WO1987002872A1

WO1987002872A1 - Process and machine for applying a coating to the inside of shoe sole seams

Info

Publication number: WO1987002872A1
Application number: PCT/CH1986/000150
Authority: WO
Inventors: Fritz Wegmann
Original assignee: Fritz Wegmann
Priority date: 1985-11-13
Filing date: 1986-10-31
Publication date: 1987-05-21
Also published as: CH668890A5; EP0245311A1

Abstract

To ensure proper sealing of sewn shoes, the inner region of the seam must be coated. To effect this operation by machine, a tube arrangement (67) is inserted in the shoe element (7) in order to feed the coating product to a jet (69) provided at the end of the tube. This jet (69) is moved from the tip of the shoe towards the heel region and during this operation is pressed by spring action (85) against the limit formed between the upper and the sole. Preferably two pipes (67) with jets (69) are opened in the manner of scissors in relation to a pivoting axis (79), thus providing simultaneous coating of the seam region of both sides of the longitudinal axis of the shoe.

Description

Process and system for the machine for the internal coating system of shoe sole seams.

The present invention relates to a method for the mechanical inner coating of shoe sole seams and to an inner coating system for shoe sole seams.

5

In the case of shoes, the upper part of the shoe, the upper leather, is either glued or sewn onto the sole area. In the latter technique, the watertightness of the seam section is of greater importance.

10 For this reason, the seam section is usually manually coated on the inside with a coating medium that covers the piercing openings that are inevitable during sewing.

15 This procedure is complex and cost-intensive in the series production of shoes.

The aim of the present invention is now to propose a method of the type mentioned at the outset, 20 in which the inner coating is carried out mechanically. This is achieved by introducing a nozzle arrangement into the shoe over the shoe upper, controlling a relative movement of the shoe and nozzle arrangement in such a way that the nozzle arrangement sweeps along the seam area and thereby outputs a coating medium from it.

The control of the relative movement must take place in such a way that, depending on the shape and size of the shoe, the area of the seam is covered relatively exactly.

This is further achieved in that an at least relative movement component of the nozzle arrangement and the shoe in the transverse direction of the shoe is carried out by scanning the boundary formed by the upper of the shoe on the sole, "at least" in the sense that the entire movement is also carried out Scanning said limit can be controlled.

In this way, a preliminary determination of the shoe shape with corresponding storage for controlling the relative movement is avoided, in that the nozzle arrangement is guided shoe-specifically along the edge formed by the shoe upper part on the sole in each work step.

It is further proposed that the relative movement to the coating in the toe area begins. This is advantageous because the nozzle arrangement has to be inserted through the shoe upper, there would be a relative movement from the heel side towards the shoe tip as a pushing movement of the nozzle with respect to the shoe, which is considerably less favorable with regard to the coating than if the nozzle arrangement were to be removed Pull the shoe along against the shaft.

The processing cycle for each shoe is halved by simultaneously sweeping the seam area on both sides of the shoe longitudinal axis with the nozzle arrangement.

It has further been shown that the coating medium, taking into account the great bending stress, to which the sole area and thus also the seam area is subjected when using the shoe, and further taking into account the chemical stress, such as by welding Separation of the feet, chlorinated rubber lacquer is ideal.

An internal coating system according to the invention for shoe sole seams is distinguished by the fact that it has a shoe holder u, a nozzle arrangement with a feed line arrangement for a coating medium that projects over the upper for insertion into the shoe, and a movement control arrangement for a relative movement of the holder and nozzle arrangement. Taking into account that the coating medium is usually to be applied in a viscous manner in a relatively thin layer and as limited as possible in the seam area, special attention must be paid to the formation of the nozzle arrangement.

It is preferably formed with at least one slot nozzle, the slot of which is at least approximately parallel to a shoe sole receiving surface of the shoe holder, the slot nozzle preferably comprising two resiliently adjacent, largely flat parts.

The design with two resiliently abutting, largely flat parts realizes a practically self-closing nozzle, in which coating medium only emerges when it is pressurized, and in which the resiliently adjacent parts spill the coating medium interrupt when the pressure in the medium is reduced.

This causes, among other things, also due to a capillary suction effect of the medium, dripping and smearing during processing between the resilient parts. as when inserting and removing the assembly from a shoe, avoided. The seams are clean and covered with the medium in a limited area. While the movement deflection in the longitudinal direction of the shoe is largely given by the length of the shoe, which can be determined in a very simple manner by scanning the effective length of the shoe, the movement component in the transverse direction of the shoe also differs from shoe type to shoe type with the same shoe lengths, given by the shape of the shoe .

In order to take this into account, it is further proposed that the movement control arrangement comprises a drive for a relative movement in a longitudinal axis of a shoe sole receiving surface of the shoe holder, and a second drive for a relative movement in the relevant transverse direction.

This makes it possible to design or control the two drives independently of one another and according to the criteria mentioned.

The second drive preferably comprises spring means acting on the nozzle arrangement, which drive them at least almost parallel to the shoe sole receiving surface of the shoe holder transverse to its longitudinal axis.

It is thus achieved that after the shoe has been applied to the shoe receptacle and the nozzle arrangement has been introduced into the inside of the shoe, the latter is spring-driven to the border formed between the upper part of the shoe and the sole of the shoe, and automatically scans this border, in which the seam region also lies, thus along this boundary is performed. To shorten the working cycle time, it is further proposed that the nozzle arrangement has two nozzles, preferably two slot nozzles, the slot of which is at least approximately parallel to a shoe sole receiving surface of the shoe holder, the slot nozzles preferably comprising two resiliently adjacent, largely flat parts, wherein the nozzles are movable from and to one another in a controlled manner transversely to a longitudinal axis of a shoe sole receiving surface of the shoe holder.

An extremely simple movement control of the two nozzles is achieved in that the movement control arrangement comprises a spring arrangement which spreads the nozzles apart.

It is thereby achieved that the two nozzles are driven to the border between the shoe sole and the upper of the shoe and automatically follow their contour when an additional longitudinal relative movement is triggered.

In order to be able to insert the nozzle arrangement through the shoe upper or to be able to remove it from the shoe upper, it is now further proposed that controllable release members are provided for releasing a spring-driven spreading movement of the nozzles. - 7 -

Taking into account that this release should not occur suddenly to prevent splashing of the medium and that for the removal of the nozzle arrangement from the shoe upper, the previously released spreading movement has to be reversed again, against the spring force It is proposed that the nozzles are each arranged on a lever, each of which can be pivoted about axes that are at least almost perpendicular to the surface, and that the release members preferably comprise a wedge device acting between the levers. The wedge device can now have a releasing or resetting effect on the nozzle arrangement, depending on the stroke direction, with which a controlled, constant and controlled spreading or spreading reset can take place.

The nozzle arrangement is preferably also resiliently tensioned against a shoe sole receiving surface of the receptacle, in order to be able to easily accommodate unevenness in the seam area in the direction perpendicular to the shoe sole.

The invention is subsequently explained, for example, using figures.

Show it:

1 is a schematic plan view of a system according to the invention, to explain its mode of operation, - 8th -

FIG. 2 shows a schematic plan view of an arrangement according to FIG. 1, with a further implementation variant of a motion control,

3 shows a schematic plan view analogous to the representation of FIG. 1, in a further embodiment variant,

Fig. 4 shows another implementation variant, shown schematically, the motion control on the

3,

5 shows a schematic side view of a preferred implementation variant of the system according to the invention,

6 is a plan view of a section of the plant according to FIG. 5,

7 each a top and side view of a nozzle on a system according to the invention, according to FIGS. 1 to 6,

8 a) - c) on the basis of a sequence the relative movements of the shoe and nozzle arrangement on a system according to the invention according to FIGS. 3 to 6. 1 shows the principle of a system according to the invention for the mechanical internal coating of shoe sole seams and the principle of the method according to the invention. A shoe 1 rests on a shoe holder 3, represented schematically by four jaws. A nozzle arrangement 5 is provided which, in order to be able to be introduced into the interior 9 of the shoe via a shoe upper 7, has a protruding configuration. It comprises a medium feed pipe 11 with a terminal nozzle 13 and an inlet-side opening 15 for a coating medium, preferably chlorinated rubber lacquer.

A coordinate system x, y is also entered in FIG. 1, where x denotes the direction transverse to the longitudinal axis L of the shoe holder 3, x the relevant transverse direction. Shoe holder 3 and nozzle arrangement 5 can now be moved relative to one another in the direction x and y, as indicated by x, y, in a controlled manner, in direction x by means of a drive arrangement 17. This drive arrangement comprises, for example, a transverse guide 19 with a transverse drive element 21, for example a hydraulic or pneumatic cylinder-piston arrangement or a correspondingly acting electrical drive. To carry out the relative movement, also in the y direction, the entire drive arrangement 17 is mounted on a drive arrangement 17 so as to be displaceable in the y direction. The latter has, for example, a longitudinal guide 23 and a longitudinal drive element 25, designed analogously to the element 21. The drive members 21 and 25 are, as indicated by the arrows S, S, each controllable. The arrangement of the drive elements shown can be implemented in a variety of ways, which are obvious to the person skilled in the art. For example, the nozzle arrangement can be moved as a fixed reference system 5 and only the shoe or vice versa, or the shoe can be moved in one component and the nozzle arrangement in the other.

In the further acts between the nozzle assembly 5 _and] _ the shoe to the shoe supporting portion 3, a drive assembly illustrated schematically 27, which move a Relativ¬ z drives between the shoe and the nozzle arrangement in the z direction, for lifting or lowering of the Düsen¬ arrangement 5 with respect to the recording 3 or the shoe.

15

The nozzle arrangement with the nozzle 13 is by the

Inserted shoe upper 7, moved into the area of the shoe tip, lowered there and then, by correspondingly controlling the drive elements 21 or 0 25, passes through the path B, shown in dashed lines, for example, along the sole seams, the z-drive element 27 in the dash-dotted line Branch B 'of the dashed path B lifts off the shoe sole ^" . Of course, if this dash-dotted branch B ^{1 is passed} through, the pressure on the pressure medium through the opening 15 can, if necessary, be reduced. While through the longitudinal extension of the shoe in the direction of the axis L the longitudinal movement deflection in the direction y is largely given during the coating process 0, vary from shoe to shoe

Shoe the curve shapes x (y) with respect to the transverse ie x-expansion of the shoe as a function of the coordinate y. Basically, however, the seam runs in the area in which the upper of the shoe is sewn to the sole of the shoe. The corner edge formed between the sole and the upper of the shoe can thus be used to control the movement of the nozzle arrangement, in particular the transverse movement x of the nozzle arrangement.

This is carried out in a very simple manner on the arrangement according to FIG. 1, as shown schematically in FIG. 2. The tube to the nozzle 13 is mounted so as to be pivotable about an axis 29 perpendicular to a plane E of the shoe holder 3, in which the shoe sole lies approximately. A spring arrangement is provided as the transverse drive arrangement 17, which comprises, for example, two compression springs 31r and 311. The spring 31 acting to the left according to FIG. 2 is supported on the one hand via a control tappet 33 on the tube 11, on the other hand on abutments 35, while the spring 31r acting on the right is supported on a control tappet 33r and also on an abutment 35 Analogous to the representation of FIG. 1, transverse drive arrangement 17 is mounted on the longitudinal drive arrangement 17 so as to be driven in a controlled manner in the y direction. When walking through the left branch of the

1, the spring 31 acting to the right is brought back by means of the control plunger 33, so that only the spring 31 acting to the left comes into effect and presses the pipe 11 with the nozzle 13 against the left-hand edge formed by the shoe upper and sole. If a relative movement between the nozzle 13 and the shoe 1 is now controlled by means of the longitudinal drive arrangement 17, then the nozzle 13 runs along the individual border of the shoe between the upper part of the shoe and the sole, thus along the seam there.

Analogously, when the right branch of path B passes through, the control plunger 31_ is pulled in, with the result that the spring 31 .. is pulled out of engagement with the tube 11 and thus becomes inactive. The spring 31 acting to the right now presses the nozzle 13 along the right edge, whereby the nozzle again follows the seam, while the longitudinal drive arrangement 17, e.g. controls a relative movement between shoe and nozzle in the opposite direction than when walking through the left branch.

1 and 2, while the left and right seam sections are processed one after the other in time, the following FIGS. 3 to 6 show a further development of the method and the arrangement according to the invention, with the left one simultaneously and the right branch of the seam according to B of FIG. 1 are run through.

FIG. 3 schematically shows a representation analogous to FIG. 1. A nozzle arrangement 5 'here comprises two and an axis 37 perpendicular to the plane E according to FIG. 2, pivoting bearings 11' each with terminal nozzles 13 '. While the longitudinal drive arrangement 17 can have the same structure, as shown for example in FIGS. 1 and 2, acts a transverse drive arrangement 17 'here spreads between the scissors-like tubes 11', as shown by the interaction in FIG. 3 on the tube axis extensions entered with dash-dotted lines. In Fig. 3 the transverse drive arrangement 17 is represented by a controlled, double-acting cylinder / piston arrangement. Although the control of the transverse drive arrangement 17 ', as illustrated with the intervention S, can be carried out by evaluating information about the shoe shape previously entered into the arrangement 0, it becomes considerably simpler in that, as shown in FIG. 4, a spring arrangement 'is provided, for example with a compression spring 39 which, in turn, the dash-dotted registered extensions of the tubes 11 in Fig. 4 to _5' on the drive assembly 17 shown acting, spreads latter auseinander¬. To the two scissor-like fashion with the Druck¬ spring 39 spread apart Mediumszuführrohre 11 'to the nozzles 13 *, for insertion through the shoe _Q stem 7 according to FIG. 3 and, after the coating to its removal from the shank 7 in closed position in the To drive the area of the axis L, a resettable release arrangement 41 is generally provided between the tubes 11 ', controlled by a generally represented signal S. For insertion through the shoe upper, the release arrangement 41 is controlled such that the tubes 11' lie in the folded position. After insertion, the release arrangement 41 is released so that the compression spring 39 drives the nozzles _Q 13 'into the seam area. After the seam has been coated, during which the nozzles 13 'are spring-driven and automatically scan the corresponding curve, the release arrangement 41 is again applied in this way. controlled that the tubes ll ^{1 are} folded back like scissors in the area of the axis L. Then the nozzle arrangement 5 can be easily pulled out of the shoe upper 7 again.

It goes without saying that the pressurization for the coating medium is controlled by the opening 15 such that the medium is pressure-driven and is only discharged from the nozzles 13 'if the latter are also above the seam area.

5 and 6 show a preferred embodiment of the system which, in principle, largely corresponds to the embodiment variants according to FIGS. 3 and 4 corresponds. On a stationary base plate 43, a carriage 45 is mounted so as to be longitudinally displaceable. It is driven by a controlled longitudinal drive element 46, such as a hydraulic, pneumatic or electrical linear drive. A shoe receptacle 47 is provided on the slide 45, which defines the plane E for the shoe sole and has clamping members 49 for at least the toe and the heel part. The different shoe lengths are taken into account by detachable design, at least of one of the clamping members 49. The controller S _is the drive is of the set 46 in accordance with between Einspannorganen 49 ein¬ shoe lengths provided manually or it is broken the instantaneous relative position of the Einspannorgane 49, as schematically indicated with the sensor 53 off keyed and, as with the Connection 51 shown, the control of the drive 46 in accordance with automatically controlled the detected current set shoe length between the clamping members 49.

The drive 46 drives the carriage 45, starting from a starting position, by a distance y resulting from the distance between the clamping members 49. _{q /} forward (+) and back (-). The nozzle arrangement 55 lying in the starting position S, introduced through the shoe upper 7 of the shoe 1, is formed by two resilient, protruding tubes 67, each of which is provided at the end with a nozzle 69 for dispensing the coating medium. The tubes 67, as shown in FIG. 5, act resiliently in the z direction and press the nozzles 69 against the sole region of the shoe 1. The protruding tubes 67 protrude further out of the shoe upper 7 in the upper region and are then at least almost back into the upper Hori¬ zontale bent where they have terminal connection piece 71 for connecting a flexible coating medium hose 73. In the area of the connecting piece 71, both tubes 67 are each pivotably mounted in a bearing block 75 about an axis 77, at least almost perpendicular to the plane E. For this purpose, an axis of rotation 79 is arranged on the tubes 67, for example, which are each mounted in corresponding bearing bores 81 in the bearing block 75. The axes of rotation 79 are bent above the bearing block 75 and form drive-side arms 83, each with two-arm lever arrangements, which are each formed by the tubes 67 and the arms 83, pivotally mounted about the axes 77. The two lever arms 83 become, since the levers are not steuer¬ cross-like, drawn together by a tension spring 85, which on both sides ^~ on the arms 83 so that the tubes 67 of- spread apart. On each of the arms 83, a drive roller 87 of a transverse drive arrangement 89 is rotatably mounted about an axis 91. A wedge 93 is driven linearly in the direction of the axis of symmetry L moveable has tapered leading edge 94, so that during the advancing of the wedge 93, the edges 94, with the rollers 87 standing in engagement, via the latter the arms 83 aus¬ einanderspreizen _'against the force of the Tension spring 85, so that the two tubes 67 pivot into the region of the axis of symmetry L.

When the wedge 93 is retrieved, the tension spring 85 pulls the arms 83 together in accordance with the roller release by pulling back the wedge 93, whereby the tubes 67 pivot outwards and resiliently lie against the edge of the sole and shoe upper. The drive of the wedge

93 takes place via a piston / cylinder arrangement 95 which is shown schematically in FIG. 5 and is connected to the bearing block 75 via a frame 97. The entire arrangement with the tubes 67 up to the piston / cylinder arrangement 95 is mounted together with the frame 97 so as to be pivotable about a pivot axis 99 on a stationary frame part 101 of the arrangement in a vertical plane, so that the tubes 67 with the terminal ones Nozzles 69, such as on a handle 103 on the bearing block 75, can be pivoted up or down. It goes without saying that the tubes 67 are preferably not formed in one piece with the nozzles 69, but that nozzle mouthpieces 107 can be plugged onto the tubes 67, with which the nozzles can be easily replaced and cleaned, and that

Lengths of the tubes 67 different shoe size classes can be customized.

7 shows a nozzle mouthpiece 107 with a nozzle 105, as is particularly suitable for use in the system according to the invention. The nozzle 105 on the mouthpiece 107 is designed as a slot nozzle and has two resiliently adjacent plates 109 to form the slot. Such a nozzle is realized, for example, by cold-pressing the tubular _Q- mouthpiece 107 at one end, the plate-like parts 109 then lying flat on top of one another tearing apart laterally as a result of the pressing load, or by previously separating a slot into it Tube is worked in and only then 5 the plate-like parts 109 are pressed together.

It is essential that the two plate-shaped sections 109 resiliently lie on one another in order to prevent dripping from the nozzle 105 when the pressure in the coating medium is reduced or interrupted. The sections 109 define a slot capillary between them in the unpressurized state, as a result of which there is a suction effect on the medium. It also shows how. 7 indicated by the arrows P in FIG. 7, the nozzle formed in this way provides an outflow of the coating medium which is ideal for the seam coating when pressure is applied.

8 schematically shows the sequence of the relative movements between the shoe and the nozzle arrangement 55 of the arrangement according to FIGS. 5 and 6. The views of the arrangement are shown on the left and the side views on the right. According to the 5 representations of FIG. 8a, the tubes 67 are also let the nozzles 69 into the shoe upper 7 from above, then or in the process guide the shoe 1 by pulling the slide 45 back in the direction indicated by -y in FIG. 5 into the optimal starting position 50 for the coating process according to FIG. 8b. The wedge 93 of FIGS. 5 and 6 is still completely retracted between the rollers 87:

The tubes 67 lie together. The nozzles 69 are placed on the sole of the shoe by actuating the vertical drive 111, as schematically shown in FIG. 5. The nozzles 69 are now in the position shown in FIG. 8b. The wedge 93 is then brought back as shown in FIG. 6, with the result that the nozzles 69 are placed in the seam area in a spring-driven manner. The shoe 1 is now advanced by means of the drive 46 in the + y direction and the nozzles 69 sweep along the seam on both sides and with respect to the shoe to the rear until the end region, usually lying approximately in the region labeled A, is reached. The escape of the coating medium which is pressurized is then interrupted and the tubes 67 with the nozzles 69 are lifted out of the shoe.

Claims

Claims:

1. A method for mechanically coating the inside of shoe soles, if necessary according to at least one of the claims. characterized in that a nozzle arrangement (5; 5 '; 55) is introduced into the shoe via the shoe upper (7), a relative movement (x; y) of the shoe and nozzle arrangement is controlled in such a way that the nozzle arrangement along the seam region (B) strokes and thereby outputs a coating medium from it.

2. The method, preferably according to at least one of the claims, as claimed in claim 1, characterized in that at least one relative movement component of the nozzle arrangement and the shoe in the transverse direction of the shoe (x). by scanning the boundary formed by the upper of the shoe on the sole.

3. The method, preferably according to at least one of the claims, such as according to one of claims 1 or 2, characterized in that one starts the relative movement for coating in the toe region.

4. The method, preferably according to at least one of the claims, such as according to one of claims 1 to

3, characterized in that the nozzle area (5 ' _j 55) is simultaneously used to sweep over the seam region (B) on both sides of the longitudinal axis (L) of the shoe.

5. The method, preferably according to at least one of the claims, such as according to one of claims 1 to 4, characterized in that chlorine rubber varnish is given as the coating medium.

6. Internal coating system for shoe sole seams, if necessary according to at least one of the claims, characterized in that it comprises:

- a shoe holder (3; 47),

a nozzle arrangement (5; 5 '; 55) projecting for insertion into the shoe via the shaft (7) with a feed line arrangement (11; 11'; 67; 97) for a coating medium,

a movement control arrangement (17; 17) for a relative movement of the receptacle and nozzle arrangement.

7. Plant, preferably according to at least one of the

Claims as claimed in claim 6, characterized in that the nozzle arrangement comprises at least one slot nozzle (105), the slot of which is at least approximately parallel to a shoe sole receiving surface (E) of the shoe holder (47), the slot nozzle preferably two resiliently adjoining, largely flat parts (109).

8. Plant, preferably according to at least one of the claims, such as according to one of claims 6 or 7, characterized in that the movement control arrangement comprises a drive (17) for a relative movement in a longitudinal axis (L) of a shoe sole receiving surface of the shoe holder (55) and a second drive (17) for a relative movement in this transverse direction.

9. Plant, preferably according to at least one of the claims, as claimed in claim 8, characterized gekenn¬ characterized in that the second drive (17x) on the

Includes spring means (31; 39; 85) which act on the nozzle arrangement and drive the former at least almost parallel to the shoe sole receiving surface (E) of the shoe holder (3; 55) transversely to its longitudinal axis (L).

10. System, preferably according to at least one of the claims, such as according to one of claims 6 to 9, characterized in that the nozzle arrangement (5 '; 55) has two nozzles, preferably two slot nozzles, the slot of which is at least approximately parallel to a shoe sole receiving surface (E) of the shoe holder (55), the slot nozzles preferably comprising two resiliently largely flat parts (109), the nozzles (69) transverse to a longitudinal axis (L) of a shoe sole receiving surface (E) Shoe holder (55) are movable from and to one another in a controlled manner.

11. System, preferably according to at least one of the claims, as claimed in claim 10, characterized in that the movement control arrangement comprises a spring arrangement (39; 85) which spreads the nozzles apart.

12. System, preferably according to at least one of the claims, as claimed in claim 11, characterized in that controllable release members (41; 93) are provided for releasing a spring-driven spreading movement of the nozzles (69).

13. System, preferably according to at least one of the claims, as claimed in claim 12, characterized gekennzeich¬ net that the nozzles (69) are each arranged on a lever (67; 83), each at least almost to the surface (E) vertical axes (77) can be pivoted and that the release members preferably comprise a wedge device (93) acting between the levers (83).

14. System, preferably according to at least one of the claims, such as according to one of claims 6 to 13, characterized in that the nozzle arrangement is resiliently stretched against a shoe sole receiving surface (E) of the receptacle (55).

15. System, preferably according to at least one of the claims, as claimed in one of claims 6-14, characterized in that a vertical drive (111) is provided for lowering or raising the nozzle arrangement on or from the shoe sole.

16. System, preferably according to at least one of the claims, such as according to one of claims 6 to 15, characterized in that the movement control arrangement is controlled by a border of the shoe sole and shoe upper.