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| 1. | A trestle comprising a support adjustable in vertical direction in a stand and legs attached to the stand, c h a r a c t e r i z e d i n that the legs (5) are attached pivotally to the stand (1) for pivoting from a foldedout position, in which they support the trestle in operative position, and in which a locking ring (10) locks the legs (6) against unintentional foldingin movement, to a foldedtogether position, in which the legs are subst¬ antially in parallel with the support (2,3). |
| 2. | A trestle as defined in claim 1, c h a r a c t e r i z e d i n that the legs (5) at their end portion remote from the ground are provided with tongues (9), which in foldedout position of the legs abut the. stand (1) as a support taking up loads. |
| 3. | ' A trestle as defined in claim 1 or 2, c h a r a c t e r ¬ i z e d i n that said locking ring '(10) .is movable about the .stand (1) . |
| 4. | A trestle as defined in claim 3, c h r a c t e r i z •e d i n that, the locking ring (10) in its locking posit¬ ion is locked against movement by a cotter (4) locking the support (2, 3) to the stand and by the tongues (9) of the Isgs which the locking ring in its lockingo p_rosition encloses'. |
| 5. | A trestle as defined in any one of the preceding claims, c h a r a c t e r i z e d' i n that the legs have substant¬ ially Ushaped crosssection and are supported at the stand (1) each by a dowel (8). |
| 6. | A trestle as defined in claim 5, c h a r a c t e r i z e d i n that the stand (1) has the form of a sleeve with outside bearing bushings for the dowels (8) pivotally suppor ing the legs (6) . |
| 7. | A trestle as defined in any one of the. claims 1 3, c h a r a c t e r i z e d i n that between the locking ring (10) and each of the legs (6) a link is hingedly conn¬ ected for taking up the load in the operative position of the trestle. |
| 8. | A.trestle. as defined in claim 7, c h a r a c t e r i z e d i n that a stop shoulder (17) is located on the stand for the locking ring (10), which shoulder is located so in vertical direction that it': stops the locking ring when the hinge point of the links at the locking ring is located in or beneath a plane through the hinge point of the links at the legs (6). |
This invention relates to a trestle, which comprises a supp¬ ort vertically adjustable in a stand, and legs attached to the stand.
Trestles knowingly are utilized for supporting objects of various kind, and especially for trestling cars which, for example, are to be repaired or the tires of which are to be exchanged, and also for trestling cars when they are to be sto.red for longer periods. The trestles, in order to be expedient, must be constructed so that they do not tend to turn over, but stand very firmly on -heir support. For this purpose, the known trestles are provided with at least three projecting legs, which are welded on the trestle stand. The leg end portions, which are posit-ioned in the base plane and normally provided with footplates, are located at a relati¬ vely great distance from the vertical centre line of the stand. Due to their projecting legs, however, known trestles require very much space and, therefore, are difficult to store and definitely unsuitable to be taken along, for ex¬ ample in the luggage compartment of a car.
The present invention, therefore, has the object to eliminate this disadvantage of known trestles. This object is achieved in that the trestle according to the invention has been given the characterizing features defined in the attached claims , viz. in principle that the legs are attached pivotall v to the stand so as from their projecting position, in which they support the trestle in operative position, to be pivoted to a folded-in position, in which the legs substantially are in
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parallel with the stand and support of the trestle, and a locking ring is arranged so as to lock the legs against unintentional fόlding-in movement when the trestle is in operative position.
The invention is described in greater detail in the follow¬ ing, with reference to the accompanying drawings, in which Fig. i is a view of the present trestle in operative pos¬ ition with projecting legs, Fig. 2 is a view of the same trestle with folded-in legs, Fig. 3 shows an alternative embodiment, and Fig. •+ is a section substantially along the line IV-IV in Fig. 3.
The trestle according to the present invention comprises a stand '1 in the form of a sleeve, in which a support 3 is located which is provided with a carrying plate 2. Said support 3 is movable in longitudinal direction in the stand i and, thus, can be adjusted to different height positions.- The support 3, furthermore, for being locked relative to the stand 1 in its adjusted height position is provided with " a plurality of spaced holes, into which a cotter -4 inserted through holes in the stand 1 can be introduced. Said cotter preferably is connected to the stand 1 by a chain 5 or the like.
The present trestle further comprises a number of legs 6, which are attached to the stand 1. Each leg is provided at .its end remote from the stand 1 with a footplate 7. The legs as ' shown have substantially -U-shaped cross-section, the oper. side facing to the stand * .
The legs 6 are attached pivotally to the stand by dowels 8, which are supported each by a bearing bushing (not shown) located on the outside of the stand. Each leg 6 is formed above its pivot point with a slightly outward bent supportin tongue 9, which is capable to limit the outward swing move-*
m.ent or outward folding of its leg to projecting position, in which the trestle in operative position is supported, which position is shown in Fig. 1 and determined by the supporting tongue of the respective leg.
In operative position of tne trestle, thus, the supporting tongues 9 of the folded-out legs abut the stand 1. When the trestle is loaded, the supporting tongues 9, thus, are add¬ itionally pressed against the stand 1. Hereby a locking of the legs in folded-out position is obtained, but as this locking depends on the size of the load, an additional locking is provided which has the form of a locking ring 10, which is movable about the stand 1 and renders it imposs¬ ible that the legs unintentionally are folded in when the trestle is in operative position. The locking ring 10, more precisely, in its locking position as shown in Fig. 1 encloses the locking tongues 9 of the legs which abut the stand and take up the load and locks said tongues"against the stand. The ' locking ring, furthermore, in its locking position is prevented from moving relative to the stand 1 both by the cotter 4 and by the legs 6, as appears from ' Fig. 1 .
For folding together the present trestle, the locking ring 10 subsequent to the removal of the cotter 4 is moved to the carrying plate 2 until the tongues 9 are entirely released, -Thereafter the legs 6 can be folded in to a position substant¬ ially in parallel with the stand, in which position the legs then are locked in that the locking ring 10 again is moved against the supporting tongues 9 of the legs ' and the cotter 4 is inserted in suitable holes in the stand 1 and support 2, which in folded-together position of the trestle, which is the position suitable for transport and storage, prefer¬ ably is inserted entirely in the stand 1.
A modified embodiment of the present trestle is shown in Figs.
3 and 4, in which the reference numerals used are the same as for corresponding details in Figs , 1 and 2. The modified embodiment differs from the one shown in Figs. 1 and 2 espe ially in that the locking ring 10 is arranged movable about the stand 1 between the stand end portion facing to the ground and the.pivot point 8 of the legs at the stand. The locking ring 10 is provided . with projecting fastening lugs 12 corresponding in number to the legs 6, which lugs by means of a stud 13 or rivet are hingedly connected each to a link ' 14 extending radially outward from the stand 1. Said links are hingedly connected at their other end each with a leg 6 by means of a stud 15 secured in the leg 6 with U-shaped cross-section. On both sides of the link 14 dist¬ ance sleeves 16 are located in order to maintain the links 14 substantially radially directed and to prevent them from moving in lateral direction on the respective stud 15. Tne links 14 may be connected to respective distance sleeves 16
For folcing-out the legs 6 , the locking ring 10 is moved downward until it is stopped against a stop edge 17 attache to the end of the stand. Said stop edge 17 shall be located so in vertical direction that the studs 13 of the links are located in or beneath a plane through the other studs 1 of the links when the locking ring 10 abuts the stop edge 1 ' and the legs 6 are in outward pivoted position. Hereby the -locking ring prevents unintentional inward pivoting of the legs 6 'when the trestle is in operative position. In operat position of the trestle, thus, loads are taken up by the links 14 and the locking ring 10 located about the stand 1.
The present invention is. not restricted to the embodiments described above and shown in the drawings , but can be alter modifi £ d and completed in many different ways within the scope of the invention idea defined in the attached claims.
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