Automatic last rotating mechanism of upper pulling machine

Abstract

The utility model discloses an automatic shoe last transferring mechanism of an upper pulling machine, which comprises a shoe last transferring support, a lifting seat in up-down sliding fit with the shoe last transferring support is arranged on the shoe last transferring support, and a first lifting driving device is connected between the shoe last transferring support and the lifting seat; a rotating seat is rotationally connected to the lifting seat, and a rotating driving device linked with the rotating seat is mounted on the lifting seat; and at least two shoe tree mounting parts for mounting shoe trees are arranged on the rotating seat around the rotating axis of the rotating seat. The automatic last rotating mechanism of the upper pulling machine is beneficial to optimizing production steps and improving production efficiency.

Description

Technical Field

[0001] The utility model relates to the field of shoe uppers, in particular to an automatic last turning mechanism of an upper machine. Background Art

[0002] The upper of injection molded shoes is generally first formed on the upper mold, and then the upper mold and the upper are put into the injection molding machine together to injection mold the sole so that the sole and the upper are firmly bonded together. Since a lot of labor is reduced in the production process, the price is affordable, and since no glue is used in the sole molding process, the harm of glue to the human body can be avoided.

[0003] The shoe last is the mother of the shoe and the molding mold of the shoe. In the traditional lasting machine, each station is only equipped with a single shoe last, which can be put on the upper, and then the upper is pressed down with the shoe last on the top of the sole injection mold for injection molding. However, after the sole is solidified, the shoe last needs to be separated from the sole mold, and the shoe with the molded sole needs to be removed from the shoe last and put on a new upper before the next sole injection molding operation can be carried out. The production cycle is long and the production efficiency cannot be further improved. Utility Model Content

[0004] The utility model aims to provide an automatic shoe last turning mechanism for a lasting machine, which is beneficial to optimizing production steps and improving production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides an automatic last turning mechanism of a last lasting machine, including a last turning support, a lifting seat which is slidably matched with the last turning support, a first lifting drive device is connected between the last turning support and the lifting seat; a rotating seat is rotatably connected to the lifting seat, and a rotating drive device which is linked to the rotating seat is installed on the lifting seat; at least two shoe last mounting parts for mounting shoe lasts are provided on the rotating seat around its rotation axis.

[0006] As a further improvement of the utility model, the shoe last is detachably connected to the shoe last mounting portion.

[0007] As a further improvement of the utility model, the rotating seat is connected to a rotating shaft, which is rotatably connected to the lifting seat; the rotating drive device includes a device bracket arranged on the lifting seat, a hydraulic cylinder body is installed on the device bracket, the hydraulic cylinder body is connected to a telescopic rod, the telescopic rod is connected to a rack arranged parallel to the telescopic rod through a connecting block, and a gear is connected to the rotating shaft, and the rack is meshed with the gear.

[0008] As a further improvement of the present invention, a sliding groove is provided on the device bracket, and the rack is slidably matched with the sliding groove of the device bracket.

[0009] As a further improvement of the utility model, the lifting seat is connected with a toe pressing structure via a second lifting drive device, and the toe pressing structure corresponds to the toe of the shoe last.

[0010] As a further improvement of the present invention, the rotation axis of the rotating seat is arranged obliquely downward, and the angle between the mounting end surface of each shoe last mounting portion and the rotation axis of the rotating seat is less than 45°.

[0011] As a further improvement of the present invention, a second travel switch is provided on the rotary shoe support, and the second travel switch is adapted to the lifting seat; the second travel switch and the first lifting drive device are both electrically connected to the controller.

[0012] As a further improvement of the present invention, a lifting guide rail is installed on the rotating shoe last support, and the lifting seat is slidably connected to the lifting guide rail.

[0013] Beneficial Effects

[0014] Compared with the prior art, the advantages of the automatic last turning mechanism of the lasting machine of the utility model are:

[0015] 1. Since at least two shoe last mounting parts for mounting shoe lasts are arranged around the rotating axis of the rotating seat, when the downward-facing shoe last is assembled with the sole mold located below it for sole injection molding and waiting for the sole injection molding to solidify, the personnel can perform the operation of sleeve-on uppers on the remaining idle shoe lasts. After the upper of the shoe last at the bottom is connected with the sole injection molding and the mold is opened, the upper shoe last that has been pre-sleeved can be rotated downward by the rotating drive device, and it can be lowered and assembled with the sole mold below by the first lifting drive device to perform the sole injection molding step of the new shoe, while the shoe last and the finished shoe originally located below are rotated upward, manually removed from the shoe last and a new upper is put on, waiting for the next sole injection molding operation. The automatic shoe last rotating mechanism can make full use of the time of mid-sole injection molding and waiting for the sole injection molding part to solidify to remove the finished shoes of the spare shoe last and put on the new shoe upper, which is conducive to optimizing the production steps and improving the production efficiency.

[0016] 2. The shoe last and the shoe last mounting part are detachably connected, and the shoe last of corresponding size or specification can be replaced according to needs.

[0017] 3. The rotary drive device uses a hydraulic cylinder to drive the rack, and the rack drives the gear, thereby driving the rotating seat to rotate. The hydraulic cylinder can be placed horizontally to reduce the vertical space occupied.

[0018] 4. When the shoe last with the upper is pressed down on the top of the sole mold, since the toe part extends forward, if a certain downward pressure is not applied to it, the toe part of the shoe last is easily lifted up by the injection plastic below and floats during the sole injection molding, resulting in inaccurate local dimensions of the sole. Therefore, during the injection molding process, it is necessary to drive the toe pressing structure downward through the second lifting drive device, so that the toe pressing structure applies downward pressure to the toe of the shoe last, prevent the toe from floating, and improve the size consistency of the sole after injection molding.

[0019] 5. The rotation axis of the rotating seat is arranged obliquely downward, and the angle between the mounting end surface of each shoe last mounting part and the rotation axis of the rotating seat is less than 45°. When the spare shoe last is rotated to face upward, the shoe last faces obliquely upward, which is convenient for personnel to remove the finished shoes on the shoe last and put on new shoe uppers.

[0020] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a three-dimensional diagram of the automatic last turning mechanism of the lasting machine;

[0023] Figure 2 This is the left view of the automatic last turning mechanism of the lasting machine;

[0024] Figure 3 is a perspective view of a rotary drive device;

[0025] Figure 4 This is the left view of the automatic last turning mechanism of the lasting machine equipped with the shoe last. DETAILED DESCRIPTION

[0026] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] Example

[0028] The specific implementation of the utility model is as follows Figures 1 to 4As shown, an automatic last turning mechanism 2 of a shoe last drawing machine includes a last turning support 21, on which a lifting seat 22 is provided for sliding up and down cooperation therewith, and a first lifting drive device 23 is connected between the last turning support 21 and the lifting seat 22. A rotating seat 25 is rotatably connected to the lifting seat 22, and a rotating drive device 26 linked to the rotating seat 25 is installed on the lifting seat 22. At least two shoe last mounting parts 251 for mounting a shoe last 29 are provided around the rotating axis of the rotating seat 25. In this embodiment, only two shoe last mounting parts 251 are provided on the rotating seat 25. A mold closing mechanism 1 is connected below the automatic last turning mechanism 2 of the shoe last drawing machine, and the mold closing mechanism 1 is used to drive the mold of the sole to close the mold. The shoe last 29 is detachably connected to the shoe last mounting part 251 through a bolt and nut structure.

[0029] The rotating seat 25 is connected to a rotating shaft 252, and the rotating shaft 252 is rotatably connected to the lifting seat 22. The rotating driving device 26 includes a device bracket 266 disposed on the lifting seat 22, and a hydraulic cylinder body 261 is installed on the device bracket 266. The hydraulic cylinder body 261 is movably connected to a telescopic rod 262, and the telescopic rod 262 is connected to a rack 264 arranged parallel to it through a connecting block. A gear 265 is connected to the rotating shaft 252, and the rack 264 is meshed with the gear 265. In this embodiment, the hydraulic cylinder body 261, the telescopic rod 262 and the rack 264 are all located above the gear 265.

[0030] A sliding groove is provided on the device bracket 266, and the rack 264 is slidably matched with the sliding groove of the device bracket 266 to improve the stability of the rack 264 when moving in a straight line.

[0031] The lifting seat 22 is connected to a toe pressing structure 28 via a second lifting drive device 281, and the toe pressing structure 28 corresponds to the toe of the shoe last 29. Both the first lifting drive device 23 and the second lifting drive device 281 are hydraulic cylinder structures.

[0032] The rotation axis of the rotating seat 25 is arranged obliquely downward, and the angle between the mounting end surface of each shoe last mounting portion 251 and the rotation axis of the rotating seat 25 is less than 45°. When the spare shoe last 29 is rotated to face upward, the shoe last faces obliquely upward, which facilitates the personnel to remove the finished shoes and put on the new upper on the shoe last 29. The shoe last 29 at the bottom is arranged vertically downward.

[0033] The last support 21 is provided with a second travel switch 27, which is adapted to the lifting seat 22. The second travel switch 27 and the first lifting drive device 23 are both electrically connected to the controller. Two second travel switches 27 can be provided, one on each of the upper and lower sides of the lifting seat 22, to limit the lifting range of the lifting seat 22.

[0034] A lifting rail 24 is installed on the rotary shoe support 21, and the lifting seat 22 is slidably connected to the lifting rail 24. In this embodiment, the lifting rail 24 is vertically arranged and is two in number, and is located on the left and right sides of the lifting seat 22 respectively.

[0035] When in use, the shoe last 29 with the upper is rotated to be arranged downward, the first lifting drive device 23 drives the lifting seat 22 and the shoe last 29 to descend to a predetermined position, and then the mold closing mechanism 1 drives the sole mold to close the mold, and a sole cavity to be injected is formed between the mold and the bottom of the upper. The second lifting drive device 281 drives the toe pressing structure 28 to move downward and press on the toe position of the shoe last 29. The injection molding mechanism injects into the sole cavity, and after the sole injection molded part is solidified, the mold closing mechanism 1 drives the sole mold to open the mold, the toe pressing structure 28 and the lifting seat 22 are reset upward, and the downward shoe last 29 is rotated to face upward by the rotating drive device 26, and the finished shoe on the shoe last 29 can be removed.

[0036] During the above-mentioned injection molding process and the process of waiting for the injection-molded sole to solidify, personnel can remove the finished shoes from the spare shoe last 29 arranged upward on the rotating seat 25 and put on new shoe uppers, which can make full use of the time waiting for the injection-molded sole to solidify and improve production efficiency.

[0037] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. An automatic last turning mechanism of a lasting machine, characterized in that: The invention comprises a rotating last support (21), a lifting seat (22) which is slidably matched with the rotating last support (21), a first lifting drive device (23) being connected between the rotating last support (21) and the lifting seat (22); a rotating seat (25) being rotatably connected to the lifting seat (22), a rotating drive device (26) which is linked to the rotating seat (25) being installed on the lifting seat (22); and at least two shoe last mounting parts (251) for mounting a shoe last (29) are arranged on the rotating seat (25) around its rotation axis.

2. The automatic last turning mechanism of the lasting machine according to claim 1, characterized in that: The shoe last mounting portion (251) is detachably connected to a shoe last (29).

3. The automatic last turning mechanism of the lasting machine according to claim 1 or 2, characterized in that: The rotating seat (25) is connected to a rotating shaft (252), and the rotating shaft (252) is rotatably connected to the lifting seat (22); the rotating driving device (26) comprises a device bracket (266) arranged on the lifting seat (22), a hydraulic cylinder body (261) is installed on the device bracket (266), the hydraulic cylinder body (261) is connected to a telescopic rod (262), the telescopic rod (262) is connected to a rack (264) arranged parallel to the telescopic rod (262) through a connecting block, and a gear (265) is connected to the rotating shaft (252), and the rack (264) is meshed with the gear (265).

4. The automatic last turning mechanism of the lasting machine according to claim 3, characterized in that: The device bracket (266) is provided with a sliding groove, and the rack (264) is slidably matched with the sliding groove of the device bracket (266).

5. The automatic last turning mechanism of the lasting machine according to claim 1 or 2, characterized in that: The lifting seat (22) is connected to a toe pressing structure (28) via a second lifting drive device (281), and the toe pressing structure (28) corresponds to the toe of the shoe last (29).

6. The automatic last turning mechanism of the lasting machine according to claim 1, characterized in that: The rotation axis of the rotating seat (25) is arranged obliquely downward, and the angle between the mounting end surface of each shoe last mounting portion (251) and the rotation axis of the rotating seat (25) is less than 45°.

7. The automatic last turning mechanism of the lasting machine according to claim 1, characterized in that: The rotary shoe support (21) is provided with a second travel switch (27), and the second travel switch (27) is adapted to the lifting seat (22); the second travel switch (27) and the first lifting drive device (23) are both electrically connected to the controller.

8. The automatic last turning mechanism of the lasting machine according to claim 1, characterized in that: A lifting guide rail (24) is installed on the rotating shoe support (21), and the lifting seat (22) is slidably connected to the lifting guide rail (24).

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