DE3512364A1 - TOOL FOR PUTTING FINE CONCRETE INTO WALL JOINTS - Google Patents

Abstract

The tool (1) has a connecting device (4) for connection to the drill rod of a motor hammer. On the working side there is a curved active surface (2), by means of which it is possible for fine concrete introduced into wall joints to be compacted as effectively as possible. The struts (10) provide adequate stability of the tool (1) which is preferably produced as a drop forging. <IMAGE>

Description

Patent attorney · _β> »* *". * "" * ~ * * _Λ

Dipl.-ing. HELMUT PFISTER , b ^ s, ^ 3512364

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European Paten t Attorney ^ _{Telephone l0m}]} . _{6S] ω}

Poslsdiedkonlo MOndien Nr. 134339-805 TelexS4931 polpfm d Bayerische Vereinsbank Mammlngen No. 2303396

13/3

- a ΑΓΠ1985

Mr. Reinhold Schuster, master bricklayer, Haldenweg 5, §949 Oberauerbach

'Tool for placing fine concrete in wall joints "

The invention relates to a tool for introducing Fine concrete in wall joints.

When renovating masonry, for example older structures, part of the masonry is up to about one

Place of fulfillment and place of jurisdiction Memmlngen

including 4

Meters wide, broken out and replaced by new masonry. The problem here is how, regardless whether the masonry is bricked or made of concrete, the fine concrete in a joint above the new masonry and to be compacted underneath the old masonry to be supported. So far this has been done by hand with a mallet and round wood. This procedure is very labor intensive. Nevertheless, the compaction effect is uncertain. If sufficient compaction is not achieved, the masonry to be supported will settle and arise Cracks.

The invention has therefore set itself the task of providing a tool with the help of which a safe one Compaction of the masonry can be achieved that is simple to use, and that comparatively easily remain.

The invention is based on a tool for introducing fine concrete into wall joints and proposes that the tool has an elongated effective surface with a slightly smaller width than the joint height, and a device for the releasable connection of the tool with a motor-driven hammer, the direction of impact of the hammer being perpendicular to the effective surface runs.

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By using it together with a motor-driven, for example a compressed air, hydraulic or Electric hammer, the weight of the tool itself remains comparatively low, and yet a effective work possible. The fine concrete, in which an excess of water is to be avoided, is in the wall joints introduced, and compressed to the maximum with the help of the effective area. The use of fine concrete with if possible little water allows compaction and prevents the mass from escaping. Furthermore, the volume loss reduced during setting, so that the risk of settlement cracks occurring is low. By the slightly smaller width of the effective area than the height of the wall joint, the tool can be easily inserted into the wall joint and there is enough leeway when working.

In one embodiment of the invention, the active surface is essentially flat.

In another embodiment of the invention is the active surface arched like a fillet.

The concave-like curvature produces a particularly good one Compaction effect. In addition, this shape allows the tool to be held in the center of the joint while working is very relieved.

It has proven to be advantageous if the connecting device a drill pipe of the motor hammer

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on takes.

Such a drill pipe allows the use of commercially available motor hammers. So there is no need additional equipment.

The length of the drill pipe is adapted to the depth of the joint to be machined.

Depending on the degree of filling of the joint and the wall thickness must be expected up to a joint depth of approx. one meter. It is clear that such a joint depth means a longer one Drill rods require working towards the end, when the joint is already largely made of fine concrete is filled out. Usually the working spaces in front of the joint are very tight, so that it is necessary to use different lengths of drill pipe to work. The invention enables the replacement of the drill rods particularly simplified.

In one embodiment of the invention, a shoe with a larger width and / or is placed on the active surface Postponed length.

Such an attachment shoe can be used, for example, to counteract wear on the tool, or to enlarge the effective area. An increase in the effective area is particularly desirable when if higher wall joints are to be processed. Usually joints are about eight inches high intended.

It is particularly favorable when the tool is made in one piece

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is designed to withstand the heavy loads.

In addition, it is advantageous if the tool is designed as a drop forging. This embodiment is particularly durable, able to withstand heavy loads and with little wear and tear.

In the preferred embodiment of the invention, an elongated plate on the front carries the active surface and on the back the connecting device, as well as struts between the connecting device and the outer areas of the plate.

This shape can very well be made in one piece as a drop forging, and is also relatively light.

It is advantageous if the tool has rounded transitions between the plate, the connecting device and the preferably has triangular struts.

Due to the rounded transitions and the lack of breakthroughs, the mortar does not adhere well, and the tool is easy to clean »

In the drawing, one embodiment is one

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Tool according to the invention shown schematically. Show it:

Fig. 1 is a perspective view,

Fig. 2 is a side view and

Fig. 3 is a side view in Arbeitsstel

ment when working in a wall joint.

The tool 1 consists essentially of the elongated Plate 9, the struts 10 and the connecting device 4th

The plate 9 has on its underside an active surface 2 with a concave curvature. On its upper side, the plate 9 is connected to the connecting device 4 by means of the struts 10. The bracings 10 are triangular in shape and bear in its center, the connecting device 4, which in a cured opening the drill pipe 6 an engine hammer 5 shown in _Fig.> 3 is shown, receives. The drill rod 6 can easily be exchanged without any special tools.

The length of the plate 9 is approximately 30 cm, its width approx. 6 cm. The width is slightly less than the joint height 3 of the joint 8, which is about 8 cm. The depth of the Joint 8, i.e. the wall thickness, can be up to a meter or even more.

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In FIG. 3 it can be seen how the fine concrete 11 is compacted in the joint 8 with the aid of the active surface 2. is If the joint is still relatively deep, a particularly long drill rod 6 is used. Depending on the acceptance of the Joint depth in the course of the process, the drill rod 6 is exchanged for a shorter one.

The joint 8 is for example in a masonry, whose lower area is to be renewed piece by piece. In doing so, an approx Meter-wide piece removed and replaced with new masonry 12. Above the new masonry 12 initially remains the joint 8, which is closed at one end by a shuttering board 7, which in the usual Way is fixed. Now a sufficient layer of fine concrete 11 is first introduced and this layer compressed by moving the motor-driven tool 1 back and forth. Then further fine concrete is used and continued in this way until the entire joint 8 is filled with the compacted fine concrete.

The new masonry 12 can contain an insulating layer in the usual way, but this is not detailed is shown, and for example also in the joint can be arranged under the fine concrete 11.

If the fine concrete 11 that has been introduced has set sufficiently, a further section lying next to it can be used of the masonry, etc.

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The invention can also be implemented with a tool with a planar effective surface. A curved active surface, such as this is shown in the drawings, but has the advantage that when compacting the fine concrete 11 less tends to evade, and that it is also easier to get the tool 1 about in the To hold in the middle of the joint.

As a rule, the tool according to the invention is used to fine concrete in horizontal wall joints condense. It is clear that the tool can also be used when the joint has an inclined course or when it comes to vertical joints.

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Claims (9)

Patent claims: 1. Tool for introducing fine concrete in masonry i joints, characterized in that the tool (1) has an elongated action face (2) has a slightly smaller width than the gap height (3) and a device (4) for releasably connecting the Tool (1) with a motor-driven hammer (5) j wherein the direction of impact of the hammer (5) runs at right angles to the active surface (2). 2. Tool according to claim 1, characterized in that that the active surface (2) is essentially flat. 3. Tool according to one or both of the preceding Claims, characterized in that the active surface (2) is curved like a fillet. Place of jurisdiction and place of jurisdiction Memmlngen ORIGINAL INSPECTED 4. Tool according to one or more of the preceding claims, characterized in that the connecting device (4) a drill rod (6) of the motor hammer (5) receives. 5. Tool according to one or more of the preceding claims, characterized in that the length of the drill rod (6) is adapted to the depth (7) of the joint (8) to be machined. 6. Tool according to one or more of the preceding Claims, characterized in that a shoe with a larger width is placed on the active surface (2) and / or length is postponed. 7. Tool according to one or more of the preceding claims, characterized by a one-piece Execution. 8. Tool according to one or more of the preceding Claims, characterized in that the tool (1) is designed as a drop forging. 9. Tool according to one or more of the preceding Claims, characterized in that an elongated plate (9) on the front side the active surface (2) carries, and on the back the connecting device (4) and struts (10) between the connecting device (4) and the outer area of the plate (9). ΙΟ. Tool according to one or more of the preceding Claims, characterized by rounded transitions between the plate (9) and the connecting device (4) and the preferably triangular struts (10).