A ball for fastening, with arrowhead-shaped pins on both ends and holes for the pins.

Abstract

This invention provides double-ended arrowhead connecting pins and perforated connecting spheres that allow for easy connection of polystyrene foam balls. [Solution] The double-arrowhead connecting pin is a connecting pin with arrowheads on both ends, and the perforated connecting sphere has a hole for inserting one end of the connecting pin. Two perforated connecting spheres can be connected by inserting one end of the double-arrowhead connecting pin into the hole of the perforated connecting sphere, and then inserting the other end of the pin into the hole of another perforated connecting sphere.

Description

Technical Field

[0001] The present invention relates to a connecting pin with arrowheads on both sides for connecting objects such as styrofoam, urethane, and wood, which have a soft interior and are not hollow, and a connecting sphere with holes made of a material such as styrofoam, urethane, or wood, which has a soft interior and is not hollow, and has holes for inserting the connecting pin with arrowheads on both sides.

Background Art

[0002] Conventionally, there has been no connecting sphere with holes made of a material such as styrofoam, urethane, or wood, which has a soft interior and is not hollow, having a connecting pin with arrowheads on both sides for connecting objects such as styrofoam, urethane, and wood, which have a soft interior and are not hollow, and having holes for inserting the connecting pin with arrowheads on both sides.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Conventionally, when connecting styrofoam balls, a method has been taken where a hole is made through the core of the styrofoam ball, a string such as a tag is passed through the hole, and then the string such as the tag is tied and fixed. However, the work is cumbersome and it is difficult to fix the tag and the like.

Means for Solving the Problems

[0004] A connecting pin with arrowheads on both sides is devised, which has the performance of being able to connect two objects by inserting one side of the connecting pin with arrowheads on both sides into a hole of an object having a hole for inserting the pin, and then inserting the opposite side of the pin into a hole of another object having a hole for inserting the pin. Also devised is a connecting sphere with holes for inserting the connecting pin with arrowheads on both sides.

Effects of the Invention

[0005] The double-ended arrowhead connecting pin of this invention is useful for easily connecting objects that are soft and not hollow inside, such as polystyrene foam, urethane, and wood. The perforated connecting sphere, which has a hole for inserting the double-ended arrowhead connecting pin, is useful for easily connecting multiple spheres, such as 6 or 8, made of soft and not hollow inside, such as polystyrene foam, urethane, and wood, when used in conjunction with the double-ended arrowhead connecting pin. [Brief explanation of the drawing]

[0006] [Figure 1] Figure 1 is a perspective view of the conical, double-ended arrowhead connecting pin 1, seen from the diagonal right. [Figure 2] Figure 2 is a top view of the conical double-arrowhead connecting pin 1, and also a front view of the conical double-arrowhead connecting pin 1. [Figure 3] Figure 3 is a perspective view of the flattened arrowhead-shaped connecting pin 2, seen from the upper right. [Figure 4] Figure 4 is a front view of the flattened arrowhead-shaped double-ended connecting pin 2. [Figure 5] Figure 5 is a plan view of the flattened arrowhead-shaped connecting pin 2, seen from directly above. [Figure 6] Figure 6 is a perspective view of the perforated sphere 3 for connecting, seen from the front and slightly above. [Figure 7] Figure 7 is a top view of the perforated sphere 3 used for connecting, seen from directly above. [Figure 8] Figure 8 is a bottom view of the perforated sphere 3 for connecting, seen from directly below. [Figure 9] Figure 9 is a front view of the total hole space 4 of the perforated sphere for connecting, with the perforated sphere 3 for connecting placed in the state shown in Figures 7 and 8, and all holes represented as solid lines. [Figure 10] Figure 10 is a side view from the right of the perforated sphere 3 used for connecting, with all holes represented as solid lines, showing the total hole space 4 of the perforated sphere used for connecting. [Modes for carrying out the invention]

[0007] First, when creating double-ended arrowhead connecting pins used to connect objects made of materials that are soft and not hollow inside, such as three-dimensional polystyrene foam or three-dimensional urethane, existing plastics or resins that have a certain degree of strength and flexibility to return to their original shape without breaking when bent are used as materials. When creating the same double-ended arrowhead connecting pins used to connect objects made of materials that are somewhat hard, such as wood, existing metals used for nails are used as materials.

[0008] Regarding the shape and dimensions of the double-ended arrowhead connecting pin of this invention, there is no need to impose any special conditions, as any shape and dimension is applicable. As an example of the double-ended arrowhead connecting pin, Figures 1 and 2 show a conical double-ended arrowhead connecting pin 1, in which the tip of the double-ended arrowhead connecting pin is conical, and Figures 3, 4, and 5 show a flat-arrow type double-ended arrowhead connecting pin 2, in which the arrowhead of the double-ended arrowhead connecting pin is a flat arrow shape. However, in order to represent the form for carrying out this invention, the embodiment will be described using the conical double-ended arrowhead connecting pin 1 shown in Figures 1 and 2 as an example.

[0009] It consists of a conical arrowhead 1-1, a circular cross-section arrowhead handle 1-2, and a circular over-insertion prevention thin plate 1-3, and has the shape shown in Figures 1 and 2. Furthermore, in order to allow the tip of the arrowhead to be smoothly inserted into a roughly circular hole pre-cut in three-dimensional polystyrene foam or the like, the thickness of the handle portion of the arrowhead is made to be about the same as the diameter of the hole, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the hole. When inserting the arrowhead, the softness of the three-dimensional polystyrene foam or the like pushes the lateral protrusion of the arrowhead into the hole with little force. When insertion is complete, the wall of the three-dimensional polystyrene foam or the like that has been pushed open by the protrusion returns to its original position, and when attempting to pull out the connecting pin with arrowheads on both sides, the protrusion bites into the wall of the hole, and the two sides become arrowheads. One example of a double-arrowhead connecting pin, characterized by a conical connecting pin that is not easily removed, is a conical double-arrowhead connecting pin 1 with a cone-shaped tip, which can be manufactured using an existing method such as creating it with an existing 3D printer, or using an existing method such as making a rod out of a plastic or resin that has a certain degree of strength and flexibility to return to its original shape even when bent, such as vinyl, or a metal that is the material for nails, and then making a mold from the prototype model of the double-arrowhead connecting pin created with the 3D printer, with the core direction of the arrowhead shaft vertical, and pressing the mold, which is divided into left and right halves, onto the vertically positioned rod from both sides, and molding the rod by heating the rod and applying pressure to the rod through the mold.

[0010] Next, using existing polystyrene foam spheres or wooden spheres, or other spheres made of materials that are soft and not hollow inside, as shown in Figures 6, 7, and 8, a through-hole 3-2 for connecting perforated spheres, a lower left hole 3-3 for the upper hemisphere of the connecting perforated sphere, a lower right hole 3-4 for the upper hemisphere of the connecting perforated sphere, an upper hole 3-5 for the upper hemisphere of the connecting perforated sphere, a lower left hole 3-6 for the lower hemisphere of the connecting perforated sphere, a lower right hole 3-7 for the lower hemisphere of the connecting perforated sphere, and an upper hole 3-8 for the lower hemisphere of the connecting perforated sphere. When creating the through-hole 3-2, a laser beam is used. Using existing methods such as irradiating the sphere of material to create a hole, or using existing methods such as pressing the tip of a rod-shaped electric wire cutter into the sphere of material to create a hole, and also using existing methods such as pressing the tip of a rod-shaped electric wire cutter into the sphere of material to create a straight hole that does not reach the core of the sphere of material, a hole with a roughly circular cross-section is made to penetrate the core of the sphere of material, and the hole is positioned so that it is directly above and below. After placement, three straight holes with roughly circular cross-sections are drilled at three points equidistant from the hole directly above the upper hemisphere, such that the three points form an equilateral triangle when connected, and that the holes extend from these three points toward the core of the sphere, reaching just before reaching the core of the sphere, such that the straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees, and as shown in the bottom view from directly below in Figure 8, equidistant from the hole directly below the lower hemisphere. Three straight holes, each with a roughly circular cross-section, are drilled at three locations such that the points of these three locations form an equilateral triangle, and that the holes extend from these three locations toward the core of the material sphere. These holes are drilled to just before reaching the core of the material sphere, and the straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees. This creates a sphere with connecting holes 3 that can be connected using arrowhead-shaped connecting pins on both sides.

[0011] To clearly illustrate the arrangement of all the holes, namely the through-hole 3-2 of the connecting perforated sphere, the lower left hole 3-3 of the upper hemisphere of the connecting perforated sphere, the lower right hole 3-4 of the upper hemisphere of the connecting perforated sphere, the upper hole 3-5 of the upper hemisphere of the connecting perforated sphere, the lower left hole 3-6 of the lower hemisphere of the connecting perforated sphere, the lower right hole 3-7 of the lower hemisphere of the connecting perforated sphere, and the upper hole 3-8 of the lower hemisphere of the connecting perforated sphere, all of which are represented as solid lines in the explanatory connecting perforated sphere space 4, and the outer edge 4-1 of the explanatory connecting perforated sphere, which is represented as a dotted line in the explanatory connecting perforated sphere outer edge 4. [Examples]

[0012] First, when creating double-ended arrowhead connecting pins used to connect objects made of materials that are soft and not hollow inside, such as three-dimensional polystyrene foam or three-dimensional urethane, existing plastics or resins that have a certain degree of strength and flexibility to return to their original shape without breaking when bent are used as materials. When creating the same double-ended arrowhead connecting pins used to connect objects made of materials that are somewhat hard, such as wood, existing metals used for nails are used as materials.

[0013] Regarding the shape and dimensions of the double-ended arrowhead connecting pin of this invention, there is no need to impose any special conditions, as any shape and dimension is applicable. As an example of the double-ended arrowhead connecting pin, Figures 1 and 2 show a conical double-ended arrowhead connecting pin 1, in which the tip of the double-ended arrowhead connecting pin is conical, and Figures 3, 4, and 5 show a flat-arrow type double-ended arrowhead connecting pin 2, in which the arrowhead of the double-ended arrowhead connecting pin is a flat arrow shape. However, in order to represent the form for carrying out this invention, the embodiment will be described using the conical double-ended arrowhead connecting pin 1 shown in Figures 1 and 2 as an example.

[0014] It consists of a conical arrowhead 1-1, a circular cross-section arrowhead handle 1-2, and a circular over-insertion prevention thin plate 1-3, and has the shape shown in Figures 1 and 2. Furthermore, in order to allow the tip of the arrowhead to be smoothly inserted into a roughly circular hole pre-cut in three-dimensional polystyrene foam or the like, the thickness of the handle portion of the arrowhead is made to be about the same as the diameter of the hole, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the hole. When inserting the arrowhead, the softness of the three-dimensional polystyrene foam or the like pushes the lateral protrusion of the arrowhead into the hole with little force. When insertion is complete, the wall of the three-dimensional polystyrene foam or the like that has been pushed open by the protrusion returns to its original position, and when attempting to pull out the connecting pin with arrowheads on both sides, the protrusion bites into the wall of the hole, and the arrowheads on both sides One example of a double-ended arrowhead connecting pin, characterized by the connecting pin being designed not to come loose easily, is a conical double-ended arrowhead connecting pin 1 with a conical tip, which can be manufactured using an existing method such as creating it with an existing 3D printer, or using an existing method such as forming a rod out of an existing plastic or resin, such as vinyl, which has a certain degree of strength and flexibility to return to its original shape without breaking when bent, or an existing metal, which is the material used for nails, into a rod shape, then setting the rod-shaped material vertically, taking a mold from the prototype model of the double-ended arrowhead connecting pin created with the 3D printer, and then, with the core direction of the arrowhead shaft vertical, pressing the mold, which is divided into left and right halves, onto the vertically set rod-shaped material from both the left and right sides, and molding the rod-shaped material by heating it and applying pressure to the rod-shaped material through the mold.

[0015] Furthermore, when inserting a double-ended arrowhead connecting pin made of a material with a certain degree of strength, such as metal, into a hole drilled in an object with a relatively hard interior, such as wood, the pin can be inserted to the desired position by using existing pliers or other tools of various shapes as pushing aids, according to the shape of the double-ended arrowhead connecting pin.

[0016] Next, using existing polystyrene foam spheres or wooden spheres, or other spheres made of materials that are soft and not hollow inside, as shown in Figures 6, 7, and 8, a through-hole 3-2 for connecting perforated spheres, a lower left hole 3-3 for the upper hemisphere of the connecting perforated sphere, a lower right hole 3-4 for the upper hemisphere of the connecting perforated sphere, an upper hole 3-5 for the upper hemisphere of the connecting perforated sphere, a lower left hole 3-6 for the lower hemisphere of the connecting perforated sphere, a lower right hole 3-7 for the lower hemisphere of the connecting perforated sphere, and an upper hole 3-8 for the lower hemisphere of the connecting perforated sphere. When creating the through-hole 3-2, a laser beam is used. Using existing methods such as irradiating the sphere of material to create a hole, or using existing methods such as pressing the tip of a rod-shaped electric wire cutter into the sphere of material to create a hole, and also using existing methods such as pressing the tip of a rod-shaped electric wire cutter into the sphere of material to create a straight hole that does not reach the core of the sphere of material, a hole with a roughly circular cross-section is made to penetrate the core of the sphere of material, and the hole is positioned so that it is directly above and below. After placement, three straight holes with roughly circular cross-sections are drilled at three points equidistant from the hole directly above the upper hemisphere, such that the three points form an equilateral triangle when connected, and that the holes extend from these three points toward the core of the sphere, reaching just before reaching the core of the sphere, such that the straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees, and as shown in the bottom view from directly below in Figure 8, equidistant from the hole directly below the lower hemisphere. Three straight holes, each with a roughly circular cross-section, are drilled at three locations such that the points of these three locations form an equilateral triangle, and that the holes extend from these three locations toward the core of the material sphere. These holes are drilled to just before reaching the core of the material sphere, and the straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees. This creates a sphere with connecting holes 3 that can be connected using arrowhead-shaped connecting pins on both sides.

[0017] In order to clearly show the arrangement of all the holes, namely, the through hole 3-2 of the spherical body with connecting holes, the lower left hole 3-3 of the upper hemisphere of the spherical body with connecting holes, the lower right hole 3-4 of the upper hemisphere of the spherical body with connecting holes, the upper hole 3-5 of the upper hemisphere of the spherical body with connecting holes, the lower left hole 3-6 of the lower hemisphere of the spherical body with connecting holes, the lower right hole 3-7 of the lower hemisphere of the spherical body with connecting holes, and the upper hole 3-8 of the lower hemisphere of the spherical body with connecting holes, the entire hole space 4 of the spherical body with connecting holes for explanation, in which all the holes are shown as solid lines as a space, and the outer edge 4-1 of the spherical body with connecting holes for explanation, in which the outer edge of the spherical body with connecting holes is shown as a dotted line, are shown in FIGS. 9 and 10.

Industrial Applicability

[0018] The double-arrowhead-shaped connecting pin of the present invention is useful for simply connecting an object that is soft inside and not hollow. The spherical body with connecting holes having holes for inserting the double-arrowhead-shaped connecting pin is useful for simply connecting a spherical body made of a material that is soft inside and not hollow. Therefore, it can be used in industrial fields that handle materials such as styrofoam, urethane, and wood, which are soft inside and not hollow.

Explanation of Reference Numerals

[0019] 1. When connecting objects made of soft materials such as three-dimensional polystyrene foam or three-dimensional urethane, existing plastics or resins that have a certain degree of strength and flexibility to return to their original shape without breaking when bent, such as vinyl, are used as the material. When connecting objects made of materials with a certain degree of hardness, such as wood, existing metals used for nails are used as the material. This is a double-arrowhead connecting pin with arrowheads on both ends. The tip of the arrowhead is inserted smoothly into a roughly circular hole pre-drilled in the three-dimensional polystyrene foam, etc. The thickness of the shaft portion of the arrowhead is made to be about the same as the diameter of the hole, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the hole. When inserting the pin, the softness of the polystyrene foam allows the lateral protrusions of the arrowhead to enter the hole with minimal force. Once insertion is complete, the walls of the hole, which have been widened by the protrusions, return to their original position. When attempting to pull out the double-sided arrowhead connecting pin, the protrusions bite into the walls of the hole, preventing the double-sided arrowhead connecting pin from being easily removed. Therefore, there are no special conditions regarding the shape and dimensions of the double-sided arrowhead connecting pin; any shape and dimensions are acceptable. As an example of the double-sided arrowhead connecting pin, Figures 1 and 2 show a conical double-sided arrowhead connecting pin, in which the tip of the double-sided arrowhead connecting pin is conical. 1-1 The conical double-ended arrowhead connecting pin 1 has conical arrowheads positioned on both sides, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the roughly circular hole made in the three-dimensional polystyrene foam, etc., so that when the double-ended arrowhead connecting pin is inserted into the hole in the three-dimensional polystyrene foam, etc., the softness of the three-dimensional polystyrene foam, etc. pushes the lateral protrusion of the arrowhead into the hole in the three-dimensional polystyrene foam, etc. with little force, and the hole in the three-dimensional polystyrene foam, etc. is pushed open by the protrusion of the arrowhead The condition is that when the wall returns to its original position and the double-sided arrowhead connecting pin is pulled out, the protrusion bites into the wall of the hole, preventing the double-sided arrowhead connecting pin from being easily removed. Therefore, other than making the size of the lateral protrusion of the arrowhead slightly larger than the diameter of the roughly circular hole made in the three-dimensional polystyrene foam, there are no special conditions on the shape and dimensions of the arrowhead, and any shape and dimensions are acceptable. As an example of the arrowhead, Figures 1 and 2 show a conical arrowhead. 1-2 This is the handle portion of the conical arrowhead 1-1. The condition is that the thickness of the arrowhead handle portion is made to be about the same as the diameter of a roughly circular hole made in the three-dimensional polystyrene foam, so that when inserting the double-sided arrowhead connecting pin into the hole made in the three-dimensional polystyrene foam, the softness of the three-dimensional polystyrene foam allows the lateral protrusion of the arrowhead to push into the hole with minimal force. Therefore, other than making the thickness of the arrowhead handle portion about the same as the diameter of the hole, there is no need to set any special conditions on the shape and dimensions of the arrowhead handle portion, and any shape and dimensions are acceptable. As an example of the arrowhead handle portion, Figures 1 and 2 show a circular cross-section arrowhead handle. 1-3 This is an over-insertion prevention plate positioned in the center of a conical, double-arrowhead connecting pin 1, designed to prevent the arrowhead of the connecting pin 1 from going too far into the hole in a three-dimensional foamed polystyrene or similar material. Since the purpose is to ensure that both arrowheads of the double-arrowhead connecting pin are inserted to equal lengths, there are no special conditions regarding the shape and dimensions of the over-insertion prevention plate; any shape and dimensions are acceptable. As an example of such an over-insertion prevention plate, Figures 1 and 2 show a circular over-insertion prevention plate. 2. When connecting objects made of soft materials such as three-dimensional polystyrene foam or three-dimensional urethane, existing plastics or resins that have a certain degree of strength and flexibility to return to their original shape without breaking when bent are used as the material. When connecting objects made of materials that have a certain degree of hardness, such as wood, existing metals used for nails are used as the material. This is a double-arrowhead connecting pin with arrowheads on both ends. The diameter of the shaft of the arrowhead is made to be about the same as the diameter of the hole, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the hole, so that the tip of the arrowhead can be smoothly inserted into a hole with a roughly circular cross-section that has been pre-drilled in the three-dimensional polystyrene foam or the like. The softness of the polystyrene foam allows the lateral protrusions of the arrowhead to enter the hole with minimal force. Once the entry is complete, the walls of the hole, which have been widened by the protrusions, return to their original position. When attempting to pull out the double-sided arrowhead connecting pin, the protrusions bite into the walls of the hole, preventing the double-sided arrowhead connecting pin from being easily removed. Therefore, there are no special conditions regarding the shape and dimensions of the double-sided arrowhead connecting pin; any shape and dimensions are acceptable. As an example of the double-sided arrowhead connecting pin, Figures 3, 4, and 5 show a flattened arrowhead double-sided arrowhead connecting pin. 2-1 Flat arrow-shaped connecting pin 2 has flat arrow-shaped protrusions on both sides. The size of the lateral protrusions of the arrowheads is made slightly larger than the diameter of the roughly circular hole made in the three-dimensional polystyrene foam when inserting the two-sided arrow-shaped connecting pin into the hole in the three-dimensional polystyrene foam. The softness of the three-dimensional polystyrene foam allows the lateral protrusions of the arrowheads to push into the hole with minimal force, and the protrusions of the arrowheads push the polystyrene foam open. The condition is that when the wall of the hole, such as a styrofoam, returns to its original position and an attempt is made to pull out the double-sided arrowhead connecting pin, the protrusion bites into the wall of the hole, preventing the double-sided arrowhead connecting pin from being easily pulled out. Therefore, other than making the size of the lateral protrusion of the arrowhead slightly larger than the diameter of the roughly circular hole made in the three-dimensional polystyrene foam, there are no special conditions required regarding the shape and dimensions of the arrowhead, and any shape and dimensions are acceptable. As an example of such an arrowhead, Figures 3, 4, and 5 show a flat arrowhead. 2-2 This is the handle portion of the flattened arrowhead 2-1. The condition is that the thickness of the arrowhead handle portion should be about the same as the diameter of a roughly circular hole made in the three-dimensional polystyrene foam, so that when inserting the double-sided arrowhead connecting pin into the hole made in the three-dimensional polystyrene foam, the softness of the three-dimensional polystyrene foam allows the lateral protrusion of the arrowhead to push into the hole with minimal force. Therefore, other than making the thickness of the arrowhead handle portion about the same as the diameter of the hole, there is no need to set any special conditions on the shape and dimensions of the arrowhead handle portion, and any shape and dimensions are acceptable. As an example of the arrowhead handle portion, Figures 3, 4, and 5 show a square cross-section arrowhead handle. 2-3 This is an over-insertion prevention plate positioned in the center of the flat, arrow-shaped, double-ended connecting pin 2, to prevent the arrowhead of the connecting pin 2 from going too far into the hole in the three-dimensional polystyrene foam or similar material. Since the purpose is to insert both arrowheads of the double-ended connecting pin by equal lengths, there are no special conditions regarding the shape and dimensions of the over-insertion prevention plate, and any shape and dimensions are applicable. As an example of the over-insertion prevention plate, the rectangular over-insertion prevention plate shown in Figures 3, 4, and 5 is shown. 3. As shown in the perspective view of Figure 6 and the top view of Figure 7, a hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The sphere is then positioned so that the hole is directly above and below it. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the hole directly above the upper hemisphere. These holes form an equilateral triangle when connected, and extend from these three points toward the core of the sphere, reaching just before the core. The straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the drilled hole form an angle of approximately 30 degrees. After that, as shown in the bottom view from directly below in Figure 8, three straight holes with roughly circular cross-sections are drilled at three points equidistant from the hole directly below the lower hemisphere, such that the three points form an equilateral triangle when connected, and that the holes extend from these three points toward the core of the material sphere, reaching just before the core of the material sphere. The straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees. Overall, the holes are arranged as shown in the front view in Figure 9 and the side view in Figure 10, resulting in a perforated sphere that can be connected using arrowhead-shaped connecting pins on both sides. 3-1 As shown in Figures 6, 7, and 8, the material for making perforated spheres for connecting is an existing material sphere such as a polystyrene foam sphere or a wooden sphere. 3-2 Through-holes for connecting spheres, created by drilling straight holes with an approximately circular cross-section through existing spheres made of materials such as polystyrene foam or wood, so as to pass through the core of the sphere. 3-3 As shown in the perspective view of Figure 6 and the top view of Figure 7, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the top hole on the upper hemisphere, such that the three points form an equilateral triangle, and that the straight line passing through the center of the cross-section of the sphere extends from these three points toward the core of the sphere, so that the straight line passing through the center of the cross-section of each hole forms an angle of approximately 30 degrees. Among the holes created in this way, the lower left hole of the upper hemisphere of the connecting perforated sphere is located in the lower left of the top view of Figure 7, is visible on the left side of the upper hemisphere in the front view of Figure 9, and is not shown in the side view from the right in Figure 10. 3-4 As shown in the perspective view of Figure 6 and the top view of Figure 7, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the top hole on the upper hemisphere, such that the three points form an equilateral triangle, and extending from these three points toward the core of the sphere. The straight line passing through the center of the cross-section of each hole and the straight line passing through the center of the cross-section of the through hole form an angle of approximately 30 degrees. The hole created in this way is the lower right hole of the upper hemisphere for connecting perforated spheres, located in the lower right of the top view of Figure 7, visible on the right side of the upper hemisphere in the front view of Figure 9, and visible on the left side of the upper hemisphere in the side view from the right of Figure 10. 3-5 As shown in the perspective view of Figure 6 and the top view of Figure 7, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the hole directly above the upper hemisphere, such that the three points form an equilateral triangle, and that the straight line passing through the center of the cross-section of the sphere extends from these three points toward the core of the sphere, so that the straight line passing through the center of the cross-section of each hole forms an angle of approximately 30 degrees. Among the holes created in this way, the upper hole of the upper hemisphere of the connecting perforated sphere is located directly above the through hole 3-2 in the top view of Figure 7, is not shown in the front view of Figure 9, but is visible on the right side of the upper hemisphere in the side view from the right of Figure 10. 3-6 As shown in the bottom view of Figure 8, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned so that it is directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the hole directly below the lower hemisphere, such that the three points form an equilateral triangle, and that the straight line passing through the center of the cross-section of the sphere extends from these three points toward the core of the sphere, so that the straight line passing through the center of the cross-section of each hole forms an angle of approximately 30 degrees. The hole created in this way is the lower left hole of the lower hemisphere of the connecting perforated sphere, located in the lower left of the bottom view of Figure 8, visible on the left side of the lower hemisphere in the front view of Figure 9, and not shown in the side view from the right in Figure 10. 3-7 As shown in the bottom view of Figure 8, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned so that it is directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the hole directly below the lower hemisphere, such that the three points form an equilateral triangle, and that the straight line passing through the center of the cross-section of the sphere extends from these three points toward the core of the sphere, so that the straight line passing through the center of the cross-section of each hole forms an angle of approximately 30 degrees. This is the lower right hole of the lower hemisphere of the connecting perforated sphere, which is located in the lower right of the bottom view of Figure 8, appears on the right side of the lower hemisphere in the front view of Figure 9, and appears on the left side of the lower hemisphere in the side view from the right of Figure 10. 3-8 As shown in the bottom view of Figure 8, a straight hole with an approximately circular cross-section is drilled through an existing sphere made of a material such as a polystyrene foam sphere or a wooden sphere, passing through the core of the sphere. The through hole is positioned so that it is directly above and below the sphere. Three straight holes with approximately circular cross-sections are then drilled at three points equidistant from the hole directly below the lower hemisphere, such that the three points form an equilateral triangle, and that the straight line passing through the center of the cross-section of the material sphere extends from these three points toward the core of the material sphere, so that the straight line passing through the center of the cross-section of each hole forms an angle of approximately 30 degrees. Among the holes created in this way, the upper hole of the lower hemisphere of the perforated sphere for connecting is located directly above the through hole 3-2 of the polystyrene foam sphere for connecting in the bottom view of Figure 8, and is not shown in the front view of Figure 9, but is visible on the right side of the lower hemisphere in the side view of Figure 10. 4 As shown in Figures 9 and 10, in order to explain the arrangement and shape of all the holes in the perforated sphere 3 for connecting, namely the through-hole 3-2, the lower left hole 3-3 of the upper hemisphere, the lower right hole 3-4 of the upper hemisphere, the upper hole 3-5 of the upper hemisphere, the lower left hole 3-6 of the lower hemisphere, the lower right hole 3-7 of the lower hemisphere, and the upper hole 3-8 of the lower hemisphere, the perforated sphere for connecting is placed in the state shown in Figures 7 and 8, and all of these holes are represented as solid lines in the explanatory diagram of the total hole space of the perforated sphere for connecting. 4-1 As shown in Figures 9 and 10, in order to explain the arrangement and shape of all the holes in the perforated sphere 3 for connecting, namely the through-hole 3-2, the lower left hole 3-3 of the upper hemisphere, the lower right hole 3-4 of the upper hemisphere, the upper hole 3-5 of the upper hemisphere, the lower left hole 3-6 of the lower hemisphere, the lower right hole 3-7 of the lower hemisphere, and the upper hole 3-8 of the lower hemisphere, it is necessary to clarify the positional relationship between the perforated sphere 3 for connecting and the explanatory perforated sphere's entire hole space 4. Therefore, the outer edge of the perforated sphere 3 for connecting is shown as a dotted line.

Claims

【Request Item 1】 When connecting objects made of soft materials such as three-dimensional polystyrene foam or three-dimensional urethane, which are not hollow inside, existing plastics or resins that have a certain degree of strength and flexibility to return to their original shape even when bent without breaking are used as the material. When connecting objects made of materials that are somewhat hard, such as wood, which are not hollow inside, existing metals used for nails are used as the material. These are connecting pins with arrowheads at both ends, and the tips of the arrowheads are inserted smoothly into holes with a roughly circular cross-section that have been pre-drilled in the three-dimensional polystyrene foam or other material. To allow insertion into the hole, the thickness of the shaft portion of the arrowhead is made to be about the same as the diameter of the hole, and the size of the lateral protrusion of the arrowhead is made slightly larger than the diameter of the hole. This allows the lateral protrusion of the arrowhead to enter the hole with minimal force due to the softness of the three-dimensional polystyrene foam, and once insertion is complete, the wall of the hole, which has been widened by the protrusion, returns to its original position, and when attempting to pull out the connecting pin, which has arrowhead shapes on both sides, The connecting pin is characterized by a protrusion that bites into the wall of the hole, preventing the connecting pin, which has arrowhead-shaped ends on both sides, from easily coming out, and by installing a thin plate to prevent overinsertion in the center of the shaft of the arrowhead of the connecting pin, which has arrowhead-shaped ends on both sides, with the aim of inserting the arrowheads on both sides by an equal distance. The connecting pin is characterized by the fact that a hole with an approximately circular cross-section is made through a soft, non-hollow material sphere, such as an existing polystyrene or urethane ball, so as to pass through the core of the sphere, and the hole is positioned so that it is directly above and directly below, and the center of the upper hemisphere Three straight holes with roughly circular cross-sections are drilled at three equidistant points from the upper hole, such that connecting these three points forms an equilateral triangle, and extending from these three points toward the core of the sphere, until they reach just before the core of the sphere, so that the line passing through the center of the cross-section of each hole in the upper hemisphere and the line passing through the center of the cross-section of the through-hole form an angle of approximately 30 degrees. Then, three straight holes with roughly circular cross-sections are drilled at three equidistant points from the hole directly below the lower hemisphere, such that connecting these three points forms an equilateral triangle, and extending from these three points toward the core of the sphere,A perforated sphere for connecting, characterized in that the material sphere is drilled to just before reaching its core, and the straight line passing through the cross-sectional center of each hole in the lower hemisphere and the straight line passing through the cross-sectional center of the hole that penetrates the sphere form an angle of approximately 30 degrees, and multiple such perforated spheres are connected using the arrowhead-shaped connecting pins on both sides.

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