JPS649003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shoe last chucking device in a shoe manufacturing process.

Traditionally, shoes have been made of various materials and shapes depending on the purpose of use, but generally, shoes are made of leather, which are often used on a daily basis, chemical shoes made of synthetic leather, and cloth shoes for sports and labor use. .

By the way, when manufacturing these shoes, the upper part and the sole part are made separately, and the sole is sewn onto the bottom of the manufactured upper part or crimped with adhesive to form a single unit. . In addition, in the case of sports shoes, etc., tape is further pasted around the attached sole.
As shown in Fig. 5, the upper part is made of a shoe last 1 made of aluminum alloy or plastic, covered with an upper skin 2 over the entire surface from the instep and both sides to the bottom (this is then molded). (usually called hanging).

Conventionally, the above-mentioned hanging shoe last b is subjected to a molding process of gluing and drying, and then the sole 3 is attached, or the sole is attached and the tape is attached 4, or the process of taping and sole attachment is performed as a series of steps. was. Therefore, in this case, it is necessary to move the hanging shoe last through each step, but conventionally this has been moved manually or, in most cases, by a continuously rotating conveyor.

However, in the case of movement by the conveyor, each process such as gluing, drying, bottoming, and taping is performed sequentially during the movement, so the hanging shoe lasts on the conveyor are taken out from the conveyor at each processing point. After carrying out the prescribed treatment, it is returned to the conveyor and this process is repeated to perform the final bottoming and tape attachment. Therefore, when the hanging shoe lasts are taken out from the conveyor and returned to the conveyor manually, many workers and labor are required, and no improvement in work efficiency can be expected. In other words, in this conventional manual method, for example, it takes 1 time for gluing work.
2 people on the bottom crimping machine, and 2 people on the tape pasting machine.
It required many people and many workers. Therefore, attempts were made to automate the process from the perspective that if the hanging shoe lasts were taken out and returned mechanically, the need for workers to return the shoe lasts to the conveyor could be omitted. Since the contour of the gripper is complicated, the chuck mechanism for reliably gripping the gripper is also complicated, and the operation is also complicated, making it difficult to realize and, in the end, it has to be done manually.

The present invention has a simplified mechanism in which a suspended shoe last is grasped by a chuck claw, and the chuck claw is operated to easily follow the complicated contour shape of the shoe last when grasping the shoe last. , which solves the above-mentioned difficulties of the conventional method by making it easy to operate.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the structure of the present invention shown in the drawings will be described below.

In FIGS. 1 and 2, reference numerals 5 and 5 designate frames on both sides for installing the chucking device a therebetween. Identical parts are designated by the same reference numerals in each drawing.

As shown in the figure, the chucking device a mainly consists of two arms 6, 6 assembled so as to swing in opposite directions. Further, one arm 6 has an upper arm lever 7 and a lower arm lever 8 combined, and the other arm 6 also has an upper arm lever 7 and a lower arm lever 8 combined. Upper arm branch 7
Both have a cylindrical body, and a gear 9 is integrally attached to the side thereof. The upper half of the lower arm rod 8 is inserted into the cylindrical body of the upper arm 7, and the tip thereof is a round bar 8a that slightly protrudes from the cylindrical body, and the lower half is a square rod. 8b. The upper arm segments 7 of both arms 6, 6 are assembled by meshing gears 9 of the same shape and pitch, and each gear 9 is loosely fitted into a fixed shaft 10 mounted on the frame 5, respectively. Also, one arm 6
The upper arm branch 7 extends from the cylindrical body as shown, and the tip of this extension 7a is pivotally connected to a reciprocating drive mechanism attached to the frames 5, 5, for example, a piston rod 12 of an air cylinder 11 shown in the drawings. .

On the other hand, each lower arm segment 8 is connected to the upper arm segment 7.
As shown in the figure, a pin 13 is inserted into the cylindrical body and protrudes from the cylindrical body, and a pin 13 is inserted into the cylindrical body with both ends protruding as shown in the figure, and two pins are attached to the upper end of the upper arm rod 7 in the pin-piercing portion as shown in FIG. The notches 14 are formed equally, and the pin 1
3 is located within this notch 14.
As a result, the lower arm rod 8 is held against the upper arm rod 7 by the pin 13 and the square bar 8b in the lower half, and the upper arm rod 7
It freely turns around the width within a predetermined angular range corresponding to the width of the notch 14. Furthermore, chuck claws 15 of the same shape and size are attached to the lower ends of the square bar portions 8b of each of the lower arm segments 8. As shown in FIG. 4, the chuck pawl 15 is composed of a gripping portion plate 15a and two attachment portions 15b extending in parallel from the opposite surface of the gripping surface 15a'. The chuck claw 15 is attached to the lower arm segment 8 by supporting it with the mounting pin 16 with the lower end of the square bar portion 8b being sandwiched between the two mounting segments 15b, 15b. As a result, both chuck claws 15, 15 of both arms 6, 6 are connected to the first
As shown in the figure, the holding plate 15 is held inside the arms 6, 6.
A, 15a are attached with their gripping surfaces 15a', 15a' facing each other, and pivoted so as to be freely swingable in the vertical direction about mounting pins 16, 16 as support shafts. The swing range of this chuck pawl 15 is the mounting pin 16.
The upper inner edge of the gripping portion plate 15a of the chuck claw 15 is in contact with the square bar portion 8b of the lower arm portion 8, and the inner edge of the square bar portion 8b is in contact with the chuck claw 15 in the opposite direction. It swings vertically within the range where the edge contacts the inner surface of the gripping portion plate 15a. Further, when mounting the chuck pawl 15, it is preferable to position the mounting pin 16 as eccentrically outward as possible with respect to the mounting plate 15b of the chuck pawl 15, as shown in the figure. As a result, both chuck pawls 15 stand still with their lower portions slightly expanded when they are not in operation due to their own weight. This facilitates insertion of the shoe last when gripping and holding the shoe last, which will be described later. Note that the gripping portion plate 15 of this chuck claw 15
a is the gripping surface 15 in order to make the grip stronger.
It is preferable that a′ is made of elastic rubber, etc.
Further, the surface may be left as the rough surface of the rubber plate, but a large number of small protrusions may be formed on the surface to provide even stronger grip.

Next, the operation of this device will be explained.

When the air cylinder 11 is driven to move the piston rod 12 backward as shown by the chain line in FIG. 1, the extension rod 7a connected to the piston rod 12
The arm 6 swings about the mounting shaft 10 of the gear 9 on the upper arm rod 7 as a supporting shaft, and the arm 6 on the other gear 9 side meshed with this gear 9
also swing in opposite directions at the same time. Accordingly, the chuck claws 15, 15 pivotally connected to the lower ends of the square rods 8b, 8b of the lower half of the arm move away from each other, as shown by chain lines in the drawing, thereby widening the spacing between them. Conversely, when the piston rod 12 is moved forward, the first
As shown by the solid line in the figure, the chuck claws at the lower end move in the closing direction and approach each other due to the swinging of both arms 6, 6 in opposite directions due to gear meshing. Both chuck claws 15, 15 are normally left in a released state, and both chuck claws 15, 15 are brought close to each other when grasping a hanging shoe last.

When in use, the chucking device a equipped on the frames 5 is placed at a processing position for gluing, drying, bottoming, taping, etc. during the movement of the hanging shoe last b by the conveyor. in this case,
Each chucking device positions the chuck pawls 15, 15 on the line of movement of the suspended shoe last b, moves the piston rod 12 backward, and leaves both chuck pawls 15, 15 in a released state. The suspended last is placed on the conveyor and moves until it reaches the first gluing position, and the gripped portion of the last is released by the release chuck claws 15,1.
5, the air cylinder 11 is activated and the piston rod 12 moves forward. Along with this, both arms 6, 6 swing in opposite directions due to the meshing of gear 9, so that both chuck claws 15, 15 at the lower ends of the arms move in the closing direction. chuck claw 1
5 is rotatable together with the lower arm rod 8 which is freely rotatable within a predetermined angle range in the axial direction, and is also swingable vertically within a predetermined angle range on the lower arm rod 8. Both chuck claws 1
5 and 15 move in the closing direction and come into contact with both sides of the gripped part of the shoe last, and easily follow the shape of the contact surface to the gripped part by the above-mentioned free turning and swinging. , attached to most of it. At the same time, since the gripping surface 15a' of the chuck pawl 15 is made of an elastic material such as rubber and has a rough surface, both chuck pawls 15, 15 come into almost close contact with both sides of the gripped portion of the shoe last at the same time, and furthermore, in the closing direction. The movement of the shoe presses the shoe and firmly grips the shoe last. When this gripping state is reached, the air cylinder 11 is stopped, and the hanging shoe last b is gripped.
In this state, it is taken out of the conveyor and glued.
When the gluing is completed, the gripped hanging shoes are returned to the conveyor, the air cylinder 11 is activated, and the piston rod 12 is moved back. As a result, both chuck claws 15, 15 operate via both arms 6, 6 in the opposite manner to the previous gripping operation, and are expanded to release the hanging last. Then, the suspended shoe last is moved to the next drying section. Movement of hanging shoe lasts by the above conveyor,
Gripping and releasing by the chucking device is repeated at each processing position, and finally, bottoming and taping are appropriately performed in a predetermined order to complete the work. The timing of the operation of the air cylinder for the continuous movement of the conveyor and the gripping and release of both chuck claws is electrically activated and automatically performed in conjunction with the gripping of the hanging shoe last in order to improve work efficiency. However, in some cases, these operations may be performed manually by turning the switch ON or OFF each time.

As explained above, the present invention includes a cylindrical upper arm branch provided with a gear on the side surface, and substantially the upper half of the arm penetrating into the cylinder of the arm branch, and the upper arm branch is inserted within a predetermined angle range with respect to the upper arm branch. Two arms are attached to the frame so that they swing in opposite directions due to the meshing of their respective gears, and the two arms are made up of a lower arm segment that is mounted so that it can freely rotate around its axis. Since the chuck claw is pivoted to the lower end so that it can swing freely up and down within a predetermined angle range, the opposing chuck claws can be moved in the opening and closing directions in a timely manner by swinging both arms in opposite directions, and can be moved along the axis of the arm. The hanging shoe last can be reliably and easily grasped or released by turning within a predetermined angle range due to free rotation in any direction and simultaneously swinging within a predetermined angle range in the vertical direction. . Moreover, according to the present invention, since both chuck claws can freely rotate and swing, the gripping surfaces can be freely oriented over a wide range within the range of their opposing states, so that shoe lasts with complex contours can be easily oriented. Even if it is a part to be gripped, both chuck claws can easily follow the shape of the part to be gripped, attach to both sides of the part to be gripped, and grip the part reliably and firmly.
Furthermore, the gripping surface is made of an elastic material such as rubber, and
If the surface is roughened, the grip will be even stronger.

The device of the present invention is arranged along a conveyor that continuously transports hanging shoe lasts at a processing position such as gluing, and is operated by adjusting the timing of the gripping and releasing operations of chuck claws and the continuous movement of the conveyor. By doing so, the shoe lasts are automatically gripped and released in each processing device, and less manpower is required to take the shoe lasts out and back onto the conveyor, which greatly reduces labor and improves work efficiency. be.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view showing its assembly and operation procedure, Fig. 2 is a partially omitted side view, and Fig. 3 is a perspective view of the connecting portion of the upper and lower sections of the arm. 4 is a perspective view of the chuck claw, and FIG. 5 is a perspective view of the hanging shoe last. 6...Arm, 7...Upper arm section, 8...
Lower arm branch, 9...gear, 15...chuck claw.

Claims (1)

[Claims] 1. A cylindrical upper arm lever with a gear on the side and almost the upper half inserted into the cylinder of the upper arm lever, and can freely rotate around its axis within a predetermined angular range with respect to the upper arm lever. Attach the two arms to the frame so that they swing in opposite directions due to the meshing of their respective gears, and attach the chuck claws at the lower ends of each lower arm at a predetermined angle. A chucking device for a shoe last used in a shoemaking process, characterized in that the chucking device is pivoted so that it can swing freely up and down within a range.