JPS6111316A - Band melter in packaging machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a packing machine that uses a heat-melting plastic band made of polypropylene or the like to band and pack an object, and the present invention provides a packing machine that uses a heat-melting plastic band such as polypropylene to band and pack an object. This invention relates to an apparatus for melting the polymerized surface of.

As shown in Fig. 4, the device of the second type has a heating plate 10 attached to the upper end of a vibrating rod 30 which has a shaft 36 supported in the packaging machine body, and a shaft 32 mounted above the shaft 36 of the vibrating rod 30. Trochanter 31
The heating plate that is attached to the upper end of the vibrating rod 30 has conventionally been used as a heating plate, for example, as shown in FIG. The nichrome wire 13 is wound around the surface of the nichrome wire 13, which is sandwiched between a pair of mica plates 12 and 12, and this is sandwiched between bent stainless steel plates 14.
or, as shown in FIG. 7, two elongated nichrome plates 13a, 13a are arranged in parallel on the surface of a rectangular flat mica core 11. Then, the tips of the nichrome plates 13'a, 13a are folded back and placed on the back side of the mica core 11, and both tips are connected by the nichrome plate 13b, which is then held between a pair of mica plates 12 and 12. Bent stainless steel plate 14
The base ends of the nichrome plates 13a, 13a are connected to the current-carrying lead wire 15 while being held between the nichrome plates 13a, 13a.

Then, as shown in FIGS. 4 and 5, from the state in which the main roller 53 and the upper roller 54 supply the band B to the outside of the packaging machine body or into the arch on the body,
When the start button is turned on, the camshaft 60 starts rotating, the right press 40 rises to grip the front end of the band B, the two rollers pull back the band B, and the unillustrated band tightening mechanism tightens the supply end of the band B. , and gripping the supply end side of the band B by raising the left press 49, the rotor 31 of the vibrating rod 30 rotating along the surface of the cam 61 descends from the mountain of the cam 61, and the vibrating rod 30 is biased by the spring and vibrates in the direction of each of the press members. Then, the heating plate 1 attached to the upper end of the vibrating rod 30
0 is inserted between the tip side and the supply end side of the band B in the superposed state, the middle press 45 rises, and the middle press 4
5. The lower blade 46 formed on the upper edge of the right press 40 and the upper blade 42 formed on the upper edge of the outlet of the insertion hole 41 bored at the upper end of the right press 40 contact to cut the supply end side of the band B, and the middle press 40 cuts the supply end side of the band B. The overlapping surface of band B is melted by strongly pressing the top of the heating plate 10 inserted between the overlapping surface of band B and the overlapping surface of band B against the upper slide table 33. Thereafter, the middle press 45 is lowered, and when the rotor 31 of the vibrating rod 30 rises up the mountain of the cam 61, the heating plate 10 is moved away from between the overlapping surfaces of the band B by the vibration of the vibrating rod 30, and then the middle press 45 rises again. Then, the melted surface of the overlapping portion of band B is pressed against the slide table 33 and bonded.

Thereafter, each press member descends and returns to its original position, and the slide table 33 is removed from between the article to be packed and the band B by the rotation of the camshaft 60. And camshaft 6
0, the slide I and the table 33 advance above each press member, and the main roller 53 and upper roller 54 feed the bread I'B to the outside of the packaging machine body or into the arch on the body, and one step of packaging is completed. ends.

The above-mentioned packing process, that is, the 360° rotation of the camshaft 60 for the band supply ratio from the raising of the right press 40 requires about 3 seconds.

However, the conventionally used heating plate is
In the case shown in the figure, in addition to the thickness of the mica core 11, the pair of mica plates 12 and 12, the bent Stella 1, and the base plate 14, the thickness of the mica core 11 is ], and the one shown in FIG. 7 has a mica core 11, a pair of mica plates 12 and 12, and a bent stainless steel plate. In addition to the thickness of the mica core 11, it has the thickness of two nichrome plates 13a and 13a folded back from the front surface to the back surface, so both of them are thick as a whole. Therefore, in the above-mentioned packaging process, if the distance between the overlapping surfaces of the overlapping bands is relatively small, for example when the width of the slide table is made small, the heating plate may not be inserted properly between the overlapping surfaces. There is a problem in that the band collides with the side edge of the band, making it impossible to melt the band and resulting in poor welding.

In particular, in conventional models that use thick heating plates as mentioned above, sufficient space must be maintained between the bonding surfaces of the bands during polymerization, so the movement width of each press member is inevitably limited. The movement distance is greatly increased, and the movement width of each of the press members cannot be reduced, making it difficult to shorten the packaging time and unable to meet the demand for high-speed packaging, where one process is desired to be within 1.5 seconds. It was something.

In addition, because all conventional heating plates have a large number of components, the surface of the heating plate is suitable for band melting (7t:
It takes time to reach a predetermined humidity level and is not suitable for high-speed packaging due to poor thermal efficiency.

According to the first test conducted by the inventor of the present invention, (1) Band material: Polypropylene (2) Band 1tlIi
i15.5mm (3) Indoor temperature 20℃ (4) Band surface temperature 16℃ (5) - Packing process time 1.5 seconds (a) Band feeding 0.3 seconds (b) Band pulling back
0.2 seconds (c) Band tightening and welding 1.0 seconds (of which, pressure time between the band polymerization surface and the heating plate is 0.03 seconds) (6) The heating plate according to the present invention is used as the heating plate. Above (1)~
When the breaking strength of the band welded area was measured under the conditions of (6), as shown in Table <1> below, welding of the band overlapping surface was possible and the band overlapping area was not excessively melted. The limit welding temperature at which no bonding occurs is 320°C to 425°C.
The highest NI breaking strength of the band welded part within the allowable welding temperature range of B was 134 kg. and,
Among the above allowable welding temperature ranges, the most suitable welding temperature for strong band welding is 330°C to 400°C;
It showed the highest breaking strength of 134 kg at around 5°C.

However, in conventional band welding, a heating plate is always heated with a constant voltage and current, so in high-speed packaging where one process requires less than 15 seconds, many packages are repeated in a short period of time. Therefore, the heat of the heating plate that comes into contact with the overlapping surface of the band is taken away from the band, resulting in a drop in the surface temperature of the heating plate, and there is a problem in that the band surface cannot be sufficiently melted and strong adhesion cannot be achieved. .

That is, according to the second test conducted by the inventor using the conventional band melting means, (■) the same conditions as the first test conditions (1) to (6);
II) Set temperature of heating plate 425℃ (6.5VX9.0A
) (Maximum allowable temperature for welding) (III) Number of packings: The temperature of the heating plate was measured according to the number of packings under the conditions of (I) to (I) 50 times or more, and the results were as shown in Table 2 below. As shown in Figure 2, the temperature of the heating plate decreased significantly as the number of packings increased, and a temperature drop of 100° C. or more was observed after 50 packings. In particular, considering that the temperature had already dropped to 312°C at the end of the 30th welding process, which is lower than the minimum allowable welding temperature of 320°C, conventional band melting means could
It is almost impossible to perform high-speed continuous packing (1.5 seconds per time) exceeding 0 times, and even if it were possible, it would not be possible to obtain strong band welding.

Table <1> Table <2> The present invention was developed to eliminate the drawbacks of the prior art described above, and its purpose is to configure a heating plate without reducing the strength of the heating plate. By reducing the number of parts, the entire heating plate is made thin, increasing the thermal efficiency of the heating plate, and making it possible to raise the temperature of the heating plate in a short time. The heating plate can be easily inserted between the overlapping surfaces of the side and the supply end side, and the heating plate can be inserted between the overlapping surfaces of the bands with extremely small intervals, minimizing the movement width of each press member to the cam. improves tracking of
In addition to enabling high-speed packaging, it also prevents the temperature of the heating plate from decreasing even during high-speed continuous packaging, and prevents overheating of the heating plate even during normal packaging and high-speed packaging, so that the surface temperature of the heating plate is always maintained at the band. To provide a band melting device that can reliably maintain a proper welding temperature.

The present invention provides a packaging machine equipped with a band melting means that has a heating plate that can freely move forward and backward between the overlapping surfaces of the tip side and the supply end side of a band made of a heat-melting material stretched over an object to be packaged. , the heating plate includes a thin plate-shaped electric heating resistor whose both ends are respectively connected to a current-carrying lead wire, an insulating plate which sandwiches the electric heating resistor in a covering manner, and a covering which clamps and fixes the insulating plate in a covering manner. a first connection circuit that is made of a metal body and supplies constant power to the heating plate to heat the heating plate to within a band welding appropriate temperature range; It is characterized in that it is connected to a second connection circuit that supplies a constant power higher than the constant power, and the two connection circuits are switched by a switch means.

Therefore, the heater can be accurately inserted between the overlapping surfaces of the bands, the moving distance of each member is shortened, and extremely high-speed driving is realized. is always maintained at the appropriate temperature for band welding.

Hereinafter, details of the present invention will be explained based on drawings showing embodiments.

In FIG. 1, the lower end of the vibrating rod 30 is attached to the shaft 36.
A shaft is supported on the main body of the curved casing, and a trochanter 31 is mounted on one side of this shaft support with a shaft 32. And vibrating rod 30
The cam 61 rotates the trochanter 31 on the camshaft 60'' by urging it counterclockwise in the figure by a spring (not shown).
Press against the circumferential surface of the Further, an L-shaped bracket (27) is fixed to the upper end of the vibrating rod 30 with screws, and a heating plate 20 (to be described later) is held on this bracket 27 by a pair of holding plates 25 and 26 having a rectangular flat plate shape. and fix it. That is, the heating plate 20 and the clamping plate 25 that clamps the heating plate 20.
2G, and a female thread passing through the upper surface of the bracket 27. Screw the screws 28 and 28 onto the female threads of the bracket 27.

As shown in FIGS. 2(A) and 2(B), the heating plate 20 is formed by folding a thin plate-shaped electric heating resistor, for example, a nichrome wire stretched into a flat plate shape, to form a vertically long approximately M-shape. Or a nichrome plate 22 formed by punching and molding into a substantially M shape,
A pair of mica plates 21.21 are insulating plates that sandwich this nichrome plate 22 from both sides, and a flat stainless steel body is a metal body that holds and secures the nichrome plate 22 and mica plate 21.21 inside in a covered manner. The tube 23 is configured. Then, net-like lead wires 24 for conducting electricity are placed on both ends of the approximately M-shaped nichrome plate 22 located on the right side in FIG. The mica plates 21 and 21 are both rectangular flat plates, the width of which is approximately equal to the width of the inner wall of the flat stainless steel tube 23, and the length of which is approximately equal to the flat stainless steel tube 23. In the illustrated embodiment, the flat stainless steel tube 23 is formed by crushing a cylindrical stainless steel tube having approximately the same thickness as the conventional stainless steel plate 14 into an elliptical shape, and forming a mica plate 21 with a nichrome plate inside.
21 is stored and crushed into a flat shape. The rear end side of the heating plate 20 constructed as described above is held between a pair of holding plates 25 and 26 as described above, and fixed to the bracket 27 with screws.

The nichrome plate 22 is connected to a power source and is constantly energized by turning on the main switch of the packaging machine. Figure 2 (C) shows an example of the sequence, when the packing machine is stopped, that is, the main switch is turned on, and the band is fed to the outside of the main body or to the arch on the main body, and then the start button is turned on. A voltage of 3.2VX8. O
By supplying a constant power of A, the surface temperature of the heating plate 200 is approximately 39
Heating to the appropriate band welding temperature of 0℃, when operating the packaging machine,
In other words, during the process of driving the packaging machine after the start button is turned on, from tightening the band to welding to supplying the band outside the packaging machine body or into the arch on the body, relay H2 of the second connection circuit is activated. By supplying power of 4.0V Set to maintain within the allowable temperature range. Note that x7 in the figure is a relay that generates the band supply end signal, that is, one packaging process end signal, and the b contact X7b of this relay x7 is connected to the circuit between the start button PB and the relay x1 that becomes conductive when the start button PB is turned on. is interposed, and the relay H2 is connected to the power supply via the a contact Xla of the relay x1, so that the relay H1 and the relay H2
It is connected to the power supply via the b contact H2'b.

33 is a slide table, O's slide table 33
Place the countersunk screws 35.35.35.3 on the frame 34.34.
5, and the lower ends of the frames 34 and 34 are rotatably supported on a shaft 36 in the same manner as the vibrating rod 30, and are made to be able to vibrate at a constant stroke by means of a cam (not shown).

In FIGS. 1 and 3, below the slide table 33, press members such as a right press 40, a middle press 1 nozzle 45, and a left press 49, which can be raised and lowered, are arranged in parallel. right press 40
The whole has a substantially rectangular prism shape, and an arm 44 is provided protruding from the back surface (left side in FIG. 1), and the tip of the arm 44 is supported on a shaft 52. In addition, a press part 40' is attached to the upper end of the right press 40, and an insertion hole 4'' consisting of a band B passage allowance gap is bored in the upper part of this press part 40', and the upper edge of the exit of the insertion hole 41 is An upper blade 42 is formed. A trochanter 43 is provided at the lower end of the right press 40, and the second trochanter 43 is pressed against a cam 62 rotating on a camshaft 60.

Like the right press 40, the middle press 45 has an approximately rectangular prism shape as a whole, and has an arm 48 projecting from the back (left side in FIG. 1), and the tip of the arm 48 is supported on a shaft 52. Medium bracelet 45
A press part 45' is attached to the upper end of the press part 45'.
A lower blade 46 that can freely approach and separate from the upper blade 42 is formed on the upper edge of the blade 5'. A rotor 47 is provided at the lower end of the middle press 45, and the rotor 47 is pressed against a cam 63 rotating on a camshaft 60.

Further, the time for the middle press 45 to be raised by the cam 63 and press the overlapping surface of the band B and the king of the heating plates 20 inserted between the overlapping surfaces is set to be about 0.03 seconds.

The left press 49 has a rectangular prism shape as a whole, and has an arm 51 protruding from the back (left side in FIG. 1), and the tip of the arm 51 is supported on a shaft 52 like the arms 44 and 48 described above. left press 4
A press part 49' is attached to the upper end of 9, and a trochanter 50 is provided to the lower end of 9, and the trochanter 50 of 9 is pressed against a cam 64 rotating on a camshaft 60.

In FIG. 3, 53 is a main roller for supplying and pulling back the band B, and 54 is an upper roller provided so as to be able to press against the main roller 53 via the band. Further, 55 is a gutter-like band introduction path, one end of which is bored in the upper part of the press part 4.0' of the right press 40.
], and the other end faces a band tightening mechanism (not shown).

Next, the operation will be described. 4〇 In FIGS. 1 and 3, the rotation of the main roller 53 and the upper roller 54 causes the punt introduction path 55 to
and passes through the insertion hole 41 drilled in the upper part of the press part 0' of the right press 40 (7) The tip of the band B supplied outside the packing machine main body or into the main body-hill arch passes through the slide table 33
It has reached the lower part of .

At this time, since the main switch (not shown) is turned on, the nichrome plate 22 is connected to the first transformer through the first connection circuit by the signal from the relay H1 which is turned on via the b contact H2b of the relay H2. .2VX8. It is applied with OA, and the surface temperature of the heating plate 20 is heated to about 390°C. Furthermore, since the nichrome plate 22 has a substantially M-shape folded back at its tip, the surface temperature of the portion of the heating plate 20 that contacts the band overlapping surface is uniformly about 390°C.

Then, when the start button PB is turned ON, the camshaft 60 rotates, and the trochanter 43 provided at the lower end of the right press 40 moves onto the camshaft 60.
The right press 40 rises and the press part 40' at the upper end of the right press 40 rises.
grips and fixes the distal end side of the band B between it and the lower surface of the slide table 33. At the same time as the start button PBON is turned on, relay H2 is turned on by relay x1 via a contact Xla,
A voltage of 4.0V x 11A is applied to the nichrome plate 22 from the second transformer via the second connection circuit, and the surface temperature of the heating plate 20 reaches within the permissible temperature range for band welding, which is higher than 390°C (during idle operation). ).

Immediately after gripping the tip of the band, the main roller 53 and the upper roller 54 reverse rotation, and the band B is pulled back and wrapped around the object to be packed. When the supply end side of the band B is further tightened by a band tightening mechanism (not shown), the left press 4
The rotor 50 provided at the lower end of the slide table 33 moves up the mountain of the cam 64 that rotates together with the camshaft 60, causing the left press 49 to rise and the press part 49' at the upper end of the left press 49 to move between the lower surface of the slide table 33 and the lower surface of the slide table 33. Grip and fix the supply end side of band B.

Next, pulling back the band B by the main roller 53 and the upper roller 54 and tightening the band B by the band tightening mechanism are completed, and the shaft 32 is attached to the side of the vibrating rod 30.
A cam 61 in which the attached trochanter 31 rotates together with the camshaft 60
As a result, the vibrating rod 30 is biased by a spring (not shown) and vibrates in the counterclockwise direction in FIG. 1 around the bearing part of the shaft 36. At the time of B, the band B is in an overlapping state with a slight gap between its tip side and the supply end side, and as is clear from Fig. 3, the gap formed between the overlapping surfaces of band B is It is wide on the press 40 side and narrows toward the left press 49 side, but due to the vibration of the vibrating rod 30, the heating plate 20 is clamped and fixed to the upper end of the vibrating rod 30 via a pair of clamping plates 25 and 26. It is inserted precisely into the slight gap between the overlapping surfaces of band B.

Next, the trochanter 47 provided at the lower end of the intermediate press 45 ascends the mountain of the cam 63 that rotates together with the camshaft 60, and as a result, the intermediate press 45 rises, and the upper edge of the press part 45' at the upper end of the intermediate press 45 rises. The lower blade 46 formed at the upper end of the press part 40' of the right press 40 and the upper blade 42 formed at the upper edge of the outlet of the insertion hole 41 of the press part 40' at the upper end of the right press 40 cut the supply end side of the band B, and the press part 45 of the middle press 45. After applying pressure to band B, which is in an overlapping state with the lower surface of slide table 33, and heating plate 20 inserted between the overlapping surfaces of band B, and heating and melting band B for about 003 seconds, The press 45 is once lowered and separated from the slide table 33. At the same time, the trochanter 31 of the vibrating rod 30 ascends the mountain of the cam 61 and the vibrating rod 3
0 vibrates in the clockwise direction in FIG. Then, the medium press 45 is raised again to bond the overlapping surfaces of the band B in the molten state.

Thereafter, each press member descends and returns to its original position, and a cam (not shown) rotating together with the shaft 60 moves the frame 34.
The slide table 33 vibrates counterclockwise in the figure.
is removed from between the packaged item and band B. One thing,
6j, the frame 34.3'4 is rotated by the cam 62 rotating together with the shaft 60 in the direction of 1 rotation in FIG. i! ! !
At l1JIj7, the slide table 33 advances above each brace member, and the main roller 53 and upper roller 54 supply the band B to the outside of the main body of the book wrapping machine or into the arch on the main body (one process of packing is completed). The required time is approximately 15 seconds.

When the band supply ends, the relay x7 that detects this generates a signal, and the b contact X7b is turned off.
Relay X1 is turned off, so relay H2 is turned off, and the supply of high power to the nichrome plate 22 is stopped. In addition, when relay H2 is OFF and the b contact H2b of relay H2 is ON, relay H1 is turned ON again, and the nichrome plate 22 is connected to the first connection circuit, and the voltage of 3.2 V x 8. Applied at OA.

Thereafter, the above steps are repeated, but as mentioned above, when the packaging machine is stopped after the main switch is turned on and until the start button is turned on, the heating plate 2 is connected to the heating plate 2 through the first connection circuit.
0 to approximately 390°C, and when the book wrapping machine is running from turning on the start button until band supply is completed, the heating plate is heated to about 390 degrees Celsius by applying power exceeding that at the time of stop via the second connection circuit. Since an attempt is made to maintain the welding temperature at an appropriate temperature, it is possible to sufficiently replenish the amount of heat from the heating plate that is taken away by the band as the number of times of packaging increases.

According to the third test conducted by the inventor, this is because the plate is kept at the appropriate temperature for band welding (2) As the number of wraps increases, the amount of heat taken by the heating plate by the band is sufficiently replenished.

This can be verified by the third test conducted by the inventor. In other words, the same test conditions as in (1)], and (2) the power and set temperature of the heating plate (a) when the packaging machine is stopped: 3.2V x 8.0A (390°C)
(o') 411L machine 1 [f+R4, 0VX11A (3)
The temperature of the heating plate was measured under the same conditions as in the second test under the conditions of ``Number of packing: 50 times or more'' (Table 3 below).
As shown in Figure 2, the temperature of the heating plate decreases little by little as the number of packaging increases, but it reached 347°C after 50 packaging, and the value shown in Figure 2 indicates the proper band welding obtained in the first test. The temperature was within the range (see Table <1>).

Table 3 In the above embodiments, the timing for energizing the nichrome plate through the second connection circuit was when the packaging machine was running from when the start button was turned on until the end of band supply. In relatively slow packaging, where the time is around 3 seconds,
The timing of energizing the nichrome plate through the second connection circuit is determined while the heating plate force is inserted between the overlapping surfaces of the 5 bands, or when the overlapping surface and the heating plate are pressed by a medium press A] By appropriately setting the temperature between the filters and the like, it is possible to maintain an appropriate temperature for band welding without overheating the heating plate.

Furthermore, although the above example is based on the third test result conducted by the inventor using a band made of polypropylene, the material of the band when implementing the present invention is limited to polypropylene. It is also possible to use a pan made of other heat-fusible materials, and the timing for connecting both circuits to the nichrome plate is determined based on the appropriate welding temperature, packing speed, and other conditions depending on the band material. and the amount of power.

As described above, the present invention includes a fusing means such as a band having a heating plate that can move forward and backward between the overlapping surfaces of the tip side and the supply end side of a band made of a heat-fusible material that is stretched around an object to be packaged. In the packaging machine, the heating plate includes a thin plate-shaped electric heating resistor whose both ends are connected to a current-carrying lead wire, an insulating plate that sandwiches the electric heating resistor in a covering manner, and the insulating plate. It is constituted by a metal body that is housed in a covering and is clamped and fixed, and on the heating plate,
a first connection circuit that supplies a constant power to heat the heating plate to within a band welding appropriate temperature range; and a first connection circuit that supplies a constant power higher than the constant power to heat the heating plate to a band welding allowable temperature range. Since the structure is configured such that the two connection circuits are connected to each other and the two connection circuits are switched by a switch means, the thickness of the outer metal body is not changed, the strength is not reduced, and the number of parts constituting the heating plate is not reduced. In addition, the entire heating plate is thin, and there are few inclusions between the beater and the outer metal body, resulting in high thermal efficiency, making it possible to raise the temperature of the heating plate in a short time, and making it possible to quickly increase the temperature of the heating plate. The heating plate can be inserted accurately between the overlapping surfaces of the leading end side and the supply end side of the overlapping band through a slight gap after being passed, minimizing the movement width of each press member. Not only does it follow the cam well, making high-speed packaging possible, but it also reduces the range of temperature drop that occurs when the heat of the heating plate is taken away by the band due to high-speed and continuous packaging. Since the temperature can be maintained at an appropriate temperature, sufficient melting and strong adhesion of the band polymerization surface are possible.

In addition to the effects mentioned above, by energizing the heating plate through the second connection circuit when the packaging machine 9 is in operation and through the first connection circuit when the packaging machine is stopped by the switch means, Not only for normal packaging, but also for high-speed, long-term continuous packaging, keep the surface temperature of the heating plate at the appropriate temperature for band welding. Non-adhesive, which can finally prevent melting.

In addition, the heating plate is energized via a second connection circuit'5
When the band melts while the packaging machine is running, the surface temperature of the heating plate should be adjusted to the proper temperature for band welding.
This makes it possible to more reliably prevent adhesion from occurring due to changes in the band material, which are harmful effects of excessive melting of the band due to overheating of the heating plate, and from the band being fused. Furthermore, by using a nichrome plate as the electric heating resistor and forming the nichrome plate into a substantially M-shape, it is possible to narrow the convergence of the heating plate without reducing the amount of heat and the strength of the heating plate. Since it is possible to narrow the width of the slide table,
It is now possible to accurately pack even the smallest items.

[Brief explanation of the drawing]

1 to 3 show embodiments of the present invention, and FIG. The figure (B) is a cross-sectional view of the tit booklet (C) shows an example of the
FIG. 3 is a straight view showing the entire apparatus of the present invention. Figure 4 is a side view of the entire device, Figure 5 is a front view of the main parts of the conventional device,
6(A) and 7(A) are exploded perspective views of a conventional heating plate, and FIG. 6(F31) and FIG. 7(B) are main part cross-sectional views of the conventional heating plate. 0; heating plate, 11; mica core, 12,]
] 2; Micah board 13; Nichrome wire, 13a, 13a,
13b; Nik DA plate, 14; Stainless steel plate, 15
i Lead wire, 20; heating plate, 21, 21; mica plate, 22; nichrome plate, 23; m-flat stainless steel tube, 24; lead wire, 25.26. Clamping plate, 27;
Bracket, 28.28; Countersunk, 30; Vibrating rod,
31; Trochanter, 32; Axis, 33; Slide table,
34; Frame, 35.35.35.35; Countersunk, 36; Shaft, 40; Right press, 40'; Press part, 41;
Through hole, 42; Upper blade, 43; Trochanter, 44; Arm, 45; Middle press, 45'; Press part, 4
6; lower blade, 47; trochanter, 48; arm, 4
9; Left press, 49'; Press part, 50; Trochanter, 51;
Arm, 52; Axis, 53; Main roller, 54
; Upper four-ra, 55; Band introduction path, 60; Cam shaft, 61.6-2.63.64; Cam, B; Bar: /F
Hl, H2, Xl,, rl-1tTF Nikki (spontaneous) January 11, 1975, Himochi 3' ``Agency Director General Shiga Manabu 1, llll 5 Displays 1982 Patent Application No. 131926 2, Name of Invention In Packing Machine Relationship between band melting device 3 and the Zurona incident Patent applicant address: 665 Takahama, Ishioka City, Ibaraki Prefecture Name: Kanto Seiki Co., Ltd. 4, agent telephone number (5/l), ) 3077 (principal) address 2-15-12 Ginza, Chuo-ku, Tokyo 104+
11 "Detailed Description of the Invention" column of the specification [1] The "Detailed Description of the Invention" column of the specification is amended as follows. From page 26, line 18 of the specification, ``This means,'' to page 27, line 3, ``This will sufficiently replenish the amount of heat.'' Delete j. [2] Figures 7(A) and 7(B) of the drawings shall be attached as corrected drawings. that's all

Claims (6)

[Claims] (1) In a packaging machine equipped with a band melting means having a heating plate that is movable forward and backward between the overlapping surfaces of the tip end side and the supply end side of a band made of a heat-fusible material stretched around an object to be packed, the heating plate consists of a thin plate-shaped electric heating resistor whose both ends are connected to current-carrying lead wires, an insulating plate that clamps the electric heating resistor in a sheath, and a metal that holds and secures the insulating plate in a sheath. a first connection circuit that supplies constant power to the heating plate to heat the heating plate to within an appropriate band welding temperature range; A band melting device for a packaging machine, characterized in that the device is connected to a second connection circuit that supplies a constant power higher than the constant electric power, and the two connection circuits are switched by a switch means. (2) The switching means causes the heating plate to be energized via a second connection circuit when the packaging machine is running, and is energized via the first connection circuit when the packaging machine is stopped. A band melting device in a packaging machine according to item 1. (3) A band melting device for a packaging machine according to claim 1 or 2, wherein the electric heating resistor is made of a nichrome plate, and the nichrome plate is formed into a substantially M-shape. (4) the metal body is made of a stainless steel tube, and a mica plate having an electric heating resistor sandwiched therein is housed within the stainless steel tube;
Claim 1, wherein the stainless steel pipe is flattened.
A band melting device for a packaging machine according to item 1 or 2. (5) In the packaging machine according to claim 1 or 2, wherein the power of the first connection circuit is 3.2V x 8A, and the power of the second connection circuit is 4V x 11A. Band melting equipment. (6) A band melting device for a packaging machine according to claim 2, wherein the heating plate is energized via a second connection circuit only when melting the band.