DE1485929A1 - Lasting machine - Google Patents

Description

PATENTANWALTDiILD-IiC) UIS 1 / .RRQ9Q

85 NUREMBERG Gri ^ Fels * rasse 23 'Λ ■ _;

Tetefeh 0911/58176 Telegram »·: Kurgpatent

64 / 6688.89 10 / P (B)

Company Eugen G. Henkel machine factory, Neu-Isenburg

Zwickmas chine

The invention relates to a lasting machine with slip-on shears for lasting the front part of the shoe and other tweaking tools for tweaking the bale and possibly also of the joint, these lasting tools being extensions of the sliding shears represent. In the known lasting machines of this type, the scissor extensions are during the lasting rigidly connected to the slip-over scissors, so that the angle at which the scissor extensions from their Swiveling the (swiveled out) starting position in the direction of the strip center plane, the swiveling angle corresponds to the overseas scissors. This has to begin with the disadvantage that the leather in the ball of the foot is not pushed towards the tip of the shoe to such an extent that a neat lasting work can be carried out in the joint. Will the shoe in the well-known Machines only tweaked up to and including the bale, then it is often necessary after the partially tweaked bale has been removed Shoe out of the machine part of the during

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Zwicken created the bond between the upper edge (lasting impact) and the insole to separate the To subsequently pull leather so far towards the tip of the shoe that a perfect pinching of the joint is possible. A Another disadvantage of the known lasting machines is that they eire adaptation of the Kinschwenk Maßes of the scissor extensions Do not allow the width of the joint. With a wide joint (as is the case with men's shoes) In principle, it would be desirable to swivel in the ends of the scissor extensions reaching into the joint more strongly than is possible with a narrow joint. This would also require the scissor extensions Swivel in at a larger angle than the slide-over scissors, but this is the case with the known lasting machines is not possible with scissor extensions.

The invention is based on the object of creating a lasting machine with elongated scissors, which does not have the aforementioned disadvantages. To solve this problem, the invention proposes that the scissor extensions than at least temporarily independent of the pull-over scissors during pinching Zwick-WB3 tools that can be swiveled in towards the center plane of the strip and these drive means are assigned to perform the independent pivoting movement.

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With such a lasting machine, the scissor extensions can not only reach the middle plane but also Swing in towards the tip of the shoe, whereby the shaft material is reeved towards the tip of the shoe and the Last fold in the ball of the foot can also be pushed forward, i.e. towards the tip. This creates the prerequisite for the (part) pinched on the machine according to the invention Shoe can then be pinched immediately further in the joint without the gluing that has already taken place between Last impact and insole in the ball area would have to be partially loosened again.

The working principle proposed by the invention is a Zwick machine can be realized constructively in many ways. An embodiment of the invention Machine is shown in the drawing, where show:

Figure 1 is a plan view atf the essential part of the invention the lasting machine, with the lasting tools in the starting position (rest position),

FIG. 2 shows a representation corresponding to FIG. 1 with the change that the lasting tools are in the working position are swiveled in,

Figure 3 is a view of the machine in the direction of arrow A in Figure 2, ^ a ¹ T

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FIG. 4 shows a section along line IV-IV in FIG. 2 and FIG. 5 shows a section along line V-V in FIG.

The parts of the lasting machine shown in the drawing " are only described in detail below to the extent that they are important for explaining the invention.

On the working end of a piston rod 1, which via a not shown - is operated pressure medium cylinder, a ^ sitting uerstück 2 on which is mounted the one end of the two links J>. The 'camp for the other end of the handlebars 3 is located on the slide bars 25, to which the slide shears 4 are attached to pinch the front part of the shoe. The two scissors interlock in an articulated manner at their end located in front of the tip of the shoe (at 5). On the upper side of the slip-on carrier 2, two rollers 6, 7 are mounted, each of which ^{is guided in a cam slot 6 1} or 7 ^f, which is incorporated into the underside of the cam plate (bed plate) 8.

At their end near the bale, the scissors 4 have a recess 9 which forms the bearing for a bolt 10 on which an angle piece 11 is freely rotatably arranged. This "elbow has a leg 11 *, which with his

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the edge facing the strip center plane forms an extension of the working edge 4 ^{f of} the sliding shears 4. The other leg 11 »» of the arm part 11 is connected to the drive for the independent pivoting movement of the scissor extension 11 * with respect to the scissors 4. The drive means are described in detail below.

A plurality of leaf springs 12 are fastened to the scissor extension 11 * in the manner shown in FIGS. 4 and 5. The individual springs are screwed to the underside of the scissor extension 11 * (screw connection 13). From the spring leg 12 * serving for fastening, ^{a working leg 12 ″ is bent off in front of the edge of the scissors extension II 1} facing the last, which comes to rest when the lasting tool is retracted against the base of the last or the material parts (insole, lasting impact) resting on it Working spring leg 12 ¹¹ runs from the bending point 12 *** increasing at a distance from the scissor extension 11 *, so to this in the pointed ¥ angle. From the comparison of Figures 4 and 5 it can be seen that the steepness in the course of the spring leg s The steepness increases from the spring closest to the end of the scissors to the spring furthest from the end of the scissors at the bending point 12 "" of the springs

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12 chooses larger and larger towards the joint. As a result, the working surface of the lasting tool formed by the entirety of the working spring legs 12 "is roughly adapted to the blasting of a last in order to ensure a firm pressing of the lasting impact against the insole by each working spring leg 12" in any case. When setting the slope of the work-spring leg 12 "will be assumed expediently from the greatest blast, which occurs in practice. The differences ^ in detonation between the individual strip or. Shoe types is determined by the resiliency of the functional limb 12 ^W of Springs 12 balanced.

The springs 12 are arranged so that only their working legs 12 "overlap, creating a closed working surface is formed.

As already mentioned, the drive for the independent pivoting movement of the scissor extension II ^{1 is} connected to the leg ll ^{w of the angle part 11.} For this purpose, a lever 14 engages on the leg 11 ^w , which by means of its hub 70 sits freely pivotable on an axis 15, which in turn is positionally connected to a bracket 18 rigidly connected to the scissor support plate by the screw connection 17.

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is firmly mounted (Figure 3). The lever 14 is designed as a fork at its free end. Here is the fork jaw 14 * integrally connected to the lever 14, while the other fork jaw 14 ″ is attached to the lever 14 by the screw connection 19.

The fork jaws 14 * | 14 ^ft include a roller 20, the

with the interposition of a sliding ring 21 on a -

Pin 22 of a cap screw designated as a whole with 23 sits freely rotatable (FIG. 3). The roller 20 is, as from FIG. 3 can be seen, guided between the head 24 of the screw 23 and the angle part 11 into which the screw 23 is screwed in.

The from the Viinkel part 11 and the screw 23 with the Roll 20 existing unit is between the slip-on carrier 25 or its extension 25 * and one through the Screw connections 26 connected to the curve plate 8 "

Extension piece 27 out. When loosening the screw 19 and removing the fork jaw 14 "from the lever 14, the angle part 11 can be pivoted out of the guide between the extension piece 27 of the cam plate 8 and remove the extension part 25 * of the slip-on support 25.

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On the lever I4 acts a push rod 30, which in a Guide 29 is slidably mounted. At the end of the push rod 30 facing the lever 14, a fork 31 is provided, which forms the bearing for a roller 32 seated on the axle 33, by means of which the entire thrust member 30 against a contact surface or edge 34 of the lever 14 to Plant is coming. On the fork 31 is through the two screws 35 a sheet-shaped or strip-shaped guide part 36 attached, which can slide in a groove 37 provided on the outside of the guide 29. This is supposed to the push rod 30 against rotation in the guide 29 and thus a sliding of the roller 32 from the contact surface 34 of the lever I4 can be avoided.

The guides 29 of the thrust members 30 provided on each side of the machine are arranged at right angles to the median plane the machine extending shaft 38 connected. For this purpose, the shaft ends are each in a hole 40 a bend 29 * of the guides 29 by means of a Screw 39 set (Figure 3).

The pin 4I, which is firmly screwed to the bracket 18, prevents overturning of the guide 29 during the displacement of the shaft 38. This is firmly connected to her Guides 29 on the bracket 18 perpendicular to the central plane of the

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Machine mounted displaceably. As already mentioned, the bracket 18 is screwed to the scissor support plate 16.

On the shaft 38 sits a spring 67, one end of which is fastened against a screw 68 on the shaft Ring 69 rests, while the other end of the spring is supported against an eye 28 cast on the bracket 18.

As a continuation of the drive for the scissors extension 11 * can be seen a screw 42, which is in a Tab 43 is mounted, which in turn is connected to the cross-piece 2 mentioned at the beginning by the screw connection 44 that sits on the piston rod 1. The screw 42 is secured against rotation by a lock nut 45 « A tension spring 46 acts on the tab 43, the other end of which is suspended from the pivot lever 14.

On the lug 43 on the left-hand side of the machine in the drawing, there is a pawl 47 on a bolt 48 pivotably mounted in a groove guide 43 'in a plane perpendicular to the center plane of the machine.

The pawl 47 is under the pressure of a spring 49, which the pawl 47 to rotate the bolt 48 clockwise

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tries. The spring 49, which presses with its one end on the pawl 47, is supported with its other end against the groove guides 43 * provided on the tab 43, which at the same time act as a limit stop the pivoting movement of the pawl 47 in the clockwise direction and is adjustable in terms of travel by means of the screw 50.

The pawl 47 is part of a switching mechanism, designated as a whole by 51, which serves the purpose described in detail below. The other parts of the switching mechanism are formed by a (switching) wheel 52 provided with switching teeth and a cam disk 53, both of which sit on a common shaft 54 and are fixed on this by a screw connection 55 and 56 against rotation on the shaft 54. The shaft 54 can be rotated step by step by means of a hand wheel 56 (FIG. 3). Ais lock to prevent the shaft 54 from rotating automatically is a ball 59 which is under the pressure of a spring 58 accommodated in the housing 57 and can engage in recesses 71 provided on the side of the cam disk 53 facing the housing 57. When the handwheel 56 is actuated, the spring pressure on the locking member 59 can be applied

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overcome and thereby the locking member from this straight receiving cavity 71 pushed out and thereby the ratchet 52 and thus also the cam 53 by one step, i.e. until the locking member 59 engages in the subsequent cavity in the direction of rotation 71 can be rotated further.

Normally, however, the switching mechanism 51 is not operated by hand but in the course of the work process in the machine automatically actuated via the pawl 47. By continuing to turn the ratchet wheel step-by-step 52 and the cam 53, a two-armed lever 60 is to be actuated, which is perpendicular to a bolt 61 is mounted pivotably to the center plane of the machine. The bolt 61 is in a cast eye of the housing 57 fastened by means of the screw 63. The housing 57 is attached to a main bearing 67 by the screws 68 held.

From the one - in Figures 1 and 2 at the bottom of the lever 60 is a pin 64 in front of a corresponding recess in the angled portion 29 * of the guide part 29 engages. At its other end, the lever points 60 a roller 66 mounted on a bolt 65,

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those on the peripheral surface of the cam plate 53 expires.

The setup described above works as follows:

At the beginning of a work cycle of the lasting machine, the drive means for the scissors 4 and the scissor extensions 11 * are in the position shown in FIG. If the piston rod 1 is now moved via the pressure medium cylinder (not shown) - downwards in the plane of the drawing - the crosspiece 2 and the two tabs 43 attached to it are also taken downwards. In the course of this movement, the scissors 4 pivot inwards that is to the - not shown - bars, which is achieved by connecting the cross piece 2 with the over slide carriers 25 by means of the link 3 and the guidance of the rollers 6, 7 provided on the slide carriers Curve slots 6 ^f , 7 * of the cam plate 8 is effected. When the scissors 4 are swiveled in, the scissors extension 11 ^T also move towards the ledge, since the leg 11 ″ of the angle part 11 with its edge facing the scissors 4 strikes against one of these opposite edges 4 ″ of the scissors 4, this edge being the result of the cutout 9 of the scissors 4 is formed.

In the course of pivoting the scissors 4 approaches Head 42 * of the screws 42 connected to the tabs 43 of the push rod 30 assigned to them. As soon as the screw

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benkopf 42 »abuts against the push rod 30, are the drive means for the independent pivoting movement of the scissor extensions with respect to the sliding scissors 4 11 »with the drive source for the sliding shears 4 positively connected, so that with further Displacement of the piston rod 1, the push rod 30 or its roller 32 against the contact surface 34 of the lever 14 presses, who with his fork part 14 », 14" over the role 20 a torque on the angle part 11 in the sense ^

exercises that this with his representing the scissor extension Leg 11 »is pivoted about the axis 10 counterclockwise. This compared to the pivoting movement the scissors 4 independent pivoting of the scissor extensions 11 »thus sets during a work cycle the machine initially with a time delay compared to the pivoting of the scissors 4. As soon as the screw head 42 'hits the push rod 30 the angular velocity of the scissors extension 11 »is greater than that of the scissors 4; so they rush this one equally ahead. It is thereby achieved that the scissor extensions 11 »not only to the central plane of the strips but also swivel in towards the tip of the last. This has the consequence that the leather of the lasting impact in the ball of the foot and - if the scissor extensions 11 »are made accordingly long - the joint is moved forward.

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will
pushed / as it is desired for the execution of a perfect lasting work. The end position of the scissors 4 and the scissor extensions II ¹ and also of the drive means provided for them are shown in FIG.

If the piston rod 1 is now withdrawn again, the scissors 4 pivot outwards again, that is to say back into their starting position. Due to the tension spring 46 acting on the lever 14, the angle part 11 is also rotated clockwise about the axis 10 until the leg 11 ″ comes to rest against the stop edge 4 ″ of the scissors 4. The scissor extension 11 ^f has thus also reached its starting position again.

As can be seen from Figure 2, the scissors extension lying to the left in the drawing is ll ^f in their end position further inward and toward pivoted to the tip than the lying on the other side scissors extension. The fact that the outline of the shoe is more drawn in on the inside in the ball and joint area than on the outside can be taken into account due to the different swiveling-in dimensions. There is therefore the requirement that the pinching tools for pinching the ball and joint part must pivot further on the inside than the pinching tools that work on the outside, and that

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the pivoting dimension can also be regulated depending on the joint width. In the machine according to the invention, this can first of all be achieved in that the ^{screws belonging to the drive of the scissor extensions II 1 are} screwed out of the brackets 43 to different extents. This has the consequence that the push rod 30 belonging to the drive of one scissor extension 11 »is moved earlier and thus the lever 14 and the angle piece 11 are also pivoted by a greater (angle) dimension than those on the other Λ

Side of the machine lying Zwickeinrichtung assigned Push rod 30 or the lever 14 and the scissor extension 11 *.

In order to make such a manual adjustment of the different pivoting dimensions of the two scissor extensions II ¹ superfluous and thus to enable a quick alternating pinching of left and right shoes on the machine, the switching mechanism already described in detail above is provided in the embodiment shown in the drawing whose pivoting dimension of the two scissor extensions 11 * is automatically changed alternately. This automatic switchover comes about as follows.

If the lasting tools are brought back into their starting position, then the one moves - in Figures 1 and 2 on the left side of the machine - tab 43 mounted pawl 47 towards the wheel 52 provided with the shift teeth 52 ».

In the process, the pawl finally strikes a switching tooth of this wheel and triggers a rotation of the switching wheel 52 clockwise, the spring 49 ensuring that the pawl remains in engagement with the switching tooth. In the course of the rotation of the ratchet wheel 52 caused by the pawl 47, the roller 66 of the lever 60 rolls on the Contact surfaces of the cam parts 53, the circumferential surface of which protrudes three in the illustrated embodiment rounded cam parts 53 * and straight (plane) extending between them and with respect to the shaft 54 has not so far protruding contact surfaces 53 ″. If the roller 66 comes into the area of a protruding Cam part 53 * then the lever 60 is rotated counterclockwise about the axis 61 and thereby the rod 38 in their camp 41 shifted to the right in the drawing. This has the consequence that the lever arm between the point of impact on the push rod 30 or its roller 32 on Lever 14 and its axis of rotation 15 compared to the corresponding lever arm of the on the other side of the Machine lying drive for the scissors extension 11 * is shorter, so that the next work cycle Lasting machine, the pivoting of the scissor extension 11 * on the right-hand side starts earlier than the scissor extension lying on the other side and

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according to also swings in to a greater extent than this. A reverse rotation of the switching mechanism and a pivoting back of the lever 68 is not possible because of the lock 59. Only when the pawl 47, which comes out of engagement with the ratchet wheel 52 during the movement of the lasting tools, moves back towards the switching mechanism and hits a next switching tooth 52 ¹ , the switching mechanism is rotated further, with the roller 66 then against a not as far as the cam section 53 * protruding contact surface 53 * of the cam disk 53 runs up. At this moment, the spring 67 sitting on the shaft 3B can move the shaft 38 to the left in the drawing. As a result, the lever arm, which is decisive for the pivoting dimension of the scissor extensions 11 *, is now between

the point of impact of the push rod 30 on the lever 14 and its Pivot axis 15 shortened on the left side of the machine. During the subsequent work cycle of the machine As a result, the scissor extension 11 * on the left side of the machine moves more inward and I

towards the tip than the other scissor extension. The end position of the lasting tools in this case is in Figure 2 of the drawing reproduced. If the machine then moves back to its starting position, it will find again a new switchover takes place, with dfe shaft 38 with the

Guides 29 and push rods 30 then back to the right be pushed.

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In this automatic switching rhythm can be intervened by operating the handwheel 56, what It turns out to be necessary, for example, if two left or two right shoes are in two consecutive work cycles of the machine are to be tweaked.

The invention is used preferably and with particular advantage in a point lasting machine. However, it is basically possible, the idea of the invention also in a heel lasting machine with intended for pinching the heel To use slip shears.

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Claims (18)

Patent »(protection) claims; l.y pinching machine with slip-over scissors for pinching the Shoe front part and other lasting tools for pinching the ball of the foot and possibly also the joint, whereby these Zwickwerkzeuge represent extensions of the sliding shears, characterized in that the extensions (11 *) than at least occasionally independently in comparison to the slip-over scissors (4) during pinching In the direction of the middle plane of the lasts and the toe of the shoe, lasting tools that can be swiveled in are formed and these drive means are assigned to perform the independent pivoting movement. 2. Lasting machine according to claim 1, characterized in that each scissor extension (II ¹ ) is pivotable about an axis (10) located in the vicinity of the scissor ends. 3. Lasting machine according to one or both of the preceding claims, characterized in that one of the scissor extensions (11 *) in the first phase of the pivoting movement of the sliding scissors (4) driving stop (4) on the scissors (4) or the slip-on supports (25) ⁿ ) is provided for the scissor extensions. -19- 909815/0452 4 ·. Lasting machine according to one or more of the preceding claims, characterized in that the drive means for the scissor extensions (11 *) in the final phase of the pivoting movement of the scissors (5) are positively connected to their drive source. 5. Lasting machine according to one or more of the preceding claims, characterized in that in the drive for the independent pivoting movement of the scissor extensions (II ¹ ) adjustment means (38,42) are provided for regulating the amount of pivoting of the scissor extensions (11 *). 6. Lasting machine according to claim 5, characterized in that that the scissors extension lying on the inside of the last than opposite that on the outside of the last lying scissors extension is designed to a larger extent pivotable lasting tool. 7. Lasting machine according to one or more of the preceding claims, characterized in that the drive for the independent pivoting movement of each scissor extension (11 *) one acting on it, on one stationary axis (15) mounted pivot lever (14) and a thrust member (30) acting on this, which is of the drive source can be acted upon -20-909815 / 0452 K85929 8. Lasting machine according to one or more of the preceding claims, characterized in that only in the final phase the pivoting movement of the shears (4) or the drive source only after this movement is coupled to the drive means for the scissor extensions, 9. Lasting machine according to one or more of the preceding claims, characterized in that for retrieval a spring drive (46) is provided for the scissor extensions (11 *) in their starting position (rest position). 10. Lasting machine according to claims 7 and 9, characterized in that the spring drive on the pivot lever (I4) attacks. 11. Lasting machine, on which both left and right shoes can be pinched, according to one or more of the preceding claims, in particular according to claims 5 and 6, characterized by a switching mechanism (51), the two scissor extensions (11 *) by adjusting their drive means alternately a different Swing-in dimension impresses. 12. Lasting machine according to claim 11, characterized in that the switching mechanism (51) is provided with a switching teeth (52 *) -21- H85929 Has ratchet wheel (52) and a cam disk (53), both of which sit on a common shaft (54), as well as a pawl (47) which interacts with the ratchet wheel and which is connected to the drive means for the scissor extensions (11 *) and the ratchet wheel after each work cycle of the machine rotates by one step and that with the cam disk (53) in the sequence of work cycles alternately against its most protruding (53 *) and less protruding (53 ^W ) parts working together lever (60), which the The point of application of the thrust member (30) acting on the pivot lever (14) alternately moves further or closer to the lever axis of rotation (15). 13. Lasting machine according to one or more of the preceding claims 5, 11 and 12, characterized in that the thrust members (30) or their holders (29) provided for each of the two scissor extensions (11 *) a shaft (38) mounted so as to be displaceable perpendicular to the center plane of the machine, which are positively connected to the lever (60) actuated by the cam disk (53) of the switching mechanism. 14. Lasting machine according to one or more of the preceding claims, characterized in that the scissor extensions (ll ⁿ ) designed as a bearing block for leaf springs (12) -22- 909815/0452 H85929 ^{which each have a (working) leg (12 n} ) which can be pressed against the strip base when the scissor extensions are pivoted in and which is arranged at a distance from the bearing block. 15 · Lasting machine according to claim 14, characterized in that the working leg (12 ^W ) of the springs (12) lying next to one another forms an acute angle with the bearing block. 16. Lasting machine according to claim 15, characterized ^ that the "angle from the spring closest to the end of the scissors to the one furthest away from the end of the scissors Spring increases. 17. Lasting machine according to claim 16, characterized in that the leaf springs in addition to the working leg (12 ⁿ ) also have a fastening leg (12 ^f ) bent from this, with which the springs are attached to the underside of the scissor extensions (11 *), and that the "radius of the bending point (12"") lying between the two legs increases from the spring closest to the scissor end to the spring furthest from the scissor end. -23- 909815/0452 H85929 18. Lasting machine according to one or more of the preceding claims 14 to 17, characterized in that the adjacent working legs (12 ⁿ ) of the leaf springs overlap one another. -24- 909815/0452