JP2023116339A - Rotary-type seal device - Google Patents

Abstract

To provide a rotary-type seal device configured so that maintenance of a cutting blade can be performed easily in a short time.SOLUTION: A cutting blade 18 for cutting a cylindrical film is supported on an anvil 17 that performs end-sealing to the cylindrical film in cooperation with a hone. The cutting blade 18 is attachably and detachably fixed with a bolt 35 for a blade to a moving member 33 supported in a storage chamber 24a defined internally in a main body 24 of the anvil 17. A lid body 26 blocking an opening 24b of the storage chamber 24a is attachably and detachably fixed with a bolt for a lid to the main body 24. The bolt 35 for a blade is provided at a position which is accessible from the outside, when the lid body 26 is removed from the main body 24 to open the opening 24b.SELECTED DRAWING: Figure 3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary sealing device that seals a tubular packaging material with a pair of sealing bodies rotating in opposite directions and cuts the tubular packaging material.

In a bag-making and filling machine, as a sealing device that sandwiches a tubular film (packaging material) between a pair of sealing bodies and performs end sealing in a direction that intersects the film conveying direction, a predetermined A rotary sealing device that engages at a rotational angle of , and the position of engagement does not move in the film conveying direction, and a pair of sealing bodies that move toward and away from each other to sandwich the tubular film. A so-called box motion sealing device that moves in the conveying direction is known. Box-motion type sealing devices tend to shake and vibrate because the heavy parts including the sealing body move up and down and back and forth when end sealing is applied. The upper limit of packaging capacity for sealing action is constrained. On the other hand, a rotary sealing device has a high processing capacity per minute and is suitably used for packaging requiring high speed.

The sealing device is provided with cutting means for cutting the tubular film in a direction crossing the film conveying direction at the sealing portion by the sealing body. As a cutting means in the rotary sealing device, a contact blade provided on one sealing body is brought into contact with a receiving blade provided on the other sealing body with the tubular film sandwiched therebetween, thereby cutting the film. A "hit-cut" type of cutting means is commonly employed. However, in a sealing device that employs a "cutting" type cutting means, it is necessary to adjust the degree of contact of the cutting edge against the receiving edge, in addition to adjusting the seal meshes formed on the sealing surface of the sealing body. There is a problem that the adjustment work is complicated and takes time. In view of this, a rotary sealing device that employs a so-called "cut-off" type cutting means that does not require adjustment of the degree of contact between the receiving blade and the contact blade has been proposed, for example, in Patent Document 1. In the seal device of Patent Document 1, a seal body is disposed on each of a pair of rotating shafts that rotate in mutually opposite directions, and at the timing when the seal surfaces of the pair of seal bodies mesh with each other, the inside of one of the seal bodies is By protruding the cutting blade housed in the sealing surface from the sealing surface, the tubular film sandwiched between the sealing surfaces is cut.

Japanese Patent Publication No. 55-29862

The cutting blade provided in the sealing device wears over time and becomes unable to cut the tubular film satisfactorily. It is necessary to carry out regular maintenance such as polishing. In the sealing device disclosed in Patent Document 1, a cutting blade accommodated in the inner space of a sealing body is connected to a link mechanism such as a cam that is linked to a drive source through the inside of a rotating shaft, and the cutting blade is connected to the sealing surface by the link mechanism. In order to remove the cutting blade from the seal body, complicated disassembly work such as removing the rotating shaft from the device main body and removing the seal body from the rotating shaft is required. Also, the assembling work after maintenance is complicated, and the maintenance of the cutting blade is very complicated and takes a long time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotary sealing device that allows easy maintenance of a cutting blade in a short period of time.

The rotary seal device of the invention according to claim 1 of the present application is
A pair of sealing bodies (16, 17) rotating in mutually opposite directions across the conveying path of the tubular packaging material (10) is provided, and sealing surfaces (23b, 25b) of the pair of sealing bodies (16, 17) are provided. In a rotary sealing device that sandwiches a tubular packaging material (10) with and performs end sealing in a direction that intersects the packaging material conveying direction,
A moving member (24a) provided in one of the pair of sealing bodies (16, 17), and reciprocated in the radial direction by reciprocating means (36). 33) and
It is detachably fixed to the moving member (33) by a first fixing means (35), and protrudes from the sealing surface (25b) of the one sealing body (17) as the moving member (33) moves. a cutting blade (18) for cutting the tubular packaging material (10) sandwiched between the sealing surface (25b) and the sealing surface (23b) of the other sealing body (16);
It is detachably fixed to one of the seal bodies (17) by a second fixing means (27), and has an opening (24a) that opens the storage chamber (24a) in a direction intersecting the reciprocating direction of the moving member (33). a lid (26) that closes 24b),
The first fixing means (35) is provided at a position exposed by removing the lid (26) from the one seal (17).
According to the first aspect of the invention, the first fixing means for fixing the cutting blade to the moving member can be accessed simply by removing the lid from the sealing body. Maintenance can be easily performed in a short time.

In the invention according to claim 2, one of the sealing bodies (17) having the cutting blade (18) is the anvil (17), and the other sealing body (16) is ultrasonically vibrated by the vibration generating means (20). The tubular packaging material (10) sandwiched between the anvil (17) and the horn (16) is end-sealed by ultrasonic vibration.
According to the second aspect of the invention, since the cylindrical packaging material is end-sealed by the ultrasonic vibration, the anvil and the cutting blade provided on the anvil do not become hot, and the anvil and the cutting blade are cooled. Maintenance can be done in a shorter time without waiting for

In the invention according to claim 3, the pair of seal bodies (16, 17) are positioned vertically across the conveying path so that one of the seal bodies (17) is positioned below the conveying path,
An arc-shaped support member (17) that allows the sealing surface (25b) of the tubular packaging material (10) to hold the tubular packaging material (10) and supports the tubular packaging material (10) from below. 32) is provided.
According to the third aspect of the invention, the end-sealed and cut product can be guided downstream without any trouble.

The invention according to claim 4 is characterized in that the moving member and the cutting blade are positioned by a fitting structure.
According to the fourth aspect of the invention, it is possible to easily position and fix the cutting blade at an appropriate position with respect to the moving member.

According to the present invention, the cutting blade can be easily replaced in a short time.

It is a schematic front view showing an end seal device. FIG. 3 is a schematic cross-sectional view of a main part of the end seal device; It is a schematic front view showing the anvil with the lid removed. It is a principal part schematic sectional drawing of an anvil, (a) shows the state where the cutting blade was attached, and (b) shows the state where the cutting blade was removed. (a) is a schematic diagram showing a state in which the moving member and the assembly jig and the body and the seal member are removed, and (b) is a schematic diagram showing a state in which the movement member and the assembly jig and the body and the seal member are fixed. It is a diagram. FIG. 4 is a schematic cross-sectional view of essential parts showing a state in which the restricting portion of the assembly jig fixed to the moving member is inserted into the concave groove of the horn;

Next, preferred embodiments of the rotary sealing device according to the present invention will be described below with reference to the accompanying drawings. In the embodiment, a case where the rotary sealing device is adopted as an end sealing device of a horizontal bag making and filling machine will be described.

A horizontal form-fill-fill-seal machine (packaging machine) forms a tubular film (tubular packaging material) 10 by polymerizing a band-shaped film (packaging material) pulled out from a raw fabric roll so that both edges in the longitudinal direction are joined together. a supply conveyor for supplying the articles 11 toward the tubular film 10 at predetermined intervals; a center sealing device for applying a center seal to the overlapped portion of the tubular film 10 overlapped in a palm-to-palm shape; A film conveying means for holding the overlapped portion of the tubular film 10 and conveying the tubular film 10 toward the center sealing device, and a tubular film at the front and rear positions of the articles 11 supplied into the tubular film at predetermined intervals. 10, and an end sealing device for performing end sealing and cutting in a direction (width direction) intersecting the film conveying direction. In addition, the horizontal bag making and filling machine has a conveying conveyor 12 for supporting the article 11 from below via the tubular film 10 and conveying it downstream, and an unloading conveyor 13 before and after the film conveying direction of the end sealing device. A product (pillow-packed product) separated from the tubular film 10 on the upstream side by end sealing/cutting is carried out to the next process by the carry-out conveyor 13 (see FIG. 2).

As shown in FIGS. 1 and 2, the end sealing device has a pair of rotating shafts 14 and 15 rotating in opposite directions across the conveying path of the tubular film 10. A horn (the other seal body) 16 arranged on the shaft 14, an anvil (the one seal body) 17 arranged on the other rotating shaft (second rotating shaft) 15, and an anvil 17 arranged on the A cutting means 19 having a cutting blade 18 for cutting the tubular film 10 by cutting, and a vibration generating means 20 arranged on the first rotating shaft 14 are provided. The vibration generating means 20 includes a converter that generates ultrasonic waves, a booster that amplifies the ultrasonic waves, and the like, and is configured to ultrasonically vibrate the horn 16 with a predetermined amplitude. The cylindrical film 10 is sandwiched between the horn 16 and the anvil 17 at a predetermined pressure, and end-sealed in the width direction by ultrasonic vibration. The pair of rotating shafts 14, 15 are rotatably supported by a pair of support members 21, 21 spaced apart in the width direction, and are arranged upwardly across the transport path between the pair of support members 21, 21 in the embodiment. A horn 16 is arranged and an anvil 17 is arranged on the lower side. Further, the second rotating shaft 15 on which the anvil 17 is arranged has a shaft portion 15a extending from one end in the width direction of the main body 24 described later of the anvil 17. A drive motor such as a servomotor (not shown) is connected to a gear mechanism or the like. Linked via a transmission mechanism 22 such as a chain-sprocket mechanism, the horn 16 and the anvil 17 are rotationally driven in opposite directions by a drive motor.

As shown in FIGS. 1 and 2, the horn 16 is provided with a plurality of seal portions 23 (two at 180° intervals in the embodiment) extending radially and spaced apart in the rotational direction. Further, the seal portion 23 is formed with a groove 23a that is radially recessed from the outer peripheral surface so as to extend in the width direction. 23b is formed to extend linearly in the width direction.

As shown in FIGS. 1 to 3, the anvil 17 is housed in a main body 24 which is arranged on the second rotating shaft 15 and rotates integrally, and a housing chamber 24a defined inside the main body 24 so as to rotate radially. and a sealing member 25 detachably fixed to the outer peripheral surface (outer surface) of the main body 24 corresponding to the moving direction of the cutting means 19 and forming a pair with each sealing portion 23 of the horn 16. and a lid body 26 that is detachably fixed to the main body 24 and closes the opening 24b of the storage chamber 24a. The main body 24 has an arrangement surface (abutment surface, outer surface) 24c of each seal member 25 formed in an arc shape (arc shape) centering on the rotation axis of the anvil 17, and both the arrangement surfaces 24c, 24c. The outer peripheral portion deviated from is formed to be a flat surface along the moving direction of the cutting means 19, and an opening 24b that opens the storage chamber 24a to the outside is formed in the flat surface, and the lid 26 is detachable. Fixed. The lid 26 is attached to the main body by screwing a lid bolt (second fixing means) 27 such as a hexagon socket bolt inserted through a through hole formed in the lid 26 into a screw hole formed in the main body 24 . 24. By removing the lid bolt 27, the lid 26 is removed from the main body 24 to open the opening 24b so that the storage chamber 24a can be accessed from the outside. In the embodiment, each of the widthwise side portions of the substantially rectangular lid body 26 is configured to be bolted to the main body 24 at two locations, a total of four locations. In the main body 24, through-holes 28 penetrating in the radial direction through which the cutting blades 18 of the cutting means 19 can pass are formed with a predetermined length in the width direction corresponding to the positions where the seal members 25 are arranged. ing.

As shown in FIGS. 1 to 4, the sealing member 25 is a block-shaped member extending a predetermined length in the width direction. A sealing bolt (third fixing means) 30 such as a hexagon socket head bolt inserted through the through hole 29a is screwed into a screw hole 31 formed in the main body 24, thereby positioning and fixing the main body 24. As shown in FIG. The bottom surface (abutment surface) of the seal member 25 facing the mounting surface 24c of the main body 24 is formed in an arc shape corresponding to the mounting surface 24c. In the seal member 25, a long hole 25a is formed at a position corresponding to the through hole 28 of the main body 24 and penetrates in the radial direction through which the cutting blade 18 can pass. Second seal surfaces 25b, 25b paired with the first seal surfaces 23b, 23b of the horn 16 are formed on both front and rear sides of the anvil 17 in the rotational direction so as to extend in the width direction. Then, the horn 16 and the anvil 17 are rotated with respect to the tubular film 10 being conveyed, and the tubular film 10 is sealed on both front and rear sides of the article 11 which is supplied into the tubular film 10 at predetermined intervals. It is sandwiched between the surfaces 23b and 25b at a predetermined pressure, and the ultrasonic vibration emitted from the horn 16 is transmitted to the sandwiching portion to melt the heat-sealed film, intersect the conveying direction of the tubular film 10, and seal the end seal. part is formed. In addition, the second sealing surfaces 25b, 25b are formed with seal lines of a predetermined shape that form unevenness in the end seal portion.

As shown in FIG. 2, the main body 24 of the anvil 17 supports from below the tubular film 10 conveyed along the conveying path, and also holds the article 11 fed into the tubular film 10 into the tubular film. A support member 32 that can be supported from below via 10 is detachably arranged. The support member 32 is formed in an arc shape (arcuate shape) corresponding to the rotation radius of the anvil 17 so as to extend in the rotation direction of the anvil 17 on the outer circumference excluding the arc-shaped installation surface 24c on which the seal member 25 is arranged. formed. That is, the support member 32 allows the tubular film 10 to be sandwiched between the first sealing surface 23b and the second sealing surface 25b and allows the cutting blade 18 to protrude from the second sealing surface 25b. The tubular film 10 and the article 11 in the tubular film 10 can be supported from below and guided downstream without hindrance. In the embodiment, a support member 32 is arranged so as to cover the lid body 26, so that even when the anvil 17 is rotated so that the side where the lid body 26 is arranged faces upward, the conveying level of the article 11 can be greatly changed. The article 11 can be supported by the support material 32 without any force.

As shown in FIGS. 2 and 3, the cutting means 19 corresponds to a moving member 33 which is supported in the housing chamber 24a of the anvil 17 and is reciprocally movable in the radial direction, and each sealing member 25 of the moving member 33. The cutting means 19 moves the cutting blades 18, 18 through the corresponding through hole 28 and elongated hole 25a by reciprocating movement of the moving member 33 so as to pass through the second seal. It is configured to protrude from the surface 25b and cut the tubular film 10 . The cutting blade 18 is a plate-shaped member having a predetermined thickness, and is provided with an attachment portion 18b on the side of the rotation center of the anvil 17, and a cutting edge portion 18a formed with a blade at the end spaced from the rotation center of the anvil 17. are connected to the attachment portion 18b. Further, the moving member 33 is formed with receiving portions (mounting portions) 34 recessed from one side in the thickness direction in a shape corresponding to the mounting portion 18b of the cutting blade 18 at both end portions in the reciprocating direction. The cutting blade 18 is positioned with respect to the moving member 33 by fitting the attachment portion 18 b into the receiving portion 34 . In the cutting blade 18, a blade bolt (first fixing means) 35 such as a hexagon socket head bolt inserted through a through hole 18c formed in the mounting portion 18b is formed in the receiving portion 34 of the moving member 33. It is positioned and fixed by screwing it into the screw hole 34a. In the embodiment, the cutting blade 18 is attached to the moving member 33 by the fitting structure between the receiving portion 34 and the attaching portion 18b, so that the through hole 18c of the attaching portion 18b and the screw hole 34a of the moving member 33 are connected. The cutting blade 18 is positioned so that the are aligned. In the embodiment, the cutting blade 18 is fixed without tilting to the moving member 33 by a plurality (two) of blade bolts 35 spaced apart in the width direction. The facing surfaces of the mounting portion 18b of the cutting blade 18 and the receiving portion 34 are flat surfaces. The center in the thickness direction is substantially aligned with the center in the width direction of the through-hole 28 and configured to be able to move within the through-hole 28 without contacting the main body 24 .

As shown in FIG. 3, the blade bolt 35 is positioned to face the opening 24b of the housing chamber 24a, and the blade bolt 35 is exposed to the outside by removing the lid 26 from the main body 24. configured as follows. In this embodiment, the cutting blade 18 can be removed from the main body 24 in the radial direction through the through hole 28 and the long hole 25a by removing the blade bolt 35 to release the fixing of the cutting blade 18 to the moving member 33. (See FIG. 4).

The cutting means 19 is linked to reciprocating means 36 for reciprocating the cutting means 19 in the radial direction. As shown in FIGS. 1 and 3, the reciprocating means 36 includes a link mechanism 37 supported in the accommodation chamber 24a and linked to the moving member 33, an operating mechanism 38 for operating the link mechanism 37, and the and a drive motor 39 such as a servo motor as drive means for driving the operating mechanism 38 . A shaft portion 15b on the opposite side of the shaft portion 15a of the main body 24 to which the transmission mechanism 22 of the main body 24 is connected in the second rotating shaft 15 is configured as a hollow shaft. An operating shaft is linked to the link mechanism 37 . When the drive motor 39 operates the link mechanism 37 via the operating shaft of the operating mechanism 38 , the moving member 33 with which the link mechanism 37 is linked reciprocates in the radial direction of the anvil 17 . The cutting means 19 is configured so that none of the cutting blades 18, 18 protrude from the second sealing surfaces 25b, 25b at an intermediate position in the reciprocating direction of the moving member 33, and one cutting blade 18 corresponds When protruding from the second sealing surface 25b, the other cutting blade 18 is configured to retract toward the through hole 28 from the corresponding long hole 25a of the sealing member 25 .

The reciprocating means 36 interlocks with the rotation of the horn 16 and the anvil 17, and at the timing when the tubular film 10 is sandwiched between the first sealing surface 23b and the second sealing surface 25b, the reciprocating means 36 moves from the second sealing surface 25b. It is configured to move the moving member 33 so as to protrude the cutting edge portion 18 a of the cutting blade 18 . The reciprocating means 36 also operates in conjunction with the manual rotation of the anvil 17 while the packaging machine is stopped, so that the cutting blade 18 moves toward the second sealing surface at the same timing as when the packaging machine is in operation. The moving member 33 is moved so as to protrude from 25b.

The end seal device of the embodiment is constructed such that the sealing member 25 can be positioned and fixed to the main body 24 of the anvil 17 by an assembly jig 40 attached to the moving member 33 in place of the cutting blade 18. Therefore, the assembly jig 40 will be described.

As shown in FIGS. 5 and 6, the assembly jig 40 includes an attachment portion 40a that is positioned by being fitted into the receiving portion 34 of the moving member 33, and a limiter that is connected to the attachment portion 40a. The width and height (the length in the reciprocating direction of the moving member 33) of the attachment portion 40a are set to be the same as those of the attachment portion 18b of the cutting blade 18. It is Further, the attaching portion 40a is formed with a through hole 40c corresponding to the screw hole 34a formed in the receiving portion 34, and the assembly jig 40 can be positioned and fixed to the moving member 33 by the blade bolt 35. configured to The restricting portion 40b has a width larger than that of the attachment portion 40a, and is set to a size that allows it to pass through the through hole 28 of the main body 24 and the elongated hole 25a of the sealing member 25. As shown in FIG. Further, the height of the restricting portion 40b is set to be substantially the same as the height of the cutting edge portion 18a of the cutting blade 18, and by moving the moving member 33 to which the assembly jig 40 is fixed in the radial direction, the restricting portion 40b can be restricted. Like the cutting blade 18, the tip of the portion 40b is configured to protrude to a position where it can be inserted into the concave groove 23a of the horn 16. As shown in FIG. Further, the tip portion of the restricting portion 40b is formed so as to protrude in an arc shape in the rotation direction of the anvil 17. As shown in FIG.

The thickness of the restricting portion 40b is greater than the thickness of the cutting edge portion 18a of the cutting blade 18, and the seal member 25 is inserted along the longitudinal direction (width direction) of the long hole 25a of the sealing member 25 over a predetermined length. , is set to a dimension capable of restricting the movement of the seal member 25 in the rotational direction of the anvil 17 within a predetermined range. The predetermined range for restricting the movement of the seal member 25 in the rotational direction consists of the second seal surfaces 25b, 25b located in front and behind in the rotational direction across the long hole 25a and the corresponding first seal surface 23b of the horn 16. , 23b is set to be equal to or less than the permissible amount for sandwiching the tubular film 10 and forming an appropriate seal line at the end seal portion. Further, in a state in which the mounting portion 40a of the assembly jig 40 is fitted into the receiving portion 34 of the moving member 33 and fixed with bolts, the center of the restricting portion 40b in the thickness direction is approximately aligned with the center of the through hole 28 in the width direction. configured to align. In the embodiment, the width of the elongated hole 25a in the transverse direction intersecting with the extending direction is set to 4 mm, whereas the thickness of the restricting portion 40b is set to 3.7 to 3.8 mm, so that the elongated hole 25a The forward and backward movement amount of the sealing member 25 in the rotational direction with the restricting portion 40b inserted therein is configured to be restricted to 0.15 mm or less. That is, when the restricting portion 40b is inserted into the long hole 25a, there is only a very small gap between the restricting portion 40b and the inner wall of the elongated hole 25a. 17 is configured to substantially restrict movement in the rotational direction. The assembly jig 40 can be removed from the main body 24 in the radial direction through the through hole 28 of the main body 24 and the elongated hole 25a of the seal member 25 by removing the blade bolt 35 to release the fixation. configured to allow

Next, the operation of the end seal device according to the embodiment will be described.
In the horizontal bag making and filling machine, the horn 16 and the horn 16 positioned between the support members 21 and 21 are arranged above the conveying conveyor 12 and the unloading conveyor 13 arranged in front and behind in the film conveying direction with the end sealing device interposed therebetween. There is a space accessible to the anvil 17 by the operator from the front or back in the film transport direction. Therefore, when maintenance such as replacement of the cutting blade 18 is to be performed, the anvil 17 is rotated while the lid body 26 is arranged, while the packaging machine is stopped. Orient to the front side or rear side of the film transport direction accessible from outside the sealing device. After removing the support member 32 from the main body 24 of the anvil 17, the plurality of lid bolts 27 fixing the lid 26 to the main body 24 are removed, and the lid 26 is removed from the main body 24.例文帳に追加By removing the lid 26 from the main body 24, the opening 24b of the housing chamber 24a is opened to the outside, and the cutting blade 18 of the cutting means 19 is fixed to the moving member 33, as shown in FIGS. The blade bolt 35, which is held in place, is exposed through the opening 24b. By removing the blade bolt 35, the fixing of the cutting blade 18 to the moving member 33 is released. Therefore, as shown in FIG. It can be removed from the main body 24 through the long hole 25a. When removing the blade bolt 35, the anvil 17 should be placed in such a position that the through hole 28 of the main body 24 and the long hole 25a of the seal member 25 face forward and backward in the conveying direction (the cutting blade 18 enters and exits the long hole 25a). By adopting a posture in which the direction is substantially parallel to the conveying direction, the cutting blade 18 can be pulled out and removed from the long hole 25a without dropping. As a result, the cutting blade 18 can be replaced, and the cutting edge of the cutting blade 18 can be ground externally.

The operation of assembling a new cutting blade 18 or a cutting blade 18 whose cutting edge has been ground to the anvil 17 can be performed by reversing the procedure for removing. That is, the cutting blade 18 is passed through the long hole 25a of the second seal member 25 and the through hole 28 of the main body 24 from the mounting portion 18b side, and the mounting portion 18b is fitted into the receiving portion 34 of the moving member 33. . After fixing the cutting blade 18 to the moving member 33 with the blade bolt 35 , the lid 26 is fixed to the main body 24 with the lid bolt 27 , and the support member 32 is arranged on the main body 24 . The cutting blade 18 is positioned with respect to the moving member 33 so that the through hole 18c of the attaching portion 18b and the screw hole 34a of the moving member 33 are aligned due to the fitting structure between the receiving portion 34 and the attaching portion 18b. Therefore, the cutting blade 18 can be easily fixed to the moving member 33 at an appropriate position without delaying the work of fixing the blade bolt 35 .

In the end seal device of the embodiment, by simply removing the cover 26 of the anvil 17 from the main body 24, external force is applied to the blade bolt 35 that secures the cutting blade 18 and the moving member 33 housed in the housing chamber 24a. The accessibility makes maintenance of the cutting blade 18 very easy and can save working time. In the sealing method using ultrasonic vibration, the anvil 17 and the cutting blade 18 do not reach a high temperature. There is no need to wait for the temperature to drop to an unacceptable temperature, and maintenance can be started immediately after stopping the packaging machine, further shortening the working time. In addition, since the main body 24 of the anvil 17 is provided with a supporting member 32 capable of supporting the article 11 from below through the tubular film 10 so as to cover the lid 26, the lid 26 is Even if the end-sealed and cut product is positioned upward, the end-sealed and cut product can be guided downstream without hindrance. In the sealing method using ultrasonic vibration, if the cutting blade 18 and the support member 32 are arranged on the horn 16 that is ultrasonically vibrated, there is a possibility that troubles related to the ultrasonic vibration may occur. Since the anvil 17 is arranged on the side, and the cutting blade 18 and the support member 32 are arranged on the anvil 17, the tubular film 10 can be cut and the article 11 can be sent to the downstream side without causing problems related to ultrasonic vibration. can be well guided.

Next, the operation of replacing the seal member 25 will be described.
When replacing the seal member 25, as shown in FIG. 5(a), the plurality of sealing bolts 30 fixing the seal member 25 to the main body 24 are removed, and the seal member 25 is removed from the main body 24. As described above, the lid 26 is removed from the main body 24, and the blade bolt 35 fixing the cutting blade 18 to the moving member 33 is exposed through the opening 24b (see FIG. 3). The blade bolt 35 is removed to remove the cutting blade 18 from the moving member 33. Instead, the assembly jig 40 is passed through the through hole 28 of the main body 24 from the attachment portion 40a side, and the attachment portion 40a is removed. After being fitted and positioned in the receiving portion 34 of the moving member 33, the mounting portion 40a is positioned and fixed to the receiving portion 34 by the blade bolt 35 (see FIG. 5(b)). By manually rotating the anvil 17, the moving member 33 to which the assembly jig 40 is fixed is moved in the radial direction via the reciprocating means 36, and the restricting portion 40b is moved to the installation surface 24c of the main body 24. The sealing member 25 is arranged on the installation surface 24c by inserting the restricting portion 40b into the elongated hole 25a.

By manually rotating the anvil 17, the concave groove 23a of the seal portion 23 of the horn 16 and the long hole 25a of the seal member 25 arranged on the installation surface 24c of the main body 24 via the assembly jig 40 are formed. As the moving member 33 moves radially in conjunction with the rotation of the anvil 17, the limiting portion 40b of the assembly jig 40 protrudes from the second sealing surface 25b of the sealing member 25. do. Then, the sealing member 25 is attached to the main body 24 with the sealing bolt 30 at a position where the tip of the restricting portion 40b protruding from the second sealing surface 25b is inserted (reached) into the concave groove 23a of the sealing portion 23. position and fix. The attachment jig 40 is released from the moving member 33 by removing the blade bolt 35, and the attachment jig 40 is removed from the main body 24 through the through hole 28 of the main body 24 and the long hole 25a of the seal member 25. remove. By positioning and fixing (attaching) the cutting blade 18 to the moving member 33 via the mounting portion 18b instead of the assembly jig 40, the long hole 25a of the seal member 25 and the horn 16 in the cutting blade 18 The positional relationship with the concave groove 23a is in a proper state. When the blade bolt 35 is removed, the anvil 17 is placed in a position in which the through hole 28 of the main body 24 and the elongated hole 25a of the seal member 25 face forward and backward in the conveying direction, as in the case of removing the cutting blade 18. By doing so, the mounting jig 40 can be pulled out and removed from the elongated hole 25a without dropping.

In the end seal device of the embodiment, the long hole 25a is inserted into the restricting portion 40b of the assembly jig 40 which is fixed via the mounting portion 40a to the receiving portion 34 for positioning the cutting blade 18 on the moving member 33. Since the sealing member 25 can be fixed to the main body 24 of the anvil 17 by using the assembling jig 40, if the cutting blade 18 is fixed to the moving member 33 from which the assembly jig 40 is removed, the long hole of the cutting blade 18 and the sealing member 25 can be fixed. 25a and 25a, it is possible to prevent damage due to contact between the cutting blade 18 and the seal member 25 during operation of the end seal device. Further, since the fixing position of the sealing member 25 is mechanically determined by simply inserting the long hole 25a of the sealing member 25 into the restricting portion 40b of the assembly jig 40, the sealing member 25 can be fixed regardless of the operator's skill level. It can be assembled at an appropriate position with high accuracy in a short time. Further, by fixing the sealing member 25 to the main body 24 of the anvil 17 in a state in which the restricting portion 40b of the assembly jig 40 is inserted into the groove 23a of the horn 16, the position of the groove 23a and the cutting blade 18 can be adjusted. The relationship can also be properly adjusted to prevent contact damage between the cutting blade 18 and the horn 16 . Furthermore, it is possible to limit the positional deviation of the first sealing surface 23b and the second sealing surface 25b, which are located in front and behind the groove 23a and the long hole 25a in the rotational direction, and to provide an appropriate end seal for the tubular film 10. can apply.

Since the mounting surface 24c of the main body 24 of the anvil 17 and the bottom surface of the sealing member 25 are formed in corresponding arcs, the sealing member 25 is attached to the main body 24 so that the bottom surface abuts the mounting surface 24c. The seal member 25 can be easily positioned along the rotation axis direction of the anvil 17 simply by arranging it. Further, since the end portion of the restricting portion 40b of the assembly jig 40 is formed in an arc shape in the rotation direction of the anvil 17, the end seal device may be operated by mistake while the assembly jig 40 is fixed to the moving member 33. Even so, the restricting portion 40b can be prevented from coming into contact with the horn 16. FIG. Also, when handling the assembly jig 40, it is safe to touch the tip of the restricting portion 40b.

(Change example)
The present invention is not limited to the configuration of the embodiment, and can be modified, for example, as follows. In addition, without being limited to the following modified examples, various embodiments can be adopted for the configurations described in the examples within the scope of the present invention.
(1) The number of sealing members 25 provided on the anvil 17 is not limited to two, and one may be provided. It is sufficient if it corresponds to the number of members 25 arranged.
(2) The support member 32 may be provided integrally with the cover 26. In this structure, notches or through holes are provided at positions corresponding to the cover bolts 27 of the support member 32, or support is provided. By providing the member 32 only at a position away from the lid bolt 27, the lid bolt 27 may be configured to be accessible from the outside.
(3) A configuration in which the anvil 17 is arranged on the upper side of the conveying path and the horn 16 is arranged on the lower side can be adopted.
(4) The fixing means for fixing the cutting blade 18 and the lid body 26 is not limited to the structure in which tools such as bolts 35 and 27 and screws are used for attachment and detachment. Various known means such as various possible locking mechanisms can be employed.
(5) The end sealing device may be of a heat sealing type in which a heat source such as a heater is arranged in the sealing body.
(6) The packaging material is not limited to a synthetic resin film, and may be a composite packaging material in which heat-fusible films are layered on a paper substrate.
(7) It can be used as an end seal device for vertical bag making and filling machines.

10 tubular film (tubular packaging material), 11 article, 16 horn (other sealing body)
17 anvil (one sealing body), 18 cutting blade, 20 vibration generating means 23b first sealing surface (sealing surface), 24a housing chamber, 24b opening 25b second sealing surface (sealing surface), 26 lid, 27 for lid Bolt (second fixing means)
32 support member, 33 moving member, 35 blade bolt (first fixing means), 36 reciprocating means

Claims (4)

A pair of seal bodies that rotate in opposite directions across the conveying path of the tubular packaging material are provided, and the tubular packaging material is sandwiched between the seal surfaces of the pair of seal bodies, and the tubular packaging material is rotated in a direction intersecting the conveying direction of the packaging material. In a rotary seal device that applies end seals,
a moving member supported in a housing chamber provided in one of the pair of sealing bodies and reciprocated in a radial direction by reciprocating means;
It is detachably fixed to the moving member by a first fixing means, protrudes from the sealing surface of the one sealing body as the moving member moves, and is sandwiched between the sealing surface and the sealing surface of the other sealing body. a cutting blade for cutting the cylindrical packaging material,
a lid body that is detachably fixed to the one seal body by a second fixing means and closes an opening that opens the storage chamber in a direction that intersects the reciprocating direction of the moving member;
A rotary sealing device, wherein the first fixing means is provided at a position exposed by removing the lid from the one sealing body. One of the sealing bodies provided with the cutting blade is an anvil, and the other sealing body is configured as a horn that vibrates ultrasonically by a vibration generating means, and ultrasonic vibration is applied to the tubular packaging material sandwiched between the anvil and the horn. 2. The rotary seal device according to claim 1, wherein end seals are provided. the pair of seal bodies are vertically positioned across the transport path such that one of the seal bodies is positioned below the transport path;
3. An arc-shaped support member is provided in said one sealing member to allow the sealing surface of said cylindrical packaging material to be sandwiched and to support said cylindrical packaging material from below. A rotary sealing device as described. The rotary sealing device according to any one of claims 1 to 3, wherein the moving member and the cutting blade are positioned by a fitting structure.

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