JPS60158920A - Bending device of molding or the like - Google Patents

Abstract

PURPOSE:To perform complicate bending of horizontal direction by protruding a pair of guide pins from a connecting plate used for supporting bending rolls and rocking the plate clockwise or anticlockwise by sliding the guide pins along cam grooves. CONSTITUTION:A base material of molding obtained by bending a flat steel sheet into a desired cross-sectional shape by a cold roll-forming machine 1, is sent to a bending device 3 through a retaining device 2. The device 3 is provided with a pair of bending rolls 31, 32 whose axes 33, 34 are supported, capably of freely idle running, by a connecting plate 40. Guide pins protruded from the plate 40 slide along a cam groove 51, 52 by the cylinders 60a, 60b, etc. of a driving device 60 through a bearing 43. The rolls 31, 32 are rocked by the command of a detector 4, used for detecting the feed length of base material, through the roll axes 33, 34 to bend the material into a S-shape, and moreover the complicated horizontal bending capable of changing a bending curvature on the way of bending is easily performed.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to guide rails, moldings, etc. for window regulators (hereinafter referred to as r-moldings).
In manufacturing, a thin steel plate such as stainless steel is bent into a predetermined cross-sectional shape, and then the axis of a long member (hereinafter referred to as [molding material]) is fed in continuously from side to side or selectively. This invention relates to a bending device that performs uniform bending.

BACKGROUND ART Conventionally, in this type of bending device, a guide roll element for material bending, which forms a gap for material insertion using a plurality of rolls, is attached to an outer frame using a swivel mechanism, and the outer frame is fixed to a rotating plate. The slide plate is supported by a rotor that is pivoted on the machine frame, and the slide plate is mounted on the slide support frame so as to be movable downward by a pole screw mechanism that drives the slide plate with a motor. It is known that a straight material that is inserted from a material delivery positioning guide roll element to a bending guide roll element can be bent in multiple dimensions by being mounted so that it can be moved in the left and right directions using a mechanism. (Special Publication No. 58-43165).

However, this bending device is not only large and expensive to manufacture, but also very heavy and difficult to control accurately due to the influence of inertia during starting and stopping on the left and right sides. You cannot expect a horizontal axis elevation of the street. In particular, when the axis line is approximately S-shaped like the guide rail G for a window regulator (see Fig. 1), even when the axis is bent at -L, the curvature is R+, R2,
It is completely impossible to bend something with different R3 and R4, and the curvature R1' + R2' + R3 as in the rear windshield molding side RH (see Figure 2) and LH (see Figure 3). '+R4'+R5'
When manufacturing a symmetrical item where the bending angle is not constant, it is not possible to switch immediately with one machine, so it is actually necessary to install dedicated machines for right-hand bending and left-hand bending to perform each process.

DISCLOSURE OF THE INVENTION The present invention provides a bending device for moldings that can quickly switch between right bending and left bending with a simple mechanism, and also enables accurate horizontal surface bending without being affected by inertia. The purpose is to provide.

That is, in the bending apparatus for moldings according to the present invention, a pair of left and right parts are located behind a holding device that holds and sends out a molding material in a slidable manner in the axial direction, and that insert and support the molding material within an opposing interval. The bending rolls are supported by a connecting plate so as not to be separated from each other, and a pair of left and right guide bins protrudes below the connecting plate, and each guide bin is a substantially chevron-shaped cam formed on the plate surface of the substrate. A driving device is attached to the connecting plate so that the connecting plate can be swung clockwise or counterclockwise using a guide pin that engages with the groove and slides along the cam groove.

An example will be described below with reference to FIGS. 4 to 11.

This bending device uses a thin metal plate such as stainless steel as a material, bends it into a predetermined cross-sectional shape using a cold roll forming machine 1, and then bends the axis of the molding material in the horizontal direction via a holding device 2. It is designed to be fed continuously (see Figure 4).

The holding device 2 includes stepped rolls 2a, 2a..., 2b, 2 that support the molding material in a slidable manner.
A plurality of rolls b... are arranged in a row on the left and right, and the molding material is linearly fed out between the rolls. Bending equipment M3 located behind it
is equipped with a pair of left and right bending rolls 31 and 32 which are arranged opposite to each other with a gap between the insertion intervals of the molding material.

Each roll 31, 32 is formed of a stepped roll capable of receiving the molding material along its side, and is attached to a support shaft 3.
The plan is to support it so that it can spin freely at an angle of 3°34.

The support shafts 33, 34 (see Fig. 5) sandwich the flanges 35a, 35b and the washers 38a, 3eb-c' rolls 31, 32, and support them so as to be rotatable via bearings 37, 38, 39. ing. In addition, these support shafts 33
．． The bending rolls 31 and 34 are supported by bearings on a connecting plate 40 so as not to be separated from each other. The connecting plate 40
consists of two upper and lower plates 40a and 40b that sandwich the substrate 50 through plates made of a highly slippery material such as lubricating oil-impregnated metal 41, 42, and the spindles 33, 34 of each roll 31, 32 are A guide bin portion 33a (only one side shown) is formed by extending the lower part of the shaft to engage with the cam grooves 51 and 52 of the base plate 50. This guide bin part 3
A bearing 43 (only one side shown) is attached to 3a,
A cam groove 51 into which the bearing 43 is slidably fitted.
52 (see Figure 6.7) is approximately chevron-shaped and guide bin portion 33
It is formed on the plate surface of the substrate 50 in an arc shape that can be moved clockwise, counterclockwise, or in a straight line. This guide bin part 3
The connecting plate 40, which is swing-guided at 3a, is formed into a T-shape with a thousand sides, and the arm portion 40c is provided with a driving device 6 on the tip end side.
0 is attached. This drive device 60 includes a plurality of WIA dynamic cylinders 60a connected in series.

Bob.
(It is connected and attached to the connecting plate 40 by engaging with the connecting bin 44 protruding from the lc via a bearing 45. This drive device 1160 is connected to the molding material sent out from the cold roll forming machine 1. The operation can be controlled using a detector 4 that measures the length (see Figure 4).A rotary encoder or the like may be used as the detector 4. Each cylinder B of the drive device 60 changes its curvature.
Can operate oa, bob, 60c. Further, the board 50 can be fixedly attached to the machine base 55 via left and right spacer plates 53 and 54 (see FIG. 5).

In the molding bending apparatus 3 constructed as described above, when forming the guide rail G (see Fig. 1) with the cold roll forming machine l, the molding side RH, LH (see Figure 2.3)
After bending the cross-sectional shape of the flat steel plate into a C-shape (see Figure 1) or a flat Ω-shape (see Figure 9),
This is to horizontally orient the molding material that is continuously fed through the holding device 2 (see Figures 4.10 and 11). First, in a state where the curvature is zero (see FIG. 4), each bending roll 31, 32 is positioned so that its support shaft 33, 34 is perpendicular to the axis of the molding material, and the drive device 60
In this case, only the cylinder 80a is operated to extend the cylinder stroke. When bending the molding material to the right from the bent state (see FIG. 10), the cylinder 80a is stroked backward, and the bending roll spindles 33 and 34 are swung to the right along the cam grooves 51 and 52. At the limit, the roll 3 on the opposite side centering on the spindle 33 of the roll 33
2 can be swung at a large angle α, whereas when bending to the left (see Fig. 11), the cylinders Boa,
By extending the strokes of all the strokes 80b and 80c, the roll 31 can now be swung to the maximum angle β around the support shaft 34. If the swinging is performed in accordance with the command from the detector 4 that measures the feeding length of the molding material, it is possible to easily bend the continuously fed molding material into a substantially S-shape, and also to Not only can the curvature be easily changed, but also switching between right bending and left bending can be done quickly.

Effects of the Invention As described above, according to the molding bending apparatus according to the present invention, it is possible to easily bend a molding material into a substantially S-shape, and also to easily perform complex horizontal bevels in which the curvature changes during the bending process. Furthermore, the bending process in the left and right directions can be easily switched to efficiently perform the desired axial bending. In this embodiment, a bending device in which the guide pin portions are arranged at the same position as the axes of the bending rolls 31 and 32 has been described, but it is not necessarily necessary to arrange the guide pin portions at the same position. It may be configured to be arranged on a connecting plate on a line connecting the axes of the respective bending rolls.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing examples of axial line bending of moldings, FIG. 4 is a plan view showing a molding bending device according to the present invention, FIG. 5 is a partially cutaway front view of the device, and FIG. The figure is a partially cutaway plan view of the same device, FIG. 7 is a partially omitted perspective view of the same device, FIGS. Figure 11 is an explanatory diagram of the operation of the device. 2: Holding device, 3: Bending device, 4: Detector, 31,
32: bending roll, 50: substrate. 51.52: Cam groove, 60 (BOa, Bob, 80c
): Drive device.

Claims (3)

[Claims] (1) A pair of left and right bending rolls are located behind a holding device that holds and sends out the molding material so that it can slide in the axial direction, and the molding material is inserted and supported within opposing intervals, and the bending rolls are not separated. A pair of left and right guide bins protrudes from the coupling plate, and each guide bin engages with a substantially chevron-shaped cam groove formed on the plate surface of the board, and slides along the cam groove. 1. A bending device for moldings, characterized in that a drive device is attached to the connecting plate so that the connecting plate swings clockwise or counterclockwise with a guide bin. (2) The bending device for moldings as set forth in claim 1, wherein the drive device is constituted by a plurality of drive cylinders connected in series. (3) A bending device for moldings according to claim 1 or 2, wherein the drive device is configured to be drive-controllable by a detector such as a rotary encoder that measures the feed length of the molding material. .