JPS62270289A - Manufacture of can with handle - Google Patents

Abstract

PURPOSE:To prevent a rusting for long term by coating a paint on the outer surface of a handle fitting, fitting a spot welded electrode in to the handle fitting hole of this fitting, pushing it so that a projecting piece is bitten into the can main body and performing the welding. CONSTITUTION:A fitting 4 is composed of the handle fitting hole 7 formed at about center part of the fitting main body 5 so as to form a burr 6 and plural projecting pieces 8 formed on the tip part of the opening part side of the main body 5. A paint is coated on the outer surface of the fitting 4. The insertion piece 12 of one part of the electrode 13 comes into contact with a metal face by pushing it into the fitting hole of the fitting 4 and the conduction is surely performed. The projecting piece 8 of the fitting 4 is bitten to the metal part of the can body 2, becoming in the conduction state by pressing the electrode 13 of one part fitting the fitting 4 so as to connect with the electrode 14 of the other part subjected to a spot welding fitted to the can main body 2 enabling the conduction. The fitting 4 and can main body 2 are fixed by spot welding by performing a spot welding, passing a current in this state.

Description

[Detailed description of the invention] 3. Detailed description of the invention "Industrial application field" The present invention relates to a method for manufacturing a can with a handle.

``Prior art'' Conventionally, when manufacturing cans with handles, the can body is formed from a tin plate, metal fittings for attaching the handle are formed from the tin plate, and then metal fittings are used to attach the handle to both sides of the opening side of the can body. were fixed with spot welding.

For this reason, the surface of the tin plate had to be exposed in order to make the surface of the handle attachment plate conductive to one of the electrodes for spot welding.

Therefore, when installing a handle, the metal fittings are likely to rust in a short period of time.
There was a drawback that rust formed and the product became defective. Additionally, if you install the handle by painting the metal fittings to prevent rusting, it cannot be fixed to the can body by spot welding, so the metal fittings must be painted after spot welding, which is a hassle and increases costs. there were.

``Object of the present invention'' In view of the above-mentioned drawbacks of the conventional art, the present invention provides a handle mounting structure that is formed to prevent rusting and that allows the metal fittings to be easily fixed to the can body by spot welding. To provide a method for manufacturing a can with a handle that can efficiently prevent intermittent rusting and prevent the production of defective products.

"Means for Achieving the Objects of the Invention" The present invention relates to a can body manufacturing process in which the can body is manufactured using a metal material, and a process for attaching a handle to the can body manufactured in the can body manufacturing process. The handle is plate-shaped and is made of a metal material with a hole formed in the center and multiple protrusions at the tip of the opening. A handle manufactured using the manufacturing process includes a paint application process in which paint is applied to at least the outer surface of the metal fitting, and a handle that has gone through this paint application process. At the same time, the other electrode of the spot welding is attached to the can body in a conductive manner, and the handles are attached to both sides of the opening side of the can body by spot welding. The method is characterized in that it includes a spot welding process for fixing the metal fittings, and a handle attachment process for attaching the handle to the can body in this spot welding process.

"Embodiments of the present invention" The present invention will be described in detail below with reference to embodiments shown in the drawings.

In the embodiments shown in FIGS. 1 to 6, 1 is a can body manufacturing process 1 in which the can body 2 is manufactured using a metal material such as tinplate.
So, the main body of this can! The metal material such as tin plate used in the A building process 1 has its outer surface printed by painting or the like.

Reference numeral 3 indicates that the handle is attached in the manufacturing process of the metal fittings, and this handle attachment is manufactured in the metal fitting manufacturing process 3. The metal fitting 4 is a plate-shaped plate made of tin plate as shown in Figures 2 to 4. 1 is a metal fitting main body 5, this attachment is formed so that a burr 6 is formed in the approximate center of the metal fitting main body 5, the handle is attached through a hole 7, and the said attachment is formed in a plurality of holes formed at the tip of the metal fitting main body 5 on the opening side. It is composed of two projecting pieces 8.

9 indicates 60.Handle mounting is a paint application process in which paint 10 is applied to the outer surface of the metal fitting 4.In this paint application process 9, the handle is manufactured in the metal fitting manufacturing process 3. The mounting is done in such a way that paint is not applied to the inner wall of the hole 7.

Reference numeral 11 indicates spot welding in which the paint 10 is applied to both sides of the opening side of the can body 2 manufactured in the can body manufacturing process 1 in the paint application process, and the metal fittings 4 are solidified by spot welding for attaching the handle. In this spot welding process 11, as shown in FIGS. 5 and 6, one electrode 13 of the spot welding has an insertion piece 12 inserted into the hole 7 to attach the handle to the metal fitting 4. Do this using The insertion piece 12 of this one electrode 13 is formed in the shape of a truncated cone, and the outer peripheral surface is formed in the shape of a file. That is, one electrode 1
When attaching the insert piece 12 of the metal fitting 4 with a handle, the insert piece 12 of one electrode 13 will damage the inner wall surface of the hole 7 and come into contact with the metal surface. It is possible to ensure conduction.

In addition, as mentioned above, when attaching the handle, one electrode 13 with the metal fitting 4 attached is pressed so as to be electrically connected to the other spot welded electrode 14 that is electrically attached to the can body 2.
When attaching the handle, the protruding piece 8 of the metal fitting 4 sinks into the metal part of the can body 2, creating a conductive state. In this state, by applying a current and performing spot welding, the handle can be fixed by spot welding the metal fitting 4 and the can body 2.

15 is a process for attaching a handle to the can body 2, in which the tip of the handle 16 is attached to the metal fitting 4.4 is attached by inserting the handle of the metal fitting 4 into the hole 7 respectively. .

In the method for manufacturing a can with a handle configured as described above, when attaching a handle whose outer surface is painted with paint 10, the metal fitting 4 can be fixed to the can body 2 by spot welding. In addition to being able to be attached by the same work as the attachment, since the paint 10 is applied to the outer surface of the metal fitting 4 when attaching the handle, interference can be prevented for a long period of time.

"Different Embodiments of the Present Invention" Next, different embodiments of the present invention shown in FIGS. 7 to 13 will be described. In the description of these embodiments, the same components as those of the embodiments of the present invention are designated by the same reference numerals and redundant explanations will be omitted.

The main difference between the embodiments shown in FIGS. 7 to 10 and the embodiments of the present invention described above is that the handles are attached using metal fittings! J culm 3
In △, this handle attachment is manufactured in the metal fitting manufacturing process 3A.The metal fitting 4A is manufactured in the metal fitting manufacturing process 3A. By forming the handle attachment fitting 4A in this way, one electrode 13 for spot welding in the spot welding step 11 and the handle attachment fitting 4A can be easily brought into conduction.

The embodiments shown in FIGS. 11 to 13 are mainly different from the embodiments of the present invention described above.
This spot welding process 11△ is shown in Figure 12 and Figure 1.
As shown in Fig. 3, spot welding is performed using one electrode 13△ for spot welding, which has a plurality of sharp protrusions 17 formed in the axial direction of the outer peripheral surface of the insertion piece 12A. By forming one electrode 13Δ, the handle can be attached to the metal fitting 4 even if paint adheres to the inner wall surface of the hole 7.
The protrusion 17 of the insertion piece 12A allows the paint to fall off and ensure electrical continuity.

"Effects of the Present Invention" As is clear from the above description, the present invention has the following effects.

(1) The can body manufacturing process in which the can body is manufactured using metal materials, and the can body manufactured in this can body manufacturing process has a dish-shaped hole for attaching the handle approximately in the center. A handle mount made of a metal material with a plurality of protrusions formed on the tip end on the opening side is manufactured in the manufacturing process of the metal fitting, and a handle mount manufactured in the manufacturing process of this handle mount metal fitting is manufactured in the manufacturing process of the metal fitting. A paint application process of applying paint to at least the outer surface, and a handle installation after this paint application process are carried out. At the same time, place the other electrode of the spot weld on the can body so as to make it conductive, and place the handle on both sides of the opening side of the can body. ~ Welding process, and this Spora 1~ Welding process to attach the handle attached to the can body (Handle attachment of the metal fitting [Handle attachment process to attach the handle to the hole). The handle attachment fitting coated with paint can be prevented from being fixed to the can body by spot welding 1. Therefore, the handle fitting can be attached to the can body in the same manner as in the past.

(2) According to (1) above, since the paint is applied to the outer surface of the handle No. A metal fitting, it is possible to prevent rust from forming over a long period of time. Therefore, -1
This effectively prevents the occurrence of defective products due to item 1.

(3) Through (1) and (2) above, the reliability of the product can be improved.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing one embodiment of the present invention, FIGS. 2 to 4 are explanatory diagrams of metal fittings for attaching the handle, and FIGS. 5 and 6 are explanatory diagrams showing one terminal for spot welding. FIGS. 7 to 10 and FIGS. 11 to 13 are explanatory diagrams showing different embodiments of the present invention, respectively. 1: L on the can body! 1 manufacturing process, 2: Can body, 3.3A: Handle installation is metal fittings, 4.4△: Handle installation is metal fittings, 5: Installation is metal fitting body, 6.6A: Burr, 7: Handle installation is a hole, 8: protruding piece, 9: paint application process, 10: paint, 11.11A nispot welding process, 12.12A: insertion piece, 13.13Δ one electrode, 14: other electrode, 15: handle installation is a process, 1
6: Handle, 17: Projection. Patent application Jinseki 1) Yoshinobu

Claims (1)

[Claims] 1) A can body manufacturing process in which the can body is manufactured using a metal material, and a plate-shaped approximately central portion for attaching a handle to the can body manufactured in the can body manufacturing process. A manufacturing process for a handle mounting bracket made of a metal material in which a handle mounting hole is formed and a plurality of protrusions are formed at the tip end on the opening side, and a handle mounting bracket manufactured by the manufacturing process for the handle mounting bracket. A paint application step of applying paint to at least the outer surface of the can body, and one electrode of the spot weld is installed in a conductive manner in the handle attachment hole of the handle attachment fitting after this paint application step, and the projecting piece is bitten into the can body. At the same time, the other electrode of the spot weld is attached to the can body in a conductive manner, and the spot welding process is performed to fix the handle attachment fittings on both sides of the can body on the opening side. 1. A method for producing a can with a handle, the method comprising the step of attaching a handle to a handle attachment hole of a handle attachment fitting attached to a main body. 2) The method for manufacturing a can with a handle according to claim 1, wherein the can body is made of tinplate material and the outer periphery is coated with paint. 3) The method for manufacturing a can with a handle according to claim 1 or 2, wherein in the process of manufacturing the handle attachment fitting, a burr is formed in the handle attachment hole. 4) The can with a handle according to any one of claims 1 to 3, wherein the paint application step is performed so that the paint does not adhere to the inner wall surface of the handle attachment hole of the handle attachment fitting. manufacturing method. 5) In the spot welding process, one of the spot welding electrodes inserted into the handle mounting hole of the handle mounting bracket is formed into a truncated conical shape, and the outer periphery is formed into a file shape etc. that cuts into the handle mounting hole. 5. A method for manufacturing a can with a handle according to any one of claims 1 to 4.