Field of the Invention

The present invention relates to a connection system for enabling connection by passing through a hole, on surfaces where there is no access to the back side, and for enabling connection between at least two parts having concentric holes.

Background of the Invention

In applications where connection is made to the surfaces by means of connecting members such as screws, bolts for various purposes, the location and structure of the surface to which connection is made is important. It is very difficult to make solid connections especially in structures in closed form where there is no or very limited access to the back side. Since the person making the connection cannot reach the back side of the surface, the bolt and nut cannot be connected to each other.

In the state of the art, applications in which pop rivet and bushing are compressed and shrunk are used. However, the expansion accumulated by the pop rivet while shrinking is very limited. Therefore, attachment of the connection system is very weak.

The utility model document no. CN208686751 U known in the state of the art discloses a connecting piece comprising an expansion bolt, an expansion tube, a conical bolt, and a bolt. The said document discloses that the cracks at the two ends of the expansion tube are expanded by the action of the nut.

The patent application no. GB2214594 A relates to a spacer comprising a cylindrical main structure, a conical structure, a bolt, and a nut. It is disclosed in the said document that in the said structure, when the bolt and nut are tightened, the fixing process is carried out without damaging the structure thanks to the conical structure.

Summary of the Invention

The objective of the present invention is to develop a novel connection system for enabling connection on surfaces where there is no access to the back side. Thanks to the connection system of the present invention, connection can be easily enabled in closed systems (blind areas) where it is not possible to access to the back side.

Another objective of the present invention is to provide a connection system for enabling connection between at least two parts having concentric holes.

A further objective of the present invention is to provide a connection system which can be applied independent of location, and enables double-sided attachment to the surface unlike the bench-top connection mechanisms in the state of the art.

Detailed Description of the Invention

“A CONNECTION SYSTEM", which is realized for achieving the objectives of the present invention, is described only for the better understanding of the subject and without any limiting effect.

Figure 1. is a side view of the parts of the connection system of the present invention.

Figure 2. is a perspective view of the parts of the connection system of the present invention.

Figure 3. is a side view of the body, conical part, and spiral wire.

Figure 4. is a side view of a first rotation mechanism on the connection system of the present invention.

Figure 5. is a side view of the bushing before tightening.

Figure 6. is a perspective view of the bushing after tightening. Figure 7. is a perspective view of the bushing on the multi-layer surface after tightening.

The parts shown in the figures are each given reference numerals as follows:

1. Connection system

2. Body

21. Male thread

3. Conical part

4. Spiral wire

5. Nut

6. Bushing

61. Cut form

7 First rotation mechanism

71. Primary body

711. Primary gear

712. Secondary gear

72. Primary holder

73. Control end

74. Primary spring

75. Secondary holder

76. Secondary spring

77. Rod alien

78. Nut with alien hole

79. Spring

The present invention relates to a connection system for enabling connection by passing through a hole, on surfaces where there is no access to the back side, and for enabling connection between at least two parts having concentric holes essentially comprises:

- a cylindrical body (2) with a conical part (3) on one side, - a nut (5), preferably which has a conical surface, which is placed on the body (2) so that it is symmetrical to the conical part (3),

- a bushing (6) which is positioned between the nut (5) surrounding the body (2) and the conical part (3),

- a cut form (61), which is located at both ends of the bushing (6) and moves to perpendicular position during connection, thereby allowing attachment from both sides to the surface on which connection is made.

The present invention relates to a connection system (1) on which there is a hole, and which is developed to be used on surfaces where there is no or very limited access to the back side. The said connection system (1) essentially comprises a cylindrical body (2) with a conical part (3) on one side, a nut (5) which has a conical surface and which is placed on the body (2), a bushing (6) which is positioned between the nut (5) surrounding the body (2) and the conical part (3), and a cut form (61) which is made on the bushing (6).

A conical part (3) preferably forming a bolt cap is located at one end of the body (2), and the said conical part (3) has a conical geometry in a tapering form. A cut form (61) is made on the surface of the bushing (6). The cut form (61) is parallel to the body (2) before the connection, and during the connection, it moves away from the body of the bushing (6) with the applied force and comes into a perpendicular position with respect to the body of the bushing (6), thereby forming daisy petals or a similar appearance. A conical nut (3) is connected at the end of the bushing (6) which is not connected to the body (2) . In a preferred embodiment of the connection system (1) of the present invention, the diameter of the conical body (2) is 8 millimeters. The cylindrical bushing (2) has an outer diameter of 10 millimeters and an inner diameter of 9 millimeters.

In the working principle of the connection system (1) of the present invention, firstly, there is a conical part (3) at one end of the body (2) and a nut (5) at the other end in order to enable a connection by passing through a hole, on surfaces where there is no access to the back side, or to enable a connection between at least two parts having concentric holes, the nut (5) with a conical structure and the conical part (3) are positioned so that they are symmetrical to each other. A bushing (6) is placed between the said nut (5) and the conical part (3) so as to surround the body (2). Cut forms (61) are made on the surfaces of the bushing (6) facing both the nut (5) and the conical piece (3), preferably parallel to the central axis of the body (2). The connection system (1) is placed into the hole with nut (5), bushing (6), conical part (3) on the body (2). A portion of the bushing (6) protrudes from both sides of the hole. When the user keeps the body (2) fixed and rotates the nut (5) circularly around its axis, the body (2) and the conical part (3) connected to the body (2) move linearly, bringing the conical part (3) and the nut (5) close to each other. In a preferred embodiment of the invention, when the user keeps the nut (5) fixed and rotates the body (2) circularly around its axis by means of the control part, the body (2) and the conical part (3) connected to the body (2) move linearly, bringing the conical part (3) and the nut (5) close to each other. As the conical part (3) and the nut (5) approach each other, the cut forms (61) on both surfaces of the bushing (6) between the conical part (3) and the nut (5) contact both the nut (5) and the conical part (3). Upon this contact, the position of the cut forms (61), which were initially parallel to the axis of the body (2), changes to be perpendicular to the body (2). As a result of this change, the said bushing (6) enables connection on the surfaces where there is no access to the back side, by passing through a hole. Likewise, the bushing (6) enables the connection between at least two parts having concentric holes.

In a preferred embodiment of the present invention, a connection system for enabling connection by passing through a hole, on surfaces where there is no access to the back side, and for enabling connection between at least two parts having concentric holes essentially comprises:

- a body (2) which has a cylindrical shape, - a male thread (21) which is provided on the cylindrical surface of the said body (2),

- a control part, preferably alien, star or flat, which is provided on the flat surface of said body (2),

- a threaded hole, which is provided on another flat surface of said body (2) so that it is concentric with the body (2), and inside which a reverse internal thread is drilled,

- a conical part (3), which is inserted into the said threaded hole, has a conical structure extending out of the hole, and in which the widest part of said conical structure is not larger than the diameter of the hole in which the connection is made,

- a tab which is placed on the conical surface of the conical part (3),

- a nut (5) which is inserted into the male thread (21) on the body (2),

- an annular hub which is positioned on the flat surface of the nut (5) facing the hole in which the connection is made,

- a bushing (6) which surrounds the body (2) and is placed between the conical part (3) and the nut (5),

- a cut form (61) which is located at both ends of the bushing (6) and moves to perpendicular position during connection, thereby allowing attachment from both sides to the surface on which connection is made,

- a spiral wire (4) which is placed between the bushing (6) and the conical part (3).

The connection system of the present invention comprises a body (2) which has a cylindrical shape for enabling connection by passing through a hole, on surfaces where there is no access to the back side, and for enabling connection between at least two parts having concentric holes, a male thread (21) which is provided on the cylindrical surface of the said body (2), a control part, preferably alien, star or flat, which is provided on the flat surface of said body (2), a threaded hole which is provided on another flat surface of said body (2) so that it is concentric with the body (2), and inside which an internal thread is drilled, a conical part (3) which is inserted into the said threaded hole, has a conical structure extending out of the hole, and in which the widest part of said conical structure is not larger than the diameter of the hole in which the connection is made, a tab which is placed on the conical surface of the conical part (3), a spiral wire (4) which is placed between the bushing (6) and the conical part (3), a nut (5) which is inserted into the male thread (21) on the body (2), an annular hub which is positioned on the flat surface of the nut (5) facing the hole in which the connection is made, a bushing (6) which surrounds the body (2) and is placed between the conical part (3) and the nut (5), and on which there is at least one cut form (61). In a preferred embodiment of the invention, said hub is in the shape of a channel containing concave or convex shapes. The fact that the hub has a concave or convex shaped channel helps to shape the cut forms (61) on the bushing (6). Thanks to the shaping performed, the bushing (6) is fixed to the desired surface.

In the working principle of the connection system (1) of the present invention, firstly, there is a conical part (3) at one end and a nut (5) at the other end on the male threads (21) of the body (2) in order to enable a connection by passing through a hole, on surfaces where there is no access to the back side, or to enable a connection between at least two parts having concentric holes. A bushing (6) is placed between the said nut (5) and the conical part (3) so as to surround the body (2). Cut forms (61) are made on the surfaces of the bushing (6) facing both the nut (5) and the conical piece (3), preferably parallel to the central axis of the body (2). Furthermore, a spiral wire (4) is positioned between the bushing (6) and the conical part (3). When the user keeps the nut (5) fixed and rotates the body (2) circularly around its axis by means of the control part, body (2) and the conical part (3) connected to the body (2) move linearly, bringing the conical part (3) and the nut (5) close to each other. In a preferred embodiment of the invention, when the user keeps the body (2) fixed by means of the control part and moves the nut (5) circularly around its axis, the body (2) and the conical part (3) connected to the body (2) move linearly, bringing the conical part (3) and the nut (5) close to each other. As the conical part (3) and the nut (5) approach each other, one end of the spiral wire (4) is fixed by being fited to the tab on the conical part (3) and its other end contacts the cut forms (61) on the bushing (6) and by applying force, the position of the cut forms (61), which is initially parallel to the axis of the body (2), changes to be perpendicular to the body (2). Likewise, as the conical part (3) and the nut (5) approach each other, the cut forms (61) contact the hub or channel on the nut (5). Since the hub or channel has a concave or convex structure and the applied force is sustained, the position of the cut forms (61), which is initially parallel to the axis of the body (2), changes to be perpendicular to the body (2) by applying force. As a result of this change, the said bushing (6) enables connection by passing through a hole, on the surfaces where there is no access to the back side. Likewise, the bushing (6) enables the connection between at least two parts having concentric holes.

Since the body (2) and the conical part (3) are connected to each other with a threaded hole, when the connection process is completed, the body (2) is dismantled by being rotated in the opposite direction of the connection process and the body (2) can be easily removed from the bushing (6).

In a preferred embodiment of the invention, for example, the spiral wire (4) has a length of 27.7 mm when unwound, and its flat width has a diameter of 2.5 mm. The diameter of the body (2) is 4mm. The spiral wire (4) is initially fited into the body (2) by stretching, after being fited, the outer diameter of the spiral wire (4) becomes 10 mm. During the tightening process, i.e., when the conical part (3) and the nut (5) approach each other, the spiral wire (4) stretches and rests on the tab, thus having an inner diameter of 7.8mm and an outer diameter of 12mm. Thanks to the wall thickness and expansion property of the spiral wire (4), it can easily pass through the desired hole, and during the tightening process, it contacts the bushing (6) and helps to open the cut forms (61) on the bushing (6). In other words, during the tightening process, the conical part (3) stretches and expands the spiral wire (4). The expanding spiral wire (4) contacts the cut forms (61), allowing the shape of the cut forms (61) to change, in other words, to open like a daisy. In a preferred embodiment of the invention, the cut forms (61) on the bushing (6) are made on the cylindrical surface of the bushing (6) parallel to its central axis and the said cut forms (61) are made at both ends of the bushing (6). The distance from the ends of the bushing (6) to the endpoints of the cut forms (61) parallel to the central axis of the bushing (6) is as much as the part or the thickness of the part.

In a preferred embodiment of the invention, the cut forms (61) on the bushing (6) are made on the cylindrical surface of the bushing (6) parallel to its central axis and said cut forms (61) are made at both ends of the bushing (6). The distance from the ends of the bushing (6) to the endpoints of the cut forms (61) parallel to the central axis of the bushing (6) is as much as the part or the thickness of the part.

The connection system (1) of the present invention is applicable for sheet metal, flat iron, wood (flat slats, etc.), leather (leatherette), composite plexiglass, plastic sheets such as polycarbonate, cardboard, paper, and similar flat parts.

In a preferred embodiment of the connection system (1) of the present invention, the screw threads remaining after fitting the body (2) can be used for other purposes.

A first rotation mechanism (7) for the application of the connection system (1) of the present invention keeps the body (2) fixed and allows the nut (5) to move circularly, and comprises:

- at least one primary body (71), which is mounted on a drill and surrounds the drill bit,

- at least one primary holder (72), preferably alien, which is aligned with the drill bit on the primary body and is fitted to the control part to prevent rotation of the body (2) inserted therein,

- at least one control end (73), which transfers the rotational movement received from the drill to the nut (5) via the control part and is positioned so as to surround the primary holder (72). In one embodiment of the invention, the first rotation mechanism (7) is applied after the body (2), nut (5) and bushing (6) are positioned in the area to be fitted. The nut (5) is inserted into the control end (73) which is fitted to the drill bit. The drill transfers the circular movement to the control end (73) by means of gears, and moves the nut (5) placed in the control end (73) circularly. The primary holder (72), which is located on the primary body (71) connected to the drill, preferably has an alien shape, and a hole is made so as to be concentric with the central axis of the control end (73). The primary holder (72), which is passed through the hole made in the center axis of the control end (73), has a structure such that it cannot come out of said hole; preferably the primary holder (72) is in the form of an L alien. The primary holder (72) keeps the body (2) fixed and the control end (73) rotates circularly around its axis with the circular motion received from the drill, allowing the nut to move along the body (2). As the nut (5) moves along the body (2), the conical part (3) and the nut (5) are brought close to each other.

In a preferred embodiment of the invention, the first rotation mechanism keeps the body (2) fixed, and moves the nut (4) circularly, allowing the bushing (6) to open and comprises:

• at least one primary body (71) which is mounted on a drill and surrounds the drill bit,

• at least one first gear (711) which is placed on the primary body (71) and at least one second gear (712) which performs a rotational movement around its own axis by means of the rotational movement received from the first gear (711),

• at least one control end (73) which grips the nut (5) and to which the second gear (712) transfers its rotational movement and into which the body (2) is inserted, • a primary holder (72) which extends through the control end (73) so as to enter the control part on the body (2) and to attach to the control part, thereby preventing rotation of the body (2).

In one embodiment of the invention, the rotation mechanism (7) is applied after the connection system (1) is inserted into the connection hole on a part. It is fitted on the end of the drill and transfers the rotational movement received from the drill (M) to the first gear (711). The first gear (711) rotating around its axis on the first body (71) transfers the rotational force to the secondary gear (712). The second gear (712) transfers the rotational movement to the control end (73). The non-rotating primary holder (72) in the control end (73) prevents the body (2) from rotating, the rotating control end (73) rotates the nut (5) surrounding the body (2) and pulls the conical part (3) towards itself through the screw threads on it. The primary holder (72) in the form of an alien rod prevents the body (2) from rotating and the control end (73) rotating together with the second gear (712) rotates the nut (5) and pulls the conical part (3) on the body (2) towards itself through the screw threads. In a preferred embodiment of the invention, a primary spring (74) is provided, one end of which is connected to the primary holder (72) and the other end of which is connected to the primary body (71) to support that the primary holder (72) positioned in the control end (73) remains fixed.

In an embodiment of the invention, the first rotation mechanism keeps the nut (5) fixed and transfers the rotational movement required to tighten the bushing (6), and comprises:

• at least one primary body (71), which is mounted on a drill and surrounds the drill bit,

• at least one secondary holder (75) which is located on the primary body (71) and is movable in the form of an arm, pivoting up and down and left and right, on the same axis as the drill bit and prevents rotation of the nut (5) inserted therein, • at least one control end (73) which is inserted into an alien-shaped control part on the drill bit and the body (2), and which transfers the rotational movement received from the drill bit to the body (2) via the control part.

In one embodiment of the invention, the first rotation mechanism (7) is applied after the connection system (1) has been inserted into the connection hole on the part to be connected. The control end (73) in the shape of an alien end fitted to the drill bit is inserted into the control part in the shape of an alien housing on the body (2) and the second holder (75) on the primary body (71) connected to the drill prevents the nut (5) from rotating. With the rotation of the drill, the nut (5) remains fixed, and the body (2) performs rotational movement and performs the tightening process. In a preferred embodiment of the invention, the second holder (75) comprises at least one second spring (76) which is positioned on the second holder and prevents the second holder (75) from moving more linearly than desired.

In a preferred embodiment of the invention, there is another application which keeps the nut (5) fixed and rotates the body (2), and comprises:

• at least one primary body (71) which is mounted on a drill and surrounds the drill bit,

• at least one secondary holder (75) which is located on the primary body (2) and is movable in the form of an arm on the same axis as the drill bit and prevents rotation of the nut (5) inserted therein,

• a fixed stop ring which is mounted near upper end of a rod alien (77), a nut with alien hole (78) which is movable along the alien, a spring (79) which extends under the body and finally a segment which prevents the spring (79) and the rod alien (77) from coming out of the control end (73),

• rod alien (77) which extends through the control end (73).

By rotating the drill in the left direction, the nut (5) in the secondary holder (75) and the conical structure are brought close to each other, and after the change of the bushing (6) remaining therebetween and the cut forms (61) at both ends, an attachment from both sides of the surface in a daisy appearance is provided.