Shoe back strap positioning tool

Abstract

The utility model discloses a kind of shoe rear strap positioning tool, including tool main body, the tool main body includes fixed base installed in the inboard of shoe upper heel portion and the clamping arm connected with fixed base, one end of the clamping arm is connecting end, and is connected with fixed base, the other end is clamping end, the clamping end extends from shoe upper side to the other side and forms positioning guide structure, the rear strap is worn in clamping end, the position and angle of rear strap are constrained using clamping end.The utility model installs positioning tool in the inboard of shoe upper heel portion by fixed base, rear strap is inserted from clamping end, the shape and position of clamping end limit the left and right deviation, front and rear inclination and turning angle of rear strap, realize the three-dimensional constraint of rear strap, position rear strap, make rear strap always maintain straight upturned state in production process, prevent rear strap from being skewed, varus and other deformation conditions, substantially improve the consistency and aesthetic degree of appearance of footwear product.

Description

Technical Field

[0001] This utility model relates to the field of footwear accessories technology, specifically a positioning fixture for the heel pull tab of a shoe. Background Technology

[0002] The upper is made of multiple pieces of material (such as the front piece, back piece, and side piece). The heel pull tab is usually sewn onto the heel piece and then stitched with other parts. After the heel pull tab is installed, the sole needs to be glued (such as by cold bonding or injection molding). If the heel pull tab is not properly maintained in subsequent processes, it may become crooked or outward-turned, affecting the appearance and overall wearability of the finished shoe.

[0003] In existing production technologies, Chinese utility model patent with patent number 202220989723.9 discloses a shoe with a three-dimensional shaping function. This patent only involves setting a shaping piece on the stand-up collar of the shoe body to shape the stand-up collar, but does not address the positioning of the back pull strap. The problem of deformation of the back pull strap is not well solved, and the back pull strap of the finished shoe is often in a deformed state.

[0004] To effectively solve these problems and improve the overall appearance quality of shoes, it is urgent to effectively control the heel pull tab during the product manufacturing process so that the deformation of the heel pull tab in the finished shoes can be resolved. Utility Model Content

[0005] The purpose of this utility model is to provide a shoe heel pull tab positioning fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shoe heel pull tab positioning fixture, comprising a fixture body, the fixture body including a fixed base installed on the inner side of the heel of the shoe upper and a clamping arm connected to the fixed base, one end of the clamping arm being a connecting end connected to the fixed base, and the other end being a clamping end, the clamping end extending from one side of the shoe upper to the other side to form a positioning guide structure, the heel pull tab being threaded through the clamping end, and the position and angle of the heel pull tab being constrained by the clamping end.

[0007] Furthermore, the clamping arm is shaped like a "7", and a positioning gap is formed between the clamping end and the fixed base.

[0008] Furthermore, the clamping end is an arc-shaped surface, smoothly transitioning from the end of the connecting end to the end of the clamping end.

[0009] Furthermore, the outer side of the fixing base is provided with a positioning surface that fits against the inner side of the heel of the shoe upper, and the positioning surface is a convex surface that matches the curved surface of the heel of the shoe upper.

[0010] Furthermore, the inner side of the fixing base is provided with a contact surface that fits against the outer side of the heel of the shoe last. The contact surface is a concave surface that matches the curved surface of the heel of the shoe last. The positioning surface and the contact surface form a two-way curved fitting structure, so that when the fixing base is embedded in the gap between the shoe last and the upper, the convex surface and the inner side of the upper, and the concave surface and the outer side of the shoe last simultaneously achieve surface contact, forming a gapless clamping and positioning.

[0011] Furthermore, the bottom of the fixed base extends downward to form two legs, which are spread out from top to bottom in a figure-eight shape.

[0012] Furthermore, the support leg has a tapering structure that is wider at the top and narrower at the bottom.

[0013] Furthermore, the ends of the support legs are provided with scratch-resistant rounded corners.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a fixed base to install the positioning fixture on the inner side of the heel of the shoe upper. The rear pull strap is inserted from the clamping end. The shape and position of the clamping end limit the left and right offset, front and back tilt and flip angle of the rear pull strap, thereby achieving three-dimensional constraint on the rear pull strap, positioning the rear pull strap, and keeping the rear pull strap in an upright and tilted state throughout the production process. This prevents the rear pull strap from becoming skewed, flipped outward or deformed, and greatly improves the consistency and aesthetics of the appearance of footwear products. 2. The fixed base is embedded in the gap between the shoe last and the upper through a bidirectional curved fitting structure formed by the positioning surface and the contact surface, forming a gapless clamping and positioning, which improves the tooling's anti-displacement ability. In subsequent sewing, gluing and other processes, the tooling always remains stable, providing a reliable guarantee for production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the shoe rear pull strap positioning fixture structure of this utility model; Figure 2 This is a schematic diagram of another view of the shoe rear pull strap positioning fixture of this utility model; Figure 3 This is a schematic diagram showing the shape of the shoe rear pull strap positioning fixture of this utility model inserted into the shoe; In the diagram, 100-shoe upper, 101-back pull strap, 200-shoe last, 1-fixed base, 11-positioning surface, 12-contact surface, 13-support leg, 2-clamping arm, 21-connecting end, 22-clamping end. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-2 As shown, this embodiment provides a shoe heel pull tab positioning fixture, including a fixture body. The fixture body is made entirely of plastic material, such as PP / EPDM blend material, and is injection molded, giving it a certain elasticity. The main body of the tooling includes a fixed base 1 installed on the inner side of the heel of the shoe upper 100 and a clamping arm 2 connected to the fixed base 1. One end of the clamping arm 2 is a connecting end 21 connected to the fixed base 1, and the other end is a clamping end 22. The clamping end 22 extends from one side of the shoe upper 100 to the other side to form a positioning and guiding structure. The rear lifting strap 101 is inserted through the clamping end 22, and the position and angle of the rear lifting strap 101 are constrained by the clamping end 22. In this embodiment, the clamping arm 2 is shaped like a "7". The clamping end 22 forms a positioning gap with the fixed base 1. The positioning gap is 0.5~2cm, which can be adapted to different models of rear pull straps 101 and hook the rear pull straps 101. The clamping end 22 can be set as an arc surface, smoothly transitioning from the end of the connecting end 21 to the end of the clamping end 22, so that the clamping end 22 can hook the rear pull straps 101. In this way, the shape and position of the clamping end 22 limit the left and right offset, front and back tilt and flip angle of the rear pull straps 101, realize the three-dimensional constraint of the rear pull straps 101, position the rear pull straps 101, and keep the rear pull straps 101 upright and tilted back during the production process, preventing the rear pull straps 101 from tilting or flipping outward, and greatly improving the consistency and aesthetics of the appearance of footwear products. The outer side of the fixing base 1 is provided with a positioning surface 11 that fits against the inner side of the heel of the upper 100. The positioning surface 11 is a convex surface that matches the curved surface of the heel of the upper 100. The inner side of the fixing base 1 is provided with a contact surface 12 that fits against the outer side of the heel of the last 200. The contact surface 12 is a concave surface that matches the curved surface of the heel of the last 200. The positioning surface 11 and the contact surface 12 form a bidirectional curved fitting structure, so that when the fixing base 1 is inserted into the gap between the last 200 and the upper 100, the positioning surface 11 and the inner side of the upper, and the contact surface 12 and the outer side of the last 200, simultaneously achieve surface contact, forming a gapless clamping and positioning. In this way, the fixing base 1, through the positioning surface 11 and the contact surface... The bidirectional curve formed by 12 fits snugly into the gap between the shoe last 200 and the upper 100, forming a gapless clamping and positioning, improving the tooling's anti-displacement ability. In subsequent sewing, gluing and other processes, the tooling always remains stable, providing reliable protection for production. The fixed base 1 has a tapered structure that is thicker at the top and thinner at the bottom. In this way, when the fixed base 1 is embedded in the gap between the shoe last 200 and the upper 100, it becomes tighter and tighter. The bottom of the fixed base 1 extends downward to form two legs 13. The legs 13 are V-shaped and open from top to bottom, which can be inserted into the gap between the shoe last 200 and the upper 100. The legs 13 have a tapered structure that is wider at the top and narrower at the bottom, and their ends are provided with anti-scratch rounded corners to avoid scratching the inside of the upper 100.

[0018] like Figure 3 As shown, the shoe rear pull strap positioning fixture of this utility model is an auxiliary tool in the shoe manufacturing process. The positioning fixture is used from the completion of the upper to the heat setting stage. When in use, the fixing base 1 is embedded in the gap between the shoe last 200 and the upper 100. The rear pull strap 101 is manually inserted from the clamping end 22 to position it, so that the rear pull strap is kept upright and tilted backward. After completion, it is transferred to the heat setting process for heating and setting. After the above process is completed, the rear pull strap 101 is manually removed from the clamping end 22 and the fixing base 1 is removed to prevent the rear pull strap from tilting or turning outward.

[0019] This invention uses a fixed base to install a positioning fixture on the inner side of the heel of the shoe upper. The rear pull strap is inserted through the clamping end, and the shape and position of the clamping end limit the lateral offset, forward and backward tilt, and flipping angle of the pull strap, achieving three-dimensional constraint on the rear pull strap. This positions the rear pull strap, ensuring it remains upright and tilted backward throughout the production process, preventing deformation such as skewing or outward turning, and significantly improving the consistency and aesthetics of the footwear product. The fixed base, through a bidirectional curved fitting structure formed by the positioning surface and the contact surface, is embedded in the gap between the shoe last and the shoe upper, forming a gapless clamping and positioning, improving the fixture's anti-displacement capability. During subsequent sewing, gluing, and other processes, the fixture remains stable, providing reliable assurance for production.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shoe heel pull tab positioning fixture, characterized in that: The tooling body includes a fixed base installed on the inner side of the heel of the shoe upper and a clamping arm connected to the fixed base. One end of the clamping arm is a connecting end connected to the fixed base, and the other end is a clamping end. The clamping end extends from one side of the shoe upper to the other side to form a positioning and guiding structure. The rear pull strap is inserted into the clamping end, and the position and angle of the rear pull strap are constrained by the clamping end.

2. The shoe heel pull tab positioning fixture according to claim 1, characterized in that: The clamping arm is 7-shaped, and a positioning gap is formed between the clamping end and the fixed base.

3. The shoe heel pull tab positioning fixture according to claim 1 or 2, characterized in that: The clamping end is an arc-shaped surface that smoothly transitions from the end of the connecting end to the end of the clamping end.

4. The shoe heel pull tab positioning fixture according to claim 1, characterized in that: The outer side of the fixed base is provided with a positioning surface that fits against the inner side of the heel of the shoe upper. The positioning surface is a convex surface that matches the curved surface of the heel of the shoe upper.

5. The shoe heel pull tab positioning fixture according to claim 4, characterized in that: The inner side of the fixing base is provided with a contact surface that fits against the outer side of the heel of the shoe last. The contact surface is a concave surface that matches the curved surface of the heel of the shoe last. The positioning surface and the contact surface form a two-way curved fitting structure, so that when the fixing base is embedded in the gap between the shoe last and the upper, the convex surface and the inner side of the upper, and the concave surface and the outer side of the shoe last make surface contact simultaneously, forming a gapless clamping and positioning.

6. The shoe heel pull tab positioning fixture according to claim 5, characterized in that: The bottom of the fixed base extends downward to form two legs, which are spread out from top to bottom in a figure-eight shape.

7. The shoe heel pull tab positioning fixture according to claim 6, characterized in that: The support legs have a tapering structure that is wider at the top and narrower at the bottom.

8. The shoe heel pull tab positioning fixture according to claim 6 or 7, characterized in that: The ends of the support legs are provided with scratch-resistant rounded corners.

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