The invention relates to a hand grip with half-shells, which is constructed so as to be able to be fastened to a tubular pipe and is provided with a mounting opening for the tubular pipe, in particular for use for a scythe.
In known scythes, which are provided with a so-called U-handlebar, grip shells are constructed so that they surround a grip tube over their entire length. This is necessary, because the grip shells are exposed to high stresses. The grip shells, constructed as half-shells, are thus prevented from moving apart when a high stress acts upon the half-shells. The tube piece projecting far into the handle takes up a large amount of space, however, so that only a very space-saving grip mechanism can be used.
It is known in addition to construct the hand grip so that the tube dips up to a half into the hand grip. A corresponding clamping area or a corresponding clamping region is, however, correspondingly smaller in this solution. Thereby, the grip mechanism can be increased in size accordingly. However, this brings it about that the half-shells or clamping shells can move apart upon a stressing in a front region of the grip and in its centre. In order to prevent a spreading apart of the half-shells, a screw is used which connects the two half-shells with each other there. However, this solution has the disadvantage that in the grip region a bore is present for the screw, which has an intrusive effect for the user.
The invention is based on the problem of providing a hand grip with half-shells of the said type, which on the one hand is fastened securely to the tube and on the other hand has no intrusive bores in the grip region, with a generous space to be available for a grip mechanism.
This problem is solved by a hand grip with the features of Claim 1.
In particular, provision is made here that each half-shell is provided with a holding arrangement corresponding to the tubular pipe, so that each half-shell is provided with a holding arrangement corresponding to the tubular pipe, so that both holding arrangements form a form-fitting mounting for the respective half-shell on the tubular pipe.
Further advantageous developments of the invention are characterized in the sub-claims.
Through the invention, in a simple manner the half-shells are prevented from being able to open at high forces, although the tube end can terminate approximately in the centre of the grips. The grip region can be provided so as to be continuous, i.e. without bores or suchlike, which is felt to be very comfortable when the scythe is being used. Because the clamping area or the clamping region can offer a very large amount of space, a robust grip mechanism can be arranged on the grip.
Furthermore, the solution according to the invention can be converted at a very favourable cost, because it does not require any additional installation parts and installation steps.
In an advantageous further development of the hand grip according to the invention, provision is made that on the two half-shells respectively at least one engagement piece is arranged as a holding arrangement, which engages into the tube interior of the tubular pipe and after the insertion of the tubular pipe up to a stop is caught with the tubular pipe such that both grip halves are pressed against each other and form a form-fitting connection. An installation is therefore very simple. Both grip halves can be joined together, with the grip being able to be subsequently pushed onto the tubular pipe. Through this installation movement, a fixing on the tube is brought about automatically. Additional installation steps for the introduction of a screw and for the screwing thereof are not necessary.
It is particularly advantageous when both half-shells are connected with each other by means of a hinge joint, so that they can be swivelled to each other and folded on each other. Suitable grip halves are immediately available via the hinge joint, which further shortens the installation time. Preferably, the joint is arranged on the grip head. Thereby, the half-shells are, moreover, additionally held together at the head end, which produces a secure connection between tubular pipe and grip.
The production of such a hinge connection and of both grip halves can be converted at a favourable cost, when the hinge joint is constructed as a film hinge and both half-shells are connected in one piece with each other by the film hinge, in particular are produced from a single plastic injection process.
In a further advantageous embodiment of the invention, each holding arrangement is constructed as an engagement hook comprising at least one barb, which engagement hook engages into a corresponding tube opening on the tubular pipe, such that when the half-shells are pushed onto the tubular pipe or when the tubular pipe is pushed into the half-shells, the latter engage so that a secure connection is provided, which can only be released when the barbs are released mechanically out of the corresponding tube opening. After the tubular pipe is placed on the handle, it can no longer become unintentionally released. Nevertheless, a dismantling is possible when the barbs are pressed back. This can be achieved with an auxiliary tool or with a current tool which can be introduced from the head side of the grip. Alternatively, a dismantling can take place by a relatively high tractive force. Here, it can even be accepted that the barbs are destroyed in so doing. As an exchange of the grip is only expedient when the latter or its mechanism is defective, the damage to the barbs is not relevant.
It is favourable that each holding arrangement is constructed substantially as an L-shaped shaped part projecting from an inner surface of the corresponding half-shell. In particular, each holding arrangement consists of two parallel L-shaped legs, which are bridged at their end with a connecting cross-piece, so that at a front end of the legs a U-section is present. This construction offers the advantage that on the one hand an injection moulding process is able to be used, and on the other hand, through the front connecting cross-piece, a large detent surface or a large detent attachment is present, with the two legs, connected rigidly with each other, bringing about a robust construction.
Expediently in the vicinity of the mounting opening and/or in the head region at least one connecting screw is present, connecting the two half-shells and penetrating through a corresponding tube bore. Such a screw does not have an intrusive effect on the user, because it lies outside the grip region. The connection between grip and pipe is thereby very stable.
An application of the invention for a grip with a grip mechanism arranged in a clamping area for operating a motor tool, in particular a motor scythe, is very advantageous, because the pipe of a U-handlebar only has to reach up to the centre of the grip and the remaining space which is gained between the grip head and the pipe is available for mechanical elements.
An example embodiment is described in further detail with the aid of the drawings, with further advantageous further developments of the invention and advantages thereof being described, there being shown purely diagrammatically:
a an illustration of the holding arrangement from a different angle of view, in which only one barb and one half-shell are illustrated,
b an illustration of the barb,
In the figures, identical parts are given the same reference numbers.
a or 2b show the solution according to the invention, which consists in that each half-shell 3, 4 is provided with a holding arrangement corresponding to the tubular pipe 2, so that the two holding arrangements 6 form a form-fitting mounting onto the tubular pipe 2.
On the two half-shells 3, 4 respectively at least one engagement piece 7 is arranged, with only one engagement piece 7 being able to be seen in
Through this engagement, the two half-shells 3, 4 are pressed against each other. Here, a form-fitting connection is produced between the half-shells 3, 4 and with the tubular pipe 2.
The two half-shells 3, 4 can be connected with each other by means of a hinge joint which is not shown. Thus, they can be swivelled to each other and folded on each other. The hinge joint would then be arranged at the head 12 such that the swivelling movement takes place about the axis X shown in
As
In
In addition to a grip bore for the connecting screw, there can also be further bores 29, 30 in the vicinity of the head for further screws, as
From
Inside each half-shell 3, 4, as for example
As
The hand grip 1 is preferably constructed so that the connecting tube or connecting piece acting as tubular pipe 2 is connected in one piece with the steering rod of the scythe or is a part thereof. However, it is also conceivable that the connecting tube or connecting piece acting as tubular pipe 2 is constructed as a separate piece from the steering rod. The separate connecting piece can be a short pipe which is fastened to the steering rod. The separate connecting piece can, for example, be connected with the steering rod by a thread or with separate screws. Other form- and/or force-fitting connections are also possible.
In the region of the upper grip bores 29 to 30 (cf.
Number | Date | Country | Kind |
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20 2008 000 882.4 | Jan 2008 | DE | national |