DE19813868A1 - Transfer platform feed device for concrete block molding machines - Google Patents

Abstract

The device comprises platforms (21) and a carriage (24) which are moved parallel to each other by longitudinal guides (22,25). The carriage guide is adjustable via two pairs of pivot arms (38,39) between a raised active position and a lowered return position. The lower arm ends are hinged to a stationary main frame (43), and the upper arm ends are hinged to the carriage guide. A power drive is aligned with the tangent of the movement path of the carriage guide.

Description

Concrete blocks are produced in this way in a molding machine represents that a transport plate, usually made of wood, in the Forming machine is introduced that the desired concrete stone appropriate form, usually a multiple form, on the Transport plate is lowered that over the mold plate located cavities of the form are filled with concrete that the form together with the transport plate and the filled concrete is shaken until the concrete is still fresh as Concrete block blank has sufficient dimensional stability that the shape of the transport plate and the concrete block raw lingen is lifted and that the transport plate with the Concrete block blanks led out of the molding machine and another station, for example a storage rack, is fed where the concrete sets and the concrete block To a certain extent, harden the blanks into concrete blocks. Such Processes follow one another cyclically. The Transport plates from a loading station, generally mine in the form of a stack magazine, on a longitudinal guide into and out of the molding machine. Ensures the gradual shifting of the transport plates a feed device.

Known feed devices have several drivers click on that at a certain mutual distance are arranged on a common push rod and from these are moved back and forth. The pushing movement will either by means of a double-acting hydraulic Piston drive, by means of a crank drive with a connecting rod or generated by means of a rack and pinion drive.

The driver pawls are right on the push rod at an angle to their longitudinal extent and direction of movement  aligned pivot axis pivotally mounted. They have generally in the form of a two-armed lever, the Form machine facing arm the actual driver pawl forms. The arm turned away has a greater weight moment, so that the driver pawl is always pushed up becomes.

The push rod is below the longitudinal guide level leadership of the transport plates arranged. The drivers pawls are arranged on the push rod and so out forms that they in their swiveled up position, the Driver position, above the management level of transport protrude plates and thus into the trajectory of the Trans protrude port plates. When the The push rod places the front face of the driver pawls at the rear edge of the nearest transport plate and takes it forward. With a return upward movement of the push rod hits the top of the Driver pawls on the front edge of the next one Transport plate and is pressed down by this and finally slides on the underside of this transport plate along until they have been moved past the rear edge is. Then it swings back into its driving position high.

So that the driver pawls can swing up reliably, they need to be a certain amount beyond the rear edge of the Transport plate are moved out, including the non avoidable tolerances of the length dimension of the transport plates must be taken into account. As a result of the swivel movement the driver pawl moves its front face further away from the rear edge of the transport plate. At the reversal point of the push rod there is therefore between the front end of each driver pawl and the rear edge of the closest Trans port plate a relatively large distance.  

The known feed devices with driver pawls and with a crank drive have several disadvantages. One is that that only a certain time after the beginning of the Rotational movement of the crankshaft the face of the driver click on the back edge of the nearest transport plate hits and the driver pawls already one have reached a certain feed rate. That solves an acceleration jump in the transport plates. The transport plate in the molding machine can this jump in acceleration have the consequence that the straight from molded concrete block blanks under the effect of Inertia are deformed in themselves and therefore useless cash or that they are even destroyed. If this Disadvantage should be avoided, only the speed of the Drive motor of the crank mechanism can be reduced. The leads to a corresponding extension of transportation times and thus an extension of the cycle times of the Molding machine and to reduce its manufacturing capacity.

Another disadvantage of the crank mechanism is that of it the feed rod generates the feed speed and the associated course of the feed force. The Speed is almost in the middle of the feed path the biggest. When in the molding machine or at their addition facilities, e.g. B. in the longitudinal guidance of the transport plates, a malfunction occurs and the feed device must be stopped, the feed rod must be from a relatively high speed out on a short distance be stopped. If the resulting delays force greater than the frictional force of the transport plates is in the longitudinal guide, the transport plates move a more or less large path relative to the push rod keep going. This allows the driver pawls on the Bottom of the subsequent transport plate arrive so that when restarting the feed device After eliminating the fault, the driver pawls on the  Scrape the underside of the transport plates along with the Can damage transport plates before they are free again lie and then with the feed rate that has now been reached speed on the rear edge of the original ver pushed transport plate and with these one trigger a considerable jump in acceleration. At the still transport plate partly in the molding machine can in turn lead to this acceleration jump, that the just formed concrete block blanks under the Effect of inertia are deformed and thereby becoming unusable or even being destroyed.

Another disadvantage of the feed device with crank is driven that when the feed device through some stop signal about half of its feed path is stopped, later restarting is not possible is when the load at the given crank position moment of all moving parts greater than the moment of force of the Motors is. If the restart succeeds, it will Feed rod to the one corresponding to this crank position accelerates relatively high feed rate, so that those on the one transport plate Concrete block blanks the effect of inertia so great can be deformed or even destroyed.

With a feed device with a hydraulic Piston drive occurs partly similar and partly different Disadvantages.

The jump in acceleration when the driver hits click on the back edge of the nearest transport flattening also occurs here. This also applies to the case that if the feed device stops suddenly after a relatively high feed rate the transport plates under the effect of inertia can continue to slide and thereby move away from the Remove the driver pawls more or less. At the  Starting again then accelerates again jump, which adversely affects the concrete block Blanks can impact.

Just have feed devices with a rack and pinion drive if the disadvantage that their driver pawls only after a certain distance with the feed then given speed on the rear edge of the transport plate and the transport plates and the ones on them dormant concrete block blanks one for this threatening Can trigger acceleration jump.

The rack and pinion drive has the disadvantage that it does not is free of play. This can happen, especially if it is dirty Guideway of the transport plates, a repeated so-called called Stik-Slip trigger, which leads to a restless run of the Transport plates leads.

The invention has for its object a feed device for transport plates, in particular of To create concrete block molding machines that are free of play and without Acceleration jumps works. This task is accomplished by a feed device with the in claim 1, in Claim 5 or features specified in claim 13 solved.

Characterized in that in a feed device according to claim 1 the carriage with the drivers after completion of a feed movement by means of the swivel arms on an arc shaped path of movement away from the transport plates and after a return movement by one plate distance on the same circular arc the transport plates are brought in, the drivers lay without space, d. H. free of play, at the rear end of the Transport plates. At the start of the feed movement the transport plates taken from the start. A Acceleration jump, as with feed devices Driver pawl is inevitable, does not occur here.  

The same also applies to a feed device after Claim 5, because here the driver from the rear edge of the Transport plates lowered away and after returning around a plate gap and then be raised again again immediately behind the rear edge of the transport plates stand.

Characterized in that in a feed device according to claim 13 the drivers on a rotatably mounted driver shaft are arranged and in a normal to the feed direction aligned pivot plane will be level if there is a play-free attachment of the drivers at the rear edge reached the transport plates, so that here otherwise the otherwise avoidable jump in acceleration at the start of the feed movement does not occur.

If a feed device according to claim 1 Claim 2 is designed, the power drive is not more in the longitudinal center line of the longitudinal guidance of the carriage but in the side area of the swivel arms arranges. With an additional embodiment according to claim 3 the pivoting movement of the swivel arms on both sides mechanically synchronized with each other, which is a torsional free movement of the longitudinal guidance of the carriage favors.

By an embodiment according to claim 4, the work performance for lifting and lowering the longitudinal guide and the Car significantly reduced. You can practically on the Compensation for friction losses can be limited.

If a feed device according to claim 5 Claim 6 is designed, comes to the pure Hubbewe a horizontally aligned movement component added that even better a play-free application of the driver on the transport plates, as is the case with the  Feed device with swivel arm pairs is the case. This allows tolerances of the mutual distance compensate the driver better.

With an embodiment according to claim 7 is easy and inexpensive to carry out and very robust straight guidance reached.

In an embodiment according to claim 8, the straight line is aligned guides and the power drives with each other. Stay through this the straight guides are spared from lateral forces. Furthermore spindle drives are relatively easy to combine synchronize others so that the longitudinal guide and the carriage can be raised and lowered without twisting.

If the feed devices according to claim 1 or Claim 5 according to claim 9 can be arranged in pairs, they can be made shorter than one Carrier without the uniformity of the transfer of the Feed movement on the transport plates is reduced. By reducing the investment area between the Mit and the transport plates also increases the risk diminishes that especially at the edge of the transport plates adhering dirt particles to an inclination of the Guide transport plates. By designing after Claim 10, the driver can be relatively simple and manufacture cheaply.

In a configuration of the feed devices according to Claim 11 is achieved that the transport plates too then can no longer slide relative to the car, if the carriage due to an accident during a feed movement must be stopped. The drivers then lie still close to the rear edge of the transport plates and can use it again without a jump in acceleration take off when the feed motion of the carriage continues is set.  

In a further development according to claim 12 it is achieved that the stops even with a circular arc Trajectory, as with an oblique straight trajectory when lifting the driver in front of the front edge of the transport plates can be moved without hitting the transport plates. If the inclination angle of the back of the stops opposite the concern the trajectory is more inclined, even tole satchel, especially an oversize, the dimension of the trans port plates in the feed direction, can be easily compensated. The front edge of the transport plates may be located at a point higher up and therefore higher up of the attacks. The oblique position that occurs Transport plate in question is relatively small and during the feed movement of the transport plate without Meaning.

If a feed device according to claim 13 Claim 14 is designed, it is achieved that the Trans port plates with greater security evenly and before all shifted in their guideway without tilting become. Because the two carriers of one carrier couple are pivoted in the opposite direction, the lateral forces are balanced, which with a possible friction between the drivers and the edge of the Transport plate can occur.

An embodiment according to claim 15 enables despite Swiveling movement of the carriers in a normal to the feed directional level a horizontal approximation movement of the driver surface on the transport plates. This allows deviations in both dimensions of the transport plates in the feed direction as well as in the Location of the transport plates relative to the car and the Mit participants, but also deviations in the distance between the carriers balance each other easily. If there is another education according to claim 16 is the section of the driver enlarged area that rests on the transport plates.  

In an embodiment according to claim 17, the Mit can be easily adjusted on the drive shaft and also easily to different dimensions of the Trans port plates can be set.

By an embodiment according to claim 18 is also at a feed device according to claim 13 prevents the transport plates can continue to slide if in one In the event of a malfunction, the feed movement is interrupted. The trans port plates will surely keep their mates position. According to one Training according to claim 19 either simple and cheap positioning stop thumbs are used or stop slices, which are more complex, the but also better entered can be set. With further training after Claim 20 is also the case with simple stop thumbs possible, deviations in the dimensions of the transport plates in Feed direction and / or the clear distance between the Stop thumb and the assigned driver same.

In an embodiment according to claim 21 is compensation of deviations in the dimensions of the transport plates and / or the distance between the driver and the stop in one high dimensions possible. Through continuing education Claim 22 is prevented from occurring more unfavorably Circumstances of a driver and its associated stop the driver position on a transport plate.

By an embodiment according to claim 23, the Stops adjusted very easily on the drive shaft become and also lighter to different dimensions of the transport plates can be set.  

In an embodiment according to claim 24, each stop dodge elastically relative to its driver, so that especially in the driver position jamming on one Transport plate avoided even under unfavorable circumstances becomes. This also allows a torque limit when Rotary drive can be dispensed with. The same is done with a Design according to claim 25 achieved.

In the following the invention is based on several embodiments Examples explained in more detail. Show it:

Fig. 1 is a partially sectioned side view of a first embodiment of the feed device, in two different operating positions of some parts;

Fig. 2 is a plan view of the feed device of Fig. 1;

Fig. 3 is an end view of the feed device of Figure 1, in two different operating positions of some parts.

Fig. 4 shows an enlarged detail of the side view of FIG. 1;

Fig. 5 is a fragmentary side view of a second embodiment of the feed device;

FIG. 6 shows a top view of the feed device according to FIG. 5;

Fig. 7 is a partially sectioned end view of the feed device of Figure 5, in the driving position of some parts.

Fig. 8 is an end view of the feed device of Figure 5 in the return position of some parts.

Fig. 9 and Fig. 10 is a fragmentary side view and plan view of a drive shaft of the feed device of Figure 5 in the driver position.

FIG. 11 and FIG. 12 show a side view and a top view of a modified driver shaft, in the driver position;

FIG. 13 shows a side view, shown in detail, of a further modified driver shaft, in the driver position; FIG.

FIG. 14 is a side view, shown in detail, of a further modified driver shaft, in the driver position; FIG.

Fig. 15 is an end view of the cam shaft of Fig. 14.

The feed device 20 shown in FIG. 1 to FIG. 3 is intended for the gradual displacement of transport plates 21 , which are only dash-dotted (indicated in FIG. 1 and FIG. 3). These transport plates 21 are mostly made of wood and are in particular in concrete block shape used machines, to make it concrete blocks of different lichsten Art. From the molding machine in Fig. 2 and Fig. 3, only portions of a longitudinal guide 22 for the transport plates 21, namely two guide rails 23 with L-shaped cross-section, shown On this longitudinal guide 22 , the transport plates 21 are guided into and out of the molding machine from a feed station (not shown).

The feed device 20 has a carriage 24 which is guided by means of its own longitudinal guide 25 parallel to the longitudinal guide 22 of the transport plates 21 . The longitudinal guide 25 is formed by two guide rails with a U-shaped cross section, the flanges of which face each other. The guide rails 26 are non-detachably connected to each other by cross members 27 , and in general my welded. On the lower flange of the guide rails roll rollers 28 , which are rotatably mounted on a longitudinal spar 29 of the carriage 24 . The longitudinal spars 29 are non-detachably connected to one another by cross members 31 , generally welded. On the front end of the carriage 24 , two fork-like extensions 32 are attached.

The carriage 24 has several pairs of drivers 33 and 34 on its upper side. The drivers 33 are arranged on the carriage 24 in the narrower sense. The drivers 34 are arranged on the extensions 32 . The two drivers 33 or 34 of a pair of drivers are arranged on a common position line which is oriented normally to the feed movement of the carriage 24 . The drivers 33 and 34 and thus also their position lines have a distance from one another which is greater than the dimension of the transport plates 21 in the feed direction. Since the transport plates 21 generally have a square outline, so that they can be used in any orientation, the dimension of the transport plates 21 in the feed direction equal to their side length.

The carriage 24 also has several pairs of stops 35 and 36 on its upper side. The stops 35 are in turn arranged on the carriage 24 in the narrower sense. The stops 36 are arranged on the two extensions 32 . The stops 35 and 36 of a pair of stops are in turn arranged on a common position line, which is aligned normal to the direction of advance of the carriage. A pair of stops 35 or 36 is assigned to a pair of drivers 33 or 34 with which it cooperates in order to hold a transport plate 21 resting on the longitudinal guide 22 with as little play as possible during a feed movement, as indicated in FIG. 1. The formation and mutual assignment of the drivers 33 and 34 and the stops 35 and 36 assigned to them will be explained in more detail later with reference to FIG. 4. Arranged at the free end of the extensions 32 of the carriage 24 pair of drivers 34 no stops are assigned because they have to push the transport plates 21 out of the molding machine onto another conveyor.

For moving the transport plates 21 on the longitudinal guide 22 , the drivers 33 and 34 and the stops 35 and 36 are raised so far that they protrude into the path of movement of the transport plate resting on the longitudinal guide 22 and they are at the rear or at the front Place or couple the edge of the transport plates 21 . The carriage 24 is moved by a feed drive 37 by one position. This drive 37 is designed as a friction wheel drive. Subsequently, the driver and the stops back plates of the transport 21 decoupled by being lowered so far that they are below the movement path of the transport plates 21, as shown in Fig. 1 and Fig. 3 is shown in the right area.

For coupling and uncoupling the drivers 33 and 34 and the stops 35 and 36 to or from the transport plates 21 , the longitudinal guide 25 of the carriage 24 is guided by means of two swivel arm pairs 38 and 39 parallel to themselves on a circular arc-shaped movement path. The pivot arms 38 and 39 are aligned parallel to each other. The swivel arms 38 of a pair are arranged in the region of the rear end of the longitudinal guide 25 on the left in FIG. 1. The two swivel arms 39 of the other pair are arranged in the region of the front end of the longitudinal guide 25 . The swivel arms 38 and 39 are each arranged in the plan area of one of the guide rails 26 of the longitudinal guide 25 . At their upper end they are articulated by means of a fork joint 41 with the longitudinal guide 25 . Approximately in the middle of their longitudinal extent, the swivel arms 38 and 39 are articulated by means of a second fork joint 42 to a fixed base frame 43 , each with a cross member 44 of the base frame 43 .

The two swivel arms 38 or 39 of a pair of swivel arms are permanently connected to one another by means of a torsionally rigid connecting pipe 45 , which is preferably arranged in the line of rotation of the axis of rotation of the fork joints 42 .

As is apparent from Fig. 1 and Fig. 3, the pivot arms 38 and 39 have a over the lower fork joint 42 also extending projection 46, at whose free end a respective counterweight 47 is disposed. The counterweights 47 are designed and arranged so that the sum of their weight moments is at least approximately equal to the load moment of the carriage 24 and its longitudinal guide 25 .

For swiveling up and swiveling down the longitudinal guide 25 and the carriage 24 , a power drive 48 is provided, which is formed by two piston drives 49 , one of which is articulated to one of the swivel arms 39 of a swivel arm pair and the other to the base frame 43 is articulated. The force direction of the piston drives 49 is at least approximately parallel to a tangent to the path of movement of the pivot arms 39 aligned.

The swivel arms 38 and 39 are arranged so that the arcuate trajectory of the longitudinal guide 25 and the carriage 24 which is symbolized in FIG. 4 by the dashed line 51 is shown symbolically in the swivel area of the swivel arms 38 and 39 both a vertical as also has a horizontal component. The drivers 33 and 34 and the stops 35 and 36 have an arcuate movement path 52 parallel to them. The strip-shaped drivers 33 and 34 , which are aligned perpendicularly, are raised parallel to themselves on this movement path 52 into the movement path of the transport plates 21 and at the same time are placed horizontally on the rear edge 53 of the transport plates 21 . The stops 35 and 36 are also designed as short strips. Your position line 54 , which is determined by the plan projection of the front edge of the transport plates 21 , has a distance from the position line 55 of the drivers 33 and 34 , which is at least equal to the dimension of the transport plates 21 in the feed direction. The stops 35 and 36 have an inclination relative to the vertical in the direction of advance, ie away from the drivers 33 and 34 , which is at least approximately equal to the tangent to the movement path 52 of their upper edge 56 within the range of movement of this edge.

An embodiment of the feed device, not shown, which acts on the same basic principle as the feed device 20 , has instead of swivel arms a number of straight guides for the longitudinal guidance of the carriage, which can be designed, for example, as sliding guides. These straight guides are attached to the base of the feed device at the lower end. Its upper end is connected to the longitudinal spar of the longitudinal guide of the carriage. These straight guides are inclined from the base frame in the feed direction, so that the straight path of the longitudinal guide and the carriage generated by them also has both a vertical and a horizontal component, as was explained in the device 20 at the feed device. Hydraulic piston drives can again be used as the power drive for lifting and lowering the longitudinal guide and the carriage. Spindle drives can also be considered as power drives. As far as the straight guides are cylindrical, the power drives are expediently arranged in the center of the straight guides. If the straight guides are formed as hollow cylinders, the power drives can also be accommodated within the linear guides. The drives of the spindle drives are advantageously synchronized with one another either mechanically or electrically.

From FIG. 5 to FIG. 8, a feed device can be seen from example 60 section. The transport plates 21 are also slidably guided by a longitudinal guide 22 . Insofar as individual parts or assemblies are not explained separately below, it can be assumed that they are the same or similar to the corresponding parts or assemblies of the feed device 20 .

In the feed device 60 , the better clarity of the illustration because of the longitudinal guidance of the carriage 61, not shown, is arranged in a stationary manner. On the carriage 61 , two driver shafts 62 and 63 are rotatably supported by means of two bearings 64 and 65 , of which one bearing 64 only has to absorb radial forces and the other bearing 65 has radial and axial forces. The driver shafts 62 and 63 protrude in the feed direction beyond the carriage 61 , as was the case with the extensions 32 on the carriage 24 of the feed device 20 .

Driver 66 and stops 67 are arranged on the two driver shafts 62 and 63 . The arrangement of these parts on certain position lines corresponds to the arrangement of the participants 33 and 34 and the stops 35 and 36 of the feed device 20th

The carrier 66, the stops designed as stop rings 69 as drive disks 67 and 68, both of which have an annular elevation (Fig. 7 and Fig. 8). As a circular ring section, its outer peripheral edge 71 and its inner peripheral edge 72 have a peripheral angle of 180 °. Accordingly, its two side edges 73 and 74 are aligned diametrically. In the return position of the slave shafts 62 and 63 , the two side edges 73 and 74 are aligned horizontally ( Fig. 8). From this rotational position, the drive shafts 62 and 63 are rotated accordingly to the arrow 75 or corresponding to the arrow 76 in the opposite direction of rotation by 270 ° into the drive position shown in FIG. 7, namely the left drive shaft 63 clockwise and the right located drive shaft 62 in the counterclockwise direction. As a result, the drive plates 66 and the stop plates 67 run ahead of the left side edge 73 in FIG. 8 and the right side edge 74 runs on. In the clutch shaft 62 connected to the cam discs 66 and stop washers 67 runs in Fig. 8 according to the right side edge 73 located ahead of the left and the preferred side rim 74.

The facing in the direction of the end face of the driver discs 68 , serves as a driver surface 77 ( Fig. 5 and Fig. 6), the plates 21 puts on the rear edge of the transport. The adjoining the driver shaft 62 or 63 inner peripheral edge 52 of the driver surface 77 is located in a normal to the longitudinal axis of the driver shaft aligned cross-sectional plane. The driving surface 77 is spatially curved in the manner, and that its outer peripheral edge 71 from the trailing side edge 74 with a pivoting movement into the driving position from up to the leading side edge 73 away from the cross-sectional plane of the inner peripheral edge 72 against the feed direction. As a result, the leading side edge 73 is inclined to the rear. This has the consequence that the leading side edge 73 has a corresponding distance from the rear edge of the transport plates 21 during a rotary movement from the return position ( FIG. 8) into the driving position ( FIG. 7). This distance the follower surface 77 is reduced to the trailing side edge 74 back to zero, so that then a direct contact of the cam surface 77 in port plates at the rear edge of the transformants is given 21st

Expediently, the spatial curvature of the driving surface 77 extends only over a circumferential angle of less than 180 °, so that the end portion of the driving surface 77 adjoining the side edge 74 forms a flat surface which is flush with the cross-sectional plane of the inner peripheral edge 72 . Then the driving surface 77 rests with a larger surface section on the transport plates 21 .

The the associated carrier 66 facing end face of the stop plate 69 serves as a stop surface 78 (FIG. 5 and FIG. 6). It has the same inclination over the entire circumference with respect to the perpendicular or with respect to the longitudinal axis of the driver shafts 62 and 63 . Therefore, it forms a truncated cone surface. If the dimensions of a transport plate 21 are excessive in the feed direction, its front edge can move on the stop surface 78 by a corresponding amount toward the larger diameter.

The driver disks 68 and the stop disks 69 are not arranged directly on the driver shafts 62 and 63 . They are permanently connected to a hub 79 , which is pushed onto the drive shafts 62 and 63 . The hub 79 is clamped by means of a clamping device, for example in the form of a clamping screw 80 , on the driver shaft 62 or 63 ( Fig. 9 and Fig. 10).

The driver shafts 62 and 63 are coupled via a distributor gear 81 in the opposite direction of rotation with a reversing rotary drive 82 , which is formed by an electric motor 83 . The electric motor 83 is attached to a bearing plate 84 , which in turn is releasably connected to the rear cross member 85 of the car 61 .

The transfer case 81 has two gearwheels 86 and 87 , of which the gearwheel 86 on the right in FIG. 7, as the primary drive means of the transfer case 81, is non-rotatably coupled to the stub shaft of the electric motor 83 . The reverse gear 87 , which meshes with the gear 86 , is rotatably mounted as a secondary drive means of the transfer case 81 on a bearing block, which is detachably connected to the bearing plate 84 .

The primary gear 86 is non-rotatably coupled to a toothed belt pulley 88 . The secondary gear 87 is coupled to a toothed belt pulley 89 in a rotationally fixed manner. The toothed belt pulley 88 interacts with a toothed belt 91 and the toothed belt pulley 89 together with a toothed belt 92 . The toothed belt 91 drives a toothed belt pulley 93 , which is coupled to the drive shaft 62 in a rotationally fixed manner. The toothed belt 92 drives a toothed belt pulley 94 which is rotatably coupled to the driver shaft 63 .

The transfer case 81 is abge of a cover 85 covers, shown in phantom in Fig. 5, Fig. 6 and Fig. 7. It bears against the end shield 84 and is connected to it in a removable manner.

From Fig. 11 and Fig. 12 a modified embodiment form of the drive plates and the stop washers can be seen.

The driving disks 96 have a driving surface 97 which is designed as a helical surface. Both the outer peripheral edge 98 and the inner peripheral edge 99 of the driver disk 96 has a helical or helical course. Both its leading side edge 101 and its trailing side edge 102 are aligned radially.

The stop disk 103 is a mirror image of the driver disk 96 is formed. Its stop surface 104 is also designed as a helical surface like the driver surface 97 .

Also in the drive plates 96 and the stop discs 103 , it is expedient that the helical surface does not extend over the entire circumferential area, but that its end section adjoining the trailing side edge 102 is designed as a flat surface which is oriented normally to the longitudinal extension of the drive shaft 62 .

The drive plate 96 and the stop plate 103 are in turn inseparably connected to a hub 105 which is clamped to the drive shaft 62 by means of a clamping screw 106 .

Since both the driving surface 97 and the stop surface 104 have the generating surface line directed radially out, a transport plate 21 cannot switch to an inclined surface if its dimension in the direction of advance is greater than the clear distance between the driving surface 97 and the stop surface 104 is. In order also in this case clamping of the drive disk 96 and to prevent the with it cooperating stop washer 103, it is expedient to equip the rotary drive 82 for the carrier shafts 62 and 63 having a torque limiter, which in the direction of rotation for pivoting the carrier and stops in the Driving position becomes effective. In the opposite direction of rotation, ie when pivoting the driver and stops in the return position, the torque of the rotary drive should be greater than the limit torque in the other direction of rotation so that the driver and stops are reliably released from the trans port plates 21 .

This torque limitation of the rotary drive can be omitted if a modified stop disk 107 is used instead of the rigidly arranged stop disk 103 ( FIG. 13).

This stop disk 107 is permanently connected to a sliding sleeve 108 , which in turn is displaceably guided in the axial direction on a modified hub 109 , the sliding sleeve 108 being secured against rotation relative to the hub 109 . The hub 109 is clamped to the drive shaft 62 or 63 by means of a clamping screw 110 . The clamping screw 110 is countersunk in the hub 109 so that the sliding sleeve 108 can be moved over it.

The sliding sleeve 108 has an internal width that is larger than the outer diameter of the hub 109 . A return spring in the form of a helical compression spring 111 is arranged in the annular space. It is supported on the one hand on an inner collar 112 of the sliding sleeve 108 and on the other hand on an outer collar 113 of the hub 109 , so that it exerts a force on the sliding sleeve in the direction of the associated drive plate 96 .

Between the sliding sleeve 108 and the hub 109 there is a path limitation 114 which is formed, for example, by a locking ring 115 which is inserted into a circumferential groove of the inner surface of the sliding sleeve 108 and which bears against the outer collar 113 of the hub 109 in an axial position, in which the stop surface 116 of the stop disc 107 from the driver surface 97 of the driver disc 96 has a clear distance which is at least approximately the same as the dimension of the transport plates 21 in the feed direction.

An axially yielding stop can also be created in that the stop disc is arranged on a holder which is connected to the associated hub body, for example by means of a rubber-elastic intermediate member which is essentially only flexible in the axial direction, but not in the circumferential direction. From Fig. 14 and Fig. 15, a simpler embodiment of a taker 121 and a stop 122 can be seen.

The driver 121 is designed as a driver thumb 123 and the stop 122 is designed as a stop thumb 124 . Both are made from a steel bar section that is permanently connected to a hub 125 . This hub 125 is clamped to the drive shaft 62 or 63 by means of a clamping screw 126 . The stop thumb 124 is inclined in the feed direction from the hub 125 , as is the case with the stops 35 and 36 of the feed device 20 . In addition, the driver thumb 123 as well as the stop thumb 124 can be twisted in itself, so that a ramp surface is formed in the circumferential direction in a manner similar to the driver disk 96 or the stop disk 103 and an approach movement of the driver surface and / or the stop surface on the transport plates 21 is possible is.

Reference list

20th

Feed device

21

Transport plates

22

Longitudinal guidance

23

Guide rails

24th

dare

25th

Longitudinal guidance

26

Guide rails

27

Cross member

28

Casters

29

Longitudinal spars

31

Cross member

32

Extensions

33

Carrier

34

Carrier

35

attacks

36

attacks

37

Feed drive

38

Swivel arms

39

Swivel arms

41

Fork joint

42

Fork joint

43

Base frame

44

Cross member

45

Connecting pipe

46

Continuation

47

Counterweight

48

Power drive

49

Piston drives

51

Trajectory

52

Trajectory

53

edge

54

Position line

55

Position line

56

Edge

60

Feed device

61

dare

62

Drive shaft

63

Drive shaft

64

camp

65

camp

66

Carrier

67

attacks

68

Driving disks

69

Stop washers

71

outer peripheral edge

72

inner peripheral edge

73

leading margin

74

trailing margin

75

arrow

76

arrow

77

Driver area

78

Abutment surface

80

Clamping screw

81

Transfer case

82

Rotary drive

83

Electric motor

84

End shield

85

Cross member

86

Gears

87

Gears

88

Timing belt pulley

89

Timing belt pulley

91

Timing strap

92

Timing belt

93

Timing pulley

94

Timing belt pulley

95

Cover

96

Drive plate

97

Driver area

98

outer peripheral edge

99

inner peripheral edge

101

leading margin

102

trailing margin

103

Stop disc

104

Abutment surface

105

hub

106

Clamping screw

107

Stop disc

108

Sliding sleeve

109

hub

110

Clamping screw

111

Helical compression spring

112

Inner waistband

113

Outer waistband

114

Path limitation

115

Circlip

116

Abutment surface

121

Carrier

122

attack

123

Takeaway thumb

124

Stroke thumb

125

hub

Claims (25)

1. Feed device for transport plates, in particular for concrete block molding machines, with the features:

• - There is a longitudinal guide ( 22 ) for the transport plates ( 21 ),
  • - by means of which the transport plates ( 21 ) can be guided into and out of the molding machine from a feed station on the molding machine,
• - There is a carriage ( 24 ) which is guided by means of its own longitudinal guide ( 25 ) parallel to the longitudinal guide ( 22 ) of the transport plates ( 21 ) and movable
  • - Which can be moved back and forth by means of a reversible drive ( 37 ),
• - The carriage ( 24 ) has on its top with several participants ( 35 ; 36 ),
  • - Which have a distance from each other that is larger than the dimension of the transport plates ( 21 ) in the direction of movement and
  • - before the beginning of an advance movement in the BEWE the transport plates supply path (21) are movable into and after completion of the advance movement are moved out of the feed direction of the transport plates (21),
  characterized by the characteristics:
• - The longitudinal guide ( 25 ) of the carriage ( 24 ) is adjustable by means of two pairs of swivel arms ( 38 ; 39 ) parallel to itself between a raised driver position and a lowered return position,
  • - The swivel arms ( 38 ; 39 ) are
  • - At their lower end with a fixed base frame ( 43 ) are articulated and
  • - articulated at its upper end to the longitudinal guide ( 25 ) of the carriage ( 24 ),
• - There is a power drive ( 48 ),
  • - The one hand with the base frame ( 43 ) and on the other hand with the longitudinal guide ( 25 ) of the carriage ( 24 ) is articulated and
  • - The direction of force has at least one component that is aligned with a tangent to the trajectory of the longitudinal guide ( 25 ).

2. Feed device according to claim 1, with the further feature:

• - There are two power drives ( 48 ),
  • - which are coordinated,
  • - Each of which interacts with one of the swivel arms ( 39 ) of a swivel arm pair.

3. Feed device according to claim 1, with the further feature:

• - The swivel arms ( 38 ; 39 ) of a pair of swivel arms are connected to one another by means of a torsionally rigid connecting part ( 45 ).

4. Feed device according to claim 1, with the further features:

• - At least part of the swivel arms ( 38 ; 39 ) has an extension ( 46 ) extending from the articulated connection point ( 42 ) to the base frame ( 43 ),
  • - which is either designed as a counterweight or
  • - on which a counterweight ( 47 ) is arranged,
• - Preferably, the moment of gravity of all existing counterweights ( 47 ) is at least approximately equal to the load moment of the carriage ( 24 ) and its longitudinal guide ( 25 ).

5. Feed device for transport plates, in particular concrete block molding machines, according to the preamble of claim 1, characterized by the features:

• the longitudinal guidance of the carriage is guided parallel to itself by means of at least three straight guides between a raised driver position and a lowered return position,
• - there are at least three power drives,
  • - which are coordinated,
  • - which are supported at their lower end on the base frame and
  • - Which rest at their upper end on the longitudinal guide of the carriage or are detachably or non-detachably connected to it.

6. Feed device according to claim 5, with the further feature:

• - The straight guides of the longitudinal guide of the carriage are inclined in the feed direction from the base frame.

7. Feed device according to claim 5, with the further feature:

• - The straight guides of the longitudinal guide of the carriage are designed as cylindrical sliding guides.

8. Feed device according to claim 5, with the further features:

• - The power drives are designed as spindle drives, the drives of which are coordinated with one another according to the speed and rotational travel,
• - The spindle drives are preferably arranged centrally to the straight guides.

9. Feed device according to claim 1 or 5, with the further features:

• - The drivers ( 33 ; 34 ) are available in pairs,
• - The two drivers ( 33 ; 34 ) of a pair of drivers are arranged symmetrically to the longitudinal center line of the carriage ( 24 ) on a common position line ( 55 ) which is normal to the direction of movement of the carriage ( 24 ).

10. Feed device according to claim 1 or 5, with the further feature:

• - The drivers ( 33 ; 34 ) are formed out as short strips which are detachably or permanently connected to the top of the carriage ( 24 ).

11. Feed device according to claim 1 or 5, with the further feature:

• - there are stops ( 35 ; 36 ),
  • - Which are arranged individually or in pairs on a position line ( 54 ), the device in the feed direction of the carriage ( 24 ) from the position line ( 55 ) of the associated driver ( 33 ; 34 ) have a clear distance which is at least approximately equal to the dimension the transport plates ( 21 ) is in the feed direction.

12. Feed device according to claim 11, with the further features:

• - The stops ( 35 ; 36 ) are formed out as short strips,
• - The back side of the stops ( 35 ; 36 ), which is aligned against the feed direction, is inclined with respect to the vertical in the feed direction,
• the angle of inclination of the rear of the stops ( 35 ; 36 ) relative to the vertical is preferably greater than the angle,
  • - The between the vertical and the tangent of the movement path of the stops ( 35 ; 36 ) generated by the swivel arms ( 38 ; 39 ) in the height range of the movement path of the transport plates ( 21 ) is given,
  • - or between the vertical and the direction of movement of the straight line.

13. Feed device according to the preamble of claim 1, characterized by the features:

• - The longitudinal guide of the carriage ( 61 ) is arranged stationary,
• - The drivers ( 66 ; 121 ) are designed as driver thumbs ( 123 ) or as driver disks ( 68 ) and arranged on a common driver shaft ( 62 ; 63 ),
  • - which is aligned parallel to the feed direction of the carriage ( 61 ),
  • - Which is rotatably mounted on the carriage ( 61 ) and
  • - Which is coupled with a reversing rotary drive ( 82 ), by means of which the participants ( 66 ; 121 ) swiveled between a position in the path of movement of the transport plates ( 21 ) and a position swung down under the path of movement of the transport plates ( 21 ) in the return position .

14. Feed device according to claim 13, with the further features:

• - there are two driver shafts ( 62 ; 63 ),
  • - which are aligned parallel to each other,
  • - On both of which one of the drivers ( 66 ) is arranged on the same position line, which is aligned normal to the feed direction of the carriage ( 61 ) and
  • - Which are coupled in the opposite direction of rotation with a revering rotary drive ( 82 ).

15. Feed device according to claim 13, with the further features:

• - The driving plates ( 66 ; 96 ) have a driving surface ( 77 ; 97 ) pointing in the feed direction,
  • - whose end view represents a circular sector with a sector angle of less than 180 ° or a circular ring section whose circumferential angle is 180 ° or greater,
• - either the driving surface is designed as a helical surface,
  • - whose trailing side edge ( 102 ) is located at least approximately in the normal plane to the driver shaft which is aligned with the position line of the driver, and
  • - whose side edge ( 101 ) leading in the case of a pivoting movement into the driver position is located in an axial region which is at a distance from the position line of the driver ( 96 ) against the feed direction,
• - Or the driver surface ( 77 ) is spatially curved in the manner
  • - That its inner peripheral edge ( 72 ) adjoining the driver shaft is located in a cross-sectional plane normal to the longitudinal axis of the driver shaft ( 62 ; 63 ) and
  • - That its outer circumferential edge ( 71 ) from the run with a pivoting movement in the driving position, the side edge ( 74 ) up to the leading side edge ( 71 ) from the cross-sectional plane of the inner circumferential edge ( 72 ) against the direction of advance.

16. Feed device according to claim 15, with the further feature:

• - In the circumferential direction at the end section of the driver surface ( 77 ; 97 ) is formed out as a flat surface which is aligned normal to the longitudinal axis of the driver shaft ( 62 ).

17. Feed device according to claim 13, with the further features:

• - Each driver ( 66 ; 96 ) is arranged on a hub ( 79 ; 105 ),
• - Each hub ( 79 ; 105 ) by means of a Klemmvor direction ( 80 ; 106 ) on the drive shaft ( 62 ) can be firmly clamped.

18. Feed device according to claim 13, with the further features:

• - on each driver shaft ( 62 ; 63 ) there are stops ( 67 ),
• - Each stop ( 67 ) is assigned to a driver ( 66 ),
  • - From which it has a clear distance in the feed direction, which is at least approximately equal to the dimension of the transport plates ( 21 ) in the feed direction, and
  • - With which it is in the path of movement of the trans port plates ( 21 ) in and out,
  • - The stops ( 67 ) are arranged in the same circumferential area as the drivers ( 66 ).

19. Feed device according to claim 18, with the further feature:

• - The stops ( 122 ) are designed as stop thumbs ( 124 ) or as stop discs ( 69 ; 103 ).

20. Feed device according to claim 19, with the further feature:

• - The back side of the stop thumb ( 124 ), which is aligned against the feed direction, is inclined away from the inner circumferential edge adjoining the driving shaft ( 62 ) towards the outer circumferential edge away from the associated driving element ( 121 ).

21. Feed device according to claim 19, with the further features:

• - The stop discs ( 103 ) have a stop surface ( 104 ) pointing counter to the feed direction,
  • - whose end view represents a circular sector with a sector angle of less than 180 ° or a circular ring section whose circumferential angle is 180 ° or greater,
• - The stop surface ( 104 ) is formed corresponding to the driving surface ( 97 ) of the drive plates ( 96 ), the curvature course being opposite to that of the drive plates ( 96 ).

22. Feed device according to claim 21,

• - The rotary drive ( 82 ) has in the direction of rotation for pivoting the driver ( 96 ) and the stops ( 103 ) in the movement path of the transport plates ( 21 ) due to its design, due to a corresponding control of the energy supply or due to an additional device, a limited torque ,
• - The rotary drive ( 82 ) has a higher torque in the reverse direction.

23. Feed device according to claim 18, with the further features:

• - Each stop ( 67 ; 103 ; 122 ) is arranged on a hub ( 79 ; 105 ; 126 ),
• - Each hub ( 79 ; 105 ; 126 ) can be clamped by means of a clamping device ( 80 ; 106 ; 125 ) on the drive shaft ( 62 ).

24. Feed device according to claim 18, with the further features:

• - each stop ( 107 ) is arranged on a sliding sleeve ( 108 ),
• - The sliding sleeve ( 108 ) is guided on a hub body ( 109 ) slidably in the axial direction and rotatable in the circumferential direction.
• - The hub body ( 109 ) can be connected to the drive shaft by means of a fastening device or can be clamped to the drive shaft ( 62 ) by means of a clamping device ( 110 ),
• - there is a return spring ( 111 ),
  • - Which is supported on the one hand on the sliding sleeve ( 108 ) and on the other hand on the hub body ( 109 ) and
  • - by means of which a force can be exerted on the sliding sleeve ( 108 ) in the direction of the associated driver ( 96 ),
• a path limitation ( 114 ) is preferably present on the hub body ( 109 ),
  • - On which the sliding sleeve ( 108 ) rests in an axial position in which the stop ( 107 ) from the associated driver ( 96 ) has a clear distance which is at most equal to the dimension of the trans port plates ( 21 ) in the feed direction.

25. Feed device according to claim 18, with the further features:

• - each stop is arranged on a holder,
• the holder is flexibly connected to a hub body in the axial direction and largely non-rotatably in the circumferential direction,
• - The hub body can be connected to the drive shaft by means of a fastening device or clamped to the drive shaft by means of a clamping device.