JPH03240625A - Sealing machine for air charging - Google Patents

Abstract

PURPOSE:To easily and quickly perform air charging into a bag made of thermoplastic resin and sealing of the bag by a method wherein the descending stroke of contact-bonding lever is divided into two steps, the first step in which an air nozzle is inserted into the opening of the bag and a presser member is pressed on a receptacle member, and the second step in which the sealing member and the receptacle member are clamped and brought in close contact with each other. CONSTITUTION:When a pedal 8 is treaded down to start an air charge step, a contact-bonding lever 4 descends, an air nozzle 11 is moved backward up to a position where a presser member 13 and a presser receptacle member 18 are located, and pressed there together with an opening 63 of a bag 62. The air nozzle 11 is inserted into the bag 62 and air is charged into the bag 62. When the bag 62 is fully filled with air, the pedal 8 is treaded further to start sealing step, and the contact-bonding lever 4 is lowered further. As a sealing member 12 is pressed down further, the opening 63 of the bag 62 is pressed more strongly between a sealing receptacle member 16 and the sealing member 12. A heater 17 is energized just before the treading stroke of pedal 8 is completed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air-filling sealing machine, which fills air into a bag made of, for example, thermoplastic plastic with a packaged item stored therein, and also seals the bag. It is used when heat sealing an opening.

(Prior art) In the field of packaging, when packaging items that easily lose their shape, such as a bouquet of flowers, it is considered effective to fill the bag with air to provide a cushioning effect. .

However, according to conventional packaging technology, filling of air and sealing the bag must be performed separately, so air leaks out before sealing is completed, making it impossible to seal the bag in a completely filled state. There's a problem.

Therefore, the technical object of the present invention is to provide a sealing machine that can perform sealing at the same time as air filling.

(Means for solving !i!!) In order to solve the above problems, this invention provides a seal receiving member on the front edge of the main body case, and a pressure receiving member along the inside of the seal receiving member. A sealing member and a pressing member are provided on the front edge of a crimping lever which is provided on the main body case so as to be movable up and down, and which are opposed to the seal receiving member and the pressure receiving member, respectively, and the pressing member is moved vertically with respect to the sealing member. It is supported by the crimping lever so as to be able to move relative to each other, and an air nozzle that protrudes and retracts outward from the main body case side is provided between the above-mentioned pressure receiving member and the pressing member, and the amount of powder between the pressing member and the pressure receiving portion is controlled when the crimping lever is raised. An air filling step in which the interval is set smaller than the interval between the sealing member and the seal receiving member, and the downward stroke of the crimping lever causes the pressing member and the pressing member to be pressed against each other with the air nozzle inserted into the opening of the bag. The sealing process is divided into two stages: and a sealing process in which the sealing member and the seal receiving member are sandwiched between the bag and brought into close contact with each other.

[Effect]

With the pressure member and the seal member separated above the pressure receiving member and the seal receiving member facing each other by raising the crimping lever, the opening of the bag made of thermoplastic sort is inserted between these members, The air nozzle is inserted into the opening of the bag, and then in the air filling process by the downward stroke of the crimping lever, the opening of the bag is first pressed by the pressing member and the pressure receiving member, and at the same time air is filled into the bag from the air nozzle. .

When the air filling is completed, the downward stroke of the crimping lever is advanced to the second stage to proceed to the sealing step, the sealing member is brought into close contact with the seal receiving member, and the bag opening is heat-sealed.

〔Example〕

As shown in FIG. 1, in this sealing machine, a support 2 is erected on a mousse 1, and a main body case 3 is attached to the upper end of the support 2. A crimp leno\-4 is swingably attached to the main body case 3. The crimp lever 4 is connected to the mouth/throat 7 via a vertical link 5 and a horizontal link 6. A rod 7 is provided along the column 2 and its lower end is connected to a pedal 8 attached to the heath 1. By stepping on this pedal 8, the crimp lever 4 is pushed down.

In addition, in the figure, 9 is a blower, 10 is a table, 11 is an air nozzle, 12 is a sealing member, 13 is a pressing member, 16
is a seal receiving member.

FIGS. 2 and 3 show the above details.

As shown in FIG. 2, a pair of crimp levers 4 are attached to both rear ends of the main body case 3 by pins 4'. A sealing member 12 along the front edge of the main body case 3 is provided between the tips of the pair of crimp levers 4 . Also, the seal member 1
A pressing member 13 is provided along the inside of 2. Silicone rubber 14 is adhered to the lower surface of the seal member 12.

Further, the pressing member 13 is made of rubber, and is attached to the back surface of the sealing member 12 via a coil spring 15 so as to be able to move up and down slightly. The lower end surface of the pressing member 13 protrudes slightly downward from the surface of the silicone rubber 14 described above.

The front edge of the main body case 3 is also provided with the above-mentioned seal receiving member 1.
6 is attached, and a heater 17 is attached to its upper end surface. Further, along the inside of the seal receiving member 16, a rubber pressure receiving member 18 facing the aforementioned pressing member 13 is provided. The height of the upper end surface of the pressure receiving member 18 is slightly higher than that of the upper end surface of the seal receiving member 16. Therefore, when the crimp lever 4 is in the raised and stationary state, the distance between the pressing member 13 and the pressure receiving member 18 is smaller than that of the seal member 16. 12 and the seal receiving member 16 (FIG. 9).

The heater 17 connects the heating element 19 with a heat-resistant resin tape 20 (
For example, it is covered by the trade name "Teflon").

Arc-shaped recesses 21 and 22 are provided in the central portions of the pressing member 13 and the pressing member 18 facing thereto. The tip part is clamped.

The air nozzle 11 is attached to the center portion of the nozzle lever 23 on the upper surface of the main body case 3, as shown in FIG. The nozzle lever 23 can take two positions: a backward position and a forward position shown by a - dotted chain line, and the coil spring 2
4 in the direction of the retracted position.

The nozzle lever 23 is connected to a guide 25 as shown in FIG.
The tip of the nozzle lever 23 is placed on the upper surface of the locking piece 28 on the locking member 27. The locking member 27 is biased upward, and when the nozzle lever 23 is moved to the forward position (FIG. 5 - dashed line), it comes off from the locking piece 28 and engages the nozzle lever 23 with the side surface of the locking piece 28. and lock it in the forward position.

The lock member 27 has a cam plate 2 rising from one end thereof.
9 is provided. The cam plate 29 is connected to the seal member 12 described above.
(FIG. 3), the cam 31 hits the cam plate 29 while the seal member 12 is lowering.

This pushes down the locking member 27, so that the nozzle lever 23 is pulled back by the coil spring 24 and rests on the locking piece 28 again.

When the nozzle lever 23 is in the forward position, the air nozzle 11 projects further forward than the seal member 12 and the seal receiving member 16, as shown in FIG.

In addition, in the retracted position, as shown in FIG. 11, the press member 13 and the press receiving member 18 are retracted to opposing surfaces. The air nozzle 11 is connected to the blower 9 via a hose 32 (Fig. 4).
connected to.

On the other hand, the lower ends of two large coil springs 33 are attached to the upper end surface of the horizontal link 6, which is integrally connected to the crimp lever 4 via the vertical link 5, as shown in FIG. It is attached to the main body case 3. This exerts an upward biasing force on the crimp lever 4, the vertical link 5, the horizontal link 6, and the rod 7.

The rod 7 mentioned above passes through the interior of the gripper 34. The gripper 34 is supported by a bracket 35 fixed to the support column 2, and has a function of allowing the pedal 8 to be depressed in two steps.

That is, as shown in FIGS. 6 to 8, the gripper 34
A radially open gap 37 is formed along the through hole 36, and a cam 39 is attached to a pin 38 provided between the gap 37.
is attached rotatably, and the lower end of the cam 39 is pulled downward by a coil spring 40.

The reference posture of the cam 39 is a posture in which it is not in contact with the rod 7, as shown in FIG. 6 or FIG. A protrusion 41 is formed on the cam 39 at a position higher than the pin 38 in its standard attitude. Further, when the rod 7 is at the highest position, an arcuate recess 42 is provided in the portion of the rod 7 facing the protrusion 41, and the tip of the protrusion 41 faces the recess 42. Furthermore, two steps 43 and 44 are formed on the outer peripheral surface of the rod 7 at the upper part of the recess 42. - pin 38 of step part 43 of step
The horizontal distance from the protrusion 41 is slightly smaller than the radius of rotation of the tip of the protrusion 41. Further, the distance of the second step portion 44 from the pin 38 is sufficiently larger than the radius of rotation of the tip of the projection 41.

Therefore, when the pedal 8 is depressed one step from the state shown in FIG. 6 and the air filling process is started by the downward stroke of the crimp lever 4, the rod 7 is lowered and the tip of the protrusion 41 of the cam 39 is brought to the upper end of the recess 42. The cam 39 rotates so that the protrusion 41 faces diagonally downward, and the tip of the protrusion 41 reaches the first step 4.
3 (Figure 7). At this time, the position of the tip of the protrusion 41 is lower than the position of the pin 38. In this state, the pressing member 13 and the pressing member 18 are pressed against each other.

When the foot is removed from the pedal 8, the rod 7 tries to rise due to the force of the coil spring 33, but the protrusion 41
The rod 7 is held firmly in this position.

After the air filling is completed, the pedal 8 is further depressed and the sealing process is started by the second stroke of the crimp lever 4, the rod 7 is lowered and the protrusion 41 of the cam 39 enters the second step 44 into the 0 step. Since the portion 44 is sufficiently deeper than the rotation radius of the protrusion 41, the cam 39 freely rotates and returns to its original standard position by the force of the coil spring 40. When the foot is removed from the pedal 8 in this state, the rod 7 is pulled up by the force of the coil spring 24 and returns to its original state.

Further, as shown in FIG. 3, the upper end of the rod 7 passes through the horizontal link 6, and connects the upper end to an upper end Fi 45 supported by the horizontal link 6 so as to be movable up and down. i
A rubber cylinder 46 with strong elasticity is interposed around the rod 7 between the i 45 and the horizontal link 6. When the pedal 8 is depressed normally, the rubber tube 46 is not deformed, and the rod 7 is rigidly connected to the horizontal link 6.

However, when the pressing force of the pedal 8 becomes greater than a certain level, the rubber cylinder 46 is compressed, which reduces the pressing force between the seal member 12 and the seal receiving member 16, but at the same time gives the operator a strong sense of resistance through the pedal 8. to detect the start of sealing.

A microswitch 47 is attached to the horizontal link 6 behind the rubber cylinder 46 (FIG. 2), and a switch operating projection 48 provided on the lower surface of the upper end plate 45 is exposed above the microswitch 47. Therefore, when the rubber cylinder 46 is compressed in the sealing process, the protrusion 48 operates the microswitch 47 to perform an electrical action as described below.

Further, a limiter 49 is provided on one side of the rubber tube 46. That is, the mink-49, which is swingably attached downward to the upper end plate 45, faces the protrusion 50 on the horizontal link 6 with a small gap therebetween.

The limiter 49 is connected to the armature 53 of the solenoid 52 via a link 51, and even if the pedal 8 is strongly depressed when the solenoid 52 is not energized, the limiter 49 collides with the protrusion 50 to limit the lowering of the door. death,
This prevents the seal member 12 and seal receiving member 16 from being strongly pressed against each other.

This prevents sealing even if the pedal 8 is strongly depressed before air is supplied.

FIG. 15 shows a timer control circuit, 56 is a timer unit, 5? is a power transformer, 19 is a heating element of heater 17, 47 is the above-mentioned microsinch, 9 is a blower,
52 is a solenoid, 58 is a relay, 59 is an air supply switch, and 61 is a contact point of the relay 58. Timer unit 5
6 is provided with a timing adjustment dial 60.

When the air supply switch 59 is operated, the blower 9 is driven, and the solenoid 52 and relay 58 are energized.

When the microswitch 47 is activated, the blower 9 is stopped, and the excitation of the solenoid 52 and relay 58 is stopped. In addition, the heating element 19 is energized by the operation of the microsinch 47, and the timer unit 56 is turned on.
When a predetermined time has elapsed, the timer unit 56 is turned off and power supply is stopped.

The sealing machine of the embodiment has the tank bottom as described above, and its operation will be explained next.

As shown in FIG. 2, with the crimp lever 4 raised,
When the nozzle lever 23 is pulled forward and locked in the forward position, the air nozzle 11 protrudes in front of the seal member 12 and seal receiving member 16 (FIG. 9). In this state, bag 6
Pass the air nozzle 11 through the second opening 63 (first
3), the opening 63 of the bag 62 is positioned between the pressing member 13 and the pressing member 18.

Next, when the pedal 8 is depressed to enter the air filling process, the crimp lever 4 descends and the nozzle lever 23 retreats. As the nozzle lever 23 retreats, the air nozzle 11 retreats to the position of the pressing member 13 and the pressure receiving member 18, and at that position, the nozzle 11 along with the opening 63 of the bag 62
is pressed (Fig. 10). The rod 7 is held in that position because the protrusion 41 of the cam 39 fits into the first step 43 (FIG. 7).

Next, when the air supply switch 59 is operated, the blower 9 is driven and air is supplied into the bag 61 through the nozzle 11, and the bag 62 is gradually filled (see FIGS. 11 and 14).
figure). Also, the solenoid 52 operates and the limiter 49
rotate upward to release the restriction on the downward stroke.

When the air is filled, the pedal 8 is further depressed to proceed to the sealing process. In the sealing process, the crimp lever 4 is further lowered, but the pressing member 13 does not press any further because the coil spring 15 contracts (FIG. 12). In contrast, the sealing member 12 is further pushed down, so that the bag 62
The opening 63 is strongly pressed between the seal receiving member 16 and the sealing member 12.

Just before the completion of the depression stroke of the pedal 8, the rubber cylinder 46 is compressed and the microswitch 47 is activated. This energizes the heating element 19 of the heater 17 and starts the timer unit 56. Also blower 9
will be stopped.

When the predetermined set time of the timer unit 56 is reached, the heating element 19 is de-energized and a cooling period begins. When you take your foot off the pedal 8 after an appropriate cooling period, the pedal 8 returns to its original position due to the rise of the rod 7, and at the same time, the crimp lever 4 also returns to its original state, so that the seal member 12 and seal receiving member 16 are The restriction of the opening 63 of the bag 62 is released.

[Effects of the Invention] As described above, the present invention can realize filling of air and heat sealing after filling by two-step operation of the pedal without moving the bag. Filling and bag sealing can be done quickly and easily.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the embodiment, Fig. 2 is a partially omitted vertical sectional side view of the same, Fig. 3 is a vertical sectional front view showing a part of the same, Fig. 4 is a plan view of the main body case portion of the above, Fig. 5 is a perspective view showing a part of Fig. 4, Figs. 6 to 8 are sectional views showing the action of the gripper, and Figs. 9 to 12 are sectional views showing the action of the pressing part and the sealing part. 13 and 14 are perspective views showing examples of usage conditions, and FIG. 15 is an electric circuit diagram. 1... Heath, 2... Pillar, 3... Body case, 4... Crimp lever 4'... Pin, 5... ...
・Vertical link, 6...Horizontal link, ?・・・
...Rod, 8...Pedal, 9
...Blower 10...Table,
11... Air nozzle, 12... Sealing member, 13... Pressing member, 14...
... Silicone rubber, 15 ... Coil spring, 16
... Seal receiving member, 17 ... Heater,
18... Pressure receiving member, 19... Heating element, 20... Tape, 21.22
...Recess, 23...Nozzle lever, 2
4... Coil spring, 25... Guide,
26...Slide hole, 27...
・Lock member, 28... Locking piece, 29...
...Cam plate, 31...Lock release cam, 32...Hose, 33...
・Coil spring, 34...Gripper-35...
...Fracket, 36...Through hole,
37...Gap, 38...Pin,
39...Cam, 40...Coil spring, 41...Protrusion, 42...Recess, 43.44...Step, 45・・・・・・
...Top end plate, 46...Rubber tube, 47...
...Micro switch, 48...Protrusion, 49...Limiter-50...Protrusion, 51...
...Link, 52...Solenoid, 53.
...Amateur, 56...Timer unit, 57...Power transformer, 58...Relay 59...Air supply switch, 60... ...Dial, 61...Contact, 62...
...Bag, 63...Opening. Figure 1 Figure 9 Figure 16 Figure 11 Figure 10 Figure 12 Figure 13 Figure 14 Figure 15 Figure 9

Claims (1)

[Claims] (1) A seal receiving member is provided on the front edge of the main body case, and a pressure receiving member is provided along the inside of the seal receiving member,
At the front edge of the crimp lever, which is movable up and down on the main body case,
A sealing member and a pressing member are provided opposite to the seal receiving member and the pressure receiving member, respectively, and the pressing member is supported by a crimping lever so that it can move vertically relative to the sealing member, and the pressing member and the pressing member are An air nozzle that protrudes and retracts outward from the main body case side is provided between the members, and the distance between the pressing member and the pressure receiving member when the crimp lever is raised is set to be smaller than the distance between the sealing member and the seal receiving member. The downward stroke is divided into two steps: an air filling process in which the pressing member and the pressure receiving member are pressed against each other with the air nozzle inserted into the opening of the bag, and a sealing process in which the sealing member and the seal receiving member are brought into close contact with each other by sandwiching the bag. An air filling sealing machine characterized by being divided into stages.