Sliding Drawer For Tables And Office Desks

Abstract

A sliding drawer for tables and office desks adapted to be secured upon the lower surface of the desk plate, comprising two guiding section irons disposed between the drawer and the desk plate, the two guiding section irons being sliding with respect to the drawer and the desk plate. The drawer is secured upon the desk plate by means of two pairs of expansion bolts locked in blind holes of the desk plate. Each of the expansion bolts pairs is inserted into an opening of the guiding section irons so as to support and to allow the sliding motion of the drawer.

Description

CROSS-REFERENCE TO RELATED APPLICATION

Applicant claims priority from the corresponding Italian Utility Model Application, Ser. No. 52907-B/72, filed Feb. 14, 1973.

BACKGROUND OF THE INVENTION

The present invention relates to a sliding drawer for tables and office desks, adapted to be secured upon the lower surface of the desk plate, comprising two guiding section irons on the drawer sides and slidable with respect to the desk plate and with respect to the said drawer.

Some drawer types are known the securing operation whereof upon the desk plate is carried out by guides inserted into grooves provided on the drawer sides. These guides require a certain precision degree in the manufacturing operations in order to obtain a satisfactory sliding motion of the drawer whereby such guiding means generally results in being relatively expensive.

SUMMARY OF THE INVENTION

The present invention provides a sliding drawer which is secured upon said desk plate by means of two pairs of expansion bolts locked in blind holes of said plate, each of said pairs of expansion bolts being inserted into an opening of said guiding section irons so as to support and to allow the sliding motion of said drawer.

A preferred embodiment of the invention is illustrated by way of example by the following description and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial sectional perspective view of a desk plate with a stationary carrying drawer according to the model;

FIG. 2 is a side sectional view of the drawer;

FIG. 3 is a detail of the drawer.

DETAILED DESCRIPTION OF THE INVENTION

The drawer, which is generically designed by 50 (FIG. 1), is particularly of the stationary carrying type and is made of a single part of plastic material. The drawer is divided inside into a first section 1 and into three other sections 2 which are smaller than the previous one. The drawer is made of a bottom 3, a front wall 4, a rear wall 6 and side walls 7 divided so as to build up a chamber 8 on each drawer side.

Each of the two chambers 8 is divided transversely by a vertical wall 9 (FIG. 2) and by a horizontal wall 11 provided with two horizontal guiding slits 16 (FIG. 1). In this way three inclosures are built up, a first guiding inclosure 12 (FIG. 2) located on the top side of the drawer and two inclosures 13 and 14 located on the lower side of the drawer.

Sliding in the two slits 16 of each wall 11 are two guiding pins 17 and 18 secured by rivets upon a lower wall of a section iron 19 housed in the guiding inclosure 12. The section iron 19 has a section substantially rectangular having an upper wall provided with a longitudinal slit 38 (FIG. 1). The section iron 19 (FIG. 2) may slide with respect to the drawer through a first stroke being equal to the length of the two longitudinal slits 16. Both guiding pins 17 and 18 are provided with a ring shaped groove 21. Inserted into the ring shaped groove 21 of the guiding pin 17 is a rubber ring 22.

The stationary carrying drawing is secured upon a wooden plate 23 (FIG. 1) of the desk, by means of two pairs of expansion bolts indicated generically by 24 (FIG. 3). The expansion bolt 24 is made of a metal portion comprising a screw 29 and an head comprising an enlarged portion or a thumb knob 26, a pin 27, and a flange 28. Located about the screw 29 an expansible sleeve or is a rubber cylinder 31, while screwed on the same screw is a nut 32 pressing on a flange 34 located between the cylinder 31 and the nut 32 and being provided with two turned over lugs building up two triangular teeth 33 (FIG. 1), which grasp the nut so as to prevent its rotation with respect to the flange 34.

The expansion bolts 24 are inserted into the blind holes 36 of the plate 23 (FIGS. 1 and 2), driving the teeth 33 into the end of the hole 36 and thus locking the nut 32 against the rotation. The locking operation of the expansion bolt 24 is executed by turning the knob 26 thus causing the screw 29 to be screwed into the nut 32 and the rubber cylinder 31 to be expanded.

The knobs 26 have the object to support the drawer and are inserted, by pairs, unto the section iron 19 (FIG. 1). The slit 38 of the section irons 19 has a length which is slightly larger than the diameter of the pin 27 (FIG. 3) and the internal width of the guiding means 19 is slightly larger than the diameter of the knob 26, so that the guides 19 are able to slide with respect to the knobs 26.

One end 39 of the section iron 19 is closed by a plastic locking member 41, in order to prevent the knobs 26 from being taken out from the front side. The other end 42 of the section irons 19 is slightly embossed on to side walls 43 (FIG. 1) so that the width of the section iron 19 is slightly smaller than the diameter of the knobs 26 on said end portion 42.

The assembling of the drawer 50 first requires that the expansion bolts 24 are locked into the corresponding holes 39 and then that the knobs 26 are inserted inside the section irons 19 through the end portion 42 by forcing the embossed portions 43 by a moderate manual pressure. The embossed portions 43 prevent the drawer from being taken out when normally used. For taking out the drawer it is thus required to overcome the resistance opposed by the embossed portions 43 against the extraction of the knobs 26.

The section iron 19 is capable of sliding with respect to the pins 27 through a second stroke which is equal to the difference between the length of the same section iron 19 and the separation existing between the two knobs 26. This sliding travel, added to the one recited sliding travel between the section iron 19 and the drawer 50, allows the drawer to open and close completely.

The inclosure 13 (FIG. 2) has dimensions which are slightly smaller than the adjacent one 14, this causing the rubber member 22 to strike against the wall 6 when the drawer is opened, thus damping the impact on the rear wall 6. The separation between the rubber member 22 and the vertical wall 9 is longer than the one existing between the locking member 41 and the front wall 4. Therefore, it is the locking member 41 which damps the impact on the front wall 4 of the drawer 50 when the latter is closed.

Claims

What I claim is:

1. A sliding drawer device for tables and office desk comprising a desk plate having a top surface and a bottom surface, said bottom surface housing two pairs of reciprocally parallel blind holes, a drawer assembly including a drawer having two side walls, two guiding section irons, means connecting said side walls to said two guiding sections irons below said two pairs of holes and parallel thereto, respectively, and two pairs of expansion bolts inserted in said blind holes, each of said irons including an upper wall defining a longitudinal slit, and said pair of expansion bolts including a first flange, a screw connected to said first flange, an expandable sleeve surrounding said screw, and a head joined to said screw for compressing said sleeve against said first flange for locking said expandable sleeve in said hole, said head comprising a second flange contacting said bottom surface of said desk plate, a pin projecting from said second flange, and slidably engaging the slit below the upper wall of said section irons and an enlarged portion for slidably guiding said upper wall between said second flange and said enlarged portion of said head to enable the sliding motion of said drawer with respect to said desk plate.

2. A sliding drawer device according to claim 1, wherein said connecting means includes a pin and slot connection comprising two pairs of guiding pins secured to said second irons and two other walls of said drawer connected to said two side walls, each of said other walls having a guiding slit thereon engaging said guiding pins for slidably guiding said section irons with respect to said drawer.

3. A sliding drawer device according to claim 2 wherein said section irons have a substantially rectangular cross section and each of said side walls includes two vertical walls, each of said other walls comprising a horizontal wall connecting said two vertical walls to define a housing on which said section irons are located.

4. A sliding drawer assembly for tables and office desk of the type including a plate having a top surface and a bottom surface, said bottom surface including two pairs of blind holes aligned in two parallel rows, two pairs of expansion bolts locked in said blind holes, a sliding drawer comprising a bottom wall and two side walls perpendicular to said bottom wall, each of said side walls including two vertical walls and a horizontal wall interconnecting said two vertical walls to define an upper enclosure and a lower enclosure, said horizontal wall including two horizontal slits, two guiding section irons, two guiding pins fixed to said section irons and each engaged in one of the two horizontal slits for guiding each one of said section irons on said upper enclosure through a first stroke substantially equal to the length of said horizontal slits, said section irons being provided with two corresponding longitudinal slits each slidably engaged by one pair of said expansion bolts for slidable movement with respect to said desk plate through a second stroke, said first and said second strokes enabling said drawer to be completely extracted from said plate.