A pusher device with a safety release

Abstract

The pusher device with a safety release (100) comprises a movement element (2), for moving, alternatingly along a guide element (11), a support element (10) of an abutment element (1) which is configured so as to abut a product, an article or a part of an article which is to be moved. The movement element (2) and the support element (10) of the abutment element (1) are reciprocally coupled by means of a releasable coupling system (4) and are reciprocally arranged in such a way that the movement element (2), when activated linearly from the first retracted position to the second advanced position, exerts a pulling action on the support element (10) in order to pull the support element (10). The releasable coupling system (4) is realised and configured in such a way as to maintain the support element (10) of the abutment element (1) coupled to the movement element (2) with a coupling force having a predetermined value and is configured in such a way as to enable a decoupling of the support element (10) from the movement element (2) when the abutment element (1), encounters a resistant force that is greater than the coupling force of predetermined value, thus achieving a safety release of the support element (10) from the movement element (2) and therefore a stop of the movement of the abutment element (1).

Description

[0001] A PUSHER DEVICE WITH A SAFETY RELEASE

[0002] DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION

[0003] The present invention relates to the technical sector concerning semi-automatic / automatic machines destined to movement of products which must be moved to be inserted into relative containers or be moved to be transferred from a first position into a second position, or to movement of articles, such as for example boxes or containers, or parts of articles, such as for example flaps or folds of boxes or containers that are to be rotated and / or folded.

[0004] DESCRIPTION OF THE PRIOR ART

[0005] For this purpose, the machines are usually provided with pusher devices which comprise an abutment element, for abutment against a product or an article, or a part of an article, which is borne by a support element in such a way as to be projecting from the support element.

[0006] The support element is mounted slidably on a linear guide and is connected to a respective movement system which is configured and activatable to translate the support element alternatingly along the linear guide.

[0007] In this way, the abutment element can be moved with respect to the linear guide in an alternating way to carry out a first linear outward run, from a retracted position to an advanced position, and a second linear return run, from the advanced position to the retracted position.

[0008] The pusher devices are usually arranged flanked to the station in which a product or article, or a part of an article, is to be subjected to a movement or translation action.

[0009] In this way, during the first linear outward run, from the retracted position towards the advanced position, the abutment element can abut a product or an article, and push it to move and translate it, for example in order to insert a product internally of a respective container, or to translate a container to be filled or already-filled, or also so as to abut a part of an article to carry out an action on the part of the article, such as for example a flap or fold of a container which is positioned along the movement direction of the abutment element and which is to be folded or rotated.

[0010] During the movement of the abutment element in the first linear outward run, from the retracted position towards the advanced position, the abutment element first encounters the product or article or the part of article which is to be subjected to a displacement, then to carry out thereon a pushing action until the abutment element reaches into the second advanced position.

[0011] The most delicate step is taken during the pushing step that the abutment element exerts on the product or article or part of article which is to undergo a displacement.

[0012] In fact, during this step, for various reasons, snagging, or even blocking, can take place of the products or articles or parts of articles, which hamper or prevent the further displacement.

[0013] In these cases, the pusher device can be subjected to the undesired stresses, which can lead to damage thereto, or the pushing action exerted by the abutment element can be such as to cause damage to the parts of the semi-automatic / automatic machines located in the area in which the movement of the product or the article or the part of article is to take place.

[0014] In this matter, safety steps must be included to prevent these dangerous drawbacks. A known pusher device with safety release is for example illustrated in an entirely schematic way in figures 1 A and 1 B.

[0015] The known pusher device (9) comprises an abutment element (91), for example a rod having an elongate shape, which is borne by a support element (90), which can have for example the shape of a carriage.

[0016] The support element (90) is mounted slidably on a linear guide (92), for example in the form of a rail, which is present on a fixed frame (T).

[0017] The pusher device (9) further comprises a first movement system (8) which is connected to the support element (90) and which is configured to activate and move the support element (90) alternatingly along the linear guide (92), between a first retracted position and a second advanced position.

[0018] The abutment element (91) is mounted on the support element (90) in such a way as to project from the support element (90), i.e. , considering the linear guide (92), which is projecting towards the second advanced position.

[0019] In this way, for each, and during each, linear stroke from the first retracted position to the second advanced position, the abutment element can abut a product or article or part of an article, then to exert on the product or article or part of an article, a pushing action for moving the product, the article or the part of article. In the known pusher device (9) of figure 1, for example, the movement system (8) is realised in such a way as to comprise a kinematism (80) that is activatable by rotation of an actuator element (81), such as for example a flat cam that is activatable in rotation by a relative drive shaft.

[0020] The kinematism (80) comprises a series of lever arms (82, 83, 84, 85, 86) hinged to one another in which a first lever arm (82) is connected by a sliding element (820) to a profiled annular channel (87) present in the flat cam and a further lever arm (86) is connected to the support element (90).

[0021] The rotation of the flat cam leads to the movement of the series of lever arms (82, 83, 84, 85, 86) of the kinematism (80) in such a way as to move and translate the support element (90), and consequently the abutment element (91), alternatingly along the linear guide (92) between the first retracted position and the second advanced position, so that the abutment element (91) can abut a product or article or part of an article, then to exert on the product or article or part of an article, a pushing action for moving the product, the article or the part of article.

[0022] A lever arm (84) of the kinematism (80) comprises a plunger element (88) having a piston inserted in a pneumatic cylinder (89).

[0023] The pneumatic cylinder (89) is supplied with compressed air at a predetermined pressure value representing the minimum value of a resistant force allowed, which the abutment element (91) can move against during the movement thereof towards the second advanced position due to a snagging of a product or article or part of article.

[0024] In a case where, during the movement of a product or an article or a part of article on the abutment element, owing to snagging, a resistant force greater than the pressure value set for the pneumatic cylinder (89) were to act, the piston of the plunger (88) would experience a displacement internally of the pneumatic cylinder (89) which determines the opening of the pneumatic cylinder (89).

[0025] The displacement of the piston of the plunger (88) can possibly also be detected by a sensor (not illustrated in figures 1A, 1B).

[0026] In this circumstance, i.e. when the pneumatic cylinder (89) opens, the activation of the kinematism (80) is halted, and therefore the activation of the support element (90) along the linear guide (92) is also interrupted, thus obtaining a safety release which prevents the onset of any damage to the pusher device itself or to the parts of the machines located in the area in which the movement of the product or the article or the part of article is to take place.

[0027] This type of safety release, however, presents some drawbacks.

[0028] Firstly, the presence of a pneumatic cylinder on a lever arm adds weight to the activation kinematism of the support element along the linear guide, and this has a negative influence on the maximum velocity values that can be reached for the alternating movement of the support element along the linear guide.

[0029] Further, it is not simple to carry out a calibration of the pressure value to be set internally of the pneumatic cylinder in relation to the possible causes of snagging that can occur in the various use circumstances of the pusher device and therefore, situations can occur in which the set pressure value is too high and the pusher device continues with its normal functioning notwithstanding the fact that the product or article to be displaced has found an obstacle, and the safety release is not triggered.

[0030] Lastly, in a case in which a safety release takes place following the opening of the pneumatic cylinder, it is necessary to proceed to a new supply of compressed air until the pressure value internally thereof is returned to the predetermined value, before being able to resume normal functioning of the pusher device, and this results in a waiting time that negatively impacts on the performance of the semi-automatic / automatic machine on which the pusher device is predisposed.

[0031] SUMMARY OF THE INVENTION

[0032] An aim of the present invention is therefore to provide a novel pusher device with a safety release which provides an alternative solution to the pusher devices of the prior art described in the foregoing and in which the above-described drawbacks have been obviated.

[0033] The cited aim is attained according to the contents of the claims.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Preferred, but not exclusive, embodiments of the pusher device with safety release of the present invention will be described in the following with reference to the appended tables of drawings, in which:

[0036] - figure 1A, mentioned in the foregoing, illustrates, in a frontal schematic view, the prior art pusher device with a safety release as described in the foregoing;

[0037] - figure 1 B is a perspective view of the pusher device of figure 1 A;

[0038] - figure 2 is a schematic frontal view of the pusher device with safety release of the present invention, in a first operating configuration in which the pusher device is suitable for abutting a product, and article, or a part of an article, to push and move the product, article or part of articles (which have not been illustrated as the are not relevant to the invention);

[0039] - figure 3 is a schematic perspective view of the pusher device of figure 2;

[0040] - figure 4 is a schematic perspective view from a different angle to the one of figure 3, of the pusher device of figure 2;

[0041] - figure 5 illustrates, in a frontal schematic view, the pusher device with a safety release of the present invention, in a second configuration in which the safety release has been activated;

[0042] - figure 6 schematically illustrates, in a perspective view, some significant components of the pusher device with a safety release of the present invention; - figure 7 illustrates, is a plan view from below of the components of figure 6;

[0043] - figure 8 illustrates, in a frontal view, of the components of figure 6;

[0044] -figure 9 is a view along section plane l-l of figure 8; - figure 10 illustrates, in a frontal schematic view, some significant components of the pusher device with safety release of the invention in a further possible embodiment;

[0045] - figure 11 is a perspective lateral schematic view of figure 10;

[0046] - figure 12 illustrates, in a frontal schematic view, some significant components of the pusher device with safety release of the invention in a further possible embodiment;

[0047] -figure 13 is a perspective lateral schematic view of figure 12.

[0048] DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] With reference to the accompanying tables of drawings, reference numeral (100) denotes the pusher device with a safety release of the present invention.

[0050] The pusher device with a safety release (100), comprises:

[0051] an abutment element (1) which is configured so as to abut a product, an article or a part of an article which is to be moved;

[0052] a support element (10) of the abutment element (1 );

[0053] wherein the abutment element (1) is mounted on the support element (10) in such a way as to project from the support element (10).

[0054] For example, in a preferred but not exclusive way, the abutment element can have an elongate shape, such as for example that of a rod.

[0055] This shape can be used in a case in which the pusher device is to carry out an insertion of products, such as for example blister packs, internally of respective boxes.

[0056] According to the type of products, or articles, or parts of articles, which are to be moved, the abutment element can also have different shapes.

[0057] The special characteristics of the pusher device with a safety release (100) of the present invention consist in the fact that:

[0058] the support element (10) is mounted idle on a guide element (11) which is configured to allow a linear movement, with the support element (10) being configured to be translatable along the guide element (11);

[0059] and in the fact that it comprises:

[0060] a movement element (2), for moving the support element (10);

[0061] an activating system (3), which is configured to activate the movement element (2) linearly from a first retracted position to a second advanced position, and vice versa.

[0062] More in detail, the movement element (2) and the support element (10) of the abutment element (1) are coupled to one another by means of a releasable coupling system (4) in such a way that the support element (10), when the movement element (2) is activated linearly from the first retracted position to the second advanced position, and vice versa from the second advanced position to the first retracted position, translates alternatingly along the guide element (11) with a linear movement and thus advances and retracts the abutment element (1). In greater detail, the movement element (2) and the support element (10) are reciprocally arranged in such a way that the movement element (2), when activated linearly by the activating system (3) from the first retracted position to the second advanced position, exerts a pulling action on the support element (10) in order to pull the support element (10) so that the support element (10) translates along the guide element (11) with a linear movement in such a way that the abutment element (1) can abut and push a product, an article or a part of an article, to move the product, the article or the part of an article (see for example figures 2, 3 and 4). In a further preferred aspect of the invention, the releasable coupling system (4) is realised and configured in such a way as to maintain the support element (10) of the abutment element (1) coupled to the movement element (2) with a coupling force having a predetermined value, and is configured in such a way as to enable a decoupling of the support element (10) from the movement element (2) (see for example figure 5) when the abutment element (1), during the activation of the movement element (2) from the first retracted position to the second advanced position, and then during the translation of the support element (10) along the guide element (11), encounters a resistant force that is greater than the coupling force of predetermined value, thus achieving a safety release of the support element (10) from the movement element (2) and therefore an immediate stop of the movement of the abutment element (1 ).

[0063] In detail, the coupling force of a predetermined value with which the releasable coupling system (4) maintains the support element (10) of the abutment element (1) coupled to the movement element (2) is set as a function of the possible snags which the abutment element (1) might undergo during the action of pushing a product, an article or a part of an article, and as a function also of the type of semi-automatic / automatic machine on which the pusher device with the safety release of the invention is mounted.

[0064] In other words, the coupling force of a predetermined value can be set and regulated as a function of the minimum values of resistant force to which the abutment element can be subjected during the movement thereof, in such a way that the safety release is guaranteed in all cases of possible snagging or situations in which the abutment element during the movement thereof meets further resistant forces with respect to those determined by the weight of the product, article or part of article to be moved, or by the force of friction triggered by the movement or translation of a surface of a product or article.

[0065] Owing to the characteristics as described in the foregoing, and in particular the use of a movement element (2) which is arranged with respect to the support element (10) of the abutment element (1) in such a way as to pull the support element (10) when the movement element (2) is activated and moved from the first retracted position to the second advanced position, and to the fact that the support element (10) is coupled to the movement element (2) by means of the releasable coupling system (4), which maintains the support element (10) coupled to the movement element (2) by a coupling force having a predetermined value, each time that, due to one circumstance or another, the abutment element (1), during the movement thereof to move and push a product, an article or a part of an article, encounters a resistant force that is greater than the coupling force of predetermined value, the support element (10) decouples from the movement element (2), immediately interrupting the movement of the abutment element (1), and thus obtaining a safety release.

[0066] Thus, the pusher device with a safety release (100) is able to guarantee, simply and effectively, a safety release.

[0067] Further and other particular characteristics of the pusher device with a safety release of the present invention are described in the following.

[0068] The releasable coupling system (4) preferably comprises a first coupling element (41) and a second coupling element (42), and is configured in such a way that the first coupling element (41) is arranged on the movement element (2) and the second coupling element (42) is arranged on the support element (10) of the abutment element (1) (such as for example in the preferred embodiments illustrated in the figures), or, alternatively and in an equivalent way, it can also be configured in such a way that the first coupling element (41) is arranged on the support element (10) of the abutment element (1) and the second coupling element (42) is arranged on the movement element (2).

[0069] The first coupling element (41) comprises a first coupling profile (410) and, in turn, the second coupling element (42) comprises a second coupling profile (420) having a complementary shape to the first coupling profile (410) of the first coupling element (41).

[0070] Further, the releasable coupling system (4) comprises an application device of a pushing force (40) which is configured to push and maintain the first coupling profile (410) of the first coupling element (41) coupled with the second coupling profile (420) of the second coupling element (42) with a coupling force of a predetermined value.

[0071] According to the preferred but not exclusive embodiment illustrated in the figures, (see for example figures 6, 7, 8 and 9), the first coupling element (41) comprises a first coupling profile (410) having a wedge shape, while the second coupling element (42) comprises a second coupling profile (420) having a wedge shape, with the application device of a pushing force (40) being arranged and configured to push, and keep pushed, the first coupling element (41) towards the second coupling element (42) so that the first coupling profile (410) having a wedge shape engages and couples with the second coupling profile (411) having a recessed shape with a coupling force of a predetermined value.

[0072] In the preferred embodiment illustrated in the figures, the application device of a pushing force (40) is made in such a way as to comprise a hollow cylindrical body (45) with the first coupling element (41) having a wedge-shaped coupling profile (410) being arranged and mounted internally of the hollow cylindrical body (45). The hollow cylindrical body (45) is connected to a source of compressed air (not illustrated) which is configured to maintain the hollow cylindrical body (45) provided with a predetermined pressure value to push the first coupling element (41) and maintain the wedge-shaped first coupling profile (410) coupled with the second coupling profile (420) having a recessed shape of the second coupling element (42) with the coupling force of a predetermined value.

[0073] The application device of a pushing force (40) can also be realised with different embodiments that are in any case equivalent, for example using elastic elements or springs, to push and maintain the first coupling element coupled to the second coupling element with the predetermined coupling force value.

[0074] In other possible embodiments, the first coupling profile (410) and the second coupling profile (420) can have different shapes, for example respectively a spherical shape and a cavity shape with walls profiled as a spherical cap.

[0075] A further advantage connected to the use of an application device of a pushing force (40) as previously described, and illustrated in the figures, consists in the fact that it is possible to actively carry out a decoupling of the support element (10) of the abutment element (1) from the movement element (2), also in various situations.

[0076] For example in a case in which, for one reason or another, there is a lack of supply of the products, articles or parts of articles to be moved, and it is therefore not necessary to carry out any action, it will be sufficient to remove the supply of compressed air to decouple the support element (10) of the abutment element (1) from the movement element (2), to avoid uselessly moving the abutment element (1). The activating system (3) of the movement element (2) preferably comprises a linear guide element (20) on which the movement element (2) is slidably mounted and an activating device (22) for activating the movement element (2) to translate along the linear guide element (20) alternatingly from the first retracted position to the second advanced position.

[0077] In the preferred but not exclusive embodiments illustrated in the figures, the activating device (22) can be made in such a way as to comprise a flat cam (35) which is activatable in rotation about a horizontal rotation axis (H) and comprising an annular channel (36), and a kinematism (6) connected by means of a sliding element (60) to the annular channel (36) of the flat cam (35) and to the movement element (2).

[0078] The kinematism (6) and the annular channel (36) are configured in such a way that, for each complete rotation of the flat cam (35) about the horizontal rotation axis (H), the movement element (2) is translated, by means of the kinematism (6), along the linear guide element (20) alternatively from the first retracted position to the second advanced position and then from the second advanced position to the first retracted position.

[0079] For example, the kinematism (6) can comprise: a first lever (61) which is hinged, at a first end thereof, to a frame (V) and connected to the sliding element (60), a second lever (62), which is hinged at a respective first end, to the frame (V), a third lever (63) which is hinged at a respective first end thereof to the first lever (61), and hinged, at a second end, to the second lever (62), a fourth lever (64), hinged at a first end, to the second lever (62), and hinged, at a second end, to the movement element (2).

[0080] In the preferred embodiment of figures 2, 3, 4, 5, the movement element (2) is arranged anteriorly to the support element (10) of the abutment element (1), considering the movement of the movement element (2) from the first retracted position to the second advanced position, and the linear guide element (20) of the movement element (2) coincides, or is arranged parallel, to the guide element (11) of the support element (10) of the abutment element (1 ).

[0081] In other possible embodiments, such as for example those illustrated in figures 10, 11, 12, 13, the movement element (2) can be arranged superiorly (or even inferiorly, not illustrated) to the support element (10) of the abutment element (1), with the linear guide element (20) of the movement element (2) being arranged superiorly (or inferiorly), and parallel, to the guide element (11) of the support element (10) of the abutment element (1 ).

[0082] For example, in figures 10 and 11, the guide element (11) of the support element (10) of the abutment element (1) and the linear guide element (20) of the movement element (2) are mounted on a same side of a support panel (Z), with the linear guide element (20) being arranged superiorly of the guide element (11 ). Instead, in figures 12 and 13, the linear guide element (20) of the movement element (2) is mounted on the upper edge of the support panel (Z) while the guide element (11) of the support element (1) is mounted on the lower edge of the support panel (Z).

[0083] The support element (10) of the abutment element (1) can be made in the form of a carriage or slide having a respective coupling groove (such as for example the one illustrated in the figures) conformed in such a way as to couple slidably with the guide element (11 ), which can have the shape of a sort of rail.

[0084] The coupling between the support element (10) and the guide element (11) can also be realised in other ways, for example by means of use of rollers. The movement element (2), in turn, can be made in the form of a carriage or slide having a respective coupling groove (such as for example the one illustrated in the figures) conformed in such a way as to couple slidably with the linear guide element (20), which can have the shape of a sort of rail.

[0085] The coupling between the movement element (2) and the linear guide element (20) can also be realised in other ways, for example by means of use of rollers.

Claims

CLAIMS1) A pusher device with a safety release (100), comprising:an abutment element (1), configured so as to abut a product, an article or a part of an article which is to be moved;a support element (10) of the abutment element (1 );wherein the abutment element (1) is mounted on the support element (10) in such a way as to project from the support element (10);characterised in that:the support element (10) is mounted idle on a guide element (11) configured to allow a linear movement, with the support element (10) being configured to be translatable along the guide element (11 );and in that it comprises:a movement element (2), for moving the support element (10);an activating system (3), which is configured to activate the movement element (2) linearly from a first retracted position to a second advanced position, and vice versa from the second advanced position to the first retracted position; wherein the movement element (2) and the support element (10) of the abutment element (1) are coupled to one another by means of a releasable coupling system (4) in such a way that the support element (10), when the movement element (2) is activated linearly from the first retracted position to the second advanced position, and vice versa from the second advanced position to the first retracted position, translates alternatingly along the guide element (11) and thus advances and retracts the abutment element (1);wherein the movement element (2) and the support element (10) are reciprocally arranged in such a way that the movement element (2), when activated linearly bythe activating system (3) from the first retracted position to the second advanced position, exerts a pulling action on the support element (10) in order to pull the support element (10) so that the support element (10) translates along the guide element (11) in such a way that the abutment element (1) can abut and push a product, an article or a part of an article, to move the product, the article or the part of an article,wherein the releasable coupling system (4) is realised and configured in such a way as to maintain the support element (10) of the abutment element (1) coupled to the movement element (2) with a coupling force having a predetermined value and is configured in such a way as to enable a decoupling of the support element (10) from the movement element (2) when the abutment element (1), during the activation of the movement element (2) from the first retracted position to the second advanced position, and then during the translation of the support element (10) along the guide element (11), encounters a resistant force that is greater than the coupling force of predetermined value thus achieving a safety release of the support element (10) from the movement element (2) and therefore a stop of the movement of the abutment element (1 ).2) The pusher device with a safety release (100) as claimed in claim 1, wherein the releasable coupling system (4) comprises a first coupling element (41) and a second coupling element (42);wherein the releasable coupling system (4) is configured in such a way that the first coupling element (41) is arranged on the first movement element (2) and the second coupling element (42) is arranged on the support element (10) of the abutment element (1), or in such a way that the first coupling element (41) is arranged on the support element (10) of the abutment element (1) and the secondcoupling element (42) is arranged on the movement element (2);wherein the first coupling element (41) comprises a first coupling profile (410); wherein the second coupling element (42) comprises a second coupling profile (420) having a complementary shape to the first coupling profile (410) of the first coupling element (41),wherein the releasable coupling system (4) comprises an application device of a pushing force (40) which is configured to push and maintain the first coupling profile (410) of the first coupling element (41) coupled with the second coupling profile (420) of the second coupling element (42) with a coupling force of a predetermined value.3) The pusher device with a safety release (100) as claimed in claim 2, wherein the first coupling element (41) comprises a first coupling profile (410) having a wedge shape, and wherein the second coupling element (42) comprises a second coupling profile (420) having a recessed shape, wherein the application device of a pushing force (40) is arranged and configured to push, and maintain pushed, the first coupling element (41) towards the second coupling element (42) in such a way that the first coupling profile (410) having a wedge shape engages and couples with the second coupling profile (411) having a recessed shape with a coupling force of a predetermined value.4) The pusher device with a safety release (100) as claimed in claim 3, wherein the application device of a pushing force (40) comprises a hollow cylindrical body (45) with the first coupling element (41) being arranged and mounted internally of the hollow cylindrical body (45), wherein the hollow cylindrical body (45) is connected to a source of compressed air which is configured to maintain the hollow cylindrical body (45) provided with a predetermined pressure value to pushthe first coupling element (41) and maintain the first coupling profile (410) having a wedge shape of the first coupling element (41) coupled with the second coupling profile (420) having a recessed shape of the second coupling element (42) with the coupling force of a predetermined value.5) The pusher device with a safety release (100) as claimed in any one of claims from 1 to 4, wherein the activating system (3) of the movement element (2) comprises a linear guide element (20) on which the movement element (2) is slidably mounted and an activating device (22) for activating the movement element (2) to translate along the linear guide element (20) alternatingly from the first retracted position to the second advanced position.6) The pusher device with a safety release (100) as claimed in claim 5, wherein the activating device (22) comprises a flat cam (35) activatable in rotation about a horizontal rotation axis (H) and comprising an annular channel (36), and a kinematism (6) connected by means of a sliding element (60) to the annular channel (36) of the flat cam (35) and to the movement element (2), wherein the kinematism (6) and the annular channel (36) are configured in such a way that, for each complete rotation of the flat cam (35) about the horizontal rotation axis (H), the movement element (2) is translated, by means of the kinematism (6), along the linear guide element (20) alternatively from the first retracted position to the second advanced position and then from the second advanced position to the first retracted position.7) The pusher device with a safety release (100) as claimed in claim 6, wherein the movement element (2) is arranged anteriorly to the support element (10) of the abutment element (1), considering the movement of the movement element (2) from the first retracted position to the second advanced position, and the linearguide element (20) of the movement element (2) coincides, or is arranged parallel, to the guide element (11 ) of the support element (10) of the abutment element (1 ).8) The pusher device with a safety release (100) as claimed in claim 6, wherein the movement element (2) is arranged superiorly or inferiorly with respect to the support element (10) of the abutment element (1), and wherein the linear guide element (20) of the movement element (2) is arranged superiorly or inferiorly, and parallel, to the guide element (11) of the support element (10) of the abutment element (1).

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