JP6598228B1 - 鋲 - Google Patents

Abstract

A thumbtack in which a needle is difficult to come off from a wall surface is provided. SOLUTION: A head 1 and a needle portion 3 having a plurality of needles 2 are provided. The head portion 1 has a flat surface portion 10 on one surface. Each needle 2 has a body portion 20 and a tip portion 24. And the head portion 20 of each needle has a prismatic shape, and the distal end portion 24 of each needle 2 is It is a sharp shape comprising three planes 21, 22, and 23, and the sharp shape is a position where the equilateral triangular pyramid shape coincides with the longitudinal center axis of the equilateral triangular pyramid shape and the longitudinal axis of the trunk portion 20. From the above, the apex of the regular triangular pyramid and the corner of the trunk portion 20 are inclined to be in a predetermined direction, and the predetermined direction is a regular triangular pyramid-shaped ridge line including the apex and a corner The angle formed by the side of the body 20 including the angle increases, and the angle is increased by a predetermined angle due to the inclination. Tack 100, wherein the door. [Selection] Figure 1

Description

  The present invention relates to a bag.

Conventionally, in order to fix an article, a hook used by inserting a needle part into a wall surface or the like has been required to be difficult to come off from the wall surface.
Patent Document 1 describes the invention of a thumbtack in which a plurality of needles are provided on a disk and the needles are expanded in the wall surface. Full expansion at the edge was difficult.

JP 2003-226097 A

  In view of the fact that it is difficult to sufficiently expand the proximal end portion of the needle, the needle is likely to come off from the wall surface. The purpose is to provide difficult kites.

  The scissors according to claim 1 of the present invention include a head portion and a needle portion having a plurality of needles, and the head portion has a flat portion on one surface, and each needle includes a trunk portion, a tip end, and a tip portion. Each of the needles has a prismatic shape, and the tip of each needle is It is a sharp shape consisting of three planes, and the sharp shape is such that the regular triangular pyramid shape is formed from the position where the longitudinal central axis of the regular triangular pyramid shape coincides with the longitudinal central axis of the trunk portion. One of the apexes of the pyramid shape and one of the corners of the body portion are in agreement with each other and are inclined in a predetermined direction, and the predetermined direction is the ridge line of the regular triangular pyramid shape including the apex The angle formed by the side of the body including the corner is increased, and the angle of the corner is determined by the inclination. Characterized in that it only angular increment.

A wrinkle according to claim 2 of the present invention is the wrinkle according to claim 1, characterized in that the increment of the angle of the angle is greater than 0 degree and less than 17.6 degrees.
It is characterized by that.

  According to a third aspect of the present invention, the scissors according to claim 3 are the scissors according to claim 1, wherein the regular triangular pyramid shape is a regular tetrahedron, and the base angle of the side surface of the regular triangular shape in the regular triangular pyramid shape is 53 degrees or more. 70.5 degrees or less.

  According to the invention described in any one of claims 1 to 3 of the present invention, the scissors include a head portion and a needle portion having a plurality of needles, and the tip portion of each needle is formed from three planes. Since each of the needles included in the needle portion is inserted into the wall surface, the inside of the wall surface becomes a wall surface, respectively, since the above-mentioned sharp shape is a regular triangular pyramid shape inclined in a predetermined direction. A wall insertion space that is substantially perpendicular to the wall surface, is substantially perpendicular to the wall surface, has a slight width in a direction perpendicular to the wall surface, and has the same width as the needle in a direction parallel to the wall surface, Thereafter, each needle bends by receiving a force from the wall surface, and tilts obliquely in a direction away from the central axis in the vertical direction of the head 1 and moves straight in the wall surface. The direction of inclination is an acute angle formed by a reference axis that is orthogonal to the central axis in the vertical direction of the head and parallel to the wall surface, and the central axis in the longitudinal direction of the tip of the needle is a predetermined angle. Direction. Therefore, the needle portion is expanded from the distal end to the proximal end portion within the wall surface. Therefore, the scissors of the present invention can sufficiently expand the proximal end portion of the needle and make it difficult for the needle to come off the wall surface.

BRIEF DESCRIPTION OF THE DRAWINGS (a) is a perspective view, (b) is an enlarged view of the front-end | tip of a needle part, (c) is an enlarged view of the front-end | tip part of one needle | hook according to embodiment of this invention. (A) of the bag which concerns on embodiment of this invention is a top view, (b) is a side view. It is explanatory drawing of the shape of the front-end | tip part of the needle | hook which concerns on embodiment of this invention. It is explanatory drawing of a motion when the needle | hook concerning embodiment of this invention is inserted in the wall surface.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, upper and lower are assumed to be as shown in FIG. Although the use place and use of the bag of the present invention are not particularly limited, the bag according to the present embodiment is used for sticking a poster or the like to a wall surface, and as shown in FIG. It comprises a part 1 and a needle part 3 having three needles 2, 2, 2. The head portion 1 and the needle portion 3 are integrated, and the lower end of the proximal end portion 30 of the needle portion 3 is concealed inside the head portion 1. The needle portion 3 has elasticity and is made of a metal material or a resin material. The head 1 and the needle 3 are manufactured from the same metal plate or resin plate.

  As shown in FIG. 2, the head 1 has a substantially circular shape in plan view and a substantially elliptical shape in side view. The head 1 has a flat portion 10 on one surface. From the center of the flat surface portion 10 of the head 1, the needles 2, 2, 2 are erected in close contact with the flat surface portion 10 perpendicularly.

  As shown in FIGS. 1B and 1C, the needles 2, 2, and 2 of the needle portion 3 each have a trunk portion 20 and a tip portion 24, and the tip portion 24 is formed with the inner surface 21. The outer surface 22 and 23 are sharp. The body portion 20 is a portion from the lower side than the distal end portion 24 of the needle 2 to the proximal end of the needle 2 and has a prismatic shape. The inner side surface 21 and the outer side surfaces 22 and 23 are flat surfaces and each have a substantially rectangular shape.

  Next, the shape of the distal end portion 24 of the needle 2 will be described. The tip portion 24 of the needle 2 is sharp, and the sharp shape is a regular triangular pyramid shape T having triangular side surfaces S1, S2, S3 and a bottom surface S4 having a regular triangular shape as shown in FIG. Is inclined in a predetermined direction by incrementing a predetermined angle. In the following description of the inclination of the regular triangular pyramid shape T and in FIGS. 3A, 3 </ b> B, and 3 </ b> C, the body portion 20 of the needle 2 is connected to the distal end portion of the needle 2 for the purpose of simplifying the description. 24 and a separate rectangular column. In the original embodiment, the body 20 of the needle 2 is integral with the tip 24 of the needle 2 as shown in FIGS. 1, 2, 3 (d) and 4.

  As shown in FIG. 3A, the sharpened shape has a regular triangular pyramid shape T in which the longitudinal central axis CT of the regular triangular pyramid T coincides with the longitudinal central axis C <b> 2 of the trunk portion 20. From the position, as shown in FIG. 3 (b), the apex V2 of the regular triangular pyramid shape T and the corner portion 20c of the trunk portion 20 are kept in alignment and tilted in the predetermined direction. In other words, as shown in FIGS. 3 (a) and 3 (b), the sharp shape is orthogonal to the perpendicular line PT including the vertex V2 of the bottom surface S4 of the regular triangular pyramid shape T, and the vertex V2 of the regular triangular pyramid shape T. The equilateral triangular pyramid shape T is rotated in the predetermined direction by an increment of the predetermined angle around the axis of the axis line R0.

  The predetermined direction is, as shown in FIGS. 3A and 3B, a ridge line LT of the regular triangular pyramid shape T including the vertex V2 and a side L20c of the trunk portion 20 including the corner portion 20c. This is the direction in which the formed angle θ increases. The increment of the predetermined angle is an increment angle of the angle θ before and after the inclination or rotation of the regular triangular pyramid shape T, and the increment angle is greater than 0 degree and less than 17.6 degrees. is there. When the increment angle is 17.6 degrees or more, the needle 2 is curved and expanded in the wall surface.

  On the other hand, FIG. 3C is a plan view of the regular triangular pyramid shape T before and after the inclination or rotation. The apex V2 of the regular triangular pyramid shape T and the corner 20c of the body 20 of the needle 2 overlap in plan view both before and after the tilt or the rotation, and the apex V4 of the regular triangular pyramid shape T It overlaps with the ridge line LT of the pyramid shape T in plan view.

  The body 20 of the needle 2 has been described as a rectangular column separate from the tip 24 of the needle 2 for the purpose of simplifying the description so far, but in the original embodiment, it is shown in FIG. As described above, the body portion 20 of the needle 2 is integral with the distal end portion 24 of the needle 2. As shown in FIG. 3D, the inner side surface 21 is flush with the triangular side surface S1 after the inclination or rotation of the regular triangular pyramid shape T. Similarly, as shown in FIG. 3D, the outer side surfaces 22 and 23 are flush with the triangular side surfaces S2 and S3 after the inclination or rotation of the regular triangular pyramid shape T, respectively.

  Next, the movement of the needle 2 when the needle portion 3 is inserted into the wall surface will be described. Here, it is described that the needle 2 is inserted upward into the wall surface W of the ceiling. As shown in FIG. 4A, the needles 2 are erected so as to be in contact with each other at the corners 20 a of the body portions 20.

  First, the force applied to the distal end portion 24 of the needle 2 from within the wall surface W will be described. As shown in FIG. 4B, when the needle 2 is viewed in plan, the angle formed by the force P1 applied to the inner surface 21 and the forces P2 and P3 applied to the outer surfaces 22 and 23 from the wall surface W is 120 degrees. It is. However, in FIG. 4, each arrow indicating a force is for simplifying the explanation, and roughly represents the magnitude and direction of the force.

  Based on FIG. 4B, the force applied to the distal end portion 24 of the needle 2 from the wall surface W in the plan view of the needle 2 will be described. In a plan view, the portion of the force P2 in the direction parallel to the direction of the force P1 is the force P21, and the component in the direction perpendicular to the direction of the force P1 and parallel to the force P3 is the force P23. It is. Similarly, in a plan view, the component of the force P3 in the direction parallel to the direction of the force P1 is the force P31, the component in the direction orthogonal to the direction of the force P1 and parallel to the force P2. Is the force P32. In the plan view, the force P23 and the force P32 are in a balanced relationship.

  On the other hand, in the side view of the needle 2, as shown in FIG. 4C, the force P <b> 1 applied to the inner surface 21 from the inside of the wall surface W is slightly downward, and the forces P <b> 2 and P <b> 3 applied to the outer surfaces 22 and 23. Is substantially horizontal.

  Next, the force applied from the needle 2 to the wall surface W and the movement of the needle 2 in the wall surface W when the needle 2 is inserted into the wall surface W will be described. As shown in FIG. 4D, when the needle 2 is inserted perpendicularly to the wall surface W, a force P <b> 0 for inserting the needle 2 into the wall surface W is applied from the needle 2 into the wall surface W. Therefore, the needle 2 goes straight through the wall surface W perpendicularly to the wall surface W. A wall insertion space SP is formed in the wall surface W by the straight advance of the needle 2. The wall surface insertion space SP is a space having a slight width in a direction orthogonal to the wall surface W and the same width as the needle 2 in a direction parallel to the wall surface W.

  The movement of the needle 2 in the wall surface W after the wall surface insertion space SP is formed will be described. As shown in FIGS. 4E and 4F, after the wall surface insertion space SP is formed, the needle 2 receives the force from the inside of the wall surface W and bends, and the vertical center axis C1 of the head 1 is obtained. The reference axis RW that is inclined obliquely in the direction away from the head, that is, perpendicular to the central axis C1 in the vertical direction of the head 1 and parallel to the wall surface W, and the central axis in the longitudinal direction of the distal end side of the body 20 of the needle 2 The acute angle γ formed by C24 has a predetermined angle, and the needle 2 moves straight in the wall surface W in the direction D having the predetermined angle. Therefore, each needle | hook 2,2,2 spreads radially, and the needle part 3 is expanded. The predetermined angle of the angle γ is greater than 0 degree and less than 72.4 degrees. When the predetermined angle of the angle γ is 72.4 degrees or more, the radial spread of each of the needles 2, 2, 2 is small, that is, the needle 2 is easy to come out because the spread of the needle portion 3 is small. .

  To further explain the movement of the needle 2 in the wall surface W after the wall surface insertion space SP is formed, a force applied to the needle 2 from the wall surface W after the wall surface insertion space SP is formed, The force applied from the needle 2 into the wall surface W will be described. As shown in FIG. 4E, in the side view of the needle 2, the same direction as the central axis C24 in the longitudinal direction of the distal end side of the body portion 20 of the needle 2 out of the force P0 into which the needle 2 is inserted into the wall surface W. Is the force P02, and the component in the direction orthogonal to the force P02 is the force P00. The force P01 is balanced with a force P24, which is a component in the same direction as the force P01, of the force from the wall surface applied to the distal end portion 24 of the needle 2. Although only a side view and description of only one side are shown here, the force P01 is the same as the force P01 out of the force applied to the needle 2 from the wall surface. Balances the force of the direction component. As a result of the balance, a component force P02 in a direction parallel to the central axis C24 remains, and the needle 2 moves straight in the wall surface W in a direction parallel to the central axis C24, that is, in the direction D.

  According to the scissors 100 of the present embodiment configured as described above, the needles 2, 2, and 2 included in the needle portion 3 are respectively moved straight in the wall surface perpendicularly to the wall surface W when inserted into the wall surface. As a result of the straight advance, wall insertion spaces SP, SP, SP having a slight width in the direction orthogonal to the wall surface W and the same width as the needle 2 in the direction parallel to the wall surface W are formed, After the formation, each of the needles 2, 2 and 2 bends by receiving a force from the inside of the wall surface, and is inclined obliquely in a direction away from the central axis C1 in the vertical direction of the head 1, that is, the top and bottom of the head 1 The acute angle γ formed by the reference axis RW orthogonal to the central axis C1 in the direction and parallel to the wall surface W and the central axis C24 in the longitudinal direction of the distal end side of the body 20 of the needle 2 has a predetermined angle. Each needle 2, 2, 2 goes straight in the wall surface in the direction D, D, D having the predetermined angle. That. Therefore, the needle portion 3 is expanded from the distal end to the proximal end portion 30 in the wall surface. Therefore, in the scissors 100 of the present invention, only the needle portion 3 is inserted into the wall surface or the like, the proximal end portion 30 of the needle portion 3 is sufficiently expanded, and the needle portion 3 can be made difficult to come off from the wall surface. Further, since the wall surface insertion spaces SP, SP, SP formed when the needles 2, 2, 2 are inserted are close to each other, the holes opened in the wall surface W are almost at the same position and opened in the wall surface W. Since only one hole is required, the design is excellent.

  When the regular triangular pyramid shape T is a regular tetrahedron, the base angle α of the triangular side surfaces S1, S2, S3 shown in FIG. 3 is desirably 53 degrees or more and 70.5 degrees or less. When the angle α is less than 53 degrees, the sharpness of the tip of the needle 2 is insufficient, and the needle 2 is difficult to be inserted into the wall surface. On the other hand, when the angle α is larger than 70.5 degrees, the tip of the needle 2 becomes excessively sharp and is difficult to expand within the wall surface. On the other hand, when the regular triangular pyramid shape T is not a regular tetrahedron, the base angles of the triangular side surfaces S1, S2, and S3 are based on the length between the bottom surface of the regular triangular pyramid shape T and the vertex V4 with respect to the entire length of the needle 2. The desired angle is determined.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the claims. The needle may be, for example, a substantially triangular shape in plan view. The number of needles may be two or four or more. For example, the needles may be in contact with each other in the short direction, or may not be in contact. The head may have a shape provided with a hook, for example. The head portion and the proximal end portion of the needle portion may be integrated by, for example, welding.

100 鋲 1 Head 10 Plane part 2 Needle 20 Body part 20c Corner part L20c Side 21 Inner side surface (plane)
22, 23 Outside surface (plane)
24 Tip portion 3 Needle portion T Regular triangular pyramid shape V2 Vertex LT Ridge line CT, C2 Center axis θ angle S1, S2, S3 Side surface α Base angle

Claims (3)

A head portion and a needle portion having a plurality of needles, the head portion having a flat portion on one surface, each needle having a body portion and a tip portion, and the plane of the head portion The needle portion of each needle has a prismatic shape, and the tip portion of each needle has a sharp shape consisting of three flat surfaces, and the sharp point. The shape of the equilateral triangular pyramid is such that, from the position where the longitudinal central axis of the equilateral triangular pyramid coincides with the longitudinal central axis of the trunk, one apex of the equilateral triangular pyramid and the trunk It is inclined in a predetermined direction with one corner portion being matched, and the predetermined direction is the ridge line of the regular triangular pyramid shape including the apex, and the side of the trunk portion having the corner portion The angle formed by the angle is increased, and the angle is increased by a predetermined angle due to the inclination. Tack to. 2. The kite of claim 1, wherein the angle increment is greater than 0 degrees and less than 17.6 degrees. The saddle according to claim 1, wherein the regular triangular pyramid shape is a regular tetrahedron, and the base angle of the side surface of the regular triangular shape in the regular triangular pyramid shape is 53 degrees or more and 70.5 degrees or less.鋲 to do.

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