JP7384395B2 - Sealing device and splicer - Google Patents

Description

The present invention relates to a sealing device and a splicer.

The packaging device is provided with a film supply device that supplies a strip-shaped film wound around a roll of raw material. When the remaining amount of film on the original roll becomes small, the original roll needs to be replaced. However, if the supply of film is stopped when replacing the original roll, productivity will decrease. Therefore, a splicer is used as a film supply device that splices the film onto a new roll of film without stopping the supply of the film (for example, see Patent Document 1).

In the splicer described in Patent Document 1, a plurality of film rolls are set on a rotary disk, and a first film is supplied from a first film roll among these film rolls, and a first film is supplied from a first film roll near the first film roll. A second film, which is unwound from a second film roll that is on standby, is prepared by being superimposed on the first film. A sealing device is provided at the location where the first film and the second film are overlapped, and a pull-out roller for drawing out the first film is provided downstream of the sealing device. The sealing device includes a first sealer, a second sealer that moves toward and away from the first sealer, and a cutting blade housed in the second sealer. The first sealer is provided so as to be movable in the depth direction, and the first sealer pulls toward the back side in order to prevent the original fabric roll from hitting the first sealer when the rotary disk rotates. After the rotating disk rotates, the first sealer returns to the front side.

When the remaining amount of the first film on the first fabric roll decreases, the pull-out roller stops, but the drive roller on the downstream side of the pull-out roller continues to supply the first film, and the pull-out roller and drive roller Intervening dancer rollers gradually reduce the path length of the first film. At that time, the second sealer approaches the first sealer, the first film and the second film are sandwiched between them, and the first film and the second film are joined. Furthermore, the joint portion is cut by the cutting blade of the sealing device. Thereafter, the second film is pulled out from the second fabric roll by a pull-out roller. Thereafter, the position of the original fabric roll changes as the rotating disk rotates, but the first sealer pulls the original fabric roll to the back side to prevent the original fabric roll from hitting the first sealer when the rotating disk rotates. After the rotating disk rotates, the first sealer returns to the front side. After that, the first fabric roll is replaced with a new fabric roll.

On the other hand, Patent Document 2 discloses a box motion type end seal device provided in a pillow packaging device. In this end sealing device, the upper sealer and the lower sealer move toward and away from each other by moving along a box motion type locus. Even if the upper and lower sealers approach each other, there is a gap between the upper and lower sealers, so the upper sealer is further lowered by the cylinder, and the film is sandwiched between these sealers and sealed. be done. Further, the upper sealer is covered by a pair of cooling blocks that can be opened and closed, and these cooling blocks are connected to the cylinder via a pantofluff type link mechanism. Therefore, the raising and lowering of the upper sealer and the opening and closing of the cooling block are linked; when the upper sealer descends, the cooling block opens, and when the upper sealer ascends, the cooling block closes.

JP2013-086916A Japanese Patent Application Publication No. 11-11434

In the splicer described in Patent Document 1, since the first sealer is provided so as to be able to reciprocate in the depth direction, a space for the first sealer is required on the back side, and there is a problem that the splicer becomes large. In order to solve this problem, it is also possible to fix the first sealer to a rotary disk for each roll of raw material. In such a case, when setting the end of the film unrolled from the replaced original roll onto the fixture near the first sealer, careful work is required to prevent the film from touching the first sealer. do.

On the other hand, in the end seal device described in Patent Document 2, in addition to a power source that moves the upper sealer and the lower sealer along a box motion type locus, a cylinder that raises and lowers the upper sealer is provided, and the cylinder is used to move the upper sealer and the lower sealer. This allows the cooling block to open and close. Therefore, the number of parts of the end seal device is large, which causes an increase in the cost of the end seal device.
Furthermore, the pantograph-type link mechanism requires many links. Therefore, the number of parts of the end seal device is large, which causes an increase in the cost of the end seal device.

Therefore, an object of the present invention is to prevent the film from touching the sealer when setting the film. Furthermore, the present invention aims to reduce the number of parts and cost of the sealing device by opening and closing a hood that covers the sealers using the power of the movement of the pair of sealers in the sealing device toward and away from each other.

In order to solve the above problems, a sealing device is provided such that a first sealer, a second sealer provided on the opposite side of the first sealer with respect to the film, and the first sealer and the second sealer come into contact with and separate from each other. a drive unit that drives at least one of the first sealer and the second sealer; a pair of hoods that cover the first sealer and are provided so as to be openable and closable; and as the first sealer and the second sealer approach each other; an opening/closing mechanism that opens the pair of hoods and closes the pair of hoods as the first sealer and the second sealer are separated, and the opening/closing mechanism is provided on each of the pair of hoods and is capable of opening and closing. A pair of operating cams provided on the second sealer and a pair of operating cams provided on the second sealer that enters between the pair of operating cams as the first sealer and the second sealer approach, The cam follower includes a cam follower that comes out from between the pair of actuating cams as they are separated, and a biasing portion that urges the pair of hoods and the pair of actuating cams in a direction to close them.

According to the above, when the first film and the second film approach each other due to the power of the drive section, the cam follower enters between the pair of actuating cams, and the pair of actuating cams and the pair of hoods open. When the first film and the second film are separated by the power of the driving section, the cam follower comes out from between the pair of operating cams, and the pair of operating cams and the pair of hoods are closed by the biasing section.
Since the pair of hoods is opened and closed using the power of the drive unit for moving the first sealer and the second sealer toward and away from each other, the number of parts and cost of the sealing device can be reduced.
Furthermore, since the hood is closed, the operator's hands do not come into contact with the hot first sealer when replacing the film or maintaining the equipment. Therefore, work can be done safely. The film does not come into contact with the high-temperature first sealer, making it easy to replace the film.

A splicer includes a rotary disk, a pull-out roller provided on the radially outer side of the rotary disk, a motor for driving the pull-out roller, and a splicer that is attached to the rotary disk so as to be arranged in the circumferential direction, and a strip-shaped film is wound around the splicer. a plurality of support shafts on which the rolled original fabric rolls are respectively supported; and a plurality of support shafts that are attached to the rotary disk so as to be arranged in the circumferential direction of the rotary disk, and are respectively disposed between the support shafts in the circumferential direction of the rotary disk. a plurality of guide rollers; a plurality of folding rollers attached to the rotary disc so as to be arranged in a circumferential direction of the rotary disc; and disposed on the radially outer side of each of the plurality of support shafts; a plurality of fasteners arranged in the circumferential direction of the rotary disk; a plurality of fasteners arranged in the circumferential direction of the rotary disk; a plurality of first sealers, which are attached to the rotary disk so as to cover each of the plurality of first sealers, and which are arranged between each of the plurality of folding rollers and each of the plurality of fasteners, and which can be opened and closed. and a second sealer provided on the radially outer side of the rotary disk.

According to the above, the film can be easily replaced without the film touching the high-temperature first sealer.

According to the present invention, the number of parts and cost of the sealing device can be reduced. The pair of hoods prevents the worker's hands from touching the hot first sealer, allowing the worker to work safely. The film can be easily replaced without the film touching the first sealer at high temperature.

It is a perspective view of the sealing device in a 1st embodiment. FIG. 3 is a perspective view of the sealing device. FIG. 3 is a cross-sectional view of essential parts of the sealing device. FIG. 3 is a cross-sectional view of essential parts of the sealing device. FIG. 3 is a front view of a splicer provided with the sealing device. It is a front view of the sealing device in a 2nd embodiment. FIG. 2 is a side view of a horizontal pillow packaging device provided with the sealing device.

Embodiments will be described below with reference to the drawings. However, although various technically preferable limitations are attached to the embodiments described below, the scope of the present invention is not limited to the following embodiments and illustrated examples.

<First embodiment>
1 and 2 are perspective views of the sealing device 1. FIG. 3 and 4 are sectional views of essential parts of the sealing device 1.
The sealing device 1 includes a first sealer 30, a second sealer 31, an actuator 33, a cutting blade 34, an actuator 35, a first block 36, a second block 37, a first base 38, a second base 39, a hood 41, 42 and an opening/closing mechanism 49.

The first block 36 and the second block 37 are attached to the same member or separate members so that their longitudinal directions are parallel to each other. The first block 36 and the second block 37 face each other in the vertical direction with an interval between them. A first base 38 is attached to the upper surface of the first block 36, a first sealer 30 is attached to the upper surface of the first base 38, and the first sealer 30, the first base 38, and the first block 36 are connected to each other. fixed to each other. A second base 39 is attached to the lower part of the second block 37 so as to be movable in the vertical direction relative to the second block 37 . A second sealer 31 is fixed to the lower surface of the second base 39. Therefore, the second sealer 31 is provided so as to be movable in the vertical direction relative to the second block 37 together with the second base 39. Here, the longitudinal direction of the first sealer 30 and the second sealer 31 is parallel to the longitudinal direction of the first block 36 and the second block 37, and the moving direction of the second sealer 31 is parallel to the longitudinal direction of the first sealer 30 and the second sealer 37. It is perpendicular to the longitudinal direction of the sealer 31, the first block 36, and the second block 37. Further, the cross sections shown in FIGS. 3 and 4 are parallel to the moving direction of the second sealer 31 and in the longitudinal direction of the first sealer 30, the second sealer 31, the first block 36, and the second block 37. perpendicular to

The strip-shaped film is conveyed so as to pass through the area between the first sealer 30 and the second sealer 31. The transport direction of the film is a direction perpendicular to the moving direction and the longitudinal direction of the second sealer 31. The film may be conveyed in a rolled-up cylindrical state, or may be conveyed in a belt-like state without being rolled up. A film different from the film to be transported may be superimposed on the film to be transported between the first sealer 30 and the second sealer 31.

When the second sealer 31 approaches the first sealer 30 below, the film is sandwiched between the first sealer 30 and the second sealer 31 and heat sealed. On the other hand, when the second sealer 31 separates upward from the first sealer 30, the film is released from the first sealer 30 and the second sealer 31.

An actuator 33 that drives the second sealer 31 in the vertical direction is attached to the second block 37. The actuator 33 is, for example, an air cylinder or an electromagnetic solenoid that advances and retreats a plunger, piston, or rod.

A cutting blade 34 is housed inside the second sealer 31 so as to be movable in the vertical direction relative to the second sealer 31 . This cutting blade 34 is connected to an actuator 35 that drives the cutting blade 34 in the vertical direction. The actuator 35 is attached to the top of the second sealer 31.

A pair of hoods 41 and 42 that cover the first sealer 30 are provided on the first block 36 so as to be openable and closable. Specifically, the rotational axes of the shafts 41a and 42a are perpendicular to the longitudinal direction of the first sealer 30, the second sealer 31, the first block 36, and the second block 37, and the moving direction of the second sealer 31. Shafts 41a and 42a are attached to both longitudinal ends of the first block 36, the lower end of the hood 41 is rotatably attached to the first block 36 by the shaft 41a, and the lower end of the hood 42 is attached to the first block 36 by the shaft 42a. is rotatably attached to. Spur gears 41b and 42b are attached to the shafts 41a and 42a, respectively, and these spur gears 41b and 42b mesh with each other. When the hoods 41 and 42 swing in a direction away from each other about the shafts 41a and 42a, respectively, the hoods 41 and 42 are opened and the first sealer 30 is exposed. When the hoods 41 and 42 swing toward each other using the shafts 41a and 42a as fulcrums, the hoods 41 and 42 close, and the first sealer 30 is covered by the hoods 41 and 42.

The hoods 41 and 42 are formed with a large number of heat radiation ports 41c and 42c, respectively. The heat of the first sealer 30 is radiated through the heat radiation ports 41c and 42c, thereby preventing the insides of the hoods 41 and 42 and the first sealer 30 from being overheated. The first sealer 30 is spaced apart from the inner surfaces of the hoods 41 and 42, and the heat of the first sealer 30 is not directly conducted to the hoods 41 and 42. The hoods 41 and 42 are made of a material having heat resistance and low thermal conductivity (for example, resin or ceramic), but may also be made of a metal material such as stainless steel or aluminum. Moreover, a sheet having heat resistance and low thermal conductivity may be attached to the inner surface of the hoods 41 and 42, or a paint having heat resistance and low thermal conductivity may be applied.

Opening and closing of the hoods 41 and 42 is realized by an opening and closing mechanism 49. The opening/closing mechanism 49 opens the hoods 41 and 42 as the first sealer 30 and the second sealer 31 approach, and closes the hoods 41 and 42 as the first sealer 30 and the second sealer 31 move apart. The opening/closing mechanism 49 includes operating cams 43, 44, a leaf spring 46, a bracket 47, and a cam follower 48.

In order to open the hoods 41, 42, actuating cams 43, 44 are attached to one longitudinal end of the hoods 41, 42, respectively. When the hoods 41, 42 are closed, the lower parts 43a, 44a of the operating cams 43, 44 are close to each other, and the upper parts 43b, 44b of the operating cams 43, 44 are open in a V-shape. When the hoods 41, 42 are open, the lower parts 43a, 44a of the operating cams 43, 44 are also opened in a V-shape, and the upper parts 43b, 44b are opened more widely.

A leaf spring 46 is provided on the first block 36. This plate spring 46 is a biasing portion that biases the hoods 41, 42 and the actuating cams 43, 44 in a direction to close each other.

A bracket 47 is attached to one longitudinal end of the second base 39 or the second block 37 so as to hang down, and a cam follower 48 is attached to the lower end of the bracket 47. When the second sealer 31 is spaced upward from the first sealer 30, the cam follower 48 is spaced upward from the operating cams 43 and 44. When the second sealer 31 is in contact with the first sealer 30, the cam follower 48 is located between the lower portions 43a and 44a of the operating cams 43 and 44.

The operation of the sealing device 1 will be explained below.
The actuator 33 operates in the advancing direction. Then, as the second sealer 31 approaches the first sealer 30, the cam follower 48 moves downward together with the second sealer 31, and the cam follower 48 enters between the upper parts 43b and 44b of the operating cams 43 and 44. When the cam follower 48 further descends, the cam follower 48 enters between the lower portions 43a and 44a of the operating cams 43 and 44. Then, the operating cams 43 and 44 open against the elastic force of the leaf spring 46, and the hoods 41 and 42 also open. Therefore, the first sealer 30 is exposed.

When the film is sandwiched between these sealers 30 and 31, the hoods 41 and 42 are in the most open state. The film sandwiched between the sealers 30 and 31 is sealed by the heat of the sealers 30 and 31.

Next, actuator 35 is activated. Then, the cutting blade 34 is projected from the first sealer 30 into the recess of the second sealer 31, and the film is cut by the cutting blade 34. Thereafter, the cutting blade 34 is drawn into the first sealer 30 by the actuator 35. Note that the timing at which the cutting blade 34 is drawn into the first sealer 30 may be the same as the timing at which the second sealer 31 leaves the first sealer 30 as described later.

Next, the actuator 33 operates in the backward direction. Then, the second sealer 31 separates from the first sealer 30 and the film is released from the sealers 30 and 31. The cam follower 48 moves upward together with the second sealer 31, and the cam follower 48 passes upward from between the operating cams 43 and 44. Then, the operating cams 43 and 44 are closed by the elastic force of the leaf spring 46, and the hoods 41 and 42 are also closed. Therefore, the first sealer 30 is covered by the hoods 41 and 42.

The effects of the sealing device 1 configured as described above will be explained below.
Since the first sealer 30 is covered by the hoods 41 and 42, when an operator manually replaces the film 4, his hands do not accidentally touch the hot first sealer 30. Therefore, the film can be replaced safely. Further, the film 4 can be easily replaced without the film 4 touching the first sealer 30 which is at a high temperature.
When the sealers 30 and 31 approach, the hoods 41 and 42 are opened, so that the film is reliably sandwiched between the sealers 30 and 31.
Since the hoods 41 and 42 are opened and closed using the power of the actuator 33 that drives the second sealer 31, there is no need to separately provide an actuator for opening and closing the hoods 41 and 42, and an increase in manufacturing costs can be suppressed.

In the embodiment described above, the movement of the second sealer 31 causes the second sealer 31 to approach and separate from the first sealer 30 . On the other hand, the first sealer 30 may move toward and away from the second sealer 31 by moving the first sealer 30, or the first sealer 30 may move toward and away from the second sealer 31 by moving both the first sealer 30 and the second sealer 31. The second sealers 31 may be moved toward and away from each other.

<Application example>
FIG. 5 is a front view of a splicer using the sealing device 1.
Although three first sealers 30 of the sealing device 1 are provided on the splicer, two, four or more first sealers 30 may be provided on the splicer. The same applies to the first block 36, the first base 38, the hood 41, the hood 42, the operating cam 43, the operating cam 44, and the leaf spring 46.
On the other hand, one second sealer 31 of the sealing device 1 is provided in the splicer. The same applies to the cutting blade 34, actuator 35, second block 37, second base 39, bracket 47, and cam follower 48. One set of actuators 33 is provided in the splicer.
Note that, in order to make the splicer easier to see, in FIG. 5, components other than the first sealer 30 and the second sealer 31 of the sealing device 1 are not illustrated.

A splicer frame 80 is provided in a box shape so as to surround the internal space. A pull-out roller 10 is rotatably provided on the machine frame 80 , and the pull-out roller 10 is connected to a motor 11 . The conveying film 4 drawn out from the supply source roll 2 is sandwiched between a drawing roller 10 and a pinch roller 12.

At the upper right of the pull-out roller 10, one longitudinal end of the second block 37 is attached to the front surface of the machine frame 80. The moving direction of the second sealer 31 is the radial direction of the rotary disk 22, which will be described later.

On the right side of the pull-out roller 10, a circular opening 81 is formed in the front surface of the machine frame 80. A disk-shaped rotary disk 22 is fitted into the opening 81 so as to rotate within a vertical plane. Therefore, the pull-out roller 10 is provided on the outside of the rotary disk 22 in the radial direction.
The rotary disk 22 is connected to a rotary drive machine 23, and the rotary drive machine 23 rotationally drives the rotary disk 22.

The same number of support shafts 24 as the first sealers 30 are attached to the rotary disk 22 at regular intervals in the circumferential direction of the rotary disk 22, and the rotation of the rotary disk 22 causes the support shafts 24 to rotate around the central axis of the rotary disk 22. revolve. Support shafts 24 are provided to be rotatable about their respective central axes. The support shafts 24 are each connected to brakes 25 within the machine frame 80, and the brakes 25 apply a resistance force to the support shafts 24 during rotation. The original fabric rolls 2 are attached to the support shafts 24, respectively. Note that the number of support shafts 24 may be two, four, or more.

Hereinafter, among the three support shafts 24, the support shaft 24 placed at the upper right position (hereinafter referred to as supply source position A) in FIG. The support shaft 24 disposed at the replacement position C (hereinafter referred to as replacement position C) is referred to as the setting shaft 24, and the support shaft 24 disposed at the left position (hereinafter referred to as standby position B) is referred to as the standby shaft 24. Of the three rolls 2, the roll 2 mounted on the supply shaft 24 is called the supply roll 2, and the roll 2 mounted on the setting shaft 24 is called the replaced roll 2, and is on standby. It is called a standby roll 2 attached to a shaft 24. Further, the film 4 pulled out from the supply source roll 2 is referred to as a transport film 4, the film 4 pulled out from the standby roll 2 is referred to as a standby film 4, and the film 4 pulled out from the replaced roll 2 is referred to as a replaced film 4.

Among the three support shafts 24, the standby shaft 24 is located closest to the pull-out roller 10.

Since three guide rollers 26, three folding rollers 27, three fasteners 28, and three first sealers 30 are provided on the rotary disk 22, these guide rollers 26, folding rollers 27, fasteners 28 and the first sealer 30 revolve around the central axis of the rotary disk 22.
The three guide rollers 26 are arranged at equal intervals in the circumferential direction of the rotary disk 22. These guide rollers 26 are arranged between the three support shafts 24 in the circumferential direction of the rotary disk 22, respectively.
Similar to the three guide rollers 26, the three folding rollers 27 are also arranged at equal intervals in the circumferential direction of the rotary disk 22. The same applies to the three fasteners 28 and the three first sealers 30.
The folding rollers 27 are arranged on the radially outer side of the support shaft 24, respectively. The same applies to the guide roller 26, fastener 28, and first sealer 30.

One guide roller 26, one folding roller 27, one fastener 28, and one first sealer 30 provided close to each other constitute one set, and there are three sets in total. These sets are each provided near the original fabric roll 2. In each set, the folding roller 27, the first sealer 30, the fastener 28, and the guide roller 26 are arranged in a straight line in this order, and the folding roller 27 is rotated from the guide roller 26 to the rotation axis of the rotary disk 22. They are spaced apart in a clockwise direction. The folding roller 27, the first sealer 30, the fastener 28, and the guide roller 26 are arranged in a straight line, which is perpendicular to the radius of the rotary disk 22 outside the center of the rotary disk 22. Further, in the set near the standby roll 2 located at the standby position B, the distance to the pull-out roller 10 is shortest in the order of the folding roller 27, the first sealer 30, the fastener 28, and the guide roller 26. Here, the first sealer 30 is fixed to the rotary disk 22 by attaching one longitudinal end of the first block 36 to the rotary disk 22 .

The first sealer 30 of the set closest to the standby roll 2 located at the standby position B is spaced from the second sealer 31 inward in the radial direction with respect to the central axis of the rotary disk 22 and is disposed opposite to the second sealer 31. Hereinafter, this first sealer 30 will be referred to as a specific first sealer 30, a pair of hoods 42, 41 that cover the specific first sealer 30 will be referred to as a specific pair of hoods 41, 42, and a specific pair of hoods 41, 42. The pair of operating cams 43 and 44 provided respectively in the hoods 41 and 42 and the operating cams 43 and 44 of the specific pair are referred to as a specific pair of operating cams 43 and 44. It is called spring 46.

The transport film 4 pulled out from the supply source roll 2 located at the supply source position A is transferred from the guide roller 26 located between the supply source position A and the standby position B to the specific first sealer 30 and the second sealer 31. It passes through and is spanned over the pull-out roller 10.

The standby film 4 pulled out from the standby roll 2 located at the standby position B is wound around the folding roller 27 of the set closest to the standby roll 2 and is folded back. The standby film 4 is stretched between the folding roller 27 of the set closest to the standby roll 2 and a fastener 28, and the leading end of the standby film 4 is fastened to the fastener 28. Therefore, between the folding roller 27 and the fastener 28 of the set closest to the standby roll 2, the standby film 4 and the conveyance film 4 are overlapped with a slight gap between them. Therefore, when the second sealer 31 is driven radially inward with respect to the central axis of the rotary disk 22 by the actuator 33, the standby film 4 and the conveyance film 4 are sandwiched between the specific first sealer 30 and the second sealer 31. Then, these films 4 are joined.

The replaced film 4 pulled out from the original roll 2 located at the replacement position C is wound around the folding roller 27 of the set closest to the replaced roll 2 and is folded back. The replaced film 4 is spanned between the folding roller 27 of the set closest to the replaced roll 2 and a fastener 28, and the leading end of the replaced film 4 is fastened to the fastener 28.

The splicer configured as described above continuously supplies the transport film 4 from the transport roll 2 to the packaging device. That is, by rotationally driving the pull-out roller 10 by the motor 11, the conveyance film 4 is supplied from the supply source roll 2 to the packaging apparatus. The packaging device is, for example, a pillow packaging machine. The objects to be packaged are sequentially supplied to a packaging device by a feeder, and the packaging device sequentially wraps the objects to be packaged using a conveyor film 4 supplied from a splicer, thereby sequentially producing packages.

After that, when there is only a little remaining transport film 4 wound around the supply source roll 2, the pull-out roller 10 and motor 11 are temporarily stopped, and the second sealer 31 is moved close to the specific first sealer 30. , the transport film 4 and the standby film 4 are sandwiched between the specific first sealer 30 and the second sealer 31. Therefore, the transport film 4 and the standby film 4 are joined by the specific first sealer 30 and the second sealer 31. At this time, since the cam follower 48 enters between the specific pair of operating cams 43, 44, the specific pair of hoods 41, 42 and operating cams 43, 44 open.

Thereafter, the joint is cut by the cutting blade 34. Thereafter, the motor 11 rotates the pull-out roller 10, and the actuator 33 drives the second sealer 31. Therefore, the standby film 4 is pulled out by the pull-out roller 10, and the second sealer 31 is separated from the specific first sealer 30 toward the outside in the radial direction of the rotary disk 22. At this time, since the cam follower 48 comes out from between the specific pair of operating cams 43, 44, the specific pair of hoods 41, 42 and operating cams 43, 44 are closed by the elastic force of the specific leaf spring 46.

Thereafter, when the rotary drive machine 23 drives the rotary disk 22, the rotary disk 22 rotates by 120 degrees. Therefore, the standby roll 2 revolves from the standby position B to the supply source position A, the supply roll 2 revolves from the supply source position A to the exchange position C, and the exchanged roll 2 revolves from the exchange position C to the band position B. Then, the operator can replace the original fabric roll 2 that has been moved to the exchange position C with a new original fabric roll 2. During replacement, the operator's hands do not accidentally touch the high-temperature first sealer 30. This is because the first sealer 30 is covered by the hoods 41 and 42.

<Second embodiment>
FIG. 6 is a front view of the sealing device 1A. In FIG. 6, the same components as those of the sealing device 1 shown in FIG. 1 are given the same reference numerals. Regarding the sealing device 1A, the points that are different from the sealing device 1 will be mainly explained, and the explanation of the points that are the same as the sealing device 1 will be omitted as much as possible.

The sealing device 1A is also called a box motion type end sealing device or a horizontal sealing device, and is installed in a pillow packaging device. This sealing device 1A forms a horizontal seam by periodically sealing a cylindrical film. The cylindrical film is conveyed in a direction perpendicular to the plane of FIG. 6 with its center line perpendicular to the plane of the paper.

The sealing device 1A includes a first sealer 30, a second sealer 31, a drive device 33A, a cutting blade 34, an actuator 35, a first block 36, a second block 37, a first base 38, a second base 39, and a hood 41. , 42 and an opening/closing mechanism 49. The opening/closing mechanism 49 includes operating cams 43, 44, a leaf spring 46, a bracket 47, and a cam follower 48. Here, in FIG. 6, the hood 42 is hidden behind the hood 41, and the operating cam 44 is hidden behind the operating cam 43, so illustrations of the hood 42 and the operating cam 44 are omitted.

The first block 36 and the second block 37 are provided parallel to each other with an interval between them, and both ends of the first block 36 and the second block 37 are respectively connected to the drive device 33A. A first base 38 is attached to the upper surface of the first block 36, and a first sealer 30 is attached to the upper surface of the first base 38. A second base 39 is attached to the lower surface of the second block 37, and a second sealer 31 is attached to the upper surface of the second base 39.

The drive device 33A includes a motor and a motion conversion mechanism (for example, a cam mechanism) that converts the rotational power of the motor into motion of the first sealer 30 and the second sealer 31. As described below, the drive device 33A moves the first sealer 30 and the second sealer 31 along a box motion type locus.

The drive device 33A moves the first sealer 30 and the second sealer 31 at the same speed and in the same direction as the transport speed and direction of the cylindrical film while keeping the first sealer 30 and the second sealer 31 close to each other. . At this time, the cylindrical film is sandwiched between the first sealer 30 and the second sealer 31 to form a horizontal seam.

After that, the drive device 33A moves the first sealer 30 and the second sealer 31 apart from each other, and then moves the first sealer 30 and the second sealer 31 closer to each other. Furthermore, the drive device 33A moves the cylindrical film in the transport direction from immediately after the first sealer 30 and the second sealer 31 separate from each other until immediately before the first sealer 30 and the second sealer 31 sandwich the cylindrical film. moves the first sealer 30 and the second sealer 31 in opposite directions.

As in the first embodiment, a pair of hoods 41 and 42 are attached to the first block 36 so as to be openable and closable. When these hoods 41 and 42 are closed, the first sealer 30 is covered by these hoods 41 and 42. When the hoods 41 and 42 are opened, the first sealer 30 is exposed.

Further, as in the first embodiment, the cam follower 48 is attached to one end of the second base 39 or the second block 37 in the longitudinal direction via the bracket 47, and the actuating cams 43, 44 are attached to the hoods 41, 42. The actuating cams 43 and 44 and the hoods 41 and 42 are respectively attached to one end in the longitudinal direction, and are biased by a leaf spring 36. Therefore, when the first sealer 30 and the second sealer 31 approach each other, the cam follower 48 enters between the operating cams 43, 44, and the operating cams 43, 44 and the hoods 41, 42 open. When the first sealer 30 and the second sealer 31 are separated from each other, the cam follower 48 comes out from between the operating cams 43 and 44, and the operating cams 43 and 44 and the hoods 41 and 42 are closed by the elastic force of the leaf spring 36.

When the sealing device 1A is installed in a horizontal pillow packaging device, the direction in which the first sealer 30 and the second sealer 31 approach and separate from each other is the vertical direction, and when the sealing device 1A is installed in a vertical pillow packaging device , the direction in which the first sealer 30 and the second sealer 31 approach and separate from each other is the horizontal direction.

Note that, like the first sealer 30, the second sealer 31 may be covered by a pair of hoods. In this case, a cam follower is attached to the other longitudinal end of the first base 38 or the first block 36 via a bracket, a pair of operating cams are attached to the other longitudinal ends of the pair of hoods, The actuating cam and the hood are biased by a leaf spring attached to the second block or second base 39.

<Application example>
FIG. 7 is a schematic side view of the horizontal pillow packaging device. This horizontal pillow packaging device 100 is a device that sequentially manufactures packages 106 by sequentially wrapping packages 103 with a film 104.

The pillow packaging device 100 includes a conveyor table 128, a receiving plate 168, a film feeder 110, a bag making device 118, a packaged object feeder 120, a belt conveyor 130, an unloading belt conveyor 135, a center seal device 160, a seal device 1A, and an upper A restraining device 150 and the like are provided.

A receiving plate 168 is provided in front of the conveyance table 128. A slit extending in the front-rear direction is formed in the transport table 128 and the receiving plate 168. A bag making device 118 is provided between the conveyance table 128 and the receiving plate 168.

The packaged article feeder 120 supplies the packaged articles 103 on the conveyor table 128 to the bag making machine 118 at predetermined intervals. The packaged object feeder 120 is a pushing conveyor, and includes a first sprocket 121, a second sprocket (not shown), an endless chain 122, a plurality of pushing members 123, and a motor 124. When the first sprocket 121 is rotationally driven by the motor 124, the endless chain 122 runs. As the endless chain 122 runs, the pushing member 123 moves from the second sprocket toward the first sprocket 121 while passing through the slit in the conveying table 128 and protruding above the conveying table 128. Therefore, the packaged object 103 on the conveyance table 128 is pushed forward by the pushing member 123 from behind and supplied to the bag making device 118.

A raw fabric roll 102 is set above the bag making machine 118. The original fabric roll 102 is a strip-shaped film 104 wound thereon. The film 104 unwound from the original fabric roll 102 is guided to a bag making machine 118 via a feed roller 112 of a film supplying machine 110. When the feed motor 113 rotates the feed roller 112, the film 104 is pulled out from the original roll 102. Thereby, the film 104 is continuously supplied to the bag making machine 118.

When the film 104 supplied by the film feeder 110 passes through the bag making machine 118, both sides 105 (hereinafter referred to as vertical seams 105) of the film 104 are bent downward by the bag making machine 118, and the film is 104 is rolled into a cylindrical shape by a bag making machine 118. By rolling the film 104 into a cylindrical shape, the packaged object 103 supplied to the bag making machine 118 is wrapped in the film 104. The vertical seam 105 is formed into a fin shape so as to overlap and hang down by the bag making device 118, and protrudes below the receiving plate 168 through a slit in the receiving plate 168.

On the downstream side of the bag making device 118, a plurality of packaged items 103 supplied by the packaged item feeder 120 are arranged inside the tubular film 104 at predetermined intervals in the longitudinal direction of the tubular film 104. There is. These items 103 to be packaged are conveyed to the downstream side by following the cylindrical film 104 on a receiving plate 168 and a belt conveyor 130 (to be described later) while maintaining their arrangement.

A center seal device 160 is provided in front of the bag making device 118 and below the receiving plate 168. This center sealing device 160 seals the vertical seam 105 by heating it while sandwiching the vertical seam 105 protruding downward from the slit of the receiving plate 168 from both left and right sides.

A belt conveyor 130 is provided in front of the center seal device 160. In front of the belt conveyor 130, a discharge belt conveyor 135 is provided. The cylindrical film 104 sealed by the center sealing device 160 is conveyed forward by the belt conveyor 130.

An upper holding device 150 is provided above the belt conveyor 130 to hold down the packaged object 103 on the belt conveyor 130 from the outside of the cylindrical film 104.
The cylindrical film 104 and the packaged object 103 that have been conveyed to the front end of the belt conveyor 130 are transferred from the belt conveyor 130 to a discharge belt conveyor 135.

A sealing device 1A shown in FIG. 6 is provided between the belt conveyor 130 and the discharge belt conveyor 135. The cylindrical film 104 is periodically sealed by the sealers 30 and 31 of the sealing device 1A, and is also cut by the cutting blade 34. The timing at which the sealing device 1A seals and cuts the film 104 is from when the object to be packaged 103 passes through the sealing device 1A until when the next object to be packaged 3 passes through the sealing device 1A. In other words, when a portion of the film 104 between adjacent objects to be packaged 103 is transferred from the belt conveyor 130 to the carry-out belt conveyor 135, that portion is sealed by the sealing device 1A and also cut. Thereby, the package 106 is completed. The completed package 106 is conveyed forward by an output belt conveyor 315.

1,1A...Seal device 30...First sealer 31...Second sealer 33...Actuator (drive unit)
33A...Drive device (drive unit)
41, 42... Hood 43, 44... Operating cam 46... Leaf spring 48... Cam follower 49... Opening/closing mechanism

Claims (4)

A first sealer,
a second sealer provided on the opposite side of the first sealer with respect to the film;
a driving unit that drives at least one of the first sealer and the second sealer so that the first sealer and the second sealer move toward and away from each other;
a pair of hoods that cover the first sealer and are openable and closable;
an opening/closing mechanism that opens the pair of hoods as the first sealer and the second sealer approach, and closes the pair of hoods as the first sealer and the second sealer move apart;
The opening/closing mechanism is
a pair of operating cams each provided on the pair of hoods and capable of opening and closing;
It is provided in the second sealer, and enters between the pair of operating cams as the first sealer and the second sealer approach, and as the first sealer and the second sealer move apart, the pair of operating cams A cam follower that goes out of the way,
A sealing device comprising: a biasing portion that biases the pair of hoods and the pair of operating cams in a closing direction. a rotatable supply source shaft that supports a supply source roll around which a strip-shaped first film is wound;
a rotatable standby shaft that supports a standby roll around which a band-shaped second film is wound;
a pull-out roller that pulls out the first film from the supply roll;
a motor that drives the pull-out roller;
a guide roller disposed between the pull-out roller and the supply source shaft and guiding the first film;
a folding roller disposed between the pull-out roller and the guide roller, and folding back the second film from the standby roll toward the guide roller;
a fastener that is disposed between the folding roller and the guide roller and fastens the leading end of the second film folded back by the folding roller;
a first sealer disposed between the folding roller and the fastener;
a second sealer that is provided on the opposite side of the first sealer with respect to the first film and the second film, and that moves toward and away from the first sealer;
a driving unit that drives at least one of the first sealer and the second sealer so that the first sealer and the second sealer move toward and away from each other;
a pair of hoods that cover the first sealer and are openable and closable;
an opening/closing mechanism that opens the pair of hoods as the first sealer and the second sealer approach, and closes the pair of hoods as the first sealer and the second sealer move apart;
The opening/closing mechanism is
a pair of operating cams each provided on the pair of hoods and capable of opening and closing;
It is provided in the second sealer, and enters between the pair of operating cams as the first sealer and the second sealer approach, and as the first sealer and the second sealer move apart, the pair of operating cams A cam follower that goes out of the way,
A splicer comprising: a biasing portion that biases the pair of hoods and the pair of operating cams in a closing direction. A rotary disk and
a pull-out roller provided on the radially outer side of the rotary disk;
a motor that drives the pull-out roller;
a plurality of support shafts that are attached to the rotating disk so as to be arranged in a circumferential direction and each support a raw fabric roll around which a band-shaped film is wound;
a plurality of guide rollers attached to the rotary disk so as to be arranged in a circumferential direction of the rotary disk, and respectively arranged between the support shafts in the circumferential direction of the rotary disk;
a plurality of folding rollers attached to the rotary disk so as to be arranged in a circumferential direction of the rotary disk and disposed on the radially outer side of each of the plurality of support shafts;
a plurality of fasteners attached to the rotary disk so as to be arranged in a circumferential direction of the rotary disk and disposed between each of the plurality of folding rollers and each of the plurality of guide rollers;
a plurality of first sealers attached to the rotary disk so as to be arranged in a circumferential direction of the rotary disk and disposed between each of the plurality of folding rollers and each of the plurality of fasteners;
a plurality of pairs of hoods each covering the plurality of first sealers and being openable and closable;
A splicer comprising: a second sealer provided on the radially outer side of the rotary disk. a cam follower provided on the second sealer;
a driving unit that drives the second sealer and the cam follower together in the radial direction of the rotary disk;
a plurality of pairs of operating cams each provided on the plurality of pairs of hoods and capable of opening and closing;
further comprising a plurality of biasing portions that bias the plurality of pairs of hoods and the plurality of pairs of operating cams in a closing direction, respectively;
In a state in which any one specific first sealer among the plurality of first sealers faces the second sealer in the radial direction of the rotary disk, the driving section moves the second sealer to the inside of the rotary disk in the radial direction. As the cam follower is driven, the cam follower enters between the specific pair of operating cams provided on the specific pair of hoods that cover the specific first sealer among the plurality of pairs of hoods, and As the specific pair of hoods opens and the driving section drives the second sealer and the cam follower radially outward of the rotary disk, the cam follower comes out from between the specific pair of operating cams and 4. The splicer of claim 3, wherein the hoods of a particular pair are closed.

Images