JPH0119981B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for processing a case.

[Prior Art] For example, some cases for electronic devices are designed so that a chassis to which an internal mechanism is attached can be freely attached to the case.

In this case, the case is provided with a locking means so that the chassis does not move when the chassis is attached to the electronic device case.

Further, when the front surface of the case serves as a display section or an operation section, a panel frame having a flange section may be attached to the front surface of the case in order to improve the appearance.

Conventionally, as shown in FIG. 6, a case for such an electronic device is made by bending a single plate into a letter shape to form a case body 11, and attaching a case bottom plate 12 and a case flange 13 to this case body 11. It was made by spot welding.

In addition, as for the method of processing the case, see Figure 7 a and b.
As shown in FIG. 1, a V-shaped punch 14 held on both sides and a die 15 having a V-shaped groove were used to sequentially bend the plate 16 to form a box-shaped case.

[Problems to be Solved by the Invention] However, the conventional case processing method has the disadvantage that the case has many component parts, which increases the number of spot welds, lengthens the processing time, and increases the processing cost. It was hot.

Therefore, the first invention, the processing method for the case, is 1.
By bending a sheet of plate, the number of case components and spot welds can be reduced, and the aim is to shorten processing time and reduce processing costs.

In addition, when processing the case, conventionally the case is bent into a box shape using a double-sided V-shaped punch and die, so the case of the processing machine gets entangled with the punch of the bending machine used for the bending process. However, it was difficult to remove, distorted the case, and had many bends, resulting in poor workability.

Therefore, the second invention, a case processing device,
Use a cantilever-shaped punch so that the tip of the punch does not bend vertically or horizontally when bending the plate, and prevent galling of the plate when pulling up the bent plate. The purpose is to do so.

[Means for solving the problem] For this reason, the case processing method of the first invention involves forming a bending line that forms a flange on the front of the case on one plate, and a part of the plate when assembling the case. a bending line forming a stepped part for stacking and fixing;
Assuming a bending line for configuring the surface of the case, the plate body is bent along the bending line forming the stepped part to form the stepped part, and the bending line forming the flange is bent. The plate body is bent along the bending line to form the flange, the plate body is bent along the bending line to form the surface of the case, and the surface of the case is formed, and the overlapped portion of the stepped portion is formed. It is characterized by processing the case by fixing it.

Further, the case processing device of the second invention is a mold bending machine that bends and processes a single plate, and includes a cantilever-shaped punch, a concave die, and the punch. A supporting mold bending machine body is used, a spacer is provided to be removably interposed between the punch and the mold bending machine body, and an elastic member is provided at the bottom of the concave die. It is a feature.

[Embodiments] Hereinafter, embodiments of the case processing method of the first invention and the case processing apparatus of the second invention will be described based on the drawings, taking a case of an electronic device as an example.

FIGS. 1a to 1f are process diagrams for explaining the case processing method according to the first invention.

In Fig. 1a, 1 is a rectangular plate, and this plate 1 has a flange 2 on the front of the case.
The bending line 2a for forming the plate body 1 is formed parallel to the short side 1a of the plate body 1, spaced inward from the short side 1a by the length of the flange, and when the case is assembled, a part of the plate body is overlapped. A bending line 3a for configuring a stepped portion 3 for fixing the plate body 1 to the long side 1b.
A bending line 41a, which is formed parallel to and spaced inward from the long side 1b by the length of overlapping the plate bodies 1, and further forms the upper surface 41, lower surface 42, left side surface 43, and right side surface 44 of the case. 42a are formed parallel to the long side 1b, separated by a predetermined length.

These bending lines 2a, 3a, 41a, 42a
is an imaginary line to determine the bending position for bending one plate 1, and is not necessarily a line drawn by scribing or the like.

This plate body 1 has character-shaped notches 5a and 5b formed at locations that constitute an upper surface 41 and a lower surface 42 of the case when bent.

These notches 5a and 5b are formed to provide case mounting brackets for attaching the case to a panel, etc., and as shown in the partially enlarged view of Fig. 2, the notches 5a and 5b cut in the shape of letters are further It is bent into a hook shape.

Note that a part of the upper left part of the plate 1 is cut out, but this is a cut out of the part that will become the flange part of the overlapped part of the plate 1, and it is difficult to bend the overlapped part further as a flange. This is why it is provided.

The plate body 1 formed in this way is first shown in FIG.
A bending line 3a forming a stepped portion 3 as shown in
It is bent into a hook shape along the bending line 2a forming the flange 2. Moreover, this folding order may be reversed.

Thereafter, as shown in FIG. 1c, it is bent along a bending line 41a for forming the upper surface 41 of the case.

All of the bends are at right angles and are performed by a well known die bending machine.

The plate body 1 that has been bent up to this point is
With the case processing device invented by
As shown in FIG.
4 along the fold line 42a to form a box shape.

Of the upper surface 41 of the plate 1 bent into a box shape, the plate 1 is overlapped in two layers on the part forming the stepped part 3, so as shown in FIG. It is fixed by welding etc.

The plate 1 which is fixed and formed into a box shape is shown in Fig. 1 f.
It is completed as a case for electronic equipment as shown in the figure.

Next, a case processing apparatus, which is a second invention, used in the step shown in FIG. 1d will be explained.

FIG. 3a is a partially sectional explanatory view showing a case processing device according to the second invention.

In FIG. 3a, 6 is a die bending machine body, and a punch 7 is supported on this die bending machine body 6. This support is provided at one end 7a of the punch 7.
It has a so-called cantilever shape that fixes the mold bending machine body 6 with a certain gap between the support member 8 and the mold bending machine body 6.
This is done by fixing the supporting material 8 and the die bending machine body 6 with bolts 81 via the bolts, and fixing the supporting material 8 and the punch 7 with bolts 82.

The cross section of this punch 7 is, for example, as shown in FIG. 3b, with a concave shape 71 formed at the bottom of the convex shape and a notch 72 formed at the side to improve the shape separation of the material and to perform bending with high precision. It's becoming like that.

Further, a die 9 which works together with the punch 7 to bend the plate 1 is installed below the punch 7, and its cross section is approximately concave. An elastic member 91 such as a coil spring is installed on the bottom 9a of the generally concave die 9, and a support base 92 is installed on the elastic member 91. Note that a rubber material may be used instead of the elastic member 91 and the support base 92.

A plurality of elastic members 91 are arranged along the depth of the die 9 so that the support base 92 can move up and down on average without being tilted vertically.

Furthermore, the corners 9b of the concave die 9 are rounded and rounded, in order to squeeze the material well and to avoid damaging the outer surface of the case.

In addition, a groove 9c is formed in a part of the concave die 9 in a direction perpendicular to the axis. The plate body 1 is kept horizontal to prevent burrs of the flange during bending.

The plate 1 is formed by the mold bending machine configured as described above.
The process of forming a box into a box shape will be explained based on the operation diagrams shown in FIGS. 4a to 4c.

Fig. 4a is a sectional view of the plate 1 placed on the die 9 and the punch 7 lowered to abut against the plate 1; Fig. 4b
4 is a cross-sectional view showing how the plate 1 is gradually bent as the punch 7 is further lowered, and FIG. 4c is a cross-sectional view when the plate is completely bent at a right angle.

First, the plate 1 that has been processed up to the step shown in FIG.
A spacer 10 is interposed between the punch 7 and the punch 7. This spacer 10 is provided to prevent the punch 7 from bending upward when bending the plate 1 because the punch 7 has a cantilever shape. As shown in the figure, it is preferable that the cross section of the spacer 10 is H-shaped to prevent back and forth deflection during processing, but it may be simply rectangular.

After inserting the spacer 10, the punch 7 is gradually lowered downward as shown in FIG. 4a, and the punch 7 is brought into contact with the plate 1.

As the punch 7 is further lowered as shown in FIG. 4b, the plate 1 gradually bends at a right angle.

When the punch 7 is completely lowered, as shown in FIG. can be folded into

When the punch 7 is then pulled upward, the bent plate 1 is automatically pushed upward by the support base 92 and the elastic member 91, and as the punch 7 is pulled up, the plate 1 is also pulled up.

Thereafter, the spacer 10 interposed between the die bending machine body 1 and the punch 7 is removed, and the box-shaped plate 1 is pulled out from the punch 7.

Through this process, a box-shaped case is fabricated from a single plate.

Note that this processing device can be used not only for processing cases but also for folding into letter shapes.

[Effects of the Invention] As explained above, according to the case processing method according to the first invention, a case for an electronic device is processed from a single plate, which is faster than the conventional processing method. The number of component parts of the case is reduced, the number of spot welds is reduced, and processing time and processing costs can be reduced.

Further, according to the processing device for an electronic device case according to the second invention, since a cantilever-shaped punch and a removable spacer are provided on the punch, by removing the spacer, the box-like shape after processing is provided. The case can be easily pulled out, and there is no risk of distorting the case. Furthermore, the spacer interposed between the die bending machine body and the punch prevents the punch from bending upward during bending of the plate.

In addition, the elastic member installed at the bottom of the approximately concave die automatically exerts a force to push the completely bent plate upward, so that the plate does not get jammed when pulled up with a punch.

[Brief explanation of drawings]

Figures 1a to 1f are process diagrams showing the processing method for the case of the first invention, Figure 2 is a partially enlarged view of the cut portion, and Figures 3a and b are of the case of the second invention. Partial cross-sectional explanatory diagrams showing processing equipment, Figures 4a to 4
FIG. c is a diagram of the case folding operation performed by the case processing device of the second invention, FIG. 5 is a configuration explanatory diagram showing another embodiment, and FIGS. 6 and 7 are configuration explanatory diagrams showing a conventional example. . 1...Plate body, 2...Flange, 3...Stepped part,
41a, 42a...Bending line, 6...Bending machine body, 7...Punch, 9...Die, 91...
Elastic member, 10...spacer.

Claims (1)

[Claims] 1. A bending line that forms a flange on the front of the case on one plate, and a bending line that forms a stepped part for overlapping and fixing a part of the plate when the case is assembled. , a bending line for configuring the surface of the case, and bending the plate body along the bending line forming the stepped part to form the stepped part, and a bending line forming the flange. forming the flange by bending the plate along
forming a case surface by bending the plate along a bending line for configuring the case surface;
and a case processing method, which processes the case by fixing the overlapped portions of the stepped portions. 2. A die-bending machine for bending a single plate to form a case includes a cantilever-shaped punch, a concave die, and a die-bending machine body that supports the punch. A case processing device characterized in that a spacer is provided to be removably interposed between the punch and the die bending machine body, and an elastic member is provided at the bottom of the concave die.