JP3789577B2 - Insulation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to improvement of an underfloor heat insulating material fitted between members such as joists of a floor of a building.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a heat insulation construction technique is known in which a plate-like foam is fitted into a member such as a joist, a pillar, or a rafter in order to improve heat insulation properties such as a floor, wall, or ceiling of a building. At this time, for example, in the case of Japanese Utility Model Publication No. 61-46096, the front and back surfaces of the plate can be fitted in close contact even if there are some errors in the spacing between members such as joists, pillars, rafters, etc. A large number of slit grooves extending along the longitudinal direction are formed at predetermined width intervals, and are fitted with elasticity in the lateral width direction.
[0003]
Further, in the case of actual Japanese Utility Model No. 2-13617, if the slit groove is provided in almost the entire width direction, there is a problem that the intermediate portion having a weak compressive force is likely to hang down. In the case of Japanese Utility Model Laid-Open No. 6-78410, as a heat insulating material for roofs, it is in a range of about 1/4 near both ends in the width direction. In addition to forming slit grooves, hook-shaped notches are formed on both end surfaces in the width direction so that the rafters can be securely held.
[0004]
[Problems to be solved by the invention]
By the way, when imparting stretchability by forming slit grooves in this way, in order to increase the stretchability, generally measures such as increasing the number of slit grooves or increasing the groove width of the slit grooves, etc. However, if the number of slits is increased, the processing takes time and the efficiency becomes poor.If the groove width is widened, the gap between the grooves to be inserted is too wide to leave a large gap. In addition, there is a problem in that the strength near the groove portion is insufficient and damage is likely to occur.
[0005]
Therefore, there has been a demand for a technique that can improve the stretchability without increasing the number of slits, suppress thermal defects, and ensure the strength near the groove.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a plate-like member made of styrene foam that is inserted between the members according to claim 1, and has a predetermined depth on both the left and right ends in the widthwise direction and the front and back sides near the center. In the heat insulating material in which a plurality of slit grooves are formed, taper surfaces that are inclined along the thickness direction are formed on both left and right end surfaces of the heat insulating material so that the width width on the back surface side is narrower than the width width on the front surface side. In addition, at least one of the slit grooves on the surface side was a stepped groove having a groove width on the surface layer side wider than the groove width on the deep layer side. According to a second aspect of the present invention, when the taper surface is compressed to the maximum from the width direction of the heat insulating material, it becomes a surface parallel to the side surface of the member.
[0007]
Here, styrene foam generally deforms in the shrinking direction when it receives a compressive force, but the restoring force when the compressive force is removed is weak. Therefore, a slit groove is formed in such a styrene foam to give stretchability, and at the same time, tapered surfaces are provided on both end surfaces in the width direction so that the width width on the back side is narrower than the width width on the front side. Moreover, it is preferable that the depth of the groove is ½ or more of the thickness of the heat insulating material.
Further, the interval for providing the groove is preferably wider than the groove width and narrower than the thickness of the heat insulating material, but not all may be equally spaced, and may be both end portions and the central portion, or only both end portions. .
In addition, the degree of inclination of the tapered surfaces provided at both end faces in the width direction is such that when the heat insulating material is compressed to the maximum (the slit groove is not crushed), the inclined tapered surfaces at the left and right end parts are parallel to the side surfaces of the member. It is preferable to be a smooth surface. This is because if the tapered surface is inclined too much, when the heat insulating material is inserted between the members, the contact area between the side surface of the member and the both end surfaces of the heat insulating material is reduced, and a gap is likely to be generated. This is because it is not preferable.
[0008]
And, in the slit groove on the surface side with a wide width interval, a groove having a wider groove width on the surface layer side than the groove width on the deep layer side is formed to increase the elasticity on the surface layer side, for example, when fitted between members It is easy to insert if it is inserted from the back side with a narrow width interval, and it can be fitted in close contact because of its large stretchability on the surface side with a wide width interval. And by using this groove shape and the tapered surface of the end face in combination, the number of slit grooves required for the heat insulating material can be reduced, and the efficiency of the heat insulating material creation and the insertion between the members can be reduced. It is possible not only to improve workability when fitting, but also to improve heat insulation efficiency as a heat insulating material. As the shape of the groove, a stepped groove can be used. Further, the shape of the groove and the inclination of the tapered surface are appropriately selected depending on the thickness and density of the heat insulating material.
[0009]
At this time, the groove width on the deep layer side of the groove should be such that it can be easily adhered when subjected to a compressive force, for example, compression so that the groove in the wide groove portion on the surface layer side does not adhere completely. Even with a force, if the groove on the deep layer side is in close contact, the gap forming portion is limited to the surface layer side, so that thermal defects can be reduced.
In addition, if the groove width on the deep layer side is not widened, strength reduction near the groove can be prevented.
[0010]
According to a third aspect of the present invention, as slit grooves, at least near the left and right end portions in the lateral width direction, three sides on one side are formed in a staggered pattern on the front and back sides, and these three slit grooves on one side are provided on the side of the lateral surface. The book and the back side were formed alternately.
[0011]
Generally, it is said that there is a variation of about ± 6 mm in the distance between members such as joists under the floor. For this reason, for example, it is necessary to secure a shrinkage of about 6 mm on one side.
Further, the groove width of the slit groove is preferably 5 mm or less, more preferably about 2 mm or less, because the heat insulation effect is reduced when remaining as a gap, and convection occurs to cause thermal deficiency. Also, the number of slit grooves is preferably as small as possible from the viewpoints of heat insulation effect and convection prevention.
[0012]
For this reason, for example, if at least three slit grooves having a groove width of about 2 mm are formed on one side, the required 6 mm on one side is necessary near the middle in the thickness direction where the groove cut from the front side and the groove cut from the back side overlap. The amount of shrinkage of about a certain degree is secured, and on the surface side, if one groove on the surface layer side with a wide groove width and one slit groove are combined, for example, the width of the wide groove portion is about 4 mm, The necessary shrinkage of about 6 mm on one side on the surface side is secured. On the back side, if the cut-off portion for forming the tapered surface and one slit groove are combined, for example, if the maximum cut-out width for forming the tapered surface is about 4 mm or more, it is necessary on the back side. A shrinkage of about 6 mm on one side is secured.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a sectional view of the heat insulating material of the present invention, and FIG. 2 is a perspective view.
The heat insulating material of the present invention is, for example, a plate member made of styrene foam that is closely fitted between the joists under the floor of a building, and when the floor is attached to the upper part of the joists, heat is transferred through the floor material. It is made to block being done.
[0014]
And, the interval between the joists under the floor is generally uneven due to installation error or the dry state of the wood, etc., and usually when a heat insulating material molded to the same width as the specified width is inserted, A gap may be formed because the joist and the heat insulating material cannot be brought into close contact with each other. In this case, there is a problem that the heat insulating effect is impaired or the heat insulating material falls.
And in order to prevent this, if it is going to improve adhesiveness, for example using a foam with elasticity, such as foaming polyethylene, cost will rise.
[0015]
Therefore, this proposal uses an inexpensive styrene foam, is molded slightly larger than the specified width, minimizes thermal defects while ensuring the necessary amount of expansion and contraction with the minimum slit groove, and is easy to fit. It was taken care of so that it could be done.
[0016]
That is, as shown in FIGS. 1 and 2, the heat insulating material 1 is a rectangular plate-shaped member cut out from a large styrene foam block with a predetermined size, or a rectangular plate-shaped formed by molding or extrusion molding. The dimensions of the member are, for example, a length of 1820 mm or 920 mm, a width of 263 mm or 422 mm, and a thickness of 25 mm, 30 mm, or 40 mm. And the heat insulating material of a suitable dimension can be selected and used suitably by the space | interval of a joist, the expected heat insulation effect, etc.
[0017]
Three slit grooves 2, 3, and 4 are formed on the front and back surfaces near both ends in the width direction, respectively, and two of the slit grooves 2, 3 are cut from the front surface (upper surface) side. At the same time, one slit groove 4 is cut from the back surface (lower surface) side. As shown in FIG. 1, the outermost slit groove 2 is configured as a wide groove whose groove width on the surface layer side is wider than the groove width of the deep layer portion, and the other two slit grooves 3, 4 are The groove width is constant. In addition, a total of three grooves 3, 4 are also provided near the center, one on the front side and two on the back side.
[0018]
Further, the slit grooves 2, 3, 4 are alternately formed at predetermined intervals, and the depths of the grooves 2, 3, 4 are all formed with a length of more than half the thickness. 2. Uncut thickness of 2, 3, 4
And when each slit groove | channel 2, 3, 4 remains as a clearance gap, this uncut thickness becomes the thickness of the heat insulation material 1 substantially, and it achieves a heat insulation effect.
[0019]
In addition, a tapered surface 5 is formed on both left and right end surfaces in the lateral width direction so as to incline from a portion entering the thickness direction from the front surface side, and the lateral width interval on the back surface side is cut from the end portion by the tapered surface 5. It is cut off and narrowed.
When the taper surface 5 is subjected to maximum compression from the lateral direction so that there is no groove spacing between the slit grooves 2, 3 and 4 when fitted into the joists, it becomes parallel to the side surfaces of the joists and comes into close contact with the joists. I try to get together.
[0020]
By the way, as described above, the pitch between joists has a variation of about ± 6 mm, and in order to absorb this variation, it is necessary to provide a stretchability of about 6 mm on one side. For this reason, in this example, when the dimensions were set to the following specific dimensions, the variation in pitch between the joists could be effectively absorbed, and there were few thermal defects.
That is, for example, in the case of the heat insulating material 1 having a length of 1820 mm, a width of 422 mm, and a thickness of 30 mm, the groove widths of the slit grooves 2, 3, and 4 near both ends in the width direction are 2 mm, and the width of the wide groove is 4 mm. The groove interval is 15 to 20 mm, the uncut thickness of the groove is 10 to 15 mm, the distance between the tapered surface 5 forming portions is 10 mm, and the cut-off width is 5 mm.
[0021]
For this reason, the amount of expansion / contraction on one side on the back side is 5 mm for the cut-off width and 2 mm for the groove width of the slit groove 4, for a total of 7 mm, and the necessary amount of expansion / contraction for 6 mm on one side is ensured. The insertion work can be facilitated depending on the amount. Further, the amount of expansion / contraction on one side of the intermediate portion in the thickness direction is 6 mm in total by overlapping the thickness 2 mm of the groove widths of the slit grooves 2, 3, 4. A total of 6 mm is secured by the groove width of 2 mm and the wide groove 2 of 4 mm.
In addition, since the amount of expansion and contraction of 2 mm is secured on the front surface portion and 4 mm on the back surface portion in the central portion, it is possible to cope with large variations in joists. The three grooves at the center may not be provided when the variation between joists is small.
[0022]
When the heat insulating material 1 as described above is fitted between the joists, the heat insulating material 1 is inserted from the back side, for example, one end side of the heat insulating material 1 is brought into contact with the end of the joist on one side, and the other end side of the heat insulating material 1 is attached. Push inside the joist on the other side. At this time, since the lateral width interval on the back surface side is narrowed by the tapered surface 5, it can be pushed in relatively easily.
[0023]
And when the back side is inserted, the whole is pushed in and it fits to the surface side. At this time, since the stretchability on the surface layer side is largely ensured by the wide groove 2 of the slit groove on the surface side, it can be fitted without difficulty and the adhesion between the joists and the heat insulating material 1 can be enhanced.
[0024]
Moreover, in the heat insulating material 1 having such a structure, if the gaps between the slit grooves 2, 3, and 4 are generally left, the heat insulating effect may be deteriorated without securing the substantial thickness of the heat insulating material 1. However, in the case of the present invention, the groove width on the deep layer side of the stepped slit groove 2 is narrow and easily crushed by the compressive force from the side. Even if the wide and wide groove 2 on the upper layer side is not completely crushed, thermal defects can be reduced. In addition, at least the slit grooves 2, 3, and 4 are few on one side and easy to process, and since the groove width on the deep layer side of the slit groove 2 is not widened, it is difficult to cause a decrease in strength around the groove portion.
[0025]
In addition, when the outer slit groove 2 has a stepped shape as in the embodiment, it is easier to be deformed when receiving a compressive force from the outside, and from the viewpoint of improving adhesion and reducing thermal defects. Although it is advantageous, the inner slit groove 3 can be formed into a stepped shape, and both the slit grooves 3 and 4 may be formed into a stepped shape. As a result, even if the variation between joists is large, do not provide extra slit grooves in the center and other parts (with the minimum number of slit grooves required), and ensure a compatible expansion / contraction amount in the heat insulating material. It becomes possible [0026]
Moreover, although the case where the heat insulating material is disposed under the floor has been described as an example in the above embodiment, the present invention can also be applied to a heat insulating material disposed on a wall.
[0027]
【The invention's effect】
As described above, according to the present invention, in the heat insulating material made of styrene foam, the taper surfaces are formed on the left and right end surfaces of the heat insulating material to narrow the width interval on the back surface side, and the slit groove on the front surface side. Since at least one of the slit grooves is a groove having a different groove width, thermal deficiency can be reduced while ensuring stretchability, and the number of slit grooves can be reduced as compared with a conventional heat insulating material.
Moreover, the strength reduction near the groove can be prevented.
And, when the taper surface is made parallel to the side surface of the member when compressed to the maximum from the width direction as in claim 2, the end surface of the heat insulating material and the side surface of the member are in close contact with each other to increase the heat insulation efficiency. I can do it.
Further, as in claim 3, if there are three slit grooves on one side, it is possible to more efficiently secure stretchability and suppress thermal defects.
[Brief description of the drawings]
FIG. 1 is a sectional view of a heat insulating material according to the present invention. FIG. 2 is a perspective view of a heat insulating material according to the present invention.
DESCRIPTION OF SYMBOLS 1 Heat insulating material 2 Grooves with different groove widths 3 Slit grooves 4 Slit grooves 5 Tape surface

Claims (3)

In a heat insulating material in which a plurality of slit grooves are formed with a predetermined depth on both front and back both sides in the lateral width direction and near the center part, which is a plate-like member made of styrene foam that is inserted between the members,
By forming tapered surfaces that are inclined along the thickness direction on the left and right end surfaces of the heat insulating material, the width width on the back side is made narrower than the width width on the front side,
A heat insulating material characterized in that at least one of the slit grooves on the surface side is a stepped groove having a groove width on the surface layer side wider than the groove width on the deep layer side. The heat insulating material according to claim 1, wherein the tapered surface is a surface parallel to a side surface of the member when compressed to the maximum from a width direction of the heat insulating material. The heat insulating material according to claim 1 or 2, wherein the plurality of slit grooves are formed in a streak pattern on one side of the front and back surfaces at least in the vicinity of the left and right ends in the width direction. The heat insulating material characterized in that two slit grooves on one side are formed alternately with two on the front side and one on the back side.

Images