JPS624282B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an automatic packaging machine that automatically wraps a product with a packaging film. The present invention relates to an automatic packaging machine that cross-seals a packaging film that has been sealed in the feeding direction at right angles to the feeding direction of the product.

Prior Art FIG. 4 shows a conventional packaging machine. This packaging machine is designed to automatically package a product 2 with a packaging film 1, and has a feed direction sealing device 3 and a cross sealing device 4. The feed direction sealing device 3 is arranged between the infeed conveyor 5 and the intermediate conveyor 6, and the cross sealing device 4 is arranged between the intermediate conveyor 6 and the outgoing conveyor 7.

The infeed conveyor 5 has a plurality of product-engaging fingers 8, each equally spaced and fixed to a belt. Each finger 8 of the infeed conveyor 5 is thus engaged with a product 2 and the product 2 is fed successively with a constant pitch to the position of the sealing device 3 in the feed direction. The sealing device 3 consists of a pair of left and right roller-shaped heat sealing members 9,
The seal members 9 rotate in opposite directions.

On the other hand, the packaging film 1 is unwound from the take-up roll 10, and the pinch roller 11 and former 12
be guided by. The pinch roller 11 is for pulling out the packaging film 1 from the take-up roll 10. The packaging film 1 is guided to the former 12,
It surrounds the product 2 and is sandwiched between the sealing members 9 of the sealing device 3. Therefore, the packaging film 1 surrounding the product 2 is heat-sealed along the bottom surface of the product 2, and is sealed in the feeding direction parallel to the feeding direction of the product 2.

Moreover, the intermediate conveyor 6 consists of a pair of upper and lower belts. Therefore, after the packaging film 1 is sealed in the feed direction, the packaging film 1 and the product 2 are sandwiched between the belts of the intermediate conveyor 6, and the product 2 is continuously moved from the position of the feed direction sealing device 3 to the position of the cross sealing device 4. sent to. The cross seal device 4 includes a pair of upper and lower rotary heat seal members 14H and 14L.
The seal member 14H rotates counterclockwise around the axis 15H, and the seal member 14L rotates clockwise around the axis 15L. Also,
The seal members 14H and 14L rotate with mutually symmetrical phases. Therefore, the packaging film 1 is sealed between each product 2 by the sealing member 14 of the packaging 4.
It can be sandwiched between H and 14L, cross-sealed at right angles to the feeding direction of the product 2, and then fused and cut.
Therefore, the product 2 can be automatically packaged. The packaged product 2 is guided to a delivery conveyor 7 and sent out to the outside.

Problems with the Prior Art By the way, in this type of automatic packaging machine, it is not only the same product 2 that is packaged. It is required to package various products 2. Therefore, each product 2 has a different length, and it is necessary to take the length of the product 2 into consideration, and it is necessary to adjust the feeding pitch. For example, in the case of short products, if they are continuously fed to the positions of the feed direction sealing device 3 and the cross sealing device 4 at the same feeding pitch as long products, the intervals between each product 2 are too large, making it difficult to package them properly. I can't. After the packaging film 1 is cross-sealed, it is inevitable that the packaging film 1 becomes loose. Therefore, it is necessary to reduce the feed pitch so that the intervals between the products 2 do not become too large. On the other hand, in the case of long products 2, it is necessary to increase the feed pitch so that the distance between the products 2 does not become small. To achieve this, the transmission
V ₁ may be transmission connected to the intermediate conveyor 6 and the motor M ₁ . and motor M ₁ and transmission V ₁
The intermediate conveyor 6 is driven by. Further, the speed changer _V1 may be operated to adjust its gear ratio in accordance with the length of the product 2, thereby adjusting the speed of the intermediate conveyor 6. Product 2 by infeed conveyor 5
is fed at a fixed pitch, but by lowering the feed speed of the intermediate conveyor 6, the feeding pitch of each product 2 can be reduced when the products 2 are transferred from the feed conveyor 5 to the intermediate conveyor 6. Therefore, the feed pitch of the product 2 sent to the position of the cross seal device 4 can be reduced. On the other hand, if the feed speed of the intermediate conveyor 6 is increased, the feed pitch of the products 2 sent to the position of the cross-sealing device 4 can be increased.
Therefore, the feed pitch can be adjusted depending on the length of the product 2. In addition, the transmission V ₁
is transmission connected to the pinch roller 11 of the packaging film 1, so that the packaging film feeding speed can be made to correspond to the feeding speed of the intermediate conveyor 6. Furthermore, when the transmission V ₁ is transmission-coupled to the sealing member 9 of the feed-direction sealing device 3, the rotational speed of the sealing member 9 can be made to correspond to the feeding speed of the intermediate conveyor 6 and the supplying speed of the packaging film 1. Therefore, the packaging film 1 is sealed in the feed direction parallel to the feed direction of the product 2 without any hindrance.

In this case, even if the feed speed of the intermediate conveyor 6 is adjusted, the product 2
are fed at a constant pitch and at a constant speed, and the time interval at which each product 2 is fed to the location of the cross-sealing device 4 does not change. Therefore, there is no need to change the period of the rotation cycle of the cross seal device 4. However, when adjusting the feed rate of the intermediate conveyor 6, each product 2 is transferred to the cross sealing device 4.
The timing at which the data is sent to is affected by this. Therefore, in order for the packaging film 1 to be sandwiched between the sealing members 14H and 14L of the sealing device 4 between each product 2, the phase of the feed conveyor 5 and the sealing operation phase of the cross sealing device 4, that is, the finger 8 and the phases of the seal members 14H and 14L must be adjusted relatively. To achieve this, a phase adjustment mechanism _D1 , such as a differential gear, is transmission coupled to the infeed conveyor 5 and the motor _M1 , and the infeed conveyor 5 is driven by the motor _M1 and the adjustment mechanism _D1 . Then, the phase of the finger ₈ may be adjusted by operating the phase adjustment mechanism D1 in accordance with the feed speed of the intermediate conveyor 6. As a result, the phase of the feed conveyor 5 and the phase of the cross sealing device 4 can be adjusted relatively, and the packaging film 1 can be moved between each product 2 by the sealing device 4.
It can be sandwiched between the seal members 14H and 14L. In addition, when the packaging film 1 is cross-sealed by the cross-sealing device 4, the sealing members 14H and 14L of the cross-sealing device 4 rotate in opposite directions and move in the feeding direction of the product 2;
This moving speed also needs to correspond to the feeding speed of the intermediate conveyor 6. To achieve this, the velocity distribution adjustment mechanism _V2 may be transmission connected to the seal members 14H, 14L and the motor _M1 , and the seal members 14H, 14L may be driven by the motor _M1 and the adjustment mechanism _V2 . Then, when the speed distribution adjustment mechanism V ₂ is operated according to the feed speed of the intermediate conveyor 6 and the speed distribution within one rotation cycle of the sealing device 4 is adjusted, the moving speed of the cross sealing device 4 during cross sealing is adjusted to the intermediate conveyor 6. 6 feed speeds. Therefore, the packaging film 1 can be cross-sealed accurately.

However, conventionally, intermediate conveyor transmission
V ₁ , phase adjustment mechanism D ₁ and velocity distribution adjustment mechanism V ₂
The problem was that it was not easy to operate. Intermediate conveyor transmission V ₁ and each adjustment mechanism
D ₁ and V ₂ were each provided with an operation handle, and the intermediate conveyor transmission V ₁ and each adjustment mechanism D ₁ and V ₂ were operated individually, but each time a different product 2 was packaged, it was necessary to The transmission ratio of the intermediate conveyor transmission V ₁ must be adjusted accordingly. After that, each adjustment mechanism D ₁ ,
I had to operate the V ₂ , which was extremely troublesome.
Moreover, it is extremely difficult and time-consuming to accurately operate the intermediate conveyor transmission V ₁ and the adjustment mechanisms D ₁ and V ₂ so that the air 2 is packaged accurately.

Technical Problem of the Invention Therefore, the present invention solves the above-mentioned conventional problems and facilitates the operation of the intermediate conveyor transmission, the cross-seal phase adjustment mechanism and the cross-seal speed distribution adjustment mechanism of this kind of automatic packaging machine. It was done with the purpose of

Technical Means of the Invention The present invention provides a feeding direction sealing device that seals a packaging film surrounding a product in a feeding direction parallel to the product feeding direction, and a feeding direction sealing device that seals a packaging film surrounding a product in a feeding direction parallel to the product feeding direction, and a feeding direction sealing device that seals a packaging film that has been sealed in the feeding direction in a direction perpendicular to the product feeding direction. a cross-sealing device for sealing; an infeed conveyor that continuously conveys the products at a constant pitch to the position of the feed-direction sealing device; and a feed conveyor that continuously transports the products from the position of the feed-direction sealing device to the position of the cross-sealing device. an intermediate conveyor for feeding; an intermediate conveyor transmission for adjusting the feeding speed of the intermediate conveyor according to the length of the product; and an intermediate conveyor transmission for relatively adjusting the phase of the feeding conveyor and the phase of the cross seal device. An automatic packaging machine equipped with a phase adjustment mechanism and a speed distribution adjustment mechanism that adjusts the speed distribution of the cross-sealing device within one operation cycle and makes the movement speed during cross-sealing correspond to the feed speed of the intermediate conveyor. , a differential gear having an input gear 22, an output gear 23 and a phase adjustment gear 24 is used as the phase adjustment mechanism _D1 , and 2 is used as the speed distribution adjustment mechanism _V2 .
Using a crank joint with two rotational axes 28, 29, the intermediate conveyor transmission V ₁
A rotation transmission member such as a worm 26 is provided on this adjustment rotation shaft 16 to transmit the rotation of the adjustment rotation shaft 16 to the support shaft 25 of the phase adjustment gear 24. transmission connected to the member, further forming a feed screw on the adjustment rotation shaft 16, supporting one rotation shaft 29 of the crank joint on a carriage 30, and screwing the carriage 30 onto the feed screw of the adjustment rotation shaft 16; It is characterized by:

Effect of the invention Therefore, according to the invention, the adjustment rotation shaft 1
6 can be rotated to adjust the gear ratio of the intermediate conveyor transmission V ₁ and adjust the feed speed of the intermediate conveyor. At the same time, the phase adjustment gear 24 of the differential gear moves toward the adjustment rotation shaft 16.
The phase of the feed conveyor and the phase of the cross seal device are adjusted relative to each other in conjunction with the rotation transmission member. Furthermore, the carriage 30 of the crank joint and the rotating shaft 2 are further adjusted by the screw feeding action of the adjusting rotating shaft 16.
9 is moved to adjust the velocity distribution within one operating cycle of the cross seal device.

Embodiments of the Invention Examples of the invention will be described below. FIG. 1 shows an automatic packaging machine according to the invention. This packaging machine has a feed direction sealing device 3 and a cross sealing device 4 similar to those shown in FIG. Furthermore, it has a feed conveyor 5, an intermediate conveyor 6, a feed conveyor 7, a pinch roller 11, and a former 12 similar to those shown in FIG. Therefore, the packaging film 1 surrounding the product 2 can be sealed in the feeding direction parallel to the feeding direction of the product 2, and the packaging film 1 sealed in the feeding direction can be cross-sealed at right angles to the feeding direction of the product 2. Therefore, the product 2 can be automatically wrapped with the packaging film 1. moreover,
This packaging machine has an intermediate conveyor transmission similar to that shown in Figure 4.
V ₁ , phase adjustment mechanism D ₁ and velocity distribution adjustment mechanism V ₂
has.

Further, as shown in FIGS. 2 and 3, this packaging machine has an adjustment rotation shaft 16 for adjusting the gear ratio of the intermediate conveyor transmission V ₁ , and the adjustment rotation shaft 16 is connected to the motor M ₂ is transmission connected.
The transmission V ₁ is a lever-type continuously variable transmission and is transmission connected to the intermediate conveyor 6 and the motor M ₁ . A slot 18 is formed on the lever 17 of the transmission _V1 , and a nut 19 is formed on the adjustment rotation shaft 16.
are screwed together, and the slot 18 is fitted into the pin 20 of the nut 19. Therefore, when the adjustment rotation shaft 16 is rotated, the nut 19 is moved by its screw feeding action, and the lever 17 is moved to the fulcrum 21.
can be swung around. This adjusts the gear ratio of the transmission V ₁ , and the intermediate conveyor 6
The feed rate can be adjusted. This transmission
V ₁ is of the type that can be operated at will, regardless of whether the machine is running or stopped.

Phase adjustment mechanism D ₁ has input gear 22 and output gear 2
3 and a differential gear having a phase adjustment gear 24. Input gear 22 is motor _M1
The output gear 23 is transmission connected to the feed conveyor 5, and the phase adjustment gear 24 is connected to the support shaft 2.
It is fixed at 5. A rotation transmission member such as a worm 26 is provided on the adjustment rotation shaft 16 of the intermediate conveyor transmission V ₁ , and a support shaft 25 of the phase adjustment gear 24 is transmission connected to the rotation transmission member of the adjustment rotation shaft 16 . In this embodiment, a worm wheel 27 is meshed with the worm 26 of the adjustment rotation shaft 16, and the support shaft 25 of the phase adjustment gear 24 is transmission connected to the worm wheel 27. Therefore,
When the adjustment rotation shaft 16 is rotated, the support shaft 25 and the phase adjustment gear 24 are rotated by the worm wheel 27.
can be rotated. Thereby, the phase of the feed conveyor 5 and the phase of the cross seal device 4 can be adjusted relative to each other.

In addition, the speed distribution adjustment mechanism V ₂ has two rotating shafts 2.
The rotating shafts 28, 29 are arranged parallel to each other and are eccentric by a certain amount. Further, the rotating shaft 28 is supported at a fixed position, and the seal member 14H of the cross seal device 4,
It is transmission connected to 14L. The rotating shaft 29 is transmission connected to the motor _M1 . A feed screw is formed on the adjustment rotation shaft 16 of the intermediate conveyor transmission V ₁ , one rotation shaft 29 of the crank joint is supported by a carriage 30 , and the carriage 30 is screwed to the feed screw of the adjustment rotation shaft 16 . . moreover,
A pin 32 is fixed to a crank 31 of the rotating shaft 28, a slot 34 is formed in the crank 33 of the rotating shaft 29, and the pin 32 is slidably inserted into the slot 34. Therefore, when the adjusting rotation shaft 16 is rotated, the carriage 30 can be moved by its screw feeding action. Therefore,
The amount of eccentricity of the rotating shafts 28 and 29 can be adjusted. As a result, the speed distribution within one rotation cycle of the arm 31, the rotating shaft 28, and the heat seal members 14H, 14L can be adjusted.

In the automatic packaging machine configured as described above,
When the drive motor M ₂ is driven according to the length of the product 2 and the adjustment rotation shaft 16 is rotated, the nut 19 of the intermediate conveyor transmission V ₁ is subjected to the screw feeding action of the adjustment rotation shaft 16 and the adjustment rotation shaft 16 is rotated. move along.
Therefore, the lever 17 swings around the fulcrum 21, the gear ratio of the transmission _V1 is adjusted, and the feed speed of the intermediate conveyor 6 is adjusted. Therefore, the feed speed of the intermediate conveyor 6 can be adjusted depending on the length of the product 2, and the product feed pitch can be adjusted.

At the same time, the worm 2 of the phase adjustment mechanism D ₁
6 and the worm wheel 27 rotate. Therefore, the support shaft 25 and the phase adjustment gear 24 rotate, and the phase of the feed conveyor 5 and the phase of the cross seal device 4 are relatively adjusted. Furthermore, the carriage 30 of the speed distribution adjustment mechanism V ₂ receives the screw feeding action of the rotating shaft 16 and moves along the rotating shaft 16 . Therefore, the amount of eccentricity of the rotating shafts 28 and 29 is adjusted, and the speed distribution within one rotation cycle of the cross seal device 4 is adjusted.

Moreover, in this case, what determines the feed speed of the intermediate conveyor 6 is the number of rotations of the rotating shaft 16 of the operating mechanism. The phase of the cross-sealing device 4 relative to the phase of the infeed conveyor 5 and the speed distribution within one rotation cycle of the cross-sealing device 4 are also similar.
Therefore, a certain relationship can be established between these three elements. Therefore, by adjusting the feed speed of the intermediate conveyor 6, the phase of the infeed conveyor 5 and the phase of the cross seal device 4 can be adjusted relative to each other accordingly. Furthermore, the speed distribution within one rotation cycle of the cross-seal device 4 can be adjusted according to the feed speed of the intermediate conveyor 6, and the movement speed during cross-sealing can be made to correspond to the movement speed of the intermediate conveyor 6.

Therefore, the packaging film 1 can be cross-sealed accurately in accordance with the length of the product 2, and the product 2 can be packaged accurately. Further, the operation is easy, as it is only necessary to adjust the feed speed of the intermediate conveyor 6 according to the length of the product 2. The other two factors can be adjusted depending on the feed speed of the intermediate conveyor 6 without special consideration.

Effects of the Invention As explained above, according to the present invention, when the adjustment rotation shaft 16 of the intermediate conveyor transmission V ₁ is rotated, the phase adjustment gear 2 of the differential gear
4 rotates, and the carriage 30 of the crank joint and the rotating shaft 29 move. Therefore, adjustment rotation axis 1
6 to adjust the gear ratio of the intermediate conveyor transmission V ₁ and the feed speed of the intermediate conveyor 6, the phase of the cross seal device 4 relative to the phase of the infeed conveyor 5 can be adjusted, and the cross seal The speed distribution within one rotation cycle of the device 4 can be adjusted. Therefore, it is not necessary to separately operate the intermediate conveyor transmission V ₁ phase adjustment mechanism D ₁ and the speed distribution adjustment mechanism V ₂ as in the prior art. In addition, regarding the feed speed of the intermediate conveyor 6, the phase of the cross seal device 4 relative to the phase of the infeed conveyor 5, and the speed distribution within one rotation cycle of the cross seal device 4, the number of rotations of a common single adjustment rotating shaft 16 is determined. These three elements are determined by: Therefore, these three elements can always have a constant relationship, can be made to correspond to each other, and can be adjusted accurately. As a result, the intermediate conveyor transmission V ₁ and the adjustment mechanisms D ₁ and V ₂ can be easily operated to achieve the intended purpose.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the invention, Fig. 2 is a plan view of the operating mechanism shown in Fig. 1, and Fig. 3 is a side view showing an embodiment of the invention.
FIG. 4 is a side view of a conventional packaging machine. 1... Packaging film, 2... Product, 3... Feeding direction sealing device, 4... Cross sealing device, 5...
...Infeed conveyor, 6...Intermediate conveyor, V ₁
...Intermediate conveyor transmission, _D1 ...Phase adjustment mechanism, _V2 ...Speed distribution adjustment mechanism, _M1 , _M2 ...Motor, 16...Rotating shaft.

Claims (1)

[Claims] 1. A feed direction sealing device that seals a packaging film surrounding a product in the feed direction parallel to the product feed direction; a cross seal device that cross seals the feed direction sealed packaging film perpendicular to the product feed direction; an infeed conveyor that continuously conveys the products at a constant pitch to the position of the feed direction sealing device; an intermediate conveyor that continuously conveys the products from the position of the feed direction seal device to the position of the cross seal device; an intermediate conveyor transmission for adjusting the feed speed of the intermediate conveyor according to the length; a phase adjustment mechanism for relatively adjusting the phase of the feed conveyor and the phase of the cross seal device; and the cross seal. In an automatic packaging machine equipped with a speed distribution adjustment mechanism that adjusts the speed distribution within one operation cycle of the device and makes the movement speed during cross sealing correspond to the feed speed of the intermediate conveyor, the phase adjustment mechanism _D1 is A differential gear having an input gear 22, an output gear 23 and a phase adjustment gear 24 is used, a crank joint having two rotating shafts 28 and 29 is used as the speed distribution adjustment mechanism _V2 , and the intermediate A rotation transmission member such as a worm 26 is provided on the adjustment rotation shaft 16 to adjust the gear ratio of the conveyor transmission V ₁ , and the support shaft 25 of the phase adjustment gear 24 is rotated through the adjustment rotation. A rotation shaft 29 of the crank joint is connected to the rotation transmission member of the shaft 16 for transmission, and a feed screw is formed on the adjustment rotation shaft 16.
An automatic packaging machine characterized in that the carriage 30 is screwed onto a feed screw of the adjustment rotation shaft 16.