DE19901233A1 - Chain flat lock - Google Patents

Abstract

A chain flat lock 1 is provided for link chains used primarily in underground mining, the chain brackets 65, 66 of which are each provided with an anti-locking nose 67. An advantageous chain lock 1 is realized via this anti-locking nose 67 as well as the middle piece 18 bordered by the legs 6, 7, 8, 9 and the additional retaining tooth pairs 44, 45 provided here.

Description

The invention relates to a chain lock for link chains, in particular for link chains used in underground mining and tunneling, with two U-shaped ones Lock halves and a locking element designed as a central piece, which in the Closing joint between the alternately on the outer or inner legs with in closed state in interlocking holding teeth equipped lock halves and can be inserted between their inner legs and fixed there, the mutually facing sides of the inner legs interlocking tooth-like and that The center piece is equipped according to a patent (according to patent application 198 53 643.7).

Such a chain lock is from DE-GM 81 25 894, DE-PS 34 44 008 and DE-GM 93 14 756 known. In these known chain locks both lock halves after inserting the retaining teeth through the inserted bene locking element locked against each other so that they do not accidentally can slide or fall apart. Adequate protection against clan Kung should ge, for example, by a specially designed locking element be guaranteed that after insertion via springs or other locking parts is pressed apart that these surfaces adhere to the curves of the used or press together adjacent chain links. In particular in rough underground operation, however, it can be used with such spring-loaded Ver locking elements cause problems, especially when the resilient Parts are damaged in any way. According to DE-GM 93 14 756 Three pairs of retaining teeth are provided in order to safely transfer the necessary forces wear. In addition, there is a plastic deformation to the upper in the area of the transition surface consolidation is provided in order to better transmit the occurring forces or to be able to hold. With the solution according to the main patent, in addition to the stops pairs of teeth also created on the inside connecting elements in which the lock halves are also interdigitated in the area of the center piece, where integrating and enclosing the middle piece at the same time. Ultimately, too  this increases the safety of the staking, but through appropriate training the inside of the chain lock.

The invention is therefore based on the object from that of the Main application known chain lock with regard to the locking safety still in turn to create improved chain lock.

The object is achieved according to the invention in that the chain brackets with are each provided with an anti-locking nose.

The corresponding anti-locking lugs are designed so that the chain locked in the adjacent chain links can only move to a limited extent. Here too additional holding teeth are provided, for example by a Z-shaped trained center piece is supported. Without special training of the center piece can be increased in this way in a range where in the prior art, no safeguard against clanking is provided. The Corresponding anti-locking lugs can be used in the manufacture of the chain lock or the lock halves are provided, so that a significant additional Effort does not occur.

A high level of security is achieved when the Anti lashing nose resulting in a lashing-free swivel zone of around 40% is formed and preferably extends over 45 mm. This doesn't mean that the entire chain bow is provided with an anti-stripping zone, but only one relatively small area on both sides of the central axis. It is an effective antiver Clanking created in the main pulling direction, advantageously on a collar in the eyelets area of the chain lock can be dispensed with. Overall, such a ver reduction in clanking of 28% in the arch area of around 140 °.

Because of the locking safety that is ensured in this way it is advantageously possible, in the case of training with monodentate pairs of retaining teeth Reduce tooth thickness from 30 to 22 mm. The outer leg is then around 15  mm shorter, so that overall a very robust chain lock results.

A favorable middle part with regard to the forces is one in the cross cut parallelogram-like. In this form of the center piece, which like usual via a lock nut or similar is set, the corresponding additional Holding teeth absorb and transmit the necessary forces exactly in the longitudinal direction. In this solution, too, the anti-locking lugs are provided on both sides. A monodented pair of retaining teeth can thus be advantageously implemented.

In addition to the anti-clipping noses, you can use a suitable Training the inner legs with locking humps and the outer legs with Correspondingly trained locking grooves are equipped, the Mit telstück has a long support base or can be designed differently and is screwed with locknuts as is known. Here you can have both one and two as well as three-tooth training in pairs.

As already mentioned, the centerpiece can be the parallelogram like, the Z-shaped or just act such that a long support base and where with a central screw or shrink connection the Festle This takes place without the need for essential tools. The long ab The support base also has the advantage that it can be designed and extended in this way that the swivel range of the adjacent chain links can be adjusted accordingly can be restricted. The middle piece runs obliquely and accordingly parallel to the closing joint and also to the retaining teeth. It may be appropriate to Chain eyelet to adapt further to the shape of the adjacent chain link, what can be achieved that the eye-holding tooth of the inner thigh strengthened and is arcuate. With the help of the corresponding center piece with the long one Support base and, for example, the shrink connection can be completed and Assembly of the chain lock can be completed quickly and accurately.

With such a centerpiece with a long support base ver different variants of chain locks can be realized. The saw  tooth-shaped holding teeth and the center piece the same or a different Tilt up. For example, saw teeth and middle part and teeth under Be inclined at 16 ° or below 12 °, with the tooth root thickness of the tooth close to the eye 16 mm is 4 mm thicker. The teeth and middle section are inclined at 12 ° and a correspondingly thinned middle piece is used, one achieves an even one 24 mm thick inner thigh hub, which is for example around 4 mm thicker.

It is also conceivable to deviate from the inclination of the middle part, the Closing joint runs parallel, so that here too the center piece is facing each other facing sides of the inner and outer legs. Here are the centerpiece and the sawtooth-shaped holding teeth are designed to run horizontally in the pulling direction, it being particularly advantageous if the center piece has saw teeth on both sides is provided, which are designed to support and engage in the inner thighs. This special design of the center piece then also results in the clear one Additional teeth in the area of the center piece and thus the advantageously uniform Transfer of the occurring forces.

With regard to the formation of the holding teeth, assembly is easily possible if the holding teeth have no undercut. It can transmit the forces but be of advantage if the holding teeth have undercut teeth, this is also advantageous, for example, in the case of a bidentate pair of retaining teeth is to be realized. The anti-locking lugs are on the chain hoops seen and in addition there is an additional at the ends of the inner and outer legs locking provided. This undercut of the holding teeth is an advantage created a claw-like connection that has a retracting effect and counteracts any bends. Resulting from the sawtooth shape overall advantages compared to conventional lock teeth in that one stronger tooth shape can be reached with a much thicker tooth base. The manufacturing the This holding tooth can be done with profile milling cutters, so that production is easier. In addition, the assembly of the chain lock by the cross-section ko African form of the tooth also ultimately simplified.  

The version described, whether with undercut teeth or without such an interlocking can be further improved in the direction of freedom from clanking by placing the outer retaining teeth at an angle and parallel to the tooth inclination have running tongue and groove locking. This makes freedom of movement one suspended chain links on the main specified by the conveyor or planer functions limited, so that operational safety is increased and due to the Zipper effect anyway ineffective use of anti-locking bars can be omitted.

Another way of stabilizing such chain locks in the loading rich the ends of the legs can be achieved according to the invention in that the outer retaining teeth are designed to result in a fork lock. The long Au ßenschen are advantageous at their ends against lateral displacement and too additionally secured.

Secure the fork lock against bending with a shear bolt secured fork locks according to the present invention. This shear bolt is Normally hardly burdened, since the respective, the inner and outer legs connect Ending bidentate pair of holding teeth preferably with the tooth root plane inclined at 4 ° so-called saw teeth is equipped.

With a bidentate pair of retaining teeth, it is an advantage if how around which a horizontal center piece is used, which is secured with locknuts and the locking lugs are provided on the chain hoists. The fork locking with the shear bolts allows reinforced outer legs at the bow transition. For this purpose, it is advantageous if the anti-clipping tabs have an expanded anti-clogging resultant area and maintain a lock thickness of c = 41.

In turn, a continuation serves to optimize the safety of the staking tion, in which the middle piece in the eyelet area has an anti-locking collar is trained. This collar guides the respective adjacent chain link in the chain closed in such a way that the movement of the adjacent chain link was exactly specified  ben and is restricted.

The easing of the assembly serves above all an education in which the Middle piece with a long support base made in two parts and by one or two Through bolts are secured. The through screws are 2 Cylinder screws with square nuts. Other connection units are also possible bar.

Another way of securing the outer and inner thighs is at the end of the outer leg and the inner leg of each lock half a so-called locking lug is provided, which is in a fork-shaped recess the bow approach of the adjacent half of the lock is arranged in an engaging manner is trained. This is an advantageous safeguard against lateral displacement and at the same time realized an anti-slimming device. These locking lugs are in the eyelet area and preferably in addition to those on the outside safety systems provided on the leg ends.

Various versions have been pointed out above, which relate to Absorption of separating forces but also for optimal transmission of the main tensile force through special design of the middle piece and the associated ends of the shanks kel are provided. This is further optimized by the fact that the long legs of the Z-shaped component is convexly curved at the end in plan view and together with one the groove associated with the inner leg are formed to form a channel into which a arcuate securing element is driven. This will be without essential Loss of cross-section on the inner legs is an advantageous, form-fitting connection dung, not only the securing elements, but above all that of the step block trained center piece, so that a operational safety jeopardizing Loss of the center piece, for example, when passing through the conveyor chain belt the one rotating at high speed, crushing stone and coal Impact roller of a flow breaker or spring-like when breathing and swinging pulsating conveyor chain, as well as with jerky loads and violent Shocked chain chain and not least under the pile on the transition  bestations while running over the hard mountain pieces rotating there in the crowd the chain-dragging sprockets and considerable complications caused, is excluded.

To round off the anti-tamper protection, it is provided that the ends the inner leg, in particular in the case of a design designed as a double retaining tooth, the chain eyelet of the neighboring half of the lock is almost circular over an antiver clearing collar are formed limiting. This creates a hollow, round envelope curve shape, which is a clipping or dipping into the chain lock prevent the chain link from hanging in the clear interior of the chain eyelet and thus premature lock destruction are excluded as the anti-stripping collar not in the wear area of the chain link, but contactless under tension lie in the shadow of the chain and are not exposed to wear. A touch with the chain link only in the case of a chain jam with the resulting hanging chain in one Deflection angle of 67 ° in the chain hinge is not a problem, the force effect with hanging chain only from negligible dead weight components stands.

The anti-stripping collar is expediently of a hollow round one Envelope and thus two barrier walls predefined. The adjacent chain link is thus optimally secured in the chain lock. Another alternative is provided hen to increase the effect of the barrier walls by making the hinges Chain eyelet is restricted from 67 ° to 40 °, namely by a cross-section crescent-shaped bow thickening of the chain assigned to the groove width of the chain wheel lock, which eliminates the use of six-toothed sprockets, the smallest Size in the category of these robust mining chains are guaranteed remains. For this purpose, the chain bows have a primarily crescent-shaped bow thickening. The risk of getting stuck is further limited and in the form of an allowance for wear the strength in the respective joint area of the chain lock is increased. Ge According to a further variant, the bow thickening can even be profiled Anti-clipping nose can be designed with the effective information cited there.  

In the case of a single-tooth pair of holding teeth, it is particularly advantageous if the retaining tooth of the outer leg is centered in the longitudinal direction of the lock continuous groove and the associated tooth gap of the inner leg one have correspondingly shaped spring. Lateral and torsional forces can be secured be mastered. This tongue and groove design is advantageously protected between the respective paired outer and inner thighs by the tooth of the outer thigh a groove running in the longitudinal direction of the chain lock in the middle of its width having. The corresponding tongue can engage in this groove.

According to a further development, it is provided that the spring can be replaced with the Inner thigh is connected, which for the first time to the ineffective concave / convex extremely resistant nesting of the two lock halves against cross forces are created, as is particularly required in crusher conveyors, where the toothed chain locks especially in a horizontal position due to the impact of the crushing rollers charged with high kenetic energy and ko cause intense operational disturbances. Another advantage is that the Elimination of the nose / fork locking a tooth thickness of the monodentate pair of retaining teeth can be significantly enlarged and by the tooth thickness and the connection with the short, compact outer leg gets an extremely robust character.

A determination, namely a permanent determination of the centerpiece, will achieved in particular in that the Z-shaped center piece, for example, as a stu fenklotz trained and between him and the interior having a central groove a securing element with a correspondingly shaped attachment can be driven in, the ends of the securing element bendable in the direction of the step block forms are. The safety piece surrounds the step block in a lock-tight and flush manner, the constriction of the legs is designed to be easy to dismantle by the bent ends of the securing element free space for attaching a chisel or other explosive device is present.

Finally, the assembly is also made easier by the fact that the safe element on one side has a finished head shape, on the opposite  Side is split like a cotter pin and has legs that can be bent in both directions. As a result, the two securing elements can advantageously after insertion of the middle piece can be inserted into the lock connection by using it as a rod square cross section shaped securing element with one side already finished Head shape at the other end on his split-pin slotted thighs the head shape how to bend to reach the opposite side. The bent Legs are flush in the recesses of the lock halves and the center piece and stored in a protected manner, with all blind processes during assembly as they are almost All tooth locks in the form of hidden spring clips, snap rings, spring hollow cylinders and balls stick to snap and bayonet locks, no longer apply and the associated imponderables no longer have an effect can. This is a form-fitting, visible and controllable at all times Secured connection created, moreover, by the same, spread Head shape of the securing element is easy to assemble and disassemble.

Finally, a wedge locking of the center piece is also possible, the Invention for this purpose provides that the middle piece is fixed by means of two opposing transverse wedges is set, which preferably have a suit from tg 1:25 to tg 1: 100. The The center piece is thus secured for frictional engagement by the two opposing cross sections chert, assuming and assuming that they are rarely resolved and retouched must be an effective tension connection.

The invention is characterized in particular by the fact that further securing opportunities for the chain lock are created that prevent both transverse forces or record, as well as ensure that the to be recorded in the longitudinal direction Forces can be absorbed easily. The individual lock halves are like this shaped and designed so that not only the usual holding teeth mesh, but that additional anti-locking lugs as well as tongue and groove locks or fork locks ensure that further couplings and friction locking Generating connections are specified, through which an optimal determination of the individual parts of the chain lock to each other while achieving a high Anti-clipping security become possible.  

Further details and advantages of the subject of the invention result itself from the following description of the accompanying drawing, in which a before zugtes embodiment with the necessary details and items is shown. Show it:

Fig. 1 chain lock with monodentate retaining tooth pair and Antiver klankungsnasen,

Fig. 2 a longitudinal section through the chain lock according to FIG. 1,

Fig. 3 Chain lock according to Fig. 1 with a shortened outer's angle,

Fig. 4 chain lock with parallelogram-like center piece,

Fig. 5 cross-section through the chain lock according to Fig. 4,

Fig. 6 chain lock klankungsnasen with multiple retaining tooth pair with Antiver,

Fig. 7 cross-section through the master link of FIG. 6

Fig. 8 Mehrfachhaltezahnpaariges chain lock with extended support base for the central part,

Fig. 9 cross-section of the chain lock according to FIG. 8 connected at both ends tig caulked ring nut,

Fig. 10 cross-section according to Fig. 9, but with one side caulked ring nut,

Fig. 11 chain lock with saw teeth and extended middle part, below 16 ° inclined,

Fig. 12 chain lock according to FIG. I 1, but below 12 ° inclined,

Fig. 13 chain lock according to FIG. 11 with a thickened central portion,

Thick Fig. 14 chain lock according to FIG. 11 with enlarged tooth shear and horizontal verlaufendem midsection,

Fig. 15 chain lock according to FIG. 14 but with saw teeth ausgerü stetem midsection,

Fig. 16 chain lock with bidentate retaining tooth pair and spring-locking groove with unterschnittenem tooth base,

Fig. 17 chain lock according to FIG. 16 with reduced undercut of the tooth base,

Foot Fig. 18 Chain lock according to Fig. 16 without unterschnittenem tooth,

Fig. 19 cross-section through the master link of FIG. 18,

Fig. 20 cross-section of a lock thickness of 41 mm and 46 mm,

Fig. 21 further cross sections of the chain lock in the bow area,

Fig. 22 chain lock according to FIG. 16 foot without unterschnittenem tooth,

Fig. 23 chain lock with Gabelarretierung,

Fig. 24 Chain lock according to Fig. 23 with a two-piece means,

Fig. 25 longitudinal section through the chain lock according to FIG. 24 with a through-bolt,

Fig. 26 longitudinal section through the chain lock according to FIG. 24 with two through-bolts,

Fig. 27 cross-section of the chain lock according to FIG. 24 bolts with shear,

Fig. 28 chain lock with monodentate retaining tooth pair with comple Zender Fuse,

Fig. 29 mean log by the master link of FIG. 28 with steps and inserted retaining piece,

Fig countries. 30 section of the chain piece with adjacent chain Glienicke and Antiverklankungskragen,

Fig. 31 chain lock according to FIG. 28 but with additional thickeners bow,

FIG. 32 section of the chain lock according to Fig. 31,

Fig. 33 section, by the master link of FIG. 31 with a form-fitting secured stages Klotz as centerpiece

Fig. 34 Neck kung nose from a longitudinal section of the chain lock according to FIG. 28 and Antiverklankungskragen Antiverklan,

Fig. 35 with changed Fuse chain lock,

Fig. 36 cross-section through the master link of FIG. 35,

FIG. 37 section of the master link of FIG. 35,

Fig. 38 another type of securing the step block in addition to the representation of Fig. 37 and

Fig. 39 Wedge lock for the center piece, shown in cross section.

Fig. 1 shows a chain flat lock 1 , which consists of two lock halves 2 , 3 , which are secured and braced against one another via an interposed locking element 4 . In a departure from known chain locks, a lock foot 5 is provided here, which runs centrally through the locking element 4 and in such a way that in addition to the retaining teeth 10 , 11 , 12 formed between the outer legs 6 , 8 and the inner legs 7 , 9 , additional teeth in Form the area of the locking element 4 or create such. The tooth gaps between the holding teeth 10 , 11 , 12 are designated 13 and 14 .

Fig. 1 illustrates that a pair of retaining teeth with retaining teeth 10 per inner and outer legs 6 , 7 , 8 , 9 is realized here. The total tooth thickness per angle is remarkable, with additional holding tooth pairs 44 , 45 being formed on the respective facing sides 15 , 16 of the inner leg and outer leg 6 , 7 , 8 , 9 .

Is inserted centrally in the embodiment of Fig. 1 and also shown in FIG. 2, a Z-shaped component 26 which serves as a center piece 18 and ensures that the engaging in the chain loops 19, 20 adjacent chain links in the chain lock or chain flat lock 1 are safely stored and guided. The core 27 of the Z-shaped component 26 is designed and arranged so that the already mentioned Zusatzhal tezahnpaare 44 , 45 result, wherein the legs 29 can be made correspondingly long. The Z-shaped component 26 can also have the overall shape of a step block 28 .

The chain brackets 65 , 66 are each provided with an anti-locking nose 67 , which results in an effective anti-locking in the main pulling direction. In the swivel range of 39 ° with the version only with the anti-locking nose 67 , a reduction in the locking of 28% is ensured in the bend range of 140 °. The head surfaces 57 of the holding teeth 10 , 11 , 12 are designed to be somewhat curved, so as to additionally counteract a risk of getting stuck.

Both in Fig. 1 as well as Fig. 2 and Fig. 3 is a monodentate retaining tooth pair is embodied 49, wherein additional detent bump 70 and the locking groove are seen 71 to print on this way, an overload of the outer legs 6, counteract. 8 In the embodiment according Fig. 3, the tooth thickness is Gert to 22 mm verrin, so that the outer legs 6, 8 mm to about 15 may be formed shorter. Here, too, the anti-clipping lugs, which can be seen particularly clearly in FIG. 2, are designated by 67 .

In a departure from the representations in FIGS. 1 and 3, the chain lock 1 according to FIG. 4 is provided with a central piece 18 of parallelogram cross-section. The additional retaining tooth pairs 44 , 45 thus also result here.

Fig. 5 illustrates the formation of the locking hump 70 and locking nut 71 , the middle piece 18 is secured via a screw connection not explained here.

FIGS. 6 to 13 show 1 chain locks with a long supporting base 72, 73 having central portion 18. These centerpieces 18 are secured with a Nutmut ter 74 , as can be seen in FIG. 7. Moreover 9 and Fig. 10 is shown in FIG. Provided that is possible for the ring nut 74 is caulked after being tightened accordingly. According to FIG. 9, a calking of the lock nut 74 is even provided on both sides. This type of fixing of the middle piece 18 can therefore also be referred to as a central screw / shrink connection 75 . This can also be a shrink ring 76 which, as indicated for example in FIG. 7, is shrunk onto the corresponding part of the middle piece 18 .

Exactly as in FIGS. 6 and 8, a middle piece 18 is also shown in FIGS . 11, 12 and 13, which is arranged obliquely and in parallel to the holding teeth 10 , 11 , 12 durably. While prolonging mm according to FIG. 8, the supporting base 72, 73 of the center piece 18 to about 10, a certain inclination is shown in FIG. 11 is provided. Here the middle part 18 and the saw teeth 10 , 11 , 12 are inclined at 16 °. According to FIG. 12, the inclination is reduced to 12 °, so that a tooth root thickness of the tooth 12 near the eye can be increased by 4 mm by 16 mm. According to Fig. 13 teeth and middle section 18 is also inclined at 12 °, but the central part is thickened mm by 2 18. As a result, the inner thigh hub is evenly 24 mm thick and also thicker in the eyelet area.

Fig. 14 and Fig. 15 correspond to each other, here the central part 18 and toothing 10 , 11 , 12 are not inclined, but are shown horizontally straight in the direction of pull. The tooth shear thickness is 19 mm by 6 mm thicker and the tooth root thickness of the tooth 12 close to the eye is 20 mm by 4 mm thicker.

In the embodiment according to FIG. 15 there is also the fact that the central part 18 is provided with saw teeth 77 and thus becomes a load-bearing element. The load distribution is optimized and harmful stress concentrations are advantageously avoided in the root of the inner legs 7 , 9 . With 78 the engagement is designated, into which the sawtooth 77 projects accordingly.

The embodiment of the chain lock 1 shown in FIG. 16 corresponds in terms of basic structure to the embodiments described above, only that here a two-toothed pair of retaining teeth is shown, in which the tooth base is shown horizontally and undercut. A broad bow cross-section to the outer thigh may have an extended anti-clinging. Here, a tongue and groove locking device 80 is shown , this securing being combined with the anti-locking tabs 67 . The middle part 18 lies horizontally and, as described further above, is fixed in such a way that the two lock halves 2 , 3 cannot fall apart after the corresponding locking of the middle part 18 .

In the embodiment according to FIG. 17, a tongue-and-groove locking device 80 is also implemented, an undercut toothing 79 likewise being implemented. The undercut toothing 79 results in a claw-like connection which advantageously has a retracting effect and counteracts bending.

The embodiment according to FIGS. 18, 19 and 22 also counteracts deflections, here also the tongue-and-groove locking device 80 is shown and the special design of the chain hoops 65 , 66 according to FIGS. 20 and 21.

Fig. 23 and Fig. 24 show a special design in that here additional Lich or only a fork lock 81 is provided in the region of the ends of the outer legs 6 , 8 , additional securing can be achieved by additional shear bolts 82 . This fork lock 81 is particularly illustrated in Fig. 27, where the shear pin 82 represents an additional safeguard against bending, which, however, is normally hardly loaded, since the respective, the inner and outer legs 6 , 7 , 8 , 9 connecting bidentate Holding pair of teeth is preferably equipped with so-called saw teeth in a tooth base plane inclined below 4 °.

FIGS. 25 and 26 illustrate that even a two-piece center piece 18 can be used, which is equipped with a Antiverklankungskragen 85 namely in the eye region 84th Via a through screw 86 or two through screws 86 , 87 , the two parts of the middle piece 18 ', 18 "are effectively connected to one another and thus also fixed.

In the embodiment of Fig. 28 is a flat chain lock 1 in monodentate training. Here both locking bumps 70 and locking groove 71 are provided, as well as additional securing lugs 89 and fork-shaped recesses 90 assigned to the end 88 . About these locking lugs 89 and fork-shaped recesses 90 results in a safeguard against transverse displacements and Drehbe movements. Only this stabilized embodiment acts as an additional or only as an anti-stripping device. Fig. 28.1 shows the special design of these safety parts 89 , 90 .

In Fig. 28.2 and Fig. 29, an arc-shaped securing member 95 as will be heard over this a Z-shape, a flash adds resembling molding as a means piece 18. At the rectangular core of this molded part is a point-symmetrical leg adjoins, the end of which is designed in a convexly curved manner in plan view of the molded part and in function with a concave groove 93 of the inner leg 7 , 9 of each lock half 2 , 3 above or below the retaining teeth of the adjacent inner leg 7 , 9 form a curved channel 94 of rectangular cross section. In this channel 94 , the curved arc-shaped securing element 95 can be driven with hammer blows, which is then held in the installed position by means of pretensioning. In addition, it is also possible that the curved channel 94 has at both ends with grooves formed in the inner legs 7 , 9 , in which the arcuate safety element 95 is inserted before installation, with a unilaterally finished head shape 109 , which after installation in the recess of the detonating groove 112, which is also designed for releasing, comes to rest, while on the opposite side of the chain lock 1, a leg 108 or 107 of the split-slotted end 106 is bent around and also comes into contact in the detonating groove 112 , as a result of which there is no substantial loss of cross-section on the inner legs 7 , 9 there is an advantageously positive connection not only of the two securing elements 95 , but above all also of the middle piece 18 designed as a step block, so that a loss of the middle piece 18 which endangers operational safety, especially when the conveyor chain belt passes under the impact roller, cannot occur.

Corresponding explanations also illustrate once again FIGS. 31 and 33, while FIGS . 30, 32 and 34 ben the anti-ankle collar 85 , which here form an upper barrier wall 97 and a lower barrier wall 98 . As a result, the position and guidance of the connecting member 83 , 83 'is correspondingly ensured. While according to the embodiment according to Fig. 28.2 arcuate fuse element 95 with respect to the center leg 108 in accordance with the arc-shaped middle piece 18 is also bent, is the means by the particular embodiments piece 18 of FIG. 33, a positive locking on the corresponding ge bent fuse element 95 reached. Here, too, the two legs or the two ends 104 , 105 of the legs 107 and 108 of the securing element 95 are bent in such a way that a corresponding securing is achieved.

In the embodiment according to FIGS. 35 ff., An additional securing is achieved by the groove 99 and the tongue 100 , FIG. 36 illustrating their design and position. Referring to Fig. 37 is due to the special design of the arcuate hedging element 95 with the central groove 102 and to assign the corresponding approach 103 down. Figure 38 finally. Shows an embodiment are used in the likewise arcuate locking elements 95 are used, the slotted ends are bent in accordance with 106, while the finished header 109 form a simple mounting it enables. The whole thing can be additionally stabilized by a screw which is only indicated here.

Fig. 39, finally, shows an embodiment with a wedge lock, wherein the center piece 18 on friction fit by the two opposing cotters 110, is saved 111, and indeed as a spline connection, which is rarely achieved and a suit of 1: 25 has.

With regard to the embodiment according to FIG. 32, it should additionally be pointed out that, similar to the anti-locking nose 67 according to FIG. 34, crescent-shaped bow extensions 91 or bow thickenings 92 can also be realized. The crescent-shaped, the groove width of the sprocket corresponding bow thickenings 92 of the chain lock 1 contribute to the anti-clinking and increase in the form of a wear allowance the Fe strength in the respective joint area of the chain flat lock 1 . Together or also alone with the anti-locking collar 85 , a locking of the connecting member 83 is prevented. The hinge of 40 ° ensures the use of six-toothed sprockets with a hinge angle of 30 °.

In the embodiment according to FIG. 34, the already mentioned anti-clogging nose 67 is realized, which can be adapted to the groove width of the chain wheel and has a profile of <60 °, preferably 80 °. This anti-locking nose 67 restricts the risk of locking so much that it is in some way fully effective even without the anti-locking collar 85 . In addition, this version allows the use of six-toothed sprockets and all function-related degrees of freedom for conveyors and planing chains, such as are required when running through curved and curved channels, rolling curves, looping back and over sprockets and deflection rollers.

All of the above-mentioned features, including those that can only be taken from the drawings, alone and in combination are regarded as essential to the invention.

Claims (27)

1.Chain lock for link chains, especially for link chains used in underground mining and tunnel construction, with two U-shaped lock halves ( 2 , 3 ) and a locking element ( 4 ) designed as a middle piece ( 18 ) which fits into the closing joint ( 5 ) between the alternately on the outer ( 6 , 8 ) or inner legs ( 7 , 9 ) with interlocking locking teeth ( 10 , 10 ', 11 , 11 ', 12 , 12 ') fitted in the closed state between the lock halves ( 2 , 3 ) between whose inner legs ( 7 , 9 ) can be pushed in and fixed there, the mutually facing sides (15, 16) of the inner legs ( 7 , 9 ) intermeshing tooth-like and the middle piece ( 18 ) equipped according to the patent (according to patent application 198 53 643.7) , characterized in that the chain brackets ( 65 , 66 ) are each provided with an anti-locking nose ( 67 ). 2. Chain lock according to claim 1, characterized in that the anti-anchoring lug ( 67 ) is designed to result in an anchoring-free pivoting zone of around 40% and preferably extends over 45 mm. 3. Chain lock according to claim 1, characterized in that the tooth thickness is reduced from 30 to 22 mm in a training with monodentate retaining tooth pairs ( 69 ). 4. Chain lock according to claim 1, characterized in that the central piece ( 18 ) is designed in parallelogram cross-section. 5. Chain lock according to one of the preceding claims, characterized in that the inner legs ( 7 , 9 ) with locking bumps ( 70 ) and the outer legs ( 6 , 8 ) are equipped with correspondingly designed locking grooves ( 71 ). 6. Chain lock according to one of the preceding claims, characterized in that the center piece ( 18 ) has a long support base ( 72 , 73 ) and is equipped with a central screw or shrink connection ( 75 ). 7. Chain lock according to one of the preceding claims, characterized in that the eyelet-holding tooth ( 12 ) of the inner leg ( 7 , 9 ) is reinforced and curved. 8. Chain lock according to one or more of the preceding claims, characterized in that the sawtooth-shaped retaining teeth ( 20 , 11 , 12 ) and the center piece ( 18 ) have the same or a different inclination. 9. Chain lock according to one or more of the preceding claims, characterized in that the middle piece ( 18 ) and the sawtooth-shaped retaining teeth ( 10 , 11 , 12 ) are designed to run horizontally in the direction of pull. 10. Chain lock according to one of the preceding claims, in particular claim 9, characterized in that the center piece ( 18 ) is provided on both sides with saw teeth ( 77 ) which are designed to be load-bearing and engaging in the inner legs ( 7 , 9 ). 11. Chain lock according to one of the preceding claims, characterized in that the retaining teeth ( 10 , 11 , 12 ) have an undercut toothing ( 79 ). 12. Chain lock according to one of the preceding claims, characterized in that the outer retaining teeth ( 10 ) have an oblique and parallel to the tooth inclination de tongue and groove lock ( 80 ). 13. Chain lock according to one of the preceding claims, characterized in that the outer retaining teeth ( 10 ) are designed to result in a fork lock ( 81 ). 14. Chain lock according to claim 13, characterized in that the fork lock ( 18 ) is secured with a shear pin ( 82 ). 15. Chain lock according to one of the preceding claims, characterized in that the anti-locking lugs ( 67 ) are designed to result in an expanded anti-locking zone and maintain a lock thickness of c = 41. 16. Chain lock according to one of the preceding claims, characterized in that the middle piece ( 18 ) in the eyelet region ( 84 ) is designed to have an anti-locking collar ( 85 ). 17. Chain lock according to one of the preceding claims, characterized in that the center piece ( 18 ) with a long support base ( 72 , 73 ) is formed in two parts and is secured by one or two through screws ( 86 , 87 ). 18. Chain lock according to one of the preceding claims, characterized in that at the end ( 88 , 88 ') of the outer leg ( 6 , 8 ) and the inner leg ( 7 , 9 ) of each lock half ( 2 , 3 ) a securing lug ( 89 ) is provided is, which is arranged and formed engagingly in a gabelför shaped recess ( 90 ) of the nose ( 91 ) of the respectively adjacent lock half. 19. Chain lock according to one of the preceding claims, characterized in that the long leg (29) of the Z-shaped member (26) end is convexly curved in plan view and, together with a the inner leg (7, 9) associated with the groove (93) has a channel ( 94 ) are formed forming, in which an arcuate securing element ( 95 ) can be driven. 20. Chain lock according to one of the preceding claims, characterized in that the ends ( 88 ') of the inner legs ( 7 , 9 ), in particular in the case of a design designed as a double hook tooth, the chain eyelet ( 19 , 20 ) of the adjacent lock half approximately circularly over a Anti-stripping collar ( 85 ) are designed to be limiting. 21. Chain lock according to claim 20, characterized in that the anti-locking collar ( 85 ) is formed by a hollow-round envelope and thus two barrier walls ( 97 , 98 ). 22. Chain lock according to claim 20, characterized in that the chain brackets ( 65 , 66 ) have a crescent-shaped bow thickening ( 92 ). 23. Chain lock according to one of the preceding claims, characterized in that the retaining tooth ( 10 ) of the outer leg ( 6 , 8 ) centrally has a groove ( 99 ) running continuously in the longitudinal direction of the lock ( 1 ) and the associated tooth gap ( 13 ) of the inner leg ( 7 , 9 ) have a correspondingly shaped spring ( 10 ). 24. Chain lock according to claim 22, characterized in that the spring ( 100 ) is interchangeably connected to the inner leg ( 7 , 9 ). 25. Chain lock according to one of the preceding claims, characterized in that the Z-shaped central piece ( 18 ) is designed as a step block ( 28 ) and between it and the inner leg ( 7 ) having a central groove ( 102 ) has a securing element ( 95 ) with a correspondingly shaped Approach ( 103 ) can be driven in, the ends ( 104 , 105 ) of the securing element ( 95 ) being bendable in the direction of the step block ( 28 ). 26. Chain lock according to one of the preceding claims, characterized in that the securing element ( 95 ) has a finished head shape ( 109 ) on one side, is split like a split pin on the opposite side and has bendable legs ( 107 , 108 ) in both directions. 27. Chain lock according to one of the preceding claims, characterized in that the middle piece ( 18 ) is fixed by means of two opposing transverse wedges ( 110 , 111 ), which preferably have a tightening of tg 1:25 to tg 1:100.