JP5968380B2 - Bending test machine - Google Patents

Description

The present invention relates to a bending tester for verifying the bending degree of a thin printed circuit board represented by a mobile phone or a notebook computer. Often they are bent 180 degrees. If these cause bending problems during manufacture, assembly and use, it will lead to equipment failure. In this regard, inspection is required before assembly.

Speaking of a conventional bending tester, one end of a material is fixed, the other end is bent so as to sandwich a jig (plate) serving as a reference for the bending radius, and a load applied to the bent portion is applied by a weight or the like. However, until the workpiece is folded, the member must be compared to the outside of its working range, and the device is enlarged.

The most difficult thing to fold or fold is that the same part may have to be folded many times. In particular, it is difficult to fold mountain valley fold the point, did not go quite do well even in a careful hand was Tsu circumstances der.

JP 2010-183380 JP, 2009-280935, A The above-mentioned case is seen as a related document, but document 1 is an apparatus that automatically sends manuscript paper, and document 2 relates to an antifouling technique.

  The problem to be solved by the present invention is to specialize the above-mentioned problem and strengthen this inspection so that a more strict inspection can be achieved.

Under the above-described problems, the present invention provides a rack that is attached to a base that can move linearly, and a pinion that engages with the rack is provided vertically, with a gap between some of the pinion shafts. Clamped with a holder that is made up of two bent metal fittings , a plate-shaped workpiece is inserted into the gap , both ends can be moved with respect to the bending metal, and is pulled by a spring or weight on the anti-bending metal side and it moves the base folding pinion, that the bending tool member is rotated workpiece, stopping the rotation of the pinion when the workpiece bending bracket is rotated 180 ° becomes parallel to the front and back sides of each bend fittings, actuates the press apparatus is obtained by providing a bending test machine, characterized in that presses the workpiece from both sides.

When the base (rack) is moved by means of claim 1, the pinion (bending bracket) is rotated and the workpiece is bent gradually around the bending bracket by the action of the holders at both ends. When it becomes parallel to the front and back of the bent metal, it is further pressed to make a crease.

It is a top view of the present invention. It is a top view which shows the one part state of this invention. It is a reverse view which shows the one part state of this invention. It is a section front view of the present invention. It is a sectional side view of the present invention. It is a side view of the lower part of this invention. It is a front view of the clamp part of this invention. It is plane explanatory drawing which shows the relationship between a guide bar and a roller, and each process of a press. It is explanatory drawing about the relationship between a pinion and a rack piece. It is plane explanatory drawing which shows each process of 90 degree intervals of a pinion, a workpiece | work, a bending metal fitting, and the pinion of a press apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Although FIGS. 1-6 is a block diagram, this bending testing machine has the box 1, and the inside is substantially space. In the space, a turntable 3 rotated by a motor 2 is provided, and a base 4 is also provided thereon with a gap. A pin 5 is provided at an eccentric part of the rotating disk 3, and the pin 5 is placed in a hole 6 of the base 4 provided at the eccentric part of the rotating disk 3 (FIG. 4). When the motor 2 is driven, the base 4 reciprocates linearly. This is than that known for a long time scotch yoke mechanism (FIG. 2), laid rails 7 in the box 1, when the base 4 is a linear movement so as to move on the rails 7 .

A pinion 8 is provided in the box 1 (FIG. 3), and one rack 9 is engaged with the pinion 8. The relationship between the pinion 8 and the workpiece 10 is that two plate members called bending fittings 11 are erected from the pinion 8, the upper and lower sides of the workpiece 10 are locked on the upper and lower hanging shafts 12, and tightened with the nut 13 from above to bend the bending fitting 11. A sufficient tension is applied to the workpiece 10 (FIGS. 4 and 5). Shims (not shown) are arranged side by side on the hanging shaft 12 sandwiching the workpiece 10 and firmly fixed. Since the workpiece | work 10 is accommodated in the thin metal plate pulled up and down by this, it is stabilized without twisting.

As a result, when the rack 9 is moved, the bending fitting 11 (pinion 8) rotates, and the workpiece 10 is bent around the bending fitting 11 . The most extreme example is the case of bending at 180 ° as shown in FIG. 10 (c). At this time, the press device 14 (described later) is operated to press the workpiece 10 in pressure contact . When the pinion 8 is rotated 180 °, the workpiece 10 becomes parallel to the front and back (Z-fold), but FIG. 10 is a plan view showing the state of rotation at intervals of 90 °, and (c) and (g) This is when bending is the most severe.

In this example, the pinion 10 is rotated by the rack 9, but the rack 9 is slidably accommodated in the rack base 15, and some play is provided at both ends of the rack 9 and the rack base 15 ( FIG. 9). This is a correction motion when the workpiece 10 is not parallel to the press plate 14a described later. Further, in order to make the movement smooth, the bending metal 11 starts to rotate after waiting for the press plate 14a to open.

By the way, a press device 14 is used to reinforce the crease of the workpiece 10 (described later), but the work 10 cannot be kept free even before the press device 14 is operated. And lightly clamped with a holder 16 that has a slack at both ends in a direction parallel to the head. Then, it may be pulled by a light spring, weight or both 17.

The pressing device 14 contacts and separates the pressing plates 14a facing each other, and presses the workpiece 10 when approaching, but needs to operate at a certain timing. Then, it controls by the guide bar 18 stuck in parallel with the rack 9 (The side where the rack 9 is not stuck is also stuck in the same position) (FIG. 3, FIG. 6). That is, the roller 19 linked to the press plate 14 a is rolled on the guide bar 18, and is advanced and retracted by the control of the roller 19 when necessary.

The press device 14 here is characterized in that the other press plate 14a is pulled by a spring, a weight, or both 20, and the operation is soft. Instead, since a press load is always generated on the press plate 14a, on / off control thereof is required. However, since a considerable pressure is required for the press pressure, it is effective to pull the spring 20 so that the opposing surfaces are pressed against each other.

The guide bar 18 is a flat bar, but is inclined downward at both ends (away from the roller 19), and is advanced (operated) when the roller 19 hits the inclined portion (for that purpose). It is always pushed forward by the spring 20, but cannot go forward as long as the roller 19 is traveling on the flat part). When the press device 14 operates (advances), it is when the workpiece 10 is bent at 180 ° with the bending fitting 11 interposed therebetween, and at that time, the press device 14 is set so that it can move forward. When the press device 14 pressurizes the fold of the workpiece 10 (when c ′ and g ′ in FIG. 10), the guide bar 18 and the roller 19 need to be separated so that the press plate 14a can advance. .

When pressurizing the workpiece 10, the press device 14 needs to be separated from the guide bar 18, but this hinders the synchronization of the bending operation and the pressing operation of the workpiece 10. Here, since the rack 9 associated with the base 4 is linearly reciprocated by the Scotch-yoke mechanism, when the rack 9 is completely fixed to the base 4, the work 10 is bent 180 degrees. When the pressure is applied or when the press device 14 tries to return from the bent state before the press device 14 is separated from the work 10 by the guide bar 18, the work 10 may push back the press device 14. This is especially true when the thickness of the workpiece 10 is varied. Therefore, the problem can be solved by allowing the base 4 and the rack 9 to slide during the press operation.

By the way, the above is a test in which the workpiece 10 is bent 180 ° and is subjected to equal pressure on both sides. It is possible to test at an arbitrary angle by applying an arbitrary force. '

As described above, the present invention is all mechanical operations . It does not use any sensing devices such as sensors or actuators such as cylinders or solenoids. If the above-mentioned instrument is used, it is easy, but failure is unavoidable. In this respect, the present invention advances the sequence only by the rotation of the motor 2. That is, the press device 14 may be moved when the rotation of the motor 2 is repeated by an integral multiple of 180 °. In this respect, it can be said to be the most reliable. The bending bracket 11 (pinion 8) is set to rotate forward and reverse by 180 ° when the rack 9 repeatedly moves in one stroke according to the linear reciprocating motion of the Scotch / Yoke mechanism. The folding of 10 is also reversed (Figure 10) .

1 Box 2 Motor 3 Turntable 4 Base 5 Pin 6 Hole 7 Rail 8 Pinion 9 Rack
10 Workpiece 11 Bending bracket 12 Shaft 13 Nut 14 Press device
14a Press plate 15 Rack base 16 Holder 17 Spring and weight

Claims (4)

Attaching the rack can be moved straight base horizontally, provided with a pinion meshing with the rack vertically, constituted by two bent metal having a gap between a portion of the shaft of the pinion, the plate-like into the gap the workpiece It was inserted, movable with respect to bending fittings at both ends, and, clamped in a holder which is pulled by a spring or weight in the counter-bending bracket side and move the base rotates the pinion, i.e. the bending tool member bending the workpiece, the workpiece and rotating bending bracket 180 ° is stopping the rotation of the pinion when it is parallel to the front and back sides of each bend fittings, actuates the pressing device, characterized in that presses the workpiece from both sides Bending test machine. The bending tester according to claim 1, wherein the base is moved by converting a circular motion into a linear reciprocating motion by a Scotch-yoke mechanism . The bending tester according to claim 2, wherein the bending fitting rotates forward and backward by 180 ° as the base reciprocates . The bending tester according to any one of claims 1 to 3, wherein the rack is slidably accommodated in the rack base, and a gap is provided between the rack base at both ends of the rack.