JPS646983Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pre-bender device for pre-bending a sheet material to be press-formed.

Conventionally, when press forming sheet materials with low rigidity, a pre-bender device is installed on the sheet material input side of the press to prevent the sheet materials from bending during conveyance.
It is pre-bent into a letter shape. In addition, with conventional pre-bending equipment, the pre-bending position is either in the center of the sheet material or
There was a problem that pre-bending could not be performed for some products because it was limited to symmetrical positions.

This invention was made to solve this problem, and aims to expand the range of products to which it can be applied by providing a pre-bender device that can set the pre-bending position to an arbitrary position on the sheet material.

This invention will be explained below with reference to an illustrated embodiment. FIG. 1 shows an overall press line, which includes a press body 1 having a plurality of processing stations W ₁ to W ₅ and a press body 1 having a plurality of processing stations W 1 to W 5 . sheet material 2
A pre-bender device 4 is installed between the de-stacker 3 and the press body 1.

As shown in FIGS. 2 and below, the pre-bender device 4 is located at an idle station i4 between the front and rear uprights 1a located on the sheet material 2 loading side of the press body 1, and is configured as follows. In other words, 5 is a base, and a lower traveling carrier 6 is mounted on this base 5 so as to be movable along the conveyance direction A of the sheet material 2.
is supported via rollers 7. Above the lower traveling carrier 6, an upper traveling carrier 10 supported by a pedestal 8 via rollers 9 is supported so as to be movable in the same direction as the lower traveling carrier 6.
Threaded rods 11 are provided at both ends of these upper and lower traveling carriers 10, 6 to pass through them in the horizontal direction.
Nuts 12, which are non-rotatably housed in a, are screwed onto these threaded rods 11. Further, one end side of each threaded rod 11 located at both ends of the upper and lower traveling carriers 10 and 6 is interlocked via a connecting rod 13 and a bevel gear 14 that are provided parallel to the upper and lower traveling carriers 10 and 6. In addition, the upper traveling carrier 10
A sprocket 15 is provided at the other end of the threaded rod 11 located on one end side (the left side in FIGS. 2 and 3), and this sprocket 15 and a shift gear installed at the top on the pedestal 8 side It is linked to a sprocket 17 of a motor 16 via a chain 18. The power of the shift motor 16 is transmitted to the interlocking shaft 22 via the upper bevel gearbox 19, the interlocking shaft 20, and the lower bevel gearbox 21, and is further transmitted to the screw rod 11 via the bevel gearbox 23.
The screw rods 11 located at both ends of the upper and lower traveling carriers 10 and 6 are connected to the shift motor 16.
so that they are rotated simultaneously in the same direction.

On the other hand, on the upper surface of the lower traveling carrier 6 and the lower surface of the upper traveling carrier 10, an arc-shaped guide rail 24 centered on the center O of each carrier 6, 10 is provided.
are installed, and flange portions 25a and 26a of a lower rotating carrier 25 and an upper rotating carrier 26 are slidably supported on these guide rails 24. Further, a guide rod 28 is supported on both ends of the upper and lower rotating carriers 26 and 25 via a guide tube 27 so as to be able to move vertically.
A substantially chevron-shaped lower mold 29 between the upper ends of each guide rod 28
The bottom surface is fixed. The lower mold 29 is a lower mold lifting cylinder 3 provided in the lower rotating carrier 25.
0, and a roller support member 31 is fixed between the lower ends of each guide rod 27 of the upper rotating carrier 26. The roller support member 31 is vertically movable by a roller lifting cylinder 32 provided on the upper rotating carrier 26, and two rollers are provided at the bottom of the roller support member 31 at positions sandwiching the ridgeline of the lower die 29. 33 are supported so that the sheet material 2 can be pre-bended between these rollers 33 and the lower die 29.

On the other hand, drive shafts 34 and 35 are projected from the upper and lower surfaces of each of the above-mentioned swing carriers 26 and 25, and these drive shafts 34 and 35 are connected to the upper side of the upper traveling carrier 10 and the lower side of the lower traveling carrier 6 via a joint 36. The output shafts 37a, 38a of bevel gear boxes 37, 38 installed in Input shafts 37b, 38 of the bevel gear boxes 37, 38
b is a connecting shaft 4 having a spline joint 39 in the middle;
0 to output shafts 41a, 42a of other bevel gear boxes 41, 42. The bevel gearboxes 41 and 42 are installed vertically apart from each other and are interlocked with each other by an interlocking shaft 43, and a tilting motor 44 is connected to the input shaft of one of the bevel gearboxes 41. The upper and lower swing carriers 26 and 25 can be simultaneously tilted around O by the motor 44.

In the figure, 45 is a transfer bar for conveying the sheet material 2 to each processing station _W1 to _W5 of the press body 1, and 46 is a skitte bar provided before and after the lower mold 29, which has the function of supporting the sheet material 2. .

Next, the action will be explained.

Sheet material 2 sequentially carried out from day stacker 3
reaches idle station _i4 via idle stations _i1 to _i3 . At this time, the lower die 29 is retracted downward. Sheet material 2 is Skittoba 4
6, the lower mold lifting cylinder 30
As a result, the lower mold 29 is raised to the position shown by the imaginary line in FIG. 4, and the sheet material 2 is preliminarily bent between it and the roller 33 waiting above. After the preliminary bending is completed, the lower mold 2
9 is lowered to the standby position, and the pre-bent sheet material 2 is sequentially conveyed by the transfer bar 45 to each of the processing stations W ₁ to _{W 5} of the press body 1 and subjected to predetermined press forming.

On the other hand, the preliminary bending position of the sheet material 2 can be arbitrarily set by shifting the upper and lower traveling carriers 10 and 6 or by tilting the upper and lower rotating carriers 26 and 25.

That is, when it is desired to shift the end of the preliminary bending from the center of the sheet material 2, the screw rods 11 at both ends of the upper and lower traveling carriers 10, 6 are simultaneously rotated by the shift motor 16. As a result, the upper and lower traveling carriers 1
0 and 6 are screw-fed along the threaded rod 11, so when the ridgeline of the lower die 29 reaches the pre-bending position, by stopping the shift of the upper and lower traveling carriers 10 and 6, the sheet will be held at that position from now on. Preliminary bending of the material 2 can be performed.

In addition, when it is desired to tilt the preliminary bending position with respect to the transport direction, the tilt motor 44 connects the bevel gear boxes 41, 42, and the spline joint 3 in the middle.
9 and a bevel gearbox 3
The drive shafts 34, 35 are rotated via the shafts 7, 38.
Each drive shaft 34, 35 has an upper and lower rotating carrier 2.
6, 25 are attached, and the drive shafts 34, 35
tilts in the same direction as it rotates. By stopping the tilting when the ridgeline of the lower die 33 reaches a predetermined angle, the sheet material 2 can be pre-bent at that angle, and by combining the above-mentioned tilting operation and the above-mentioned shifting operation, Pre-bending can be performed on the sheet material 2 at desired positions.

As described in detail above, this invention allows the lower die and rollers for pre-bending the sheet material to be freely shifted in the conveying direction of the sheet material, and also to be tiltable around the bending center. By combining these, pre-bending can be performed at any desired position on the sheet material, thereby greatly expanding the range of products to which pre-bending can be applied.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Figure 1 being an overall plan view and Figure 2 being an enlarged plan view of this device.
FIG. 3 is a side view of the same, and FIG. 4 is a front view of the same. 2 is a sheet material, 6 is a lower traveling carrier, 10 is an upper traveling carrier, 25 is a lower rotating carrier, 2
6 is an upper swing carrier, 29 is a lower die, 33 is a roller, and 45 is a transfer bar.

Claims (1)

[Scope of utility model registration request] An upper and lower traveling carrier 10 is provided on the sheet material 2 loading side of the press body 1, which is equipped with a transfer bar 45 for conveying the sheet material 2 to be formed, and is vertically spaced apart and movable in synchronization with the conveying direction of the sheet material 2. ,6
The upper and lower rotating carriers 26 and 25 are provided on the lower and upper surfaces of the upper and lower traveling carriers 10 and 6 and are rotatable in synchronization.
A pre-bender device is provided with a lower die 29 movable up and down at the top, and a roller 33 movable up and down for pre-bending the sheet material 2 between the lower die 29 and the lower part of the upper rotating carrier 26.