JP7502236B2 - Structure and method for joining objects to be joined to resin foam - Google Patents
Structure and method for joining objects to be joined to resin foam Download PDFInfo
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- JP7502236B2 JP7502236B2 JP2021112108A JP2021112108A JP7502236B2 JP 7502236 B2 JP7502236 B2 JP 7502236B2 JP 2021112108 A JP2021112108 A JP 2021112108A JP 2021112108 A JP2021112108 A JP 2021112108A JP 7502236 B2 JP7502236 B2 JP 7502236B2
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- 229920005989 resin Polymers 0.000 title claims description 116
- 239000011347 resin Substances 0.000 title claims description 116
- 239000006260 foam Substances 0.000 title claims description 111
- 238000005304 joining Methods 0.000 title claims description 42
- 238000000034 method Methods 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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- Finishing Walls (AREA)
- Floor Finish (AREA)
- Connection Of Plates (AREA)
- Laminated Bodies (AREA)
Description
本発明は、樹脂発泡体の表面に接合対象物が接合された接続構造及びその接続方法に関するものである。 The present invention relates to a connection structure in which an object to be joined is joined to the surface of a resin foam, and a connection method thereof.
従来、樹脂発泡体は、柔軟性や軽量性を活かして、例えば、緩衝材、建材、断熱材、消音材等各種産業用品等の素材として使用されている。また、さらに、樹脂発泡体を、災害用マット材や、パーテーション材又は壁面パネル材等の利用方法が提案されている（特許文献）１。 Conventionally, resin foams have been used as materials for various industrial products, such as cushioning materials, building materials, heat insulation materials, and sound-absorbing materials, taking advantage of their flexibility and light weight. Furthermore, methods of using resin foams as disaster mat materials, partition materials, wall panel materials, etc. have been proposed (Patent Document 1).
図８は、特許文献１で開示されている、樹脂発泡体１００を床材やパーテーション材として利用した災害時等における避難所区画を示す図である。樹脂発泡体１００からなるクッション材は、一方の面に、山部および谷部が周期的に形成される。このようにすることで、所定の厚みを確保することができるとともに、保管時には、山部と谷部とを重ね合わせることができるため、コンパクトに保管することができる。なお、樹脂発泡体１００としては、所定以上の厚みを有すれば、両面が平坦であってもよい。 Figure 8 is a diagram showing an evacuation shelter section in the event of a disaster, in which resin foam 100 is used as a flooring or partition material, as disclosed in Patent Document 1. The cushioning material made of resin foam 100 has peaks and valleys periodically formed on one side. This ensures a predetermined thickness, and since the peaks and valleys can be overlapped during storage, it can be stored compactly. Note that resin foam 100 may have flat surfaces on both sides as long as it has a predetermined thickness or more.
このような避難所区画を組み立てる際には、複数の樹脂発泡体１００同士を連結する必要がある。例えば、特許文献１では、面ファスナによって、樹脂発泡体１００同士を接続する方法が提案されている。 When assembling such an evacuation shelter section, it is necessary to connect multiple resin foam bodies 100 together. For example, Patent Document 1 proposes a method of connecting resin foam bodies 100 together using hook-and-loop fasteners.
図９は、図８のＸ部の拡大図であり、樹脂発泡体１００ａと樹脂発泡体１００ｂとを連結した状態を示す図である。一方の樹脂発泡体１００ａの端部近傍の背面側には、面ファスナ１０１ｂが配置される。また、他方の樹脂発泡体１００ｂの一方の側端面には、面ファスナ１０１ｂが配置される。このようにすることで、樹脂発泡体１００同士（１００ａ、１００ｂ）を例えばコの字状に連結することができる。 Figure 9 is an enlarged view of part X in Figure 8, and shows the state in which resin foam 100a and resin foam 100b are connected. A hook-and-loop fastener 101b is arranged on the back side near the end of one of the resin foams 100a. Also, a hook-and-loop fastener 101b is arranged on one side end face of the other resin foam 100b. In this way, the resin foams 100 (100a, 100b) can be connected to each other, for example, in a U-shape.
また、面ファスナ１０１ｂを樹脂発泡体１００ａの側端面にも配置しておけば、樹脂発泡体１００ａ、１００ｂを一列に連結することもできる。さらに、両側端面に面ファスナ１０１ａ、１０１ｂを配置しておけば、複数の樹脂発泡体を積層した状態で、他のテープ状の面ファスナ等によって固定することもできる。 If hook-and-loop fasteners 101b are also placed on the side end surfaces of resin foam 100a, resin foams 100a and 100b can be connected in a row. Furthermore, if hook-and-loop fasteners 101a and 101b are placed on both end surfaces, multiple resin foams can be stacked and then secured together with other tape-like hook-and-loop fasteners, etc.
このように、面ファスナを使用することで、避難所区画を組み立てる際には、自由に樹脂発泡体同士を連結することができるとともに、使用後は、容易に樹脂発泡体同士をばらすことができる。また、面ファスナによって、例えば積層させた状態の樹脂発泡体を接合することで、安定して樹脂発泡体を保管することもできる。 In this way, by using hook-and-loop fasteners, resin foam pieces can be freely connected together when assembling the evacuation shelter section, and can be easily disassembled after use. In addition, by using hook-and-loop fasteners to join resin foam pieces that are, for example, stacked, the resin foam pieces can be stored stably.
このように、樹脂発泡体に面ファスナのような部材を固定する方法としては、例えば、両面テープを用いる方法がある。しかし、樹脂発泡体の表面は凹凸があるため剥がれやすい。このため、面ファスナ同士を接合した後に剥がす際、面ファスナ同士が剥がれずに、両面テープが剥がれてしまうことがある。 As such, one method of fixing components such as hook-and-loop fasteners to resin foam is to use, for example, double-sided tape. However, because the surface of the resin foam is uneven, it is prone to peeling off. For this reason, when the hook-and-loop fasteners are joined together and then peeled off, the double-sided tape may peel off instead of the hook-and-loop fasteners.
本発明は、このような問題に鑑みてなされたもので、クッション材等の樹脂発泡体に対して、接合対象物を容易に接合することが可能な樹脂発泡体への接合対象物の接合構造等を提供することを目的とする。 The present invention was made in consideration of these problems, and aims to provide a structure for joining objects to resin foam, etc., that allows objects to be easily joined to resin foam such as cushioning material.
前述した目的を達するために第１の発明は、樹脂発泡体への接合対象物の接合構造であって、前記樹脂発泡体の表面に接合対象物が設置され、前記接合対象物を貫通する固定部材によって、前記接合対象物が前記樹脂発泡体へ固定されており、前記固定部材は、ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、前記ねじの最大外径が、前記頭部の外径以上であり、前記軸部の他方の端部近傍には、前記ねじが形成されず、かつ、軸方向に略垂直な断面が縮径されている縮径部が形成されており、当該縮径部の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面となっていて、前記ねじが形成されている範囲の前記軸部には径が同一の部分が存在し、径が同一の部分の径よりも前記縮径部の径が小さいことを特徴とする樹脂発泡体への接合対象物の接合構造である。 In order to achieve the above-mentioned object , the first invention is a joining structure for an object to be joined to a resin foam, the object to be joined is placed on the surface of the resin foam, and the object to be joined is fixed to the resin foam by a fixing member that penetrates the object to be joined, the fixing member having a shank portion with a thread formed thereon and a head formed at one end of the shank portion, the maximum outer diameter of the thread is equal to or greater than the outer diameter of the head, a reduced diameter portion is formed near the other end of the shank portion where the thread is not formed and where a cross section approximately perpendicular to the axial direction is reduced in diameter, the end of the reduced diameter portion has a shape of a plane or curved surface approximately perpendicular to the axial direction of the shank portion, there is a portion of the shank portion with the same diameter in the range where the thread is formed, and the diameter of the reduced diameter portion is smaller than the diameter of the portion with the same diameter.
第１の発明において、前記縮径部は、少なくとも一方の方向に対して縮径した偏平形状となっていてもよい。 In the first aspect of the present invention, the reduced diameter portion may have a flattened shape reduced in diameter in at least one direction.
第１の発明において、前記軸部の、径が同一となっている部分に形成されたねじの外径が全て等しくてもよい。 In the first invention, the outer diameters of the threads formed in the portion of the shaft portion having the same diameter may all be equal.
前記接合対象物が配置される前記樹脂発泡体の表面は、スキン層が形成されておらず、気泡が露出していてもよい。 The surface of the resin foam on which the object to be joined is placed may not have a skin layer formed, and the air bubbles may be exposed.
前記ねじの外径が、前記頭部側から先端部に行くにつれて、徐々に小さくなってもよい。 The outer diameter of the screw may become gradually smaller from the head to the tip.
第１の発明によれば、ねじが形成された固定部材を用いて接合対象物を樹脂発泡体に固定するため、接合対象物が樹脂発泡体から剥がれることを抑制することができる。この際、一般的なねじ部材と異なり、頭部の径と略同等の径のねじによって、柔軟な樹脂発泡体に対しても、より確実にねじを食い込ませて固定することができるため、固定部材の抜けを抑制することができる。 According to the first aspect of the present invention, since the joining objects are fixed to the resin foam using a fixing member having a thread, it is possible to prevent the joining objects from peeling off from the resin foam. In this case, unlike a general screw member, the screw having a diameter approximately equal to the diameter of the head can be more reliably inserted into and fixed to the flexible resin foam, thereby preventing the fixing member from coming off.
また、軸部の他方の端部の形態が、軸部の軸方向に略垂直な平面又は曲面で形成されていれば、先端がとがっていないため、樹脂発泡体が潰れてしまっても、固定部材の先端が樹脂発泡体の外面につきだしにくく、また、仮に突き出しても、尖っていないためより安全である。 In addition, if the other end of the shaft is formed with a flat or curved surface that is approximately perpendicular to the axial direction of the shaft, the tip is not sharp, so even if the resin foam is crushed, the tip of the fixing member is unlikely to protrude from the outer surface of the resin foam, and even if it does protrude, it is safer because it is not sharp.
また、軸部の他方の端部近傍にねじを形成せず、先端部近傍の軸方向に略垂直な断面を縮径させることで、樹脂発泡体へのねじ込みが容易である。 In addition, by not forming a thread near the other end of the shaft and reducing the diameter of the cross section approximately perpendicular to the axial direction near the tip, it is easy to screw into the resin foam.
この際、接合対象物が配置される前記樹脂発泡体の表面には、スキン層が形成されておらず、気泡が露出しているようにすることで、固定部材をより容易に樹脂発泡体へねじ込むことが容易である。 In this case, the surface of the resin foam on which the joining object is placed does not have a skin layer formed, and the air bubbles are exposed, making it easier to screw the fixing member into the resin foam.
例えば、樹脂発泡体を製造すると、表面には気泡がほとんどないか、又は内部と比較して気泡が少ない（小さい）スキン層が形成される。このようなスキン層に対しても、固定部材をねじ込むことは可能であるが、樹脂発泡体の切断面であれば、内部の気泡が表面に露出するため、気泡をきっかけとして固定部材をより容易にねじ込むことができる。 For example, when a resin foam is manufactured, a skin layer is formed on the surface that has almost no air bubbles or has fewer (smaller) air bubbles compared to the interior. It is possible to screw a fixing member into such a skin layer, but if it is a cut surface of the resin foam, the internal air bubbles are exposed to the surface, making it easier to screw in the fixing member by using the air bubbles as a trigger.
また、ねじの径を先端側に向かって徐々に小さくなるようにすることで、樹脂発泡体へ、よりねじ込みやすくなる。 In addition, by making the screw diameter gradually smaller toward the tip, it becomes easier to screw into the resin foam.
第２の発明は、樹脂発泡体への接合対象物の接合方法であって、筒部と、前記筒部の一端側にフランジ部を有する治具と、ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、前記ねじの最大外径が、前記頭部の外径以上であり、前記軸部の他方の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面で形成されている固定部材と、を用い、前記筒部に工具を挿入し、前記治具の前記フランジ部側から前記工具の先端を露出させた状態で、前記治具を前記工具に装着し、樹脂発泡体の表面に、予め孔が形成されているシート状部材の面ファスナである接合対象物を配置した状態で、前記フランジ部が前記接合対象物と接触するまで、前記工具で、前記固定部材を前記樹脂発泡体へねじ込むことを特徴とする樹脂発泡体への接合対象物の接合方法である。
第３の発明は、樹脂発泡体への接合対象物の接合方法であって、筒部と、前記筒部の一端側にフランジ部を有する治具と、ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、前記ねじの最大外径が、前記頭部の外径以上である固定部材と、を用い、前記筒部に工具を挿入し、前記治具の前記フランジ部側から前記工具の先端を露出させた状態で、前記治具を前記工具に装着し、樹脂発泡体の表面に接合対象物を配置した状態で、前記フランジ部が前記接合対象物と接触するまで、前記工具で、前記固定部材を前記樹脂発泡体へねじ込み、前記固定部材は、前記軸部の他方の端部近傍には、前記ねじが形成されず、かつ、軸方向に略垂直な断面が縮径されている縮径部が形成されており、当該縮径部の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面となっていて、前記ねじが形成されている範囲の前記軸部には径が同一の部分が存在し、径が同一の部分の径よりも前記縮径部の径が小さいことを特徴とする樹脂発泡体への接合対象物の接合方法である。
A second invention is a method for joining objects to a resin foam, comprising: a tubular portion; a jig having a flange portion on one end side of the tubular portion; a fixing member having a shaft portion with a thread formed thereon and a head formed at one end of the shaft portion, wherein the maximum outer diameter of the thread is equal to or greater than the outer diameter of the head, and the other end of the shaft portion is formed as a plane or curved surface approximately perpendicular to the axial direction of the shaft portion; and a tool is inserted into the tubular portion, and with the tip of the tool exposed from the flange portion side of the jig, the jig is attached to the tool, and with the object to be joined, which is a hook-and-loop fastener made of a sheet-like member having a hole formed in advance, placed on the surface of the resin foam, the fixing member is screwed into the resin foam with the tool until the flange portion comes into contact with the object to be joined.
A third invention is a method for joining objects to a resin foam, comprising: a tubular portion; a jig having a flange portion on one end side of the tubular portion; and a fixing member having a shank portion with a thread formed thereon and a head formed at one end of the shank portion, the maximum outer diameter of the thread being equal to or greater than the outer diameter of the head; a tool is inserted into the tubular portion; the jig is attached to the tool with the tip of the tool exposed from the flange portion side of the jig; and, with an object to be joined placed on the surface of the resin foam, the fixing member is screwed into the resin foam with the tool until the flange portion comes into contact with the object to be joined; and, in a state in which the thread is not formed near the other end of the shank portion, the fixing member has a reduced diameter portion having a cross section approximately perpendicular to the axial direction that is reduced in diameter, the end of the reduced diameter portion has a shape that is a plane or curved surface that is approximately perpendicular to the axial direction of the shank portion; and, in the range of the shank portion where the thread is formed, there is a portion with the same diameter, and the diameter of the reduced diameter portion is smaller than the diameter of the portion with the same diameter.
第２または第３の発明によれば、フランジ部を有する治具を用いることで、樹脂発泡体への固定部材のねじ込み量を容易に調整することができる。 According to the second or third invention, by using a jig having a flange portion, the amount of screwing of the fixing member into the resin foam can be easily adjusted.
本発明によれば、クッション材等の樹脂発泡体に対して、接合対象物を容易に接合することが可能な樹脂発泡体への接合対象物の接合構造等を提供することができる。 The present invention can provide a structure for joining objects to resin foam, such as a cushioning material, that allows the objects to be easily joined to the resin foam.
以下、図面を参照しながら、本発明の実施形態について説明する。図１は、固定部材１の斜視図、図２は側面図である。固定部材１は、主に、頭部３、軸部５等からなる。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a fixing member 1, and FIG. 2 is a side view. The fixing member 1 mainly consists of a head portion 3, a shaft portion 5, etc.
固定部材１の軸部５の外周には、ねじ９が形成される。また、軸部５の一方の端部側に頭部３が設けられる。頭部３は、ドライバーなどの工具によって回転させる部位である。 A screw thread 9 is formed on the outer periphery of the shaft portion 5 of the fixing member 1. A head portion 3 is provided on one end side of the shaft portion 5. The head portion 3 is a part that is rotated by a tool such as a screwdriver.
なお、固定部材１の材質は特に限定されないが、例えば金属製や樹脂製であり、樹脂の場合には、ナイロン６６等の硬質樹脂が適用可能である。なお、固定部材１の材質としては、可撓性を有するような軟質の樹脂（ゴム含む）であってもよい。 The material of the fixing member 1 is not particularly limited, but may be, for example, metal or resin. In the case of resin, hard resin such as nylon 66 can be used. The material of the fixing member 1 may be a soft resin (including rubber) that has flexibility.
固定部材１は、一般的なビス等と同様の構成であるが、以下の点で異なる。通常のビスは、ねじ部をねじ込んで形成される孔に頭部が埋まらないように、頭部に対してねじ部の外径が小さく設定される。一方、固定部材１は、ねじ９の外径（図２のＢ）と、頭部３の外径（図２のＡ）が略同じとすることができる。ここで、ねじ９の外径や頭部３の外径は、後述するように固定部材１がねじ込まれた樹脂発泡体を踏んだ際にも大きな違和感を感じないように選定され、例えば、ねじ９の外径と頭部３の外径が略同じであるとは、頭部３の外径に対して、ねじ９の外径（最大径）が±１０％以内とすればよい。また、ねじ９の外径（最大径）を、頭部３の外径以上としてもよく、ねじ９の外径（最大径）を、頭部３の外径よりも大きくしてもよい。ねじ９の外径が大きくても、後述するように、樹脂発泡体が大きく変形可能であるため、ねじ込むことが可能である。 The fixing member 1 has the same structure as a general screw, but differs in the following respects. In a general screw, the outer diameter of the threaded portion is set smaller than the head so that the head is not embedded in the hole formed by screwing the threaded portion. On the other hand, the fixing member 1 can have the outer diameter of the screw 9 (B in FIG. 2) and the outer diameter of the head 3 (A in FIG. 2) approximately the same. Here, the outer diameters of the screw 9 and the head 3 are selected so that the fixing member 1 is not significantly uncomfortable when stepped on when stepping on a resin foam into which the fixing member 1 is screwed, as described later. For example, the outer diameter of the screw 9 and the outer diameter of the head 3 being approximately the same means that the outer diameter (maximum diameter) of the screw 9 is within ±10% of the outer diameter of the head 3. In addition, the outer diameter (maximum diameter) of the screw 9 may be equal to or larger than the outer diameter of the head 3, or the outer diameter (maximum diameter) of the screw 9 may be larger than the outer diameter of the head 3. Even if the outer diameter of the screw 9 is large, it is possible to screw it in because the resin foam is largely deformable, as described later.
また、通常のビスは、確実に対象物にねじ込むため、軸部の先端近傍までねじが形成され、軸部の先端が鋭利に形成される。一方、固定部材１は、軸部５の先端部７（頭部３とは逆側の軸部５の端部）の形態が鋭利ではなく、軸部５の軸方向に略垂直な平面又は曲面で形成されている。すなわち、固定部材１を軸方向に対して垂直な方向（側面又は正面）から見ると、先端部７は、軸方向に対して略垂直な直線又は下方に凸形状の曲線となる。 In addition, normal screws are threaded up to near the tip of the shank so that they can be screwed securely into an object, and the tip of the shank is formed sharply. On the other hand, the tip 7 of the shank 5 of the fixing member 1 (the end of the shank 5 opposite the head 3) is not sharp, but is formed as a flat or curved surface that is approximately perpendicular to the axial direction of the shank 5. In other words, when the fixing member 1 is viewed from a direction perpendicular to the axial direction (side or front), the tip 7 is a straight line that is approximately perpendicular to the axial direction or a curve that convexly faces downward.
また、固定部材１は、軸部５の先端部７においては、ねじ９が形成されておらず、ねじ９が形成されていない先端部７の軸方向に略垂直な断面が偏平形状である。すなわち、先端部７は、少なくとも一方の方向に対して縮径した形状である。 The fixing member 1 does not have a thread 9 at the tip 7 of the shaft 5, and the cross section of the tip 7 where the thread 9 is not formed, which is approximately perpendicular to the axial direction, is flattened. In other words, the tip 7 has a shape that is reduced in diameter in at least one direction.
例えば、図２に示す側面図において、先端部７の幅（Ｄ）は、ねじ９が形成されている範囲の軸部５の径（Ｃ）よりも小さい。なお、図２と直交する方向から見た図（図２の左右方向から見た図）では、先端部７の幅と、ねじ９が形成されている範囲の軸部５の径とが略一致する。 For example, in the side view shown in FIG. 2, the width (D) of the tip 7 is smaller than the diameter (C) of the shank 5 in the area where the threads 9 are formed. In addition, in a view perpendicular to FIG. 2 (a view from the left and right of FIG. 2), the width of the tip 7 and the diameter of the shank 5 in the area where the threads 9 are formed are approximately the same.
なお、先端部７を偏平させるのではなく、断面が略円形となるように、全体的に縮径させてもよい。この場合でも、先端部７は鋭利にはならず、直線又は曲線となるように形成される。 In addition, instead of flattening the tip 7, the diameter may be reduced overall so that the cross section is approximately circular. Even in this case, the tip 7 is not sharp, but is formed to be straight or curved.
また、軸部５の先端部７に、縮径部（偏平部含む）を形成した場合でも、軸方向に対して所定の長さの直線部（同一径又は同一幅の部位）が形成されることが望ましい。このようにすることで、固定部材１をねじ込む際に、樹脂発泡体に対してまっすぐねじ込むことができる。 Even if a tapered portion (including a flattened portion) is formed at the tip 7 of the shaft portion 5, it is desirable to form a straight portion (a portion of the same diameter or width) of a predetermined length in the axial direction. By doing so, the fixing member 1 can be screwed straight into the resin foam.
次に、樹脂発泡体への接合対象物の接合方法について説明する。図３（ａ）は、樹脂発泡体１５に対して、接合対象物１３を固定部材１で固定する工程を示す図である。 Next, a method for joining an object to be joined to a resin foam will be described. Figure 3(a) shows the process of fixing an object to be joined 13 to a resin foam 15 with a fixing member 1.
樹脂発泡体１５は、例えば、ポリエチレン、直鎖状低密度ポリエチレン、高密度ポリエチレン、エチレン酢酸ビニルコポリマー、又はポリプロピレン樹脂の少なくともいずれか、あるいはこれらの２種以上の混合物であることが望ましい。この際、樹脂発泡体１５の発泡倍率は５倍から４０倍であることが望ましい。 The resin foam 15 is preferably at least one of polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer, and polypropylene resin, or a mixture of two or more of these. In this case, the foaming ratio of the resin foam 15 is preferably 5 to 40 times.
接合対象物１３は、例えば面ファスナなどのシート状の部材であり、予め複数の孔２１が形成される。この際、樹脂発泡体１５には、予め孔を形成置く必要はないが、下穴をあけておいてもよい。まず、樹脂発泡体１５の表面に、接合対象物１３を配置する。この状態で、孔２１に固定部材１の先端部を配置して、工具１１によって固定部材１を樹脂発泡体１５へねじ込む。
The joining object 13 is a sheet-like member such as a hook-and-loop fastener, and has a number of
図３（ｂ）は、図３（ａ）のＥ部の拡大断面図である。樹脂発泡体１５は、前述したように、内部に多数の気泡１９が形成される。一方、樹脂発泡体１５は、通常の製造工程において、表面にごく薄いスキン層１７が形成される。スキン層１７は、気泡１９が存在しないから、内部と比較して、気泡１９が小さく若しくは少ない領域である。 Figure 3(b) is an enlarged cross-sectional view of part E in Figure 3(a). As described above, numerous air bubbles 19 are formed inside the resin foam 15. On the other hand, in the normal manufacturing process, a very thin skin layer 17 is formed on the surface of the resin foam 15. The skin layer 17 is an area in which there are no air bubbles 19, and therefore the number of air bubbles 19 is smaller or fewer than in the interior.
固定部材１は、このようなスキン層１７を有していても使用可能ではあるが、図３（ｃ）に示すように、接合対象物１３が接続される樹脂発泡体１５の表面には、スキン層１７が形成されておらず気泡１９が露出していることが望ましい。例えば、製造された樹脂発泡体１５は、所定のサイズに切断して使用されるが、この切断面には、内部の気泡１９が露出するため、この切断面に対して接合対象物１３を固定することがより望ましい。 Although the fixing member 1 can be used even if it has such a skin layer 17, it is preferable that the surface of the resin foam 15 to which the joining object 13 is connected has no skin layer 17 and the air bubbles 19 exposed, as shown in FIG. 3(c). For example, the manufactured resin foam 15 is cut to a specified size for use, and since the internal air bubbles 19 are exposed on the cut surface, it is more preferable to fix the joining object 13 to this cut surface.
前述したように、固定部材１の先端は、鋭利になっていないため、通常のビスのように、先端でビスが挿入される孔の起点を形成することが困難である。これに対し、気泡１９が露出していると、固定部材１の先端が露出した気泡１９を押し広げ、樹脂発泡体を変形ながら挿入することができるため、固定部材１をより容易にねじ込むことができる。 As mentioned above, the tip of the fixing member 1 is not sharp, so it is difficult to form the starting point of a hole into which the screw is inserted at the tip, as is the case with normal screws. In contrast, if the air bubbles 19 are exposed, the tip of the fixing member 1 can push open the exposed air bubbles 19 and insert the resin foam while deforming it, making it easier to screw in the fixing member 1.
例えば、先端部７には、ねじ９が形成されていないが、先端部７を気泡１９に押し込み、樹脂発泡体１５を変形させることで、ねじ９を樹脂発泡体１５に接触させることができる。この状態で固定部材１をねじ込むことで、先端部７がガイドとして固定部材１のブレを抑制し、まっすぐに固定部材１を樹脂発泡体１５へねじ込むことができる。 For example, the tip 7 does not have a thread 9, but the tip 7 can be pushed into the air bubble 19 to deform the resin foam 15, thereby bringing the thread 9 into contact with the resin foam 15. By screwing the fixing member 1 in this state, the tip 7 acts as a guide to suppress shaking of the fixing member 1, allowing the fixing member 1 to be screwed straight into the resin foam 15.
図４は、このようにして形成される、樹脂発泡体への接合対象物の接合構造２３を示す図である。すなわち、接合構造２３は、樹脂発泡体１５の表面に接合対象物１３が設置され、接合対象物１３を貫通する固定部材１によって、接合対象物１３が樹脂発泡体１５へ固定されて構成される。 Figure 4 shows the thus-formed joining structure 23 for joining objects to a resin foam. That is, the joining structure 23 is formed by placing the joining object 13 on the surface of the resin foam 15, and fixing the joining object 13 to the resin foam 15 with the fixing member 1 penetrating the joining object 13.
以上、本実施の形態によれば、ねじ９を有する固定部材１によって、柔軟な樹脂発泡体１５に対して接合対象物１３を固定するため、両面テープを用いるような場合と比較して、接合対象物１３の剥がれを抑制することができる。また、ねじ９の外径が十分に大きいため、柔軟な樹脂発泡体１５に対しても、ねじ９を確実に食い込ませることができる。 As described above, according to this embodiment, the joining object 13 is fixed to the flexible resin foam 15 by the fixing member 1 having the screw 9, so peeling of the joining object 13 can be suppressed compared to the case where double-sided tape is used. In addition, since the outer diameter of the screw 9 is sufficiently large, the screw 9 can be securely inserted into the flexible resin foam 15.
また、樹脂発泡体１５は柔軟であるため、固定部材１がねじ込まれた部位の樹脂発泡体１５を変形させると、利用者は、内部の固定部材１の形状を認識可能である。この際、固定部材１の先端部７が鋭利ではないため、利用者が樹脂発泡体１５を強く押し込むなどして変形させても、利用者が固定部材１の先端で傷つくことを抑制することができる。例えば、固定部材１が配置された部位の樹脂発泡体１５を利用者が踏みつけても安全である。 In addition, because the resin foam 15 is flexible, when the resin foam 15 is deformed at the site where the fixing member 1 is screwed in, the user can recognize the shape of the fixing member 1 inside. In this case, because the tip 7 of the fixing member 1 is not sharp, even if the user deforms the resin foam 15 by, for example, strongly pushing it, the user is prevented from being injured by the tip of the fixing member 1. For example, it is safe even if the user steps on the resin foam 15 at the site where the fixing member 1 is placed.
また、接合対象物１３が配置される樹脂発泡体１５の表面に、スキン層１７が形成されておらず、気泡１９が露出しているようにすることで、固定部材１の取り付けが容易である。例えば、樹脂発泡体１５の切断面に対して固定部材１を使用することで、露出した気泡１９に固定部材１の先端部が入り込み、気泡１９を押し広げながらねじ込むことができる。 In addition, the surface of the resin foam 15 on which the joining object 13 is placed does not have a skin layer 17 formed, leaving the air bubbles 19 exposed, making it easy to attach the fixing member 1. For example, by using the fixing member 1 on the cut surface of the resin foam 15, the tip of the fixing member 1 can penetrate into the exposed air bubbles 19, allowing the fixing member 1 to be screwed in while pushing the air bubbles 19 apart.
また、固定部材１の先端部７が縮径（偏平）していることで、例えば、気泡１９に先端部７を食い込ませることができ、より容易に固定部材１を樹脂発泡体１５に対して押し込むことができる。 In addition, because the tip 7 of the fixing member 1 is tapered (flattened), for example, the tip 7 can be inserted into the air bubbles 19, making it easier to press the fixing member 1 into the resin foam 15.
なお、柔軟な樹脂発泡体１５へ固定部材１をねじ込むため、固定部材１のねじ込み量が把握しにくい。このため、図５に示すような治具２５を用いてもよい。治具２５は、筒部２７と、筒部２７の一端側に形成されたフランジ部２９を有する。フランジ部２９は、筒部２７の径方向に突出する部位である。 In addition, since the fixing member 1 is screwed into the flexible resin foam 15, it is difficult to grasp the amount of screwing of the fixing member 1. For this reason, a jig 25 as shown in FIG. 5 may be used. The jig 25 has a cylindrical portion 27 and a flange portion 29 formed on one end side of the cylindrical portion 27. The flange portion 29 is a portion that protrudes in the radial direction of the cylindrical portion 27.
まず、フランジ部２９が形成される側とは逆側の端部から、筒部２７に工具１１を挿入する。治具２５のフランジ部２９側から工具１１の先端を露出させた状態で、治具２５を工具１１に装着する。なお、治具２５は、完全に工具１１に固定されていなくてもよく、治具２５のフランジ部２９側の先端側への、工具１１の先端の露出量がある程度規制できればよい。 First, the tool 11 is inserted into the tube portion 27 from the end opposite to the side where the flange portion 29 is formed. With the tip of the tool 11 exposed from the flange portion 29 side of the jig 25, the jig 25 is attached to the tool 11. Note that the jig 25 does not have to be completely fixed to the tool 11, and it is sufficient if the amount of exposure of the tip of the tool 11 to the tip side of the flange portion 29 side of the jig 25 can be regulated to some extent.
次に、図６に示すように、樹脂発泡体１５の表面に接合対象物１３を配置した状態で、フランジ部２９が接合対象物１３と接触するまで、工具１１で、固定部材１を樹脂発泡体１５へねじ込む。フランジ部２９が接合対象物１３と接触することで、接合対象物１３に対して、工具１１の先端がそれ以上深くに入り込むことを抑制することができる。 Next, as shown in FIG. 6, with the object to be joined 13 placed on the surface of the resin foam 15, the fixing member 1 is screwed into the resin foam 15 with the tool 11 until the flange portion 29 comes into contact with the object to be joined 13. By having the flange portion 29 come into contact with the object to be joined 13, it is possible to prevent the tip of the tool 11 from penetrating any deeper into the object to be joined 13.
このように、フランジ部２９によって工具１１のねじ込みが規制され、固定部材１が所定以上ねじ込まれると、工具１１によるねじ込みが空回りする。このように、工具１１による固定部材１のねじ込みが空回りすることで、工具１１が過剰に固定部材１を樹脂発泡体１５にねじ込んでしまうことを抑制することができる。 In this way, the flange portion 29 restricts the screwing of the tool 11, and when the fixing member 1 is screwed in a predetermined amount or more, the tool 11 spins freely. In this way, the tool 11 spins freely when screwing the fixing member 1, thereby preventing the tool 11 from screwing the fixing member 1 excessively into the resin foam 15.
また、前述した実施形態では、ねじ９の外径が略一定である例を示したが、これには限られない。例えば、図７に示す固定部材１ａのように、ねじ９の外径を、頭部３側から先端部７側にいくにつれて、徐々に小さくなるようにしてもよい。なお、軸部５の径は、先端部７を除き略一定である。このようにすることで、樹脂発泡体１５へのねじ込みが容易である。この場合でも、ねじ９の最大外径を、頭部３の外径以上とすることができる。 In addition, in the above-described embodiment, an example was shown in which the outer diameter of the screw 9 was approximately constant, but this is not limited to this. For example, as in the fixing member 1a shown in FIG. 7, the outer diameter of the screw 9 may be gradually reduced from the head 3 side to the tip 7 side. The diameter of the shaft 5 is approximately constant except for the tip 7. This makes it easy to screw into the resin foam 15. Even in this case, the maximum outer diameter of the screw 9 can be made equal to or larger than the outer diameter of the head 3.
以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 Although the embodiment of the present invention has been described above with reference to the attached drawings, the technical scope of the present invention is not limited to the above-mentioned embodiment. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present invention.
例えば、本発明において、樹脂発泡体１５は、避難所区画に使用されるクッション材には限られない。例えば、装飾用の樹脂発泡体や、風呂マット等であってもよい。 For example, in the present invention, the resin foam 15 is not limited to cushioning materials used in evacuation shelter sections. For example, it may be a decorative resin foam or a bath mat, etc.
また、本発明において、接合対象物１３は、面ファスナには限られない。例えば、樹脂発泡体１５の表面に、抗菌シートや防護シートなど、他の接合対象物を固定する場合にも適用可能である。また、何らかの表示用のシートなどを接合してもよい。 In addition, in the present invention, the joining object 13 is not limited to a hook-and-loop fastener. For example, it can also be applied to the case where other joining objects, such as antibacterial sheets or protective sheets, are fixed to the surface of the resin foam 15. Also, some kind of display sheet may be joined.
また、接合対象物１３も樹脂発泡体であってもよく、この場合、異なる材質の樹脂発泡体を積層させて使用するような場合においても適用可能である。例えば、発泡倍率、硬度又は色などが異なる樹脂発泡体同士を接合する際にも適用可能である。 The object to be joined 13 may also be a resin foam, in which case it is also applicable to cases where resin foams of different materials are laminated and used. For example, it is also applicable when joining resin foams with different expansion ratios, hardness, colors, etc.
１、１ａ………固定部材
３………頭部
５………軸部
７………先端部
９………ねじ
１１………工具
１３………接合対象物
１５………樹脂発泡体
１７………スキン層
１９………気泡
２１………孔
２３………接合構造
２５………治具
２７………筒部
２９………フランジ部
１００、１００ａ、１００ｂ………樹脂発泡体
１０１ａ、１０１ｂ………面ファスナ
1, 1a... Fixing member 3... Head 5... Shank 7... Tip 9... Screw 11... Tool 13... Joining object 15... Resin foam 17... Skin layer 19...
Claims (6)
前記樹脂発泡体の表面に接合対象物が設置され、前記接合対象物を貫通する固定部材によって、前記接合対象物が前記樹脂発泡体へ固定されており、
前記固定部材は、ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、
前記ねじの最大外径が、前記頭部の外径以上であり、
前記軸部の他方の端部近傍には、前記ねじが形成されず、かつ、軸方向に略垂直な断面が縮径されている縮径部が形成されており、当該縮径部の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面となっていて、
前記ねじが形成されている範囲の前記軸部には径が同一の部分が存在し、径が同一の部分の径よりも前記縮径部の径が小さいことを特徴とする樹脂発泡体への接合対象物の接合構造。 A structure for joining an object to be joined to a resin foam, comprising:
an object to be joined is placed on a surface of the resin foam, and the object to be joined is fixed to the resin foam by a fixing member penetrating the object to be joined;
The fixing member has a threaded shaft portion and a head portion formed at one end of the shaft portion,
The maximum outer diameter of the screw is equal to or greater than the outer diameter of the head,
A reduced diameter portion is formed in the vicinity of the other end of the shaft portion, where the thread is not formed, and a cross section substantially perpendicular to the axial direction is reduced in diameter, and the shape of the end of the reduced diameter portion is a flat surface or a curved surface substantially perpendicular to the axial direction of the shaft portion,
A joining structure for an object to be joined to a resin foam, characterized in that there is a portion of the shaft portion having the same diameter in the area where the screw is formed, and the diameter of the reduced diameter portion is smaller than the diameter of the portion of the same diameter.
筒部と、前記筒部の一端側にフランジ部を有する治具と、
ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、前記ねじの最大外径が、前記頭部の外径以上であり、前記軸部の他方の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面で形成されている固定部材と、を用い、
前記筒部に工具を挿入し、前記治具の前記フランジ部側から前記工具の先端を露出させた状態で、前記治具を前記工具に装着し、
樹脂発泡体の表面に、予め孔が形成されているシート状部材の面ファスナである接合対象物を配置した状態で、前記フランジ部が前記接合対象物と接触するまで、前記工具で、前記固定部材を前記樹脂発泡体へねじ込むことを特徴とする樹脂発泡体への接合対象物の接合方法。 A method for joining an object to be joined to a resin foam, comprising the steps of:
A jig having a cylindrical portion and a flange portion on one end side of the cylindrical portion;
a fixing member having a shaft portion on which a screw is formed and a head portion formed at one end of the shaft portion, the maximum outer diameter of the screw being equal to or larger than the outer diameter of the head portion, and the other end of the shaft portion being formed with a flat surface or a curved surface substantially perpendicular to the axial direction of the shaft portion;
A tool is inserted into the cylindrical portion, and the jig is attached to the tool in a state where a tip of the tool is exposed from the flange portion side of the jig;
A method for joining objects to a resin foam, characterized in that the object to be joined, which is a hook-and-loop fastener made of a sheet-like material with holes pre-formed therein, is placed on the surface of a resin foam, and the fixing member is screwed into the resin foam with the tool until the flange portion comes into contact with the object to be joined.
筒部と、前記筒部の一端側にフランジ部を有する治具と、
ねじが形成された軸部と、前記軸部の一方の端部に形成された頭部とを有し、前記ねじの最大外径が、前記頭部の外径以上である固定部材と、を用い、
前記筒部に工具を挿入し、前記治具の前記フランジ部側から前記工具の先端を露出させた状態で、前記治具を前記工具に装着し、
樹脂発泡体の表面に接合対象物を配置した状態で、前記フランジ部が前記接合対象物と接触するまで、前記工具で、前記固定部材を前記樹脂発泡体へねじ込み、
前記固定部材は、
前記軸部の他方の端部近傍には、前記ねじが形成されず、かつ、軸方向に略垂直な断面が縮径されている縮径部が形成されており、当該縮径部の端部の形態が、前記軸部の軸方向に略垂直な平面又は曲面となっていて、
前記ねじが形成されている範囲の前記軸部には径が同一の部分が存在し、径が同一の部分の径よりも前記縮径部の径が小さいことを特徴とする樹脂発泡体への接合対象物の接合方法。 A method for joining an object to be joined to a resin foam, comprising the steps of:
A jig having a cylindrical portion and a flange portion on one end side of the cylindrical portion;
A fixing member having a shaft portion having a screw and a head portion formed at one end of the shaft portion, the maximum outer diameter of the screw being equal to or greater than the outer diameter of the head portion,
A tool is inserted into the cylindrical portion, and the jig is attached to the tool in a state where a tip of the tool is exposed from the flange portion side of the jig;
With an object to be joined placed on a surface of a resin foam, the fixing member is screwed into the resin foam with the tool until the flange portion comes into contact with the object to be joined;
The fixing member is
A reduced diameter portion is formed in the vicinity of the other end of the shaft portion, where the thread is not formed, and a cross section substantially perpendicular to the axial direction is reduced in diameter, and the shape of the end of the reduced diameter portion is a flat surface or a curved surface substantially perpendicular to the axial direction of the shaft portion,
A method for joining objects to a resin foam, characterized in that there is a portion of the shaft portion having the same diameter in the area where the thread is formed, and the diameter of the reduced diameter portion is smaller than the diameter of the portion of the same diameter.
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| JPS6224010A (en) * | 1985-07-24 | 1987-02-02 | クラウン精密工業株式会社 | Screwing structure in thin metallic plate |
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