Drawer pull-out guide fitting with improved height adjusting cam

A pull-out guide fitting for a drawer, having two drawer frames (2) to which a respective pull-out rail (6) of the two pull-out rails (6) and a drawer guide fitting comprising two carcass-side support rails (5) is detachably secured. Each pull-out rail (6) has in the region of its rear end a hook by means of which it can be suspended in the drawer. There are provided, projecting transversely with respect to the pull-out direction of the pull-out rails (6), latching parts (9) which fix the pull-out rail (6) to the drawer frame (2) in the direction of displacement of the drawer guide fitting. There is assembled on the pull-out rails (6) a cam body (1) which is rotatable about a horizontal axis and on which the drawer bears. The cam body (1) is mounted in a cutout (4) in the upper horizontal web (6') and the drawer base (3) bears on the cam body (1).

The invention relates to a pull-out guide fitting for a drawer having two 
drawer frames to each of which one pull-out rail of the two pull-out rails 
and a pull-out guide fitting comprising two carcass-side support rails is 
detachably secured, each pull-out rail having at its rear end a hook or 
the like by means of which it can be suspended in the drawer, and there 
being provided latching parts which project or are movable transversely 
with respect to the pull-out direction of the pull-out rails and which fix 
the pull-out rail to the drawer frame in the direction of displacement of 
the pull-out guide fitting, there being mounted on the pull-out rails, 
which have a lower and an upper horizontal web, a cam body which is 
rotatable about a horizontal axis and on which the drawer bears. 
The invention relates in particular to drawers having drawer guide fittings 
in which the pull-out rails and the support rails are not separable. 
Generally, the roller parts are mounted in carriages in the case of such 
drawer guide fittings. 
According to the prior art, two types of drawer guide fittings are known in 
which the rollers are not directly secured to one of the rails but are 
located in a separate carriage. The most well-known of these are the 
so-called ball castor drawers, the transmission of load between the rails 
being effected by means of steel balls which are held in a carriage 
constructed as a ball cage. 
The other type of pull-out guide fittings has only recently come onto the 
market and has cylindrical rollers, of the same type as are normally 
directly mounted on the rails. These rollers, like the balls, are held in 
a carriage. The carriage itself does not transmit any forces. 
Drawers and pull-out guide fittings have become known, in which it is 
possible to mount the pull-out guide fitting completely, i.e. with the 
pull-out rail or rails, in the furniture carcass and subsequently to 
suspend the drawer. 
These embodiments also make it possible to remove the drawer simply, for 
example in order to clean it. 
Examples of this are disclosed in AT-PS 384 535 and DE-GM 89 03 741. 
DE-GM 82 28 143 discloses a pull-out guide fitting having a height 
adjustment means. Here, the drawer side walls have to have holes, which 
necessitates an additional operation. If the drawer is used with a 
pull-out guide fitting having no height-adjusting device, the holes have a 
disruptive effect. 
The object of the invention is to make it possible to adjust the width of 
the horizontal joins in such drawers without the drawer side walls having 
to be altered. 
The object according to the invention is achieved in that the cam body is 
mounted in a cutout in the upper horizontal web and the drawer base bears 
on the cam body. 
The pull-out guide according to the invention makes it easy to adjust the 
height of the drawer in order either to straighten it or to compensate the 
joins between the drawers arranged one on top of the other in the 
furniture carcass. Here, the height-adjusting device is restricted in its 
construction to the pull-out guide. 
Advantageously, it is provided that the pull-out rails have a lower and an 
upper horizontal web, and in that the cam body is mounted in a cutout of 
the upper horizontal web. As a result, the cam body can be rotated 
completely below the horizontal web, so that the drawer, should no height 
adjustment be necessary, bears snugly against the horizontal web of the 
pull-out rail. 
A further embodiment of the invention provides for the cam body to be 
provided with a handle part having latching pegs, which handle part is 
guided along an arcuate toothed rack-like latching strip. In this manner, 
the height adjustment of the drawer can be effected without using a tool. 
The peg and the toothed rack-like latching strip make it possible to 
securely lock the cam body in any desired position. 
An example embodiment of the invention will be described below with 
reference to the attached drawings.

The drawer according to the invention comprises, in conventional manner, 
the two drawer frames 2, a drawer rear wall, the drawer base 3 and a front 
panel. 
The drawer frames 2 are advantageously produced from a wood material, for 
example chipboard, but can also be produced from plastics. Each drawer 
frame 2 has a portion 13 which projects downwards beyond the drawer base 3 
of the drawer. 
Each pull-out rail 6 has an upper and lower horizontal web 6', a continuous 
vertical web 6" on one side which connects the two horizontal webs 6', and 
a marginal web 6'" on the other side. 
At the back, each pull-out rail 6 is provided with a hook which on assembly 
engages directly in an opening in the drawer rear wall or in the drawer 
frame 2. 
Each pull-out rail 6 is located exactly in the corner between the drawer 
base 3 and the drawer frame 2, in particular below the drawer base 3. A 
cutout 12 is located on the inside of the drawer. A latching part 9 which 
is mounted on each pull-out rail 6 is located at the same height (in the 
case of a drawer assembled on the pull-out rails 6). The latching part 9 
in the example embodiment is welded to the pull-out rail 6, but can also 
be mounted movably thereon. 
The cutout 12 is open to the bottom. In order to anchor the drawer the 
latter is placed onto the pull-out rails 6 and pushed back. 
In the example embodiment, the cam body 1 is mounted next to the cutout 12 
and the latching part 9 in the pull-out rail 6. The cam body 1 is located 
in a cutout 4 in the upper horizontal web 6' of the pull-out rail 6 and 
extends approximately over the entire width of the pull-out rail 6. 
The drawer bears by means of the drawer base 3 directly on the cam body 1. 
In its lowermost position, the cam body 1 ends flush with the upper 
horizontal web 6' of the pull-out rail 6. 
The cam body 1 is rotatable by way of a handle part 15. The handle part 15 
is located in the region of the vertical web 6'" of the pull-out rail 6. 
The cam body 1 is mounted in a type of frame 7 which is placed onto the 
pull-out rail 6. 
A latching peg 8 is located on the handle part 15, and the frame is 
provided with an arcuate toothed rack-like latching strip 10, so that the 
cam body 1 can be adjusted in steps and is held in any position in which 
the latching peg 8 latches in a notch 11 of the latching strip 10. 
A cam body 1 is advantageously provided on each side of the drawer. 
In the example embodiment according to FIGS. 5 and 6, there is provided 
instead of the toothed rack-like latching strip 10 in FIG. 1 in the 
marginal web 6'" of the pull-out rail 6 an arcuate row 14 of holes which 
is formed by slot-shaped holes 14'. A projection of the handle part 15, 
when the handle part 15 is rotated, latches in steps in these slot-shaped 
holes 14'. Conversely, instead of the slot-shaped holes 14' studs which in 
turn latch in a corresponding cutout in the handle part 15 could of course 
also be provided in the marginal web 6'" . The row 14 of holes and the 
projection on the handle part 15 enable the cam body 1 in turn to be 
locked in different intermediate positions. 
FIG. 5 shows the cam body 1 and the drawer base 3 in the lowermost 
position, which is also termed the so-called factory setting. The pull-out 
guide fitting is supplied with the cam body 1 in this position and is 
assembled on the carcass side wall 2, after which the drawer is placed 
onto the pull-out guide fittings. 
FIG. 6 shows the cam body 1 in the position of maximum height compensation. 
The same position of the cam body 1 is shown in FIG. 4. 
In the figures of the drawing, the carcass-side support rail is designated 
5. The carriage or rollers or sliders which are arranged between the 
pull-out rail 6 and the support rail 5 are not indicated.