JPH1149104A - Article pushing member in bag-making and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight by forming an article pushing member of the synthetic resin, to increase the rigidity of a bent part in which the stress is concentrated, and to suppress generation of the deflection in the bent part in the article pushing member provided on a bag-making and packaging machine in which an article is charged into a bag and packaged while a strip-like film is folded to form a packaging bag. SOLUTION: In an article pushing member 20 in which clogging with an article in a chute 7 is solved by being turned forward and projected into a chute 7, the whole shape is formed flat with the synthetic resin, a first arm part 20b extending upward from a base part 20a and a second arm part 20c which is bent from its tip and extended forward are provided, and the sectional shape of a bent part 20d between the first arm part 20b and the second arm part 20c is approximately I-shaped by two tubular parts along the inner periphery and the outer peripheral of the bent part 20d and a wall-like part to connect two tubular parts to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article pushing member provided in a bag making and packaging machine for packaging articles while forming a packaging bag from a strip film.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Publication No. 3-1362, for example, a strip-shaped film is unwound from a roll and transported downward to form a tubular body, and a lower end of the tubular body is formed. 2. Description of the Related Art There is known a bag-making and packaging machine in which an article is put in after sealing, and the upper part of the article input section is also sealed, thereby forming a packaging bag and enclosing the article in the bag.

[0003] As shown in FIG.
A former A is provided, and the former A is folded so as to overlap both sides of the strip-shaped film B unwound from the roll to form a tubular body C. Thereafter, both sides of the tubular body C which are overlapped with each other are formed. The parts are welded by a vertical sealing device (not shown) and are also welded in the width direction by a horizontal sealing device (not shown) to form a packaging bag.

[0004] A chute D for charging articles is arranged so as to protrude into the former A from above. The articles are charged from above into a packaging bag whose lower end is sealed by the horizontal sealing device. Is sealed in the width direction by a horizontal sealing device to seal off the article input section,
Thereafter, by cutting the upper part of the sealing portion, a product in which a predetermined amount of articles is enclosed is manufactured.

In the above-described bag making and packaging machine, when an article is put into a bag whose lower end is sealed via the chute D, the article may be placed in the chute D depending on the size and shape of the article. And may not fall into the packaging bag. In this case, a product with a small content is manufactured, or an article that has been clogged in the chute D at the time of the previous supply to the next packaging bag drops and a product with a too large content is manufactured, so that operation cannot be continued. Will occur.

[0006] In order to cope with this, there is a case where an article pushing member for forcibly dropping an article caught in the chute into the packaging bag is provided.

As shown in FIG. 7, the article pushing member E has a first arm E2 extending upward from a base E1 attached to the swing shaft F at an initial position, and a second arm extending forward from the tip thereof. E3, and has a shape bent substantially in an L-shape.
Is arranged above the rear part of the former A, and is rotated by a driving means G such as a motor via the swing shaft F to rotate forward from an initial position shown by a solid line. As described above, when the second arm portion E3 protrudes into the chute D, the articles clogged in the chute D are surely dropped into the packaging bag.

[0008]

By the way, when the above-described article pushing member E is provided, especially when the article pushing member E made of synthetic resin is provided, the following problems may occur.

That is, when the article pushing member E periodically reciprocates between the initial position and the position at which it enters the chute D, the inertial force causes the first arm E2 and the second arm E3 to move between the first position and the second position. The stress is concentrated on the bent portion E4 between the two and the bending occurs, and the bending causes the article pushing member E to contact the chute D without accurately entering the chute D,
Alternatively, the bending portion E4 may be broken due to fatigue due to repeated occurrence of bending.

On the other hand, the article pushing member E
May be made of metal. However, in the case of metal, the weight is heavy and the load on the driving means is significantly increased, so that a large-capacity motor is required as the driving means, and the speeding up of the packaging operation is hindered. When the packaged object is a food, a metal detector may be installed in the bag making and packaging machine in order to eliminate the inclusion of metal foreign matter.In this case, the metal detector is placed near the article pushing member. When the metal detector is arranged, it may cause a malfunction of the metal detector.

It is also conceivable that the article pushing member is made of a synthetic resin containing reinforcing fibers. According to this, weight reduction and improvement in rigidity can be achieved, and the above problem is solved.In this case, when the reinforcing fibers are peeled from the article pushing member and mixed into the product, and the packaged object is a food, Hygiene problems occur.

In view of the above, according to the present invention, the article pushing member is formed of a synthetic resin, thereby reducing the weight and increasing the rigidity of the bent portion where the stress is concentrated to suppress the bending at the bent portion. It is an object to solve such a problem.

[0013]

In order to solve the above-mentioned problems, an article pushing member according to the present invention is characterized in that it is constructed as follows.

That is, the invention according to claim 1 of the present application (hereinafter referred to as the first invention) is a former for folding a band-shaped film so that both sides thereof overlap each other to form a cylindrical shape, and a film folded in this cylindrical shape. Is provided in a bag making and packaging machine having a sealing means for welding a predetermined portion of the packaging bag to form a packaging bag, and a chute provided on the former and for charging an article into the packaging bag. The present invention relates to an article pushing member for dropping articles caught in the chute into the packaging bag by entering the chute, the entire shape being formed of a synthetic resin into a flat shape, and a base attached to a swing shaft, and A first arm portion extending from the base portion, a second arm portion extending from the tip end thereof and extending into the chute when swinging, and the first arm portion and the second arm And the cross-sectional shape of the bent portion, the two pipe-like portion extending along the inner circumference and the outer circumference of the bent portion between its 2
It is characterized in that it is substantially I-shaped with a wall-shaped portion connecting the pipe-shaped portion of the book.

Further, according to the invention according to claim 2 (hereinafter referred to as second invention), in the article pushing member according to the first invention, the cross-sectional shape of the distal end of the second arm portion does not cause dent on the surface. It is characterized by having a shape.

Further, the invention according to claim 3 (hereinafter referred to as "third")
The invention is characterized in that the article pushing member according to the first invention or the second invention is formed by a blow molding method.

With the above arrangement, the following effects can be obtained according to the present invention.

First, according to the first invention, the article pushing member is made of synthetic resin, and the cross-sectional shape of the bent portion between the first arm portion and the second arm portion has an inner periphery and an outer periphery of the bent portion. The two pipe-shaped parts along the line and the wall-shaped part connecting the two pipe-shaped parts are almost I-shaped, so that the weight can be reduced and the rigidity can be improved at the same time. Will be.

According to the second invention, in the article pushing member of the first invention, since the cross-sectional shape of the tip of the second arm portion is such that the surface does not have a dent,
Fragments and the like of the packaged material are unlikely to adhere, or even if they adhere, they do not accumulate.

That is, if the cross-sectional shape is I-shaped up to the tip portion that comes into contact with the object to be packaged, a dent is formed on both side surfaces of the end portion, and fragments of the object to be wrapped adhere to the dent and are easily deposited. When the packaged article is a food, a hygiene problem occurs. However, by forming the surface into a shape that does not cause dents as described above, this problem can be avoided.

Further, according to the third invention, the article pushing member according to the first invention or the second invention can be efficiently and inexpensively molded by using the blow molding method.

[0022]

Embodiments of the present invention will be described below.

First, the structure of a bag making and packaging machine 1 provided with an article pushing member according to this embodiment will be described with reference to FIG. 1. The bag making and packaging machine 1 has a box-shaped machine frame 2, and A receiving portion 3 for a film roll a is provided in the portion, and a band-shaped film unreeled from the roll a of the receiving portion 3 is provided on a frame 4 erected from the receiving portion 3 to a front portion of the machine casing 2. A plurality of rollers 5... 5 for guiding b are arranged.

A former 6 is provided at the front of the machine casing 2 to fold both side edges of the film b so as to overlap each other.
And a chute 7 provided to penetrate the former 6 up and down.

The chute 7 has an article supply device X at the top.
A conical portion 7a whose upper end is widely opened so as to receive an article supplied from a conical portion, and a cylindrical portion 7b extending downward continuously from the lower end.

On both sides (only one is shown) of the cylindrical portion 7b of the chute 7, a film feeder 8 for transferring the film b downward, and similarly in front of the cylindrical portion 7b of the chute 7, A vertical sealing device 9 is provided for welding the mutually overlapping side edges of the film b folded by the former 6 to form a cylindrical body c.

Further, below the chute 7, the cylindrical body c is sandwiched from the front and rear and welded in the width direction to close the upper end of the packaging bag into which the articles are put and to close the bottom of the next bag. A horizontal sealing device 10 for forming and cutting in the middle of both welds to separate the bag in which the article is enclosed.
Are arranged.

In addition to the above configuration, the packaging machine 1 is provided with an article pushing member 20 for eliminating the clogging of the articles in the chute 7. Next, the article pushing member 20 will be described.

As shown in FIGS. 2 and 3, the pushing member 20 has a substantially circular base portion 2 made of a synthetic resin containing no reinforcing fibers.
0a and a first arm 2 extending upward from the base 20a.
0b and a second arm portion 20c that is bent from the tip and extends forward, and has a substantially L-shaped shape.

The article push-in member 20 has a structure in which the base 20a is fixed to the holding plate 22 and the receiving plate 2 by bolts 21.
3 is fitted to the drive shaft 25 of the motor 24 and fastened by the nut 26 so as to be attached to the motor 24. The motor 24 is mounted on a base member 27, and a bearing 28 for supporting the drive shaft 25 is fitted and fixed to the base member 27.

Particularly, in the pushing member 20, the first arm portion 20b and the second arm portion 20c
As shown in FIG. 4, the cross-sectional shape of the bent portion 20d that bends between the two pipe-shaped portions 20e along the inner and outer peripheries of the bent portion 20d and the two pipe-shaped portions 20e It is substantially I-shaped with the connecting wall-shaped portion 20f.

As shown in FIGS. 5 and 6, the cross-sectional shape of the tip of the second arm 20c is oval and hollow, with no dent on the surface.

Next, the operation of the bag making and packaging machine 1 will be described.

A belt-shaped film b unwound from a roll a supported by a roll receiver 3 at the rear of the machine frame 2 is guided by each of the guide rollers 5... 5 and transferred to the front of the machine frame 2.
While being supplied from the foremost guide roller 5 'to the former 6, the left and right sides are bent inward by the former 6, and the side edges are overlapped with each other. Then, the film b is fed to the chute 7 by the feeding device 8.
Is transported downward in a state surrounding the lower cylindrical portion 7b, and the overlapped side edges are sealed by the vertical sealing device 9 to form the cylindrical body c.

The tubular body c is sealed in the width direction by a horizontal sealing device 10 below the chute 7 and articles supplied from the article supply device X are passed through the chute 7 with the bottom closed. It is thrown through. The product immediately above the loading portion is sealed in the width direction, and the product loading portion of the cylindrical body c is completely closed and cut off above, whereby the product is sealed in the packaging bag. Is produced and discharged downward. At the same time, the bottom of the succeeding cylindrical body c located above is closed to be ready for the next article.

In addition to the above operation, the article pushing member 20
Operates in synchronization with the operation of putting the article from the article supply device X into the chute 7, and the operation will be described.

Immediately after the article is supplied into the chute 7, the article pushing member 20 is rotated forward by the motor 24 so that the tip of the second arm 20c protrudes into the chute 7, and the chute 7 moves. Forcibly drop the articles in the bag into the packaging bag. In this manner, a predetermined amount of articles is intermittently inserted into the chute 7 from the article supply device X at a constant cycle, and the articles are sequentially sealed in a packaging bag, whereby products are continuously produced.

In particular, the article pushing member 20
According to this, two pipe-shaped portions formed of a synthetic resin and having a cross-sectional shape of a bent portion 20d between the first arm portion 20b and the second arm portion 20c are formed along the inner circumference and the outer circumference of the bent portion 20d. Since the e-shaped portion 20e and the wall-shaped portion 20f connecting the two pipe-shaped portions 20e are substantially I-shaped, the rigidity can be improved while the weight is reduced.

As a result, the article pushing member 20 is
When cyclically reciprocating between the initial position and the position at which the chute 7 enters, the inertia force moves forward when the article pushing member 20 rotates forward and backward when the article pushing member 20 rotates backward. Work, even if stress concentrates on the bent portion 20d, the bent portion 20d
The bending at the bent portion 20d is reduced due to fatigue caused by the article pushing member 20 coming into contact with the chute 7 without accurately entering the chute 7 or by repeatedly generating large deflection. Problems such as breakage are eliminated.

Further, since the article pushing member 20 is formed of a synthetic resin containing no reinforcing fibers, there is no problem that the reinforcing fibers are peeled off from the front end portion which comes into contact with the article to be packaged and mixed into the product. Hygiene problems when the packaged item is a food are avoided. In addition, a metal detector may be installed in the bag making and packaging machine in order to eliminate the intrusion of foreign matter of metal. In this case, however, the metal detector is arranged near the article pushing member 20. Becomes possible.

Further, since the cross-sectional shape of the distal end of the second arm portion 20c of the article pushing member 20 is an oval shape in which no dent is formed on the surface, it is difficult for pieces of the article to be packaged to adhere. Does not accumulate even if attached.

In other words, when the cross-sectional shape is an I-shape up to the tip portion that comes into contact with the packaged object, a dent is formed on both side surfaces of the tip portion. In the case where the packaged object is a food, a hygiene problem occurs. However, the cross-sectional shape of the bent portion 20d, which does not particularly require rigidity, is formed into a shape that does not cause dents on the surface and the rigidity is required. The lettering avoids the above problem.

The article pushing member 20 can be manufactured by a blow molding method. In this case, the cross-sectional shape becomes hollow, and while further reducing the weight,
At the same time, the rigidity is improved and the stress is concentrated.
However, it becomes difficult to bend, and it can be formed efficiently and at low cost.

[0044]

As described above, according to the first aspect, the article pushing member is formed of a synthetic resin, and the cross-sectional shape of the bent portion between the first arm portion and the second arm portion is different from that of the bent portion. The two pipe-like parts along the inner and outer circumferences and the wall-like part connecting the two pipe-like parts are almost I-shaped, so the weight is reduced and the rigidity is improved at the same time. Is achieved, the inertial force due to the periodic reciprocating motion between the initial position and the rush position to the chute acts, even if stress is concentrated on the bent portion, the bending at the bent portion is reduced, and therefore,
Problems such as the article pushing member not contacting the chute accurately and coming into contact with the chute, or the bent portion being broken due to fatigue due to repeated occurrence of large deflection are solved. As a result, the speed of the periodic reciprocation between the initial position and the position of entry into the chute can be increased, and the productivity is improved.

Further, since the synthetic resin does not contain reinforcing fibers, there is no problem that the reinforcing fibers are peeled off from the article pushing member and mixed into the product, and there is a problem of hygiene when the packaged product is a food. Be avoided. In addition, a metal detector may be installed in the bag making and packaging machine in order to eliminate the intrusion of metal foreign matter, but even in this case, the metal detector may be arranged near the article pushing member. It becomes possible.

According to the second invention, in the article pushing member of the first invention, since the cross-sectional shape of the distal end of the second arm portion is such that the surface does not have a dent,
Fragments and the like of the article to be packaged are unlikely to adhere, or do not accumulate even if they do, so that even when the article to be packaged is a food item, the problem of hygiene is avoided.

Further, according to the third invention, since the article pushing member of either the first invention or the second invention is formed by a blow molding method, the thickness is uniform, the inside is hollow, and the weight is further reduced. The rigidity is improved at the same time, the bent portion where the stress is concentrated is less likely to bend, and the molding can be performed efficiently and at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of a bag making and packaging machine provided with an article pushing member according to an embodiment of the present invention.

FIG. 2 is an enlarged side view around the article pushing member in the packaging machine.

FIG. 3 is a sectional view taken along the line AA of FIG. 2;

FIG. 4 is a sectional view similarly cut along the line II.

FIG. 5 is a cross-sectional view similarly cut along the woo line.

FIG. 6 is also a view as viewed from the direction of arrow D;

FIG. 7 is a side view of a conventional article pushing device.

[Explanation of symbols]

 Reference Signs List 1 bag making and packaging machine 6 former 7 chute 10 sealing device (sealing means) 20 article pushing member 20a base 20b first arm 20c second arm 20d bent 20e pipe 20f wall 25 drive shaft (oscillating shaft) ) B film

Claims (3)

[Claims] 1. A former for folding a band-shaped film so that both sides thereof overlap each other to form a cylindrical shape, a sealing means for welding a predetermined portion of the film folded into a cylindrical shape to form a packaging bag, and the former Provided in a bag making and packaging machine having a chute for charging an article into a packaging bag, and pushing into the chute by swinging to drop an article clogged in the chute into the packaging bag. A member having a flat shape formed of a synthetic resin, a base attached to the swing shaft, a first arm extending from the base, and a bend extending from the tip of the base, and extending when swinging. A cross section of a bent portion between the first arm portion and the second arm portion having a second arm portion protruding into the chute has two pipe shapes along the inner and outer peripheries of the bent portion. Department and And a wall-shaped portion connecting the two pipe-shaped portions to form an approximately I-shape. 2. The article pushing-in member according to claim 1, wherein a cross-sectional shape of a tip portion of the second arm portion does not have a dent on its surface. 3. The article pushing member in a bag making and packaging machine according to claim 1, wherein the member is molded by a blow molding method.