DE217515C - - Google Patents
Info
- Publication number
- DE217515C DE217515C DENDAT217515D DE217515DA DE217515C DE 217515 C DE217515 C DE 217515C DE NDAT217515 D DENDAT217515 D DE NDAT217515D DE 217515D A DE217515D A DE 217515DA DE 217515 C DE217515 C DE 217515C
- Authority
- DE
- Germany
- Prior art keywords
- spiral
- spring
- upper frame
- spiral spring
- action
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002965 rope Substances 0.000 claims description 4
- 230000003247 decreasing Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims 1
- 230000001447 compensatory Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B27/00—Drawing desks or tables; Carriers for drawing-boards
- A47B27/14—Adjustable underframes
Landscapes
- Straightening Metal Sheet-Like Bodies (AREA)
Description
Die Erfindung betrifft einen in der Höhe verstellbaren Zeichentisch mit Gewichtsausgleich durch Federwirkung. Das Neue an ihm ist, daß die Ausgleichwirkung der Feder in jeder Stellung des Obergestelles die gleiche ist.The invention relates to a height-adjustable drawing table with weight compensation by spring action. What is new about him is that the compensatory effect of the spring in every position of the upper frame is the same.
Auf der Zeichnung ist der Erfindungsgegenstand dargestellt, und zwar zeigen:The subject of the invention is shown in the drawing, namely show:
Fig. ι einen senkrechten Schnitt durch den Zeichentisch,Fig. Ι a vertical section through the drawing table,
ίο Fig. 2 die Seitenansicht eines Teiles des Untergestelles,ίο Fig. 2 is a side view of part of the Underframe,
Fig. 3 eine Draufsicht auf das Untergestell.Fig. 3 is a plan view of the underframe.
Zwischen den Seitenteilen des festen Untergestelles α ist, in Nuten u geführt, das Obergestell b verstellbar angebracht, welches den um eine horizontale Achse υ drehbaren Rahmen c zur Aufnahme des Reißbrettes trägt. Im Untergestell ist eine zwei Seilscheiben i, eine Spiralfeder h und ein Zahnrad d tragende Welle w gelagert. Die Spiralfeder h ist mit ihrem inneren Ende an der Welle w, mit dem äußeren Ende an dem Gestellfuß befestigt. Auf dem Mantel der stumpf kegelförmigen Seilscheiben i ist je eine Rille s spiralförmig eingeschnitten, in welche sich das am äußeren Rande der Scheibe befestigte Zugseil I entsprechend der Auf- oder Abwärtsbewegung des Obergestelles auf- oder abrollt.Between the side parts of the fixed underframe α , guided in grooves u , the upper frame b is adjustably attached, which supports the frame c rotatable about a horizontal axis υ for receiving the drawing board. A shaft w carrying two pulleys i, a spiral spring h and a gear wheel d is mounted in the underframe. The inner end of the spiral spring h is fastened to the shaft w and the outer end to the frame foot. On the jacket of the truncated cone-shaped pulleys i , a groove s is cut into each spiral, into which the pull rope I attached to the outer edge of the pulley rolls up or down according to the upward or downward movement of the upper frame.
Durch einen durch eine Feder g hochgehalteneh Fußtritthebel f und einen auf ihn sitzenden Einschnappbolzen e kann das Zahnrad d und damit zugleich die Welle w mit der Seilscheibe i in beliebiger Stellung festgestellt oder aus ihrer Feststellung befreit werden.By means of a foot pedal f held up by a spring g and a snap-in bolt e seated on it, the gear wheel d and thus at the same time the shaft w with the pulley i can be locked in any position or released from its locking position.
Bei mäßig straff angespannter Spiralfeder h befindet sich das Obergestell b in seiner höchsten Stellung.When the spiral spring h is moderately tensioned, the upper frame b is in its highest position.
Beim Herabdrücken des Obergestelles b rollt sich das Zugseil I von der kegelförmigen Seilscheibe i, der Rinne s folgend, ab, so daß bei größer werdender Spannkraft der Feder h auch der Radius der wirkenden Seilscheibe größer wird. Beim Hochschieben des Obergestelles rollt sich das Zugseil I wieder auf die Seilscheibe auf, so daß entsprechend der geringer werdenden Spannkraft der Spiralfeder h der Radius der wirkenden Seilscheibe kleiner wird. Auf diese Weise wird eine in allen Stellungen des Obergestelles sich gleichbleibende Ausgleichungswirkung erzielt.When the upper frame b is pressed down, the pull rope I rolls off the conical pulley i, following the channel s, so that as the tension force of the spring h increases , the radius of the active pulley also increases. When the upper frame is pushed up, the pull rope I rolls up again on the sheave, so that the radius of the active sheave becomes smaller in accordance with the decreasing tensioning force of the spiral spring h. In this way, a compensating effect that remains the same in all positions of the upper frame is achieved.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE217515C true DE217515C (en) |
Family
ID=478811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT217515D Active DE217515C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE217515C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1082714B (en) * | 1958-01-17 | 1960-06-02 | Schmidt & Haensch Franz | Installation on drawing tables equipped with a height-adjustable drawing board or other height-adjustable devices |
DE1170124B (en) * | 1954-08-17 | 1964-05-14 | Friedrich Bong | Spring force weight compensation for a sliding blackboard |
DE3740561A1 (en) * | 1986-12-01 | 1988-07-21 | Canon Kk | MOVABLE OBJECT RECEIVER |
US8091841B2 (en) | 2004-12-17 | 2012-01-10 | Steelcase Inc. | Load compensator for height adjustable table |
DE102010060153B3 (en) * | 2010-10-25 | 2012-02-02 | Veyhl Gmbh | Pivotable shaft arrangement for supporting device of e.g. seating furniture, has multiple winding sections axially arranged one after another on rotary shaft and comprising different cross-sections |
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0
- DE DENDAT217515D patent/DE217515C/de active Active
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1170124B (en) * | 1954-08-17 | 1964-05-14 | Friedrich Bong | Spring force weight compensation for a sliding blackboard |
DE1082714B (en) * | 1958-01-17 | 1960-06-02 | Schmidt & Haensch Franz | Installation on drawing tables equipped with a height-adjustable drawing board or other height-adjustable devices |
DE3740561A1 (en) * | 1986-12-01 | 1988-07-21 | Canon Kk | MOVABLE OBJECT RECEIVER |
US8091841B2 (en) | 2004-12-17 | 2012-01-10 | Steelcase Inc. | Load compensator for height adjustable table |
US9591920B2 (en) | 2004-12-17 | 2017-03-14 | Steelcase Inc. | Load compensator for height adjustable table |
US9826825B1 (en) | 2004-12-17 | 2017-11-28 | Steelcase Inc. | Load compensator for height adjustable table |
US9913532B1 (en) | 2004-12-17 | 2018-03-13 | Steelcase Inc. | Load compensator for height adjustable table |
US10051955B1 (en) | 2004-12-17 | 2018-08-21 | Steelcase Inc. | Load compensator for height adjustable table |
US10420417B1 (en) | 2004-12-17 | 2019-09-24 | Steelcase Inc. | Load compensator for height adjustable table |
DE102010060153B3 (en) * | 2010-10-25 | 2012-02-02 | Veyhl Gmbh | Pivotable shaft arrangement for supporting device of e.g. seating furniture, has multiple winding sections axially arranged one after another on rotary shaft and comprising different cross-sections |
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