JP3335785B2 - Metal tube manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a metal tube used as a metal body of a vacuum bottle, an electric rice cooker, various containers and the like.

[0002]

2. Description of the Related Art Generally, these metal tubes are formed by forming a metal plate into a cylindrical shape and joining both ends thereof to form a tube.

When joining both ends of a metal plate, one end of the metal plate is folded outward and the other terminal is folded inward, and the two folded portions are engaged and pressed to be crimped. They are joined by a structure called a joint.

[0004] As described above, the work of joining both ends of a metal plate formed into a cylindrical shape requires that the position and size of the folded portion be accurately set, and that the folded portion be accurately engaged. They must be pressed together, and the positioning of the position where the folded portion is formed and the operation of engaging the folded portion are performed manually.

As another method, folded portions are formed at both ends of a flat metal plate, and thereafter, the metal plate is formed into a cylindrical shape, and the folded portions are engaged and spliced to join the pipe with the pipe. It has also been done.

[0006]

However, in the case of manually adjusting the position of the folded portion and the engaging operation, the metal plate formed into a cylindrical shape must be supported by the hand below the high-power press. Therefore, it is not preferable in terms of safety, and improvement has been desired.

A method in which a folded portion is formed on a flat metal plate and then formed into a tubular shape and then spliced together is preferable in terms of safety and easy automation, but on the other hand, the diameter of the metal tube is different. If this is the case, the specifications of the device must be changed accordingly, making it unsuitable for high-mix low-volume production of barrels such as magic bottles.

The present invention has been made in view of the above circumstances, and has a folded portion formed on a cylindrical metal plate.
It is an object of the present invention to provide a device capable of automatically and automatically engaging a pipe by joining the pipes with a simple structure.

[0009]

According to a first aspect of the present invention, there is provided a rail which is disposed substantially horizontally and supports and suspends both ends of a metal plate which is formed in a substantially cylindrical shape. A transfer device for moving the metal plate forward, a folding device for folding both ends of the metal plate positioned and supported by the rail in directions different from each other, and a folding device disposed in front of the folding device, Having a seaming device for engaging and pressing the folded portions at both ends of the metal plate in a supported state,
A support that can be moved from the lower part of the rail is provided at the lower part of the rail, behind the bending apparatus, between the bending apparatus and the seaming apparatus, and in front of the seaming apparatus. is there.

[0010]

Further, the second invention of the present application is directed to a rail which is disposed substantially horizontally, supports both ends of a substantially cylindrical metal plate, and suspends the metal plate. And a folding device for folding both ends of the metal plate positioned and supported by the rail in directions different from each other, and disposed in front of the folding device and protruding from the upper surface of the rail so as to be able to protrude and retract. The projected ridge and the concave groove formed adjacent to the projected ridge are formed, and one end of the metal plate separated by the projected ridge is guided to turn the folded portion of the end into the other. Guide means for engaging the folded portion at the end portion, and a press machine provided above the rail and pressing the engaged folded portion, the folded portion at both ends of the metal plate supported by the rail. Having a seaming device for engaging and pressing each other It is an feature.

In the first or second invention,
At the rear end of the rail, there is provided a forming device comprising a pair of rollers having different hardness, and bending a flat metal plate into a substantially cylindrical shape. A metal plate formed into a substantially cylindrical shape by the forming device is provided. It is preferable that both ends are supported by the rail and hung.

[0013]

[0014]

[0015]

FIG. 1 shows an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a forming apparatus, and as shown in FIG. 2A, the forming apparatus 1 includes two rollers 2 and 3 having different hardnesses. By pinching the flat metal plate 4, the metal plate 4 is bent and formed into a substantially cylindrical shape.

A rail 5 is provided substantially horizontally from the lower portion of the forming device 1 to the front over substantially the entire length of the device. The rail 5 is used to hold a metal plate 4 formed into a cylindrical shape.
Both ends are supported and held in a suspended state.

A main rail 5a which forms a part of the rail 5 is disposed below the molding apparatus 1. The main rail 5a has grooves on both sides as shown in FIG. 2 (a). 6 are formed.

The metal plate 4 formed into a cylindrical shape fits into the groove 6 of the main rail 5a at both ends by the elasticity of maintaining the cylindrical shape.
It is held suspended from a.

The metal plate 4 supplied to the forming apparatus 1 is discharged in a curved shape from between the rollers 2 and 3, and its tip is guided to fit into one groove 6 of the main rail 5a.
When the entire metal plate 4 is discharged from the molding apparatus 1, the other end of the metal plate 4 is inserted into the groove 6 by the other end of the main rail 5a.
To be engaged with the main rail 5a.

A base 7 is provided in front of the main rail 5a at a position lower than the main rail 5a.
Supports 8a, 8 are provided at both ends of the base 7 and a lower part of the center.
b, 8c are provided, and the supports 8a, 8b, 8c
Can be moved to the side from below. The support 8a,
The direction of movement of 8b and 8c is preferably lateral, but may be movable downward.

A folding device 9 and a seaming device 10 are mounted on the base 7, and between the main rail 5a and the folding device 9 and between the folding device 9 and the seaming device 10. Have connection rails 5b, 5d mounted on a base 7, respectively.

The base 7 is suspended from above through the connection rails 5b and 5d and supported. The support tables 8a and 8b are provided at positions below the connection rails 5b and 5d.

The reference numerals 11a, 11b and 11c denote metal plates 4 respectively.
Transfer device, the transfer device 11a, 11b, 11c
Thus, the metal plate 4 of the main rail 5a is bent into the bending device 9 and the metal plate 4 of the bending device 9 is bent into the seaming device 1.
0 and discharges the metal plate 4 of the seaming device 10 forward.

When the metal plate 4 is transferred by the transfer devices 11a, 11b, 11c, as shown in FIGS. 2B and 2D, the support tables 8a, 8b, 8c move sideways. Thus, the metal plate 4 can pass through the positions of the support tables 8a, 8b, 8c.

The connection rail 5b has the same sectional shape as the main rail 5a, and is provided continuously with the main rail 5a.

As shown in FIG. 3A, the folding device 9 has a lower die 12 formed on the upper surface of a rail 5c provided on the base 7, and Is provided with an upper die 13, and the upper die 13 is separated from and connected to the lower die 12 by a press machine 14.

At the center of the upper mold 13, a sliding piece 15 projecting downward is projected, and the sliding piece 15 is slidably fitted into a concave portion 16 formed on the lower mold 12, and the rail 5c is provided. The two ends of the metal plate 4 suspended by the metal plate 4 are separated from each other at a predetermined interval by the sliding pieces 15, and the edges of the metal plate 4 are brought into contact with the sliding pieces 15 by the elasticity of the cylindrical shape of the metal plate 4. Touching and positioned.

Depending on the degree of curvature of the metal plate 4, when the edge is not elastic enough to come close enough and does not contact the sliding piece 15, an appropriate pressing tool 32 as shown in FIG. It is preferable that the edge of the metal plate 4 be pressed in a direction in which the edge contacts the sliding piece 15.

On both sides of the sliding piece 15, there are a lower mold 12 and an upper mold 13, one of which has dies 17a and 17b for turning the end of the metal plate 4 downward, and the other has an upward mold. Molds 18a and 18b for folding are formed respectively.

Then, when the upper die 13 is moved downward by the press machine 14, as shown in FIG.
Between the end of the metal plate 4 and the one mold 17.
a, 17b, one of the terminals is folded downward to form a folded portion 19
a, and the other mold 18a, 18b is folded back at the other end to form a folded portion 19b.

At this time, since the folded portions 19a and 19b are respectively folded by 90 ° or more, the metal plate 4 suspended on the rail 5c swings laterally as shown in FIG. Of the folded portions 19a and 19b can be formed.

When the press machine 14 is moved upward, the metal plate 4 returns to a state of being suspended by the rail 5c,
As shown in (c), folded portions 19a and 19b are formed at both ends of the metal plate 4 formed into a cylindrical shape.

When pressing is performed by the press machine 14, a load is applied to the base 7 via the lower mold 12, and the load is applied to the support tables 8a, 8b, 8c inserted below the base 7.
Supported by

As shown in FIG. 2 (d), the connection rail 5d has a rib 20 projecting from the center of the upper surface thereof, and a concave groove 21 formed on both sides of the rib 20.
0, the metal plate 4 is separated from the metal plate 4 in a state where the folded portion 19a folded inward is fitted in the groove 21.
Is suspended from the connection rail 5d.

When the metal plate 4 passes through the connection rail 5d, the support 8b below the connection rail 5d moves laterally as shown by the solid line in FIG. It is possible to do.

Next, as shown in FIG. 4, the seaming device 10 has a ridge 22 attached to the upper surface of the rail 5e so as to be able to protrude and retract, and the ridge 22 always projects from the upper surface of the rail 5e by a spring means 23. A groove 24 is formed on one side of the ridge 22 on the upper surface of the rail 5e. Reference numeral 25 denotes a press provided above the rail 5e.

In FIG. 4, reference numeral 26 denotes a holding member for holding the left end portion of the metal plate 4 on the rail 5e on the rail, and reference numeral 27 denotes a pushing member for pushing up the metal plate 4 suspended on the rail 5e. Reference numeral 28 denotes a pressing member for biasing the right end portion of the metal plate 4 on the right side in the drawing to the left, and reference numeral 29 denotes an expanding member for pushing the right side of the metal plate 4 in the drawing outward.

While holding the left end portion of the metal plate 4 on the rail 5e by the pressing member 26, the pressing member 2
When the metal plate 4 is pushed upward at 7, the right half of the metal plate 4 is pushed upward as shown in FIG. 5 (a), and the right end in the figure rises from above the rail 5e.

When the pressing member 28 is operated in this state,
As shown in FIG.
2 to the left over the top of 2. If the elasticity for holding the cylindrical shape of the metal plate 4 is sufficiently large, FIG.
FIG. 5 shows only the elasticity of the metal plate 4 from the state of FIG.
Since the state of (b) can be obtained, pressing by the pressing member 28 is not necessarily required.

Next, when the pushing up by the pushing up member 27 is released and the right side portion of the metal plate 4 is pushed outward by the expanding member 29, the folded back folded down as shown in FIG. The portion 19a engages with the folded portion 19b folded upward.

When pressing is performed by the press machine 25 in this state, the ridge 22 moves downward to form a continuous surface with the upper surface of the rail 5e, and the portion where the folded portions 19a and 19b are engaged is recessed into the concave groove 24. It is pressed and crimped between the press machine 25 and the bottom surface of the concave groove 24 to form the seam 30, and the metal pipe 31 joined by the seam 30 is obtained.

In this embodiment, the seam 30 is formed so as to protrude from the inner surface of the metal tube 31.
May be provided on the press side so as to protrude from the outer surface of the metal tube 31.

The main rail 5a, the connection rail 5b,
The rail 5c and the connecting rail 5d of the bending device 9 and the rail 5e of the seaming device 10 form a continuous rail 5, and are transported from the main rail 5a to the rail 5e of the seaming device 10 while the metal plate 4 is suspended. can do.

In the present invention, the forming device 1 is not always necessary, and the metal plate 4 formed into a cylindrical shape in another step can be supported on the rail 5. Also, in the case where the forming device 1 is provided, the forming device 1 is not limited to bend the metal plate 4 into a circular cross section, but may be bent into an arbitrary cylindrical shape such as a square cross section.

Further, the device of the present invention can be provided alone, but a device having another function can be added. For example, a punching device for the metal plate 4 may be further connected to the forming device 1, the flat metal plate 4 may be punched from the plate-shaped metal material by the punching device, and the punching device may be automatically supplied to the forming device 1.

Depending on the application of the metal tube 31, the obtained metal tube 31 may be further processed. For example, when the metal tube 31 is used as a body such as a vacuum bottle, both ends of the metal tube 31 are curled inward. However, the device of the present invention and the device for forming the curl are connected. Alternatively, an integrated device that automatically forms curls on the obtained metal tube 31 may be used.

[0047]

Next, the operation of the apparatus according to the present invention will be described based on the above embodiment.

First, when a flat metal plate 4 is supplied to the molding apparatus 1, the flat metal plate 4 is pressed by the rollers 2 and 3 and bent into a cylindrical shape. At this time, it is preferable to adjust the pressing force of the rollers 2 and 3 so that the metal plate 4 bends so as to have a slightly smaller diameter than the diameter of the metal tube 31 to be manufactured.

The final metal tube 31 does not need to be cylindrical, but may be frustoconical. In this case, if a substantially fan-shaped flat metal plate 4 is used, a metal plate 4 curved into a truncated cone can be obtained.

The metal plate 4 formed into a cylindrical shape by the forming device 1
As described above, both ends of the main rail 5a
And is suspended. At this time, the metal plate 4 is
The main rail 5a is sandwiched by the elasticity of the metal plate 4 itself by being curved so as to have a slightly smaller diameter than the diameter of the metal plate 4, and the suspended state is securely held, so that the main rail 5a is not accidentally dropped.

As in this embodiment, the forming apparatus 1 is incorporated in the apparatus, the flat metal plate 4 is formed into a cylindrical shape by the forming apparatus 1, suspended on the rail 5, and the subsequent steps are performed. However, in the present invention, the forming apparatus 1 is not always essential, and the metal plate 4 formed into a tubular shape in a separate step is supplied to the rear end of the rail 5 and suspended, and the subsequent steps are performed. Can also be offered.

The metal plate 4 suspended on the main rail 5a is moved leftward in FIG. 1 by the transfer device 11a.
The metal plate 4 is transferred to the rail 5c of the bending device 9 while positioning the edge of the metal plate 4. At this time, the supports 8a, 8b, 8c move laterally from the lower part of the base 7 as shown by the solid line in FIG. 2B, and the metal plate 4 can pass through the connection rail 5b.

Next, the supports 8a, 8b, 8c are again
Move to the bottom of. When the press machine 14 moves the upper mold 13 downward, as shown in FIG. 3B and as described above, both ends of the metal plate 4 are moved by the molds 17a and 17b and the molds 18a and 18b. The folds 19, which are pinched and have acute angles
a, 19b are formed. The supporters 8a, 8b, 8c support the force of the press 14 acting on the rail 5c.

Then, the supporting tables 8a, 8b, 8c are again
The transfer device 11b transfers the metal plate 4 along the rail 5 to the left in FIG. 1, and the metal plate 4 passes through the connection rail 5d and the rail 5e of the seaming device 10
Is transferred to

As described above, the holding member 26,
By the action of the push-up member 27, the pressing member 28 and the expanding member 29, the right end portion of the metal plate 4 in the figure crosses the ridge 22, and the folded portion 19a engages with the folded portion 19b. As described above, the seam 30 is formed by the downward movement of 25, and the metal tube 31 completed in a tubular shape is obtained.

Further, the press machine 25 moves down and the seam 30
Is formed, the support tables 8a, 8b, 8c have moved to the lower part of the base 7, and the support tables 8a, 8b, 8c support the pressing force of the press machine 25.

The obtained metal tube 31 is transferred to the transfer device 1
At 1c, it is transferred to the left in FIG. 1, discharged from the terminal of the rail 5e to the left, and supplied to the next step.

[0058]

According to the present invention, the folded portions 19a and 19b are provided.
The step of forming the joint and the step of pressing the engaged folded portions 19a and 19b to form the seam 30 are both steps using a press machine. Since it can be performed, the operator's hand does not enter under the press machine during these steps, and it is safe.

Further, as described above, the folded portions are formed at both ends of the flat metal plate, and thereafter, the metal plate is formed into a cylindrical shape, and the folded portions are engaged and joined to form a tube. In the method, if the diameter of the metal tube 31 is different, the position where the folded portion is formed is also different, so that it is necessary to change the specifications of the machine.

When a metal tube having a truncated cone shape is to be manufactured, it is necessary to adjust the angles of both ends of the metal plate, which complicates the mechanism and lowers productivity.

However, according to the present invention, only the ends of the cylindrical metal plate 4 are positioned and supported by the rails 5 and the process proceeds only at both ends, so that the state of the parts other than both ends may be affected. Absent. Therefore, even if the diameter or length of the metal tube 31 changes, or even when the metal tube 31 is formed into a truncated cone shape, the other portions are almost adjusted only by adjusting the pressing force of the rollers 2 and 3 in the forming device 1. Without
It can be manufactured with the same mechanical specifications.

Further, even in the case of obtaining a metal tube 31 of a square shape or the like, it is sufficient to change only the forming device 1, and if the metal plate 4 formed into a cylindrical shape in another process is supplied to the rail 5,
By controlling only both ends of the metal plate 4 regardless of its cross-sectional shape,
The splice 30 can be formed automatically.

[Brief description of the drawings]

FIG. 1 is a front view of the apparatus of the present invention.

FIGS. 2A to 2E are cross-sectional views taken along lines AA to EE in FIG. 1, respectively.

FIGS. 3A and 3B are enlarged cross-sectional views of a main part of a portion C-C in FIG. 1, wherein FIG. 3A shows a state in which the metal plate 4 has reached the folding device 9, and FIG. Shows the state pressed by the press machine 14, and (c) shows the folded portions 19a and 19b.
FIG. 4 is a cross-sectional view of a main part of the metal plate 4 on which a pattern is formed.

FIG. 4 is an enlarged cross-sectional view showing a state where the metal plate 4 has reached a portion EE in FIG. 1;

5 is an enlarged cross-sectional view of a main part showing a processing step of the metal plate 4 at a position similar to FIG. 4, wherein (a) shows a state where the right part of the metal plate 4 is moved upward, and (b) shows The right end is deflected to the left, (c) shows a state in which the folded portions 19a and 19b are engaged, and (d) shows a state in which the seam 30 is formed by pressing with the press machine 25. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forming device 2, 3 Roller 4 Metal plate 5 Rail 8a, 8b, 8c Support stand 9 Bending device 10 Seaming device 11a, 11b, 11c Transfer device 12 Lower die 13 Upper die 14 Press machine 15 Sliding piece 19a, 19b Folding Part 22 ridge 24 concave groove 25 press machine 26 holding member 27 push-up member 28 pressing member 29 expanding member 30 joint 31 metal pipe

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akira Morikawa 1-20-5 Tenma, Kita-ku, Osaka-shi, Osaka Zojirushi Mahobin Co., Ltd. (56) References JP-A-6-554 (JP, A) 60-60819 (JP, U) Jiko 43-15000 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 39/02 B21D 51/10

Claims (3)

(57) [Claims] 1. A rail (5) arranged substantially horizontally and supporting and suspending both ends of a metal plate (4) formed in a substantially cylindrical shape, and a metal suspended by the rail (5). Transfer device (11a, 11b, 11) for moving the plate (4) forward;
c), a folding device (9) for folding both ends of the metal plate (4) positioned and supported by the rail (5) in directions different from each other, and a folding device (9) disposed in front of the folding device (9). A seaming device (10) for engaging and pressing the folded portions (19a, 19b) at both ends of the metal plate (4) supported by the rail (5). )
Behind the rail (5), between the folding device (9) and the seaming device (10), and in front of the seaming device (10). An apparatus for manufacturing a metal tube, comprising: a table (8a, 8b, 8c). 2. A rail (5) arranged substantially horizontally and supporting and suspending both ends of a metal plate (4) formed in a substantially cylindrical shape, and a metal suspended by the rail (5). Transfer device (11a, 11b, 11) for moving the plate (4) forward;
c), a folding device (9) for folding both ends of the metal plate (4) positioned and supported by the rail (5) in directions different from each other, and a folding device (9) disposed in front of the folding device (9). A ridge (22) protruding from the upper surface of the rail (5) so as to be able to protrude and retract and a groove (24) formed adjacent to the ridge (22) are formed. Guide means (26, 27, 28) for guiding one end of the separated metal plate (4) to engage the folded portion (19a) of the end with the folded portion (19b) of the other end. , 29) and rail (5)
Folds (19a, 19a) provided above and engaged with
b) a pressing machine (25) for pressing, and a seaming device (25) for engaging and pressing the folded portions (19a, 19b) at both ends of the metal plate (4) supported by the rail (5). 10) An apparatus for manufacturing a metal tube, comprising: 3. A forming device (1) comprising a pair of rollers (2, 3) having different hardnesses at the rear end of the rail (5), and bending a flat metal plate (4) into a substantially cylindrical shape. ) Is provided, and a metal plate (4) formed into a substantially cylindrical shape by the forming device (1) is suspended at both ends thereof supported by the rail (5). To claim
3. The apparatus for manufacturing a metal tube according to 1 or 2.