JPS625808Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wire rod feeding device for feeding wire into a heading machine such as a header or former.

Conventionally, as a device for supplying wire rod to a heading machine,
A pair of feed rollers consisting of a metal disc with a feed groove slightly larger in diameter than the diameter of the wire to be fed around the outer circumferential surface is used, and the wire is fed by being inserted between the feed grooves of both rollers. However, in such devices, since the contact area between the roller and the wire is extremely small, slips are likely to occur, making it unsuitable for feeding the wire at a high speed. In addition, since slipping occurs, in order to accurately feed wire rods at a constant size, it is necessary to provide a stopper means that makes the wires collide and regulate the amount of feed.In this case, the wire rods collide with the stopper means. There were cases in which volume errors occurred in the cut pieces of the wire due to the rebound during cutting. For this reason, if the clamping force between the rollers is increased to eliminate the above-mentioned slip, there is a risk that the wire may be damaged or deformed, and it is desired to develop a feeding device that can eliminate these problems. was.

The present invention has been developed in response to such demands, and one embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 3, a pair of support members 3 and 4 divided into upper and lower parts are installed on a bracket 2 attached to the upper surface of a base 1, and the lower support member 3 is The upper support member 4 is movable up and down relative to the lower support member 3.
An air cylinder 7 connected to an air supply source (not shown) is attached to the bracket 5 fixed on both sides of the piston rod 8. The tip of the piston rod 8 is connected to the bracket 6 of the upper support member 4, and the piston rod 8 is connected to the bracket 5 of the upper support member 4. By expanding and contracting, the supporting members 3 and 4 can be moved closer to each other or separated from each other.

As shown in FIG. 2, two pulleys 11, 12 and 13, 14 are rotatably supported on the front side of each support member 3, 4 at a predetermined interval. 11 to 14 drive mechanisms,
Returning to FIG. 1, a DC servo motor 15 is installed on the base 1 described above, and this DC servo motor 15 is driven by a pulse oscillator 16 at a predetermined timing, and each pulley 11 to 14 is driven by a pulse oscillator 16. A reduction gear 18 is meshed with a drive gear 17 fixed to the output shaft thereof, and a reduction gear 18 is fitted coaxially with the reduction gear 18. The inner gear 19 meshes with input gears 21 and 22 that are fitted on the rotating shafts of both pulleys 11 and 12 supported by the lower support member 3. , input gears 23 and 24 fitted on the rotating shafts of both pulleys 13 and 14 supported by the upper support member 4 are engaged with each other in a vertically corresponding manner.

Each of the pulleys 11 to 14 described above is a toothed pulley as shown in FIG.
Pulleys 13 and 14 supported by the upper support member 4
Endless belts 25 and 26 are stretched between them in parallel, with their linear running portions corresponding to each other.

The endless belts 25 and 26 are formed by forming a number of recesses 29 at appropriate intervals on the outer peripheral surface of a belt main body 27 made of an elastic material such as a rubber material or a polyurethane material. A metal clamping member 30 is fitted so that the outer circumferential surface is flat, and furthermore, this endless belt 2
A holding groove 31 having a curvature equal to the diameter of the wire rod L to be supplied is provided around the central portion of the outer circumferential surface of the wire rods 5 and 26. Further, the inner circumferential surface of the belt body 27 is provided with engagement grooves 2 that mesh with the teeth of each of the pulleys 11 to 14 described above.
8 is formed.

Furthermore, two pressing rollers 32 are disposed inside the corresponding linear running portions of both endless belts 25 and 26 to press both linear running portions in a direction toward each other. Tension rollers 33 for tensioning both endless belts 25 and 26 are disposed inside the lower linear running section and the upper linear running section of the upper endless belt 26, respectively.

This embodiment has the above-described structure, and its operation will be explained next.

When trying to supply the wire L to the heading machine, first operate both air cylinders 7 to raise the upper support member 4, and then move the wire L to the lower endless belt 25.
By guiding the upper support member 4 into the holding groove 31 of
The wire L is inserted between the corresponding straight running parts 5 and 26.

When the DC servo motor 15 is operated at a predetermined timing by the pulse oscillator 16, the driving force of the DC servo motor 15 is applied to the reduction gear 1.
8. Input gears 21 and 22 via inner gear 19
and 23, 24, and the lower pulley 1
1, 12 and upper pulleys 13, 14 are rotated at a constant angle in opposite directions, and a lower endless belt 25 and an upper endless belt 26, which are stretched around these pulleys 11, 12 and 13, 14, The wire rod L, which is intermittently circulated and held between the corresponding linear running sections, is sent out at a constant length in the direction of the arrow and supplied to the heading machine.

Here, since the wire L is firmly clamped by the holding grooves 31 of the straight running portions of the endless belts 25 and 26, which are pressed in the direction toward each other by the pressing roller 32, the wire L and endless belt 2
5 and 26 is reliably prevented.
Therefore, the driving force of the DC servo motor 15 is applied to various gears, pulleys 11 to 14, and endless belts 25, 2.
6. During the transmission to the wire L, loss due to slipping is almost completely suppressed, and the wire L is reliably supplied to the DC servo motor 15 in constant size portions corresponding to the drive time set. be able to. In addition, the response is good even when feeding the wire L at high speed, which not only eliminates dimensional errors in the cut piece, but also requires special installation of a stopper means to feed the wire in constant size increments, unlike conventional methods. I don't.

Furthermore, since the metal clamping members 30 are fitted on the outer peripheral surfaces of the endless belts 25 and 26, they have excellent rigidity and wear resistance, and the durability of the endless belts 25 and 26 can be improved. Moreover, the retaining groove 3
1 is formed with a curvature equal to the diameter of the wire rod L to be fed, and the contact area between the clamping member 30 and the wire rod L is large. Even if it is firmly clamped, there is no risk that the wire L will be damaged or deformed.

Note that if the upper surface of the clamping member 30 is slightly set back from the outer peripheral surface of the belt main body 27, when the wire L is clamped between the corresponding linear running portions of the endless belts 25 and 26, the wire L will have elasticity. The frictional force of the belt body 27 made of material acts on the wire L and the endless belt 2.
5 and 26 can be more reliably prevented.

Further, in this embodiment, an electric drive source such as a DC servo motor is used as the drive source, but it may be driven from the main shaft of the heading machine via a mechanical transmission mechanism.

As specifically explained in the above embodiment,
The wire rod feeding device for a heading machine of the present invention fits a hard clamping member into the recesses formed at intervals on the outer peripheral surface of a belt body made of an elastic material, and has a curvature approximately equal to the diameter of the wire rod to be fed. Two endless belts each having a retaining groove on the outer circumferential surface are stretched between a plurality of pulleys with their straight running parts corresponding to each other, and the wire is held between the straight running parts for heading. The gist of this is that the wire is fed to the machine by being sandwiched between the holding grooves of the corresponding linear running parts of two endless belts, so that slips of the wire can be almost avoided. Since it can be completely suppressed, it is possible to reliably feed wire rods in fixed size increments, and it is also possible to improve responsiveness when trying to feed wire rods at high speed. Since a large number of hard clamping members are fitted on the outer circumferential surface that clamps the belt, the rigidity and wear resistance of the outer circumferential surface are increased, and the durability of the endless belt can be significantly improved. Since the wire rod is formed with a curvature approximately equal to the diameter of the wire rod, the contact area between the clamping member and the wire rod is large.
This has the effect of preventing the wire from being damaged or deformed even if the wire is firmly clamped.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a rear perspective view of the supply device, FIG. 2 is a perspective view of essential parts, and FIG. 3 is a partially enlarged perspective view of the endless belt. 11, 12, 13, 14... Pulley, 25, 2
6... Endless belt, 27... Belt body, 29...
... recess, 30 ... clamping member, 31 ... holding groove, L
……wire.

Claims (1)

[Scope of utility model registration request] Hard clamping members are fitted into recesses formed at intervals on the outer peripheral surface of the belt main body made of an elastic material, and holding grooves having a curvature approximately equal to the diameter of the wire to be supplied are provided around the outer peripheral surface. It is characterized by having a structure in which two endless belts are stretched between a plurality of pulleys with their linear running parts corresponding to each other, and the wire is held between the linear running parts and fed to a heading machine. A wire rod feeding device for heading machines.