JP2001058614A - Lateral sealing mechanism for bag making/packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit and remove a seal preparation mechanism having auxiliary tools such as a shutter plate and an ironing plate by the one-touch operation, avoid the uneven load and smoothly move forward and backward, stabilize the forward and backward movement of a holding tool and improve the durability of the holding tool. SOLUTION: A lateral sealing mechanism 51A is provided with a shutter plate mechanism 55 with a shutter plate 55A and a shutter plate fitting and removing mechanism 77 setting and removing the shutter plate mechanism 55, and the shutter plate fitting and removing mechanism 77 is provided with a connecting and engaging plate 79a, a base plate 66 with a holding channel 66a, a locking mechanism 80 and an unlocking mechanism 87. Thus, the connecting and engaging plate 51A can be locked in the engaging state by the locking mechanism 80 by only engaging the connecting and engaging plate 79a with the holding channel 66a of a base plate 66 of the shutter plate mechanism 55. The engagement of the connecting and engaging plate 79a can be simply released by the unlocking mechanism 87, and the shutter plate mechanism 55 with the shutter plate 55A can be fitted or removed by the one-touch operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal sealing mechanism of a bag making and packaging machine such as a vertical pillow packaging machine, and more particularly, to a seal preparation mechanism having a packaging auxiliary tool such as a shutter plate or an ironing plate of the horizontal sealing mechanism. The present invention relates to a device configured to be detachable and a device configured to prevent the auxiliary tool from locking due to an uneven load.

[0002]

2. Description of the Related Art Conventionally, in a vertical pillow packaging machine,
After the band-shaped packaging material (film) is bent into a cylindrical shape by a former, and the mating portion of the cylindrical packaging material is vertically heat-sealed,
In parallel with the filling operation of the article to be packaged, the horizontal packaging and sealing by the pair of horizontal sealing mechanisms are continuously performed, and the middle position in the height direction of the horizontal sealing portion is cut to perform bag making packaging. By the way, if the packaged product is fragile like potato chips or snacks and easily formed into small pieces, when the packaged product is filled in the packaging material and sealed horizontally with the horizontal sealing jaws, the packaged Various horizontal sealing mechanisms have been proposed in which a shutter plate is provided near the upper side of the sealing portion so as to sandwich the packaging material from both sides so that the packaged object does not fall after the package and the packaged object does not bite into the sealing portion. I have.

[0003] For example, the present applicant has disclosed in
No. 09, JP-A-8-175523, prior to the horizontal packaging, a pair of shutter plates sandwiching the packaging material near the upper side of the sealing portion in an opposing manner, and a pair of shutter plates near the lower side of the sealing portion. A bag making and packaging machine has been proposed in which a pair of ironing plates sandwiching a packaging material in opposition are provided in a pair of horizontal sealing mechanisms. In this type of bag making and packaging machine, two sets of swivel arms that rotate inward each other so as to sandwich the movement path of the packaging material, and support the base ends of these two sets of swivel arms to approach and separate from each other. A pair of horizontal seal mechanisms for performing horizontal packaging and sealing by performing a swiveling motion (D-shaped swiveling motion) having a linear locus portion along the moving path of the packaging material via a set of movable frames is provided.

In Japanese Unexamined Patent Publication No. Hei 6-20209, each horizontal sealing mechanism is provided with a horizontal sealing jaw for sealing the horizontal packaging, a shutter plate above the horizontal sealing jaw, and an ironing device below the horizontal sealing jaw. A plate is provided. In the shutter plate, a guide cylinder is fixed to each of a pair of spaced support sleeves, and a support rod is slidably supported on each guide cylinder in a direction orthogonal to the length direction of the shutter plate. The shutter plate is connected to the tip of the shutter rod, and the shutter plate is elastically urged toward the advancing side by a compression spring mounted on each support rod.

[0005] Prior to the horizontal packaging sealing by the horizontal sealing jaws, the package material near the upper side of the horizontal packaging sealing portion is sandwiched between the pair of shutter plates so as to oppose the falling of the article to be packaged. This prevents the package from being laterally sealed while being bitten. Further, the ironing plate is fixed to the lower side of the horizontal sealing jaws. Prior to the horizontal packaging sealing by the horizontal sealing jaws, a pair of ironing plates is used to seal the packaging material near the lower side of the horizontal packaging sealing portion. By moving downward while sandwiched in opposition, the packaged material adhering to the vicinity of the horizontal packaging sealing part of the packaging material is squeezed down, and the horizontal packaging is sealed with the packaged product biting Is prevented from doing so. However, in the horizontal seal mechanism disclosed in this publication, the shutter plate cannot be removed.

[0006] In Japanese Patent Application Laid-Open No. 8-175523, a mechanism for supporting a shutter plate in a horizontal sealing mechanism is different from the device of the above-mentioned publication. That is, a pair of support portions protruding in a direction perpendicular to the length direction of the shutter plate are formed in proximity to the side opposite to the advance side of the shutter plate, and the support member is connected to a connection member connected to the pair of bearings. And a pair of support portions are slidably supported by guide holes of the pair of support members, and the shutter plate is elastically urged toward the advancing side by a compression spring provided on the support portions. The ironing plate is disclosed in
The ironing plate is elastically biased toward the advancing side by the same mechanism as the shutter plate disclosed in Japanese Patent Publication No. 20209. Also in this horizontal sealing mechanism, the shutter plate cannot be removed.

[0007]

Problems to be Solved by the Invention
No. 9 and JP-A-8-175523, in a conventional vertical pillow packaging machine, when an object to be packaged scatters and adheres to the entire horizontal sealing mechanism due to poor sealing or the like, a shutter plate or an ironing plate is removed. It can only be cleaned in the mounted state, and only the outer side is cleaned while rotating the horizontal seal mechanism by manual operation, so it is difficult to shorten the cleaning time and shorten the cleaning time.

In particular, when the packaged object is food, it is necessary to always keep various mechanisms disposed on the transporting path of the packaged object clean, so that daily cleaning work is indispensable, and the fineness of the cleaning work is indispensable. Is required. However, the horizontal seal mechanism has many projections, and cannot clean the details in detail. Therefore, there is a case where the shutter plate and the ironing plate are removed and cleaned by using a tool such as a wrench, but the work of attaching and detaching the shutter plate and the ironing plate is complicated, and it takes a lot of labor to attach and detach the shutter plate and the ironing plate. There's a problem.

On the other hand, in the conventional structure in which the shutter plate and the ironing plate advance and retreat in parallel, the load can be absorbed only when the load is evenly applied to the shutter plate and the ironing plate. For example, if the packaged object is caught only at one end in the length direction of the shutter plate or the ironing plate, the load does not act evenly but acts as an eccentric load. Tilt from the orthogonal posture. In this case, the self-locking state occurs, and abnormal frictional resistance acts on the support rod, causing play due to abrasion, causing abnormal wear due to the play, and lowering the durability, so that the shutter plate and the ironing plate are damaged. Will be.

In recent years, packaging operations have been accelerated,
Packaging and packaging have been performed continuously at a high speed of 100 times or more per minute. Therefore, the load due to the collision between the shutter plate and the ironing plate at the time of sealing increases, and the frequency of receiving the load has also increased, so that the frequency of breakage of the shutter plate and the ironing plate has increased. In this case, unless the shutter plate and the ironing plate are quickly replaced, the packaging operation will be hindered. In particular, if it takes time to replace these shutter plates and ironing plates during high-speed bag making and packaging operation, the work interruption time will be prolonged, and the production efficiency will be greatly reduced. ing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a one-touch detachable seal preparation mechanism having an auxiliary tool such as a shutter plate or an ironing plate so that the time required for attachment and detachment can be shortened. To enhance. Furthermore, even when the bias load is applied to the assisting device, it can be smoothly advanced and retracted,
It is possible to surely prevent the breakage of the assisting tool and increase the durability of the assisting tool.

[0012]

The horizontal sealing mechanism of the bag making and packaging machine according to claim 1 performs bag forming and packaging in which the band-shaped packaging material is formed in a tubular shape and the horizontal packaging and sealing are performed in parallel with the filling operation of the article to be packaged. In the machine, a pair of horizontal sealing mechanisms for performing horizontal packaging sealing is provided on the packaging material, and each horizontal sealing mechanism includes a sealing preparation mechanism for sandwiching the vicinity of the horizontal packaging sealing portion of the packaging material and a horizontal sealing mechanism for the sealing preparation mechanism. And a detachable mechanism that detachably supports the detachable mechanism.
A connecting engagement plate connected to the side seal mechanism side and capable of engaging with the seal preparation mechanism; a holding member formed on the seal preparation mechanism side so as to detachably engage the connection engagement plate; And a lock release mechanism for releasing the lock of the lock mechanism.

The pair of horizontal sealing mechanisms are driven by a driving mechanism to perform horizontal packaging and sealing of the packaging material. Each horizontal sealing mechanism
A seal preparation mechanism, and a detachment mechanism that detachably supports the seal preparation mechanism, the detachment mechanism includes a coupling engagement plate coupled to the horizontal seal mechanism side, and a holding member formed on the seal preparation mechanism side; Since a lock mechanism and a lock release mechanism for releasing the lock are provided, the locking mechanism holds the coupling engagement plate provided on the side seal mechanism side only by engaging the holding member formed on the seal preparation mechanism side. The material can be locked in the engagement state with the coupling engagement plate. When removing the seal preparing mechanism, the lock of the lock mechanism is released by the lock releasing mechanism, and the coupling engaging plate is removed from the holding member, so that the seal preparing mechanism can be easily removed.

[0014] The lateral sealing mechanism of the bag making and packaging machine according to claim 2 is
In a bag making and packaging machine that performs tubular forming and horizontal packaging and sealing of a band-shaped packaging material in parallel with a filling operation of an article to be packaged, a pair of horizontal sealing mechanisms for performing horizontal packaging and sealing on the packaging material are provided. The sealing mechanism is
A seal preparation mechanism that sandwiches the vicinity of the horizontal packaging sealing portion of the packaging material,
An attachment / detachment mechanism that detachably supports the seal preparation mechanism with the horizontal seal mechanism, the attachment / detachment mechanism being connected to the seal preparation mechanism side and capable of engaging with the horizontal seal mechanism; It has a holding member formed on the side seal mechanism side so as to be detachably engaged, a lock mechanism for locking the holding member, and a lock release mechanism for unlocking the lock mechanism. is there.

The pair of horizontal sealing mechanisms are driven by a driving mechanism to perform horizontal packaging and sealing of the packaging material. Each horizontal sealing mechanism
A seal preparation mechanism, and a detachment mechanism that detachably supports the seal preparation mechanism, the detachment mechanism includes a coupling engagement plate coupled to the seal preparation mechanism side, and a holding member formed on the horizontal seal mechanism side; A lock mechanism and a lock release mechanism for releasing the lock are provided, so that the coupling mechanism provided on the seal preparation mechanism side is engaged with the holding material formed on the horizontal seal mechanism side, and is held by the lock mechanism. The material can be locked in the engagement state with the coupling engagement plate. When removing the seal preparing mechanism, the lock of the lock mechanism is released by the lock releasing mechanism, and the coupling engaging plate is removed from the holding member, so that the seal preparing mechanism can be easily removed.

The lateral sealing mechanism of the bag making and packaging machine according to claim 3 is
In a bag making and packaging machine that performs tubular forming and horizontal packaging and sealing of a band-shaped packaging material in parallel with a filling operation of an article to be packaged, a pair of horizontal sealing mechanisms for performing horizontal packaging and sealing on the packaging material are provided. The sealing mechanism is
A seal preparation mechanism that sandwiches the vicinity of the horizontal packaging sealing portion of the packaging material, the seal preparation mechanism includes an auxiliary tool that sandwiches the packaging material, and a movable support mechanism that supports the auxiliary tool so as to be able to advance and retreat in the direction of inserting the packaging material. An absorption mechanism for displacing the auxiliary tool obliquely with respect to a sandwiching surface of the auxiliary tool in accordance with a biased load applied to the auxiliary tool is provided.

The pair of horizontal sealing mechanisms are driven by a driving mechanism to perform horizontal packaging and sealing of the packaging material. Each horizontal sealing mechanism
A seal preparation mechanism for sandwiching the vicinity of the horizontal packaging sealing portion of the packaging material is provided. The seal preparation mechanism includes an auxiliary tool for sandwiching the packaging material, a movable support mechanism for supporting the auxiliary tool so as to be able to advance and retreat in the sandwiching direction, and an auxiliary tool. An absorbing mechanism for displacing the auxiliary tool obliquely with respect to the sandwiching surface of the auxiliary tool in accordance with the applied eccentric load, so that the auxiliary tool is moved by the movable support mechanism prior to the horizontal packaging sealing by the horizontal sealing mechanism. By sandwiching the packaging material in the sandwiching direction, a seal is prepared so that the article to be packaged is not sandwiched in the horizontal packaging sealing portion.

When the object to be packaged is caught at one end in the length direction of the auxiliary tool when the auxiliary tool is pinched, and an unbalanced load acts on one end of the auxiliary tool, the auxiliary tool is provided with an absorbing mechanism. As a result, the auxiliary tool is not restrained at a right angle to the pinching direction, but is displaced obliquely with respect to the pinching surface of the auxiliary tool. Durability can be increased.

Here, the movable support mechanism includes an urging member for urging the assisting tool toward the advance side, and a connecting rod guided and supported so as to be able to advance and retreat in the sandwiching direction, and the absorbing mechanism assists the connecting rod. In the case of a link mechanism rotatably coupled to the tool (claim 4 dependent on claim 3), the relative position of the connecting rod and the assisting tool at the connecting portion of the connecting rod and the assisting tool via the link mechanism. The degree of freedom of movement is increased, and the assisting tool is not restrained at a right angle to the connecting rod. That is, the auxiliary tool can smoothly move with respect to the movable support mechanism without the connecting rod being in a self-locking state. Therefore, the auxiliary tool does not rattle, and the rattling does not cause abnormal wear. Other effects are the same as those of the third aspect.

Here, the seal preparing mechanism includes an auxiliary tool for sandwiching the packaging material, a movable support mechanism for supporting the auxiliary tool so as to be able to advance and retreat in the direction of sandwiching the packaging material, and an auxiliary tool in accordance with an eccentric load applied to the auxiliary tool. In the case where an absorption mechanism for displacing the auxiliary tool obliquely with respect to a sandwiching surface of the auxiliary tool is provided (claim 5 depending on claim 1 or 2), the seal preparation mechanism includes an auxiliary tool for sandwiching the packaging material. A movable support mechanism that supports the auxiliary tool so as to be able to advance and retreat in the sandwiching direction, and an absorption mechanism that displaces the auxiliary tool obliquely with respect to a sandwiching surface of the auxiliary tool in accordance with an uneven load applied to the auxiliary tool. Therefore, prior to the horizontal packaging sealing by the horizontal sealing mechanism, the auxiliary tool sandwiches the packaging material in the sandwiching direction by the movable support mechanism, thereby preparing a seal so that the article to be packaged is not sandwiched in the horizontal packaging sealing portion. .

When the packaged object bites at one end of the auxiliary tool in the longitudinal direction and a partial load acts on one end of the auxiliary tool when the auxiliary tool is pinched by the auxiliary tool, the auxiliary tool is provided with an absorbing mechanism. As a result, the auxiliary tool is not restrained at a right angle to the pinching direction, but is displaced obliquely with respect to the pinching surface of the auxiliary tool. Durability can be increased. Other operations are the same as those of the first or second aspect.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the shutter plate mechanism 55 having the shutter plate can be detached in a one-touch manner so that the shutter plate smoothly moves forward and backward even when the packaged object is bitten and an uneven load is applied to the shutter plate. It is an example when the present invention is applied to a horizontal sealing mechanism of a vertical pillow bag making and packaging machine described above. This vertical pillow bag making and packaging machine (not shown) is configured such that a band-shaped packaging material (film) is bent into a cylindrical shape by a former, heat-sealed in a vertical direction at a joining portion of the cylindrical packaging material, and then potatoes. The horizontal packaging and sealing by a pair of horizontal sealing mechanisms are performed continuously in parallel with the filling operation of the packaged object such as chips and snacks.

As shown in FIGS. 5 and 7, in the vertical pillow bag making and packaging machine, the back side horizontal sealing mechanism 51A and the front side horizontal sealing mechanism 51B are inwardly directed to each other in a so-called side view substantially D-shape. The swivel drive mechanism 35 for swiveling in the form of a circle is described. However, since the turning drive mechanisms 35 of the horizontal seal mechanisms 51A and 51B have the same configuration, the turning drive mechanism 35 on the back side will be described. As shown in FIG. 6, a pair of support blocks 37 are provided near the distal ends of the pair of left and right swing arms 38, respectively. It is mounted so as to be relatively rotatable, and both ends of the coupling shaft 36 are respectively fitted and fixed to the support block 37,
The distal ends of the pair of turning arms 38 are connected to a pair of support blocks 37 via a coupling shaft 36 so as to be synchronously rotatable. The base end of the left swing arm 38 is fixed to a support shaft 40 rotatably mounted on a left movable frame 39, and the base end of the right swing arm 38 is an input shaft 41 rotatably mounted on a right movable frame 39. It is fixed to.

As shown in FIG. 6, a pair of pivot arms 38
The following planetary gear mechanism is provided in order to hold the horizontal seal mechanisms 51A and 51B in the upward position when the. A planetary gear 42 is externally fitted and fixed to the left support block 37, and an idler 44 that meshes with the planetary gear 42 via a pivot shaft 43 is pivotally mounted at an intermediate portion of the revolving arm 38, and is fixed to the support shaft 40. The fixed shaft 45 has an idler 44
, A sun gear 46 is fixed. On the other hand, a drive shaft 4 connected to a drive motor (not shown) for turning the arm.
7 is connected to an outer disk 48a of a well-known Schmitt coupling mechanism 48 including three disks 48a, 48b and 48c connected via a connecting link (not shown), and the input shaft 41 is connected to the inner disk 48c. It is connected to.

By the Schmitt coupling mechanism 48, even if the position of the axis of the input shaft 41 with respect to the drive shaft 47 fluctuates, the rotational speed and the drive torque do not fluctuate.
The driving force of the drive shaft 47 can be transmitted to the input shaft 41. Therefore, the left and right revolving arms 38 are pivoted about the support shaft 40 and the input shaft 41 as a center of rotation, and the left and right movable frames 39 are synchronized, so that the horizontal sealing mechanisms 51A and 51B move back and forth so as to approach and separate from each other. In the direction, and as shown in FIG.
In the ironing process and the horizontal sealing process, the turning can be performed in a substantially D-shape in a side view as a straight path. By the action of the planetary gear mechanism, the horizontal seal mechanisms 51A and 51B revolve around the sun gear 46 while maintaining a horizontal attitude in synchronization with the turning of the left and right turning arms 38.

Next, a pair of horizontal sealing mechanisms 51A, 51B
Will be described. However, the horizontal sealing mechanisms 51A, 51B
Has the same configuration, so the rear side horizontal sealing mechanism 51A will be described. As shown in FIG. 5, the horizontal sealing mechanism 51A
Are a horizontal seal jaw 52 for performing horizontal packaging sealing, an ironing plate 53 below the horizontal seal jaw 52 and a support mechanism 54 thereof.
And the upper shutter plate 55 of the horizontal seal jaw 52.
A shutter plate mechanism 55 having A (this corresponds to a seal preparation mechanism), a shutter plate support mechanism 56, and the like are provided. Here, the shutter plate 55A and the ironing plate 53 correspond to an auxiliary tool.

As shown in FIG. 5, the horizontal sealing jaws 52 are formed in the first half of the sealing jaws 5 for sealing the horizontal packaging in an uneven shape.
2a and a rear heater block 52b having a heater (not shown) for heating. Seal jaw 52a
A not-shown cutter is disposed in the middle recessed portion, and a pair of front and rear transverse seal jaws 52 are pressed to face each other in the transverse sealing step shown in FIG. As a result, packaging material 7
Is formed at a predetermined position, and the middle portion in the height direction of the horizontal packaging sealing portion is cut by a cutter, and the packaged object 8 is cut.
Are sequentially formed at a high speed of 100 or more per minute.

The lateral seal jaws 52 are fixedly supported at both left and right end portions by a pair of left and right support blocks 37, and the pair of support blocks 37 are integrally connected by a connecting plate 49 extending in the left and right direction. I have. An ironing plate 53 wider than the lateral seal jaws 52 has a substantially tapered shape that becomes thinner toward the tip, and is supported below the support block 37 by a support mechanism 54 so as to be able to advance and retreat in a sandwiching direction that is the front-rear direction. .

The support shaft 5 connected to the rear end of the ironing plate 53
4a is partially fitted into the mounting block 54b fixed to the lower side of the support block 37, and the squeezing plate 53 is elastically attached to the advance side (the side seal mechanism 51B side) by the compression coil spring 54c provided on the support shaft 54a. It is being rushed. Therefore, at the start of the ironing process, the pair of front and rear ironing plates 53 are pressed in opposition to move downward while sandwiching the packaging material 7 from the front and rear, so that the packaged object 8 in the packaging material 7 is moved downward. The horizontal wrapping seal is then sealed.

Next, the shutter plate mechanism 55 and the shutter plate support mechanism 56 will be described. As shown in FIGS. 1 to 5, the shutter plate 55 </ b> A, which is wider than the horizontal seal jaw 52, is separated into the connecting plate 49 by the shutter plate supporting mechanism 56 via the movable substrates 65 and 66 and the fixed substrate 79. The movable support mechanism 62 is elastically urged by a movable support mechanism 62 so as to be able to advance and retreat a predetermined distance in the front-rear direction perpendicular to the linear locus portion. The shutter plate 55A is formed of a substantially rectangular thin plate that is elongated in the left-right direction, and its front end is formed in a substantially U-shape in side view.
In a, a plurality of (for example, six) openings 55b are formed at predetermined intervals.

However, a plurality of (for example, five) openings 55b are formed in the shutter plate 55B facing the shutter plate 55A at predetermined intervals and in a zigzag manner with respect to the openings 55b of the shutter plate 55A. . Rod-shaped buffer members 57 made of, for example, urethane rubber are attached to the left and right ends of the shutter plate 55A via rubber attachment blocks 58, and fixed blocks 59 are attached to the left and right ends of the other shutter plate 55B. Position adjustment bolt 6
0, and the gap δ between the shutter plates 55A and 55B can be adjusted by the position adjusting bolt 60 during the shutter operation of holding the packaging material 7 from front and rear.

Next, the shutter plate supporting mechanism 56 will be described. As shown in FIGS. 1 to 5, the shutter plate support mechanism 56 supports the shutter plate 55A so as to be able to advance and retreat a predetermined distance in the front-rear direction orthogonal to the linear trajectory portion, and elastically biases the biasing member. It has a support mechanism 62. The movable support mechanism 62 includes a support substrate 65 and a base substrate 66 supported at the distal end of the revolving arm 38 via a support member, and a parallel support for supporting the shutter plate 55A on the support substrate 65 and the base substrate 66 so as to be able to advance and retreat. Urging the shutter plate 55A toward the advancing side with respect to the pair of connecting rods 67 oriented in the front-rear direction and the support substrate 65 and the base substrate 66;
One compression coil spring 75 (corresponding to an urging member) is provided.

An elongated support substrate 65 is provided on the rear side of the shutter plate 55A in the left-right direction, and a base substrate 66 is fixed to a central portion on the rear side of the support substrate 65.
At both left and right end portions of the base substrate 66, linear bearings 68 for guiding the rear portions of the pair of left and right connecting rods 67 so as to be movable back and forth are respectively incorporated. A pair of pivot blocks 69 corresponding to the pair of connecting rods 67 are fixed to the lower surface of the upper wall portion 55c of the shutter plate 55A, and the distal end portions of the pair of connecting rods 67 are connected via vertical connecting pins 70. And is pin-connected to a pair of pivot blocks 69.

The right connecting pin 70 is mounted in a round pin hole 55e formed in the pivot block 69 and the upper wall 55c, and the left connecting pin 70 is formed in the pivot block 69 and the upper wall 55c. The shutter plate 55A is attached to a pin hole 55d that is long in the length direction. That is, according to the unbalanced load applied to the shutter plate 55A, the shutter plate 5
5A can be displaced obliquely in a plan view with respect to a sandwiching surface, which is the front surface of the shutter plate 55A. That is,
A structure in which these pin holes 55d and 55e, the connecting pin 70, the pivot block 69 and the like are connected as a link mechanism corresponds to an absorbing mechanism.

At the rear end of each connecting rod 67, a locking member 71 is provided.
Are fixed by bolts 72, and the stopper 71 is received by the base board 66, whereby the advance limit position of the connecting rod 67 is set. Three spring support shafts 73 projecting forward from the support substrate 65 are fixed to the support substrate 65, and three rectangular cylinders 74 are provided on the shutter plate 55 </ b> A so as to correspond to the spring support shafts 73. The distal end portion of the compression coil spring 75 provided outside the housing 73 is accommodated in the rectangular tube 74, and the shutter plate 55A is
5 is elastically urged forward.

Next, the fixed substrate 79 and the shutter plate attaching / detaching mechanism 77 for detachably engaging and connecting the fixed substrate 79 and the movable substrates 65 and 66 will be described. Figure 1
As shown in FIG. 5, a holding groove 66a is formed at the upper end of the central portion of the base substrate 66, and the upper surface of the latter half of the holding groove 66a has a lid plate 78 fixed to the upper surface of the base substrate 66.
It is closed by. A fixed side substrate 79 is provided at the center of the connecting plate 49.
Is fixed at the upper end of the fixed-side substrate 79.
A connecting engaging plate 79a extending horizontally forward is formed, and the connecting engaging plate 79a is formed to be detachably engaged with the holding groove 66a with almost no gap.

In the vicinity of the front end of the coupling engagement plate 79a, an engagement slit 79b is formed in the left-right direction which engages with an eccentric cam 82 described later. Here, the holding groove 6
The base substrate 66 on which 6a is formed corresponds to a holding material. Next, the lock mechanism 80 that allows the connecting engagement plate 79a to move in the engagement direction and prohibits disengagement will be described.

As shown in FIGS. 1 to 5, the base substrate 66
A pair of left and right L-shaped fittings 81 corresponding to the left end and the right end of the holding groove 66a are fixed on the upper surface of the eccentric cam 82, and an eccentric cam 82 having a circular cross section is disposed between these L-shaped fittings 81. , A pivot bolt 83 is inserted and fixed at a position eccentric rearward and upward from the axis thereof, and left and right ends of the pivot bolt 83 are pivotally supported by left and right L-shaped brackets 81. ing. The lower end of the eccentric cam 82 engages with the engagement slit 79b of the coupling engagement plate 79a, so that the coupling engagement plate 79a can be locked.

A spring receiving bolt 84 is fixed to a portion eccentric forward and downward from the axis of the eccentric cam 82, and the cover plate 7
8 and a spring receiving bolt 8 formed integrally with the spring 8
4, the compression coil spring 85 is stretched, and the eccentric cam 82 is urged counterclockwise in FIG. 3 (that is, in the locking direction L). Therefore, the connecting engagement plate 79a is inserted into the holding groove 6
Although the movement in the direction engaging with 6a is permitted, the engagement plate 79a for connection is locked so as not to be disengaged from the holding groove 66a. However, excessive rotation of the eccentric cam 82 in the locking direction L is restricted by the contact of the eccentric cam 82 with the front end of the cover plate 78.

Next, the lock release mechanism 87 for releasing the lock of the lock mechanism 80 will be described. As shown in FIGS. 1, 2 and 5, the front end of the unlock plate 88 facing in the front-rear direction is connected to the spring receiving bolt 84 and the unlock plate 8
An operation unit is formed at the rear end of the unit 8. By pushing this unlocking plate 88 forward with a finger, the unlocking plate 8
8 and the spring receiving bolt 84, the eccentric cam 82 rotates in the unlocking direction UL, and the eccentric cam 82 and the engaging slit 7
9b is released. In other words, the lock of the lock mechanism 80 is released, and the components such as the base board 66 and the shutter plate 55A accompanying the base board 66 can be removed from the fixed side board 79 forward.

Next, the operation of the horizontal sealing mechanism 51A described above will be described. First, when the shutter plate mechanism 55 having the shutter plate 55A is mounted, the holding groove 6
The base board 66 is moved backward with the 6a corresponding to the engagement plate 79a. Thereby, the engaging plate 79a for connection is engaged with the holding groove 66a, and the shutter plate mechanism 55 can be mounted in a one-touch manner. At this time,
Since the pressing position where the eccentric cam 82 abuts on the front end of the connecting engagement plate 79a is located on the front side of the pivoting position of the pivoting bolt 83, the eccentric cam 82 resists the spring force of the compression coil spring 85. The eccentric cam 82 and the engagement slit 79b are engaged with each other while rotating in the unlocking direction UL, so that the locked state can be easily achieved.

That is, the disengagement can be reliably inhibited by the wedge action. Even if vibration or the like is applied during the operation of the bag making and packaging machine, the spring force of the compression coil spring 85 is applied. There is no slack. When the shutter plate mechanism 55 is to be detached, for example, when cleaning the shutter plate 55A, the eccentric cam 82 is moved in the unlock direction UL by pushing the operating portion of the unlock plate 88 forward with a finger as described above. By rotating, the engagement between the eccentric cam 82 and the engagement slit 79b is released, and the shutter plate mechanism 55 can be easily removed forward in a one-touch manner.

Therefore, when cleaning or replacing the shutter plate 55A, the shutter plate mechanism 5 having the shutter plate 55A can be easily attached and detached in a one-touch manner, and the time for attaching and detaching the shutter plates 55A and 55B can be shortened. In addition, the workability of replacing and cleaning the shutter plates 5A and 5B can be improved, and the production efficiency can be improved.

On the other hand, during the operation of the bag making and packaging machine, the arm rotating drive motor is driven to rotate at a predetermined rotation speed, and the left and right movable frames of the front and rear horizontal sealing mechanisms 51A, 51B are synchronized with the rotation. When the two sets of front and rear revolving arms of the horizontal seal mechanisms 51A and 51B rotate inward in synchronization with each other, the pair of horizontal seal mechanisms 51A and 51B
A and 51B revolve in a D-shape having a linear locus portion.

Therefore, a pair of horizontal sealing mechanisms 5 opposed to each other
As shown in FIG. 7, the shutters 1A and 51B gradually approach along the transfer path of the packaging material 7 by the start of the ironing process.
5A and 55B are a buffer member 57 and a position adjusting bolt 60;
Approaching the position where they come into contact with each other, and sandwich the packaging material 7 filled with the packaged object 8 from the front-back direction. The elastically urged ironing plate 53 also presses and holds the packaging material 7 in the front-rear direction. At this time, a predetermined gap δ is provided between the shutter plates 55A and 55B.
Are provided, and openings 55b of the shutter plates 55A and 55B are provided.
Are arranged in a zigzag shape in plan view, so that the packaging material 7 is sandwiched in a zigzag shape (see FIG. 2).

Here, the pair of connecting rods 67 are disposed apart from each other in the left-right direction, and the three compression coil springs 75 urge the vicinity of the left and right ends and the center of the shutter plate 55A. The posture of the shutter plate 55A can be stabilized by fully utilizing the spring force of the coil spring 75, and the posture of the shutter plate 55A at the time of forward and backward movement can be also stabilized.

In this state, when the ironing process is started, the packaged object 8 falling from above is moved by the shutter plates 55A, 55A.
B is securely shut off, and the article to be packaged 8 at the position of the horizontal package sealing portion is ironed down by a pair of ironing plates 53. At this time, both shutter plates 55A, 55
The nitrogen gas in the packaging material 7 sealed by the sandwiching by B can be released to the outside through the gap δ.
Next, at the start of the horizontal sealing process, the horizontal sealing mechanism 5
1A and 51B further approach the advancing side, and by the end of the horizontal sealing process, the pair of horizontal sealing jaws 52 sandwiches the packaging material 7 from the front and rear in a pressing manner and seals the horizontal packaging in a horizontal packaging sealing portion having a predetermined width. Is applied.

The horizontal wrapping sealing portion includes an upper end sealing portion of the lower bag filled with the packaged object 8 and a lower end sealing portion of the next upper upper bag to be filled with the packaged object 8. Therefore, at the end of the horizontal sealing step, the middle position of the horizontal packaging sealing portion is cut by a cutter (not shown), and the finished product is cut off.

Here, as shown in FIG. 8, even if an eccentric load W is applied to the right end of the shutter plate 55A by biting the packaged object 8 or the like, the distal end of each connecting rod 67 is vertical. The shutter plate 55A is connected to the shutter plate 55A by the connecting pin 70 and one of the pin holes is formed as a long hole extending in the left-right direction.
As shown in FIG. 8, the shutter plate 55A can be freely inclined with respect to the sandwiching surface of the shutter plate 55A from a positional relationship perpendicular to the shutter plate 55A. Therefore, the shutter plate 55A is not damaged and the connecting rod 67 is not subjected to an abnormal frictional force, so that the connecting rod 67 can smoothly move forward and backward, and the shutter plate 55A can also smoothly move forward and backward.

Therefore, even when the eccentric load W repeatedly acts on the shutter plate 55A, abnormal frictional resistance acts on the connecting rod 67 and does not rattle. Wear will not occur,
Breakage of the shutter plate 55A can be prevented, and durability can be improved.

Next, a description will be given of a modification in which the embodiment is partially modified. 1) Instead of the eccentric cam 82, a locking lever pivotally supported by a pivot bolt 83 and extending forward is used, or a cylindrical engaging portion that engages with the engaging slit 79b at the tip of the locking lever. For example, various eccentric members having a wedge action can be used. 2] The pin hole 55e for the connecting pin 70 for connecting the right connecting rod 67 to the shutter plate 55A may be formed as a long hole in the left-right direction.

3] As shown in FIG. 9, the base substrate 66C
A holding groove 79d for fixing the front end of the connecting engagement plate 90 facing rearward to the support substrate 65C corresponding to the upper side immediately above, and detachably engaging the connection engagement plate 90 with the fixed-side substrate 79C.
And a horizontal seal mechanism 51C provided with a lock mechanism similar to the lock mechanism 80 and a lock release mechanism similar to the lock release mechanism 87 described above. Also in this case, the shutter plate mechanism having the shutter plate 55A can be easily attached and detached in a one-touch manner. 4) The present invention can be applied so that the ironing plate mechanism having the ironing plate 53 described above can be detached. Further, the present invention can be applied to various horizontal sealing mechanisms provided in various bag making and packaging machines.

[0053]

According to the first aspect of the present invention, since the attachment / detachment mechanism includes the coupling engagement plate, the holding member, the lock mechanism and the lock release mechanism, the coupling engagement plate provided on the side seal mechanism side. Only by engaging with the holding material on the seal preparation mechanism side,
The holding material can be locked in the engaged state by the lock mechanism, and the engagement of the connecting engagement plate can be easily released by the lock release mechanism, and the one-touch seal preparation mechanism having a packaging auxiliary tool such as a shutter plate or an ironing plate can be used. It can be attached and detached with a formula. Therefore, the time for attaching and detaching the seal preparation mechanism can be shortened, the workability for replacing and cleaning the seal preparation mechanism can be improved, and in addition, the production efficiency can be improved.

According to the second aspect of the present invention, since the attachment / detachment mechanism includes the coupling engagement plate, the holding member, the lock mechanism and the lock release mechanism, the coupling engagement plate provided on the seal preparation mechanism side can be horizontally moved. Just by engaging the holding member on the seal mechanism side, the holding member can be locked in the engaged state by the lock mechanism, and the engagement of the connecting engagement plate can be easily released by the lock release mechanism, and the shutter plate and the ironing plate The seal preparation mechanism having a packaging auxiliary tool such as described above can be attached and detached with a single touch. Therefore, the time for attaching and detaching the seal preparation mechanism can be reduced,
The replacement workability and the cleaning workability of the seal preparation mechanism can be improved, and in addition, the production efficiency can be improved.

According to the third aspect of the present invention, the seal preparation mechanism includes an auxiliary tool for sandwiching the packaging material, a movable support mechanism for supporting the auxiliary tool so as to be able to advance and retreat, and the auxiliary tool on the sandwiching surface of the auxiliary tool. Before the horizontal packaging is sealed by the horizontal sealing mechanism, the auxiliary tool pushes the packaging material in the sandwiching direction with the movable support mechanism before the horizontal packaging is performed by the horizontal sealing mechanism. A seal can be prepared so as not to be caught in the sealing portion. When pinching with the aid,
In the case where the packaged object bites at one end in the length direction of the auxiliary tool and an eccentric load is applied to one end of the auxiliary tool, the auxiliary tool is moved by the absorbing mechanism so as to be perpendicular to the pinching direction. Instead of being restrained, the auxiliary tool is displaced obliquely with respect to the sandwiching surface of the auxiliary tool, so that the auxiliary tool such as a shutter plate and an ironing board is not damaged, and the durability of the auxiliary tool can be increased.

According to the fourth aspect of the present invention, the movable support mechanism includes a biasing member and a connecting rod that is guided and supported so as to be able to move forward and backward, and the absorbing mechanism is a link mechanism. This increases the degree of freedom of the relative movement between the connecting rod and the auxiliary tool at the connecting portion between the connecting rod and the auxiliary tool, and the auxiliary tool is not restrained at a right angle to the connecting rod.
The auxiliary tool can smoothly move with respect to the movable support mechanism without the connecting rod being in a self-locking state. Therefore, the auxiliary tool does not rattle and the rattling does not cause abnormal wear, and the durability of the auxiliary tool can be increased. Other effects similar to those of the third aspect can be obtained.

According to the fifth aspect of the present invention, the seal preparation mechanism includes an auxiliary tool for holding the packaging material, a movable support mechanism for supporting the auxiliary tool so as to be able to advance and retreat, and the auxiliary tool on the sandwiching surface of the auxiliary tool. Before the horizontal packaging by the horizontal sealing mechanism, the auxiliary tool presses the packaging material in the sandwiching direction by the movable support mechanism, because it has an absorption mechanism that displaces the packaging material.
A seal can be prepared so that the article to be packaged is not pinched by the horizontal package sealing portion. When the packaged object is caught at one end in the length direction of the auxiliary tool when the auxiliary tool is pinched, and an uneven load is applied to one end of the auxiliary tool, the auxiliary tool is pinched by the absorbing mechanism. Rather than being restrained at a right angle to the direction, it is displaced obliquely with respect to the sandwiching surface of the auxiliary tool, so that the auxiliary tool such as a shutter plate and an ironing board is not damaged, and the durability of the auxiliary tool is improved. Can be enhanced. The other effects are the same as those of the first or second aspect.

[Brief description of the drawings]

FIG. 1 is a perspective view of a horizontal sealing mechanism according to an embodiment of the present invention.

FIG. 2 is a plan view of the horizontal sealing mechanism of FIG.

FIG. 3 is a vertical sectional side view taken along line LL of FIG. 2;

FIG. 4 is a rear view of the horizontal seal mechanism.

FIG. 5 is a vertical sectional side view of a main part of a pair of horizontal seal mechanisms.

FIG. 6 is a vertical sectional front view of a main part of the turning drive mechanism.

FIG. 7 is an operation diagram showing an ironing step and a horizontal sealing step.

FIG. 8 is a diagram corresponding to FIG. 2 when an eccentric load is applied.

FIG. 9 is a diagram corresponding to FIG. 2 according to a modified embodiment.

[Explanation of symbols]

 51A, 51B Horizontal seal mechanism 55 Shutter plate mechanism 55A, 55B Shutter plate 55d, 55e Pin hole 62 Movable support mechanism 66 Base substrate 67 Connecting rod 70 Pivot pin 75 Compression coil spring 77 Shutter plate attaching / detaching mechanism 79 Fixed side substrate 80 Lock mechanism 82 Eccentric cam 87 Lock release mechanism 88 Lock release plate

Claims (5)

[Claims] 1. A pair of horizontal seals for performing horizontal packaging and sealing of the packaging material in a bag making and packaging machine that performs tubular forming and horizontal packaging and sealing of a belt-shaped packaging material in parallel with a filling operation of an article to be packaged. A mechanism is provided, wherein each of the horizontal seal mechanisms includes a seal preparation mechanism that sandwiches the vicinity of the horizontal packaging sealing portion of the packaging material, and a detachment mechanism that detachably supports the seal preparation mechanism on the horizontal seal mechanism. A connecting plate connected to the side seal mechanism side and capable of engaging with the seal preparing mechanism; a holding member formed on the seal preparing mechanism side so as to detachably engage the connecting engaging plate; And a lock release mechanism for releasing the lock of the lock mechanism. 2. A pair of horizontal seals for performing horizontal packaging and sealing of the packaging material in a bag making and packaging machine that performs tubular forming and horizontal packaging and sealing of a belt-shaped packaging material in parallel with a filling operation of an object to be packaged. A mechanism is provided, wherein each of the horizontal seal mechanisms includes a seal preparation mechanism that sandwiches the vicinity of the horizontal packaging sealing portion of the packaging material, and a detachment mechanism that detachably supports the seal preparation mechanism on the horizontal seal mechanism. A coupling engagement plate connected to the seal preparation mechanism side and engageable with the horizontal seal mechanism; a holding member formed on the horizontal seal mechanism side so as to detachably engage the connection engagement plate; And a lock release mechanism for releasing the lock of the lock mechanism. 3. A pair of horizontal seals for performing horizontal packaging and sealing on the packaging material in a bag making and packaging machine that performs tubular forming and horizontal packaging and sealing of a band-shaped packaging material in parallel with a filling operation of an object to be packaged. A mechanism is provided, wherein each of the horizontal sealing mechanisms includes a seal preparation mechanism for sandwiching the vicinity of the horizontal packaging sealing portion of the packaging material, and the seal preparation mechanism includes an auxiliary tool for sandwiching the packaging material and the auxiliary tool for sandwiching the packaging material. A movable support mechanism that supports the auxiliary tool so as to be able to advance and retreat in a direction, and an absorption mechanism that displaces the auxiliary tool obliquely with respect to a sandwiching surface of the auxiliary tool in response to a bias load applied to the auxiliary tool. Horizontal sealing mechanism for bag making and packaging machines. 4. The movable support mechanism includes an urging member for urging the assisting tool toward the advance side, and a connecting rod guided and supported so as to be able to advance and retreat in a sandwiching direction, and the absorbing mechanism includes the connecting rod. 4. A horizontal sealing mechanism for a bag making and packaging machine according to claim 3, wherein said mechanism is a link mechanism rotatably connected to said auxiliary tool. 5. The seal preparation mechanism comprises: an auxiliary tool for sandwiching a packaging material; a movable support mechanism for supporting the auxiliary tool so as to be able to advance and retreat in a direction in which the packaging material is sandwiched; 3. The horizontal sealing mechanism for a bag making and packaging machine according to claim 1, further comprising an absorbing mechanism for displacing the auxiliary tool obliquely with respect to a sandwiching surface of the auxiliary tool.