EP0824174B1 - Method and arrangement for applying mortar to the underside of a building-stone - Google Patents

Abstract

The mixer (70) comprises a barrel-shaped container (72) with a top filler opening (73) and a discharge opening (76) in the bottom (74). The discharge opening is closed by a shut-off element (77) that can be opened to remove mortar. A stirrer system (81,83) driven by a drive mechanism comprises a stirrer shaft (81) mounted above the top of the container on one side. The shaft extends vertically as far as the bottom of the container and carries a stirring paddle arrangement (83) on its lower end. The output shaft of the electric drive mechanism can be connected, by a drive belt, to a pulley (87) mounted on the top end of the stirrer shaft

Description

The invention relates to a method for applying mortar to the underside a brick to be bricked according to the preamble of claim 1 and an apparatus for performing this method.

When laying walls, it is still common to use the mortar, especially for the bed joints applied by hand to the top of the masonry that has already been erected and then place the next block of modules on the prepared mortar bed. This also applies if, for example, so-called aerated concrete Plan stones with the help of thin-bed mortar, which is often also called "adhesive" is referred to.

This usually precedes the placement of the next module layer Applying and distributing the mortar or thin-bed mortar requires a high level of experience and skill to face a whole range of difficulties to overcome.

For example, a relatively precisely metered amount of mortar must be applied to the Masonry top applied and with very good uniformity over one Section will be distributed, the length of which largely depends on the instant prevailing conditions. E.g. relatively low-water mortar distributed too long a piece of wall that is currently strong sunlight is exposed during the time that the subsequent touchdown of the Block placement requires in the section in which the last blocks are placed should be, the mortar has already dried so far that a proper Binding effect is no longer guaranteed and the old material scraped off and must be replaced with fresh mortar. The same applies when processing mortar at temperatures below 0 ° C, at which a too long time between the application of the mortar and the application of one Building block to freeze the mortar.

The layer of mortar initially applied is also weighted Building block and to achieve a uniform thickness of the bed joint Pressing force to be exerted pressed apart in the horizontal direction. Has been too much mortar applied, this leads to the fact that the mortar mass from the bed joints oozes out and runs down the wall surfaces, which is an afterthought Cleaning required. Too little mortar has been applied complete coverage of the stone surfaces and proper adhesive effect not guaranteed.

Do the bricks to be bricked have no closed top or are uneven joints or pockets on their abutting surfaces should enable gripping the module with the help of recessed grips when applying mortar manually, a relatively large amount of material in these vertical columns so that mortar consumption is unnecessarily large if not is worked with great care. The latter is also for a practiced wall associated with an increased expenditure of time.

In order to reduce these difficulties, particularly with regard to mortar consumption, a method for applying mortar to building blocks has therefore already been proposed (DE-OS 42 26 795), in which the brick with its in the masonry the bottom forming surface is placed on a so-called dosing grid and together with this against the surface of the provided in a tub Mortar supply is pressed. Mortar mass passes through the open mesh of the dosing grid and sticks to the bottom of the block. The dosing grid should ensure that the mortar layer adhering to the block has an approximately uniform thickness, which is then when the building block on the already completed masonry is put on, thereby further evened out, that the mortar mass in the because of the shielding effect of the bars of the metering grid initially not covered with mortar Distributed underside of the block.

Since in this known method the amount of the bottom of the block adhesive mortar very strongly both from the surface texture of the block as well as the consistency of the mortar, and these parameters depend on The actual resulting mortar layer thickness depends on the case still largely from the skill of this known Device operating operator and in particular the force from the dosing grid with the brick placed against the surface of the mortar suppressed. This pressure force cannot be applied to a given situation be adjusted by one-time setting, but must be used for each individual Pressing process again be kept within relatively narrow limits. Is too the individual placement of the bricks on the dosing grid and that with defined This unit is pressed firmly against the surface of the mortar a relatively time-consuming process.

The invention is therefore based on the object of a method in the preamble of claim 1 type so further developed and suitable for its implementation Devices indicate that building blocks and in particular from aerated concrete manufactured blocks quickly without great skill requirements can be mortared in a way that saves material and too flawless masonry that fully complies with construction regulations leads.

To achieve this object, the invention provides that claims 1 and 9 respectively and 10 summarized features.

The measures according to the invention achieve that on the underside the building blocks automatically and thus under permanently constant conditions a layer of mortar is applied, the parameters required for this only at the beginning of a longer one for applying mortar to many building blocks Workflow to the mortar consistency and environmental influences, such as temperature and humidity, etc. must be adjusted after performing this But remain constant over a long period of time can, without the operator having to make new adjustments for each application process carry out or use personal experience got to.

The mechanical devices by means of which the mortar out of stock is promoted upwards and against the underside of the block so that it attached to this, can be easily trained so that they are even and work reliably and one stone at a time with the required Mortar layer is provided.

Experiments with devices operating according to the method according to the invention, have shown that with thin-bed mortar application on plan stones a mortar saving of up to 40% compared to the conventional application method by hand as well as a comparable time saving.

A particular advantage of the method according to the invention is that the building block no longer has to be turned or turned after applying the mortar. He can change his spatial orientation from applying the mortar to putting it on to maintain the masonry at least in such a way that its with mortar provided bottom remains constantly below.

These and other advantages of the method according to the invention and of its Implementation provided devices are laid down in the subclaims.

Figur 1

eine Seitenansicht einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens,

Figur 2

eine Stirnansicht der Vorrichtung aus Figur 1 mit angesetzeter Mörtelmischvorrichtung

Figur 3

eine Draufsicht auf die Vorrichtung aus Figur 2 und

Figur 4

eine Stirnansicht einer an die Mörtel-Auftragsvorrichtung aus den Figuren 1 bis 3 ansetzbaren Vorrichtung für den vertikalen Weitertransport von Bausteinen auf deren Unterseite Mörtel aufgetragen worden ist.

The invention is described below using an exemplary embodiment with reference to the drawing; in this show:

Figure 1

a side view of an apparatus for performing the method according to the invention,

Figure 2

an end view of the device of Figure 1 with attached mortar mixing device

Figure 3

a plan view of the device of Figure 2 and

Figure 4

a front view of a device that can be attached to the mortar application device from FIGS. 1 to 3 for the vertical further transport of building blocks on the underside of which mortar has been applied.

The device shown in Figures 1 to 3 for applying mortar to the The underside of a module 2 is on a table-like, 3-wheeled on three wheels Frame 4 mounted, the essentially of welded metal profiles or tubes is formed, the four vertical supports 5, two upper longitudinal spars 7; two upper cross bars 8 and four lower connecting bars include. The wheels 3 are designed as swivel wheels (not shown), at least one of which can be determined.

On the mutually facing inner sides of the longitudinal spars 7 are in the Figures 1 and 3 left stone feed area several support rollers 10 rotatable stored, of which the far left is drivable, like this below is explained in more detail, while the rest are free running. In the in the figures 1 and 3 right area, the longitudinal spar 7 has a number of support and Guide rollers 12, which in the transverse direction further support and guide rollers 12 'opposite one another, which are freely supported on a guide rail 13, which extends almost over the entire length of the frame 4 and in Transverse direction is adjustable, as indicated by the double arrow V in Figure 3 is to adjust the distance between the support and guide rollers 12, 12 ' to allow for different block sizes.

Between the two longitudinal spars 7 there is an open top for cleaning purposes Handles 15 removable mortar tray 16, in which the ready mixed Thin-bed mortar is poured in through a filler neck 17 on the side can be, so that there is a supply of mortar in the tub during operation located.

A coating roller 22, the jacket 23 of which is immersed in this mortar supply from an elastic material that is easily wettable by the mortar, for example There is rubber and to improve mortar adhesion with knobs or similar Bumps (not shown) can be provided.

The coating roller 22 is with the aid of stub axles 25 (see FIG. 1) cut into the flat walls of the tub 16 from above Extend slots (not shown) outwards in two on the frame 4 mounted bearing blocks and is supported by an electric motor 27 with an angular gear driven for rotation in the direction of arrow R.

With this rotation, the coating roller promotes a layer of mortar from the supply up into a mortar application zone, in which it adheres to it Mortar layer against the bottom of one on the support rollers 10 and Support and guide rollers 12, 12 'above them in the direction of arrow F. Moving block 2 presses so that it detaches from the jacket 23 and on the block 2 remains liable. To the thickness of the adhered to the bottom of the block 2 Mortar layer depending on the nature of the block surface and to be able to adjust the mortar consistency, the pedestals are vertical Adjustable direction (not shown).

The same also applies to a behind in the direction of movement F of the block 2 the coating roller 22 inside the trough 16 arranged doctor blade, which for Post-processing of the mortar layer adhering to the underside of building block 2 serves and can be designed, for example, as a notched trowel. By positioning the squeegee in the mortar trough 16 ensures that excess mortar, which is scraped off the underside of module 2, falls back into the supply and, without soiling the work area, for further processing Available. A screen grid clearly recognizable in the top view of FIG. 3 30 retains coarser components.

The doctor blade and the coating roller 22 have a smaller width than that building blocks 2 to be provided with mortar, so that along their underside an edge strip remains mortar-free on both longitudinal edges. This offers a number of Advantages: On the one hand, the building blocks 2 are moving through the device according to the invention and, if appropriate, also during further transport this edge strip on the relevant support and guide rollers 12 or Similar facilities on without being contaminated by mortar.

On the other hand, the mortar layer adhering to the underside of the building blocks 2 when placing the blocks on existing masonry in these edge strips dodge into it without the risk of escaping from the wall joint and excess mortar running down the wall surfaces consists. At the same time, the uniform coverage required by the DIN standards the underside of the block is ensured by mortar in the finished masonry.

If with the device according to the invention blocks with very different Widths to be processed, it is appropriate to use coating rollers and squeegees with different dimensions to match the respective block size use. The distance between the rows of support and guide rollers 12, As already mentioned, 12 'is adjustable for this purpose anyway.

On the stub axle 25, which is opposite the drive motor 27 (see figure 1) a pulley 34 is rotatably mounted, which via a belt 35 and another pulley 36 drives two belt drives 37, 38, of which one for driving the already mentioned, leftmost outer roller 10 serves while the other drives a first brush roller 39, which in Direction of movement F of the block 2 in front of the mortar trough 16 between the two Longitudinal bars 7 is mounted so that they brush on the underside of the it acts out led blocks 2 and freed of loose dirt and dust. By arranging this brush roller 39 in front of the mortar tray 16 is for worried that material brushed off from block 2 is not in the mortar stock falls.

Another belt drive 40, which is also driven by the pulley drives a second brush roller 41, one on the top of the frame 4 mounted support frame 42 is height adjustable so that they passed the top of it in the direction of arrow F below it Blocks 2 cleans. The height adjustability of this second brush roller 41 also serves to adapt to different block dimensions.

Above the mortar application zone is another on the top of the frame 4 Support frame 45 mounted, on the two of which each by an electric motor 47, 47 ' driven friction wheel pairs 48, 48 'around perpendicular to the conveying direction F of the module 2 extending axes are tiltable, as shown in Figure 1 by one hand solid and on the other hand dashed lines is shown. This The friction wheels 48, 48 'can be tilted to adapt to different ones Stone heights. In the shown in Figure 1 with dashed lines, for the Promotion of a comparatively low module 2 serving job position press the friction wheels 48, 48 'with their rubber coating onto the top of the Module 2 and move it by turning it in the direction of Arrow F. The friction wheels 48, 48 'are positioned so that a in placed on the left on the support rollers 10 and driven by the roller sufficiently advanced to the left friction wheel pair 48 block 2 from gripped this friction wheel and then automatically between the brush rollers 39, 41st pulled through and passed over the mortar application zone. In the course of This movement is then accompanied by the right pair of friction wheels 48 'in FIGS. 1 and 3 engages the top of the stone and also takes over the further transport of the stone when the left pair of friction wheels 48 in these figures is no longer on its Top rests. In this way, one from the left end of FIG and 3 shown device supplied and initially pushed forward by hand Building block on the free-running carrier rollers 10 and the free-running Tragund Guide rollers 12, 12 'automatically promoted until he in these figures has reached the right end of the arrangement. There he can either from Hand removed or moved by a downstream conveyor are explained in more detail with reference to FIG. 4 becomes. Instead of or in addition to the top of the Building block 2 engaging friction wheel pairs 48, 48 'can also on the Friction wheels attacking side surfaces can be provided or the module can be used With the help of a carriage that can be moved back and forth in the direction of arrow F over the Mortar application zone and the subsequent squeegee are moved away.

Use from above against the top of module 2 Friction wheels 48, 48 'is preferred, however, because the block 2 prevents them from doing so will evade the force with which the coating roller 22 of the pressed mortar presses against its underside 1.

At the right end of the longitudinal spar 7 and the guide rail in FIGS. 1 and 3 13 is an extension rail 50 is articulated so that it about a pivot axis 51 from a horizontal one in FIGS Dashed lines depicting the position in which they can run freely on them mounted support and guide rollers 52, 52 'the movement path for the Extend building blocks 2, in an approximately vertical, in Figure 1 with solid Lines reproduced position can be pivoted.

The distance to the left most of the extension rails 50 Carrier and guide rollers 52 'of the pivot axis 51 is chosen so large that the rollers 52 'in the swung-up position so far above the support and guide rollers 12, 12 'of the longitudinal bar 7 or the guide rail 13 lie that even the largest with the device described with mortar visible blocks 2 can move freely underneath them.

The extension rails 50 are brought into the swiveled-up position, if the mortar application device with a transport device connected to it is operated as follows with reference to FIGS. 4 and 5 will be explained in more detail. If no such transport device comes to Use, the extension rails 50 are folded down so that the blocks 2 transported in the direction of arrow F up to the right support 5 can move to the right. In this way it is possible that there are up to three building blocks 2 on the mortar application device at the same time.

In FIG. 1 there is one in the mortar trough 16 under the coating roller 22 Stirring roller 55 arranged axially parallel, the rotation of which is indicated by (not shown) means with the rotation of the coating roller 22 is coupled. This stirring roller 55 is used for sedimentation in the Prevent tub 16 located mortar supply.

The described electric motors 27 and 47, 47 'are common Connection cable (not shown) supplied with electrical energy, which leads to a Terminal box 56 leads, starting from the other connecting lines the individual consumers are misplaced

Since the one used in the mortar application device described Thin bed mortar is not commercially available, must be the commercially available mortar powder mixed with water and mixed until ready for processing required viscosity is reached.

To automate this dilution and mixing process, as in Figure 2 to the device for applying mortar to the underside of Building blocks are a mixing device 70 which consists essentially of a barrel-like container 72 which is stationary during operation and has an overhead one Filling opening 73 and an emptying opening provided in container bottom 74, a shut-off valve 77 closing this discharge opening, which for Mortar removal can be opened, and one by a drive device 79 driven stirring device for mixing the container contents.

This stirring device comprises a vertically arranged stirring shaft 81, the lower one End immediately above the bottom 74 of the container 72 carries agitator vanes 83, and the upper end thereof via an angular gear 87 from an electric motor 92 is driven.

Outside the bottom of the container bottom 74 there is the shut-off device 77 mounted so that it can be operated by hand to the drain opening in To close or open container bottom 74. To the shut-off device 77 closes a downward, slightly inclined towards the vertical Outlet pipe 94, which opens into the filler neck 17.

In order to obtain the required height, the mixing device 70 is on the Mortar application device suspended as shown in Figure 2.

As an alternative to this, the mixing device 70 can also have its own feet with appropriate roles are provided, stand directly on the floor. In In this case, the mixing device 70 is then operated by a suitable one Locking device releasably fixed to the frame of the device connected to applying mortar.

The shut-off element 77 with the attached outlet pipe 94 can be on the underside of the container bottom 74 to be pivotally attached to during assembly of the mixing device insert the outlet pipe 94 more easily into the filler neck 17 to be able to.

During operation, the required containers 72 are first opened Amounts of water and thin-bed mortar powder are poured into the shut-off device 77 is closed. This filling can happen gradually while the electric motor 92 is already running and the agitator shaft via the angular gear 87 81 drives for rotation so that the agitator vanes 83 the contents of the container mix evenly.

Has a sufficient amount of mixed thin-bed mortar the required Viscosity reached, the shut-off device 77, which is operated by a slide or a flap can be opened, so that the finished mixed Thin-bed mortar flows into the mortar trough 16.

The container 72 can have a capacity of approximately 30 liters, for example.

The electric motor can run at such a speed that for the agitator shaft 81 a rotation speed of about 200 to 600 revolutions per Minute is reached.

When the first batch of thin-bed mortar mixed in the mixing device 20 has been let into the mortar trough 16 and gradually processed there with the shut-off device 77 closed, the next batch of mortar be prepared in the mixing device 70 so that the entire arrangement is operated continuously. Even if processing one in the mortar pan 16 drained previous batch of mortar in somewhat longer time There is no risk that it will dry out in the container 72 comes from mortar, because this is constantly in motion by the stirring device can be held.

As already mentioned, the container 72 is so high that the over it the shut-off device 77 and the outlet pipe 94 easily flowing out mortar mixture from above into the filler neck 17 of the device for applying mortar can break in. Since this filler neck is approximately open at table height, the bottom of the container is preferably at a height between 50 and 80 cm above the ground.

To fill the container 72 with water and mortar powder is not unnecessary To complicate, its height is chosen so that the filler opening is not higher than 130 cm above the ground when the container 72 is as shown in Figure 2, is attached to the mortar application device.

Furthermore, an additional drain tap 93 can be provided to mix Remove mortar for special purposes immediately, without it in the mortar trough arrives.

Thus, the mixing device described enables it without an additional hand mixer pre-mix the required mortar outside the mortar trough, that it can be filled directly into the mortar tray 16. The drive device must 79 only switched on and off by an operator become. A constant presence of the operator, as with one of Hand held mixer is required.

The viscosity of the finished thin-bed mortar can be set very precisely, without wasting water and / or mortar powder. Because the stirrer can run practically constantly, there is none Risk of mortar drying in the mixing container and thus being lost. Also will form lumps as used when using conventional hand-held mixers occurs, effectively avoided.

FIG. 4 shows a transport device 58 serving as an elevator also as with the help of wheels, at least one of which is lockable, Mobile frame is formed using a connecting device in a detachable manner with the frame 4 of the device described for applying mortar to building blocks in a detachable way, but during the Operation firmly, can be connected so that the transport device 58th rotatably mounted rows of support and guide rollers 60 at the same height are like the support and guide rollers 12, 12 'of the frame 4 and the of the latter formed conveyor line for those provided with mortar on their underside Continue building blocks 2 in a straight line, with all support and guide rollers 60 of the transport device 58 are freely supported. One of the friction wheel pair 48 ' Released block 2 is from the following block up to one Starting position for further transport promoted in the same as when it was applied edge strips of its underside completely left free of mortar the support and guide rollers 60 rests without his coated with mortar Bottom comes into contact with any other parts. When reaching the mentioned starting position, the respective module 2 actuates a limit switch, whereby the driven support roller 10 and the two pairs of friction wheels 48, 48 'are stopped.

One that moves in operation beyond the right end of the frame 4 in FIG. 1 Module 2 is held in this starting position until it is from one of the lifting devices 62 connected to an endless chain 63 in the manner of a paternoster elevator revolve in the direction of arrows H, taken over and up is promoted. As a result, the aforementioned limit switch is released again, however, the reclosing signal for the support roller 10 and the friction wheel pairs 48, 48 'delayed until the one taken over by the lifting device 62 Building block is raised so far that the next moving forward Module can get into the aforementioned starting position unhindered.

The module 2 detected by one of the lifting devices 62 can reach up to the height on a scaffolding level from which it can be further processed should. There is either the module 2 coated with mortar on its underside removed by hand and placed on the already built masonry or with the help of an appropriately trained transport device in horizontal Forwarded direction.

It is essential in all these transport processes that the mortar coated Bottom of the block 2 always remains below, so that even when brief Interruptions in the conveying process occur, both against solar radiation as well as rain is largely protected.

Claims (33)

1. A method of applying mortar, in particular thin-bed mortar, to the underside of a brick or block to be laid, in particular of porous concrete, wherein a supply of mortar is prepared in a container, characterised in that the mortar to be applied is conveyed automatically out of the supply container upwardly into a mortar-application zone and is there applied to the underside of the brick or block which is moved over the mortar-application zone.
2. A method according to claim 1 characterised in that the mortar-application zone covers an area which is smaller than the area of the underside of the brick or block and that the brick or block, for applying mortar to at least the major part of its underside, is moved in an advance movement over the mortar-application zone.
3. A method according to claim 2 characterised in that in the advance movement the brick or block is displaced in its longitudinal direction.
4. A method according to claim 3 characterised in that the mortar-application zone is considerably shorter in the longitudinal direction and somewhat narrower in the transverse direction than the underside of the brick or block so that when mortar is applied to the underside of the brick or block over the entire length thereof by virtue of the advance movement of the brick or block two edge strips remain mortar-free along the two longitudinal edges of said underside.
5. A method according to one of claims 2 to 4 characterised in that the advance movement of the brick or block occurs at a speed which is in the range of 15 m/min to 20 m/min.
6. A method according to one of claims 1 to 5 characterised in that prior to application of the mortar the brick or block is automatically cleaned of loose dust and dirt at least on its underside.
7. A method according to one of claims 1 to 6 characterised in that the distribution of the mortar applied to the underside of the brick or block is subsequently automatically altered, wherein the brick or block retains its orientation in space at least in such a way that its side which is coated with mortar still faces downwardly.
8. A method according to one of the preceding claims characterised in that the brick or block provided with mortar is automatically transferred to a transport device for further guiding it, in such a way that in the transfer and during further transportation thereof it retains its orientation in space at least in such a way that its side coated with mortar constantly faces downwardly.
9. Apparatus for carrying out the method according to one or more of the preceding claims characterised in that it includes a pump, by means of which the mortar is conveyed out of the supply container upwardly into the mortar-application zone and is there sprayed against the underside of the brick or block.
10. Apparatus for carrying out the method according to one or more of claims 1 to 8 characterised in that it includes a rotating coating roller (22) which dips into the mortar supply with a part of its peripheral surface and by means of which the mortar is conveyed upwardly into the mortar-application zone and is there pressed against the underside of the brick or block (2).
11. Apparatus according to claim 10 characterised in that the axis of rotation of the coating roller (22) extends substantially perpendicularly to the direction (F) of the advance movement of the brick or block (2).
12. Apparatus according to claim 10 or claim 11 characterised in that the coating roller (22) dips into the supply of mortar approximately as far as a third of its diameter.
13. Apparatus according to claim 12 characterised in that the coating roller (22) is mounted adjustably in respect of height.
14. Apparatus according to one of claims 10 to 13 characterised in that the direction of rotation (R) of the coating roller (22) in the mortar-application zone is in the same direction with respect to the direction (F) of the advance movement of the brick or block (2).
15. Apparatus according to one of claims 10 to 14 characterised in that the coating roller (22) has a casing (23) of elastic material.
16. Apparatus according to claim 15 characterised in that the casing (23) of the coating roller (22) comprises rubber.
17. Apparatus according to one of claims 10 to 16 characterised in that an agitation device is provided in the supply of mortar.
18. Apparatus according to claim 17 characterised in that the agitation device includes an agitation roller (50) arranged in the mortar supply with its axis parallel to the coating roller (22).
19. Apparatus according to one of claims 9 to 18 characterised in that provided downstream of the mortar-application zone are two mutually parallel rows of free-running support and conveyor rollers (12, 12'), which rows are arranged transversely with respect to the direction (F) of the advance movement of the brick or block (2), the brick or block (2) resting on the support and conveyor rollers during the advance movement of the brick or block only with the side edge regions of its underside.
20. Apparatus according to claim 19 characterised in that the spacing between the two rows of support and conveyor rollers (12, 12') is adjustable.
21. Apparatus according to claim 19 or claim 20 characterised in that the brick or block (2) is driven by means of at least one friction wheel (48, 48') for the advance movement of the brick or block.
22. Apparatus according to claim 21 characterised in that the at least one friction wheel (48, 48') can be pressed from above against the top side of the brick or block (2).
23. Apparatus according to one of claims 9 to 22 characterised in that in its advance movement the brick or block (2) is moved over a doctor member which is arranged downstream of the mortar-application zone and which can be pressed against its underside.
24. Apparatus according to claim 23 characterised in that the doctor member is adjustable in respect of height.
25. Apparatus according to one of claims 9 to 24 characterised in that in its advance movement the brick or block (2) passes through a cleaning device (39, 41) arranged upstream of the mortar-application zone.
26. Apparatus according to claim 25 characterised in that the cleaning device (39, 41) includes at least one rotating brush roller (39) which can be pressed against the underside of the brick or block (2).
27. Apparatus according to one of claims 9 to 26 characterised in that on the brick or block feed side it includes support rollers (20) for the brick or block (2) to be coated with mortar, of which rollers at least one is drivable for a rotational movement in order to move the brick or block (2) forwards in the direction of the mortar-application zone.
28. Apparatus according to one of claims 9 to 26 characterised in that it includes a mixing device (70) which has the following components:

    a drum-like container (72) which is stationary in operation, with an upwardly disposed filling opening (73) and an emptying opening provided in the container bottom (74),

    a shut-off member (77) for closing the emptying opening, which can be opened for the removal of mortar, and

    an agitation device (81, 83) driven by a drive device (79) for mixing the container content.
29. Apparatus according to claim 28 characterised in that the agitation device (81, 83) includes an agitator shaft (81) which is supported at one end above the top side of the container (72) and which extends substantially perpendicularly almost to the bottom (74) of the container (72) and at its lower end carries an agitator blade arrangement (83).
30. Apparatus according to claim 29 characterised in that the drive device (79) is arranged outside the container (72) in the proximity of the top side thereof.
31. Apparatus according to one of claims 28 to 30 characterised in that the drive device (79) includes an electric motor (92) with an output bevel transmission (87).
32. Apparatus according to one of claims 28 to 31 characterised in that the mixing device (70) in operation is mounted so high that the shut-off member (77) is between 50 cm and 80 cm above the ground.
33. Apparatus according to claim 32 characterised in that the height of the container (72) is such that in operation the filling opening (73) is around not more than 130 cm above the ground.

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