EP1196679B1 - Device for guiding machine elements - Google Patents

Abstract

The aim of the invention is to create a device for guiding machine elements (2) along a guideway (8), especially a rail, chain or cable, which is improved by the provision of a simple construction and a protection against overloading. To these ends, a detent connection having at least one detent element (12, 13) is provided on the machine elements (2). Said detent connection is arranged between the machine element (2) and a guide element (20) that engages inside the guideway (8), whereby the detent element(s) (12, 13) positively engage(s) inside recesses (10, 11) located on the machine element (2).

Description

The invention relates to a device for guiding machine elements along a guideway, in particular rail, chain or rope, wherein on the machine elements a disengageable under force latching connection is provided with at least one locking element which is arranged between the machine element and engaging in the guideway guide member, wherein the one or more locking elements engage positively in recesses on the machine element.

From DE 196 25 215 A1 a high-speed door for deep-freeze houses is known, which has a flexible door leaf for closing building openings in cold stores, the door leaf is guided laterally in guides. In such a gate, it may happen that vehicles pass through before the gate is fully opened. Greater damage to the gate and the vehicle can be avoided if the gate has yielding guide elements that release the gate in the event of a side impact. In DE 196 25 215 A1 it is proposed to provide laterally resilient guide elements for this purpose on the lower transverse bar, which give way when a force is exceeded. A disadvantage of resiliently yielding guide elements is the limited spring travel. For particularly strong deflections, irreversible damage to the gate occurs.

From US 5,632,317 A a roller door is known in which a flexible door leaf is guided displaceably in two laterally arranged vertical guides. A substantially cylindrical Guide element acts together with a substantially rectangular connecting element, which engages positively in a lateral slot of the substantially cylindrical guide element. The rectangular connecting element is under horizontally directed tension, which is generated by a mounted on the lower part of the flexible door leaf spring. This spring causes an alignment of the rectangular connecting element and the substantially cylindrical guide element to each other, so that the positive engagement is maintained. Upon application of a transverse force on the door leaf, which is generated for example by an impacting vehicle, the connecting element is displaced such that there is a rotation of the guide element. As a result of this rotation of the positive connection between the guide element and the connecting element is released, so that the connecting element slips out of the gap of the guide element. The construction described is relatively expensive and can only be produced at relatively high costs. An essential element of Aufrechferhaltung the mechanical connection between the guide element and connecting element is the horizontal bias, which is generated by the spring.

The object of the invention is to provide a device for guiding machine elements, which provides a reliable protection against overload with a simple structure and after an overload case in a simple manner can be reset to the initial state.

The object is achieved in that two locking elements at the ends of two legs of a U-shaped bracket or a V-shaped bracket the latching connection or on two jaws connected by a hinge are provided and a clamp, screw, rubber element, spring or spring joint is provided, which contracts the legs or jaws with a predetermined force or pushes apart.

The arrangement according to the invention is characterized in that it requires only a few components, is simple and requires only a small installation space. In the case of hard, fast impacts, as may occur, for example, in the case of a roller door due to the impact of a vehicle, the invention ensures safe separation of the components, while offering high resistance to continuous loading, for example as a result of wind pressure on the door leaf. After disengagement, the locking connection can be re-engaged with a few simple steps. The pressing force, which also determines the force required for disengagement, can be selected in a simple manner by selecting a corresponding spring or clamp or by tightening the screw more or less. In particular, in the embodiment with screw, this can be solved to restore the initial state, to allow easier engagement of the holder on the machine element. Thereafter, the screw is tightened again until the desired contact pressure is reached. The embodiment of the invention is particularly simple, since the two legs and the spring joint can be configured as a prefabricated unit that can be mounted with a few simple steps.

In addition, the invention allows a variety of embodiments, depending on what type of machine element and guide element is concerned.

In a particularly inexpensive to produce embodiment, the legs are designed as sheet metal parts and the locking elements as angled portions of the leg ends.

The invention can be further improved by the measure that a microswitch connected to a motor control is provided in a recess of the machine element or the guide element intended to receive the detent elements in order to stop a drive motor after disengagement. In motor-driven machine elements, it is in fact desirable that the drive is stopped immediately after the occurrence of Ausrastens.

In a modification, a plug connection connected to the motor control can also be provided between the machine element and the guide element, which is disconnected during disengagement and stops the drive motor by means of the motor control.

In order to prevent damage to the plug connection when disengaging, especially when socket and socket strip are tilted, it is proposed that a socket or socket strip of the connector is elastically suspended in a holder connected to the guide.

Particularly advantageous, an arrangement has been found in which the plug or connector strip of the connector is attached to the machine part.

Preferred embodiments of the invention are explained in more detail below with reference to the drawings, wherein further advantageous details of the description and the drawings can be found.

Figur 1:

eine ausrastbare Vorrichtung zur Führung von Maschinenelementen in einer ersten Ausführungsform;

Figur 2:

eine ausrastbare Vorrichtung zur Führung von Maschinenelementen in einer zweiten Ausführungsform;

Figur 3:

eine ausrastbare Vorrichtung zur Führung von Maschinenelementen in einer dritten Ausführungsform;

Figur 4:

eine ausrastbare Vorrichtung zur Führung von Maschinenelementen in einer vierten Ausführungsform;

Figur 5:

eine schematische Darstellung eines Rolltores mit einer ausrastbaren Vorrichtung zur Führung von Maschinenelementen;

Figur 6:

eine Darstellung wie Figur 5 eines Tores mit gelenkig verbundenen, starren Paneelen;

Figur 7:

eine geschnittene Teilansicht gemäß Linie B-B von Fig. 1;

Figur 8:

ein Detail C einer Abwandlung der in Fig. 1 gezeigten Ausführungsform.

The figures show in detail:

FIG. 1:

a disengageable device for guiding machine elements in a first embodiment;

FIG. 2:

a disengageable device for guiding machine elements in a second embodiment;

FIG. 3:

a disengageable device for guiding machine elements in a third embodiment;

FIG. 4:

a disengageable device for guiding machine elements in a fourth embodiment;

FIG. 5:

a schematic representation of a roll-up door with a disengageable device for guiding machine elements;

FIG. 6:

a representation as Figure 5 of a door with hinged, rigid panels;

FIG. 7:

a sectional view taken along line BB of Fig. 1;

FIG. 8:

a detail C of a modification of the embodiment shown in Fig. 1.

The roller shutter shown in Figure 5 has a flexible curtain 1, which can be wound or unrolled by means of a motor drive, not shown, with a mounted at the lower end of the curtain 1 guide rod 2 moves up or down and a passage opening 3 released or is closed. The guide rod 2 is guided horizontally displaceable in lateral guide rails 4, 5. At the lateral ends of the guide rod 2, guide elements 6, 7 are provided for this purpose, which engage in the guide track 8 of the guide rails 4, 5.

FIG. 6 shows another embodiment of an automatically-opening gate in which rigid panels 9 made of metal or lightweight panels etc. are guided in the guide tracks 8 of the guide rails 4, 5, in each case with lateral guide elements 6, 7 which project laterally beyond the panel mounting dimensions. The guide rod 2 and the panels 9 represent machine elements which are guided along the guideway 8 with the device according to the invention.

FIGS. 1 to 4 each represent different embodiments of the invention in a representation according to section A-A from FIG. 5.

FIG. 1 shows the guide rod 2, which represents the machine element to be guided here. The guide rod 2 has at one end two Recesses 10, 11, in the two locking elements 12, 13 engage positively. The locking elements 12, 13 are arranged at the ends of two legs 14, 15 of a U-shaped bracket 16. The two legs 14, 15 of the U-shaped bracket 16 are connected by a connecting web 17 with each other.

Between the connecting web 17 and the two legs 14, 15, as indicated in Figure 1, in each case a joint 18, 19 may be provided. Instead of the joint 18, 19 but also an elastic compound of rubber would be possible. If the material of the connecting web 17 and the legs 14, 15 is elastic enough, the three mentioned components can also be formed in one piece.

At the connector 17 of the holder 16, a guide member 20 is mounted, which engages with its free end 21 in the guide track 8 of said guide rail 4.

The locking elements 12, 13 of the U-shaped bracket 16 together with the recesses 10, 11 of the guide rod 2 a latching connection. The necessary for disengaging the latching side force acting on the guide rod 2 from the designated in Figure 1 with arrow 48 direction, depends on the force with which the two locking elements 12, 13 are pressed against the recesses 10, 11. The force required for this is generated essentially by a screw 47 which passes through the two legs 14, 15 and contracts. To produce less strong contact forces, the screw 47 can be provided as shown in Figure 4 with a suitable spring. Instead of the screw 47 but can of course be an elastic rubber element, which is connected to the two legs 14, 15, or a clamp be provided. The screw 47 can also be completely replaced by a spring or as shown in Fig. 8 by an eccentric 50.

In the space enclosed by the U-shaped bracket 16 a socket strip 22 is arranged, which is suspended by means of a symbolic springs 23 indicated by elastic connection in the holder 16. A plug-in socket strip 22 plug-in connector strip 24 is fixedly mounted on the guide rod 2. The elastic suspension of the socket strip 22 ensures in the case of disengaging the latching connection, that the contact pins 25 of the connector strip 24 are not bent. Once after disengaging the socket strip 22 is disconnected from the power strip 24 and the electrical contacts are interrupted, holds a motor controller, not shown, which is connected via a cable 26 with the socket strip 22, the drive motor, not shown immediately to any damage to the roller door to avoid.

The right in Figure 1 arranged end of the guide rod 2 also has recesses 10, 11, which are intended for engagement of a second, not shown U-shaped holder. In order to ensure a stop of the drive motor s even when disengaging the right latching connection, the one recess 11 is provided with a microswitch 27 which is connected via a cable 28 to the power strip 24. An actuating element 29 of the microswitch 27 protrudes into the recess 11 from behind. In the locked state of the latching connection, the actuating element 29 is pressed in the direction of the microswitch 27, thereby closing one When disengaging the latching connection, the actuator 29 enters the vacant space of the recess 11 and thereby interrupts the contact of the microswitch 27, which via the cable 28, the plug connection 22, 24 and the cable 26 on the not shown engine control acts and interrupts the motor drive immediately.

As can be seen in Figure 6, if necessary, for example, during breaks or at night, disengagement of the latching connection can be prevented by means of bars 30 which establish a rigid connection between a panel 9 and the side guide rails 4, 5.

In the second embodiment of the connection shown in Figure 2, a V-shaped bracket 31 is provided with two legs 32, 33, at the ends in turn, the locking elements 12, 13 are arranged. In accordance with the first embodiment, the locking elements 12, 13 engage in recesses 10, 11 of the guide rod 2 a. Instead of a round cross-section as shown in FIG. 1, the recesses 10, 11 and latching elements 12, 13 shown in FIG. 2 have a hexagonal cross-section. However, a hexagonal cross-section is also possible in the first embodiment and a circular cross-section in the second embodiment.

The two legs 32, 33 of the V-shaped bracket 31 are interconnected by a spring joint 34. The spring joint 34 presses the two legs 32, 33 together, so that the locking elements 12, 13 are pressed with a predetermined force in the recesses 10, 11 and engage there. Of course, in accordance with modified embodiment of the recesses latching also done by pressed apart legs 32, 33, wherein the force required for this could also be generated by a modified spring joint 34. The spring joint 34 engages in a modified guideway 35 of the guide rail 4, where it is slidably guided. Moreover, the second embodiment according to the first embodiment, so that reference is made in particular with respect to the arrangement of electrical safety devices such as power strip 24 or receptacle strip 22 and micro switch 27 to the above statements.

In the third embodiment shown in Figure 3, a connected to a guide member 20 U-shaped bracket 16 is also provided, wherein at the ends of the two legs 14, 15 modified locking elements 36, 37 are provided, which are formed in correspondingly formed modified recesses 38, 39 the guide rod 2 engage. The U-shaped holder 16 shown here can be produced in a simple manner from a sheet metal strip by bending. The modified locking elements 36, 37 thus consist only of the bent ends of the metal strip. This embodiment is particularly inexpensive to produce.

In the embodiment shown in Figure 4, the guide member 20 is connected to a T-shaped holder 40, wherein in turn latching elements 12, 13 are formed at the ends of the T-shaped holder 40. On the guide rod 2, a hinge 41 is attached, with the two jaws 42, 43 are interconnected. The two jaws 42, 43 are replaced by a Screw 47 compressed, wherein in operative connection between the one jaw 42 and the screw 47, a spring 44 is arranged, which may be configured as a helical spring or disc spring stack. The two jaws 42, 43 each have recesses 45, 46, in which the latching elements 12, 13 of the T-shaped holder 40 can be latched. In this case, the T-shaped holder 40 is firmly clamped by the compressed jaws 42, 43, so that disengagement is ensured at exceptional momentary loads.

reference numeral

1

curtain

2

guide rod

3

Drive-through opening

4

guide rail

5

guide rail

6

guide element

7

guide element

8th

guideway

9

paneling

10

recess

11

recess

12

locking element

13

locking element

14

leg

15

leg

16

U-shaped bracket

17

connecting web

18

joint

19

joint

20

guide element

21

The End

22

Socket assembly

23

feathers

24

power strip

25

pin

26

electric wire

27

microswitch

28

electric wire

29

actuator

30

bars

31

V-shaped bracket

32

leg

33

leg

34

spring joint

35

guideway

36

locking element

37

locking element

38

recess

39

recess

40

T-shaped bracket

41

joint

42

jaw

43

jaw

44

feather

45

recess

46

recess

47

screw

48

arrow

49

attack

50

eccentric

Claims (7)

1. A device for guiding machine elements (2, 9) along a guide path (8, 35), in particular a rail, chain or cable, wherein a locking connection with at least two locking elements (12, 13, 36, 37) which may be disengaged under the effect of force is provided on the machine elements (2, 9), and said locking connection being arranged between the machine element (2, 9) and a guide element (6, 7, 20) engaging into the guide path (8, 35), wherein the locking elements (12, 13, 36, 37) engage into recesses (10, 11, 38, 39, 45, 46) on the machine element (2, 9) with a positive fit, and wherein two locking elements (12, 13) are provided at the ends of two limbs (14, 15, 32, 33) of a U-shaped holder (16) or of a V-shaped holder (31) of the locking connection, or on two jaws (42, 43) connected by a joint (41), characterised in that a clamp, screw (47), rubber element, spring or spring joint (34) is provided, which pulls together or presses apart the limbs (14, 15, 32, 33) or jaws (42, 43) with a defined force.
2. A device according to claim 1, characterised in that the limbs (14, 15) are designed as sheet metal parts and the locking elements (36, 37) as angled parts of the limb ends.
3. A device according to claim 1 or 2, characterised in that a micro-switch (27) connected to a motor control is provided in a recess (11) of the machine element (2) or of the guide element, which is envisaged for receiving the locking elements (12, 13), in order to stop the drive motor after the disengagement.
4. A device according to claim 1 or 2, characterised in that a plug connection (22, 24) connected to the motor control is provided between the machine element (2) and the guide element (20), in order to stop a drive motor after the disengagement.
5. A device according to claim 4, characterised in that a plug socket or a plug socket or plug socket strip (22) of the plug connection is elastically suspended in a holder (16, 31) connected to the guide element (20).
6. A device according to claim 5, characterised in that a plug or plug strip (24) of the plug connection is attached to the machine part (2).
7. A device according to one of the preceding claims, characterised in that a bar (30) is provided, in order to prevent a disengagement of the locking connection when required.

Images