The invention relates to a rivet setting device.
With the aid of rivet setting devices, blind rivets for connecting at least two objects are set from the front side on an object and also deformed from the front side such that a closing head is formed on the rear side of the object on which the fastening takes place. For this purpose, using a rivet mandrel which acts on the rivet body on the opposite rear side, pulling takes place from the front side. For pulling on the rivet mandrel, there are manually actuated tongs or rivet setting devices having a motor drive. When setting the blind rivet, the rivet mandrel breaks off at a predetermined breaking point. The predetermined breaking point is usually formed in the rivet mandrel at a point which is arranged as far as possible still in the rivet sleeve. The broken-off remainder of the rivet mandrel must be disposed of.
There is already known a blind rivet setting device in which an electric motor actuates a pulling device which pulls on the rivet mandrel of the blind rivet held in the device. For pulling engagement on the rivet mandrel, a clamping tong is provided which has an inner cone and consequently loads clamping jaws inwardly against the rivet mandrel. As soon as the rivet mandrel has broken off, the user can tilt the device upwardly, with the result that the broken-off rivet mandrel slides downward through a tube and into a container (DE 4126602).
The object on which the invention is based is to provide a rivet setting device which collects the broken-off rivet mandrel remains without additional intervention or an additional measure on the part of the user.
To achieve this object, the invention proposes a rivet setting device having the features stated in claim 1. Further embodiments of the invention form the subject matter of subclaims.
The rivet setting device thus contains a housing and, in the housing, a holder for a rivet to be set. The holder conventionally engages on the rivet mandrel arranged in the rivet. A pulling device is arranged in the device and preferably engages with clamping jaws and clamping tongs on the rivet mandrel and pulls it in the axial direction. In the extension of the rivet mandrel, a receiving chamber is formed in the housing, said chamber being large enough for a rivet mandrel which is broken off during the formation of the closing head to be able to be received in said chamber. The broken-off part of the rivet mandrel is referred to hereinbelow as the residual mandrel. According to the invention, the receiving chamber is then assigned at least one magnet which attracts the severed residual mandrel and retains it therein.
For example, the magnet can be arranged at a distance, corresponding to the length of the residual mandrel, from the end of the holder in the axial extension of the holder. In this way, it can retain the residual mandrel there without impeding the exiting of the residual mandrel from the holder.
A further possibility of how the magnet can be arranged comprises arranging it, as seen in end view, laterally with respect to the space in the receiving chamber provided for the severed residual mandrel. In this way, it can be arranged directly behind the end of the holder and cooperate during the movement of the residual mandrel out of the holder.
It is particularly expedient, as the invention proposes in a further embodiment, to arrange two such magnets, specifically in each case one such magnet on opposite sides of the space in the receiving chamber provided for the severed residual mandrel. The two magnets here are preferably arranged in such a way that they leave free a space between them which is only slightly larger than the diameter of the residual mandrel.
It can be provided in particular to make at least one of the two, preferably both, magnets at least 50% of the length, preferably at least 75% of the length and, more preferably, at least exactly the length of the residual mandrel.
For the correct positioning of the residual mandrel in the receiving chamber, it can be provided according to the invention that a stop is formed or arranged at the end of the receiving chamber, against which stop the residual mandrel comes to bear or butts.
Since the receiving chamber and, if appropriate, the arrangement of the two magnets are preferably designed in such a way that only a single residual mandrel can be received there, the invention proposes in a further embodiment to accommodate in the housing a device for transporting away the residual mandrel contained in the receiving chamber into a collecting chamber likewise present in the housing.
For this purpose, it can be provided that the at least one magnet, but preferably both magnets are accommodated in a magnetic holder which is arranged so as to be movable in a direction transversely with respect to the longitudinal direction.
This holder can thus be in a position in which the two magnets are arranged in the described manner behind the end of the holder for the rivet mandrel. From this receiving position the magnetic holder can be displaced laterally to such an extent that space is present for the rivet behind the end of the holder, through which space a drive can act on the next rivet to be set which is now arranged in the holder. This position in which the rivet to be set is released for access by the setting device forms a release position of the magnetic holder.
According to the invention, at least one stripping element can be arranged in the housing, said element being situated in the path of the residual mandrel when the latter is moved together with the magnetic holder from the receiving position into the release position.
The stripping element is intended to be designed in such a way that, during the rearward movement of the magnetic holder from the release position into the receiving position, it strips the residual mandrel such that the latter is disengaged from the at least one magnet and then falls into the collecting chamber and remains therein. Since the residual mandrel is an elongate object, two such stripping elements are preferably arranged in the device, said elements each acting on the residual mandrel in the end region thereof.
According to the invention, in order to move the magnetic holder from the receiving position, in which thus the residual mandrel is engaged with the magnet, into the release position, a dedicated actuating element, whether mechanical or motor-operated, can be provided. Of course, synchronization or blocking must be provided so that a setting operation can take place only with the magnetic holder in the release position.
However, it is also possible that the movement of the magnetic holder takes place by means of a drive which is common with the remaining actuations of the rivet setting device. The rivet mandrel breaks off during the operation of the pulling device. At this time, the magnetic holder must thus be in the receiving position. After the actuation of the pulling device and after the rivet mandrel has been broken off, the pulling device must return again to its initial position. The setting operation is then triggered. The triggering of the setting operation can be used to move the magnetic holder from the receiving position into the release position.
It has already been mentioned that the rivet setting device has a collecting chamber for a plurality of residual mandrels. According to the invention, it can be provided that the collecting chamber is arranged at a point on the rivet setting device which is situated at the bottom during normal horizontal handling of the rivet setting device.
In a further embodiment of the invention, it can be provided that a non-rectilinearly extending channel is provided for the movement path of the residual mandrels in order to prevent residual mandrels from passing back into the receiving chamber during non-horizontal handling of the device and causing a blockage in the channel.
Further features, details and advantages of the invention will become apparent from the claims and the abstract, the wording of both being incorporated in the description by reference, and from the description below of preferred embodiments of the invention and with reference to the drawing, in which:
The front end, illustrated in
A pulling device 5 cooperates with the holder 2. The pulling device, which can be moved by a drive (not shown) from the position represented in
In the axial extension of the holder 2 or of the channel 3 formed therein, a residual mandrel holder 12 is arranged in the housing. The residual mandrel holder 12 has two magnets 13, of which the section of
The residual mandrel holder 12 has in its upper region a through-passage 14 which, in the position of the residual mandrel holder 12 illustrated in
At the end of the residual mandrel holder 12 that faces away from the holder 2, a stop 15 is formed in the region of the end of the magnet 13, the distance of which stop from the end of the holder 2 is somewhat larger than the length of the residual mandrel. By residual mandrel is meant the part of a rivet mandrel which is situated beyond the predetermined breaking point. This part of the rivet mandrel is broken off during the setting operation.
In the position illustrated in
The pulling device 5 can now be released, the clamping tongs 6 are moved back into the position illustrated in
As can be gathered from a comparison of
This can be gathered more exactly from
Below the stripping element 24 there is formed a channel 25 in the component 23, which remains stationary during the displacement, which channel has a curvature 26 before it ends at the lower side of the component 23. The collecting chamber for a plurality of residual mandrels 18 is arranged on the lower side of the component 23.
Number | Date | Country | Kind |
---|---|---|---|
10 2010 039 670 | Aug 2010 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2011/064453 | 8/23/2011 | WO | 00 | 3/13/2013 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2012/025519 | 3/1/2012 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
3082898 | Bosch | Mar 1963 | A |
5473805 | Wille | Dec 1995 | A |
5778516 | Dear et al. | Jul 1998 | A |
6163945 | Amano et al. | Dec 2000 | A |
6276037 | Solfronk | Aug 2001 | B1 |
6883216 | Gilbert et al. | Apr 2005 | B2 |
Number | Date | Country |
---|---|---|
201431990 | Mar 2010 | CN |
3851521 | Feb 1995 | DE |
0130040 | Jan 1985 | EP |
6328182 | Nov 1994 | JP |
1299698 | Mar 1987 | SU |
Number | Date | Country | |
---|---|---|---|
20130205556 A1 | Aug 2013 | US |