KR100719321B1 - Folding hinge structure for connecting pipes - Google Patents

Abstract

According to the present invention, the distance between the pipes is approximately 1 mm, so that the pipes can be bent freely from 0 degrees to 180 degrees by forming a hinge to bend the pipes, while actually connecting the same as the one-piece pipe. By making it foldable, when using it as a skeleton of furniture, chairs, sports equipment, and various kinds of equipment, the total volume can be varied by free bending and the pipe can be bent in multiple stages when not in use. A straight folding hinge structure for reducing pipe connection. The pipe-type folding hinge structure for connecting pipes may include a first fixing bracket which is fastened in the first pipe and has a first rotating part mounting socket at one side thereof in the pipe connecting structure for horizontally connecting the first pipe and the second pipe; A second fixing bracket which is fastened in a second pipe and has a second rotary mounting socket on one side, and a folding that interconnects the first and second rotary mounting sockets so that the first fixing bracket and the second fixing bracket are foldable; It is characterized by consisting of a hinge portion. Here, the folding rotation angle between the first fixing bracket and the second fixing bracket is preferably 0 to 180 degrees.

Pipe connection, hinge, folding, stopper, 180 degree

Description

Folding hinge structure for connecting pipes

Figures 1a and 1b is a perspective view and a cross-sectional view of the coupling of the straight folding hinge portion for pipe connection according to the first embodiment of the present invention.

Figure 1c is an exploded perspective view of the straight folding hinge portion for pipe connection of Figure 1a.

FIG. 1D is a state diagram in which the straight folding hinge for pipe connection of FIG. 1A is applied to a pipe. FIG.

Figures 2a and 2b is a perspective view and a cross-sectional view of the coupling of the straight folding hinge portion for pipe connection according to the second embodiment of the present invention.

Figure 2c is an exploded perspective view of the straight folding hinge portion for pipe connection of Figure 2a.

FIG. 2D is a state diagram in which the straight folding hinge for pipe connection of FIG. 2A is applied to the pipe. FIG.

3a and 3b is a perspective view and a cross-sectional view of the coupling of the straight folding hinge portion for pipe connection according to the third embodiment of the present invention.

Figure 3c is an exploded perspective view of the straight folding hinge portion for pipe connection of Figure 3a.

3D is a perspective view of the stopper rotation cam and guide cam of FIG. 3C.

3E is a state diagram in which the straight folding hinge for pipe connection of FIG. 3A is applied to the pipe.

Explanation of symbols on the main parts of the drawings

100, 200, 300: straight folding hinge for pipe connection according to the present invention

10: first pipe 20: second pipe

110, 210, 310: first fixing bracket

111, 211, 311: socket for first rotating part

120, 220, 320: second fixing bracket

121, 221, 321: socket for second rotating part

130, 240, 241, 380, 381: fixed shaft

140: stopper rotation cam 141: locking projection

150: guide cams 230, 330: connecting plate

340: first stopper rotation cam 350: second stopper rotation cam

360: first guide cam 370: second guide cam

The present invention relates to a straight folding hinge structure for pipe connection, and more particularly, by forming a hinge that can bend the pipe while actually connecting the same as the one-piece pipe with a distance between the pipes of about 1 mm. By bending the pipe freely from 0 degrees to 180 degrees, it can be folded, so that when used as a frame of furniture, chairs, or sports equipment, the straight folding hinge for pipe connection can diversify the total volume by free bending and reduce the total volume when not in use It's about structure.

In general, the skeleton of furniture or chairs are processed into wood or pipes and used to manufacture them.

By the way, when fitting using a pipe as a skeleton of a furniture or a chair, a pipe connector for connecting the pipe and the pipe is required. In the conventional pipe connection method, a spiral groove is formed in the pipe itself to connect the pipe and the pipe by screwing, or a fastening hole is formed in the pipe to connect by using a bolt, a nut or a rivet.

However, in the conventional pipes as described above, only the connecting means for the connection are presented, so that the pipes and the pipes can be used to be bent and used. It cannot be presented.

Moreover, since a single pipe is formed only in one piece and cannot be bent separately, there is a limit to reducing its volume when not used in tables, chairs, sports equipment, furniture, and the like.

The present invention has been made to solve the above-described problems, the object of the present invention is to connect the pipes in the same way as the one-piece pipe actually having a distance between the pipes about 1mm, while forming a hinge to bend the pipe separately Can be folded freely from 0 degrees to 180 degrees, and when used as a framework for furniture, chairs, or sports equipment, the product can be simplified by varying the total volume by free bending and pipe bending multiple times when not in use. To provide a straight folding hinge structure for pipe connections that can significantly reduce the overall volume.

The straight folding hinge structure for pipe connection according to the present invention for achieving the above object of the present invention, in the pipe connection structure for horizontally connecting the first pipe and the second pipe, is fastened in the first pipe and is formed on one side A first fixing bracket having a first rotating bracket, a second fixing bracket fastened in the second pipe and having a second rotating mounting socket at one side thereof, and the first fixing bracket and the second fixing bracket being foldable; And a folding hinge portion for interconnecting the first and second rotary part mounting sockets.

Here, the folding rotation angle between the first fixing bracket and the second fixing bracket is preferably 0 to 180 degrees.

In addition, the folding hinge portion, the lower end is fixed to be inserted so as to be axially rotated in the hole of the first rotating portion mounting socket and the upper end is fixed shaft is inserted to be fixed to the axis of the hole of the second rotating portion mounting socket; Inserted into the fixed shaft from the lower side of the first rotating part mounting socket and interlocked with the first and second rotating part mounting sockets to be rotatably installed, and limiting a folding angle between the first and second rotating part mounting sockets. It may be made of a stopper rotary cam having a locking projection.

In addition, a locking jaw corresponding to the locking projection of the stopper rotation cam may be formed in the first rotation socket mounting socket, and a guide cam may be formed below the stopper rotation cam.

The folding hinge unit may further include: a connecting plate having first and second shaft holes symmetrically formed at left and right sides thereof; A lower end portion inserted and fixed to be axially rotated in the first shaft hole of the connection plate, and an upper end portion inserted into and fixed to be axially rotated into the hole of the first rotating part mounting socket; A second fixed shaft having a lower end inserted into and fixed to the second shaft hole of the connection plate, and an upper end inserted into and fixed to the hole of the socket for mounting the second rotating part; A first locking protrusion formed upwardly at one side of the connection plate on the side where the first shaft hole is formed; The first mounting socket and the connection plate may be formed at both ends of the arc-shaped guide side and the arc-shaped guide side of the first mounting protrusion guided at one end of the first mounting socket to limit the guide of the first locking protrusion. A first arc-shaped guide part having a first locking jaw for limiting a rotation angle therebetween; A second locking protrusion formed upwardly at one side of the connection plate on the side where the second shaft hole is formed; The second mounting socket and the connection plate are formed at both ends of an arc-shaped guide side portion at which one end of the second mounting socket is guided, and at both ends of the arc-shaped guide side, thereby limiting the guide of the second locking protrusion. It may be composed of a second arc-shaped guide portion having a second locking step for limiting the rotation angle therebetween.

In addition, the folding hinge portion, the lower end is fixed to be inserted into the shaft of the first rotating portion mounting socket to be fixed, the upper end is fixed to be inserted into the shaft of the second rotating portion mounting socket fixed shaft; A guide cam inserted into the fixed shaft between the first and second rotary part mounting sockets and having a guide surface formed on an upper surface thereof; The guide cam is inserted into the fixed shaft on the guide cam and interlocked with the first and second rotating part mounting sockets to be rotatably installed, and to limit the folding angle between the first and second rotating part mounting sockets. It may be made of a stopper rotary cam having a locking projection surface guided along the guide surface of the.

In addition, the guide surface of the guide cam is formed with a plurality of downwardly inclined portion and the upwardly engaging portion in sequence, and the corresponding locking projection surface of the stopper rotary cam is guided along the downwardly inclined portion and then caught in the upwardly latching portion. It is preferable that the folding angle between the two rotary part mounting sockets is limited.

The folding hinge unit may further include: a connecting plate having first and second shaft holes symmetrically formed at left and right sides thereof; A lower end portion inserted and fixed to be axially rotated in the first shaft hole of the connection plate, and an upper end portion inserted into and fixed to be axially rotated into the hole of the first rotating part mounting socket; A lower end portion inserted into and fixed to the second shaft hole of the connection plate, and an upper end portion inserted into and fixed to rotate in the hole of the second rotating portion mounting socket; A first guide cam inserted into the first fixed shaft between the first rotating part mounting socket and the first shaft hole of the connection plate and having a first guide surface formed on a lower surface thereof; Is inserted into the first fixed shaft from the lower side of the first guide cam, the first mounting socket and the connecting plate is interlocked and installed to be rotatable, limiting the folding angle between the first mounting socket and the connecting plate A first stopper rotating cam having a first engaging protrusion surface guided along a guide surface of the first guide cam to an upper surface thereof; A second guide cam inserted between the second rotary part mounting socket and the second shaft hole of the connection plate and inserted into the second fixed shaft and having a second guide surface formed on an upper surface thereof; Is inserted into the second fixed shaft on the second guide cam and the second mounting socket and the connecting plate are interlocked and installed to be rotatable, so as to limit the folding angle between the second mounting socket and the connecting plate. It may be made of a second stopper rotary cam having a second locking projection surface is guided along the guide surface of the second guide cam on the lower surface.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1a and Figure 1b is a perspective view and a coupling cross-sectional view of the coupling portion of the straight folding hinge for pipe connection according to the first embodiment of the present invention, Figure 1c is an exploded perspective view of the pipe-shaped straight hinge hinge of Figure 1a, Figure 1d A state diagram in which the straight folding hinge for pipe connection of 1a is applied to a pipe will be described together for convenience of description.

As shown in FIGS. 1A to 1D, the structure of the straight folding hinge part 100 for pipe connection according to the first embodiment of the present invention is a horizontal connection between the first pipe 10 and the second pipe 20. A pipe connection structure, comprising: a first fixing bracket (110) fastened in a first pipe (10) and having a first rotating portion mounting socket (111) on one side; A second fixing bracket 120 fastened in the second pipe 20 and having a second rotating part mounting socket 121 on one side thereof; The lower end portion is fixed to be inserted into the hole 112 of the first rotating portion mounting socket 111 to be axially rotated, and the upper end is fixed shaft 130 is inserted into and fixed to the hole 122 of the second rotating portion mounting socket 121 )and; It is inserted into the fixed shaft 130 from the lower side of the first rotating socket mounting socket 111 and interlocked with the first and second rotating socket mounting sockets 111 and 121 to be rotatably installed, and the first and second rotating sockets are mounted. It consists of a stopper rotary cam 140 having a locking projection 141 for limiting the folding angle between (111) and (121).

Fastening holes (not shown) are formed at upper and lower sides of the first and second pipes 10 and 20, respectively, so that the upper and lower fastening holes of the first and second fixing brackets 110 and 120 are respectively. 113 and 123 are joined by fastening means 30, such as rivets or bolts and nuts, to allow the first and second pipes 10 and 20 to bend each other (see FIG. 1D). Here, the first and second fixing brackets (10) and the first and second fixing brackets (brackets) 110, 120 when fully horizontal fastening of the first and second fixing brackets (bracket) 110 and 120 are completely accommodated inside the first and second pipes 10 and 20 so that the distance between the pipes is about 1 mm, which is actually the same as that of the one-piece pipe, while being able to bend.

The first and second fixing brackets 110 and 120 may be bent in an 'S' shape or an inverted 'S' shape except for the first and second rotating part mounting sockets 111 and 121. As described above, two upper and lower fastening holes 113 and 123 for fastening with the first and second pipes 10 and 20 are formed as described above.

The first rotating part mounting socket 111 protrudes horizontally forward at one side end of the first fixing bracket 110 is inserted into the center so that the fixing shaft 130 is rotatable in the center. The hole 112 is formed, and the locking jaw 114 is formed at the right end of the disc shape so as to correspond to the locking projection 141 of the stopper rotating cam 140. As such, since the locking jaw 114 is formed at the right end of the first fixing bracket 100 in the longitudinal direction, the locking jaw 114 is interlocked with the first and second rotating part mounting sockets 111 and 121 to fix the shaft 130. ), The locking projection 141 of the stopper rotation cam 140 is caught when the angle between the first and second rotating part mounting sockets 111 and 121 is 180 degrees (completely unfolded in the form of a straight line) when the shaft is rotated along Since the first and second pipes 10 and 20 can be bent from 0 degrees to 180 degrees (horizontal state), the jaw 114 can not be rotated any more, thereby limiting the folding angle. Bending becomes impossible. Of course, the formation position of the locking step 114 is a folding angle (0 degrees between the first and second rotary mounting sockets 111, 121, that is, between the first and second fixing brackets 110, 120). -360 degrees) can be variously changed, of course. In the illustrated example, the stopper rotation cam 140 is positioned below the first fixing bracket 110, but the stopper rotation cam 140 may be formed between the first and second fixing brackets 110 and 120. At this time, the locking projection 141 is formed to the lower side to be caught by the locking projection (114).

The second rotating part mounting socket 121 protruding horizontally forward at one side end (left side) of the second fixing bracket 120 is substantially disc-shaped, and the fixing shaft 130 is rotatable at the center thereof. The hole 122 is inserted to be formed.

The stopper rotary cam 140 is also formed with a hole 142 in the center so that the fixed shaft 130 is rotatable, and as described above, the one side portion protruding upwardly formed a locking protrusion 141. Is formed and interlocked with the first and second rotating part mounting sockets 111 and 121 to be caught by the locking jaw 114 of the first rotating part mounting socket 111 when the shaft is rotated. It is intended to limit the open angle (up to 180 degrees) between the < RTI ID = 0.0 >

In the illustrated example, the fixed shaft 130 is composed of a coupling means of the bolt fixed shaft 130 and the nut 131, but may be formed of rivets, but the type is not limited in the present invention.

A guide cam 150 is formed immediately below the stopper rotary cam 140 to guide the rotation of the stopper rotary cam 140 from the bottom side when engaged.

Here, reference numerals 161, 163, and 164 are washers, and 162 is a disk.

Figure 2a and 2b is a perspective view and a cross-sectional view of the coupling of the straight folding hinge of the pipe connection according to the second embodiment of the present invention, Figure 2c is an exploded perspective view of the pipe of the straight folding hinge of Figure 2a, Figure 2d As a state diagram in which the straight folding hinge for pipe connection of 2a is applied to a pipe, it will be described together for convenience of description.

As shown in Figures 2a to 2d, the structure of the straight folding hinge portion 200 for pipe connection according to the second embodiment of the present invention, the horizontal connection between the first pipe 10 and the second pipe 20 A pipe connection structure, comprising: a first fixing bracket (210) having a first rotating part mounting socket (211) fastened in a first pipe (10) and extending in a longitudinal direction on one side; A second fixing bracket 220 fastened in the second pipe 20 and having a second rotating part mounting socket 221 extending in a length direction on one side thereof; Connecting plates 230 having first and second shaft holes 231 and 232 symmetrically formed at right and left sides thereof; The first fixed shaft is inserted into the lower end is fixed so as to rotate in the first shaft hole 231 of the connecting plate 230, and the upper end is inserted into the hole 212 of the mounting hole 211, the first fixed shaft 240; The lower end portion is inserted into and fixed to the second shaft hole 232 of the connecting plate 230, and the upper end portion is fixed to the second fixed shaft inserted into and fixed to the hole 223 of the second rotating portion mounting socket 221 ( 241); A first locking protrusion 233 upwardly formed at one side of the connection plate 230 at the side where the first shaft hole 231 is formed; It is formed at both ends of the first arc-shaped guide side portion 214-1 and the first arc-shaped guide side portion 214-1 in which the first locking projection 233 is guided at one end of the first mounting socket 211. A first circle having a first catching jaw 214-2 which restricts the guide of the first catching protrusion 233 to limit the angle of rotation between the first mounting socket 211 and the connecting plate 230. Arc-shaped guide portion 214; A second locking protrusion 234 upwardly formed at one side of the connection plate 230 at the side where the second shaft hole 232 is formed; It is formed at both ends of the second arc-shaped guide side portion 224-1 and the second arc-shaped guide side portion 224-1 in which the second locking projection 234 is guided at one end of the second mounting socket 221. A second circle having a second locking step 224-2 to limit the guide of the second locking protrusion 234 to limit the rotation angle between the second mounting socket 211 and the connection plate 230. It consists of an arc-shaped guide part 224.

Fastening holes (not shown in the drawing) are formed at one side of the first and second pipes 10 and 20, respectively, and fastening holes 213 of the first and second fixing brackets 210 and 220. 223 is joined by fastening means 30, such as rivets or bolts and nuts, to allow the first and second pipes 10 and 20 to bend each other (see FIG. 2D). Here, even when the first and second pipes 10 and 20 and the first and second fixing brackets 210 and 220 according to the present invention are completely horizontally fastened, the first and second fixing brackets (210) and (220) are completely accommodated inside the first and second pipes (10) and (20) so that the distance between the pipes is about 1 mm, which is actually the same as that of the one-piece pipe, while being able to bend.

Unlike the first embodiment described above, the first and second fixing brackets 210 and 220 have a pipe shape, and four fastening holes 213 and 223 are formed on only one side. However, the present invention does not limit the shape, the number of fastening holes, or the like.

The first rotating part mounting socket 211 protruding horizontally in the longitudinal direction at one end of the first fixing bracket 210 is inserted into the first fixing shaft 240 in the center in a substantially rectangular plate shape. A hole 212 is formed, and a first arc-shaped guide side portion 214-1 and two first locking jaws 214 formed at both ends thereof are formed at one end (right side) of the first mounting socket 211. A first arc-shaped guide portion 214 consisting of -2) is formed.

Similarly, the second rotating part mounting socket 221 protruding horizontally in the longitudinal direction to one side end (left side) of the second fixing bracket 220 also has a substantially rectangular shape in the center of the second fixing shaft 241. The rotatably inserted hole 222 is formed, and at one side end (left side) of the second rotating unit mounting socket 211, a second arc-shaped guide side portion 224-1 and two agents formed at both ends thereof are formed. The second arc-shaped guide portion 224 is formed of a first locking jaw (224-2).

The first and second shaft holes 231 and 232, into which the first and second fixed shafts 240 and 241 are axially rotated, are formed on the connection plate 230, respectively. The first locking protrusion 233 upwardly formed on the first shaft hole 231 and the second locking protrusion 234 formed upwardly on the second shaft hole 232 are symmetrically formed.

As such, the first and second arc-shaped guide parts 214 having the first and second locking protrusions 233 and 234 of the connecting plate 230 and the locking jaws 214-2 and 224-2 corresponding thereto. By forming the 224, the connecting plate 230 and the first rotating part mounting socket 211 or the second rotating part mounting socket 221 are rotated with each other, and the angle between them is 180 degrees (completely unfolded in a straight shape). When the locking projection is caught on the locking jaw and can no longer rotate, the first and second pipes 10 and 20 can be bent from 0 degree to 180 degrees (horizontal state), but no subsequent bending is possible. Done.

The first and second fixed shafts 240 and 241 are preferably formed by rivets, but the type of the first and second fixed shafts 240 and 241 is not limited thereto.

Reference numeral 250 denotes a guide cam, 261, 263, and 264 are washers, and 262 is a disc.

3a and 3b is a perspective view and a cross-sectional view of the coupling of the straight folding hinge portion for pipe connection according to a third embodiment of the present invention, Figure 3c is an exploded perspective view of the straight folding hinge portion of the pipe connection of Figure 3a, Figure 3d 3C is a perspective view of the stopper rotary cam and the guide cam, and FIG. 3E is a state diagram in which the straight connection hinge for pipe connection of FIG. 3A is applied to the pipe, and will be described together for convenience of description.

As shown in Figures 3a to 3e, the straight folding hinge portion 300 for pipe connection according to the third embodiment of the present invention, the pipe for horizontally connecting the first pipe 10 and the second pipe 20 A connection structure comprising: a first fixing bracket (310) having a first rotating part mounting socket (311) fastened in a first pipe (10) and extending in a longitudinal direction on one side; A second fixing bracket 320 fastened in the second pipe 20 and having a second rotating part mounting socket 321 extending in a length direction on one side thereof; Connecting plates 330 having first and second shaft holes 331 and 332 symmetrically formed at right and left sides thereof; The lower end portion is inserted into and fixed to the first shaft hole 331 of the connecting plate 330, and the upper end portion is inserted into and fixed to the hole 312 of the first rotating part mounting socket 311, the first fixed shaft ( 380); The lower end portion is inserted into and fixed to the second shaft hole 332 of the connecting plate 330, and the upper end portion is inserted into and fixed to the hole 322 of the second rotating portion mounting socket 321, the second fixed shaft ( 381); The first guide cam 360 is inserted into the first fixed shaft 380 between the first rotating part mounting socket 311 and the first shaft hole 331 of the connecting plate 330, and has a guide surface 361 formed on the lower surface thereof. and; Inserted into the first fixed shaft 380 from the lower side of the first guide cam 360, the first mounting socket 311 and the connecting plate 330 is interlocked and installed to be rotatable, the first mounting socket 311 And a first stopper rotary cam 340 having a first engaging projection surface 341 guided along the guide surface 361 of the first guide cam 360 on the upper surface to limit the folding angle between the connection plate and the connection plate 330. and; The second guide cam 370 is inserted into the second fixed shaft 381 between the second rotary part mounting socket 321 and the second shaft hole 332 of the connecting plate 330, the guide surface 371 is formed on the upper surface and; It is inserted into the second fixed shaft 381 on the second guide cam 370 and the second mounting socket 321 and the connecting plate 330 are interlocked and installed to be rotatable, and the second mounting socket 321 The second stopper rotary cam 350 includes a second locking protrusion 351 which is guided along the guide surface of the second guide cam 370 to limit the folding angle between the connection plates 330.

One side of the first and second pipes 10 and 20 is provided with a fastening hole (not shown in the figure), respectively, and fastening holes 313 of the first and second fixing brackets 310 and 320. 323 is coupled by fastening means 30, such as rivets or bolts and nuts, to allow the first and second pipes 10 and 20 to bend each other (see FIG. 3E). Here, even when the first and second pipes 10 and 20 and the first and second fixing brackets 310 and 320 according to the present invention are completely horizontally fastened, the first and second fixing brackets ) 310 and 320 are completely received inside the first and second pipes 10 and 20 so that the distance between the pipes is about 1 mm, which is actually the same as that of the one-piece pipe, while being able to bend.

The first and second fixing brackets 310 and 320 are in the form of pipes with one side disconnected, as in the second embodiment, and a total of four fastening holes 313 and 323 on only one side. The present invention is not limited to the shape and the number of fastening holes.

The first rotating part mounting socket 311 which protrudes horizontally in the longitudinal direction at one end of the first fixing bracket 310 is inserted into the first fixing shaft 380 rotatably in the center in a substantially rectangular plate shape. The hole 312 to be formed is formed. Similarly, a second rotating part mounting socket 321 protruding horizontally in the longitudinal direction to one side end (left side) of the second fixing bracket 320 is substantially a square plate, and has a second fixed shaft 381 at the center thereof. The hole 322 is rotatably inserted. In addition, a fixing groove 324 is formed at the center of one side of the second rotating part mounting socket 321 of the second fixing bracket 320, so that the upward fixing protrusion 352 of the second stopper rotating cam 350 may be formed. ) Is inserted and can be fixed.

The connecting plate 330 is symmetrically formed with first and second shaft holes 331 and 332 into which the first and second fixed shafts 380 and 381 are rotatably inserted, respectively, on the left and right sides. . In addition, the fixing groove 333 is formed at a predetermined distance inward from the first shaft hole 331 of the connecting plate 330, so that the downward fixing protrusion 342 of the first stopper rotary cam 340 is inserted and fixed. It is supposed to be. Here, the positions of the first and second guide cams 360 and 370 and the first and second stopper rotary cams 340 and 350 corresponding thereto may be changed up and down, and the present invention may be formed. It does not limit the location.

As shown in FIG. 3D, the guide surfaces 361 and 371 of the first and second guide cams 360 and 370 described above are downwardly inclined portions 361-1 and 371-1 and upwardly engaging portions. Three (361-2) and 371-2 are formed in the order of an angle of about 120 degrees sequentially. The locking protrusions 341 and 351 of the first and second stopper rotary cams 340 and 350 corresponding thereto are also downwardly inclined portions 341-1 and 351-1 and upwardly latching portions 341-2 ( 351-2) are sequentially formed at three angles of approximately 120 degrees. Accordingly, the position angles of the guide surfaces 361 and 371 of the first and second guide cams 360 and the engaging surfaces 341 and 351 of the first and second stopper rotary cams 340 and 350 are different. The locking projections 341 and 351 are guided along the downwardly inclined portions 361 and 371 of the guide surfaces 361 and 371, and then upwardly latching portions 361-2 and 371-311 are arranged. 2) the movement is limited. In the illustrated example, three downward inclined portions 341-1 and 351-1 and three upwardly latching portions 341-2 and 351-2 are sequentially formed at an angle of approximately 120 degrees. It is possible to more than one, and accordingly the rotation angle between the connecting plate 330 and the first rotary socket mounting socket 311 or the second rotary socket mounting socket 321 can be arbitrarily adjusted.

As such, the guide surfaces 361 and 371 of the first and second guide cams 360 and the engaging surfaces 341 and 351 of the first and second stopper rotary cams 340 and 350 corresponding thereto. By the formation of the connecting plate 330 and the first rotary socket mounting socket 311 or the second rotary socket mounting socket 321 are rotated with each other when the angle between them 180 degrees (completely unfolded in the form of a date) The base surfaces 341 and 351 are caught by the upward locking portions 341-2 and 351-2 so that they can no longer rotate, so that the actual first and second pipes 10 and 20 are 0 to 180 degrees (horizontal). State), but bending after that is impossible.

Meanwhile, in the illustrated example, a hinge structure of the first and second guide cams 360 and the first and second stopper rotary cams 340 and 350 corresponding thereto is shown by using the connection plate 330. As in the first embodiment of the present invention, a structure in which the first and second fixing brackets are interconnected using a single guide cam and a stopper rotating cam without using a connecting plate is also possible.

The first and second fixed shafts 380 and 381 are preferably formed by rivets, but the type of the first and second fixed shafts 380 and 381 is not limited in the present invention.

Reference numerals 390 and 391 denote guide cams, and 392 and 393 denote washers.

Although the present invention has been described in detail with reference to preferred embodiments, it is not intended to limit the present invention but merely to illustrate the present invention, and various changes and modifications can be made by those skilled in the art without departing from the gist and scope of the present invention. Of course, this is also within the scope of the present invention.

As described above, according to the straight folding hinge structure for pipe connection according to the present invention, the pipes are formed separately by forming a hinge that can bend the pipes while connecting the pipes in the same way as the actual integrated pipes with a distance of about 1 mm. By bending freely from 0 degrees to 180 degrees, it is possible to fold, so that when used as a skeleton of furniture, chairs, or sports equipment, the total volume can be varied by free bending, and multiple connection pipes can be bent in multiple stages when not in use. The instrument is simplified, which significantly reduces the overall volume.

Claims (11)

In the pipe connecting structure for horizontally connecting the first pipe and the second pipe, A first fixing bracket fastened in the first pipe and having a first rotating part mounting socket at one side thereof; A second fixing bracket fastened in the second pipe and having a second rotating part mounting socket at one side thereof; It is made of a folding hinge for interconnecting the first and second rotary mounting bracket so that the first fixing bracket and the second fixing bracket is foldable, The folding hinge portion, A lower end portion is inserted and fixed to be axially rotated in the hole of the first rotating part mounting socket, and an upper end is fixed shaft being inserted and fixed to be axially rotated in the hole of the second rotating part mounting socket; A guide cam inserted into the fixed shaft between the first and second rotary part mounting sockets and having a guide surface formed on an upper surface thereof; The guide cam is inserted into the fixed shaft on the guide cam and interlocked with the first and second rotating part mounting sockets to be rotatably installed, and to limit the folding angle between the first and second rotating part mounting sockets. A straight folding hinge structure for pipe connection, comprising a stopper rotating cam having a locking projection surface guided along a guide surface of the pipe. The method of claim 1, The folding angle of folding between the first fixing bracket and the second fixing bracket is 0 to 180 degrees. delete delete delete In the pipe connecting structure for horizontally connecting the first pipe and the second pipe, A first fixing bracket fastened in the first pipe and having a first rotating part mounting socket at one side thereof; A second fixing bracket fastened in the second pipe and having a second rotating part mounting socket at one side thereof; It is made of a folding hinge for interconnecting the first and second rotary mounting bracket so that the first fixing bracket and the second fixing bracket is foldable, The folding hinge portion, A connecting plate having symmetrical first and second shaft holes on left and right sides thereof, A lower end portion is inserted and fixed to be axially rotated in the first shaft hole of the connecting plate, and an upper end is inserted and fixed to be axially rotated in the hole of the first rotating part mounting socket; A lower end portion inserted into and fixed to the second shaft hole of the connection plate, and an upper end portion inserted into and fixed to rotate in the hole of the socket for mounting the second rotating portion; A first locking protrusion formed upwardly at one side of the connection plate on the side where the first shaft hole is formed; The first mounting socket and the connection plate may be formed at both ends of the arc-shaped guide side and the arc-shaped guide side of the first mounting protrusion guided at one end of the first mounting socket to limit the guide of the first locking protrusion. A first arc-shaped guide part having a first locking step for limiting a rotation angle between the first and second guide parts; A second locking protrusion formed upwardly at one side of the connection plate on the side where the second shaft hole is formed; The second mounting socket and the connection plate are formed at both ends of the arc-shaped guide side portion and the arc-shaped guide side portion at which one end of the second mounting socket is guided, thereby limiting the guide of the second locking protrusion. A straight folding hinge structure for pipe connection, comprising a second arc-shaped guide portion having a second locking step for limiting the rotation angle therebetween. delete delete In the pipe connecting structure for horizontally connecting the first pipe and the second pipe, A first fixing bracket fastened in the first pipe and having a first rotating part mounting socket at one side thereof; A second fixing bracket fastened in the second pipe and having a second rotating part mounting socket at one side thereof; It is made of a folding hinge for interconnecting the first and second rotary mounting bracket so that the first fixing bracket and the second fixing bracket is foldable, The folding hinge portion, A connecting plate having symmetrical first and second shaft holes on left and right sides thereof, A lower end portion is inserted and fixed to be axially rotated in the first shaft hole of the connecting plate, and an upper end is inserted and fixed to be axially rotated in the hole of the first rotating part mounting socket; A lower end portion is inserted into and fixed to be axially rotated on the second shaft hole of the connecting plate, and an upper end portion is inserted into and fixed to be axially rotated into the hole of the second rotating part mounting socket; A first guide cam inserted into the first fixed shaft between the first rotating part mounting socket and the first shaft hole of the connecting plate and having a first guide surface formed on a lower surface thereof; Is inserted into the first fixed shaft from the lower side of the first guide cam, the first mounting socket and the connecting plate is interlocked and installed to be rotatable, limiting the folding angle between the first mounting socket and the connecting plate A first stopper rotary cam having a first engaging projection surface guided along the guide surface of the first guide cam to an upper surface thereof; A second guide cam inserted into the second fixed shaft between the second rotating part mounting socket and the second shaft hole of the connecting plate and having a second guide surface formed on an upper surface thereof; Is inserted into the second fixed shaft on the second guide cam and the second mounting socket and the connecting plate are interlocked and installed to be rotatable, so as to limit the folding angle between the second mounting socket and the connecting plate. A straight folding hinge structure for pipe connection, comprising a second stopper rotary cam having a second locking projection surface guided along a guide surface of the second guide cam on a lower surface thereof. The method of claim 9, The first and second guide surfaces of the first and second guide cams are respectively provided with a plurality of downwardly inclined portions and upwardly engaging portions, respectively, and the engaging projection surfaces of the first and second stopper rotary cams corresponding thereto are inclined downwardly. A straight folding hinge structure for pipe connection, characterized in that the folding angle is limited after being guided along the portion to be caught in the upward locking portion. The method of claim 9, A fixing groove is formed at the center of one side of the second rotating part mounting socket, and the upward fixing protrusion of the second stopper rotating cam is inserted and fixed. A straight folding hinge structure for pipe connection, characterized in that the downward fixing projection of the stopper rotary cam is inserted.

Images