FR2630665A1 - DEVICE FOR TREATMENT BY IMMERSION IN A BATH OF A TUBULAR OBJECT HAVING A FRAGILE OUTER SURFACE - Google Patents

Abstract

The device comprises a tank 2 for a treatment bath 3, a support 5 for the object 6 articulated on a carriage 7 sliding vertically on the slides 8 and pivoting actuation means 9 of the carriage 7 relative to the support 5, so that the immersion of the object 6 in the bath 3 takes place gradually. In addition, the object 6 being tubular, means M are provided to drive it in rotation at least during the immersion.

Description

The invention relates to a device for the treatment

  by immersion in a bath of a tubular object pre-

  feeling a fragile wall. This device is used in particular for cleaning stencils or stencils used in printing machines. Various types of treatment devices are already known for immersing an object in a bath. This bath can contain various chemical agents for attacking the object and / or constitute a medium for transmitting ultrasonic waves. Such devices include a bath, an object support associated with a manual or automatic handling system,

  the latter generally consisting of a suspended nacelle

  due to a winch or the like.-These devices may also

  ment include means for rotating the object to

  treat around a horizontal axis to increase the efficiency

  cited of the physical or chemical action of the bath. However, if these devices are capable of handling a wide variety of objects, the manipulation of objects through them

  is often too brutal to be suitable for somewhat rigi

  of and having large external surfaces and fragile walls, such as rotary stencils or stencils used in. printing machines. Indeed, if we do not take special precautions for the penetration of these parts in the bath, resistance to penetration

  that the bath offers can cause deformations and

  trissures of the. fragile outer wall of objects.

  The main object of the invention is to remedy this situation by proposing a device which allows progressive immersion in a treatment bath. of a tubular object having a fragile wall, further having a surface

important exterior.

  With a view to achieving this aim, a device according to a first embodiment of the invention is proposed for the treatment by immersion in a bath of a tubular object having a fragile external surface comprising a vertical frame along which slides a object support, means for driving the object support, along the frame, a tank containing a bath, the object support being movable

  between a loading position in which the object is -

  loaded horizontally and a position of penetration and immersion in the bath in which the object is tilted relative to the bath. In accordance with the invention, the support for the object is articulated on a mobile carriage sliding along the frame and comprises pivoting actuation means.

  between a loading position and a penetration position

  tion and immersion of the object support, harnessed between the

object support and carriage.

  So, by penetration. tilted object in the bath, decreases the surface of the object directly in contact with the bath during immersion, and thereby eliminates any risk of damage to the object. In addition, such a device allows, if necessary, to evacuate the air trapped inside the object during immersion in the bath, thereby improving the effectiveness of the treatment, and in particular the

transmission of ultrasound.

  According to a second embodiment of the invention, there is provided a device for the treatment by immersion in a bath of a tubular object having a fragile outer surface comprising a vertical frame along which slides a support for the object, means object support drive Along the frame, a tank containing a bath, the

  support of the object being movable between a load position-

  ment in which the object is loaded horizontally and a

  position of penetration and immersion in the bath in the

  THAT THE OBJECT IS INCLINED IN RELATION TO THE BATH, IN WHICH THE SUPPORT OF THE OBJECT IS MOUNTED DIRECTLY SLIDING ON A GUIDE PATH CARRIED BY THE FRAME, THIS GUIDE PATH CONSTITUTING THE PIVOTAL ACTUATION MEANS object between a loading position substantially parallel to the surface of the bath and a penetrating position

  in the bath inclined with respect to this surface.

  According to a first variant of the second embodiment

  Reading of the invention, the guide path comprises an upper section along which the object support is in the loading position and a lower section forming an inclined ramp along which the support is in position.

of penetration into the bath.

  So, by the mere fact of the sliding of the support-

  of the object on the guide path, the object support and therefore the object tilt when entering the bath so that the object gradually penetrates into

the bath.

  According to a second variant of the second embodiment

  sation of the invention, the guide path is rectilinear

  along the frame, the frame being articulated by its end

  lower around an axis on a fixed base and coupled to means for establishing and adjusting its inclination around

of the articulation axis.

  Other features and advantages of the invention

  tion will appear on reading the following description of

  non-limiting embodiments in conjunction with the

  attached sins, among which - Figure 1 is a schematic overview of a first embodiment of the device according to the invention, the support of the object drawn in solid lines in a loading position of L ' object to be treated and in phantom in a position of penetration and immersion of the object in the bath,

  - Figures 2 to 7 are schematic views by-

  cross sections representing different embodiments of actuation means for pivoting the support of the object relative to the carriage, - Figure 8 is a schematic overview of a first variant of the second embodiment of the device

  according to the invention, the support of the object drawn in a mixed line-

  te in a position of penetration of the object in the bath,

  and in solid lines in a loading and immersion position.

  sion of the object in the bath, FIG. 9 is a schematic overview of a

  second variant of the second embodiment according to the invention

  tion, the object support drawn in solid line, in a position of penetration of the object in the bath, and in mixed line in a position of loading and immersion of the object

in the bath.

  Referring first to Figure 1 we see a device for the treatment by immersion of an object designated under the general reference numeral 1. This device comprises a tank 2 of a washer or a stripper, etc. .. with or without ultrasound containing a treatment bath 3. The device

  also includes a frame 4 extending vertically in the direction

  placed near the tank, a support 5 for the object to be treated 6 and drive means (not shown) of the support relative to the frame. The support is mounted articulated in a vertical plane on a carriage 7 sliding on slides 8 coupled to the frame. The device further comprises pivoting actuation means 9 arranged between the carriage 7 and

support 5.

  The support 5 consists of a metal box

  substantially "L" shaped including in its upper part

  a hinge 10 allowing the support 5 to pivot

  relative to the chassis of the carriage 7. And in its lower part

  a receiving axis 11 of the object to be treated 6 is rotatably mounted in bearings 12 of the support 5 and is retained for example by means of a transmission by sprocket chain at

  the output shaft of a motor M fixed inside of the par-

  upper tie of the box. This receiving axis 11 extends in a substantially horizontal cantilever in a loading position of the object to be treated 6 (in solid lines in the figure). In the embodiment illustrated in FIG. 1,

  The object to be treated 6 is constituted by a tubular piece Lon-

  such as a rotating stencil. This tubular part is threaded over its entire length, on the receiving axis 1I and abuts by one end against a first fixed flange 13 disposed near the support 5 and is held in position by a second flange 14 applied to the other end of the part to be treated and immobilized in

  translation on the axis 11 by a stop screw 15.

  - It will be noted that the flanges 13, 14 have on their opposite faces a series of stepped shoulders in order to allow the fixing of tubular parts of different diameters. These flanges, which are schematically represented, may include elastic fixing accessories or

  tires for tensioning the circumferential tubular object

essentially and / or axially.

  Referring now to Figures 2 to 7, we see different embodiments of actuating means in

  pivoting of the support of Object 5 in relation to the carriage:?.

  In Figures 2, 3 and 4 are different illustrated.

  configurations of pivoting actuation means 9 cons-

  held in place by jacks. The cylinders 17, 18 and 19 are coupled by one end to the chassis of the carriage 7 and by another

  end of a support plate 20 soLidary of the support (fig.

  res2 and 3) or by means of two lever arms 21,

  22 (Figure 4). The jack 17 used in the embodiment

  tion of Figure 2 is a screw jack actuated for example

  by an electric motor fixed on the carriage (not shown).

  The jacks 18, 19 used in the embodiments illustrated in FIGS. 3 and 4 are hydraulic or pneumatic jacks conventionally controlled by distributors.

(not shown>.

  For reasons of minimum space and convenience

  dity of manufacture, The support plate 20 is fixed to the in-

  térieur of the lower part of the support 5 and the jacks pass through a recess 23 formed for this purpose in the

  wall 24 of the support, arranged opposite the chassis of the carriage.

  In FIG. 5, another embodiment is shown.

  sation of the pivoting actuation means 9 of the support 5

  relative to the carriage constituted by a deformed parallelogram

  Mable 25 actuated by an inverted pitch screw 26 connected to

  suitable drive means such as an electric motor

  that 11 disposed in the box of the support 5. This parallelogram is coupled by two opposite ends. to the chassis of the carriage 7 on the one hand, and to the support plate 20 secured to the support 5,

on the other hand.

  FIG. 6 shows another embodiment of the pivoting actuation means 9. In this case, the actuation means consist of a cam 27 rotatably mounted on a yoke 28 integral with the carriage 7, the top of the cam cooperating with one face of the support plate 20 secured to the support 5, the cam being driven in a rotational movement,

  for example by an electric motor.

  So when we order the means of action

  ment in pivoting above-described, the support of the object, and consequently the axis of reception of the object, tilt towards the

  top (in the direction of arrow F. figure 1).

  For reasons of particular arrangement of the set-

  ble of the device, the person skilled in the art will be able to arrange the articula-

  tion 10 between the carriage 7 and the support 5 so that the inclination

its to be down.

  Finally, FIG. 7 illustrates an embodiment of the pivoting actuation means comprising a follower roller 29 integral with the lower part of the support 5 sliding along a guide path 30 associated with the vertical slides 8 along which slides the carriage 7. This guide path associated with the slides comprises at least one section along which the carriage-support assembly moves in a position for loading the object and at least one inclined ramp 31 te along which the articulated support 5 can bow when the

  follower roller moves on the latter.

  Of course, the invention is not limited to the use

  reading of the above-described pivoting actuation means,

  and other variant embodiments of these means of action

  ment will easily come to the mind of the skilled person. Provision may be made for actuation by pivoting comprising, for example, a stepping electric motor directly engaged on the articulation 10, at the same time replacing the

  actuators of the actuation means described above by a system

5th gear cogwheel.

  In another embodiment of the immersion treatment device according to the invention illustrated by FIG. 8, the elements identical to those of FIG. 1 are designated by the same reference numerals, it can be seen that

  The object support is an integral part of the carriage 7.

  In addition, the pivoting actuation means of the support are external to the latter. As emerges from the figure, the actuating means comprise a guide path 32 along which slides the assembly the support carriage 7; 5. This guide path 32 extends vertically and is reached at

  built 4. It will be noted in passing that in this embodiment

  tion, the frame 4 is mounted for manufacturing reasons,

  The interior of the tank. According to the invention, the path

  dage 32 comprises on the one hand a section 32a along duqueL The carriage-support assembly 7; 5 moves to one position

  loading, and further comprises a ramp 32b incli-

  born along which the whole carriage-support 7; 5 moves to a position of penetration and immersion in the bath. By FIG. 9 is illustrated a last example of embodiment of the device according to the invention on which the

  same numerical references designate the same parts described

  your higher. As in the previous embodiment, the object support is an integral part of the carriage 7

  which slides along the slides 8 integral with the frame 4.

  The frame 4, with the slides 8 is articulated: by its end

  lower part, around an axis 34 carried by a yoke 36 secured to a fixed base 35. The axis is perpendicular to the direction of movement of the support-carriage 5 assembly; 7 and substantially orthogonal to the axis 11 of the support 5. This device also comprises pivoting actuation means 32 constituted for example by a jack coupled on the one hand to the frame 4, 8 and on the other hand, to the base fixed 35 preferably at a point distant from the joint 34, 26 to establish and maintain the inclination of the frame 4 desired for inclined penetration

of the object in the bath.

  Of course, the invention is not limited to the embodiments described and it is possible to make alternative embodiments without departing from its scope. In particular, we

  may plan to treat parts with external surfaces

  fragile res of different shapes, for example a frame; it is also possible to provide between the frame 4 and the tank 3 actuation means 33 in alternating movement of small amplitude of the frame relative to the tank 2 (FIG. 1) or

  of the tank relative to the frame in order to animate the immersed parts

  gées to be treated with an alternating movement of small amplitude with respect to the bath, and in particular with respect to the ultrasonic radiation and thus to improve The effects of the treatment on

the room.

  The immersion treatment device according to the

  vention, which is shown diagrammatically in FIGS. 1 and 8 and 9, is used in the following manner: First, the device 1 is loaded with a tubular part to be treated 6, for example a rotary stencil. The stencil is threaded manually or, if necessary, automatically on the receiving axis 11 of the support 5 of the object then is fixed on the axis while the latter occupies

  a horizontal position above the bath 3.

  The work is then lowered from the room to the bath, communicating an inclination of

  a few degrees upwards (see figures 1, 8,9), by the in-

  intermediate of the pivoting actuation means 9, 32, 37 described above. The part then enters the bath 3 at one end until it is completely immersed, then it undergoes its treatment. During the duration of the treatment, the part can be arranged indifferently in a horizontal position or

in an inclined position ..

  By tilting the part when it enters the bath, the resistance offered by the bath to penetration of the part is considerably reduced, so that the risk of damage to the part is reduced. In addition, this allows the air trapped in the room to escape. Furthermore, by rotating the part on itself, the effects of the impact are distributed over a larger area, and the rigidity of the part is improved while correspondingly reducing the

  risk of deformation thereof.

  During the treatment phase, the rotation of the

  piece can be kept; in order to standardize its treatment.

  Once the desired treatment has been carried out, the part is raised by tilting it beforehand as was done previously during the phase of penetration of the part into the bath, so as to evacuate the liquid remaining in the

  piece when this emerges.

  The support 5 is finally disposed in its initial position

  in order to unload the treated part and

  to be able to start a new cycle with another part.

  Likewise we can continue to communicate a movement

  ment of rotation to the part during its ascent phase and

  after its emergence in order to facilitate its draining.

  All these operations can be carried out using manual commands or using automatic commands managed for example by a classic programmable automaton.

Claims (10)

  1. Device for Treatment by immersion in   a bath of a tubular object (6) having an outer surface   fragile fragile comprising a vertical frame (4) Along which slides a support (5) of the object, means for driving the support of the object along the frame, a tank (2) containing   a bath (3), the support (5) of the object being movable between.   a loading position in which the object is loaded horizontally, and a position of penetration and immersion in the bath (3) in which the object (6) is inclined relative to the bath (3), characterized in that the support (5) of the object is articulated on a mobile carriage (7) sliding the   along the frame (4, 8) and in that it comprises means for   pivoting action (9) between a loading position and a position of penetration and immersion of the support (5) of: the object, reached between the support (5) of the object and the carriage (7).   2. Device according to claim 1 characterized   in that the pivoting actuating means (9) comprises   drive means reached on the one hand to the carriage (7) and   on the other hand to the support (5) of the object.   3. Device according to claim 1 characterized   in that the pivoting actuating means (9) comprises   a guide path (30) integral with the frame (4) and available   s parallel to the latter, Along which rolls a follower roller (29) integral with the support (5) of the object, the path   guide comprising at least one inclined ramp (31).   4. Device for treatment by immersion in   a bath of a tubular object (6) having an outer surface   fragile rieure comprising a vertical frame (4) along which slides a support (5) 'of the object, means for driving the support of the object along the frame, a tank (2) containing a bath (3 ), the support (5) of the object being movable between a   loading position in which the object is hori-   horizontally, and a position of penetration and immersion in the bath (3) in which the object (6) is inclined relative to the bath (3), characterized in that the support (5) of the object (6 ) is mounted directly sliding on a guide path   32, 8) carried by the frame (4), this guide path constitutes   killing The pivoting actuation means of the support (5) of   The object enters a substantially parallel loading position   Lele on the surface of the bath and a position of penetration in   The bath inclined with respect to this surface.   5. Device according to claim 4 characterized in that the guide path (32) comprises an upper section (32a) along which the support (5) of the object is in the loading position and a lower section forming an inclined ramp (32b) along Which The support (5) is   in position of penetration into the bath.   6. Device according to claim 4 characterized in that the guide path (8) is rectilinear along the frame, The frame 4 being articulated by its lower end about an axis (34) on a fixed base (35) and coupled to means (37) for establishing and adjusting its inclination around of the axis (34) of articulation.   7. Device according to any one of the claims   previous tions characterized in that The tank (2) and The   frame (4) are movable horizontally relative to one another   tre, actuating means (33) being coupled together.   8. Device according to any one of the claims   previous tions characterized in that The support (5) de.l.ob-   jet comprises a receiving axis (11) of the object (6) to be processed ter cantilevered.   9. Device according to Claim 8, characterized in that the receiving axis comprises means for fixing the objects to be treated (6) in the form of removable flanges: (13, 14, 15).   10. Device according to any one of the claims.   tions previously characterized in that the support (5) of the Ob-   jet comprises an axis (11) for receiving the object and the means   (M) rotational drive of this axis on itself.