JP2013252453A - Method of manufacturing molded hook-and-loop fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing molded hook-and-loop fasteners (1, 2) capable of preventing intrusion of expandable plastic material into a region of engagement element formation and stably securing required bonding force by being stably and closely attached to a cavity face (77a) of a metal mold (77).SOLUTION: A method of manufacturing a molded hook-and-loop fastener includes: molding a substrate (10), barriers (20, 80), and an engagement element (30) by pushing molten resin toward a die wheel (71) having a cavity for molding, on a peripheral surface thereof, to mold the barriers (20, 80) and the engagement element (30); separating molded hook-and-loop fasteners (1, 2) from the peripheral surface of the die wheel (71); and crushing an upper end of the barriers (20, 80) of the separated molded hook-and-loop fasteners (1, 2) by a pressing roll and molding flat upper faces (26, 86) on the barriers (20, 80).

Description

  The present invention relates to a molded surface fastener in which a plurality of engaging elements are arranged on one surface of a flat substrate portion and molded and integrated into the foam at the same time as the molding of the foam. The present invention relates to a method for manufacturing a molded surface fastener capable of preventing a material from entering an engaging element forming region of a substrate portion.

  Seats for automobiles and trains, various sofas, office chairs, etc. have cushion bodies inside the skin. As this cushion body, a molded body made of a material called rock wool or the like, which is obtained by confounding rigid fibers such as insulators, hemp or thick synthetic fibers and hardened by rubber or the like, or a molded body made of various foamable resin materials ( Foam) is used.

  These cushion bodies have a curved surface having an uneven shape that satisfies ergonomics in order to maintain a sitting posture that does not get tired even when seated for a long time. When mass production of such a cushion body having a complicated surface shape is attempted efficiently in consideration of its cushioning properties, it is difficult to cope with the rock wool having many manufacturing processes.

  On the other hand, cushion bodies made of foamable resin are widely used because they can be manufactured in a single process and various shapes can be easily obtained. That is, the foam body made of foamable resin is molded into a desired shape simultaneously with foaming by pouring a foamable resin material such as foamed urethane resin into the mold.

  In addition, the surface of the cushion body formed in this manner is generally covered with various fiber fabrics and skin materials such as natural or synthetic leather. In order to adhere this skin material to the cushion body surface, the skin material is adsorbed along the cavity surface of the mold, and the foam body is poured into the mold to mold the cushion body. At the same time, either means for integrating the back surface of the skin material or means for forming the cushion body into a desired shape and then covering the surface of the obtained cushion body with the skin material is employed.

  When using the means for integrating at the time of molding described above, when setting the skin material along the inner surface of the mold, the suction material is adsorbed along the inner surface of the mold using the suction means. In order to be deformed according to the cushion body surface having such a complicated surface form, the skin material itself needs to be a material excellent in stretchability. However, there is a limit to the stretchability depending on the material, so if the surface form of the cushion body becomes complicated, a large number of wrinkles are likely to occur especially between the seating surface and the peripheral side surface. Efforts have been made.

  Further, according to this means, since the cushion body and the skin material are integrated on the entire surface, for example, when a strong force is applied in the direction in which the skin material is displaced on the surface of the cushion body during use, the skin material and the cushion body are In some cases, a shearing force acts on the surface of the cushion member, causing a portion of the cushion body to tear and peeling off the skin material. Furthermore, in order to eliminate the occurrence of wrinkles, the materials that can be used as the skin material are limited, and a slight movement between the skin material and the cushion body can be allowed so that no excessive force is applied between the skin material and the cushion body. Is preferred. For this reason, instead of using the means for integrating the skin material simultaneously with the formation of the cushion body, after the cushion body is formed into a predetermined shape, a means for covering the obtained cushion body with the skin material is often employed. It is coming.

When a skin material is put on a cushion body made of such a foamable resin material, a method using a molded surface fastener made of a thermoplastic resin is generally used. For example, first, a molded surface fastener having a plurality of engagement elements (male engagement elements) is set on a cavity surface of a mold for forming a cushion body. At this time, the molded surface fastener is placed and fixed on the projecting surface portion with the engaging element forming surface of the molded surface fastener facing the projecting surface portion of the mold bottom surface corresponding to the recessed surface of the cushion body.

  Next, a foamable resin material is poured into a mold in which a molded surface fastener is set, and the cushion body is foam-molded, so that the molded surface fastener is engaged with the concave surface of the cushion body simultaneously with the formation of the cushion body. It is embedded and integrated with the combined element exposed to the outside. It is important that the foaming resin material of the cushion body does not flow into the region where the engaging element of the molded surface fastener is formed during the foam molding.

  Then, the surface of the cushion body obtained by the above foam molding is covered with a skin material made of various materials such as a pile knitted fabric, natural leather, and rigid leather, which is previously formed into a bag shape according to the outer shape of the cushion body. . At this time, the female engaging element disposed on the back surface of the skin material is pressed against the engaging element forming surface of the molded surface fastener integrated with the cushion body, and the skin material is engaged along the recessed surface of the cushion body. By wearing it, the skin material is prevented from floating from the cushion body.

  In foam molding in which the molded surface fastener as described above is integrated with the cushion body, a technique for preventing the foamable resin material from entering the engaging element forming region of the molded surface fastener at the time of molding of the cushion body is disclosed in, for example, No. 2005-211198 (Patent Document 1), International Publication No. 2010/016122 Pamphlet (Patent Document 2), and US Pat. No. 6,720,059 (Patent Document 3).

  The molded surface fastener described in Patent Document 1 includes a flat plate-like base material portion, a first resin intrusion prevention wall portion disposed on left and right side edges along the length direction of the base material portion, A plurality of engagement elements disposed between the first resin intrusion prevention wall portions, and a plurality of engagement elements disposed in the width direction of the base material portion, and partitioning the engagement elements for each required region in the length direction of the base material portion. 2 resin intrusion prevention wall portion.

  In the molded surface fastener of Patent Document 1, three rows of vertical wall portions are arranged differently from each other on the first resin intrusion prevention wall portion, and between the three rows of vertical wall portions, In addition, divided vertical wall pieces having a small height are arranged. Further, the second resin intrusion prevention wall portion is integrally provided with an engagement element having an engagement head facing forward and backward in the length direction.

  According to such a molded surface fastener of Patent Document 1, the first resin intrusion prevention wall portion disposed long in the length direction of the base material portion and the second resin intrusion prevention material disposed in the width direction of the base material portion. The wall portion can prevent the foamed resin material from entering the engaging element forming region of the base material portion during foam molding of the cushion body.

  In particular, in Patent Document 1, the vertical wall portions of each row constituting the first resin intrusion prevention wall portion are intermittently arranged, and the vertical wall portions of adjacent rows are arranged in a positional relationship where they overlap each other in the width direction. ing. Thus, the gap between the vertical wall portions of the first resin intrusion prevention wall portion is formed in a zigzag shape while maintaining the flexibility of the molded surface fastener appropriately. 1 Even if an attempt is made to enter the engaging element formation region of the base material portion through the gap through the resin intrusion prevention wall portion, the intrusion of the foamed resin material occurs in the middle of the gap formed in the zigzag shape of the first resin intrusion prevention wall portion. Can be easily stopped. Further, in Patent Document 1, since the second resin intrusion prevention wall portion itself has an engaging element, the presence of the second resin intrusion prevention wall portion reduces the bonding force between the molded surface fastener and the skin material. Can be prevented.

On the other hand, the molded surface fastener described in Patent Document 2 includes a flat base material portion, a resin intrusion prevention wall portion disposed on left and right side edges along the length direction of the base material portion, A large number of engaging elements disposed between the resin intrusion prevention wall portions, and a linear magnetic body disposed along the length direction of the base material portion. Further, the left and right resin intrusion prevention wall portions are arranged at predetermined intervals along the length direction of the base material portion, and a pair of first and second magnetic body sandwiching portions sandwiching the linear magnetic body, The outer wall portion disposed outside the first and second magnetic body sandwiching portions and the surface of the base material portion are raised, and the linear magnetic body sandwiched between the first and second magnetic body sandwiching portions is supported from below. And a support portion.

  According to such a molded surface fastener of Patent Document 2, the linear magnetic body is sandwiched by the first and second magnetic body sandwiching portions and supported from below by the support portion. It can arrange | position in the front-end | tip part vicinity of the 1st and 2nd magnetic body clamping part away from the base material part. For this reason, for example, when the magnet is embedded in the surface fastener installation position of the mold, the linear magnetic body of the molded surface fastener is disposed in the vicinity of the front end portions of the first and second magnetic body clamping portions as described above. If so, the attracting force between the magnet of the mold and the linear magnetic body of the molded surface fastener becomes strong, so that the molded surface fastener can be firmly attracted and held on the mold. As a result, it is possible to prevent a gap from being formed between the molded surface fastener and the cavity surface of the mold, and to effectively prevent the foamed resin material from entering the engaging element forming region of the base material portion.

  In Patent Document 3, as a resin intrusion prevention wall portion disposed on the left and right side edge portions of a flat plate-like base material portion, various materials that prevent the foamed resin material from entering the engaging element forming region of the base material portion are disclosed. Various forms of prevention walls have been proposed.

JP 2005-211198 A International Publication No. 2010/016122 Pamphlet US Pat. No. 6,720,059

  For example, in order to obtain a seating posture that is considered to be most ergonomically suitable for a seat for an automobile seat, a moderately curved uneven surface is formed on the seat surface, and various cushion bodies are used for the seat. An uneven surface is formed. For this reason, for example, when a molded surface fastener as described in Patent Documents 1 to 3 is molded and integrated on the concave and convex surface of the cushion body, the molded surface fastener is mounted on the curved cavity surface in the mold. The cushion body is foam-molded after being fixed.

  In this case, in order to prevent the foamable resin material from entering the engaging element forming region of the molded surface fastener during molding of the cushion body, the molded surface fastener is arranged along the concave and convex shape of the cavity surface (surface fastener adsorption surface). It is necessary to adhere to the cavity surface in a curved state.

  However, in the conventional molded surface fastener as described in Patent Documents 1 to 3, the molded intrusion prevention wall portion is long along the length direction of the base material portion. Since the flexibility (flexibility) of the fastener is impaired, for example, when the curved shape (that is, the rate of change in the inclination of the curved surface) on the surface fastener adsorption surface of the mold increases, the entire molded surface fastener is attached to the mold. In some cases, it could not be brought into close contact with the surface fastener adsorbing surface and floated at the end in the length direction of the molded surface fastener.

Thus, when the molded surface fastener is lifted from the surface fastener adsorbing surface of the mold, the foamable resin material enters the gap between the mold and the molded surface fastener at the time of foam molding of the cushion body,
The foamable resin material enters the engaging element forming region of the molded surface fastener. As a result, since the engaging element of the molded surface fastener is covered with the foaming resin, a desired bonding force may not be obtained between the molded surface fastener molded and integrated with the cushion body and the skin material. It was.

  The present invention has been made in view of the above-described conventional problems, and its specific purpose is to stably adhere to the cavity surface even when the cavity surface of the foam molding die is greatly curved. A molded surface fastener capable of preventing the foamable resin material from entering the engaging element forming region and stably securing a desired bonding force with another member such as a skin material is manufactured. It is to provide a method.

  In order to achieve the above object, a method of manufacturing a molded surface fastener provided by the present invention is basically composed of a thermoplastic resin and has a flat plate shape having a first surface and a second surface opposite to the first surface. A plurality of members disposed between the base wall, the barrier wall provided on the first surface near the left edge and the right edge along the length direction of the base wall, and the left and right barrier walls A molding surface fastener integrated with the foam simultaneously with the molding of the foam, wherein the molding cavity for molding the barrier and the engagement element is provided. Extruding molten resin toward the die wheel provided on the surface, forming the base portion on the peripheral surface of the die wheel, and forming the barrier portion and the engaging element, and forming the base material Part, the barrier part and the engaging element. The surface fastener is peeled off from the peripheral surface of the die wheel, and the upper end portion of the barrier portion of the molded surface fastener that has been peeled off is crushed by a heated pressing roll, and the barrier portion is flat. The most important feature is to form the upper surface portion.

  In the method of manufacturing a molded surface fastener according to the present invention, when the molded surface fastener is molded on the peripheral surface of the die wheel, the height of the barrier is made larger than the height of the engaging element. It is preferable that it contains.

  Further, in the manufacturing method of the molded surface fastener of the present invention, the barrier portions each have two or more rows of vertical wall portions, and the vertical wall portions of each row are intermittently arranged in the length direction, Preferably, the method includes manufacturing the molded surface fastener having a plurality of vertical walls alternately arranged between the adjacent vertical wall portions.

  In this case, in the method of manufacturing the molded surface fastener of the present invention, the upper surface portion is stretched in the length direction and the width direction of the base material portion from the upper end of the column portion standing up from the base material portion in each vertical wall. It is particularly preferable to include the molding so as to protrude, and from the dimension in the length direction of the barrier part and the inner wall surface of the vertical wall part arranged closest to the engaging element of the barrier part. The total of the areas of the upper surfaces of all the vertical walls of the barrier wall, with respect to the barrier wall arrangement area determined by the product of the dimension to the outer wall of the vertical wall disposed on the outermost side, More preferably, it is set to 39% or more and 95% or less.

  Furthermore, the manufacturing method of the molded surface fastener of the present invention is for molding to mold a lateral wall portion disposed along the width direction inside the barrier portion of the molded surface fastener on the peripheral surface of the die wheel. A cavity is provided to form the lateral wall portion when molding the base material portion, and the upper end portion of the lateral wall portion of the molded surface fastener peeled off from the peripheral surface of the die wheel is heated. And crushing with the pressing roll to form a flat upper surface portion on the lateral wall portion.

Furthermore, in the method of manufacturing the molded surface fastener of the present invention, the engaging elements are arranged with a predetermined pitch in the width direction of the base material portion, between the barrier portion and the engaging elements, and Disposing a lateral wall portion between the engaging elements adjacent to each other in the width direction, and disposing the upper surface of the vertical wall portion and the upper surface of the lateral wall portion on the same plane. Is particularly preferred.

  In the manufacturing method of the molded surface fastener according to the present invention, the molten resin is extruded toward the die wheel provided with a molding cavity for molding the barrier portion and the engaging element on the peripheral surface, Molding the base material portion and the barrier portion and the engaging element, and then peeling the molded surface fastener including the molded base portion, the barrier portion and the engaging element from the peripheral surface of the die wheel, By integrally crushing the foam at the same time as forming the foam by crushing the upper end of the barrier wall of the molded surface fastener that has been peeled off with a heated pressing roll, and forming a flat upper surface on the barrier To produce molded surface fasteners.

  According to such a manufacturing method of the present invention, a molded surface fastener in which a flat upper surface portion is arranged on the upper end portion of the barrier wall portion can be stably manufactured. Further, since the molded surface fastener manufactured by such a manufacturing method of the present invention has a flat upper surface portion at the upper end portion of the barrier portion, when the molded surface fastener is brought into close contact with the cavity surface of the mold, The adhesion area of the molded surface fastener can be improved by increasing the adhesion area between the upper surface portion of each vertical wall arranged in the molded surface fastener and the cavity surface of the mold. Thereby, it is possible to prevent the foamable resin material from entering the engaging element forming region beyond the barrier portion of the molded surface fastener during foam molding of the foam.

  In addition, according to the manufacturing method of the present invention, by forming the molding cavity disposed on the peripheral surface of the die wheel into a predetermined shape, the flat base portion and the left and right side edges of the base portion are close to each other. Is connected to a vertical wall portion arranged on adjacent rows, a barrier wall portion having two or more rows of vertical wall portions, a plurality of engaging elements arranged between the left and right barrier portions. The vertical wall portions of each row are intermittently arranged in the length direction, and a plurality of vertical walls alternately arranged so as to be staggered between adjacent vertical wall portions. It is possible to produce a molded surface fastener having walls. Here, the phrase “vertical walls are alternately arranged” includes that the vertical walls are arranged in a staggered pattern or a zigzag pattern.

  In addition, between the vertical walls alternately arranged in the two vertical wall portions adjacent to each other, each vertical wall arranged in one row has two vertical walls arranged adjacent to the other row, and It is connected via a connecting part. In this case, each connection part has connected the one end part of the length direction of the vertical wall distribute | arranged to one of the adjacent row | line | columns, and the other end part of the length direction of the vertical wall distribute | arranged to the other.

  As described above, the vertical walls constituting the vertical wall portions of each row are connected to the two adjacent vertical walls arranged on the adjacent rows at the end portions in the length direction via the connecting portions. For example, even if the vertical wall portions of the adjacent rows are not arranged in a positional relationship so as to largely overlap each other in the width direction as in the molded surface fastener of Patent Document 1, for example, the foam is formed by the vertical wall portion and the connecting portion. It is possible to prevent the foamed resin material from entering the engaging element forming region during the foam molding. In the present invention, the engagement element forming region is a region where a plurality of engagement elements are formed on the first surface of the base material portion, and is a region surrounded by the left and right barrier portions. .

  As described above, in the present invention, since the region where the vertical walls arranged in the vertical wall portions of adjacent rows overlap each other can be reduced as much as possible, the flexibility (flexibility) of the molded surface fastener can be improved. For example, the fastener can be bent more easily in the vertical direction (height direction) along the length direction of the base material portion than in the past.

Therefore, for example, even when the cavity surface of a foam molding mold for molding a foam is greatly curved, the molded surface fastener of the present invention is curved in accordance with the curved shape of the cavity surface. Therefore, it is possible to prevent a gap from being generated between the barrier portion of the molded surface fastener and the cavity surface of the mold.

  As a result, in the molded surface fastener of the present invention, even when the cavity surface is greatly curved, the foamable resin material enters the engaging element forming region beyond the barrier portion of the molded surface fastener during foam molding of the foam. This can be reliably prevented, and the binding force (engagement force) inherent to the plurality of engagement elements formed on the molded surface fastener can be stably maintained.

  In the present invention, the one end portion and the other end portion in the length direction of the vertical wall portion are, for example, one vertical wall portion of the front end portion, the intermediate portion, and the rear end portion in the length direction of the molded surface fastener. When the three parts are equally divided into three parts so as to have an equal length dimension, they refer to the front end part and the rear end part in the vertical wall part.

  Therefore, between two adjacent vertical walls, the connecting portion has one end in the length direction of the vertical wall arranged in one row and the other end in the length direction of the vertical wall arranged in the other. Connecting the front end of the vertical wall arranged in one row and the rear end of the vertical wall arranged in the other, and the rear end of the vertical wall arranged in one row It means to connect the front end of the vertical wall arranged on the other side. Particularly in this case, the connecting portion includes a front end edge (or rear end edge) in the length direction of the vertical wall arranged in one row and a rear end edge in the length direction of the vertical wall arranged in the other row ( Or it is preferable to connect a front edge).

  Furthermore, in the present invention, one end portion in the length direction of the vertical wall disposed in the vertical wall portion of each row, and the other end portion in the length direction of the vertical wall disposed in the vertical wall portion of the adjacent row. It is preferable that the connection part to connect connects both the vertical walls with the shortest distance. That is, the connecting portion connects one end portion in the length direction of the vertical wall disposed in one of the adjacent rows and the other end portion in the length direction of the vertical wall disposed in the other row to the most of the vertical walls. By connecting at close positions, the influence of the connecting portion itself on the flexibility of the molded surface fastener can be reduced, and the flexibility of the molded surface fastener can be prevented from being impaired.

  Particularly in the present invention, the connecting part has the same height dimension as the height dimension from the base material part in the vertical wall, so that in the range of the height dimension in which the vertical wall is erected from the base material part, Since the outer side (outer side) of the barrier part and the inner side (inner side) where the engaging elements of the barrier part are arranged are completely divided by the vertical wall part and the connecting part, foaming of the foam It is possible to reliably prevent the foamed resin material from entering the engaging element forming region during molding.

  In such a manufacturing method of the present invention, when forming the molded surface fastener on the peripheral surface of the die wheel, the height dimension of the barrier portion is made larger than the height dimension of the engaging element. Contains. Thus, after forming the molded surface fastener and peeling off from the peripheral surface of the die wheel, the upper end of the barrier is pressed by a pressing roll, so that the upper end of the barrier is crushed and a flat upper surface Can be molded.

  Moreover, according to the manufacturing method of the present invention, the barrier portions each have two or more vertical wall portions, and the vertical wall portions of each row are intermittently arranged in the length direction and adjacent vertical walls. A molded surface fastener having a plurality of vertical walls arranged alternately between the parts can be manufactured.

  In this case, the manufacturing method of the present invention forms the upper surface portion so as to protrude in the length direction and the width direction of the base portion from the upper end of the column portion standing up from the base portion in each vertical wall. Contains. As a result, when the manufactured molded surface fastener is brought into close contact with the cavity surface of the mold, the contact area between the upper surface portion of each vertical wall arranged on the molded surface fastener and the cavity surface of the mold is increased, and molding is performed. The adhesion of the hook-and-loop fastener can be improved. For this reason, it can prevent more reliably that a foaming resin material penetrate | invades into an engagement element formation area beyond the barrier part of a molded surface fastener at the time of foam molding of a foam.

  In addition, the manufacturing method of the present invention includes the outer dimension of the outermost vertical wall portion arranged from the dimension in the length direction of the barrier portion and the inner wall surface of the vertical wall portion arranged closest to the engaging element of the barrier portion. This includes setting the total area of the upper surfaces of all the vertical walls of the barrier part to 39% or more and 95% or less with respect to the barrier part disposition area determined by the product of the dimensions up to the wall surface.

  Thus, when the molding surface fastener is brought into close contact with the cavity surface of the mold by setting the total area of the upper surfaces of all the vertical walls to 39% or more with respect to the barrier wall arrangement area of the molding surface fastener. In addition, since the adhesion when the molded surface fastener is brought into close contact with the cavity surface of the mold is increased, it is possible to effectively prevent the foamable resin material from entering the engaging element forming region during foam molding of the foam. Moreover, the flexibility of the molded surface fastener can be stably secured by setting the total area of the upper surfaces of all the vertical walls to 95% or less with respect to the area where the barrier wall portion of the molded surface fastener is disposed. .

  Furthermore, the manufacturing method of the present invention is provided with a molding cavity for molding a lateral wall portion arranged along the width direction inside the barrier portion of the molded surface fastener on the peripheral surface of the die wheel. Forming the horizontal wall portion when molding, and crushing the upper end portion of the horizontal wall portion of the molded surface fastener peeled off from the peripheral surface of the die wheel with a heated pressing roll, and forming a flat shape on the horizontal wall portion Forming an upper surface portion of the substrate. Thereby, when the manufactured molded surface fastener is adhered to the cavity surface of the mold, the adhesion of the molded surface fastener can be further improved.

  Furthermore, in the manufacturing method of the present invention, the engaging elements are arranged with a predetermined pitch in the width direction of the base material portion, the engaging elements are adjacent to each other between the barrier portion and the engaging element and in the width direction. It includes disposing a horizontal wall portion between them, and disposing the upper surface of the vertical wall portion and the upper surface of the horizontal wall portion on the same plane. Thus, when the produced molded surface fastener is brought into close contact with the cavity surface of the mold, the foamable resin material is removed from the end side in the length direction of the molded surface fastener (that is, the front end side and the rear end side). Intrusion between the left and right barrier portions can be prevented by the lateral wall portion and the engaging element.

  Particularly in this case, for example, even if the manufactured molded surface fastener is cut to a desired length in accordance with the size and shape of the mold, the lateral wall portion and the engaging element are arranged at predetermined intervals in the length direction. Since it stands upright, the invasion of the foamable resin material can be prevented at the position where the lateral wall portion and the engaging element are arranged. For this reason, it can prevent that the coupling force by the engaging element in a molded surface fastener falls.

It is a perspective view which shows the shaping | molding surface fastener which concerns on Example 1 of this invention. It is a front view of the molded surface fastener. It is the III-III sectional view taken on the line in FIG. It is the IV-IV sectional view taken on the line in FIG. It is sectional drawing of the V (a) -V (a) line-V (d) -V (d) line in FIG. It is explanatory drawing which illustrates a part of shaping | molding process of the shaping | molding surface fastener typically. In the molded surface fastener, it is sectional drawing which shows the state before the upper surface part of a vertical wall is formed. In the molded surface fastener, it is a perspective view which shows the state before the upper surface part of a vertical wall is formed. It is sectional drawing which shows the state in which the upper surface part of the vertical wall was formed in the molded surface fastener. It is a perspective view which shows the state in which the upper surface part of the vertical wall was formed in the molded surface fastener. It is explanatory drawing explaining the state which closely_contact | adheres a shaping | molding surface fastener to the cavity surface which has a curved surface of a metal mold | die. It is explanatory drawing explaining the state by which the foam was foam-molded within the metal mold | die. It is an enlarged view which expands and shows a part of molded surface fastener which concerns on Example 2 of this invention. In the molded surface fastener, it is sectional drawing which shows the state before the upper surface part of a vertical wall and a weft wall part is formed. FIG. 5 is a cross-sectional view showing a state in which upper surfaces of vertical walls and weft wall portions are formed in the molded surface fastener.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below, and various modifications are possible as long as they have substantially the same configuration as the present invention and have the same effects. Is possible.

  FIG. 1 is a perspective view showing a molded surface fastener according to the first embodiment, and FIG. 2 is a front view of the molded surface fastener. 3 to 5 are cross-sectional views of the molded surface fastener along the lines shown in FIG.

  In the following description, the length direction in the base material portion of the molded surface fastener is defined as the front-rear direction, and the width direction in the base material portion is defined as the left-right direction. Moreover, the front and back direction in the base material portion is defined as the vertical direction, and in particular, the direction on the side where the engagement element is arranged with respect to the base material portion is defined as the upper direction, and the direction on the opposite side is defined as the lower direction.

  The molded surface fastener 1 according to the first embodiment includes a flat plate-like base material portion 10, a barrier portion 20 provided on the upper surface (first surface) near the left and right side edges of the base material portion 10, and left and right barrier walls. A plurality of engaging elements 30 (male engaging elements) arranged between the parts 20, a magnetic body holding part 40 arranged inside the barrier part 20, and a horizontal wall part 50 arranged along the width direction. And a fin piece portion 60 extending in the width direction from the left and right side edges of the base material portion 10 toward the outside. In addition, the linear magnetic body 5 is integrally formed on the molded surface fastener 1 in a state where the linear magnetic body 5 is held by the magnetic body holding portion 40 along the length direction.

  The molded surface fastener 1 is formed by injection molding of a thermoplastic resin material. The material of the molded surface fastener 1 is polyamide resin, polyester resin, polypropylene resin, PVC resin, ABS resin, polyethylene resin, or the like. A thermoplastic resin material can be employed.

  The linear magnetic body 5 integrally formed with the molded surface fastener 1 has a circular cross section and is configured to be bent or bent. The linear magnetic body 5 is made of a material that is magnetically attracted or magnetically attracted, and is made of a material that is softer than the material of the base portion 10 of the molded surface fastener 1. It is desirable.

  In this case, as the material of the linear magnetic body 5 that is magnetically attracted, several monofilaments in which magnetic particles made of an alloy such as iron, cobalt, nickel, etc. are mixed into a synthetic resin, or several metal wires made of these alloys are used. A twisted metal twisted yarn or the like can be used. On the other hand, as a material of the linear magnetic body 5 to be magnetically attracted, a magnetized wire, specifically, a linear magnet made of metal, a linear rubber magnet magnetized by containing magnetic iron oxide in rubber, etc. Can be used. In the present invention, a thin tape-like magnetic body can be used instead of the linear magnetic body.

  The base material portion 10 in the first embodiment is formed with a reduced plate thickness so that the molded surface fastener 1 can be bent in the vertical direction. Further, a flat surface is formed on the upper surface side of the base material portion 10 between the engaging elements 30 arranged at a predetermined mounting pitch in the length direction. On the other hand, on the lower surface side of the base material portion 10, when the molded surface fastener 1 is integrally formed with a foam (cushion body) to be described later, the bonding area between the molded surface fastener 1 and the foam is increased to increase the fixing strength. For this reason, a plurality of concave groove portions 11 (or protrusions) parallel to the length direction are formed.

  The left and right barrier portions 20 according to the first embodiment are arranged at positions near the side edges slightly inside from the left and right side edges of the base material portion 10. In the present invention, the positions of the left and right barrier portions 20 are within a predetermined range from the left edge or right edge of the base material portion 10 toward the inside of the base material portion 10 (for example, the left edge or right side of the base material portion 10). If it is in the area | region of the side edge part formed in the range within 20% of the width dimension of the base material part 10 toward an inner side from an edge, it will not specifically limit.

  In addition, the left and right barrier portions 20 include three rows of vertical wall portions 21 arranged along the length direction, a connecting portion 22 that connects the vertical wall portions 21 arranged in adjacent rows, and the outermost wall portions 20. Reinforcing portions 23 arranged on the outer wall surface side of the arranged vertical wall portion 21 are provided. In the first embodiment, the vertical wall portion 21 in the row arranged closest to the engaging element 30 side of the barrier portion 20 is defined as the vertical wall portion 21a in the first row, and the vertical wall portion 21a in the first row is The vertical wall portion 21 in the row arranged on the outside is referred to as a vertical wall portion 21b in the second row, and the vertical wall portion 21 in the row arranged on the outermost side is referred to as a vertical wall portion 21c in the third row.

  In such a left and right barrier 20, each row of vertical walls 21 has a plurality of vertical walls 24 arranged intermittently with a predetermined mounting pitch in the length direction, and is adjacent in the length direction. A gap 28 is provided between the two vertical walls 24.

  In this case, the mounting pitch of the vertical walls 24 arranged in the vertical wall portions 21 of each row is set to ½ the mounting pitch in the length direction of the engagement elements 30 described later. In addition, the vertical walls 24 in the vertical wall portions 21a to 21c in the first row to the third row are arranged in a staggered pattern so as to have an alternate positional relationship between the columns, and in particular, the vertical walls 24 in the first row. Between the wall portion 21a and the second row of vertical wall portions 21b, and between the second row of vertical wall portions 21b and the third row of vertical wall portions 21c, the length is a half of the mounting pitch. Arranged in a shifted direction.

  In the present invention, the mounting pitch of the vertical walls arranged in the vertical wall portions of each row may be set to a size of 1/2 or less of the mounting pitch of the engaging elements. By setting the vertical wall mounting pitch in this way, the length of each vertical wall in the longitudinal direction can be shortened, and the vertical wall portion of each row is formed between the vertical walls for each mounting pitch of the engaging elements. Since two or more gaps can be provided, the flexibility of the molded surface fastener can be further improved.

  On the other hand, if the mounting pitch of the vertical walls becomes too small, the arrangement density of the connecting portions that connect between the vertical wall portions of adjacent rows may be excessively increased and the flexibility of the molded surface fastener may be impaired. The mounting pitch of the vertical wall portions arranged in the row is preferably set to a size equal to or larger than ¼ of the mounting pitch of the engaging elements.

  Each vertical wall 24 has a column part 25 standing up from the base material part 10 and an upper surface part 26 arranged on the upper end of the column part 25, and the vertical wall 24 from the base material part 10. The height dimension (the vertical dimension) is set to be the same as the height dimension of the engagement element 30 from the base material portion 10.

In the first embodiment, the column portion 25 of each vertical wall 24 is formed in a rectangular frustum shape elongated in the length direction, and the inner wall surface and the outer wall surface (left and right side wall surfaces) of the column portion 25 are parallel to each other. Arranged in a positional relationship. In addition, the front wall surface and the rear wall surface of the column part 25 are arranged so as to be inclined with respect to the vertical direction so that the dimension in the length direction of the column part 25 gradually decreases upward. When viewed from the side wall surface side, the column portion 25 has a substantially trapezoidal shape.

  The upper surface portion 26 of each vertical wall 24 is formed so as to protrude in the length direction and the width direction from the upper end of the column portion 25, and the upper surface of the upper surface portion 26 is formed flat. When the vertical wall 24 arranged in the vertical wall portion 21 of each row has such an upper surface portion 26, the molding surface fastener 1 is brought into close contact with the cavity surface 77a of the mold 77 as described later. (Refer to FIG. 11), the adhesion area of the molded surface fastener 1 can be improved by increasing the adhesion area between the vertical wall portion 21 (vertical wall 24) of the molded surface fastener 1 and the cavity surface 77a of the mold 77. it can.

  In this case, as shown in FIG. 2, the dimension in the length direction of the barrier portion 20 is a dimension α, and the position of the outer wall surface in the third row vertical wall portion 21c from the position of the inner wall surface in the first row vertical wall portion 21a. When the dimension up to the position is defined as the dimension β, all the vertical walls 24 disposed in the area where the barrier part 20 is disposed with respect to the barrier part disposed area represented by the product of the dimension α and the dimension β. The total area of the upper surface is set to 39% or more and 95% or less.

  That is, the total area of the upper surfaces of all the vertical walls 24 arranged in the area where the barrier 20 is provided is 39% or more, preferably 50% or more, with respect to the area where the molded surface fastener 1 is provided. As a result, the adhesiveness of the molded surface fastener 1 when the molded surface fastener 1 is brought into close contact with the cavity surface 77a of the mold 77 is increased, and the foamability of the foam (cushion body) is foamed as will be described later. It is possible to prevent the resin material from entering the formation region of the engagement element 30 (hereinafter referred to as the engagement element formation region).

  In addition, the total area of the upper surfaces of all the vertical walls 24 arranged in the area where the barrier part 20 is arranged is 95% or less, preferably 80% or less, with respect to the area where the molded surface fastener 1 is provided. Thus, it is possible to appropriately secure the size of the gap 28 formed between the vertical wall portions 21 of the barrier portion 20 and prevent the flexibility of the molded surface fastener 1 from being impaired.

  Furthermore, in the first embodiment, in the vertical wall portions 21a to 21c in the first row to the third row, the dimension in the length direction at the boundary portion 27 between the column portion 25 and the upper surface portion 26 of each vertical wall 24 is adjacent. In the vertical wall portion 21 of the row to be aligned, the length in the gap 28 between the boundary portions 27 of the two vertical walls 24 arranged adjacent to each other, or the length in the gap 28 in the length direction. Is set too small.

  That is, for example, when attention is paid to the vertical wall portion 21b in the second row (see FIG. 5C), the longitudinal dimension γ at the boundary portion 27 between the column portion 25 and the upper surface portion 26 of each vertical wall 24 is shown. Are two vertical walls adjacent to each other in the length direction in the first and third vertical wall portions 21a and 21c adjacent to the second vertical wall portion 21b (see FIG. 5D). It is set to be the same size as the dimension in the length direction in the gap 28 between the 24 boundary portions 27 or smaller than the dimension in the length direction in the gap 28.

  Since the vertical wall 24 is erected between the vertical wall portions 21 of the adjacent rows, the area of the portion where the vertical walls 24 arranged in the adjacent rows overlap in the width direction is reduced. Since the barrier part 20 can be configured by reducing the size, the flexibility of the molded surface fastener 1 can be further improved.

Further, the connecting portion 22 in the first embodiment includes a front end portion of the vertical wall 24 disposed on the vertical wall portion 21 of each row and a vertical wall 24 disposed on the vertical wall portion 21 of the row adjacent to the row. It arrange | positions so that a rear-end part may mutually be connected. That is, the connecting portion 22 of the first embodiment includes the front end portion of the vertical wall 24 disposed on the first and third rows of vertical wall portions 21c and the vertical wall 24 disposed on the second row of vertical wall portions 21b. Of the vertical wall 24 connected to the front end of the vertical wall 24 arranged on the second vertical wall portion 21b and the vertical wall 21c arranged on the first and third rows. The rear end is connected. In this case, each connecting portion 22 has a corner (front edge) on the front wall surface side of the vertical wall 24 arranged in each row and a corner on the rear wall surface side of the vertical wall 24 arranged in a row adjacent to the row. The parts (rear edges) are connected to each other.

  By having such a connecting portion 22, two vertical walls 24 arranged adjacent to each other in the vertical wall portion 21 of the adjacent row are connected to one vertical wall 24 (second state). The vertical walls 24 arranged in the vertical wall portions 21b of the row are two vertical walls 24 arranged in the vertical wall portion 21a of the first row and two vertical walls arranged in the vertical wall portion 21c of the third row. 24 is connected to the four vertical walls 24 in total because they are connected to each other through the connecting portion 22). In particular, the connecting portion 22 according to the first embodiment connects the front end portion of the vertical wall 24 arranged in one row and the rear end portion of the vertical wall 24 arranged in the other row at the closest position. Therefore, each vertical wall 24 is connected by the shortest distance by the connection part 22 and the vertical wall 24 distribute | arranged to the vertical wall part 21 of an adjacent row | line | column.

  Moreover, in the present Example 1, the height dimension from the base material part 10 in each connection part 22 is set to the same size as the height dimension from the base material part 10 of the vertical wall 24. In addition, the height dimension of the connection part 22 and the height dimension of the vertical wall 24 said here include the case where there exists some errors, for example, the height dimension of the connection part 22 When the molded surface fastener 1 is brought into close contact with the cavity surface 77a of the mold 77, the height of the vertical wall 24 and the vertical wall 24 are substantially the same. It is assumed that there is a case where a slight gap is formed so that the foamable resin material cannot pass therethrough.

  Since the connecting portion 22 is arranged on the barrier portion 20 as described above, the outside of the barrier portion 20 (that is, the foamed body is molded) within the height dimension in which the barrier portion 20 is erected. The region side) and the inner side where the engaging element 30 is disposed (that is, the engaging element forming region side) can be completely divided by the vertical wall portion 21 and the connecting portion 22. For this reason, when foaming a foam as will be described later, it is possible to reliably prevent the foamable resin material from entering the inner side from the outer side of the barrier unit 20 beyond the barrier unit 20.

  In this case, since each connection part 22 distribute | arranged to the barrier part 20 is formed long and thin, compared with the vertical wall part 21, for example, it is comprised easily. For this reason, when the molded surface fastener 1 is bent in the vertical direction along the length direction, the connecting portion 22 is elastically deformed to widen or narrow the gap 28 formed between the vertical walls 24, thereby forming the molding. The hook-and-loop fastener 1 can be easily bent or bent.

  In addition, although the connection part 22 in the present Example 1 is provided between two adjacent vertical walls 24 as described above, in the present invention, for example, each vertical wall has a length direction and a width direction. In the case where two adjacent vertical walls are directly integrated with each other, the connecting portion is a part of the vertical wall and adjacent to each other. You may be comprised by the part (area | region) connected with the vertical wall of a row | line | column.

  In the first embodiment, the plurality of engaging elements 30 are arranged in the length direction and the width direction so that a predetermined bonding force (engagement force) can be obtained with the skin material that covers the foam (cushion body). It is erected with a predetermined mounting pitch. In particular, the engaging elements 30 according to the first embodiment are arranged in a row at a predetermined mounting pitch in the length direction, and the rows of the engaging elements 30 are arranged in five rows in the width direction. A combined element formation region is formed.

Each engagement element 30 includes a rising portion 31 that rises vertically from the upper surface of the base material portion 10, and a hook-like engagement that extends while curving toward the front and rear in the length direction at the upper end of the rising portion 31. It has a head 32 and constitutes a so-called male engagement element. Furthermore, the height dimension from the base material part 10 of each engagement element 30 is set to the same size as the height dimension from the base material part 10 of the vertical wall 24 as described above. In the present invention, the shape, dimensions, mounting pitch, and the like of the engaging element 30 are not particularly limited and can be arbitrarily changed.

  In this case, the linear magnetic body 5 is disposed in the vicinity of the upper surface of the base material portion 10 along the row of the engagement elements 30 disposed closest to the left and right barrier portions 20, and the left and right linear shapes Each of the magnetic bodies 5 is held by a magnetic body holding unit 40. The magnetic body holding part 40 for holding the linear magnetic body 5 is erected on the upper surface of the base material part 10, and holds the linear magnetic body 5 from the left and right along the length direction; The second holding part 42 is disposed at the standing position of the engaging element 30 and reinforces the engaging element 30 and surrounds and holds the linear magnetic body 5.

  The horizontal wall portion 50 according to the first embodiment has a width between the vertical wall portion 21b in the second row of the barrier portion 20 and the engagement element 30 and between the engagement elements 30 adjacent to each other in the width direction. Arranged along the direction. Moreover, each horizontal wall part 50 is connected with the engaging element 30 and the lower end part (end part by the side of the base material part 10) distribute | arranged adjacently, Thereby, the horizontal wall part 50 and the engaging element 30 are connected. Are reinforced with each other.

  Furthermore, the height dimension from the base material part 10 of each horizontal wall part 50 is the height dimension from the base material part 10 of the vertical wall 24 and the connection part 22, and the height from the base material part 10 of the engaging element 30. It is set to the same size as the dimension. As described above, in the molded surface fastener 1 according to the first embodiment, the heights of the vertical wall 24, the connecting portion 22, the horizontal wall portion 50, and the engaging element 30 are all set to the same size. Are arranged on the same plane. For this reason, when foam molding of the foam is performed as will be described later, the foamable resin material is passed from the width direction beyond the vertical wall portion 21 by bringing the molding surface fastener 1 into close contact with the cavity surface 77a of the mold 77. Intrusion into the engagement element formation region can be prevented, and entry from the length direction beyond the lateral wall portion 50 and the engagement element 30 can also be prevented.

  In addition, although the horizontal wall part 50 and the engagement element 30 are connected by the lower end part as mentioned above, the upper end part is spaced apart by small intervals. Thus, even if the horizontal wall portion 50 and the engagement element 30 are separated from each other at the upper end portion, the distance between the separation portions is very small. The engagement element formation region does not enter from the gap between the portion 50 and the engagement element 30.

  The said fin piece part 60 in the present Example 1 is extended in the shape of a tongue piece toward the outer side from the right-and-left side edge of the base material part 10, The left side fin piece part 60 and the right side fin piece part 60 are These are arranged alternately with a predetermined mounting pitch in the length direction. Further, the upper surfaces of the left and right fin pieces 60 are arranged on the same plane as the upper surface of the base material portion 10, and the lower surface side of the fin pieces 60 is long like the lower surface side of the base material portion 10. A plurality of concave groove portions 11 (or protrusions) parallel to the vertical direction are formed. These left and right fin pieces 60 are portions embedded in the foam during foam molding of the foam, and are provided to firmly fix the molded surface fastener 1 to the foam.

  The molded surface fastener 1 according to the first embodiment having such a configuration can be manufactured using the manufacturing apparatus 70 shown in FIG. Here, the manufacturing method of the molded surface fastener 1 will be briefly described with reference to FIGS.

6 includes a die wheel 71 that is driven and rotated in one direction (counterclockwise in the drawing), and a continuous extrusion nozzle 72 of a molten resin that is disposed to face the peripheral surface of the die wheel 71. The pickup roll 73 disposed on the downstream side of the continuous extrusion nozzle 72 in the rotational direction of the die wheel 71 so as to face the peripheral surface of the die wheel 71 and the pair of upper and lower presses disposed further downstream of the pickup roll 73 A line (not shown) that is disposed upstream of the rolls 74 and 75 and the continuous extrusion nozzle 72 in the rotational direction of the die wheel 71 and introduces the linear magnetic body 5 between the opposed surfaces of the die wheel 71 and the continuous extrusion nozzle 72. And a magnetic substance supply unit.

  Formed on the peripheral surface of the die wheel 71 of the manufacturing apparatus 70 is a molding cavity 71a for molding the barrier part 20, the engaging element 30, the lateral wall part 50, and the magnetic body holding part 40 of the molded surface fastener 1. Has been. In this case, the molding cavities of the left and right barrier portions 20 are arranged on both side edge regions on the peripheral surface of the die wheel 71, and the center region of the peripheral surface between the molding cavities of the left and right barrier portions 20 is engaged. Molding cavities for the combined element 30, the lateral wall portion 50, and the magnetic body holding portion 40 are arranged.

Moreover, the die wheel 71 distribute | circulates a cooling fluid inside the die wheel 71, and is cooling the die wheel 71 by it. Further, a cooling liquid tank (not shown) is arranged below the die wheel 71 so as to immerse a part of the lower half of the die wheel 71.
The pair of upper and lower pressing rolls 74 and 75 each have a heating section (not shown) inside, and the upper pressing roll 74 and the lower pressing roll 75 are heated to a predetermined temperature by the heating section.

  When manufacturing the molding surface fastener 1 of the present Example 1 using the manufacturing apparatus 70 having the above configuration, first, the molten resin material is continuously directed from the continuous extrusion nozzle 72 toward the peripheral surface of the die wheel 71. And pushed out. At this time, the die wheel 71 is driven and rotated in one direction, and the molten resin extruded onto the peripheral surface of the die wheel 71 is formed in the base 28 of the molded surface fastener 1 in the gap 28 between the continuous extrusion nozzle 72 and the die wheel 71. At the same time as molding 10, the barrier part 20, the engaging element 30, the lateral wall part 50, and the magnetic body holding part 40 are sequentially molded in the respective molding cavities described above.

  At the same time as the molten resin material is extruded from the continuous extrusion nozzle 72, the linear magnetic body 5 is introduced from the linear magnetic body supply section to the molten resin extrusion position, and is integrally formed with the molded surface fastener 1. . In this case, since the linear magnetic body 5 is integrally formed with the molded surface fastener 1 with a part thereof exposed, the peripheral surface of the die wheel 71 includes two pieces in addition to the molding cavity described above. The guide groove of the linear magnetic body 5 is formed continuously in the circumferential direction of the die wheel 71.

  The molded surface fastener 1 molded on the peripheral surface of the die wheel 71 is supported by the peripheral surface of the die wheel 71 and solidified by being rotated halfway while being cooled, and then the peripheral surface of the die wheel 71 by the pickup roll 73. Is continuously peeled off.

  At this time, in the molded surface fastener 1 immediately after being peeled off from the peripheral surface of the die wheel 71 by the pickup roll 73, the upper surface portion 26 is formed on each vertical wall 24 of the barrier portion 20 as shown in FIGS. 7 and 8. However, the height dimension of the vertical wall 24 is formed in a state where it is larger than the height dimension of the connecting portion 22, the horizontal wall portion 50, and the engagement element 30. Further, the groove portion 11 is not yet formed on the lower surface side of the base material portion 10 and the fin piece portion 60 in the molded surface fastener 1 immediately after being peeled off, and the left and right fin piece portions 60 are shown in FIG. And as shown in FIG. 2, it is not formed alternately but is formed in the continuous strip | belt shape.

  Next, the molded surface fastener 1 peeled off from the peripheral surface of the die wheel 71 is conveyed toward the upper and lower pressing rolls 74 and 75 and is pressed by the pressing rolls 74 and 75 in the vertical direction.

At this time, as shown in FIGS. 9 and 10, the upper end portion of each vertical wall 24 is pressed by the upper pressing roll 74, so that the upper end portion of the vertical wall 24 becomes the length direction of the molded surface fastener 1 and The flat upper surface part 26 is formed by being crushed so as to expand in the width direction, and the height dimension of each vertical wall 24 is the height dimension of the coupling part 22, the lateral wall part 50, and the engagement element 30. Is matched to the same size. At the same time, the base portion 10 and the fin piece portion 60 of the molded surface fastener 1 are pressed by the lower pressing roll 75, so that the concave groove portion 11 is formed on the lower surface side of the base portion 10 and the fin piece portion 60. 1 is formed along the length direction.

  Thereafter, in the molded surface fastener 1 that has passed between the upper and lower pressing rolls 74 and 75, the left and right fin pieces 60 having a belt-like shape are partially cut away, whereby the tongue piece-like fin pieces 60 are long. It is alternately formed on the left and right along the vertical direction. By passing through the above processes, the molded surface fastener 1 of the present Example 1 which has a form as shown in FIG.1 and FIG.2 is manufactured.

  When the molded surface fastener 1 of the first embodiment thus obtained is molded and integrated into a cushion body (foam) (not shown) such as a seat for an automobile, for example, first, a long continuous molding is performed. The surface fastener 1 is cut to a required length, and the cut molded surface fastener 1 is placed on the cavity surface 77a of the molding die 77 for the cushion body (see FIG. 11).

  At this time, since the magnet 78 is embedded in the mold 77 corresponding to the position where the molded surface fastener 1 is placed, the surface on which the engaging element 30 is formed is formed on the molded surface fastener 1. By placing the mold 77 so as to face the cavity surface 77a, the linear magnetic body 5 integrated with the molded surface fastener 1 is attracted by the attractive force of the magnet 78, and the molded surface fastener 1 is molded into the mold. Adsorbed and fixed to the 77 cavity surface 77a.

  For example, when the molded surface fastener 1 is disposed in the recessed portion of the cushion body, the molded surface fastener 1 can be placed on the convex surface portion corresponding to the recessed portion of the cushion body in the cavity surface 77 a of the mold 77. Necessary. In this case, the molded surface fastener 1 of the first embodiment has a small area of overlapping portions of the vertical walls 21 in the width direction, and the connecting portion 22 that connects the vertical wall portions 21 can be elastically deformed. Excellent in flexibility (particularly excellent in flexibility to bend in the vertical direction).

  Further, in the molded surface fastener 1 of the first embodiment, the mounting pitch of the vertical walls 24 arranged in the vertical wall portions 21 of each row is 1 / of the mounting pitch in the length direction of the engaging element 30 as described above. Since the dimension in the length direction of each vertical wall 24 is set shorter than the conventional molded surface fastener 1 as described in Patent Documents 1 to 3, The reduction in flexibility of the molded surface fastener 1 due to the formation of the portion 21 can be minimized.

  Furthermore, in the molded surface fastener 1, the portion where the engaging element 30 of the base material portion 10 is not arranged is more easily bent than the portion where the engaging element 30 of the base material portion 10 is erected, By configuring the portion 10 of the portion 10 where the engagement element 30 is not arranged to be more easily bent, the flexibility of the molded surface fastener 1 can be increased.

  In this respect, in the molded surface fastener 1 of the first embodiment, the mounting pitch of the vertical walls 24 arranged in the vertical wall portions 21 of each row is set to be 1/2 of the mounting pitch in the length direction of the engaging element 30. Accordingly, the region between the vertical walls 24 of each row is formed in a region between the engagement elements 30 in the length direction of the base material portion 10 (that is, a portion where the engagement elements 30 of the base material portion 10 are not arranged). Two gaps 28 can be provided. Thereby, in the vertical wall portion 21 of each row, the gap 28 that can be expanded or narrowed when the molded surface fastener 1 is curved is a region where the engaging element 30 of the base material portion 10 is not disposed. Therefore, the molded surface fastener 1 can be configured to be more easily bent, and the flexibility of the molded surface fastener 1 is further enhanced.

That is, since the molded surface fastener 1 of Example 1 is extremely excellent in flexibility, when the molded surface fastener 1 is placed on the cavity surface 77a of the mold 77, the entire length of the molded surface fastener 1 is increased. As the linear magnetic body 5 arranged over the surface is attracted by magnetic force, the molded surface fastener 1 is attracted and fixed along the cavity surface 77a of the mold 77, and along the curved shape of the convex portion of the cavity surface 77a. The molded surface fastener 1 can be easily bent. Therefore, the upper surface or the upper end of the barrier wall 20, the lateral wall 50, and the engagement element 30 of the molded surface fastener 1 are securely attached to the convex surface portion of the cavity surface 77 a over the entire length direction of the molded surface fastener 1. The molded surface fastener 1 can be fixed to the cavity surface 77 a of the mold 77 in the state of being in close contact.

  Moreover, in the molded surface fastener 1 of the first embodiment, since the upper surface portion 26 of the vertical wall 24 is projected in the length direction and the width direction as described above, the area of the upper surface of the vertical wall portion 21 is increased. The barrier portion 20 of the molded surface fastener 1 can be more stably brought into close contact with the cavity surface 77 a of the mold 77.

  Then, as described above, the molding surface fastener 1 of the first embodiment is adsorbed and fixed at a predetermined position on the cavity surface 77 a of the mold 77, and then the foamable resin material is injected into the mold 77. As a result, the foamable resin material foams and flows to the back surface (lower surface) of the molded surface fastener 1, the barrier portion 20, and the periphery of the lateral wall portion 50 and spreads over the entire cavity of the mold 77, as shown in FIG. Further, foam molding of the cushion body (foam) 79 is performed.

  At this time, since the molded surface fastener 1 is positioned and fixed at a predetermined position by the attracting action of the magnet 78 of the mold 77, the position of the molded surface fastener 1 is moved by the flow of the foamable resin material and the foaming pressure. Absent. Further, even if the foamable resin material flowing in the cavity tries to enter the engagement element forming region from the left and right side edges of the molded surface fastener 1, for example, the vertical wall portion 21 and the connecting portion 22 of the molded surface fastener 1 are not molded. The vertical walls 24 that are in close contact with the 77 cavity surfaces 77a and that are arranged on the left and right barrier portions 20 are connected to the two adjacent vertical walls 24 and the connecting portions 22 that are arranged on the vertical wall portions 21 of adjacent rows. Therefore, it is possible to reliably prevent the foamable resin material from entering the engaging element forming region beyond the barrier portion 20.

  In particular, in the molded surface fastener 1 of the first embodiment, since the column portion 25 of each vertical wall 24 is formed in a trapezoidal shape as described above, the length of the gap 28 formed between the adjacent vertical walls 24 is long. The dimension in the vertical direction is gradually increased toward the upper surface portion 26. For this reason, for example, when the foamable resin material enters the gap 28 formed in the vertical wall portion 21c in the third row, the foamable resin material is directed from the base portion 10 side of the gap 28 toward the upper surface portion 26. (I.e., in the direction in which the lengthwise dimension of the gap 28 gradually increases). As a result, the action of pressing the upper surface portion 26 of the vertical wall 24 against the cavity surface 77a of the mold 77 by the flow of the foamable resin material works, and the barrier 20 is in close contact with the cavity surface 77a of the mold 77. Therefore, it is possible to more reliably prevent the foamable resin material from entering the engaging element forming region.

  On the other hand, when the foamable resin material flowing in the cavity tries to enter the region (engagement element forming region) between the left and right barrier portions 20 from the front and rear end portions of the molded surface fastener 1, for example, Although the foamable resin material invades the region from the front end portion or the rear end portion of the fastener 1 to the position where the horizontal wall portion 50 and the engaging element 30 are initially arranged, the horizontal wall portion 50 and the engaging element 30 are In the disposed position, the lateral wall portion 50 and the engaging element 30 are provided between the left and right barrier portions 20 in close contact with the cavity surface 77a of the mold 77. Intrusion into the engaging element formation region beyond the lateral wall portion 50 and the engaging element 30 can be prevented.

After that, the foamable resin material spreads into the cavity of the mold 77 and foams and solidifies to complete the foam molding, whereby the cushion body 79 in which the molded surface fastener 1 is molded and integrated at a required location can be obtained. . The cushion body 79 obtained in this way has the engaging force inherent to the engagement element 30 because the foam does not enter the engagement element formation region of the molded surface fastener 1 molded and integrated on the surface thereof. It can be secured stably.

  Accordingly, the surface of the obtained cushion body 79 is covered with a skin material, and the skin material is pressed toward the mounting position of the molded surface fastener 1 in the cushion body 79, so that the female engagement element on the back surface of the skin material is obtained. 30 can be reliably engaged with the engagement element 30 (male engagement element) of the molded surface fastener 1. Accordingly, the skin material can be attached accurately along the curved surface of the cushion body 79 without causing the skin material to float from the cushion body 79.

  In the molded surface fastener 1 according to Example 1 described above, the second row of vertical wall portions 21b and the engaging elements 30 are disposed between the engaging elements 30 adjacent to each other in the width direction. The horizontal wall part 50 is erected on the base material part 10 in a substantially rectangular parallelepiped shape, and the length and width dimensions of each horizontal wall part 50 are from the lower end part (end part on the base material part 10 side) to the upper end part. Has a certain size. However, in the present invention, the form of the horizontal wall portion 50 is not particularly limited. For example, the upper end portion of the horizontal wall portion 50 protrudes in the length direction and the width direction in the same manner as the vertical wall 24 having the upper surface portion 26. An upper surface portion can also be provided. As a result, the contact area between the lateral wall portion 50 of the molded surface fastener 1 and the cavity surface 77a of the mold 77 can be increased, and the adhesion of the molded surface fastener 1 can be further improved.

FIG. 13 is an enlarged view illustrating a part of the molded surface fastener according to the second embodiment.
The molded surface fastener 2 according to the second embodiment is basically the same as the molded surface fastener 1 according to the first embodiment except that the left and right barrier portions 80 and the lateral wall portions 90 are different in form. have. Accordingly, in the second embodiment, the same reference numerals are used for the members and parts similar to those described in the first embodiment, and the description thereof is omitted.

  The molded surface fastener 2 according to the second embodiment is disposed between the flat base member 10, the barrier unit 80 provided on the upper surface of the left and right side edges of the base member 10, and the left and right barrier units 80. The plurality of engaging elements 30, the magnetic body holding part 40 arranged on the inner side of the barrier part 80, the lateral wall part 90 arranged along the width direction, and outward from the left and right side edges of the base part 10 And a fin piece 60 extending in the width direction. In addition, the linear magnetic body 5 is integrally formed on the molded surface fastener 2 in a state where the linear magnetic body 5 is held by the magnetic body holding portion 40 along the length direction.

  The left and right barrier portions 80 in the second embodiment include two rows of vertical wall portions 81 arranged along the length direction, and a connecting portion 82 that connects between the vertical wall portions 81 arranged in adjacent rows, Reinforcing portions 83 disposed on the outer wall surface side of the second row of vertical wall portions 81b disposed on the outside are provided.

  In the second embodiment, the vertical wall portion 81 of each row has a plurality of vertical walls 84 that are intermittently arranged with a predetermined mounting pitch in the length direction, and two vertical walls that are adjacent in the length direction. A gap 88 is provided between the walls 84. In this case, the mounting pitch of the vertical walls 84 arranged in the vertical wall portions 81 of each row is set to a half of the mounting pitch in the length direction of the engaging element 30. Further, the vertical walls 84 are arranged in a staggered manner so as to have an alternate positional relationship between the vertical wall portions 81a and 81b in the first row and the second row, and in particular, the vertical wall portions 81a in the first row. And the vertical wall portion 81b in the second row are arranged so as to be shifted in the length direction by a size of 1/2 of the mounting pitch.

In addition, each vertical wall 84 is disposed on the column portion 85 standing from the base material portion 10 and the upper end of the column portion 85,
And the height dimension from the base material part 10 of each vertical wall 84 is the height from the base material part 10 of the engaging element 30. The size is set to the same size. In this case, in the barrier portion 80 according to the second embodiment, as in the first embodiment, the arrangement of the barrier portion 80 with respect to the barrier portion arrangement area represented by the product of the dimension α and the dimension β. The total area of the upper surfaces of all the vertical walls 84 arranged in the region is set to 39% or more and 95% or less.

  The connecting portion 82 that connects the vertical wall portions 81 of adjacent rows is arranged at the front end portion of the vertical wall 84 arranged on the vertical wall portion 81 of each row and the vertical wall portion 81 of the row adjacent to the row. The rear end of the vertical wall 84 is connected at the closest position. In this case, the height dimension from the base material part 10 in each connection part 82 is set to the same size as the height dimension from the base material part 10 of the vertical wall 84.

  In the second embodiment, the horizontal wall 90 is formed between the vertical wall 81b in the second row in the barrier 80 and the engagement element 30, and between the engagement elements 30 adjacent to each other in the width direction. It is arranged along. Moreover, each horizontal wall part 90 is connected with the engagement element 30 in the lower end part, and the horizontal wall part 90 and the engagement element 30 are reinforced mutually.

  Further, the horizontal wall portion 90 of the second embodiment includes a column portion 91 that stands up from the base material portion 10 and an upper surface portion 92 that is arranged at the upper end of the column portion 91 and that protrudes in the length direction and the width direction. The height dimension from the base material part 10 of each horizontal wall part 90 has the height dimension from the base material part 10 of the vertical wall 84, and the height dimension from the base material part 10 of the engagement element 30. Is set to the same size.

  In this case, the column part 91 of each horizontal wall part 90 is formed in the substantially rectangular parallelepiped shape. Further, the upper surface portion 92 of each horizontal wall portion 90 is formed so as to protrude in the length direction and the width direction from the upper end of the column portion 91, and the upper surface of the upper surface portion 92 is formed flat. Since each lateral wall portion 90 has such an upper surface portion 92, when the molded surface fastener 2 is brought into close contact with the cavity surface 77a of the mold 77, the adhesion of the molded surface fastener 2 can be further improved. it can.

  The molded surface fastener 2 according to the second embodiment can be manufactured using the manufacturing apparatus 70 shown in FIG. 6 as in the first embodiment. The shape of the molding cavity formed on the surface is different from that of the first embodiment.

  For this reason, in manufacturing the molded surface fastener 2 of the second embodiment, the molten resin material is continuously extruded from the continuous extrusion nozzle 72 toward the peripheral surface of the die wheel 71, and the resin material is formed on the peripheral surface of the die wheel 71. After cooling and solidifying, the molded surface fastener 2 can be peeled off from the peripheral surface of the die wheel 71 by the pickup roll 73.

  At this time, as shown in FIG. 14, the molded surface fastener 2 peeled off by the pick-up roll 73 does not have the upper surface portions 86 and 92 formed on the vertical wall 84 and the horizontal wall portion 90, but the vertical wall 84 and the horizontal wall portion. 90 is formed in a state where the height dimension is larger than the height dimension of the connecting portion 82 and the engagement element 30.

Then, the molded surface fastener 2 peeled off from the peripheral surface of the die wheel 71 by the pickup roll 73 is then introduced between the upper and lower pressing rolls 74 and 75, and the upper end portions of the vertical wall 84 and the horizontal wall portion 90 are the upper portion. It is pressed by the pressing roll 74. Accordingly, as shown in FIG. 15, the upper end portions of the vertical wall 84 and the horizontal wall portion 90 are expanded in the length direction and the width direction of the molded surface fastener 2, and a flat upper surface portion is formed on the vertical wall 84 and the horizontal wall portion 90. 86 and 92 are formed, and the height dimension of the vertical wall 84 and the horizontal wall part 90 is adjusted to the same size as the height dimension of the coupling part 82 and the engagement element 30. Further, when the molded surface fastener 2 is pressed by the lower pressing roll 75, the recessed groove portion 11 is formed along the length direction of the molded surface fastener 2 on the lower surface side of the base material portion 10 and the fin piece portion 60. The

  Thereafter, the molded surface fastener 2 that has passed between the upper and lower pressing rolls 74 and 75 has a form as shown in FIG. 13 by partially cutting off the left and right fin pieces 60 having a belt-like form. The molded surface fastener 2 of Example 2 is obtained.

  The molded surface fastener 2 of the present Example 2 obtained in this way is less flexible than the molded surface fastener 2 of Example 1 described above because the number of columns of the vertical wall portions 81 arranged on the barrier wall portion 80 is smaller. And the two rows of vertical wall portions 81 arranged on the left and right barrier portions 80 are connected to each other via a connecting portion 82 having the same height as the vertical wall 84. It is possible to reliably prevent the foamable resin material from entering the engagement element forming region beyond the barrier portion 80 during foam molding of the cushion body. Therefore, the molded surface fastener 2 that is molded and integrated with the cushion body after foam molding can stably secure the engaging force that the engaging element 30 originally has.

DESCRIPTION OF SYMBOLS 1 Molding surface fastener 2 Molding surface fastener 5 Linear magnetic body 10 Base material part 11 Groove part 20 Barrier part 21 Vertical wall part 21a First row vertical wall part 21b Second row vertical wall part 21c Third row vertical wall Part 22 Connection part 23 Reinforcement part 24 Vertical wall 25 Column part 26 Upper surface part 27 Boundary part 28 Gap 30 Engaging element 31 Rising part 32 Engaging head part 40 Magnetic body holding part 41 First holding part 42 Second holding part 50 Horizontal wall Part 60 Fin piece part 70 Manufacturing apparatus 71 Die wheel 71a Molding cavity 72 Continuous extrusion nozzle 73 Pickup roll 74 Upper pressing roll 75 Lower pressing roll 77 Mold 77a Cavity surface 78 Magnet 79 Cushion body (foam)
DESCRIPTION OF SYMBOLS 80 Barrier part 81 Vertical wall part 81a 1st row vertical wall part 81b 2nd row vertical wall part 82 Connection part 83 Reinforcement part 84 Vertical wall 85 Column part 86 Upper surface part 88 Gap 90 Horizontal wall part 91 Column part 92 Upper surface part

Claims (7)

A plate-like base material portion (10) made of a thermoplastic resin and having a first surface and a second surface opposite to the first surface, and a left side edge and a right side edge along the length direction of the base material portion (10) A barrier (20, 80) erected on the first surface closer to each other, and a plurality of engaging elements (30) disposed between the left and right barriers (20, 80), and a foam ( 79) a manufacturing method for manufacturing a molded surface fastener (1, 2) that is integrated into the foam (79) simultaneously with the molding of
Extruding molten resin toward a die wheel (71) having a molding cavity for molding the barrier portion (20, 80) and the engagement element (30) on the peripheral surface, the die wheel (71) Forming the base part (10) and the barrier part (20, 80) and the engagement element (30) on the peripheral surface of
The molded surface fastener (1, 2) including the molded base material portion (10), the barrier portion (20, 80), and the engagement element (30) is pulled from the peripheral surface of the die wheel (71). Peeling, and
The upper end portion of the barrier portion (20, 80) of the molded surface fastener (1, 2) that has been peeled off is crushed by a heated pressing roll, and a flat upper surface is formed on the barrier portion (20, 80). Molding part (26,86),
A method for producing a molded surface fastener, comprising:   When forming the molded surface fastener (1, 2) on the peripheral surface of the die wheel (71), the height dimension of the barrier part (20, 80) is the height dimension of the engagement element (30). The manufacturing method of the molded surface fastener of Claim 1 including making larger than this.   The barrier portions (20, 80) each have two or more rows of vertical wall portions (21, 81), and the vertical wall portions (21, 81) of each row are intermittently arranged in the length direction. And manufacturing the molded surface fastener (1, 2) having a plurality of vertical walls (24, 84) arranged alternately between the adjacent vertical wall portions (21, 81). Item 3. A method for producing a molded surface fastener according to Item 1 or 2.   The upper surface portion (26, 86) is longer than the upper end of the column portion (25, 85) standing up from the substrate portion (10) in each vertical wall (24, 84). The method for producing a molded surface fastener according to claim 3, comprising molding so as to project in the length direction and the width direction.   The lengthwise dimension of the barrier part (20, 80) and the inner wall surface of the vertical wall part (21, 81) arranged closest to the engagement element (30) of the barrier part (20, 80) To the outer wall surface area of the vertical wall portion (21, 81) arranged on the outermost side, and the barrier wall portion (20, 80) has all The method for manufacturing a molded surface fastener according to claim 3 or 4, further comprising setting the total area of the upper surfaces of the vertical walls (24,84) to 39% or more and 95% or less. A molding cavity for molding, on the peripheral surface of the die wheel (71), a lateral wall portion (90) disposed along the width direction on the inner side of the barrier portion (80) in the molded surface fastener (2). Forming the lateral wall portion (90) when forming the base material portion (10), and
The upper end portion of the lateral wall portion (90) of the molded surface fastener (1, 2) peeled off from the peripheral surface of the die wheel (71) is crushed by the heated pressing roll, and the lateral wall portion ( 90) forming a flat upper surface portion (92),
The manufacturing method of the molded surface fastener in any one of Claims 1-5 which comprise these. Disposing the engagement elements (30) with a predetermined pitch in the width direction of the base material portion (10);
A lateral wall portion (50, 90) is disposed between the barrier portion (20, 80) and the engagement element (30) and between the engagement elements (30) adjacent to each other in the width direction; as well as,
Disposing the upper surface of the vertical wall portion (21, 81) and the upper surface of the horizontal wall portion (50, 90) on the same plane;
A method for producing a molded surface fastener according to any one of claims 1 to 6.

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