JP2001334311A - Roll former device and welding machine for drum-making - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll former device and a welding machine for drum- making with the catch bar of which a blank formed into a cylindrical shape is surely catched without causing jamming. SOLUTION: In the roll former device which is provided with a roll former part 4 between the bending rollers 20, 21 of which the sheet-like blank 1 is held and with the bending guide roller 3 of which the blank is preformed and formed into the cylindrical shape and the catch bar 5 which is arranged in an adjacent relation to this roll former part 4 and with which the blank 1 formed into the cylindrical shape with the roll former part 4 is catched and a front end receiving groove part 5a for catching the front edge Z of the cylindrical blank 1 and the rear edge receiving groove part 5b for catching the rear edge K are provided on this catch bar 5, the catch bar 5 is arranged so that the tip of a projection part 52 with which one side of the rear edge receiving groove part 5b is formed is displaced on the carrying-in side of the blank 1 to the center C of the bending roller 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll former apparatus for forming a thin blank material into a tubular shape and a can welding machine, and more particularly to a blank material formed into a tubular shape by a roll former portion. And a can welding machine, which can reliably receive the sheet by a catch bar.

[0002]

2. Description of the Related Art In a can welding machine, a thin blank material cut to a predetermined size is supplied one by one, formed into a tubular shape by a bending roller, and then welded by a welding roller. There is. In supplying the blank formed into a cylindrical shape by the bending roller to the welding roller, there is a type provided with a catch bar for receiving the blank formed into a cylindrical shape after the forming.

An example of this will be described with reference to FIG. 5. In FIG. 5, reference numeral 1 denotes a thin blank material to be transported, and the blank material 1 is transported while being sandwiched between bending rollers 2 and 2. ing. A bending guide roller 3 for bending the blank 1 in an arc shape is disposed on the unloading side of the bending rollers 2 and 2. The blank 1 to which the bending is performed by the bending guide roller 3 is formed into a cylindrical shape so as to surround the lower bending roller 2. The bending rollers 2 and 2
Roller unit 4 with bending guide roller 3
Is configured.

Below the lower bending roller 2, there is provided a catch bar 5 which comes into contact with the bending roller 2 and receives the blank material 1 formed into a cylindrical shape by the bending rollers 2, 2 and the bending guide roller 3. Is provided. The catch bar 5 and the roll former unit 4 constitute a roll former device.
The catch bar 5 is provided with a front end receiving groove 5a for receiving the front edge Z of the tubular blank 1 and a rear end receiving groove 5b for receiving the rear edge K.

Therefore, the blank 1 formed into a tubular shape by the bending rollers 2 and 2 and the bending guide roller 3 has the front edge Z received by the front end receiving groove 5a of the catch bar 5 and the rear edge K caught. The bar 5 is received by the rear end receiving groove 5b, and is delivered while being locked to the catch bar 5 by its elastic force. Then, it is supplied to a welding roller at the next stage through a transport mechanism (not shown), and the front edge Z and the rear edge K of the cylindrical blank 1 are formed.
Are joined in a wrapped state, for example. The roll former device, the conveying device, and the welding roller constitute a can making machine.

[0006]

The quality of the blank material 1 when it is formed into a tubular shape depends largely on the thickness and hardness of the plate material. Therefore, usually, it is necessary to make adjustments so that each lot can be molded into an ideal shape. In order to perform this adjustment, for example, the insertion depth of the bending guide roller 3 into the bending roller 2 is changed to change the degree of curling, thereby adjusting the diameter of the blank material 1 to be formed into a cylindrical shape, and adjusting each bending. Various methods such as adjusting the arrangement position of the roller 2 are employed.

However, during the molding of a certain lot as described above, different types of blank materials 1
May need to be molded. As described above, there is a problem that if the blank materials 1 of different types are molded during the processing of a certain lot, the positions of the bending rollers 2 and 2 and the bending guide rollers 3 which have been set must be changed. As described above, if the settings of the rollers and the like are changed during the processing of the lot,
When the processing of the lot is restarted, there is a problem that a deviation from the processing dimension before the interruption occurs and the product quality cannot be made uniform.

On the other hand, if the adjustment of each roller is made as small as possible, the rear end edge K of the cylindrical blank material 1 transferred to the catch bar 5 will not fit in the rear end receiving groove 5b of the catch bar 5. It may be caught between the catch bar 5 and the lower bending roller 2 (see FIG. 5).
In this case, there is a problem that, when the blank material 1 is conveyed in this state, the blank material 1 is not fixed at a predetermined position because the molding of the blank material 1 is not constant (jamming). .

In view of the above, the present invention provides a roll former device and a can-making welding machine which can reliably receive a blank formed into a tubular shape regardless of the type of the blank by a catch bar without causing jamming. Things.

[0010]

According to a first aspect of the present invention, a thin blank material to be conveyed is sandwiched between bending rollers and is bent by a bending guide roller. And a roll former section formed into a cylindrical shape so as to surround one of the bending rollers, and is disposed adjacent to the roll former section,
A catch bar for receiving a blank material formed into a cylindrical shape by the roll former portion; a front end receiving groove portion for receiving a front edge of the cylindrical blank material; and a rear end receiving groove portion for receiving a rear edge of the cylindrical blank material. In the roll former device provided with, the end of the receiving portion on the one bending roller side of the pair of receiving portions forming the rear end receiving groove is formed of a blank material with respect to the center of the bending roller. The catch bar is arranged so as to be displaced to the loading side.

With this configuration, for example, when molding is performed on a lot basis, blanks having different types of materials, plate thicknesses, hardnesses, and the like must be molded. Even if the diameter of the blank material formed into a cylindrical shape fluctuates, the rear end edge of the blank material is formed at the end of one receiving portion forming the rear end receiving groove portion of the catch bar and the bending roller adjacent to the catch bar. Can be received in the rear end receiving groove of the catch bar so as to jump over the abutting portion.

The invention described in claim 2 is characterized in that the end of the receiving portion on the one bending roller side is in contact with the peripheral surface of the bending roller. With this configuration, it is possible to prevent the rear edge of the blank material formed into a cylindrical shape from interfering with the end of the receiving portion on the bending roller side that forms the rear end receiving groove of the catch bar. It becomes possible.

[0013] The roll former device according to claim 1 or 2, and a front edge and a rear edge thereof are adjusted to predetermined positions while being conveyed to the blank material and disposed on the unloading side of the roll former device. It is characterized by comprising a transporter section, and a welding roller disposed on the unloading side of the transporter section and welding a front edge and a rear edge of the blank material whose position is adjusted in the transporter section.

With this configuration, it is possible to reliably transfer the blank formed into a cylindrical shape by the roll former device to the catch bar and supply the blank to the welding roller without causing jamming.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings, in which the same reference numerals are given to the same parts as in the above-mentioned prior art. Fig. 1 is an enlarged view near the catch bar, Fig. 2
FIG. 3 is a side view of a roll former device, FIG. 3 is a side view of a can making machine, and FIG. 4 is a front view of a main part of the can making machine.

In FIG. 2, a pair of transport rollers 30 and 3 for nipping and transporting the blank material 1 inserted from the magazine portion are provided on the side of the roll former device where the blank material 1 is loaded.
2 are provided. Upper transport rollers 30, 30
Are biased by a spring S so as to press the blank material 1, and a guide member 32 for holding the blank material 1 from above and below is provided between the transport rollers 30 and between the transport rollers 31. These transport rollers 30, 31
Flexure rollers 33 and 34 are disposed on the carry-out side of the. The flexure rollers 33 and 34 are for making the blank material 1 flexible, and
Has a larger diameter. A pressing roller 35 for pressing the blank 1 against the base member 36 is provided on the unloading side of the flex rollers 33 and 34 before the blank 1 is supplied to a bending roller described later.

A roll former device having a roll former portion 4 and a catch bar 5 is arranged on the carry-out side of the pressing roller 35. The roll former device includes bending rollers 20 and 21 disposed vertically on the carry-out side of the pressing roller 35. The bending rollers 20 and 21 transport the blank material 1 to the next bending guide roller 3 while sandwiching the blank material 1 from above and below. The upper bending roller 20 has a diameter larger than that of the lower bending roller 21. Since the blank 1 is formed into a tubular shape so as to surround the lower bending roller 21, the upper bending roller 20 is formed.
Is shifted from the center of the lower bending roller 21 toward the carry-in side.

The bending rollers 20, 2
A bending guide roller 3 for curving the blank material 1 in an arc shape is supported on the leading end of the bracket 3A on the carry-out side of the bracket 1A. The bracket 3A has a tapered tip, and has an inclined surface 3B directed obliquely downward. By adjusting the insertion depth of the bracket 3A with the bolt 3C provided at the rear end of the bracket 3A, the diameter of the blank material 1 guided into the inclined surface 3B and formed into a cylindrical shape can be changed. . When the insertion depth of the bracket 3A is increased, the blank 1 is formed with a smaller diameter. The bending rollers 20, 2
1 and the bending guide roller 3 constitute a roll former section 4.

Below the lower bending roller 21, the bending rollers 21, 21 and the bending guide roller 3 are brought into contact with the bending roller 21.
And a catch bar 5 for receiving the blank material 1 formed into a cylindrical shape. H is blank material 1
The holding flap which assists this when shape | molding into a cylindrical shape is shown. As shown in FIG. 1, the catch bar 5 includes two members, an upper member 50 on the upper side and a lower member 51 on the lower side. The upper member 50 is disposed on the lower surface of the base member 36, and has a protrusion (receiving portion) 5 that comes into contact with the outer peripheral surface of the lower bending roller 21.
2 is provided. The protrusion 52 has an upper surface 52a and a lower surface 52b that are cut obliquely and have a sharp tip, and the tip is the outer peripheral surface of the lower bending roller 21, and the blank is larger than the center C of the bending roller 21. It comes into contact with a position on the loading side of the material 1 that is shifted by the displacement amount D.
That is, the contact portion (end) T of the projection 52 is set at a position slightly higher than the lowest point P of the lower bending roller 21.

A flat portion 53 extending downward is formed at the bottom of the lower portion of the projection 52.
A groove M is formed at the base of the protrusion 52. Here, the lower surface of the upper member 50 is formed as a guide surface 54 extending obliquely upward from the lower end of the flat portion 53 toward the carry-in side. On the other hand, the lower member 51 includes a flat surface 55 that abuts against the flat portion 53 of the upper member 50, and includes a guide surface 56 that extends obliquely downward from the lower end of the flat surface 55 toward the loading side. I have. In addition, a guide surface (receiving portion) 57 that extends diagonally downward from the upper end of the flat surface gently toward the carry-out side.
Are formed.

When the flat portion 53 of the upper member 50 and the flat surface 55 of the lower member 51 are in contact with each other, the upper member 5
0, the guide surface 57 of the lower member 51 and the groove M
A rear end receiving groove portion 5b for receiving the rear end edge K of the blank material 1 formed in a cylindrical shape is formed in a portion surrounded by a circle and the guide surface 54 of the upper member 50, the flat surface 55 of the lower member 51, and the guide. A front end receiving groove portion 5 for receiving the front end edge Z of the blank material 1 formed into a cylindrical shape in a portion surrounded by the surface 56
a is formed. As described above, the catch bar 5 is divided into two parts, and the wrap length between the flat part 53 of the upper member 50 and the flat surface 55 of the lower member 51 is adjusted, so that the front end receiving groove part 5a and the rear end receiving groove part 5b are formed. Can be increased or decreased, so that it is possible to easily cope with blank materials 1 having different plate thicknesses. The catch bar 5 and the roll former unit 4 constitute a roll former device.

As shown in FIG. 3, a front end Z (not shown) of the blank material 1 held in a state of being formed into a tubular shape by the catch bar 5 is provided on the carry-out side which is the longitudinal direction of the catch bar 5. The transporter unit 37 and the lap gauge 3 which wrap each by adjusting the position with the rear edge K
8 is provided on the unloading side of the lap gauge 38 as shown in FIG.
As shown in FIG. 3, welding rollers 40 and 41 are provided for welding the lap portion between the front edge Z and the rear edge K of the blank 1 whose position is adjusted in the transporter section 37 and the like. The roll former device and the transporter unit 3
7. The lap gauge 38 and the welding rollers 40 and 41 constitute a can-making welding machine.

Next, the operation will be described. The blank material 1 supplied from the magazine portion on the carry-in side of the roll former device shown in FIG. 2 is transported between the guide members 32 while being sandwiched by the transport rollers 30 and 31, and further, the other transport roller 30. , 31 while passing between the flexure rollers 33, 34 to be softened. And
The sheet is supplied to the bending rollers 20 and 21 while being pressed by the base member 36 by the pressing roller 35.

The blank material 1 supplied to the bending rollers 20 and 21 is conveyed from the bending rollers 20 and 21 to the bending guide roller 3, where the blank material 1 is scooped up by the inclined surface 3B of the bracket 3A, and is knitted. It is molded into a shape. Tubular blank material 1
Are guided by the holding flap H, and the front edge Z thereof is guided by the guide surface 56 of the lower member 51 of the catch bar 5 and the guide surface 5 of the upper member 50 of the catch bar 5.
4 and is received by the front end receiving groove 5a of the catch bar 5 and the rear end edge K of the blank 1 is separated from the bending rollers 20 and 21 at the same time as the blank 1
Moves along the outer periphery of the lower bending roller 21, separates from the lower bending roller 21 at the lowest point P, and moves between the lower bending roller 21 and the upper member 50 of the catch bar 5. Jump over the contact portion T with the tip of the projection 52, for example, the lower surface 52b of the projection 52
To the groove M, and is received by the rear end receiving groove 5b.

At this time, the lower bending roller 21 and the projection 5 of the upper member 50 of the catch bar 5 are formed.
2 the contact portion T with the tip is the lower bending roller 2
1 is shifted to the carry-in side from the center C of the blank material 1 and is set at a position slightly higher than the lowermost point P. At the point away from the lower point P, it is possible to reliably jump over the contact portion T and move to the rear end receiving groove portion 5b without being caught by the contact portion T. As a result, it is possible to prevent jamming from occurring.

The cylindrical blank 1 whose front edge Z is received by the front end receiving groove 5a of the catch bar 5 and whose rear edge K is received by the rear end receiving groove 5b of the catch bar 5 has its own elastic force. As a result, the front end receiving groove 5a and the rear end receiving groove 5b are locked and held. Next, as shown in FIG. 3, the cylindrical blank 1 held by the catch bar 5 is conveyed by the transporter 37 and the lap gauge 38 in the direction of the arrow in FIG. The position is gradually adjusted so that the front edge Z wraps by a predetermined width, and is welded between the welding rollers 40 and 41 as shown in FIG.

According to the above-described embodiment, for example, when molding is performed in lot units, it is necessary to mold blank materials 1 having different material types, plate thicknesses, hardness, and the like. And the bending roller 20,
Even if the diameter of the blank material 1 formed into a cylindrical shape by the fluctuating portion 21 is changed, the rear end edge K of the blank material 1 is formed into a projection 52 that forms the rear end receiving groove 5b of the catch bar 5 on the bending roller 21 side. Since the catch bar 5 can be accommodated in the rear end receiving groove 5b so as to jump over the contact portion T with the bending roller 21 adjacent to the catch bar 5, it is possible to reliably transfer the blank material 1 to the catch bar 5. This has the effect of preventing jamming. Therefore, even if the blank material 1 handled is slightly different,
There is no need to readjust the insertion depth of each roller, especially the bending guide roller 3, and different types of blank materials 1 can be used.
Can be mixed to produce a versatile production line.

That is, at the lowermost point P of the lower bending roller 21, the rear edge K of the blank 1 is smoothly separated from the bending roller 21, and the rear edge K is not caught by the contact portion T. , It is possible to prevent the trailing edge K from entering the contact portion T. Therefore, jamming can be reliably prevented, and the blank material 1 formed into a cylindrical shape by the roll former device is reliably transferred to the catch bar 5, and the welding rollers 40, 4 are prevented from jamming.
1 can be supplied. As a result, the blank material 1 formed into a cylindrical shape by the roll former device as described above can be reliably transferred to the catch bar 5 and supplied to the welding rollers 40 and 41 without causing jamming. There is an effect that the yield is good and the production efficiency as a can making machine can be improved.

[0029]

As described above, according to the first aspect of the present invention, for example, when molding is performed in lot units, the type of material, plate thickness, hardness, etc. are unavoidably different. Even if the diameter of the blank material formed into a cylindrical shape fluctuates due to this, the rear edge of the blank material is formed into one receiving portion that forms the catch bar rear end receiving groove. Can be stored in the rear end receiving groove of the catch bar so as to jump over the contact part between the end of the catch bar and the bending roller adjacent to the catch bar. There is an effect that can be prevented.
Therefore, even if the blank materials to be handled are slightly different, it is not necessary to largely re-adjust each roller, and there is an effect that a versatile production line capable of mixing different types of blank materials can be obtained.

According to the second aspect of the present invention, the rear end edge of the blank formed in a cylindrical shape interferes with the end of the receiving portion on the bending roller side forming the rear end receiving groove of the catch bar. Therefore, jamming can be prevented more reliably.

According to the third aspect of the invention, it is possible to reliably transfer the blank formed into a cylindrical shape by the roll former device to the catch bar and supply the blank material to the welding roller without causing jamming. Therefore, there is an effect that the yield is good and the production efficiency as a can-manufacturing welding machine can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of an embodiment of the present invention.

FIG. 2 is a side view of the roll former device according to the embodiment of the present invention.

FIG. 3 is a side view of a can welding machine according to an embodiment of the present invention.

FIG. 4 is a front view of a main part of the can-making welding machine according to the embodiment of the present invention.

FIG. 5 is a side view corresponding to FIG. 1 of the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blank material 3 Bending guide roller 4 Roll former part 5 Catch bar 5a Front end receiving groove part 5b Rear end receiving groove part 20 Upper bending roller 21 Lower bending roller 37 Transporter part 40, 41 Welding roller 52 Projecting part (receiving part) 57 Information surface (accepting section)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B23K 11/08 510 B23K 11/08 510

Claims (3)

[Claims] 1. A roll former section for clamping a thin blank material to be conveyed between bending rollers, forming a curl with a bending guide roller, and forming a cylindrical shape so as to surround one of the bending rollers, A catch bar is disposed adjacent to the roll former portion and receives a blank formed in a cylindrical shape by the roll former portion.The catch bar has a front end receiving groove for receiving a front edge of the cylindrical blank material, In a roll former device provided with a rear end receiving groove for receiving a rear end edge, an end of the receiving part on the one bending roller side of the pair of receiving parts forming the rear end receiving groove is formed by the bending. A catch bar is disposed so as to be displaced toward the blank material loading side with respect to the center of the roller. Tool. 2. The roll former device according to claim 1, wherein an end of the receiving portion on the one bending roller side is in contact with a peripheral surface of the bending roller. 3. The roll former device according to claim 1 or 2, and a front edge and a rear edge thereof which are arranged on a carry-out side of the roll former device and which convey the blank material are positioned at predetermined positions. Transporter section to adjust to
A can welding machine, comprising: a welding roller disposed on the carry-out side of the transporter unit and welding a front edge and a rear edge of the blank material whose position is adjusted in the transporter unit.