JP7031834B1 - Backup material and its installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backup material which can be easily installed for a joint having a variation in the joint width, and an installation method thereof. A backup material 10 is a backup material formed of a foam that is long in one direction, and includes an inner side surface 1, an outer side surface 2, a left side surface 3, and a right side surface 4. In a cross-sectional view orthogonal to the direction, the inner surface 1 and the outer surface 2 are curved so as to be convex in the outward direction, and the length of the outer surface 2 is longer than the length of the inner surface 1. When the backup material 10 is placed on the horizontal plane with the inner side surface 1 facing downward, the angle formed by the perpendicular line Y1 orthogonal to the horizontal plane and the left side surface 3 is 40 ° or less and the vertical line Y2 and the vertical line Y2. The angle formed by the right side surface 4 is 40 ° or less. [Selection diagram] Fig. 1

Description

The present invention relates to a backup material and a method for installing the backup material.

Conventionally, for sealing joints of other members such as exterior walls, interiors, indoor equipment, and around glass, a backup made of elastic materials is used to adjust the thickness and joint depth of the sealing material before filling the sealing material. The lumber is installed. Specifically, a backup material having the same width as the joint is selected and pushed into the joint along the longitudinal direction, and the surface of the pushed backup material is filled with the sealing material.

However, since the joints generally have a length of several meters in the longitudinal direction and are manually formed by a craftsman, the joint width may vary. For example, even if the joint width is 10 mm, there are some places where the joint width spreads to 12 to 13 mm. Then, at that location, a backup material with a width of 10 mm will have a gap in the width direction, so it will be necessary to separately prepare a backup material with a different width. As a result, with the conventional backup material, the work of switching the backup material of several widths is often done, which is inconvenient.

Therefore, for example, a groove portion that opens along the longitudinal direction is formed at one location on the outer peripheral surface of the backup body, and the outer peripheral surface of the backup body other than the region where the groove portion is formed is tapered toward the side opposite to the opening side of the groove portion. A fireproof backup material for joints formed in a contour shape has been proposed (see Patent Document 1). The U-shaped backup material described in Patent Document 1 presses the U-shaped opening portion (both receiving surfaces in Patent Document 1) so that the U-shaped closing portion (curved portion) is on the inner side of the joint. , Install in the joint.

Japanese Unexamined Patent Publication No. 2010-59706

However, since the backup material described in Patent Document 1 is a U-shaped heat-expandable rubber, resistance (friction force) with the side surface of the joint hole works strongly, and it is difficult to push it into the joint. Further, if the two receiving surfaces (flat surface at the upper end) of the U-shaped structure of the backup material are not pressed evenly, that is, if the pressure is biased to one receiving surface, the backup material is twisted, which is desired. Backup material cannot be installed in the form. For this reason, there is a problem that the work efficiency is remarkably lowered. In addition, after installation, the U-shaped curved part (curved surface at the lower end) is likely to be loaded, so it concentrates on the part and deteriorates over time, the rubber in the part becomes thin, and the stress in the width direction of the backup material decreases. As a result, there is a problem that the backup material falls off to the bottom of the joint.

The present invention provides a backup material that can be easily installed for joints having a variation in joint width, and an installation method thereof.

The backup material of the present invention [1] is a backup material formed of a foam that is long in one direction, and has a first surface along the one direction and a second surface facing the first surface. A third surface along the one direction and a fourth surface facing the third surface are provided, and in a cross-sectional view orthogonal to the one direction, the first surface and the second surface are from the first surface. The backing material is curved so as to be convex in the direction toward the second surface, and the length of the second surface is longer than the length of the first surface, with the first surface facing downward. Is placed on a horizontal plane, and in the cross-sectional view, the angle formed by the vertical line orthogonal to the horizontal plane and the third surface is 40 ° or less, and the angle formed by the vertical line and the fourth surface is , 40 ° or less.

According to such an invention, the second surface is longer than the first surface, and the third and fourth surfaces are in the pushing direction of the joint (the direction in which the first surface and the second surface face each other). Since it is tilted at a desired angle, the backup material can be installed even for joints having variations in width. Further, since it is made of a foam and can be shrunk in the width direction, it is easy to smoothly push it into the joint while the third surface and the fourth surface are in sliding contact with the side surface of the joint hole. In addition, since the first surface and the second surface are curved so as to be convex in the direction from the first surface to the second surface, the backup material is excessive toward the first surface side when pushing from the second surface. It suppresses bending and is stable and easy to push into the joint. Therefore, the backup material can be easily installed. In addition, after installation, stress is generated toward the outside in the width direction of the backup material, and in addition, the backup material is curved so as to be convex in the direction from the first surface to the second surface. Is unlikely to fall off.

In the backup material of the present invention [2], in addition to the present invention [1], the angle formed by the vertical line and the third surface and the angle formed by the vertical line and the fourth surface are both 25 °. It is as follows.

According to such an invention, it can be smoothly installed inside the joint while sliding in contact with the side surface of the joint hole more reliably.

In addition to the present invention [1] or [2], the backup material of the present invention [3] has a difference of 3 mm or more and 7 mm between the length of the second surface and the length of the first surface in the cross-sectional view. It is as follows.

According to such an invention, the backup material can be installed even in joints having a variation of about 3 to 7 mm in width.

In the backup material of the present invention [4], in addition to any one of the items [1] to [3] of the present invention, the length of the first surface is 10 mm or more and 35 mm or less in the cross-sectional view. The length of the second surface is 15 mm or more and 40 mm or less.

According to such an invention, a backup material can be installed on a joint having a width of 10 to 40 mm.

In the backup material of the present invention [5], in addition to any one of the items [1] to [4] of the present invention, the density of the foam on the second surface is smaller than the density of the foam on the first surface. ..

According to such an invention, since the second surface side is more easily contracted, the backup material can be installed more smoothly.

The method of installing the backup material of the present invention [6] is a step of preparing the backup material according to any one of the present inventions [1] to [5], and the first surface thereof faces the joint. A step of arranging the backup material and pressing the second surface is provided.

According to such a method of installing the backup material, the backup material can be easily installed even at joints having variations in width. In addition, after installation, the backup material is unlikely to fall off due to deterioration over time.

The method of installing the backup material of the present invention [7] is a step of preparing a cylindrical foam extending in one direction, cutting the cylindrical foam along the one direction to obtain a plurality of backup materials. A step of arranging the backup material so that the surface corresponding to the inner peripheral surface of the cylindrical foam faces the joint, and pressing the surface corresponding to the outer peripheral surface of the cylindrical foam. The plurality of backup materials include the backup material according to any one of the present inventions [1] to [5].

According to such a method of installing the backup material, the backup material can be easily installed even at joints having variations in width. In addition, after installation, the backup material is unlikely to fall off due to deterioration over time. Furthermore, in the cutting process, by adjusting the circumferential width of the backup material to be cut, the backup material can be installed corresponding to a wide range of joints, and several types of backup materials with different widths are prepared in advance. It is very convenient because you don't have to bring it to the site. In addition, it is possible to reduce the inventory of backup materials having different widths.

The backup material of the present invention and its installation method can be easily installed on joints having variations in joint width.

FIG. 1 shows a perspective view of an embodiment of the backup material of the present invention. 2A shows a cross-sectional view of the backup material shown in FIG. 1, and FIG. 2B shows a cross-sectional view of the backup material shown in FIG. 1 when placed on a horizontal plane. 3A is a plan view of the backup material shown in FIG. 1, FIG. 3B is a side view thereof, and FIG. 3C is a bottom view thereof. 4A and 4B show a backup installation method shown in FIG. 1, FIG. 4A is a step of arranging the backup material facing the joint, FIG. 4B is a step immediately before pressing the outer surface of the backup material, and FIG. 4C is a backup. The process of pushing the material into the joint, FIG. 4D shows the process of installing the backup material in the joint. FIG. 5 shows a cross-sectional view of a modified example of the backup material of the present invention. 6A and 6B show another embodiment of the method of installing the backup material of the present invention, FIG. 6A is a step of preparing a cylindrical foam, FIG. 6B is a step of cutting the cylindrical shape in one direction, and FIG. 6C. Indicates the process of obtaining a plurality of backup materials.

<One Embodiment>
1. 1. Backup Material As an embodiment of the backup material of the present invention, the backup material 10 shown in FIGS. 1 to 4 will be described. In FIG. 1, the direction orthogonal to the first direction is defined as the second direction, and the directions orthogonal to the first direction and the second direction are defined as the third direction. The first direction is one direction in which the backup material extends, and is a long direction. The second direction is the inside / outside direction, one side of the second direction is the outside, and the other side of the second direction is the inside. The third direction is the left-right direction, one side of the third direction is the left side, and the other side of the third direction is the right side.

The backup material 10 shown in FIG. 1 extends in a long direction (an example in one direction), and has an inner side surface (an example of a first surface) 1 on an inner end surface and an outer end surface along the long direction. 2 is provided with an outer surface (an example of a second surface) 2, a left side surface (an example of a third surface) 3 is provided on a left end surface, and a right side surface (an example of a fourth surface) 4 is provided on a right end surface. The backup material 10 is substantially symmetrical. Further, the cross-sectional view orthogonal to the long direction (hereinafter, simply abbreviated as "cross-sectional view") has a shape that is substantially the same in the long direction.

The inner side surface 1 and the outer side surface 2 are long curved surfaces in the long direction arranged so as to face each other in the inner and outer directions. The inner side surface 1 is a surface installed on the inner side of the joint. The outer side surface 2 is a surface that is directly pressed by a hand, a jig, or the like when the backup material 10 is installed in the joint, and is a surface that is filled with and contacts the sealing material after installation. The inner side surface 1 and the outer side surface 2 are curved so as to be convex toward the outside (direction from the inner side surface 1 to the outer side surface 2) in a cross-sectional view (or when viewed so as to face a long direction). is doing. That is, the backup material 10 has an arc shape (arch shape) having a predetermined width in the inner / outer direction and having the inner / outer direction as the radial direction. In cross-sectional view, the arc of the inner surface 1 and the arc of the outer surface 2 are concentric circles with each other.

The left side surface 3 and the right side surface 4 are long planes that are arranged so as to face each other in the left-right direction. The left side surface 3 and the right side surface 4 are sliding contact surfaces that come into contact with the side surface of the joint hole when the backup material 10 is installed in the joint. The cross-sectional view length of the left side surface 3 and the cross-sectional view length of the right side surface 4 are substantially the same.

When the backup material 10 is placed on the horizontal plane X so that the inner side surface 1 faces downward, the left side surface 3 and the right side surface 4 are 40 ° or less with the vertical line Y orthogonal to the horizontal plane X in cross-sectional view, respectively. Makes an acute angle (see FIG. 2B). In other words, the left side surface 3 and the right side surface 4 are vertical lines Y orthogonal to the virtual line connecting the intersection M between the left side surface 3 and the inner side surface 1 and the intersection N between the right side surface 4 and the inner side surface 1. And make an acute angle of 40 ° or less.

Specifically, the left side surface 3 forms an acute angle of 40 ° or less with the first vertical line Y ₁ (a virtual line passing through the point M and orthogonal to the horizontal plane X). The left side surface 3 is located on the left _side with respect to the vertical line Y1. The angle θ ₁ formed by the left side surface 3 and the first vertical line Y ₁ is 40 ° or less, preferably 30 ° or less, and more preferably 25 ° or less. The lower limit is, for example, 5 ° or more, preferably 10 ° or more, and more preferably 15 ° or more.

The right side surface 4 forms an acute angle of 40 ° or less with the second vertical line Y ₂ (a virtual line passing through the point N and orthogonal to the horizontal plane X). The right side surface 4 is located on the right side with respect to the second vertical line Y ₂ . The angle θ ₂ formed by the right side surface 4 and the second vertical line Y ₂ is 40 ° or less, preferably 30 ° or less, and more preferably 25 ° or less. The lower limit is, for example, 5 ° or more, preferably 10 ° or more, and more preferably 15 ° or more.

The cross-sectional view length (arc length) L ₂ of the outer side surface 2 is longer than the cross-sectional view length L ₁ of the inner side surface 1, and the difference is, for example, 2 mm or more, preferably 3 mm or more, and also. For example, it is 10 mm or less, preferably 7 mm or less. The cross-sectional visual length L ₁ of the inner side surface 1 is, for example, 10 mm or more and 35 mm or less. The cross-sectional visual length L ₂ of the outer side surface 2 is, for example, 15 mm or more and 40 mm or less. The thickness (inward / outward length) L ₃ of the backup material 10 is, for example, 5 mm or more and 20 mm or less. The length of the backup material 10 in the long direction is, for example, 50 cm or more and 500 cm or less. The backup material 10 is cut so as to be shorter in the elongated direction and installed at a desired joint.

The backup material 10 is formed of a single foam. Examples of the type of foamed resin constituting the foam include polyethylene, polypropylene, polyurethane, polystyrene and the like, and polyethylene is preferable. The density of the foam is, for example, 10 kg / m ³ or more and 100 kg / m ³ or less from the viewpoint of elasticity.

The backup material 10 is formed, for example, by extrusion formation to form a long cylindrical foam, and then the foam is passed through a cutting die having a cross-sectional view to be continuous in the long direction. Then, the foam may be cut. Further, it may be manufactured by forming a foam having a rectangular shape in a cross-sectional view and heating and pressing the inner side surface 1.

The backup material 10 is suitably used as a member to be installed inside the joint joint of other members. The types of joints are not limited, for example, exterior gaps made of stone, brick, concrete, exterior wall tiles, etc .; for example, interior gaps made of inner walls, interior wall tiles, etc .; water supply / drainage facilities, elevators. Gap in indoor equipment made up of equipment, etc .; Gap around glass made up of window glass, sashes, etc. can be mentioned.

2. 2. Installation method of backup material The installation method of backup material 10 includes a preparation step and a pressing step in order.

In the preparation process, the backup material 10 is prepared. Specifically, the joint width of the joint 5 where the backup material 10 is installed is measured, and the backup material 10 having a width corresponding to the joint width is prepared. At this time, a backup material 10 whose joint width is located between the length L1 of the inner side surface ₁ and the length L2 of the outer side surface ₂ is prepared. Preferably, a backup material 10 is prepared in which the average of the length L ₁ of the inner side surface 1 and the length L ₂ of the outer surface 2 substantially matches the joint width.

In the pressing step, the backup material 10 is arranged so that the inner side surface 1 faces the joint 5 (see FIG. 4A). Specifically, the inner side surface 1 is arranged so as to be the inside (back side) of the joint 5, and the outer surface 2 is arranged so as to be the exposed side of the joint 5.

Subsequently, the outer surface 2 of the backup material 10 is pressed to push the backup material 10 into the joint 5. The backup material 10 may be pressed by directly touching the outer surface 2 by hand, or may be pressed via a jig 6 for pushing the backup material 10 into the joint (see FIG. 4B). ). Then, when the desired joint depth is reached, the pressing is released.

As a result, the backup material 10 is installed in the joint 5. In this installation method, the left side surface 3 and the right side surface 4, which are the sliding contact surfaces, are tilted at an angle of 40 degrees or less with respect to the pushing direction of the joint (inward / outward direction in FIG. 4), so that the width varies. The backup material 10 can also be installed on the joints. Specifically, it can be installed on a joint 5 in which the length of the inner side surface 1 in the left-right direction varies from the length of the outer surface 2 in the left-right direction.

Further, in the pressing step, the left side surface 3 and the right side surface 4 of the backup material 10 move toward the inside of the joint 5 while sliding in contact with the side surface of the side surface of the joint hole. At this time, since the backup material 10 is made of a foam and shrinks in the width direction (left-right direction) of the joint 5, the left side surface 3 and the right side surface 4 are easily pushed into the joint while sliding with the side surface of the joint hole. In addition, since it is made of foam and has an arch shape that is convex outward, the backup material 10 is not excessively bent toward the inner side surface 1 side when the outer surface 2 is pushed in (for example, it becomes convex inward). It does not easily form an arch) and can be pressed stably, so it is easy to push it into the joint 5. Further, by pressing the outer surface 2, the outer surface portion of the foam is compressed and its length in the width direction is slightly shortened, so that the frictional force with the side surface of the joint hole can be reduced. Therefore, the backup material can be easily installed. Further, since the backup material 10 has the above-mentioned cross-sectional view shape, twisting during the pressing process is unlikely to occur.

In addition, after installation (after the pressing is released), stress toward the outside in the width direction (restoring force returning from the compressed state of the foam: see the virtual line in FIG. 4D) is generated in the portion on the outer surface 2 side of the foam. Since the backing material 10 is continuously pressed on the inner side surface of the joint, the backup material 10 is securely fixed in the joint 5. In addition, since it has an arch shape that is convex outward, when the inner side surface 1 is installed vertically downward, it is strong against its own weight and the weight of the sealing material filled on it. Therefore, the backup material is unlikely to fall off due to deterioration over time.

Further, since the backup material 1 can be installed at the joint 5 without the need for an adhesive or an adhesive seal, waste products such as release paper are not generated.

<Modification example of backup material>
A modified example of the backup material 10 shown in FIG. 1 will be described with reference to FIG. The description of the same configuration as that of the backup material 10 shown in FIG. 1 will be omitted.

In the backup material 10 shown in FIG. 5, the density of the foam on the outer surface 2 is smaller than the density of the foam on the inner surface 1. Specifically, as shown in FIG. 5, the backup material 10 has a multi-layer (two-layer) structure including an inner foam layer 11 and an outer foam layer 12 arranged outside the inner foam layer 11, and the outer foam layer 12 has a multi-layer structure. The density is configured to be smaller than the density of the inner foam layer 11. Further, although not shown, it may be a gradation structure in which the foaming density gradually decreases from the inner side surface 1 to the outer side surface 2 instead of the layer structure.

According to this modification, in addition to the action and effect of the backup material 10 shown in FIG. 1, the outer surface 2 is more likely to shrink in the left-right direction, so that the backup material 10 can be installed more smoothly.

<Other embodiments of the installation method>
With reference to FIG. 6, another embodiment of the method of installing the backup material 10 of the present invention will be described. The description of the same configuration as that of the above embodiment will be omitted.

The installation method shown in FIG. 6 includes a preparation step, a cutting step, and a pressing step.

In the preparation step, as shown in FIG. 6A, a cylindrical foam 9 extending in the long direction is prepared. The prepared cylindrical foam 9 is a precursor of the backup material 10 of the above embodiment, and can be produced by known extrusion formation or the like.

In the cutting step, as shown in FIG. 6B, a plurality of circumferential directions (broken line shown in FIG. 6B) of the foam 9 are formed along the long direction of the foam 9 by a general cutting means such as a cutter or scissors. Disconnect. As a result, as shown in FIG. 6C, a plurality of backup materials 10 are obtained. At this time, the length L 1 of the inner side surface ₁ or the length L ₂ of the outer side surface 2 of the plurality of backup materials 10 may be the same or different. It may be appropriately determined according to the type of width of the joint to be installed.

The pressing step is the same as the installation method shown in FIGS. 4A to 4D. Specifically, a plurality of backup materials 10 are arranged so that the inner side surface 1 corresponding to the inner peripheral surface of the cylindrical foam 9 faces the joint 5, and subsequently, the outer peripheral surface of the cylindrical foam 9 is arranged. Press the outer surface 2 corresponding to.

According to such an installation method, in addition to the operation and effect of the above-described embodiment, the backup material 10 is provided to a wide range of joints by adjusting the circumferential width of the backup material 10 to be cut in the cutting step. Can be installed. As a result, it is not necessary to prepare several types of backup materials with different widths in advance and bring them to the site, which is very convenient. In addition, it is possible to reduce the inventory of backup materials having different widths.

Further, in this installation method, in the preparation step, the cylindrical foam 9 may have a cut portion (slit) 13 (dotted chain line shown in FIG. 6A) formed in advance along the elongated direction. As a result, when the first backup material 10 is produced, the cutting work can be reduced by one step, and the work can be made more efficient. Further, since the cylinder can be expanded and the cylindrical foam 9 can be stacked, it is convenient for storage and transportation.

1 Inner side surface 2 Outer side surface 3 Left side surface 4 Right side surface 5 Joint 6 Jig 9 Foam 10 Backup material 11 Inner foam layer 12 Outer foam layer 13 Slit

Claims (7)

A backup material formed from a foam that is long in one direction.
A first surface along the one direction, a second surface facing the first surface, a third surface along the one direction, and a fourth surface facing the third surface are provided.
In a cross-sectional view orthogonal to the one direction, the first surface and the second surface are curved so as to be convex in the direction from the first surface toward the second surface, and the second surface is formed. Is longer than the length of the first surface,
When the backup material is placed on a horizontal plane with the first surface facing downward, the angle formed by the vertical line orthogonal to the horizontal plane and the third surface is 40 ° or less in the cross-sectional view, and the said. A backup material characterized in that the angle formed by the perpendicular line and the fourth surface is 40 ° or less. The backup material according to claim 1, wherein the angle formed by the vertical line and the third surface and the angle formed by the vertical line and the fourth surface are both 25 ° or less. The backup material according to claim 1 or 2, wherein the difference between the length of the second surface and the length of the first surface is 3 mm or more and 7 mm or less in the cross-sectional view. In the cross-sectional view, the length of the first surface is 10 mm or more and 35 mm or less.
The backup material according to any one of claims 1 to 3, wherein the length of the second surface is 15 mm or more and 40 mm or less. The backup material according to any one of claims 1 to 4, wherein the density of the foam on the second surface is smaller than the density of the foam on the first surface. The step of preparing the backup material according to any one of claims 1 to 5, and
A method for installing a backup material, which comprises a step of arranging the backup material so that the first surface faces the joint and pressing the second surface. The process of preparing a cylindrical foam that extends in one direction,
A step of cutting the cylindrical foam along the one direction to obtain a plurality of backup materials, and
The backup material is arranged so that the surface corresponding to the inner peripheral surface of the cylindrical foam faces the joint, and the step corresponding to the outer peripheral surface of the cylindrical foam is pressed.
A method for installing a backup material, wherein the plurality of backup materials include the backup material according to any one of claims 1 to 5.

Images