JPS6323290Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a bag opening and an opening holding device, which opens a bag, inserts the bag into a bag forming holding mechanism provided in an automatic packaging machine, and holds the opening. It is a device that does

[Conventional technology]

Conventionally, this type of bag opening and opening holding device has been designed such that the bag opening of a gusset bag is opened by the suction action of suction cups from both sides, and then the suction cups are moved up and down and opened/closed, and inserted into a mandrel guide to hold the opening. However, since the suction cup is moved up and down and opened and closed intermittently, the efficiency is low and the mechanism is complicated.

[Problem that the invention attempts to solve]

Taking these points into consideration, the applicant has developed a suction mechanism that allows a pair of endless belts with equally spaced holes to face each other and continuously move them, as well as to open the bag opening. By providing the bags on the back surfaces of both endless belts at appropriate positions and close to each other, it became possible to efficiently open the bags and insert and protect the openings into the mandrel guides.

[Means to solve the problem]

In this way, when a flatly folded gusset bag is inserted between a pair of continuously moving perforated endless belts, the gusset bag is sandwiched between the opposing endless belts and rises vertically to a position where both belts are separated. This device opens the mouth of the gusset bag using a provided suction mechanism, and as the endless belt moves, the bag is raised further while the bag is open, and the opened gusset bag is inserted into and held by the mandrel guide waiting above.

[Effect]

Thus, in this case, a cylindrical bag is sandwiched between opposing endless belts and vertically rises, the bag opening is opened by a suction mechanism, and as the endless belt moves, the bag is raised further while remaining open, and is moved to a mandrel guide waiting above. This makes it possible to efficiently insert an opened bag and mold and hold it in a square bottom bag.

〔Example〕

An embodiment of this invented device will be explained with reference to the drawings. FIG. 1 is a front view of this invented device, and FIG. 2 is a side view.

In the figure, reference numeral 1 denotes a plate-shaped base, which is provided at appropriate intervals with its principal surface parallel to the plate-shaped mounting plate 2 serving as the front surface. In addition, between these plates 1 and 2, pulleys 3 and 3', 4 and 4', 5 and 5', and 6 and 6' are arranged in parallel and facing each other in pairs upwardly, and furthermore, a pulley 6 , 6', these pulleys 6,
A pair of pulleys 7, 7' are disposed outside of the pulley 6', and both are rotatably supported in the axial direction, and endless belts 8, 8' having a pair of holes 9, 9' are successively stretched around the pulleys 7, 7'. That is, the endless belts 8 and 8' are connected to pulleys 3, 4, 5, 6, 7,
3, as well as 3', 4', 5', 6', 7', and 3', and the respective shafts of pulleys 3 and 3' are extended to connect gears 16 and 16' (however, 16' is not shown). The rotation of the driving power source is connected to the endless belt 8,
8'. The holes 9, 9' (however, 9' is not shown) in the endless belts 8, 8' are shown as three round holes horizontally and vertically spaced at equal intervals over the entire circumference. The arrangement, number, and shape of the holes need not be limited to those shown in the figures, and as the belt material, commercially available belt materials may be used as appropriate in addition to synthetic rubber materials. The arrangement of the pulleys is such that the lower pulleys 3 and 3' are slightly separated from each other so that the bags can be fed upwards, and the intermediate pulleys 4 and 4' arranged above them, and the intermediate pulleys 5 and 5 slightly above them. After the belts 8 and 8' are brought into close contact with each other so that the bag is clamped between them, the distance between the upper pulleys 6 and 6' is widened upward, and the pulleys 5 and 6, 5' and 6 are The belts 8, 8' between ' are widened upward and inclined,
Box-shaped intake tanks 13, 13 are arranged on the back side of the belts 8, 8' on this slope so as to open toward the belts 8, 8', and connected to the suction side of the ring floor via pipes 14, 14'. Make the connection. Note that the surface of the intake tank 13, 13' that is close to the belt 8, 8' is the fifth
As shown in the figure, elongated holes 18, 18' are provided in parallel with the arrangement of the round holes 9, 9' of the belts 8, 8', and air is taken in through the round holes 9, 9' of the belts.
8' performs suction on the bag being carried, and continues opening and transporting the bag. The pulleys 4, 4' have their axes aligned with the vertical holes 15, 15', and their positions can be adjusted up and down, and each belt pulley 3, 4, 5, 6,
For belts 7, 3', 4', 5', 6', and 7', uneven portions may be provided on the back surface of the belt, that is, on the pulley contact surface and on the outer peripheral surface of each belt pulley to prevent the belt from slipping. The upper pulleys 6, 6' are provided with upper pulleys 7, 6' and 7' at the same height on the sides and spaced apart from each other.
A pair of rotating rolls (made of rubber) 12, 12 are provided above the upper pulleys 6, 6' which return the feed of the belts 8, 8' to the pulleys 3, 3' in parallel at an appropriate interval. ′, the upper pulley 6,
Belts 11 and 11' are stretched between the rolls 12 and 12' so that the rotation of the rollers 6' is transmitted to the rolls 12 and 12', respectively. Furthermore, these rolls 12, 12' are structured so that they come into contact with and separate from the sides of mandrel guides 17, 17' which wait above and open and close like bird's beaks, as shown in FIGS. 7 and 2. It is arranged above the side surface of the base 1. Also the 7th
As shown in the figure, the shafts of the upper pulleys 6, 6' are extended to serve as pivot points 25, 25', and the L-shaped levers 24, 2 have rolls 12, 12' attached to their upper tips.
4', and the other ends of L-shaped levers 24, 24' connect connecting rods 26, 26' to both ends of a movable plate 27 that moves up and down, respectively. The movable plate 27 is moved up and down along a pair of vertical axes 29 and 29' by the operation of an air cylinder 30 fixed to the side surface of the base 1. The air cylinder 30 is operated by the movable plate 27 and the connecting rod 2.
6, 26' and L-shaped levers 24, 24' to open the rolls 12, 12'.
7, 17', and swings in the direction of the arrow. Although the mechanism shown in FIG. 7 is used here to open and close the rolls 12, 12' in the lateral direction, the mechanism is not limited to this, and the rolls 12, 12' may be operated using a cam lever, a solenoid, etc. Good too.

In the upper center of this device, mandrel guides 17 and 17', which operate to open and close as described above, are provided for the bag forming holding mechanism, into which the gusset bag 20 is inserted, as shown in Fig. 4 A and B. As shown in the perspective view of Fig. 6, when viewed from above, it has the shape of two U-shaped frames combined, and the rotation support shafts 19, 19' at the upper end are connected to the square bag 22. The lower tip acts as a fulcrum for opening and closing,
A hopper 23 is arranged above it, and its square lower part 23' is assembled within the square frame of the mandrel guides 17, 17'. The mandrel guides 17, 17' are part of the packaging mechanism and are attached to a disc or an endless chain, or one or more mandrel guides, and the one shown in this figure is of a structure that moves intermittently in the lateral direction.

Next, the bag opening and holding device, which is the main part of this devised device, will be explained. As shown in FIG. Open the mandrel guide 1 using a raised suction device.
7, 17' to form and hold the square bottom bag 22 is shown in FIGS. 3A to 3D.

First, belts 8 and 8' facing each other in A of the figure
Bag opening 2 of gusset bag 20 (Figure 4 A) from below.
When inserted between the belts 8 and 8' with 0' facing up, the belts 8 and 8' are quickly clamped by continuous rotational movement in the direction of the arrow, and the adjuster pulleys 4 and 4' and the intermediate pulley 5 and 5', the bag 20 rises. Next, the bag opening 20' is gradually opened as it rises while being sucked by the air intake devices 13, 13' through the round holes 9 of both belts 8, 8' between the pulleys 5 and 6, 5' and 6'. Furthermore, as shown in Figure C, the lower ends of the mandrel guides 17, 17' are attached to the bag 20.
The rolls 12, 12' rise while being inserted into the
When the bag opening 20' comes out upwards, the mandrel guide 1
7, 17' are operated to open and their sides are raised by the rotation of the rolls 12, 12' rotating through the bag 20, and are deeply inserted into the opened mandrel guides 17, 17', and the gussets are opened as shown in FIG. bag 20
is formed in the square bottom bag 22. When the square-bottomed bottom seal 21 stops rising, both rolls 12, 12' are separated from the sides of the square-bottomed bag 22 by the operation of the air cylinder 30. L-shaped lever 2
When the rolls 12, 12' are also opened by the opening operation of 4, 24', the mandrel guide 17 holding the square bottom bag 22,
17' moves laterally, the closed mandrel guide then moves the rolls 12, 1 as shown in Figure A.
2' and stops, and the rolls 12 and 12' are moved between the L-shaped levers 2 and 2' by the operation of the air cylinder 30.
4 and 24', it performs a closing operation and returns to its original position.

[Effect of idea]

In this way, in this invention, a pair of endless belts 8, 8' having holes made at equal intervals are placed opposite each other, and a suction mechanism for continuously moving the gusset bag 20 and opening the bag opening is provided on both endless belts 8, 8'. By providing the gusset bag 20 at an appropriate position and close to the back surface of the gusset bag 8', the opening can be inserted into the mandrel guides 17, 17', which wait in the upper position and open and close with their downwardly facing ends, to open the gusset bag 20 efficiently. It has now become possible to efficiently form and hold the bag 22.

In addition, 10a and 10b shown in FIG. 2 are gusset bags 2.
The adjusting pulleys 4, 4' are designed to allow the mounting position to be adjusted up or down depending on the nature and length of the bag.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views of this device, Figures 3A to 3D are schematic diagrams for explaining the operation, Figures 4A and 4B are perspective views of the gusset bag and the square bottom bag, and Figures 4A and 4B are perspective views of the gusset bag and square bottom bag. Figure 5 is a front view showing the long hole arrangement of the intake tank, Figure 6 is a perspective view showing the relationship between the mandrel guide and the hopper,
FIG. 7 is a schematic diagram for explaining the operating mechanism of the rolls 12, 12'. 1 is the base, 2 is the mounting plate, 3, 3' are drive pulleys, 4, 4' are adjustment pulleys, 5, 5' are intermediate pulleys, 6, 6', 7, 7' are upper pulleys,
8, 8' are belts, 9, 9' are round holes, 11, 11'
is a belt, 12, 12' are rolls, 13, 13' are intake tanks, 17, 17' are mandrel guides,
20 and 20' are bags.

Claims (1)

[Scope of utility model registration request] A pair of endless belts 8, 8' are provided with a large number of holes at appropriate intervals over the entire circumferential surface and are arranged facing each other, and whose running parts run from bottom to top while sandwiching the cylindrical bag. Then, the pair of endless belts 8, 8' are stretched across the opposing running parts, with a slight distance between them at the bottom, narrowing the distance toward the top, and finally bringing them into close contact with each other, and gradually increasing the distance between each other. Belt pulleys 3, 4, 5, 6 arranged in pairs in the vertical direction,
3', 4', 5', 6', and intake tanks 13, 13' provided on the back surfaces of the endless belts 8, 8' in inclined positions where the distances described above are gradually separated, and The mandrel guides 17, 17' whose tips open and close, and the mandrel guides 17, 17' which are movable toward and away from the side surfaces of the mandrel guides 17, 17' above the uppermost belt pulleys 6, 6', and when in contact with the mandrel guides 17, 17'. A pair of rolls 12, 12' that raise the supplied bags along the mandrel guides 17, 17', and an operation that brings the pair of swinging rolls 12, 12' into and out of contact with the side surfaces of the mandrel guides 17, 17'. A bag opening and opening holding device consisting of a mechanism.