FR2490155A1 - WIPING DEVICE OF A TABLE - Google Patents

Abstract

A. PANEL WIPERING DEVICE. B. IT INCLUDES A WIPER PAD 4 AND A DUST COLLECTOR 2 REMOTE FROM EACH OTHER. BUFFER 4 IS EQUIPPED WITH A SUCTION HOLE WHILE THE DUST COLLECTOR CONTAINS A VACUUM MOTOR. THE SUCTION HOLE OF THE BUFFER 4 COMMUNICATES WITH THE DUST COLLECTOR 2 BY A SOFT SUCTION TUBE 3 WHICH ALLOWS MOVEMENT OF THE BUFFER 4 IN ANY DIRECTION DESIRED. C. SCHOOL EQUIPMENT.

Description

Table wiping device When erasing letters and

  Characters or other figures written in chalk on the blackboard using a pad or table towel-wiper, the chalk in the form of powder or dust may disperse around and remain in suspension

  in the air by being sucked by the man, which is harmful

  to health. In addition, everything around

  the painting is polluted and takes an unsightly appearance.

  Finally, the chalk dust that attaches to the buffer

  wiper must be removed by beating it or using

a cleaning device.

  It has already been proposed to solve this problem by a wiper device which has inside a fan motor for removing dust from the chalk, which is produced when the board is erased, by a suction hole. arranged in the center of the device and intended to collect the dust in a cavity. But this prior wiper device consists of a single block completely independent of the table. That's why we can not house a larger fan motor inside.

2490155

  size capable of providing greater suction as long as the size of the device is limited

  by the necessity to be able to handle it with ease.

  In addition, a dry cell is used as a source of energy, which also goes against obtaining a sufficiently large suction. This results in an imperfect removal of chalk dust

  leaving much to be desired from the health point of view.

  Finally, the elimination of dust from the chalk that has

  been collected in the device is tedious.

  The invention relates to: - a table wiping device which facilitates a post-treatment, making sure that the dust

  of chalk that has been removed falls and is collected

in a given place.

  a table wiping device capable of giving a sufficiently large suction so that the dust

  chalk can be eliminated completely.

  According to the invention, the device is provided with a wiping pad or cloth and a collector of

  dust that are arranged at a distance from each other.

  The wiper pad has a suction hole while the dust collector contains a suction motor. A communication is established between the suction hole of the wiping pad and the dust collector via a suction tube which allows movement of the wiping pad in any desired direction. We can run the engine

  suction using an external switch.

  As a result, the chalk dust that has been wiped from the board by the wiping pad is moved away by the suction hole of the wiping pad and then collected by the dust collector through the suction tube. It follows that the only post-treatment. to perform is the rejection of the

  chalk dust that was collected in the collection

  dust generator so that a table wiping device requiring only one treatment is obtained.

later easy.

  As the dust collector is away from the wiper pad, it is possible to use a larger suction motor in the dust collector, which ensures perfect removal of chalk dust. This results in a table wiping device which eliminates

  the previous disadvantage of the dispersion of the

  of chalk in the surrounding atmosphere that

  harmed the health of the man.

  In the accompanying drawings given solely by way of example: FIG. 1 is an elevational view

of a variant of the invention.

  FIG. 2 is a sectional view on a larger scale of a dust collector

  used in the variant of Figure 1.

  FIG. 3 is a longitudinal sectional view of a table used according to variant

of Figure 1.

  Figure 4 is an enlarged elevational view of a wiper pad used

in the variant of Figure 1.

  FIG. 5 is a sectional view on the

line V-V of FIG.

  Figure 6 is a partial sectional view

  on a larger scale the wiping pad.

  Figure 7 is a sectional view to more

  large scale of another part of the wiping pad.

  Figure 8 is an elevational view

  of another variant of the invention.

  FIG. 9 is a longitudinal sectional view

  Figure 1 shows a table 1 and a dust collector 2, fixed to the left side of the table downwards thereof. A flexible suction tube 3 from the manifold 2. A buffer 4

  wiper is mounted at the free end of the tube 3.

  The flexibility of the tube 3 makes it possible to erase the entire surface of table 1, while not handling the buffer

4 wiping only with one hand.

  Referring to FIG. 2, the dust collector 2 consists of a cylindrical body and a dust container 6, which is screwed into

  the lower end of the body 5 removably.

  The upper wall of the body 5 is provided with vents 7

  for the air outlet, while a vacuum motor 8

  8a is mounted in the body 5. At a place below the motor 8 is mounted on the inner face of the wall of the body 5 a tube 9 and the open end of a bag-shaped filter 10 is adjusted around the end

  9. A motor 11 is mounted at the end of the

  lower part of the tube 9 and comprises an output shaft carrying drummers 12 which rotating impinge inside the filter 7. At a place below the support of the tube 9, the outer face of the body 5 is provided with a connection 13, which protrudes laterally for connection to one

  ends of the suction tube 3.

  As shown in Figure 3, a canal

  14 of U-shaped cross-section is attached to the end

  lower half of table 1 in order to receive the tube

3 flexible suction.

  Referring to Figures 4 and 5, the wiping pad 4 comprises a rectangular body

2490 155

  in the form of a dish, a wiping element 16 and a buffer holder 17. The inner face of the body 15 is provided with shoulders 15a, while the outer face of the buffer holder 17 is provided with protuberances 17a at conjugate locations of those of the shoulders 15a. It is thus possible to receive the buffer holder 17 in the body until the protuberances 17a bear on the shoulders 15a of the body 15. The left side of the body, as shown in Figure 4, is provided with section projections 15b wedge-shaped straight and arranged at locations corresponding to the shoulders formed on the other side. The distance between the projections 15b and the corresponding shoulders 15a is slightly greater than the thickness of the protuberances 17a formed on the buffer holder 17. The right side of the body, as shown in FIG. 4, is provided with springs 18 to blades, which are arranged, at an angle, in locations aligned with the shoulders a, which allows the protuberances 17a of the buffer holder 17 to be held between the springs 18 and the shoulders 15a. As a result, the buffer holder 17 can be retained by the body 15 by inserting the

  protuberances 17a formed on one of the sides of the holder

  buffer 17 in the space between the shoulders 15a and 5b of the body 15 and forcing the other side of the buffer holder 17 against the elasticity of the springs 18 until the protuberances 17a

  be maintained between the springs 18 and the shoulder-

  15a. The buffer holder can be removed from the body 5 by pulling the pad holder 17 upwardly while lowering the springs 18 against their own resilience. Since the buffer holder 17 is held in position by the fact that a plurality of protuberances 17a abut on the shoulders 15a of the body 15 in the above-mentioned manner, a plurality of slit or aperture-shaped suction holes are obtained. arranged between the outer face of the buffer holder 17 and the inner peripheral face of the body 15, these openings opening outwards. In addition, the cleaning pad 16 is also provided with two longitudinal suction openings 21, while the buffer holder 17 is provided again with openings 17b which are aligned with the openings 21. These openings 20, 21 of FIG. aspiration communicate with a space 22, which is formed in the inner bottom of the wiping pad. The space 22 communicates with the flexible suction tube 3 via a connector 15c formed on one of the sides of the body 15. When the tube 3 which contains two windings is used, these can be used. windings as a conductive wire. This arrangement can be convenient when one wishes to have a start switch

  for the collector 2 in the wiping device 4.

  In operation, when it is necessary to wipe the surface of the switchboard, it first starts the suction motor 8 by acting on a switch which is arranged in the device 4 or on a switch housed in the commutator 2. When the switch start is in the wiper device 4, it may include a proximity switch having no mechanical contact. This conveniently starts the motor 8 in an automatic manner, while the

  device 4 wiping is maintained with one hand.

  When the motor 8 is set in motion, the rotation of the fan 8a passes the air through the openings 20, 21 and through the space 22 in the wiper device, in the connection 15c in the suction tube 3, in the filter 10 and in the tube 9. When one erases a writing chalk in Table 1 using the wiper device 4, the dust or the chalk powder may tend to be deposited on the element 16 of the device wiping or scattering around. But, as the air is sucked through the openings 20 and 21, this chalk dust is also removed through the openings 20, 21 before being deposited on the element 16 or to disperse into the atmosphere. It goes without saying that most of the chalk dust tends to settle around the edge of the element 16 and to disperse into the atmosphere, but the suction openings formed around the wiping device 16 have a smaller thickness than the suction openings 21 in the bottom of the element 16, which produces a higher airflow velocity. Also the chalk powder is subjected to greater suction through these openings, effectively eliminating chalk dust from the area around the element 16. After being removed with air, the chalk dust passes through the suction tube 3 to go into the collector 2 o it hits the filter 10. Only the filtered air passes through the filter and the tube 9 and the motor 8

  to be evacuated through the outlet opening 7.

  When the wiping of the board is thus completed and when the wiper device 4 is released, the operation of the motor 8 stops automatically. Alternatively, the engine 8 can be stopped manually. This completes a suction operation allowing the chalk dust precipitated on the filter 10 to fall by gravity to be collected in the dust container 6. As the filter 10 can become engorged, the motor 11 can be started to beat the filter 10 by the drummers 12 when they rotate, which forces the chalk dust to separate from the filter 10. It is necessary to a convenient use that the engine 11 is started up and in operation for a given period in synchronization with the end of the operation of the engine 8. The chalk dust thus collected can be discarded or the container 6 of the collector can be removed 5. It goes without saying that the motor 11 can be

  replaced by a vibrator that oscillates the filter 10.

  In addition, the dust collector and suction motor can be arranged in different places. But it is necessary that the suction motor is downstream of the collector compared

in the air stream.

  Figures 8 and 9 illustrate another variant of the invention. Referring to Figure 8, a winder 30 is attached to the bottom of Table 1 to wind the flexible suction tube 3. The dust collector 2 is attached to the lateral side of the winder

  and is connected by a connection tube 31. The extré-

  Distal mity of the flexible suction tube 3, which is disposed on the reel 13, extends upwardly and is connected to the wiper device 4. The reel 30 may be an arrangement similar to that used

  to wind a rubber hose or cable.

  The winder 30 can be elastically pressed in one direction to envision the tube 3 or can operate manually. When the reel is biased by a spring to envid the tube 3, there can be provided an arrangement which blocks the tube 3 after a certain length of it has unwound from the reel 30 and which makes the tube 3 flushes when it is unlocked. The wiping device 4 is connected to the tube 3 which is intended to be envisioned on the reel 30. Consequently, the entire surface or any desired portion of the table 1 can be wiped by the wiping device 4 maintained at the hand because of the flexibility of tube 3 and the possibility

  to envy and unwind the reel 30.

  Referring to Figure 9, the lower end of Table 1 is provided with a flange la, which protrudes forward. The top plate 32 of a casing in which is housed the winder 30 is fixed to the lower end face of the flange 1a. The flange 1a and the plate 32 of the winder 30 are provided with slots lb, 32a, respectively oblong, through which the flexible tube 3 passes loosely. The slit lb oblong has a width which is less than the thickness of the wiping device 4, so that the latter comes into contact with the edge of the table 1 when

  the suction tube 3 is returned to the reel 30.

  - The dust collector 2 can be

  arranged as mentioned above.

  In the variant illustrated in FIGS. 8 and 9, only a limited length of the suction tube is returned when the wiper device is used, while the suction tube is returned to the reel when the wiper device is not used, which avoids any inconvenience of the staff by the

  presence of a flexible suction tube.

  When the reel 30 is provided, as shown in FIGS. 8 and 9, a channel, which may have a U-shaped longitudinal section, may be attached to the lower end of Table 1 in the same manner as in the previous embodiment. , so as to conveniently receive the flexible tube which is

unwinding of the reel 30.

Claims (11)

R E V E N D I C A T I 0 N S   1. Wiper device of a switchboard, characterized in that it comprises a switch operable from the outside, a wiper (4) in which is formed a suction hole, a collector (2) of dust placed at a distance from the wiping pad, a suction tube (3) providing communication between the suction hole of the pad   wiper and dust collector while allowing   both a movement of the wiper pad in any desired direction and a suction motor 8 disposed downstream of the dust collector, the engine being   operation in response to actuation of the inter-   switch. 2. Device according to claim 1, characterized in that the switch is mounted on the wiping pad.   3. Device according to claim 1, characterized in that the wiping pad is provided with suction holes around its outer periphery. and in inner portion.   4. Device according to claim 3, characterized in that the suction holes around the periphery are thinner in width than the internal suction hole. 5. Device according to claim 1, characterized in that the wiping pad comprises a removable wiping element.   6. Device according to claim 1,   characterized in that the suction tube is flexible.   7. Device according to claim 6, characterized in that the flexible suction tube is   intended to be envied on a reel.   8. Device according to claim 6, characterized in that the flexible suction tube is   received in a channel mounted on the bottom of the board.   9. Device according to claim 1, characterized in that the dust collector comprises a filter which separates the chalk dust entrained with the air. 10. Device according to claim 9, characterized in that the filter oscillates in response   the operation of an engine or vibrator.   11. Device according to claim 10, characterized in that the motor or the vibrator is set in motion for a period of time   given in synchronism with the completion of the suction motor.