole H (the outer surface of the floor slab or the like that surrounds the through hole H, i.e. the upper surface in the case of the arrangement shown in FIG. 3).

Examples of the shape of the stopper 4 are shown in Fig. 4(a) and (b). The stopper 4 shown in Fig. 4(a) is an L-shaped member in vertical cross section, connected to the inner peripheral surface of the frame 3. In this stopper 4, the bent portion at the upper end contacts the outer surface around the through hole H when the frame 3 is positioned inside the through hole H. The stopper 4 may be connected to the frame 3 and may have a shape such that a portion of the stopper 4 contacts the outer surface around the through hole H, and may be, for example, a J-shape other than an L-shape. The stopper 4 shown in Fig. 4(b) is, for example, a horizontally extending circular ring connected to the frame 3 via a member extending vertically.

Such a stopper 4 allows the tube portion 2 to hold the filler F at a constant position inside the through hole H. The stopper 4 can be removed from the frame portion 3 after the filler F has hardened. For this reason, for example, a separation means 41 such as a cutting line or a weak portion can be provided between the frame portion 3 and the stopper 4 (see FIG. 4(b)). In the example shown in FIGS. 4(a) and (b), the stopper 4 is formed separately from the frame portion 3, and the two are connected and integrated, but the stopper 4 may be formed as an inseparable integral part of the frame portion 3.

The frame 3 may have a friction portion 32 on its outer periphery that prevents the tube 2 from slipping against the inner periphery of the through hole H when the tube 2 is twisted. Examples of the shape of the friction portion 32 are shown in Figs. 5(a) and 5(b). The friction portion 32 shown in Fig. 5(a) has a plurality of single-tooth-shaped protrusions 321 inclined to one side in the circumferential direction. When the protrusions 321 are single-tooth-shaped, it is preferable to set the inclination in the circumferential direction of the protrusions 321 of the frame 3 on one side in the axial direction and the protrusions 321 of the frame 3 on the other side in the axial direction to be reversed, since the frames 3 rotate in opposite directions when the tube 2 is twisted. The friction portion 32 shown in Fig. 5(b) has a soft portion 322 such as a sponge or soft rubber at the radially outer position of the frame 3. In this way, the frame 3 has the friction portion 32, so that the tube 2 can be twisted reliably. Note that only the frame part 3 placed on the back side of the through hole H (the side farther from the worker, the lower side when installing through hole H in a floor slab) has the friction part 32, and the frame part 3 placed on the front side of the through hole H (the side closer to the worker, the upper side when installing through hole H in a floor slab) may be fixed so as not to rotate, for example, by screwing it to the floor slab.

Also, as shown in FIG. 6, one of the circumferential ends of the tubular portion 2 can be extended in the circumferential direction. In this way, the tubular portion 2 is twisted with the circumferential ends of the tubular portion 2 overlapping each other, widening the tubular portion-side cut portion 21 and creating a gap in the tubular portion 2, which can prevent the filler material F from leaking out before hardening.

The position of the twisted portion of the tube portion 2 (twisted portion 22) can also be set by changing the axial dimension (width dimension) of the frame portion 3. For example, if one frame portion 3 is positioned to coincide with the outer surface of the through hole H, then if the axial dimension of the frame portion 3 is large, the position of the twisted portion 22 can be set farther from the outer surface of the through hole H. On the other hand, if the axial dimension of the frame portion 3 is small, the position of the twisted portion 22 can be set closer to the outer surface of the through hole H.

REFERENCE SIGNS LIST 1 Filler holder for through hole 2 Cylindrical portion 21 Cut portion on cylindrical portion side 22 Twisted portion 3 Frame portion 31 Divided portion, cut portion on frame portion side 32 Friction portion 4 Stopper H Through hole Hs Inner peripheral surface of through hole L Long piece F Filler

Claims (5)

It is used by inserting it into a through hole,
a cylindrical portion formed by shaping a sheet that is flexible enough to be twisted;
A frame portion is provided along a circumferential direction on at least one side of the cylindrical portion in the axial direction, the frame portion being capable of being contracted in diameter to match an inner circumferential surface of the through hole, and having a restoring force to an original state when contracted in diameter,
a portion of the twisted tubular portion closer to the insertion point than the twisted portion is in contact with a flowable filler material that is disposed in the through hole separately from the tubular portion when the frame portion is in contact with an inner circumferential surface of the through hole,
The frame portion has a divided portion that is divided in the circumferential direction and has a C-shape in radial cross section. The through hole filler holder according to claim 1 , wherein the frame portion is provided inside the through hole at a predetermined distance from the end of the through hole on the insertion source side when the frame portion is inserted into the through hole . The frame portion is provided on both one side and the other side in the axial direction,
3. The through hole filler holder according to claim 1 , wherein when the frame portions are inserted into the through hole, the restoring forces of both of the frame portions act on an inner peripheral surface of the through hole . The holder for a filler material for a through hole according to claim 1 , wherein the frame portion has a friction portion on an outer periphery thereof that prevents the frame portion from sliding against an inner periphery of the through hole when the cylindrical portion is twisted. It is used by inserting it into a through hole,
a cylindrical portion formed by shaping a sheet that is flexible enough to be twisted;
A frame portion is provided along a circumferential direction on at least one side of the cylindrical portion in the axial direction, the frame portion being capable of being contracted in diameter to match an inner circumferential surface of the through hole, and having a restoring force to an original state when contracted in diameter,
With the frame portion in contact with an inner circumferential surface of the through hole, the twisted cylindrical portion comes into contact with a flowable filler material disposed in the through hole,
The frame portion has a divided portion that is divided in a circumferential direction and has a C-shape in a radial cross section,
The frame portion is provided on one side and the other side in the axial direction,
A filler holder for a through hole, the filler holder having a stopper connected to one of the frame portions and contacting an outer surface around the through hole to maintain a constant distance between the outer surface and the frame portion.