Detachable structure, suspender, fixture, pickup tool, and welfare article

Abstract

This structure (1000) can be attached to and detached from a surface (200) of an object (M2) and comprises: a plurality of structure units (100) that can be attached to and detached from the surface of the object (M2); a connection part (90) connected to each of the plurality of structure units (100); and a binding part (91) configured to bind the connection parts (90) connected to the plurality of structure units (100) so that, when the structure (1000) is adhered to the surface (200), the plurality of structure units (100) do not detach from the surface (200). Each of the plurality of structure units (100) has at least one attachment / detachment part (20), and the attachment / detachment part (20) includes a shaft (24) and an adhesive film (21) provided at the tip of the shaft (24).

Description

Detachable structures, hanging devices, fixtures, pick-up devices, and assistive devices

[0001] The present invention relates to a detachable structure, a hanging device, a fixing device, a pickup device, and a welfare product. This application claims priority to Japanese Patent Application No. 2023-211173, filed on December 14, 2023, the contents of which are incorporated herein by reference.

[0002] Pressure-sensitive adhesive sheets using removable pressure-sensitive adhesives that can be removed without leaving adhesive residue on the adherend even after a certain period of time has passed since they were attached to the adherend have been known for some time. Pressure-sensitive adhesive sheets are used in various fields, such as the manufacturing process of electronic devices. In recent years, there has been a demand for increasingly high adhesive strength, and the surface shapes of the adherends have become more complex. Furthermore, for example, when used in the manufacturing process of electronic devices, so-called "rework" may be performed, in which the pressure-sensitive adhesive sheet is peeled (detached) from the component in the product in order to reuse the component. Therefore, pressure-sensitive adhesive sheets are required to have both excellent adhesion and conformability to the adherend, as well as be easily removable.

[0003] In light of this situation, the present inventor has focused on the adhesive leg structure of small animals, which allows them to detachably attach themselves to substrates with a variety of surface shapes, and has conducted extensive research. In the course of this research, the inventor analyzed the mechanism by which flies form setae during the pupal stage, and, inspired by this, invented an adhesive structure that combines excellent conformability to substrates and excellent adhesive strength, and is also easily detachable from substrates (Patent Document 1). The adhesive structure disclosed in Patent Document 1 has a structure that mimics the legs of a fly.

[0004] Patent No. 7195026

[0005] The adhesive strength of the adhesive structure of Patent Document 1 changes sensitively depending on the direction (angle) of the force applied to the structure when it is attached (bonded) to an adherend. By utilizing this property, the adhesive structure of Patent Document 1 can achieve both strong adhesive strength to the adherend and ease of detachment from the adherend by changing the direction of the force applied to the structure.

[0006] On the other hand, this characteristic means that the usable range of the bonded structure is limited to the range of angles where it exhibits strong adhesive strength. Therefore, if the usable range of the bonded structure can be expanded while achieving both strong adhesive strength and ease of detachment (peeling), further expansion of the applications of the bonded structure can be expected.

[0007] The present invention solves the above-mentioned problems by providing an adhesive mechanism (structure) that can be attached to and detached from various locations.

[0008] As a result of extensive research into achieving the above object, the inventors of the present application have found that the above object can be achieved by the following configuration.

[0009] [1] A structure detachable from the surface of an object, comprising: a plurality of structure units detachable from the surface of the object; connecting portions connected to each of the plurality of structure units; and a binding portion configured to bind the connecting portions connected to the plurality of structure units to each other so that the plurality of structure units do not detach from the surface when the structure is adhered to the surface, wherein each of the plurality of structure units has at least one detachable portion, and the detachable portion includes a shaft and an adhesive film provided on a tip of the shaft. [2] The structure according to [1], wherein the binding portion is formed by connecting the connecting portions that connect the plurality of structure units to each other. [3] The structure according to [1], wherein the binding portion is a separate member from the connecting portion. [4] The structure according to any one of [1] to [3], wherein at least one of the plurality of structure units is further provided with a detachment knob. [5] The structure according to [4], wherein the detachment knob is provided on at least two of the plurality of structural units, and the detachment knobs are connected to each other. [6] The structure according to any one of [1] to [5], wherein the structure includes two to six structural units. [7] The structure according to any one of [1] to [6], wherein each of the plurality of structural units comprises: a support having an opposing side that is disposed opposite the surface when adhered to the surface, and a back side that is located opposite the opposing side in a stacking direction that intersects with the surface; a plurality of detachable parts that are supported on the opposing side of the support and are detachable to the surface; and a buffer part that corresponds to at least one of the plurality of detachable parts and is disposed between the corresponding at least one detachable part and the back side of the support in the stacking direction, wherein each of the plurality of detachable parts is disposed with the axis facing one side in an arrangement direction that is perpendicular to the stacking direction, and the adhesive film facing the other side, wherein one side in the arrangement direction is fixed to the support and forms a fixed end, and the other side in the arrangement direction forms a movable end that is configured to be movable in a direction away from the support with the fixed end as a fulcrum.[8] The structure according to [7], wherein the connecting portion is connected to an end portion on one side in the arrangement direction of each of the plurality of structural units. [9] The structure according to any one of [1] to [6], wherein each of the plurality of structural units is constituted by one detachable portion, and the axis of the detachable portion constitutes the connecting portion.

[10] The structure according to any one of [1] to [9], wherein in the detachable portion, the axis is formed by a fused portion where a portion of a plurality of first aggregates are fused together, and the adhesive film is supported by unfused portions of the plurality of first aggregates.

[11] The structure according to any one of [1] to

[10] , wherein the connecting portions are bound together by the binding portion.

[12] A hanging device comprising the structure according to any one of [1] to

[11] .

[13] A fixture comprising the structure according to any one of [1] to

[11] .

[14] A pick-up tool comprising the structure according to any one of [1] to

[11] .

[15] A welfare product comprising the structure according to any one of [1] to

[11] .

[16] A method of using the structure according to any one of [1] to

[10] , comprising: adhering the plurality of structural units to the surface with the shaft side of the detachable part facing a virtual binding point set on the surface and arranging the plurality of structural units around the virtual binding point; and binding the connecting parts connected to the plurality of structural units together with the binding part so that the plurality of structural units do not detach from the surface.

[0010] The present invention provides an adhesive mechanism (structure) that can be attached and detached to various locations.

[0011] 1A is a schematic diagram of a structure adhered to the surface of an object in an embodiment. FIG. 1B is a schematic diagram of a structure detached from the surface of an object in an embodiment. FIG. 1C is a schematic diagram of the structure shown in FIG. 1A viewed from the opposite side of the support (from the surface side of the object). FIG. 1D is a cross-sectional view (III)-(III) of the structure unit shown in FIG. 2. FIG. 1E is an enlarged view of a detachable part of an embodiment (with a second aggregate). FIG. 1F is an enlarged view of a detachable part of an embodiment (without a second aggregate). FIG. 1G is an enlarged view of a detachable part of an embodiment. FIG. 1H is an enlarged view of a detachable part of an embodiment. FIG. 1I is a flowchart showing a method of using a structure according to an embodiment. FIG. 1J is a flowchart showing another method of using a structure according to an embodiment. FIG. 1I is a schematic diagram of an example of a structure including two structure units viewed from the opposite side of the support (from the surface side of the object). FIG. 1I is a schematic diagram of an example of a structure including three structure units viewed from the opposite side of the support (from the surface side of the object). FIG. 1I is a schematic diagram of an example of a structure including four structure units viewed from the opposite side of the support (from the surface side of the object). 7B is a schematic diagram showing another example of a structure having four structure units as viewed from the opposite side of the support (from the surface side of the target object) in an embodiment. FIG. 7C is a schematic diagram showing a state in which an object (M1) is suspended from a surface (200) using a structure in an embodiment. FIG. 7D is a schematic diagram showing a state in which the structure has been detached from the surface (200) in the configuration shown in FIG. 7A. FIG. 7E is a schematic diagram showing a state in which the object (M1) is suspended from a vertical surface (200) using a structure in the configuration shown in FIG. 7C. FIG. 7F is a schematic diagram showing a state in which the object (M1) is suspended from a curved surface (200) using a structure. FIG. 7G is a schematic diagram showing a state in which an object (M1) is suspended by adhering multiple structure units of the structure to different surfaces (200) in an embodiment. 8A is a schematic diagram showing a state in which an object (M1) is suspended by adhering a plurality of structure units of a structure to different surfaces (200) in an embodiment. It is a schematic diagram showing a state in which an object (M2) is suspended (lifted) using the structure in an embodiment. It is a schematic diagram showing a state in which the structure is detached from the object (M2) in the configuration shown in FIG.8C is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a structural unit to a vertical surface (200) of the object (M2) in the embodiment. FIG. 8D is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a structural unit to a surface (200) inclined with respect to the vertical direction in the configuration shown in FIG. 8C. FIG. 8C is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a structural unit to a curved surface (200) of the object (M2). FIG. 8D is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a plurality of structural units of a structure to different surfaces (200) of the object (M2) in the embodiment. FIG. 8C is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a plurality of structural units of a structure to different surfaces (200) of the object (M2). FIG. 8D is a schematic diagram showing a state in which an object (M2) is suspended (lifted) by adhering a plurality of structural units of a structure to different surfaces (200) of the object (M2). 13 is a schematic diagram of an example of a structure including a structural unit having a detachment knob. FIG. 9B is a schematic diagram showing a state in which the detachment knob is pulled in a direction away from the surface in the configuration shown in FIG. 9A. FIG. 9C is a schematic diagram showing a state in which the detachment knob is pulled in a direction away from the surface in the configuration shown in FIG. 9C. FIG. 9D is a flowchart showing a method for manufacturing a structural unit of an embodiment. FIG. 9E is a diagram explaining an example of a method for manufacturing a detachable portion (adhesive film: triangle). FIG. 9F is a diagram explaining another example of a method for manufacturing a detachable portion (adhesive film: triangle). FIG. 9G is a diagram and a photograph explaining an example of a method for manufacturing a detachable portion (adhesive film: diamond). FIG. 9H is a diagram and a photograph explaining an example of a method for manufacturing a detachable portion (adhesive film: heart shape). FIG. 9I is a diagram explaining an example of a method for manufacturing a detachable portion (adhesive film: diamonds (plural)). FIG. 9I is a diagram explaining a part of a method for manufacturing a structural unit. FIG. 13 is a (XIII)-(XIII) cross-sectional view of the third unit shown in FIG. 12. FIG. 14 is a diagram explaining another part of a method for manufacturing a structural unit. FIG. 15 is a schematic cross-sectional view showing a state in which a structure of Modified Example 1 of an embodiment is adhered to a surface. 16A is a schematic cross-sectional view showing a state in which the structure shown in FIG. 15A has been detached from the surface. FIG. 16B is a schematic cross-sectional view showing a state in which the structure of Modification 2 of the embodiment is adhered to the surface. FIG. 16C is a photograph of a structure produced in an example for the configuration shown in FIG.16B is a schematic cross-sectional view showing a state in which the structure shown in FIG. 16A has been detached from the surface. FIG. 16C is a photograph showing a state in which the structure shown in FIG. 16B is being detached from the surface. FIG. 16D is a schematic view of a structure including two structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. FIG. 16E is a schematic view of a structure including three structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. FIG. 16F is a schematic view of a structure including four structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. FIG. 16G is a schematic view of a structure including six structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. FIG. 16H is a schematic view of a structure including two structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. FIG. 16I is a schematic view of a structure including three structure units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment. 10A and 10B are schematic diagrams of a structure including four structural units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment, and a structure including six structural units as viewed from the opposite side of the support (from the surface side of the target object) in Modification Example 2 of the embodiment.

[0012] The present invention will be described in detail below. The following description of the constituent elements may be based on a representative embodiment of the present invention, but the present invention is not limited to such an embodiment. In this specification, a range expressed using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits.

[0013] [Structure] In this embodiment, a structure 1000 that can be attached to and detached from the surface 200 of an object (adherend) will be described, as shown in Figures 1A and 1B. The structure 1000 has a plurality of structure units 100 that can be attached to and detached from the surface 200 of the object, connecting portions 90 connected to each of the structure units 100, and a bundling portion 91 configured to bundling the connecting portions 90 connected to each of the plurality of structure units 100. Figures 1A, 1B, and 2 show an example that includes two structure units 100. The structure according to the present invention is an invention that utilizes a phenomenon called directional adhesion, which exhibits strong peel strength in only one direction.

[0014] Similar to the adhesive structure disclosed in Patent Document 1, the adhesive strength of the structure unit 100 changes sensitively depending on the direction of the force applied to the structure unit 100 when it is attached (adhered) to an object. For example, as shown in FIG. 1A , when the structure unit 100 is adhered to a surface 200, the closer the direction F1 of the force applied to the structure unit 100 is to a direction Y1 within the surface 200 (the direction Y1 from the movable end 20 b toward the fixed end 20 a of the detachable portion 20 of the structure unit 100, which will be described later; see FIGS. 2 and 3 ), the higher the adhesive strength. Here, the smaller of the angles formed by the direction Y1 and the force direction F1 is defined as angle θ. When the angle θ is, for example, 20° to 30° or less, or 0° (i.e., the direction Y1 and the direction F1 are the same), the structure unit 100 exhibits high adhesive strength. When the angle θ exceeds, for example, 20 to 30°, the adhesive force drops sharply, and a smaller force is required to detach the structural unit 100 from the surface 200. Note that the arrow (F1) in Fig. 1A indicates only the "direction" of the force, and the length of the arrow is unrelated to the magnitude of the force.

[0015] The characteristic that the adhesive strength changes sensitively depending on the direction of force F is an important characteristic from the viewpoint of ease of attachment and detachment of the structural unit 100. However, on the other hand, this also means that the usable angular range of the adhesive structure 1000 is limited to the range of angles that exhibits strong adhesive strength (for example, θ in FIG. 1A is 30° or less). Therefore, the present inventors investigated ways to expand the usable range of the structure 1000, and arrived at the present invention.

[0016] The structure 1000 according to an embodiment of the present invention includes a binding portion 91 configured to bind the connecting portions 90 together so that the structure units 100 do not detach from the surface 200 when adhered to the surface 200. For example, assume that the structure 1000 is used to hang an object M1 from a ceiling (surface 200) (see FIG. 1A ). If the object M1 were hung from the connecting portions 90 without binding the connecting portions 90, a load would be applied to the structure units 100 in the direction of gravity (a direction perpendicular to the ceiling 200) (θ in FIG. 1A is 90°), causing the structure units 100 to detach from the surface 200. In this embodiment, by binding the connecting portions 90 together with the binding portion 91, even if a load is applied to the connecting portions 90, it is possible to prevent a force from being applied to each structure unit 100 in a direction that would easily cause detachment (e.g., θ = 90°), and as a result, the adhesive strength to the surface 200 can be maintained. This makes it possible to suspend object M1 from the ceiling (surface 200) using structure 1000 of this embodiment. Then, as shown in Fig. 1B, by releasing connecting portion 90 from binding portion 91, structure 1000 can be easily detached from the ceiling (surface 200).

[0017] As described above, the structure 1000 of this embodiment has a very simple configuration, yet has a wide range of usability (for example, the range of load directions relative to the surface 200 that can be applied to the structure 1000 when the structure 1000 is adhered to the surface 200). The structure 1000 has strong adhesive strength to the surface 200 of the object and can be easily detached (peeled off). Furthermore, unlike thumb tacks or nails, the structure 1000 does not pose a risk of damaging the wall surface 200. The structure 1000 can be used as a hanging device for suspending an object M1 from the surface 200 (see FIGS. 7A to 7G), and can also be used as a hanging device for suspending an object M2 having a surface 200 (see FIGS. 8A to 8G). The hanging device (structure 1000) shown in FIGS. 8A to 8G can also be used as an auxiliary tool for transporting the object M2. Details of each component of the structure 1000 are described below.

[0018] 1. Structural Unit The structural unit 100 is detachable from the surface 200 of an object (adherend). As shown in FIGS. 2 to 4A and 4B , the structural unit 100 has a support 10, a plurality of detachable sections 20 supported by the support 10 and detachable from the surface 200, and a buffer section 40 corresponding to at least one of the detachable sections 20. In the following description, when the structural unit 100 is adhered to the surface 200, the direction intersecting the surface 200 (the z direction shown in FIG. 3 , the direction perpendicular to the paper surface of FIG. 2 ) is defined as the "stacking direction," the direction perpendicular to the stacking direction z is defined as the "arrangement direction" (the y direction shown in FIGS. 2 and 3 ), and the direction perpendicular to the stacking direction and the arrangement direction is defined as the "width direction" (the x direction shown in FIGS. 2 and 3 ). Each component of the structural unit 100 will be described below.

[0019] <Support> The support 10 has an opposing side 11 and a back side 12 located opposite the opposing side 11 in the stacking direction (z direction). The opposing side 11 is the side that faces the surface 200 when the structural unit 100 is adhered to the surface 200. The shape and size (thickness, area of ​​the opposing side 11 and the back side 12, etc.) of the support 10 are not particularly limited and can be designed appropriately depending on the application of the structure 1000. For example, the support 10 may be flat or sheet-like, may have a three-dimensional shape with a curved surface, or may have a shape that combines these. Furthermore, the support 10 may be a fabric such as a woven fabric, a nonwoven fabric, or a knitted fabric, and may be a single-layer body or a multi-layer body (laminate). If the support 10 is fabric, it is easy to align and fix multiple detachable parts 20 to the support 10 by sewing or the like. Furthermore, the support 10 preferably has softness and / or flexibility so that it can easily follow the irregularities (surface roughness), curvature, etc. of the surface 200 .

[0020] The material of the support 10 is not particularly limited, and examples thereof include organic materials, inorganic materials, and composite materials thereof. The organic material is not particularly limited, and examples thereof include resins. Examples of resins include polyamide resins (e.g., nylon), polyethylene resins, polyester resins such as polyethylene terephthalate (PET), polycarbonate resins, (meth)acrylic resins, epoxy resins, polyurethane resins, polyolefin resins, cellulose derivatives, silicone resins, and polyvinyl alcohol (PVA). The support 10 may be a foam of these resins. Furthermore, when cloth is used for the support 10, the material is not particularly limited, and examples include natural fibers (e.g., animal hair such as cotton, linen, silk, and wool), chemical fibers (e.g., nylon, the above-mentioned resins), and blends thereof. The support 10 may be made of a single material or multiple materials.

[0021] <Detachable Parts> The plurality of detachable parts 20 are supported on the opposing side 11 of the support body 10. Each detachable part 20 has a fixed end 20a fixed to the support body 10 and a movable end 20b configured to be movable (e.g., rotatable) in a direction away from the support body 10 around the fixed end 20a as a rotation axis (fulcrum, center of rotation). The fixed end 20a is an end on one side in the arrangement direction (y direction), and the movable end 20b is an end on the other side in the arrangement direction. The arrangement of the plurality of detachable parts 20 is not particularly limited, but rather, as described above, it is preferable that the detachable parts 20 are arranged directionally along one direction (arrangement direction y) with the fixed end 20a facing one side in the arrangement direction y and the movable end 20b facing the other side in the arrangement direction y, rather than being arranged randomly.

[0022] Each of the multiple detachable parts 20 is composed of a shaft 24 and an adhesive film 21 provided on the tip of the shaft 24. Each of the detachable parts 20 is arranged with the shaft 24 facing one side in the arrangement direction (y direction) and the adhesive film 21 facing the other side. The shaft 24 is formed by a fused portion formed by partially fused together at least two (i.e., multiple) first aggregates 22. The adhesive film 21 is supported by unfused portions of the multiple first aggregates 22. The first aggregates 22 connect the fixed end 20a and the movable end 20b of the detachable part 20. This structure allows multiple detachable parts 20 to be manufactured efficiently.

[0023] When there are two first aggregates 22, they are arranged at both ends of the adhesive film 21 in the width direction (x direction) (22A in FIGS. 4A and 4B). When there are three or more first aggregates 22, one or more first aggregates 22B are provided between the first aggregates 22A at both ends. The number of first aggregates 22 is not particularly limited as long as it is two or more, and may be designed based on the intended use of the structural unit 100, etc. From the viewpoint of increasing the strength of the detachable part 20, however, it is preferable to provide three or more first aggregates 22, and for example, the number may be 3 to 30. Furthermore, the first aggregates 22 may be linear, curved, or a combination thereof.

[0024] In order to prevent the detachable portion 20 from coming off the structural unit 100 due to repeated attachment and detachment of the structural unit 100, the joined shafts 24 are preferably fixed to the support body 10. For example, when a laminate of fabric is used as the support body 10, the shafts 24 may be folded between the layers of the laminate and further sewn to the support body 10. Furthermore, it is preferable that the shafts 24 are fixed to the support body 10 in a state where they extend in the arrangement direction (y direction), and that the multiple shafts 24 are approximately parallel to each other.

[0025] The multiple detachable portions 20 may be made of a material similar to the "structure" disclosed in Patent Document 1, which was previously filed by the inventor of the present application. For example, the first aggregate 22 of this embodiment may be made of a material similar to the flexible material constituting the shaft material of Patent Document 1, and the adhesive film 21 of this embodiment may be made of a material similar to the adhesive portion of Patent Document 1. The contents of Patent Document 1 are incorporated herein by reference.

[0026] In this embodiment, the first aggregate 22 is preferably a flexible material. This allows it to deform to match the surface shape of the surface 200 and exhibit excellent adhesive strength. In this specification, a flexible material refers to a material that is elastically deformable due to the stress generated when the material is pressed against the surface 200. In other words, the flexibility of a material can be defined by its elastic deformability in relation to the stress required for initial adhesion between the detachable portion 20 and the surface 200. Because the detachable portion 20 includes aggregates made of a flexible material, the aggregates deform according to the surface structure of the surface 200 when the detachable portion 20 is adhered to the surface 200. This allows the detachable portion 20 to have excellent conformability. Furthermore, the repulsive force of the aggregates makes it easier for the adhesive film 21 to be pressed against the surface 200, resulting in superior adhesion of the detachable portion 20 to the surface 200. Known materials can be used as the flexible material. Examples of flexible materials include organic materials, inorganic materials, and composites thereof. Examples of inorganic materials include, but are not limited to, metals and glass. Examples of organic materials include, but are not limited to, resins. Examples of resins include, but are not limited to, olefin-based resins, acrylic-based resins, styrene-based resins, halogen-containing resins, vinyl ester-based resins, polyester-based resins, polyamide-based resins, polycarbonate-based resins, polyurethane-based resins, poly(thio)ether-based resins, polysulfone-based resins, polyether ketone-based resins, polyimide-based resins, polyacetal-based resins, cellulose ester-based resins (such as cellulose acetate), and thermoplastic elastomers. Examples of poly(thio)ether-based resins include polyphenylene ether-based resins and polysulfide-based resins such as polyphenylene sulfide-based resins. Examples of polysulfone-based resins include polysulfone resins and polyethersulfone-based resins. Examples of polyether ketone-based resins include polyphenylene ether ether ketone-based resins. Examples of polyimide resins include polyetherimide resins, polyamideimide resins, and polybenzimidazole resins. Examples of cellulose ester resins include cellulose acetate.Examples of the thermoplastic elastomer include polyamide-based elastomers such as polyamide-polyether block copolymers, polyester-based elastomers, polyurethane-based elastomers, polystyrene-based elastomers, polyolefin-based elastomers, and fluorine-based thermoplastic elastomers. The organic material may contain one type of resin alone or two or more types.

[0027] Furthermore, fibers can be used as the flexible material. Examples of fibers include nylon fibers (tensile strength 4.2 to 5.6 cN / dtex, elongation 28 to 45%), polyethylene fibers (tensile strength 4.4 to 7.9 cN / dtex, elongation 8 to 35%), polyester fibers (tensile strength 4.6 to 7.3 cN / dtex, elongation 11 to 43%), and acrylic fibers (tensile strength 2.2 to 4.4 cN / dtex, elongation 25 to 50%). The first aggregates 22 may be made of a single material or two or more materials.

[0028] The adhesive film 21 of this embodiment preferably contains a pressure-sensitive adhesive, such as an acrylic resin, a urethane resin, a rubber resin, a silicone resin, or a resin that combines these structures. The adhesive film 21 of this embodiment may also be made of a polyether polymer, polyester, polyamide, a chlorine-based polymer, or a fluorine-based polymer. The adhesive film 21 may be made of a single material or two or more materials.

[0029] As shown in FIG. 4A , the detachable portion 20 may further include at least one second aggregate 23 intersecting the first aggregate 22. The second aggregate 23 may be made of the same material as the first aggregate 22. The inclusion of the second aggregate 23 increases the strength of the detachable portion 20 and, at the same time, increases the flexibility of the shape of the adhesive film 21. For example, as will be described in detail later, the inclusion of the second aggregate 23 allows for efficient production of adhesive films 21 in shapes such as diamonds and hearts (see FIGS. 11C to 11E ). The number of second aggregates 23 is not particularly limited and may be designed based on the intended use of the structure 1000, but may be, for example, 1 to 100. Alternatively, as shown in FIG. 4B , the detachable portion 20 may not include the second aggregate 23 and the adhesive film 21 may be supported only by the first aggregate 22. The embodiment shown in FIG. 4B has a simple structure and is highly durable (not easily broken). As shown in FIG. 4C , the adhesive film 21 may be configured with triangular portions 21A and rectangular portions 21B arranged sequentially along the axis 24. In this configuration, the axial length is longer than that of the adhesive film shown in FIGS. 4A and 4B , so it is preferable to increase the number of second aggregates 23 to increase the strength of the detachable portion 20. In the adhesive film 21 shown in FIG. 4C , adding a rectangular portion 21B to the adhesive film shown in FIGS. 4A and 4B increases the surface area and improves adhesive strength, but also makes it more difficult to detach. Therefore, it is preferable to select an adhesive film with or without a rectangular portion depending on the application. In preliminary experiments, the adhesive strength of the adhesive film 21 shown in FIG. 4C was maximized when the ratio of length to width (length of rectangular portion / width) was approximately 1. Therefore, it is preferable to use a film with a length to width ratio in the range of 0.1 to 1.5. The adhesive film 21 shown in FIG. 4D is another example of a configuration having a rectangular portion, and has a rectangular portion 21B between triangular portions 21Aa and 21Ab that form a diamond as shown in FIG. 11C.

[0030] The adhesive film 21 has a detachable adhesive surface 21a on the surface 200. The shape of the adhesive surface 21a is not particularly limited, but it is preferable that the width in the width direction (x direction) continuously increases from one end in the arrangement direction (y direction) to a predetermined position toward the other end (e.g., up to P1 shown in Figures 11A to 11E). For example, if peeling of the adhesive film 21 begins from one end in the arrangement direction (y direction) where the fixed end 20a is located, reducing the width of the end on one side of the adhesive surface 21a in the arrangement direction (y direction) can enable detachment (peeling) with less force. Furthermore, continuously increasing the area along the arrangement direction y ensures the area of ​​the adhesive surface 21a and maintains high adhesive strength. Examples of such shapes of the adhesive surface 21a include triangles (spatula-shaped), sectors, trapezoids, semicircles, circles, polygons such as diamonds, and hearts (see Figures 11A to 11E). From the viewpoint of further enhancing the effect, it is more preferable that the width of the adhesive surface 21 a in the width direction (x direction) continuously increases from one end to the other end in the arrangement direction (y direction). Examples of the shape of such adhesive surface 21 a include a triangle (spatula shape), a sector shape, a trapezoid, a semicircle, etc.

[0031] The fixed end 20a may be provided on the adhesive film 21 or on the shaft 24. When the fixed end 20a is provided on the adhesive film 21, the entire shaft 24 is fixed to the support 10, and only the adhesive film 21 is configured to be movable. On the other hand, when the fixed end 20a is provided on the shaft 24, a portion of the shaft 24 located closer to the adhesive film 21 than the fixed end 24a (hereinafter referred to as the "movable portion of the shaft 24") is not fixed to the support 10 and is configured to be movable together with the adhesive film 21. However, if the portion of the movable shaft 24 is too long, there is a risk of increased variation in waviness, orientation, etc. between the multiple adhesive surfaces 21a. In the arrangement direction (y direction), it is preferable that the length (L1) of the portion of the movable shaft 24 be sufficiently shorter than the length (L2) of the adhesive film 21. For example, the ratio (L1 / L2) is preferably 0 to 0.5.

[0032] The size (thickness, width, etc. of the adhesive film 21), number, etc. of the detachable parts 20 are not particularly limited and can be designed appropriately depending on the application of the structure 1000, and may be within the following ranges, for example: width of the adhesive surface 21a (maximum width in the x direction): 1 mm to 20 mm, thickness of the adhesive film 21: 0.1 mm to 5 mm, thickness of the first aggregate 22: 50 μm to 600 μm, thickness of the second aggregate 23: 50 μm to 600 μm, thickness of the shaft 24: 0.1 mm to 5 mm, number of detachable parts 20 provided on the support body 10: 1 to 300.

[0033] <Buffer section> The buffer section 40 is a flexible and / or elastic member corresponding to at least one of the multiple detachable sections 20. In the present embodiment, the buffer section 40 is disposed between the corresponding detachable section 20 and the back side 12 of the support body 10 in the stacking direction z. When the structural unit 100 is adhered to the surface 200, a pressing force is applied from the action section 30 (described later) toward the detachable section 20, i.e., toward the surface 200, via the buffer section 40, and the adhesive surface 21 a adheres to the surface 200. At this time, the presence of the buffer section 40 allows the adhesive surface 21 a of the detachable section 20 to be sufficiently in close contact with the surface 200.

[0034] The buffer section 40 may be disposed between the corresponding detachable section 20 and the back side 12 of the support body 10 in the stacking direction z, and other positions of the buffer section 40 are not particularly limited. For example, as shown in FIG. 3 , the buffer section 40 may be incorporated inside the support body 10, which is a laminate (between the layers of the laminate, between the opposing side 11 and the back side 12 of the support body 10). The buffer section 40 may also be located between the corresponding detachable section 20 and the opposing side 11 of the support body 10, or between the back side 12 of the support body 10 and the operating section 30. The number of detachable sections 20 corresponding to one buffer section 40 is not particularly limited. For example, as shown in FIG. 12 , one buffer section 40 may correspond to multiple detachable sections 20 (six detachable sections 20 in FIG. 12 ). Alternatively, multiple buffer sections 40 may be provided in one-to-one correspondence with the multiple detachable sections 20, or a single buffer section 40 may be provided in common to all the detachable sections 20.

[0035] The material of the buffer section 40 is not particularly limited as long as it has flexibility and / or elasticity, but examples thereof include resin (polymer) materials such as rubber, foam, and gel, with gel being preferred. Examples of gel include urethane gel and silicone gel. From the viewpoint of achieving higher adhesiveness, the buffer section 40 is preferably made of urethane gel, and preferably has an Asker C hardness of 0 to 15 or 0 to 7.

[0036] The size of the buffer section 40 is not particularly limited, but from the viewpoint of having high adhesiveness, it is preferable that the size (area) be large enough to cover all of the corresponding detachable sections 20 when viewed from the stacking direction z, and the thickness in the stacking direction z is preferably, for example, 0.1 mm to 10 mm, or 0.5 mm to 2 mm.

[0037] <Action Portion> The action portion 30 is disposed opposite the back side 12 of the support body in the stacking direction (z direction). The action portion 30 is a portion that applies (acts on) a force to the multiple detachable portions 20 when adhering the structural unit 100 to the surface 200. From the viewpoint of efficiently transmitting force to the multiple detachable portions 20, the action portion 30 preferably comprises a plate-like body that is disposed so as to cover all of the detachable portions 20 when viewed from the stacking direction (z direction). The material of the action portion 30 (typically, the plate-like body) is not particularly limited, but various plastics (resins, polymers), wood, paper (e.g., cardboard), metal, etc. can be used. Since the action portion 30 is a portion that applies a force from the outside when adhering the structural unit 100 to the surface 200, it is preferably disposed on the outermost side of the structural unit 100 in the stacking direction (z direction) (the position farthest from the surface 200 in the z direction when the structural unit 100 is adhered to the surface 200).

[0038] In the structural unit 100 of this embodiment, the acting portion 30 is an optional member. In a case where the structural unit 100 does not have the acting portion 30, when the structural unit 100 is adhered to the surface 200, for example, the structural unit 100 is pressed from the back side 12 of the support material 10 toward the surface 200.

[0039] <Other Constituent Members> The structural unit 100 of this embodiment may be composed of only the support body 10, the plurality of detachable portions 20, and the buffer portion 40, or may include other members such as the acting member 30 within the scope of the effects of the present invention. For example, a reinforcing material or the like may be provided between the support body 10 and the acting portion 30 to increase the strength of the structural unit 100.

[0040] The structure 1000 of this embodiment includes a plurality of the structure units 100 described above, i.e., two or more. FIGS. 1A, 1B, and 2 show an embodiment in which there are two structure units 100. FIGS. 6A to 6D show an embodiment in which there are two to four structure units 100. The number of structure units 100 is not particularly limited as long as it is two or more, and can be designed appropriately depending on the application of the structure 1000. The number of structure units 100 included in the structure 1000 may be, for example, 20 or more, 20 to 2, 6 to 2, or 2. The configurations, sizes, etc. of the multiple structure units may be the same or different. From the viewpoint of improving the adhesive strength of the structure 1000, it is preferable that the multiple structure units 100 have the same configuration and the same size.

[0041] <Effects of the Structural Unit> The structural unit 100 described above is an assembly of multiple detachable parts 20, and naturally exhibits a higher adhesive strength with respect to the surface 200 than when a single detachable part 20 is used. However, simply increasing the number of detachable parts 20 does not achieve the adhesive strength that should be calculated for the assembly. This is presumably due to variations in the waviness and orientation of the adhesive surfaces 21 a among the detachable parts 20 constituting the assembly, resulting in variations in the adhesive state of the adhesive surfaces 21 a with respect to the surface 200. Based on this presumption, the inventors of the present application conducted extensive research to eliminate the performance degradation of the detachable parts 20 that occurs in the assembly, and as a result, arrived at the structural unit 100 of this embodiment having the above-described configuration. The effects of the structural unit 100 of this embodiment are described below.

[0042] First, the structure unit 100 has the buffer portion 40, which absorbs variations in undulation, orientation, etc. between the multiple adhesive surfaces 21a and also absorbs irregularities (surface roughness) of the surface 200. This reduces variations in the adhesive state of the adhesive surfaces 21a relative to the surface 200, improving adhesive strength.

[0043] In the structure unit 100, the multiple axes 24 are aligned and substantially parallel to one another along the arrangement direction y and fixed to the support 10. This makes it possible to more efficiently suppress variations in waviness, orientation, and the like between the adhesive surfaces 21a. Furthermore, by aligning the detachable parts 20 with directionality, it is possible to align the direction of the force (load direction) applied to the detachable parts 20 during adhesion and detachment (detachment, peeling). By aligning the force direction between the multiple detachable parts 20, the structure unit 100 can exert stronger adhesive force as an assembly of adhesive structures and, at the same time, can be easily detached from the surface 200.

[0044] 2. Connecting Part The connecting part 90 is a long, string-like (tape-like) member that is connected to each of the plurality of structural units 100. The plurality of structural units 100 are connected by bundling the connecting parts 90 with bundling parts 91. The connecting part 90 is connected to, for example, the support body 10 and / or the acting part 30 of each structural unit 100.

[0045] The material of the connecting portion 90 is not particularly limited, and examples thereof include organic materials, inorganic materials, and composite materials thereof. However, a material having appropriate flexibility and / or pliability is preferred so that the structure 1000 can be easily bound at the binding portion 91. A load corresponding to the intended use of the structure 1000 is applied to the connecting portion 90. For example, as shown in FIGS. 1A and 7A to 7G, when the structure 1000 is used to suspend an object M1 from the surface 200, the object M1 is attached to the bound connecting portion 90. For example, as shown in FIGS. 8A to 8G, when the structure 1000 is used to lift an object M2 (adherend), the load of the object M2 is applied to the bound connecting portion 90. Thus, it is preferable to appropriately select a material for the connecting portion 90 that has the strength to withstand a load corresponding to the intended use of the structure 1000.

[0046] Organic materials that can be used for the connecting portion 90 include, but are not limited to, resins. Examples of resins include polyamide resins (e.g., nylon), polyethylene resins, polyester resins such as polyethylene terephthalate (PET), polycarbonate resins, (meth)acrylic resins, epoxy resins, polyurethane resins, polyolefin resins, cellulose derivatives, silicone resins, and polyvinyl alcohol (PVA). The connecting portion 90 can also be made of natural fibers (e.g., animal hair such as cotton, linen, silk, or wool), chemical fibers (e.g., nylon or the resins listed above), or blends of these. Inorganic materials that can be used for the connecting portion 90 include metal wires and metal chains. The connecting portion 90 can be made of a single material or multiple materials.

[0047] The size (width (thickness), length, etc.) of the connecting portion 90 is not particularly limited, and may be designed appropriately depending on the use of the structure 1000.

[0048] The connecting portion 90 may be provided, for example, at an end 100E1 of each structure unit 100 on one side in the arrangement direction y (the side of the shaft 24 in the detachable portion 20 arranged parallel to the arrangement direction y). The end 100E1 is the end downstream in the arrangement direction y in the direction Y1 from the movable end 20b toward the fixed end 20a of the detachable portion 20. As shown in FIGS. 1A and 2 , when the structure 1000 is bonded to the surface 200, the structure units 100 are arranged around the bundling portion 91 with their respective ends 100E1 (ends on one side in the arrangement direction y) where the connecting portions 90 are provided facing the bundling portion 91. This makes it easier to bundling the connecting portions 90. Furthermore, the connecting portion 90 may be provided, for example, at the center of each structure unit 100 in the width direction (x direction). This further reduces the risk of the structure 1000 detaching from the surface 200 when a load is applied to the connecting portion 90 .

[0049] Furthermore, an end of one connecting portion 90 may be connected to an end of another connecting portion 90, or the ends of all connecting portions 90 may be connected. For example, as shown in FIGS. 7A to 7G, when suspending an object M1, a hook or the like for suspending the object M1 may be provided on the connected connecting portions 90. Furthermore, for example, as shown in FIGS. 8A to 8G, when lifting an object M2 (attachment object), a grip portion 92 may be provided on the connected connecting portions 90 to make it easier to lift the object M2. When the connecting portions 90 are connected, multiple structure units 100 are connected via the connecting portions 90 to form a single unit, which has the advantage of making handling easier.

[0050] 3. Binding Section The binding section 91 may have any shape as long as it can bind the connecting sections 90 connected to the plurality of structural units 100 together.

[0051] For example, the bundling portion 91 may be formed by tying the connecting portions 90 together. In this case, the bundling portion 91 is formed by a portion (knot) of a plurality of connecting portions 90. The bundling portion 91 formed by tying the connecting portions 90 together can be easily untied (the knot can be undone), and since the bundling portion 91 is not required as a separate component, the number of parts can be reduced.

[0052] Furthermore, the binding portion 91 may naturally be a separate member from the connecting portion 90. For example, the binding portion 91 may be a long member such as a string, tape, band, wire, or thread, which can be used to bundle and tie the connecting portion 90. The binding portion 91 may also be, for example, a pinch or clip, or may be a member having through holes (for example, one or two) formed therein through which the connecting portion 90 (for example, a string) passes. Examples of members having through holes include cord stoppers (cord locks, cord stoppers, e.g., spring-type) and the like.

[0053] In this embodiment, the binding parts 91 bind the plurality of connecting parts 90 together, thereby preventing the structure 1000 from detaching from the surface 200, and by releasing the binding of the connecting parts 90, the structure 1000 can be easily detached from the surface 200. Therefore, it is preferable that the binding parts 91 are members that can bind the connecting parts 90 together and that can easily release (release) the binding.

[0054] However, for example, when the structure unit 100 includes a detachment knob 93 (see FIGS. 9A to 9D ), the structure 1000 can be detached from the surface 200 without releasing the binding of the connecting portions 90 by applying a load to the structure 1000 via the detachment knob 93 (for example, by pulling the detachment knob 93 in a direction away from the surface 200). Furthermore, depending on the application of the structure 1000, the structure 1000 can also be detached from the surface 200 by destroying (cutting) the binding portions 91 (or the connecting portions 90). Therefore, in this embodiment, the binding portions 91 do not need to have a configuration that allows the binding of the connecting portions 90 to each other to be easily released.

[0055] 4. Others In this embodiment, the structure 1000 may be composed of only the above-mentioned multiple structure units 100, connecting portion 90, and binding portion 91, or may include other components such as a detachment knob 93 and a gripping portion 92, if necessary.

[0056] [Method of Using the Structure] The structure 1000 of this embodiment may be used, for example, by a method including the following steps (see FIG. 5A): By this method of use, the structure 1000 can be adhered to the surface 200 of an object.

[0057] Step S11: With the axis 24 of the detachable part 20 facing a virtual binding point VP set on the surface 200 and the multiple structural units 100 arranged around the virtual binding point VP, the multiple structural units 100 are adhered to the surface 200; and Step S12: Using a binding part 91 to bind the connecting parts 90 connected to the multiple structural units 100 together so that the multiple structural units 100 do not detach from the surface 200.

[0058] <Step S11> First, a plurality of structural units 100 are adhered to the surface 200 of the object. Specifically, the adhesive film 21 of the detachable part 20 is adhered to the surface 200. At this time, the plurality of structural units 100 are arranged around a virtual binding point VP set on the surface 200, with the shaft 24 of the detachable part 20 facing the virtual binding point VP. Therefore, as shown in FIG. 2 , each structural unit 100 is arranged with its end 100E1 on one side of the arrangement direction y (the downstream side in the direction Y1 from the movable end 20b toward the fixed end 20a of the detachable part 20) facing the binding part 91. A connecting part 90 is provided at the end 100E1 of each structural unit 100.

[0059] From the viewpoint of improving the adhesive strength of the structure 1000, it is preferable that the multiple structural units 100 be arranged in a balanced (more even) manner around the virtual bonding point VP. For example, as shown in FIGS. 1A, 1B, and 2, when two structural units 100 are arranged on the same plane, it is preferable that the arrangement direction y (extension direction of axis 24) of each structural unit 100 be close to parallel. Furthermore, for example, when n structural units are arranged on the same plane, the angle formed between the arrangement direction y of one structural unit 100 (referred to as a first structural unit) and the arrangement direction y of the structural unit 100 adjacent to the first structural unit (referred to as a second structural unit) is preferably close to (360 / n) degrees, and may be, for example, (360 / n)±10 degrees. For example, the angle is preferably 180±10 degrees when there are two structural units 100, preferably 120±10 degrees when there are three structural units, and preferably 90±10 degrees when there are four structural units (see FIGS. 6A to 6D).

[0060] Furthermore, the multiple structural units 100 may be in contact with each other at the virtual binding point VP (for example, FIGS. 6A to 6D), or may be spaced apart (for example, FIG. 2). When the multiple structural units 100 are spaced apart, it is preferable that the distances (shortest distances) between the virtual binding point VP and each structural unit 100 are approximately equal.

[0061] The shape of the surface 200 to be adhered is not particularly limited, but a flat surface is preferable from the viewpoint of obtaining stronger adhesive strength. However, by including the buffer portion 40, the structural unit 100 exhibits sufficient adhesive strength even to a surface 200 having a certain degree of unevenness (surface roughness). Furthermore, the surface 200 is not limited to a flat surface as shown in FIGS. 7A and 7B, but may be a curved surface as shown in FIG. 7E. Furthermore, the surfaces 200 on which the structural units 100 are arranged do not have to be the same surface (coplanar). For example, as shown in FIGS. 7F and 7G, multiple structural units 100 may be arranged on different planes. Furthermore, the material of the surface 200 is not particularly limited.

[0062] From the viewpoint of improving the adhesive strength to the surface 200, the plurality of structural units 100 arranged on the surface 200 may be pressed toward the surface 200, if necessary.

[0063] <Step 12> Next, the connecting portions 90 connecting the multiple structure units 100 are bound together by the binding portions 91 so that the multiple structure units 100 do not detach from the surface 200. For example, from the viewpoint of suppressing detachment of the structure units 100, the structure 1000 of this embodiment preferably has the following configuration when binding the connecting portions 90. The binding portions 91 preferably bind the connecting portions 90 on a virtual axis VA that passes through the virtual binding point VP and is parallel to the stacking direction z. The distance between the binding portion 91 and the virtual binding point VP on the surface 200 is preferably short. The binding portion 91 may be in contact with the virtual binding point VP (i.e., the distance (shortest distance) between the binding portion 91 and the virtual binding point VP is 0 (zero)), or may not be in contact. The binding portion 91 may or may not be in contact with each structure unit 100. When a load is applied to the structure 1000 via the connecting portion 90, it is preferable that the angle formed between the direction of extension of the portion 90a of the connecting portion 90 connecting the structure unit 100 and the binding portion 91 and the surface 200 is close to 0° (i.e., the portion 90a and the surface 200 are parallel), for example.

[0064] By adhering the structure 1000 to the surface 200 using the method including steps 11 and 12 described above, it is possible to expand the range of uses of the structure 1000. For example, as shown in FIG. 7 , when the structure 1000 is used to suspend an object M1 from the surface 200, by fastening the connecting portions 90 with the bundling portions 91, it is possible to prevent each structure unit 100 from being subjected to a force in a direction that would easily cause detachment (e.g., θ = 90°), thereby maintaining adhesion to the surface 200. This significantly expands the range of use (here, the range in which the object M1 can be suspended from the surface 200), as shown in FIGS. 7A , 7C , and 7D . Furthermore, the structure 1000 can also be used on a curved surface 200 ( FIG. 7E ), and multiple structure units 100 can be arranged on different surfaces 200 ( FIGS. 7F and 7G ).

[0065] Furthermore, for example, as shown in FIGS. 8A to 8G , when using the structure 1000 to lift an object M2 (adherend), by binding the connecting portions 90 together with the binding portions 91, it is possible to prevent the application of force to each structure unit 100 in a direction that would easily cause detachment (e.g., θ = 90°), thereby maintaining adhesion of the object M2 to the surface 200. This greatly expands the range of use (here, the range in which the object M2 can be lifted relative to the surface 200), as shown in FIGS. 8A , 8C , and 8D . Furthermore, the structure 1000 can also be used on a curved surface 200 ( FIG. 8E ), and multiple structure units 100 can also be used by placing them on different surfaces 200 ( FIGS. 8A and 8B ). In FIGS. 8A to 8G , reference numeral 92 denotes a gripping portion.

[0066] Note that steps S11 and S12 may be performed in this order ( FIG. 5A , step S11 → step S12), or may be performed in the reverse order (step S12 → step S11) shown in FIG. 5B. For example, by binding the connecting parts 90 in advance, it is possible to quickly hang the object M1 using the structure 1000 ( FIGS. 7A to 7G ) or hang (lift) the target object M2 ( FIGS. 8A to 8G ).

[0067] <Step of Detaching (Peeling) Structure from Surface> A method of detaching (peeling, desorbing) the structure 1000 of this embodiment from the surface 200 will be described below. The structure 1000 can be easily detached from the surface 200 by applying a load to each structure unit 100 so that the angle θ (see FIG. 1A ) is, for example, an angle exceeding 20 to 30°. For example, as shown in FIGS. 7B and 8B , by releasing the binding of the connecting parts 90 by the binding parts 91, a load is applied to each structure unit 100 in a direction away from the surface 200 due to the weight of the object M1 or the weight of the target object M2, and each structure unit 100 can be easily detached from the surface 200.

[0068] Furthermore, in the case of a structure in which once the binding portion 91 binds the connecting portion 90, the binding cannot be undone, the structure 1000 can be detached from the surface 200 by destroying (cutting) the binding portion 91 (or the connecting portion 90).

[0069] 9A to 9D , the structure unit 100 of this embodiment may further include a peeling tab (peeling pull portion) 93, in which case the structure 1000 can be detached from the surface 200 without loosening the binding of the connecting portions 90. For example, the structure unit 100 can be detached from the surface 200 by pulling the peeling tab 93 in a direction away from the surface 200. For example, by providing the peeling tab 93, it is possible to repeatedly adhere and detach the structure 1000 to and from the surface 200 without loosening the binding of the connecting portions 90.

[0070] The peeling tab 93 may be provided, for example, on the support 10 and / or the action portion 30. Furthermore, the peeling tab 93 may be provided, for example, on an end 100E2 of each structural unit 100 on the other side in the arrangement direction y (on the adhesive film 21 side of the detachable portion 20 arranged parallel to the arrangement direction y). The end 100E2 is an end on the upstream side in the arrangement direction y in the direction Y1 from the movable end 20b toward the fixed end 20a of the detachable portion 20. The end 100E2 is an end on the opposite side in the arrangement direction y to the end 100E1 at which the connecting portion 90 is provided.

[0071] 9A to 9D, a peeling tab 93 may be provided for each structure unit 100. Alternatively, at least two of the plurality of structure units 100 may be provided with a detachment tab 93, and these at least two detachment tabs 93 may be connected to each other. Alternatively, all of the structure units 100 may be provided with a detachment tab 93, and all of these detachment tabs 93 may be connected to each other. By applying a load to the connected detachment tabs 93, it is possible to peel the plurality of structure units 100 from the surface 200 simultaneously with a single operation.

[0072] The material and size (width (thickness), length, etc.) of the peeling tab 93 are not particularly limited, and may be selected and designed appropriately depending on the application of the structure 1000.

[0073] [Method for manufacturing structure] The method for manufacturing the structure 1000 is not particularly limited. For example, the structure 1000 may be manufactured by preparing a plurality of structure units 100, connecting portions 90, binding portions 91, and other members as necessary, and combining them using a conventionally known method. The constituent members of the structure 1000 may be self-manufactured or commercially available products may be used. An example of a method for manufacturing the structure unit 100 will be described below.

[0074] <Method of Manufacturing Structural Unit> The method of manufacturing the structural unit 100 is not particularly limited, but may include, for example, a step S(I) of manufacturing a plurality of detachable parts 20 by utilizing the surface tension of a pressure-sensitive adhesive, and a step S(II) of fixing the manufactured plurality of detachable parts to the support body 10, as shown in Fig. 10. For example, the structural unit 100 may be manufactured by a manufacturing method including the following steps S1 to S4 (see Figs. 11A to 14). Steps S1 to S3 are detachable part manufacturing steps (S(I) in Fig. 10), and step S4 is a fixing step of the detachable parts 10 (S(II) in Fig. 10).

[0075] Step S1: fixing the first ends 22a of at least two first aggregates 22, each having a first end 22a and a second end 22b, to one surface of a temporary support 70 at a predetermined distance from each other to obtain an aggregate-attached temporary support 71; Step S2: immersing at least the first aggregates in a composition containing a pressure-sensitive adhesive; Step S3: removing the aggregate-attached temporary support 71 from the composition, and obtaining a detachable part 20 having a shaft 24 formed by the at least two first aggregates 22 coalescing together due to the surface tension of the composition, and an adhesive film 21 made of pressure-sensitive adhesive supported by the first aggregates 22; and Step S4: separating the detachable part 20 from the temporary support 70 and then fixing it to the support 10.

[0076] <Steps S1 to S3> The detachable portion 20 can be manufactured using a method similar to that disclosed in Patent Document 1. This manufacturing method was inspired by the process of setae formation in fly pupae. After forming a framework with a first aggregate 22 (typically, fiber), a composition is filled in, and the resulting surface tension can be used to autonomously create a structure. This method is advantageous in that it allows for the simple creation of structures with complex shapes at room temperature and pressure, and also allows for the creation of structures at low cost. The contents of Patent Document 1 are incorporated herein by reference. Figures 11A to 11E show a set of diagrams, indicated by arrows, illustrating the transition from the state after step S1 to the state after step S3. Figures 11B to 11D show two configuration examples: one in which the adhesive film 21 is positioned close to the temporary support 70, and the other in which the adhesive film 21 is positioned far from the temporary support 70. Photographs of the configuration examples in Figures 11C and 11D show the state after step S3.

[0077] In the temporary support 71, multiple first aggregates 22 may be connected together by one or more second aggregates 23 (FIGS. 11B to 11E). Adding the second aggregates 23 can prevent the first aggregates 22 near the second aggregates 23 from coalescing. As a result, it is possible to form an adhesive film 21 with a complex shape, such as a diamond shape (FIGS. 11C and 11E) or a heart shape (FIG. 11D), while also increasing the strength of the adhesive film 21. Furthermore, as can be seen from a comparison of FIG. 11A and FIG. 11B, by providing the second aggregates 23 to prevent the first aggregates 22 from coalescing together, the adhesive film 21 can be formed at a position farther away from the temporary support 70. This can prevent contact between the temporary support 70 and a composition containing a pressure-sensitive adhesive, and contamination of the composition due to contact.

[0078] Furthermore, by adjusting the placement location of the second aggregates 23, it is also possible to form multiple adhesive films 21 on the same first aggregates 22 extending from the temporary support 70. For example, as shown in Fig. 11E, aggregate-attached temporary support 71 is formed by providing aggregates 23A and 23B of second aggregates 23 at a distance from each other. By immersing this aggregate-attached temporary support 71 in a composition containing a pressure-sensitive adhesive, the surface tension of the composition causes the first aggregates 22 to coalesce between aggregates 23A and 23B as well, forming axes 24. As a result, multiple adhesive films 21 (two in Fig. 11E) are obtained.

[0079] <Step S4> There are no particular limitations on the method for separating the detachable part 20 from the temporary support 70. There are also no particular limitations on the method for fixing the detachable part 20 to the support 10, but one example will be described below (see FIGS. 12 to 14).

[0080] First, as shown in FIG. 12 , adhesive or pressure-sensitive adhesive is applied to one surface of the first support material 13, and multiple detachable units 20 are aligned and temporarily fixed thereon. At this time, the adhesive surfaces 21 a of the multiple adhesive films 21 are oriented parallel to one surface of the first support material 13. The axes 24 of the multiple detachable units 20 are aligned parallel to one another. Next, the first support material 13 with the axes 24 temporarily fixed thereto is folded multiple times together with the axes 24 to obtain a first unit 51. Next, a buffer portion (typically, gel) 40 is provided on one surface of the second support material 14 to obtain a second unit 52. The other surface of the first support material 13 (the surface without the detachable units 20) is opposed to the other surface of the second support material 14 (the surface without the buffer portion 40), and the first unit 51 and the second unit 52 are bonded together to produce a third unit 53 (see FIG. 13 ). A plurality (a desired number) of the third units 53 are produced in accordance with the intended use of the structural unit 100 .

[0081] As shown in FIG. 14 , a third support member 15 is prepared, and multiple third units 53 are attached to one side of the third support member 15, with their adhesive surfaces 21 a arranged so as not to overlap. This results in a support member 54 with a detachable portion. The materials for the first, second, and third support members 13-15 are not particularly limited. For example, using cloth makes it easy to secure the detachable portion 20 and connect the support members 13-15 to each other by sewing. In this embodiment, the support member 10 is a composite (laminate) of the first, second, and third support members 13-15, with the buffer portion 40 positioned inside the support member 10 (between the second support member 14 and the third support member 15) and the shaft 24 of the detachable portion 20 positioned inside the support member 10 (folded together with the first support member 13).

[0082] The working portion 30 is attached to the back side 12 of the support body 10 of the support body 54 with the detachable portion, thereby obtaining the structural unit 100 of this embodiment.

[0083] The structure 1000 of this embodiment is not limited to the configuration described above. For example, the structure may be one of the modified examples described below (e.g., the structure 2000 in FIGS. 15A and 15B, and the structure 3000 in FIGS. 16A and 16C). The modified examples below achieve the same effects as the structure 1000 described above. Note that in the description of the modified examples below, structures (components) whose description is omitted are the same as those of the structure 1000 described above.

[0084] 15A and 15B , a structure 2000 of this modification has a plate-shaped binding portion 81. The binding portion 81 may have a size that is large enough to cover all of the plurality of structure units 110 when viewed from the z direction when the structure 2000 is placed on (or adhered to) a flat surface 200. When the structure 2000 is adhered to the surface 200, all of the plurality of structure units 110 can be pressed against the surface 200 simultaneously via the plate-shaped binding portion 81, which is efficient.

[0085] The binding portions 81 of the structure 2000 are formed with through-holes 82 for connection through the connecting portions 90. The through-holes 82 may be provided with a mechanism (e.g., a spring mechanism) for binding (fixing) the connecting portions 90 together. Furthermore, in the structure unit 100 described above, the buffer portions 40 are disposed between the detachable portion 20 corresponding to the buffer portions 40 and the back side 12 of the support body 10 in the stacking direction z (see FIG. 3 ). However, in the structure unit 110 of this modified example, the buffer portions 40 may be disposed between the support body 10 and the binding portions 81 in the stacking direction z. Furthermore, the buffer portions 40 do not have to be bonded to the support body 10. For example, as shown in FIG. 15 , the buffer portions 40 may be bonded to the binding portions 81.

[0086] [Variation 2] The structural unit 100 included in the structural body 1000 described above includes a plurality of detachable parts 20 (see FIG. 2), but this embodiment is not limited to this. For example, each of the plurality of structural units 120 included in the structural body 3000 of this variation shown in FIGS. 16A and 16C is composed of one detachable part 20. In this case, the structural body unit 120 may or may not include components other than the detachable part 20, such as a support body 10, an action part 30, a buffer part 40, etc. FIGS. 16A and 16C show an embodiment in which the structural body unit 120 is composed of only one detachable part 20. In this variation, the connecting part 94 of the structural body 3000 is composed of the shaft 24 of the detachable part 20.

[0087] Compared to an embodiment having multiple detachable parts 20, the embodiment of this modified example having one detachable part 20 tends to have a lower adhesive strength, but this does not pose a practical problem depending on the application of the structure 3000. Also, the adhesive strength can be improved by increasing the size of the detachable part 20 itself (for example, by increasing the adhesive surface 21a of the detachable film 21). The structure 3000 of this modified example has a simple structure, which allows for reduced manufacturing costs and time and is easy to use.

[0088] 17A to 17H show the structure 3000 adhered to the surface 200. In FIGS. 17A to 17H, n (2 to 6) structure units 120 (detachable portions 20) are arranged on the same plane. Each structure unit 120 is composed of one detachable portion 20 having a triangular ( FIGS. 17A to 17D ) or diamond-shaped ( FIGS. 17E to 17H ) adhesive film 21. In the structure 3000, similar to the structure 1000 described above (see FIGS. 6A to 6D ), the angle formed between the arrangement direction y of one structure unit 120 (referred to as a first structure unit) and the arrangement direction y of the structure unit 100 (referred to as a second structure unit) adjacent to the first structure unit is preferably close to (360 / n) degrees, and may be, for example, (360 / n)±10 degrees. For example, the angle is preferably 180±10° when there are two structural units 120, 120±10° when there are three structural units, 90±10° when there are four structural units, and 30±10° when there are six structural units.

[0089] [Variation 3] The structure 1000 of this embodiment may be configured such that the connecting portions 90 are previously bound with the binding portions 91. That is, the structure 1000 of this variation can be manufactured by preparing a plurality of structure units 100, connecting portions 90, binding portions 91, and other components as necessary, assembling them using a conventionally known method, and then binding the connecting portions 90 with the binding portions 91. Because the connecting portions 90 are already bound, in a method of using the structure 1000 of this variation, the binding step of the connecting portions 90 (step S12 in FIG. 5B ) can be omitted, and the structure units 100 can be directly bonded to the surface 200 (step S11 in FIG. 5B ). In this variation, the binding portions 91 do not need to be configured to allow the binding of the connecting portions 90 to each other. In this variation, bonding and detachment may be repeated without unbinding the connecting portions 90. In this case, the structure 1000 may have peel tabs 93 to facilitate detachment (FIGS. 9A-9D).

[0090] The above-described embodiment and modified examples may be combined with each other as long as they do not exclude each other. For example, in modified example 3, similar to modified example 2, the binding portion 81 may be a plate-shaped body.

[0091] [Use of Structure] The structure 1000 of the present embodiment (including modified structures 2000, 3000, etc.) described above can be attached and detached to various locations, and can be used as a suspender for suspending an object from a surface (wall, floor, ceiling, etc.) (see FIGS. 7A to 7G), and can also be used as a suspender for suspending an object (for example, a carrying aid) (see FIGS. 8A to 8G).

[0092] The structure 1000 of this embodiment can be used as a fixture for temporarily fixing an object to a fixing surface. Examples of fixing surfaces include walls (exterior walls, interior walls), floors, ceilings, etc. of buildings, as well as the exterior surfaces (body surfaces, glass surfaces) and interior surfaces of automobiles. The object to be fixed is not particularly limited, and examples include sensors, lights, cameras, controllers, wallpaper, posters, panels, boards, etc. The structure 1000 can also be used as a fixture for temporarily parking a small unmanned aerial vehicle such as a drone or a radio-controlled aircraft on a fixing surface (wall, floor, ceiling, etc.).

[0093] The fixture of this embodiment may be used by attaching an object (e.g., a sensor, etc.) to be fixed to the connecting portion 90 of the structure 1000, so that the structure unit 100 can be attached and detached to a fixing surface (e.g., a wall), or by fixing the connecting portion 90 of the structure 1000 to a fixing surface (e.g., a wall), so that the structure unit 100 can be attached and detached to an object (e.g., a sensor, etc.). Furthermore, the fixture of this embodiment may be configured to include a plurality of structures 1000, with their connecting portions 90 connected together. In this case, the structure unit 100 of one structure 1000 may be used to be attached and detached to a fixing surface (e.g., a wall), and another structure unit 100 may be used to be attached and detached to an object (e.g., a sensor, etc.).

[0094] Furthermore, the structure 1000 of this embodiment can be used, for example, as a pickup tool that grasps, moves, and releases an object. Examples of objects to be picked up include slippery and difficult-to-grasp objects and easily scratched objects, such as glass plates, glass spheres, lenses, pearls, and beads. An example of a pickup tool of this embodiment is a pickup robot having the structure 1000 attached to the tip that touches the object. The structure 1000 is preferably installed at the tip of the pickup robot with the connecting portions 90 previously bound by the binding portions 91. Adhesion and detachment may be repeated without unbinding the connecting portions 90. In this case, the structure 1000 may have a peeling knob 93 to facilitate detachment ( FIG. 9 ).

[0095] Furthermore, the structure 1000 of this embodiment can be used in welfare products such as self-help devices, assistive devices, and prosthetic hands for the elderly and disabled. For example, a user who has difficulty grasping an object due to a hand disability or weak grip strength can use a welfare product (self-help device, assistive device, prosthetic hand, etc.) with the structure 1000 attached to the tip, making it easier to grasp the object. The structure 1000 is preferably installed at the tip of the welfare product with the connecting portion 90 previously fastened with the fastening portion 91, and adhesion and detachment may be repeated without unfastening the connecting portion 90. In this case, the structure 1000 may have a peeling tab 93 to facilitate detachment ( FIG. 9 ).

[0096] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0097] 16A to 16D, structure 3000 was fabricated, which included two structure units 120 each consisting of one detachable portion 20. The experiment was performed using a curved glass surface (the surface of a screw bottle) as the surface of the object to be detached.

[0098] First, as shown in FIG. 11B , the upper ends (first ends 22 a) of 25 first aggregates 22 were fixed to one surface of a temporary support 70 at a predetermined distance from each other, and the first aggregates 22 were connected by five second aggregates 23. Five sets of the same structure (25 first aggregates 22 x 5 sets = 125 aggregates in total) were provided to produce a temporary support 71 with aggregates. Paper (manufactured by Kokuyo Co., Ltd., Tuck Index, thickness 0.14 mm, size 29 mm x 23 mm) was used as the temporary support 70, and nylon thread (fiber) with a diameter of 0.06 mm and a length of 13 cm was used as the first aggregates 22 and second aggregates 23. The spacing between the first aggregates 22 (the spacing between the first ends 22 a) in each set (25 aggregates) was 0.05 mm to 2 mm, and the spacing between adjacent sets was 10 mm to 20 mm.

[0099] Next, an acrylic resin solution was used as the pressure-sensitive adhesive-containing composition. The first aggregates 22 and second aggregates 23 of the aggregate-attached temporary support 71 were immersed in the composition and immediately removed. Care was taken to prevent the temporary support 70 from coming into contact with the composition. Five detachable portions 20 were formed on the removed aggregate-attached temporary support 71, each having a shaft 24 formed by the 25 first aggregates 22 coalescing together due to the surface tension of the composition, and an adhesive film 21 (triangle) made of pressure-sensitive adhesive supported by the first aggregates 22 and second aggregates 23. This was dried at 50°C for 30 minutes to 2 days to harden the acrylic resin. The five detachable portions 20 were then cut off from the temporary support 70, and excess nylon fibers (first aggregates 22) were also cut off. The resulting detachable portions 20 had the following dimensions: Area of ​​adhesive surface (triangle) 21a: approximately 74 mm ２ (Width (base) 7 mm x length (height) 18 mm x 1 / 2), thickness of adhesive film 21: 0.3 mm to 2 mm, thickness of shaft 24: 0.3 mm to 2 mm.

[0100] Of the five detachable parts 20 produced, two detachable parts 20 (structure 3000) were used, and their axes 24 (connecting parts 94) were tied together near the base (near the adhesive film 21) and bundled together.

[0101] A weight (resin liquid) was placed in a glass screw bottle (capacity 50 mL) to make the total weight 79 g. The adhesive film 21 of the structure 3000 (two detachable parts 20) with the shaft 24 (connecting part 94) bound together was brought into contact with the surface 200 (glass surface) of the screw bottle and gently pressed against the surface 200 to adhere. In this state, the shaft 24 (connecting part 94) of the structure 3000 (two detachable parts 20) was grasped, and the screw bottle was successfully lifted (see the photograph in Figure 16B). Furthermore, a centrifugal force load was applied by rotating the screw bottle around the point where the shaft 24 (connecting part 94) was gripped as the center of rotation. Even when rotated, the structure 3000 did not detach from the screw bottle.

[0102] Next, the connected shafts 24 (connecting portions 94) of the structure 3000 (two detachable portions 20) were untied (released). By holding the shafts 24 of each detachable portion 20 and applying force to roll up the adhesive film 21 from the base (shaft 24 side) from the surface 200 of the screw bottle, the detachable portion 20 could be easily detached from the surface 200.

[0103] Furthermore, the above-described structure 3000 (two detachable parts 20) was adhered to the target surface 200 (curved glass surface), and the object was lifted, rotated, and detached 200 times. During the lifting and rotation of the object, the structure 3000 did not unintentionally fall off (detach) from the object, demonstrating sufficient adhesive strength. On the other hand, intentional detachment of the structure 3000 was easy, and no damage or dirt was left on the surface 200 after detachment. This experiment confirmed that the structure 3000 exhibits good adhesion and detachability to curved glass surfaces.

[0104] [Experiment 2] Using the structure 3000 (two detachable parts 20) produced in Experiment 1, attachment / detachment experiments were conducted on various types of surfaces 200. Seven types of surfaces were prepared as the surfaces 200: glass, silicon (Si), concrete, marble, wood, wallpaper (PVC: polyvinyl chloride), and plastered wall.

[0105] First, the following experiment was conducted on a glass plate. As in Experiment 1, the axes 24 (connecting portions 94) of the structure 3000 were tied together near their bases and bonded to the surface (glass surface) of the glass plate. In this state, a peel strength test was conducted in which the tied axes 24 (connecting portions 94) of the structure 3000 were pulled at a 90-degree angle relative to the glass surface. The peel strength was 6.14 N. This was approximately 10 times stronger than when a similar test was conducted using a single detachable portion 20. Next, the tied axes 24 (connecting portions 94) of the structure 3000 (two detachable portions 20) were untied (untied), and the structure 3000 could be easily detached from the glass surface. Furthermore, the structure 3000 was repeatedly bonded to and detached from the glass surface 200 times. During bonding of the object, the structure 3000 did not unintentionally detach from the glass surface, demonstrating sufficient adhesive strength. On the other hand, it was easy to intentionally detach the structure 3000, and no damage or stains were left on the glass surface after detachment.

[0106] Similar experiments (adhesion and detachment of structure 3000) were conducted on six other types of surfaces (silicon (Si), concrete, marble, wood, wallpaper, and plaster wall) instead of the glass surface, and good results similar to those obtained with the glass surface were obtained. The results of this experiment confirmed that structure 3000 exhibits good adhesion and detachment properties not only on flat, planar surfaces but also on uneven surfaces.

[0107] The structure of the present invention can be attached and detached to various locations, and can be used as, for example, a hanging device, a fixing device, a pick-up device, a welfare product, etc.

[0108] 10 Support 11 Opposite side 12 Back side 13 First support material 14 Second support material 15 Third support material 20 Detachable portion 20a Fixed end 20b Movable end 21 Adhesive film 21a Adhesive surface 22, 22A, 22B First aggregate 22a First end 22b Second end 23 Second aggregate 24 Shaft 30 Action portion 40 Buffer portion 51 First unit 52 Second unit 53 Third unit 54 Support with detachable portion 70 Temporary support 71 Temporary support with aggregate 82 Through hole 90, 94 Connecting portion 91, 81 Binding portion 92 Grip portion 93 Detachment knob 100, 110, 130 Structural unit 100E1 End portion on one side in arrangement direction y 100E2 End on the other side in the arrangement direction y 200 Surface 1000, 2000, 3000 Structure z Stacking direction y Arrangement direction x Width direction F1 Direction of force Y1 Direction from the movable end to the fixed end when the detachable part is adhered to the target surface P1 Predetermined position in the arrangement direction M1 Object M2 Target object VP Virtual bonding point VA Virtual axis

Claims

1. A structure that is detachable from the surface of an object, comprising: a plurality of structural units that are detachable from the surface of the object; connecting portions connected to each of the plurality of structural units; and a binding portion configured to bind the connecting portions connected to the plurality of structural units together so that the plurality of structural units do not detach from the surface when the structure is adhered to the surface, wherein each of the plurality of structural units has at least one detachable portion, and the detachable portion includes a shaft and an adhesive film provided on the tip of the shaft.

2. The structure according to claim 1, wherein the binding portion is formed by connecting the connecting portions that connect the plurality of structural units together.

3. The structure according to claim 1, wherein the binding portion is a separate member from the connecting portion.

4. The structure according to any one of claims 1 to 3, wherein at least one of the plurality of structural units is further provided with a detachment tab.

5. The structure according to claim 4, wherein at least two of said plurality of structural units are provided with said detachment knobs, and said detachment knobs are connected to each other.

6. The structure according to any one of claims 1 to 5, wherein the structure comprises 2 to 6 of the structural units.

7. A structure according to any one of claims 1 to 6, wherein each of the plurality of structural units comprises a support having an opposing side that is arranged opposite to the surface when adhered to the surface, and a back side located opposite the opposing side in a stacking direction intersecting the surface; a plurality of detachable parts supported on the opposing side of the support and detachable to the surface; and a buffer part corresponding to at least one of the plurality of detachable parts and arranged between the corresponding at least one detachable part and the back side of the support in the stacking direction, wherein each of the plurality of detachable parts is arranged with the axis facing one side in an arrangement direction perpendicular to the stacking direction and the adhesive film facing the other side, one side in the arrangement direction is fixed to the support to form a fixed end, and the other side in the arrangement direction forms a movable end configured to be movable in a direction away from the support with the fixed end as a fulcrum.

8. The structure according to claim 7, wherein the connecting portion is connected to an end portion on one side in the arrangement direction in each of the plurality of structural units.

9. A structure according to any one of claims 1 to 6, wherein each of the plurality of structural units is constituted by one of the detachable parts, and the axis of the detachable part constitutes the connecting part.

10. A structure as claimed in any one of claims 1 to 9, wherein in the detachable portion, the axis is formed by a fused portion of a plurality of first aggregates, and the adhesive film is supported by non-fused portions of the plurality of first aggregates.

11. The structure according to any one of claims 1 to 10, wherein the connecting portions are bound together by the binding portions.

12. A suspension device comprising a structure according to any one of claims 1 to 11.

13. A fixture comprising a structure according to any one of claims 1 to 11.

14. A pick-up tool comprising a structure according to any one of claims 1 to 11.

15. A welfare product comprising the structure according to any one of claims 1 to 11.

16. A method of using a structure according to any one of claims 1 to 10, comprising: adhering the plurality of structure units to the surface with the axial side of the detachable part facing a virtual binding point set on the surface and arranging the plurality of structure units around the virtual binding point; and binding the connecting parts connected to the plurality of structure units together with the binding part so that the plurality of structure units do not detach from the surface.

Images