FR2566634A1 - APPARATUS FOR NAILING THE SIDES OF AN UPPER TO A CORRESPONDING SOLE, PARTICULARLY IN MACHINES FOR MOUNTING SHOE PARTS - Google Patents

Abstract

THE APPARATUS FOR NAILING THE SIDES OF A UPPER TO A CORRESPONDING SOLE, ACCORDING TO THE PRESENT INVENTION, INCLUDES TWO AUTOMATIC NAILING GROUPS 1 ARRANGED IN A SENSITIVELY SYMETRIC POSITION AT BOTH SIDES OF A SHAPE ON WHICH THE UPPER IS THREADED. EACH GROUP ESSENTIALLY CONSISTS OF A MOVABLE HAMMER 4 ALONG A LINE OF EXTENSION OF THE SIDEWALK OF THE SHOE WHICH PERFORMS A SERIES OF PUNCHES OF SEEDS ACCORDING TO A PREDETERMINED PITCH AND LENGTH BY MEANS OF A CAM DEVICE 14 , 54 CARRIED BY A SLIDE 6, 8 WHICH MOVES IN DIRECTION SENSITIVELY PARALLEL TO THE SHOE SHAPE.

Description

-1-

  the inrvenrition pre-treatment concerns an appliance

  age for nailing the upper of the uppers to a respective sole in machines for mounting the various parts of shoes of the type comprising two groups of automatic clamping arranged in a substantially symmetrical position on both sides of a shoe shape on

which the upper is threaded.

  We know that in machines for mounting the different parts of shoes, such as uppers, casing and the like, on a sole, the problem

  the most difficult to solve concerns a correct nail-

  age of the sides of the vamps to the sole, in correspondence

  dance of the most arched area of the shape.

  In order to carry out this type of work, machines made up of two groups have been used.

  automatic nailing arranged in symmetrical position

  than on both sides of the form. Each of these groups is mounted on a mobile support structure in both vertical and horizontal directions and it comprises

  at least one stretching plate associated with a plurality of

  bed of small hammers previously arranged for ef-

  carry out automatic insertion of seeds from

  from a store above. These little hammers,

  working under fixed conditions and intervening simultaneously

  nement, must necessarily be previously

  every time you have to change the model, type or size of the shoe to be fitted. The setting of

  small hammers in turn leads to a remarkable loss

  due time on the part of the operator both because of the large number of small hammers used and because

  from the difficult access position in which

  wind the corresponding adjustment means. So it's -2-

  obvious that this type of equipment has a ne-

  negative on the finished product, especially considering the importance

  both employment of skilled labor.

  The main purpose of the present invention is to overcome the drawbacks mentioned above, using apparatus intended to nail the

  flanks of uppers to a corresponding sole of con-

  more rational concept in which the works related

  tifs can be obtained automatically by means of

  simple and above all quick adjustments.

  Another object of the invention is to implement an apparatus provided with a single hammer which,

  instead of remaining fixed on the lower edge of the em-

  comb, moves along the lateral extension of the latter performing repeating nailing according to a

not predetermined.

  These and other goals that will emerge

  more clearly from the following description are achieved

  by an apparatus intended to nail the sides of em-

  combs to a corresponding sole in machines

  to fit the shoe parts, which is characterized

  rised in that each nailing group comprises a single hammer movable along the extension line of the sidewall and effecting, in correspondence with the middle part

  sole curve, a series of seed depressions

  these according to a predetermined pitch by means of a device

cam control.

  Other features and benefits of

  the invention will emerge more clearly from the description

  Detailed description of a preferred embodiment of an apparatus intended for nailing the sides of uppers to

  a corresponding sole given below with a single

  -3- non-limiting example with reference to the accompanying drawings in which: - Figure 1 is a perspective view of a nailing group according to the invention; - Figure 2 is an exploded perspective view of some details of the apparatus in question; - Figure 3 is a perspective view of the nailing group in the working position;

  - Figure 4 is a top view of a first form-

  me of execution of the cam control device;

  - Figure 5 shows in perspective the group of nails -

  ge shown in the previous figures;

  - Figure 6 shows in perspective a group of nails -

  left ge incorporating an alternative embodiment of the present invention; Figure 7 is a perspective view of part of the right nailing group; - Figure 8 is an exploded perspective view of some details of the alternative embodiment; - Figure 9 is a top view of the details of Figure 8 assembled in conditions of start of work for the two shoes; - Figure 10 is a view similar to the previous one

  in a second working condition for a shoe

  on the right; - Figure 11 is an exploded perspective view of the

  adjustment group which automatically determines the

  purpose and end of the curved portion of the nailing line relating to the second embodiment;

  - Figure 12 shows, in perspective, the nail group

  ge shown in Figure 6 in the work phase on the

  shoe, corresponding to the side.

  Referring to the drawings, a left nailing group has generally been indicated at 1 which, associated with another substantially identical group, constitutes the apparatus for nailing the flanks of the uppers to a corresponding sole, according to the present invention. tion. This equipment is part of a machine

  to fit the various parts of the shoes comprising

  both essentially a vertical tube 70 supporting a shoe shape 2, on the heel side, and a tube

  before 71, the placement of which is adjustable, suppor-

  both shape 2 on the tip side. The tube 71 can be moved away from and towards the tube 70 by means of an adjustment handle 72 carried by a rod 73-with which is associated a kinematic mechanism, known per se and therefore not shown, which connects it to the tube 71 The shoe mounting machine has

  besides a jaw or matrix provided with movement of

  verture and closure on the heel of the form 2 of

  so as to prepare the latter for subsequent o-

  assembly operations, as well as means to perform

  kill the stretching and fixing of the upper part which forms the heel of the shoe. These organs, being known and conventional, have not been represented

in the figures.

  According to the present invention, the groups

  similarly nailing 1 are arranged in po-

  symmetrical position, on both sides of form 2 on

  which an upper 3 is threaded.

  Referring to Figures 1, 3, 5, 6 and 12,

  nailing group 1 has a single hammer, indi-

  overall in 4, which is mobile along the -5-

  extension line of the vamp of the vamp 3 and effected

  kills, in correspondence with the curved middle part of a sole 5 previously mounted on form 2,

  a series of seed depressions, as it res-

  will come out more clearly afterwards. Group I according to the present invention further comprises a support 6 which can slide on a plate 7 placed below

  and he wears a strip of bacon at his upper part

  transverse smoothing 8 mounted with its axis substantially

  perpendicular to the side of shape 2.

  According to a first embodiment, represented

  felt in Figures I to 5, the bacon 8 can be

  moved along its axis by means of a screw

  glage 9 and a pneumatic cylinder 54. It carries in

  in addition to a guide pin 10 which is integral with it.

  With particular reference to the figure

  2, a first slide I1l engages in a sliding manner

  health on bacon 8; it is provided with a passage slot 12 and a transverse housing 13 intended to

  slidingly accommodate a second separate slide

  generally indicated in 14 and forming part of a provision

  cam control device 14. More particularly, the second slide 14 consists of a first plate 16 engaging in slides 17, formed in the housing 13, and two complementary plates 18 and 19 which are fixed to the plate 16, above

this, by means of screws.

  Passage slots, suitably shaped

  me of cam and indicated in 20 -and 21 are defined as

  in plate 16 than in plates 18 and 19

  pectively, once they have been assembled between

  they. It is in these slots that the guide pin

6:

  ge O10 integral with the sliding strip 8 is intended

  born to engage, after having passed through the slot 12 of the first slide 11. To the slide 14 is connected at 22, in an articulated manner, the end of a rod 23 emerging from an actuating cylinder 24, one extremi

  tee is articulated in 25 to a mobile structure 26 so-

  of the first slide 11.

  Referring to FIG. 4, there have been indicated at 27 adjustment means for determining the working inclination of the second slide 14 relative to a vamp profile whose curvature is more or less

  accentuated. The adjustment means consist of a pair

  re nipples 28 and 29, actuated by respective screws

  of operation 30 and 31 carried by a block 32.

  In Figure 4 the second slide 14 is shown according to two different operating conditions indicated respectively in solid lines and in broken lines. It can be noted that the second slide 14 is pivoted at 33 on the first slide 11. Next if a job is to be performed

  on a right shoe or on a left shoe, that is

  say next if the nailing should take place according to a profile with more or less accentuated curvature, the actuating cylinder 24 pushes the second slide 14 against the

  nipples 28 and 29 or drag it towards you. More particularly

  in reference to the figures of the drawings an-

  nxés on which a group of nails has been represented

  left age working on a right shoe, position

  of suitable work is that shown dotted.

  Indeed, as will emerge more clearly hereinafter, a larger curvature of the hammer 4 corresponds to a condition in which the slot 21 is arranged in a straight direction, while a trajectory of the hammer 4 approaching of that straight corresponds to a condition in which the slot 21 is arranged obliquely. Still referring to FIG. 4, the plate 19 is articulated to the plate 18 on a pivot 34 and fixed to the plate 16 placed below by means of a fixing screw 35 engaging a slot

  guide 38 formed in the wafer 19. In this way

  You can adjust the relative position of the plate.

  quette 19 relative to the plate 18 allowing

  the profiled cam slot 21 to modify its configuration

  tion in order to properly nail the sides of shoes with both flat heels and heels

very tall.

  Referring to Figures 1, 3, 5, 6 and 12, on the first slide 11, in a direction transverse to its

  movement, there is an actuating cylinder 38 whose ti-

  ge 37 is connected, through an arm 74, to a block 75

  to which is pivotally connected, at 39, one of the

  mites of an actuating cylinder 40. The other end of the cylinder 40 is connected in an articulated manner at 41 to the support 6 of the nailing unit 1. In addition, a rod 42 comes out of the cylinder 40 and its end 42a is connected

  articulated to the market support structure

  teau 4. In more detail, the hammer 4 has a body

  tubular 43 in which is slidably engaged

  a rod 44 at the free end of which is

  fixed a seed distribution unit 45. The ali-

  mentation in seeds takes place through a distribution pipe

  tribution 46 in which the seeds are introduced from a store not shown. A nailing cylinder 47 is mounted on a support block 48 on which is fixed another actuating cylinder 49 whose rod 50

  is pivotally connected at 51 to a guide element

  ge 52 slidably mounted around the tu-

  ball 43 and integral with rod 44 sliding inside

  térieur of the tubular body 43 itself.

  Finally we indicated in 53 a handle intended

  to adjust the possibility of oscillation of the hammer 4.

  The following description refers to a second

  me embodiment of the invention, shown in Figures 6 to 12; the common parts of the first and second embodiments have been indicated using the same reference numbers and these have not been

  described again if not if necessary.

  As shown in Figure 8, the first layer

  smooth 11 engages slidingly on the lardon

  8; it is provided with the passage slot 12 and the lo-

  transverse housing 17 intended to accommodate in a

  smoothing the second slide 14 which in this case comprises

  fitting the single plate 16 provided with the slot 20a of a shape slightly different from the slot 20 relating to the first embodiment. The first slide 11

  is secured to plate 7 while the second layer

  smooth 14 is made integral, by means of a pin

  not shown, of a guide element 54 with a trans-

  versal placed above, provided with a respective slot

  passage 55. In the guide element 54 are engaged

  slidingly arranged a first plate 56 and a second plate 57, arranged superimposed with respect to each other. Plate 56 is provided with a slot

  58 which extends substantially rectilinearly, tan-

  say that the second plate 57 is provided with a slot 59 -g- of substantially arcuate profile, in cam. In working conditions, in all the aforementioned slots is intended to introduce the guide pin 10 which

  will only act as a guide for the cost

  smoothing of the slots 58 and 59 of the plates 56 and 57.

  A brake 60 is associated with the plate 56; his ti-

  ge, not shown in the figures, door, in corres-

  weight of its free end, an element of friction

  which keeps the plate 56 blocked at the appropriate time.

  Similarly, a brake 61 is associated with the plate 57 (fig.

  res 9 and 10); it comprises a cylinder whose rod 62

  carries, in correspondence of its free end, a

  clutch element 63 intended to lock, at the op-

  portun, the movement of the second plate 57.

  -i 5 With particular reference to FIGS. 6,

  9, 10 and 12, a block 64 is integral with the second plate

  that 57; it carries, pivoted at 22, the end of the rod

  23 emerging from cylinder 24, in turn connected to pivots-

  ment, at 25, to the guide element 54. Next, if the nailing of the vamp side is to be nailing on

  a left or right shoe, the operating conditions-

  start of plates 56 and 57 are always

  those shown in Figure g.

  The conditions in Figure 10 only occur when the nailing of the most arched part of a straight shoe begins. Indeed, as it will be

  better clarified later, the conditions of the

  gure g allow the hammer 4 to make a trajectory

  almost rectilinear roof, capable therefore of being executed along the initial edge of any shoe, while the conditions illustrated in FIG. 10 allow the hammer 4 to perform

- 10 -

  a much more arcuate trajectory and therefore

  suitable for the configuration of a straight shoe, in

its hollow middle zone.

  With particular reference to FIG. 11, the apparatus obtained according to the second form of exe

  cution is provided with automatic adjustment means

  aimed at regulating the intervention of plates 56 and 57

  with their respective slots 58 and 59 in determining

  nation of the path followed by the hammer and in particular

  ment in determining the length of the nailing stroke along the curvilinear portion of the profile of the shoe. These means essentially

  a first microswitch 65 and a second microswitch

  switch 66, which are mounted on a support 67 secured to a carriage 68. The carriage 68 can slide freely in slides 69 fixed below

  the plate 7 rigidly carried by the first slide 11.

  A pin 74 is also fixed to the support 67, to this

  the latter being connected to the end of a cable 75 whose au-

  the end is fixed to an arm 76 mounted in a rigid manner

  gide on the front tube 71 supporting the tip of the

shoe shape 3.

  For adjustment purposes, there is a pin 77 cooperating with microswitches 65 and 66, carried

  by a block 78 fixed, by means of screws, to the second neck

  smooth 14. The cable 75 always remains tensioned because of the presence of a pair of tension springs 79

  one end of which is fixed to the support 67 and the end

  mite opposite to the slides 69 (Figure 7).

  The adjustment means described above inter-

  come every time you have to change the model or the

shoe size to fit.

- I1 -

  Referring again to Figures 6, 8 and 12, there is indicated at 80 a hand wheel for operating an adjusting screw 81 which acts in abutment against a projection 82 carried by the guide element 54 of the plates 56 and 57. Because the guide element 54 is mounted, in the opposite position with respect to the projection 82, on the second slide 14 of the apparatus, a

  advancement of screw 81 causes rotation of the same element

  guide, together with a rotation of the second

  of plate 57 provided with the arcuate slot 59, so that the whole group is arranged with the slot 59

  in a less inclined position, in order to modify the

  clinching of the nailing line on the vamp 3.

  Still referring to Figures 6 and 12,

  in 83, a hand-operated handwheel was indicated.

  health on which we obtain an axial displacement of everything

  nailing group I for the purpose of performing a

  more or less internal nailing in relation to the profile of the sole. Obviously, both the handwheel 80 and the handwheel 83 can be provided with

  automatic means which control the intervention.

  Finally, 84 indicated a control flange

  of a cylinder 85 which allows a displacement stroke

  the entire nailing group I to move from work

  from a right shoe to that of a left shoe

che and vice versa.

  Also in this case the cylinder control

  can take place automatically by means of electro-

  valves or similar means, connected to the tip 71a of the front tube 710 It can be seen in FIG. 11 that the tip 71a is mounted in an oscillating manner on the tube 71; therefore, if we cause displacement

- 12 -

  lateral of the latter necessary to correctly dispose the boot in the central working position, the displacement of the point 71a automatically controls the intervention of the cylinder 85 which disposes the nailing group 1 in the appropriate position to be executed

  the start of the requested work.

  After describing the equipment in question

  tion especially from a structural point of view, its function-

  nement according to the present invention is as follows.

  Referring to the first form of execution

  tion, and in particular in Figures 1 and 3, the hammer 4 is first carried in the working position. To this end, operating fluid is admitted into the cylinder 49, which causes the hammer 4 to descend, and -in the cylinder 40, which causes the hammer to move towards the center of the machine where form 2 is located. At the same time, we

  admits operating fluid also in the cylinder

  dre 24. Fluid is admitted to the front or rear

  of the cylinder 24, that is to say the part of the rod 23 or the part of the pivot point 25, as a function of the curvature of the path on which the seeds are to be placed. In the example in Figure 3,

  as we have to work on the internal side of a shoe

  on the right, the fluid is introduced into the rear part

  of cylinder 24. In this way we obtain a re-

* erection of the second slide 14, indicated in broken lines in Figure 4, which allows the hammer 4 to perform a larger curvature. As soon as this situation is reached, the real nailing stage begins with the actuation of the cylinder 38

  which causes the hammer 4 and the cylinder to advance or dis-

  electric positive which sends, in a pre-

- 13 -

  determined, the seeds with a hammer 4. By effect of the exit of the rod 37 from the cylinder 38, the mobile structure 26, together with the second slide 14, undergoes a translational movement in a direction perpendicular to the sliding direction of the first slide 11. Because of this movement and in consideration of the fact

  that the cam-shaped slot is guided by the sleeve

  guide city 10 which remains fixed, the first slide 11 is forced to slide axially towards the form 2. As a result of this last movement, the hammer 4, while it describes a curvilinear trajectory having as pivot center the pivot 41, is driven away from the machine to the outside so that it performs perfectly on the inner side edge

of the shoe to be fitted.

  On the other hand, if a left shoe has to be fitted, the operating fluid is introduced into the cylinder 24 through its front part so that the rod 23 takes the position shown in solid lines on

  Figure 4 and the cam-shaped slot 21 appears

  clinched. In this way the hammer 4 can undergo a displacement

  almost straight line suitable for the outer edge

of the left shoe.

  While the hammer is traveling

  re described above, both in the first case and in

  the second, there is the simultaneous actuation of the device

  seed embedding. Advantageously, this

  device is controlled by a timer which deter-

  undermines the frequency of strokes or nailing strokes, that is, practically the number of seeds that are introduced during each work cycle. In this

  which concerns the length of the nailing stroke,

- 14 -

  ci is regulated by a hand wheel 86 acting on

  which limits the stroke of the hammer 4 towards the point-

shoe shape.

  Reference is made to the second embodiment shown in FIGS. 6 to 12. After having carried the hammer 4 in conditions of start of work as in

  the case described above, having to work on a support

  link right the cylinder 24 is under pressure to its part

  before so as to get the working condition re-

  shown in figure 9. When the command is triggered

  from the start of nailing, the actuating cylinder 38 pushes

  its rod 37 outside forcing the entire mobile structure

  the 26th to carry out a guided movement around the pivot 41.

  More particularly, given that together with the rod 37 also moves the second slide 14 which carries the guide element 54 with the pads 56 and 57

  etque in the slots 58 and 59 of the latter is in-

  troduit à pivotement the ankle 10 of the lardon 8, one obtains

  hold a combined movement of rotation around the pivot 41 and translation along the lardon 8 which allows ef

  nailing the vamp along the path

  desired roof. In more detail, in initial working conditions corresponding to the situation illustrated on the

  Figure 9, the plate 56 is kept blocked by the cy-

  lindre 61 while the plate 57 is free to slide

  be in the guide element 54. Because the second

  of slide 14 which carries the guide element 54 and the plates 56 and 57 moves in the direction indicated by the arrow in FIG. 9, first the movement of rotation of the mobile structure around the pivot 41 is

  compensated by a translation of the same deter-

  undermined by the sliding of the first slide 11 towards

- 15 -

  the left side of the machine. Therefore the market-

  teau 4 will be forced to execute a trajectory

  near straight. During said advancement of the cou-

  smooth 14 the anchor 77 will come into contact with the

  mier microswitch 65. During this contact, automatically, the brake 60 associated with the plate 56 is blocked and the brake 61 as well as the cylinder 24 blocking the plate 57 are released. In this situation the

  guide pin 10 will be obliged to follow the path

  roughly rectilinear roof of slot 58, while plate 57 will be free to slide, guided by

pin 10, in slot 20.

  Following the straight path of the slot 58 the pin 10 maintains the first slide 11 almost fixed and therefore all the equipment

  can freely rotate around pivot 41, which

  puts the hammer 4 to describe a more arcuate trajectory.

  When the pin 77 comes into contact with the second half

  cross-switch 66, i.e. at the end of the run-

  se nailing the arcuate part of the side, the brake 60 is released and the initial conditions of the figure

9 are restored.

  As specified above, the previously described operation refers to the intervention of a left nailing group on a right shoe, such

  as shown in figure 12. If this group were to-

  operate on a left shoe, the nailing group is brought into working start conditions acting on the tip 71a of the tube 71 which, acting on the cylinder

  85, adapts the positioning of the entire group based on

  tion of the new working condition. Therefore

  that the hammer 4 is close to the shoe of the

- 16 -

as described above.

  Note that in this case the plate

  57 always remains blocked and the plate 22 free of cou-

  smooth in the guide element 54. For the rest, the operations take place unchanged as previously described.

  The invention achieves the aims, allows

  so much to execute a perfect nailing of the sides of

  uppers on the corresponding soles in use

  sant a single hammer which, moving in a pre-

  cise along the sides of the upper, repeats

  a predetermined number of seed depressions

these.

- 17 -

Claims (11)

R E V E N D I C A T I O NS   t. Apparatus for nailing the flanks of the empei-   genes with a corresponding sole in machines for mounting the parts of the shoes, of the type comprising two automatic nailing groups (1) arranged in a substantially symmetrical position on both sides of a shoe form (2) on which an upper (3) is threaded, characterized in that each nailing group (1) comprises a single hammer (4) movable along   of the sidewall extension line and performing, in cor-   correspondence of the curved middle part of the sole (5), a series of seed depressions according to a predetermined pitch by means of a control device with cam (14, 15, 54, 56, 57).   2. Apparatus according to claim 1, charac-   terized in that each nailing group (1) comprises a support (6), a sliding strip (8) mounted on   said support (6) with its sensitive sliding axis   fully perpendicular to the side of the form (2), a guide pin (10) carried by said lardon (8) of   in solidarity and engaging in a guide slot   dage (12) carried by a first slide (11) slidably mounted on the guide strip (8) and carrying, perpendicularly to the axis thereof, a housing (13) intended to accommodate slidingly a second slide (14) which carries a shaped slot   cam (20 - 20a), which engages said peg   the guide (10), the second slide (14) being cine-   matically connected to the hammer (4) by means of connections comprising a cylinder (24) one of the ends of which   is connected to the second slide (14) and the other end   mite is articulated to a mobile structure (26) on the - 18 -   which is also articulated one end of another cylinder (40), pivoted in the center on said support (6) and connected to its other end, so   articulated, at an intermediate point (42a) of said market   sheet (4), control means of the second slide (14) carried by the support element (6), means   - adjustment to determine the inclination of the second-   slides (14), adjustment means for bringing the bacon (8) to its appropriate working position, means for bringing said hammer (4) closer and further from its working position, and means for setting in motion the seed embedding device (46) hammer (4).   3. Apparatus according to claim 2, charac-   terized in that said control means of the se-   slides (14) consist of a cylinder (38)   mounted integral with and perpendicular to the first layer   smooth (11) and whose outlet rod (37) is connected to the mobile structure (26) with which the second slide (14).   4. Apparatus according to claim 2, charac-   characterized in that said means for adjusting the inclination   of the second slide (14) have a pair of pins (28-29) acting in abutment against one side of the second slide (14), the positions of these pins   can be adjusted by means of suitable operating screws   corresponding (30-31) carried by a block (32) solidai-   re of the mobile structure (26) of the apparatus.   5. Apparatus according to claim 2, charac-   terized in that said lardon adjustment means (8) comprise a screw (9) and an operating cylinder (54) intended to axially move the lardon (8) so - 19 -   that the respective guide pin (10) of the   sliding block (14) can take the most position   suitable for a specific job.   6. Apparatus according to claim 2, charac-   characterized in that said control means intended to bring the hammer (4) closer and further away from its working position consist of a cylinder (49) intended to   vertically move the shape (2), bringing it closer   edge or away from it, the hammer (4) and another cylinder (40) intended to move the hammer   (4) horizontally from or to the shape, (2) on the- which the upper (3) is threaded.   7. Apparatus according to claim 2, charac-   In that the length of the nailing stroke is adjusted by means of a hand wheel (86) intended to limit the strokes of the hammer (4) towards the point of shoe shape.   8. Apparatus according to claims I and 2,   characterized in that the second slide (14) pivotally carries a guide element (54) transverse to   the latter in which are slidably engaged   two plates, the first of which (56), associated with a   brake (60), is provided with a substantially straight slot   line (58) and the second (57), associated with a brake (61), is provided with an arcuate slot (59), these slots engaging on said guide pin (10); automatic adjustment means also being provided for regulating the intervention on said slots (58-59) in   the determination of the trajectory executed by the market   sheet (4) and in determining the length of the path along the curved portion of the profile, as well as adjustment means for modifying the inclination - 20 - of the nailing line.   9. Apparatus according to claim 8, charac-   characterized in that said automatic adjustment means comprise a first and a second microswitch (65-66) mounted on a support (67) secured to a carriage (68) sliding perpendicular to the slide (11), a cable (75) connected to one of its ends,   in opposition to elastic means (79), said cha-   riot (68) and, at its other end, to the support tube (71) of the toe of the shoe form (2), in turn capable of moving from and towards the interior of the machine by means of a hand wheel to hand (5).   10. Apparatus according to claim 8, charac-   terized in that said brakes (60-61) include   cylinders with rods at their ends   free tee, friction and clutch elements which keep the respective plates locked (56-57) according to a predetermined sequence by means of commands given by said microswitches (65-66) which intervene when they come into contact with a   pin (77) integral with the second slide (14).   -11. Apparatus according to claim 8, charac-   terized in that said adjustment means for modifying   proud the tilt of the hammer (4) on the nail line   ge include an adjustment screw (81) capable of e-   be actuated by a hand wheel (80) and acting in abutment center the guide element (54) mounted on the second slide (14).