WO2018001402A1

WO2018001402A1 - Central door closing device with transfer carriages

Info

Publication number: WO2018001402A1
Application number: PCT/DE2017/000185
Authority: WO
Inventors: Martin Zimmer; Günther Zimmer
Original assignee: Martin Zimmer; Günther Zimmer
Priority date: 2016-06-29
Filing date: 2017-06-28
Publication date: 2018-01-04
Also published as: ES2886645T3; ES2886645T8; DE102016007885A1; PL3478917T3; EP3478917B1; EP3478917A1

Abstract

The invention relates to a central door closing device comprising a housing in which a drive element can be adjusted between a first stowed position secured in a force-fit and/or positive fit and an idle position, and between a second stowed position secured in a force-fit and/or positive fit, and said idle position. Said closing device comprises a damping device and an energy accumulator which is charged when the drive element is in the stowed position and discharged when the drive element is in the idle position. The drive element can be coupled to a transfer carriage linearly driven in the housing, depending on the lifting direction. The damping device is mounted in the transfer carriage and comprises two piston rods directed in opposite directions. The energy accumulator is also part of a energy accumulator group that can be mounted on the housing and on the transfer carriage depending on the lifting direction. The present invention enables a central door closing device to be developed which is economical and which is also easy to assemble.

Description

Center door closing device with transfer carriage

Description :

The invention relates to a center door closing device with a housing in which a driving element between a first positively and / or positively secured parking position and a rest position and between a second positively and / or positively secured parking position and this rest position is adjustable, with a damping device and with a loaded in position of the entrainment element in the parking position and discharged in position of the driving element in the rest position energy storage, wherein the driving element is stroke direction dependent coupled with a linearly movable in the housing transfer carriage.

From WO 2013/023 934 AI such a device is known. It has two side slides which can be locked individually with the transfer carriage, between which an energy

Bestätigungskopiel Memory and a damping device are arranged with two mutually parallel cylinder-piston units. The piston rods of the cylinder-piston units point in the same direction.

The present invention is based on the object, cost and easy to install center door

To develop a closing device.

This problem is solved with the features of the main claim. For this purpose, the damping device is mounted in the transfer carriage and has two piston rods pointing in opposite directions. In addition, the

Energy storage Part of an energy storage module that can be stored on the housing and on the transfer carriage depending on the direction of travel.

In this center door closing device, the coupling of the driving element with the transfer carriage of the

Direction of the opening or closing stroke determined. The damping device mounted in the transfer carriage has two

Piston rods. One of the piston rods is when retracting from the right and the other piston rod when retracting from the left, for. Can be loaded by attachment to or by connection to the housing. The energy storage module, for example, positively coupled with the transfer carriage. At the

Closing is the end lying in the traversing direction and when opening the front lying in the direction of travel end of, for example, designed as a tension spring energy store with the transfer carriage. The other one End of the energy storage is decoupled from the transfer carriage and slidably mounted in the housing.

Further details of the invention will become apparent from the dependent claims and the following description of schematically illustrated embodiments.

Figure 1: center door closing device with driving element in the Ru eposition;

Figure 2: Cross section of the center door closing device

FIG. 1;

Figure 3: center door closing device of Figure 1 at

removed housing cover;

Figure 4: longitudinal section of the center door closing device in the

Rest position;

Figure 5: longitudinal section of the center door closing device with

Carrier element in a first parking position;

Figure 6: center door closing device when removed

Housing cover with entrainment element in a second parking position;

FIG. 7: housing bottom;

FIG. 8: housing cover;

FIG. 9: entrainment element;

FIG. 10: transfer carriages;

Figure 11: a longitudinal section of a cylinder-piston unit;

FIG. 12: energy storage module;

Figure 13: mounting plate for the center door closing device; Figure 14: mounting plate with inserted components.

FIGS. 1 to 12 show a middle door closing device (10) and individual parts of this direction (10). Such devices (10) are used for example in sliding door cabinets with three or more sliding doors to guide a non-external sliding door in a closed end position. The middle sliding door, which can be revealed both to the right and to the left, can be closed from both sides by means of the center door closing device (10). When closing the sliding door coupled eg door side driver coupled in an adjacent to the closed end position of the sliding part lift of the sliding door with the example arranged on furniture furniture center door closing device (10). The center door closing device (10) is triggered and acts on the sliding door with a resultant of a deceleration force acting counter to the closing direction (11; 12) and an acceleration force acting in the closing direction (11; 12). The sliding door is controlled braked and remains jerk-free and in the closed position without a stop.

The center door closing device (10) has a largely closed housing (21). This one has its in the

1 upper side (22) a driving opening (23), from which a driving element (71) protrudes into the environment (1). From the rest position (13) shown in FIGS. 1-4, the carrier element (71) is in the longitudinal direction (15) both to the left into a first one

Parking position (14), cf. Figure 5, as well as to the right in a second parking position (16), cf. Figure 6, adjustable. In the housing (21) two through holes (24) are seconded. The center door closing device (10) can be fastened, for example, to a furniture carcass by means of screws which are inserted into these through bores (24). In the housing (21) the entrainment element (71) is mounted in a transmission slide (81). The transfer carriage (81) carries a damping device (111) which cooperates with an energy storage assembly (151).

The housing (21) consists in the embodiment of a housing bottom (31), see. FIG. 7 and a housing cover (51), cf. Figure 8. Both parts (31, 51) are e.g. cupped. The housing bottom (31) has a flat bottom plate (32) with a peripheral bottom edge (33). Of the

is truncated pyramid-shaped bottom edge (33)

spaced from the periphery of the bottom plate (32). The apex angle of the opposite outer surfaces of the bottom edge (33) is e.g. two degrees each.

The bottom plate (32) has in the exemplary embodiment a flat support side (34) and a means of the bottom edge (33) limited inside (35). On the inside (35) in the illustration of Figure 7 three guideways (36, 41, 43), a guide pin (45) and a contact strip (46) are arranged. A first guide track (36) is embossed adjacent to the driving opening (23) in the housing bottom (31). It is formed axially symmetrical to a center transverse plane arranged normal to the longitudinal direction (15) and has a constant height over its length. The first guide track (36) has a central travel section (37), to which parking sections (38, 39) adjoin on both sides. The length of the operation section (37) is e.g. 50% of the length of the center door closing device (10). In the exemplary embodiment, the two parking sections (38, 39) each include an angle of, for example, the travel section (37). 95 degrees, with the imaginary vertex of the angle to the driving opening (23) shows. in the

Below, the parking section (38) illustrated on the left in FIGS. 3 to 6 is referred to as the first parking section (38). The park section (39) on the right-hand side in these FIGS. 3 to 6 is referred to below as the second parking section (39). The process section (37) and the parking sections (38, 39) may also be areas of a guide slot (64), eg a leading edge. The second guide track (41) and the third guide track (43) are arranged axially symmetrically with respect to each other with respect to the central transverse plane arranged normal to the longitudinal direction (15). The two guide tracks (41, 43) are straight guide tracks (41, 43) oriented in the longitudinal direction (15). In the exemplary embodiment, they are embossed in the region of the bottom plate (32) facing away from the entrainment opening (23). Their distance from one another is, for example, greater than the length of the first guide track (36). The length of the second guide track (41) and the length of the third guide track (43) are, for example, each 37% of the length of the first guide track (36). The mutually facing guideway ends (42, 44) of the second and the third guideway (41, 43) are elliptical in shape, for example. They can also be designed as edges oriented normal to the guideway direction, as prisms, etc. Other shapes of the guideway ends (42, 44) that are not circular in section are also conceivable.

In the region of the bottom plate (32) bounded by the three guide tracks (36; 41; 43), the guide pin (45) is arranged in the exemplary embodiment. The guide pin (45) has an oval cross-section with a longitudinal axis (15) oriented longitudinal axis. The length of this longitudinal axis is for example 10% of the length of the first guide track (36). The guide pin (45) protrudes, for example, by the same amount from the bottom plate (32). In a direction normal to this and normal to the longitudinal direction (15), the extension of the guide pin (45) is a quarter of said dimension. On the inner side (35) of the bottom plate (32) is further formed in the longitudinal direction (15) oriented contact strip (46), cf. Figures 2 and 3. It has over its length, this is for example 92% of the length of the Mitteltür- Zuziehvorrichtung (10), a constant cross-section. This contact strip (46) protrudes from the bottom plate (32) by 13% of the corresponding dimension of the guide pin (45). The contact strip (46) is arranged in the embodiment between the guide pin (45) and the two aligned short guide tracks (41; 43).

The housing bottom (31) also has two head receivers (47). These are arranged within the edge (33) on the end faces (48).

The housing cover (51) in the exemplary embodiment has the same outer dimensions as the housing bottom (31). The lid edge (52) is oriented on its outer side (53) normal to the cover plate (54) and flush with it. The inside of the lid edge (52) may be complementary to the outside of the bottom edge (33).

On the inside (55) of the housing cover (51) are three

Guideways (56, 61, 63) arranged. When the housing (21) is assembled, these guide tracks (56; 61; 63) are mirror images of the guide tracks (36; 41; 43) of the housing bottom (31). Optionally, the housing cover (51) with guide slots or without leading

Contours be formed. In the region of the housing cover (51) delimited by the three guide tracks (56, 61, 63), a pressure strip (57) oriented in the longitudinal direction (15) is integrally formed on the cover plate (54). This pressure strip (57) has two parallel to each other in the longitudinal direction (15)

Guided Receptors (58). These have one level normal to the longitudinal direction (15) has a circular section-shaped cross section. They are arranged in a direction normal to the cover plate (54) offset from one another. In the housing cover (51) further two openings (59) are arranged. Through these openings (59) through, for example, closure elements for joining the two housing parts (31, 51) can be inserted. These are, for example, screws, locking pins,

Cone press connections, etc. In Figure 9, the driving element (71) is shown.

This is axially symmetrical in the exemplary embodiment with respect to a normal to the longitudinal direction (15) oriented plane. A second plane of symmetry of the entrainment member (71) is oriented in the longitudinal direction (15) and penetrates the

Mitnähmezapfen (72) of the driving element (71). The driving element (71) is made for example of a thremoplastischen plastic.

The entrainment element (71) has a longitudinal (15)

oriented support area (73) and two on both sides

Guide pins (74, 75). These are formed in the embodiment as cylindrical guide pins (74, 75) with a constant cross-section. Their diameter is smaller in the exemplary embodiment by two tenths of a millimeter than the height of the first guide track (36). The center distance of the guide pins (74, 75) to each other is iz.B. 28% of the length of the first guideway (36). The width of the carrier element (71) in a direction normal to the plane of symmetry oriented in the longitudinal direction (15) is three times the width of the carrier region (73) in the region of the guide bolts (74, 75).

The support area (73) is in the exemplary embodiment by 85% longer than the center distance of the guide pins (74, 75). To the in Lengthwise (15) oriented ends he has a respective Mitnahmeza fen (72). The two driving pins (72) have mutually facing stop surfaces (76) and opposite outer insertion surfaces (77). The two, for example, parallel to the central transverse plane oriented stop surfaces (76) define an example trough-shaped

Driving recess (78). The support region (73) has two normal transverse to the direction of symmetry in the longitudinal direction (15) oriented transverse openings (79). These transverse openings (79) allow a loading surface (77) to be loaded

elastic deformation of the driving pins (72).

FIG. 10 shows the transfer carriage (81). In the exemplary embodiment, this component, which is produced, for example, from a thermoplastic, is 11% longer than the first guide track (36).

The transfer carriage (81) has a guide pin receptacle (82) and, for example, an abutment ledge receiving groove (83). Both are parallel to each other

oriented. The guide pin Aufnähme (82) is a slot-like breakthrough in the embodiment. Its length oriented in the installed state in the longitudinal direction (15) is for example 71% of the length of the transfer carriage (81). Its normal oriented height is e.g. by half a millimeter higher than the corresponding dimension of the guide pin (45).

The attachment strip receiving groove (83) in the exemplary embodiment is a longitudinal groove of constant cross section. She is at one

Side edge (84) of the transfer carriage (81) arranged. In the case of a transmission slide (81) installed in the housing (21), the contact strip (46) lies in the contact strip receiving groove (83), cf. FIG. 2. On the longitudinal side facing away from the system edge receiving groove (83), the transfer carriage (81) has a depression (85). In this recess (85), the thickness of the transfer carriage is 35% of its maximum width. Two driving apertures (86, 95) designed in mirror image to one another penetrate the transfer carriage (81). These catch openings (86, 95) are approximately L-shaped, wherein in the installed state the short leg (87) is oriented in the longitudinal direction (15) in the direction of the central transverse plane. The long leg (88) points in the direction of the driving opening (23) facing away. The included by the two legs (87, 88) angle is in the embodiment

100 degrees. It is therefore larger than the angle enclosed by the parking section (38, 39) and the travel section (37).

In this recess (85), the driving element (71) is receivable. The guide pins (74, 75) one side of the

Driving element (71) penetrate the driving openings (86, 95). Here, the driving element (71) sits largely free of play in the transfer carriage (81). For example, the surfaces defining the long limb (88) of the catchment openings (86, 95), at least approximately normal to the longitudinal direction (15), form entrainment surfaces (89).

In the region of the transfer carriage (81) facing away from the depression (85), two are parallel to one another

Cylinder seats (91, 96) arranged. These are cup-shaped and have at their longitudinal direction (15)

oriented ends of plant webs (92, 93, 97, 98). In the illustration of FIG. 10, on the left side the contact web (92) of the upper cylinder mount (91) has a

Rod recess (94). The left abutment web (97) of the lower cylinder receptacle (96) is in this embodiment concluded educated. On the right side of the cylinder receivers (91, 96) of the upper abutment web (93) is formed closed and the lower abutment web (98) has a

Bar recess (99). But it can also all investment webs (92, 93, 97, 98) have a rod recess (94, 99).

Both cylinder receivers (91, 96) have groove-shaped cylinder bearing surfaces (101, 102). These have, for example, in a plane normal to the longitudinal direction (15) a circular segment-shaped cross-section. The two cylinder bearing surfaces (101, 102) are arranged offset in the cross-sectional view of Figure 2 in the transverse direction to each other. In the illustration of FIG. 10, two are facing away from one another in the lower region of the transfer carriage (81)

Mounting lugs (103, 107) formed. The respective nose bridge (104, 108) in the embodiment with the longitudinal direction (15) forms an angle of e.g. 50 degrees. Between each nose bridge (104, 108) and the adjacent bearing web (92, 93, 97, 98) a Einhängeausnehmung (105, 109) is formed. The nose tips of the attachment lugs (103, 107) are rounded. The damping device (111) in the exemplary embodiment has two e.g. identical cylinder-piston units (112, 142). The single cylinder-piston unit (112; 142) has a cylinder (113; 143) and a piston rod (114; 144) adjustable relative thereto. In the assembled state, cf. the

Figures 2-6, the cylinders (113, 143) are seated in the cylinder receivers (91, 96) and the piston rods (114, 144) are located in the rod recesses (94, 99) of the transfer carriage (81). The two piston rods (114, 144) face in opposite directions. In the embodiment, the Piston rod heads (115, 135) of the piston rods (114, 144) held in the head receptacles (47) of the housing (21). However, the piston rods (114, 144) can also be designed so that they can be applied to the housing (21).

Figure 11 shows a longitudinal section of a cylinder-piston unit (112, 142). In the exemplary embodiment, this is a hydraulic cylinder-piston unit (112, 142). in the

Cylinder (113; 143) is a piston (115) by means of the piston rod (114; 144) movable between a first extended position and a second, retracted position. In the illustration of Figure 11, the piston (115) is in a middle position. This is the position which the piston occupies in the position of the driving element (71) in the rest position (13) shown in FIGS. 3 and 4.

The cylinder (113; 143) comprises a cylinder shell part (116), a cylinder bottom part (117) and a cylinder head part (118). The cylinder jacket part (116) has a largely cylindrical peripheral surface (119). The outer diameter is for example 5% of the length of the cylinder jacket part (116). The cylinder inner wall (121) is multi-stepped. It has one adjacent to the cylinder head part (118)

Spring receiving portion (122), a damping region (123) and an adjacent to the cylinder bottom part (117) freewheeling area (124). For example, when the cylinder-piston unit (112; 142) is mounted, the length of the spring receiving area (122) oriented in the longitudinal direction (15) is 24% and the length of the other two areas (123, 124) is each 38% of the length of the cylinder (FIG. 113, 143). The length of the freewheeling area (124) is at least a quarter and a maximum of three quarters of the total stroke of the damping device (111). The total stroke of the damping device (111) corresponds to the stroke of the individual cylinder-piston unit (112; 142) and in the longitudinal direction (15) oriented stroke of the ^{¬ take} element (71). The inner diameter of the cylinder (113;

143) is in the embodiment in the spring receiving area (122) by 7% and in the freewheeling area (124) by 3% greater than in

Damping area (123). It is also conceivable to increase the cross section of the cylinder interior (125) in the freewheeling section (124) by means of one or more grooves oriented in the longitudinal direction (15) or spirally formed. Of the

For example, the diameter of the cylinder interior (125) in the damping region (123) is 3.3% of the length of the

Cylinder (113, 143). The individual regions (122-124) merge into one another in frustoconical transition sections.

The cylinder head part (118) is held in a form-fitting manner in the cylinder jacket part (116) and engages around the piston rod (114;

144). For example, the cylinder head part (118) seals against the piston rod (114; 144). The cylinder bottom part (117) sealingly closes the cylinder jacket part (116) on the bottom side. For example, it is fixed positively there.

In the cylinder interior (125), a compensating spring (126) is arranged in the spring receiving area (122). This is designed as a compression spring (126) and is supported on the cylinder head part (118). With its free end, the compensating spring (126) loads a compensating sealing element (127) sealingly seated on the piston rod (114; 144) and sealingly abutting the cylinder inner wall (121) in the spring receiving area (122).

The piston (115) has a piston body (132), a piston head (129) and a piston disc (131). The piston body (132) is mounted on the piston rod (114; 144). Its outer diameter is slightly smaller than the inner diameter Diameter of the cylinder interior (125) in the damping area (123). The piston body (132) has, for example, three longitudinal openings (133), which are arranged on a common pitch circle. Each of the longitudinal openings (133) covers a segment of, for example, 100 degrees.

The piston head (129) is mounted on a central pin (134) of the piston body (132). It is elastically deformable and, in the exemplary embodiment, points in the direction of the cylinder bottom part (117). At its side pointing in the direction of the piston body (132), the piston head (129) has e.g. three cushions (135).

On the central pin (134) sits between the piston body (132) and the piston head (129), the piston disc (131). This is an elastically deformable thin disc (131). The piston disk (131) is displaceable on the central journal (134) between a bearing closing the longitudinal channels (133) on the piston body (132) and an abutment against the support studs (135).

In the cylinder interior (125), the piston (115) delimits a displacement chamber (136) adjoining the cylinder bottom part (117) from a compensation chamber (137) adjoining the compensating seal element (127). When the piston rod (114, 144) is extended, the displacement chamber (136) has the maximum volume while the compensation chamber (137) has the minimum volume. When the piston rod (114, 144) has retracted, the displacement chamber (136) has its smallest volume, while the compensation chamber (137) has the maximum of its volume.

Optionally, the compensating sealing element (127) in

Direction of the cylinder head part (118) to be shifted and the compensating spring (126) to be compressed. In FIGS. 2-6, an energy storage module (151), which can be coupled thereto, is arranged below the transfer carriage (81). FIG. 12 shows such an energy storage module (151). This energy storage module (151) comprises an energy store (152) and two spring slides (161, 171).

In the exemplary embodiment, the energy store (152) is a tension spring (152) in the form of a helical spring. It has over its length between the spring heads (153) a constant diameter and a constant wire diameter. The length of the tension spring (152) can be varied repeatedly from a rest position length illustrated in FIGS. 3 and 4 to the park position length and back shown in FIGS. 5 and 6. The rest position length, in which the not fully relaxed tension spring (152) has a residual tensile force, for example, is 55% of the length of the Mitteltür- Zuziehvorrichtung (10). The energy store (152), which has been relaxed to this residual tensile force, is referred to below as a discharged energy store (152). In the park position length shown in Figures 5 and 6, the tension spring (152) is stretched to 72% of the length of the center door closing device (10). In this embodiment, the energy store (152) has a linear force-displacement characteristic. However, it is also conceivable to form the energy store (152) with a non-linear characteristic.

The illustrated tension spring (152) is mounted at its two ends in each case in a spring slider (161; 171). The spring slider (161, 171) has the shape of a pad with two opposing slide pins (162, 172). These guide pegs (162, 172) have an oval cross-section whose cross-sectional longitudinal axis is directed in a direction normal to the spring receiver (163). The length of the cross-sectional longitudinal In the exemplary embodiment, the axis is 95% of the height of the second and the third guide track (41; 43). The laterally open spring receptacle (163) is T-shaped for receiving a spring head (153) of the tension spring (152). On the side facing away from the spring receiver (163), the spring slider (161, 171) has a cantilevered engagement bolt (164). This is oriented in the direction of the spring receptacle (163).

FIGS. 13 and 14 show an example of the installation of the center door closing device (10). When assembling an assembly auxiliary device (180) is used in this embodiment. This comprises a mounting base plate (181) with two therein e.g. impressed or milled-in subsidence depressions (182, 183). In one of the

Pad insets (182) are two mounting pins (184) are used, the normal to the mounting base plate (181) protrude from this.

When assembling the housing bottom (31) in the Auflageein- reduction (182) with the mounting pins (184) is inserted, so that the mounting pins (184) penetrate the housing bottom (31). Now, the transfer carriage (81) can be inserted into the housing bottom (31), wherein the guide pin (45) is inserted into the guide pin receptacle (82) and the Anlageleiste (46) is placed in the abutment ledge receiving groove (83) , The transfer carriage (81) is now freely displaceable in the longitudinal direction (15) relative to the housing bottom (31).

The carrier element (71) is inserted into the transfer carriages (81) so that the guide pins (74, 75) penetrate the driving apertures (86, 95) and protrude into the first guide track (36). The driving recess (78) of the driving element (71) points into the environment (1). Furthermore, in the transfer carriage (81) the

Damping device (111) inserted so that in each case a piston rod (114, 144) in a rod recess (94, 99) is arranged. The piston rod heads (138, 148) are each fixed in the head receptacles (47) of the housing (21), for example.

For example, next, the preassembled energy storage assembly (151) with two identical spring slides (161, 171) and a tension spring (152) arranged therebetween in the housing bottom (31) is used. Here, the spring slide (161, 171) are pushed onto the mounting pins (184) until the sliding pin (162) of the left spring slide (161) in the second guide rail (41) sits and the sliding pin (172) of the right spring slide (171) in the third guideway (43) protrudes. The tension spring (152) is in this case e.g. preloaded by 10% of its maximum stroke. Subsequently, the housing cover (51), which was first inserted in the second support recess (183), placed on the preassembled unit and gsichert. For example, the housing cover (51) engages with its lid edge (52) the bottom edge (33), so that the housing (21) is non-positively closed. An additional positive or cohesive security with or without connecting elements is conceivable. After removing the center door closing device (10) from the auxiliary assembly device (180) this is ready for use, see. FIG. 1

The assembly can also be done in a different order. An assembly without the described assembly auxiliary device (180) is conceivable. Due in part to the small number of components, the center door closing device (10) is inexpensive and also easy to install.

When installing in a piece of furniture, for example, the middle-door closing device (10) is fixed to the body of the piece of furniture and a driver attached to a sliding door. It is also conceivable to arrange the driver on the body and the center door closing device on the door side. When the sliding door is first closed, for example, one of the driving pins (72) is elastically deformed so that the catch engages in the driving recess (78). When the sliding door is closed, the entrainment element (71) of the center door closing device (10) is in the rest position (13) shown in FIGS. 1, 3 and 4.

In the illustration of Figures 3 and 4 are both the

Carrier element (71) and the transfer carriage (81) with respect to the housing (21) in a middle position. In the damping device (111), the two piston rods (114, 144) are partially extended. The pistons (115) are in a middle position relative to the cylinders (113; The energy storage device (151) rests with their spring slides (161, 171) on the transfer carriage (81), so that the engagement latches (164) on both sides in the

Insertion recesses (105, 109) intervene. The sliding pins (162, 172) can rest against the inner end systems (42, 44) of the second guide rail (41) or the third guide rail (43). The two parts (162, 42, 172, 44) can touch one another flatly or in a contact line. However, in the rest position (13), the slide pegs (162; 172) can also be spaced from the guide track ends (42; 44).

When opening the sliding door to the left of the driver moves the driving element (71) in the opening direction (17) Left. For example, at least one guide pin (74, 75) of the entrainment element (71) engages the entrainment opening (86, 95) of the transfer carriage (81). It is also conceivable that the end face of the entrainment element (71) bears against the recess (85) of the transfer carriage (81). The Mitnähmeelement (71) thus coupled to form a monovalent sliding clutch (71, 81) non-positively with the transfer carriage (81). When moving from the rest position to the left, the piston rod (114) is retracted in the cylinder-piston unit (112) shown in FIG. 3 above. Here comes the

Piston (115) in the freewheeling area (124). The oil (139) flowing from the compensation chamber (137) into the displacement chamber (136) flows around the piston (115). The first cylinder-piston unit (112) thus causes only a slight resistance against displacement of the transfer carriage (81).

In the damping device (111), the lower piston rod (144) is extended. In the second cylinder-piston unit (142), the oil (139) flowing through the piston (115) from the compensation chamber (137) into the displacement chamber (136) pushes the piston disc (131) in the direction of the piston head (129). The resulting large

Passage cross section opposes the movement of the transfer carriage (81) only a small resistance.

In this movement, the transfer carriage (81) pulls the left spring slider (161) to the left. The sliding pins (162) of this spring slider (161) slide along the second

Guideway (41) to the left. The right-hand spring slider (171), with its slide pins (172), abuts against the guide track end (44) of the third guide track (43). The transfer carriage (81) releases from the form-fitting on Guiding end (44) held right spring slide (171). The distance between the two spring slides (161, 171) increases. The energy store (152) is loaded. When the sliding door is opened, only a small force is required to move the entraining element 71 into the parking position 14, 16.

Upon further opening of the sliding door in the opening direction (17) to the left, the entrainment element (71) is further displaced along the guideway (36) until in the

Opening direction (17) front guide pins (74) in the parking section (38) passes. The driving element (71) tilts, so that the sliding door continues to move pulls the driver from the driving recess (78). The sliding door can now be opened almost without resistance.

In Figure 5, the center door closing device (10) is connected to the entrainment element (71) in a first, e.g. left parking position (14) shown. The driving element (71) is positively and / or positively secured in the parking position (14). In this case, the first guide pin (74) resting against a contact surface (49) in the parking section (38) penetrates the driving-through opening (86; 95) of the transfer carriage (81) in the long leg (88). The second guide pin (75) resting on the guide slot (64) in the travel section (37) penetrates the second catch opening (95; 86) in the short leg (87). The transfer carriage (81) held by the carrier element (71) lies in its left end position.

In the damping device (111), the upper piston rod (114) is retracted and the lower piston rod (144) extended. In this case, in the second cylinder-piston unit (142), the displacement chamber (136) has its maximum volume. The compensation chamber (137) is minimized. The compensating spring (126) is relaxed.

In the first cylinder-piston unit (112), the displacement space (136) disposed between the piston (115) and the cylinder bottom portion (117) is minimized while the compensation space (137) has its maximum volume. The balance spring (126) may be compressed and the balance seal member (127) may be displaced toward the cylinder head portion (118).

The energy storage module (151) continues with its left spring slide (161) on the transfer carriage (81). The left spring slider (161) is displaced along the second guide track (41) into a left end position. The right spring slider (171) is kept unchanged at the guide track end (44) of the third guide track (43). The energy storage (152) is loaded, the tension spring (152) is stretched. When the sliding door is closed in the closing direction (11) from the left, the driver contacts the carrier element (71) in a partial stroke of the total stroke adjacent to the closed end position. The driving element (71) is swung out of the parking position (14; 16). In this case, the transfer carriage (81) is released and moved in the direction of the rest position. This movement is done by means of a

Resultants of the damping device (111) and the discharging energy storage (152) influenced. In the damping device (111) in the first cylinder-piston unit (112), the piston rod (114) with the

Piston (115) extended. Due to the large passage cross-section, this movement is almost resistant. In the second cylinder-piston unit (142), the piston rod (144) retracted with the piston (115). The displacement chamber (136) is compressed, the valve plate (131) against the

Piston (115) is pressed and the longitudinal channels (133) ver ^¬ closes. The oil (139) from the displacement chamber (136) is displaced by the narrow throttle gap in the Ausgleichsräum (137). The movement of the transfer carriage (81) is damped. In the damping device (111) is at

Close thereby of the two series-connected cylinder-piston units (112, 142) only a cylinder-piston unit (142, 112) damping effect.

The energy store (152) pulls the left spring slide (161) in the direction of the rest position. This acts on the transfer carriage (81), which the energy store (152) thus accelerates. The right spring slider (171) remains in its position. The transfer spout (81), forming a monoblocked sliding clutch (71, 81), moves the carrier element (71) and the carrier in the direction of the rest position (13), where they stop without striking. The center door closing device (10) is now again self-centering in its rest position (13) shown in FIGS. 3 and 4. The sliding door is closed.

When the sliding door is opened to the right in the opening direction (18), the center door closing device (10) is moved from the rest position (13) shown in FIGS. 3 and 4 into the second parking position (16; 14) shown in FIG. The sliding door pulls the entrainment element (71) from the rest position (13) to the right by means of the door-side driver until it is positively and / or positively secured in the second parking position (16; 14). Here, the carrier element (71) takes the transfer carriage (81) in the

Opening direction (18), wherein the piston rod (114) of the first cylinder-piston unit (112) in the freewheeling region (124) retracted and the piston rod (144) of the second cylinder-piston unit (142) is extended. At the same time, the housing-side, left, spring slide (161) on the inner

Guide track end (42) of the second guide track (41). The right spring slider (171) is taken by means of the transfer carriage (81) along the third housing guide (43) with ^¬ . The energy store (152) is loaded. After pivoting the driving element (71) in the parking position (16; 14), the center door can be opened further in the opening direction (18).

When closing the center door in the closing direction (12) from the right, the driving element (71) from the parking position (16, 14) is triggered. Here it takes the

Transfer carriage (81), whose movement is retarded by means of the retracting piston rod (114). At the same time, the energy store (152) is discharged, so that the entrainment element (71) in the rest position (13) and the door means are pulled into the closed end position.

Combinations of the individual embodiments are conceivable.

List of reference numbers:

1 Environment 10 Center door closing device

11 closing direction from the left

12 closing direction from the right

13 rest position

14 first parking position

15 longitudinal direction

16 second parking position

17 Opening direction to the left

18 Opening direction to the right 21 Housing

22 top

23 driving opening

24 through holes 31 caseback

32 base plate

33 edge, bottom edge

34 bearing side

35 inside

36 guideway, first guideway

37 procedural section

38 park section, first park section

39 parking section, second parking section 41 guideway, second guideway

42 track end

43 guideway, third guideway

44 track end

45 guide pins 46 Attachment bar

47 Co-operations

48 faces

49 contact surface

51 housing cover

52 lid edge

53 outside

54 cover plate

55 inside

56 guideway

57 Pressure bar

58 receptors

59 breakthroughs

61 guideway

63 guideway

64 guide frame

71 entrainment element, sliding coupling part

72 driving pin

73 support area

74 guide pins

75 guide pins

76 stop surfaces

77 insertion surfaces

78 driving recess

79 transverse breakthroughs

81 transfer carriage, sliding coupling part

82 Guide pin holder

83 abutment receiving groove

84 side flank 85 depression

86 driving breakthroughs

87 short leg

88 long thigh

89 Mitnähmeflächen

91 cylinder recording

92 landing stage

93 landing stage

94 bar recess

95 Passage

96 cylinder recording

97 landing stage

98 landing stage

99 bar recess

101 cylinder support surface

102 cylinder support surface

103 hanging nose

104 bridge of the nose

105 suspension recess

107 hanging nose

108 bridge of the nose

109 suspension recess

111 damping device

112 cylinder-piston unit

113 cylinders

114 piston rod

115 pistons

116 cylinder shell part

117 cylinder bottom part

118 Cylinder head part 119 peripheral surface

121 cylinder inner wall

122 spring receiving area

123 damping range

124 freewheel area

125 cylinder interior

126 Compensating spring, compression spring

127 compensating sealing element

129 piston head

131 piston disc, valve plate

132 piston body

133 longitudinal openings, longitudinal channels

134 central spigots

135 cushions

136 displacement space

137 equalization room

138 piston rod head

139 oil

142 cylinder-piston unit

143 cylinders

144 piston rod

148 piston rod end

151 energy storage module

152 energy storage, tension spring

153 spring heads

161 spring slider, first spring slider

162 guide pegs

163 spring receiver

164 engagement latches Spring slider, second spring slider Sliding peg Mounting aid

Mounting Plate

Edition depression

mounting pins

Claims

Claims:

1. center door closing device (10) with a housing (21) in which a driving element (71) between a first positively and / or positively secured parking position (14; 16) and a rest position (13) and between a second force and / or positively secured parking position (16; 14) and this rest position (13) is adjustable, with a damping device (111) and with a position of the driving element (71) in the parking position (14; 16) loaded and in position of the driving element (71) in the rest position (13) discharged energy storage (152), wherein the entrainment element (71) stroke direction-dependent with a in the housing (21) linearly movable transfer carriage (81) can be coupled, characterized

in that the damping device (111) is mounted in the transfer carriage (81) and has two piston rods (114, 144) facing in opposite directions, and

in that the energy store (152) is part of an energy storage module (151) storable on the housing (21) and on the transfer carriage (81) in a stroke-direction-dependent manner.

Second center door closing device (10) according to claim 1, characterized in that the damping device (111) has two in

Series connected cylinder-piston units (112, 142) each having a piston rod (114, 144).

3. center door closing device (10) according to claim 2, characterized in that each cylinder-piston unit (112; 142) has a cylinder bottom part (117) adjacent freewheeling area (124) whose length is at least a quarter and a maximum is three quarters of the total stroke of the damping device (111).

4. center door closing device (10) according to claim 1, characterized in that the transfer carriage (81) in the housing (21) is guided.

5. center door closing device (10) according to claim 1, characterized in that the housing (21) at least one

Guide slot (64) arranged with two axisymmetric to a normal to the longitudinal direction (15) oriented center transverse plane, by means of a Verahrabschnitts (37) connected parking sections (38, 39).

6. center door closing device (10) according to claim 1, characterized in that the energy store (152) in a displaceable spring holders (161, 171) held tension spring (152).

7. center door closing device (10) according to claim 6, characterized in that stroke direction dependent at least one spring holder (161; 171) along at least one housing-side guide track (41; 43) is displaceable.

8. center door closing device (10) according to claim 1, characterized in that the entrainment element (71) and the transfer carriage (81) form a monohedral sliding clutch (71, 81).

9. center door closing device (10) according to claim 8, characterized in that the sliding clutch (71, 81) in the parking position (14; 16) is closed.

10. center door closing device (10) according to claim 8, characterized in that the location of the sliding coupling (71, 81) between the driving element (71) and the transfer carriage (81) is at least stroke direction dependent.