JPS6329619B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for forming curls, beads, and flanges on a cylindrical material that is to become the can body of a square can, and its purpose is to continuously form can body materials. Curls and beading on the top and bottom edges,
It is an object of the present invention to provide a device with good workability that can form flanges etc. with high efficiency.

In general, the can body of a can whose top surface is covered with a shallow lid made by press processing etc. is made by forming a band-like or rectangular metal plate in advance into a cylindrical shape with both ends continuous, as shown in Figure 1. The upper edge of material a is rolled inward to form a curled part b, the beading c surrounding the circumference below this curled part, and the lower edge bent outward to form a flange part d. The flange portion d is then seamed together with the periphery of a separately made bottom plate member to complete the can body.

In the case of round cans, this can body member can be made by rolling a single flat plate with curled parts, beading, and flange parts into a cylinder by rolling, but in the case of square cans, it can be made by first forming a square cylinder. Although it is possible to form the curl part and the beading in one process, it is impossible to form the flange part at the same time, and these parts are usually formed separately by hand. Ta. That is, as shown in Fig. 2A, a cylindrical material a is placed on a curling and beading forming machine, and the lower lip is fitted between the movable outer mold A and the inner mold B, respectively, and the inner conical ring C is formed. It rises and first presses the outer mold A, then expands the inner mold B radially in all directions via the truncated conical rod D to form beading, and in this state raises the curl form E to curl it. form part. Next, hold this cylindrical material a upside down so that the curled portion formed above is upward, and as shown in FIG. After the ring-shaped body C' is raised and the outer mold A' is pressed against it, the inner mold B' is expanded in all directions via the truncated conical rod N' to form a flange portion.

In this way, one cylindrical material a is made into a can body member in two steps, and the processing is carried out by directly holding the cylindrical material by hand, which is not only inefficient, but also Furthermore, the handling of short can body parts has the disadvantage of being dangerous. For this reason, attempts have been made to automate this process, but the cylindrical material before flanging is easily deformed by pressure from the outside, and the decorative printing surface on the outside is easily damaged. Even if the operation of each processing part is automated,
It was difficult to hold and supply the material smoothly, and sufficient results could not be obtained.

In the present invention, a curling and beading forming machine and a flange forming machine are disposed vertically on one base with their positions shifted back and forth, and the cylindrical material that is continuously fed is placed on the base in the front and back. A conveyance mechanism that holds two pieces at a predetermined interval and moves back and forth is provided, and each cylindrical material is sequentially processed by the two molding machines, thereby eliminating the drawbacks of the conventional method.

An embodiment of the present invention shown in FIGS. 3 to 7 will be described in detail below.

In FIGS. 3 and 4, reference numeral 1 denotes a base, and a support frame 3 is erected at the front end of a box-shaped horizontal frame 2 whose upper surface serves as a cylindrical material transfer surface. The well-known curling and beading forming machine 4 is installed in this horizontal underframe 2 with the material insertion opening facing the top surface of the horizontal underframe 2, and a vertical screw rod 5 is installed on the rear surface of the support frame 3. A well-known flange forming machine 7 is installed in the lifting frame 6, which is supported so that it can be raised and lowered via the Driven intermittently.

A supply conveyor 8 and a transport mechanism 9 are arranged on the horizontal frame 2. Supply conveyor 8 is the fifth
As shown in the figure, it consists of a conveyor 11 with a feed claw, the base end of which is located between the tips of two rubber belts 10, 10 that are provided so as to protrude rearward, and which reaches in front of the curling and beading forming machine 4. A retractable rod 12 is provided in front of the conveyor 11 with a feed claw for feeding the cylindrical materials one by one at a predetermined interval.

As shown in FIG. 6, the carrying mechanism 9 is made up of two flat plates with cutouts adapted to fit the cylindrical material on the inner edges thereof, with a predetermined front-to-back distance maintained between the left and right sides of the conveyor 11 with feed claws, as shown in FIG. A set of front and rear retaining plates 13,
13', 13, 13' are provided, and each of these holding plates is moved toward or away from each other by means of air cylinders 14, 14', 14, 14', and each holding plate is connected to one moving table by an adjusting screw. The entire conveyor 11 with a feed pawl is engaged with a guide rod 15 provided along the conveyor 11, and the crank 16 of a stroke cam mechanism 35 (described later) moves the conveyor back and forth with a stroke equal to the distance between the front and rear holding plates 13, 13'. It's starting to move. Note that the center distance between the front and rear holding plates 13, 13', 13, 13' and the movement stroke of the moving table are determined to match the center distance of the molding machines 7, 4 provided in the front and rear, In addition, the movable table is made so that the left and right front holding plates 13, 13 are located directly below the molding machine 7, and the rear holding plates 13', 13' are located directly above the molding machine 4 when the moving table moves forward. There is.

Further, in order to push the cylindrical material stopped directly above the molding machine 4 via the transport mechanism 9 into the material insertion opening of the molding machine 4, and to take it out after molding, the cylindrical material is directly above the molding machine 4. An insertion/removal mechanism 17 is attached to the position using the elevating frame 6. As is clear from FIGS. 3 and 4, this insertion/removal mechanism 17 is
A horizontal rod 20 with gripping claws 19, 19 vertically provided at both left and right ends to open and close via opening/closing cylinders 18, respectively.
is suspended and attached to the rear surface of the lifting frame 6 via a first cylinder 21 erected in the center and a second cylinder 22 connected to the first cylinder,
A stopper 2 is made of a permanent magnet piece provided at the front and back with gripping claws 19, 19 held at both ends of the horizontal rod 20.
3, 23, 23, 23 and a pair of left and right rolling down plates 2, which are also made of permanent magnet pieces and are connected to the lower end of the second cylinder 22 and are raised and lowered by the second cylinder 22.
It consists of 4,24. In addition, at a position directly below the molding machine 7, a cylindrical material whose lower edge has been processed by the molding machine 4 is placed on the upper surface of the horizontal frame 2 of the base 1, and the upper edge is made of the material of the molding machine 7. A push-up table 25 for pushing into the insertion opening is provided so as to be movable up and down. In addition, in the figure, 26 is a delivery conveyor for the formed can body member, 27 is a motor for lifting and lowering the lifting frame, 2
8 is a handle that also finely adjusts the lifting frame.
Reference numeral 29 is a handle base into which the handle is removed and fitted, and the motor 27 will not start unless the handle 28 is set. Further, 30 is an article mounting table,
It is provided so as to be able to pivot outward via the arm member.

Next, referring to Figs. 3, 4, and 7, the power transmission mechanism of each part will be explained.
4 are driven by motors 31 and 32, respectively.
Separately, a motor 33 reciprocates the carrying mechanism 9 back and forth with a stroke cam mechanism 35 via a speed reducer 34, and a push-up table 2 via a cam mechanism 36.
Move 5 up and down. This rotation further moves the delivery conveyor 26 and the supply conveyor 8, rotates the timing cam 37 provided in the middle, and moves the start switches of each part in contact with the timing cam 37 to drive each power mechanism and insert/remove mechanism. 17 and the retractable rod 12 of the supply conveyor.

Next, the effect will be explained.

The required cylindrical material to be processed is transferred to the supply conveyor 8.
and are supplied one by one at predetermined intervals via the retractable rod 12. When the conveyance mechanism 9 is reached, the rear holding plates 13, 13 protrude from both sides via the air cylinders 14, 14, surround the cylindrical material, move as they are, and come directly above the molding machine 4 at the bottom and stop. , the rear holding plates 13, 13 return to their initial position when the tubular material is released. Here, the insertion/removal mechanism 17
The horizontal rod 20 descends through the first cylinder 21, and the gripping claws 19, 19 at both ends grip the upper edges of the left and right side plates of the cylindrical material with the stoppers 23, 23, 23, 2.
3 and attach it to the second cylinder 2.
2, and the lower edge of the cylindrical material is inserted into the material insertion port of the molding machine 4 under pressure. When the forming machine 4 is operated to form curls and beading, the first and second cylinders 21 and 22 are simultaneously operated to pull the cylindrical material upward and the grippers 19 and 19 are released. Then, the front holding plate 1 that was stopped on both sides of this cylindrical material
3' and 13' protrude from the left and right to surround the cylindrical material whose lower edge has been processed, move as it is, come to the push-up table 25 directly below the upper molding machine 7, and stop, and the cylindrical material After releasing it, it retreats and returns to its original position. Here, the push-up table 25 is raised to push the upper edge of the cylindrical material into the material insertion opening of the molding machine 7, and flanging is performed. When the processing is completed, the push-up table 25 descends with the cylindrical material placed thereon, and the cylindrical material whose upper and lower edges have been processed is placed in front of the front holding plates 13', 13' that carry the next cylindrical material. It is pushed along the edges and placed on the delivery conveyor 26.
While the front holding plates 13', 13' carry out the above-mentioned conveyance, the rear rear plates 13, 13 hold the next cylindrical material being sent at the same pitch between the front and rear holding plates, and move it forward. In this way, machining is performed continuously. The carrying mechanism 9, the insertion/removal mechanism 17, and the molding machines 4, 7 are operated in a series of sequences under program control by the cam mechanism 37. The order of the forming process may be reversed, with the flange forming machine placed below and the curling and beading forming machine placed above.Furthermore, if necessary, flange forming machines may be placed on both the top and bottom. It is also possible to make a can body member with flanges at both ends.

According to the present invention, the curling, beading, and flange forming machines that perform each processing are arranged above and below and in front and back at regular intervals, so that the processing of the cylindrical material is performed in two stages, and the cylindrical material is processed in two stages. A conveying mechanism that securely surrounds and holds the cylindrical material from the left and right sides and positions it precisely above and below the molding machine, and a gripping claw that suctions or grips the upper edge of the cylindrical material located directly above the molding machine during the first stage of descent. Because we have installed an insertion/removal mechanism that holds the material in place and presses it into the molding machine during the second stage of descent, the continuously supplied cylindrical material is reliably and continuously fed at high speed without deformation or damage. Work can be carried out with high efficiency without the risk of being processed and producing defective products.

[Brief explanation of the drawing]

Figure 1 is an explanatory sectional view of the can body member, Figure 2 A and B
3 and 4 are explanatory cross-sectional views of the states in which curling, beading forming, and flange forming are performed, respectively.
The figures are front and side views of the apparatus of the present invention, FIG. 5 is a perspective view of the supply conveyor, FIG. 6 is a perspective view of the conveyance mechanism, and FIG. 7 is an explanatory perspective view of each transmission mechanism. 1... Base, 2... Horizontal underframe, 3... Support frame,
4, 7... Molding machine, 6... Lifting frame, 8... Supply conveyor, 9... Carrying mechanism, 13, 13'... Holding plate, 14, 14'... Cylinder, 17... Insertion/removal mechanism , 18... Opening/closing cylinder, 19... Grip claw,
20...Horizontal rod, 21...1st cylinder, 22...
2nd cylinder, 23...stopper, 24...reducing plate, 25...pushing table.

Claims (1)

[Claims] 1. A supply conveyor for the required cylindrical material and a delivery conveyor in front thereof are provided on the upper surface of the horizontal underframe forming the base, and two molding parts are provided in which the upper and lower edges of the cylindrical material are individually bent. Place one of the machines inside the horizontal underframe with the material insertion port facing upward, and the other side inside the lifting frame supported by the support frame of the base, moving the machine forward and backward with the material insertion port facing downward. Further, on the upper surface of the horizontal underframe, a movable table that is movable back and forth along the horizontal underframe is arranged front and back at intervals equal to the center distance of these molding machines, and cylindrical materials are placed on the inner edge of each. 2 with a notch that should surround the
A carrying mechanism includes a pair of front and rear holding plates that can be moved close to and separated from each other from the left and right, and is located directly above the molding machine installed in the horizontal frame to hold the upper edge of the cylindrical material at both ends. An insertion/removal mechanism is provided in which a horizontal rod having a vertical stopper made of magnetic force and a gripping claw is lowered in stages via two cylinders, and these mechanisms and each molding machine are interlocked with each other. An apparatus for producing can body members for square cans, which is equipped with a device that drives the square can body.