JPH0640426A - Method and device for forming package for enclosing article - Google Patents

Abstract

PURPOSE: To realize a package without damage of an article by descending the article to be packed along with a wrapping paper after drawing out a sheetlike packaging paper to locate at the lower side of the article and by folding over the remainder of a packaging paper by an action of a comb member. CONSTITUTION: When a paper ream R is packaged, a sheetlike packaging paper is drawn out to locate at the lower side of the ream R and is held by a plurality of holding devices at its front end. The paper ream R is moved to left together with a wrapping paper 102 in conjunction of these holding devices moved to left by a driving belt and is transferred on a support surface 21a. And the remainder of a wrapping paper 102 protruded from the ream R is folded upwards by a tooth 33 of a comb member 133 which is relatively ascended by descending the support surface 21a, and then is folded over along with the upper surface of the ream R by horizontal movements of the teeth 133, 134 of the successive comb members 33, 34. When the ream R is reached on a conveying belt 41, the wrapping paper 102 is firmly wrapped around the ream R.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method and apparatus for forming a closed package around an article.

[0002]

2. Description of the Related Art A known device of this kind is used for packaging or encapsulating a ream of wrapping paper cut to length. The wrapping paper is prepared by first measuring a corresponding length from the tape-shaped or band-shaped wrapping paper and then cutting it. For this purpose, it is necessary to interrupt the feeding operation of the sheet-shaped or band-shaped wrapping paper. Following the wrapping paper preparation, an encapsulation or wrapping cycle is performed in the encapsulation or wrapping mechanism. Especially in the case of a ream consisting of individual sheets, when wrapping the ream using wrapping paper,
It must be kept in mind that it will not damage the sheets of the ream.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and device for preventing damage to articles during packaging.

[0004]

According to the invention, this problem is solved by a method having the features of claim 1. In the method according to the invention, the article is said flat sheet material, particularly its wrapping paper, with its lower surface resting on said flat sheet material, in proximity to the side substantially corresponding to the coated surface. The sheet material is arranged so that there are laterally protruding portions. The article is then lowered and the flat sheet material is applied to the sides of the article. The flat sheet material is then applied to the top surface of the article by displacing the article laterally. Then of flat sheet material,
The ends moved together are interconnected. by this,
A tubular package will be obtained with only good closure in the face of the article to be packaged.

As an advantage, in order to ensure that the flat sheet material is applied to the sides of the article in a completely satisfactory manner, when the article is lowered, it is stiffened by the compressive forces acting on the top side of the article. . This is particularly advantageous in the case of a ream consisting of individual sheets, since by applying a compressive force any displacement of the individual sheets can be prevented when applying the wrapping paper.

As an advantage, a larger protruding portion of the flat sheet material is pulled out of the stationary support portion or seat surface portion when the article is lowered or displaced. In order to ensure that the flat sheet material is applied to the article in a crease-free manner, a larger portion of the flat sheet material is pulled from the fixed support portion against the force of the holding means. Maintaining the flat sheet material in a stretched or tensioned state when applying the flat sheet material to the top surface of the article improves the condition of the flat sheet material applied, particularly near the front upper edge of the article. It This ensures that when the article is displaced relative to the flat sheet material, the sheet material can be reliably applied to the top surface of the article without folds.

In order to prevent wrinkling of the individual sheets of the ream near the front upper edge, when applying the flat sheet material to the upper surface of the article, the flat sheet material is placed close to the top edge of the article on the flat sheet material. We propose to make a lateral crease. Said transverse folds can be made on a flat sheet material which is displaced vertically and / or transversely to the upper edge of the article.

According to the development of the invention, the article is advantageously supplied with a flat sheet material prior to the packaging step.
There is a flat sheet material feed stage. Thereby, during the feeding operation, the article is protected by the flat sheet material placed on it.

During the feeding of the flat sheet material, the feeding operation is interrupted by connecting the flat sheet material to the flat strip material, which is separated by the inhibition of the feeding mechanism for the flat sheet material, by means of perforations. Elimination of cutting and cutting of flat sheet material. Advantageously, a flat sheet material can be sized and perforated from a flat strip material during the packaging step for the preceding article. As a result, since it is not necessary to stop the supply operation of the wrapping paper or the article to perform the perforation separation, a series of high-speed feeding of the article to be packaged becomes possible.

It is an advantage that the article can be positioned relative to the sheet material as it is fed.

At the time of application of the flat sheet material, at least one of the protruding parts is provided with a strip-shaped adhesive which is advantageously applied close to the edges. The band-shaped adhesive then allows the closing of the end portions of the wrapping papers which have been brought together to form a tubular wrap.

The device according to the invention has a two-part seat or bearing surface with an adjustable seat or bearing portion and a fixed seat or bearing portion. The support surface is preferably horizontally oriented and provided with a vertically adjustable support portion. At the beginning of the packaging step, a flat sheet material is spread on the support surface and the articles to be packaged are placed on the flat sheet material. The article may be arranged such that one of its eigenplanes is level with the line of separation between the two support portions. When the movable support portion is lowered, the article is also lowered so that the flat sheet material resting on the fixed support portion is applied to the side of the article.

According to another development, the adjustable support part has a recess into which an actuating means for applying a flat sheet material to the article is introduced during the adjustment of said support part. This causes the flat sheet material to be applied to the other side of the article using said means of action. Said actuating means can be constituted by two combs adjustable relative to each other. The relative adjustment of the combs can result in the article being provided with a portion of flat sheet material that projects slightly above the top surface of the article.

In a further development, the actuating means can be moved into the recess of the adjustable support part. This allows the article to be laterally displaced using the action means to apply a flat sheet material to its upper surface.

Particularly advantageous in the case of a ream consisting of individual sheet papers, the side of the article is ensured so that it is ensured that the flat sheet material on the side of the article is not damaged. A pressing means for exerting a compressive force is provided. The pressing means may be constituted by, for example, an air-operated plunger or a piston. The pressing means are advantageously movable vertically with respect to the adjustable support part and are preferably arranged on a guide or a grip.
The pressing means are used only in the phase of the encapsulation stage where flat sheet material is applied to the sides of the article.

According to a further development, the pressing means can be constructed with deflecting means, preferably with deflecting edges, in order to provide a lateral fold in the flat sheet material. The deflecting means can be arranged on the article or in a state of being laterally displaced with respect to the upper edge of the article. This ensures that the flat sheet material is applied particularly well in the vicinity of the upper edge of the article, so that individual sheets are prevented from being damaged, especially in the case of a paper run.

In order to ensure that the flat sheet material is accurately applied to the article, the article must be positioned with respect to the sheet material. A support is advantageously arranged adjacent to the support surface, said support being associated with an adjustable stop for the articles. The stop has a side guide for placing the article. The guide places the article such that one of its sides is on the separation line between the two support parts prior to the actual packaging step.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

1 or 3 is a sheet-like wrapping paper 10 below.
FIG. 4 is a diagram showing an apparatus for wrapping a strip R with a flat sheet material, which may be made from a material other than paper, referred to as 2. The device is configured as an automatic packing machine. The illustrated packing machine has a lifting platform 50 on which a plurality of paper reams R are stacked in a stacked state. Each of the individual sheet reams R is separated at one end by the insertion S. The rising platform 50 is vertically movable in the direction of arrow 51. The ascending table 50 always has the thickness H of the paper run R.
Driven so as to move one by one, the bottom part of the uppermost paper ream R is in a plane state together with the support base 1 adjacent to the rising base 50.

The support base 1 has a substantially L-shaped cross section, and is a horizontal support surface for the paper run R. Support stand 1
Underneath is a feeding mechanism 17 for feeding and measuring the wrapping paper or the flat strip or tape-like material 2.
The supply mechanism 17 has two rewinding rolls in a superposed state in which a drive device (not shown) is arranged. As a result of the rotational movement of the unwinding roll, the strip-shaped wrapping paper 2 is pulled out from the wrapping paper winding frame 16. On the guide pulley 52, the strip-shaped wrapping paper 2 is deflected in the direction of the supply mechanism 17. The rewinding roll of the supply mechanism 17 is connected to a measuring device (not shown) so that the length of the supplied band-shaped wrapping paper 2 can be accurately measured.

Along with the supply mechanism 17, a horizontal perforation E passing through the strip-shaped wrapping paper 2 intersecting the longitudinal direction of the strip-like wrapping paper 2 is formed.
A cutting device 18 is provided which is controllably provided in the. The lateral perforations E in the strip wrap 2 are chosen so that the strip 2 still has adequate safety. In practice, good results are obtained when the lateral perforations have cuts with a length of about 50-60 mm interrupted by bridges with a length of 1-3 mm.

A tension pulley or idler pulley 19 is provided which is laterally displaced from the cutting device 18 and is adjustable in the direction of the double-headed arrow 53. The strip-shaped wrapping paper 2 sent from the cutting device 18 is deflected by the tension pulley 19 and placed on the upper surface of the support base 1. The function of the tension pulley 19 is to maintain the strip-shaped wrapping paper 2 supplied by the supply mechanism 17 in a tensioned state. For example, a tension pulley 19 to which gravity or spring tension is applied may be provided. Tension pulley 19
This is achieved by matching the height position of the with the length of the unwrapped wrapping paper 2. Tension pulley 1
The two operating positions of 9 are shown in FIG. 1 and in each case adapted to different work cycles of the packing machine. When the tension pulley 19 is in the lower position shown by the broken line, the strip-shaped wrapping paper 2 moves past the sensor 22 that determines the position of the tension pulley 19.

On the support base 1, a support portion or a beam portion 1 of a support structure (not shown) fixed to the base portion of the packing machine.
There are 0,110. The horizontally oriented beam portions 10 and 110 are arranged parallel to each other. As shown in FIG. 2, the beam portion 1
Guides 9, 109 and 209 are held on 0 and 110. The guide portions 9, 109, 209 are provided with beam portions 10, 11
0 has a substantially rectangular hollow body that is adjustable. By adjusting the outer guide portions 9 and 109, it is possible to adapt to the format of the paper run R.

In any case, on the guide portions 9, 109, 209, a gripping device 6, which is bare-like in the conveying direction of the sheet ream R, is formed.
7, 8 are provided. As shown in FIG. 1, the gripping device 6 having the same structure as the gripping devices 7 and 8 has a barbed gripping arm. The gripping arm of the gripping device 6 forms a receiving portion for the sheet ream R supplied by the lifting platform 50. As shown in FIGS. 2 and 3, the gripping devices 6, 7 have the same dimensions, but the gripping device 8 is much smaller because only the strip wrap 2 is secured between its gripping arms.

The gripping devices 6, 7 and 8 can be operated in a synchronous state in the direction of an arrow 54 which also indicates the conveying direction of the sheet ream R.
Regarding the structure of the gripping device drive device, the case of the gripping device 6 will be described with reference to FIG. A continuous belt 13 and the like are arranged in the guide portion 9 formed as a hollow body. The belt 13 is a pulley 1 that is arranged at intervals.
You will be guided around 1 and 12. The pulley 12 is driven by a drive belt 14 connected to a central drive device (not shown).

The belt 13 is connected to the gripping device 6 by means not shown. Pulley 12 drives belt 1
When driven by 4, the gripping device 6 can be moved from the position of the broken line to the position of the solid line in the direction of the arrow 54.

1 and 3 with a stop 15,15 arranged vertically on the top of the support base 1, which is a descendable stop, for example arranged on the device carrying the gripping devices 6,7. is there. From the plan view of FIG.
It can be seen that 15 are arranged with an interval corresponding to the size of the paper run R. Each stop 15, 115 is a paper run R
It has a side guide plate 55 for use. As a result of the inclined shape of the free end of the guide plate 55, an insertion portion having a tapered cross section in the direction of the arrow 54 is formed with respect to the paper run R.

Pulleys 3, 103 are mounted on a common shaft or shaft, displaced laterally with respect to the stops 15, 115, each pulley being provided with a return stop. The pulleys 3 and 103 support the band-shaped wrapping paper 2 on the support base 1
Keeps engaged on the top of the sheet and prevents the strip 2 from returning.

In the case of the rectangular paper strip R, the orientation is performed so that the narrow side of the paper strip R faces the support base 1. As shown in FIG. 3, the long side 4, 104 of the paper run R is provided with the stop portion 1.
It is received between 5,115 guide plates 55.

The illustrated packaging machine has a receiving surface 21 which is spaced from the support 1. The support surface 21 has a structure composed of two parts. One support portion 21a is vertically adjustable, while the adjacent support portion 21b is fixed. A separation line or division line 61 is arranged between the support portions 21a and 21b. A plurality of parallel recesses 26 are provided in the rectangular support portion 21a in plan view. Each of the recesses 26 has a rectangular cross section.
The longitudinal axis of the intersects with the transport direction of the paper run R indicated by the arrow 55. The vertical adjustment of the support part 21a is carried out by an adjustment mechanism 27 which is interconnected, for example by a drive shaft 28, and which may each have a crank connected to the underside of the support part 21a by a connecting rod. Be done. From FIG. 1 it can be seen that there are two parallel axes 28 driven by belts 29, 30 or chains. The belt 30 is connected to a driving device (not shown). During operation, the support portion 21a moves in the direction of the double-headed arrow 56 as a function of drive direction.

A support portion 21a is provided on the guide portions 9 and 109.
Air-operated piston 3 operable in the direction of upward movement of the
1, 32 are fixed. From FIG. 2, it can be seen that the pistons 31, 32, which are at a constant distance from the side edge of the paper run R, engage with the surface of the paper run R. As a result, the side portion of the paper strip R is maintained in a rigid state during the packaging cycle, and is protected from wrinkling when the sheet wrapping paper 102 is applied.

Below the support portion 21a there are combs 33, 34 associated with the recess 26. The combs 33, 34, which are arranged in pairs in the recess 26 and whose design is inferred from FIGS. 2 and 4, are arranged perpendicular to the support part 21a and have dimensions suitable for the cross section of the recess 26. Have teeth 133,134 with. According to FIG. 1, when the supporting portion 21 a is lowered, the teeth 133 and 134 are introduced into the recess 26. The base members of the comb-shaped portions 33 and 34 are
It is displaceably guided on the horizontally oriented guide portion 35. The guide 35 is oriented parallel to the recess 26 of the support portion 21a and is supported on the bottom of the packing machine. Figure 2
The comb 33 is adjustable in the direction of the double-headed arrow 57 by a drive chain 36, as shown in FIG. Comb 3
The adjustable connecting member 37 for connecting the comb 3 to the comb-shaped portion 34 guides the comb-shaped portion 34 when the comb-shaped portion 33 is adjusted so that the comb-shaped portions 33, 34 can be adjusted relative to each other in opposite directions. It will be possible. Although the teeth 133 of the comb-shaped portion 33 are linear,
The four teeth 134 have an inverted L-shape. The horizontal leg of the tooth 134 extends on the surface of the vertical leg of the tooth 133 of the comb 33.

By the adjusting mechanism 39, the comb-shaped portions 33, 34 and the guide portion 35 thereof can be adjusted in the vertical direction with respect to the support portion 21a. The adjusting mechanism 39 may have, for example, an inductive slide whose height can be adjusted manually or automatically.

As shown in FIGS. 2 and 3, the fixed support portion 21b is a vertically adjustable support portion 21a.
It is displaced laterally with respect to and is separated from the support portion by a separation line 61. The support portion 21b has a lattice structure in the illustrated embodiment. Support portion 21b
The lattice structures of are all made up of lattice girders 58, which have a circular cross-section and are assembled in parallel at intervals. A support rail 59 having a rectangular base surface is arranged adjacent to the support portion 21a. Grid 58
And the support rail 59 have the same length as the vertically adjustable support part 21a.

As is particularly apparent in FIG. 4, on the support rail 59 is arranged the brush 24 which is oriented perpendicular to said support rail 59. The handle of the brush is connected to a driving device 25 fixed on the guide portion 109.
The height of the brush 24 can be adjusted, for example, by an air-operated drive 25. The wrapping paper 209 placed on the support portion 21b can be fixed by the brush 24. A narrow strip-shaped adhesive having a nozzle is provided on the guide portion 29 and the edge portion 5 of the sheet-shaped wrapping paper 102 is covered.
An adhesive dispenser 23, which can be applied parallel to, is fixed.

FIG. 4 shows a slightly modified embodiment in which the piston 32 has an L-shaped cross section and is provided with deflecting edges 132 on the horizontal legs. The deflecting edge 132 at the lower position of the piston 32 projects slightly above the long side 4 of the paper run R. As a result, the sheet wrapping paper 102 can be applied to the top of the paper ream R in a tensioned state. further,
The lateral folds formed on the sheet-shaped wrapping paper 102 allow the sheet wrapping paper 102 to be reliably applied to the upper edge portion 62 of the paper strip R in a good state without wrinkles. As a result, in particular, when the sheet-shaped wrapping paper is applied, the sheet paper of the paper strip R is prevented from wrinkling.

Below the support portion 21b are two conveyor belts 38, 41, both oriented horizontally and spaced from each other. The paper strip R is fed from the support portion 21a by the transport belts 38 and 41 which are driven in the opposite direction. The upper conveyor belt 38 is adjustable in the vertical direction with respect to the lower conveyor belt 41. Upper conveyor belt 38
Is also movable horizontally.

In the embodiment according to FIGS. 1 to 4, the conveyor belt 38 is associated with a deflection rod 40 which is arranged horizontally and has a U-shaped cross section. Deflection rod 40 arranged at the same level as upper conveyor belt 38
Is horizontally adjustable. As a result, as shown in FIG. 4 in particular, it is possible to provide the sheet-shaped wrapping paper 102 with a lateral fold line at the deflecting edge portion 132. This is accomplished by pressing the sheet-shaped wrapping paper 102, which is held by the brush 24 on the support portion 21b, onto the deflecting edge 132 and deflecting it thereon. The lateral folds allow the sheet-shaped wrapping paper 102 to be applied to the front edge of the paper strip R without causing any obstacle.

The deflection rod 40 is not provided in the embodiment of FIG. 6, which is otherwise identical to that of FIG. In this case, the upper conveyor belt 38 is connected to the piston 32.
By moving to the deflecting edge 132 of the sheet wrapping sheet 102, a lateral fold is provided. Thus, one end of the conveyor belt 38 replaces the deflection rod.

The lower transport belt 41, which is longer than the upper transport belt 38, is connected to another transport means 43 that leads to a device for closing the front and rear portions of the package.

The implementation of the method associated with the above embodiment is described below.

First, the strip-shaped wrapping paper 2 to the sheet-like wrapping paper 1
The 02 supply and measurement method steps will be described. This method step is substantially the same in all embodiments and will be described with particular reference to FIGS.

According to FIGS. 1 and 7, the uppermost paper string R is moved from the raising table 50 to the stoppers 15, 1 on the adjacent supporting table 1.
Move to 15 manually or automatically. by this,
The leading edge portion of the paper strip R engages with the stoppers 15, 115.
The band-shaped wrapping paper 2 is guided from the supply mechanism 17 to the point B on the top of the support base 1. The end portions of the band-shaped wrapping paper 2 are maintained on the top of the support base 1 by the pulleys 3 and 103 shown in FIG.

In the paper run R held laterally by the guide plates 55 of the stoppers 5 and 115, the long side 4 of the paper run R has a separation line 61 between the supporting portions 21a and 21b of the support surface 21. It is positioned so that it is placed at the same level as. Even when the format is changed, the long side 4 of the paper run R is at this position. The distance D1 between the longitudinal side 4 of the strip R and the edge 5 of the strip wrap 2 is such that the side of the strip R and its top can consequently be covered by the wrapper. Long side 1
The distance D2 between 04 and the wrapping paper edge portion 105 is the same as the height H of the paper run R increased by about 40 mm.

With the packing machine, 530 to 1400 mm
A wrapping paper package or envelope can be applied to the paper run R having a length L of 12 and a height H of 12 to 80 mm. In order to wrap such a paper strip R, the sheet-shaped wrapping paper 102 having the length S must be provided. As a function of the desired package, the length can be S = L + 2H + 80 mm. As a result, the sheet wrapping paper 102 projects above both the front edge portion and the rear edge portion of the paper strip R. The protruding length of the sheet-shaped wrapping paper 102 differs depending on how to close the packaging body of the wrapping paper.

The gripping devices 6, 7, 8 on the guides 9, 109, 209 grip the edge of the strip of paper 2 or the strip-shaped wrapping paper 2 arranged below it. As can be seen from FIGS. 2 and 3, the smaller gripping device 8 grips only the strip wrapping paper 2 or the sheet wrapping paper 102. By supplying the paper run R together with the sheet-shaped wrapping paper 2, the paper run R can be protected during the supply.

The feeding mechanism 17 is operated to measure the sheet wrapping paper 102, and then the corresponding strip wrapping paper 2 is rewound from the wrapping paper winding frame. The strip-shaped wrapping paper 2 deflected by the guide pulley 52 is arranged between the rewinding rolls of the supply mechanism 17 which can be driven. According to the position of the solid line, the strip-shaped wrapping paper 2 which is at its initial position prior to the measurement and punching is sent from the supply mechanism 17 to the top of the support base 1 through the cutting device 18, and at the intervening tension pulley 19. Biased.

Preparation of the sheet wrapping paper can be done in two different ways. In the first method, first, the feeding mechanism 1
By the rewinding roll of No. 7, length S1 = S- (AC + C
B) is rewound. From FIG. 7, it is possible to infer the positions of points A, B and C or the intervals between them. Point A
Indicates the position of the cutting device 18. The point B indicates the position of the end edge portion or the separation portion of the strip-shaped wrapping paper 2, and the point C indicates the position of the front edge portion of the paper strip R formed by the stoppers 15, 115. Length S
At the time of rewinding 1, the band-shaped wrapping paper 2 is maintained in a tension state by the tension pulley 19 in which the band-shaped wrapping paper 2 is pressed against the top of the band-shaped wrapping paper 102 by its own weight. When the length S1 is unwound and the length S is located between the cutting device 18 and the point B, the cutting device 18 is activated. As a result, the strip-shaped wrapping paper 2 has a perforation E in the lateral direction at right angles to its longitudinal direction.
Is provided. The transverse perforations E are such that the strip-shaped wrapping paper 2 can be exposed to tensile stress even after the perforations have been provided and that it can be kept in a transportable state thereafter.

When the lateral perforation E is provided, another length S2 is subsequently rewound by the supply mechanism 17 so that S2 = AC + CB. According to this method step, the strip wrap 2 is in the position of the dashed line shown in FIGS. Therefore, the lateral perforation E is still upstream of the tension pulley 19 in the moving direction of the strip-shaped wrapping paper 2. The length S of the sheet-shaped wrapping paper 102 corresponds to the distance between the point E and the point B. The distance between points A and E is
Is the same as the distance between.

At this point, the tension pulley 19 located at the lower position of the belt guides the strip-shaped wrapping paper 2 through the sensor 22 which protects the perforation E in the lateral direction. Accurate length cutting to cut into lengths S1 and S2 is performed by the feeding mechanism 1
The rewinding roll of No. 7 is provided as a measuring roll and is connected to the measuring device connected to the control device for the supply mechanism.

In another form of the preparatory work for the sheet-shaped wrapping paper 2 according to FIG. 9, the length of the sheet-like wrapping paper is set by adjusting the cutting device 18 to adjust the length of the band between points A and B. It is provided by making the length the same as the length S of the sheet wrapping paper 102. Therefore, this alternative form of the method can be carried out in a single pass.

The structure according to FIG. 9 corresponds to that of FIG. 7, with the following differences.

The rewinding / measuring roll of the supply mechanism 17, the tension pulley 19, and the cutting or punching device 18 are
It is located on a vertically adjustable slide 99 whose length S = AB is adjusted by adjusting it. The tension pulley 19 is provided upstream of the cutting device 18 and downstream of the supply mechanism 17 in the paper supply direction. The resulting “accumulated amount” is “dissolved” when the paper string R is conveyed. As shown in FIG. 7, measurement is performed when the tension pulley reaches its upper position. Further, the tension pulley 19 and thus the "accumulated portion" may be provided downstream of the cutting device as shown in FIG. In the case of this structure, a wrapping paper reverse slide prevention pulley 3 having a free wheel is arranged upstream of the horizontal portion of the support base.

Preparation of the sheet-shaped wrapping paper 102 of a corresponding size is continuously performed during the packaging cycle during the operation of the packaging machine. As a result, the supply operation of the sheet-shaped wrapping paper 102 or the paper string R can be performed without interruption, so that the productivity can be improved. Sheet wrapping paper 102
To separate the sheets, it is sufficient to stop the strip-shaped wrapping paper 2 while continuing the supply operation of the sheet-like wrapping paper 102.

The packaging cycle will be described below. The paper strip R is provided with a tubular or closed packaging body or sealing body. To completely close the strip R at the end of the packaging cycle, all that is required is to close the front and back with a corresponding folding method.

At the beginning of the packaging cycle, the paper strip R is in the position of the dashed lines in FIGS. The front portion of the paper string R is engaged with the stoppers 15 and 115 of the stopper. The strip-shaped wrapping paper 2 prepared by the supply mechanism 17 or the cut sheet paper 102 is at the position indicated by the broken line. Therefore,
The tension pulley 19 is in the lower position.

When the paper ream R is supplied so as to face the stoppers 15, 115, the gripping devices 6, 7, 8 are closed. At the same time, the displacement of the gripping device is started in the direction of arrow 54. The gripping devices 6, 7, 8 are driven by drive belts 13, 14 driven by a drive device (not shown).
All of the gripping devices 6, 7, 8 operating in synchronization are guided on their own guides 9, 109, 209. When the paper strip R moves in the direction of arrow 5, the strip runs together with the sheet wrapping paper 102 from the support base 1 to the adjacent support surface 2.
Sent to 1. According to FIG. 1, the vertically adjustable support part 2 is now in its upper position at this point.
1a supports both the paper strip R and the strip wrapping paper 2. The longitudinal side 4 of the paper strip R is at the same level as the separation line 61 between the support portion 21a and the support portion 21b, and only the strip-shaped wrapping paper 2 is placed on the support portion 21b.

When the sheet ream R is fed to the support surface 21, the tension pulley 19 rises vertically. The passage of the perforation E in the lateral direction is detected by the sensor 22. Before the gripping devices 6, 7, 8 complete their displacement operations, the tension pulley 19 reaches its upper end point position and
According to 7 and 7, the strip-shaped wrapping paper 2 comes to the position indicated by the solid line. By pulling the gripping devices 6, 7, and 8, tensile stress in the longitudinal direction is applied to the strip-shaped wrapping paper 2. In order to prevent the rewinding roll of the supply mechanism 17, the lateral perforations hold the belt-shaped wrapping paper 2 on the top of the support base 1 and the pulleys 3 and 10.
After passing through 3, the lateral perforations E are consequently separated exactly. Separation of the perforations E in the lateral direction takes place at point B of the support 1. Then, the strip-shaped wrapping paper 2 comes to the position of the solid line representing the initial position in FIGS. This ensures that the lateral perforations E are separated exactly at point B where the front edge of the strip 2 was previously located.

A particularly precise separation is obtained in the case of a lateral perforation E with a cut of about 50-60 mm with a bridge of about 1-3 mm between the cuts. Further, such a lateral perforation E makes it possible to properly bring the strip-shaped wrapping paper 2 into a stable state.

As can be seen from FIG. 8, the sheet-shaped wrapping paper 1
02 protrudes beyond both the front edge and the rear edge of the paper strip R, and the protruding length depends on the folding method selected to completely close the package.

During the feeding operation of the paper strip R on the support surface 21, the adhesive distributor 23 applies the adhesive strip in the strip wrapping paper 2 or the sheet wrapping paper 10 adjacent to the edge portion 5. Paper strip R and sheet-like wrapping paper 12 arranged below it
When and are completely placed on the support portion 21a, as shown in FIG. 1, the gripping devices 6, 7, 8 are opened. While the transfer operation is further performed in the direction of arrow 55, the gripping devices 6, 7,
8 moves in a direction away from the paper string R. Finally, the gripping devices 6, 7, 8 come to the position of the gripping device 6 shown by the solid line in FIG. At least one of the gripping devices 6 and 7 is appropriately provided with a measurement detector so that the height of the paper run R can be determined. In this way, the packing machine can be stopped in the case of an abnormality.

At the start of the packaging stage of the paper run R, the run is in the position shown in FIG. 1 and the support portion 21a is in its upper end position. In FIG. 2, the position of the paper run R or the sheet-shaped wrapping paper 102 at the start of the packaging cycle is shown by a broken line. The adjustment device 27 allows the support part 21 to be lowered vertically downwards. Since the pistons 31, 32 are close to the long side 4, 104,
The paper run R and the sheet-shaped wrapping paper 102 are firmly held on the support portion 21a so that the side portions of the paper run R are maintained in a rigid state. Therefore, no wrinkling occurs when the sheet-shaped wrapping paper 102 is applied. According to FIG. 2, at the time of lowering the support portion 21a, the sheet-shaped wrapping paper 102
Is applied to the long side 4 of the paper run R. The sheet-shaped wrapping paper 102 unfolded by the brush 24 has a supporting portion 21b.
It is held on and deflects on the support rail 59 and the deflection rod 40 by said support part.

When the supporting portion 21a is lowered, the teeth 133 and 134 of the comb-shaped portions 33 and 34 arranged in pairs are moved to the supporting portion 21a.
It is introduced into the recess 26 of a. The comb-shaped portions 33 and 34 are previously arranged by the adjusting device 39 in the longitudinal side 104 of the paper run R.
It was located at a fixed distance from. In this way, when the support portion 21a is lowered, the laterally protruding small portion of the sheet-shaped wrapping paper 102 is applied to the long side 104 of the paper strip R (FIG. 2). Therefore, the end portion of the sheet-shaped wrapping paper 102 is close to the long side 104 and slightly protrudes above the top of the paper ream R. The teeth 133,134 are initially in the position shown in FIG. 2 such that the surface of the horizontal leg of the tooth 134 aligns with the outer upper surface of the vertical leg of the tooth 133, thereby providing an effective Teeth of various heights can be extended.

The following method steps can be particularly clearly understood from FIG. The adjusting device 37 is controlled so that the comb portions 33 and 34 are brought together. The horizontal leg of the tooth 134 is placed on the short edge of the sheet-shaped wrapping paper 102 that protrudes above the top of the paper run R.

In a series of automatic high-speed operations of the individual process steps, the long edge of the sheet-shaped wrapping paper 102, which remains on the support part 21b, is placed on top of the paper web. When the lowering process of the support portion 21a is completed, the piston 32
Is slightly lifted from the top of the paper string R. Piston 32
Is preferably placed a few millimeters above the top of the paper run R, for example 2-3 mm. Then, as shown in FIG. 4, the deflecting edge portion 132 of the piston 32 is laterally projected onto the longitudinal side 4 of the paper run R. Then, the deflection rod 40 arranged below the support portion 21b is guided opposite the sheet-shaped wrapping paper 102 so as to press the sheet-shaped wrapping paper 102 against the deflection edge 132. As a result, the sheet-shaped wrapping paper 102 held by the brush 24 on the support rail 59 is provided with a lateral fold line, and the fold line provides the tension at the front longitudinal edge of the sheet-like wrapping paper sheet 102. The state of the sheet-shaped wrapping paper 102 applied to the upper front edge portion 62 of the ream R is improved, so that the wrinkle of the ream is particularly prevented. As a result, it is not necessary to use the piston 32 on the top of the paper run R, and the paper run R can be directly transferred under the drive of the teeth of the comb-shaped portion 33.

In order to apply the sheet-like wrapping paper 102 to the top of the paper run R, the paper run R is displaced by the displacement of the comb-shaped parts 33 and 34 in the direction of arrow 60 intersecting the feeding operation. Be done. The conveyor belts 38 and 41 arranged under the support portion 21b move at the same speed as the comb portions 33 and 34. When the front part of the paper string R reaches the conveyor belt 41, the conveyor belt 38 is lowered to the top of the paper string R. When the paper string R is moved, the sheet-shaped wrapping paper 102 is continuously applied to the top of the paper string R by the transport belt descending. In the corresponding step, the deflection rod 40 is retracted and the piston 32 is moved to its upper position. The brush 24 is also
It rises so that it does not come into contact with the strip-shaped adhesive applied to the sheet-shaped wrapping paper 102.

FIG. 5 shows a state in which the tooth 134 has come immediately before the conveyor belt 38 and the passage of the comb-shaped portion 34 has been completed. However, the comb 33 continues to operate, moving progressively away from the comb 34 and finally,
As shown by the solid line in FIG. 5 and according to FIG.
It comes to the end point position corresponding to the initial position of 34. As a result, the upper rear edge of the sheet-shaped wrapping paper 102 held by the teeth 134 of the comb-shaped portion 34 is gradually peeled off from the teeth 134. The packaging step ends when the conveyor belt 38 connects the two edges at the strip adhesive. Then, the comb-shaped portion 33 stops, and then the comb-shaped portion 34
With that, it returns to the non-actuated position.

When the paper run R reaches the conveyor belt 41 completely, the sheet wrapping paper 102 is completely wrapped around the paper run R and fixed to the run. After that, paper R
Is delivered to the transport mechanism 43 and sent to a device for closing the end of the tubular wrapping paper. Then, the conveyor belt 38 returns to its upper position, and the supporting portion 21a is also returned upward.
The cycle can then be repeated.

In the embodiment according to FIG. 4, in the absence of the deflection rod 40, the conveyor belt 38 completes the function of said rod. Therefore, the conveyor belt 38
The edge of the fold provides a fold line on the sheet of wrapping paper 102 located between it and the deflecting edge 132. The pressure of the conveyor belt 38 against the deflecting edge 132 may then be reduced but must be maintained. At this position, the operation of applying the sheet-shaped wrapping paper 102 to the paper strip R is started by operating the conveyor belt 38. The conveyor belt 38 is then moved away from the piston 32 or its deflecting edge 132 so that the piston 32 is released. The subsequent method steps are basically the same as in the embodiment described above.

At the supply portion of the strip-shaped wrapping paper 2, when the packaging cycle is carried out, the corresponding sheet-shaped wrapping paper 102 is cut into lengths in the above-described manner and prepared, and then the wrapping cycle is carried out. In this way, the supply of the paper ream R and the packaging can be performed without interruption. Horizontal hole E
The sheet-shaped wrapping paper 10 connected to the strip-shaped wrapping paper 2 by
2 is separable at the time of supplying the paper string R, and the gripping device 6,
It is possible to continue supplying operation to 7 and 8.

[Brief description of drawings]

1 is a side view showing a partial cross-sectional view of an embodiment of a device according to the invention.

2 is a view of the embodiment in the direction of arrow II in FIG.

FIG. 3 is a plan view of the embodiment of FIG.

FIG. 4 is a diagrammatic view of another example packaging mechanism at different method steps.

FIG. 5 is a diagrammatic view of another example packaging mechanism at different method steps.

FIG. 6 is a diagram showing another modification of the packaging mechanism.

FIG. 7 is an enlarged view showing a supply device of the device according to FIG.

FIG. 8 is a diagram showing an arrangement of the article R on the sheet-shaped wrapping paper 102 performed prior to the packaging cycle.

9 is a diagram showing a modification of the details of FIG. 7. FIG.

[Explanation of symbols]

 R article 1 support base 2 sheet material 6,7,8 gripping device 17 supply base 21 support surface 21a movable part 21b fixed part 31,32 pressing means 33,34 action means 133,134 teeth 9,109,209 guide part

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Faust Pizzi Italy E Bologna Es Giovanni Persiceto Via Marconi 8 (72) Inventor Valerio Palinini Italy I Bologna Es Giovanni Persiceto Corso Italia 145

Claims (18)

[Claims] 1. The flat sheet material (10) spread such that there is a laterally protruding portion of the flat sheet material (102) proximate the sides (4, 104) of the article (R).
2) placing said article (R) on top of which its lower surface, which substantially corresponds to the covering surface, is placed; and lowering said article (R), whereby said side surfaces (4, 10)
4) applying the flat sheet material (102); applying the flat sheet material (102) to the top of the article (R) by lateral displacement of the article (R); Combining the ends of the sheet material (102) together and interconnecting the ends, forming a closed package around the article (R). 2. The step of lowering the article (R), wherein the side surface (4, 104) of the article (R) is stiffened by using a compressive force acting on the top of the article (R). The method described in. 3. When the article (R) is lowered and / or displaced, preferably against the force of the holding means (24),
A method according to any of the preceding claims, characterized in that a larger protruding portion of the flat sheet material (102) is pulled out from the stationary support portion (21b). 4. The flat sheet material (102), when applied to the top of the article (R), is scored laterally proximate to the article upper edge (62). The method of any of the preceding claims, wherein: 5. A number of flat sheet materials (102) are connected to each other by perforations (E) when the flat sheet material (102) is supplied for packaging the article. Forming a flat strip of material (2) and separating it from the strip during the feeding of the flat sheet material (102), in particular by blocking the feed mechanism (17) for the strip (2); The method of claim 1 characterized. 6. The strip-shaped adhesive portion, which is advantageously applied in proximity to the edge (5), is provided on at least one projecting portion of the flat sheet material (102) during application. The method of any of the preceding claims, wherein the method comprises: 7. An unfolded flat sheet material (102)
A horizontal support surface (21) consisting of two parts, on which the article (R) is placed with its lower surface placed on it.
A horizontal support surface including a movable part (21a) and a fixed part (21b); for the movable part (21a) of the support surface (21) on which the article (R) is arranged Descending means (27) for applying the flat sheet material to the side surfaces (4, 104) of the article (R); displacing the article (R) laterally. This causes the lateral displacement means (33, 34, 3) by which the flat sheet material (102) is applied to the top of the article (R).
8, 41) and; interconnecting means (38) for interconnecting the ends of said flat sheet material (102), a device for forming a closed package around an article. 8. The movable support portion (21a) is preferably adjustable in the opposite direction to apply the flat sheet material (102) to the article (R) during adjustment of the support portion (21a). 8. Device according to claim 7, characterized in that it has a recess (26) into which an actuating means (33, 34) consisting of two distinct combs (33, 34) is introduced. 9. The first comb-shaped part (33) is provided with substantially L-shaped teeth (133), and the second comb-shaped part (34) is provided with inverted L-shaped teeth (134). The apparatus of claim 8 characterized. 10. Pressing means (31, 32) exerting a compressive force on the sides of the article (R), preferably pneumatically actuated pistons (31, 32), are provided on the movable support part (21).
Device according to any of claims 7 to 9, characterized in that it is associated with a). 11. A guide for the pressing means (31, 32) is movable vertically with respect to the adjustable support part (21a) and preferably for a gripping device (6, 7, 8). Device according to claim 10, characterized in that it is arranged on a part (9, 109, 209). 12. The pressing means (31, 32) further comprises a deflection rod (40) which is preferably adjustable relative to itself to provide lateral folds in the flat sheet material (102). Device according to claim 10 or 11, characterized in that it comprises deflecting means (132). 13. The flat sheet material (102) preferably associated with the adjustable support portion (21a).
13. Device according to any one of claims 7 to 12, characterized in that the fixed support part (21b) has a lattice structure with support rails (59) for it. 14. Conveying means (38,41) arranged below the fixed support part (21b) for taking over the article (R) sent from the adjustable support part (21b). ) Is further included.
The device according to any one of 1 to 13. 15. The flat sheet material (10) having gripping devices (6, 7, 8) with controllable gripping arms.
Device according to any of claims 7 to 14, characterized in that it further comprises a supply means for supplying 2) and the article (R). 16. The supply means causes the longitudinal sides (4, 104) of the article to have the supporting portions (21a, 21).
Device according to claim 15, characterized in that it is guided on a separating line (21) arranged between b). 17. The support base (1) according to any one of claims 7 to 16, further comprising a support base (1) adjacent to the support surface (21) and provided with side guides for positioning the article. Equipment. 18. Device according to claim 7, characterized in that a distributor (23) is provided for applying a strip of adhesive to the flat sheet material.