JPS5816487Y2 - Packaging bag opening tension device - Google Patents

Description

[Detailed description of the invention] This invention is designed to provide mutual support by swinging or sliding at the opening of a packaging bag that is supported by a clamping plate, suction cup, etc., or is moved by being sandwiched between a pair of guide rails. After feeding the packaging bag between a pair of bars spaced apart from each other, the bars are brought close to each other and the left and right vertical edges of the packaging bag are held by a pair of first and second clamping pieces supported on the respective bars. The 10th and 20th rods are connected to both sides of the shaft of the horizontal rod supported by each of the pair of bars from the front and back, and the movement directions are opposite. This invention relates to a packaging bag tensioning device configured to move each of the first and second clamping pieces in opposite directions.

The packaging machine is equipped with multiple pairs of gripping arms that releasably grip the vertical edges on both the left and right sides of the packaging bag, and the gap between each pair of gripping arms can be freely expanded or contracted, and by controlling the gap reduction, the bag opening can be moved forward or backward. There is a model in which the bag opening is expanded to fill it with a packaged material, and the opening of the bag is stretched into a straight line shape by controlling the gap expansion so that it can be welded with a welding bar or the like.

However, due to the convenience of the packaging process, the packaging bag is transported without using the above-mentioned type of packaging machine, and in the final process, the bag opening is closed under straight tension and prepared for welding with a welding bar or the like. There are many cases where this is necessary.

The present invention is adapted to such packaging work.

An embodiment of the present invention will be described with reference to FIGS. 1-3.

In the figure, reference numerals 2 and 2a are rotating shafts that are erected in parallel on the support base 1 and freely rotatably supported by a support tube, and gears 3 and 3a that mesh with each other are fixed to these shafts.

One rotating shaft 2 actively performs reciprocating rotation at a small angle by a drive mechanism.

A pair of bars 4, 4a projecting in the horizontal direction and shaft support pieces 5, 5 projecting in the opposite direction are provided at the upper ends of the rotating shafts 2, 2a of the husband, etc.
A is fixed, and support pieces 6 and 7 whose spacing is adjusted by moving are fitted to one bar 4 so as to be able to slide freely, and the other bar 4 is fixed.
The support pieces 6a and 7a are slidably fitted into the support pieces 6a and 7a, and the corresponding end faces are attached to the left and right sides of the packaging bag 101 from the front and back with respect to the vertical edges 103 and 103a, using the vertical shafts 8 and 9 and 8a and 9a provided thereon. A pair of first clamping pieces 10, 101 and a pair of second clamping pieces 11, 11a that are in contact with each other are pivotally supported, and tenth pins 12, 12 are provided at each outer end of the first clamping pieces 10, 101. a
and attach a second clamp to each outer end of the second clamping piece 11.
Connect the 0 heads 13 and 13a.

The shaft support pieces 6, 7 and 5a, 7a are fixed on the bars 4, 4a as appropriate, but there are cases where they are not fixed.
In that case, the first clamping pieces 10, 101 and the second clamping pieces 11
, 113 may be fixed to the support pieces 6, 7 and 5a, 7a, respectively.

On the shaft support pieces 5, 5a, there is a mallet 14.1 formed in a cross-section shape.
Each center part of 4H is supported by a horizontal shaft 15.15H,
A rotary piece 1717a at the upper end of each punch 14, 14a connects an appropriate length of the tenth rod 12, 12a, and a rotary piece 18, 18a at the lower end (however, 18 is not shown) connects the 20th rod. Connect the appropriate length portions of the tubes 13 and 13a.

Further, the upper ends of the connecting rods 19, 19a are connected to the projecting pieces 16, 16a of the punches 14, 14a.

Reference numeral 20 denotes a tension spring whose both ends are connected to the bars 4, 4a.

As illustrated in FIGS. 4 and 5, the device of this embodiment has a disk 2
Clamping arms 24.24 supported by parallel shafts 23.23a of shaft support pieces 22 fixed at predetermined angular intervals on the lower surface of the peripheral edge of 1
The bag opening 102 is secured by the clamping plates 25, 25 a fixed to a.
A packaging bag 101 that sandwiched and supported from the front and back. Alternatively, in place of the aforementioned clamping plates 25, 25a, the packaging bag 101 or the packaging bag 101, in which the front and back of the bag opening 102 are sucked by one to several suction cups, and the bag opening 102 is almost closed by the approach of these suction cups, or As shown in Figure 6, the left and right vertical edges 103, 103a of the packaging bag 101, etc., which are sent along the path between the V-shaped bottom rail a and the upper parallel rails b, b, are connected to the first sandwiching pieces 10, 1.
0a and the second clamping pieces 11, 11a and pull it to the left and right, thereby tensioning it in a - shape.

In FIGS. 4 and 5, the parallel shafts 23, 23a have clamping arms 24.
Place the inner side of 24 a and attach the clamping plates 25 and 25 a to the lower end.
Mounting rod 29 with connecting rods 30, 30a fixed on the top surface of
゜29 Apply tension springs 27, 27 a to a, and attach the mounting rod 29
．． Gears 31 and 318 that mesh with each other are fixed to 29a, and an operating arm 32 is protruded from one of the gears 31, and an inert gas filling tube 3 is inserted between the parallel shafts 23 and 23H.
3 and an air vent pipe 34 concentric therewith are passed through so that they can be moved up and down, and the clamping plates 25, 25a are provided with notches 26, 26a on corresponding edges for passing the husband pipes 33, 34, etc. It will be done.

Therefore, as the disc 21 rotates in the direction shown by the arrow in FIG. 4, the packaging bag 101 that is conveyed with the bag opening 102 sandwiched from the front and back by the clamping plates 25, 25a, as illustrated in FIG. The bag opening 102 is not tense.

The present invention provides a pair of bars 4, 4a in the moving path of the packaging bag 101, and FIG. shows.

In FIGS. 4 and 5, the bag opening 102 is connected to the clamping plates 25, 25.
When the packaging bag 101, which is sandwiched from the front and back at point a and has the filling tube 33 and the air vent tube 34 inserted through the bag opening 102, moves to the stop angle (I), the small of one rotating shaft 2 Due to the rotation of the angle and the interlocking rotation of the other rotating shaft 2a due to the meshing of the gears 3 and 3a, the pair of bars 4.4a expands into a figure eight shape, widens the corresponding interval, and receives the packaging bag 101.

Subsequently, the bars 4 and 4a become parallel by the swinging motion shown in FIG.
The longitudinal edges 103, 103 a are held in contact with each other from the front and back.

At the same time, the filling tube 33 and the air venting tube 34 are connected to the bag opening 102.
The connecting rod 19.19 a
rises, the rams 14, 14a rotate slightly counterclockwise to move the 10th bolts 12, 12a to the left and the 20th hammer to the left.
Move the handles 13, 13a to the right.

For this reason, the first clamping pieces 10, 10a swing and move the end surfaces in contact with the vertical edge 103 in the direction of the rotating shafts 2, 2a, and the second clamping pieces 11, 11a rotate the end surfaces in contact with the vertical edge 103a. It swings in the direction away from the shafts 2, 2a, thereby pulling the bag opening 102 left and right and tensioning it in a straight line shape.

At that time, the operating arm 32 lowered slightly from the state shown in FIG.
The bag opening 102 is linked with the mounting rod 29.29a in the approach direction.
The packaging bag 101 is released by the expansion of the bars 4, 4a as shown in FIG. 4 and the upward swinging of the operating arm 32.

The present invention has the above-mentioned configuration and action, and has a pair of bars 4.
, 4a, the front and rear surfaces of the packaging bag 101 are inserted between the bars 4, 4a, the bars 4, 4a are returned to parallel, and the left and right vertical edges 103, 103a are aligned with the bars 4, 4a.
, 4a are clamped by the first clamping pieces 10, 10a and the second clamping pieces 11, 11a provided respectively, and further, by vertical movement of the connecting rods 19, 198, the hammers 14, 14a and the tenth clamping piece 12 are clamped. , 12a and the 20th joints 13, 13a, the respective clamping pieces 10, 10a, 11, 11a are moved away from each other, thereby making it possible to tension the bag opening 102 in a straight line. This is especially suitable for instantaneous tensioning of the bag opening of a packaging bag filled with a packaged item, which is intended for welding operations.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a perspective view of the bar 4a, and FIG. 3 is a side view. FIG. 4 is a plan view showing an example of attachment, FIG. 5 is an enlarged sectional view taken at the stop angle (I) in FIG. 4, and FIG. 6 is a packaging bag 101.
FIG. 4 is a longitudinal side view showing another example of the moving route of the vehicle. 4.4a → bar, 5,5a → shaft support piece, 6,6 a・7,
7a → Support piece, 10.10 a → First clamping piece, 11.1
1 a → 2nd clamp piece, 12, 12 a → 10th clamp piece, 1
3, 13 a → 20th tsudo, 14, 14 a → ram 1
9,19 a → connecting rod.

Claims (1)

[Scope of utility model registration request] A pair of support pieces 6, 7 and 5a, 7a, whose distances can be freely adjusted by sliding, are fitted into each of the pair of bars 4, 4a, which allow the mutual spacing to approach and separate. 6, 6a and 7, 7a, respectively, first clamping pieces 10, 10a which are sandwiched from the front and back of the vertical edge of one side of the packaging bag in a state where the bars 4, 4a are close to each other; One second clamping piece 11, 11a is provided to be sandwiched from the front and back of the vertical edge, and the first clamping piece 10 on one bar 4 is provided.
and the second clamping piece 11 and the first clamping piece 1 on the other bar 4a.
1a and the second clamping piece 11a, the 10th joint 12 and the 20th joint 13, which control the movement in mutually opposite directions, and the 10th joint 12a and the 20th joint 13a are connected, and one The shaft 1 of the horizontal rod 14 has the first and 20th rods 12 and 13 pivotally supported on one bar 4 and whose swing is controlled by the connecting rod 19.
5 separately on both sides, and the other first and 20th rods 12
a, 13a is pivotally supported on the other bar 4a, and the connecting rod 1
A bag opening tensioning device for a packaging bag, characterized in that the opening tensioning device for a packaging bag is connected to both sides of a shaft 15a of a horizontal rod 14a whose swing is controlled by a lateral rod 9a.