The invention relates to a broom body having, on its underside facing the surface to be cleaned, at least two cleaning bodies made of different materials, where one cleaning body is formed by a foam material body which is non-positively and/or positively joined to the broom body.
Such broom bodies are known from DE 103 32 405 A1. The previously known broom body presents a foam material body and a carrier body provided with bristles. Here, the primary purpose of the bristles is the detachment and removal of firmly adhering coarse debris, and that of the foam material body is the removal of fine debris particles so as to prevent the generation of dust. The combination of the two materials allows the possibility of removing different types of debris with a single broom body. The foam material body here presents, because of the material and the full-surface design, a higher friction and it is subject to greater wear. Therefore, the foam material body is positively fastened to the broom body in such a way that allows its easy replacement.
In the previously known broom body, the fastening of the foam material body is carried out by means of a dovetail joint. However, the undercutting makes the joint expensive to manufacture.
The invention is based on the problem of providing a broom body which can be manufactured in a simple manner and which presents easily exchangeable foam material bodies.
This problem is solved with the characteristics of claims 1 and 2. The dependent claims relate to advantageous embodiments.
In a first solution, the foam material body can be introduced into the broom body, perpendicularly to the longitudinal axis of the broom body and the foam material body presents at least one fastening means for positively fastening it to the broom body. With a perpendicular direction of introduction, the joint for fixing the foam material body can be designed without undercuts. For example, the joint can be formed with a rectangular or V-shaped socket, which can also be manufactured particularly advantageously in an injection molding process. During the cleaning process, the socket transmits the forces and torques into the broom body. To fasten the foam material body in a manner that does not allow detachment, the foam material body presents at least one fastening means by which the foam material body can be fixed on the broom body.
In an additional solution, the foam material body presents a fastening means which is designed as a dovetail pin, and which can be introduced into a correspondingly shaped dovetail socket, where the dovetail socket is interrupted in sections. The dovetail socket is designed here so that it is raised and it extends above the surface of the broom body. The interruptions and dovetail socket sections are preferably placed opposite each other. If this arrangement is used, the manufacture is simplified, particularly the manufacture of the broom body by injection molding, because the interruptions allow the easy introduction of the tool for forming the dovetail socket sections. In this embodiment, the introduction of the foam material body occurs parallel to the longitudinal axis of the broom body. To fix the foam material body, the dovetail pins can present an elevation or a recess at one end, which can be engaged to a recess or an elevation arranged in a dovetail socket section. This fixation allows a secure fastening and can be easily manufactured.
The fastening means can be formed by a headless pin, which can be engaged in an opening of the broom body and can be fixed by means of a screw. Headless pins are available as prefabricated semi-finished parts. A screw connection is a connection that is simple to manufacture and secure. The operation is simple. In this embodiment, profiles for torque transmission can be omitted, allowing a particularly simple manufacture of the broom body.
The fastening means can be formed by a pin which is provided with bulges, where the pin can be engaged into a recess of the broom body where the broom body presents a longitudinal slit into which locking element can be introduced, and where the locking element can be engaged in the undercut formed by the bulge. Here, only two manual movements are required for fastening the foam material body: on the one hand, the introduction of the foam material body and on the other, the latching by means of the locking element. Because of the engagement, it is easy to check the connection. The locking element presents a simple structure and can be manufactured simply and cost effectively.
The fastening means can be formed by at least one strap, which can be introduced through an opening of the broom body, where the strap presents a film hinge and a snap hinge closure element. The strap here is formed of the same material as, and as a single piece with, the foam material body or a carrier body arranged on the foam material body. As a result, the number of parts is reduced. Because of the snap hinge closure element, the seating of the connection can be easily checked, because the engagement can be heard and sensed when it occurs.
The fastening means can be formed by an essentially rectangular profile, which can be engaged into a correspondingly shaped matching profile of the broom body, as well as by a snap hinge closure element which can be engaged into a recess of the broom body. In this embodiment as well, there is a reduction in the number of parts. Moreover, the profiles can be manufactured simply and cost-effectively.
The foam material body can present a carrier body on which the fastening means is arranged. Here, the carrier body can be manufactured from a more stable and more rigid material, particularly a material that is suitable for injection molding. The fastening means is then arranged in a stable way on the carrier body. In this embodiment, the strap is formed from the same material as, and as a single piece with, the carrier body.
The carrier body can partially enclose the foam material body. Here, the force transmission from the foam material to the carrier body is improved, and the load is distributed over a larger surface area. The foam material body is guided securely.
The carrier body can comprise two parts which are non-positively and/or positively joined. A two-part carrier body is easier to manufacture. The two parts can be non-positively and/or positively joined, whereby material-to-material connections are possible. Positive and non-positive connections allow a simple replacement of the foam material body, and the carrier material can be reused.
One part can present protrusions which can be inserted into recesses of the foam material body. As a result, the foam material body is positively fixed in the carrier body in a manner that prevents detachment.
At least one part can present tooth-shaped elevations. The tooth-shaped elevations that dig into the foam material body form a fixation. The tooth-shaped elevations can be provided in addition to the protrusions on the carrier body.
Both parts can present tooth-shaped elevations, which are arranged so that the parts mutually engage. Here, the foam material body is fixed between the teeth, and as a result the connection is even more stable.
Several embodiments are shown below with reference to the figures. The figures show, each schematically:
The figures show a broom body 1, which presents, on its bottom side 2 facing the surface to be cleaned, at least two cleaning bodies 3, 4 made of different materials. One cleaning body 3 is formed by a foam material body 5, and the other cleaning body 4 is formed by bristles. The additional cleaning body 4 is non-positively and/or positively connected to the broom body 1, because the wear of the bristles is negligible. The foam material body 5 is non-positively and/or positively joined to the broom body 1. For positive fastening, the foam material body 5 presents at least one fastening means 7. The foam material body 5 presents a carrier body 24 on which the fastening means 7 is arranged.
The foam material body 5 of the following figures can be inserted into the broom body 1 perpendicularly to the longitudinal axis 6 of the broom body 1. For positively fastening the foam material body 5 to the broom body 1, each foam material body presents at least one fastening means 7.
Number | Date | Country | Kind |
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10 2005 022 948.4 | May 2005 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2006/002926 | 3/31/2006 | WO | 00 | 1/25/2008 |