JPS6322633A - Device for stacking flat article - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Fresh chestnuts The present invention relates to a device for stacking flat articles.

More particularly, the present invention is a device for stacking flat articles comprising a positioning hole in the middle part and preferably consisting of a double bag, said double bag comprising a tubular or semi-tubular web of plastic film. a transfer arm arranged in a star shape and rotating about a horizontal axis; are placed in the stacking station on an endless stacking conveyor with intermittently driven tensioning means wrapped around reversing pulleys by means of a transfer device, preferably consisting of so-called three-post gates, having pairs of The apparatus is disposed at a stacking station and is movable up and down, with a holding plate carrying upright stacking pins for piercing the articles to form a stack that is driven forward by intermittent forward motion of the tensioning means;
A stacking device comprising a subsequent cutting station, preferably including a heated knife, for cutting the stack along a centerline extending in the direction of travel, and means for holding the separated stack on a stacking conveyor.

German Utility Model Specification No. 8128146 discloses a device of this type in which double bags cut along a transverse line from a tubular film by hot wire welding are stacked in a stack supported by an endless chain. Respective rows of stacking pins are provided on either side of the longitudinal centerline of the stack for receiving the bags on the plate. The means for separating the stack of bags comprises a heated knife which during operation cuts the stack between the rows of stacking pins at the cutting station, the stacking plate forming an abutment for the cutting knife. Since the stack also constitutes a rest for the heated knife, the stack must be relatively large and heavy. For this reason, this known device is a relatively expensive construction. This is because the endless chain must be provided with a stack of plates, which must constitute a rest for the cutting knife and occupy the same space as the stack carried by the chain. Because you have to hold on.

The object of the invention is a device of the type initially mentioned above, comprising:
so that the device can be configured more easily and economically,
The object of the present invention is to provide a device that reduces the requirements that a stacking conveyor must meet.

In a device of the first-mentioned type, this object is achieved according to the invention, in which the stacking conveyor comprises two spaced apart parallel rotating belts or chains, the stacking pins connecting the paths of the healds or the like of the stacking conveyor at the stacking station. - and arranged on a track fixed to the frame and adapted to be raised and lowered below the plane of movement, the cutting knife being arranged between the paths of the endless conveyor and the plane of movement; This is achieved by a device for stacking flat articles, characterized in that it cooperates with an abutment table located adjacent to the.

The stacking conveyor of the device according to the invention can be constructed from a pair of lightweight conveyor belts.

This is because a pair of conveyor belts or the like only serves to transport and hold the stack, but does not support the backing elements that have the same space as the stack and are located at the cutting station.

In the device according to the invention, the support means provided at the stacking station consist solely of a holding plate that supports only two stacking pins or stacking needles. The holding plate with the stacking pins, being lowered, only serves to assist in the formation of each stack at the stacking station.

An abutment for the cutting knife is provided at the cutting station and is fixed to the frame. As a result, the belt or the like of the stacking conveyor need not extend between the cutting knife and the abutment table when the stack is cut.

The stacking pins are suitably heated so that they join successive stacks of double bags as the stack increases. If the conveyor belts etc. that make up the stacking conveyor are not wide enough so that the sagging sides of the separated stack of bags are not held properly on the stacking conveyor, the sagging stack Roller combs for lifting the parts up to the plane of movement can be provided on both sides of the conveyor belt or the like in the cutting station, said roller combs being preferably pivotable about an axis parallel to the direction of movement.

According to another preferred feature of the invention, the roller comb is pivotally connected to a transverse frame member arranged opposite the conveyor belt or the like, and the backing rake is pivotally connected to the inner frame member so that the It serves to lift the lateral parts into the plane of movement and has roller combs and staggered teeth. At the cutting station, the laterally projecting stack is first lifted up to the transfer plane so that the laterally arranged roller comb can be swung between the teeth of the support rake.

According to another advantageous feature of the invention, a laterally arranged backing heald for supporting the stacking sections projecting laterally from the pair of conveyor belts is provided as a series of roller combs in the plane of movement.

If a backing belt arranged in the above manner cannot reliably transport separated stacks without shifting, a pressure application belt may be provided above the backing belt, with the lower path of the pressure application belt and the backing heald The transversely projecting portion of the stack can be gripped between the upper channel of the stack and the upper channel of the stack. Preferably, a human comb delimited by a pressure application belt is arranged above the roller comb at the cutting station.

According to another preferred feature of the invention, the holding means comprises a pair of clamp belts, said clamp healds for clamping separate stacks between the lower path of said clamp belts and the upper path of the conveyor belt. Helpful. Said pair of clamping belts holds the clamped stack even when the stack is cut in the middle, so that the separated stack does not slip even though it has sagging sides. Adjacent to and following the stacking station is advantageously a pressure application belt for cooperation with an upper path such as a conveyor belt. A rear reversing pulley of the pressure application belt is suitably mounted on an oscillator adapted to be moved up and down, so that it can receive stacks from the stack conveyor at the transfer end.

The conveyors or the like making up the stacking conveyor are provided with cleats that engage each stack at its rear, said cleats effectively forming push cleats.

Exemplary embodiments of the invention will be described in more detail below with reference to the accompanying drawings.

The shaft 2 connected to the drive device (not shown) is connected to the three pillar gate (wi
cketer) attached to the side frame 1 of the frame,
It supports a pair of transfer arms 3 with suction or gripping means. A hot wire welding machine is provided in advance of the three-post gate frame, and this welding machine is for cutting the bags from the tubular or semi-tubular plastic film web along the transverse line by hot wire welding. . The rotating transfer arm 3 takes over from this hot wire/8 landing machine the complete double bags, each joined along the center line, and pierces said double bags into a stacking pin or stacking needle 4.5.

A horizontal shaft 6 is attached to the side frame of the three-post gate, i.e. to a laterally arranged support bracket. The shaft 6 supports two spaced apart reversing pulleys 7 , which are arranged symmetrically with respect to the lateral center plane of the pair of transfer arms 3 . Another horizontal shaft 8 is attached to the frame at the transfer end of the stacking device and supports a pair of end reversing pulleys 9 in a corresponding arrangement. Two spaced parallel conveyor belts 10.10' are wrapped around the reversing pulley 7.9. The pair of pulleys 7.9 are connected to an intermittently operated drive (not shown).

Three-pillar gate arm 3 with supporting plates or retaining plates 15 arranged in pairs
A stacking station S is located between the two. The support plate 15 supports stacking pins 4.5, which are fixed to the support plate 15 and spaced apart in the transverse central plane between the arms 3. The support plate 15 is fixed in its central part to a piston rod 16 of a fluid-operated piston-cylinder unit 17.

? A The cylinders of the idle piston-cylinder unit 17 are connected to the horizontal arm of an angle bracket 18 welded to the main carrier 19 of the device. Support plate 1
5 to move parallel to the piston rod 16, the support plate 15 is provided with a guide pin 20 extending through a guide bore in the horizontal arm of the bracket 18.

The stacking pin 4.5 is heated by a heating cartridge which is supplied with a heating current via the line 22.23.

Due to the operation of the fluid-operated piston-cylinder unit 17, the tip of the stacking needle 4.5 is moved onto the conveyor belt 10.10.
The support plate 15 can be lowered to a position below the plane of movement '.

As is clear from FIG. 2, a gap is formed by a parallel rotating endless conveyor belt 10.10', and a support plate 1 is provided with a stacking pin 4.5 and is movable up and down.
5 is arranged in the gap. Conveyor belt 1O1
10' is supported on beams 27, 28 of box-shaped cross section with smooth upper surfaces. Also, as can be seen in FIG. 2, the sides of the stack 29 hang laterally from above the conveyor belt 10110'.

At the cutting station T, two fluid-actuated piston-cylinder units 30, 31 are fixed on a carrier fixed to the frame.

The piston/cylinder unit 50.51 is a box-shaped cross-section beam 2
It is provided with a piston rond which is arranged above the gap formed between 7.2° and 8 and supports a heated cutting knife 32. The knife 32 is adapted to be moved up and down in a longitudinal central plane between the beams 27 and 28. An abutment 35 having the same length as each stack 29 is arranged between the beams 27 and 28 and fixed to the frame and has an upper surface aligned with the plane of movement.

In the upper region of the outer surface of the beam 27.28 a backing rake 38.39 is mounted on the cutting station for pivoting about a parallel axis 36.37 extending in the direction of movement. The backing rake can be pivoted to the plane of movement by the fluid operated piston and cylinder unit 40 to assume the position shown in FIG.
It can be swung into the plane of movement and engaged with the beams 27, 28 so as to assume the position shown in FIGS.

A roller comb 47 is attached to the outer frame member 44 located on the opposite side of the conveyor belt 10, lO'.

The roller comb 47 is pivotable about parallel axes 45,46 extending in the direction of movement.

The roller comb 47 is pivotable by a fluid operated piston and cylinder unit 48 to assume the position shown in FIG. 5 and can be swung into engagement with the transverse frame wall 44. Each roller comb is provided with a central carrier 50, to which is fixed an axle on which rollers 51 are coaxially mounted. The axle extends perpendicularly to the carrier. The rollers 51 are mounted at one end only, and the rollers and the teeth of the backing rakes 38, 39 are staggered so that they can interlock without touching each other.

In the direction of movement, a roller comb 47 and a backing rake 38,39
is followed by backing belt 55.56, and backing belt 5
5.56 is wrapped around the reverse end pulley.

The pressure application belt 57.58 is the horizontal backing belt 55.5.
6, forming an inlet which is arranged at the cutting station T between the reversing pulley and the guide roller.

Said pressure application belts 57,58 serve to clamp the stack conveyed to the cutting station.

At the cutting station 'r, the hanging sides of the stack are lifted in the manner shown in FIGS. 3-7. For this purpose, the piston-cylinder unit 40 is first actuated in order to pivot the backing rake 38, 39 onto the plane of movement so that the stack 29 assumes a straight configuration on the plane of movement.

As soon as the backing rake has been swung out, the laterally arranged roller comb 47 is swiveled in, thus subsequently swinging the backing rake 38, 39 into the position shown in FIG. It can be returned. When the double stack is cut into individual stacks, the individual stacks are held between a laterally arranged backing heald 55.56 and a pressure application belt 57.58, as shown in FIG. Ru.

The backing rake 38, 38 on the one hand and the roller comb 47 on the other hand can be swung in and out independently of each other and thus while the last stack cut in the middle is being removed from the cutting station. Subsequent stacks can then be moved to the cutting station. For this purpose, the row cutting comb is swung in between the teeth of the backing rake, and while the stack to be cut is held in place, the backing rake is subsequently swung back into the beam. 27. Engages with 28. There is a gap between the inner edge of the individual rollers of the roller comb and the downwardly swung backing rake, i.e. the beam, the width of this gap is greater than the height of the stack to be cut and therefore the roller comb The gap between the front end and the downwardly swung backing rake has a sufficiently large width so that the movement of the stack with hanging sides to the cutting station T is not impeded. When the previously cut stack 29 has been removed, the following stack 29 can be moved to the cutting station T, the roller comb 47 is swung out, and subsequently the backing rake is swung out. The hanging sides of the subsequent stack 29 are lifted up to the transfer plane, which transfer plane is
When the roller comb 47 is lifted, it approaches the roller comb. The roller comb is then swung in so that the individual stacks separated by the cutting slits can be removed.

It is clear that the roller comb and the backing rake can be swung alternately in and out, so that the stack 29, which is conveyed in close succession to the cutting station T,
It can be lifted into a straight configuration and then cut and removed.

As soon as the transfer arm 3 of the three-pillar gate has pierced the stack consisting of a predetermined number of double bags onto the stacking pin 4.5, the feeding of additional bags is briefly interrupted and the stacking pin 4.5 is The supported plate 15 is lowered so that the stack 29 remains free and hanging on the sides of the conveyor belt 1O110.
'It will be placed on top. The stacking pins 4.5 are heated so that the bags of each stack are joined adjacent to the stacking holes.

When the stacking pin is lowered, the conveyor belt 10.1
0' is stepped forward by a drive (not shown) so that the stacking station is emptied and the stacking pin can be returned to the needling position and the stacking operation can then be resumed.

In coordination with the intermittent advancement of conveyor heald 10.10',
The stack is cut in the middle and removed.

Next, a second embodiment of the stacking device will be described with reference to FIGS. 8 and 9. In this embodiment, the stacking station S and the cutting station T correspond to those described with reference to FIGS. 1-7.

The apparatus shown in Figures 8 and 9 is a conveyor belt 10.10.
It differs from that shown in FIGS. 1 to 7 in the means for holding the stack of bags on it.

A rotating endless clamp heald 60.61 for holding the stack 29 of bags is arranged above the conveyor belt 10.10'. The clamping belt 60.61 forms an inlet between two wooden rollers 62,63, which follows in close proximity to the stacking station S and serves to receive the stack 29, thus allowing the stack 29 to be transferred before it is delivered. is clamped on the conveyor heald 10, 10' until the Gripping belt or clamping belt 60.6
The lower path for one clamp is biased by a spring-loaded pressure application roller 63. Clamp Held 60.6
The first rear reversing pulley 64 is attached to an oscillator 65 that is moved up and down by a fluid-operated piston-cylinder unit 66.

Clamp held 60, 61 is conveyor belt 10.10
' is driven intermittently in synchronization with '. In the apparatus shown in FIGS. 8 and 9, the stack of bags is fixed at the cutting station, so that there is no need for separate gripping or lifting means even at the cutting station.

The exemplary embodiments shown in FIGS. 8 and 9 are illustrated in FIGS.
It is much simpler than what is shown in the figure.

This is because the stack is clamped against the conveying path of the conveyor heald 10.10' in order to hold the stack in line immediately after it is formed and when the stack is cut and intermittently delivered. A pair of clamp belts for 6
This is because only 0.61 is provided.

If the stacking pin preferably consists of a heated needle, into which the article is pierced, the locating hole provided in the central area of the flat article or double bag can be omitted. .

For this reason, a preferred feature is that the stacking pin preferably consists of a heated needle and that the non-punched article is pierced by the needle.

[Brief explanation of the drawing]

FIG. 1 is a side view of the stacking device. The second time is a cross-sectional view taken along line A-B in FIG. 3-6 are cross-sectional views taken along line C--D of FIG. 1 showing the roller comb and backing rake in various positions. FIG. 7 shows the stacking conveyor in a sectional view taken along line E--F in FIG. FIG. 8 is a side view showing a second embodiment of the stacking conveyor. The ninth section shows a stacking conveyor in a sectional view taken along the line G-H in FIG. S... Stacking station T... Cutting station 4.5... Stacking pin 15... Holding plate (support plate) 16... Piston rond 17... Fluid operated piston/cylinder unit 10
．． 10'... Stacking conveyor (conveyor belt) 32... Cutting knife 35... Contact sound Fig, 3 Fig, 4

Claims (11)

[Claims] (1) A device for stacking flat articles preferably consisting of double bags and having a positioning hole in the middle portion, the device comprising:
the double bag is cut from a tubular or semi-tubular web of plastic film by hot wire welding, and has an opening-forming edge disposed adjacent to the centerline of the double bag;
At the stacking station, by means of a transfer device, preferably consisting of a so-called three-post gate, with a pair of transfer arms arranged in a star-shaped configuration and rotating about a horizontal axis.
placed on an endless stacking conveyor with an intermittently driven tensioning means wrapped around a reversing pulley, said stacking device being arranged at a stacking station and driven forward by intermittent forward actuation of the tensioning means. a retaining plate carrying upright stacking pins for piercing the articles to form a stack, and a trailing knife movable up and down, preferably heated, for cutting the stack along a center line extending in the direction of travel; and means for holding the separated stacks on a stacking conveyor, wherein the stacking conveyor consists of two spaced parallel rotating belts or chains, the stacking pins are A cutting knife is disposed in the stacking station between the paths of the belts or the like of the stacking conveyor, and on a track fixed to the frame and adapted to be raised and lowered below the plane of movement, and a cutting knife is inserted into the endless conveyor. a device for stacking flat articles, characterized in that it cooperates with an abutment table arranged adjacent to the plane of movement between the paths of the objects. The device according to claim 1, characterized in that (2) the stacking pin is heated. (3) that roller combs for lifting the sagging portions of the stack up to the plane of movement are provided on both sides of the conveyor belt, etc. at the cutting station and are pivotable about an axis parallel to the direction of movement; An apparatus according to claim 1 or 2. (4) The roller comb is pivotally mounted to a transverse frame member disposed on the opposite side of the conveyor belt, etc., and a backing rake is pivotally mounted to the inner frame member to carry the hanging transverse portion of the stack up to the moving plane. A gap with a roller comb and staggered teeth and a width greater than or equal to the height of the stack is formed between the roller comb when swung to the stack support position and the backing rake when swung down. The device according to any one of claims (1) to (3), characterized in that it is provided between. (5) A laterally disposed backing belt for indicating a stack projecting laterally from a pair of conveyor belts is provided as a series of roller combs in the plane of movement. The device according to any one of paragraphs (1) to (4). (6) A pressure application belt is provided above the backing belt and grips the transversely projecting portion of the stack between the lower path of the pressure application belt and the upper path of the backing belt. Apparatus according to scope paragraph (5). (7) An inlet nip delimited by a pressure application belt is arranged above the roller comb at the cutting station. Apparatus according to paragraph 1. (8) characterized in that the holding means comprises a pair of clamp belts, said clamp belts serving to clamp separate stacks between a lower path of said clamp belts and an upper path of a conveyor belt; Claim No. 1
) or (2). 9. Apparatus according to claim 7, characterized in that a pressure application belt for cooperating with an upper path, such as a conveyor heald, approaches and follows the stacking station. (10) The device according to claim (8), characterized in that the rear reversing pulley of the pressure application belt is attached to an oscillator that is adapted to be moved up and down. (11) Claims (1) to (9) characterized in that the conveyor belt or the like is provided with cleats.
) A device according to any one of paragraphs.