JP3121320B2 - Multi-needle head and needling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a large number of punching needles (felting needles) are pierced at once in a non-woven material such as a fiber, a filament, a yarn and the like, which is laid on a surface of a base material such as a fabric. The present invention relates to a needling (needle punching) machine for fixing a nonwoven material layer on the surface of a base material in a state in which the nonwoven material is embedded in the base material, and in particular, a multi-needle attached to a needle bar of the needling machine. About the head.

[0002]

2. Description of the Related Art Conventionally, in needle punching,
As a multi-needle head provided with a large number of punch needles in a forest, a needle-shaped pedestal having a cylindrical shape, and a large number of needles pierced in needle-shaped holes formed at the center position of the pedestal surface and at equal intervals around the pedestal surface. 2. Description of the Related Art There is known a punch sewing machine which comprises a punching needle and is configured such that a needle retaining base is attached to a lower end portion of a needle bar of a sewing machine as a needling machine with a retaining screw. Punched needles generally have a base needle shaft for planting against the needle hole in the needle base and a number of barbs from the needle shaft to the needle tip.
And a blade portion having: The needle shaft is fixed to the needle retaining hole by bonding or the like.

[0003]

SUMMARY OF THE INVENTION As a multi-needle head,
In punching, it is desirable to have a large punch area that can punch a large number of points at a time by raising and lowering the needle bar at a stroke, and a narrow interval between adjacent needles. However, in such a case, the number of needles inevitably increases significantly. If one punch needle is broken, the multi-needle head itself must be replaced in its entirety, which leads to an increase in running cost.

As a countermeasure against such breakage of the punch needle, it is conceivable that each punch needle can be replaced by fixing the punch needle to the base with a holding screw. However, even though the needle shaft is thicker than the blade, if the presser screw is pressed against the needle shaft, the space for the screw hole into which the presser screw is screwed in is smaller than when the needle shaft is fixed. Inevitably, the interval between the needles must be increased, and the punch density is reduced, so that much labor is required for the operation, so that the needling productivity is not improved. In particular, there is no space for a screw hole into which a cap screw is screwed for retaining the punch needle at the center of the pedestal.

[0005] In view of the above problems, an object of the present invention is to provide a multi-needle head which has a high pedestal strength or a high density of punch needles, and which can replace punch needles when the punch needle is broken. To provide.

[0006]

Means for Solving the Problems In order to solve the above problems, the means taken by the present invention lies in devising a needle implantation structure of a multi-needle head. That is, the present invention provides a multi-needle head in which a large number of punch needles are implanted on the top surface of the needle holding pedestal and which is to be attached to the tip of the needle bar of the needling machine. It has a needle hole to be inserted, and a lateral screw hole that penetrates the needle holes from the side, and is screwed into the lateral screw hole from the side to be inserted into the needle holes. An embedded screw that abuts the base at the back position from the side in the middle between the bases of the adjacent punch needles, and the needle fastening vertical hole that is screwed into the lateral threaded hole from the side to be closest to the side of the side of the needle fastening vertical hole. And an end screw that comes into contact with the base of the inserted punch needle.

If a horizontal screw hole is provided corresponding to each of the needle fixing vertical holes, the total space of the horizontal screw holes becomes too large, the strength of the pedestal decreases, and the needle fixing from the side to the back side. It is difficult to form a horizontal screw hole for a vertical hole. However, in the present invention, the horizontal screw holes are not formed one-to-one from the side with respect to the needle fastening vertical holes, but the horizontal screw holes that pass through the needle fastening vertical holes are pierced in a skewered shape from the side surfaces. The base of the punch needle on the back side is fixed with an embedded screw, and the base of the punch needle on the side closest to the side is fixed with the end screw, so the total space of the screw hole can be reduced and the pedestal strength Alternatively, it is possible to increase the implantation density of the punch needles by narrowing the needle interval. Moreover, when the punch needle is broken, the punch needle can be replaced.

[0008]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a needling machine according to the present invention, FIG. 2 is a perspective view showing a multi-needle head used in the needling machine, and FIG. 3 is a plan view of the multi-needle head. 4 is an exploded perspective view of the multi-needle head, FIG. 5 is a perspective view showing a multi-needle block used for the multi-needle head, and FIG. 6 is a partially cutaway perspective view of the multi-needle block.

The needling machine 1 of this embodiment uses a sewing machine. At the tip (lower end) of the needle bar 2 of the needling machine 1, a multi-needle head 10 screwed via a mounting bracket 3 is mounted. Needling machine 1
Behind the needle plate 55 of the flat bed 4, there are provided a leading lower roller 7 and an upper roller 8 for leading the base material 6 on the needle plate 5 backward. The lower roller 7 is an idle roller. The upper roller 8 is an active roller. The upper roller 8 can be set up and down by manually raising and lowering the lever 100, so that the upper roller 8 can be pinched and released with the lower roller 8. A pedal (shown) is provided below the body of the needling machine 1. When the pedal is depressed, the upper roller 8 is driven downward by the air cylinder 110, and when the depression is released, the upper roller 8 is raised. It is designed to return. A holding plate 9 is detachably attached to the tip (lower end) of a holding bar (not shown) extending in parallel with the needle bar 2 of the needling machine 1. The pressing plate 9 is a transparent resin plate having a large number of needle through holes. Note that conductive plastic may be used to ground static electricity due to friction with the base material.

The multi-needle head 10 has a multi-needle block 20 in which a large number of punch needles N are implanted in a two-dimensional array on the top surface of a needle retaining base 21, and a plurality of the multi-needle bodies 20 are arranged in a tandem arrangement. It has a multi-needle holder 30 that is detachably held and detachably attached to the tip of the needle bar of the needling machine 1.

The multi-needle holder 30 has two block receiving grooves 31 and 3 for receiving two multi-needle blocks 20 in a cascade.
2 and a fastening screw B for fixing each multi-needle block 20 to the block receiving grooves 31 and 32. The fastening screws B are provided on the upright walls 34, 3 of the holder body 33.
5 are screwed into the screw holes 34a and 35a. The multi-needle holder 30 has a side plate 36 that closes one opening of the block receiving grooves 31 and 32 on the end surface of the holder body 33, and the side plate 36 has an end surface of the multi-needle block 20 in the block receiving groove 32. An offset positioning screw 37 for abutting and positioning is screwed.

The multi-needle block 20 is formed by implanting a large number of punch needles N in a two-dimensional array on the top surface 21a of a substantially rectangular parallelepiped needle holding base 21 made of aluminum. The needle fastening pedestal 21 has a needle fastening vertical hole h into which the base of each punch needle N is inserted, and a horizontal screw hole H which passes from one side surface to the needle fastening vertical holes h in the same row. The multi-needle block 20, lateral threaded hole H in screwed to the needle holder longitudinal hole h in plugged in vertically aligned adjacent the punch needle N, the embedding screw S ₁ in contact with the both in the middle of the base between the N , Horizontal screw hole H
And a endmost screw S ₂ in contact with the base of the plugged punch needle N screwed to the recent side of one side of the needle holder longitudinal hole h in. Therefore, to exchange the punch needle N by unscrewing S ₁ and Embedding endmost screw S _2. A large number of the needle-retaining vertical holes h are arranged in a staggered pattern, not in lattice points.
As shown in FIG. 3, the screw hole H includes a _first screw hole H1 drilled from the first side surface 21b toward the second side surface 21c facing the first side surface 21b, and a first screw hole H1 formed from the second side surface 21c to the first side surface 21b.
Made from the second threaded hole H ₂ Metropolitan drilled toward the first screw hole H ₁ and the second screw hole H ₂ is formed in the adjacent alternately. And the needle fixing vertical hole h is the screw hole H (H ₁ ,
Without terminating in H _2), as shown in FIG. 6, the bottom surface 21
The through hole reaches d.

For example, when performing a needle punching process on a non-woven material 6a superposed on a base material 6 as shown in FIG. 1, a multi-needle head 30 as shown in FIG. Attach to the tip. First, the worker, together with the base material 6,
a is inserted into the gap between the needle plate 5 and the holding plate 9, the leading end of the base material 6 is aligned with the lowering roller 7, and the upper roller 7 is lowered to sandwich the base material 6. When the needling machine 1 is operated, the multi-needle head 10 repeats the ascending and descending movements, and a large number of punch needles N continue to pierce the needle plate 5 through the needle through holes of the holding plate 9, and at the same time, the leading up roller 8 Rotates
The substrate 6 is gradually pulled backward (in the direction of the arrow). Thus, punching is performed on the punch area on the nonwoven material 6a.

In the multi-needle head 10 of the present embodiment, two multi-needle blocks 20 having a large number of punch needles N can be arranged in tandem. The punch width can be changed by selecting the number of the multi-needle blocks 20 to be assembled. for that reason,
The number of times the base material 6 and the nonwoven material 6a are laterally shifted together in the punch width direction can be reduced. For this reason, any area
Even for a nonwoven fabric of a scale, needling can be performed with good workability, and the punch density can be made uniform.

The multi-needle holder 30 has two block accommodating grooves 31 and 32, and the multi-needle block 20 is fixed to each of these by a fastening screw B. The two-dimensional arrangement of the plurality of multi-needle blocks 20 becomes possible, the punch density in one straight movement of the base material 6 and the nonwoven material 6a is improved, and the work efficiency is further improved. The multi-needle block 20
May be used as a multi-needle holder having a long block receiving groove capable of arranging three or more in a row.

In this embodiment, in particular, an offset positioning screw 37 is provided at the end of the block accommodation groove 32, and FIG.
As shown in the figure, the needle position of the multi-needle block 20 in the adjacent block accommodation groove 32 can be adjusted to the intermediate position of the needle interval L of the multi-needle block 20 in the block accommodation groove 31, and the punch pitch is reduced to half of the needle interval L. can do. The number of times the base material 6 and the nonwoven material 6a are laterally shifted together can be reduced,
Work efficiency is greatly improved. When a multi-needle holder having three or more block accommodation grooves is used, a much smaller punch pitch can be obtained.

Since the needling machine 1 of this embodiment is provided with the leading rollers 7 and 8 for leading the substrate 6 on the needle plate 5, the feed speed of the substrate 6 can be kept constant, so that the punch pitch Punch processing can be realized. Also, the holding plate 9
Since the sheet itself is transparent, even if the holding plate 9 is wide, the distribution of the punching can be reliably grasped.

By the way, in the multi-needle block 20, if the screw holes are provided in the respective needle retaining vertical holes h so as to correspond to the side surfaces, the total space of the screw holes becomes too large, and the strength of the pedestal 21 is reduced. Further, it is difficult to form a screw hole from the side surface with respect to the needle fixing vertical hole h on the inner side.
Dimensional alignment is difficult. However, in this example, the horizontal threaded holes H that penetrate with the vertical stitch holes h on the same row are perforated in a skewered manner from one side, and the bases of the adjacent punch needles N on the inner side serve as spacers. since that is adapted to be fixed in an embedded screw S _1, can reduce the total space of the screw holes, the needle interval narrower to 2D alignment of the multi-row multi-column needle is possible. Needle replacement is possible, and punch density is improved.

Further, in this embodiment, since a large number of punch needles N are not arranged in a lattice but in a staggered arrangement, the interval between the needles is narrow and the punch density is improved.

The openings of all the screw holes H of the multi-needle block 20 are not all open on one side,
And the second and screw holes H ₂ which opens into the first screw hole H ₁ and side 21c which opens allocated to adjacent alternately 1b. If all are open on one side, since the partition wall between the adjacent screw holes are thin, embedded screw S ₁ or endmost screw S
_When the screw ₂ is screwed in, the partition wall is deformed by the screwing pressure from both sides, which causes damage to the screw hole and inclination of the punch needle H due to deformation of the needle retaining hole h. On the other hand, as in this example, the side surface 21
When alternately and b and side 21c providing an opening in the screw holes H _1, H _2, screw S ₁ which fit into screw holes H _1, H ₂ adjacent,
S ₂ becomes and each other in a staggered arrangement to each other, hardly occurs the deformation of the partition walls between the holes by screwing pressure, it overcomes the above disadvantages.

The needle fixing vertical hole h in this embodiment is not a blind hole but a through hole. If there are blind holes, it is difficult to make the bottoms of all the blind holes with high precision in terms of manufacturing. However, in the case of a through hole, such a manufacturing difficulty does not occur, and all the needle tips are translated without translation by inserting all the punch needles H into all the needle fixing vertical holes h and aligning the base ends. be able to.

In this embodiment, the hole diameter of the screw hole H is made larger than the hole diameter of the needle fixing vertical hole h. Rectangular pedestal 2
First, after drilling all the needle fixing vertical holes h, the screw holes H are drilled. The drill point does not escape at the portion where the holes meet, and both holes can be manufactured with high precision.

[0024]

As described above, according to the present invention, a lateral screw hole is not formed one-to-one from the side with respect to the needle fixing vertical hole, but a lateral screw hole passing through the needle fixing vertical holes is formed. The hole is pierced in a skewered shape from the side, the base of the punch needle on the back side is fixed with an embedded screw, and the base of the punch needle on the side closest to the side is fixed with the end screw, so the following It has the following effects.

That is, the total space of the screw holes to be formed in the pedestal can be reduced even if the number of the needle fixing vertical holes is large, and the pedestal strength or the interval between the needles can be narrowed and the implantation density of the punch needles can be increased. When the needle is broken, the punch needle can be replaced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a needling machine according to the present invention.

FIG. 2 is a perspective view showing a multi-needle head used in the needling machine.

FIG. 3 is a plan view of the multi-needle head.

FIG. 4 is an exploded perspective view of the same multi-needle head.

FIG. 5 is a perspective view showing a multi-needle block used in the multi-needle head.

FIG. 6 is a partially cutaway perspective view of the multi-needle block.

[Description of Signs] 1 ... Needling machine 2 ... Needle bar 3 ... Mounting bracket 4 ... Flat bed 5 ... Needle plate 6 ... Base material 6a ... Non-woven material 7 ... Pre-rolling lower roller 8 ... Pre-rolling upper roller 9 ... Hold down Plate 10: Multi-needle head 20: Multi-needle block 21: Needle retaining pedestal 21a: Top surface 21b: First side surface 21c: Second side surface 21d: Bottom surface 30: Multi-needle holder 31, 32: Block accommodation groove 33: Holder body 34, 35 ... Standing wall 34a, 35b ... Screw hole 36 ... Side plate 37 ... Offset positioning screw 100 ... Lever 110 ... Air silunda N ... Punch needle B ... Clamping screw h ... Needle fixing vertical hole H ... Horizontal screw hole H ₁ ... first lateral screw holes H ₂ ... second lateral threaded hole S ₁ ... buried screw S ₂ ... endmost screw L ... needle spacing.

Claims (2)

(57) [Claims] 1. A multi-needle head in which a large number of punch needles are implanted on the top surface of a needle holding pedestal and which is to be attached to the tip of a needle bar of a needling machine, wherein the base of each of the punch needles is inserted into the needle holding pedestal. Needle hole, and a lateral threaded hole that penetrates the needle fastening vertical holes from the side surface, and is screwed into the lateral screw hole from the side surface and inserted into the needle fastening vertical holes. An embedded screw that abuts the base located at a depth position from the side in the middle of the bases of the adjacent punch needles, and is inserted into the lateral threaded hole from the side and inserted into the nearest side of the side of the needle fixing vertical hole. A multi-needle head having an outermost screw that abuts the base of the punch needle. 2. A needling machine comprising the multi-needle head defined in claim 1 attached to a tip of a needle bar.