KR100596627B1 - Machine for welding steel ring for mattress - Google Patents

Abstract

The present invention relates to a ring ball welding device for a mattress, and more particularly, when the holder portion, the jig portion and the guider portion are installed on the table to automatically weld both ends of the mating ring bent in a quadrangular shape, both ends of the ring sphere are guided. The present invention relates to a mating ring welding device for a mattress, which allows a precise welding operation to be performed by holding the straight line.

Ring ball, welding, holder, jig, guider

Description

Machine for welding steel ring for mattress

1 is a view for explaining a conventional ring mat manufacturing method for a mattress.

Figure 2 is a perspective view showing a ring ball welding apparatus according to the present invention.

3 is a plan view of the present invention.

4 is a side view of the present invention.

5A-5E are operational diagrams of the present invention.

◎ Explanation of symbols for main part of drawing

1: table 1a: slit groove

10-1: Left holder 10-2: Right holder

12: holding groove 14: insertion groove

20: jig 22: pivot arm

24: Bracket 26: Center of rotation axis

28: Jig operation cylinder 28a: Piston rod

30: guider 30a: holding guide groove

30b: extension part 32: rotation center rod

34: stopper 34a: protrusion

36: spring 38: guider operating cylinder

38a: piston rod 39: power transmission arm

40: air nozzle 42: air supply

50: Slope H: Hinge

W: liner

The present invention relates to a ring ball welding device for a mattress, and more particularly, to automatically weld both ends of the mating ring ball (also called "border steel wire") bent in a square shape so that both ends of the ring ball are aligned with a guider. It relates to a mating ring welding device for the mattress by allowing the correct welding operation to be carried out.

In general, a mattress is a kind of bedding that takes a rest or sleep. Looking at its configuration, a rectangular closed loop-shaped ring is installed at the upper and lower edges to form an outer frame, and then a plurality of cushioning springs are mounted therein. Then, it is manufactured by covering the outer surface with a cloth.

Referring to the manufacturing method of the ring tool forming the outer frame of the mattress, conventionally, the ring tool was manufactured through a manual process. That is, after cutting the steel wire to a certain size as shown in Figure 1, the operator transported it to the bending roller, and then operated the bending rollers one by one to make the steel wire primary bending and secondary bending to make a square shape. Finally, both ends of the bent steel wire were welded to form a rectangular closed loop ring. However, conventionally, since the ring tool is manufactured through a manual process, the work is very inconvenient and cumbersome, and there is a problem in that productivity is low.

On the other hand, the Republic of Korea Patent No. 498120 discloses an automatic mating ring device for mattress in order to improve the problem of the method for manufacturing a ring ball according to the manual work. However, in the conventional ring ball automatic manufacturing apparatus disclosed in this patent, there is a problem in that the welding operation is not automatically performed in the process of manufacturing a rectangular closed loop ring by welding both ends of the steel wire bent in a square shape. That is, when the steel wire is automatically bent in a rectangular shape, the ends of the steel wires are not kept in a straight line with each other, but both ends of the steel wires sag downward due to twisting or self-weighting, so that the centers of both ends thereof are shifted. In order to solve the problem, the operator has to push both ends of the steel wire bent in a square shape into the welding part of the welding machine to fit the center. Of course, if the automatic welding is not carried out in the automatic ring-guarge production apparatus, there is a problem that the productivity and workability of the ring-hole is significantly reduced.

The present invention has been made in order to solve the problems described above, the object is to automatically weld both ends of the steel wire bent in a square shape installed on the production line of the ring to improve the productivity of the mating ring The present invention provides a ring welding device for a mattress.

Another object of the present invention is to hold both ends of the ring-shaped steel wire bent in a rectangular shape through the corresponding holder and jig to perform electric welding, so that both ends of the steel wire can always be held in the correct position using the guider means The present invention provides a ring-hole welding device for a mattress with a minimum welding failure rate.

Ring mat welding device for mattress according to the present invention for achieving the above object is installed to selectively flow the current on the table, divided into the left holder and the right holder, the holding groove is formed on the front of each holder is square Holder portions provided at both ends of the ring-formed steel wire bent in a shape so as to be positioned on the same line as each other, respectively inserted into the corresponding holding groove; A jig part for fixing both ends of the steel wire to the holding groove by selectively pressing both ends of the steel wire respectively inserted into the corresponding holding grooves while the jig is moved; And a guider part for pushing and guiding both ends of the steel wire so that the guider moves first so that both ends of the steel wire are accurately positioned at the center of the corresponding holding groove before the jig presses the steel wire.

And the holding groove is formed in a V-shape, the center is characterized in that the semi-circular insertion groove is formed in which the steel wire is inserted to increase the contact area between the steel wire and the holder.

And the guider is configured to guide both ends of the steel wire to the center of the corresponding holding groove, respectively, by the reciprocating direction in the front and rear direction by the guider operation means along the slit groove formed on the table, the guider operation means is coupled to the guider rotation A rotary center rod that is supported and reciprocally moved forward and backward, and a guide rod installed on a portion of the table, and the piston rod is connected to the rotary center rod to reciprocate the rotary center rod back and forth by the expansion and contraction action of the piston rod. A stopper that limits the rotation of the guider so that it does not fall backward when pushing the steel wire when the guider is upright, and is connected to a part of the guider to provide the force to keep the guider always upright by restoring force Characterized in that it comprises a spring to Shall be.

And the jig is configured to press the steel wire in the holding groove while descending downward from the upper portion of the holder by the jig operating means, the jig operating means is a rotation center axis installed through the bracket on the top of the table, the rotation center axis It is installed to be rotatable, the lower end portion of the rotating arm formed with the jig, and the end of the piston rod is hinged to the upper portion of the rotating arm, by the expansion and contraction of the piston rod pushes and pulls the upper end of the rotating arm It characterized in that it comprises a jig operation cylinder for selectively rotating forward or reverse rotation.

The object of the present invention described above will become more apparent from the preferred embodiment of the present invention described below with reference to the accompanying drawings.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 2 is a perspective view showing a ring ball welding apparatus according to the present invention, Figures 3 and 4 are a plan view and a side view, Figures 5a to 5e is an operation of the present invention.

2 to 4, the ring ball welding device for a mattress according to the present invention is provided with a table (1) for supporting the ring wire steel (W) bent in a square shape. And holder part, jig part, and guider part is installed on the table 1, and when the ring-shaped steel wire W is bent in a square shape on the table 1, the both ends are automatically welded to each other.

The holder part is divided into a left holder 10-1 and a right holder 10-2 for accommodating both ends of the ring-shaped steel wire W bent in a square shape, and each holder 10-1 and 10-. The holding groove 12 is formed on the front of 2). Here, the holding groove 12 is preferably configured to have a V-shape, that is, both ends of the steel wire (W) received by the holding groove 12 is guided to the center of the holding groove 12 to be placed on the same line with each other It is to make it possible. In addition, a semicircular insertion groove 14 is formed in the center of the V-shaped holding groove 12 to increase the contact area between the steel wire and the holder, which is to increase the efficiency of welding. In addition, one or both of the left holder 10-1 and the right holder 10-2 are installed to be movable through the cylinder 16 in the left and right directions. This is for welding selectively contacting both ends of the steel wires W respectively held by the corresponding holders in cooperation with the jig part. One of the left holder 10-1 and the right holder 10-2 is connected to the + pole and the other of the left holder 10-1 and the right holder 10-2 is installed to selectively flow current.

The jig part presses both ends of the steel wire W inserted into the corresponding holding groove 12 while the jig 20 moves into the holding groove 12 by the jig operation means, so that both ends of the steel wire W are held by the holding groove ( 12) is configured to be fixed. Here, the jig 20 is preferably configured such that the pressing surface has the same arc shape as the steel wire W so that the steel wire W can be reliably pressed.

Jig operation means is installed on the upper portion of the table (1) through the center of rotation shaft 26, the rotation center around the rotation center axis 26, the jig 20 is integrally installed at the lower portion Rotating arm 22 formed by the end portion of the piston rod 28a is hinged (H) is coupled to the upper end portion of the rotating arm 22 is the upper end of the rotating arm 22 by the expansion and contraction of the piston rod (28a) It comprises a jig actuating cylinder 28 for selectively rotating or rotating the pivoting arm 22 while pushing and pulling. That is, when the piston rod 28a is extended, the pivot arm 22 rotates forward about the rotation center axis 26 and the jig 20 descends downward from the top of the holders 10-1 and 10-2. When the piston rod 28a is reduced, the pivoting arm 22 reversely rotates about the rotation center axis 26, and the jig 20 is lifted upward in the upcoming direction. Departure from within the groove (12).

Before the jig 20 pressurizes the steel wire W, the guider portion of the steel wire W is moved so that the guider 30 is moved by the guider operation means so that both ends of the steel wire are accurately positioned at the center of the corresponding holding groove 12. It is configured to guide by pushing both ends. That is, the slit groove 1a is formed long on the table 1 in the front-rear direction, and the guider 30 is installed to reciprocate by the guider operation means along this slit groove 1a, and the guider 30 is moved back and forth. It is configured to guide both ends of the steel wire (W) to the center of the corresponding holding groove 12, respectively with a selective reciprocating movement in the direction. At this time, in the guider 30, a holding guide groove 30a having a shape symmetrical with the holding groove 12 is formed at a portion pushing the steel wire W, and when the steel wire W is pushed against the holding groove 12, It is preferable to configure the steel wire W to be guided precisely to the center of the holding groove 12 by cooperation.

The guider operation means comprises a rotation center rod 32, a guider operation cylinder 38, a stopper 34, a spring 36. That is, the rotation center rod 32 is installed to reciprocate in the front and rear direction at the bottom of the table 1, the guider 30 is coupled to each end is rotatably supported. A portion of the rotation center rod 32 is integrally formed with the power transmission arm 39 bent at a right angle, and the piston rod 38a of the guider operation cylinder 38 is connected to the lower end of the power transmission arm 39. . Therefore, when the piston rod 38a is contracted, the guider 30 moves together with the rotation center rod 32 in the holder direction, and when the piston rod 38a is extended, the guider 30 together with the rotation center rod 32 is connected with the holder. And move in a direction away. And the lower portion of the rotary center rod 32 is provided with a stopper 34 installed to be movable together with the rotary center rod 32, the stopper 34 and the rotary center rod 32 in the state that the guider 30 is standing vertically When moving backwards (away from the holder), it is possible to be caught by the end of the slit groove (1a) to fall forward, but to move forward (in the direction closer to the holder) when moving the steel wire guider (30) ) Is installed to limit the rotation. And the spring 36 is installed between the guider 30 and the stopper 34 so that the guider 30 is always kept vertically upright. That is, an extension piece 30b extending downward is integrally formed in a part of the guider 30, and a protrusion piece 34a is integrally formed in one part of the stopper 34, and one end of the spring 36 is formed. The other end of the silver extension piece (30b) is connected to the protruding piece (34a) is configured to pull the guider (30). Therefore, when the guider 30 moves backward and moves forward with the rotation center rod 32 to serve as the guider 30 in the state of being sloped forward by the end of the slit groove 1a, at the same time the spring The vertical force is maintained by the restoring force of (36). In the present invention, the guider 30 is hidden under the table 1 and is configured to protrude upward. When both ends of the steel wire are guided to the holding groove 12 while the ring steel wire W is bent in a square shape, the guider 30 is guided to the holding groove 12. It is for preventing the interference with (30).

On the other hand, the present invention is configured so that the air nozzle 40 is installed between the left holder 10-1 and the right holder 10-2 to supply cold air to the welded part when welding of both ends of the steel wire is completed. This is to prevent the deformation, such as distortion in the welded portion if heat is left in the welded portion when the welded ring is transferred to the loading position. Here, the configuration of the air supply unit 39 for supplying air through the air nozzle 40 may be a known method such as a compressor.

In addition, the present invention is a guide inclined plate installed inclined downward in the direction of the holder from the top so that both ends can be guided into the holding groove 12 while the ring steel wire (W) is bent in a square shape at predetermined intervals on both sides of the holder portion ( 50) is additionally installed.

Now, the operation and operational effects of the present invention thus constructed will be described.

First, the present invention, as shown in Figure 5a, the ring-shaped steel wire (W) is bent in a square shape, the holding grooves 12 of the left holder 10-1 and the right holder 10-2 corresponding to both ends thereof, respectively. You are guided to. At this time, the guide inclined plate 50 helps both ends thereof to be guided into the holding groove 12 when the ring steel wire (W) is bent, the guider (30) to prevent interference with the ring steel wire (W) It is caught by the end of the slit groove (1a) to hide under the table (1).

In this state, if the welding operation is to be executed, as shown in FIG. 5B, the guider 30 first moves forward and pushes both ends of the ring-shaped steel wire W, and then guides to the holding guide groove 30a of the guider 30. Both ends of the steel wire (W) is guided to the correct center while being in close contact with the holding groove 12 of the corresponding left and right holder (10-1) (10-2). Here, the operation relationship of the guider 30 moving forward is explained in more detail. When the piston rod 38a of the guider operation cylinder 38 is contracted, the rotation center rod 32 connected to the power transmission arm 39 is advanced. With this, the guider 30 is advanced. In this way, when the guider 30 moves forward and exits from under the table 1, the guider 30 is maintained vertically by the restoring force of the spring 36, and thus the steel wire W can be pushed. Will be maintained.

Next, when both ends of the ring steel (W) is guided to the center of the corresponding holding groove 12, as shown in Figure 5c jig 20 is lowered from the upper end of both ends of the ring steel (W) It is fixed so as not to flow while pressing close to the holding groove (12). That is, when the piston rod 28a of the jig operation cylinder 28 is pushed and pushes the upper end of the rotation arm 22, the rotation arm 22 rotates about the rotation center axis 26 and the jig 20 at the bottom thereof. ) Will move into the holding groove 12, and thus the jig 20 will press the steel wire (W).

Next, when both ends of the ring steel wire (W) is fixed to the holding groove 12 by the jig 20, as shown in Figure 5d, the guider 30 moves back to the bottom of the table (1) It hides and supplies an electric current to the left holder 10-1 and the right holder 10-2 to make current flow. At the same time as supplying the current, as shown in FIG. 5E, as the cylinder 16 is operated, any one holder is moved in the left and right directions so that both ends of the steel wires which are separated from each other push the ends of the steel wires. Then, when both ends of the steel wire is in contact with the current flows instantaneously to the portion, the resistance heat is generated, and both ends are locally melted by this heat is joined to each other to complete the welding operation. Of course, when the welding operation is completed, the jig 20 is moved upward again, and the welding operation of the next ring steel wire is continuously performed as described above.

Since the present invention is automatically carried out by the ring ball welding operation, the device can be automatically produced by the continuous process from the bending of the steel wire to the welding operation if the device is applied to the automatic ring ball manufacturing apparatus.

In particular, the present invention is guided by the inclined guide plate when the two ends of the steel wire is bent in a square shape guided by the holding groove of the holder to help guide both ends of the steel wire accurately into the holding groove, and jig When the jig is bent and guided into the holding groove, the jig is positioned at the top of the holder and the allure guider is hidden under the table so that no interference occurs between the wire and the jig and the guider, thus accurately guiding the wire into the holding groove. You can do it.

In addition, in the present invention, since the steel wire insertion groove is formed in the center of the holding groove, when both ends of the steel wire are guided into the holding groove, the contact area between the holder and the steel wire is increased while being inserted into the insertion groove, thus the steel wire is stable in the holding groove. In addition to being fixed with, as the contact area is increased, the current flows well, which increases the welding efficiency.

In addition, the present invention is because the cold air is supplied directly to the welding portion through the air nozzle at the same time as the welding operation is completed, the deformation of the welding portion when the ring is moved to the loading position while the welding portion is immediately cooled as soon as the welding is completed. There is an advantage to prevent.

As described above, in the present invention, when the steel wire for the ring ball is bent in a square shape and both ends thereof are guided to the holding grooves of the holder, the workability is improved because the welding work is automatically performed, and this is applied to the automatic ring ball manufacturing apparatus. As a result, the productivity and the work efficiency of the ring tool are improved because all the manufacturing processes of the link are automatically executed.

In addition, in the present invention, when both ends of the ring steel wire is inserted into the holding groove of the holder and fixed through the jig, the guider first guides both ends of the steel wire accurately to the center of the holding groove, so the steel wire is always in the correct position. The holding operation is possible, and thus, there is an effect of minimizing the welding failure rate generated by displacing the contacts at both ends of the steel wire and improving the working speed.

While the invention has been shown and described in connection with specific embodiments as described above, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

Claims (6)

A current is selectively installed on the table, and is divided into a left holder and a right holder, and holding grooves are formed on the front of each holder, and both ends of the ring steel wire bent in a square shape are respectively provided in corresponding holding grooves. A holder part inserted to be positioned on the same line as each other; A jig part for fixing both ends of the steel wire to the holding groove by selectively pressing both ends of the steel wire respectively inserted into the corresponding holding grooves while the jig is moved; And Ringer welding device for mattresses comprising a guider for pushing the both ends of the steel wire to guide the jig first to press the steel wire so that both ends of the steel wire to be accurately positioned in the center of the holding groove corresponding to. The method of claim 1, The holding groove is formed in a V-shape, ring center welding device for mattresses, characterized in that the center is formed with a semi-circular insertion groove is inserted into the steel wire to increase the contact area between the steel wire and the holder. The method according to claim 1 or 2, The guider is configured to guide both ends of the steel wire to the centers of the corresponding holding grooves while being selectively reciprocated in the front and rear directions by the guider operating means along the slit groove formed on the table, The guider operation means A rotary center rod coupled to the guider to be rotatably supported and installed to reciprocate in the front and rear directions; A guider operation cylinder installed at a part of the table, the piston rod being connected to the rotation center rod to reciprocate the rotation center rod back and forth by the expansion and contraction action of the piston rod, A stopper for limiting rotation of the guider so that the guider does not fall backward when the steel wire is pushed in a vertical state; Ringer welding device for mattresses, characterized in that it comprises a spring installed connected to a portion of the guider to provide a force to keep the guider always upright by the restoring force. The method according to claim 1 or 2, The jig is configured to press the steel wire in the holding groove while descending downward from the upper portion of the holder by the jig operation means, The jig operation means A center of rotation installed through the bracket on the top of the table, Rotating arm is installed to be rotatable about the center of rotation, the lower portion of the rotating arm and the jig is formed, An end of the piston rod is hinged to the upper portion of the rotating arm, and comprises a jig operation cylinder for selectively rotating or rotating the rotating arm selectively by pushing and pulling the upper end of the rotating arm by the expansion and contraction of the piston rod. Ring ball welding device for mattress. The method of claim 1, Ring holder welding device for the mattress is characterized in that the guide inclined plate is installed inclined downward in the holder direction from the upper side so that both ends of the holder is bent in a square shape as the steel ring for bending is guided into the holding groove. The method of claim 1, Air nozzle is installed on the portion of the steel wire is welded ring mattress welding device, characterized in that configured to selectively supply cold air to the welding portion.

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