JP2776454B2 - Shape displacement detector for filled packaging bags - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of conveying a continuous filling and packaging bag containing contents such as liquids and powders, counting the number of the bags, and placing the continuous filling and packaging bag on a horizontal seal portion. Cutting
The shape of the packing bag to detect the cutting position when performing
The present invention relates to a shape displacement detection device .

[0002]

2. Description of the Related Art In general, a packing bag containing contents such as liquids and powders is provided with a vertical seal portion which is continuously heat-sealed in a vertical direction while continuously feeding and forming a band-like film at predetermined intervals. A lateral seal portion is formed by heat sealing in the lateral direction, and a bag-like portion filled with contents is formed in a film surrounded by the vertical seal portion and the horizontal seal portion. The filled packaging bag filled with the contents is cut, for example, by cutting the center of the horizontal sealing portion of each filled packaging bag by a cutter mechanism provided in the filling and packaging machine, and carrying out as a single packet, or After the heat sealing in the transverse direction of the film by the transverse sealing mechanism in the transverse direction of the film to make a small bag,
The connected packed packaging bags are continuously carried out and packed in a storage box. In this case, the packed packing bags connected in a continuous state are counted in a predetermined number as they are and packed in a storage box, or each filled packing bag is cut by a cutter while counting the filled packing bags in a continuous state a predetermined number. Sometimes it is stored in a packaging box. By the way, generally, the number of the filled packing bags is detected , or a continuous filled packing bag is
When cutting is performed, the thickness of the filled packaging bag is detected to detect the cutting position . In other words, in this filling and packaging bag, the difference in thickness between the horizontal seal portion, which is a thin portion, and the bag-shaped portion, which is a thick portion, is filled with, for example, a rotatable fixed roller and the fixed roller. And is taken out as a displacement of a swinging roller arranged so as to be pressed by a spring force or a magnet attraction and repulsion force. When the displacement exceeds a predetermined value, it is detected by a detector and the filling bag is filled. form of contact for detecting the thickness
A state displacement detecting device is disclosed in Japanese Utility Model Publication No. 58-26322 or Japanese Utility Model Publication No. 4-16168.

[0003]

However, in the above-described conventional apparatus, as described above, the thickness of the horizontal seal portion, which is a thin portion, and the thickness of the bag-shaped portion, which is filled with contents, is increased. Since the difference in height is detected as the displacement of the oscillating roller, for example, if the contents contained in the bag are small, the swelling of the bag is small and the displacement of the oscillating roller is very small. Is difficult. Conversely, when the contents stored in the bag-shaped part are large, the swelling of the bag-shaped part is large and the displacement of the swinging roller is large, so when transporting and detecting the filled packaging bag at high speed, There is a possibility that the swing of the swing roller may not be able to follow the shape change of the filled packaging bag, and in any case, accurate shape displacement detection may not be possible. If this shape displacement detection is not accurate
The counting of the bag-shaped part of the filling packaging bag was not performed correctly.
When cutting with a cutter,
Position is not accurately detected for cutting
Operation timing is inaccurate and the cutting position at the horizontal seal
Misplaced or, in the worst case, a bag-shaped part of a filled packaging bag
May be defective and the contents may splatter.
It leads to become the kind of problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a contact-type shape displacement detecting device capable of performing an accurate shape displacement detecting operation. A folded portion is formed at one end, which is fed back to form a bag, and a longitudinal seal portion is formed at the other end, which is formed by heat-sealing the film overlapping edge in the longitudinal direction. A packing portion provided with a sealing portion, and in which a bag-like portion containing contents is provided in a film surrounded by the vertical sealing portion and the horizontal sealing portion, is continuously transported, and the transported packaging bag is conveyed. A detector is provided in contact with the folded portion of the bag-shaped portion formed in the above, and a detector for sensing displacement of the detector is provided. Further, the detector is constituted by a rotatable detection roller.

[0005]

The detector provided in contact with the folded portion of the bag-shaped portion formed in the filling and packaging bag has a folded portion formed of a single film which is softer than the horizontal seal portion. The detector is pushed back in the rigid horizontal seal portion, which moves in the depth direction and is heat-sealed in two layers compared to the bag-like portion made of one film, and has a flexible displacement of the detector. The shape displacement of the filled packaging bag is detected by repeatedly sensing with a detector as a bag-shaped portion or a hard horizontal seal portion , and for example, the bag-shaped portion of the filled packaging bag is detected.
For counting the number and cutting at the position of the horizontal seal
It can detect and set the operation timing of the cutter.
it can.

[0006]

1 and 2 show a first embodiment of the present invention. The apparatus of the present invention is provided with a vertical seal in which a band-shaped film is continuously fed by a filling and packaging machine (not shown), and a folded portion R is formed at one end of the film while being folded while forming a bag. A horizontal seal portion SA is provided on the other end side, and a horizontal seal portion SA which is heat-sealed in a horizontal direction in a state where two sheets are overlapped at a predetermined interval is provided.
The present invention is applied to a filling and packaging bag P provided with a bag-like portion F in which a content is accommodated in a film surrounded by L and a lateral seal portion SA. A so-called three-way seal in which a bag-like portion F is formed at the center by being heat-sealed from three sides by a vertical seal portion provided at one end in a vertical direction and a horizontal seal portion provided vertically in a horizontal direction. The shape displacement is detected while the filled packaging bags P are conveyed in a continuous state in a strip shape without being separated.

A base 2 of the shape displacement detecting device 1 is provided with an arm 4 whose intermediate portion is rotatably supported by a support shaft 3, and one end of the arm 4 is filled with a packing bag P to be conveyed. The detector 5 is provided in contact with the turn-back portion R.
The detector 5 is configured to be always in contact with the folded portion R of the filled packaging bag P in the transport state by the urging means 6 such as a spring provided between the arm 4 and the base 2, The arm 4 rotates about the support shaft 3 so that the urging force applied to the detector 5 by the urging means 6 and the force to deform the filled packaging bag P and push back against the urging force are balanced. It works.

On the other hand, a detector 7 for detecting the rotation of the arm 4 is provided at the other end of the arm 4. The detector 7 includes a shielding plate 8 provided at the other end of the arm 4 and a photosensor 9 provided on the base 2 side. The rotation of the arm 4 is detected by blocking or opening between the unit and the light receiving unit.

The base 2 is provided with a guide member 10 having a U-shaped cross section for guiding the transfer of the belt-shaped filling and packaging bag P which is continuously conveyed, facing the detector 5. The guide member 10 receives the urging force of the detector 5 by receiving the end portion of the vertical seal portion SL of the filling and wrapping bag P, which serves as a reference surface, and a receiving portion 10a which serves as a reference surface. And a side guide portion 10b for preventing the detector 5 from laterally deviating from the detector 5, thereby securely preventing the detector 5 from laterally squashing or collapsing. It plays the role of contacting the folded portion R of P.

Hereinafter, the operation of the device of the present invention will be described. When the band-shaped filling and packaging bag P containing the contents such as liquid and powder is continuously conveyed from above to below by a conveying device (not shown), the folded portion R of the filling and packaging bag P is detected by the detector 5.
Is transferred in a sliding state. Then, the detector 5 urged so as to always contact the folded portion R of the filled packaging bag P in the transport state moves on the folded portion R according to the hardness of the filled packaging bag P. In other words, the detector 5 installed on the side of the folded portion R of the filling and packaging bag P detects when the detector 5 comes into contact with the soft bag-like portion F made of one film containing the contents. The child 5 is moved by the urging force so as to enter into the depth direction of the folded portion R of the bag-shaped portion F, and the film is heat-sealed. Is contacted, the detector 5 is pushed back. The arm 4 rotatably supported by the movement of the detector 5 rotates in conjunction with the movement of the detector 5, and the shielding plate 8 provided at the other end of the arm 4 is used in this case. When contacting the bag-shaped portion F of the bag P, the photo sensor 9 is used.
When the horizontal seal portion SA is abutted against the light emitting portion and the light receiving portion, the folded portion R of the bag-shaped portion F or the horizontal seal portion SA is opened by opening the space between the light emitting portion and the light receiving portion. Discriminates and detects the signal to detect the shape displacement of the filled packaging bag P.
I have to put out .

As described above, the folded portion R of the filled packaging bag P
In the above, the difference in hardness between the relatively hard horizontal seal portion SA in which the films are overlapped and heat-sealed and the bag-shaped portion F made of a relatively soft single film is brought into contact with the detector 5 by applying an urging force. As a result, the detector 5 is taken out as a displacement, and this displacement is repeatedly detected by the detector 7 as the bag-shaped portion F or the lateral seal portion SA. Irrespective of the amount of contents, an accurate and high-speed shape displacement detection operation can be performed. Therefore, by detecting this shape displacement, for example,
The counting operation of the bag-shaped part of the packaging bag can be performed accurately.
Alternatively, detection for cutting at the horizontal seal position is performed.
It is possible to set the operation timing of
Wear.

[0012] FIG. 3 shows a second embodiment of the present invention, the base 2 of the shape displacement detecting device 1, the intermediate portion support shaft 3
The arm 4 rotatably supported by the arm 4 is provided, and a cylindrical detection roller 11 is provided at one end of the arm 4. The detection roller 11 is rotatably supported by the arm 4 and is configured to always contact the folded portion R of the filled packaging bag P in a transport state. Are provided so as to smoothly follow the change in the shape of the folded portion R. Further, as shown in FIG. 4, the detection roller 11 is a detection roller 11 which is in contact with the folded portion R of the filled packaging bag P.
The flange portion 11A is provided at both ends of the cylindrical surface of the above, or the detection roller 11 is formed in the shape of a drum having a smaller diameter from both ends toward the center, so that the folded portion R of the filled packaging bag P in the transport state is formed. Are prevented from coming off the detection roller 11 in the lateral direction.

The device of the present invention is not limited to the above-described embodiment, and the urging means 6 for urging the detector 5 toward the folded portion R of the filling and packaging bag P is not limited to a spring but rubber. Alternatively, it may be one utilizing the attraction or repulsion of a magnet. Further, an adjusting mechanism capable of adjusting the urging force of the urging means 6 according to the hardness of the film may be provided. In addition, the detector 7 is not limited to the photosensor 9 but may be a limit switch. Alternatively, a load sensor may be provided to detect the load applied to the detector 5, and the difference in the load may be used to form a bag. Part F and horizontal seal part SA
May be determined. As shown in FIG. 5, a second vertical seal portion Sl is provided between the vertical seal portion SL and the folded portion R in parallel with the vertical seal portion SL, and a plurality of bag-shaped portions F are formed in the horizontal direction. It is also possible to apply this device to the bag P.

[0014]

According to the present invention, a folded portion formed by continuously feeding a band-shaped film and folding it while forming a bag is provided at one end, and a vertical seal portion obtained by heat-sealing the overlapping edge of the film in the longitudinal direction is provided at the other end. Side, and provided with a horizontal seal portion which is heat-sealed at predetermined intervals in a horizontal direction, and a bag-like portion which contains contents in a film surrounded by the vertical seal portion and the horizontal seal portion. The bag is conveyed in a continuous state, and a detector is provided in contact with a folded portion of the bag-shaped portion formed in the conveyed filled packaging bag, and a detector for detecting a displacement of the detector is provided. In addition, since the detector is constituted by a rotatable detection roller, the difference in hardness between the relatively hard horizontal seal portion and the relatively soft bag-shaped portion in the folded portion of the filling and packaging bag. The displacement of the detector Take out, this displacement is sensed as the bag-shaped portion or the horizontal seal portion, so that accurate and high-speed regardless of the amount of the contents stored in the bag-shaped portion of the filling packaging bag Simple shape displacement detection
Work is carried out, for example, the bag-shaped part of
Counting operation can be performed accurately or horizontal seal
When cutting at the head position,
Is operated to perform a good cutting operation .

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a view of the first embodiment of the present invention as viewed from above.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a diagram illustrating a detection roller according to a second embodiment of the present invention.

FIG. 5 is a view showing another filling and packaging bag to which the present invention is applied.

[Description of Signs] 1 Shape displacement detecting device 5 Detector 7 Detector 11 Detecting roller (Detector) R Folding part SL Vertical seal part SA Horizontal seal part F Bag-shaped part P Filling packaging bag

Claims (2)

(57) [Claims] 1. A folded portion formed by continuously feeding a belt-shaped film and folding it while forming a bag is provided at one end, and a vertical seal portion is formed at the other end side by vertically sealing the overlapping edge of the film. Filling and packaging bags provided with a horizontal seal portion which is heat-sealed at predetermined intervals in a horizontal direction, and a bag-like portion containing contents in a film surrounded by the vertical seal portion and the horizontal seal portion are continuously provided. In addition, a detector is provided in contact with a folded portion of the bag-shaped portion formed in the conveyed filled packaging bag, and a detector for sensing displacement of the detector is provided. Displacement of filling packaging bag
Detection device. 2. The apparatus according to claim 1, wherein said detector comprises a rotatable detection roller .