JPH05341140A - Optical fiber sheet folding device - Google Patents

Abstract

PURPOSE:To improve the workability of a device for folding an optical fiber sheet at a constant length, which consists of plural optical fibers arranged in a line, at two points to fold the sheet efficiently, and make the device compact. CONSTITUTION:The longitudinal direction of an optical fiber sheet 6 is inserted to a device in the direction, to which the gravity works, and the sheet 6 is received by a lock plate 13, and supported by a base 14 and a slip preventing plate 15 and a front insertion plate 11 so as to prevent the fall of the sheet 6, and the device has punches 19, 21, which move horizontally to the directions opposite to each other, and air cylinders 16, 20 for driving these punches 19, 21. With this structure, positioning of the sheet is facilitated, and since the sheet is folded at two points simultaneously, the folding time is shortened, and the device is made compact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for bending two optical fiber sheets of a certain length, which are arranged on a plurality of optical fiber sheets, at two predetermined points in the middle thereof.

[0002]

2. Description of the Related Art First, a display device related to the present invention will be described.

A composite image having two or more liquid crystal display elements, the input end face of an optical fiber bundle for transmitting an image is connected to each display screen of the liquid crystal display element, and a boundary region is not formed at the output end face of the optical fiber bundle. Is a structure for forming.

FIG. 8 shows a schematic view of the above display device. The fiber bundle 1 used in this display device is bent at an angle θ in the E plane on the way from the D plane to the G plane and is bifurcated, and further on the F plane on the way from the E plane to the G plane. It is bent at the same angle θ in the opposite direction.
On the other hand, the fork 1a is a display screen 2 of the liquid crystal display element 2.
a is connected perpendicularly to the liquid crystal display element 3a,
Is vertically connected to the display screen 3a. The spacer 4 is interposed in a part of the gap between the adjacent optical fiber sheets so that the bent portions are aligned in the stacking direction.

As described above, since the display unevenness due to the moire fringes is made inconspicuous by bending at two places, a good composite image can be formed. Conventionally, a press brake as shown in FIG. 6 or 7 has been used for bending the fiber sheet used in the above display device.

First, the fiber sheet 6 is pressed against the stopper 7 on the lower die 5, and the hydraulic cylinder 8 is used as a pressure source.
When the upper die 10 descends with the guide 9 as a guide, one of them is bent. In the case of bending at two places, each side was bent twice.

[0007]

By the way, in the conventional folding work using the press brake, the operator keeps the distance L from the end of the fiber sheet to the portion to be folded constant, so that the operator attaches the fiber sheet 6 to the stopper 7. I was working while pressing the end faces and visually confirming that they hit. Also, since it was bent at two points, one at a time, it took a lot of time to fold one sheet. If the bending device is also a ready-made press brake, the size of the device is large,
It required a lot of installation space.

Therefore, an object of the present invention is to provide an efficient optical fiber sheet bending apparatus having good workability.

[0009]

In order to achieve the above-mentioned object, the present invention is an optical fiber sheet bending apparatus for bending an optical fiber sheet having a plurality of optical fibers arranged in a plane, and fixing the inserted optical fiber sheet. The optical fiber sheet bending apparatus is characterized in that the optical fiber sheet bending means comprises: a fixing means for operating the optical fiber sheet, and a bending means that operates in opposite directions to bend both ends of the optical fiber sheet in the opposite directions at the same time.

[0010]

When the conventional press brake is used for bending, the operator visually checks that the end face of the fiber sheet 6 hits the stopper 7 in order to keep the distance L from the end of the fiber sheet to the bent portion constant. Although confirmed, it is not necessary in the optical fiber sheet bending apparatus of the present invention because it is determined by the weight of the fiber sheet itself. Further, in the conventional folding work using a press brake, two places are folded one by one, but the folding machine of the present invention bends them one at a time, so the work time required to bend one fiber sheet Can be reduced to about half. Further, since the air cylinders, which are the drive sources for bending the optical fiber sheet, are horizontally installed facing each other, the device size is compact and the device installation space is small.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of an optical fiber sheet bending apparatus of the present invention is shown in FIGS. 1 and 2
Shows a state in which the optical fiber sheet 6 is loaded into the folding device, and FIGS.
It shows a state in which the part is bent in the opposite direction.

First, the optical fiber sheet 6 is attached to the front loading plate 11
The charging is performed from between the rear charging plate 12 and the rear charging plate 12, and the stop plate 13 performs positioning in the Z direction. The front loading position plate 11 and the rear loading plate 12 are connected at both ends by connecting plates 28, and there is nothing above the front loading plate 11 and the back loading plate 12 of the central fiber loading portion. It is a structure. Further, the optical fiber sheet 6 is supported by the base 14 and the non-slip plate 15 so that the optical fiber sheet 6 does not fall down (see FIGS. 1 and 2).

Next, the air cylinder 16 is moved in the Y direction (-).
When operated in the direction, the upper clamp plate 17 and the lower clamp plate 18 connected to the air cylinder 16 press the optical fiber sheet 6 on the base 14. Then air cylinder 1
The upper punch 19 connected to the optical fiber sheet 6 bends the upper bent portion of the optical fiber sheet 6. After that, when the air cylinder 20 operates in the (+) direction of the Y direction, the lower punch 21 connected to the air cylinder 20 also operates in the (+) direction of the Y direction, and the optical fiber sheet 6 between the lower clamp plate 18 and the lower clamp plate 18. The lower bent portion is bent. When the upper punch 19, the upper clamp plate 17, the lower clamp plate 18 and the lower punch 21 operate in the Y direction, the linear rails 22 and the linear tables 23 and 24 are driven by the air cylinders 16 and 20 as drive sources.
Is a guide. The series of sequence operations described above is performed by the sensor switches 25 and 26 attached to the air cylinder.
Sequence controller 2 with built-in timer
7 is used for sequence control (see FIGS. 1 to 4).

As described above, the bending apparatus of the present invention can bend two places at once as a series of operations.

FIG. 5 shows an enlarged sectional view of the fiber sheet. (A) is a fiber sheet cross section before bending, (b) is during bending, that is, the bent portion of the fiber sheet has an upper pinch 19, a base 14 and a lower clamp plate 18.
FIG. 5 is a cross-sectional view of the fiber sheet when bending is performed by the lower punch 21. In (c), after the bending process, the optical fiber sheet is taken out from the bending machine, and the deformation of the fiber sheet is restored by the spring back.
The cross-sectional shape of the fiber sheet when the angle becomes is shown. The air cylinder shown in this embodiment may be a hydraulic cylinder.

[0016]

EFFECTS OF THE INVENTION The optical fiber sheet bending apparatus of the present invention can be used to bend an optical fiber sheet having a fixed length, which is formed by arranging a plurality of optical fiber sheets in a row, at a fixed two positions at a time, and the bending work time can be increased. Can be shortened. Further, since the distance from the end of the fiber sheet to the bending portion is unconditionally determined by gravity, the bending position can be made uniform.

Further, the optical fiber sheet folding device has two
Since the individual air cylinders are installed horizontally facing each other and the two punches connected to the air cylinders operate horizontally in opposite directions, the installation space of the entire device, especially the device height, is reduced. be able to.

[Brief description of drawings]

FIG. 1 is a plan view showing a basic configuration of an optical fiber sheet bending apparatus.

FIG. 2 is a side view showing a basic configuration of an optical fiber sheet bending device.

FIG. 3 is a plan view showing a state during bending of the optical fiber sheet bending apparatus.

FIG. 4 is a side view showing a state during bending of the optical fiber sheet bending apparatus.

FIG. 5 is an enlarged cross-sectional view of an optical fiber sheet.

FIG. 6 is a schematic diagram of processing when the optical fiber sheet is bent using a conventional press brake.

FIG. 7 is a schematic view of processing when the optical fiber sheet is bent using a conventional press brake.

FIG. 8 is a cross-sectional view of a display device related to the present invention.

[Explanation of symbols]

 1 Optical Fiber Bundle 2 Liquid Crystal Display Element 5 Lower Mold 6 Fiber Sheet 7 Stopper 10 Upper Mold 11 Front Loading Plate 14 Units 16 Air Cylinder 18 Lower Clamp Plate 19 Upper Punch 20 Air Cylinder 21 Lower Punch 23, 24 Linear Table 27 Sequence controller 28 Connecting plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Zenjiro Yamashita 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Prefecture Sharp Corporation (72) Yukio Kurata 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Incorporated (72) Inventor Shigeo Terashima 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka

Claims (1)

[Claims] 1. An optical fiber sheet bending apparatus for bending an optical fiber sheet having a plurality of optical fibers arranged in a plane, the fixing means for fixing the inserted optical fiber sheet, and the optical fiber sheet operating in mutually opposite directions. An optical fiber sheet bending apparatus, comprising: a bending unit that simultaneously bends both ends of the sheet in opposite directions.