EP1058650A1

EP1058650A1 - Housing, especially for a packaging machine

Info

Publication number: EP1058650A1
Application number: EP99964466A
Authority: EP
Inventors: Walter Dietrich; Eberhard Krieger; Ulrich Wieduwilt; Klaus Stoeckel
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1998-12-30
Filing date: 1999-12-28
Publication date: 2000-12-13
Anticipated expiration: 2019-12-28
Also published as: US6386658B1; EP1058650B1; CN1108958C; DE59909036D1; DE19860765A1; BR9908378A; KR20010085208A; WO2000040466A1; CN1291955A; JP2002534325A

Abstract

The invention relates to a housing (11; 11a), especially for a packaging machine (10; 10a), in whose lateral walls (20; 20a), guides (21, 22; 60, 61) are configured for at least one protection window (25; 62, 63). The at least one protection window (25; 62, 63) is mounted in the guides (21, 22; 60, 61) by means of rollers (54; 76, 77, 82). The inventive housing is characterized in that the protection window (25; 62, 63) can be displaced in the guides (21, 22; 60, 61) in such a manner that a free accessibility to an area (18; 18a) located inside the housing (11, 11a) is made possible, whereby an opening of the housing (11; 11a) does not increase the space requirements of the packing machine (10; 10a).

Description

Housing, in particular for a packaging machine

State of the art

The invention relates to a housing, in particular for a packaging machine. Commonly known housing for

Packaging machines with protective disks arranged on the front of the housing, the protective disks being designed as pivotable, preferably transparent doors or hoods. These doors or hoods allow quick access to the relevant areas within the packaging machine, for example for adjustment or changeover work. The disadvantage here is that the pivoting range of the doors or hoods must be kept free in front of the packaging machine, which increases the area requirement of the packaging machine. In order to keep the space requirement as small as possible, a large number of relatively small doors or hoods with a reduced pivoting range are therefore often used. However, a larger number of doors or hoods increases the effort of the packaging machine. Furthermore, housings with protective devices in the form of roller blinds are known, which consist of hinged strips. However, the transparency of such blinds required for the optical monitoring of the production process is difficult to achieve. Furthermore, due to the many swivel joints connecting the strips of the roller blind to one another, the effort is relatively high, and the sound insulation is often inadequate. Advantages of the invention

The housing according to the invention, in particular for a packaging machine, with the features of claim 1 has the advantage that no additional

Space is required when the housing is opened, and at the same time, when the housing is closed, good visibility of the area of the packaging machine to be protected and good sound insulation is made possible.

Further advantages and advantageous developments of the housing according to the invention, in particular for a packaging machine, result from the subclaims and the description.

drawing

Embodiments of the invention are shown in the drawing and are explained in more detail below. Show it:

Figure 1 is a simplified perspective view of a

Packaging machine, Figures 2 and 3 simplified cross sections through the

Packaging machine according to Figure 1 with different

Positions of the protective screens,

Figures 4 and 5 views in the direction IV-IV and V-V of the

Figure 3, Figures 6 and 7 simplified cross sections through a modified packaging machine with different

Positions of protective panes,

Figure 8 is a view in the plane VIII-VIII of Figure 6 and

Figure 9 shows a detail of Figure 6. Description of the embodiments

1 to 5 show a production device in the form of a first packaging machine 10. The

Packaging machine 10, for example a cartoning machine, has a housing 11. On the outside of the housing 11, an operating and control device 12 and a stacking magazine 13 for flat cardboard blanks are arranged. In the interior of the housing 11 there is an essentially vertically extending partition 15 and in the lower region an oblique bottom cover 16 which slit the packaging machine 10 lengthways. The partition 15 and the bottom cover 16 separate a production space 18 from a drive and inside the housing 11

Engine room 19 from. In the case of a cartoning machine, for example, conveyor or manipulation devices for folding boxes and insertion devices for inserting objects into the folding boxes are arranged within the production room 18. These devices are driven from the drive and machine room 19, for which purpose the partition 15 has corresponding openings, not shown, for example for drive shafts.

In order to protect the production area 18 from unauthorized or unintentional intervention and dirt on the one hand, and on the other hand to have access to the facilities arranged in the production area 18 for adjustment work or in the event of production disruptions, the packaging machine 10 is specially set up. For this purpose, the two plate-shaped side walls 20 of the otherwise essentially block-shaped packaging machine 10 on the front or front side of the packaging machine 10 or in the area of the production space 18 are rounded in the direction of the production space 18 Groove-shaped guides 21, 22 for a sickle or ring section-shaped guide and shaped strip 23 and a flexible, preferably made of plexiglass rectangular protective disk 25. Furthermore, in at least one of the side walls 20 of the housing 11 in the region of the

Production room 18 formed an opening 26 into which the above-mentioned, not shown conveying or manipulating devices protrude.

The guides 21, 22 facing each other in the two side walls 20 and aligned with one another are preferably milled into the side walls 20. The length of the guides 21, 22 is such that when the protective disk 25 is closed, it protrudes up to an upper, horizontally running housing wall section 27, so that the production area 18 is completely closed.

While one guide 21 is crescent-shaped, the other straight guide 22 branches below the base cover 16 from one guide 21 to one

Turn off 24. As can be seen from FIGS. 4 and 5, the guide 21, which is otherwise designed as a rectangular groove 28, has an extension 29, at least in the area of the production space 18, for guiding the guide and shaped strip 23 within the groove 28.

The guide and molded strip 23, which is arranged in the guide 21 and in the first exemplary embodiment consists of two parts 31, 32 by means of a connection 33 and has a total of approximately half the arc length of the guide 21, has a toothing 35 on its inner end face. The toothing 35 is in engagement with a gear 36 arranged below the base cover 16. The two gear wheels 36 in the two side walls 20 are rigidly connected to one another by means of a shaft 37, via which at a motor drive of the guide and molded strips 23, preferably a drive torque is initiated.

In the rear area of the guide 21, a plurality of guide disks 39 partially covering the guide 21 are also arranged. The guide disks 39 hold the guide and shaped strip 23 in this area within the guide 21, since their groove 28 has no extension 29 there. The omission of the extension 29 is realized in this area in order to easily insert the guide and

To enable molding 23 in the guide 21 when mounting the housing 11.

So that the guide and form bar 23 can be moved with as little friction as possible in the guide 21, rollers 42 are rotatably mounted on bearing journals 40 on the side of the guide and form bar 23 facing the groove base 41. The arrangement of the rollers 42, the diameter of which is smaller than the groove width, is such that they are alternately supported on the mutually opposite groove side walls 43, 44. The toothing 35 is located near one of the groove side walls 43, so that the toothing 35 is protected by the extension 29 from the ingress of dirt. On the other hand, a space 46 is formed between the side of the guide and molded strip 23 opposite the toothing 35 and the other groove side wall 44, into which the protective disk 25 protrudes, whereby it lies on the guide and molded strips 23 and is spaced apart from the groove side wall 44.

At the front edge 47 and the rear edge 48 of the

Protective pane 25 is attached to the protective pane 25 on the side facing away from the guide and molded strip 23. This is done by means of a mounting bracket 51, which is arranged on the opposite side of the end and handle bar 50 (Figure 5). The mounting bracket 51 and the end and handle bar 50 are connected to each other with a screw 52 which penetrates a corresponding hole in the protective disk 25. On a leg 53 protruding at right angles from the mounting bracket 51, two further rollers 54 arranged offset from one another are rotatably mounted. So that the protective disk 25 can protrude as far as possible into the guides 21, 22, the protective disk 25 has recesses 56 in the area of the fastening angle 51 or the rollers 54 and on the side opposite the toothing 35 in the area of the rollers 42.

In order to enable the rear edge 48 of the protective disk 25 and the mounting bracket 51 to be in the region of the guides 21 and in contact with the guide and molded strips 23 when the housing 11 is closed, each guide is on the side opposite the toothing 35 - and molding 23 each have a recess 57, in the area of which the leg 53 together with rollers 54 is located (FIG. 3).

A fastening bracket 51 with rollers 54 is also arranged on the front edge 47 of the protective pane 25. It is essential that the area of the front edge 47 of the protective disk 25, which approximately terminates with the front end 58 of the guide and molded strips 23, is connected to the two guide and molded strips 23 in a non-positive or positive manner, so that a movement of the protective disk 25 is accompanied by a corresponding movement of the guide and molded strips 23. A positive coupling of the

Protective disk 25 with the guide and molded strips 23 can be made in that part of the mounting bracket 51 engages in a corresponding recess in the guide and molded strips 23, while a positive connection through Attaching the leg 53 to the guide and form strips 23 can be done.

The opening and closing of the housing 11 is described below with reference to FIGS. 2 and 3: When the housing 11 is open (FIG. 2), the protective disk 25 is located essentially in the region of the linear guides 22, while the guide and molded strips 23 are located in the rear area of the arcuate guides 21 are located. The base cover 16 is designed such that it still covers the front edge 47 of the protective pane 25 when the housing 11 is open. If the housing 11 is now closed, this takes place in the case of manual actuation by pulling up the protective pane 25 on the front end and grip strip 50, which is connected to this

Purpose can also be equipped with an additional handle (not shown). Due to the coupling of the protective disk 25 with the two guide and shaped strips 23, the protective disk 25 is transferred from the linear guide 22 into the curved guide 21. At the same time, the two guide and molded strips 23 reach from the rear part of the housing 11 into the area of the production space 18.

It is essential that the protective disk 25, which is guided as a flat plate in the linear guide 22, is gradually bent according to the contour of the guide 21 when passing into the circular-shaped guide 21, by the protective disk 25 on the side of the guide opposite the toothing 35 - and moldings 23 nestles. Appropriate dimensioning of the intermediate space 46 of the guide 21, into which the protective disk 25 projects, ensures that the protective disk 25 does not touch the groove side wall 44. This creates sliding friction between the protective disk 25 and the guide 21 avoided, so that the housing 11 can be closed with little effort, since at the same time the two guide and molded strips 23 can also be moved easily due to their rollers 42. The guide 22, in conjunction with the arrangement of the mounting bracket 51 and the rollers 54, is dimensioned such that the protective disk 25 is guided at least almost without contact within the straight guide 22. In the completely closed state of the housing 11 (FIG. 3), the front end and grip strip 50 closes off with the upper housing wall 27, so that the production space 18 is completely closed. Furthermore, the teeth 35 of the two guide and molded strips 23 are still in engagement with the teeth of the gear wheels 36.

The housing 11 is opened by pushing back or swiveling down the protective disk 25. The two guide and molded strips 23 roll in the circular-shaped guides 21, while the rear edge 48 of the protective disk 25 with the fastening angle 51 and the rollers 54 in the region of the Junction 24 enters straight guide 22.

In addition, it is mentioned that the shaft 37 is not only used to introduce a torque via the gearwheels 36 into the guide and molded strips 23 during motor operation of the protective disk 25. Rather, the described manual movement of the protective disk 25 prevents the protective disk 25 from tilting in the guides 21, 22 even when force is applied to the end and grip strip 50 on one side, since the shaft 37 couples the two guide and molded strips 23 to one another.

The first exemplary embodiment of the invention described and shown in FIGS a one-piece protective disk 25 is used, which extends over the entire width of the housing 11. It is also possible to use several protective screens with different widths instead of one protective screen. In this case, the side walls of the housing are not formed in one piece, but at least partially consist of several parts which are arranged at different distances from one another. For example, one protective pane in the lower region of the packaging machine then runs over its entire width, while the other protective pane in the upper region only extends over part of the width. With such a design with two protective panes, it makes sense to be able to pivot the upper protective pane upwards, which (with the housing open) lies in the upper area so that access to the units located in the drive compartment is possible.

In the second exemplary embodiment of the invention shown in FIGS. 6 to 9, the principle of the guide and shaped strips 23, around which the protective pane 25 clings, is abandoned. The packaging machine 10a there has a housing 11a, in the side walls 20a of which guides 60, 61 for protective disks 62, 63 are formed, the two guides 60, 61 running parallel to one another in wide areas. The guide 60 assigned to the protective disk 62 has an arcuate first section 64 in the region of the production space 18a and a second straight section 66 arranged in the bottom region of the packaging machine 10a. The other guide 61 also has a first arcuate section 67 in the area of the production space 18a and a second, straight section 68 in the floor area of FIG

Packaging machine 10a. The upper part of the guide 61 arranged on the side of the guide 60 facing away from the production space 18a is opposite the guide 60 elongated so that its protective disk 63 can also cover the upper region of the production space 18a. The two rectilinear sections 66, 68 of the two guides 60, 61 are arranged in the bottom area of the packaging machine 10a within a storage space 69, the size of which is adapted to the size of the protective plates 62, 63.

The two essentially rectangular protective covers 62, 63 each consist of a transparent material, in particular of plexiglass. While the one protective pane 62 is designed as a flat, flexible plate which, as will be explained in more detail below, adapts to the shape of the section 64, the other protective pane 63 is already provided with a curvature adapted to the arcuate section 67.

The two protective panes 62, 63 interact with each other like a venetian blind, ie they can be pushed over one another to save space. In order to make it as easy as possible to manually open and close the production space 18a, each of the protective panes 62, 63 also has two-part protective and guide strips 71, 72 and 74, 75 in their horizontal edge areas, each in the area of the top and bottom of the Protective pane 62, 63 are arranged. When opening the closed production space 18a according to FIG. 1, it is therefore sufficient to move the one, shorter protective pane 63 in the direction of the storage space 69, the other, longer protective pane 62 being taken along as soon as the underside of the protective and guide bar 74 against the upper side of the Protection and guide bar 71 meets. Conversely, when the open production space 18a according to FIG. 2 is closed, the protective pane 63 takes the protective pane 62 with it as soon as the Underside of the protective and guide bar 75 meets the underside of the protective and guide bar 71.

The protective and guide strips 71, 72 and 74, 75 have, in addition to the above-mentioned driving function of the protective pane 62, 63 when opening and closing the production space 18a, in particular also the task of bringing the protective pane 62, 63 into active connection with the guides 60, 61 . In the case of the protective disk 63, the guide 61 is in each case as a groove in the side walls 20a on the

Production room 18a facing side. A roller 76, 77 engages in each of the grooves and is arranged on both sides of the protective and guide strips 74, 75. The protective and guide strips 74, 75 and the protective disk 63 each have a width which almost corresponds to the distance between the two side walls 20a. The result of this is that the protective screen 63 is essentially flush with the side walls 20a, so that the entry of dust or dirt is prevented when the production space 18a is closed. At the same time, a relatively good sound insulation of the production space 18a is achieved towards the outside. In the case of the protective disk 62, the guide 60 is geometrically more complex, for which reference is made below to FIGS. 8 and 9.

The guides 60 in the side walls 20a each have two guide sections 78, 79. One guide section 78 is designed as a rectangular groove track. The guide section 79, which is likewise designed as a groove track, adjoins the groove bottom 81 of the guide section 78. Thus, the guide 60 has a greater groove depth in the area of the guide section 79 than in the area of the guide section 78, the width of the guide section 79 being greater than the thickness of the protective pane 62, so that the protective pane 62 is arranged with play in the guide section 79. The Guide section 78 in each of the side walls 20a serves to guide two rollers 82 of the same diameter d, which are arranged on the side of the protective disk 62 facing the production area 18a on the undersides of the protective and guide strips 71, 72, the

The diameter d of the rollers 82 is in each case smaller than the width b of the guide section 78 (FIG. 9).

In the area of the protective and guide strips 71, 72, the protective pane 62 has edge regions 84 in which the width of the protective pane 62 roughly corresponds to the distance between the two side walls 20a to one another or the width of the protective and guide strips 71, 72. In contrast, the protective pane 62 in its inner region 85 has a width which extends into the guide section 79, as a result of which the production space 18a is highly insensitive to dirt and good sound insulation is achieved. The inner region 85 of the protective pane 62 is thus guided in the guide section 79, while the edge regions 84 are located outside the guide 60.

In order to reduce the friction of the protective disk 62 in the guide section 79 of the guide 60, so that the displacement forces when moving the protective disk 62 in the guide 60 are low, the protective disk 62 in the area of the section 64 of the guide 60 is caused by the introduction of bending moment Md im Area of the protective and guide strips 71, 72 braced in an arc. The bracing or the amount of the introduced bending moment Md is selected so that the curvature of the protective disk 62 resulting from the bracing corresponds as closely as possible to the curvature of the guide section 79, so that the protective disk 62 is arranged in the guide section 79 without contact. The introduction of the bending moment Md via the protective and guide strips 71, 72 into the protective disk 62 takes place via the rollers 82 in the guide 60 in conjunction with the dimensioning of the diameter d of the rollers 82 and the width b of the guide section 78. As a result, the composite is from the two rollers 82 and the protective disk 62 are arranged under bending tension in the guide section 78, the roller 82 facing the inner region

Guide section 78 one roller 82 abuts the inner groove wall 88, while the other roller 82 abuts the outer groove wall 89.

In addition, it is mentioned that in order to further minimize friction, it is expedient to increase the groove width b of the guide 60 in the region of the straight lower section 66 such that the protective disk 62 is arranged there as a flat plate (as shown in FIG. 7) without a bending moment in the guide section 79 is. In this case, when the housing 11a of the packaging machine 10a is closed, the protective and guide strip 75 of the protective disk 63 takes it

Protective disk 62 with the lower section 66 of the guide 60. When passing into the arcuate section 64, a bending moment Md is introduced into the protective disk 62 as a result of the above-described configuration, which leads to a bending of the protective disk 62 in accordance with the curvature of the

Section 64 leads. During the entire displacement of the protective disk 62 in the guide 60, there is no or only minimal contact of the protective disk 62 with the guide 60, so that the opening and closing of the housing 11a can take place with relatively little effort.

The housing 11a can also be opened and closed not only manually, but also by a motor. For this purpose, in the exemplary embodiment according to FIGS. 6 and 7, an endless chain drive 90 is indicated, which is connected to one of the protective disks 62, 63 is connected and runs in the region of the production space 18a in a guide groove, not shown. The chain drive 90 is deflected around a plurality of gear wheels 91, of which one of the gear wheels 91 is operatively connected to a drive.

In a modification of the second exemplary embodiment according to FIGS. 6 to 9, it is also possible to use a single or a plurality of flat protective disks corresponding to the protective disk 62, into which a corresponding bending moment for reducing the frictional forces is introduced in the manner described. Also a housing with one or more pre-bent protective screens corresponding to the protective screen

63, but without a flat protective pane 62, is conceivable.

Furthermore, in both exemplary embodiments it is possible to make individual areas of the protective panes 25, 62, 63 partially opaque, for example by gluing on a film, so that when the housing 11, 11a is closed, only the relevant areas within the packaging machine 10, 10a is possible.

Finally, it is pointed out that the use of the housing 11, 11a should not only be limited to packaging machines 10, 10a. Other manufacturing facilities or housings of a general nature also allow easy access to a closed area from the front of the housing without the need for additional space outside the housing to open the housing.

Claims

1. Housing (11), in particular for a packaging machine (10), with at least one, at least partially made of transparent material, on the front of the housing (11) can be arranged protective disc (25), the protective disc (25) by means of in the side walls (20) of the housing (11) designed guides (21, 22) is mounted and can be displaced in the guides (21, 22) to release an area (18) arranged within the housing (11), the guides (21, 22 ) are arched at least on the front of the housing (11) and the guides (21, 22) have a substantially rectilinear section (66, 68) for the protective screen (25), characterized in that the protective screen (25) as flat, flexible plate is formed so that in the area of the arcuate guide (21) an arcuate bending element (23) is slidably arranged, that the protective disc (25) in the area of its front edge (47) with the area the front edge (58) of the bending element (23) is connected and that a straight guide (22) branches off from the arcuate guide (21) for the protective disk (25), so that the protective disk (25) changes when passing over from the straight guide (22) nestles into the curved guide (21) on the bending element (23).

2. Housing (11a), in particular for a packaging machine (10a), with at least one protective disc (62, 63) which can be arranged at least partially from transparent material and can be arranged on the front of the housing (11a), the protective disc (62, 63) is mounted by means of guides (60, 61) formed in the side walls (20a) of the housing (11a) and for releasing an area (18a) arranged inside the housing (11a) in the guides (60, 61) is displaceable, the guides (60, 61) being arched at least on the front of the housing (11a) and the guides (60, 61) having a substantially rectilinear section (66, 68) for the protective pane (62, 63) characterized in that the protective screen (62) is designed as a flat, flexible plate, that on the front and rear edge of the protective screen (62) has a guide strip (71, 72) with two on each side of the protective screen (62) Rollers (82) is fixed and that the rollers (82) on a guide bar (71, 72) on each side of the protective pane (62) have a different distance (a1, a2) from the protective pane (62), so that the protective pane (62 ) upon transition into the arcuate region (64) of the guide (60), introduce a bending moment (Md) into the protective disk (62), which in the protective disk (62) has a curvature corresponding to the curvature of the arcuate region (64) of the guide (60 ) causes.

3. Housing according to claim 1 or 2, characterized in that in the housing (11; 11a) a substantially vertical, dividing the interior of the housing (11; 11a) into two areas (18, 19; 18a, 19a) (15) is arranged and that the substantially rectilinear section (66, 68) is arranged in the bottom region of the housing (11; 11a), so that both regions (18, 19; 18a, 19a) are accessible when the at least one Protective disc (25; 62, 63) is located in the straight section (66, 68) of the guides (21, 22; 60, 61).

4. Housing according to one of claims 1 to 3, characterized in that the guides (21, 22; 60, 61) are designed as groove tracks and that rollers (54; 76, 77, 82) roll in the groove tracks, which with the at least one protective pane (25; 62, 63) is connected in the region of its front and rear edges (47, 48).

5. Housing according to claim 4, characterized in that the groove tracks have a separate groove section (46; 79) for guiding the at least one protective disk (25; 62, 63).

6. Housing according to one of claims 1 to 5, characterized in that in the presence of a plurality of protective discs (62, 63) cooperate telescopically, each protective disc (62, 63) being assigned a separate guide (60, 61).

7. Housing according to claim 1, characterized in that the bending elements (23) on the side facing away from the protective disk (25) have a toothing (35), that the toothing (35) is in engagement with a gear wheel (36) and that the two gear wheels (36) in the two side walls (20) are coupled to one another by means of a shaft (37).

8. Housing according to one of claims 1 to 7, characterized in that in the presence of a plurality of protective discs (62, 63) cooperate telescopically, each protective disc (62, 63) being assigned a separate guide (60, 61).

9. Housing according to claim 6 or 8, characterized in that the bending elements (23) on the side facing away from the protective disk (25) have a toothing (35), that the toothing (35) is in engagement with a gear (36) and that the two gear wheels (36) are coupled to one another in the two side walls (20) by means of a shaft (37).