JP2002331324A - How to make plotter legs - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To manufacture a leg of a plotter from a metal plate only by a pressing process without using a welding process. SOLUTION: A metal plate main body 10 is bent so as to have a cylindrical shape with a predetermined cross-sectional shape, and when joining the side edges 11a, 11b of two butted pieces 10a, 10b of the metal plate main body, the two pieces are joined together. Each of the side edges 11a and 11b is provided with a short folded piece 12a and 12b at an acute angle, and a main piece 21 having a width 2L + ΔL longer than the total length of the both folded pieces, and provided on each side edge of the main piece. And a pair of inward oblique pieces 22a and 22b longer than each of the above-mentioned folded pieces are formed from a metal plate, and the two pieces having the folded pieces of the metal plate body are formed. Of the inward oblique pieces by abutting the side edges of the inwardly inclined pieces, and fitting the above-mentioned joints over the two folded pieces that abut each other.
2 'is brought into contact with the inside of each side edge 11a, 11b of the two pieces of the metal plate body, and each folded piece of the metal plate body is sandwiched between the main piece of the connector and each inwardly inclined piece. Then, the metal plate body is flatly crushed on two pieces having respective side edges.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a leg of a plotter from a metal plate only by pressing.

[0002]

2. Description of the Related Art When a plotter leg is manufactured from a metal plate, two members conventionally formed into a U-shape or a member shaped into a U-shape and a plate-shaped member closing an open surface of the U-shape member are used. The two joints of the two members are usually joined by arc welding and spot welding.

[0003]

In the above conventional method,
The punching and bending of the two members from the metal plate are performed by pressing, but since the joining of both members to produce a product is welding, it takes a long time to weld. There is a problem such as the necessity of a special jig for holding both members in a welding state, which increases the cost of the product.

[0004]

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems by performing stamping and bending from a metal plate, as well as joining, by press working. 2. A method for manufacturing a leg of a plotter, comprising: bending a metal plate main body so as to have a cylindrical shape; and joining two butted side edges of the metal plate main body to each other.
In the above method, the metal plate body is provided with a sharply bent short piece at each of two side edges of the metal sheet body, and a main piece having a width equal to the total length of the two folded pieces; Formed from a metal plate, a joint comprising a pair of inward oblique pieces shorter in length than each of the folded pieces is formed from a metal plate, and the folded piece of the metal plate body is Abutting the side edges of the two pieces, and fitting the fitting to the outside of the butted folded pieces, and placing each folded piece of the metal plate body between the main piece of the fitting and each inwardly inclined piece. The end of each folded piece is flattened by flattening it on two pieces having each side edge of the metal plate body, so that the main piece of the connector and each inwardly inclined piece are flattened. It is characterized by being brought into contact. 3. A method according to claim 2, wherein a connecting member comprising a pair of inwardly inclined oblique pieces formed from a metal plate is formed from a metal plate. A main piece having a width longer than the total length of the two folded pieces, and a pair of pieces provided on each side edge of the main piece to form an inverted C shape and having a length longer than each of the folded pieces. Forming a joint consisting of an inwardly inclined piece of a metal plate from a metal plate, abutting two side edges of the metal plate body having a folded piece, and fitting the joint to the outside of the butted two folded pieces. Thereby, the tip of each inward oblique piece is brought into contact with the inside of each side edge of the two pieces of the metal plate main body, and each folded piece of the metal plate main body is connected to the main piece of the connector and each inward oblique piece. It is characterized by being flatly crushed on two pieces having each side edge of the metal plate body. To. In either of the first and second methods, it is preferable to provide a notch along the edge of each inward oblique piece of the connector.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment is for manufacturing a plotter leg composed of a square tube having a square cross section. Reference numeral 10 indicates that four ridges a, b, c, and d are bent at right angles. , Two pieces 10a and 10b constituting one side 10 'of the rectangular cylinder
2 shows a metal plate main body in which the side edges 11a and 11b abut against each other. Each of the side edges 11a and 11b is provided with the same acute angled short folded piece 12a and 12b.

[0006] Therefore, the folded piece 12a is attached to both side edges 11a.
a, the unfolded metal plate body 10 having the folded pieces 12b at the side edges 11b is punched out from a larger metal plate by a press, and the folded pieces 12a and 12b are pressed at a desired acute angle (for example, 45 °). When the ridges a, b, c, and d are bent at right angles by a press, the folded edges of the side edge 11a having the folded piece 12a and the side edge 11b having the folded piece 11b are protruded. Combine.

[0007] In order to join the side edges 11a and 11b with each other in a state where they abut each other by a press, a joining tool 20 made of a metal plate is formed by a press. This joining tool 20 has a wide main piece 21,
The main piece 21 includes a pair of inwardly-facing oblique pieces 22 provided in each side edge of the main piece 21 to form an inverted C-shape.

In the first embodiment shown in FIG. 1, as shown in FIG.
Folded pieces 12a, 12b provided on the two side edges of
(2L when the length of each folded piece is L), and the length of each inward oblique piece 22a, 22b of the connector 20 is slightly shorter than the length L of the folded piece.

In order to join the butted side edges 11a and 11b of the metal plate main body 10 with the connecting tool 20 of the first embodiment, the side edge 11a having the folded piece 12a of the metal plate main body 10 and the folded piece 12b are joined together. The joints 20 are fitted over the two folded pieces that abut against each other, and the inwardly inclined pieces 22a, 22 of the joints are joined.
b along the inside of each folded piece 12a, 12b (see FIG. 1B), and press each folded piece 12a, 12b by pressing.
b is replaced with the main piece 21 of the connector and the respective inward oblique pieces 22a, 22
b, each side edge 11a,
Flatten each piece 10a, 10b with 11b (see FIG. 1C).

As a result, as shown in FIG. 1 (D), a square prism of the legs of the plotter is formed, and the respective tips 12 'of the folded pieces 12a and 12b of the metal plate main body are flattened and joined. Since the main piece 21 of the metal plate 20 and the inside of the folded portion 23 of each inward oblique piece 22 are in contact with each other, the seam 11 of the butted side edges 11a and 11b of the metal plate main body does not open (separate) but abuts each other. Maintain the state of the tama.

In the embodiment 2 shown in FIG.
Is 2L + ΔL, which is slightly larger than the total length (2L) of the two folded pieces 12a and 12b of the metal plate body, and a pair of inward oblique pieces provided on each side edge of the main piece. The length of 22a, 22b is also longer than each folded piece 12a, 12b, and the total length of the inward oblique pieces 22a, 22b is slightly longer than the width (2L + ΔL) of the main piece 21. And
Each of the inward oblique pieces 22a and 22b is not a straight line, but is folded back into a quarter arc shape, and the rest is straight and oblique (see FIG. 2A).

In order to join the butted side edges 11a and 11b of the metal plate body 10 by the connector 20 of the second embodiment, the side edge 11a having the folded piece 12a of the metal plate body 10 and the folded piece 12b are joined together. The joints 20 are fitted over the two folded pieces that abut against each other, and the inwardly inclined pieces 22a, 22 of the joints are joined.
b against the respective folded portions of the side edge 11a and the folded piece 12a and the side edge 1b and the folded piece 12b (see FIG. 2A), and presses each folded piece 12 by pressing.
a and 12b are connected to the main piece 21 of the connector and each inward oblique piece 22.
a and 22b, and flatly crush the pieces 10a and 10b having the side edges 11a and 11b of the metal plate body 10 (see FIG. 2b).

As a result, as shown in FIG. 2 (C), a square prism of the leg of the plotter is formed, and each tip 22 'of each inward oblique piece 22a, 22b of the connector is flattened metal. The abutting side edges 11a of the metal plate body are in contact with the inside of each folded portion 13 of the side edge 11a and the folded piece 12a of the plate body and the side edge 11b and the folded piece 12b.
Seam 11 between 11b and 11b does not open (separate)
Maintain the condition of the abutment. The ends 12 'of the folded pieces 12a, 12b are separated from the main piece 21 and the folded portions 23 of the inwardly inclined pieces 22a, 22b inwardly, but there is no problem at all.

Both inwardly directed oblique pieces 22a, 22b of the connector 20
May be provided with notches 24... Along the edge as shown in FIG. In this way, the pressing force to fold both inward oblique pieces of the connector 20 under the main piece 21 via the respective fold pieces 12a and 12b is small, and prevents deformation of the legs of the completed plotter. it can.

The shape of the notch 24 is a U-shape maintaining a predetermined interval in FIG. 3A, but may be a semicircle as shown in FIG. 3B, or as shown in FIG. The shape may be a triangle, and in the case of a semicircle or a triangle, a predetermined interval may be maintained as shown in FIG. 3 (A, B) or may be continuous as shown in FIG. 3 (C).

In the illustrated embodiment, the legs of a rectangular cylinder plotter are manufactured. However, the legs of a cylindrical or elliptical cylinder plotter can be manufactured in the same manner. In this case, the plotter legs are flattened according to the curvature of the cylinder or elliptical cylinder. Crush.

[0017]

According to the present invention, since all steps are performed by pressing and there is no welding step, the legs of the plotter can be manufactured from a metal plate with high efficiency and without any trouble.

[Brief description of the drawings]

FIG. 1A is a perspective view of a first embodiment showing a state in which a joining tool is fitted over folded pieces on both side edges of a metal plate main body that abut each other, and FIG. 1B is a state in which the same fitting is fitted and covered; (C) is an enlarged sectional view of a joined state, and (D) is a perspective view of a manufactured cylinder.

FIG. 2A is a perspective view of a second embodiment showing a state in which a joining tool is fitted over folded pieces on both side edges of the metal plate main body that abut each other, FIG. 2B is an enlarged sectional view of the joined state, and FIG. () Is a perspective view of the manufactured cylinder.

FIGS. 3A, 3B, and 3C are perspective views showing three other examples of the joining tool that is fitted over the folded pieces on the opposite side edges of the metal plate body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Metal plate main body 10 'One side of metal plate main body 10a, 10b Two pieces which comprise said one side a, b, c, d Ridge of metal plate main body 11a, 11b Side edge 11 Joint of side edge 11a and 11b 12a, 12b Folded piece 12 'Tip of each folded piece 20 Joint 21 Main piece 22a, 22b Inward slant 23 Folded flat part of main piece and each inward slant 24 Notch

Claims (3)

[Claims] A metal plate main body is bent so as to have a cylindrical shape with a predetermined cross-sectional shape, and the metal plate main body abuts on the metal plate main body.
In the method of manufacturing a leg of a plotter for joining side edges of a piece, the metal plate main body is provided with a short bent piece at each of two side edges to be abutted, and the total length of the both folded pieces is A main piece having an equal width and an inverted U-shape provided on each side edge of the main piece,
A joint consisting of a pair of inward oblique pieces having a length shorter than the length of each of the folded pieces is formed from a metal plate. Two pieces each having a side edge of the metal plate main body, each of the folded pieces of the metal plate main body being sandwiched between a main piece of the connector and each inwardly inclined oblique piece by fitting the above-mentioned connector outside the piece. Characterized in that the tip of each folded piece is brought into contact with the folded portion between the main piece of the above-mentioned connector and each inward oblique piece that has been flattened by crushing flatly on the leg. . 2. A metal plate body is bent so as to have a cylindrical shape with a predetermined cross-sectional shape,
In the method of manufacturing a leg of a plotter for joining side edges of one piece, the metal plate main body is provided with a short bent piece at each of two side edges to be abutted with each other; A joining tool consisting of a main piece having a long width and a pair of inward oblique pieces provided on each side edge of the main piece to form an inverted U shape and having a length longer than each of the folded pieces, from a metal plate. By molding, the side edges of the two pieces having the folded pieces of the metal plate body are abutted, and the joining tool is fitted over the abutted both folded pieces, so that the tip of each inward oblique piece is attached to the metal plate body. Abutting the inside of each side edge of the two pieces of the metal plate body, sandwiching each folded piece of the metal plate body between the main piece of the connector and each inward oblique piece, and holding each side edge of the metal plate body Manufacture of a plotter leg characterized by being crushed flat on two pieces Law. 3. The method for manufacturing a leg of a plotter according to claim 1, wherein a notch is provided along an edge of each inward oblique piece of the connector. How to make plotter legs.