JP2957317B2 - Vertical pillow packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical pillow packaging machine characterized by a mechanism for adjusting the position of a packaging material transferring means and a vertical sealing means.

[0002]

2. Description of the Related Art A belt-shaped thermoplastic material is wound around a peripheral surface of a filling cylinder while bending a homer into a cylindrical shape. A vertical pillow wrapping machine in which a horizontal sealing heater is used to horizontally seal each bag while filling the contents, etc. is usually used to sequentially pull out the packaging material to a certain length. A pair of pull-down belts and a vertical seal belt for sealing a vertical joint are used.

The pair of pull-down belts and vertical seal belts are designed so that the distance from the center can be changed by an air cylinder or a mechanical handle in case of changing the size of a bag or setting a packaging material. However, such a mechanism has a problem that it is difficult to adjust the pressing force against the packaging material, and in particular, in a tubeless structure that does not use a cylinder, some positioning means is required. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new vertical pillow packaging machine capable of equally adjusting the position of the packaging material transfer means and the vertical sealing means according to the size of the packaging material.

[0005]

That is, the present invention provides a vertical pillow wrapping machine for achieving the above-mentioned object, which holds the surface of a tube-shaped wrapping material in a frictional manner and horizontally wraps the wrapping material. At least two sets of transfer means towed toward the sealing means and longitudinal sealing means for sealing joints of the packaging material can be expanded and contracted in the radial direction while cooperating with each other by the position adjusting means.

[0006]

Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of the present invention. In the drawing, reference numerals 1 and 1 denote packing material transfer means disposed in a radial direction along a peripheral surface of a cylinder (not shown), that is, a pair of pull-down belts, and a driven pulley which stretches these belts 1 and 1 2 and the driving pulley 7, the shafts 3, 3 of the driven pulleys 2, 2 are movable bearings 4, 4, respectively.
These bearings 4 and 4 are driven by a position adjusting servomotor 5 to rotate.
That is, it is screwed into the right-hand thread portion and the left-hand thread portion of the turn buckle 6, respectively, and is configured such that the position adjusting servomotor 5 can arbitrarily change and adjust the interval between the pull-down belts 1, 1.

On the other hand, the shafts 8, 8 of the respective drive pulleys 7, 7 are connected to the drive shafts 10, 10 via Schmitt coupling mechanisms 9, 9, and the drive shafts 1,
The reference numerals 0 and 10 are connected to each other via two idlers 12 and 13 by a belt driving servomotor 11 so as to rotate inward each other. The above-described Schmitt coupling mechanism 9 is capable of transmitting the driving force from one to the other without moving the rotation angle or fluctuating the transmission torque even if the mutual axes are moved in the direction perpendicular to the axis. The Schmitt coupling mechanism 9 can be a well-known driving force transmission mechanism.
Are three disks 9 connected by a link (not shown).
a, 9b, 9C, the first disc 9a of which
Is connected to the drive pulley shaft 7, and the third disk 9c is connected to the drive shaft 10.

On the other hand, reference numeral 15 in the drawing denotes a vertical sealing means for sealing the overlapped vertical edges of the band-shaped packaging material wound around the cylinder, that is, a vertical seal belt. Of the driven pulley 16 and the drive pulley 20, the shaft 17 of the driven pulley 16 is supported by a movable bearing 18, and the bearing 18 is connected to a shaft end of the turnbuckle 6 via a not-shown bevel gear. The vertical seal belt 15 together with the pair of pull-down belts 1 and 1 can be radially moved with respect to the center axis of the cylinder by being screwed to the coupled screw shaft 19.

On the other hand, a shaft 21 of the pulley 20 for driving the vertical seal belt is connected to a drive shaft 23 via a Schmitt coupling 22. The drive shaft 23 connects bevel gears 25 and 26 in a gear box 24. Via intermediate shaft 2
7, the intermediate shaft 27 is connected to the other intermediate shaft 29 via a universal joint 28, and is also fixed to the pulley 14 fixed to the drive shaft 10 of the pull-down belts 1 and 1, and is stretched over the pulley 14. It is configured to be driven by the belt driving servomotor 11 through the timing belt 30 thus set. Although not shown, the universal joint 28 of the screw shaft 19 described above is used.
A universal joint is provided in a portion corresponding to the above, and the vertical seal belt 15 can be rotated in the expanding direction with the universal joint 28 as a fulcrum.

In the thus constructed apparatus, when the position adjusting servomotor 5 is rotated, the turnbuckle 6 and the screw shaft 1 connected thereto via a bevel gear are turned.
9 rotate together, and each of the bearings 4, 4, 1
The pair of pull-down belts 1 and 1 and the vertical seal belt 15 are moved in the radial direction with respect to the center axis of the filling cylinder via 8, and the positioning thereof is adjusted to a position corresponding to the size of the packaging material.

Then, when the servo motor 11 for driving the belt is operated in this state, the idlers 12 and 13 are driven.
The drive shafts 10 and 10 are connected via the Schmitt coupling mechanisms 9 and 9 despite the fact that the drive pulley shafts 8 and 8 are misaligned by the belt positioning operation. Thus, the required driving force is transmitted to the driving pulley shafts 8, 8 without changing the torque, and the pull-down belts 1, 1 are driven at the same speed, and the tubular packaging material is pulled downward.

At the same time, the intermediate shafts 29 and 27 which have received the driving force from the pulley 14 on the pull-down belt driving shaft 10 via the timing belt 30 are moved to the bevel gear 2.
This driving force is transmitted to the driving shaft 23 which is connected via 5, 5 and the driving pulley shaft 21 having a different axial center is further rotated by the Schmitt coupling 22 from there.
The vertical seal belt 15 stretched on the pulley 20 is run at the same speed as the pull-down belts 1 and 1 to seal the vertical edges of the stacked packaging materials.

On the other hand, when it is necessary to set a new packaging material or to correct the positional deviation of the packaging material, first, the servo motor 5 for adjusting the belt position is reversed, and
The pair of pull-down belts 1 and 1 and the vertical seal belt 15 are moved in a direction to separate from the filling cylinder. Then, a lock mechanism (not shown) is released, and the vertical seal belt 15 is extended from the peripheral surface of the filling cylinder around the universal joint 28 as a fulcrum. The evacuation is performed, and a new setting of the packaging material or an adjustment of the displacement is performed.

In the embodiment shown in FIG. 2, a pair of bearings 34, 34 are screwed onto a turnbuckle 36 driven by a servomotor 35 for position adjustment.
The shafts 33, 33 of the pull-down rollers 31, 31 are rotatably supported by 34, and the drive shafts 40, 40 are coupled to the shafts 33, 33 via Schmitt coupling mechanisms 39, 39. .

In this embodiment, instead of the pull-down belt, the wrapping material is transported by a continuous roller 31. In particular, several rollers connected to rotate at a constant speed by a belt 32 are used. By arranging 31 along the peripheral surface of the filling cylinder, it is possible to smoothly transfer the cylindrical packaging material to the horizontal sealing heater while gradually flattening it.

On the other hand, FIG. 3 shows another embodiment of the present invention which is constructed so as to be able to respond to a case where it is necessary to stop the transfer of the packaging material for some reason or to correct the displacement of the packaging material. This is an example.

This device includes a pair of pull-down belts 5.
The drive pulleys 57, 57 for driving the vertical seal belt 65, while the drive pulleys 57, 57 for driving the vertical seal belt 65 are coupled directly or via separate Schmitt coupling mechanisms 59 to the respective servomotors 61, 61 for driving the belts. 70 is connected to another belt driving servomotor 62 directly or via a Schmitt coupling mechanism 72.

Further, in this device, one side of the emergency pressing release cylinders 73, 73 is attached to the turnbuckle 56 at the right and left thread portions of the turnbuckle 56 for adjusting the pull-down belts 51, 51, respectively. Threaded in parallel with the brackets 74, 7
Each of the shafts 53, 53 of the driven pulleys 52, 52, which stretch the pull-down belts 51, 51, is supported on the bearings 54, 54 mounted via the support 4, while the turnbuckle 56 is shown in FIG. The cylinder 7 for releasing pressure contact is attached to the screw shaft 69 for adjusting the position of the vertical seal belt, which is rotatably connected in the expanding direction via a universal joint not to be used.
6 is screwed, and a driven pulley 6 for extending a vertical seal belt is attached to a bearing 68 attached to a rod end thereof via a bracket 77.
It is configured to support the sixth shaft 67. Reference numeral 55 in the figure denotes a servo motor for driving a turnbuckle,
Reference numeral 71 denotes a sealing heater.

According to the apparatus configured as described above, the pair of pull-down belts 51 and 51 and the vertical seal belt 65 can be moved and adjusted equally in the radial direction from the central axis by operating the servo motor 55 for position adjustment. At the same time, if twisting occurs in the packaging material bent into a tube by a not-shown former, the twisting of the packaging material can be removed by adjusting the feed speed of each pull-down belt 51, 51. If the packaging material is cut or jammed, the emergency release cylinders 73, 73 and the pressure release cylinder 76 are operated to wrap the pull-down belts 51, 51 and the vertical seal belt 65. The feeding of the packaging material can be immediately stopped by separating from the material.

Further, in this embodiment, when the feeding of the packaging material is stopped, the pressure release cylinder 76 is operated to separate the vertical sealing belt 66 from the packaging material, and the vertical sealing belt 66 is continuously driven. This can prevent the vertical seal belt 66 from being partially heated by the heater 71.

In this embodiment, the cylinders 74 and 76 are used as means for separating the belts 51 and 65 from the packaging material. However, this can be replaced by a drive mechanism such as an electromagnetic solenoid. The screw pitch of the buckle 56 is increased, and in an emergency, the pull-down belt 51 is used.
Can be pushed out by hand.

In this embodiment, the belt 51,
Although two individual drive mechanisms 65 and a pressure release mechanism for the belts 51 and 65 are provided in parallel, it is needless to say that only one of the mechanisms may be applied as necessary. . Although the above is an explanation of an embodiment applied to a vertical pillow packaging machine having a filling cylinder, the present invention simultaneously and uniformly adjusts the position of a pair of pull-down belts and vertical seal belts as described above. Since it can be performed, it can also be applied to a tubeless structure packaging machine that does not use a filling cylinder,
In addition, in order to apply this type of apparatus, a small hole is provided at a constant interval in the center of the pull-down belt, and a suction port is provided between both pulleys that stretch the pull-down belt. It is also possible to adopt a configuration in which the packaging material is sucked toward the pull-down belt side at the portion where the numbers match, and the packaging material is held in a tubular shape.

[0023]

As described above, according to the present invention, the transfer means for pulling the packaging material and the vertical sealing means for sealing the seam of the packaging material cooperate with each other by the position adjusting means to expand and contract in the radial direction. Because it can be adjusted, according to the width of the packaging material or the size of the bag to be molded,
The transfer means and the vertical seal means can be simultaneously and equally adjusted to the required positions. In addition, by configuring each transfer means and the vertical seal means to be driven by separate drive means, the transfer speed of each transfer means is appropriately changed and adjusted to prevent twisting of the packaging material at the time of transfer. Can be avoided. Further, by configuring the transfer means and / or the vertical sealing means to be separated from the packaging material by the pressing release means, it is possible to immediately stop the transportation of the packaging material at the time of a jam or the like, and at the time of stopping the transportation of the packaging material. Local heating of this member can be suppressed by setting only the vertical sealing means in the operating state.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the present invention.

FIG. 3 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 1, 51 Pull-down belt 3, 8, 53 Pulley shaft 4, 34, 54 Bearing 5, 35, 55 Servo motor for positioning 6, 36, 56 Turnbuckle 9, 39, 59 Schmitt coupling 11, 51 Servo motor for driving 15 , 65 Vertical seal belt 76 Cylinder for pressure release

Claims (4)

(57) [Claims] 1. A vertical type wherein a band-shaped packaging material is bent into a tube shape by a former, a seam is sealed, and the packaging material is further laterally sealed for each bag unit to form a bag in order. In a pillow packaging machine, at least two sets of transfer means for frictionally holding the surface of the bent packaging material and pulling the packaging material toward the horizontal sealing means, and a vertical seal for sealing a joint of the packaging material A vertical pillow packaging machine characterized in that a position adjusting means for expanding and contracting the means with respect to the packaging material in the radial direction while cooperating with each other is provided. 2. The vertical pillow packaging machine according to claim 1, wherein said plurality of transfer means and said vertical sealing means are driven by different driving means. 3. The vertical pillow packaging machine according to claim 1, further comprising a pressure releasing means for expanding the plurality of transfer means in a direction for separating the plurality of transfer means from the packaging material. 4. The vertical pillow packaging machine according to claim 1, further comprising a pressing release means for expanding the vertical sealing means in a direction of separating the vertical sealing means from the packaging material.