Toothed belt lock and heating press with a toothed belt drive

Abstract

Toothed belt lock (1) for power-transmitting connection of two toothed belt ends (2), comprising a base body (3), wherein the base body (3) has two separate belt receptacles (4) for the force-transmitting reception of an end section of a respective toothed belt end (2), wherein the belt receptacles (4) are each formed by a negative profile, which is designed as a negative of an end section of a respective toothed belt end (2) to be received, with a front (5) designed as a negative of a tooth profile of a toothed belt (19) and a back (6) that is flat in itself, designed as a negative of a flat back (6) of a toothed belt (19), such that the end section of the respective toothed belt end (2) can be received in the respective belt receptacle (4) in a form-fitting manner, wherein the belt receptacles (4) are oriented relative to each other such that the front faces (5) of the belt receptacles (4) are facing each other, wherein the base body (3) has two rounded deflection areas (7), each of which is connected to an end cross-section of one of the belt receptacles (4) at which a respective toothed belt end (2) exits the belt receptacle (4), wherein the deflection areas (7) are assigned to the rear sides (6) of the belt receptacles (4) facing away from each other, so that a deflection section of a respective toothed belt end (2), which is directly connected to the end section of the respective toothed belt end (2) received in the respective belt receptacle (4), can with its flat rear side (6) be placed against the respective deflection area (7) and can thus be deflected on the base body (3), characterized by the fact that the belt receptacles (4) are oriented parallel to each other and spaced apart from each other in the base body (3), wherein the base body (3) is formed of base body parts (9, 10) which can be connected to each other in a force-transmitting manner and which can be separated from each other without damage, wherein the base body (3) is divided along a division plane which is oriented parallel to the longitudinal axes of the belt receptacles (4) and perpendicular to the rear sides (6) of the belt receptacles (4).

Description

[0001] The invention relates to a toothed belt lock according to claim 1 and to a set comprising a toothed belt lock and two toothed belt ends to be joined together according to claim 9. The invention also relates to a heating press according to claim 13 and to a method for operating a heating press according to claim 16.

[0002] Timing belts are widely used in mechanical engineering for torque transmission. They are drive belts with teeth and work in conjunction with a toothed pulley. The timing belt and pulley have corresponding teeth, allowing the timing belt to engage with the pulley. In this way, the pulley guides the timing belt around itself.

[0003] The timing belt has teeth on its inner side, which faces the toothed pulley. These teeth are usually made of an elastomer and engage with the toothed pulley.

[0004] Timing belts offer an alternative to chain drives or flat / V-belts. Chain drives are very rigid, while flat / V-belts, although relatively elastic, are unsuitable for transmitting high forces because they would slip. In contrast, timing belts are suitable for transmitting high forces.

[0005] Since timing belts are typically manufactured as essentially endless, i.e., continuous, lengths, they must be cut to the desired length during production. This necessitates subsequently joining the two ends of the timing belt to create a continuous belt without an open end. Joining two initially separate ends of a timing belt to create a closed belt can also be advantageous, as it facilitates the installation of the timing belt on its associated fixture. State of the art

[0006] The general state of the art reveals numerous known methods for joining timing belt ends. For example, the timing belt ends are provided with corresponding recesses, such as in a zigzag pattern, so that they engage with each other in a form-fit manner. The timing belt ends are then bonded together, for example, by gluing or joining materials, such as by welding or soldering. Alternatively or additionally, at least one pin can be inserted through the timing belt in the transverse direction, at least in the area of ​​the form fit, i.e., in the zigzag area. The pin is thus positioned transversely to or within the timing belt in such a way that both timing belt ends are penetrated by the pin, at least in the area of ​​the form fit.In other words, the timing belt ends are not only held together by a material bond, for example by gluing, welding, and / or soldering, but also by at least one pin, which acts as a retaining element, at least indirectly connecting the two timing belt ends in a form-fit manner. Such connections are known in engineering as "pin joints." This provides a relatively stable connection between the timing belt ends.

[0007] Another way to join the timing belt ends is to use clamps. For this, the respective timing belt ends are attached to one side of the clamp, for example with nails and / or screws.

[0008] Due to their advantageous properties, V-belts have displaced or replaced chain drives, particularly where relatively low torques need to be transmitted. One advantage of V-belts, for example, is their significantly lower slippage compared to chain drives or flat belts.

[0009] The use of timing belts in applications where relatively high torques are involved and the timing belts are therefore subjected to particularly high loads is currently limited due to the inherent limitations of existing technology for connecting the timing belt ends. Current solutions do not provide a sufficiently strong connection between the timing belt ends to be used in demanding applications, i.e., applications with high torques and / or high jerk loads and / or large moments of inertia.

[0010] One such application is in hot presses designed for the intermittent processing of flat, pressed blanks. These blanks—often heavy—are cyclically fed into the hot press. Typically, the blanks are transported on a conveyor belt so they can be fed into the hot press at the start of a new pressing cycle. A high torque is particularly necessary to start the conveyor belt, as the blank on it must also be accelerated. In other words, the torque must be high enough to overcome the inertia of the mass, i.e., the conveyor belt itself and the blank on it. In practice, it has been shown that toothed belts are unsuitable for this application because they tend to break at the joint between the belt ends.In other words, the state-of-the-art solutions for connecting two toothed belt ends are not suitable for operating the heating press. For this reason, chain drives continue to be used to drive the conveyor belt.

[0011] Document DE 202 07 499 U1 discloses a rotating drive unit that uses a toothed belt whose two ends are connected by a special connecting device. This connecting device consists of a T-shaped central element and two side elements into which the belt ends are inserted and mechanically fixed. The drive unit is pivotally attached to this connecting device and transmits the rotating motion of the toothed belt into a linear reciprocating motion.

[0012] Document DE 693 15 617 T2 discloses a strip assembly with an attached unit that serves to connect toothed strip sections. The strip sections are bent out of the path in the area of ​​the unit and their tooth flanks engage with retaining elements of the unit. The unit has a connecting section with support contours and can be designed as a block-shaped body with channels for the positive-locking reception of the strip ends.

[0013] Document DE 10 2005 038 446 A1 discloses a connecting unit for the force-fit connection of loose tension member ends, in particular toothed belts. The unit consists of a body with a tension member channel and a clamping device arranged therein. The tension member ends are inserted together through a first opening and clamped against the channel walls by a wedge-shaped element and additional receiving elements. An adjustment mechanism, consisting of at least one screw, presses the clamping device into the channel, and a locking bar prevents it from falling out. Task

[0014] The object of the present invention is to eliminate the disadvantages of the prior art and to be able to connect two toothed belt ends particularly firmly together, so that they can withstand particularly high torques. Solution

[0015] This problem is solved by a toothed belt lock according to claim 1.

[0016] According to the invention, a toothed belt connector is provided for the force-transmitting connection of two toothed belt ends. The toothed belt connector has a base body, which comprises two separate belt receptacles for the force-transmitting reception of an end section of each toothed belt end. For this purpose, the belt receptacles are each formed by a negative profile, which is designed as the negative of an end section of the respective toothed belt end to be received. The belt receptacles thus correspond to the respective toothed belt end to be received in such a way that the latter "fits" into the belt receptacle, and is therefore at least substantially positively interlocked.

[0017] The negative profile comprises a front surface designed as the negative of a tooth profile of a timing belt and a flat back surface designed as the negative of a flat back surface of a timing belt. In other words, the negative profile is designed to match both the flat back surface of the timing belt and its toothed front surface. This ensures that the end section of the respective timing belt fits precisely and securely into the belt receptacle.

[0018] Furthermore, the belt mounts are designed to be oriented relative to each other such that their front faces are aligned. Since the timing belt is typically driven by a toothed pulley, and the teeth of the timing belt engage with the pulley, the teeth of the pulley face the pulley. Therefore, because the front faces of the belt mounts are aligned, the timing belt connector is, in effect, facing the timing belt. In its largely complete state, the timing belt connector sits, so to speak, on the back sides of the timing belt ends it joins.

[0019] The main body has two rounded deflection areas, each of which connects to an end cross-section of one of the belt receptacles where a toothed belt end exits the receptacle. The deflection areas are thus arranged such that they are located, at least substantially, directly adjacent to the point where the toothed belt is introduced into or exited from the belt receptacle. The toothed belt therefore leads into or out of the belt receptacle and can subsequently be deflected in the deflection sections adjoining the belt receptacles by means of the deflection areas. This occurs when the deflection sections adjoining the end sections mounted in the toothed belt buckle are pressed against, or are pressed against, the deflection areas.In this way, the timing belt ends leading out of the timing belt lock can adapt to a shape or course of the timing belt, which is in its at least substantially fully installed state, i.e., attached to at least one toothed pulley.

[0020] Furthermore, the deflection areas are assigned to oppositely facing rear sides of the belt holders, so that a deflection section of each toothed belt end, which connects directly to the end section of the respective toothed belt end held in the respective belt holder, can rest its flat rear side against the respective deflection area and thus be deflected by the main body. In other words, the deflection areas and the belt holder are aligned in such a way that the flat rear side of the toothed belt comes into contact with the deflection area, can thus conform to it, and is deflected by it.

[0021] The toothed belt connector therefore advantageously provides a solution by which two toothed belt ends can be joined together in a particularly simple manner, ensuring a very secure hold and enabling them to withstand high torques. This is achieved primarily through the precisely fitting, form-fitting support of the toothed belt end sections within the toothed belt connector, which is capable of absorbing particularly high forces.

[0022] According to a particularly advantageous embodiment of the invention, the deflection sections each extend in the form of a circular arc segment over at least 90°, preferably over at least 135°, and more preferably over 180°, along a longitudinal axis of the respective belt holder, so that each toothed belt can be deflected by at least 90° relative to the respective belt holder in its deflection section following the end section by means of the respective deflection section. In areas away from its toothed belt ends, the toothed belt has a contour that corresponds at least substantially to the contour of the toothed pulley around which and by means of which the toothed belt is guided. Away from the toothed pulley, the toothed belt extends at least substantially along a line, for example, between two toothed pulleys.It is therefore advantageous if the timing belt can be deflected from these two aforementioned contours by means of the deflection section in such a way that it can be guided into the belt receptacle – or, conversely, guided out of it. This creates a radius of curvature on the timing belt, namely where the timing belt leaves its originally defined contour to guide it along the deflection sections into the belt receptacle. In practice, it has been shown that the arc length of the deflection section should lie within the aforementioned range of values ​​so that forces acting on the timing belt can be absorbed particularly well. This results in the advantage that the timing belt, especially in the area of ​​the belt receptacle and the subsequent deflection section, is subjected to particularly low stress and can therefore be used with minimal wear.

[0023] According to a further particularly advantageous embodiment, the deflection sections are arranged so that the back side of each toothed belt end can be guided without interruption at the transition from the belt holder to the deflection section, in conjunction with the respective belt holder and its associated deflection section. This offers the advantage that the toothed belt, and especially its ends, can be received in the belt holder with particular care, as the deflection section defines a minimum radius of curvature that cannot be undercut due to the toothed belt's contact with the deflection section. Furthermore, because the toothed belt ends are guided without interruption from the belt holder to the deflection section, undesirable stress concentrations, for example, can be avoided.This advantageously allows for a particularly robust operation of the timing belt.

[0024] According to the invention, the belt receptacles are oriented parallel to each other and spaced apart within the base body. Preferably, the belt receptacles are arranged parallel to each other such that, in an operating state of the toothed belt connector in which two toothed belt ends are connected by means of the latter, they are oriented at least substantially perpendicular to a main direction of extension of the toothed belt adjacent to the toothed belt connector. In practice, it has been shown that this makes it particularly easy to attach the toothed belt ends to the belt receptacle. Furthermore, it has been shown that the belt receptacles according to this design are particularly good at absorbing forces and thus can hold the toothed belt ends very securely. This results in the advantage that the toothed belt ends can be connected to each other with particular stability, and the toothed belt is therefore particularly resilient.

[0025] According to the invention, the base body is further provided that it is formed from base body parts that can be connected to one another in a force-transmitting manner and can be separated from one another without damage. The base body is divided along a division plane that is oriented parallel to the longitudinal axes of the belt receptacles and perpendicular to the rear sides of the belt receptacles. The base body is thus divisible and can, in particular, be opened and closed again. In this way, the toothed belt ends can be inserted into the belt receptacles particularly easily when the base body is opened for this purpose. Subsequently, i.e., after the toothed belt ends have been or are in place in the belt receptacles, the base body parts can be joined together so that the base body is closed again. The toothed belt ends are then, in effect, "enclosed" in the base body.The main body components can be connected to each other, for example, by means of a screw connection. This has the advantage that the toothed belt ends can be arranged particularly easily in the main body and thus connected to each other.

[0026] A further advantage arises when the dividing plane bisects the base body, so that the two base body parts are at least substantially the same size. In practice, such a design, preferably symmetrical, has proven advantageous.

[0027] Advantageously, according to a further embodiment, the belt receptacles are designed as pocket receptacles in the base body parts, so that the removal of the receptacled end sections of the respective toothed belt ends from the base body in the direction of a transverse axis of the toothed belt ends is blocked when the base body parts are in a connected state. This ensures that the toothed belt ends cannot slip out of the toothed belt lock when the base body parts are connected and the toothed belt ends are received in the belt receptacles. This has the advantage that the toothed belt lock can be used particularly reliably and safely.

[0028] A further advantage arises when the basic body components are each manufactured as a single piece. This is advantageous, for example, for the production of the basic body components, as they can then be manufactured using 3D printing. Furthermore, this results in the advantage that the timing belt lock can be assembled and disassembled particularly easily if it consists of as few parts as possible. Therefore, the timing belt lock is advantageously very easy and cost-effective to manufacture, as well as particularly easy to assemble and disassemble.

[0029] According to a further particularly advantageous embodiment of the invention, a trailer is provided which can be connected to the base body in a force-transmitting manner, preferably to a side surface of the base body. By means of this trailer, further components can be attached to the base body, at least indirectly. In other words, the trailer can, for example, serve as an adapter for further components that would otherwise be difficult or impossible to attach to the base body itself. This offers the advantage that the base body is particularly easy to use and can be connected to a particularly large number of components in a particularly simple manner.

[0030] According to a further particularly advantageous embodiment, the invention is characterized in that the base body parts can be connected to one another in a force-transmitting manner by means of at least one connecting element, so that together they form the base body, wherein preferably the trailer is connected to the base body in a force-transmitting manner by means of the same connecting element. The connecting element can, for example, be a threaded bolt. In this context, it can be provided in particular that the base body parts and / or the trailer have a thread that corresponds to the thread of a threaded bolt. In this way, the threaded bolt can be inserted into the base body parts or their threads, so that the base body parts can be connected to one another in a force-transmitting manner.The trailer can be connected to the base body parts in the same way, namely by first inserting the threaded bolt through the trailer and then screwing it into the thread of at least one of the base body parts.

[0031] Another aspect of the invention relates to a set comprising a toothed belt lock according to one of the preceding embodiments and two toothed belt ends to be connected to each other in a force-transmitting manner.

[0032] A further advantage arises when the timing belt ends to be joined are the ends of a single timing belt or the ends of two timing belts of the same type. This ensures a particularly secure hold of the timing belt ends in the belt holders, making the timing belt connector especially stable and robust. It is also conceivable to design the timing belt connector in such a way that timing belt ends of different types of timing belts can be joined together.

[0033] Furthermore, the invention is particularly advantageously designed if the raised deflection sections, which correspond to a deflection of the deflection segment of the respective toothed belt end by 90° relative to a longitudinal axis of the respective belt holder, are arranged at a distance from one another that corresponds to an integer multiple of the tooth spacing between adjacent teeth of the toothed belt ends. It is also advantageous if the belt holder and the deflection sections are geometrically matched such that, when a toothed belt end is received and its deflection segment is deflected by means of the deflection section of the toothed belt lock, a tooth of the toothed belt end is positioned at the raised point of the deflection section. Consequently, in the operating state of the toothed belt lock, the raised deflection sections advantageously come into contact with the toothed belt precisely where a tooth of the respective toothed belt ends is located.With this design, it is therefore not possible for one raised section of one of the deflection areas to correspond to a point on the back of the timing belt end where there is a tooth, and the other raised section to correspond to a point on the other end of the timing belt where there is no tooth. This design has the advantage that the timing belt can engage directly with a toothed pulley at the raised sections, so that the timing belt buckle can easily rotate on a toothed pulley during operation of the timing belt.

[0034] Another aspect of the invention relates to a heating press for the intermittent processing of plate-shaped pressed products. The heating press comprises a hydraulic press system, at least one heating plate driven by the hydraulic press system, and at least one pressing plate interacting with the heating plate. Furthermore, the heating press comprises at least one conveying device for intermittently conveying pressed products into and out of the working area of ​​the heating plate. The conveying device includes an endless conveyor belt and a conveyor drive suitable for circulating the conveyor belt. The conveyor drive is provided by a toothed belt drive comprising at least one toothed belt, two toothed pulleys interacting with the toothed belt, and at least one conveying drive interacting with at least one of the toothed pulleys.Furthermore, the timing belt has at least two timing belt ends which are connected to each other in a force-transmitting manner by means of a timing belt lock in accordance with the above descriptions.

[0035] According to a particularly advantageous embodiment, the heating press has two conveyor belt drives formed by toothed belt drives, one of which is assigned to each longitudinal side of the conveyor belt. In other words, a conveyor belt drive is located at each end, i.e., at the deflection point of the conveyor belt or toothed belt. The toothed belts of both toothed belt drives each have at least one toothed belt coupling, with the toothed belt couplings being located opposite each other at the same position on the respective toothed belt with respect to the conveyor belt. In other words, it is advantageous if the toothed belt couplings run, so to speak, side by side with respect to the conveyor belt, so that they can be used together technically.

[0036] For this purpose, it is particularly advantageous if each toothed belt coupling has a trailer, and the two trailers together support a support rail extending transversely to one conveying direction of the conveyor system, to which the conveyor belt is attached. If the toothed belt couplings are positioned in the manner described above, the support rail extends precisely transversely to one conveying direction of the conveyor system. The support rail serves to attach the conveyor belt, so that the conveyor belt can be attached to the trailers and thus indirectly to the two toothed belt couplings. This makes driving the conveyor belt particularly easy. Furthermore, the conveyor belt can be replaced very easily, thus advantageously enabling particularly efficient, time-saving, and cost-effective operation of the heating press.

[0037] In a particularly advantageous embodiment, the heating press includes a detection means by which the position of a toothed belt lock relative to the toothed pulleys and / or the presence of a toothed belt lock in a predetermined position relative to the toothed pulleys can be detected. Preferably, the detection means can be a photoelectric sensor. In this way, it is possible, for example, to determine whether a pressing is currently located in the heating press using the photoelectric sensor. Since the heating press is operated regularly in cycles, the toothed belt, particularly as a conveyor belt, always travels the same path between cycles. Consequently, the toothed belt lock is always located at a defined position after the completion of each cycle. The photoelectric sensor can, for example, be positioned there so that it can be determined whether the toothed belt lock is located at that position or not.This allows the system to determine whether the cycle is complete or not. Advantageously, this enables the heating press to be operated in a particularly demand-oriented manner. For example, it is conceivable that a pressing operation cannot be carried out if at least one toothed belt lock is not in its designated position and the detection device cannot detect it.

[0038] Furthermore, the invention relates to a method for operating a heating press according to one of the aforementioned embodiments.

[0039] Advantages of one aspect of the invention are equally transferable to other aspects of the invention, and vice versa. Furthermore, the descriptions of the individual aspects of the invention are transferable to the others, and vice versa. Examples of implementation

[0040] The invention is explained in more detail below with reference to an exemplary embodiment shown in the figures. These show: Fig. 1: a schematic perspective view of a toothed belt lock according to the invention; Fig. 2: a schematic side view of the toothed belt lock and a sectional view according to the section plane shown; Fig. 3: a schematic perspective view of a conveyor belt of a heating press; Fig. 4: a schematic top view and a side view of the conveyor belt; Fig. 5: a schematic detail view of the timing belt lock in the assembled state; Fig. 6: another schematic detail view of the timing belt lock in the assembled state; Fig. 7: a schematic perspective view of the toothed belt lock with a pendant attached to it; Fig. 8: a schematic side view of the toothed belt lock with the trailer, as well as two sectional views according to the depicted section planes; and Fig. 9: Another schematic perspective view of the toothed belt lock with a trailer attached to it.

[0041] Fig. Figure 1 shows a schematic perspective view of a toothed belt lock 1 according to the invention. By means of the toothed belt lock 1, for example toothed belts 19 or toothed belt ends 4 of a toothed belt 19 can be connected.

[0042] One area of ​​application for such toothed belts 19 is, for example, to drive a conveyor belt 14 of a conveyor system 20, such as is used for a heating press. Fig. Figure 3 shows a schematic perspective view of the conveyor belt 14 of the heating press, which is not shown for clarity. The conveying device 20 comprises an endless conveyor belt 14 and a conveyor drive 15 suitable for the circulating drive of the conveyor belt 14. In this case, the conveyor drive 15 is formed by a toothed belt drive, which in this case comprises the toothed belt 19, two toothed pulleys 16 interacting with the toothed belt 19, and at least one conveying drive 21 interacting with at least one of the toothed pulleys 16. The toothed belt 19 can be attached to a support rail 17, or is attached, as shown in Fig. 3 is recognizable.

[0043] Here, the two toothed pulleys 16 are surrounded by the toothed belt 19 in such a way that the belt can be driven by the toothed pulleys 16. Each toothed pulley 16 has a conveyor drive 21, by means of which it can be driven by rotation. In other words, the respective conveyor drive 21 drives the respective toothed pulley 16 by rotation, so that the toothed belt 19 rotates around the toothed pulleys 16. This design is used, for example, in Fig. 5 recognizable.

[0044] Since the timing belt 19 is manufactured to a specific length or cut to that length during production, its two ends 2 must be joined together using the locking mechanism 1. While the timing belt could also be manufactured as an endless length, this would be problematic in conjunction with a hot press, as replacing a timing belt with a new one would be quite labor-intensive. In contrast, inserting an "open" timing belt is particularly simple, but it requires that at least two free ends of the timing belt be connected in a force-transmitting manner.

[0045] The toothed belt lock 1 used for this purpose comprises a base body 3, which is formed from two base body parts 9, 10 that are at least substantially identical. This is shown in Fig. 1. Furthermore, the toothed belt lock 1 comprises two connecting elements 11, which in this case are designed as threaded bolts. The connecting elements 11 thus allow the base body parts 9, 10 to be connected to one another. It is also provided that at least one of the base body parts 9, 10 has two threaded sections 18 corresponding to the connecting elements 11. This is evident in Fig. 8 recognizable.

[0046] To enable the toothed belt ends 2 to be connected to each other by means of the toothed belt lock 1, the latter comprises two belt receptacles 4. Each belt receptacle 4 is formed by a negative profile, which is designed as a negative of the respective toothed belt end 2. In this context, the negative profile of the belt receptacles 4 corresponds to a front 5 and a back 6 of the toothed belt 19. In other words, the negative profile of the belt receptacle 4 is designed such that it corresponds to both the toothed front 5 of the toothed belt and its flat back 6. In this way, each toothed belt end 2 can be precisely and positively engaged in the respective belt receptacle 4. In this at least substantially complete state, the toothed belt lock 1 sits, so to speak, on the toothed belt 19, as shown in Fig. 5 is shown.

[0047] The belt mounts 4 are oriented parallel to each other, as shown in the sectional view below right in Fig. 8 is recognizable. In the at least substantially complete manufactured state, the belt mounts 4 are oriented at least substantially vertically to a tangent of the treadmill 14 or the toothed pulley 16. This is particularly evident in conjunction with the Fig. 5 and Fig. 8 is visible in the bottom right corner.

[0048] Furthermore, the toothed belt lock 1 has two deflection sections 7 which connect at least substantially directly to the belt receptacles 4. The deflection sections 7 are formed with a circular arc segment which in this case is at least substantially 180°. Here, the circular arc segment connects to the belt receptacle 4 in the direction of its longitudinal axis. This is, for example, Fig. 2. In this way, the timing belt 19 is guided into or out of the timing belt lock 1, in particular the respective belt receptacle 4, by means of the deflection sections 7. In other words, the deflection sections 7 help to guide the timing belt 19 from its actual path, which is at least substantially segmental in the area of ​​the toothed pulleys 16 and at least substantially straight in the area between the toothed pulleys 16, into or out of the belt receptacles 4. This path of the timing belt 19 is particularly clear when viewed in conjunction with the Fig. 4 above and with Fig. 5 recognizable. In Fig. Figure 5 also clearly shows how the timing belt 19 is guided into and out of the belt receptacles 4 by means of the deflection areas 7. The timing belt 19 contacts the deflection areas 7 with its smooth back side 6.

[0049] The deflection sections 7 each have a raised section 22. These raised sections 22 are, in a sense, the extrema of the respective deflection sections 7 and represent contact points with the timing belt 19. In other words, the deflection sections 7 contact the toothed pulleys 16 at least indirectly, namely with the timing belt 19 resting against the deflection section 7, at the raised sections 22. Here, it is provided that the raised sections 22 have a distance 23 from each other, which corresponds to an integer multiple of a tooth spacing between adjacent teeth of the timing belt 19. In this way, it is ensured that the raised sections 22 of the deflection section 7 always rest at least indirectly on the toothed pulley 16 such that either both raised sections 22 rest on a toothed area or on a toothless area.In other words, it is not possible for one raised section 22 of the deflection area 7 to rest where the timing belt 19 has a tooth and the other raised section 22 to rest where there is no tooth.

[0050] Furthermore, it is provided that the toothed belt lock 1 has a trailer 12 which is located in the Fig. 7 and Fig. 9 is particularly easy to see. The trailer 12 can be attached to each other in the same way as the base body parts 9, 10, namely by screwing the trailer 12 to at least one of the base body parts 9, 10. The trailer 12 offers the possibility of easily attaching further components to it, whereby in this case the support rail 17 is attached to the toothed belt lock 1 by means of the trailer 12, as in Fig. 3 is recognizable. In a particularly preferred manner, the trailer 12 in the example shown is connected to the toothed belt lock 1 by means of the same connecting means 11 that also provide for the connection of the two base body parts 9, 10 of the toothed belt lock 1. The semi-transparent representation in Fig. Nevertheless, Figure 9 shows particularly well the belt receptacle 4 and a contact surface where the base body parts 9, 10 abut each other.

[0051] As in Fig. As shown in Figure 6, a detection means 8 is also provided, by means of which, for example, the position of the toothed belt lock 1 can be determined. The detection means 8 is a photoelectric sensor. The detection means 8 is arranged such that it can determine whether the toothed belt lock 1 is in a position to be checked or not. In this context, the conveyor belt 14 can be driven by the conveyor drive 21, for example, when the detection means 8 does not detect the toothed belt lock 8. Likewise, the conveyor drive 21 is stopped, for example, when the detection means 8 detects the toothed belt lock 8 in the designated position, which in this case is located in the area of ​​the toothed pulley 16 and in Fig.6 is recognizable, has arrived, or is present. Furthermore, it is particularly conceivable that further operation of the heating press can only take place if the toothed belt locks 1 are in a predetermined position, which allows the conclusion that the respective pressing must be in a designated position. This is advantageous at least for a supplementary check regarding the position of the pressing. Reference symbol list 1 Timing belt lock 2 timing belt ends 3 basic shapes 4 belt mounts 5 Front 6 Back 7 deflection areas 8 detection means 9 Basic body part 10 Basic body part 11 Fasteners 12 trailers 13 Funding institution 14 Treadmill 15 Treadmill drive 16 toothed discs 17 Support rail 18 thread section 19 timing belts 20 funding institution 21 Conveyor drive 22 High-rise 23 distance

Claims

[1] Toothed belt lock (1) for power-transmitting connection of two toothed belt ends (2), comprising a base body (3), wherein the base body (3) has two separate belt receptacles (4) for the force-transmitting reception of an end section of a respective toothed belt end (2), wherein the belt receptacles (4) are each formed by a negative profile, which is designed as a negative of an end section of a respective toothed belt end (2) to be received, with a front (5) designed as a negative of a tooth profile of a toothed belt (19) and a back (6) that is flat in itself, designed as a negative of a flat back (6) of a toothed belt (19), such that the end section of the respective toothed belt end (2) can be received in the respective belt receptacle (4) in a form-fitting manner, wherein the belt receptacles (4) are oriented relative to each other such that the front faces (5) of the belt receptacles (4) are facing each other, wherein the base body (3) has two rounded deflection areas (7), each of which is connected to an end cross-section of one of the belt receptacles (4) at which a respective toothed belt end (2) exits the belt receptacle (4), wherein the deflection areas (7) are assigned to the rear sides (6) of the belt receptacles (4) facing away from each other, so that a deflection section of a respective toothed belt end (2), which is directly connected to the end section of the respective toothed belt end (2) received in the respective belt receptacle (4), can with its flat rear side (6) be placed against the respective deflection area (7) and can thus be deflected on the base body (3), characterized by , that the belt receptacles (4) are oriented parallel to each other and spaced apart from each other in the base body (3), wherein the base body (3) is formed of base body parts (9, 10) which can be connected to each other in a force-transmitting manner and which can be separated from each other without damage, wherein the base body (3) is divided along a division plane which is oriented parallel to the longitudinal axes of the belt receptacles (4) and perpendicular to the rear sides (6) of the belt receptacles (4). [2] Timing belt lock (1) according to claim 1, characterized by , that the deflection sections (7) each extend in the form of a circular arc segment over at least 90°, preferably over at least 135°, further preferably over 180°, subsequently along a longitudinal axis of the respective associated belt receptacle (4), so that a respective toothed belt (19) can be deflected by at least 90° in its deflection section following the end section by means of the respective deflection section (7). [3] Timing belt lock (1) according to claim 1 or 2, characterized by, that the deflection areas (7) each connect directly to the belt supports (4) in such a way that a rear side (6) of an end section of a respective toothed belt end (2) can be guided without interruption in the interaction of a respective belt support (4) with a respective deflection area (7) at the transition from the belt support (4) to the deflection area (7). [4] Timing belt lock (1) according to any one of the preceding claims, characterized by , that the dividing plane divides the base body (3) in the middle, so that the base body parts (9, 10) are at least essentially the same size. [5] Timing belt lock (1) according to any one of the preceding claims, characterized by, that the belt receptacles (4) are designed as pocket receptacles in the base body parts (9, 10) so that the removal of the received end sections of the respective toothed belt ends (2) from the base body (3) in the direction of a transverse axis of the toothed belt ends (2) is blocked when the base body parts (9, 10) are in a connected state. [6] Timing belt lock (1) according to any one of the preceding claims, characterized by , that the basic body parts (9, 10) are each formed in one piece. [7] Timing belt lock (1) according to any one of the preceding claims, characterized by a trailer (12) which can be connected to the base body (3) in a force-transmitting manner, preferably to a side surface of the base body (3). [8] Timing belt lock (1) according to any one of the preceding claims, characterized by, that the basic body parts (9, 10) can be connected to each other in a force-transmitting manner by means of at least one connecting means (11) so that together they form the basic body (3), wherein the trailer (12) is connected to the basic body (3) in a force-transmitting manner by means of the same connecting means (11). [9] Set comprising a timing belt lock (1) and two timing belt ends (2) to be connected to each other in a force-transmitting manner, wherein the toothed belt ends (2) each have an end section and a deflection section adjoining it, wherein the toothed belt ends (2) each engage in such a form-fitting manner with belt receptacles (4) of the toothed belt lock (1) that the front faces (5) of the toothed belt ends (2), on which teeth are formed, are facing each other, wherein the deflection sections with flat back sides (6) of the toothed belt ends (2) can be attached to or are attached to the deflection areas (7) of the toothed belt lock (1) adjoining the belt receptacles (4) and are thereby deflected or deflected, characterized by , that the toothed belt lock (1) is designed according to one of the preceding claims. [10] Set according to claim 9 characterized by , that the deflection sections (7) each extend in the form of a circular arc segment over at least 90°, preferably over at least 135°, further preferably over 180°, subsequently along a longitudinal axis of the respective associated belt receptacle (4), so that a respective deflection section can be deflected by means of the respective deflection section (7) by at least 90° relative to a longitudinal axis of the respective associated belt receptacle (4). [11] Set according to claim 9 or 10, characterized by, that the timing belt ends (2) to be joined together are ends of a single timing belt (19) or ends of two timing belts (19) of the same type. [12] Set according to claim 9, characterized by , that the raised (22) deflection sections (7), which correspond to a deflection of the deflection section of the respective toothed belt end (2) of 90° relative to a longitudinal axis of the respective associated belt receptacle (4), are arranged at a distance (23) from each other which corresponds to an integer multiple of a tooth spacing of the toothed belt ends (2). [13] Heating press for the intermittent processing of plate-shaped pressings, comprising - a hydraulic press, - at least one heating plate that can be driven by means of hydraulic presses, - at least one press plate interacting with the heating plate and - at least one conveying device (13) for the intermittent conveyance of pellets into and out of an effective area of ​​the heating plate, wherein the conveying device (13) comprises an endless conveyor belt (14) and a conveyor belt drive (15) suitable for the circulating drive of the conveyor belt (14), characterized by , that the treadmill drive is formed by a toothed belt drive comprising at least one toothed belt (19), two toothed pulleys (16) interacting with the toothed belt (19) and at least one conveyor drive (21) interacting with at least one of the toothed pulleys (16), wherein the toothed belt (19) has at least two toothed belt ends (2) which are connected to each other in a force-transmitting manner by means of a toothed belt lock (1) according to one of the preceding claims. [14] Heating press according to claim 13, characterized bytwo conveyor belt drives (15) formed by toothed belt drives, one of which is assigned to each longitudinal side of the conveyor belt (14), wherein the toothed belts (19) of both toothed belt drives each have at least one toothed belt lock (1), wherein the toothed belt locks (1) are located opposite each other with respect to the conveyor belt (14) at the same position on the respective toothed belt (19), wherein the toothed belt locks (1) each have a trailer (12) and the trailers (12) together support a support bar (17) extending transversely to a conveying direction of the conveying device (13), to which the conveyor belt (14) is attached. [15] Heating press according to claim 13 or 14, characterized bya detection means (8) by means of which a position of a toothed belt lock (1) relative to the toothed pulleys (16) and / or the presence of a toothed belt lock (1) in a predetermined position relative to the toothed pulleys (16) can be detected, wherein the detection means (8) is preferably formed by a light barrier. [16] Method for operating a heating press according to any one of the preceding claims, wherein successive pressed pieces are conveyed by means of a conveying device (13) intermittently into an effective area of ​​a heating plate of the heating press for processing by means of the heating press, pressed by means of the heating plate driven by a press hydraulics and thereby processed and after processing conveyed out of the effective area again, wherein the conveying device (13) comprises at least one conveyor drive (15) formed by a toothed belt drive, wherein the toothed belt drive comprises at least one toothed belt (19), two toothed pulleys (16) interacting with the toothed belt (19) and at least one conveying drive interacting with at least one of the toothed pulleys (16), wherein the toothed belt (19) has at least two toothed belt ends (2) in total, which are connected to each other in a force-transmitting manner by means of a toothed belt lock (1) according to one of the preceding claims, wherein, by means of at least one detection means (8), the position of the toothed belt lock (1) and / or the presence of the toothed belt lock (1) in a predetermined position is detected prior to the processing of a pressing located in the effective area of ​​the heating plate.

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