KR100991006B1 - Sealer having safe running function of sealing bar - Google Patents

Abstract

PURPOSE: A thermal sealing apparatus having a safety lifting function for a sealing bar is provided to release compression quickly when objects such as worker's fingers are trapped. CONSTITUTION: A thermal sealing apparatus having a safety lifting function for a sealing bar comprises a base(110), a rotation support bracket(116), a hinge shaft(118), an arm(120), a lift driving part(126), a vertical sliding bar(130), a sensing switch(134), and a controller. A lower sealing bar(112) and a band heater(114) are installed on the base. The rotation support bracket has a vertical sliding hole. The hinge shaft is inserted in the sliding hole of the rotation support bracket and moves up and down. The arm is coupled with the hinge shaft and hinged on the upper end of a lift driving bar. The lift driving part generates a driving force and transfers the driving force through the lift driving bar to the arm. The vertical sliding bar is elastically supported upward by an elastic spring in the normal times and pushed down by the rear part of the arm or the hinge shaft lowered by the seesaw motion caused by the reaction when an upper sealing bar(122) contacts an object inserted between the upper sealing bar and the lower sealing bar. The sensing switch senses the down motion of the sliding bar and transmits a sensing signal to the controller.

Description

Heat sealing device with safety lifting function of sealing bar {SEALER HAVING SAFE RUNNING FUNCTION OF SEALING BAR}

The present invention relates to a heat sealing device for sealing an opening of a bag made of a plastic material by applying pressure and high heat, and more particularly, when a worker's finger or other external object is caught during the lowering operation of the upper sealing bar. The present invention relates to a heat sealing device having a safety lifting function of a sealing bar capable of quickly and accurately detecting and immediately rising back to prevent a safety accident such as crimping.

In general, the heat sealing device is a device for heat-sealing and sealing an opening of a bag made of a vinyl material containing a package, and is widely used for packaging various foods, machine parts, semiconductor devices, and the like.

In addition, the air in the plastic bag may be evacuated and vacuumed or filled gas such as nitrogen may be injected prior to heat sealing.

According to such heat sealing, it is possible to achieve the purpose of preventing the corruption of the contents, preventing rust and corrosion, maintaining freshness, reducing volume, preventing flow, and the like.

Plastic bags that can be heat sealed are polyethylene, polypropylene, and the like.

Figures 1a to 1c shows a heat sealing device disclosed in the prior art Patent No. 10-0337110 (wherein Figure 1a is a side sheath, Figure 1b is a front sheath, Figure 1c shows an internal configuration, respectively), Figure 2 FIG. 3 shows a heat sealing apparatus disclosed in another prior art 10-0799924, and FIG. 3 shows a heat sealing apparatus disclosed in another prior art 10-0799926, and FIG. 4 shows another prior art. The heat sealing device disclosed in 10-2009-0124508 is shown.

With reference to the prior arts, a typical configuration of a heat sealing device is that a lower sealing bar 4 supporting an envelope on one side of the base 2 (in accordance with the prior art of FIG. 2) is provided. The upper sealing bar 8 which is fixedly provided and opposing the upper side of the bag while pressing the upper surface of the bag while being operated up and down by an arm 6 is provided to be able to move up and down, and to the side of the upper sealing bar 8. The upper pressing plate 10 is provided together, and the band heater 12 is provided beside the lower sealing bar 4 so as to face the upper pressing plate 10, and is moved back and forth between the upper and lower sealing bars 8 and 4. The nozzle 14 is provided to be able to project in and out.

Here, the arm 6 is provided with a long in each of the front and rear direction, the rear end is hinged to be rotated, the lifting drive unit provided in the base (2) for the lifting operation of the front side in the middle along the front and rear direction Connected with.

The elevating drive unit generates and transmits a driving force for elevating the front end side of the arm 6 on which the upper sealing bar 8 and the upper pressing plate 10 are mounted. According to the prior arts, it is a pneumatic cylinder, an electric motor, a spring. It is implemented by appropriately adopting and combining various driving means, such as a solenoid and an electromagnet.

The upper sealing bar 8 and the upper pressing plate 10 are provided together at the front and rear of the arm 6, which is lifted according to the operation of the elevating drive unit, and the lower sealing bar 4 and the lower sealing bar 4 on the lower base 2 so as to face them. The band heater 12 is provided together back and forth.

In addition, the nozzle 14 is moved back and forth, and is provided so as to be retracted between the upper and lower sealing bars (8, 4), to discharge the air inside the bag to vacuum or inject the filling gas, and to move it in the front and rear direction It is connected to the forward and backward movement drive unit provided in the base (2).

According to the prior arts, the front and rear movement driving unit is implemented by appropriately adopting a driving means such as an electric motor.

In addition, the upper and lower sealing bars 8 and 4 have elastic pads to elastically press and seal the bag.

The operation is performed by the operator so that the nozzle 14 is inserted into the bag in an initial state in which the nozzle 14 is moved forward and protrudes to the front side between the upper and lower sealing bars 8 and 4 which are open to each other. When the envelope opening is laid down between the upper and lower sealing bars 8 and 4, and then operated, the elevating drive unit is activated to lower the upper sealing bar 8 first to lower the upper sealing bar 8 and the lower sealing bar ( 4) sandwiches and seals the envelope opening, and in the sealed state, air inside the envelope is sucked, discharged, or filled gas is injected through the nozzle 14, and then the front and rear movement driving part is maintained in the same state. According to the operation of the nozzle 14 is moved backwards and withdrawn from the bag, and then the lifting drive unit is operated again while the same sealing is maintained to lower the upper sealing bar (8) and the upper pressing plate (10) and eventually Upper press When the 10 and the band and the heat-adhesive envelope opening by compression, a certain time after the upper sealing bar (8) of the heater 12 is raised back to the initial state is recovered out of the envelope it is complete, the operator action.

That is, the upper sealing bar 8 is first lowered from the height position in the open state to the middle height position in the first pinched state, and then secondly lowered from the middle height position in the first pinched state to the height position in the second pinched state. do.

Furthermore, the heat sealing device presses the upper and lower clamping bodies and manually inserts the plastic bag of the target object, so that the pressing is performed with the fingers or other external objects caught by the worker during repeated and continuous work. It is a device that is highly likely to cause a safety accident.

In this regard, a technique capable of blocking a safety accident is disclosed in the prior art according to FIG. 2 described above, which is further shown in FIG.

Referring to the related art, the lifting cylinder 20 implements the two-stage lowering operation of the upper sealing bar 8, and the spring 22 to push down the built-in piston 24 inside the lifting cylinder 20. ) Is provided.

The upper position detection sensor 44, the intermediate position detection sensor 46, and the lower position detection sensor are disposed on the outer circumference of the lifting cylinder 20 corresponding to the top dead center position, the middle position and the bottom dead center position of the piston 24, respectively. 48 is disposed, these sensors are proximity sensors that detect the position of the piston 24 in the proximal position.

Therefore, the operation is performed by the elastic force of the spring 22 in the state in which the primary lowering of the upper sealing bar 8 is released from pneumatic pressure, and when the piston 24 is lowered according to the primary lowering, the corresponding piston 24 ) Is sensed by the intermediate position detection sensor 46, and the second descending is performed according to the operation of the lifting cylinder 20.

According to the technique, the intermediate position detection sensor 46 detects and pauses the primary lowering of the piston 24, thereby providing a free time for the operator to withdraw a finger or an external object to prevent a safety accident.

However, the technique is excellent in that the first descending is performed by using the spring 22, so as to reduce the compressive force during the lowering so that a large accident does not occur, but to ensure complete safety at the following points: There is no number.

In the art, a magnetic proximity sensor is used as the position detection sensor, that is, the position detection sensor detects the magnetic force of the magnet coupled to the piston 24 to detect the height of the piston 24.

However, due to the characteristics of the proximity sensor including the magnet type, the detection range is considerably wide (± 7 mm in height). Therefore, if the setting is incorrect, stability cannot be secured at all.

And, even if initially set correctly, if the initial setting is poor due to vibration or external impact of the machine itself for a long time can not be secured at all.

In addition, when the upper sealing bar 8 is lowered and hit by a finger or other object, the upper sealing bar 8 may be returned upward and immediately opened, and the upper sealing bar may be opened until the middle position detection sensor 46 detects it. As (8) continues to descend, the crimping accident cannot be completely prevented.

In other words, according to the technology, even if an inserted finger or an external object is detected, the countermeasure cannot be immediately taken.

The present invention has been devised to solve the above problems, by quickly and accurately detecting the situation of the operator's finger or other external objects during the lowering operation of the upper sealing bar, as soon as possible to return immediately, more completely safety accidents It is an object of the present invention to provide a heat sealing device having a safe lifting function of a sealing bar that can be prevented.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The heat sealing device having the safety lifting function of the sealing bar of the present invention for achieving the above object, the base is provided with a lower sealing bar and a band heater is mounted on the outer front and rear side as a housing; A pivot support bracket coupled to protrude upward on an upper surface of the rear position of the base and having a sliding hole along the vertical direction; A hinge shaft which is inserted into the sliding hole of the pivot support bracket and provided to be movable upward and downward; An arm provided in the front and rear direction and coupled to the hinge shaft through a rear end side, and an upper sealing bar mounted on the front and rear sides of the front end and hinged to the upper end of the elevating drive bar along the front and rear direction; An elevating drive unit generating a driving force for elevating the front end side of the arm and transmitting the elevating drive unit to the arm through the elevating drive bar; The rear end of the arm or the hinge shaft lowered by the seesaw movement caused by the reaction caused by the reaction of the upper sealing bar to the finger or an external object inserted between the upper and lower sealing bar during the lowering operation of the upper sealing bar. A vertical sliding bar which is pressed by the lowering and is normally shot upward in the upward direction by a spring spring; A sensing switch for detecting a falling of the vertical sliding bar and transmitting a sensing signal; And a control unit configured to control the lifting driving unit so that the upper sealing bar is raised and returned as soon as the sensing signal is received from the sensing switch. It includes.

Preferably, the lifting drive unit, the spring for first lowering the front end side of the arm; And a cylinder for secondarily lowering the front end side of the arm. As shown in FIG.

Also preferably, the pivot support bracket may include: a lower sliding hole formed to communicate with a lower portion of the sliding hole so that the upper end portion of the vertical sliding bar is inserted and guided; It may be provided.

Also preferably, the sensing switch may be a touch switch for sensing by touching a lower end of the vertical sliding bar which is lowered.

According to the present invention, if the user's fingers or other external objects are caught in addition to the plastic bag that is the object of work, it is possible to quickly and accurately cope with the release of the crimp, it is possible to achieve an effect that can completely block the safety accident.

1a to 1c is a view showing a heat sealing device disclosed in the prior art Patent No. 10-0337110,
2 is a view showing a heat sealing device disclosed in another prior art Patent No. 10-0799924,
3 is a view showing a heat sealing device disclosed in another prior art Patent No. 10-0799926,
4 is a view showing a heat sealing device disclosed in another prior art Patent Publication No. 10-2009-0124508,
5 is a view showing a technique adopted for the prevention of safety accidents in the prior art according to FIG.
Figure 6 is a cross-sectional view showing a heat sealing device having a safety lifting function of the sealing bar according to the present invention as a whole,
7 is a cross-sectional view showing a main portion of a heat sealing device having a safe lifting function of a sealing bar according to the present invention;
8 is a view showing the main action of the heat sealing device having a safe lifting function of the sealing bar according to the present invention.

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

6 is a cross-sectional view showing a heat sealing device having a safe lifting function of the sealing bar according to the present invention as a whole, FIG. 7 is a cross-sectional view of the recessed portion, and FIG. 8 is a view showing the recessed action.

According to the present invention, when the lower sealing bar 122 is operated in a lowering operation, when the operator's fingers or other external objects are caught in addition to the extremely thin plastic bags between the upper and lower sealing bars 122 and 112, the upper sealing is quickly and accurately detected. As the descending of the bar 122 is immediately stopped and the return is immediately raised, the technology prevents safety accidents and damage to objects such as injuries. The detailed description of the components that are not directly related to the relevant points is omitted. Reveals.

The heat sealing device 100 has an upper surface corresponding to a somewhat rearward position of the base 110 and the base 110 on which the lower sealing bar 112 and the band heater 114 are mounted front and back on the outer front side of the enclosure. The hinge is provided to be coupled to protrude upward in the rotation support bracket 116 having a sliding hole 116a along the up and down direction, the sliding support 116a of the rotation support bracket 116 is provided to guide freely and move up and down It is provided with a shaft 118, elongated in the front-rear direction and fixedly coupled to the hinge shaft 118 through the rear end side or rotatably coupled to the hinge shaft 118, and the front side and the upper sealing bar 122 and the upper pressing plate (front and rear) 124 is mounted and provided inside the base 110 to elevate the front end of the arm 120 and the arm 120 hinged to the upper end of the elevating drive bar 128 in the middle along the front and rear direction, Generating driving force for The operator's finger inserted between the elevating drive unit 126 which transfers to the arm 120 through the elevating driving bar 128 and the upper and lower sealing bars 122 and 112 during the lowering operation of the upper sealing bar 122 or The upper sealing bar 122 is pressed by the rear end of the arm 120 or the hinge shaft 118 coupled thereto, which is lowered by the seesaw movement caused by the reaction generated when the upper sealing bar 122 comes into contact with the external object. The detection signal from the detection switch 134 and the detection switch 134 for detecting the falling of the vertical sliding bar 130 and the vertical sliding bar 130, which is always shot upward by the 132. It includes a control unit (not shown) for controlling the lifting drive unit 126 so that the upper sealing bar 122 as soon as received receives the return.

Here, the arm 120 is preferably provided in pairs on both the left and right sides on the base 110 so that the left and right upper sealing bar 122 and the upper pressing plate 124 can be stably coupled to lift and operate.

Arms 120 are each lengthened in the front and rear direction, and the rear end side thereof is rotatably coupled to the rotation support bracket 116, and the upper sealing bar 122 and the upper press plate 124 back and forth on the front end side of the free end. ) Is mounted, and hinged to the upper end of the elevating drive bar 128 in the middle along the front-rear direction.

Thus, the arm 120 is supported by the elevating drive bar 128 on the lower side and hinged with the elevating drive bar 128 on the way, so that seesaw movement may be possible.

The rear end of the arm 120 is coupled to the hinge axis 118 in a direction orthogonal to the hinge shaft 118 is inserted and coupled to the sliding hole 116a on the pivot support bracket 116.

The pivot support bracket 116 is coupled to protrude upward with respect to an upper surface corresponding to a somewhat rearward position of the base 110 to pivotally support the rear end side of the arm 120, and to the rear end of the arm 120. It has a sliding hole 116a as a shaft hole for inserting and supporting the coupled hinge shaft 118.

Here, the sliding hole 116a is formed to have a predetermined length up and down to allow the hinge shaft 118 coupled to the rear end side of the arm 120 to be guided up and down.

Meanwhile, the upper sealing bar 122 and the lower sealing bar 112 are elastically pressed to seal the plastic bags, and sponge or elastic rubber or the like so that the nozzle 136 can be drawn out through them while maintaining the sealing. It is implemented as a long length elastic pad.

The elevating drive unit 126 generates a driving force for elevating the front end side of the arm 120 on which the upper sealing bar 122 and the upper pressing plate 124 are mounted. According to the prior arts, it is a pneumatic cylinder, an electric motor, Various driving means, such as a spring, a solenoid, an electromagnet, etc., can be implement | adopted and combined suitably.

Preferably, the lifting drive 126 can be implemented such that the primary lowering is effected by the spring 126a and the secondary lowering is by the cylinder 126b as in the prior art according to FIG. As the lowering is performed by the elastic force of the spring 126a, the compressive force during the first lowering may be appropriately reduced to reduce the degree of compression received even when a worker's finger or an external object is caught.

In this regard, the elevating drive bar 128 is lowered or raised in conjunction with the operation of the elevating drive unit 126, and transmits the elevating drive force to the arm 120.

Preferably, the elevating drive bar 128 has its engagement position with respect to the arm 120 slightly outward from the middle to the front side, so that the rear end side of the arm 120 may be slightly raised even when the arm 120 is seesawed. It may be relatively largely lowered to be accurately sensed by the sensing switch 134.

On the other hand, it is pushed down by the rear end of the arm 120 or the hinge shaft 118 mounted on the rotation support bracket 116 and the seesaw movement is lowered, and is supported by the spring spring 132 in accordance with the end of the seesaw movement The vertical sliding bar 130 is provided to move up and down while being guided.

For this purpose, the lower sliding hole 116b may be formed to communicate with the lower portion of the sliding hole 116a on the rotation support bracket 116 so that the upper end of the vertical sliding bar 130 can be inserted and guided and moved up and down.

The vertical sliding bar 130 is always shot upwards by the spring spring 132 so that the hinge shaft 118 can be rotated in a state where it is located at the highest position of the sliding hole 116a. .

The spring spring 132 is provided to give the vertical sliding bar 130 at all times in the upward direction, as shown by way of example, the upper end is supported on the protruding portion formed on the upper end side of the vertical sliding bar 130 And the lower end thereof may be supported by a separate member (shown in the form of a nut member in the drawing).

The sensing switch 134 detects a vertical sliding bar 130 that is pressed and lowered according to the seesaw motion of the arm 120 and transmits a sensing signal.

Preferably, the sensing switch 134 may be implemented as a touch switch for sensing by touching the lower end of the vertical sliding bar 130, which is lowered, it is mounted to be protected inside the base 110, as shown .

The control unit controls the lifting drive unit 126 to lift and operate the front end side of the arm 120 immediately after receiving the detection signal transmitted from the detection switch 134, and is conventionally mounted in the heat sealing device 100. It can be implemented by modifying the control unit.

In addition, the heat sealing apparatus 100 which concerns on this invention is equipped with the nozzle 136, the front-back movement drive part 138, etc. similarly conventionally.

The preferable effect | action of the heat sealing apparatus 100 which has the safety elevating function of the sealing bar which concerns on this invention which has the above structure is demonstrated below.

In the initial state in which the nozzle 136 protrudes forward through the gap between the upper and lower sealing bars 122 and 112 which are moved forward and open to each other, the operator seals the upper and lower seals so that the nozzle 136 is inserted into the bag. When the envelope opening is laid down between the bars 122 and 112, and then operated, the elevating drive unit 126 is activated to lower the upper sealing bar 122 first to lower the upper sealing bar 122 and the lower sealing bar 112. ) Sandwiches and seals the envelope opening.

Then, the air in the bag is sucked, discharged or filled gas is injected through the nozzle 136 in the sealed state, and then the nozzle 136 according to the operation of the front and rear movement driving unit 138 in the same state in which the sealing is maintained. ) Is moved backwards and withdrawn from the bag, and then the lifting driving unit 126 is operated again while the sealing is maintained in the same manner, thereby lowering the upper sealing bar 122 and the upper pressing plate 10 secondly, and eventually the upper pressing plate 10. ) And the envelope opening are heat-bonded by the compression of the band heater 12, and after a certain period of time, when the upper sealing bar 8 rises and returns to the initial state, the worker takes out the collected envelope and collects it.

In the above operation, when the upper sealing bar 122 is lowered, if the upper and lower sealing bars 122 and 112, in addition to the ultra-thin plastic bag is caught by the operator's fingers or other external objects, the lower upper sealing is lowered The arm 122 hits the finger or an external object, and accordingly instantaneous weak recoil is generated so that the front side of the arm 120 is slightly raised, and thus the arm 120 is allowed to seesaw. The rear end of the lower side is relatively large and is detected by contact with the detection switch 134.

Then, the sensing switch 134 simultaneously transmits a sensing signal to the control unit, and the control unit immediately operates the lifting driving unit 126 to reversely return the upper sealing bar 122 to prevent a crimping accident from occurring.

Thereby, according to this invention, a crimping accident can be prevented completely.

In the foregoing description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as merely illustrative of a preferred embodiment of the present invention.

100: heat sealing device 110: expectation
112: lower sealing bar 114: band heater
116: rotation support bracket 116a: sliding hole
116b: lower sliding hole 118: hinge axis
120: arm 122: upper sealing bar
124: upper pressing plate 126: elevating drive unit
126a: spring 126b: cylinder
128: lift drive bar 130: vertical sliding bar
132: spring spring 134: detection switch
136: nozzle 138: forward and backward drive

Claims (4)

A base in which the lower sealing bar and the band heater are mounted back and forth on the outer shear side as a housing;
A pivot support bracket coupled to protrude upward on an upper surface of the rear position of the base and having a sliding hole along the vertical direction;
A hinge shaft which is inserted into the sliding hole of the pivot support bracket and provided to be movable upward and downward;
An arm provided in the front and rear direction and coupled to the hinge shaft through a rear end side, and an upper sealing bar mounted on the front and rear sides of the front end and hinged to the upper end of the elevating drive bar along the front and rear direction;
An elevating drive unit generating a driving force for elevating the front end side of the arm and transmitting the elevating drive unit to the arm through the elevating drive bar;
The rear end of the arm or the hinge shaft lowered by the seesaw movement caused by the reaction caused by the reaction of the upper sealing bar to the finger or an external object inserted between the upper and lower sealing bar during the lowering operation of the upper sealing bar. A vertical sliding bar which is pressed by the lowering and is normally shot upward in the upward direction by a spring spring;
A sensing switch for detecting a falling of the vertical sliding bar and transmitting a sensing signal; And
A controller configured to control the lift driver so that the upper sealing bar rises and returns immediately after receiving a detection signal from the detection switch; Heat sealing device having a safety lifting function of the sealing bar comprising a. The method of claim 1,
The lifting drive unit,
A spring that first lowers the front end of the arm; And
A cylinder for secondarily lowering the front end side of the arm; Heat sealing device having a safe lifting function of the sealing bar comprising a. The method according to claim 1 or 2,
The pivot support bracket,
A lower sliding hole formed to communicate with a lower portion of the sliding hole such that an upper end of the vertical sliding bar is inserted and guided and moved up and down; Heat sealing device having a safe lifting function of the sealing bar comprising a. The method according to claim 1 or 2,
The detection switch,
Heat sealing device having a safety lifting function of the sealing bar, characterized in that the contact switch for touching and sensing the lower end of the vertical sliding bar is lowered.

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