DE1172154B - Heel nailing machine - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: A 43 d

German class: 71 c -111/00

Number: 1172 154

File number: U 7679 VII a / 71 c

Filing date: December 23, 1960

Opening day: June 11 , 1964

The invention relates to a machine for driving fasteners into the heel seat of partially manufactured listed shoes, with a last carrier and last tenon, means for moving the shoes in a substantially horizontal direction and upwards in the working position as well with stop means to determine the distance between the fastening means and the outer edge the heel seat by restricting horizontal movement.

In the fastener driving machine designed according to the invention fasteners are used to fasten the outsole to the heel seat of the shoes driven from fiber. The driven-in fasteners, which in themselves are also used by Otherwise the usual type can form a pattern that runs along both sides and around the heel seat extends around and is a predetermined distance from the edge of the heel. The width that Radius of curvature and the length of the rectilinear part of the fastener pattern ! depend on the size of the shoe.

To determine the distance between the fastening means and the outer edge of the heel seat So far, a teaching has been used against which the operator uses the side of the shoe heel part had to hold during the work process. Because the teaching is special for every shoe size had to be discontinued, this working method was the cause of improperly made shoes as well time consuming and tiring. Since it was also left to the operator to set the initial and To determine the end point of the fastener pattern, the fastener pattern fell, in particular in shoes of different sizes, unevenly.

Compared to the known solution to the general problem, shoe lasts according to their size in relation Adjust to a working level, the invention now solves the particular problem in a Heel nailing machine measures the distance between the fasteners and the outer edge of the heel seat to be determined independently of different shoe sizes. To this end is provided in the aforementioned machine according to the main feature of the invention that the Strip carrier one with the stop for determining the distance between the fastening means and the outer edge of the heel seat by restricting the horizontal depending on the upward movement having cooperating plate.

Compared to the suggestion known per se, the paragraph nailing machine

Applicant:

United Shoe Machinery Corporation,

Flemington, N.J.,

Boston, Mass. (V. St. A.)

Representative:

Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr
and Dipl.-Ing. S. Staeger, patent attorneys,
Munich 5, Müllerstr. 31

Named as inventor:
Frank Whittier Spencer,
Beverly, Mass. (V. St. A.)

Claimed priority:

V. St. v. America January 26, 1960 (4660)

to arrange engaging surfaces of the adjustment plate and the stop in such a way that that the movement in the horizontal direction of the last support of the height of the Last carrier arranged bars is inversely proportionate, is according to a special feature of the invention provided that the engaging surfaces of the adjustment plate and of the stop are arranged such that the ratio of the horizontal direction Movement to the extent of the upward movement of the last wearer to the ratio of the radius of the Pattern of the fastening means on the heel end of the heel seat to the height of the heel part of the Last corresponds. Furthermore, according to the invention, a guide plate on the strip carrier with a Provided projection, the guide surface for adjusting the guide plate in the longitudinal direction of the Last interacts according to its size with a pin arranged in the machine frame, so that the projection and the pin, the guide plate in the longitudinal direction of the shoe and the adjustment plate and the stop pushes the last carrier in the transverse direction of the shoe as a function of the upward movement adjust the strip carrier, according to the invention, the circumferential shape of the guide plate leading to interaction with the shoe during the fastener driving process Rolls according to the pattern of the fasteners

Φ09 599/60

the can. The support arm 26 is attached to a rod 28 which extends within a frame post 30 can move back and forth.

The workpiece device 22 serves to carry 5 a shoe 34 provided with a partially manufactured shoe Last 32 and is moved upward by the arm device 24 when it is through a foot lever 36 is triggered. The workpiece device 22 is secured by a locking device 38 ίο in the in F i g. 2 locked position in which the heel seat of the shoe 34 on the abutment 20 is present. By lowering the foot lever 36, one arranged in the stand 10 is also arranged Device 40 triggered, which via a

speaks and the guide plate for receiving the
Provide the last with the last tenon and open
the strip carrier is movably arranged so that
the axis of the strip journal with an axis of rotation
the guide plate can be aligned during the fastener driving process.

In the drawing is

F i g. 1 is a side view of a fastener driving machine embodying the invention in FIG
Rest position,

F i g. 2 shows a side view of the machine in the working position,

F i g. 3 is an enlarged view of a lifting device and a locking device of the machine;
with the lifting device acting in its initial spring 42 and the rod 28 being shown during the drive-locked position, stroke of the fastener driving device 14

F i g. 4 pushes the plan view of the lifting device resiliently upwards. This on the pole

direction of the locking device and a pedal device, 28 exerted upward force causes

with a foot lever its working position and that of the shoe 34 during the pricking of the work lifting device occupies its locked position, 20 pieces and driving the pin 18 against the

F i g. 5 is a sectional view of an adjusting device abutment 20 being pressed. After the pre-cut

device 40 lifts the machine and the driving process

F i g. 6 shows a sectional view along the line VI-VI the pressure exerted on the rod 28 automatically

the F i g. 5, so that the awl 16 crosses the shoe 34

F i g. 7 shows a sectional view along the line VII-VII 25 in the for carrying out the next pre-piercing and

the F i g. 5, advance the driving process in a suitable position

F i g. 8 the plan view of the adjustment device, whereupon the device 40 moves the upward

in the working position, with certain machine parts exerting the force directed away again on the rod 28,

left and the rest position of a also in F i g. 1 The locking device 38 includes one shown on the support Last support with dashed lines 3 ° arm 26 provided slide housing 44 and one

is indicated, in the slide housing 44 movable slide 46.

F i g. 9 a sectional view along the line IX-IX. The movements of the slide 46 are indicated by a

the F i g. 8, regulated pawl arrangement known per se.

Fig. 10 is the plan view of the adjustment device. The slide 46 is with shift rods 48 and 50

device, in which an intermediate position of one of the strips 35 (Fig. 3) provided, which in opposite directions

bearing guide plate in dashed lines and gene pointing teeth. The teeth are normal

the end position of the guide plate with drawn out times with arranged in the slide housing 44-

Lines shown, pawls 52 and 54 engaged so that the

Fig. 11 is a sectional view along the line XI-XI slide 46 both against upward movements

10, 40 is also held against downward movements. There-

F i g. 12 shows a diagram of the compressed air network of the gauge with the slide 46 in the slide housing 44.

Machine and weget is to move the pawls 52 and 54 of the shift rods 48 and 50 away between the pawls 52 and 54

which is provided at its upper end with a head Ϊ2 45 of a camshaft 58 and a cam disk 56. A fastener driving device 14 is arranged, which is provided with recesses 60, provided in the head 12 and contains an awl 16 with parts of the pawls 52 and 54 in one and a driving ram, not shown. The handles stand and are designed in such a way that they have a slight ale 16 punctures a smooth rotary movement of the cam disk 56 in the workpiece to be machined Hole and pushes the workpiece in the transverse direction 50 pawls 52 and 54 triggers and moving the (to the left of FIG. 8) in such a way that the hole allows un- slide 46, and that a continued comes to lie indirectly under the driving ram, rotational movement of the cam disk 56, the pawls whereupon the driving ram pushes 52 and 54 into the hole to lock the slide 46 again drives in fixing agent. The fastening means is brought into engagement with the shift rods 48 and 50, is made of fiber, such as. B. Paper, which is on a 55 The turning of the cam plate 46 is by Abnicht shown roll wound and caused to pins 18 moving the foot lever 36 downward, wherein a (Fig. 10) is cut. The awl 16 and rod 62 (Fig. 1) is moved down, and a Drive rams are moved by cams, and links 64 on rod 62 are one as well Pins 18 are supplied after a block of nails, indexing disk arranged on camshaft 58 which turns in a known manner with the driving ram to- 60 66 (Fig. 3) to the desired extent, cooperates. The head 12 of the machine also has at the beginning of the downward movement of the foot pedal an abutment 20 (Figs. 1 and 2) against which the 36 pawls 52 and 54 are temporarily removed from the workpiece released during fastener driving to cause slider 46 to move upward and Operation is pressed. the shoe 34 is pressed against the abutment 20

The machine is equipped with a workpiece carrying device. The continued movement of the

device 22 and a lifting device 24, foot lever 36 is the slide 46 within the

which are arranged on a support arm 26 and locked ent- slide housing 44 again, whereupon the

for a long time this is displaced in the vertical direction by the device 40 on the rod 28

13 is a circuit diagram of the machine.

The machine has a stand 10 (Figs. 1 and 2),

upwardly directed forces are exerted on the workpiece support device 22 via the locking device 38.

To unlock the locking device 38 as a function of an upward movement of the foot lever 36, a rod 68 is provided which is connected to the foot lever 36 and carries a connecting member 70. The connecting link 70 is pivotably arranged (at 72) on the rod 68 , carries a pin 74 in its upper end and is urged in the direction of the switching disk 66 by a spring 76 which acts on a finger 78 of the connecting link 70. The link 70 is arranged so that the pin 74 is moved past the indexing disc 66 on the downward movement of the foot lever 36 without affecting the clockwise rotational movement imparted to the indexing disc 66 by the connecting member 64. The pin 74, however, occurs with the indexing disk 66 in engagement when the pedal 66 is moved upward, and rotates the shift cam 66 in a clockwise direction, so that the slider 46 is temporarily released, and a downward movement of the slide 46 and the workpiece support device 22 allows.

The workpiece carrying device 22 contains a carrier 79 (FIG. 1) arranged on the slide 46, on which an adjusting device 80 is provided and can slide into and out of the working position in which the adjusting device 80 is located below the fastener driving device 14. The adjusting device 80 includes a support block 82 and a ledge support 84 mounted therein. The ledge support 84 is rotatable in the support block 82 and movable with respect to the support block 82 in a predetermined direction. An inner portion 86 (Figs. 5 and 6) of the ledge support 84 has a shaft 88 which extends into an opening of the support block 82 and is rotatable therein. A guide plate 90 of the strip carrier 84 is slidable in the transverse direction (to the left in FIGS. 5 and 6) on the inner part 86 by a predetermined distance against the force of a spring 92. So that the strip carrier 84 is brought into a predetermined position with respect to the machine, a spiral spring 94 is provided in the support block 82. One end of the coil spring 94 is attached to the support block 82 and the other end of the coil spring 94 is connected to the shaft 88 so that the bar support 84 is under a load tending to rotate it in the counterclockwise direction. A protrusion 96 on the guide plate 90 cooperates with a stop 98 on the support block 82 so that the guide plate 90 is normally in the position shown in FIG. 6 is held in the position shown.

The guide plate 90 is provided both with a strip pin 100, which is received in a strip pin recess 102 of the strip 32, and with a pair of adjustment pins 104 . The adjustment pins 104 are slightly removed from the ledge peg 100 and cooperate with an adjustment plate 106 (FIG. 2) on the ledge 32 to adjust the ledge 32 on the guide plate 90 and rotate together with the guide plate 90.

The strip pin 100 has a through hole 108 which is connected to a connection 110 (FIG. 7) via passages in the shaft 88 and in the support block 82. The guide plate 90 is provided with an opening 112 which is arranged in such a position that it is closed by the adjusting plate 106 when the strip 32 is applied to the strip pin 100. The opening 112 is connected to a connection 114 .

For precise adjustment of the shoe 34 according to its size in relation to the fastener driving device 14, it is expedient to use geometrically graduated strips 32 in which the height of the heel parts of strips 32 of different sizes are in a certain ratio to the dimensions of the heel seat and in which the last pin recess 102 is perpendicular to the plane of the heel seat and is located in the center of the curvature of the rear part of the heel seat. If the height of the heel portion of the last 32 is proportionate to the dimensions of the heel portion, then ratios between these dimensions can be divided so that the width or length of the heel portion of the shoe 34 of any size is determined from the height of the heel portion of the last 32 of that size can. These relationships are used in the machine to adjust the shoe 34 and to regulate its movements.

To adjust the shoe 34 in the transverse direction in the machine, ie in a direction running perpendicular to the center line of the heel part, and to determine the distance between the fastening means 18 and the heel edge, an adjusting plate 116 (FIGS. 1, 2 and 7) is attached to the support block 82. intended. The setting plate 116 interacts with a stop 118 arranged on the stand 10 . The engaging surfaces of the adjusting plate 116 and the stop 118 form an angle "^ 4" with the direction of movement of the support block 82 (see FIG. 7). When the adjuster 80 is moved inwardly along the bracket 79 and upwardly by the elevator 24 so that the heel of the shoe 34 is pressed against the abutment 20 , the amount of inward movement of the shoe 34 depends on the amount of sliding movement of the adjustment plate 116 along the stop 118 , and the extent of this sliding movement is in turn determined by the height of the heel part of the last 32. Because of measured radius of the heel seat drain line of the last 32 of the size in question is from the axis of Leistenzapfenausnehmung 102 32 of any size to the height of the heel part of the last in a specific ratio, it is desirable that the ratio of the inner movement of the last 32 of the upward movement Last 32 corresponds to the ratio of the radius of the heel seat less the distance between the fastener pattern and the heel edge to the height of the heel part of the last 32. As a result, the angle "A " of the adjustment plate 116 is determined by calculating the tangent of the height of the last 32 and the radius of the fastener pattern at the rear of the heel. The height of the heel part of a geometrically graduated last 32 of a size which is referred to as "X" in the following is 6.208 cm, while the radius of the heel end part of this last 32 is 2.992 cm long. This radius corresponds to the distance between the axis of the ledge pin recess 102 and the heel seat drain line. If between the pattern of the

7 8

Fastener 18 and the drain line is a distance 142 left along the two side edges 132 of 0.318 cm, then the half and 134 and around the heel end 136 of the fastener pattern is 2.674 cm. In- A number of arranged in the machine frame is the tangent of the angle "A" neten rollers 144 (Fig. 8 and 10) act with the 6.208 cm divided by 2.674 or 2.322 cm, and the 5 guide surface 142 for guiding the guide plate angle " A « is about 67 °. 90 together in their trajectory. The axes for adjusting the guide plate 90 in the longitudinal direction of the rollers 144 run parallel to the guide direction of the shoe 34 in accordance with its size area 142.

There is a protrusion 120 (Figs. 1, 2, 6, 7 and 8) so that the rollers 144 are not provided by the guide of the side of the guide plate 90, the plate 90 is usually damaged when the adjuster is previously facing the machine. The device 80 for introducing the shoe 34 in jump 120 has an inclined guide surface 122, the working position is moved, the rollers 144 are arranged with the plane of the transverse movement of the guide plate that the guide plate 90 from the rollers 90 an angle of 5 «(Fig. 9) forms. A pin 124 144 is about 0.125 mm to 0.2 mm away when it is arranged in the machine frame such that the adjustment plate 116 with the stop 118 engages in one with the guide surface 122 when grip occurs. Although this distance upward of damage to the rollers 144 is pressed against the abutment 20 for preventing the shoe 34 through the Fühbewegt, so that the guide plate 90 approximately in the longitudinal plate 90 is sufficient, this distance affects the direction of the shoe is moved 34th However, the uniformity of the fastener on the side of the heel seat, which is under the control of the guide plate 90, extends up to the heel front drive-in means pattern.

As already indicated, the shoe 34 is matched to the upward movement of the fastener driving process from the right of the guide plate 90 during the guide plate 90 so that this movement to the left, as shown in FIG. 8 and 10, steps in the same relationship to one another are 35 advanced. Since the point at which the pushing force is exerted on the shoe 34, such as the distance between the heel front line, is removed from the axis of the last pin recess 102 and the axis of rotation of the last support 84 , a torque is generated at the height of the heel part of the last 32. As a result The angle "B" can be determined by pivoting the carrier 84 about its axis of rotation. The fact that the tangent from the height of the heel part 30 adjustment device 80 is held firmly against the on- last pin recess 102 by the heel front impact 118 during the last 32 and the removal of the axis of the fastening means driving process, and the side of the guide plate line is calculated will. The last 32 of size 90 is in contact with the rollers 144, so that "X" is the distance of the heel front line from a rotation of the last carrier 84 during this the axis of the last pin recesses 102 35 part of the fastener driving process is not 3-856 cm, and the height of the heel part of the last can occur. Thus the effect of the 32 is 6,208 cm. Thus, the tangent of the fastener driving device angle 14 is exerted> ^ £ ?; 6.208 cm divided by 3.856 or 1.610 cm, and feed movements during this part of the angle "/?" Is approximately 58 °. Fastening means driving process only a Be-A projection 4.0 corresponding to projection 120 because of the guide plate 90 in the transverse direction on the 126 is on the other side of the guide plate 90 inner part 86 of the strip carrier 84, whereby the spring is arranged and has a guide surface 128 92 tensioned and the fastening means 18 in one (FIG. 11) which runs parallel to the guide surface 122 along the straight line on the left, ie the inside. The guide surface 128 acts with a switching of the heel seat to be driven. The movement of lever 130 of a switch 54 (FIGS. 8 and 10) to 45 of the guide plate 90 in this way continues together to continue the fastener driving process until the projection 138 switches off the stop 140. touches on the inner part 86. At this point in time, the guide plate 90 has a desired alignment of the axis of the last pin 100, which represents the circumferential center of curvature of the heel end 136 corresponding to the fastening means pattern and is thus with two parallel side edges 50, with the axis of the last support 84 - 132 and 134 (Fig. 5) and a semicircular the shaft 88. Then rotate the feed heel end 136 provided. As already mentioned, movements of the fastener driving device can move the guide plate 90 under the influence of the guide plate 90 around the axis of the strip fastener driving device 14 in transverse pin 100, so that the fastener 18 detention (to the left of FIGS. 5, 6 , 8 and 10) on the 55 long of the heel part of the shoe 34 driven support block 82 are moved. The extent of this will be. Here, the radius of curvature movement is limited by a projection 138 (Fig. 5 of this part of the fastener pattern by the and 6) on the guide plate 90 and a stop position of the guide surface 142 in relation to that on the inner part 86. The projection defines rollers 144 (see FIG. 10). If the fastening and the stop 140 are arranged so that the medium driving process has been continued to the other side of the center of the semicircular heel end heel, the Ϊ36 is when the projection 138 is in contact with the stop side edge 134 of the guide plate 90 on engages, is located within the axis of rotation of the rollers 144 and prevents further rotation of the guide plate 90. The side surface of the guide plate 90 forms with 65 fastening means driving device 14 the axis of the ledge pin 100 exerted an angle of advancement movements, the guide plate 90 becomes "A": the angle corresponding to the adjustment plate 116 , then again across the support block 82 so that the guide plate 90 moves a guide surface to the left, so that the fastening means 18

be driven in a straight line along the right side of the heel.

As soon as the guide surface 128 touches the switch lever 130 and closes the switch 54, the fastener driving process is ended, since the switch S 4 releases the pressure with which the workpiece support device 22 is raised and causes the adjustment device 80 to be returned to its starting position. Since the spiral spring 94 has been tensioned as a result of the twisting of the strip support 84, the strip support 34 is then returned to its starting position in a clockwise direction. The actuation of the setting device 80 in and out of the working position below the fastener driving device 14, the lifting device 24 and the device 40 are controlled so that the entire working cycle of the machine runs automatically after the operator has applied a strip 32 to the strip pin 100.

The movements of the support block 82 along the carrier 79 are brought about by a piston P1 (Fig. 2) which is located in a cylinder C1 (Fig. 1) arranged on the machine frame. The Wrekstücktragvorrichtung 22 is moved by via a terminal A 1 on one side of the piston P1 pressure acting in the working position and guided by a terminal Bl to the other side of the piston Pl pressure acting in its rest position. The workpiece support device 22 is moved upwards by means of a piston P 3 which is located in a cylinder C 3 connected to the slide housing 44 and is connected to the carrier 79. When pressure is applied to the underside of the piston P 3 via a connection A 3, the workpiece support device 22 is moved upward into the working position and returned to its lower position as soon as the upper side of the piston P 3 is acted upon via a connection B 3.

The upward and downward movements of the foot lever 36 for actuating the locking device 38 and for triggering and stopping the operation of the fastener driving device 14 are caused by a cylinder C 2. To lower the foot lever 36, pressure fluid is passed through a connection A 2 to the top of the piston P 2, while the upward movement of the foot lever 36 is exerted by means of pressure fluid flowing through a connection B 2 to the bottom of the piston P2 \.

The movements of the pistons P1, P 2 and P 3 and the machine parts assigned to them are determined by the in FIG. 12 and regulated by the electrical circuit diagram shown in FIG. When a motor M (Fig. 13) of the fastener driving device M operates, a transformer T is energized and a compressed air line 5 (Fig. 12) is pressurized, then the circuit diagram is in the state shown in Fig. 13, while the parts of the Compressed air network assume the positions shown in FIG.

'A pressure regulator PR 1 allows the flow of compressed air under reduced pressure of the compressed air line 5 to the opening 112 and to a normally open pressure switch Sl (Fig. 12). Since the compressed air continuously escapes from the opening 112, the pressure acting on the pressure switch S1 is usually so low that the pressure switch S1 remains open. A reversing valve Vl displaceable by a solenoid Ll is normally in the position shown in FIG. 12, in the compressed air to hold the adjusting device 80 in the rest position by a control valve SV 2 after the connection B1 of the cylinder Cl and to hold the foot lever 36 in the upper position after the connection B 2 of the cylinder C 2 can flow. When a reversing valve V3 displaceable by means of a solenoid L 3 assumes its starting position shown in FIG. 12, pressure fluid can flow through the connection S3 into the upper part of the cylinder C3 and guide the piston P 3 in the lower position. A solenoid L 4 is provided to move a valve V4 out of its position shown in FIG. 12, in which compressed air cannot flow into the through-hole 108 of the strip pin 100.

Mode of action

The working cycle of the machine is triggered by the fact that the operator places a shoe 34 on the last pin 100 and thus prevents the compressed air from flowing out of the opening 112. As a result of the resulting pressure increase in the pressure control valve Pi? 1 connected line, the pressure switch 51 is closed and the solenoid Ll is excited (see. Fig. 13). So that the magnetic coil L1 remains in the excited state during the entire working cycle of the machine, the pressure switch S1 also influences a relay R1 which closes a switch SR 1 arranged parallel to the pressure switch 51. Thereafter, any changes in the pressure in the line connected to the pressure control valve PR 1, which could otherwise cause the pressure switch 51 to open temporarily, are unable to relieve the solenoid Ll , since the circuit containing the solenoid Ll remains closed via the switch SRI.

By energizing the solenoid Ll, the reversing valve Vl is shifted to the left of the position shown in Fig. 12, so that the connections Bl and B 2 are connected to a relief line and the pressure fluid through the connection Al into the cylinder Cl and to a control valve SVl can flow. The control valve 5Fl remains in the closed position until the pressure prevailing in the compressed air line 5 acts on the control valve 5Fl. Since the compressed air flows through the connection A1 into the cylinder Cl and moves the piston Pl into the right end of the cylinder Cl and moves the adjusting device 80 into the working position shown in FIG 5Fl connecting line during this part of the work cycle of the machine is somewhat lower than the pressure existing in the pressure line 5. The control valve 5Fl thus remains in the closed position. As soon as the movement of the piston P1 stops when the setting plate 116 touches the stop 118, the pressure in the line connecting the control valve 5Fl to the compressed air line 5 increases to a value corresponding to the pressure in the compressed air line 5 and moves the control valve 51 out of its closed position . As a result, hydraulic fluid can then flow through the connection A 2 into the cylinder C 2 and move the piston P 2 and the foot lever 36 downwards. Through the

409 599/60

Downward movement of the foot lever 36 and the devices associated therewith triggers a number of different processes in the following sequence: The compressed air flows through the connection A 3 into the cylinder C 3, and the lifting device 24 is unlocked so that the piston P 3 is in the cylinder C 3 the adjustment device 80 upwards and the shoe 34 can move against the abutment 20. The lifting device 24 is then locked again, so that the pressure exerted by the device 40 via the locked lifting device 24 is transmitted to the setting device 80. The compressed air is then admitted through the connection B 3 into the upper part of the cylinder C 3, and the actuation of the fastener driving device 14 is triggered.

As shown in Fig. 4, the rod 68 is with a sleeve 146 which has a shoulder 148 and a guide surface ISO. A switch S 3 (see also Fig. 13) is arranged in the machine frame and provided with a switching lever 152, the during the downward movement of the rod 68 through the guide surface 150 to close the switch 53 is adjusted. The shift lever 152 has an end portion 154, which can be pivoted about a pin 156, but can only be pivoted upwards. After this the guide surface 150 of the sleeve 146 during the downward movement of the foot lever 36 and the rod 68 has adjusted the switch lever 152, the switch 5 3 is held closed by the sleeve 146 until the shoulder 148 moves past the end portion 154 of the switch lever 152, whereupon the switch 5 3 is opened again. When the rod 68 then moves upwards, the shift lever becomes 152 not adjusted, since the shoulder 148 of the sleeve 146 pivots the end part 154 upwards, without closing switch 5 3.

Closing the switch 5 3 on the downward movement of the foot lever 36 energizes the solenoid L 3 which moves the reversing valve V 3 to allow compressed air to flow through the port A 3 into the cylinder C 3 and move the piston P3 upwards. The lifting device 24 wkd released at about the same time so that the piston P 3 can move the carrier 79 and the adjustment device 80 upwards until the shoe 34 is in engagement with the abutment 20. While the piston P 3 moves the adjusting device 80 upwards, the compressed air in the cylinder Cl causes the adjusting device 80 to be guided inwards so that the adjusting plate 116 is continuously pressed against the stop 118 and the shoe 34 is in its working position according to its size is held.

With the continued downward movement of the foot lever 36, the connecting link 64 passes the switching disk 66 (see FIG. 3). As a result, the lifting device 24 is locked again and the action of the fastener driving device 14 is triggered at the end of the downward movement of the connecting link 64 by the upward movement of a rod 162 (FIGS. 1 and 2). The rod 162 causes a clutch, not shown, for the fastener driving device 14 to be engaged. The fastener driving process then proceeds, with the last carrier 84, in cooperation with the rollers 144, guiding the shoe 34 in its trajectory. During the course of the fastener driving process, the pressure in the upper part of the cylinder Cl for holding down the foot lever 36 and in the left end of the cylinder Cl for pressing the adjusting device 80 against the stop 118 is maintained. After the sleeve 146 on the rod 68 has been moved past the switch lever 152, the switch becomes

53 is opened again and the solenoid L 3 is relaxed so that the reversing valve V 3 can return to its starting position and compressed air can flow through the connection B 3 into the upper part of the cylinder C 3. Thus, the piston P 3 is then under a pressure which seeks to move the adjusting device 80 downwards. However, the downward movement of the adjustment device 80 cannot take place at this point in time because the lifting device 24 is blocked.

As soon as the guide surface 128 comes into engagement with the switching lever 130 of the switch 54, the fastener driving process is switched off. As can be seen from Fig. 13, closing the switch 54 causes a relay R 2 to be energized. That. Relay R 2 closes a switch 5Ä 2, which is arranged in parallel with switch 5 4, so that the switches

54 and SR 2 associated circuits remain live, although the switch 5 4 is only kept closed for a short period of time by the guide surface 128. By closing the switches 5 4 and 5 2, a normally closed switch STR 1 regulating time relay TR 1 is energized. The switch STRL is opened instantly when the timer TR is energized 1, and is deactivated after the lapse of a predetermined time period after the decompression of the timing relay TR 1. Since the energizing of the timing relay TRI opens switch STR1 immediately be of the solenoid coil L1 containing Current circuit and the bridging circuit assigned to it are de-energized. As a result, the reversing valve VX returns to its starting position, in which compressed air can flow through the connection B 2 into the cylinder C2 and to the control valve SV2. Thus, the piston P 2 is moved upward within the cylinder C 2 to raise the foot lever 36. The upward movement of the foot lever 36 first interrupts the action of the fastener driving device 14 and then triggers the locking device 38, since the upward movement of the foot lever 36 is transmitted to the rod 68. At this point the top of the cylinder C 3 is already under pressure so that the piston P 3 and the adjustment device 80 are moved downwards and disengage the shoe 34 from the abutment 20 as soon as the lifting device 24 has been unlocked.

With the continued upward movement of the foot lever 36, the locking device 38 is actuated again and, when the piston P 2 reaches the end of its downward stroke, the pressure in the line connecting the control valve SV 2 with the reversing valve Vl increases to the value of the pressure in the compressed air line 5. As a result, the control valve SV 2 is opened, the compressed air flows through the connection Bl into the cylinder Cl and moves the piston Pl into the left end of the cylinder Cl, the adjustment device 80 being returned to its rest position on the carrier 79.

When the adjuster 80 reaches its rest position, a protrusion 158 (FIG. 2) actuates on the

Setting device 80 a switching lever 160 of a normally open switch S 6. The circuit containing the switch 56 (FIG. 13) is still under voltage at this point in time, since the switch Si? 2 is closed and the switch S 4 is bridged. Thus, the solenoid coil L 4 and a timing relay TR 2 are energized by closing the switch S 6.

The solenoid L 4 actuates the valve V 4 so that compressed air can flow through the connection 110 on the support block 82 into the through hole 108 of the last pin 100 so that the shoe 34 and the last 32 are blown off the last pin 100 and into a not shown Containers fall. The timing relay TR 2 regulates the operation of a normally closed switch STR 2, which is opened after a period of approximately one second has elapsed after the timing relay TR 2 has been energized, and closes again immediately when the timing relay TR2 is unloaded. As a result, the switch STR2 is opened about 1 second after the timer TR 2 is energized. Since the circuit containing the magnetic coil L 4 is interrupted by the opening of the switch STR 2 , the valve V 4 returns to its starting position and interrupts the flow of compressed air flowing through the strip pin 100. By opening the switch 5Ti? 2 the in F i g. 13 brought back the electrical circuits shown in their initial state by the time relay TR 1 is relieved, whereupon the switch STR 1 closes again. Furthermore, the relay i? 2 to open the switch Si? 2 and the timing relay Ti? 2 relieved to close the switch STR 2. Thereupon all circuits are again in their initial state and all valves in their starting positions, so that the machine can carry out another work cycle.

As in Fig. 1 and 2, the plane of movement of the adjustment device 80 is offset from the horizontal by approximately 5 °, since it is desirable to drive the fastening means 18 obliquely into the heel seat. As a result of the inclination of the last pin 100 generated in this way, the enlisted shoe 34 is given an outward movement component when it is blown off the last pin 100 at the end of the machine's working cycle.

Claims (5)

Patent claims: 1. Machine for driving fasteners into the heel seat of partially manufactured listed shoes, with a last carrier and last pin, means for moving the shoes in a substantially horizontal direction and upwards in the working position and with stop means for determining the distance between the fasteners and the outer edge of the Heel seat by restricting a movement taking place in the horizontal direction, characterized in that the strip support (84) has a plate (116) which cooperates with the stop (118) by restricting the horizontal as a function of the upward movement. 2. Machine according to claim 1, characterized in that the engaging surfaces of the adjusting plate (116) and the stop (118) are arranged such that the ratio of the movement taking place in the horizontal direction to the extent of the upward movement of the strip carrier (84) corresponds to the ratio of the radius of the pattern of the fastening means (18) at the heel end of the heel seat to the height of the heel part of the last (32). 3. Machine according to claim 1 and 2, characterized in that on the strip carrier (84) of the strip pin ( 100) - for aligning the strip pin axis with a guide plate pivot axis during driving of the fastening means (18) - movable on a guide plate (90) (Figures 5, 6, 8 and 10). 4. Machine according to claim 1 to 3, characterized in that the guide plate (90) - for adjusting also in the longitudinal direction of the shoe according to the last size and thus depending on the upward movement of the last carrier (84) - has a projection (120) , the guide surface ( 122) a pin (124) fixed to the frame is assigned (Fig. 6, 7 to 10). 5. Machine according to claim 1 to 4, characterized in that the guide plate (90) - for cooperation with the shoes (34) during the driving of the fastening means (18) leading rollers (144) - has a circumferential shape corresponding to the fastening means pattern (F i g. 1, 2, 6, 8 and 10). Considered publications:
German patent specifications No. 287 639, 826 111, 1077570;
U.S. Patents Nos. 1,440,190, 1,849,253, 2,264,416. Earlier patents considered:
German Patent No. 1122 412. In addition 3 sheets of drawings 409 599/60 6.64 © Bundesdruckerei Berlin