FR2565090A1 - NOZZLE - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A SUCKER TO BE FIXED ON AN INDUSTRIAL VACUUM PIPE FOR THE CLEANING OF FLOOR SURFACES. THE SUCKER 1 IS EQUIPPED WITH TWO ROLLS 8, 9 DISTANT FROM ONE OF THE OTHER AND HOUSED IN A CASE 2, OF WHICH THEY ARE PARTLY EXCEEDING. AT LEAST ONE OF THE ROLLERS SHOWS A PERIPHERAL GROOVE. THE LATTER CAN BE HELICOIDAL AND COVER THE ENTIRE LENGTH OF THE ROLL OR BE REPRESENTED BY SEVERAL ANNULAR GROOVES, ONE ARRANGED BEHIND THE OTHERS. THESE GROOVES ALLOW THE ABSORBED LIQUID TO BE SENT INTO THE CRANKCASE, THEN INTO A SUCTION PIPE, IN THE FORM OF INDIVIDUAL NETS. THE ABSORPTION OF THE LIQUID BEING THUS QUICK AND TOTAL, IT IS POSSIBLE TO CLEAN HARD SPORTS FIELDS IN A MINIMUM OF TIME, AFTER HEAVY ATMOSPHERIC PRECIPITATION.

Description

The present invention relates to a nozzle for attaching to a pipe.

  industrial vacuum cleaner for cleaning floor surfaces, equipped with two rollers at least distant from each other in the working direction and mounted in a housing,

which they partially exceed.

  Squeegees of this type make it possible to suck liquids from soil surfaces, in particular water previously used

  for cleaning. They are connected to an industrial vacuum cleaner.

  triel through a pipe. To absorb liquids on hard sports grounds, rainwater

  residuals on tennis courts for example, the

  liquid liquids already known are not suitable, because they detach and suck by their mechanical effect sections

  soggy coatings by sliding on the surface to be cleaned

  yer, thus forming additional cavities. In order to avoid

  ter these detachments, it is advisable to manipulate the already known nozzles with extreme precaution, linked to notable losses of time; the sports ground being therefore impracticable for an extended period, the deficits are considerable and the establishment of new reservation lists requires additional work. It would indeed be necessary to reduce to a minimum the compulsory downtime for players, because the rental price, in periods of

  tip in particular is extremely high.

  The invention aims to create a nozzle of the type described above such that it is also suitable for cleaning

  hard sports grounds, large amounts of li-

  which can be vacuumed in a minimum of time, without damaging the floor surface. According to an essential characteristic of the invention, at least one of the rollers is provided with at least one peripheral groove. Under the suction force of the air current generated by

  J, the corresponding industrial vacuum cleaner, the grooves conform-

  mes to the invention allow to direct threads of

  which are individual in the squeegee housing, from where they are sent into the suction pipe and into the vacuum cleaner

  cited above. The configuration of the grooves therefore ensures

  fast and perfect ration of the residual liquid on the surface of the floor to be cleaned, so that tennis courts, for example, become practicable in a minimum of time after heavy rain, periods of downtime

play is thus minimized.

  In an advantageous form of construction of the invention,

  the groove, preferably helical, extends essentially

  along the entire length of the roll.

  Another preferred form of construction is shown.

  ted by several annular grooves, arranged one behind the other in the longitudinal direction of the roller,

with an intermediate spacing.

  An advantageous measure of the invention resides in the fact that the two rollers, the minimum respective spacing of which is preferably equal to approximately 1 mm, have approximately the same length and / or the same diameter, from 50 to 60 mm preferably, and are respectively provided with a

groove at least.

  A preferred form of construction is a

  groove width of approximately 2 mm 6 mm, for a depth

  between 1 mm and 4 mm approximately.

  Another advantage is that the slope of the groove, preferably in the opposite direction, is between 5 mm and 15 min approximately. In a judicious form of construction of the present invention, at least one of the two rollers can move away from the other, by a movement perpendicular to its axis and against the force of a spring, the axis of rotation of the displaced roller preferably supported by movable sliders

  relative to the housing and subjected to the spring force.

  It is also advantageous for a flange of the casing,

  oriented towards the soil surface to be treated and fitted with

  rence of a brush projecting downwards, the ends of which

  horsehair tees are judiciously spaced a few millimeters from the aforementioned surface, has a preferential spacing of approximately 8 mm to 10 mm relative to the floor to be cleaned. Another judicious measure resides in the fact that the current of sucked air and liquid, after passing through the slot separating the two rollers, is admitted into a guide device preferably extending over the entire length of the rollers and the internal compartment of the housings this device, provided between the upper side of the rollers

  mentioned above and the internal face of the upper wall of the

  ter, presenting a hydrodynamic assembly with a tubu-

  lure for connection to the suction pipe.

  Another advantage of the present invention is that the provision

  guide device has two sections inclined in the direction of the rollers and slightly spaced from the surface of the latter, the free ends of the aforementioned device being preferably oriented towards the slot which separates the two rollers, being located a short distance from the latter and forming an admission slot which widens by

  preferably in the direction of flow.

  An advantageous measure finally lies in the fact that the guide device is provided with at least one scraper, two

  preferably, which rest on the rollers.

  The invention will be better understood using the two examples

  of construction illustrated in the accompanying drawings, which

  have: Figure 1: a side view and a partial axial section of a nozzle according to the invention, provided for an industrial vacuum cleaner for dust, debris and liquids, Figure 2: a view of the nozzle according to arrow X in the figure 1, on a reduced scale, with two rollers with an icoidal groove, Figure 3: a view and a partial section of the support points of the squeegee rollers according to Figures 1 and 2, Figure 4: a view similar to that of Figure 2 of

  second form of construction of a conforming nozzle

  me to the invention, - with two rollers provided with several annular grooves arranged one behind the other in the longitudinal direction,

with an intermediate spacing.

  The nozzle 1 of Figures 1 and 2 is connected via a suction pipe (not shown) to an industrial vacuum cleaner. It has a casing 2, open in the direction of the floor surface B to be cleaned. On its upper wall 3,

  the casing 2 is provided with a connection tube 4 articulated

  abutment. A joint 5 of the tube 4 is provided with an elastic bellows 6, which forms an airtight and liquid-tight connection between the casing 2 and the aforementioned tubing 4. The internal compartment 7 of the casing 2 comprises two rollers 8 and 9 separated by a slight separation. The axes 10 and 11 of the rollers 8 and 9 are mutually parallel and preferably perpendicular to the working direction A. These two rollers 8 and 9 protruding by approximately 10 mm from the casing 2, a flange 12 of the latter, which forms a projection vertical downwards, at a certain distance from the ground, when the nozzle passes over the surface B to be treated. To form a suction slot giving the air flow sucked in the intake speed required for absorbing liquids, the casing edge 12 is provided with a brush 13 in the form of a ribbon and with tight bristles. This circular brush 13 has such flexibility that the casing 2 and the ground B are not damaged by impacts against objects or impacts on the surface.

  B. It also opposes any penetration by parties.

  hard cules, stones for example or others, in the area between the rollers. The ends 14 of the brush of the rim 12 have relative to the surface B a

  minimum distance of a few millimeters.

  The surfaces of the two rollers 8 and 9 have rai-

  helical ribs 15, 16, the width, depth and slope of which are approximately 2 mm, 1 mm and 15 mm, for example, respectively. The helical groove 15 of the roller 8 is preferably left-hand, the groove 16 of the roller 9 being straight-hand. These grooves 15, 16 may however have the same inclination. Through them, large quantities of liquid, accumulated in front of the first roller 8

  in working direction A, can be pushed inside

  laughter of the casing with the passage of the squeegee on the surface B to be cleaned, then directed into the guide device 17 by means of the slot z separating the two rollers 8 and 9. This device 17 in the form of a conduit, which extends over the entire length of the two rollers 8, 9, therefore of the casing 2, is located between the upper wall 3 of the latter and the

  upper part of the aforementioned rollers. It consists pre-

  preferentially guide surfaces 18 and 19 overlying

  tes with rollers 8 and 9, from which they are separated by a minimum distance. The ends of these surfaces 18, 19, inclined downward, limit an inlet slot 20 in the upper part to the slot z separating the rollers 8 and 9. The slot 20 extending over the entire length of the latter and widening in a funnel upwards in the direction of the liquid sucks, this results in a conduit 22, formed with the internal surface of the upper wall 3 of the casing

  and opening into an inlet orifice 21 of the joint

  abutment 5 of the tubing 4. The suction pipe, connected to the aforementioned tubing 4, makes it possible to send the absorbed liquid

  in a receptacle (not shown) of the vacuum cleaner

  industrial. To remove from the rollers 8, 9 the foreign bodies adhering to the surface, the two guide faces 18, 19 are provided with a scraper 24, which bear under minimal pressure on the corresponding surface of the rollers. In the

  peripheral direction of the latter, the scrapers 24 present

  try chamfered side edges 24a, 24b which

  easily detach particles adhering to the surface. As shown in Figure 3, the roller 9 (not shown)

  in Figure 1 is movable in the casing 2 perpendicular to the

  area of its axial direction. Each end of the axis 11 of the aforementioned roller enters a corresponding pad 25 of a rectangular slider 26 in the form of a plate. The two sliders 26 move on the two short sides 30 of the casing 2. The bearing 25 is located in a first half

  cursor 26, the other half having a recess rec-

  tangular 32 open on one side, into which a coil spring 33 penetrates. Outside the recess 32, the spring 33 rests on a closing plate 34 which closes an opening 35 of the casing 2, made in Moon

  longitudinal walls 36 of the latter.

  When the vacuum cleaner with nozzle 1 is in operation,

  stones for example or other hard particles can penetrate

  trer in the slot z which separates the rollers 8, 9, where they may get stuck; this drawback is avoided by the sliders 26: the roller 9 is then moved to the right against the force of the spring 33 (figUre 3), its axis 11 sliding in the aforementioned direction with the sliders 26. This movement continues until that the front faces 37, 37 ′ of the sliders 26, which limit the recess 32 on the side opposite to the pad 25, abut on the internal face of the closure plate 35. The stones or the like are then quickly and easily disengaged from the enlarged slot z. As soon as these foreign bodies are removed, the force of the

  pressure spring 33 pushes roller 9 back into its posi-

  initial tion, in which the sliders 26 abut on the bearing surface 27. In order to obtain a slight bearing pressure of the scrapers 24 on the rollers 8, 9, the guide surfaces 18, 19 have an embodiment such that '' they are subjected to elastic deformation in their position of

  mounting, thus compressing the scrapers against the rollers.

  The scraping effect is improved.

  In the construction form of FIG. 4, the helical grooves 15, 16 of FIG. 2 are replaced by several closed annular grooves 23, 23a, arranged one behind the other in the longitudinal direction of the

  rollers 8 ', 9', with an intermediate distance. A few-

  some or all of these grooves 23, 23a may have a different spacing. They also have a respective offset, but may also be located at the same height. Also in this form of construction, the roller is provided with an elastic mounting relative to the casing 2 ', as previously described with the aid of FIG. 3. In the two forms of construction, the grooves 15, 16,

  23, 23a can have a semicircular section, angular

  milk, preferably rectangular or conical. Their width can be from 2 mm to 6 mm, their depth from 1 mm to 4 mm approximately, depending on the use of the vacuum cleaner and / or the size of the rollers 8, 9, 8 ', 9'. The slot z separating the two rollers 8, 9 and 8 ', 9', defined by the minimum spacing of

  the latter has a width of about 1 mm.

Claims (11)

Claims.   1. Nozzle to be fixed to an industrial vacuum cleaner hose for cleaning floor surfaces, equipped with two rollers at least distant from each other in the working direction and mounted in a housing, of which they partially protrude, characterized in that at least one of the rollers (8, 9; 8 ', 9') is provided with at least one peripheral groove (15, 16; 23, 23a). 2. Nozzle according to claim 1, characterized in that the groove (15, 16), preferably helical, extends   essentially along the entire length of the roll.   3. Nozzle according to claim 1, characterized by more   several annular grooves (23, 23a), arranged one behind the other in the longitudinal direction of the roller   (8 ', 9'), with an intermediate spacing.   4. A nozzle according to any one of claims 1 to 3,   characterized in that the two rollers (8, 9; 8 ', 9'1), the respective minimum spacing (z) of which is preferably equal to approximately 1 mm, have approximately the same length and / or the same diameter, preferably from 50 to 60 mm approximately, and are respectively provided with at least one groove (15, 16; 23, 23a).   5. A nozzle according to any one of claims 1 to 4,   characterized by a groove width (15, 16; 23, 23a) of approximately 2 mm to 6 mm, for a preferred depth   between approximately 1 mm and 4 mm.   6. Nozzle according to any one of claims 1 to 5,   characterized in that the slope of the groove (15, 16), preferably in the opposite direction, is between 5 mm and mm approx.   7. Nozzle according to any one of claims 1 to 6,   characterized in that at least one of the two rollers (9)   can move away from the other (8), by a perpendicular movement   laire its axis (10, 11) and against the force of a spring, and in that the axis of rotation (11) of the roller (9) moved is preferably supported in sliders (26) movable by   relative to the casing (2) and subjected to the spring force (33).   8. Nozzle according to any one of claims 1 to 7,   characterized in that a flange (12) of the casing, oriented towards the ground surface (B) to be treated and preferably provided with a brush (13) projecting downwards, the ends of which   horsehair (14) are judiciously spaced a few milli-   meters from the above-mentioned surface (B), has a preferential spacing of approximately 8 mm to 10 mm relative to the ground (B) to clean.   9. Nozzle according to any one of claims 1 to 8,   characterized in that the flow of aspirated air and liquid,   after passing through the slot (z) separating the two wheels   leaux (8, 9; 8 ', 9'), is allowed in a guide device   dage (17) preferably extending over the entire length of the rollers (8, 9; 8 ', 9') and of the internal compartment (7) of the casing, this device being provided between the upper side   of the aforementioned rollers and the inner face of the upper wall   lower (3) of the casing (2) and having a hydro-   dynamic with a connection pipe (4) to the suction pipe. 10. Nozzle according to claim 9, characterized in that the guide device (17) has two sections (18, 19) inclined in the direction of the rollers (8, 9; 8 ', 9') and slightly spaced from the surface of these, and in this   that the free ends of the device (17) are preferably   rence oriented towards the slot (z) which separates the two wheels   leaux (8, 9; 8 ', 9'), are located a short distance from the latter and form an intake slot (20) which   preferably widens in the direction of flow.   11. Nozzle according to one of claims 9 and 10, characterized   in that the guide device (17) is provided with a ra-   cloir (24) at least, preferably two, which are based on the rollers (8, 9; 8 ', 9').