Cabinet with at least one withdrawable part

Abstract

A cabinet having a withdrawable drawer (2) and a rope (7) attached thereto for relieving upper and lower guides (4, 5) for the drawer from stresses. The rope is led around rollers (6b, 6c) on a lower relief rod (6) which is displaceably guided in the lower guide and itself forms a guide on which the drawer is displaceable. An upper relief rod (3) is displaceable in the upper guide.

Description

This invention relates to a cabinet comprising at least one withdrawable part such as a pivotable frame section for carrying sheetshaped objects such as drawings, maps or the like, said cabinet further comprising one upper and one lower guide for the part, wheels or rollers interacting with the guides and facilitating withdrawal of the part, and means for partly relieving the guides from stresses upon withdrawal of the part, said means comprising a rope which is led around rollers located at the upper and lower inside edge of the frame of the cabinet.

Swedish patent 221,805 and Swiss patent 469,460 describe cabinets of this kind which, however, are not quite satisfactory especially when the withdrawable part is heavy.

One object of the present invention is to substantially relieve the stresses acting on the guides in the withdrawn position of the withdrawable part and still guide the part in a satisfactory manner.

In accordance with the invention this object is fulfilled in that a rope is led around at least two rollers which are carried on a lower relief rod, the relief rod being displaceably guided in the lower guide and itself forming a guide on which the withdrawable part is displaceable.

Due to the fact that the rope is led around the rollers on a lower relief rod a substantial relieving of the stresses is achieved. Further, a better guidance of the withdrawable part has been accomplished so that it is possible to have it withdrawn fully outside of the cabinet without any problems in pushing it back again. This is of special advantage when the withdrawable part comprises a storage frame provided with a pivotable frame section which is filled with stored objects such as drawings. Handles on adjacent storage frames will then not undesirably form an obstacle to pivotable frame parts when they are swung to horizontal positions.

Another advantage is that in the withdrawn position of the withdrawable part access to the rope is accomplished in an easy way so that it is not necessary to disconnect the whole cabinet if the rope has to be loosened or lightened.

Further distinguishing features and advantages of an improvement according to the invention will become apparent from the following description of an embodiment thereof, wherein reference is made to the accompanying drawings.

FIG. 1 is a perspective view of a cabinet provided with a number of withdrawable storage frames.

FIG. 2 is a section through a storage frame for a cabinet according to FIG. 1.

FIG. 3 is a perspective view of a storage frame and appurtenant cabinet guides, showing the storage frame in the withdrawn position.

FIGS. 4-7 are sections along the lines 4--4, 5--5, 6--6 and 7--7 in FIG. 3.

A cabinet 1 is provided with a number of withdrawable storage frames 2. Each and every one of these is preferably provided with a pivotable frame section (not shown) for carrying objects such as drawings, maps or the like. The pivotable frame section is then swingable between a horizontal position in which convenient handling of the stored objects can take place and a vertical position in which the objects are held closely packed, suspended one under another.

The withdrawable frame section 2 interacts with an upper guide 4 located in the cabinet and a lower guide 5. Carried in the lower guide 5 is a roller 5a, against which rests a relief rod 6 which is displaceable in relation to both the lower guide 5 and the frame 2. Mounted on either side in the inner end of the relief rod 6 is a roller 6a, which runs in the guide 5. Mounted on either side in the outer end of the relief rod, which is inserted in a sectional part 2" serving as a guide and belonging to the frame 2, is a roller 6d.

Also mounted in the lower relief rod 6 are two rollers 6b and 6c, respectively, which rollers are provided with peripheral grooves and whose function will be explained hereinafter.

Located in the upper guide 4 is an upper relief rod 3 which is displaceable both in relation to the guide 4 and in relation to the frame 2. The outer end of the upper relief rod 3 forms part of an upper sectional part 2' serving as a guide and belonging to the frame 2. Carried in the uppeer relief rod 3 are rollers 3a, these rollers being rotatable around horizontal shafts and engaging against the sectional part 2'. Also mounted in the relief rod 3 are rollers 3b, these rollers being rotatable around vertical shafts, one of them engaging with one vertical side 4a of the guide 4 while the other engages with its other vertical side 4b. Alternatively, both rollers 3b can have such a diameter that they engage with both of the vertical sides 4a, 4b.

Mounted at the top of the inner edge of the frame 2 is a roller 2a and at the bottom a roller 2b. These rollers are provided with peripheral grooves and serve as relinking rollers for a rope 7, which at 8 is attached to the cabinet 1 in the area of the inner end of the upper guide, the other end of the said rope being attached at 9 in the area of the middle section of the lower guide 5. Via the rollers 2a and 2b, the rope is carried over a relinking roller 6b in the area for the front end of the lower relief rod 6 and a further relinking roller 6c in the area for the inner end of the rod. By means of a rope tensioner 7a, the wanted tension in the rope can be obtained.

The arrangement of the rope 7 and the relief rods brings about a substantial relieving of the torque which would otherwise be exerted by the frame 2 against the guides 4 and 5 when the frame is in its withdrawn position.

Appropriately located stop means 9 and 10 prevent the lower and upper relief rods, respectively, from being displaced too far outwards in relation to their guides.

A relieving device according to the invention facilitates withdrawal and insertion of the frame 2 from and into the cabinet. In the withdrawn position of the frame such substantial relieving of the stresses is achieved that damage to the cabinet does not need to be encountered even if somebody should idadvertently allow the weight of his body to rest against the frame section in its withdrawn position.

Claims

What I claim is:

1. In a filing cabinet including at least one withdrawable drawer (2) such as a pivotable frame section for carrying sheet-like objects such as drawings, maps, or the like, upper and lower guide members (4,5) for the drawer, rollers interacting with the guide members for facilitating the withdrawal of the drawer, first and second pulleys (2a, 2b) respectively mounted to the upper and lower inside edges of the drawer, and a rope lead around the first and second pulleys, improved means for partially relieving the guide members from stresses upon the withdrawal of the drawer, characterized by:

a. a lower relief rod (6) longitudinally displacable in the lower guide member,

b. the drawer, in turn, being longitudinally displacable on the lower relief rod,

c. third and fourth pulleys (6b, 6c) respectively mounted in a spaced relationship to the lower relief rod, the third pulley being closer to the outer end of the rod and the fourth pulley being closer to the inner end of the rod,

d. the rope, after leaving the second pulley, being lead forward to and around the third pulley and then back to and around the fourth pulley,

e. one end of the rope being attached to the cabinet adjacent the upper guide member and the other end of the rope being attached to the cabinet adjacent the lower guide member, and

f. rollers (6d) mounted on the lower relief rod and engaging with a lower sectional part (2") serving as a guide and belonging to the drawer, whereby the outer end of the lower relief rod constitutes a movable fulcrum for the drawer which is extendable therewith as the drawer is withdrawn, the lower relief rod being so extended by the rope acting on the pulleys.

2. A cabinet as claimed in claim 1, wherein a roller (6a) is mounted at the inner end of the relief rod.

3. A cabinet as claimed in claim 1, wherein the relief rod rests on a roller (5a) mounted at the outer end of the lower guide member.

4. A cabinet as claimed in claim 1, wherein the upper guide member interacts with an upper relief rod (3) which is longitudinally displaceable relative to the upper guide member and to the drawer and in which rollers (3a) are carried for engagement with the drawer.

5. A cabinet as claimed in claim 4, wherein the rollers engage with an upper sectional part (2') serving as a guide and belonging to the drawer.

6. A cabinet as claimed in claim 4, wherein the upper relief rod is provided with rollers (3b) rotatable around vertical axes and engagable with the upper guide.