JP2597405Y2 - Spacer for exterior material - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer used for bonding an exterior material, and more particularly, to bonding an exterior material to an outer wall of a building by connecting and joining a plurality of such materials to the exterior wall. The present invention relates to a spacer for an outer wall material provided between the material and the material.

[0002]

2. Description of the Related Art Usually, when an exterior material is bonded to an outer wall of a building, the joint is sealed with a sealant to prevent infiltration of rainwater or the like from the joint of the exterior material, and at the joint portion, A spacer made of a flexible material is provided between the outer wall and the exterior material.

[0003]

However, conventionally used spacers are formed by cutting, punching, and forming a crosslinked low-density polyethylene foam generally called a crosslinked sheet.
Since it was subjected to secondary processing such as cutting, the manufacturing process was very complicated and extremely poor in productivity. In particular, in a punching process or a cutting process for determining the outer shape of the spacer, the cut surface is not flat, but a radius is formed, and the joining surface at the connecting portion of the spacer provided adjacently is formed. The surfaces could not contact each other, causing a gap in the connecting portion.

If such a gap is formed at the connection portion of the spacer, when sealing the joint of the exterior material with the sealant, the sealant flows out from the gap and sealing cannot be performed satisfactorily. There was a problem that workability was deteriorated. Furthermore, when rainwater or the like intrudes from the sealing portion due to sealing failure of joints or the like, the presence of a gap in the connecting portion of the spacer allows the infiltrating rainwater or the like to further infiltrate into the exterior material from the gap. This led to water leakage.

[0005] Japanese Patent Publication No. 2-38962 discloses that the joint surface at the end of the connecting portion is not perpendicular to the surface of the exterior material but is inclined, so that rainwater or the like from a gap generated in the connecting portion can be prevented. Attempts have been made to prevent infiltration, but it is also difficult to completely prevent infiltration of rainwater or the like from gaps. Furthermore, it is difficult to keep the degree of overlap of the spacers constant when the joining surfaces at the ends are inclined, and in some cases the spacers may be displaced from a predetermined position, so that the spacers are connected well. However, there is a risk that this will cause trouble. Therefore, even if the surface of the spacer is adjusted to the shape of the back surface of the exterior material, the surface of the spacer and the back surface of the exterior material do not exactly match, which may be another cause of infiltration of rainwater or the like.

The present invention has been made to solve such a problem, and can be connected and joined without forming a gap in a connecting portion thereof, and an exterior material capable of preventing infiltration of rainwater or the like. It is an object to provide a spacer for use.

[0007]

Means for Solving the Problems The spacer for exterior material of the present invention is a spacer which is used by joining and joining a plurality of exterior materials at the time of laminating the exterior material. It is molded, and the surface shape matches the rear surface shape of the exterior material, and the connecting portions provided at both ends in the longitudinal direction have flat joining surfaces.

According to the present invention, the spacer for the exterior material is integrally formed by so-called in-mold molding, in which after the polyolefin-based resin foamed particles are filled in a molding die, the foamed particles are heated to fuse the particles together. It is obtained in. Further, as the base resin of the polyolefin resin expanded particles used for molding the spacer for the exterior material of the present invention, high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, ethylene- A propylene copolymer, a copolymer of propylene and an α-olefin having 4 to 8 carbon atoms, one kind selected from an ethylene-propylene-butene terpolymer, or a mixture of two or more kinds, or a mixture thereof. Copolymer as a main component, or a mixture can be mentioned, but in terms of versatility, buffering properties, flexibility, and the like, linear low-density polyethylene and low-density polyethylene are preferable among the above-described base resins. . Further, these may be non-cross-linked or cross-linked.
Crosslinked low density polyethylene is particularly preferred in view of high temperature compression set at a temperature of 0 ° C.

In the present invention, a mixture of these base resins with inorganic substances such as magnesium hydroxide, calcium carbonate, talc, mica, clay, etc. in an amount of 5 to 40% by weight may be used. Quasi-noncombustibility and heat resistance, which are important for building materials of the spacer, can be improved. It is preferable that a flame retardant such as a bromine compound or a phosphorus compound is added to the base resin in an amount of 3 to 15% by weight.
Furthermore, in view of the use of the spacer for the exterior material of the present invention, the buffering property is also a very important property, but a rubber component such as ethylene-propylene rubber, isoprene rubber, butadiene rubber or the like is added to the base resin in an amount of 3 to 25% by weight. By mixing
The buffering property can be further improved.

As a means for producing expanded particles from the base resin as described above, for example, the base resin is melt-kneaded by an extruder, extruded into strands, then cooled and then cut into appropriate lengths, or After cutting to an appropriate length, first produce pellet-shaped resin particles by means such as cooling, and then
The obtained resin particles are dispersed in a dispersion medium such as water in a closed container in the presence of a foaming agent, and heated to a temperature equal to or higher than the softening temperature of the resin particles to impregnate the resin particles with the foaming agent. Open one end of the rear container and release the resin particles and water simultaneously under a lower pressure atmosphere (usually under atmospheric pressure) than the container while maintaining the pressure in the container at a pressure higher than the vapor pressure of the blowing agent. Means such as foaming the resin particles to produce expanded particles can be employed. In addition, the base resin for producing the expanded particles may be either a non-crosslinked one or a crosslinked one as described above, but when the expanded particles are produced using the crosslinked one, The above resin particles are produced from a non-crosslinked resin, and the resin particles are subjected to appropriate means to form crosslinked resin particles, which are foamed to form expanded particles.

As blowing agents for expanding the resin particles, propane, butane, pentane, hexane, cyclobutane, cyclohexane, trichlorofluoromethane, dichlorodifluoromethane, chlorofluoromethane, trifluoromethane, 1,2,2, 2-tetrafluoroethane, 1-chloro-
Volatile blowing agents such as 1,1-difluoroethane, 1,1-difluoroethane, 1-chloro-1,2,2,2-tetrafluoroethane, and inorganic gas-based blowing agents such as nitrogen, carbon dioxide, argon, and air Can be used. Above all, an inexpensive inorganic gas-based blowing agent that does not destroy the ozone layer and is preferable, and particularly preferable is one containing nitrogen, air, and carbon dioxide as main components.
Further, a mixed foaming agent of a volatile foaming agent and an inorganic gas-based foaming agent is also preferable from the viewpoint of easy control of the expansion ratio of the resin particles. Further, the amount of the foaming agent used is usually 2 to 50 parts by weight per 100 parts by weight of the resin particles, and when nitrogen and air are used as the foaming agent, the pressure within the pressure range of ^{20 to} 60 kgf / cm ^2. The amount of the foaming agent used is appropriately selected depending on the relationship between the foaming ratio and the foaming temperature of the foamed particles to be obtained.

The dispersing medium for dispersing the resin particles may be any one which does not dissolve the resin particles. Examples of such a dispersing medium include water, ethylene glycol, glycerin, methanol, ethanol and the like. Usually, water is used.

In such means, when dispersing the resin particles in a dispersion medium and heating the resin particles to a foaming temperature, an anti-fusion agent can be used to prevent fusion between the resin particles. As the anti-fusing agent, any inorganic or organic one can be used as long as it does not dissolve in water or the like and does not melt by heating. In general, an inorganic one is preferable. Powders such as kaolin, talc, mica, aluminum oxide, titanium oxide, and aluminum hydroxide are suitable as the inorganic anti-fusion agent. Anionic surfactants such as sodium dodecylbenzenesulfonate and sodium oleate can also be suitably used as a dispersing aid. The anti-fusing agent has an average particle diameter of 0.001.
It is preferably from 100 to 100 µm, particularly preferably from 0.001 to 30 µm, and the addition amount of the anti-fusing agent is usually preferably from 0.01 to 10 parts by weight based on 100 parts by weight of the resin particles. Further, the surfactant is usually 0.001 to 100 parts by weight of the resin particles.
It is preferable to add 5 parts by weight.

The foaming temperature at which the resin particles and the dispersion medium are released under a low-pressure atmosphere from the container to cause foaming depends on the kind of resin generally used (including whether or not the resin is crosslinked) and the foaming agent. Although it differs depending on the type and the amount of use, as an example, when a non-crosslinked polyolefin resin particle is used as the resin and an inorganic gas type is used as the blowing agent, the melting point of the resin is −5 ° C. or more. Melting point + 15 ° C or less,
In particular, the melting point is preferably higher than or equal to −3 ° C. and lower than or equal to + 10 ° C. When the crosslinked polyolefin-based resin particles are foamed using an inorganic gas-based foaming agent and / or an organic volatile foaming agent, the temperature is preferably equal to or higher than the melting point before crosslinking and equal to or lower than the melting point + 80 ° C. Further, the heating temperature at the time of heating to the foaming temperature is preferably 1 to 10 ° C / min, particularly preferably 2 to 5 ° C / min. The atmosphere in which the expandable resin particles and the dispersion medium are released from the inside of the container may be at a lower pressure than the container, but is usually at atmospheric pressure. The melting point of the above-mentioned resin was determined by using a differential scanning calorimeter to measure about 3 to 6 mg of a sample.
Heat to 220 ° C at a heating rate of ° C / min, then 10 ° C
The temperature at the top of the endothermic peak (intrinsic peak) in the DSC curve obtained when the temperature was lowered to about 50 ° C. at a rate of temperature decrease of 10 ° C./min and raised to 220 ° C. again at a rate of 10 ° C./min.

The foamed particles obtained as described above are optionally aged under pressure with an inorganic gas or a mixed gas of an inorganic gas and a volatile foaming agent to apply a predetermined internal pressure to the particles. The foamed particles can be filled as they are or in a compressed state in a molding die that can be sealed but cannot be sealed, and the foamed particles are heated by steam at a temperature near the melting point of the base resin to form particles. Are fused and then cooled to obtain a spacer for an exterior material of the present invention, which is integrally molded according to the mold.

The foam density of the exterior material spacer of the present invention is appropriately selected depending on the type of the base resin, etc., and is usually 0.025 to 0.050 g / cm ³ , and more preferably 0.030 g / cm ^3. ０．０0.040 g / cm ³ , and in such a range, better flexibility, strength and the like can be exhibited as a spacer. The density is 0.0
When it is less than 25 g / cm ³ , it becomes too flexible and has good adhesion to the exterior material, but has poor strength for holding the exterior material as a spacer. On the other hand, when the density exceeds 0.050 g / cm ³ , the adhesiveness to the exterior material is deteriorated due to poor flexibility, which may cause rainwater to enter.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a spacer according to the present invention; FIG. 1 is a perspective view showing an example of a spacer for an exterior material of the present invention, and FIG. 2 is an explanatory view showing an example of use of a spacer for an exterior material of the invention. Also,
3 and 4 are a sectional view taken along line III-III and an end view taken along line IV-IV in FIG.

The exterior material spacer 1 shown in FIG. 1 is provided with joints 7 in a direction perpendicular to the corrugated sheet-like exterior material 5.
(FIG. 2), which is formed by the in-mold molding method of the expanded polyolefin-based resin particles as described above.

The exterior material spacer 1 has recesses 3 and 3 formed on the surface thereof in accordance with the waveform of the exterior material 5 so that the surface shape matches the rear surface shape of the exterior material 5. Further, as shown in FIG. 2 and the like, a plurality of spacers 1 for the exterior material can be connected and joined along joints 7 at both ends in the longitudinal direction.
As shown in FIG. 5, FIG. 6, etc., connecting portions 2, 2 having a flat joining surface 2a are provided. The joining surface 2a is preferably formed by a combination of a vertical surface and a horizontal surface as shown in FIGS. The surface shape given to the exterior material spacer 1 in the present invention is not limited to the shape as in the illustrated example, and it goes without saying that a shape that matches the back surface shape of various exterior materials is appropriately selected. Nor.

In the figure, reference numeral 8 denotes a joint groove formed on the center line of the exterior material spacer 1 in the longitudinal direction.
In the present invention, such joint grooves need not be formed as in another example of the exterior material spacer 1 shown in FIG. When the joint groove 8 is formed, it may be formed integrally with the exterior material spacer 1 by an in-mold molding method.
Alternatively, it may be formed by secondary processing such as cutting in accordance with the balance between the quantity to be manufactured and the productivity.

On the other hand, the length of the exterior material spacer 1 in the longitudinal direction is set so that the interval at which the exterior materials 5, 5 'are overlapped and the connection interval of the spacers 1, 1' match as shown in FIG. In addition, it is preferable to appropriately select the length according to the size of the exterior material 5. If such a length is selected, the connecting portion 2 is crimped when the exterior material 5 is attached, and the adhesion between the joint surfaces is further improved. It becomes something.

In order to attach the exterior material 5 to the outer wall 4 of the building using the exterior material spacer 1 having such a configuration,
First, two or more sets of a plurality of spacers 1, 1 '... Connected and joined as shown in FIG. 3, for example, are adhered in parallel at predetermined intervals to predetermined positions on the outer wall 4 using an adhesive or the like. I do. Next, the exterior materials 5 and 5 are attached to each other so that no gap is formed between the exterior material 5 and the spacer 1, and the exterior material 5 is attached to the outer wall 4 via the spacer 1 by appropriate means 6 such as screwing and nailing. . Finally, the sealing agent 6 may be injected from the joint 7 of the exterior material, and the joint 7 may be sealed. When screwing or nailing, it is preferable to interpose a cushioning material such as a rubber bush between the screw head and the exterior material as a method of preventing vibration in the building from vibrating the exterior material.

Further, in the present invention, the shape of the connecting portions provided at both ends in the longitudinal direction of the exterior material spacer 1 is limited to the shape shown in one example of the exterior material spacer 1 or another example. FIG. 5 (a),
The shape shown in (b) may be used, and a material having better workability can be appropriately selected as needed.

In the present invention, it is particularly important that the exterior material spacer is formed by integral molding with a mold using foamed particles, and as a result, the exterior material spacer of the present invention can be punched and cut. Conventional spacers that have excellent productivity without the need for secondary processing, etc., and are formed on the processed surface by such processing, and the joining surface of the connecting part becomes a curved surface And has a flat joining surface. Therefore, the joining surface of the connecting portion can be brought into close contact with the joining surface of the connecting portion of another spacer which is connected and joined by a surface contact without leaving a gap.
In addition, unlike the conventional one, there is no need to bother the end portion with a slope, and any one having better workability can be arbitrarily adopted. The connection interval can be made constant, and it is very easy to exactly match the spacer front surface with the back surface of the exterior material.

The exterior material attached via the exterior material spacer of the present invention is usually a metal plate, a straight plate,
An inorganic lightweight plate mainly composed of concrete or the like, a resin plate of phenol resin or the like is used, and in particular, a non-combustible or semi-combustible material is preferably used. In addition, the exterior materials of the present invention include exterior materials of buildings such as houses, of course,
Shutters and the like are also included.

Next, the spacer for an exterior material of the present invention will be described in more detail with reference to specific examples.

Example 1 Silica was added to 100 parts by weight of low-density polyethylene.
A mixture of 3 parts by weight and 0.3 parts by weight of borax was melt-kneaded at a temperature of 200 ° C. by an extruder and extruded in the form of a strand. Cutting was performed so that the ratio became L / D = 2.5 to obtain about 7 mg of a pellet. Next, 1000 g of the obtained pellets were placed in a 5-liter autoclave with water 3.
000 g, dicumyl veroxide 4.8 as a crosslinking agent
g, 2 g of magnesium carbonate as a dispersant, and zinc carbonate 8.
The mixture was charged together with 3 g, the temperature was raised from room temperature to 150 ° C., and the temperature was maintained. By a crosslinking step of about 4 hours, crosslinked low density polyethylene resin particles were obtained. Thereafter, 1000 g of the crosslinked low-density polyethylene resin particles were placed in a 5 liter autoclave, 3000 g of water as a dispersion medium, 10 g of kaolin as a dispersant, 0.1 g of sodium dodecylbenzenesulfonate as a surfactant, and 80 g of carbon dioxide gas as a foaming agent.
After raising the temperature from normal temperature to 140 ° C. over about 1 hour and holding it for 5 minutes, one end of the autoclave is opened to release the particles into a low pressure region, thereby obtaining a bulk density of 0.045 g / cm 3. ³ foamed particles were obtained. Further, an inner pressure of ² kg / cm ² (G) is applied to the obtained foamed particles, and the foamed particles are heated with steam to have a bulk density of 0.03 / cm ^2.
5 g / cm ³ of expanded particles were obtained. Subsequently, after applying an internal pressure of 1.42 kg / cm ² (G) to these foamed particles, a flat joint surface is formed on a connecting portion provided at an end together with a surface shape matching the back surface shape of the exterior material. 0.6-1.2 kg / cm ²
(G) integrally molded with water vapor
The final product was obtained by curing at 0 ° C. for 24 hours.

The obtained final product is a good spacer in which the joining surface of the connecting portion provided at the end is formed flat, and as a result of using this spacer as a backing material for a shutter, the workability is also good. And good adhesion with shutters,
There was no problem with the sealing work of the joints, and there was no intrusion of rainwater or the like even at the connection portion of the spacer end.

[0029]

[Effects of the Invention] As described above, the spacer for the exterior material of the present invention is excellent in productivity and has a flat joint surface at the connecting portion. When joining and joining, no gap is formed in the joining portion, and the joint sealing work can be performed well. Even when rainwater or the like intrudes from the sealing portion due to poor sealing or the like, the infiltration of rainwater or the like can be prevented by the exterior material spacer of the present invention.

Further, unlike the conventional one, the end portion does not need to be made into an inclined surface, and a shape having better workability can be arbitrarily adopted, so that the connection interval of the spacers can be made constant. It is extremely easy to exactly match the surface of the spacer with the rear surface of the exterior material.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a spacer for an exterior material of the present invention.

FIG. 2 is an explanatory view showing an example of use of an example of a spacer for an exterior material of the present invention.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is an end view taken along line IV-IV in FIG. 2;

FIG. 5 is an explanatory view showing another example of a connecting portion of the spacer for an exterior material of the present invention.

FIG. 6 is a perspective view showing another example of a spacer for an exterior material of the present invention.

FIG. 7 is a perspective view showing another example of a spacer for an exterior material of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior material spacer 2 Connecting part 2a Joining surface 5 Exterior material

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichiro Shimada 3-3-3 Higashi Jujo, Kita-ku, Tokyo (56) References Japanese Utility Model Sho-62-158008 (JP, U) Japanese Utility Model Sho-62-158009 (JP) , U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) E04F 13/08

Claims (1)

(57) [Scope of request for utility model registration] 1. A spacer which is used by joining and joining a plurality of exterior members when bonding the exterior members, wherein the spacers are formed by integral molding of polyolefin resin expanded particles with a mold, and the surface shape of the spacers is the rear surface shape of the exterior material. And a connecting part provided at both ends in the longitudinal direction has a flat joining surface.