TW202344320A - Slide closure for a vessel containing molten metal - Google Patents

Abstract

A slide closure for a vessel containing molten metal has a slider housing (12), a slide unit guided longitudinally therein, with a slide rod (13), a holder (15) on the slider housing (12) as well as a linear actuator (20) which can be fastened in this holder (15) with a drive rod (20') which can be coupled to the slide rod (13). The linear actuator (20) can be slid into the holder (15) on the slider housing (12), preferably transverse to its direction of adjustment, and can be removed from same and can be locked in the holder (15). At least one locking means (25, 30) is fastened to each of the linear actuator (20) and the holder (15), which locking means are developed to interact such that the linear actuator (20) locks automatically after or during being pushed into the holder (15). A permanently secure fastening of the linear actuator in the holder thus results.

Description

Sliding closures for containers containing molten metal

Field of invention

The invention relates to a sliding closure for a container containing molten metal, wherein the sliding closure has a sliding housing, longitudinally guided therein, a sliding unit with a sliding rod, a sliding member in the sliding a holder on the housing and a linear actuator that can be fastened in the holder with a drive rod that can be coupled to the sliding rod, wherein the linear actuator can It slides into the holder on the slider housing, preferably transversely to its adjustment direction, and can be removed therefrom and can be locked in the holder.

Background of the invention

A known sliding closure for a container containing molten metal according to document EP 3 424 618 has a sliding housing, a sliding unit guided longitudinally therein, and a sliding rod located in the sliding housing. A holder on the body and a linear actuator which can be inserted into this holder, with a drive rod which can be connected to the sliding rod of the sliding unit by a coupling. The coupling was developed so that, when in the flange of the linear actuator, it moves the drive rod against the slide which is pushed into the lateral recess of the holder. The unit couples the driving rod against the sliding unit, wherein the coupler has a coupling portion located at one end of the sliding rod and a coupling portion located at the driving rod of the linear actuator. At the front end, the driving rod is coupled to abut against the sliding rod when sliding.

A locking device is provided which can be actuated by a linear actuator and interact with the holder, by means of which the linear actuator can be fixed in the holder after being slid into the holder or can be placed in the holder. Remove the holder before being unlocked again. The linear actuator has a hydraulic cylinder, a main piston into which the drive rod is driven and an additional piston which can be moved independently of this for actuating the locking device. The additional piston is configured with a locking head which can be guided on the drive rod and which can be reversed at the front side from the inside of the hydraulic cylinder when the additional piston is loaded in the locking direction. outwards and preferably inserted in a form and/or friction locking manner into a correspondingly shaped recess in the holder of the hydraulic cylinder when the additional piston of the locking device is loaded in the unlocking direction , which can be taken out of the recess. The lateral recess is formed in the holder and in the recess formed therein, wherein the linear actuator is removed from the holder transversely to the direction of movement of the drive rod. The coupler can be automatically decoupled. An automated coupling of the linear actuator in the holder is possible with this locking device, however, it is proposed by using a main piston in the linear actuator and an additional piston that moves independently of it A relatively expensive structural solution.

Summary of the invention

The object of the present invention is to improve this known sliding closure so that servicing of containers for casting can be carried out automatically and with structurally simple components, and in this way to increase the operational safety of the sliding closure during casting. sex.

According to the invention, this problem is solved by fastening to each of the linear actuator and the holder at least one locking member developed to interact such that the linear actuator is Automatically locks after or during pushing in the holder, preferably at the end of the pushing process.

Due to this connection, according to the invention, in each case at least one locking member is connected to the linear actuator and the holder, by means of which the linear actuator is either pushed into the holder or During this time, preferably at the end of the pushing process, it is automatically locked, causing the linear actuator to be permanently fastened in the holder. The automatic locking prevents the linear actuator from moving against the pushing direction and, by design, also prevents the linear actuator from moving (further) in the pushing direction, whereby the automatic locking can end the process. push process.

Advantageously, the linear actuator can be unlocked in the holder, wherein, for unlocking, an adjustment member actuable manually or by an actuator is provided in a locking member. This makes it possible to use a simple component to be able to release the linear actuator, which however ensures a secure lock without interference. In this way, it is ensured that the locking is maintained even if there are operational vibrations or the slide is impacted, and that the linear actuator is permanently prevented from becoming loose from the retaining member.

Advantageously, the one locking member has a movable locking element with a front part, wherein, during locking, the front part engages in a recess of the other locking member so that the locking takes place, The locking element is adjustably accommodated, preferably transversely to the pushing direction of the linear actuator. Such a development of the interacting locking components achieves a locking that cannot be released during operation.

Expediently, the locking member of the linear actuator comprises a guide housing in which the locking element is moveable, and a spring member by means of which the locking element is engageable with it. The front part moves into a position protruding above the guide housing. The locking member of the holder has a sliding shoe provided with the recess. When the linear actuator is pushed in and/or pushed out, the sliding shoe is in sliding contact with the front of the locking element. . Preferably, the sliding shoe is designed to have a slope-like sliding guide distributed approximately in the pushing direction of the linear actuator for sliding contact with the front portion and the recessed portion. A simple design of this locking member is therefore realized as a specific embodiment.

The recess in the sliding shoe is positioned in the pushing direction relative to the retaining member, so that when the linear actuator abuts a stop in the retaining member, the front portion snaps into the in the recess. In this case, the push-in process is terminated by the stopper, wherein the locking also occurs automatically at the end of the push-in process. In this end position, the sliding shoe and the front part in the recess are each in mutual contact with a contact surface, wherein these contact surfaces are distributed at least approximately perpendicularly to the pushing direction of the linear actuator, with the result that the The front part is locked in the sliding shoe. Since the linear actuator is against the stop, an advantageous additional catching effect is also produced.

The linear actuator comprising the drive rod and a projecting transverse flange on the front part, and the C-shaped guide groove for reception on the rear part of the holder, is known. By way of example, the guide housing of the locking member is laterally arranged at the lateral flange, and the sliding shoe is adjacent to the C-shaped guide groove on the rear part of the retaining member. The locking members are therefore placed in an area that is almost protective of them. In principle, and vice versa, the guide housing can be arranged adjacent to the guide groove and the sliding shoe laterally to the transverse flange.

Expediently, the actuatable adjustment member is fastened transversely to the locking element of the locking member at the linear actuator and is preferably pushed away from the guide housing through a longitudinal opening. the linear actuator. By pushing upward, the locking element and its front part can disengage the recess in the sliding shoe and release the linear actuator.

Furthermore, the linear actuator and the holding element are respectively, in pairs, with at least one electrical plug element for an electrical connection line and/or at least one connection line for a gaseous medium, preferably air. associated with at least one plug element.

The invention is also characterized in that the plug elements are positioned so that they are inserted automatically after or during pushing in, preferably at the end of the pushing process of the linear actuator into the holder, And the locking member is automatically locked. This makes it possible to reduce the insertion of the linear actuator to a single action, performed manually or via a robot, without the need for additional manual connection of plug elements.

Furthermore, when the linear actuator is taken out from the holder, only a locking member is used to actuate the adjustment member to unlock. The plug elements associated in pairs with the linear actuator and the holder are automatically released.

On the one hand, the coupling of the drive rod of the linear actuator can be adjusted by an axial adjustment after or during pushing in, preferably at the end of the process of pushing the linear actuator into the holder. The sliding rod can be automatically coupled to the sliding unit. On the other hand, it is possible for the coupling to automatically move laterally away from the sliding rod when the linear actuator is removed from the holder. The resulting additional advantages are covered by the automated maintenance of the sliding closure.

Figure 1 shows a retainer 15 and a linear actuator 20, shown separated therefrom and slidable laterally into it. A sliding closure 10 is proposed having a slide housing 12 and having a longitudinally guided access thereto. In one of the sliding units, as shown in the illustration, only one sliding rod 13 penetrates into the one side opening 16' of the holding member 15. Furthermore, an insertable stroke-limiting bolt 14, known per se, is provided which engages in a longitudinal slot 19 in the sliding rod 13 in order to serve as a stop for the stroke of the sliding rod.

The configuration and functional operation of this sliding closure 10 are known per se and will therefore not be demonstrated in more detail. In order to set up the vessel as a continuous casting line, a hopper for containing molten steel is preferably suitable. However, it can also be used at the outlet of other vessels, such as, for example, reformers, hoppers or even furnaces in the field of non-ferrous metals.

Especially when using the vessel as a hopper of a continuous casting line, once the hopper filled with molten metal is placed on a rotating tower on a casting platform of the continuous casting line, the line is usually first aligned The actuator 20 is pushed into the holder 15 and tightened. This operation can be done manually or preferably by a manipulator or robot arranged on the casting platform, temporarily automatically identifying the holder 15 of the sliding closure 10 by an identification system installed therein the exact position of the linear actuator 20 , preferably designed as a hydraulic piston/cylinder unit, from a storage position by means of a corresponding gripping device, guiding it to the sliding closure 10 and It is inserted laterally into the holder 15 .

After or during pushing in, preferably at the end of the pushing process of the linear actuator 20, its driving rod 20' is coupled to the sliding rod 13 of the sliding unit. Expediently, this operation is carried out automatically, by means of the pliers-like coupling 11 at the front and the drive rod 20' displacing against the coaxially arranged sliding rod 13 of the sliding unit and by means of the pivotable spring-loaded jaws 21 is placed on the mushroom-shaped coupling flange 13' at the end of the sliding rod 13 and surrounds it in a form and/or force-fitting manner. A sliding closure with such a coupling is disclosed in document EP 0 875 320 B1 and will therefore not be explained in further detail.

The holder 15 is composed of a housing 16 configured with an opening 16' on one side, a fastening flange 17 attached to the slide housing 12 at the front and designed to be located on the housing 16 A C-shaped guide groove 18 is at the rear for receiving a transverse flange 22 of the linear actuator 20 . The approximately rectangular transverse flange 22 and the C-shaped guide groove 18 have two parallel grooves, one groove is located above the other groove, and their dimensions are appropriately made so that the transverse flange 22 can Sliding along the pushing direction E, its guiding surface 22' enters the guide groove with almost no gap until a stop 18', wherein the driving rod 20' and the sliding rod 13 are coaxial with each other in the same adjustment direction. ground alignment.

According to the invention, in each case a locking member 30 is associated with the holder 15 and a locking member 25 is associated with the linear actuator 20 , which interact such that the linear actuator 20 is in After or during being pushed into the holder 15 , preferably at the end of the process of pushing the linear actuator 20 into the holder 15 , it automatically locks into the holder 15 .

Advantageously, an adjustment member 26 that can be actuated manually or by an actuator is provided in a locking member 25 for unlocking.

As can be seen in particular from Figure 3, the locking member 25 of the linear actuator 20 very advantageously has a guide housing 28 laterally fastened in the transverse flange 22, a locking element 27 being able to Therein moves, as illustrated in Figure 1, a spring member 29 by which the locking element 27 and its front portion 27' can be moved into position when the linear actuator 20 is decoupled. The guide housing 28 protrudes above the starting position.

A sliding shoe 31 is provided through the locking member 30 of the retaining member 15. When the linear actuator 20 is pushed in or pushed out, as shown in Figure 2, the shoe is connected to the lock. The front portion 27' of the locking element 27 is in sliding contact, wherein the locking element 27 is adjustably accommodated in the guide housing 28 perpendicular to the pushing direction E of the linear actuator 20. Due to this approximately gap-free guidance of the transverse flange 22 with its guide surface 22' in the guide groove 18 it is ensured that the front part 27' is correctly guided onto the sliding shoe 31. The sliding shoe 31 of the locking member 30 is fastened to the free end side 15' of the retaining member 15 adjacent to the C-shaped guide groove 18, so when the linear actuator 20 is pushed in And/or when pushed out, it interacts with the locking element 27 of the locking member 25 .

The sliding shoe 31 is designed to have a slope-shaped sliding guide 32 that is at least approximately distributed along the pushing direction E of the linear actuator 20 and has the locking element 27 for locking. The connection recess 33 of the front part 27' locks at this point. The recess 33 in the sliding shoe 31 is designed in a position in the retaining member such that when the transverse flange 22 at the stop 18' is reached, and the preceding portion 27' Snapping into the groove 33, the linear actuator 20 is locked at the end of the pushing process.

According to Figure 3, the sliding shoe 31 in the recessed portion 33 and the front portion 27' that can be stuck therein are in contact with each other respectively with the contact surfaces 27", 34, which are approximately perpendicular to the linear axis. The pushing direction E of the actuator 20 is distributed, so that the front part 27' is closed in the sliding shoe 31 in a locking manner by these contact surfaces 27'', 34. In this way, a permanent lock is ensured even in the event of operational vibration or shock to the sliding closure, and the linear actuator is permanently prevented from loosening from the retaining member.

The mentioned manually actuable adjustment member 26 is fastened transversely to the locking element 27 of the locking member 25 at the linear actuator 20 . It exits through a longitudinal opening 28' of the guide housing 28, preferably vertically away from the linear actuator 20, and is distributed parallel to the transverse flange 20 and is therefore easily accessible for actuation. After casting, once the bolt shape adjustment member 26 has been adjusted upwards and thus the locking element 27 has been moved out of the recess 33, the linear actuator 20 can be pulled out of the sliding closure 10 Holder 15. The adjustment member 26 can also be surrounded by a removable protective cover so that it cannot be inadvertently actuated when the closure is in the operating position.

Expediently, when manually removing the linear actuator, it is possible to grasp with one hand the transverse flange 22 of this arrangement with a handle 24 and with the other hand the handle placed parallel to it on the rear side of the hydraulic cylinder. handle lever 23 and in this way the linear actuator can be pulled out. It can then be easily unlocked and pulled out with a simple hand actuation.

It also has the advantage that after unlocking, by pushing the clamping jaw 21 laterally from the mushroom-shaped coupling flange 13', the coupling 11 is also slid from the front part of the drive rod 20'. The sliding rod 13 of the unit is decoupled.

Furthermore, a suspension element 24' is arranged at the top side of the linear actuator 20, where it can be retained when not in use. There is also a clamping rod 46 with a handle mechanism 47 arranged on the top side of the holding member 15, and the clamping rod ensures transportation safety. The hydraulic piston/cylinder unit as linear actuator 20 is provided laterally with connection supports 39 , 44 for supplying medium and for controlling this medium, and these connection supports are connected to lines not shown.

Furthermore, a plurality of plug elements 35, 37 are associated with the holder 15, and a corresponding plug element 35' is associated with the linear actuator 20, and connecting lines connected to these plug elements for current and/or Or a medium, for example gas or air, is conducted, in particular to the sliding closure 10 , from a respective external source of electricity, gas or compressed air. These connecting lines are used to supply current to at least one consumer unit such as, for example, for early detection of slag or as a measuring and evaluation device for inductive heating, while the at least one connecting line for the medium is used as gas sealing or cooling etc.

Therefore, an electrical male plug element 35 is arranged on the rear end side 15' of the holder 15, and a corresponding female plug element 35' is arranged on the top side of the cylinder of the linear actuator 20 edge. The two plug elements 35, 35' are positioned opposite each other so that they can be inserted into each other along the pushing direction E of the linear actuator. A connecting line 36' from the outside leads via a curved sleeve 36 to the plug element 35'. At least one connecting line, not shown in detail, leads from the plug element 35 via a connecting sleeve 40 along the holder 15 into the sliding closure and/or discharges into the hopper. A self-opening protective cover 38 is illustrated at the opening of the plug element 35 into which the female plug element 35' can be inserted. When the plug element is not in the inserted state, the cover is closed to prevent contaminant particles from entering.

In addition, according to Figure 1, the two plug elements 37 are arranged inside the stopper 18' of the guide groove 18 in the holder 15. When the transverse flange is pushed in, these elements can engage with the plug element, not Shown in more detail, pairs are inserted onto the front side 42 of the transverse flange 22 . On the one hand, connecting lines (not illustrated in greater detail) located at the linear actuator 20 are led from the plug elements 37 to external sources, while on the other hand, the connecting lines 41 , 43 are led into the sliding closure. 10 in. These plug elements 37 are preferably designed as valve inserts for allowing the passage of gaseous media, such as air.

The invention has a further important advantage, as can be seen in Figure 2, that when or during pushing of the linear actuator 20 into the holder 15, preferably at the end of the pushing process, these locking members 25 , 30 automatically lock and likewise these plug elements 35 , 35 ′, 37 are automatically inserted, thereby establishing the connection of the connecting elements 36 , 41 , 43 . Furthermore, after or during pushing in, preferably at the end of the pushing process, the drive rod 20' can be pushed forward against the coaxially arranged sliding rod 13 of the sliding unit, and the coupling 11 is likewise automatically ground coupling.

On the contrary, when the linear actuator 20 is pulled out, the plug elements 35 , 35 ′, 37 are released from each other by this actuation of the adjustment member 26 , either manually or by an actuator after unlocking. , Furthermore, the coupling 11 is automatically released by the lateral movement of the sliding rod 13.

This automatic coupling of the linear actuator 20 in the holder 15 has become possible resulting in extremely easy operation, suitable for assembly and/or disassembly of the linear actuator 20 for robotic control, which can largely be eliminated Substandard operation due to incorrect insertion and/or incomplete locking.

The present invention is fully demonstrated through the above specific implementation examples. However, it can be illustrated by other variations.

In principle, the locking member can also be arranged in reverse, by the guide housing being arranged with the locking element movable therein, the adjustment member being fastened to the locking element and the spring member being arranged in the at the retaining member, and the sliding shoe will be arranged at the linear actuator so that the same locking and/or unlocking can occur in the same direction. For reasons of space, the guide housing can be fastened protrudingly from the bottom side of the exposed end side 15' towards the holder and the locking element can be moved in the locking position from bottom to top . For the sliding shoe at the linear actuator, the recess will point downward.

It goes without saying that the locking element can be designed differently than what is shown. The front part can thus show that a wedge-shaped piece with a corresponding self-locking contact surface can be received in a form-locking manner in the recess of the slide. The adjustment member can also, for example, be placed above the guide housing and alternatively be designed in a bolt-like, valve-like, hook-like or other shape.

Likewise, instead of a transverse flange at the linear actuator and a C-shaped guide groove in the holder, other guide members can be provided such as, for example, slotted nuts or guide rollers. Furthermore, the linear actuator is not pushed in in a direction transverse to the adjustment direction of its drive rod, but can, for example, in the adjustment direction or, alternatively, the holder is pushed in from the bottom and/or from The holder is removed. The locking members must therefore be positioned accordingly in order to perform the function of automatic locking and preferably manual unlocking.

E:Push direction 10:Sliding closure 11:Coupling head 12:Sliding part housing 13:Sliding lever 13’: Mushroom head coupling flange 14:Stroke limiting bolt 15: Holding parts 15’: Free end side 16: Shell 16’:Side opening 17: Fastening flange 18:C shape guide groove 18’: Stopper 19: Longitudinal slot 20: Linear actuator 20’: drive rod 21: Clamp 22:Transverse flange 22’: Guiding surface 23: handlebar 24’: Suspension elements 25,30:Latching component 26:Adjust components 27:Lock element 27’: Front part of the locking element 27’’,34: contact surface 28:Guide shell 28’: Longitudinal opening 29:Spring component 31: Sliding boot piece 32:Sliding guide 33:Connect the concave part 35,35’,37: plug element 36:Sleeve 36’:Connecting pipeline 38:Protective cover 39,44:Connecting components 40:Connecting sleeve 41,43:Connecting pipelines 42: front side 46:Clamp rod 47: handle mechanism

The invention, as well as further advantageous embodiments thereof, will be explained in more detail below using embodiments by way of example with reference to the additional figures. Which shows: Figure 1 is a perspective view of a holder of a sliding closure proposed according to the invention and a linear actuator slidable therein, respectively with exemplary locking members; Figure 2 is a perspective view of the locking member before it is locked when the linear actuator is pushed into the holder; and Figure 3 is a longitudinal section through the locking member when the linear actuator is pushed into the holder and in a locking state.

E:Push direction

10:Sliding closure

11:Coupling head

12:Sliding part housing

13:Sliding rod

13’: Mushroom head coupling flange

14:Stroke limiting bolt

15: Holding parts

15’: Free end side

16: Shell

16’:Side opening

17: Fastening flange

18:C shape guide groove

18’: Stopper

19: Longitudinal slot

20: Linear actuator

20’: drive rod

21: Clamp

22:Transverse flange

22’: Guiding surface

23: handlebar

24’: Suspension elements

25,30:Latching component

26:Adjust components

27’: Front part of the locking element

28:Guide shell

31: Sliding boot piece

32:Sliding guide

33:Connect the concave part

35,35’,37: plug element

36:Sleeve

36’:Connecting pipeline

38:Protective cover

39,44:Connecting components

40:Connecting sleeve

42: Front side

41,43:Connecting pipelines

46:Clamp rod

47: handle mechanism

Claims (14)

A sliding closure for a container containing molten metal, wherein the sliding closure has a sliding housing (12), a sliding unit guided longitudinally therein and with a sliding rod (13), a slider in the A holder (15) on the slide housing (12) and a linear actuator (20) that can be fastened in this holder (15) and with a device that can be coupled to the slide A drive rod (20') of the rod (13), wherein the linear actuator (20) can be slid into the holder (15) on the slide housing (12), preferably with The adjustment direction is transverse, and can be removed from it and locked in the holder (15), which is characterized by: At least one locking member (25, 30) is fastened to each of the linear actuator (20) and the retainer (15), the locking members being developed to interact so that the linear actuator The device (20) automatically locks after or during being pushed into the holder (15), preferably at the end of the pushing process. The sliding closure of claim 1 is characterized by: The linear actuator (20) locked in the holder (15) can be unlocked, wherein, for unlocking, an adjustment member (26) that can be actuated manually or by an actuator is provided on in the at least one locking member (25, 30). The sliding closure of claim 1 or 2 is characterized by: One of the locking members (25) has a movable locking element (27) with a front part (27'), wherein during locking the front part (27') engages with the other locking member (25). 30) in a recess (33), wherein the locking element is adjustably accommodated preferably transversely to the pushing direction (E) of the linear actuator (20). The sliding closure of claim 3 is characterized by: The locking member (25) of the linear actuator (20) has a guide housing (28) and a spring member (29) in which the locking element (27) is movable, wherein the lock The closing element (27) can move its front part (27') by the spring member (29) into a position protruding above the guide housing (28), and the locking member (15) of the retaining member (15) 30) Having a sliding shoe (31) provided with the recess (33), which is in contact with the locking element when the linear actuator (20) is pushed in or out. This front part (27') of (27) is in sliding contact. The sliding closure of claim 4 is characterized by: The sliding shoe (31) has a slope-shaped sliding guide (32), which is distributed at least approximately along the pushing direction of the linear actuator for sliding contact with the front portion (27'), and then The recess (33) is used to receive the front portion (27') of the locking element (27). The sliding closure of claim 4 or 5, characterized by: The recess (33) is positioned in the sliding shoe (31) along the pushing direction (E), so that at the end of the pushing process when the linear actuator (20) is against the holding member ( 15), the front part (27') snaps into the recessed part (33). The sliding closure according to one of claims 4 to 6, characterized in that: When locked, the sliding shoe (31) is in mutual contact with a contact surface (27'', 34) located in the recess (33) and the front part (27') respectively, wherein these contacts The surfaces (27'', 34) run at least approximately perpendicularly to the pushing direction (E) of the linear actuator, with the result that the front part is locked in the sliding shoe. The sliding closure according to one of claims 4 to 7, characterized in that: The linear actuator (20) has the drive rod (20') and a protruding transverse flange (22) on its front side, and the holder (15) has on its rear side for receiving the A transverse flange (22) and a C-shaped guide groove (18) of the linear actuator (20), wherein the guide housing (28) of the locking member (25) is laterally arranged on the at the transverse flange (22), and the sliding shoe (31) is arranged adjacent to the C-shaped guide groove (18) on the rear portion (15') of the retaining member (15) or vice versa, and The guide housing system is arranged adjacent to the guide channel and the sliding shoe laterally to the transverse flange. The sliding closure according to one of claims 1 to 8, characterized in that: The actuatable adjustment member (26) is fastened at the linear actuator (20) transversely to the locking element (27) of the locking member (25) and passes through a longitudinal opening (28 ') is pushed out of the guide housing (28) and preferably away from the linear actuator. The sliding closure of claim 9 is characterized by: In order to remove the transverse flange (22) of the linear actuator (20) from the guide groove (18) of the holder (15), it is possible to manually or by means of a manipulator in the guide housing ( The adjustment member (26) is actuated upwardly at 28) and thus the locking element (27) and the front part (27') can disengage from the recess (33) of the sliding shoe (31), and The linear actuator (20) can be pulled out. The sliding closure according to one of claims 1 to 10, characterized in that: The linear actuator (20) and the holder (15) are respectively associated in pairs with at least one electrical plug element (35, 35') and/or at least one plug element (37), the less one electrical plug Elements for electrical connection lines, at least one plug element for at least one connecting line (36, 41, 43) for a gaseous medium, preferably air, these plug elements being placed such that they are pushed in Afterwards or during pushing, preferably at the end of the pushing process of the linear actuator (12) into the holder (15), the locking members (25, 30) are automatically inserted and the locking members (25, 30) are automatically The ground is locked. The sliding closure of claim 11 is characterized by: The coupling (11) of the drive rod (20') of the linear actuator (12) can be inserted into the holder (11) after or during push-in, preferably when the linear actuator (12) enters the holder (11). The sliding rod (13) of the sliding unit can be automatically coupled to the sliding unit by an axial adjustment at the end of the pushing process of 15). The sliding closure of claim 11 or 12 is characterized by: When the linear actuator (12) is removed from the holder (15), the locking member (25, 30) can be adjusted by the actuatable adjustment member (25, 30) with a locking member (25, 30). 26) The plug elements (35, 35', 37) mutually unlocked and associated in pairs with the linear actuator (20) and the holder (15) can be automatically released. The sliding closure of claim 13 is characterized by: After unlocking the locking members (25, 30), when the linear actuator (12) is removed from the holder (15) by lateral movement, the coupling of the drive rod (20') The joint (11) can be automatically released from the sliding rod (13).