EP0399963A1 - Rolladen für Zeichenbrett - Google Patents

Rolladen für Zeichenbrett Download PDF

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Publication number
EP0399963A1
EP0399963A1 EP90830223A EP90830223A EP0399963A1 EP 0399963 A1 EP0399963 A1 EP 0399963A1 EP 90830223 A EP90830223 A EP 90830223A EP 90830223 A EP90830223 A EP 90830223A EP 0399963 A1 EP0399963 A1 EP 0399963A1
Authority
EP
European Patent Office
Prior art keywords
guard body
roller
blind
fixed
blind screen
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.)
Withdrawn
Application number
EP90830223A
Other languages
English (en)
French (fr)
Inventor
Gianluigi Traspadini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ito Di Traspadini Gianluigi
Original Assignee
Ito Di Traspadini Gianluigi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ito Di Traspadini Gianluigi filed Critical Ito Di Traspadini Gianluigi
Publication of EP0399963A1 publication Critical patent/EP0399963A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L5/00—Drawing boards

Definitions

  • Modern drawing tables beside a support structure (base, shelfs' frame, etc.) and different adjustment devices (pedals, counterweigths, locking and unlocking mechanisms, etc.), comprise, as shown in Fig. 1, a drawing board 1, on the top side of which is usually present a guide 2 for a car­riage 3 carrying a vertical guide 4 provided with a lower rest wheel (not visible in the figure) and along which a vertical carriage 5 carrying a goniometer and the couplings for the rulers runs.
  • a drawing board 1 on the top side of which is usually present a guide 2 for a car­riage 3 carrying a vertical guide 4 provided with a lower rest wheel (not visible in the figure) and along which a vertical carriage 5 carrying a goniometer and the couplings for the rulers runs.
  • the work at a drawing table is often characterized by frequent interruptions: from daily stops of working hours and/or for attending to other priority functions, such as re­ceiving clients, to longer interruptions for vacation and holidays, etc..
  • interruptions and generally in proportion to the length of the interruption, swelling and other deformations of the drawing sheet left on the drawing board due to temperature and humidity changes may be observed together with an accumulation of dust and dirt on the sheet which is often attracted by electrostatic charging induced by the rubbing of the drawing paper.
  • the visit of extraneous personnel is often inevitable and therefore important projects may remain incautiously exposed on the drawing table for too long periods of time.
  • An objective of the present invention is to provide a practical roller blind for a drawing table, which blind may effectively protect the drawings from dust and dirt during the periods when they are left on the drawing table as well as to discreetely block the view of projects being elaborated to unauthorized persons which may be passing by or standing for considerable time in view of the drawing table.
  • the horizontal top guide 2 of a normal drafting machine (shown in Fig. 1) is replaced by a guide-­blind roll housing 2a, provided with a longitudinal slot 17 through which a blind 7 disappears inside the housing 18 of the special guide body 2a, upon winding on a roller 6 which is contained therein.
  • a horizontal guide body 2a may be easily fabricated by extrusion with aluminum or similar mate­rial, thus providing to form a guide profile which may be at least partially similar to the guide profile of a top hori­zontal guide 2 of a conventional drafting machine, i.e. capable of receiving the wheels 3a and 3b of the top carriage 3 of the drafting machine.
  • the extruded body may also be conveniently provided with a "T" section channel 2b capable of receiving a mating "T” projection of brackets 19 for as­sembling the guide body 2a on the top edge of the drawing board 1 of the table.
  • the slot 17 of the guide body 2a has a spacing ridge 2c over which the blind screen 7 runs when it is pulled unwound from the roller 6 and this ridge 2c is set so as to facilitate the pulling of the screen 7 over the drawing board at a certain distance from the surface of the board in order to avoid the rubbing of the screen on the surface of the drawing paper.
  • the free extremity of the blind screen 7 is conveniently provided with a reinforcing rod or with a rigid metal bar 8, preferably having an "L" shaped profile so as to form a grip for making easier the pulling of the blind 7 over the drawing board, unwinding it from the roller 6 in opposition to the force exerted by a rewind spring.
  • suitable hooks 9 are provided for anchoring the two ends of the grip bar 8 in order to keep the extended blind from rewinding back on the spring loaded roller 6.
  • One or more pairs of hooks 9 may be fixed along the sides of the drawing board 1 for engaging the opposite ends of the reiforcing road or grip bar 8 which purposely extend beyond the edge of the blind screen 7 and of the drawing board 1.
  • Other and/or different retaining means will be easily contrived by a skilled technician.
  • the rewinding mechanism of the blind screen 7 on the roller 6 preferably comprises a shaft 10, solidly connected through a nonrotatable joint on at least an end flange or cap 13 of the guide body 2a.
  • the roller 6, through a coupling tooth (not shown in the figure) is rotatably coupled to a sleeve 11 which is free to rotate (together with the roller 6) about the shaft 10.
  • a helical torsional spring 12 is mounted over the shaft 10 and has a first extremity 12a connected to the shaft 10 while the opposite extremity is fixed to the sleeve 11, which is also free to move axially along the shaft 10 and the rol­ler 6 (the coupling tooth of which being able to run inside the longitudinal guide 11a present on the sleeve 11).
  • the slot 17 of the guide body 2a is provided with a small longitudinal brush 14, which is mounted so as to be easily replaced periodically upon wear and deformation, for detaching particles which may have adhered to the surface of the blind screen 7 during rewinding of the latter on the roller 6.
  • a brush will contain metallic whiskers for preventing induction of static charges on the blind 7 which could attract and retain dust particles and/or erasing rubber particles.
  • FIG. 5 A further embodiment is depicted in Fig. 5.
  • This alterna­tive embodiment is particularly suitable for retrofitting an existing drafting table without substituting or modifying the horizontal top guide of the drafting machine, when such is present or in the case of traditional, balance-type, drafting machines.
  • the roller guard body is fixed to the bottom edge of the drawing board 1 and the blind screen 7 is extended from the bottom to the top of the table.
  • the guard body 15 which contains the winding roller 6 of the blind 7 may be made by an extruded aluminum bar having a profile as depicted in Fig. 5.
  • the profile may already be shaped so as to be easily fastened to the bottom portion of the drawing board 1 by means of screws 19, by providing for the use of eventual spacers over the fixing flange portion to account for different thicknesses of the drawing board 1.
  • the guard body 15 is preferably provided with an appendix 16 having a shape suitable to act as a shelf for drawing instruments.
  • the roller guard body 15 may also be hinged at the point 18 to the flange portion 20 in order to be able to drop down the roller guard body for re­moving accumulated debris and dirt.
  • the guard body 15 will be raised and blocked in a working position by means of hooks or by means of a central stop mechanism fixed on the back of the board (not shown in the figure).
  • the blind screen 7 may be a sheet or a cloth of nylon, polythene or other flexible and opaque material such as a sheet of polyvinilchloride (PVC) loaded with an opacizer material and/or coupled with a reinforcing fabric. Es­sentially the blind screen 7 will be opaque in order to impede the vision of a drawing affixed on the drawing board.
  • PVC polyvinilchloride
  • roller blind of the invention may also be useful for implementing various safety systems which, by contemplating a block of the extended blind, detect (if not prevent) an eventual unauthorized lifting of the blind.
  • Locks and other blocking devices, as well as electronic alarm systems may be easily contrived and utilized for implementing such systems.
  • the unwinding and the rewinding of the blind may also be motorized by using a geared-down electric motor.
  • roller guard body may also be mounted along one side of the drawing table and the blind may be extended horizontally across the board.

Landscapes

  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP90830223A 1989-05-24 1990-05-18 Rolladen für Zeichenbrett Withdrawn EP0399963A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8983624A IT1235827B (it) 1989-05-24 1989-05-24 Schermo avvolgibile per tecnigrafo.
IT8362489 1989-05-24

Publications (1)

Publication Number Publication Date
EP0399963A1 true EP0399963A1 (de) 1990-11-28

Family

ID=11323310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830223A Withdrawn EP0399963A1 (de) 1989-05-24 1990-05-18 Rolladen für Zeichenbrett

Country Status (2)

Country Link
EP (1) EP0399963A1 (de)
IT (1) IT1235827B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6487784B1 (en) * 2000-06-29 2002-12-03 Jayson J. Powers Portable drawing board for art students
KR200447467Y1 (ko) 2009-08-24 2010-01-27 이수정 미술용 프로텍터
CN112652208A (zh) * 2020-12-23 2021-04-13 南京铁道职业技术学院 一种工业艺术设计用综合教学平台
CN114734749A (zh) * 2022-05-06 2022-07-12 日照职业技术学院 一种移动式经济管理学绘图板

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112293951B (zh) * 2020-10-13 2022-08-30 周立翔 一种建筑设计用绘图架

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699627A (en) * 1952-11-14 1955-01-18 Jr John W Matthews Tracing protector for drafting tables
US3220661A (en) * 1963-04-25 1965-11-30 Hegedus Gabor Protective cover for drawing-boards and the like
GB2066163A (en) * 1979-12-21 1981-07-08 Beckett J R Drafting table
US4357978A (en) * 1980-06-02 1982-11-09 Keller Products, Inc. Roller shade seal system
FR2514816A1 (fr) * 1981-10-15 1983-04-22 Peyrichou Fermetures Henri Volet roulant hermetique
FR2539601A1 (fr) * 1983-01-20 1984-07-27 Wild Leitz France Dispositif de protection de table a dessin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699627A (en) * 1952-11-14 1955-01-18 Jr John W Matthews Tracing protector for drafting tables
US3220661A (en) * 1963-04-25 1965-11-30 Hegedus Gabor Protective cover for drawing-boards and the like
GB2066163A (en) * 1979-12-21 1981-07-08 Beckett J R Drafting table
US4357978A (en) * 1980-06-02 1982-11-09 Keller Products, Inc. Roller shade seal system
FR2514816A1 (fr) * 1981-10-15 1983-04-22 Peyrichou Fermetures Henri Volet roulant hermetique
FR2539601A1 (fr) * 1983-01-20 1984-07-27 Wild Leitz France Dispositif de protection de table a dessin

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6487784B1 (en) * 2000-06-29 2002-12-03 Jayson J. Powers Portable drawing board for art students
KR200447467Y1 (ko) 2009-08-24 2010-01-27 이수정 미술용 프로텍터
CN112652208A (zh) * 2020-12-23 2021-04-13 南京铁道职业技术学院 一种工业艺术设计用综合教学平台
CN112652208B (zh) * 2020-12-23 2023-12-19 南京铁道职业技术学院 一种工业艺术设计用综合教学平台
CN114734749A (zh) * 2022-05-06 2022-07-12 日照职业技术学院 一种移动式经济管理学绘图板

Also Published As

Publication number Publication date
IT1235827B (it) 1992-11-03
IT8983624A0 (it) 1989-05-24

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