JPS6041301Y2 - Roller device for supplying strip pieces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a roller device for feeding strip pieces toward a punch.

[Conventional technology]

Roller strip feeders are known from the past, which have an independent drive mechanism that feeds the strip until it contacts a stop; these known devices are designed so that the strip is ejected just before impact. It has a device in front of the slide that forces the rollers apart at a known, precisely set angle.

Since the strip piece is not always perpendicular to the roller,
It is necessary to push the rollers apart in this way, so that the strip pieces slide laterally until they are stopped by the strip guide of the tool.

Furthermore, when the tool occupies more than one position and a gripper (center finder) of the tool is provided, it is necessary to eject the strip piece so that the gripper can center the strip piece before impact. be.

A disadvantage of roller devices for delivering strips to a stop is that the gap between the rollers must be set when no strips are being fed, and therefore the device for pushing the rollers apart also requires precise settings. This is what is needed.

Another disadvantage of known roller devices of this kind with an independent drive for delivering the strip pieces to the stop is that the rollers are pressed by strong prestressed springs, which also The periodic release of the rollers causes an additional force to be applied, resulting in an overstressed condition, and the total force to deform the spring into the released position is generated by a slide-actuated lever device, which The forces are transmitted as reaction forces to the housing, support and mounting members of the feeder, making the device bulky and heavy.

Similarly, devices with screw jackets for vertical movement of the device can also be bulky and heavy.

[Problem that the invention attempts to solve]

It is therefore an object of the present invention to eliminate the need for a mechanism to release the rollers prior to collision, to eliminate the load on the support and mounting members from the forces generated by the lever device, and to reduce the weight of the device, especially The goal is to reduce the weight of the housing.

Furthermore, it is to speed up and simplify the setting of the second gap in order to determine the first gap.

Also, by eliminating vertical loads and having a lighter weight, it can be easily moved to set the reference level of the dice.

[Means for solving problems]

The above objects are further related by providing a roller-type device which feeds the strip towards the punch at the speed of the strip until it contacts a stop.

In this device, at least one of the rollers;
That is, the upper roller is provided with a plurality of regions having a diameter slightly smaller than the outer diameter that constitutes the outermost contour of the roller, and these regions are distributed along the circumference of the outer circumferential surface of the roller. and smooth transitions at the boundaries of each adjacent region.

Opposite surfaces of the housing supporting the top and bottom rollers are each provided with spacers between which test stripes of the same thickness as the material to be drilled are sandwiched.

The rollers are sequentially pressed by a device that provides the desired pressure.

The apparatus is provided with cam arms for rapid vertical positioning of the top and bottom rollers relative to the drilling tool.

Advantages of the invention include reduced set-up time, automatic strip feeding in small-scale production, increased productivity, and labor savings.

Embodiments Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The roller device of the present invention, shown in FIG. As is clear from FIG. 5, the upper roller 3 has regions 3b and 3c along the circumferential direction of the outer peripheral surface, each having a diameter slightly smaller than the maximum outer diameter region 3a of the roller. They are evenly spaced and evenly distributed to provide smooth transitions between adjacent regions.

The bottom roller 2 and the top roller 3 are connected to each other by a pair of gear wheels 8, a pulley is fixed on the shaft of the bottom roller 2, and the bottom roller 2 is rotationally driven by a belt 9 driven by a motor 10. be done.

A pair of spacers 5, 5 as shown in FIG. 6 are fixed to the opposing surfaces of the lower housing H1 and the upper housing H2, and a groove 13 for the inspection stripe 6 is formed between these spacers 5, 5. is provided.

Further, a cam arm 7 that can pivot about a support shaft 14 is pivotally supported on the lower housing H1, and the cam arm 7 is moved to match the height of the lower housing H1 with the reference level of the tool. It has become.

That is, by lifting this cam arm 7, the installation height of the strip piece 1 can be adjusted to the reference level of the tool.

The upper roller 3 is equipped with an electromagnetic, pneumatic, or hydraulic pressure device 4.
It is pressed towards the bottom roller 2 by.

When setting up this roller device for operation with a new tool, a test strip 6 having the same thickness as the strip 1 of material to be drilled is introduced into the groove 13 between the spacers 5,5.

Preferably, the gap between the bottom roller 2 and the top roller 3 is slightly narrower than the thickness of the strip 1 being fed so that the strip 1 can be gripped (see FIG. 2).

When the lower housing H1 is moved up and down by the oscillating operation of the cam arm 7 to equalize the gap between the bottom roller 2 and the upper roller 3 with the reference level, the strip piece 1 can be moved into the tool. , the device enters the operating state.

When a new strip comes in, it is necessary to rotate the rollers so that the smaller diameter areas 3b, 3c are at the entry end of the strip 1, as shown in FIG.

As shown in FIG. 2, when the bottom roller 2 and the top roller 3 feed the strip 1, the distance between the axes of both rollers is greater than when the strip 1 is not interposed (FIG. 3). The distance between the axes of both rollers pulsates smoothly within this range.

That is, it pulsates between 0.3 mm and 0.1 incline as many times as the number of small diameter regions of the upper roller 3 per revolution.

This pulsation is carried out under the action of the pressurizing device 4.

The upper roller 3 dips in an area of small diameter, but sufficiently contacts the strip 1 (FIG. 4), at which point the strip leaves between the rollers.

The detached strip springs up elastically from the transverse strip guide, but the rollers are rotating until the strip reaches the stop, so strip 1 is always pressed until it collides (Figure 2). .

This does not prevent the gripper from concentrating the strip pieces longitudinally and transversely.

This is because the axial force on the strip is adjusted in a known manner by means of the drive, relative to the force in the case of manual feeding of the strip.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an o-roller device for supplying strip pieces according to the present invention, Fig. 2 is a schematic diagram showing an upper roller and a bottom roller that sandwich a supplied strip piece, and Fig. 3 is a longitudinal sectional view showing an o-roller device for supplying a strip piece according to the present invention. Figure 4 is a schematic diagram showing the rollers rotating at an angle that allows the strip to pass between the rollers; Figure 5 is a profile of the upper roller; FIG. 6 is a perspective view showing a spacer holding a test strip. DESCRIPTION OF SYMBOLS 1... Strip piece, 2... Bottom roller, 3... Upper roller, 4... Pressure device, 5... Spacer, 6...Inspection stripe, 7...Cam arm, 8...
Gear wheel, 9... Belt pulley, 10
...Motor, 13...Groove.

Claims (1)

[Scope of utility model registration request] upper and lower housings that are movable independently of each other;
A bottom roller is pivotally supported on the side of the lower housing, a cam arm is pivotally supported at its intermediate portion with respect to the lower housing and is movable up and down with respect to a fixed installation surface for fixing the lower bousing, and a cam arm is attached to the upper housing. A region that is pivoted on the side and has a diameter slightly smaller than the maximum outer diameter region of the outer circumferential surface is
Upper rollers are uniformly distributed along the circumference of the outer surface at equal intervals to ensure a smooth transition between adjacent areas, and pressure is applied to press the upper housing against the lower housing. A roller device for supplying a strip piece, comprising: a device; and a spacer fixed between opposing surfaces of the upper and lower housings to sandwich an inspection stripe having the same thickness as the strip piece.