JPS6244885Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a comb-like attachment for preventing coil loosening in a coil binding device.

Band binding of multiple coils obtained by slitting a wide coil to a specified width dimension is performed using an unloader equipped with an arm that supports a group of multiple coils, and a device that prevents each coil supported by the arm from loosening. This is carried out using a band binding device that includes a coil holding device having a comb-like attachment and a binding machine that winds and binds a binding band for each coil. As shown in FIG. 5, the bundling is performed by supporting a multi-thread coil C connected to the arm 1 of the unloader in the axial direction, and with the comb-like attachment 2 in contact with the upper circumferential surface of the unloader arm 1. The band B fed in a loop from the binding header of the binding machine is passed through the groove 4 defined between the protrusions 3 forming the comb teeth, the band is wound for each coil, and the circumferential surface is bound. do.

In order to smoothly perform the above-mentioned band binding for each coil and to obtain a tight and strong binding state, the projecting piece 3 of the comb-shaped attachment 2 applies the required pressure to the upper circumferential surface of each coil group on the arm. Each coil must be firmly abutted with force and held without loosening.

However, the circumferential surface level of each coil supported by the arm is not necessarily the same, and there is usually some unevenness between the coils. In particular, the thickness of the wide coil before being slit into multiple coils is
Strictly speaking, it is not uniform; it is thickest at the center and thinner toward both edges, so the winding diameter of each slit coil also varies depending on the thickness of the plate.
Therefore, when supported by the arm, the circumferential surface of the coil in the center is the highest, as shown in FIG.
The closer you go to both ends, the lower it gets. Therefore, with conventional comb-like attachments, even if the protruding piece is firmly pressed against the coil circumferential surface, the holding effect is limited to some coils, and it is not possible to uniformly and reliably prevent loosening of all coils. It was not possible.

The present invention solves the above problems.

The comb-like attachment of the present invention is characterized in that a cushion pin is attached to the lower end of each protrusion via a spring.

An embodiment of the present invention will be described with reference to FIGS. 1 to 4. Reference numeral 5 designates a cushion pin mounting hole drilled in the lower part of the protruding piece 3, 6 a cushion pin, and 7 a coil spring. A bush 8 is fitted into the lower end opening of the hole 5 with a screw or the like, and is further fixed with a screw 9 or the like if necessary.

The cushion pin 6 has a flange 61 on its body, and a coil spring 7 is connected to the top surface of the hole 5 and the flange 61 behind it.
It is compressed to an appropriate amount of deflection between the top surface of the Therefore, the cushion pin 6
is backed up by a coil spring, and the lower surface of the flange 61 is normally pressed against the upper edge surface of the bush 8, with the tip of the front portion 62 protruding most downwardly. When an upward pressure force is applied to the front end of the cushion pin 6, the cushion pin 6
While compressing the coil spring 7 according to the pressure force,
It retreats upward, and when the pressure force is removed, it protrudes forward due to the repulsive force of the spring and returns to its original position. The size, spring characteristics, amount of deflection, etc. of the spring used are set appropriately depending on the loosening (radial expansion) force of the bundled coils and the degree of unevenness of the circumferential surface of the coil supported by the arm. For example, the wire diameter is 1.9 mm, the free length is 36 mm, the total number of turns is 10, the effective number of turns is 8, the spring constant is 7.86 Kg/mm ² , the amount of deflection when installed in the hole is 1 mm, and the maximum amount of deflection is 6 mm. . Furthermore, it goes without saying that the cushion pin needs to have a rigidity that does not easily cause deformation such as bending or buckling when pressed with a pressure force necessary to prevent loosening on the circumferential surface of the coil. For example, SS41 material is used as the material. The dimensions are, for example, the diameter of the front part 62 10 mm, the length of the front part
It is 30mm. In addition, in order to prevent the cushion pin 6 from wobbling in the lateral direction when it advances and retreats in the vertical direction, the peripheral surface of the front portion 61 of the cushion pin can be brought into sliding contact with the inner peripheral surface of the bush 8, thereby giving the bush a guiding function. However, if necessary, it is also effective to provide a slide key groove in the vertical direction on the circumferential surface of the front part 62 of the cushion pin and the inner circumferential surface of the bushing 8, and to insert the slide key in the groove. be.

As mentioned above, the comb-like attachment of the present invention has a cushion pin backed up by a spring at the tip of each protrusion, so if the cushion pin is brought into contact with the coil group with an appropriate pressure force, the sixth
Even if there are irregularities on the circumferential surface of each coil as shown in the figure, a pressure force sufficient to prevent loosening can be applied to each coil.

With conventional comb-like attachments, if you try to bring the protrusions into contact with a large number of coils, the protrusions will be pressed by an excessive pressure force, which tends to cause the protrusions to bend. There is no such fear in the design.

In addition, conventional attachments have drawbacks such as scratches on the coil circumferential surface when brought into contact with the coil circumferential surface, impairing the coil quality, but with the present invention,
Due to the buffering effect of the spring, there is little impact when they come into contact, so there is no such problem at all.

[Brief explanation of the drawing]

Fig. 1 is a front view of main parts showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line A-A, Fig. 3 is a cross-sectional view taken along the line B-B, Fig. 4 is a cross-sectional view taken along the line C-C, and Fig. 5 is a cross-sectional view taken along the line C-C. FIG. 6 is a perspective view showing a state of coil bundling, and is an explanatory view of a state in which a protrusion of a conventional example comes into contact with the circumferential surface of a coil group. 3: Projection piece, 4: Band passage groove, 6: Cushion pin, 7: Coil spring.

Claims (1)

[Scope of utility model registration request] This is a comb-shaped attachment for preventing the coil from loosening in a coil binding device, and is characterized in that a comb pin 6 is attached to the tip of each protrusion 3 forming the comb teeth via a spring 7. Comb attachment for coil binding device.