A last for use in the bonding of a shoe upper to a sole

Abstract

The utility model discloses a kind of for the combination of insole and upper, it is related to shoemaking equipment technical field, the foot includes the outside edge and inside edge on the insole, outside edge and inside edge are fixed by thread sewing, and form the thread sewing area containing needle point, the raising device includes grinding wheel assembly, grinding wheel assembly includes first grinding wheel, second grinding wheel and intermediate area, intermediate area is set between first grinding wheel and second grinding wheel and concave, and the width of intermediate area is slightly greater than the width of thread sewing area, the wheel face of first grinding wheel cooperates with outside edge, the wheel face of second grinding wheel cooperates with inside edge, and the intermediate area cooperates with thread sewing area.The utility model first grinding wheel and second grinding wheel reserve intermediate area, the width of intermediate area corresponds with the thread sewing area of sutured foot, such setting mode not only can avoid polishing to thread sewing area, reduce rework, can also improve the working efficiency of raising.

Description

Technical Field

[0001] This utility model relates to the field of shoemaking equipment technology, specifically to a shoe upper fraying device for combining the sole and the upper. Background Technology

[0002] Adhesive bonding is a common shoe-making process where glue is applied to the upper and sole to bond them together. During the bonding process, the upper is typically roughened first. This roughening involves using abrasive materials like sandpaper or a grinding wheel to rub the upper, creating a rougher surface for bonding and increasing the contact area, thus reducing issues like delamination, insufficient glue, and separation. In actual production, such as with leather shoes, the upper material used is significantly more expensive than other materials. The upper needs to consider breathability and aesthetics, while the upper and sole composite prioritize strength. Therefore, if the strength of the upper material meets or exceeds the upper material requirements, replacing the upper and sole composite with a cheaper material not only doesn't affect the shoe's quality over its lifespan but also reduces costs. The problem lies in the roughening process. Since the upper material and replacement parts are usually secured with stitching, the roughening process can easily break the threads if not handled carefully. Utility Model Content

[0003] To address the above shortcomings, the purpose of this utility model is to provide a napping device for the combination of shoe sole and upper, used for napping the sewn upper and sole.

[0004] Therefore, this utility model provides a napping device for the upper of a shoe sole and upper. The upper includes an outer side and an inner side covering the midsole. The outer side and the inner side are fixed by a stitch to form a stitched area. The napping device includes a grinding wheel assembly, which includes a first grinding wheel, a second grinding wheel, and a middle area. The middle area is located between the first grinding wheel and the second grinding wheel and is concave. The width of the middle area is slightly larger than the width of the stitched area. The surface of the first grinding wheel mates with the outer side, the surface of the second grinding wheel mates with the inner side, and the middle area mates with the stitched area.

[0005] Furthermore, it also includes a prefabricated limiting component, the shape of which matches the seam area. The limiting component has a T-shaped cross-section and includes a convex strip and a wing plate. The wing plate is fixed to the seam area by nails and covers the seam area. The width of the wing plate is equal to or slightly larger than the width of the seam area. The limiting component can cooperate with the concave middle area to limit the napping device, so that the first grinding wheel and the second grinding wheel act on the surfaces of the corresponding outer and inner sides.

[0006] Furthermore, the fuzzing device includes a handle and a head, the head being provided with a grinding wheel assembly, the middle region of the grinding wheel assembly being provided with a concave fitting part that cooperates with a limiting component, and the head being provided with a motor that drives the grinding wheel assembly to rotate.

[0007] The grinding wheel assembly is fixed on the frame, and the frame is also fixed with a limiting baffle. The position of the limiting baffle is such that when the side of the shoe mates with the limiting baffle, the seam area is directly opposite the middle area of ​​the grinding wheel assembly.

[0008] Furthermore, the grinding wheel assembly is provided in two sets, symmetrically arranged on the frame, one set of grinding wheel assembly cooperates with the limiting baffle, and the other set of grinding wheel assembly cooperates with the limiting rod.

[0009] Furthermore, a motor housing is provided between the two sets of grinding wheel assemblies, and the motor is located in the motor housing. The bottom of the motor housing is at the same height as or slightly higher than the lower end of the grinding wheel surface.

[0010] Furthermore, a horizontal baffle plate is provided between the motor housing and the grinding wheel assembly, with the lower surface of the baffle plate slightly higher than the lower end wheel surface of the grinding wheel assembly.

[0011] Furthermore, the barrier plate extends to the side of the frame, and the barrier plate is provided with a cylindrical groove with a cross-section, in which the grinding wheel assembly is disposed.

[0012] Furthermore, the limiting plate or limiting rod is fixed to the frame by a crossbar, and the bottom of the limiting rod and the side near the frame are reserved with space so that when the brushing is performed, the hand can move at the bottom of the limiting rod and the side near the frame.

[0013] Furthermore, it also includes a suction port, which is located on the back plate of the frame and is used to suck up the dust generated by the fuzzing process.

[0014] The beneficial technical effects of this utility model are as follows:

[0015] (1) This utility model discloses a napping device for the upper of a shoe sole, which is equipped with two grinding wheels, namely a first grinding wheel and a second grinding wheel. The first grinding wheel and the second grinding wheel have a reserved middle area, which corresponds to the width of the seam area of ​​the upper and is generally slightly wider than the seam area. The first grinding wheel and the second grinding wheel are used for napping the corresponding inner and outer edges, respectively. This setting not only avoids sanding the seam area and reducing rework, but also improves the efficiency of napping.

[0016] (2) In a specific embodiment of this utility model, there are two types: a handheld shaving device and a grinder. The handheld shaving device is used in conjunction with a limiting component. The limiting component is T-shaped, pre-formed, and nailed above the seam area to prevent the grinding wheel from grinding the seam area. The raised strip allows the shaving device to move along the raised strip, which can accurately grind and shave the sides of the limiting component, significantly improving work efficiency and avoiding grinding other areas that do not need to be ground. Attached Figure Description

[0017] Figure 1 This is a bottom view of the assembly of the upper and the last.

[0018] Figure 2 This is a schematic diagram of the limit component;

[0019] Figure 3 This is a schematic diagram of the handheld napping device in Example 1;

[0020] Figure 4 This is a schematic diagram of the napping device in Example 2;

[0021] Figure 5 This is a bottom view of the grinding wheel assembly in Example 2.

[0022] Explanation of reference numerals in the attached drawings: 1. Midsole; 2. Upper foot; 201. Outer side; 202. Inner side; 203. Seam area; 3. Raising device; 301. Handle; 302. Head; 303. First grinding wheel; 304. Second grinding wheel; 305. Middle area; 306. Limiting baffle; 307. Limiting rod; 308. Motor housing; 4. Upper and last combination structure; 5. Limiting component; 501. Nail; 6. Suction slot; 7. Barrier plate. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Reference Figures 1 to 5As shown, this utility model discloses a fraying device for the upper of a shoe sole and upper. The upper 2 includes an outer edge 201 and an inner edge 202 covering the midsole 1. The outer edge 201 and the inner edge 202 are fixed by stitching, forming a stitched area 203 containing the stitches. The fraying device 3 includes a grinding wheel assembly, which includes a first grinding wheel 303, a second grinding wheel 304, and a middle area 305. The middle area 305 is located between the first grinding wheel 303 and the second grinding wheel 304 and is concave. The width of the middle area 305 is slightly larger than the width of the stitched area 203. The surface of the first grinding wheel 303 mates with the outer edge 201, the surface of the second grinding wheel 304 mates with the inner edge 202, and the middle area 305 mates with the stitched area 203. (Refer to...) Figure 2 and Figure 3 As shown, a specific embodiment 1 of this utility model is a handheld brushing device 3, including a handle 301 and a head 302. A wire passes through the handle 301 and connects to the head 302. A motor is installed inside the head 302, and a grinding wheel assembly is fixed on the motor shaft. Generally, a low speed is used for grinding. First, small nails are driven into the shoe last and midsole 1 with a nail gun to fix them. Then, after processes such as clamping the forefoot and midsole, the sewn-in upper 2 is pulled tight to the edge of the midsole 1 and fixed with both adhesive and nails (the nails are used to fix it before the adhesive is firmly attached, and then removed). During the lasting process (i.e., clamping the forefoot and midsole), although the basic upper components are produced in a standardized manner, there may be individual differences on some shoes after processing. That is, there may be a certain deviation in the seam area 203. However, in order to ensure the quality of production and the firmness of the upper and sole composite, this deviation needs to be controlled within a certain range. The width of the aforementioned limiting component 5 (wing plate) can be set to be slightly larger than the width of the seam area 203, so that even if there is a certain deviation in the seam area 203, it can be covered. The limiting component 5 can be pre-designed and formed by mold processing. It is generally made of hard plastic material and is fixed to the seam area 203 with small nails 501 before sanding. It is removed after sanding and before applying glue. The middle region 305 of the grinding wheel assembly is provided with a concave fitting that mates with the limiting component 5. The protrusion is inserted into the concave fitting. During roughening, the grinding wheel assembly moves along the track formed by the protrusion to roughen the outer edge 201 and the inner edge 202. In this embodiment 1, a stop can also be provided on the side of the head 302 near the handle 301 to form a limit. The assembly of the side panel and the last is polished by cooperating with the stop. However, this technical solution has certain shortcomings. When the handheld device is polished, there is a large vibration. Using the stop to limit the movement can easily cause displacement under vibration, resulting in damage to the seam area 203.

[0025] Handheld brushing devices generate a lot of dust, making them unsuitable for environmental and safety requirements. They are generally used as supplementary brushing tools. For example, after the foot 2 has been processed by a sander, if there are still areas where brushing is insufficient, a handheld brushing device 3 is used for supplementary sanding, offering greater flexibility. (Refer to...) Figure 4 and Figure 5 As shown, Embodiment 2 of this utility model is a grinding machine. The structure of the grinding wheel assembly is basically the same as that of Embodiment 1, except that in Embodiment 2, the grinding wheel assembly is fixed to the frame. The limiting component 5 and the mating part located in the middle area 305 of the grinding wheel assembly in Embodiment 1 can also be used in Embodiment 2. Using the limiting component 5 will increase the steps of fixing and removing the limiting component 5, reducing production efficiency. An improved solution includes fixing a limiting baffle 306 on one side of the frame. The position of the limiting baffle 306 is such that when the side of the upper and last combination structure mates with the limiting baffle 306, the seam area 203 is directly opposite the middle area 305 of the grinding wheel assembly. According to the requirements of the composite sole, the width of the upper covering the edge of the midsole 1 is designed to meet the requirements, and the upper and each component are manufactured in a standardized manner. Therefore, the distance between the seam area 203 and the four sides of the shoe and last is basically the same. By attaching the side of the combined structure of the upper and last to the limiting baffle 306, the first grinding wheel 303 can be controlled to act on the outer side 201, and the second grinding wheel 304 can act on the inner side 202. The seam area 203 corresponds to the position of the middle area 305 without grinding wheel, which realizes the sanding and burring of the inner side 202 and the outer side 201, while avoiding the seam area 203 from being sanded and damaged. Considering a certain deviation in the processing, the width of the middle area 305 is generally slightly larger than the width of the seam area 203.

[0026] In the above embodiments, reference is made to Figure 5As shown, the grinding machine has two sets of grinding wheel assemblies, symmetrically arranged on the frame. One set of grinding wheel assemblies cooperates with the limiting baffle 306, and the other set cooperates with the limiting rod 307. The side of the combination of the upper and the last is not a straight line, but is composed of multiple arcs. The heel and forefoot positions are both outwardly convex arcs, while the inner side of the arch position is a concave arc. The outer side of the arch position is designed with both outwardly convex arcs and, in some cases, inward concavity. For the limiting baffle 306, the outwardly convex arcs can cooperate well with it to grind the upper 2, but for the concave arcs, the middle area 305 of the grinding wheel assembly will deviate from the seam area 203. In this embodiment, one side of the limiting baffle 306 is used to process the upper 2 corresponding to the convex arc portion, while the limiting rod 307 abuts against the concave arc portion to limit it. In this embodiment 2, the motor housing 308 is located between the two sets of grinding wheel assemblies, the motor is located in the motor housing 308, and the control panel is located on the upper side of the frame. The control panel is equipped with a start button, a speed button, etc. The bottom height of the motor housing 308 is equal to or slightly higher than the lower end of the grinding wheel surface. Its function is to reduce the size of the grinder. During grinding, only one set of the two grinding wheel assemblies works at a time. A part of the sidewall and last assembly structure 4 can extend beyond the motor housing 308 to the bottom of the other set of grinding wheel assemblies, thereby reducing the space requirements of a single grinding wheel assembly.

[0027] In the above embodiment 2, referring to Figure 4 and Figure 5 As shown, a horizontal baffle plate 7 is provided between the motor housing 308 and the grinding wheel assembly. The lower surface of the baffle plate 7 is slightly higher than the lower end of the grinding wheel assembly. The baffle plate is mainly used to cooperate with the insole 1. During grinding, the upper and last assembly structure 4 rests against the limiting baffle plate 306 or the limiting rod 307, while the surface of the insole 1 rests against the baffle plate 7, ensuring that the upper and last assembly structure 4 is ground horizontally or nearly horizontally, reducing operational errors. For details, refer to... Figure 5 As shown, the barrier plate 7 can extend to the side of the frame, and the barrier plate is provided with a cylindrical groove with a facet, in which the grinding wheel assembly is located.

[0028] In the above embodiments, reference is made to Figure 4 As shown, the limiting plate or limiting rod 307 is fixed to the frame by a crossbar. The bottom of the limiting rod 307 and the side near the frame are reserved with space so that when the brushing is performed, the hand can move at the bottom of the limiting rod 307 and the side near the frame.

[0029] In the above embodiments, reference is made to Figure 4 As shown, a suction slot 6 is provided on the back plate corresponding to the grinding wheel assembly. The suction slot 6 is connected to the bag filter. The dust collection bag of the bag filter can be set in the rear of the cabinet in the lower part of the frame. The suction slot 6 is used to suck up the dust generated by the brushing and reduce dust pollution.

Claims

1. A device for raising the upper of a shoe sole and upper combination, said upper comprising a lateral side and a medial side which are overlaid on a midsole, the lateral side and the medial side being fixed by a thread seam and forming a thread seam area containing a stitch, characterized in that: The burring device includes a grinding wheel assembly, which includes a first grinding wheel, a second grinding wheel, and a middle region. The middle region is located between the first grinding wheel and the second grinding wheel and is recessed. The width of the middle region is slightly larger than the width of the seam region. The wheel surface of the first grinding wheel mates with the outer edge, the wheel surface of the second grinding wheel mates with the inner edge, and the middle region mates with the seam region.

2. A device for raising the upper of a shoe according to claim 1, wherein: It also includes a prefabricated limiting component whose shape matches the seam area. The limiting component has a T-shaped cross-section and includes a convex strip and a wing plate. The wing plate is fixed to the seam area by nails and covers the seam area. The width of the wing plate is equal to or slightly larger than the width of the seam area. The limiting component can cooperate with the concave middle area to limit the napping device, so that the first grinding wheel and the second grinding wheel act on the surfaces of the corresponding outer and inner sides.

3. A device for raising the upper of a shoe according to claim 2, wherein: The fuzzing device includes a handle and a head. The head is equipped with a grinding wheel assembly. The middle area of ​​the grinding wheel assembly is provided with a concave fitting that cooperates with a limiting component. The head is equipped with a motor that drives the grinding wheel assembly to rotate.

4. A device for raising the upper of a shoe according to claim 1, wherein: The grinding wheel assembly is fixed on the frame, and the frame is also fixed with a limiting baffle. The position of the limiting baffle is such that when the side of the shoe mates with the limiting baffle, the seam area is directly opposite the middle area of ​​the grinding wheel assembly.

5. A device for raising the upper of a shoe according to claim 4, wherein: The grinding wheel assembly is provided in two sets, symmetrically arranged on the frame. One set of grinding wheel assemblies cooperates with the limiting baffle, and the other set of grinding wheel assemblies cooperates with the limiting rod.

6. A device for raising the upper of a shoe according to claim 5, wherein: A motor housing is provided between the two sets of grinding wheel assemblies. The motor is located in the motor housing, and the bottom of the motor housing is at the same height as or slightly higher than the bottom surface of the grinding wheel.

7. A device for raising the upper of a shoe according to claim 6, wherein: A horizontal baffle plate is provided between the motor housing and the grinding wheel assembly, with the lower surface of the baffle plate slightly higher than the lower end wheel surface of the grinding wheel assembly.

8. A device for raising the upper of a shoe according to claim 7, characterized in that: The barrier plate extends to the side of the frame and has a cylindrical groove with a facet, in which the grinding wheel assembly is disposed.

9. A device for raising the upper of a shoe according to any one of claims 5 to 8, characterised in that: The limiting plate or limiting rod is fixed to the frame by a crossbar. The bottom of the limiting rod and the side near the frame are reserved with space so that the hand can move at the bottom of the limiting rod and the side near the frame when the brushing is performed.

10. A device for raising the upper of a shoe according to claim 6, characterized in that: It also includes a suction port, which is located on the back plate of the frame and is used to suck up the dust generated by the fuzzing process.

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