A shoe last detection device and detection method for an intelligent production line of adhesive shoes

Abstract

A shoe last inspection device for an intelligent production line of adhesive shoes includes a shoe last mounted on a horizontal moving mechanism, a U-shaped signal transmitting box arranged perpendicular to the moving direction of the shoe last, a heel signal transmitting point on one side plate of the signal transmitting box, a toe signal measuring point on the other side plate, and a metatarsophalangeal edge signal transmitting point on the top plate of the signal transmitting box. The shoe last is equipped with signal receiving points corresponding to each signal transmitting point. This invention utilizes laser or infrared signal transceiver technology to detect situations where deformation of the metatarsophalangeal region of the shoe last causes an upward tilt in the forefoot area, determining whether the shoe last's spatial dimensions are deformed. This ensures the conformity of shoe lasts in the intelligent production line for adhesive leather shoes, effectively and promptly screening out deformed shoe lasts from the horizontal moving mechanism. This ensures the standardized tooling (shoe lasts) required for the intelligent production line, reducing errors in subsequent processes caused by shoe last deformation and thus minimizing product quality issues.

Description

Technical Field

[0001] This invention belongs to the field of shoemaking, specifically relating to a shoe last inspection device and inspection method for an intelligent production line for adhesive shoes. Background Technology

[0002] The inspection of the last and sole of glued leather shoes generally adopts a manual bonding method, which involves taking a last and sole sample → manually bonding and comparing → checking the conformity of the last and sole edges → confirming the result. During the use of shoe lasts on intelligent production lines, in addition to ensuring the consistency of the last and sole edges with the last sample, it is also necessary to ensure the consistency of the spatial height dimensions of the last and sole with the design space. This is to guarantee that the intelligent production line products can accurately complete robotic operations such as upper and sole fraying, upper and cuff fraying, upper treatment, and upper adhesive application. However, during the production process of shoe lasts on intelligent production lines, certain processes inevitably require high-temperature heating, low-temperature shaping, or pressing, resulting in varying degrees of deformation of the shoe last, especially the deformation of the forefoot. Some deformations are severe, affecting the changes in the spatial height dimensions of the last and sole, inevitably causing changes in the spatial dimensions of the semi-finished last and sole, and consequently, changes in the processing precision of the upper. Therefore, precise testing of the shoe lasts and soles is essential to ensure that the spatial dimensions of the shoe lasts on the intelligent production line meet the requirements. Shoe lasts that do not meet the requirements can be detected in a timely manner. This is the foundation for the intelligent production line to effectively implement precise foot support processing and proper outsole fitting. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this invention provides a shoe last inspection device and inspection method for an intelligent production line for adhesive shoes.

[0004] The object of this invention is achieved in the following manner:

[0005] A shoe last inspection device for an intelligent production line of adhesive shoes includes a shoe last, which is mounted on a horizontal moving mechanism. A U-shaped signal transmitting box is set perpendicular to the moving direction of the shoe last. A signal transmitting point for the heel of the shoe last is set on one side plate of the signal transmitting box, and a signal measuring point for the toe of the shoe last is set on the other side plate. A signal transmitting point for the metatarsophalangeal edge is set on the top plate of the signal transmitting box. Signal receiving points corresponding to each signal transmitting point are set on the shoe last.

[0006] The metatarsophalangeal edge signal transmission points include the first metatarsophalangeal edge signal transmission point and the fifth metatarsophalangeal edge signal transmission point, and the corresponding metatarsophalangeal edge signal receiving points include the first metatarsophalangeal edge signal receiving point and the fifth metatarsophalangeal edge signal receiving point.

[0007] The shoe last tip signal measurement point includes a shoe last detection control point and a defective shoe last trigger point set at the top and bottom, with a vertical distance of 3mm between the shoe last detection control point and the defective shoe last trigger point; the shoe last tip is provided with a first signal receiving point and a second signal receiving point corresponding to the shoe last detection control point and the defective shoe last trigger point.

[0008] The horizontal moving mechanism includes a track, a shoe last fixing tray slidably connected to the track, and a driving mechanism. The shoe last is installed on the shoe last fixing tray, and the shoe last fixing tray slides along the track under the drive of the driving mechanism.

[0009] The method for inspecting shoe lasts on an intelligent production line for adhesive-bonded shoes includes the following steps.

[0010] As the shoe last moves into the U-shaped signal transmission box along the horizontal moving mechanism, the detection mechanism is activated when the signal receiving point on the metatarsophalangeal edge of the shoe last receives the signal transmitted from the signal transmitting point on the metatarsophalangeal edge.

[0011] When the heel signal receiving point of the shoe last receives the signal emitted by the heel signal transmitting point of the shoe last, the shoe last is in place and the testing begins;

[0012] The shoe last inspection control point and the unqualified shoe last trigger point emit signals. When the first signal receiving point and the second signal receiving point receive the signal at the same time, the shoe last is not deformed and is a standard shoe last.

[0013] When the first signal receiving point does not receive a signal, but the second signal receiving point receives a signal, the shoe last will be slightly deformed.

[0014] When both the first and second signal receiving points fail to receive a signal, the shoe last will deform.

[0015] The signals emitted by the signal emission points at the metatarsophalangeal edge, the heel of the shoe last, and the toe of the shoe last are laser or infrared signals.

[0016] Compared to existing technologies, this invention utilizes signal transmission and reception technology to detect situations where deformation of the toe area of ​​the shoe last causes an upward tilt in the forefoot area. This allows for the determination of whether the shoe last's spatial dimensions are deformed, achieving the purpose of monitoring shoe lasts on intelligent production lines. This ensures the conformity of shoe lasts on intelligent production lines for glued leather shoes, and enables timely and effective screening of deformed shoe lasts through a horizontal moving mechanism. It also ensures that the standardized tooling (shoe lasts) required for intelligent production lines is maintained, effectively reducing errors in subsequent processes caused by shoe last deformation and thus preventing product quality accidents. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the signal measurement point and the signal receiving point of the toe of the shoe last when the shoe last is deformed. Detailed Implementation

[0020] The accuracy and stability of the shoe last's position and spatial height dimensions on the intelligent production line are crucial. While the position of the shoe last on the intelligent production line has little impact on its overall shape due to fixed mounting points, changes in its spatial height dimensions have a significant impact and require monitoring and assessment. Spatial height dimensions mainly refer to the height dimensions of the front edge, rear edge, first metatarsophalangeal joint, and fifth metatarsophalangeal joint of the last. These dimensions include: ① the designed height of the shoe last itself, plus the thickness of the last's upper clamp; ② the thickness of the last connecting plate; and ③ the effective height of the last support plate. These three factors constitute the spatial height dimensions of the shoe last on the intelligent production line.

[0021] In the design of single or paired shoe lasts, to maintain the uniformity of the spatial shape and height dimensions of the last's outer contour, corresponding alignment points for the outer contour are designed for different shoe sizes and models. This is mainly achieved by confirming the spatial positions of the front edge, rear edge, first metatarsophalangeal edge, and fifth metatarsophalangeal edge of the last to control the spatial shape of the outer contour. The spatial height of the outer contour is controlled by confirming the corresponding spatial height dimensions of these edge points, namely the spatial height dimensions of the front edge, rear edge, first metatarsophalangeal edge, and fifth metatarsophalangeal edge.

[0022] To effectively control the changes in the height of the toe box and the height of the inner and outer ankle toe and metatarsal edges of the shoe last in an intelligent production line for adhesive leather shoes, and to maintain the consistency between the spatial height of the last base and the design space, this invention provides a shoe last detection device and detection method for an intelligent production line for adhesive leather shoes. It is particularly important to note that the deformation of the shoe last mainly occurs at the signal receiving point on the metatarsophalangeal edge. This is because the signal receiving point on the metatarsophalangeal edge is a stress-bearing area during the lasting process, and the shoe needs to be heated after lasting. Therefore, the signal receiving point on the metatarsophalangeal edge is most prone to deformation. Deformation at the signal receiving point on the metatarsophalangeal edge will cause the forefoot of the shoe last to warp upwards. When the warp reaches 3mm, the shoe last will become unusable. Therefore, after the shoe last reaches the designated position through the horizontal moving mechanism 3, if the trigger point 232 of the unqualified shoe last cannot receive the beam feedback information, it means that the warp of the forefoot of the shoe last is greater than 3mm, the shoe last is significantly deformed, and it is considered an unqualified tool.

[0023] like Figure 1 As shown, a shoe last inspection device for an intelligent production line of adhesive shoes includes a shoe last 1, which is mounted on a horizontal moving mechanism. A U-shaped signal transmitting box 2 is arranged perpendicular to the moving direction of the shoe last. A shoe last heel signal transmitting point 22 is arranged on one side plate of the signal transmitting box 2, and a shoe last toe signal measuring point 23 is arranged on the other side plate. A metatarsophalangeal edge signal transmitting point 21 is arranged on the top plate of the signal transmitting box. A shoe last heel signal receiving point 25 corresponding to the shoe last heel signal transmitting point 22, a shoe last toe signal receiving point 26 corresponding to the shoe last toe signal measuring point 23, and a shoe last metatarsophalangeal edge signal receiving point 24 corresponding to the shoe last metatarsophalangeal edge signal transmitting point 21 are arranged on the shoe last 1.

[0024] Furthermore, the metatarsophalangeal edge signal transmitting point 21 includes a first metatarsophalangeal edge signal transmitting point 211 and a fifth metatarsophalangeal edge signal transmitting point 212, and the metatarsophalangeal edge signal receiving point 24 includes a first metatarsophalangeal edge signal receiving point 241 and a fifth metatarsophalangeal edge signal receiving point 242.

[0025] The shoe last toe signal measurement point 23 includes a shoe last detection control point 231 and a defective shoe last trigger point 232, which are arranged vertically. The vertical distance between the shoe last detection control point 231 and the defective shoe last trigger point 232 is 3mm. The shoe last toe signal receiving point 26 includes a first signal receiving point 261 and a second signal receiving point 262, which are arranged vertically and correspond to the positions of the shoe last detection control point 231 and the defective shoe last trigger point 232, respectively.

[0026] The "correspondence" or "relative correspondence" mentioned above regarding signal transmission and reception points refers to positional correspondence, not a unique correspondence between a signal transmission point and its corresponding signal reception point. For example, the signal transmitted by the shoe last detection control point 232 is received by the second signal reception point 262. When the forefoot area of ​​the shoe last deforms and warps, the position of the shoe last detection control point 232 will correspond to the second signal reception point 262. In this case, the signal transmitted by the shoe last detection control point 232 can be received by the second signal reception point 262. Similarly, the signal transmitted by the first metatarsophalangeal edge signal transmission point 211 can be received by both the first metatarsophalangeal edge signal reception point 241 and the fifth metatarsophalangeal edge signal reception point 242. Figure 1 As shown, when the shoe last 1 moves into the U-shaped signal transmitting box 2 along with the horizontal moving mechanism 3, the first metatarsophalangeal edge signal transmitting point 211 is on the outside. The signal transmitted by the first metatarsophalangeal edge signal transmitting point 211 is first received by the fifth metatarsophalangeal edge signal receiving point 242, thus activating the detection mechanism.

[0027] The horizontal movement mechanism includes a track 31, a shoe last fixing tray 32 slidably connected to the track, and a drive mechanism. The shoe last 1 is installed on the shoe last fixing tray 32, and the shoe last fixing tray 32 slides along the track 31 under the drive of the drive mechanism.

[0028] The horizontal movement mechanism currently used in the factory is a flow chart production line. A flow chart production line is a highly efficient, stable, and low-cost production organization method. It divides the production process into a series of continuous stages, which are then carried out in a specific sequence and within time constraints, aiming to improve production efficiency, reduce waste, and lower costs. This production method requires that each stage's tasks be performed according to standardized operating procedures and schedules to ensure the stability and predictability of the production process. It also requires collaboration and communication between stages to reduce waste and unnecessary costs during production.

[0029] A method for inspecting shoe lasts on an intelligent production line for adhesive-bonded shoes includes the following steps:

[0030] As the shoe last 1 moves with the horizontal moving mechanism 3 into the U-shaped signal transmitting box 2, the detection mechanism is activated when the toe-toe edge signal receiving point 24 of the shoe last receives the signal emitted by the toe-toe edge signal transmitting point 21; specifically, this means that, for example... Figure 1 As shown, if the fifth metatarsophalangeal edge is the first to enter the gate-shaped signal transmitting box 2, then the fifth metatarsophalangeal edge signal receiving point 242 will first receive the signal transmitted by the first metatarsophalangeal edge signal transmitting point 211, thus initiating the detection mechanism. If the first metatarsophalangeal edge is the first to enter the gate-shaped signal transmitting box 2, then the first metatarsophalangeal edge signal receiving point 241 will receive the signal transmitted by the first metatarsophalangeal edge signal transmitting point 211, thus initiating the detection mechanism.

[0031] The shoe last 1 continues to move into the U-shaped signal transmitting box 2 along with the horizontal moving mechanism 3. When the shoe last heel signal receiving point 25 receives the signal transmitted by the shoe last heel signal transmitting point 22, it indicates that the shoe last 1 has arrived in place and the testing begins.

[0032] When the inspection begins, the shoe last inspection control point 231 and the unqualified shoe last trigger point 232 transmit signals. When the first signal receiving point 261 and the second signal receiving point 262 corresponding to the shoe last inspection control point 231 and the unqualified shoe last trigger point 232 receive signals at the same time, it indicates that the shoe last 1 is not deformed and is a standard shoe last.

[0033] When the first signal receiving point 261 does not receive a signal, but the second signal receiving point 262 receives a signal, it indicates that the shoe last 1 has a slight deformation and can continue to be used.

[0034] like Figure 3As shown, when both the first signal receiving point 261 and the second signal receiving point 262 fail to receive a signal, it indicates that the shoe last has deformed and cannot be used further. It should be noted that the simultaneous failure of both signal receiving points 261 and 262 to receive a signal means that both points are located below the height of the defective shoe last trigger point 232. Theoretically, if the height of the first signal receiving point 261 is between the shoe last detection control point 231 and the defective shoe last trigger point 232, both points 261 and 262 would also fail to receive a signal simultaneously. However, since the vertical distance between the shoe last detection control point 231 and the defective shoe last trigger point 232 is only 3mm, and the vertical distance between the first signal receiving points 261 and 262 is also 3mm, this situation is negligible.

[0035] Furthermore, when the first signal receiving point 261 and the second signal receiving point 262 fail to receive signals simultaneously, an alarm is triggered, reminding workers to process the substandard shoe lasts, or to transfer the shoe lasts to the repair point for repair or disposal via the horizontal moving mechanism 3.

[0036] Furthermore, the signals emitted by the metatarsophalangeal edge signal emission point 21, the heel signal emission point 22, and the toe signal measurement point 23 are laser or infrared signals.

[0037] This invention utilizes laser or infrared signal transmission and reception technology to detect situations where deformation of the toe area of ​​the shoe last causes an upward tilt in the forefoot area. This allows for the determination of whether the shoe last's spatial dimensions are deformed, achieving the purpose of monitoring shoe lasts on intelligent production lines. This ensures the conformity of shoe lasts on intelligent production lines for glued leather shoes, and enables timely and effective screening of deformed shoe lasts through a horizontal moving mechanism. It also ensures that the standardized tooling (shoe lasts) required for intelligent production lines is maintained, effectively reducing errors in subsequent processes caused by shoe last deformation and thus preventing product quality accidents.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A shoe last inspection device for an intelligent production line of adhesive shoes, characterized in that: Includes a shoe last (1), which is mounted on a horizontal moving mechanism (3). A gate-shaped signal transmitting box (2) is set perpendicular to the moving direction of the shoe last. A shoe last heel signal transmitting point (22) is set on one side plate of the signal transmitting box, and a shoe last toe signal measuring point (23) is set on the other side plate. A metatarsophalangeal edge signal transmitting point (21) is set on the top plate of the signal transmitting box. A signal receiving point corresponding to each signal transmitting point is set on the shoe last. The metatarsophalangeal edge signal transmission point (21) includes the first metatarsophalangeal edge signal transmission point (211) and the fifth metatarsophalangeal edge signal transmission point (212). The metatarsophalangeal edge signal receiving point (24) corresponding to the metatarsophalangeal edge signal transmission point (21) includes the first metatarsophalangeal edge signal receiving point (241) and the fifth metatarsophalangeal edge signal receiving point (242). The shoe last tip signal measurement point (23) includes a shoe last detection control point (231) and a defective shoe last trigger point (232) set vertically. The vertical distance between the shoe last detection control point (231) and the defective shoe last trigger point (232) is 3mm. The shoe last tip is provided with a first signal receiving point (261) and a second signal receiving point (262) corresponding to the shoe last detection control point (231) and the defective shoe last trigger point (232).

2. The shoe last inspection device for an intelligent production line of adhesive shoes according to claim 1, characterized in that: The horizontal moving mechanism includes a track (31), a shoe last fixing tray (32) slidably connected to the track, and a driving mechanism. The shoe last (1) is installed on the shoe last fixing tray (32), and the shoe last fixing tray (32) slides along the track (31) under the drive of the driving mechanism.

3. A method for inspecting shoe lasts on an intelligent production line for adhesive-bonded shoes using the apparatus described in any one of claims 1-2, characterized in that: Includes the following steps, The shoe last (1) moves into the gate-shaped signal transmitting box (2) along with the horizontal moving mechanism (3). When the toe edge signal receiving point (24) of the shoe last receives the signal transmitted by the toe edge signal transmitting point (21), the detection mechanism is activated. When the heel signal receiving point (25) of the shoe last receives the signal emitted by the heel signal transmitting point (22) of the shoe last, the shoe last (1) is in place and the detection begins; The shoe last detection control point (231) and the unqualified shoe last trigger point (232) emit signals. When the first signal receiving point (261) and the second signal receiving point (262) receive the signals at the same time, the shoe last (1) is not deformed and is a standard shoe last. When the first signal receiving point (261) does not receive a signal, but the second signal receiving point (262) receives a signal, the shoe last (1) will be slightly deformed. When the first signal receiving point (261) and the second signal receiving point (262) fail to receive signals at the same time, the shoe last will deform.

4. The method according to claim 3, characterized in that: The signals emitted by the signal emission point (21) at the metatarsophalangeal edge, the signal emission point (22) at the heel of the shoe last, and the signal measurement point (23) at the toe of the shoe last are laser or infrared signals.

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