JP7114241B2 - Protective material for guide members - Google Patents

Description

TECHNICAL FIELD The present invention relates to a protective material (or curing material) useful for protecting (or curing) guide members (grooved guide members or long members) such as lintels and rail members, and a method for producing the same.

Sliding members such as sliding doors, fusuma (sliding doors), shoji (paper screens), and curtains, or guide members (such as lintels, thresholds, and rail members) capable of guiding opening and closing members are long and difficult to handle. Along with the movement or transportation of such a guide member, there is a possibility that the guide member and/or the contacted member may be damaged by coming into contact with surrounding contacted objects (walls, pedestals, equipment, etc.).

In Japanese Patent Laid-Open No. 10-88904 (Patent Document 1), a bent portion in which a hard plate is bent into a U-shaped cross section corresponding to the cross-sectional shape of the groove of the lintel, and one side edge of this bent portion a protective plate (kamoi-groove protective plate) having a narrow extending portion formed on the edge of the bent portion, a wide extending portion formed on the other side edge of the bent portion, and a mounting hole formed on the wide extending portion is described. However, although this protective plate can protect the groove of the lintel, it cannot protect the outer periphery of the lintel. Therefore, damage to the lining and damage to the non-contact member cannot be effectively prevented.

Japanese Patent Application Laid-Open No. 2001-182331 (Patent Document 2) describes a tubular thermoplastic resin foam having a crack continuous in the longitudinal direction, wherein the crack is formed in a cross section perpendicular to the longitudinal direction. A protective material is described in which both side edges are tucked inside the cracks and are less deformed in the longitudinal direction. This document describes that the protective material is formed of a polyethylene-based resin foam having an apparent density of 0.02 to 0.2 g/cm ³ , that the lintels that are arranged horizontally and the pillars that are arranged vertically are used. When the protective material is attached to the material to be protected, the protective material will not come off from the material to be protected.

However, since this protective material is formed of a cylindrical foam with both side edges wrapped inside the crack, it is difficult to attach the protective material to an object to be protected such as a lintel. It is necessary to spread it widely (for example, spread it so that it is inverted) and attach it to the object to be protected. Therefore, it is not possible to improve the mountability to the object to be protected. On the other hand, if the space between the side edges is widened in order to improve mountability, the gripping force with respect to the object to be protected is reduced, and there is a risk of the device falling off from the object to be protected. Therefore, it is not possible to achieve both mountability and clamping force with respect to the object to be protected.

Japanese Patent Application Laid-Open No. 10-88904 (claim 1, FIG. 1) Japanese Patent Application Laid-Open No. 2001-182331 (claim 1, claim 3, FIG. 1)

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a protective material (or curing material) capable of effectively protecting a guide member (grooved guide member) having grooves (guide grooves) formed thereon, and a manufacturing method thereof.

Another object of the present invention is to provide a protective material (or It is to provide a curing material) and its manufacturing method.

Still another object of the present invention is to provide a protective material (or a curing material) capable of stably and effectively protecting a front wall having grooves even in a long grooved guide member, and a method of manufacturing the same. It is in.

The present inventors focused on the groove (guide groove) of a guide member (or long member) such as a lintel, and as a result of intensive studies to achieve the above-mentioned problem, when the fitting portion is formed with a resin foam, the resin Not only can the fitting portion be easily attached or fitted to the groove portion by utilizing the elastic deformability of the foam, but also the fitting portion can be tightly attached to the groove portion, and at least the front wall (groove portion side) of the guide member (or elongated member) can be In addition, by forming the clamping portion made of resin foam, the side wall or the rear wall of the guide member can be gripped or clamped by utilizing the elastic deformability, and the fitting portion with respect to the groove is high. The protective material can be attached firmly and stably to the grooved guide member based on the adhesion and the gripping or clamping force of the clamping portion, and at least the front wall (groove portion side) of the guide member can be reliably and effectively protected. I found what I could do and completed the present invention.

That is, the protective material (curing material) of the present invention is a guide member formed of a resin foam and having grooves (for example, grooves for guiding sliding members such as sliding doors, shoji screens, curtains, and opening/closing members). (or long members). The protective material is formed on at least a covering portion of the guide member (or elongated member) that can be arranged on the groove side (a protective portion that can be arranged along the groove side surface), and the covering portion. and a fitting portion that can be attached or fitted to the groove.

Such protective material extends from at least one side (or end) of the sheath and is positionable on at least one side wall or rear wall of the guide member (e.g. gripping side or rear wall). Alternatively, a clamping portion that can be clamped may be provided. The protective material may include a pair of clamps extending from both sides (or both ends) of the cover and capable of gripping or clamping the side walls or the rear wall of the guide member. In addition, the protective material is not limited to a single protective material, and may be formed of a plurality of protective materials capable of covering the groove portion side of the guide member (for example, the groove portion side formed along the longitudinal direction of the guide member). good too. For example, a first protective material capable of longitudinally covering a first area on the groove side of the guide member and a second protective material capable of covering a second area of the guide member on the groove side along the longitudinal direction. A protective material may be provided. The first protective material includes a first fitting portion that can be attached or fitted to the first groove portion of the first region, and a first fitting portion that extends from the fitting portion and can cover the first region. and a first clamping portion extending from a side (end) of the first covering portion and positionable on one of the side walls or the rear wall of the guide member (e.g., the side wall or the rear wall). The second protective material may be provided with a second fitting capable of being attached or fitted to the second groove of the second region. a joint portion, a second covering portion extending from the engaging portion and capable of covering the second region, and a side portion (end portion) of the second covering portion extending from the other side wall of the guide member or and a second jaw positionable on the rear wall (eg, a second jaw capable of gripping or pinching the side wall or the rear wall). In a guide member including a plurality of grooves in the width direction, the first and second regions may be predetermined regions in the width direction that include the grooves (grooves extending in the longitudinal direction) on the groove side of the guide member. . In addition, the first protective material and the second protective material may have a form in which the single protective material is divided into a plurality of parts (particularly, divided into two parts) along the longitudinal direction, and the cross-sectional shape is They may be symmetrical to each other.

More specifically, the covering portion may be formed in a flat shape that can be arranged along the groove-side mounting surface of the guide member, and the fitting portion protrudes from the covering portion and has a width greater than that of the groove. may have a wide portion (for example, an inverted trapezoidal cross section, a head with a large diameter). Further, the clamping portion may extend inwardly from a side portion (or end portion) of the covering portion. Furthermore, the sandwiching portion may be curved and inclined inwardly (in a mutually narrowing direction) from both sides (or both ends) of the covering portion.

With such a protective member, the integration of the protective member with respect to the guide member can be greatly improved by fitting the groove portion and the fitting portion, and the protective member can be held with a high holding force with respect to the guide member. Furthermore, when the holding portion is formed, the fitting portion or the groove portion is used as a base point in the mounted state, and the holding portion is elastically deformed to contact the side wall portion or the rear wall of the guide member. It is possible to hold the protective material with a higher holding force.

The guide member (or long member) is not particularly limited as long as it has a groove, and may be at least one member selected from, for example, a lintel, a threshold, and a rail member.

A protective material formed of such a resin foam can be produced by extruding a foamable resin composition containing a molten soft resin from a die mouthpiece. In this method, a mouthpiece provided with a discharge part having a shape corresponding to the cross-sectional shape of the protective material, for example, a linear discharge part (discharge part corresponding to the covering part) and a discharge part extending protruding from the discharge part ( a discharge portion corresponding to the fitting portion), and, if necessary, a bend extending from at least one side of the linear discharge portion in a direction perpendicular to the direction in which the linear discharge portion extends or inclined inward. An expandable resin composition containing a molten soft resin is extruded from a nozzle provided with a discharge portion (discharge portion corresponding to the clamping portion) and foamed to produce the protective material.

The present invention also includes a guide member (or elongated member) to which the protective material is attached. Such a guide member has a form in which the fitting portion is mounted or fitted in the groove portion. In addition to such a fitting or mounting form, it may have a form in which a clamping portion is arranged on at least one of the side walls or the rear wall (or the side wall or the rear wall is gripped or clamped by the clamping portion). Furthermore, the present invention also includes a method of attaching the protective material to protect the guide member. In this method, the fitting portion is mounted or fitted in the groove to mount the protective material on the guide member, and the protective material is mounted on the guide member. The method may further comprise placing a jaw on at least one of the side walls or the rear wall (or gripping or clamping the side wall or the rear wall with a jaw) to attach the protective material to the guide member.

In the present invention, the term “flat covering portion” is used to mean not only a covering portion having flat outer/inner surfaces, but also a flat form as a whole, for example, a gently curved form. The protection by the protective material means not only protecting the guide member from damage, but also protecting the contacted body with which the protective material contacts from damage.

In the present invention, the protective material (or curing material) is formed of a resin foam and has a fitting portion that can be fitted into the groove. ) formed thereon (grooved guide member) can be effectively protected. Furthermore, if a clamping portion that can be arranged on the side wall or the rear wall (or a clamping portion that can be gripped or clamped against the side wall or the rear wall) is provided, the fitting strength and the gripping or clamping force can be used to The guide member (grooved guide member) in which (the guide groove) is formed can be more effectively protected. In addition, by utilizing the elastic deformability of the foam, it can be easily attached to the grooved guide member, and has a high retainability to the grooved guide member, so that both attachability and retainability to the grooved guide member can be achieved. . In particular, even with a long grooved guide member, at least the front wall (groove side) in which the groove is formed can be stably and effectively protected.

FIG. 1 is a schematic cross-sectional perspective view showing an example of the mounting state of the protective material of the present invention. 2 is a schematic perspective view showing the protective member of FIG. 1. FIG. FIG. 3 is a schematic cross-sectional perspective view showing another example of the mounting state of the protective member of the present invention. FIG. 4 is a schematic cross-sectional perspective view showing still another example of the mounting state of the protective material of the present invention. FIG. 5 is a schematic perspective view showing still another example of the protective material of the present invention.

The present invention will be described in detail below with reference to the accompanying drawings as necessary. In the following examples, common members or elements are denoted by the same reference numerals.

In the example shown in FIGS. 1 and 2, a lintel 1 is shown as a grooved guide member having two grooves 2, 3 extending in parallel along the longitudinal direction at a predetermined interval to protect such a lintel. A protective material 11 for protecting is formed of a resin foam containing a soft resin.

The protective material 11 includes a flat covering portion (or protective portion) 12 that can be arranged along the front wall (groove portion side) of the lintel 1 in which the grooves 2 and 3 are formed, and the covering portion. A fitting portion 13 having an inverted trapezoidal cross-section that is protruded from a portion corresponding to the grooves 2 and 3 and can be fitted to the grooves 2 and 3, and a fitting portion 13 that is curved from both sides of the covering portion 12. It is provided with a clamping part 14 that extends and can be arranged on both side walls of the lintel 1 , and the clamping part 14 can grip or clamp both side walls of the lintel 1 .

Since the fitting portion 13 of the protective member 11 has an inverted trapezoidal shape in cross section, when the fitting portion 13 is fitted or attached to the grooves 2 and 3, the fitting portion 13 (especially at least the wide ) is compressed and deformed and crushed so that the fitting portion 13 can be tightly attached or fitted to the groove portions 2 and 3, and the fitting portion 13 is fitted or attached to the two groove portions 2 and 3. Therefore, the fitting strength of the fitting portion 13 to the grooves 2 and 3 and the holding property of the protective member 11 to the lintel 1 can be greatly improved. In addition, in a state in which the fitting portions 13 are fitted in the grooves 2 and 3, the sandwiching portions 14 can be positioned on both side walls of the lintel 1 to make contact (or can be gripped or sandwiched by the sandwiching portions 14). The protective material 11 can be stably and firmly held against. Therefore, by using the fitting to the grooves 2 and 3 and the gripping or pinching of both side walls of the lintel 1, the lintel 1 can be effectively protected without the protective member 11 coming off or being displaced from the lintel 1. - 特許庁In particular, since the protective material 11 is formed of a soft resin foam, the elastic deformability of the protective material 11 can be used to improve the mountability to the grooves 2 and 3, and to improve the retention to the lintel 1. It is possible to achieve both wearability and retainability.

In the illustrated example, in order to protect both ends of the lintel 1 in the longitudinal direction, the protective members 11 are attached to the lintel 1 in such a manner that the protective members 11 protrude in the longitudinal direction from both ends of the lintel 1 in the longitudinal direction. .

In addition, the covering portion of the protective material does not have to be flat. , curved or curved (especially gently curved or curved inwardly and/or outwardly). A preferable covering portion has a flat or plate-like shape that can be arranged on the front wall (groove side) of the guide member in which the groove is formed (in particular, it can be arranged along the mounting surface of the front wall). good too.

In addition, the protective material does not have to be attached in a form protruding in the longitudinal direction from the longitudinal end of the guide member. For example, the ends of the protective material may be located at the ends of the guide member in the longitudinal direction (for example, they may be flush with each other). ), the longitudinal ends of the guide member may extend from the protective member.

The fitting portion of the protective material is formed in the covering portion, and it is sufficient that it can be attached or fitted to the groove portion of the guide member, and the fitting portion can be formed to protrude from the covering portion. The cross-sectional shape of the fitting portion is not particularly limited, and may be, for example, a rectangular shape (square, rectangular, etc.), an elliptical shape, or the like. A preferable cross-sectional shape of the fitting portion is a shape having a wide portion larger in width than the groove portion (for example, a wide portion formed in a region from the intermediate portion to the tip portion in the direction in which the fitting portion protrudes). , an inverted trapezoidal shape, a shape having a head in the middle or at the tip, a mushroom shape, and the like. Such a wide portion can be brought into close contact with the inner wall of the groove due to the compression recovery property of the resin foam, and is useful in increasing the strength of fitting to the groove. The width of the base of the fitting portion (rising portion from the covering portion) may be equal to or smaller than the width of the groove of the guide member.

The fitting portion need not be in close contact with the groove, and the peripheral wall of the fitting portion may contact the inner wall of the groove. In a preferred embodiment, the fitting portion is often in contact with the groove portion in a form of compressive deformation or elastic deformation. If necessary, the fitting portion may have a hollow structure (hollow shape).

When a plurality of grooves are formed in the guide member, the fitting part may be attached or fitted to at least one groove. That is, the protective material may have at least one fitting portion. In addition, if a plurality of fitting portions that can be attached or fitted to a plurality of groove portions are provided, the fitting strength can be increased, and the retention of the protective material on the guide member can be improved.

The sandwiching portion of the protective material is not necessarily required, and the sandwiching portion may be formed according to the type of the guide member. The holding portion extends from the side portion (or end portion) of the covering portion so long as it can be arranged (contactable) on the side wall or rear wall side of the guide member, and the length of the holding portion is , and may have a length capable of contacting at least the side walls of the guide member, and may have a length capable of contacting the rear wall of the guide member. The clamping portion may extend from the side (or end) of the covering portion in a direction orthogonal to the extending direction of the covering portion (if necessary, slightly outward). In order to increase the gripping or clamping force on the side wall and/or the rear wall, it may extend from the side (or end) of the cover at an inward inclination with respect to the direction in which said cover extends. . The jaws may extend inwardly (either linearly or curvedly slanted) from the sides (or ends) of the cover. It should be noted that the curved shape of the holding portion may be, for example, a curved shape that bulges outward in the lateral direction (lateral direction).

The protective material has a predetermined length corresponding to the guide member, and may generally be elongated corresponding to the guide member, and is provided at a predetermined portion of the guide member (for example, at least at both ends in the longitudinal direction or It may be short in order to protect both sides, or at least both sides or both sides and at least one part located between these parts. Furthermore, the fitting portion and the clamping portion may be formed continuously along the longitudinal direction of the protective material, and if necessary, cut or notched at predetermined locations (or at predetermined intervals). good too. It should be noted that the protective member does not have to extend or protrude from the end or end face of the guide member, and the end face of the protective member may be positioned along the end face of the guide member in the mounted state.

The protective material is not limited to a single protective material, and is formed of a plurality of protective materials capable of covering the groove portion side of the guide member (for example, the front wall or the groove portion side formed along the longitudinal direction of the guide member). You may For example, the covering portion of the protective material only needs to be able to cover the front wall (groove side) of the guide member along the longitudinal direction (with a predetermined length). It may be possible to coat the front wall along a direction (with a given length). For example, the protective material may be formed of a plurality of divided protective materials that are divided along the longitudinal direction in at least one portion such as the central portion in the width direction. Also, the holding portion may be positioned on one side wall and/or the rear wall (rear side) of the guide member, and the holding portion may be formed so as to wrap around the side wall of the guide member.

The protective material shown in FIG. 3 has a form in which the protective material shown in FIGS. and a second protective member 21b capable of covering the second region of the guide member 1 on the groove side along the longitudinal direction. The protective member 21a and the second protective member 21b are formed so that their cross-sectional shapes are symmetrical to each other. In addition, in this example, the lintel is simply described as a guide member.

The first protective member 21a includes a first fitting portion 23a having an inverted trapezoidal cross section that can be attached or fitted to the first groove portion 2 of the first region, and extends from this fitting portion, A first covering portion 22a capable of covering the first region, and a first holding portion extending from a side portion (or an end portion) of the first covering portion and capable of being arranged on one side wall of the guide member 1. 24a, and this first clamping part 24a can grip or clamp one side wall of the guide member 1. As shown in FIG.

Similarly to the first protective member 21a, the second protective member 21b also has a second fitting portion having an inverted trapezoidal cross section that can be attached or fitted to the second groove portion 3 of the second region. 23b, a second covering portion 22b extending from the fitting portion and capable of covering the second region, and a side portion (or end portion) of the second covering portion extending from the other side of the guide member 1. and a second jaw 24b positionable on the side wall, the second jaw 24b also being capable of gripping or clamping the other side wall of the guide member.

Even in the protective material including the first protective material 21a and the second protective material 21b, the first and second fitting portions 23a and 23b are not in contact with the grooves 2 and 3 of the guide member 1. Since both side walls of the guide member 1 can be held or clamped by the first and second clamping portions 24a and 24b in the fitted configuration, the guide member 1 can be effectively protected in the same manner as the protective member 11 described above. Further, in the front wall of the guide member 1, the end side wall of the first protective member 21a and the end side wall of the second protective member 21b are adjacent to each other. The members 21a and 21b are not displaced or dropped.

As shown in FIG. 3, when the protective material is formed of a plurality of protective materials (protective material elements), the end side walls of adjacent protective materials on the front wall of the guide member 1 may be in close contact with each other. Since each protective member is highly retainable with respect to the guide member 1, they may be spaced apart by a predetermined distance. That is, by fitting the grooves and the fitting parts, the retention of each protective member on the guide member 1 can be greatly improved, and the side wall part or the rear wall of the guide member can be secured with the fitting part or the groove part as a base point. Since the holding portion is arranged (especially, the holding portion is elastically deformed and contacts), the protective member can be held with a high holding force with respect to the guide member.

In addition, the sandwiching portion of the protective material may be arranged on one of the side walls and/or the rear wall of the guide member. is not particularly limited to

FIG. 4 shows an example of a protective material 41 that can be applied to the guide member 31 having three grooves 32, 33, and 34. This protective material 41 can be arranged on the groove side of the guide member 1. A flat covering portion 42, three fitting portions 43 protruding from the covering portion, having a head at the tip, and capable of being attached or fitted to the groove portion, and the covering portion 42. A pair of clamps curved and inclined in a narrowing direction from both sides (or both ends) and extending to the end of the rear wall of the guide member 1 (slightly toward the rear wall from the corner of the side wall and the rear wall). a portion 44; In addition, a curved portion or locking portion 44a is formed at the tip portion of the holding portion 44 in order to enhance the locking property with respect to the corner portion.

Even with such a protective member 41, due to the elastic deformation of the fitting portion 43 into the groove portions 32, 33, and 34 of the guide member 31, and the gripping, clamping force, and locking force of the corner portions of the guide member 31, The guide member 31 can be effectively protected.

In addition, it is not always necessary to form a curved portion or a locking portion in the clamping portion (particularly, the distal end portion of the clamping portion), but in order to improve the holding property (graspability or clamping property) with respect to the guide member, The wall and/or the rear wall (including the corner portion) may be formed with a bulge or curved portion that can contact, and the locking portion (engaging portion) that can be locked to the corner portion of the side walls and the rear wall. stop protrusion, etc.) may be formed. In preferred embodiments, the jaws are capable of gripping or clamping or locking the sidewalls and/or rear walls (including corners) of the guide member.

Further, as described above, it is not necessary that the fitting portion is attached or fitted to all of the plurality of grooves (three grooves in the above example), and at least one groove (in the above example, For example, the fitting portion may be attached or fitted to two grooves on both sides. For example, in the protective member 11 shown in FIGS. 1 and 2, the guide member 31 may be fitted with a protective member having a holding portion 44 having a form shown in FIG.

Furthermore, if necessary, the clamping portion (tip of the clamping portion) may be positioned facing the rear wall (back side) of the guide member, or the entire guide member may be covered or covered with a protective material. Good, but in order to protect the front wall, at least both side walls (both side walls and/or rear wall) of the guide member are provided with jaws (or at least both side walls (both side walls and/or rear wall) are gripped or clamped). If possible.

As long as the protective material can protect at least the groove portion of the guide member (long member), the holding portion is not necessarily required. For example, as shown in FIG. 5, the protective material 51 is a flat or plate-like covering portion (or and a fitting portion 53 having an inverted trapezoidal cross-section that protrudes from the covering portion and can be fitted into each of the plurality of grooves of the guide member. The width of such a protective material is formed to be larger than the width of the guide member, and both sides of the flat or plate-like covering portion 52 (both sides extending in the lateral direction from the fitting portion 53) are It may protrude from the side of the guide member in the mounted or mated state to protect the side of the guide member. Also, the width of the protective material may be equal to or smaller than the width of the guide member, and both sides of the flat or plate-like covering portion 52 may be positioned on both sides of the guide member in the mounted or fitted state. , may be located in the inner region in the width direction of the guide member.

Even if the protective material does not have holding portions on both sides, it is sufficient that the fitting portion has a form that can be fitted into at least one groove portion of the guide member in the same manner as described above. The protective material may be formed of a plurality of divided protective materials divided along the longitudinal direction at appropriate locations such as the central portion of the .

The guide member may have at least one groove along the longitudinal direction, and may have a plurality of grooves (for example, 2 to 5, preferably 2 to 4, especially about 2 or 3 grooves). good too. Examples of such guide members include lintels, sills, and rail members. ), sliding members such as folding doors, folding doors, shutters, opening and closing members, or partition members. The material of the guide member is not particularly limited, and may be, for example, wood, metal (such as stainless steel or aluminum), plastic, or resin. Even if the guide member is made of wood and is easily damaged, the guide member can be effectively protected from being damaged by attaching the protective material of the present invention.

The resin foam can be formed from an expandable thermoplastic resin composition containing a soft resin. Examples of thermoplastic resins include olefin resins, styrene resins, vinyl chloride resins, vinyl acetate resins, polyvinyl alcohol resins, acrylic resins, polyacetal resins, polyester resins, polycarbonate resins, polyamide resins, Examples include thermoplastic elastomers. These resins may be used alone or in combination of two or more. Among these resins, olefin-based resins (e.g., ethylene-based resins, propylene-based resins, etc.), styrene-based resins (e.g., polystyrene, etc.), thermoplastic elastomers (e.g., olefin-based thermoplastic elastomers, styrene-based thermoplastic elastomers, etc.) ) is preferable, and from the viewpoint of excellent mechanical properties such as flexibility and elasticity, it is preferable to include at least a soft resin (for example, an olefin-based resin (especially an ethylene-based resin)).

Olefin resins include polyethylene (polyethylene such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene), polypropylene, and α-C _2-4 chain olefins such as ethylene-propylene copolymers alone or in copolymers. coalescence, ethylene-vinyl acetate copolymer (EVA resin), and the like. These olefinic resins can also be used alone or in combination of two or more. As olefinic resins, polyethylene-based resins such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene are generally used. The polyethylene-based resins also include metallocene polyethylene-based resins prepared using a metallocene catalyst.

The thermoplastic resin composition contains a conventional foaming agent as a foaming component, and the foaming agent may be a decomposable foaming agent (chemical foaming agent). Volatile blowing agents (physical blowing agents) may also be used. Volatile foaming agents include, for example, inorganic foaming agents (nitrogen, carbon dioxide, oxygen, air, water, etc.), organic foaming agents (aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, chlorocarbons hydrogen, fluorocarbons, alcohols, ethers, aldehydes, ketones, etc.). Among these, lower aliphatic hydrocarbons such as butane (n-butane, isobutane) and pentane (n-pentane, isopentane, etc.) are widely used because they are inexpensive and have low toxicity.

The proportion of the foaming agent is, for example, 0.01 to 30 parts by weight, preferably 0.1 to 25 parts by weight, and more preferably 1 to 20 parts by weight (especially 5 to 15 parts by weight) with respect to 100 parts by weight of the resin. degree.

The foamable resin composition may contain a cell regulator. Examples of cell regulators include silicon compounds (talc, silica, zeolite, etc.), inorganic acid salts (carbonates or hydrogen carbonates such as sodium carbonate, sodium hydrogen carbonate, etc.), organic acids or salts thereof (citric acid, citric acid, sodium stearate, calcium stearate, aluminum stearate, zinc stearate, etc.), metal oxides (zinc oxide, titanium oxide, aluminum oxide, etc.), metal hydroxides (aluminum hydroxide, etc.). These cell control agents may be used alone or in combination of two or more.

The ratio of the cell control agent is, for example, 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, and more preferably 0.1 to 3 parts by weight (especially 0.5 parts by weight) with respect to 100 parts by weight of the resin. ~2 parts by weight).

The foamable resin composition may contain an anti-shrinkage agent. Examples of shrinkage inhibitors include fatty acid esters (esters of _C8-24 fatty acids and polyhydric alcohols such as palmitic acid mono- to triglycerides and stearic acid mono- to triglycerides), fatty acid amides (palmitic acid amide, stearic acid amide, etc.). C _8-24 fatty acid amides, etc.). These shrinkage inhibitors can be used alone or in combination of two or more.

The proportion of the shrinkage preventing agent is, for example, 0.01 to 30 parts by weight, preferably 0.05 to 20 parts by weight, more preferably 0.1 to 10 parts by weight (especially 1 to 5 parts by weight) with respect to 100 parts by weight of the resin. parts by weight).

The foamable resin composition contains conventional additives such as colorants (dyes, pigments, etc.), surface smoothing agents, stabilizers (antioxidants, heat stabilizers, ultraviolet absorbers, etc.), viscosity modifiers, phase Solubilizers, dispersants, antistatic agents, antiblocking agents, antifog agents, fillers (calcium carbonate, carbon fiber, etc.), lubricants, release agents, lubricants, impact modifiers, plasticizers, flame retardants, biocides (Bactericidal agents, bacteriostatic agents, antifungal agents, antiseptic agents, insect repellents, etc.), deodorants, and the like may be included. These additives can be used alone or in combination of two or more.

The expansion ratio of the foam made of the expandable resin composition is not particularly limited as long as it has cushioning properties. 50 times), more preferably about 20 to 45 times (for example, 25 to 40 times). If the foaming ratio is too low, there is a risk that the impact absorption will be reduced, and if it is too high, there is a risk that the gripping force, mechanical strength, and flexibility for the guide member will be reduced.

The average cell diameter of the foam is, for example, approximately 0.3 to 3 mm, preferably 0.4 to 2 mm, more preferably 0.5 to 1.8 mm (especially 0.8 to 1.5 mm). If the average cell diameter is too small, the cushioning properties may deteriorate, and if it is too large, the mechanical properties will deteriorate.

The foam structure of the foam may be an open-cell structure, but a structure containing at least closed cells is preferable, and a closed-cell structure (closed-cell structure) is particularly preferable. The volume ratio of closed cells to the entire cells (total of open cells and closed cells) is, for example, 85 to 100%, preferably 90 to 100% (eg, 90 to 99%), more preferably 93 to 100% ( For example, it may be about 93 to 99%).

The present invention also includes guide members (such as lintels) to which protective materials are attached. In this guide member, the protective member is attached in such a manner that the fitting portion is attached or fitted in the groove portion. In a preferred embodiment, the protective member is further mounted in such a manner that a clamping portion is arranged on at least one of the side walls or the rear wall (or the side wall or the rear wall is gripped or clamped by the clamping portion). Furthermore, the present invention also includes a method of attaching the protective material to the guide member to protect the guide member. This method also protects the guide member by mounting or fitting the fitting portion in the groove portion. Furthermore, by arranging a clamping portion on at least one side wall or rear wall (or gripping or clamping said side wall or rear wall with a clamping portion), the guide member can be more effectively protected.

In addition, as described above, a long protective material may be attached over the entire length of the guide member (or long member), and a short protective material may be attached to a predetermined portion (at least one or a plurality of portions in the longitudinal direction) of the guide member. A protective material (short protective material) may be attached. Moreover, the protective material may be attached in the form of extending in the longitudinal direction from the end portion or end surface of the guide member, or may be attached along the end portion or end surface of the guide member. For example, on both sides of the guide member, a short protective material is attached in a form extending in the longitudinal direction from the end or end surface of the guide member, and at least one portion (or a plurality of protective members) is attached to the middle region in the longitudinal direction of the guide member. part) may be fitted with a short protective material.

[Method for producing protective material]
The protective material of the present invention can be produced by extruding a foamable resin composition containing a molten soft resin from a die nozzle. That is, the protective material can be manufactured by extruding and foaming the expandable resin composition from a die having a discharge portion having a shape corresponding to the cross-sectional shape of the protective material. In this method, the mouthpiece has a linear discharge portion (discharge portion corresponding to the covering portion) and an extended discharge portion (discharge portion corresponding to the fitting portion) projecting and extending from the discharge portion. and a bent discharge portion (discharge portion corresponding to the holding portion) extending from at least one side portion of the linear discharge portion at an angle in a direction perpendicular to or inward with respect to the direction in which the linear discharge portion extends. may be provided.

The extending form of the extending discharge part can be formed according to the cross-sectional shape of the protective material, and in many cases it protrudes and extends in a direction perpendicular to or crossing the direction in which the linear discharge part extends. In addition, the curved discharge portion often extends in a direction orthogonal to the direction in which the linear discharge portion extends or in a direction that narrows each other, and extends from at least one side portion (for example, both side portions) of the linear discharge portion. may be

By such extrusion foaming, it is possible to continuously manufacture a protective material formed of a linearly elongated foam. If necessary, long protective materials may be cut to a predetermined length for use.

Melt-kneading and extrusion foaming can be carried out by conventional methods. Examples of extruders include single-screw extruders (e.g., vented extruders, etc.), multistage extruders (e.g., tandem extruders, etc.), and the like. A shaft-type tandem extruder, etc.) may also be used.

The method of introducing the foaming agent is not particularly limited, and it may be blended in the resin composition in advance, or a foaming component (eg, butane) may be introduced into the extruder. For example, a resin composition is put into a first extruder on the upstream side of a twin-screw tandem extruder, a foaming component is injected from the middle of the first extruder to form a foamed resin composition, and a foamed resin composition is formed on the downstream side. A second extruder may be used to cool the mixture to an appropriate foaming temperature and extrude it from the mold. The screw diameter of the second extruder is, for example, 1.1 to 1.5 times, preferably about 1.2 to 1.4 times the screw diameter of the first extruder. good too.

The extruded foamed resin composition may be cooled by injecting a cooling medium (especially compressed air) such as compressed air, a blower (air), or water in parallel with the cooling step using the sizing die. The temperature of the cooling medium is not particularly limited, and may be, for example, about 0 to 60°C, preferably about 10 to 50°C. In the method of injecting compressed air, the pressure of air may be, for example, about 0.1 to 10 MPa, preferably about 0.2 to 5 MPa (eg, 0.3 to 1 MPa). The injection amount of compressed air may be, for example, 100 to 1000 liters/minute, preferably about 200 to 500 liters/minute.

EXAMPLES The present invention will be described in more detail below based on examples, but the present invention is not limited by these examples.

Example 1
A resin composition having the following formulation is charged into the first extruder (screw diameter 65 mm) of a tandem extruder (manufactured by Plagiken Co., Ltd.), and butane gas [i-butane/n- After injecting 10 parts by weight of butane (volume ratio) = 20/80, the second extruder (screw diameter: 90 mm) was adjusted to an appropriate foaming temperature, and continuously extruded and foamed from the nozzle attached to the tip. Then, a foam (protective material) having a cross-sectional shape shown in FIG. 2 was obtained.

The expansion ratio of the foam (protective material) is 25 times, and the cross-sectional shape of the covering portion is 116 to 120 mm in outer dimension, 100 to 105 mm in inner dimension, and an average thickness of 100 to 105 mm. Approximately 8 to 10 mm, the dimensions of the fitting part are 10 to 15 mm in height from the covering part, 21 to 25 mm in width at the top, and 15 to 25 mm in width at the base, and the dimensions of the gripping part (or clamping part) are , the outer dimension (height) was 28 to 30 mm, the inner dimension was 20 mm, and the average thickness was about 8 to 10 mm.

(resin composition)
LDPE (manufactured by Sumitomo Chemical Co., Ltd., "F101") 100 parts by weight Shrinkage inhibitor: monoglyceride stearate (manufactured by Nippon Boehringer Co., Ltd., "ACTIV325") 3.2 parts by weight Foaming nucleating agent: Talc (Nippon Talc ( Co., Ltd. “Micro Ace K-1”, average particle size 7.4 μm) 1.7 parts by weight

The fitting part of such a protective material is pressed into two grooves of a lintel with a length of 1800 mm (groove width 21 mm, depth 15 mm) to fit or mount, and the clamping parts on both sides are both side walls of the lintel When the protective material was attached to the lintel and strongly vibrated in the vertical direction, the protective material was tightly held to the lintel without being detached from the lintel or displaced.

The protective material (or curing material) of the present invention can effectively prevent damage to grooved guide members and damage to contacted objects that come into contact with guide members during transportation, transportation, interior construction, and other processes. It is useful for protecting or curing upper frames (lintels) and lower frames (sills) of (for example, indoor fittings) and rail members.

1, 31... Guidance member (kamoi)
2, 3, 32 to 34... Grooves 11, 21a, 21b, 41... Protective material 12, 22a, 22b, 42... Covering parts 13, 23a, 23b, 43... Fitting parts 14, 24a, 24b, 44... Sanding parts

Claims (7)

A protective material for protecting a guide member formed of a resin foam and having grooves,
A covering portion of the guide member that can be arranged on the groove side so as to cover at least the groove; a fitting portion that is formed on the covering and can be attached or fitted to the groove; and a pair of clamping portions capable of gripping or clamping both side walls or the rear wall of the guide member, wherein the fitting portion is formed to have an inverted trapezoidal cross-section having a wide top portion wider than the groove portion. and the holding portion is curved and slanted inward from both sides of the covering portion. A first protective material capable of longitudinally covering a first region on the groove side of the guide member, and a second protective material capable of longitudinally covering a second region of the guide member on the groove side. and
The first protective material includes a first fitting portion that can be attached or fitted to the first groove portion of the first region, and a first fitting portion that extends from the fitting portion so as to cover the first region. and a first clamp extending from a side of the first covering and positionable on one side wall or rear wall of the guide member,
The second protective material includes a second fitting portion that can be attached or fitted to the second groove portion of the second region, and a second fitting portion that extends from the fitting portion so as to cover the second region. and a second clamping portion extending from the side of the second covering portion and capable of being arranged on the other side wall or rear wall of the guide member. . 3. The protective member according to claim 1, wherein the covering portion is formed flat so as to be arranged along the mounting surface of the guide member on the side of the groove, and the fitting portion is formed to have an inverted trapezoidal cross section. 4. The protective material according to any one of claims 1 to 3, wherein the guide member is at least one selected from a lintel, a threshold, and a rail member. A method for manufacturing a protective material formed of a resin foam by extruding a foamable resin composition containing a molten soft resin from a die mouthpiece, wherein the cross section of the protective material according to any one of claims 1 to 4 A method for producing the protective material according to any one of claims 1 to 4 by extruding and foaming a foamable resin composition containing a molten soft resin from a die having a discharge part having a shape corresponding to the shape. A guide member to which the protective material according to any one of claims 1 to 4 is attached in a form in which the fitting portion is attached or fitted in the groove portion. A method for protecting a guide member by attaching or fitting the fitting portion to the groove portion and attaching the protective material according to any one of claims 1 to 4 to the guide member.

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