DE2214957A1 - Device for adjusting shoe uppers - Google Patents

Description

Dlpl.-Ing. Hein ?: Bardehle 2 2 H 9 5

D-8 Mönchen 20, PO Box 4
Telephon 0811/2? 25 55

Munich, March 27, 1972

Mexn characters:

Sign in USM Corporation

Flemington, New Jersey
Delivery address: Balch Street

Beverly, Mass. Ol 915 United States

Device for adjusting shoe uppers

The invention relates to a device for adjusting Scnihoberteilen for the progressive processing of Component parts of a shoe upper in order to use it over a To stretch the last on which it is carried, and around the To strip edge parts inwards over edge parts of an insole on the underside of the last, consisting of a EinricTi tuiig with at least one rotatable winding part in the form of a tensioning pulley that is placed on the hand parts of the Upper Is presses when it is captured by this facility, u.r. the upper part up over the last zlolipn and the edge parts of the upper part on the tensioner pulley a device with which the edge parts of the upper part leaving the tension pulley against

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speaking edge parts of the prandsoiile have been pressed, a liinrichtun ^ i'.u.u applying glue with a nozzle that has an outlet for applying glue in molten form to the edge parts of the upper part to the corresponding Uandteile of To attach the insole, a melting chamber to the To transfer glue into the molten porin, and a conveyor to gradually deliver sticky glue to the melting chamber according to that of the amount of melted adhesive to be applied to the nozzle to feed. The term "shoe" is used here to generally either the completed or to designate the outer footwear being manufactured "

In the German patent application: P 1b 85 - * S ° oO is a Device for applying adhesive described for use in a device for fitting of shoe uppers is suitable to make tough end parts of shoes using glue on a last aufzuspannen »A Schnielzkammer is provided that solid stick adhesive at one inlet end and from which the molten adhesive is discharged from a nozzle onto edge parts of an insole, which is arranged on the underside of a last. The nozzle is U-shaped to match the edge parts to match the insole at their tough end parts. The melting chamber has an elongated one A recess is provided in a metal block which is closed by a cover plate which is screwed onto the block is »Several heating elements are in the melting

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chamber provided to exert a progressive squeezing and clamping action on the rod as it is advanced along the chamber; The chamber is adjusted in such a way that its width (or depth) decreases progressively as one approaches the outlet, while the width (liKtf, width) increases progressively.

Know the side panel of a shoe in an upper fitting device dor e.g. in the German patent application P 16 35 ΑαΊ.5 described type on a ledge is to be pulled up, edge parts of the shoe upper between a rotating winding part in the form a tension pulley and a pressure element carried out, which in the device described in the above-mentioned application is an equally profiled block, However, this can also be a second, opposite rotatable roller, which is subjected to forces that the Tension the upper part over the strips on a side part of this when the tension pulley rotates. After that will be the hand parts of the stretched upper part from the edge parts of the lower school part folded inwards, placed over the corresponding hand parts of the insole and fixed pressed against this so that the edge parts of the upper part are attached to the edge parts of the insole by means of adhesive are applied to the insole immediately before placing the edge parts of the upper part will. In this device, a larger amount of adhesive is placed in a container, which is a storage container forms, which is then pressurized. The adhesive is in a solid, granular form.

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Some of the glue will melt around the bottom of the container and transported through heated channels to a nozzle The use of a granular binder erraö ^ ii-'i'.t os, adhesives with relatively high melting points to use. Such adhesives, which melt at 150 C, can be melted quickly when in grainy Form, but in a solid lock form they would not heat up quickly to this temperature, an adequate supply of molten glue at the nozzle. In practice, the top one Border on which glue in block form wirliso.ni is heated can be, 13Ο C. The use of a granular However, the binding agent has a special effect, not least in the fact that it is under the effect of prolonged heating decomposed. Decomposition can occur while the machine is out of operation for more than a few minutes or if a large amount of glue is melted at the same time for too long, even if the device is in Operation is because a large amount of glue is only available in one Ke he is consumed in relatively small quantities. Therefore it is desirable to have the adhesive in relatively small To melt quantities, e.g. by placing a small melting chamber in the storage container » If a device is started at the start of work, it can take a quarter to a half hour to complete the device for applying adhesive is fully operational. The container must also be used in the meantime be filled with granular binder, usually by means of a shovel. This is the risk of Large amounts of contamination by foreign bodies and smooth running of the adhesive-applying parts can, for example, be caused by

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a lost needle blocking the nozzle outlet or heated channel.

Attempts to create a. Arrangement of a device that does not require this heated channel were not successful when attempting to move the glue container closer to the nozzle. This is mainly due to it bring back that the heat required to melt the adhesive at the level of the operator's face occurs and after a certain period of time has a considerably disruptive effect. It is therefore desirable to have a Having a supply of adhesive in solid form that is continuous and well outside of the operator's work area is, as well as an assembly, melted as quickly and efficiently as possible by a small amount of glue will. The arrangement must not be unwieldy

be intended as it is for a device that is a small one

Has a job with a few small instruments.

In order to overcome at least some of these disadvantages, a thermoplastic adhesive has been proposed to use in rod form, which melts only a small amount of the rod at a time. Since it is the operation of a such apparatus requires the adhesive to be applied continuously throughout the life of the apparatus rather than dispensing glue that covers the desired area at once (leaving an interval to while the other instruments of the device are working, e.g. grippers, scrapers, etc.) a melting chamber suitable for such a device be able to continuously add molten adhesive gradually according to the operation of the device.

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spend, ^ ie using a melt canister like her in the above-mentioned German patent application P 16 489.0 would disadvantageously result in a exceptionally long melting range and the necessity

to lead

ability to use multiple heating elements to ensure that the melting rate is sufficient to allow adhesive to be applied in rapid succession during each work process of progressive work processes that performs the device in a shoe factory. Apart from that if there were several heating elements, tile an elongated one Channel, as described above, needs to be placed near the operator's face when a transport channel is not provided which would require the use of further Jeizelements and which in the heat and tension conditions that occur itself would be damaged "

The invention is therefore round the object _& to eliminate the aforementioned drawbacks.

This object is achieved according to the invention by that the melting chamber consists of a spiral there is tubular channel which is formed in thermally conductive material and in which a heating device is arranged essentially in the spiral windings to heat the channel, and that the Channel has an outlet end connected to the outlet of the nozzle and an inlet end through which the Adhesive is supplied in stick form.

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The following an exemplary embodiment is described Device for adjusting shoe uppers is of the Kind of like them? in the German patent application P 16 ο 5 ^ 84.5 is described. This device consists of a rotatable pull-up part and a pressure part in the form of a resilient fastened, evenly profiled blocks between which edge parts of a shoe upper are detected in the lateral areas. The top is made by the Rotary movement of the pull-up part stretched over a strip and the edge parts are folded inward and over the corresponding edge parts of an insole that is attached to the inguinal undersoite is held. Through a nozzle is melted adhesive or a binder on the Edge parts of the insole applied immediately before the edge parts of the shoe upper are placed. the Nozzle receives a quantity of glue in molten form from a melting chamber and is provided with a valve arrangement Mistake.

The melting chamber consists of a piece of copper pipe with a suitable diameter to a portion at an inlet end of the channel thereby formed of a stick-shaped adhesive of unlimited length to record. The tube is helically wound so that a heating cartridge is essentially within the coils of the pipe and equidistant from your channel in the pipe can be arranged in the entire area of the winding piece thereof. In one embodiment of the device the housing that contains the heating element forms a bracket to which the coils of the pipe are attached are welded to create a compact unit and maximum heat transfer from the heating element

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to get the glue in the pipe. In another embodiment, there is an aluminum block around the pipe turns molded to form a support, the resulting compact unit maximizing Creates heat transfer. Has in both embodiments the tube has an outlet leading to the valve assembly through which the adhesive passes to the nozzle outlet.

Adhesive in stick form is fed to the melting chamber by a conveyor. The amount of glue fed is determined by the size of the stroke movement of a piston and cylinder assembly that the rod advances into the melting chamber, causing a displacement of a corresponding amount of melted adhesive leads when the valve is open. The size of the lifting movement that takes place is in turn determined by the operation the inguinal apparatus of the device is determined. The valve of the device is a needle valve that is operated by a piston and cylinder assembly which opens the valve when the rod conveyor works to keep a lot of melted adhesive on the edge parts of the insole during the operation of the Inguinal appliances can be applied.

The invention is explained below on the basis of two exemplary embodiments shown in FIGS. 1 to 5. It shows:

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Fig. 1 is a side view of a head part of the device,

Pig. Figure 2 is a front view of the head part of the device in Pig. 1,

3 shows a section along the line III-III in FIG on an enlarged scale compared to FIG. 2,

Fig. 4 is a perspective view of the glue stick conveyor, and

5 in a representation corresponding to FIG. 1 Melting chamber in a further embodiment.

The illustrated device for adjusting a shoe upper has a device for progressively around shoe side parts to edit and is generally similar to the device described in German patent application P 16 85 484.5 educated. As FIGS. 1 and 2 show, the clamping or bar apparatus of the device a rotatable mounting part in the form of a tensioning roller, which as in the aforementioned application to the Presses edge parts, which can be driven in such a way that it can exert forces on edge parts of an upper part, that is pressed against the roller to pull the upper part up around the side areas of the last and the Edge parts (and thus the shoe) progressively past the roll · The device shown is provided with a press block 4 having a uniform contour to counter the edge parts of the upper part to push the roller as described in the aforementioned patent application, however, a

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second, opposite rotatable roller can be provided for this purpose, as described in German patent application P 19 56 468.2.

A nozzle outlet 6 corresponding to the nozzle 16 described in German patent application P 16 85 484.5, which forms an extension of a nozzle 8, is arranged in such a way that it applies molten adhesive to edge parts of an insole 10 which is carried by a last 12 so that of the strips in Fig. 2 is progressively moved to the left and the edge parts of the upper part (shown in this figure at 14 in phantom) leave the roller 2 and the block 4, between which these parts have been clamped. These parts are folded and stripped so that they come into contact with the insole and are pressed firmly against them by a rotary stripper in order to adhere them to the insole.

The melted plastic is from a melting chamber 61 of the device (FIG. 1) to the outlet 6 of the nozzle 8 through a valve arrangement 20 which has a Has valve body 22 with a bore 24 (Fig. 3) which penetrates this and with a bore 26 in the Nozzle 8 is connected. A valve needle 28 extends through the bores 24 and 26, one end of which is at one end Shoulder 30 can sit, which is formed on the lower part of the bore 26 to a device that form the flow of adhesive at the end of each operation the device terminated. The movement of the

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Needle 28 to stop the flow of glue and enable it at the beginning of an operation of the device by removing the end of the needle from the shoulder is controlled by a piston and cylinder assembly 32 having a piston rod 3k at its head 36 an arm of a bent lever is articulated. The other arm is fork-shaped in order to receive the outer end of the needle 28 and to be held between hangers 29 which are formed on the needle 28 in order to pull the needle out of the body 22 and to open the valve and the needle afterwards to slide inside and close it. The piston and cylinder arrangement is fastened to an arm 33 which is thermally insulated by an insulating layer 35, since otherwise heat would be transferred from the body 22.

The body 22 is provided with a heater 40 to prevent adhesive that has entered the block through a channel 42 is to keep melted. The channel 42 is in communication with the lower part of the bore 24, the has a larger diameter than an upper part. the Arrangement is such that the adhesive in the lower part of the bore 24 around the needle 28 to the nozzle 8 after can flow below. The upper part of the hole, which is closer to the needle, does not allow itself to be a greater part of the adhesive from the junction of the channel 42 and the lower part of the bore 24 from moves upwards, but the part that moves upwards is controlled by a seal 44 which consists of a bushing consists of glass-filled polytetrafluoroethylene, through

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which the needle 28 is tightly but slidably guided, prevented from seeping out of the bore over the surface of the body 22. The seal 44 is held in a recess in the surface of the body 22 by a metal threaded bushing 45. Another glass-filled polytetrafluoroethylene bushing 46 forms a seal between the body 22 and the nozzle 8 to prevent seepage into this area. The socket 46 is received partly in a recess 47 in a lower part of the body 22 and partly in a recess 48 in an upper part of the nozzle 8. A metal bushing 50 is also received in the recess 48 and is fastened in an inner threaded part of the recess 48 and under the bushing 46. The socket 50 receives the needle 28 in a tight, sliding fit and serves to precisely center the needle in the bore. However, so that the adhesive can flow downwards along the bore 24, four bores 52 (FIG. 3 shows two of the bores 52) through which the molten adhesive flows are provided in the socket 50. In the recess 48 under the bush 50 there is a free space 54 which is in communication with the bore 26. The seat of the end part of the needle against the shoulder 30, as explained above, prevents adhesive from flowing through the outlet 6 of the nozzle 8 unless the needle is raised by actuation of the piston and cylinder arrangement 3 ² .

The piston and cylinder assembly 32 for opening the Needle valve is actuated when the inguinal appliances of the device begin to work when a shoe is fed to the device. This will only be during

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Adhesive is supplied over time, while the apparatus is working and the supply stops when an operation is completed. The glue is forced through the needle valve by the pressure of the solid glue, which is fed into the melting caramer 61 by a mechanism described below.

As previously mentioned, the molten adhesive enters the body 22 through the channel 42. A block 60 is attached to the body 22 in the area surrounding the channel (a seal 62 is provided to prevent leakage). The block 60 has a hollow cylindrical extension 6k which forms a housing for receiving a 500 W heating element 65. The melting chamber of the apparatus shown consists of a piece of copper tubing 66 which is spirally wound around extension 64 and which has a diameter which

is
somewhat larger than that of one in the form of a stick

the '

Storage adhesive R, is conveyed to an inlet opening 63 thereof through a flexible tube 69. An outlet end of the tube 66 extends into the block 60 to allow adhesive which has passed through the tube which is spirally wrapped around the heating element and is completely melted in this section to the body 22 of the valve 20. The turns of the tube 66 and the extension 64, which receives the heating element 65 , are welded to one another in order to form a uniform melting chamber and to ensure maximum heat transfer to the adhesive rod located therein. Between the melting chamber and the pipe 66 there is a pipe connection

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dung 67 made of sintered polytetrafluoroethylene is provided, to prevent heat from spreading from the chamber to the adhesive still in the pipe and melts it prematurely.

The mechanism by which the stick of glue is fed to the melting chamber 61, which consists of the tube 66 and the extension 64, is shown in FIG. The rod feed device comprises a cylindrical guide tube 145, in the longitudinal direction of which two parallel slots run at diametrically opposite points. A conveying part 149 which is displaceable along the guide ^{tube is provided with two feed pawls 15 1} , the engagement end parts of which are pressed inwardly towards one another (as will be explained later) and which extend into the slots 147 in order on opposite sides of the adhesive rod R (which has a circular cross-section ), which is inserted into the guide tube 145 from a roller, not shown. The conveying member 149 is formed so that ^e toggle during each working cycle of the apparatus is reciprocated to cut a piece of the adhesive rod to advance through the guide tube 145 to the melt chamber inlet end 63 during the adhesive application process and to withdraw (the feed pawls slide during the return stroke on the Glue stick). These movements of the conveying part 149 are caused by a piston and cylinder arrangement 143 actuated by a pressure fluid. the

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Piston and cylinder assembly 153 includes a piston (not shown) with a piston rod 155, at one end of which a flange part 157 is attached. The stroke movement of the piston rod 155 is greater than the length to be applied to the insole edge parts necessary adhesive when making men's shoes the largest size can be stretched. As a result, only a relatively small proportion of the smaller ones are used the possible stroke movement of the piston rod 155 is actually used before the conveying part is in its starting position returned at the end of the inguinal appliance operation. The cylinder of the piston and cylinder assembly 153 is attached to a plate 159, which also carries the guide tube 145, so that the guide tube runs parallel to the axis of the piston rod 155. The plate 159 is on a suitable one Fixed place of the frame of the device.

The feed pawls 151 are freely pivotable approximately in the middle on pins 161 which extend from the conveying part 1 ^ 9, with end portions of the pawls 151 having slots 163 (which extend in the longitudinal direction of the pawls) to receive shaft parts of screws I65 which extend through slots (which run parallel to the axis of the guide tube 1 ^ 5) in the conveying part 1 ^ 9 and are screwed into a flange I69 of the flange part 157. As shown in Fig. K , the upward movement of the flange portion 157 'because the screws 165 engage the slots 163 (and aided by leaf springs 160 acting on the pawls) pivots the pawls 151 in one direction

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such 157 ^d i ^e pawls in the opposite direction about the pin 161 pivots the pawls in the adhesive rod R engaged in the guide tube and advance it up, while in the AbAiärtsbewe ^ ung the Planschteil so that they slide freely along the rod R allowing the necessary movement of the conveyor part 1 ^ 9 (which carries the pawls) relative to the flange part 1571 for this action of the pawls to take place through the slots I67 through which the screws 165 extend freely. To prevent the glue rod from being fed back during the return movement of the pawls 151, control pawls I85 are provided which are mounted on pivot pins which are carried by a bracket 175 and are pressed resiliently against the rod by springs I87. The control pawls 185 are arranged so that when the rod R attempts to move rearward, the pawls 185 engage the rod and hold it in place while sliding against the rod as it is advanced.

When the piston rod 155 ends its return stroke, stops 186 on the conveying part 1 ^ 9 grip the holder 175 and hold the conveying part against the flange part 157 so that the pawls 151 open and the Operator can insert a new glue stick if necessary. The control pawls I85 are with Lugs I89 provided that the operator can press to open these latches when a new stick of glue is to be used.

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The modified form of the apparatus illustrated differs from that described above in that it relates to the construction of its melting chamber 86 which, as shown in FIG. 5, similarly comprises a length of copper tube 90 which is helically wound and a channel having an inner diameter which is slightly larger than that of a supply adhesive rod R, which, as in the device already described, is fed to its inlet end 92 by a flexible tube 69 '. A connector 94 made of an aluminum alloy is provided between the flexible tube 69 ¹ and the inlet end 92 of the tube 90 to prevent the propagation of heat from the hammer 86 to the one still in the flexible tube 69! to prevent the adhesive present and its premature melting · The connecting part 94 is provided with radially extending ribs 96, which support the dissipation of heat and thus prevent the heat from spreading. The ribs 96 near the inlet end 92 of the tube have a slightly larger surface area than those near the flexible tube 69 ¹ .

During the manufacture of the melting chamber, the copper tube 90 is wound around a mandrel of a suitable size, so that it is given the shape shown in FIG. The coiled tube is then inserted into a mold and encapsulated in aluminum to form a block 98 form. During the casting process, a plug is inserted axially into the pipe windings in the casting mold in order to achieve a To form bore 100 in block 98 in which a 500W

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Heating element 102 is added. The block 98 is attached to a block 88 which connects the melting chamber to a valve body 22 'by inserting a headed pin 10 into the block. 88 is used, so that a wedge is created around which the aluminum can flow in the mold. The block 38 is provided with two bores, a central bore IO6 for receiving an end portion of the heating element 102 and an offset bore 108 for the outlet end of the tube 90 and a seal 62 'similar to the seal 62 in the device already described, around the Prevent leakage of adhesive as it flows from the melting chamber 86 to the valve body 22 '.

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Claims (6)

22U957 Anspi ° üclie Device for adjusting shoe uppers for progressive Processing of hand parts of a shoe upper in order to stretch it over a last, on which it is worn, and around the edge parts inwards over edge parts of an insole at the bottom strip of the last, consisting of a device with at least one rotatable pull-up part in the form a tension roller that presses on the edge parts of the upper part when it is gripped by this device pulling the upper part up over the bar and guiding the edge parts of the upper part past the tensioning pulley, a device with which the edge parts of the upper part leaving the tension roller against corresponding Edge parts of the insole are pressed, a device for applying adhesive with a nozzle, having an outlet for applying glue in molten form to the edge portions of the top to attach to the corresponding edge parts of the insole, a melting chamber to put the adhesive in the molten form is transferred, and a conveyor to gradually transfer glue in stick form to be supplied to the melting chamber according to the amount of molten adhesive to be applied from the nozzle, characterized in that the melting chamber consists of a spiral-shaped tubular channel, which is formed in thermally conductive material 209843/0678 22U957 and wherein a heater (65) is disposed substantially in the helical turns to to heat the channel, and that the channel has an outlet end that connects to the outlet of the nozzle (8) and an inlet end through which the adhesive is fed in a rod form. 2. Device according to claim 1, characterized in that the channel from the inner wall of a holu (66) thermally conductive material is limited, and that the tube (66) in spiral turns over the greater part its length is located between the outlet and inlet ends of the channel. 3. Device according to claim 2, characterized in that the heating device (65) is a heating cartridge, which extends equidistantly through the channel through the piece formed in the turns. k. Device according to one of the preceding claims, characterized in that the tube (66) is in contact with a thermally conductive holder in order to form a compact unit for increasing the heat transfer. 5. Device according to one of the preceding claims, characterized in that a valve arrangement is arranged between the melting chamber (61) and the nozzle (8). 6. Apparatus according to claim 5 »characterized in that that the valve arrangement (20) is a needle valve. 209843/0678