CN115067631A

CN115067631A - Shoe making machine and shoe last clamping device thereof

Info

Publication number: CN115067631A
Application number: CN202110282179.4A
Authority: CN
Inventors: 温修锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2022-09-20

Abstract

A shoe making machine and a last clamping device thereof are provided, wherein the last clamping device is suitable for being installed on a machine body unit and used for clamping a last with two clamped parts, and the last clamping device of the shoe making machine comprises a base unit, a driving unit and a clamping unit. The driving unit comprises an abutting piece which can move relative to the base unit. The clamping unit comprises two clamping pieces which are arranged at intervals and pivoted on the base unit, each clamping piece is provided with a stress end adjacent to the pushing and supporting piece and a clamping end opposite to the stress end, the pushing and supporting piece of the driving unit can push the stress end of the clamping piece, so that the clamping ends are close to each other and can clamp the clamped part of the shoe last, the shoe last can be detached from the clamping unit, and the operation efficiency and the forming quality of the shoe making machine can be improved.

Description

Shoe making machine and shoe last clamping device thereof

Technical Field

The invention relates to a clamping device, in particular to a shoe making machine and a last clamping device thereof.

Background

The existing manual shoemaking pressing machine comprises a base, a synthesis die arranged on the base, a lifting mechanism capable of lifting and arranged on the base, and a last fixed on the lifting mechanism, positioned above the synthesis die and moved along with the lifting mechanism, wherein the last is used for wearing a shoe body.

However, since the last is fixed on the lifting mechanism and above the synthesis mold, a user needs to hold the shoe body and match the position and angle of the last to put the shoe body on the last, which is inconvenient to operate and takes a long time to put on the shoe body, resulting in low operation efficiency. In addition, since the last is not easily removed, it is impossible to inspect whether the shoe body is inclined or not in a comprehensive manner, and therefore, the alignment between the shoe body and the shoe sole is not accurate when the shoe body and the shoe sole are pressed together, and the molding quality is reduced.

Disclosure of Invention

One of the objects of the present invention is to provide a last clamping device of a shoe making machine which can improve the work efficiency and improve the molding quality.

The last clamping device of the shoe making machine is suitable for being installed on a machine body unit and used for clamping a last, the last is provided with two clamped parts which are arranged at intervals, the last clamping device of the shoe making machine comprises a base unit, a driving unit and a clamping unit, the base unit is arranged on the machine body unit, the driving unit is arranged on the base unit, the driving unit comprises a pushing and abutting part which can move relative to the base unit along the front-back direction, the clamping unit can move and is arranged on the base unit, the clamping unit comprises two clamping parts which are arranged at intervals along the left-right direction and are pivoted on the base unit, each clamping part is provided with a stressed end adjacent to the pushing and abutting part and a clamping end opposite to the stressed end, the pushing and abutting part of the driving unit moves along the front-back direction and enables the clamping part to move relative to the base unit between a releasing state and a clamping state, in the releasing state, the force-bearing ends are separated by a distance D1, in the clamping state, the pushing and abutting piece pushes the force-bearing ends away to enable the force-bearing ends to be separated by a distance D2, and D2> D1, and the clamping piece rotates relative to the base unit until the clamping ends are relatively close to each other to clamp the clamped part of the last.

The last clamping device of the shoe making machine comprises a base wall, a shaft seat and two elastic pieces, wherein the base wall is used for arranging the driving unit, the shaft seat extends from the base wall to the bottom side along the top-bottom direction, the shaft seat is used for pivoting the clamping piece, the two elastic pieces are respectively arranged between the clamping piece and the shaft seat, and the elastic pieces constantly push the clamping end to move away from the shaft seat.

The shaft seat is provided with a fixing part arranged on the base wall and a shaft end part opposite to the fixing part in the top and bottom directions, the shaft end part is provided with two grooves which are arranged at intervals and extend along the left and right directions, each clamping piece is also provided with a mounting hole, and each elastic piece can be arranged in one groove and the respective mounting hole in a compression mode.

In the last clamping device of the shoe making machine, the shaft end part of the shaft seat is also provided with two pivot holes which are arranged at intervals and extend along the front-back direction, each clamping piece comprises a body part and two pivot parts which are arranged at intervals on the body part, the body part is provided with the stress end, the clamping end and the mounting hole, and the pivot part of each clamping piece can rotate and is connected with the respective pivot hole.

The shoe last clamping device of the shoe making machine is characterized in that the pushing and supporting part is provided with two pushing and supporting parts which are spaced in the left-right direction and respectively correspond to the clamping parts, and a notch which is formed between the pushing and supporting parts and is used for the shaft seat to penetrate through, and each pushing and supporting part extends into the space between the clamping part and the shaft seat and pushes and supports the corresponding stressed end.

According to the last clamping device of the shoe making machine, the shaft seat is provided with the fixing part arranged on the base wall, the fixing part of the shaft seat penetrates through the notch, and the pushing part is in sliding contact with the fixing part.

According to the last clamping device of the shoe making machine, the stress end of each clamping piece is provided with a first inclined surface which is used for being pushed by the corresponding pushing and supporting part and gradually shrinks from outside to inside, each pushing and supporting part of each pushing and supporting piece is provided with a first pushing and supporting surface matched with the corresponding first inclined surface in shape, and when the clamping pieces are in the release state, the first pushing and supporting surfaces are respectively pushed and supported on the first inclined surfaces.

In the last clamping device of the shoe making machine, each stressed end is also provided with a second inclined surface which extends forwards from the first inclined surface in a gradually reducing manner, each abutting part is also provided with a second abutting surface which extends backwards from the first abutting surface in a gradually expanding manner, and when the clamping piece is in the clamping state, the second inclined surfaces are respectively abutted against the second abutting surfaces.

According to the last clamping device of the shoe making machine, the base wall is provided with the containing groove which penetrates through the top bottom and the rear side of the containing groove is open, the driving unit is provided with the pressure cylinder which is positioned in the containing groove and the piston rod which can stretch and is arranged on the pressure cylinder, and one end of the piston rod is provided with the pushing and abutting piece.

Another object of the present invention is to provide a shoe making machine which can improve the working efficiency and improve the molding quality.

The invention relates to a shoe making machine, which is suitable for processing shoe materials sleeved on a shoe last, wherein the shoe last is provided with two clamped parts which are arranged at intervals, the shoe making machine comprises a machine body unit and a shoe last clamping device, the machine body unit comprises a forming die and a top seat which is arranged above the forming die, the top seat can move up and down along the top-bottom direction, the shoe last clamping device is used for clamping the shoe last and is arranged on the top seat and is driven by the top seat, the shoe last clamping device comprises a base unit, a driving unit and a clamping unit, the base unit is arranged on the top seat, the driving unit is arranged on the base unit, the driving unit comprises a pushing part which can move relative to the base unit along the front-back direction, the clamping unit can move and is arranged on the base unit, the clamping unit comprises two clamping parts which are arranged at intervals along the left-right direction and are pivoted on the base unit, each clamping piece is provided with a force bearing end which is abutted against the abutting piece and a clamping end which is opposite to the force bearing end, the abutting piece of the driving unit moves along the front-back direction and enables the clamping piece to move between a releasing state and a clamping state relative to the base unit, the force bearing ends are separated by a distance D1 in the releasing state, the abutting piece pushes away the force bearing ends to enable the force bearing ends to be separated by a distance D2 in the clamping state, the distance D2 is larger than D1, and the clamping piece rotates relative to the base unit until the clamping ends approach to each other to clamp the clamped part of the last.

The invention has the beneficial effects that: the clamping piece is driven by the driving unit to be capable of being loosened and clamping the last, the last can be mounted on the clamping unit after the shoe material is sleeved, the sleeving mode is convenient, whether the shoe material is inclined or not can be comprehensively checked, and therefore the operation efficiency and the forming quality of the shoe making machine are improved.

Drawings

FIG. 1 is a perspective assembly view illustrating one embodiment of the shoe making machine of the present invention;

FIG. 2 is a perspective assembly view illustrating a last clamping device of the embodiment in a clamping position for clamping a last;

FIG. 3 is a side view of the last clamping device according to this embodiment;

FIG. 4 is an exploded perspective view of the last retaining device according to this embodiment;

FIG. 5 is a fragmentary cross-sectional view taken along line V-V in FIG. 3;

FIG. 6 is a fragmentary cross-sectional view taken along line VI-VI in FIG. 3;

FIG. 7 is a cross-sectional view similar to FIG. 6, illustrating the last clamping device of the embodiment in a released state;

FIG. 8 is a cross-sectional view similar to FIG. 5, illustrating the last gripping device of the embodiment in the release state.

Detailed Description

Before describing the present invention in detail with reference to the drawings and examples, it should be noted that relative positional terms used in the following description, such as "left and right", "front and back", "top and bottom", "inside and outside", are based on the orientation shown in fig. 2.

Referring to fig. 1, 2 and 3, an embodiment of the shoe making machine of the present invention is adapted to process a shoe material (not shown) sleeved on a last 5, the last 5 has a last body 51, and a holder 52 is disposed on top of the last body 51, the holder 52 has two spaced-apart held portions 521, and the held portions 521 are elongated concave grooves. The shoe making machine comprises a machine body unit 4 and a last clamping device 100. The body unit 4 includes a support 41, a forming mold 42 disposed on the support 41, and a top seat 43 disposed on the support 41 and located at the forming mold 42, wherein the top seat 43 can move up and down along a top-bottom direction Z and is used for mounting and fixing the last clamping device 100. To operate the body unit 4 to combine the shoe material with a shoe sole (not shown), the shoe sole coated with adhesive is first placed on the forming mold 42, the shoe material is put on the last 5, then the last 5 is installed on the last clamping device 100, and the top seat 43 is controlled to drive the last 5 to move downward to press on the forming mold 42, so that the shoe material and the shoe sole are mutually extruded and combined to form.

The last clamping device 100 includes a base unit 1, a driving unit 2, and a clamping unit 3.

The base unit 1 is disposed on a top base 43 of the body unit 4, and includes a base wall 11 locked to the top base 43 by a plurality of screws and nuts, and a shaft seat 12 extending from the base wall 11 toward a bottom side along the top-bottom direction Z. The base wall 11 has a receiving groove 111 penetrating the top and bottom and extending backward along the front-back direction X, and the rear side of the receiving groove 111 is open.

Referring to fig. 2 to 4, the shaft seat 12 has a fixing portion 121 disposed at a bottom side of the base wall 11, and a shaft end portion 122 opposite to the fixing portion 121 in the top-bottom direction Z, the fixing portion 121 of the shaft seat 12 is locked to the base wall 11 by four screws, and the shaft end portion 122 has two grooves 123 disposed at intervals and extending along the left-right direction Y, and two pivot holes 124 disposed at intervals and extending along the front-back direction X.

The driving unit 2 is disposed on the base wall 11 of the base unit 1, and includes a pressure cylinder 21 located in the accommodating groove 111 and having two valve holes 211, a piston rod 22 telescopically disposed in the pressure cylinder 21 along the front-back direction X, and a pushing member 23 disposed at one end of the piston rod 22.

Referring to fig. 4 to 6, the pushing element 23 is driven by the piston rod 22 to move relative to the base wall 11 along the front-back direction X, the pushing element 23 has two pushing portions 231 spaced apart from each other along the left-right direction Y, and a notch 232 formed between the pushing portions 231 and through which the shaft seat 12 passes, and preferably, each pushing portion 231 has a first pushing surface 233 extending from front to back and a second pushing surface 234 extending from the first pushing surface 233 to back.

The fixing portion 121 of the shaft seat 12 penetrates the notch 232, the width of the fixing portion 121 of the shaft seat 12 in the left-right direction Y is equal to the width of the notch 232 in the left-right direction Y, no gap exists, and the pushing portion 231 of the pushing member 23 is in sliding contact with the fixing portion 121. The driving unit 2 in this embodiment uses a pneumatic cylinder as a power source, and the piston rod 22 can be controlled to move along the front-back direction X to extend or shorten by selectively injecting compressed air into the pneumatic cylinder 21 through the valve hole 211, the structure of the driving unit 2 is simple, and has an advantage of easy control, in other variations of this embodiment, the driving unit 2 may also use an oil hydraulic cylinder or other forms of power sources, such as a combination of a stepping motor or a servo motor and a screw, and the like, and the limitation is not proper.

The clamping unit 3 is movably disposed on the base unit 1, and includes two clamping members 31 disposed at an interval along the left-right direction Y and respectively corresponding to the pushing portions 231 of the pushing member 23, two elastic members 32 disposed between the clamping members 31 and the shaft seat 12, and two shaft rods 33 pivotally connected to the clamping members 31 and the shaft ends 122 of the shaft seat 12.

Each of the clamping members 31 has a body portion 34, and two pivoting portions 35 spaced apart from the body portion 34 and pivoted to the pivot holes 124 of the respective axle seats 12 through the axle rods 33. Each of the body portions 34 has a force-bearing end 341 abutting against the abutting member 23, a clamping end 342 opposite to the force-bearing end 341, and an installation hole 343 located between the force-bearing end 341 and the clamping end 342. The force-bearing end 341 clamps the pushing-against portion 231 on the left and right sides of the fixing portion 121 of the shaft seat 12, so that the pushing-against portion 231 extends into and pushes against the force-bearing end 341 and the fixing portion 121 of the shaft seat 12. Each of the force-bearing ends 341 has a first inclined surface 344 extending from back to front and tapering from outside to inside, and a second inclined surface 345 extending from the respective first inclined surface 344 to front and tapering, wherein each of the first inclined surfaces 344 is shaped to match with the first abutting surface 233 of the respective abutting portion 231, and each of the second inclined surfaces 345 is shaped to match with the second abutting surface 234 of the respective abutting portion 231. Preferably, each of the clamping ends 342 has a circular bar shape and a protrusion 346 with a shape matching with the clamped portion 521, but in some variations, the protrusion 346 may be omitted from each of the clamping ends 342.

The elastic members 32 are respectively disposed between the mounting holes 343 of the clamping members 31 and the grooves 123 of the shaft seat 12, and each of the elastic members 32 constantly pushes the respective clamping end 342 away from the shaft end 122 of the shaft seat 12, thereby enabling the clamping members 31 to automatically return. In the present embodiment, the elastic element 32 is a helical compression spring, and in other variations of the present embodiment, the elastic element 32 may also be a bent elastic sheet respectively connected between the shaft end 122 and the clamping element 31, which is not suitable for the purpose.

Referring to fig. 6 and 7, the pushing element 23 of the driving unit 2 moves along the front-back direction X, so that the clamping element 31 can move between a releasing state (see fig. 7) and a clamping state (see fig. 6) relative to the base unit 1.

Referring to fig. 7 and 8, when the clamping member 31 is in the release state, the first abutting surfaces 233 of the abutting member 23 abut against the first inclined surfaces 344 of the clamping member 31, the force-bearing ends 341 are close to each other and separated by a distance D1, and the clamping member 31 rotates relative to the shaft seat 12 until the clamping ends 342 are separated from each other, where the distance D1 is a vertical distance from one point of one of the force-bearing ends 341 to a corresponding point of the other force-bearing end 341.

Referring to fig. 5 and 6, when the clamping member 31 is in the clamping state, the second pushing surfaces 234 of the pushing members 23 respectively push the second inclined surfaces 345 of the clamping member 31 to separate the force-bearing ends 341 from each other by an interval D2, and the clamping member 31 rotates relative to the base unit 1 until the clamping ends 342 approach each other, the measurement definition of the interval D2 is the same as the interval D1, and D2> D1, and the elastic member 32 can be compressively disposed in one of the grooves 123 and the respective mounting holes 343. Thereby, the convex strips 346 of the holding end 342 can firmly hold the held portion 521 of the last 5, respectively.

Therefore, when a user wants to detach the last 5 from the last clamping device 100, the user operates the driving unit 2 to shorten the piston rod 22 to drive the pushing part 23 to move backwards, so that the clamping part 31 moves to the release state, the clamping ends 342 move away from each other and release the last 5, and the last 5 can be detached from the last clamping device 100. In other variations of this embodiment, the elastic element 32 of the clamping unit 3 can be omitted, and the clamping end 342 can be reversed by manually and lightly pulling the clamping element 31 to detach the last 5.

It should be noted that, when the clamping member 31 is in the release state, the pushing-against member 23 may not contact with the clamping member 31, as long as the pushing-against member 23 can extend into the clamping member 31 when moving forward.

When a user wants to mount the last 5 with the shoe material put on the last clamping device 100, the user can hold the clamping seat 52 of the last 5 and move the last 5 to the clamping part 31, align the clamped part 521 of the last 5 with the clamping end 342 of the clamping part 31, and operate the driving unit 2 to extend the piston rod 22, so as to drive the pushing part 23 to move forward and push the clamping part 31, so that the clamping part 31 moves to the clamping state and can clamp the last 5.

From the above description, the advantages of the present embodiment can be summarized as follows:

when the clamping member 31 is in the release state, the user can remove the last 5 from between the clamping members 31, so as to put the shoe material on the last 5, and it is more convenient to adjust the position of the shoe material on the last 5.

Secondly, the elastic members 32 push the clamping ends 342 away from each other in opposite directions, so that the clamping member 31 can automatically release the last 5, which is convenient for use.

Thirdly, the width of the fixing portion 121 of the shaft seat 12 is equal to that of the notch 232, and there is no gap, so that when the clamping member 31 is in the clamping state, the pushing portion 231 is not deformed inward by the reaction force from the force-bearing end 341, and the clamping force of the clamping end 342 clamping the last 5 can be maintained.

Fourth, by the shape of the second abutting surface 234 being respectively matched with the second inclined surface 345, in the clamping state, the contact area between the abutting portion 231 and the force-bearing end 341 is increased, so as to increase the friction force, further stabilize the state that the abutting portion 231 abuts against the force-bearing end 341, and make the force-bearing end 341 not easily displace relative to the abutting portion 231.

Claims

1. A last clamping device of a shoe making machine is suitable for being installed on a machine body unit and used for clamping a last, and the last is provided with two clamped parts which are arranged at intervals; the method is characterized in that: the last clamping device of the shoe making machine comprises:

a base unit disposed on the body unit;

the driving unit is arranged on the base unit and comprises a pushing part which can move relative to the base unit along the front-back direction; and

the clamping unit comprises two clamping pieces which are arranged at intervals in the left-right direction and are pivoted on the base unit, each clamping piece is provided with a force bearing end adjacent to the pushing-against piece and a clamping end opposite to the force bearing end, the pushing-against pieces of the driving unit move in the front-back direction to enable the clamping pieces to move between a release state and a clamping state relative to the base unit, the force bearing ends are separated by a distance D1 in the release state, the pushing-against pieces push away the force bearing ends to enable the force bearing ends to be separated by a distance D2 in the clamping state, and D2> D1, and the clamping pieces rotate relative to the base unit until the clamping ends are close to each other to clamp the clamped part of the last head.

2. The last clamping device of a shoe making machine according to claim 1, characterized in that: the base unit comprises a base wall for the driving unit to be arranged, a shaft seat extending from the base wall to the bottom side along the top-bottom direction, the shaft seat is used for the clamping piece to be pivoted, the clamping unit further comprises two elastic pieces arranged between the clamping piece and the shaft seat respectively, and the elastic pieces constantly push the clamping end to move in the direction away from the shaft seat.

3. The last clamping device of a shoe making machine according to claim 2, characterized in that: the shaft seat is provided with a fixing part arranged on the base wall and a shaft end part opposite to the fixing part in the top-bottom direction, the shaft end part is provided with two grooves which are arranged at intervals and extend along the left-right direction, each clamping piece is also provided with a mounting hole, and each elastic piece can be arranged in one of the grooves and the respective mounting hole in a compression manner.

4. The last clamping device of a shoe making machine according to claim 3, characterized in that: the shaft seat is characterized in that two pivot holes which are arranged at intervals and extend along the front-back direction are formed in the shaft end part of the shaft seat, each clamping piece comprises a body part and two pivot parts which are arranged at intervals on the body part, the stress end, the clamping end and the mounting hole are formed in the body part, and the pivot parts of each clamping piece can rotate and are connected to the respective pivot holes.

5. The last clamping device of a shoe making machine according to claim 2, characterized in that: the pushing part is provided with two pushing parts which are spaced in the left-right direction and respectively correspond to the clamping parts, and a notch which is formed between the pushing parts and is used for the shaft seat to penetrate through, and each pushing part extends into the space between the respective clamping part and the shaft seat and pushes against the corresponding stress end.

6. The last clamping device of a shoe making machine according to claim 5, wherein: the shaft seat is provided with a fixing part arranged on the base wall, the fixing part of the shaft seat penetrates through the notch, and the pushing part is in sliding contact with the fixing part.

7. The last clamping device of a shoe making machine according to claim 5, wherein: the force bearing end of each clamping piece is provided with a first inclined surface which is used for the respective pushing and abutting part to push and gradually shrinks from outside to inside, each pushing and abutting part of the pushing and abutting piece is provided with a first pushing and abutting surface which is matched with the respective first inclined surface in shape, and when the clamping piece is in the release state, the first pushing and abutting surfaces respectively push and abut against the first inclined surfaces.

8. The last clamping device of a shoe making machine according to claim 7, wherein: each force bearing end is also provided with a second inclined surface which extends forwards from the corresponding first inclined surface in a gradually reducing manner, each pushing and abutting part is also provided with a second pushing and abutting surface which extends backwards from the corresponding first pushing and abutting surface in a gradually expanding manner, and when the clamping piece is in the clamping state, the second inclined surfaces respectively push and abut against the second pushing and abutting surfaces.

9. The last clamping device of a shoe making machine according to claim 8, wherein: the base wall is provided with a containing groove which penetrates through the top bottom and the rear side of the containing groove is open, the driving unit is provided with a pressure cylinder which is positioned in the containing groove and a piston rod which can stretch and is arranged in the pressure cylinder, and one end of the piston rod is provided with the pushing piece.

10. A shoe making machine is suitable for processing shoe materials which are sleeved on a last in a penetrating mode, the last is provided with two clamped parts which are arranged at intervals, and the shoe making machine is characterized in that: the shoe making machine comprises:

the machine body unit comprises a forming die and a top seat positioned above the forming die, and the top seat can move up and down along the top-bottom direction; and

a last clamping device for clamping the last and mounted on and driven by the top seat, the last clamping device comprising:

a base unit disposed on the top base;

the clamping unit is movably arranged on the base unit and comprises two clamping pieces which are arranged at intervals in the left-right direction and pivoted on the base unit, each clamping piece is provided with a force bearing end which is abutted against the abutting piece and a clamping end which is opposite to the force bearing end, the abutting piece of the driving unit moves in the front-back direction to enable the clamping piece to move between a release state and a clamping state relative to the base unit, the force bearing ends are separated by an interval D1 in the release state, the abutting piece pushes away the force bearing ends to enable the force bearing ends to be separated by an interval D2 in the clamping state, the interval D2 is larger than D1, and the clamping pieces rotate relative to the base unit until the clamping ends are close to each other to clamp the clamped part of the shoe last.