JP6870919B2 - Male hook-and-loop fastener and ceiling structure using it - Google Patents

Description

The present invention relates to a male hook-and-loop fastener, more specifically, a male hook-and-loop fastener that does not easily damage an engaging partner, and a ceiling structure using the male hook-and-loop fastener.

Conventionally, as one of the means for attaching an object to the surface of an object, a male hook-and-loop fastener having a hook-shaped engaging element is fixed to the surface of either the object or the object, and a loop is formed on the other surface. A method is used in which an object is attached to the surface of an object by fixing a loop hook-and-loop fastener having a shape engaging element and then overlapping both hook-and-loop fasteners to engage both engaging elements.

As a work to attach such a hook-and-loop fastener to the surface, first fix one hook-and-loop fastener to the surface of the object, fix the other hook-and-loop fastener to the surface of the object, and then superimpose the surfaces of the double-sided fasteners. A method of pressing and engaging with each other is performed. At this time, in order to confirm whether or not the object is accurately attached to the predetermined position, it is called alignment, and the distance is such that the object to which the surface fastener is fixed is in contact with the surface fastener of the object. The alignment is performed.

However, in the case of the conventional hook-and-loop fastener, it is not possible to perform accurate alignment because unnecessary engagement occurs only by lightly contacting both hook-and-loop fasteners for alignment. When such unnecessary engagement occurs, it is necessary to disengage the unnecessary engagement of the hook-and-loop fastener and repeat the alignment work. Also, in order to avoid unnecessary engagement, the work of bringing both hook-and-loop fasteners close to each other to align the hook-and-loop fasteners is omitted, and the hook-and-loop fasteners are directly strengthened to an appropriate place on the surface of an object or object. When it is attached to (that is, when the main stop is performed directly without alignment), the attachment position of the object may deviate from the correct position, which causes a malfunction. Then, when the unnecessary engagement is disengaged, a new unnecessary engagement may occur or the object may be damaged in some cases.

Furthermore, especially when the object has a large shape, for example, in the case of a ceiling material or wall material of a house, or a wall material or floor material of a ceiling material or a trunk room in an automobile, unnecessary engagement is removed and realignment is performed. It takes a lot of labor and effort to repeat the work of performing the above, and when it is necessary to install the ceiling material, floor material, etc. within a certain period of time in the production line of an automobile that flows at a constant speed, the position If the alignment fails, it will be necessary to stop the production line, and it is extremely important to perform the alignment accurately and promptly.

In order to solve such a problem, it is necessary that unnecessary engagement does not occur simply by superimposing both hook-and-loop fasteners at the time of alignment, and a temporary fixing function that satisfies such a requirement is provided. An excellent male hook-and-loop fastener has been reported (Patent Document 1).

According to Patent Document 1, as a surface fastener having an excellent temporary fixing function, a male type having a D / H of 0.35 to 0.75 and a substrate coverage of an engaging element of 25 to 45% is satisfied. Molded hook-and-loop fasteners are described. This male molded surface fastener is excellent in terms of temporary fixing function, but on the other hand, since the engaging protrusion is thick and strong, when the engagement is disengaged, the loop surface fastener of the engaging partner is looped. Easy to cut the engaging element. Therefore, if the engagement and disengagement are repeated, the engagement force of the loop surface fastener of the engagement partner may be impaired.

International Publication No. 2012/014667 Japanese Unexamined Patent Publication No. 2014-76210

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hook-and-loop fastener that does not easily damage the loop surface fastener of the engaging partner. Then, the present inventors have found that the engaging protrusions are easily bent by dividing the engaging protrusions of the male molded surface fastener into a plurality of small protrusions on the way.

On the other hand, as a technique for dividing the engaging protrusion into a plurality of small protrusions on the way, for example, the fastener member described in Patent Document 2 is known. However, in the fastener member described in Patent Document 2, since a plurality of thick engaging protrusions project in different directions, the loop-shaped engaging element rarely engages with two or more engaging protrusions at the same time. .. Therefore, it is not possible to prevent the surface fasteners from being displaced from each other after engagement, and there is a problem that the surface fasteners cannot be firmly fixed at an accurate position. The present invention also solves such a problem.

That is, the male hook-and-loop fastener according to one aspect of the present invention has a large number of male engaging elements erected on the surface of a substrate made of resin, and the male engaging elements stand up from the resin substrate. A male hook-and-loop fastener having an engaging protrusion protruding from the stem to the side, wherein the engaging protrusion extends in a direction away from the stem and is arranged in a direction orthogonal to the height direction of the stem. It is characterized in that it is branched into protrusions, and that the plurality of branched small protrusions are parallel to each other.

Further, in the male hook-and-loop fastener, the length (D) from the tip of the male engaging element to the lower end of the engaging protrusion with respect to the height (H) from the substrate to the tip of the male engaging element. ) Is preferably 0.30 to 0.60.

Further, in the male hook-and-loop fastener, it is preferable that the engaging protrusion is branched into a plurality of small protrusions from the base of the engaging protrusion at a portion of 1/5 to 1/2 of the protruding length of the engaging protrusion. ..

Further, in the male hook-and-loop fastener, it is preferable that a wedge-shaped cut exists between the plurality of branched small protrusions.

Further, it is preferable that the plurality of branched small protrusions are two or three small protrusions.

Further, in the male hook-and-loop fastener, it is preferable that the male engaging element has a protrusion for preventing sticking protruding in a direction away from the substrate above the engaging projection.

Further, in the male hook-and-loop fastener, the height of the male engaging element is preferably in the range of 1.3 to 3.0 mm.

Further, in the male hook-and-loop fastener, the substrate coverage of the male engaging element is preferably 30 to 45%.

Further, in the male hook-and-loop fastener, it is preferable that the small protrusions become thinner toward the tip.

Further, in the male hook-and-loop fastener, it is preferable that the cross-sectional shape of the small protrusion is rectangular, and the thickness and width become thinner toward the tip portion.

Further, in the male hook-and-loop fastener, the male engaging elements are arranged in a row on the substrate, and the engaging protrusions of the male engaging elements project in the direction intersecting the row direction, but in the row direction. It is preferable that it does not protrude in the direction parallel to.

Further, in the male hook-and-loop fastener, it is preferable that the resin forming the substrate of the male hook-and-loop fastener and the male engaging element is a polyamide-based resin.

Further, the ceiling structure according to another aspect of the present invention is a structure in which a ceiling material is fixed to a ceiling base material, and the male hook-and-loop fastener is fixed to either the ceiling base material or the ceiling material. On the other hand, a female hook-and-loop fastener having a loop-shaped engaging element is fixed, and the ceiling material is attached to the ceiling base material by engaging the two.

According to the male hook-and-loop fastener of the present invention, the engaging protrusion easily warps and disengages without breaking the loop-shaped engaging element when the engagement is disengaged, and as a result, the loop-shaped engaging element is engaged. The engagement can be disengaged without cutting the coupling element.

FIG. 1 is a perspective view showing an example of an engaging element constituting the male hook-and-loop fastener of the present embodiment. FIG. 2 is a perspective view showing another example of the engaging element constituting the male hook-and-loop fastener of the present embodiment. FIG. 3 is a perspective view showing a part of an example of the male hook-and-loop fastener of the present embodiment. FIG. 4 is a cross-sectional view and a top view of the engaging element constituting the male hook-and-loop fastener used in the embodiment. FIG. 5 is a top view showing a part of the male hook-and-loop fastener used in the embodiment. FIG. 6 is a cross-sectional view and a top view of the engaging elements constituting each male hook-and-loop fastener used in the comparative example.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings and the like.

The male hook-and-loop fastener of the present embodiment has a large number of male engaging elements erected on the surface of a substrate made of resin, and the male engaging elements stand up from the resin substrate and side from the stem. A male hook-and-loop fastener having an engaging protrusion protruding from the stem, and the engaging protrusion extends in a direction away from the stem and branches into a plurality of small protrusions arranged in a direction orthogonal to the height direction of the stem. Further, it is characterized in that the plurality of branched small protrusions are parallel to each other.

According to such a configuration, the engaging protrusion easily warps and disengages without cutting the loop-shaped engaging element when the engagement is disengaged, and as a result, the loop-shaped engaging element is disengaged. It is believed that the engagement can be disengaged without disconnection. That is, the male surface fastener of the present embodiment is a male surface fastener that does not easily damage the engaging partner.

Further, according to the above configuration, since the engaging protrusions are arranged and separated in parallel with the plurality of small protrusions, the engaged loop-shaped engaging element is assumed to be engaged with one small protrusion. Two or more small protrusions that are engaged with each other are mixed. As a result, a part of the loop-shaped engaging element engages with two or more small protrusions, so that there is less room for movement between the male hook-and-loop fastener and the loop hook-and-loop fastener, and after engagement, there is less room for movement. There is also the advantage that there is little deviation between the hook-and-loop fasteners and it can be firmly fixed in the correct position.

Examples of the male engaging element constituting the male hook-and-loop fastener of the present embodiment include an engaging element as shown in FIG.

In the figure, B is a substrate made of resin for a hook-and-loop fastener, E is a male engaging element, and the male engaging element (E) is erected substantially vertically on the substrate (B). The male engaging element (E) has a stem (S) rising from the substrate and an engaging projection (T) protruding sideways from the stem at the upper portion thereof. The engaging protrusion (T) extends in a direction away from the stem and is branched into a plurality of small protrusions arranged in a direction orthogonal to the height direction of the stem (in FIG. 1, it is divided into two protrusions). ), Furthermore, the plurality of branched small protrusions are parallel to each other. The male engaging element (E) shown in FIG. 2 has a protrusion (M) for preventing sticking at the tip of the stem.

In the male engaging element (E), the engaging protrusion (T), the stem portion above the root of the protrusion, and the sticking prevention protrusion (M) may be collectively referred to as the head portion of the engaging element. is there. Therefore, it can be said that the male engaging element is composed of a stem portion having no engaging protrusion on the side and a head portion existing above the stem portion.

In a preferred embodiment, the engaging protrusion is branched into a plurality of small protrusions from the base of the engaging protrusion at a portion of 1/5 to 1/2 of the protrusion length (V shown in FIGS. 1 and 2) of the engaging protrusion. It is desirable to do. It is considered that such a configuration makes it easier to create the engaging protrusions and further prevents the engaging protrusions from breaking. More preferably, it is more desirable that the portion is branched into a plurality of small protrusions at a portion of 1/4 to 1/3.

Further, it is preferable that a wedge-shaped cut is present between the branched small protrusions. As a result, the engaging protrusions are easily bent, and there is an advantage that the loop-shaped engaging element is not easily damaged when the engagement is disengaged.

Further, it is preferable that the plurality of branched small protrusions are two or three small protrusions. As a result, there is an advantage that the position is less likely to be displaced and the position can be fixed at a predetermined position. More preferably, it is desirable that the small protrusions are branched into two from the viewpoint of preventing the small protrusions from breaking.

It is preferable that the shape of the branched small protrusions becomes thinner toward the tip. As a result, there is an advantage that the flexibility is improved and the loop engaging element is less likely to be damaged.

Further, for the same reason, it is preferable that the cross-sectional shape of the small protrusion is rectangular, and the thickness and width become smaller toward the tip.

In the male molded surface fastener preferably used in the present embodiment, a plurality of such engaging elements are usually arranged in a row at regular intervals in the vertical direction (Y direction shown in FIGS. 1 and 2). (Ie, they are lined up in rows in the plane direction where the engaging protrusions do not protrude), and such rows also exist in parallel in the lateral direction (X direction shown in FIGS. 1 and 2).

The male engaging element (E) has a stem (S) and an engaging projection (T) protruding from the stem to the side, and usually, the engaging projection (T) is symmetrically provided on both sides from the stem. It is preferable that it protrudes. The stem (S) is usually upright from the substrate (B). Then, in order to increase the engaging force, the engaging protrusion (T) protrudes parallel to the substrate or in a direction in which the tip portion is lowered toward the substrate from the parallel as shown in FIG. 1 or 2.

In a preferred embodiment, as shown in FIG. 3, the engaging elements of each male engaging element project in a direction intersecting the row direction, but project in a direction parallel to the row direction. It is desirable not to. This means that adjacent engaging elements do not exist in the same row in the lateral direction, that is, they are staggered and aligned. If they are also present in the same row in the lateral direction, the engaging projections (T) of adjacent engaging elements may be too close to each other to create a space between them, and the loop of the loop hook-and-loop fastener may not pass between them well.

The substrate (B) and the male engaging element (E) are both made of plastic, and the substrate (B) and the male engaging element (E) may be formed of different resins, but from the viewpoint of productivity. It is usually composed of the same resin.

The resin used is not particularly limited, and resins used for ordinary injection molding, for example, ABS (acrylonitrile butadiene styrene), PC (polyamide), PA (polyamide), POM (polyoxymethylene), PP ( Examples thereof include synthetic resins such as polypropylene) and PBT (polybutylene terephthalate), and polyamide resins such as nylon 6 and nylon 66. Among them, a polyamide resin is preferably used from the viewpoint of strength, heat resistance and impact resistance.

In a more preferred embodiment, the engaging element is the ratio of the length (D) from the top of the engaging element (E) to the lower end of the engaging projection (T) with respect to the height (H) of the engaging element. It is desirable that (D / H) is 0.30 to 0.60. With such a configuration, the conventional male molded hook-and-loop fastener, which is extremely difficult to align due to engagement caused by simply overlapping, has been improved, and most of the strong engagement occurs at the time of alignment. It is possible to provide a male molded hook-and-loop fastener that does not occur and a high engaging force can be obtained after the final fastening. In the case of a conventionally known engaging element of a molded surface fastener, the ratio (D / H) of the length from the uppermost portion to the lower end portion of the engaging protrusion is generally in the range of 0.15 to 0.25. is there.

In the case of a molded hook-and-loop fastener in which the height of the engaging element is extremely low, if the value of (D / H) is reduced, the engaging protrusion is inevitably thinned, whereby the engaging protrusion is easily bent. Since the required engaging force cannot be obtained, there are some that have a higher value of (D / H), but in the case of an engaging element in which the height (H) of the engaging element exceeds 1.2 mm. The range of 0.20 to 0.30 is adopted, and there is no known one in which (D / H) exceeds 0.40.

FIG. 2 is a preferable example of the male molded surface fastener used in the present embodiment, but in the engaging element of the figure, in order to increase the value of this (D / H), the top of the engaging element is used. A protrusion (M) for preventing sticking is provided. Of course, the sticking prevention protrusion does not need to be provided on the top of the engaging element, and may protrude from the engaging protrusion portion (T) in a direction away from the substrate. Further, the number of protrusions for preventing sticking does not have to be one for one engaging element, and a plurality of protrusions may be present.

Further, the sticking prevention protrusion does not have to be perpendicular to the substrate surface, and may protrude in the direction away from the substrate. Further, it is preferable that one or more protrusions for preventing sticking are present in each engaging element, but the ratio is one in every two or three engaging elements adjacent to each other in the engaging protrusion direction of the engaging element. May be good. Further, in addition to the one provided with the protrusion for preventing sticking on the top of the engaging element in this way, the head portion of the engaging element may be made extremely thick in order to increase the D / H value.

The height of the protrusion for preventing sticking or the thickness of the head portion of the engaging element is such that the above (D / H) is in the range of 0.30 to 0.60. That is, a protrusion for preventing sticking may be provided on the head portion or the thickness of the head portion may be increased so that (D / H) becomes a value of 0.30 to 0.60. If the value of (D / H) is less than 0.30, it may be easy to engage at the time of alignment, and conversely if it exceeds 0.60, strong engagement is hindered even after the final stop. In some cases, the desired engaging force may not be obtained. It is preferably in the range of 0.35 to 0.55.

When the sticking prevention protrusion is provided, if the tip of the sticking prevention protrusion is sharp, the feel of the hook-and-loop fastener becomes poor. Therefore, the sticking prevention protrusion is rounded on the head portion as shown in FIG. It is preferable that the shape is tinged with. The sticking prevention protrusion is preferably made of the same resin as the stem and the head portion.

When a plurality of engaging protrusions are present on both sides of the stem in the vertical direction, from the uppermost portion of the engaging element (E) to the lower end portion of the engaging protrusion (T) referred to in the present embodiment. The length (D) of is targeted at the engaging protrusion existing at the uppermost part.

As described above, the ratio (D / H) of the length (D) from the top of the engaging element (E) to the lower end of the engaging protrusion (T) with respect to the height (H) of the stem is within the above range. It is preferable in order to prevent unnecessary engagement from occurring during alignment.

Further, as a preferred embodiment, it is desirable that the substrate coverage of the engaging element is in the range of 30 to 45%. In the case of a conventionally known male molded surface fastener, a value of 30 to 45% can be said to be extremely high, considering that the substrate coverage of the engaging element is 15 to 22%. When the substrate coverage of the engaging element is less than 30%, engagement is likely to occur during alignment. On the other hand, if it exceeds 45%, strong engagement is unlikely to occur even after the final stop. More preferably, it is in the range of 27 to 42%, and even more preferably, it is in the range of 28 to 40%.

The substrate coverage of the engaging element in the present embodiment is the ratio of the area of the head portion of the male engaging element viewed from above to the area of the substrate portion on which the male engaging element is erected. Specifically, a photograph is taken from the upper surface of a portion where the male engaging elements are continuously present with an optical microscope, and an arbitrary substrate portion in which 50 male engaging elements are present is surrounded from the photograph. , The total area (s2) of the area (s1) of the enclosed portion and the area of the upper surface of the 50 male engaging element head portions existing in the same portion was obtained, and [(s2) / (s1)] × 100 The substrate coverage of the engaging element can be obtained by calculating.

Further, the height (H) of the male engaging element is preferably 1.3 to 3.0 mm, and if the height is less than 1.3 mm, a sufficient engaging force cannot be obtained. On the other hand, if it exceeds 3.0 mm, the male engaging element tends to fall down and is easily caught by the loop-shaped engaging element with a light force, which is not preferable. It is more preferably in the range of 1.5 to 2.7 mm, still more preferably in the range of 1.6 to 2.6 mm.

Further, the distance between the engaging projection of the male engaging element and the engaging projection of the male engaging element adjacent to each other in the same projection direction (that is, the X direction shown in the figure) is in the range of 0.6 to 2.5 mm. It is appropriate, and if it is narrower than 0.6 mm, sufficient engaging force cannot be obtained, and if it is wider than 2.5 mm, it is difficult to achieve the substrate coverage of the male engaging element described above. Become.

Further, in the present embodiment, the engaging protrusion preferably protrudes from the stem by 0.2 to 1.0 mm. That is, in the engaging elements shown in FIGS. 1 and 2, V is preferably 0.2 to 1.0 mm. If the protrusion is lower than 0.2 mm, a sufficient engaging force cannot be obtained, and if it exceeds 0.8 mm, the engagement becomes strong and the element or loop is damaged at the time of peeling. More preferably, it is 0.3 to 0.6 mm. The engaging protrusions are usually made of the same resin as the stem.

Further, the thickness of the male engaging element in the engaging element row direction (W shown in FIG. 2) is preferably in the range of 0.15 to 0.6 times the height (H) of the male engaging element. If it is less than 0.15 times, the strength of the male engaging element becomes low and sufficient engaging force cannot be obtained, and if it exceeds 0.6 times, it is difficult to engage with the loop-shaped engaging element. Therefore, sufficient engaging force cannot be obtained. More preferably, it is in the range of 0.18 to 0.5 times.

Further, as the thickness of the stem portion of the male engaging element, the cross-sectional area on the plane parallel to the substrate is 0. For the same reason as the thickness (W) of the engaging element in the engaging element row direction. The range of 3 to 0.9 mm ^{2 is preferable.}

The thickness of the substrate (B) is not particularly limited, but a range of 0.5 to 2.5 mm is appropriate. Further, as the engaging element density is preferably in the range of 5 to 30 pieces / cm ^2, especially 10 to 20 / cm ² is more preferable.

Next, a method for manufacturing such a male molded surface fastener will be described.

The method for manufacturing the surface fastener of the present embodiment is not particularly limited, but can be manufactured by, for example, an injection molding method. Specifically, it can be molded by flowing a molten resin liquid into a mold having a space having the same shape as the male molding surface fastener of the present embodiment and applying an appropriate pressure. Further, when the engaging element has a protrusion for preventing sticking, a resin plate having a large number of upright stems is manufactured on the surface of the substrate resin sheet, and only the tip of the stem is a heated metal having a recess for the protrusion for preventing sticking. It can also be manufactured by crimping it onto a plate and melting it to form a mushroom-shaped stem, and molding it so that the tip of the mushroom becomes a protrusion for preventing sticking, or a method of thickening the umbrella portion of the mushroom.

As described above, in the present invention, the engaging projection is easily warped and disengaged without breaking the loop-shaped engaging element when the engagement is disengaged, and as a result, the loop-shaped engaging element is provided. Provided is a male molded hook-and-loop fastener that can be disengaged without cutting. Further, the present invention has an advantage that the surface fasteners after engagement are less likely to be displaced from each other and can be firmly fixed at an accurate position.

As the female type surface fastener used in combination with such a male type surface fastener, a conventional general female type surface fastener can be used. As long as it is used in combination with the male molded surface fastener of the present invention, the above-mentioned effect is far superior to the combination of the male surface fastener and the female surface fastener which are generally used in the past.

The male hook-and-loop fastener of the present invention having the above-mentioned excellent advantages can be used for fixing the ceiling material to the ceiling base material of an automobile, especially in a production line flowing at a constant speed during the production of an automobile. In the work of fixing the surface material for the trunk room to the trunk room of an automobile, if the fixing position is wrong, it is necessary to temporarily remove the engagement and fix it again, which may damage the loop engaging element. It is necessary to take measures such as causing confusion in the production line or reducing the line speed. However, when the surface fastener for molding of the present invention is used, the alignment is facilitated, so that the occurrence of misalignment can be reduced. Is possible.

Further, in the interior work of a house or the like, if the male molded surface fastener of the present invention is used for the ceiling material or the wall material, it is possible to prevent the surface fastener from being damaged when the position is displaced or the position is displaced, which is laborious. It is possible to prevent damage to the ceiling material and wall material when removing the ceiling material and wall material that have been reduced or misaligned, and especially when the object to be attached has a large shape, the male molded surface fastener of the present invention. The effect of using is very large.

The male molded surface fastener of the present invention is extremely excellent as a fixing means when fixing an object having a large area in a predetermined position. For example, a sheet having an ^{area of 0.1 m 2} or more, particularly 0.2 m ^{2 or a sheet, or} It exerts a particularly excellent effect when a plate-shaped object is an object to be attached.

Further, the male molded surface fastener of the present invention is usually attached to an object or the back surface or the surface of a base material by adhesive or adhesive, fusion, sewing, hotchkiss or the like, while the female woven surface fastener is Similarly, it is attached to the back surface of the object or the surface of the base material by an adhesive or an adhesive, or by fusing, sewing, or velcro.

Further, in the present invention, the structure is a structure in which the ceiling material is fixed to the ceiling base material, the male hook-and-loop fastener is fixed to either the ceiling base material or the ceiling material, and the loop-shaped engaging element is fixed to the other. A ceiling structure is also included, wherein the female hook-and-loop fastener having the above-mentioned is fixed, and the ceiling material is attached to the ceiling base material by engaging the two.

As described above, the present specification discloses various aspects of technology, of which the main technologies are summarized below.

The male hook-and-loop fastener according to one aspect of the present invention has a large number of male engaging elements erected on the surface of a substrate made of resin, and the male engaging elements stand up from the resin substrate and the stem. A male hook-and-loop fastener having engaging protrusions protruding sideways from the stem, and the engaging protrusions extend in a direction away from the stem and form a plurality of small protrusions arranged in a direction orthogonal to the height direction of the stem. It is branched, and further, the plurality of branched small protrusions are parallel to each other.

With such a configuration, the engaging projection easily bends back and disengages without cutting the loop-shaped engaging element when the engagement is disengaged, and as a result, the loop-shaped engaging element is cut. The engagement can be disengaged without any need.

Further, in the male hook-and-loop fastener, the length (D) from the tip of the male engaging element to the lower end of the engaging protrusion with respect to the height (H) from the substrate to the tip of the male engaging element. ) Is preferably 0.30 to 0.60. With such a configuration, there is an advantage that strong engagement does not occur at the time of temporary fixing (that is, at the time of alignment), and strong engagement can be obtained after final fixing.

Further, in the male hook-and-loop fastener, it is preferable that the engaging protrusion is branched into a plurality of small protrusions from the base of the engaging protrusion at a portion of 1/5 to 1/2 of the protruding length of the engaging protrusion. .. It is considered that such a configuration makes it easier to create the engaging protrusions and further prevents the engaging protrusions from breaking.

Further, it is preferable that a wedge-shaped cut is present between the branched small protrusions. As a result, there is an advantage that the engaging protrusions are easily bent and the loop-shaped engaging element is not easily damaged when the engagement is disengaged.

Further, in the male hook-and-loop fastener, it is preferable that a wedge-shaped cut exists between the plurality of branched small protrusions. As a result, the engaging protrusions are more likely to bend, and there is an advantage that the loop-shaped engaging element is less likely to be damaged when the engagement is disengaged.

Further, it is preferable that the plurality of branched small protrusions are two or three small protrusions. This has the advantage that it is less likely to be misaligned and can be firmly fixed in the correct position.

Further, in the male hook-and-loop fastener, it is preferable that the male engaging element has a protrusion for preventing sticking protruding in a direction away from the substrate above the engaging projection. As a result, there is an advantage that the alignment can be facilitated and the occurrence of misalignment can be further reduced.

Further, in the male hook-and-loop fastener, the height of the male engaging element is preferably in the range of 1.3 to 3.0 mm. As a result, a sufficient engaging force can be obtained more reliably, and there is an advantage that the loop-shaped engaging element is less likely to be caught by a light force.

Further, in the male hook-and-loop fastener, the substrate coverage of the male engaging element is preferably 30 to 45%. As a result, a strong engagement does not occur at the time of temporary fixing (that is, at the time of alignment), and a strong engagement can be obtained after the final fixing, which is more reliable.

Further, in the male hook-and-loop fastener, it is preferable that the small protrusions become thinner toward the tip. As a result, there is an advantage that the flexibility is improved and the loop engaging element is less likely to be damaged.

Further, in the male hook-and-loop fastener, it is preferable that the cross-sectional shape of the small protrusion is rectangular, and the thickness and width become thinner toward the tip portion. It is considered that the above effect can be obtained more reliably.

Further, in the male hook-and-loop fastener, the male engaging elements are arranged in a row on the substrate, and the engaging protrusions of the male engaging elements project in the direction intersecting the row direction, but in the row direction. It is preferable that it does not protrude in the direction parallel to. This facilitates proper engagement with the loop engaging element.

Further, in the male hook-and-loop fastener, it is preferable that the resin forming the substrate of the male hook-and-loop fastener and the male engaging element is a polyamide-based resin. This has the advantage of being superior in strength, heat resistance and impact resistance.

Further, the ceiling structure according to another aspect of the present invention is a structure in which a ceiling material is fixed to a ceiling base material, and the male hook-and-loop fastener is fixed to either the ceiling base material or the ceiling material. On the other hand, a female hook-and-loop fastener having a loop-shaped engaging element is fixed, and the ceiling material is attached to the ceiling base material by engaging the two.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited thereto.

In the following Examples and Comparative Examples, female hook-and-loop fasteners (B9750Y, cross-engaged) manufactured by Kuraray Fastening Co., Ltd. were used as the female hook-and-loop fasteners unless otherwise specified.

(Example 1)
As a female hook-and-loop fastener, the tip of the engaging protrusion shown in FIG. 4 is branched into two small protrusions (D: 1.34 mm, H: 2.97 mm, width of the engaging protrusion in the Y direction: 1). Female hook-and-loop fasteners (top view showing a part of the hook-and-loop fastener) in which male hook-and-loop fasteners having .07 mm and height of the male hook-and-loop element (2.97 mm) are arranged as shown in FIG. 5 (top view showing a part of the hook-and-loop fastener). The substrate coverage of the male engaging element (28.5%) was formed by pouring a molten resin into a mold having a space having the same shape and applying pressure. As the resin, PA6 (Amilan, manufactured by Toray Industries, Inc.) was used. The molding conditions were a cylinder temperature of 230 to 260 ° C., an injection pressure of 50 Mpa, a holding pressure of 30 Mpa, a holding pressure time of 5 sec, and a mold temperature of 130 ° C.

In the obtained male molded hook-and-loop fastener, the distance between the engaging projection of the male engaging element and the engaging projection of the male engaging element adjacent to each other in the same projection direction (that is, the X direction shown in FIG. 2). Is 0.5 mm, the protruding length (V) of the engaging protrusion is 0.91 mm, the thickness of the male engaging element (W shown in FIG. 2) is 1.07 mm, and the thickness of the substrate (B) is 2. It was 38 mm and the engagement element density was 15.4 elements / cm ² .

(Example 2)
A female hook-and-loop fastener was produced in the same manner as in Example 1 except that the molten resin was changed to ABS (acrylonitrile-butadiene-styrene).

(Example 3)
A female hook-and-loop fastener was manufactured in the same manner as in Example 1 except that a mold having a thin D thickness of 0.80 mm was used, although the tip of the engaging protrusion was branched into two. The shape of the male engaging element is as shown in FIG. 6A. The left is a cross-sectional view and the right is a top view).

(Comparative Example 1)
A female hook-and-loop fastener was manufactured in the same manner as in Example 1 except that a mold in which the tip of the engaging protrusion was not branched was used (the shape of the male engaging element is as shown in FIG. 6B). Is).

(Comparative Example 2)
A female hook-and-loop fastener was manufactured in the same manner as in Example 1 except that a mold was used in which the tip of the engaging protrusion was not branched and the width of the engaging protrusion in the Y direction was 0.46 mm. The shape of the male engaging element is as shown in FIG. 6 (c)).

(Comparative Example 3)
The tip of the engaging protrusion is branched into two, but the cut is not wedge-shaped, and the mold is used in which each small protrusion extends in different directions by about 90 °, in the same manner as in Example 1. A female hook-and-loop fastener was manufactured (the shape of the male engaging element is as shown in FIG. 6D).

(Evaluation test 1)
[Gripping to BRKT]
The male hook-and-loop fastener and the loop hook-and-loop fastener were engaged with each other and cured for 24 hours in an atmosphere of 90 ° C. with a load of 2 kg applied in the direction perpendicular to the surface for evaluation. Those held for 24 hours without deformation of the male hook-and-loop fastener were evaluated as ◯, and those held for 24 hours with deformation of the male hook-and-loop fastener were evaluated as Δ.

[Strong face-to-face]
The female hook-and-loop fasteners obtained in Examples 1 and 2 and Comparative Examples 1 to 3 were ^{engaged with the above-mentioned female hook-and-loop fastener by 5.6 cm 2} and peeled off at a speed of 300 mm / min in the direction perpendicular to the plane. The maximum strength of time was measured. In addition, as for the surface strength after repeating 5 times, a strength of 98 N / pc or more is considered to pass.

[Creep test]
The creep heat resistance test was carried out by the Kuraray fastening method.

Kuraray Fastening Method: Male hook-and-loop fastener and loop hook-and-loop fastener are ^{engaged with each other by 5.6 cm 2 and} cured for 24 hours. ..

The above results are shown in Table 1.

(Discussion)
In Examples 1 and 2 in which the shape of the engaging protrusion satisfies the conditions of the present invention, both the surface straight strength and the creep test gave a passing level result.

In Example 2 formed by using a soft resin, the gripping force was slightly inferior.

On the other hand, in Comparative Example 1, since the tip of the engaging protrusion was not branched, the width of the protrusion became large and the loop became difficult to engage. As a result, both the straight surface strength and the creep test were considerably inferior.

Next, in Comparative Example 2 in which the tip of the engaging protrusion was not branched and the width of the protrusion was simply reduced, molding was very difficult by injection molding, and the stem was easily broken, and after repeating 5 times. The straightness of the face has decreased.

In Comparative Example 3 in which the small protrusions are open by about 90 °, the tips of the engaging protrusions of the male engaging elements lined up diagonally are close to each other, making it difficult for the loop to enter. Therefore, the results were inferior in both the straight surface strength and the creep test.

(Evaluation test 2)
[Workability (wrong attachment function) evaluation]
Workability was evaluated by placing the male hook-and-loop fasteners of Examples 1 to 3 and Comparative Examples 1 to 3 on the loop hook-and-loop fastener and sliding the male hook-and-loop fastener with a load of 100 g applied. Those that slid with a force of 200 g or less were evaluated as ◯, and those that slid with a force of 300 g or less were evaluated as Δ.

As a result, in Examples 1 and 2 and Comparative Examples 1 to 3 in which the D / H satisfies the range of 0.30 to 0.60, the result was ◯, but in Example 3 in which the D / H was less than 0.3. Since the male hook-and-loop fastener and the loop hook-and-loop fastener were engaged and did not slide, the workability was x.

B Board E Male engaging element S Stem T Engagement protrusion M Anti-sticking protrusion H Height of engaging element from the board D Length from the top of the engaging element to the lower end of the engaging protrusion W Male Thickness of mating element V Protruding length of engaging protrusion Y Engaging element row direction X Engaging element cut direction

Claims (11)

It has a large number of male engaging elements that stand on the surface of a substrate made of resin, and the male engaging elements are symmetrical to the stem rising from the resin substrate and both sides from the stem, and are parallel or parallel to the substrate. In a male molded hook-and-loop fastener having an engaging protrusion that protrudes in a direction in which the tip is lowered toward the substrate.
The male engaging elements are arranged in a row on the substrate, and the engaging protrusions of each male engaging element project in the direction intersecting the row direction but project in the direction parallel to the row direction. Zu,
The height of the male engaging element is in the range of 1.3 to 3.0 mm.
The engaging protrusions extend in the direction away from the stem and are branched into a plurality of small protrusions arranged in a direction orthogonal to the height direction of the stem, and the plurality of branched small protrusions are parallel to each other. A characteristic male hook-and-loop fastener. The ratio (D / H) of the length (D) from the tip of the male engaging element to the lower end of the engaging protrusion with respect to the height (H) from the substrate to the tip of the male engaging element. The male hook-and-loop fastener according to claim 1, which is 0.30 to 0.60. The male surface according to claim 1 or 2, wherein the engaging protrusion is branched into a plurality of small protrusions from the base of the engaging protrusion at a portion of 1/5 to 1/2 of the protruding length of the engaging protrusion. fastener. The male hook-and-loop fastener according to any one of claims 1 to 3, wherein a wedge-shaped cut exists between the plurality of branched small protrusions. The male hook-and-loop fastener according to any one of claims 1 to 4, wherein the plurality of branched small protrusions are two or three small protrusions. The male hook-and-loop fastener according to any one of claims 1 to 5, wherein the male engaging element has a non-sticking protrusion protruding in a direction away from the substrate above the engaging protrusion. The male hook-and-loop fastener according to any one of claims 1 to 6, wherein the substrate coverage of the male engaging element is 30 to 45%. The male hook-and-loop fastener according to any one of claims 1 to 7, wherein the small protrusion becomes thinner toward the tip. The male hook-and-loop fastener according to any one of claims 1 to 8, wherein the small protrusions become thinner and thinner toward the tip. The male hook-and-loop fastener according to any one of claims 1 to 9 , wherein the resin forming the substrate of the male hook-and-loop fastener and the male engaging element is a polyamide-based resin. A structure in which a ceiling material is fixed to a ceiling base material, and the male hook-and-loop fastener according to any one of claims 1 to 10 is fixed to either the ceiling base material or the ceiling material, and a loop is attached to the other. A ceiling structure in which a female hook-and-loop fastener having a shape engaging element is fixed, and the ceiling material is attached to the ceiling base material by engaging the two.

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