KR19980028036U - Microwave Front Panel Welding Equipment - Google Patents

Abstract

The present invention relates to a device for welding the front panel forming the front of the microwave oven and the housing housing the food. In the microwave front panel welding apparatus according to the present invention, in welding a pair of first flanges provided around an opening of a housing to a front panel, the first flanges are automatically supplied by feeding the housing and the front panel into the welding machine. Since the welding is performed at the same time, the welding work between the housing and the front panel can be performed quickly and contribute to reducing the safety accident of the operator.

Description

Microwave Front Panel Welding Equipment

The present invention relates to a front panel welding apparatus of a microwave oven for welding the front panel forming the front surface of the microwave oven to the housing housing the food.

In the process of manufacturing a microwave, there is provided a process of welding a housing for storing food to be cooked and a front panel located at an opening side of the housing and to which a door or an operation panel is coupled. The housing is provided with a pair of first flanges 21 and a pair of second flanges 22 as schematically shown in FIG. 1, and the first flanges 21 and the second flanges 22 are provided. By welding these to the front panel 10, the welding of the housing 20 and the front panel 10 is performed. The first flanges 21 are formed side by side in a position opposite to each other with the rectangular opening 25 of the housing 20 therebetween, and the second flanges 22 with respect to the first flanges 21. They are orthogonal and are formed side by side at opposite positions with the opening 25 interposed therebetween.

A conventional process of welding the front panel 10 to the first flanges 21 of the housing 20 will be described.

First, an operator located in front of a welding machine having one upper electrode and one lower electrode corresponding to the upper electrode, the first flanges 21 and the second flanges 22 of the front panel 10 The housing 20 and the front panel 10 which are overlapped to contact the rear surface are introduced into the welding machine, and the first flange of any one of the first flanges 21 is positioned between the upper and lower electrodes of the welding machine. Then, by operating the welding machine to move the upper electrode and the lower electrode relative to the direction approaching each other, the upper electrode is in close contact with the first flange sandwiched between the upper and lower electrodes and the lower electrode is in close contact with the front panel 10 do. When a potential is applied between the electrodes in this state, the first flange closely contacted with the upper electrode is electrically welded to the front panel 10. In this way, when the first flange of any one of the first flanges 21 is welded to the front panel 10, the worker withdraws the housing 20 and the front panel 10 from the welding machine, and again the housing 20 And by rotating the front panel 10 by 180 degrees to the welding machine, by welding the other first flange of the first flange 21, which is not welded to the front panel 10, to the front panel 10, The front panel is welded to the first flanges 21 of the housing 20.

However, according to the conventional welding method as described above, in order to weld the pair of first flanges to the front panel, the housing and the front panel overlapped with each other have to go through the process of taking out and withdrawing the welding machine twice, The welding work between the housing and the front panel is quite cumbersome and requires a lot of time. In addition, since the operator must directly input and withdraw the overlapping front panel and the housing several times, there is a problem of high safety accidents.

The present invention has been devised to solve such a problem, and the front panel welding apparatus of the microwave oven has been improved so that the operation of welding the microwave front panel to the housing can be quickly performed, and the risk of safety accidents can be reduced. The purpose is to provide.

1 is a schematic separation perspective view of a housing and a front panel of a microwave oven;

2 is a schematic plan view of a welding system employing a microwave front panel welding apparatus according to the present invention,

3 is a schematic exploded perspective view of the turntable and parrot shown in FIG. 2, FIG.

Figure 4 is an enlarged view of the front panel welding device portion shown in Figure 2,

5 is a schematic cross-sectional view taken along line V-V of the front panel welding apparatus shown in FIG.

6 is a view showing a state in which the lifting body shown in FIG.

7 is a view showing a state in which the parrot shown in FIG. 6 is moved to the welding position,

8 is a view seen from the direction A of FIG.

FIG. 9 is a schematic front view of the housing / front panel outlet shown in FIG. 2; FIG.

Explanation of symbols for main parts of the drawings

100 ... Front Panel Welding Machine 101 ... Frame

110 Turntable 111 Positioning pin

120 ... farad 121 ... positioning hole

Positioning pins 122, 124

127 ... Resection 128 ... magnetic material

140 Welding machine 140a, 140b Welding head

141,143 ... upper electrode 142,144 ... lower electrode

150 ... lifting body 159 ... cylinder

160.Moving body 170 ... Pneumatic cylinder

190 Pneumatic cylinder 200 Finishing weld

300 ... Housing / Front Panel Outlet

10 Front panel 20 Housing

21 ... 1st flange 22 ... 2nd flange

25 ... opening

In order to achieve the above object, the front panel welding apparatus of the microwave oven according to the present invention includes a pair of first flanges formed side by side at opposite positions with the openings interposed around a rectangular opening of a housing in which food is stored. And a front panel forming a front surface of a microwave oven, the frame, a turntable intermittently rotatable on the frame, and a housing to be welded on the turntable and the front panel to be welded to each other. A parrot supporting the overlapping part, and a parrot placed on the turntable and transferred to a predetermined first position by rotation of the turntable, to a welding position outside the turntable, and also moving the parrot from the welding position again to the first position. A parrot conveying portion for conveying to a position and a first of the housing on the parrot conveyed to the welding position A by comprising a welding means for welding the oven at the same time on the front panel that is characterized.

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

2 is a schematic plan view of a welding system employing a front panel welding apparatus of a microwave oven according to the present invention. Referring to FIG. 2 together with FIG. 1, the front panel welding system of the microwave oven is broadly divided into a front panel according to the present invention for welding the first flanges 21 of the housing 20 to the front panel 10. A welding device 100, a finish welding part 200 for welding the second flanges 22 of the housing 20 to the front panel 10, and welding through the first flanges 21 in the welding device 100. The housing 20 and the front panel 10 are provided with a housing / front panel discharge part 300 for discharging to the finish welding part 200 side.

As shown in FIG. 4, the welding device 100 according to the present invention includes a frame 101, a turntable 110, a parrot 120, and a welder 140. The turntable 110 is coupled to the vertical axis 101a installed on the frame 101, and intermittently at predetermined angle intervals around the vertical axis 101a by a motor (not shown) installed on the frame 101. Can be rotated. The parrots 120 are placed on the turntable 110 at the predetermined angle intervals. Each parrot 120 is placed to overlap the front panel 10 and the housing 20 to be welded to each other, the front panel supported on the parrot 120 and each parrot 120 during the rotation of the turntable 110 10 and the housing 20 are also supplied to a position (hereinafter referred to as a first position) adjacent to the welder 140 while being moved on a trajectory around the vertical axis 101a.

As shown in FIG. 3, a plurality of positioning holes 121 are formed in each parrot 120, and positioning pins 111 formed in the turntable 110 are fitted into each positioning hole 121. . By the positioning holes 121 and the positioning pins 111, the horizontal movement is suppressed in the state where each parrot 120 is placed on the turntable 110. On the other hand, when an external force is applied upward to each parrot 120, the parrot 120 rises along the longitudinal direction of the positioning pins 111 and is separated from the turntable 110, thereby allowing horizontal movement. On the parrot 120, there are also positioning pins 122 for positioning of the front panel 10 and positioning tools 123, 124 for positioning of the housing 20 stacked on the front panel 10. It is prepared. These positioning spheres 123 and 124 are positioned to face the inner surface of the housing 20, respectively. The positioning tool 124 of one of the positioning tools 123 and 124 is preferably installed to be able to move forward and backward with respect to the inner surface of the housing 20 which the positioning tool 124 faces. For this purpose, the forward and backward positioning tool 125 is moved forward and backward with respect to the inner surface of the housing 20 to the support 125 fixed to the parrot 120, as shown in Figs. It is slidably coupled in a direction, and is elastically biased by the spring 129 in a direction to be retracted with respect to the inner surface of the housing 20. In addition, a pair of ablation portions 127 are formed in the parrot 120 so that the pair of lower electrodes 142 and 144 described later can pass through.

The welder 140 is installed at a position spaced apart from the turntable 110 by a predetermined distance, and as shown in FIGS. 5 to 8, a pair of welding heads 140a and 140b are disposed to be spaced apart from each other. Is provided as a welding means to be described later. The welding heads 140a and 140b are interlocked with each other to operate simultaneously on a predetermined driving source. Each of the welding heads 140a and 140b includes upper electrodes 141 and 143 and lower electrodes 142 and 144, and each of the lower electrodes 142 and 144 is positioned vertically below the corresponding upper electrodes 141 and 143. The upper electrodes 141 and 143 and the lower electrodes 142 and 144 are installed to be relatively moved in a direction in which they are approached and spaced apart from each other by a driving source such as the cylinder 149. The upper electrodes 141 and 143 are mechanically connected to each other so that the upper electrodes 141 and 143 rise and fall simultaneously when the driving source is operated.

In the microwave front panel welding apparatus 100 according to the present invention, the parrot 120 transferred to the first position is also located at the first position and the welding position in the welder 140, that is, on the parrot 120. The first conveyer 21 of the housing 20 is provided with a parrot transfer unit for reciprocating transfer between the position between the upper electrode (141, 143) and the lower electrode (142, 144) of the respective welding head (140a, 140b).

In this embodiment, as the parrot conveying unit, as shown in Figs. 5 to 7, the moving body 160 and the lifting body 150 provided in the moving body 160 are provided. The movable body 160 is fixed to the output end 192 of the pneumatic cylinder 190, which extends along the reciprocating direction of the parrot 120 between the turntable 110 and the welder 140. The pneumatic cylinder 190 acts as a moving actuator for reciprocating the moving body 160, the output end 192 of the pneumatic cylinder 190 is the cylinder according to the inflow direction of the compressed air into the cylinder body 191 The body 191 is to be reciprocated in the longitudinal direction. The elevating body 150 is provided to be movable up and down on the movable body 160 and lifts the parrot 120 on the first position when the elevating body 150 is elevated. As a lifting and lowering actuator for lifting up and down the lifting body 150, a pneumatic cylinder 170 provided on the moving body 160 is provided. The rod of this pneumatic cylinder 170 is fixed with respect to the lifting body 150. On the upper surface of the lifting body 150, a plurality of positioning pins respectively inserted into the positioning holes 126 of the parrot 120 to fix the position of the parrot 120 is lifted by the lifting body 150 151 protrudes and a plurality of guide rods 152 are fixed to the lower side. The guide rod 152 is slidably fitted to the guide bearing 161 fixed to the movable body 160. A cylinder 159 is also provided at the upper portion of the lifting body 160, which is capable of moving back and forth with respect to the inner surface of the housing 20 among the positioning holes 123 and 124 installed in the parrot 120. The sphere 124 is used as a driving source for bringing the sphere 124 into close contact with the inner surface of the housing 20.

Meanwhile, the housing / front panel discharge part 300 is a vacuum adsorption pad 310 that vacuum-adsorbs the housing 20 and the front panel 10 welded through the first flanges 21 from the front panel welding apparatus 100. ), A lift drive source for elevating the vacuum suction pad 310, and a reciprocating drive source for reciprocating the vacuum suction pad 310 between the front panel welding device 100 and the finish welding part 200. have.

The vacuum adsorption pad 310 is to absorb an object in close contact with the suction force of a vacuum formed therein, and is provided to be movable on the movable block 320. As a lifting and lowering drive source for elevating the vacuum suction pad 310 with respect to the movable block 320, a cylinder 330 provided in the movable block 320 is provided. The movable block 320 is fixed to the output end 352 of the pneumatic cylinder 350, which is disposed between the front panel welding apparatus 100 and the finish welding portion 200 long. The pneumatic cylinder 350 acts as a reciprocating driving source for reciprocating the vacuum suction pad 310, and the output end 352 of the pneumatic cylinder 350 reciprocates in the longitudinal direction of the cylinder body 351. Will be.

On the other hand, the parrot 120 is made of a non-ferrous metal such as aluminum in consideration of workability and light weight, the housing 20 and the front panel 10 adsorbed by the vacuum adsorption pad 310 from the parrot 120 To prevent the parrot 120 from being lifted from the turntable 110 when lifted, a magnetic body 128 is attached to the bottom of the parrot 120 as shown in FIGS. 3 and 9, and the turntable 110. 9), a magnet 108 is installed to be able to move forward and backward with respect to the magnetic body 128 of the parrot 120 as shown in FIG. 9, and the magnet 108 is moved forward and backward with respect to the magnetic body 128. The cylinder 109 is provided as a means to make it.

Hereinafter, a process in which the microwave oven front panel 10 and the first flanges 12 of the housing 20 are welded by the front panel welding apparatus 100 will be described.

First, as shown in FIG. 2, among the parrots 120 placed on the turntable 110, the front panel 10 is located at the fart that is located farthest from the welder 140. Let go. Thus, the front panel 10 placed on the parrot 120 is fixed by the positioning pins 122, as shown in Figure 3, the movement in the horizontal direction is suppressed. Thereafter, when the turntable 110 is rotated 90 degrees clockwise in the drawing, the parrot supporting the front panel 10 is transferred to a position rotated 90 degrees clockwise. In this state, the housing 20 is placed above the front panel 10 on the parrot. At this time, the housing 20 is fixed by the positioning spheres 123 and 124 to prevent movement in the horizontal direction, the first flange portion 21 and the second flange portion 22 of the housing 20 It comes in contact with the front panel 10 under the housing 20. When the front table 10 and the housing 20 are overlapped and supported on the parrot 120 in this way, when the turntable 110 is rotated 90 degrees clockwise again, the front panel 10 and the housing 20 are rotated. The parrot supporting 20 is transferred to the first position adjacent to the welder 140 by the rotation of the turntable 110, and is positioned vertically above the lifting body 150 as shown in FIG.

As such, when the parrot 120 supporting the front panel 10 and the housing 20 is positioned vertically above the lifting body 150, the pneumatic cylinder 170 operates to lift the lifting body (as shown in FIG. 6). 150 is raised relative to the movable body 160. As such, the lifting body 150 lifts the parrot 120 from the turntable 110 while the lifting body 150 rises, and at this time, the positioning pin 151 on the lifting body 150 becomes a parrot ( The parrot 120 is fixed while being inserted into the positioning hole 126 of the 120. After that, the cylinder 159 installed above the lifting body 150 is operated to press the positioning tool 124 of the parrot 120, and the positioning tool 124 compresses the spring 129. While close to the inner surface of the housing 20 while fixing the position of the housing 20 more firmly.

In this way, after the parrot 120 supporting the front panel 10 and the housing 20 so as to overlap each other is lifted by the lifting body 150, the pneumatic cylinder 190 is operated so that the output end 192 is a cylinder body ( 191 is moved to the welder 150 side as shown in FIG. At this time, the movable body 160 fixed to the output end of the pneumatic cylinder 190 and the lifting body 150 installed in the moving body 160 are moved to the welding machine 140 side together with the output end 192, and the lifting body 150 The parrot 120 on) is moved to the welding position. Accordingly, the parrot 120 front panel 10 and the housing 20 are positioned between the welding heads 140a and 140b as shown in FIG. 8 and the first flange 21 of the housing 20. They are positioned between the upper electrodes 141 and 143 and the lower electrodes 142 and 144 of the welding heads 140a and 140b, respectively. When the cylinder 159 is operated in this state and the rod is retracted, the positioning tool 124 is retracted from the inner surface of the housing 20 by the restoring force of the spring 129. Thereafter, when the lifting body 150 is lowered by operating the pneumatic cylinder 170, the upper panel 10, the housing 20, and the front panel 10 placed on the parrot 120 are lowered together. do. As the lifting member 150 descends as described above, the lower electrodes 142 and 144 start to protrude relative to the upper surface of the parrot 120 through the cutouts 127 formed in the parrot 120. It comes in contact with the bottom surface of the front panel 10 on the 120. In addition, if the descending of the lifting member 150 continues, the parrot 120 continues to descend, but the front panel 10 and the housing 20 on the front panel 10 are placed on the lower electrodes 142 and 144. As the state no longer falls. Thereafter, the upper electrodes 141 and 143 are simultaneously lowered by the driving source such as the cylinder 149 to contact the first flanges 21, respectively, and the upper electrodes 141 and 143 correspond to the upper electrodes 141 and 143, respectively. A potential is applied to the lower electrodes 142 and 144 so that the pair of first flanges 21 are simultaneously welded to the front panel 10. Meanwhile, in the above description, the lifting body 150 is lowered and placed on the lower electrodes 142 and 144 of the front panel 10 and the housing 20, but the lower electrodes instead of the lifting body 150 are lowered. 142 and 144 may be raised by a driving source such as a cylinder (not shown) in the welder 140 such that the front panel 10 and the housing 20 may be placed on the rising lower electrodes 142 and 144.

As such, when the first flanges 21 of the housing 20 are welded to the front panel 10, the upper electrodes 141 and 143 rise, and the lifting body 150 moves to the pneumatic cylinder. It is raised by 170 to lift the parrot 120. As described above, the front panel 10 placed on the lower electrodes 142 and 144 and the housing 20 above the front panel 10 are placed on the parrot 120 while the parrot 120 is lifted. Will rise with). Then, the cylinder 159 is operated in the state in which the lifting body 150 is completed to bring the positioning tool 124 back into close contact with the inner surface of the housing 20, and by the operation of the pneumatic cylinder 190, the moving body ( 160 is again positioned below turntable 110 as shown in FIG. In this state, the lifting body 150 is lowered by the pneumatic cylinder 170, and the parrot 120, which was placed on the lifting body 150, is again shown in FIG. Placed in position and supported.

Thereafter, when the turntable 110 is rotated 90 degrees clockwise again, the parrot 120 supporting the front panel 10 and the housing 20 welded through the first flanges 21 is formed in the first direction. The front panel 10 and the housing 20 are discharged to the finishing work unit by the vacuum suction pad at the position rotated 90 degrees clockwise from one position.

As can be seen from the description of the above embodiment, when the front panel welding apparatus of the microwave oven according to the present invention is adopted, the housing 20 and the front panel 10 to be welded are automatically supplied to the welding means without the operator's effort. In addition to being drawn out, the pair of first flanges 21 provided in the housing 20 may be welded to the front panel 10 at the same time by the welding means. Therefore, the safety accident of the worker can be prevented in advance, and the welding work of the housing 20 and the front panel 10 can be performed quickly, thereby greatly contributing to the improvement of productivity.

The front panel welding apparatus of the microwave oven of the present invention is not limited to the configuration of the above-described embodiment, the front panel welding device having a variety of forms within the scope without departing from the claims of the present invention is easily configured by those skilled in the art Could be.

As described above, in the microwave front panel welding apparatus according to the present invention, in welding a pair of first flanges provided around the opening of the housing to the front panel, the housing and the front panel are automatically supplied into the welding machine. Since the flanges are configured to be welded to the front panel at the same time, the welding work between the housing and the front panel can be performed quickly and contribute to reducing the safety accident of the operator.

Claims (4)

In order to weld the front panel which forms the front surface of a microwave oven to a pair of 1st flanges formed in parallel with the opening in the opposite position around the rectangular opening of the housing which accommodates food, Frame, A turntable rotatably installed on the frame; A parrot placed on the turntable and supporting the housing and the front panel to be welded to each other; A parrot conveying part placed on the turntable and conveyed to a welding position outside the turntable by a parrot conveyed to a predetermined first position by rotation of the turntable, and transferring the parrot from the welding position back to the first position; , And welding means for simultaneously welding the first flanges of the housing on the parrot transferred to the welding position to the front panel. The method of claim 1, wherein the parrot transfer unit, A movable body slidably installed along the reciprocating direction of the parrot, An elevating body which is installed on the movable body so as to be able to elevate below the parrot on the first position and lifts the parrot from the turntable when the elevating body is raised; An actuator for elevating the elevating body; And a moving actuator for reciprocating the moving body such that the parrot lifted by the lifting body reciprocates between the first position and the welding position. The method of claim 1, The parrot is provided with a plurality of positioning tools respectively facing the inner surfaces of the housing, At least one positioning tool of the plurality of positioning tools is elastically biased in a direction to be retracted and installed to be forward and retractable with respect to the inner surface of the housing facing it, And a cylinder for advancing the elastic biased positioning tool toward the inner surface side of the housing facing the positioning tool. The method of claim 1, The welding means has a pair of welding heads spaced apart from each other, Each welding head is positioned above the upper electrode vertically above the first flange of the housing placed in the parrot transferred to the welding position, and is positioned vertically below the upper electrode with the housing and the front panel interposed therebetween. A front panel welding apparatus comprising a lower electrode that is relatively accessible and spaced apart from the electrode.