JPH01114428A - Bag making device - Google Patents

Abstract

PURPOSE: To enable to securely guide introduction of a tube by following transfer of a bag production mechanism and by constantly providing a guide belt that forms a guide face for carrying in the tube at the entrance and exit of that mechanism. CONSTITUTION: A screw shaft 88 is rotated by driving a motor 87 depending o the size of the bag to be formed, and a bag production mechanism 12 is moved/adjusted lengthwise along a rail 15 in accordance with the bag size via a nut 86 that has been screwed to this shaft 88. With the guide belt 18 mounted together with this mobile bag production mechanism 12, a guide face of the tube 4 is formed in front and rear (entrance and exit) in the moving direction of this mechanism 12. In consequence, no clearance or the like develops at all between front and rear of the mechanism 12 and the guide belt 18, introduction of the tube 4 can be constantly guided without fail, and the bags with desired size are securely be formed only be setting the tube 4.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a bag making apparatus, particularly to a bag making apparatus suitable for use in a powder packer apparatus.

<Prior art and its problems> A long flat film tube is prepared, and the tube is conveyed in the longitudinal direction along a guide surface while being cut and sealed at a constant longitudinal dimension according to its width. 2. Description of the Related Art Bag-making apparatuses for forming bags of a predetermined size are conventionally known. In other words, if you want to form a large-sized bag, use a wide tube, and if you want to form a small-sized bag, use a small-width tube, and then This device uses guide surfaces, cutters, heat seals, etc. to transport, cut, and seal items for each size.

However, in such conventional bag making equipment,
When changing the type of tube, for example, in order to form a large bag, you remove the narrow tube that was used until now and reinstall it in a wider tube. Since the length (position) to be cut and sealed changes, the assembly position of the bag-making mechanism (cutter, heat seal, etc.) must be changed each time, and the position of the tube must also be changed due to the change in the position of the bag-making mechanism. It was very troublesome because the guide surface had to be changed as well. Therefore, although it is good when a large number of bags of one type of size are to be continuously formed, in the case of high-mix, low-volume production in which bags of various sizes are formed in small quantities, work efficiency inevitably decreases. Ta.

The present invention has been made with attention to such conventional techniques, and it is an object of the present invention to provide a bag-making device that can solve the above-mentioned problems.

<Means for Solving the Problems> In order to achieve the above object, the bag making mechanism of the bag making apparatus according to the present invention is movable in the longitudinal direction according to the size of the bag to be formed by the moving means. , and guide belts that serve as guide surfaces for the tube are integrally attached to the front and back of the moving direction.

Function: The bag making mechanism is moved and controlled to the optimal position according to the tube size, so even when using tubes of different sizes, there is no need to make troublesome adjustments or recombination of the mechanism. Just by setting it, you can automatically form a bag reliably.

Embodiments Hereinafter, a preferred embodiment of the bag making device according to the present invention will be described with reference to the drawings based on a bag making device incorporated in a puff car device for white rice.

The packer device 1 includes a bag making device 2 and a polished rice charging device 3. That is, the structure is such that an independent bag 5 is made from a tube 4 in the form of a long flat film using a bag making device 2, and polished rice 6 is charged into the bag 5 using a rice charging device 3 to pack the bag. Note that a description of the polished rice charging device 3 will be omitted.

First, the long flat film tube 4 processed by the bag making device 2 will be explained. 6 bags of white rice (
The sizes of the bags 5 used for packing (packs) are limited to a certain number of sizes, from 1 kg to 5 kg, 10 kg, and 15 kg, and the width size W is determined according to each size.
tube 4 is used.

In other words, the various bags are formed by cutting and sealing the tube 4 at regular intervals in the longitudinal direction.
The longitudinal dimension of the tube 4 to be cut is also uniquely determined according to the width size W of the tube 4.

On the edge portion 7 of the tube 4, marks 9 are printed at fixed positions in the width direction (Z direction in the figure) from the edge 8 of the tube 4 at a pitch P corresponding to the length in the longitudinal direction to be cut. . This mark 9 is detected by an optical sensor 10, which will be described later, and the size of the bag 5 to be formed is determined by detecting this mark 9, and other mechanisms such as the bag making device 2 are controlled. (See Figures 1 and 2). In addition, by detecting the pitch P of both edges 8, the bag 5 to be formed can be determined.
You may also determine the size of.

Next, the bag making device 2 will be explained.

The bag making device 2 includes a take-up roll 11, a bag making mechanism 12, a suction pad mechanism 13, and an air nozzle (air nozzle mechanism) 14.
It is composed of. Note that the description of the suction pad mechanism 13 and the air nozzle mechanism 14 will be omitted.

Roll (MW) 11 is a winding roll, which winds up and stores a tube 4 in the form of a long flat film made of synthetic resin so as to be freely sent out.

Bag-making mechanism (FIGS. 2' and 3) Reference numeral 12 denotes a bag-making mechanism, which is mounted and fixed on a trolley 16 that is slidable on rails 15 in the front and rear directions (X and Y directions in the figures). This truck 16 is connected via a fixing nut 86 to a screw shaft 88 which is rotatably driven by a motor 87 serving as a "moving means" so that it can slide freely. At the front and rear (inlet and outlet parts) of this bag making mechanism 12, springs 1 are hooked and rotated in a loop via a plurality of rotating rollers.
Each end of the guide belt 18 with 7 is connected to follow the movement of the bag making mechanism 12. Therefore, the bag making mechanism 1
A guide belt 18 is formed in front and behind the tube 2 in a flat state without loosening along the moving direction, and this flat portion becomes a guide surface (movement reference surface) for the tube 4 as described later. The tube 4 is guided by the guide belt 18 to be accurately positioned at the entrance of the bag making mechanism 12. Incidentally, instead of the guide belt 18, convex type belts may be provided before and after the bag making mechanism 12, respectively. Further, the movement of the bag making mechanism 12 is controlled by a signal (information) from a pulse generator 19, which will be described later, and which is built into the bag making mechanism 12.

The structure of the bag making mechanism 12 itself is shown in FIG.

Reference numeral 20 indicates a pair of upper and lower feed rollers.
A plurality of spring belts 21 for feeding the tube 4 are wound around the , and one end of this feeding roller 20 rotates together with the feeding roller 20 and generates a number of pulses corresponding to the amount of rotation of the feeding roller 20. A pulse generator 19 is attached. This number of pulses is used to determine various bag sizes, as will be described later.

22 is a cutter which cuts the tube 4 by sandwiching it between upper and lower blades.

Reference numeral 23 denotes a heat-sealing body, which can weld the tube 4 in the width direction by sandwiching the tube 4 between the lower heating section 24 and the upper receiving section 25 to form the bottom of the bag 5.

Reference numeral 26 denotes a fine needle for making holes, which descends into each gap between the plurality of spring belts 21 to form a plurality of deaeration holes along the width direction of the tube 4.

The vertical movements of the cutter 22, the heat seal body 23, and the fine needle 26 are simultaneously performed by the expansion and contraction of the cylinder 27 disposed below.

Reference numeral 10 denotes an optical sensor, which is composed of an edge detection sensor 90 for detecting the edge 8 of the tube 4 and a mark detection sensor 91 for detecting the mark 9. The mark detection sensor 91 includes a light emission detection section 28 on the upper side (the side corresponding to the surface of the tube 4 on which the mark 9 is printed) and a reflection section 29 on the lower side.
It is of a reflective type, consisting of a light source section 30 and a light source section 30.

That is, the light emission detection section 28 optically connected to the light source section 30
The light beam emitted from the tube 4 first passes through the tube 4 and is reflected by the lower reflecting section 29. Then, this reflected light beam passes through the tube 4 again and returns to the original light emission detection section 28, and the mark on the tube 4 is detected by comparing the amount of light of this returned light beam with the amount of light emission. Further, the edge detection sensor 90 is composed of a light emission detection section 92 and a light source section 93, and detects the edge 8 by detecting the light reflected on the surface of the tube 4. The light emission detection section 28, reflection section 29, and light emission detection section 92 of the optical sensor 10 can be mounted upside down depending on the surface on which the mark 9 is printed.

The light emission detection unit 28 is located in the width direction of the tube 4 (Z direction in the figure).
It is fixed to a frame 31 that is freely movable. A rack 32 is attached to the lower surface of the frame 31, and when this rack 32 engages with a pinion 34 rotated by a motor 33, it can reciprocate in the width direction (FIGS. 5 and 6).

Next, the operation will be explained.

First, a case will be described in which a 10 kg bag 5 is formed and the bag 5 is used to pack white rice 6. The tube 4 sent out from the take-up roll 11 passes through a plurality of guide rollers and is guided into the bag making mechanism 12 while being placed on the surface of the guide belt 18. The optical sensor 10 is activated from the moment the tip of the tube 4 is introduced into the bag making device 2.

Etsuji inspection! (Fig. 1) First, the edge detection sensor 9 of the optical sensor 10 detects the edge 8 of the tube 4 while moving in the width direction Z of the tube 4.
An edge detection operation is performed to locate the edge. When the edge detection sensor 90 detects the edge 8, it moves further based on the detection position, and this time the mark detection sensor 91 is located on the printing line of the mark 9 on the tube 4.

Therefore, it becomes possible to detect the mark 9 printed on the edge portion 7 of the tube 4 at a fixed position along with the edge 8.

Pitch extraction (4 sizes by 1) operation (first) Next, the tube 4 introduced into the bag making mechanism 12 is moved by the feed roller 20
Since the bag 5 is conveyed in the feeding direction along the edge 8 of the bag 5, that is, along the longitudinal direction, the mark detection sensor 91 detects each mark 9, and at the same time, the pulse generator 19 detects the pitch P between the marks 9. The number of pulses (in this example, one pulse corresponds to one crane) is counted. That is, at the same time that the mark detection sensor 91 detects the first mark 9a, the pulse generator 19 starts counting pulses, and when the second mark 9b is detected, the tube 4 is conveyed (the feed roller 20
(rotation) stops, and at the same time, pulse counting also stops. Since the pitch P of the mark 9 is printed in advance according to the size of the tube 4, it can be determined from the number of pulses counted at this time that the type of bag 5 to be made is a bag 5 for packing 10 kg. Become.

Next, the feed roller 20 reversely rotates by one pinch P to return the tube 4, and the cutter 22 cuts the first mark 9a.
It is positioned relative to the first cut line 78a immediately before, and is cut there to cut off the unnecessary portion 84 of the tip whose dimensions are not accurate.

This cut end becomes the front end 89 of the first bag 5. Note that this return operation is performed only when a new take-up roll 11 is used and there is an unnecessary portion at the end whose dimensions are not accurate.

Size/response φ (2 sizes and Fig. 3) The signal (number of pulses) corresponding to the tube 4 for packing 10 kg is generated by the pitch P detection operation between the marks 9 and the bag making mechanism 1.
2 is transmitted to the motor 87 of the truck 16 on which the motor vehicle 2 is assembled. In other words, the bag making mechanism 12 uses the signal from the pulse generator 19 to cause the tube 4 to match the distance from the front end position 77 as the "predetermined position" of the bag making device 2 to the cutting position with the longitudinal dimension of the bag 5. It moves back and forth while being held between the feed rollers 20 and stops. In other words, at this point 10k
The position of the bag-making mechanism 12 corresponding to the bag 5 for g-packing is determined. At this time, the canter 22 is positioned to correspond to the cut line 78b of the first bag 5, and the heat seal body 23 is positioned to correspond to the seal portion 79, respectively.

- Seal (Fig. 3) Next, the tube 4 is sent out in the feeding direction at a pitch of 2 minutes (the number of pulses), and the cutter T8b and the seal portion 79 are positioned relative to the cutter 22 and the heat seal body 23. In addition, at this time, the cut opening (front end 8
9) corresponds to the front end position 77 of the bag making device 2. The tube 4 is sandwiched between the cutter 22 and the heat seal body 23 by the operation of the cylinder 27, and at the same time, the fine needle 26 is lowered. A predetermined cut line 78b is cut, and the seal portion 7
9 is sealed (bottom sealed in this embodiment) and a plurality of degassing holes are made along the seal 79 by the fine needle 26. In this way, the bag 5 into which the white rice 6 is placed and sealed is formed.

Note that this vent hole is for removing internal air after the polished rice 6 is packed into bags.

By repeating the above operations continuously, 10k
The bags 5 can be formed one after another in the same manner as if they were filled with g.

And if you want to form a bag of another size, S
When changing to KTR, it is sufficient to simply set a long tube for 51QR in this bag making device 2. Once set, the bag making mechanism 2 is positioned and controlled to the appropriate position via the optical sensor 10, so bags of the new size can be created without any troublesome adjustments or mechanism recombination. Can be formed automatically.

Effects> Since the bag making apparatus according to the present invention has the contents as described above, it can produce the following effects.

(a) The bag making mechanism is moved and controlled to the optimal position according to the bag size, so even when using tubes of different sizes, there is no need to make troublesome adjustments or recombination of the mechanism, and the tubes can be set. You can reliably form a bag of the desired size just by using this method.

(b) Guide belts are integrally attached to the front and rear of the bag-making mechanism (inlet and outlet sides), so even if the bag-making mechanism moves, there will be no gaps between the front and rear. It is possible to reliably guide the introduction of the tube.

Furthermore, according to the embodiments of the present invention, the following effects can be achieved.

(Since the positional relationship of each element (cutter, heat-sealing body, fine needle) in the C1 bag-making mechanism is always constant, the cutting position, sealing position, and punching position are always constant.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing how tubes are made into bags, Fig. 2 is a schematic side view showing the entire bunker device incorporating the bag making device, and Fig. 3 is a diagram of the bag making mechanism. An enlarged side view, FIG. 4 is a side view showing the light emitting detection section and reflection section of the mark detection sensor, and FIG. 5 is an arrow shown in FIG.
A partially broken side view seen from the direction, and FIG.
FIG. 2 is a partially cutaway plan view seen from the direction indicated by the arrow (■) in the figure. 2--Bag making device 4--Tube 5-Bag 7-Edge portion 9-Mark 10--Optical sensor 12--Bag making mechanism 18...-Guide belt 77... Front end position R (predetermined position) 87 ---1--Morph (moving means) 88...-Screw shaft (moving means) 89---Front end L -Longitudinal dimension

Claims (1)

[Claims] A long flat film-like tube carried in the longitudinal direction is cut and bottom sealed by a bag-making mechanism in the longitudinal direction from this predetermined position every time the front end of the tube reaches a predetermined position. In a bag making device that forms bags of a predetermined size, the bag making mechanism includes: a moving means for moving the bag making mechanism itself in the longitudinal direction according to the size of the bag to be formed; and this moving means. 1. A bag making device comprising: a guide belt that follows the movement of a bag making mechanism moved by the bag making mechanism and constantly forms a guide surface for carrying in a tube at an inlet and an outlet portion of the bag making mechanism.