JPH0141289Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a last for shoe making, in particular, a last main body, a heel part that is slidable with respect to the last main body, and a lock handle that rotates in the locking direction to move the heel part into the last main body. The present invention relates to an unlocking device for a device equipped with a locking device for locking a device.

When the instep is suspended over the last and the heel is locked against the last, the bottom surfaces of the last and the heel align, maintaining the normal length of the last, and this state At the same time, the sole is molded and the upper is integrated with the upper, and when the shoe is taken off, the heel is unlocked and the bottom of the heel protrudes from the bottom of the last body, thereby shortening the length of the last. The shoe is removed from the last of the foot.

In injection molding machines that are currently in common use, multiple lasts are arranged on a rotary table at equal intervals on the circumference, so if an unlocking device is installed for each last, the structure of the last will change. There is a problem that not only is it complicated, but also the manufacturing cost is high.

In view of the above, the present invention configures the unlocking device as an external type and enables each foot last to be unlocked with one unlocking device, thereby simplifying the structure of the last and manufacturing cost thereof. The purpose is to reduce the

To achieve the above object, the present invention includes a last main body, a heel part that is slidable with respect to the last main body, and a lock handle that locks the heel part against the last main body by rotating the lock handle in the locking direction. A shoemaking foot type unlocking device is provided with a locking device for locking the shoe, and an actuation cylinder is disposed near the locking device to apply rotational force in the unlocking direction to the lock handle in the locking position by contraction of a piston rod. An unlocking pin is provided at the distal end of the piston rod and is held in a disengaged state with respect to the lock handle while the piston rod is being extended, and is held in an engaged state with the lock handle after the piston rod is extended. Provided is a shoe-making last unlocking device characterized in that it is provided with a.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In Fig. 1, 1 is a rotary injection shoe making machine, which includes a rotary table 2 that rotates intermittently in a counterclockwise direction, and a rotary table 2 disposed around the table 2. The injection machine 3 for molding shoe soles is provided.

Around the rotary table 2, a foot heel unlocking device 4, which will be described later, is placed close to the injection machine 3.
Adjacent to the unlocking device 4, a teaching play/back type manipulator 5 for automatic shoe removal is provided. 6 is a conveyor for conveying the shoes S removed from the injection shoe making machine 1, and 7 is a program switching device for changing the shoe removal locus of the manipulator 5 depending on the type of shoes S.

As shown in FIGS. 1 and 4, on the rotary table 2 of the injection shoe making machine 1, there is one mold 8 for forming soles.
A plurality of left sole molding units 11 1 and a plurality of right sole molding units 11 1 , 11 2 each have a plurality of left sole molding units 11 1 and a plurality of right sole molding units 11 ₁ , 11 ₂ which are provided with two foot molds 10 provided on a support 9 and which cooperate with these molding soles to mold a shoe sole. They are arranged at equal intervals on the circumference. A truncated cone-shaped rotating head 12 that can be rotated intermittently through 180 degrees and fixed at each position is attached to the tip of each support column 9, and two foot lasts 10 are attached to the outer circumferential surface of the rotating head 12, and their heel portions 10b are attached. are positioned on the outer peripheral edge side of the rotary table 2 and fixed with a phase difference of 180°. As a result, each last 10 can assume a lower horizontal position with its bottom facing downward, and an upper inclined position tilted at approximately 45 degrees with its bottom facing upward.

As shown in FIGS. 2 and 3, the last 10 has a last main body 10a having a hook-shaped notch 13 in the heel portion.
and a heel portion 10b that can slide along the convex arc-shaped longitudinal inner surface of the notch 13 and engage and disengage therewith. A dovetail 14 is provided on the concave arc-shaped sliding surface of the heel portion 10b relative to the last body 10a, and the dovetail 14
is the dovetail groove 1 formed on the longitudinal inner surface of the notch 13
5, thereby ensuring sliding of the heel portion 10b with respect to the last body 10a.

Between the rear part of the last body 10a and the upper part of the heel part 10b, the heel part 10b is held in the engagement position with the notch 13 of the last body 10a, that is, the heel part 10b is locked and the bottom surface of the heel part 10b is inserted. A toggle type locking device 16 is provided for aligning the bottom surface of the last body 10a and maintaining the regular length of the last.

The locking device 16 includes a locking handle 20 having one end of a hooked portion 17 pivotally attached to the upper rear surface of the foot last body 10a by a support shaft 18, and a rod-shaped portion 19 projecting obliquely from the other end of the hooked portion 17. and hook-shaped part 1 at one end.
7, the link 23 has its other end pivotally connected to the heel portion 10b by connecting pins 21 and 22, respectively, and a notch 24 is formed in the link 23 to escape the support shaft 18.

In the above configuration, the lock handle 20 is the second
When the heel portion 10b is in the downward rotation position, that is, the unlocked position, as shown by the chain line in the figure, the heel portion 10b is in the unlocked state, and its bottom surface protrudes from the bottom surface of the last body 10a, shortening the length of the last. . On the other hand, rotate the lock handle 20 in the clockwise direction in FIG.
When held in the locked position, which crosses the straight line XX connecting the support shaft 18 and the axis of the connecting pin 22 on the heel section 10b side, the bottom surface of the heel section 10b coincides with the bottom surface of the last body 10a, and the heel section 10b It is held in a locked state.

The sole molding mold 8 has a split side wall portion 8a that can be moved in the left-right direction and a sole mold portion 8 that can be moved in the vertical direction.
b, and the injection machine 3 is placed on the mating surface of both side mold parts 8a.
A sprue 25 is formed to be connected to. The sprue 25 is formed with a narrow diameter portion 25a on the outlet side,
After forming the sole, the spruce slug solidified within the sprue 25 can be easily removed by pulling.

As shown in FIGS. 4 and 5, the locking device 16
The unlocking device 4 for unlocking the heel portion 10b is equipped with a base 27 having a mounting surface inclined at an upward slope of approximately 45° toward the last 10 located at the top, and a base 27 on which the mounting surface is mounted. A pair of support plates 29
A cylinder main body 31 of a large-sized first air cylinder ₃₀₁ serving as an operating cylinder is provided parallel to the mounting surface. As a result, the first air cylinder 30
₁ is disposed near the locking device 16 of the last 10 located at the top. A base plate 35 is fixed to the tip of the piston rod 32 of the _first air cylinder 301, and has two brackets 33 and 34, one long and one short, protruding parallel to the piston rod 32, and the middle part of the unlock pin 36 is fixed to the tip of the long bracket 33. An end of the arm 37 is pivotally connected via a connecting pin 38. A small second air cylinder 3 is attached to the tip of the short bracket 34.
The end of the cylinder body 39 of _0.02 is pivotally connected via a connecting pin 40, and the tip of the piston rod 41 is pivotally connected to the rear end of the unlocking pin 36 via a connecting pin 42.

The first air cylinder 30 ₁ has the function of applying rotational force in the unlocking direction to the lock handle 20 in the lock position by contraction of the piston rod 32, and the second air cylinder 30 ₂ has the function of applying rotational force in the unlocking direction to the lock handle 20 in the lock position.
While the piston rod 32 of the air cylinder ₃₀₁ is being extended, the unlocking pin 36 is held in a disengaged state with respect to the handle rod portion 19, and the piston rod 32 is
3 has the function of holding the unlocking pin 36 in engagement with the handle bar 19. Reference numeral 43 designates a guide rod for the piston rod 32 of the first air cylinder ₃₀₁ , which is attached to the support portion 4 between the base plates 35.
4. 45 is a reinforcing frame for the guide rod 43, and both members 43, 45 move forward and backward together with the piston rod 32. This reinforcing frame 45 is provided with a cam for confirming the extension limit and contraction limit of the piston rod 32, but this is omitted from the figure.

As shown in FIGS. 6 to 8 and FIG. 10, the shoe removal manipulator 5 has a flexible arm 48 that is swingably suspended from a support 46 via a support shaft 47.
and a hand 50 swingably attached to the lower end of the arm 48 via a support shaft 49. The hand 50 has a base end 51 on the arm 48 side, an intermediate part 52 rotatable about an axis perpendicular to the support shaft 49 with respect to the base end 51, and a support shaft 49 of the arm 48 with respect to the intermediate part 52. It consists of a cylinder body 54 that is swingable around a support shaft 53 parallel to the cylinder body 54, and a pair of first and second fingers 55 ₁ and 55 ₂ that are attached to the cylinder body 54 and can be opened and closed.

The cylinder body 54 has a pair of first and second cylinders parallel to each other.
The first and second cylinder holes 56 ₁ and 56 ₂ have second cylinder holes 56 ₁ and 56 ₂ , respectively.
The pistons 57 ₁ and 57 ₂ are slid together, and the insides of the first and second cylinder holes 56 ₁ and 56 ₂ are the same as the first and second cylinder holes.
Pneumatic chambers 71 ₁ , 7 for opening fingers 55 ₁ , 55 ₂
1 ₂ and closing pneumatic chambers 72 ₁ and 72 ₂ .
These pneumatic chambers 71 ₁ , 71 ₂ , 72 ₁ , 72 ₂ are such that the opening pneumatic chamber 71 ₁ of the first cylinder hole 56 ₁ is the closing pneumatic chamber 72 2 of the second cylinder hole 56 ₂ , and the closing pneumatic chamber 72 ₂ of the second cylinder hole 56 2 . 1
The closing pneumatic chamber 72 ₁ of the cylinder hole 56 ₁ is arranged adjacent to the opening pneumatic chamber 71 ₂ of the second cylinder 56 ₂ . A first piston rod 58 ₁ is fixed to the end face of the first piston 57 ₁ facing the closing pneumatic chamber 72 ₁ .
The proximal end of the first finger 55 ₁ is connected to the protruding end of the first finger 8 ₁ from the first cylinder hole 56 ₁ . The end face facing the opening pneumatic chamber 71 ₁ of the first piston 57 ₁ has a first
A guide rod 59 ₁ is fixedly installed, and the protruding portion of the first guide rod 59 ₁ from the first cylinder hole 56 ₁ is slidably engaged with the base end of the second finger 55 ₂ . A second piston rod 58 ₂ is fixed to the end face facing the closing pneumatic chamber 72 ₂ of the second piston 57 2 , and the second cylinder _{56 2 of} the second piston rod 58 ₂
The intermediate portion of the second finger 552 is connected to the protruding end of the second finger ₅₅₂ . Pneumatic chamber 7 for opening of second piston 57 ₂
A second guide rod 59 ₂ is fixed to the end face facing 1 ₂ , and the protruding portion of the second guide rod 59 ₂ from the second cylinder hole 56 ₂ is slidably engaged with the intermediate portion of the first finger 55 ₁ . There is.

The first and second fingers 55 ₁ and 55 ₂ have stepped blocks 60 for shoe clamping made of sponge rubber that face each other on the inner surfaces of their tips, and the heel is placed between the inner surfaces of the thin portions 60a of both blocks 60. The side surface of the sole of the shoe and the side surface of the upper skin of the heel are sandwiched between the inner surface of the thick portion 60b. A pressure plate 61 made of sponge rubber is provided on the upper surface of the thin wall portion 60a of both blocks 60.
is attached with one end protruding inward. This press plate 61 presses the heel tread when the shoe is large, thereby preventing the toe side from going down and the shoe falling from between the blocks 60.
Not necessary if the shoes are small.

FIG. 9 shows a pneumatic circuit for opening and closing the first and second fingers 55 ₁ and 55 ₂ , in which a pneumatic unit 66 consisting of a filter 63, a pressure reducing valve 64 and an oiler 65 is connected to the pneumatic source 62. A high pressure setting pressure reducing valve 69 and a low pressure setting pressure reducing valve 70 are connected in parallel between the unit 66 and the switching valve 67. The on-off valves 68 of the first and second fingers 55 ₁ and 55 ₂ are connected to a switching valve 67 . The on-off valve 68 is connected to the opening pneumatic chambers 71 _{1 ,} 71 ₂ and the closing pneumatic chambers 72 ₁ , 72 ₂ of the first and second cylinder holes 56 ₁ , 56 ₂ of the cylinder body 54 through an X-shaped pipe 73 . connected.

Next, the shoe manufacturing and shoe removal processes using each of the above-mentioned devices will be explained.

First, as shown in FIGS. 1 to 3, for example, the right bottom molding unit 11 ₂ is located on the front side of the injection machine 3.
The upper and lower shoe uppers U are suspended between the upper and lower lasts 10, and the heel portion 10b of the last 10 is locked by the locking device 16, and the heel portion 10b is inserted into the notch 13 of the last main body 10a.
The foot last 10 is held at the normal last length.
The foot mold 10 located at the bottom is positioned above the bottom mold part 8b of the mold 8 to close the both mold parts 8a, and the rotary table 2 is intermittently rotated counterclockwise in FIG. 1 to remove the mold 8.
2. Match the sprue 25 with the injection nozzle of the injection machine 3. Then, from the injection machine 3, the molten bottom material such as synthetic resin or synthetic rubber is passed through the sprue 25 to the mold parts 8 on both sides.
a. The cavity formed by the sole part 8b and the last 10 is filled to form the sole So, and at the same time the sole So and the upper U are integrated to manufacture the shoe S.

Next, both side mold parts 8a are opened, and the bottom mold part 8b is lowered to release the mold, and the foot last 10 covering the shoe S is rotated 180 degrees upward, and the other foot last 10 located above is rotated.
is positioned above the bottom mold part 8b of the mold 8, and the shoes S are manufactured by the same operations as described above. Then, the spruce lugs hanging down from the heel of each shoe S are sequentially removed by a spruce lag cutting device (not shown).

Thereafter, the rotary table 2 is intermittently rotated counterclockwise in FIG. 1 to stop the pair of lasts 10 covering the shoes S at the position of the unlocking device 4. Then, as shown by the chain line in FIG. 4, the first air cylinder ₃₀₁ of the unlocking device 4 is operated in the forward direction to extend the piston rod 32. At this time, the piston rod 41 of the second air cylinder ₃₀₂ is in a contracted state,
Therefore, the unlocking pin 36 is tilted and held in a non-engaging state with respect to the handle bar portion 19. Next, the second air cylinder ₃₀₂ is actuated in the forward direction to extend the piston rod 41, and the unlock pin 36 is raised substantially perpendicular to the axial direction of the first air cylinder ₃₀₁ to engage with the handle bar portion 19. Thereafter, as shown in FIG. 5, the first air cylinder ₃₀₁ is operated in the backward direction to contract the piston rod 32. As a result, the handle 20 is rotated clockwise by the traction force of the unlocking pin 36, and the locked state of the heel portion 10b of the last 10 is released, and the bottom surface of the heel portion 10b protrudes from the bottom surface of the last main body 10a, thereby connecting the last main body 10a and the shoe. The close contact with the inner surface of the sole is released and the length of the foot is shortened.
A similar unlocking operation is performed for the other lock device 16 as well.

Next, the rotary table 2 is rotated counterclockwise in FIG. 1 to stop the last 10 at the position of the manipulator 5.

Before the shoe removal operation, as shown in FIGS. 10 and 11, the hand 50 of the manipulator 5 horizontalizes the first and second fingers 55 ₁ and 55 ₂ and opens them to return to the original position a near the conveyor 6. It is in.

When taking off your shoes, move arm 4 according to the program.
8 swings and bends toward the last 10 located at the top, and the cylinder portion 54 rotates around the support shaft 53, causing the first and second fingers 55 ₁ , 55 ₂ to touch the tread surface of the sole So. It is held at approximately 45° which matches the inclination,
Both fingers 55 ₁ at position c via position b,
55 ₂ are located on both sides of the heel of shoe S. When taking off your shoes,
The switching valve 67 in FIG. 9 is switched to the high pressure setting pressure reducing valve 69 side, and the closing pneumatic chamber 7
Since high pressure air is introduced into 2 ₁ and 72 ₂ , the first,
The second fingers 55 ₁ and 55 ₂ are closed and the heel of the shoe S is clamped.

Next, the first and second fingers 55 ₁ and 55 ₂
They move from position c to position d so as to draw a trajectory approximately along the sliding surface of heel portion 10b and last body 10a. During this time, the heel portion 10b of the last 10 slides against the last main body 10a as the first and second fingers 55 ₁ and 55 ₂ move to become unlocked, and the length of the last is further shortened. A gap is created between the toe portion of the last body 10a and the toe portion of the shoe S, as shown in FIG. 12a, thereby facilitating the subsequent heel release operation of the shoe S.

Then, while the first and second fingers 55 ₁ and 55 ₂ rise diagonally backward from position d to position e, the 13th finger
a. As clearly shown in FIG. 13b, the first and second fingers 55 ₁ and 55 ₂ come off from the heel part 10b of the last 10 together with the heel of the shoe S, but before they come off, the switching valve 67 is set to a low pressure. Switching to the pressure reducing valve 70 side, the air pressure in the closing pneumatic chambers 72 ₁ , 72 ₂ is reduced, and the clamping pressure of the first and second fingers 55 ₁ , 55 ₂ against the heel of the shoe S is reduced. As a result, the first and second fingers 5
To avoid the problem that when the 5 ₁ , 55 ₂ comes off from the heel part 10 b of the last 10, the uncured sole So immediately after molding is strongly pressed by the first and second fingers 55 ₁ , 55 _{2 and} deformed. be able to.

While the first and second fingers 55 ₁ , 55 ₂ rise obliquely backward from position e to position f, the heel of the shoe S completely moves beyond the heel part 10 b of the last 10 as shown in FIGS. 14 a and 14 b. to leave.

Thereafter, the first and second fingers 55 ₁ , 55 ₂ advance obliquely upward approximately parallel to the bottom surface of the last 10 to position g.
At this point, the toe of the shoe S comes out of the toe of the last body 10a, and the shoe S is completely separated from the last 10. Next, after the first and second fingers 55 ₁ and 55 ₂ rise from the position g to the position h, the first and second fingers 55 ₁ and 55 ₂ move back to the position i above the conveyor 6.
The shoe S is placed on the conveyor 6 when the shoe sole So is turned downward by 180 degrees and the first and second fingers 55 ₁ and 55 ₂ are lowered to position j. Then, the on-off valve 68 is switched and the closing pneumatic chambers 72 ₁ , 72 ₂ are opened to the atmosphere, and at the same time the opening pneumatic chambers 71 1 , 72 ₂ are opened to the atmosphere.
Pressure air is introduced into 71 ₂ , so the first and second
The fingers 55 ₁ and 55 ₂ are opened and the shoes S are left on the conveyor 6.

Next, while the first and second fingers 55 ₁ and 55 ₂ advance diagonally upward from position j to position k, both fingers 55 ₁ and 55 ₂ rotate by 180° to return them to their original state. and the first and second fingers 55 ₁ ,
55 ₂ descends diagonally backward, retreats, and returns to the original position a.

After the above shoe removal operations are completed, the footprint after shoe removal is 10.
The shoes are rotated 180 degrees to position the unshoeed last 10 upward, and the same shoe-off operation as described above is performed.

As described above, according to the present invention, since the unlocking device is configured as an external type, it is possible to unlock each last with one unlocking device, which simplifies the structure of the last and reduces manufacturing costs. It is possible to reduce the

[Brief explanation of the drawing]

The drawings show a shoe-making and shoe-removal device to which the present invention is applied, in which Fig. 1 is a schematic plan view of the whole, Fig. 2 is a side view showing the relationship between the last and the mold, and Fig. 3 is a second
Fig. 4 is a side view showing the relationship between the unlocking device and the foot shape, Fig. 5 is a partially enlarged view of Fig. 4,
6 is a partial perspective view of the manipulator, FIG. 7 is a sectional view taken along the line of FIG. 6, and FIG. 8 is a view taken along the arrow in FIG.
Figure 9 is a pneumatic circuit diagram for opening and closing fingers, Figures 10 and 11 are explanatory diagrams of the shoe removal process, Figures 12a, 13a,
Fig. 14a is an explanatory diagram of a part of the shoe-removal process, respectively;
Figures 12b, 13b, and 14b are the first
Figure 2a line XIIb-XIIb, Figure 13a Xb-Xb
FIG. 14a is a sectional view taken along the line XIVb-XIVb. 4... Unlock device, 10... Footprint, 10a
... Foot last body, 10b ... Heel part, 16 ... Lock device, 20 ... Lock handle, 30 ₁ ... First
Air cylinder (operating cylinder), 30 ₂ ... Second air cylinder, 32 ... Piston rod, 36 ...
Unlock pin.

Claims (1)

[Scope of utility model registration request] A foot last body 10a, a heel portion 10b that is slidable thereon, and a lock handle 20 that is rotated in the locking direction to lock the heel portion 10b into the foot last body 10.
This is a foot-shaped unlocking device for shoemaking, which is equipped with a locking device 16 that locks against the locking device 16a, and the locking handle 20 is located near the locking device 16 and is in the locked position due to contraction of the piston rod 32.
An actuation cylinder ₃₀₁ is disposed at the tip of the piston rod 32 and is held in a non-engaged state with respect to the lock handle 20 while the piston rod 32 is being extended.
The shoemaking foot last unlocking device is further characterized in that an unlocking pin 36 is provided which is held in engagement with the lock handle 20 after the piston rod 32 is extended.