JP2022029316A - Bag-making filling and packaging machine - Google Patents

Abstract

To provide a bag-making filling and packaging machine which is advantageous for securing a short cycle time while securing a drawing range.SOLUTION: As soon as a pair of lateral sealers 40 reach positions corresponding to top dead points of crank mechanisms, stop operation of stopping a motor for driving crank mechanisms only for a prescribed time is executed, and closing operation for drawing of moving the pair of lateral sealers 40 to drawing positions of enabling drawing operation of a cylindrical film F (packaging film) by drawing members 28, and stopping the drawing is executed while duplicating at the same time with the stop operation.SELECTED DRAWING: Figure 4

Description

The present invention relates to a bag-making filling and packaging machine.

The bag-making filling and packaging machine includes a filling cylinder unit including a filling cylinder and a former, and an apparatus main body including a film supply mechanism, a film feeding mechanism, a vertical joint portion, and a horizontal joint portion (see Patent Document 1). ).
Products measured by a weighing machine are intermittently loaded into the hopper at the top of the filling cylinder.
The packaging film supplied to the former from the film supply mechanism is bent into a tubular shape on the outer peripheral surface of the filling cylinder by the former, and is intermittently transferred downward on the outer peripheral surface of the filling cylinder by the film feeding mechanism.
Then, both ends in the width direction of the packaging film bent into a tubular shape are joined by the vertical joint portion to form a tubular film, and the longitudinal end portions of the tubular film are joined and cut by the horizontal joint portion to form a filling cylinder. A bag body containing the product introduced from is manufactured.
In the vertical joint portion, a pair of elongated sealing portions in the longitudinal direction of the tubular film are reciprocated linearly in a direction in which they are separated and approach each other in the width direction of the tubular film.
Further, in the transverse joining portion, at the end portion in the longitudinal direction of the tubular film, a pair of elongated sealing portions in the width direction of the tubular film reciprocate in a direction orthogonal to each other in a direction orthogonal to the width direction of the tubular film. It is linearly moved.
That is, the lower part of the tubular film in the length direction is sealed at a predetermined position, and the product weighed from the product loading hopper is sealed from the filling cylinder body via the hopper. It is thrown inside the film.
After that, the tubular film is transferred from a predetermined position to a position below it by the film feed mechanism.
At the lower position, the upper part of the tubular film into which the product is loaded is sealed by the horizontal sealing device to form a bag containing the product, and the lower part of the tubular film located above it is sealed, and at the same time. , The bag containing the product is separated from the tubular film.
In this way, a bag body containing the product is formed by the bag-making filling and packaging machine.

By the way, when the product to be enclosed in the bag is lightweight and has a large air resistance such as potato chips and snack foods, the products put into the tubular film from the hopper have a gap inside the bag-shaped film. Since the products and their fragments are stacked in a state of being vacant and bulky, the products and their fragments may be located near the planned sealing location on the upper part of the tubular film.
If the planned sealing portion is sealed in this state, the product or a fragment thereof may be caught in the sealing portion of the tubular film, resulting in a sealing failure.
Therefore, an ironing member is provided in the pair of sealing portions, and before sealing the tubular film with the pair of sealing portions, the pair of sealing portions are moved in the approaching direction to position the pair of ironing members in the ironing position. By sandwiching the upper part of the tubular film and then moving the pair of sealing parts downward, the tubular film is squeezed from the top to the bottom with a pair of ironing members, and the products and fragments in the tubular film are forcibly sealed. A squeezing operation is performed to move the film downward from the planned location, and the product inside the tubular film is squeezed.

Japanese Unexamined Patent Publication No. 2019-43626

By the way, it is advantageous to perform such a squeezing operation in a wide range from the upper part of the tubular film as much as possible in order to surely move the product and its fragments in the tubular film downward.
In that case, after the pair of sealing portions are set to open positions separated from the tubular film, the pair of sealing portions (ironing members) are raised to the ironing start position, which is the starting position of the ironing range, and then the pair of sealing portions are moved. It suffices to move (move) the pair of seals from the open position to the ironing position, and then move the pair of seals downward from the ironing start position.
However, when the operation of raising the pair of seal portions and the operation of bringing the pair of seal portions close to each other in time are separated in this way, one bag body in which the product is enclosed is formed by the bag-making filling and packaging machine. Therefore, the time required for this (hereinafter referred to as cycle time) becomes long, which is disadvantageous in improving the productivity of the bag-making filling and packaging machine.

Therefore, it is conceivable to shorten the cycle time by overlapping the operation of raising the pair of seal portions and the operation of bringing the pair of seal portions close to each other in time.
For example, when the upper limit of the movement range in which the pair of seals move in the vertical direction is set as the upper limit position, the operation of raising (moving) the pair of seals to the upper limit position and the operation of moving the pair of seals closer to the ironing position (movement). It is conceivable to perform the operation of) at the same time so that the pair of seals reaches the ironing position when the pair of seals reaches the upper limit position.
In this case, since the upper limit position of the pair of seal portions is the ironing start position, it is advantageous in securing a larger ironing range for performing the ironing operation.
However, in this case, since the pair of seal portions are brought close to each other while raising the pair of seal portions, that is, the pair of seal portions move diagonally upward while approaching each other, the pair of seal portions sandwich the tubular film. However, it moves upward, pulling the tubular film upward, and the ironing operation cannot be performed normally.
Therefore, in order to avoid the above problem, it is necessary to move the pair of seal portions to the ironing position when the pair of seal portions pass the upper limit position and move below the upper limit position to perform the ironing operation. It becomes. That is, in this case, the position below the upper limit position is the ironing start position.
As a result, since the ironing operation is executed from the ironing start position at a position below the upper limit position, the ironing range becomes narrow, and some improvement is required.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a bag-making filling / packaging machine which is advantageous in securing a short cycle time while securing a squeezing range.

In order to achieve the above-mentioned object, the present invention is supported so as to be reciprocally movable in directions away from each other and reciprocally supported in the vertical direction, and a pair of joining the longitudinal ends of the tubular packaging film. A lateral sealer, a squeeze member provided on the pair of lateral sealers and integrally moving with the pair of lateral sealers in a direction of separating and approaching each other and in the vertical direction, and a cutting portion provided on the pair of lateral sealers. A link mechanism that reciprocates the pair of lateral sealers in the directions of separating and approaching, a link mechanism driving motor that drives the link mechanism, a crank mechanism that reciprocates the pair of lateral sealers in the vertical direction, and the crank. A bag-making filling and packaging machine including a crank mechanism driving motor for driving a mechanism, a control unit for controlling rotation of the link mechanism driving motor and the crank mechanism motor, and the crank mechanism of the control unit. By controlling the rotation of the drive motor, a deceleration operation of decelerating the crank mechanism drive motor by a predetermined time is executed almost at the same time when the pair of lateral sealers reach the position corresponding to the top dead point of the crank mechanism, and the control is performed. The deceleration operation is the closing operation for ironing, in which the pair of lateral sealers move to the ironing position that enables the ironing operation of the packaging film by the ironing member and stop by the rotation control of the motor for driving the link mechanism. It is characterized by being executed in duplicate in time.
Further, the present invention is characterized in that the deceleration operation includes a stop operation of stopping the crank mechanism motor for a predetermined time.
Further, the present invention is characterized in that the ironing closing operation is started from a time point immediately before the time point at which the execution of the deceleration operation is started.
Further, the present invention comprises an opening operation in which the ironing member is moved to an opening position away from the packaging film and stopped by controlling the rotation of the link mechanism driving motor of the control unit, and an ironing closing operation. The horizontal sealer opening / closing step including the sealing closing operation of moving the pair of horizontal sealers to the closing position where the packaging film is joined and stopping them is repeatedly executed, and the rotation control of the crank mechanism motor of the control unit is performed. As a result, the ascending operation of raising the pair of lateral sealers from the position corresponding to the bottom dead center of the crank mechanism to the position corresponding to the top dead center, the deceleration operation, and the pair of lateral sealers being moved to the bottom dead center. It is characterized in that the lateral sealer elevating step including the descending operation of descending and stopping toward the position corresponding to the above is repeatedly executed in synchronization with the lateral sealer opening / closing step.
Further, the present invention is characterized in that the rotation control of the crank mechanism drive motor of the control unit is performed by rotating the crank mechanism drive motor in one direction.
Further, the present invention is characterized in that the pair of lateral sealers are configured to include the ironing member.

According to the present invention, when the pair of lateral sealers reaches the position corresponding to the top dead center of the crank mechanism, a deceleration operation of decelerating the crank mechanism drive motor for a predetermined time is executed almost at the same time, and the pair of lateral sealers are squeezed members. The closing operation for ironing, which moves to the ironing position that enables the ironing operation of the packaging film and stops it, is executed at the same time as the deceleration operation.
Therefore, since the pair of lateral sealers and the ironing member can be moved to the ironing position in a state where the pair of lateral sealers and the ironing member are located at the highest position and decelerated, the packaging film is lifted upward by the ironing member. While suppressing it, the ironing range for ironing the packaging film can be secured to the maximum by the ironing member.
Further, since the ironing closing operation is executed in time with the deceleration operation, it is advantageous in ensuring a short cycle time.
Further, if the deceleration operation includes a stop operation of stopping the crank mechanism motor for a predetermined time, it is advantageous in suppressing the packaging film from being lifted upward by the ironing member, and the packaging is performed by the ironing member. It is more advantageous in ensuring the maximum squeezing range for squeezing the film.
Further, if the closing operation for ironing is started from the time immediately before the time when the execution of the deceleration operation is started, the deceleration operation can be executed during the closing operation for ironing. Therefore, the closing operation for ironing is referred to as the deceleration operation. It is more advantageous to execute in duplicate in time, and it is advantageous to secure a short cycle time.
In addition, the lateral sealer opening / closing process is repeatedly executed by the rotation control of the link mechanism drive motor of the control unit, and the lateral sealer elevating process is synchronized with the lateral sealer opening / closing process by the rotation control of the crank mechanism motor of the control unit. Repeated execution is advantageous in ensuring a short cycle time.
Further, if the rotation control of the crank mechanism drive motor of the control unit is performed by rotating the crank mechanism drive motor in one direction, a crank mechanism drive motor having a small output capacity can be adopted. This is advantageous in increasing the durability of the crank mechanism drive motor.
Further, if the pair of horizontal sealers is configured to include the ironing member, it is advantageous in reducing the number of parts.

It is a perspective view which shows the whole structure of the bag making filling and packaging machine which concerns on this embodiment. It is a perspective view of the horizontal sealing device. It is a block diagram which shows the structure of the control system of the horizontal seal device. It is explanatory drawing which shows the operation of the lateral sealer and the ironing member, (A) shows the state which the lateral sealer is located in the open position, (B) shows the state which the lateral sealer is located in the ironing position, (C) is Indicates a state in which the lateral sealer is located in the closed position. It is explanatory drawing of the top dead center and the bottom dead center of a crank mechanism. It is a timing chart explaining the operation of the horizontal sealer device of the bag making filling and packaging machine according to this embodiment, (A) is a timing chart of a motor for a crank mechanism for moving the horizontal sealer up and down, and (B) is a horizontal sealer. It is a timing chart of a motor for driving a link mechanism that opens and closes. It is explanatory drawing which shows typically the moving process of the lateral sealer from the start to the end of the ironing operation by the lateral seal device. It is a diagram which shows the relationship between the crank angle in a crank mechanism and the amount of descent from the top dead center of a lateral sealer. It is a diagram which shows the acceleration / deceleration pattern before and after the stop operation of a motor for a crank mechanism. It is a timing chart explaining the operation of the horizontal sealer device of the conventional bag making filling and packaging machine, (A) is the timing chart of the motor for the crank mechanism that moves the horizontal sealer up and down, and (B) is the link that opens and closes the horizontal sealer. It is a timing chart of a mechanism drive motor. It is explanatory drawing which shows typically the moving process of the horizontal sealer from the start to the end of the ironing operation by the horizontal sealing device of the conventional bag making filling and packaging machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the product C is put into the hopper 14 of the filling cylinder 12 of the bag-making filling and packaging machine 10 from a weighing machine (not shown), and the bag body 16 in which the product C is enclosed by the bag-making filling and packaging machine 10 is formed. It will be formed.
The bag-making filling and packaging machine 10 includes an apparatus main body 10A and a frame (not shown).
The apparatus main body 10A includes a film supply mechanism 18, a former 20, a filling cylinder 12, a film feed mechanism 22, a vertical sealing device 24, a horizontal sealing device 26, and an ironing member 28.
For convenience of explanation, the moving direction of the packaging film 2 sent from the film supply mechanism 18 to the former 20 is the front direction (arrow F direction) of the bag making filling packaging machine 10, and the opposite direction is the rear direction (arrow B). Direction), and the width direction of the packaging film 2 will be described as the width direction (arrow W direction) of the bag-making filling and packaging machine 10.
The frame includes a bottom frame (not shown), a plurality of columns erected from both sides of the bottom frame, an upper frame supported by the plurality of columns, and the like.
The filling cylinder 12 includes a filling cylinder main body 1202 arranged so as to penetrate vertically in the center of the former 20 and a hopper 14 provided on the upper portion of the filling cylinder main body 1202, and is not shown above the hopper 14. A weighing machine is installed.

The former 20 folds the strip-shaped packaging film 2 having the width and length supplied by the film supply mechanism 18 into a tubular shape on the outer peripheral surface of the filling cylinder main body 1202.
The film feeding mechanism 22 includes a pair of belt / pulley mechanisms 2202, and intermittently feeds the packaging film 2 folded into a cylindrical shape by the former 20 downward.
The vertical sealing device 24 is composed of a pair of vertical sealers 2402, and the vertical sealing device 24 is formed into a tubular film F by sealing both ends of the packaging film 2 folded into a tubular shape in the width direction.

The lateral sealing device 26 seals and cuts the end portion of the tubular film F in the length direction.
Specifically, the lower portion of the tubular film F in the length direction is sealed by the horizontal sealing device 26, and the product C weighed from the weighing machine is sealed from the filling cylinder main body 1202 via the hopper 14. It is charged inside the shape film F.
After that, the tubular film F is transferred downward by the film feed mechanism 22.
After being transferred downward, the upper part of the tubular film F into which the product C is loaded is sealed by the horizontal sealing device 26 to form a bag body 16 in which the product C is enclosed, and the tubular shape located above the bag body 16 is formed. The lower part of the film F is sealed, and at the same time, the bag body 16 in which the product C is enclosed is separated from the tubular film F above the bag body 16.

Hereinafter, the lateral sealing device 26 will be specifically described with reference to FIG.
The horizontal sealing device 26 includes a pair of vertical movement plates 32, a pair of vertical movement guide rods 34, a pair of forward / backward movement guide rods 36, a reaction block 38, a pair of horizontal sealers 40, and a cutting portion 41 ( FIG. 1), an ironing member 28 (FIG. 1), a link mechanism 42, a link mechanism drive motor 44, a crank mechanism 46, a crank mechanism motor 48, and a control unit 50 (FIG. 3). It is configured.

The horizontal sealing device 26 is provided above the bottom plate 1002 supported on the bottom frame side of the frame, and the pair of front-rear movement guide rods 36 extend in the front-rear direction of the bag-making filling / packaging machine 10 and move up and down a pair. The guide rod 34 extends in the vertical direction of the bag making filling and packaging machine 10.

A pair of vertical movement guide rods 34 are projected upward from locations located on both sides of the bag making filling and packaging machine 10 of the bottom plate 1002, and the intermediate plate 1004 is held by the upper ends of the pair of vertical movement guide rods 34. ing.
The pair of vertically moving plates 32 are arranged between the bottom plate 1002 and the intermediate plate 1004 at intervals in the width direction of the bag making filling and packaging machine 10.
The pair of vertically moving plates 32 are a plan view of the substrate portion 3202 extending in the front-rear direction of the bag-making filling / packaging machine 10 and each other in the width direction of the bag-making filling / packaging machine 10 from the front-rear end of the substrate portion 3202. It is provided with a protruding plate portion 3204 that protrudes in an approaching direction.
A guide rod 34 for vertical movement is inserted through an intermediate portion in the length direction of the substrate portion 3202, and the substrate portion 3202 is guided so as to be movable in the vertical direction by the guide rod 34 for vertical movement.
Further, the front-rear movement guide rod 36 is inserted through the protrusion plate portions 3204 at both front and rear ends, and the front-rear movement guide rod 36 is supported by the protrusion plate portions 3204 at both front and rear ends so as to be movable in the front-rear direction of the bag-making filling and packaging machine 10. Has been done.

The reaction block 38 has an elongated shape extending in the width direction of the bag making filling and packaging machine 10, and the rear ends of a pair of front-rear movement guide rods 36 are attached to both ends in the length direction, and therefore the reaction block 38 is attached. Moves in the front-rear direction of the bag-making filling and packaging machine 10 integrally with the pair of front-back movement guide rods 36.

The pair of horizontal sealers 40 are supported by a pair of seal blocks 52A and 52B and seal blocks 52A and 52B, respectively, for sandwiching the tubular film F from both sides in the front-rear direction of the bag-making filling and packaging machine 10 to perform sealing. It is provided with a pair of bar-shaped sealer bodies 54A and 54B.
The pair of seal blocks 52A and 52B and the pair of sealer bodies 54A and 54B have an elongated shape extending in the width direction of the bag making filling and packaging machine 10, and are a pair of seal blocks more than the pair of sealer bodies 54A and 54B. 52A and 52B are formed with longer dimensions.
The front ends of the pair of front-rear movement guide rods 36 are attached to both ends of one of the seal blocks 52A, so that one seal block 52A is integrated with the pair of front-rear movement guide rods 36 in the front and rear of the bag-making filling and packaging machine 10. Move in the direction.
A pair of front-rear movement guide rods 36 are inserted through both ends of the other seal block 52B, and the other seal block 52B is supported by a pair of front-rear movement guide rods 36 so as to be movable in the front-rear direction of the bag-making filling and packaging machine 10. Has been done.
In this way, one seal block 52A is attached to the front end of the pair of front-rear movement guide rods 36, and the other seal block 52B can be moved in the front-rear direction of the bag-making filling / packaging machine 10 by the pair of front-rear movement guide rods 36. The pair of sealer bodies 54A and 54B face each other while being supported by the sealer body 54A and 54B.

As shown in FIG. 4A, the ironing members 28 are arranged above and below the pair of sealer bodies 54A and 54B, respectively, and therefore the ironing members 28 arranged on the pair of sealer bodies 54A and 54B also face each other. ..
The ironing member 28 arranged in each of the sealer main bodies 54A and 54B includes a shutter 2802 and an urging member 2804.
The shutter 2802 is supported by a guide mechanism (not shown), and this guide mechanism is supported by the sealer blocks 52A and 52B. Therefore, the shutter 2802 is integrally packed and packaged with the sealer bodies 54A and 54B (sealer blocks 52A and 52B). It is supported so as to be slidable in the front-rear direction of the machine 10.
The shutter 2802 has a strip-like shape, and is provided in parallel with the upper and lower surfaces of the pair of sealer bodies 54A and 54B so that their longitudinal directions match the extending direction of the sealer bodies 54A and 54B.
The edge portion 2802A located on one side in the width direction orthogonal to the longitudinal direction of the shutter 2802 abuts on the tubular film F (wrapping film 2) to form an edge portion 2802A that performs an ironing operation.
Therefore, the upper and lower shutters 2802 provided above and below the pair of sealer bodies 54A and 54B have their edges 2802A facing each other.
The upper and lower shutters 2802 are slidably supported in the front-rear direction of the bag-making filling and packaging machine 10 by a guide mechanism (not shown), in other words, the edge portion 2802A is brought into contact with and separated from the tubular film F (packaging film 2). It is supported so that it can slide in the direction of the sill.
As shown in FIG. 4A, the urging member 2804 is always in a protruding position so that the edges 2802A of the upper and lower shutters 2802 project from the tip surface of the sealer main body 54A and 54B facing the packaging film 2. The protruding positions of the upper and lower shutters 2802 are determined by a guide mechanism (not shown).

As shown in FIG. 1, the cutting portion 41 has a cutter 4102 provided in one sealer main body 54A, a cutter insertion groove (not shown) provided in the other sealer main body 54B, and a cutter 4102 in the cutter insertion groove. It is configured to include an actuator such as an air cylinder to be inserted and removed, and the cutter 4102 is inserted into the cutter insertion groove. The packaging film 2 (cylindrical film F) is cut in the width direction thereof.

As shown in FIG. 2, the link mechanism 42 reciprocates a pair of lateral sealers 40 in a direction in which they are separated and approached in the front-rear direction of the bag-making filling / packaging machine 10.
The link mechanism 42 includes a first link body 4202, a second link body 4204, and a third link body 4206.
The intermediate portion of the first link body 4202 in the longitudinal direction is coupled to the output shaft 4302 for forward / backward movement extending in the vertical direction of the speed reducer 43 connected to the motor 44 for driving the link mechanism, and the output shaft 4302 for forward / backward movement. It is supported so as to be rotated integrally with the horizontal plane.
One end of the second link body 4204 is rotatably connected to one end of the first link body 4202, and the other end is rotatably connected to the intermediate portion of the reaction block 38 via a bracket 3802.
One end of the third link body 4206 is rotatably connected to the other end of the first link body 4202, and the other end is rotatably connected to the intermediate portion of the other seal block 52B via the bracket 5202. ..

As shown in FIG. 2, the link mechanism driving motor 44 drives the link mechanism 42, and the link mechanism driving motor 44 is supported by the vertical movement plate 32 via a support member (not shown), and therefore. The position of the forward / backward movement output shaft 4302 is unchanged with respect to the opening / closing operation of the horizontal sealer 40, and moves up and down together with the vertical movement plate 32 in the vertical movement of the horizontal sealer 40 described later.
When the link mechanism drive motor 44 rotates in the forward and reverse directions, the first link body 4202 is rotated in the forward and reverse directions via the forward / backward movement output shaft 4302.
When the first link body 4202 is rotated by the forward / reverse rotation of the link mechanism drive motor 44, the position of the forward / backward movement output shaft 4302 in the bag-making filling / packaging machine 10 does not change, so that a reaction occurs via the link mechanism 42. The block 38 and the other seal block 52B are linearly moved back and forth in the front-rear direction of the bag-making filling / packaging machine 10 while being guided by the pair of front-rear movement guide rods 36.
Further, due to the movement of the reaction block 38, one seal block 52A and the other seal block 52B reciprocate in the front-rear direction of the bag-making filling / packaging machine 10 in the direction of contacting and separating from each other via the pair of front-back movement guide rods 36. It is moved in a straight line.
Therefore, by controlling the rotation of the link mechanism driving motor 44, the pair of lateral sealers 40 and the pair of ironing members 28 are moved in the directions of separating and approaching.

As shown in FIG. 2, the crank mechanism 46 reciprocates a pair of lateral sealers 40 in the vertical direction.
The crank mechanism 46 includes a fourth link body 4602 and a fifth link body 4604, and the crank mechanism 46 is driven by a crank mechanism drive motor 48.
The fourth link body 4602 is coupled to the vertical movement output shaft 4902 of the speed reducer 49 extending in the width direction of the bag making filling / packaging machine 10 having one end in the longitudinal direction connected to the crank mechanism motor 48, and is vertically moved. It is supported so as to be rotated in a vertical plane integrally with the moving output shaft 4902.
The other end of the fourth link body 4602 is rotatably connected to one end in the longitudinal direction of the fifth link body 4604.
The other end of the fifth link body 4604 in the longitudinal direction is rotatably connected to one of the vertically moving plates 32 via the bracket 3210.

As shown in FIG. 2, the crank mechanism driving motor 48 drives the crank mechanism 46, and the crank mechanism driving motor 48 is supported on the frame side of the bag-making filling and packaging machine 10 via the intermediate plate 1004. Therefore, the position of the vertical movement output shaft 4902 in the bag-making filling and packaging machine 10 does not change.
In the present embodiment, when the crank mechanism drive motor 48 rotates in one direction, the fourth link body 4602 is rotated in one direction via the vertical movement output shaft 4902.
Therefore, the fourth link body 4602 is rotated in one direction by the crank mechanism drive motor 48, so that the pair of vertical movement plates 32 and the pair of forward / backward movement guide rods 36 move up and down via the fifth link body 4604. The pair of lateral sealers 40 and the pair of ironing members 28 are linearly reciprocated in the vertical direction.
As shown in FIG. 5, the pair of lateral sealers 40 and the pair of ironing members 28 are at the highest position at the top dead center of the crank mechanism 46, and are at the lowest position at the bottom dead center.

As shown in FIG. 3, the control unit 50 controls the rotation of the link mechanism drive motor 44 and the crank mechanism drive motor 48, that is, controls the rotation direction, the rotation amount, and the rotation speed, and is as follows. The control operation of the control unit 50 will be described.

Next, the operation of the horizontal sealing device 26 will be described with reference to the timing chart of FIG.
FIG. 6A is a timing chart of the crank mechanism drive motor 48 for moving the horizontal sealer 40 up and down, and FIG. 6B is a timing chart of the link mechanism drive motor 44 for opening and closing the horizontal sealer 40. FIG. 6A. ) And (B) have the same time axis.
The time unit on the horizontal axis is represented by a numerical value in which T / 100 is set to "1", where T is the time required to execute the horizontal sealing of one bag body 16 by the horizontal sealing device 26. In this specification, for convenience, the numerical value 0 to the numerical value 100 will be described as the time point 0 to the time point 100.
Therefore, each timing chart shows the operation of each motor from the time point 0 to the time point 100 (corresponding to the next time point 0).
The vertical axis shows the stopped state (rotational stopped state) of each motor with an L level signal, and the operating state (rotational state) of each motor with an H level signal.
Therefore, the rising edge of the signal of each timing chart corresponds to the start point of rotation of each of the motors 44, 48, and the falling edge of the signal corresponds to the stop point of rotation of each of the motors 44, 48.

As shown in FIGS. 6A and 7, at time point 0, the crank mechanism 46 is located at bottom dead center, the pair of lateral sealers 40 is located at the lowest position, and therefore the pair of lateral sealers 40 are up and down. It is located at the horizontal sealing position P1 (FIG. 4 (C)) for laterally sealing the tubular film F (wrapping film 2) in the direction.
The control unit 50 starts the rotation of the crank mechanism driving motor 48 from the time point 0 (corresponding to the bottom dead center of the crank mechanism 46), and operates the crank mechanism 46 toward the top dead center.
That is, the control unit 50 executes an ascending operation of raising the pair of lateral sealers 40 from the position corresponding to the bottom dead center of the crank mechanism 46 to the position corresponding to the top dead center by the crank mechanism driving motor 48.
When the top dead center (time point 40) is reached, that is, almost at the same time when the pair of lateral sealers 40 reach the position P0 corresponding to the top dead center of the crank mechanism 46, the control unit 50 determines the crank mechanism drive motor 48. The stop operation of stopping for the time Δts is executed.
In other words, a stop operation is executed in which the pair of lateral sealers 40 are stopped at the highest position for a predetermined time Δts.

On the other hand, as shown in FIGS. 6B and 7, the control unit 50 reverses the link mechanism driving motor 44 from the time point 0, and closes the pair of lateral sealers 40 via the link mechanism 42 (FIG. 4). After moving from (C)) to the opening position (FIG. 4A), the link mechanism drive motor 44 is stopped, and the opening operation of stopping the pair of lateral sealers 40 at the opening position is executed.
Here, the closed position of the pair of horizontal sealers 40 is a position where the tubular film F (wrapping film 2) is sandwiched between the pair of horizontal sealers 40 and the horizontal seal is performed, and the pair of horizontal sealers 40 are closest to each other. The position.
As shown in FIG. 4C, at the closed position of the pair of lateral sealers 40, the pair of shutters 2802 resists the urging force of the urging member 2804 by the edge portion 2802A coming into contact with the packaging film 2. It is displaced from the protruding position to the retracted position.
The opening position of the pair of lateral sealers 40 is a position where the pair of lateral sealers 40 and the pair of ironing members 28 are separated from the packaging film 2, and the positions where the pair of lateral sealers 40 are most separated from each other.
Next, the control unit 50 rotates the link mechanism drive motor 44 in the normal direction following the opening operation, and the pair of lateral sealers 40 are squeezed from the opening position to the squeezing position of the packaging film 2 by the squeezing member 28. (Fig. 4 (B)) is moved to stop, and the ironing closing operation is executed.
The position in the vertical direction of the pair of lateral sealers 40 at this time is the squeezing start position P0, and the position corresponding to the top dead center P0.
As a result, as shown in FIG. 4B, the tubular film F is sandwiched by the edges 2802A of the upper and lower shutters 2802 urged by the urging member 2804 of the pair of ironing members 28. At this time, the pair of horizontal sealers 40 (the pair of sealer bodies 54A and 54B) do not come into contact with the tubular film F, and a gap is secured between the pair of horizontal sealers 40 and the tubular film F.
Then, as shown in FIGS. 6A and 6B, this squeezing closing operation is executed in a timely overlap with the above-mentioned stopping operation.
In the present embodiment, the ironing closing operation is started from a time immediately before the time when the execution of the stopping operation is started.

As shown in FIGS. 6A, 6B, and 7B, the control unit 50 starts the rotation of the crank mechanism drive motor 48 at the same time as the ironing closing operation is completed, and laterally sets the pair of lateral sealers 40. The descending operation of descending toward the seal position P1 (position corresponding to the bottom dead center) and stopping for a predetermined time is executed (corresponding to the ironing section of FIG. 6B).
As a result, the squeezing operation is started by the squeezing member 28, and the cylindrical film F (wrapping film 2) is squeezed by moving the edges 2802A of the upper and lower shutters 2802 downward while sandwiching the wrapping film 2. The product C and its fragments located in the tubular film F are forcibly moved downward.
That is, as shown in FIG. 7, the range from the position P0 (ironing start position P0) at the position corresponding to the top dead center of the pair of lateral sealers 40 to the lateral seal position P1 of the pair of lateral sealers 40 depends on the ironing member 28. It becomes the ironing range X where the ironing operation is performed.
When the pair of lateral sealers 40 reach the lateral seal position P1 (when the ironing operation is completed), the control unit 50 rotates the link mechanism drive motor 44 in the normal direction and moves the pair of lateral sealers 40 from the ironing position. The sealing closing operation of moving the tubular film F (wrapping film 2) to a closing position for joining and stopping for a predetermined time is executed (corresponding to the sealing section of FIG. 6B).
As a result, the tubular film F is sealed by the pair of horizontal sealers 40.
If the seal is made, the cut portion 41 cuts the portion of the tubular film F joined by the horizontal sealer 40.
That is, immediately before the end of the sealing operation, the portion of the tubular film F is cut by the cutting portion 41, and the bag body 16 in which the product C is enclosed is separated from the tubular film F.
When the bag body 16 is separated, it returns to the time point 0 and the same operation as above is repeatedly executed.

In this way, by controlling the rotation of the link mechanism drive motor 44 of the control unit 50, the lateral sealer opening / closing process including the opening operation, the ironing closing operation, and the sealing closing operation is repeatedly executed, and the control unit 50 is executed. By controlling the rotation of the crank mechanism drive motor 48, the product C is enclosed by repeatedly executing the lateral sealer elevating process including the ascending operation, the stopping operation, and the descending operation in synchronization with the lateral sealer opening / closing process. The bag bodies 16 are produced one by one.

According to the present embodiment, when the pair of lateral sealers 40 reach the position corresponding to the top dead center of the crank mechanism 46, the stop operation of stopping the crank mechanism drive motor 48 for a predetermined time is executed almost at the same time, and the pair of lateral sealers 40 are stopped. The closing operation for ironing, in which the lateral sealer 40 moves to the ironing position that enables the ironing operation of the packaging film 2 by the ironing member 28 and is stopped, is executed at the same time as the stopping operation.
Therefore, since the pair of lateral sealers 40 and the ironing member 28 can be moved to the ironing position in a state where the pair of lateral sealers 40 and the ironing member 28 are located at the highest position and stopped, the cylindrical film F is formed by the ironing member 28. While suppressing the (wrapping film 2) from being lifted upward, the ironing member 28 can secure the maximum ironing range X for ironing the tubular film F (packaging film 2).
Further, since the ironing closing operation is executed in time with the stopping operation, it is advantageous in ensuring a short cycle time.

In this embodiment, as shown in FIGS. 6A and 6B, the ironing closing operation is started from a time immediately before the execution of the stopping operation is started. Since the stop operation can be executed during the ironing closing operation, it is more advantageous to execute the ironing closing operation in a timely overlap with the stop operation, and it is more advantageous to secure a short cycle time.

When the closing operation for ironing is started from a time immediately before the time when the execution of the stopping operation is started, the cylindrical film F (wrapping film 2) is moved upward by the ironing member 28 that moves upward. However, the problem is negligible for the following reasons.

(1) FIG. 8 is a diagram showing the crank angle of the crank mechanism 46 and the amount of descent of the pair of lateral sealers 40 and the ironing member 28 from the top dead center, and the crank angle of 180 ° corresponds to the top dead center.
As is clear from FIG. 8, in the vicinity of the top dead center, the amount of upward movement of the pair of lateral sealers 40 and the ironing member 28 is gradual with respect to the amount of change in the crank angle.
Therefore, even if the closing operation for ironing is started at a time immediately before the time when the execution of the stop operation is started (near the top dead center), the amount of movement above the ironing member 28 is so small that the amount of movement above the ironing member 28 is negligible. It is possible to avoid a problem that the tubular film F (wrapping film 2) is lifted upward by the 28.

(2) FIG. 9 is a diagram showing an acceleration / deceleration pattern of the crank mechanism drive motor 48, in which time is shown on the horizontal axis and rotation speed is shown on the vertical axis.
As shown in FIG. 9, immediately before the crank mechanism drive motor 48 is stopped, the deceleration control of the motor is performed so that the slope of the speed becomes extremely gentle. It should be noted that such speed deceleration control immediately before the motor is stopped is generally performed.
Therefore, at a time immediately before the start of execution of the stop operation (near the top dead center of the crank mechanism 46), the rotation speed of the crank mechanism drive motor 48 becomes almost zero, and the pair of lateral sealers 40 and the ironing member 28 The amount of movement upward per unit time is extremely small.
Therefore, even if the closing operation for ironing is started at a time immediately before the time when the execution of the stop operation is started (near the top dead center), the amount of movement above the ironing member 28 becomes smaller. It is possible to avoid a problem that the tubular film F (wrapping film 2) is lifted upward.

Further, in the present embodiment, when the pair of lateral sealers 40 reach the position corresponding to the top dead center of the crank mechanism 46 (ironing start position P0), the crank mechanism drive motor 48 is stopped for a predetermined time Δts almost at the same time. Although the case where the operation is executed has been described, the crank mechanism driving motor 48 may be decelerated by a predetermined time instead of the stop operation.
That is, even if the crank mechanism drive motor 48 is not completely stopped, the crank mechanism drive motor 48 is greatly decelerated to squeeze at a point immediately before the start of deceleration operation (near top dead center). The amount of movement above the ironing member 28 can be made negligibly small even when the closing operation is started, and therefore, in order to avoid a problem that the tubular film F (wrapping film 2) is lifted upward by the ironing member 28. It will be advantageous.
Therefore, since the pair of lateral sealers 40 and the ironing member 28 can be moved to the ironing position in a state where the pair of lateral sealers 40 and the ironing member 28 are located at the highest position and decelerated, the cylindrical film F is formed by the ironing member 28. While suppressing the (wrapping film 2) from being lifted upward, the ironing member 28 can secure the maximum ironing range X for ironing the tubular film F (packaging film 2).
Therefore, in the present invention, the deceleration operation includes a stop operation.

Further, in the present embodiment, the case where the ironing member 28 is configured to include the pair of lateral sealers 40 and the upper and lower shutters 2802 provided separately, but the ironing member 28 is omitted and the pair of ironing members 28 is omitted. The horizontal sealer 40 (tips of the sealer bodies 54A and 54B) may be used as the ironing member 28, which is advantageous in reducing the number of parts.

Further, in the present embodiment, the case where the control unit 50 raises and lowers the lateral sealer 40 by rotating the crank mechanism drive motor 48 in only one direction has been described, but the present invention describes the crank mechanism drive motor 48. Of course, it is also applicable to the case where the lateral sealer 40 is moved up and down by reversing the forward and reverse directions.
However, if the crank mechanism drive motor 48 is rotated in only one direction as in the present embodiment, the crank mechanism drive motor 48 is affected as compared with the case where the crank mechanism drive motor 48 is rotated in the forward and reverse directions. The load can be reduced.
Therefore, an inexpensive motor with a relatively small output capacity can be adopted as the crank mechanism drive motor 48, which is advantageous in reducing the cost, and the load is reduced to improve the durability of the crank mechanism drive motor 48. It is advantageous to raise it.

Next, the operation of the conventional horizontal sealing device will be described in comparison with the present embodiment with reference to the timing chart of FIG. 10 and the schematic explanatory view of FIG.
10 (A) and 10 (B) correspond to FIGS. 6 (A) and 6 (B), respectively, and FIG. 10 (A) is a timing chart of the crank mechanism drive motor 48 for moving the lateral sealer 40 up and down. , (B) are timing charts of the link mechanism drive motor 44 that opens and closes the lateral sealer 40, and the time axes of both are the same.
Further, FIG. 11 corresponds to FIG. 7, and schematically shows the moving process of the lateral sealer 40 from the start to the end of the ironing operation.

As shown in FIGS. 10A and 11, the control unit 50 starts the rotation of the crank mechanism drive motor 48 from the time point 0 (corresponding to the bottom dead center of the crank mechanism 46) toward the top dead center. The crank mechanism 46 is operated.
That is, the control unit 50 uses the crank mechanism drive motor 48 to form a pair of horizontal sealers from the position corresponding to the bottom dead center (horizontal seal position P1) of the crank mechanism 46 to the position PD (FIG. 11) corresponding to the top dead center. Perform an ascending motion to ascend 40.
In the conventional device, even when the top dead center (time point 40) is reached, the control unit 50 continues to rotate the crank mechanism drive motor 48, and unlike the embodiment, the stop operation is not executed.

On the other hand, as shown in FIGS. 10B and 11, the control unit 50 reverses the link mechanism driving motor 44 from the time point 0, and closes the pair of lateral sealers 40 via the link mechanism 42 (FIG. 4). After moving from (C)) to the opening position (FIG. 4A), the link mechanism drive motor 44 is stopped, and the opening operation of stopping the pair of lateral sealers 40 at the opening position is executed.
Next, the control unit 50 rotates the link mechanism drive motor 44 in the normal direction at the time when the opening operation is completed and the crank mechanism 46 reaches the top dead center, and the pair of lateral sealers 40 are formed into a cylinder by the ironing member 28. The squeezing closing operation for moving to the squeezing position (FIG. 4 (B)) that enables the squeezing operation of the state film F (wrapping film 2) and stopping the squeezing operation is executed. At this time, the vertical position of the pair of horizontal sealers 40 is the ironing start position P0.
As a result, as shown in FIG. 4B, the tubular film F (wrapping film 2) is sandwiched by the edges 2802A of the upper and lower shutters 2802 urged by the urging member 2804 of the pair of ironing members 28.
Then, this closing operation for ironing is started at the same time as the crank mechanism 46 reaches the top dead center. Therefore, at the start of the ironing operation, the ironing member 28 has already moved downward and the ironing member 28 is in the open position. Since the film moves from (FIG. 4 (A)) to the ironing position (FIG. 4 (B)), the problem that the tubular film F (wrapping film 2) is lifted upward by the ironing member 28 is avoided.

As shown in FIGS. 10A, 10B, and 11A, the control unit 50 continues to rotate the crank mechanism drive motor 48, and the pair of lateral sealers 40 are placed at the lateral seal position P1 (bottom dead center). The descent operation of descending toward the position corresponding to) and stopping for a predetermined time is executed.
As a result, when the tubular film F (wrapping film 2) is squeezed by the squeezing member 28 and the pair of lateral sealers 40 reach the lateral sealing position P1 (when the squeezing is completed), the control unit 50 receives the ironing. The link mechanism drive motor 44 is rotated in the normal direction, and the pair of lateral sealers 40 are moved from the ironing position to the closing position where the tubular film F (wrapping film 2) is joined to execute the sealing closing operation for stopping for a predetermined time. ..
As a result, the tubular film F (wrapping film 2) is sealed by the pair of horizontal sealers 40, and the portion of the tubular film F (wrapping film 2) joined by the horizontal sealer 40 is cut by the cutting portion 41. The bag body 16 in which C is enclosed is separated from the tubular film.
When the bag body 16 is separated, it returns to the time point 0 and the same operation as above is repeatedly executed.

As described above, in the conventional device, in order to avoid a problem that the tubular film F (packaging film 2) is lifted upward by the ironing member 28, the ironing member 28 is positioned PD corresponding to the top dead center of the crank mechanism 46 (FIG. FIG. In the process of moving downward from 11), the ironing member 28 has to be moved from the opening position (FIG. 4 (A)) to the ironing position (FIG. 4 (B)).
Therefore, the ironing start position P0 is located below the position PD (FIG. 11) corresponding to the top dead center, which is disadvantageous in securing the ironing range X'.
Therefore, as is clear from the comparison between FIGS. 7 and 11, in the present embodiment, it is advantageous to secure the ironing range X larger than the ironing range X'of the conventional apparatus.

2 Packaging film 10 Bag making Filling packaging machine 12 Filling cylinder 1202 Filling cylinder body 14 Hopper 16 Bag body 10A Device body 1002 Bottom plate 1004 Intermediate plate 18 Film supply mechanism 20 Former 22 Film feeding mechanism 2202 Belt / pulley mechanism 24 Vertical sealing device 2402 Vertical Sealer 26 Lateral sealer 28 Ironing member 2802 Shutter 2804 Bouncer 2802A Edge 32 Vertical movement plate 3202 Board part 3204 Protruding plate 3210 Bracket 34 Vertical movement guide rod 36 Back and forth movement guide rod 38 Reaction block 3802 Bracket 40 Horizontal sealer 41 Cutting part 4102 Cutter 42 Link mechanism 4202 1st link body 4204 2nd link body 4206 3rd link body 44 Link mechanism drive motor 45 Reducer 46 Crank mechanism 4602 4th link body 4604 5th link body 48 For crank mechanism drive Motor 50 Control unit 52A, 52B Seal block 5202 Bracket 54A, 54B Sealer body F Cylindrical film P product

Claims (6)

A pair of lateral sealers that are reciprocably supported in directions that are separated from each other and reciprocated in the vertical direction and that join the longitudinal ends of the tubular packaging film.
An ironing member provided on the pair of lateral sealers and moving integrally with the pair of lateral sealers in a direction in which they are separated from each other and in a vertical direction.
The cut portion provided in the pair of horizontal sealers and
A link mechanism that reciprocates the pair of lateral sealers in the directions of separating and approaching each other.
A motor for driving the link mechanism that drives the link mechanism, and a motor for driving the link mechanism,
A crank mechanism that reciprocates the pair of horizontal sealers in the vertical direction,
The crank mechanism drive motor that drives the crank mechanism and
A control unit that controls the rotation of the link mechanism drive motor and the crank mechanism motor,
It is a bag-making filling and packaging machine equipped with
By controlling the rotation of the crank mechanism drive motor of the control unit, deceleration that decelerates the crank mechanism drive motor by a predetermined time almost at the same time when the pair of lateral sealers reach the position corresponding to the top dead center of the crank mechanism. The action is performed,
The rotation control of the link mechanism drive motor of the control unit causes the pair of lateral sealers to move to a squeeze position that enables the squeeze operation of the packaging film by the squeeze member and stop the squeeze closing operation. It is executed in a timely manner that overlaps with the operation.
A bag-making filling and packaging machine characterized by that. The deceleration operation includes a stop operation of stopping the crank mechanism motor for a predetermined time.
The bag-making filling and packaging machine according to claim 1. The ironing closing operation is started from a time point immediately before the time when the execution of the deceleration operation is started.
The bag-making filling and packaging machine according to claim 1 or 2. By controlling the rotation of the link mechanism drive motor of the control unit, the ironing member is moved to an opening position away from the packaging film to stop the opening operation, the ironing closing operation, and the pair of lateral sealers. The horizontal sealer opening / closing step including the sealing operation for sealing by moving the packaging film to the closing position for joining and stopping the bonding is repeatedly executed.
By controlling the rotation of the crank mechanism motor of the control unit, the pair of lateral sealers are raised from the position corresponding to the bottom dead center of the crank mechanism to the position corresponding to the top dead center, and the deceleration operation. The horizontal sealer elevating step including the lowering operation of lowering and stopping the pair of horizontal sealers toward the position corresponding to the bottom dead center is repeatedly executed in synchronization with the horizontal sealer opening / closing step.
The bag-making filling and packaging machine according to any one of claims 1 to 3, wherein the bag-making filling and packaging machine is characterized in that. The rotation control of the crank mechanism drive motor of the control unit is performed by rotating the crank mechanism drive motor in one direction.
The bag-making filling and packaging machine according to any one of claims 1 to 4, wherein the bag-making filling and packaging machine is characterized in that. The pair of lateral sealers are configured to include the ironing member.
The bag-making filling and packaging machine according to any one of claims 1 to 5, wherein the bag-making filling and packaging machine is characterized in that.

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