CN112204188A

CN112204188A - Felt needle

Info

Publication number: CN112204188A
Application number: CN201980035845.5A
Authority: CN
Inventors: 室贺昌浩; 荻原太一; 安藤徹
Original assignee: Organ Needle Co Ltd
Current assignee: Organ Needle Co Ltd
Priority date: 2018-05-29
Filing date: 2019-05-17
Publication date: 2021-01-08
Anticipated expiration: 2039-05-17
Also published as: WO2019230450A1; JP7334981B2; CN112204188B; JPWO2019230450A1

Abstract

Provided is a felt needle which is less likely to deteriorate the fiber holding performance, that is, the fiber interlacing performance, even when the felt needle is used continuously. A felt needle (10) having a barb (20) formed on the surface of a needle body (12), wherein both side surfaces (22) of the barb (20) are formed with a shape that overhangs laterally as it goes toward the upper end. Therefore, the fiber (50) can be held by the side surface (22) of the barb (20) instead of the front surface (21) of the barb (20) as in the conventional art. That is, the fibers (50) can be held without depending on the overhang shape of the front surface (21) of the barb (20) which is most easily worn.

Description

Felt needle

Technical Field

The present invention relates to a fiber-interwoven felt needle for felt products.

Background

As such a felt needle, a felt needle is known in which a plurality of small claws (barbs) are formed by forming notches at the corners of a needle body having a triangular cross section (see, for example, patent document 1). When such a felt is used to perforate a felt material, the barbs capture fibers when the needles are inserted and release the fibers when the needles are pulled out, so that the fibers can be efficiently intertwined.

The barb of the felt needle has a shape of overhang with a projecting tip, and thus, when the felt needle is inserted into the felt material, the fiber can be efficiently replenished.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 7-331575

Disclosure of Invention

Problems to be solved by the invention

However, when such a felt needle is continuously used, there is a problem that the tip of the barb contacting with the fiber is worn and the overhang shape disappears. If the drape shape disappears, the holding property of the fibers is lowered, and hence the interlacing property of the fibers is lowered. As described above, there is a problem that the interlacing performance of the fibers is lowered due to the continuous use of the felt needles.

Accordingly, an object of the present invention is to provide a felt needle in which the retention performance of fibers is not easily lowered, that is, the interlacing performance of fibers is not easily lowered even when the felt needle is continuously used.

Means for solving the problems

The present invention has been made to solve the above-mentioned problems, and is a felt needle having a needle body with a barb formed on a surface thereof, wherein both side surfaces of the barb are formed with overhang shapes that protrude laterally as they extend in an upward direction.

ADVANTAGEOUS EFFECTS OF INVENTION

In the present invention, as described above, the both side surfaces of the barb are formed with overhang shapes that protrude laterally as they go toward the upper end. According to this configuration, even when the fiber is pulled and is about to fall off the barb, the fiber can be suppressed from moving by the overhang shape of both side surfaces. That is, since the fiber can be held by the side surface of the barb, not by the front surface of the barb as in the conventional art, the fiber can be held without depending on the overhang shape of the front surface of the barb which is easily worn. Therefore, the holding performance of the fibers can be stably maintained regardless of the angle change of the front surface of the barb due to abrasion, and therefore, a felt needle in which the interlacing performance of the fibers is not easily lowered even when the felt needle is used for a long time can be provided.

Further, the tip portion of the barb on the needle tip side may be formed perpendicular to the axial direction of the felt needle. In other words, no overhang shape may be provided on the front surface of the barb. According to such a structure, the holding performance of the fiber can be kept constant regardless of the progress of the abrasion of the front surface of the barb. Further, since the holding performance of the fibers is not excessively high, the fibers can be smoothly released from the barbs when the felt needles are pulled out.

Further, a non-overhanging region may be provided at an upper end edge of the side face of the barb. According to such a structure, the height of the overhang shape of the side face of the barb can be adjusted by the non-overhang region. For example, in order to avoid a problem that the holding performance of the fibers is too high and the fibers are not released from the barbs when the felt needles are pulled out, the height of the overhang shape can be intentionally set low so that the fibers are easily detached.

Drawings

Fig. 1 is an external view of a felt needle.

Fig. 2 is an enlarged view of a portion a.

Fig. 3 is an enlarged view of the B portion.

Fig. 4 is a sectional view taken along line C-C.

Fig. 5 is a sectional view taken along line D-D.

Fig. 6 is a sectional view taken along line E-E.

Fig. 7 is a view of fig. 3 as viewed from the direction F.

Fig. 8 is a partially enlarged perspective view of the vicinity of the barb.

Fig. 9 is an enlarged view of the vicinity of the barb, fig. 9 (a) is an explanatory view when the felt needle is inserted into the felt, and fig. 9 (b) is an explanatory view when the felt needle is pulled out from the felt.

Fig. 10 is a partially enlarged perspective view of the vicinity of the barb of modification 1.

Fig. 11 is a partially enlarged side view (corresponding to an enlarged view of part B) of modification 2 in the vicinity of the barb.

Fig. 12 is a sectional view taken along line G-G of modification 2.

Fig. 13 is a sectional view taken along line H-H of modification 2.

Fig. 14 is a partially enlarged perspective view of the vicinity of the barb of modification 3.

Fig. 15 is a partially enlarged side view (corresponding to an enlarged view of part B) of the vicinity of the barb of modification 3.

Fig. 16 is a cross-sectional view taken along line I-I of modification 3.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings.

The felt needle 10 of the present embodiment is used for fiber interlacing of a felt product. As shown in fig. 1, the felt needle 10 includes: a needle bar 11 formed in a substantially L-shape; and a needle body 12 continuous with the tip of the needle shaft 11.

The felt needle 10 is used by being attached to a board, for example. A plurality of mounting holes are formed in the plate to which the felt needles 10 are mounted, the size of the mounting holes being substantially the same as the diameter of the needle bar 11. The felt needle 10 is inserted into the mounting hole and is struck from the needle bar 11 side to press and mount the needle bar 11 into the mounting hole. The plate thus mounted with the plurality of felt needles 10 is reciprocated by a machine. When the felt material is disposed so as to face the reciprocating plate, the tips (needle bodies 12) of the felt needles 10 repeatedly penetrate the felt material. This action causes the felt to be perforated, thereby interlacing the fibers 50.

As shown in fig. 4, the needle body 12 of the present embodiment has a triangular cross section. Specifically, the needle body 12 has a shape in which 3 corners 12a of an R-corner shape are connected by flat side surfaces 12b, and has a chamfered triangular prism shape.

As shown in fig. 2, a plurality of barbs 20 for hooking the fibers 50 are formed on the surface of the needle body 12. Barbs 20 are formed by providing notches 14 at corners 12a of needle body 12, and a plurality of barbs 20 are provided at predetermined intervals at 3 corners 12a of needle body 12.

The barbs 20 are formed in a hook shape, and configured to pull the fibers 50 of the felt material when the felt material is perforated by the felt needles 10. That is, as shown in fig. 9 (a), the barbs 20 catch the fibers 50 and enter the inside of the felt material when the felt needles 10 are inserted into the felt material. Thereby, the fiber 50 is pulled, and the tension of the fiber 50 is performed. Thereafter, as shown in fig. 9 (b), when the felt needle 10 is pulled out from the felt material, the captured fibers 50 are released from the barbs 20. By repeating such operations, the fibers 50 of the felt material can be entangled and tensioned.

Hereinafter, the shape of the barb 20 described above is discussed in detail.

As described above, the barb 20 of the present embodiment is formed by providing the notch 14 at the corner 12a of the needle body 12. As shown in fig. 3 to 8, the notch 14 is formed by cutting the corner 12a of the needle body 12, and includes a bottom surface 15 and an inclined surface 16 continuous with a portion of the bottom surface 15 on the needle tip 29 side. Since the barbs 20 are formed by cutting the corner portions 12a of the needle body 12, the barbs 20 are formed so as not to protrude from the contour line of the needle body 12 when viewed in the axial direction of the felt needle 10.

Bottom surface 15 of notch 14 is formed parallel to the axis of needle body 12. However, the bottom surface 15 is a curved surface parallel to the axis of the needle body 12, and is formed so that the center bulges in the outer circumferential direction of the needle body 12.

The inclined surface 16 of the notch 14 is formed to be inclined with respect to the axis of the needle body 12. The inclined surface 16 is also a curved surface formed so as to bulge out at the center.

Further, the bottom surface 15 and the inclined surface 16 are formed by the bulging curved surface as described above, whereby the edge of the notch portion 14 is eased. By gently forming the edge of the edge portion, the possibility that the fiber 50 is rubbed against the edge and broken is reduced, and therefore, the holding performance of the barb 20 for the fiber 50 is improved.

As shown in fig. 7, the notch 14 of the present embodiment is substantially U-shaped in plan view. Also, the interior of the generally U-shape remains uncut, forming barbs 20. Therefore, the boundary 25 between the notched portion 14 (bottom surface 15) and the barb 20 is substantially U-shaped.

As shown in fig. 7, the front surface 21 of the barb 20 facing the needlepoint 29 has an R-angle shape in plan view, and the side surface 22 continuous with the front surface 21 has a linear shape in plan view. The front surface 21 and the side surfaces 22 on both sides form a rising surface of the barb 20 as shown in fig. 8. In addition, the side surfaces 22 on both sides are connected by the front surface 21 formed by a curved surface. This makes no edge at the boundary between the front surface 21 and the side surface 22, and the fiber 50 is not easily damaged.

As shown in fig. 3, the front surface 21 of the barb 20 of the present embodiment has a shape with a tip that does not overhang. In other words, the tip portion of the barb 20 on the needlepoint 29 side is formed perpendicular to the axial direction of the felt needle 10.

On the other hand, as shown in fig. 5 and 6, the side surface 22 of the barb 20 of the present embodiment is obliquely raised and has a shape of overhang projecting sideward as it goes toward the upper end (upward direction). In other words, the barb 20 is formed to have a larger width above (on the side away from the center of the felt needle 10) than below (on the side closer to the center of the felt needle 10) when viewed in a cross section perpendicular to the axial direction of the felt needle 10.

Specifically, as shown in fig. 5, the width W1 of the both side surfaces 22 at the upper end of the barb 20 is formed larger than the width W2 of the both side surfaces 22 at the lower end of the barb 20. As shown in fig. 6, the width W3 of the side surfaces 22 at the upper end of the barb 20 is greater than the width W4 of the side surfaces 22 at the lower end of the barb 20.

By having such side surfaces 22, the barbs 20 can reliably catch the fibers 50. That is, as shown in fig. 9 (a), the fibers 50 are hooked on the barbs 20 when the felt needles 10 are inserted into the felt material. The fibers 50 hooked on the barbs 20 are restricted from moving upward by the shape of the overhang of the side faces 22 of the barbs 20, and therefore the fibers 50 can be held without being separated upward. When the felt needle 10 is pulled out, the tension that presses the fibers 50 against the barbs 20 is lost, and the fibers 50 are released by falling off the barbs 20.

As described above, the side surface 22 of the barb 20 of the present embodiment has a shape that overhangs laterally as it goes toward the upper end. According to such a configuration, even when the fiber 50 is pulled and is about to fall off the barb 20, the movement of the fiber 50 can be suppressed by the overhang shape of the both side surfaces 22. That is, since the fiber 50 can be held by the side surface 22 of the barb 20 instead of the front surface 21 of the barb 20 as in the conventional art, the fiber 50 can be held without depending on the overhang shape of the front surface 21 of the barb 20 which is easily worn. Therefore, the holding performance of the fibers 50 can be stably maintained regardless of the angle change of the front surface 21 of the barb 20 caused by abrasion, and therefore, the felt needle 10 in which the interlacing performance of the fibers 50 is not easily lowered even when used for a long time can be provided.

The tip of the barb 20 on the needlepoint 29 side is formed perpendicular to the axial direction of the felt needle 10. In other words, no overhang shape is provided at the front surface 21 of the barb 20. According to such a structure, the holding performance of the fiber 50 can be kept constant regardless of the progress of the abrasion of the front surface 21 of the barb 20. Further, since the holding performance of the fibers 50 is not excessively high, the fibers 50 can be smoothly released from the barbs 20 when the felt needle 10 is pulled out.

(modification 1)

In the above embodiment, as shown in fig. 3, the side surface 22 of the barb 20 is provided with the notch 14 to form a hanging shape. The overhang shape is cut halfway along the needle body 12, and is not formed over the entire length of the needle body 12.

However, the needle is not limited to this, and as shown in fig. 10, the needle body 12 may be formed in a shape of a overhang over the entire length thereof.

(modification 2)

In the above-described embodiment, the tip portion of the barb 20 on the needlepoint 29 side is formed so as to be perpendicular to the axial direction of the felt needle 10.

However, the barb 20 is not limited to this, and the tip portion on the needlepoint 29 side may be inclined with respect to the axial direction of the felt needle 10. That is, as shown in fig. 11 to 13, the front surface 21 of the barb 20 may be provided with a hanging shape. The overhang shape of the front surface 21 and the overhang shape of the side surface 22 can be used to further improve the holding performance of the fibers 50.

In the example shown in fig. 10 to 13, as shown in fig. 12, the width W5 of the both side surfaces 22 at the upper end of the barb 20 is formed to be larger than the width W6 of the both side surfaces 22 at the lower end of the barb 20. As shown in fig. 13, the width W7 of the side surfaces 22 at the upper end of the barb 20 is formed to be larger than the width W8 of the side surfaces 22 at the lower end of the barb 20.

With such a configuration, even if the angle changes due to abrasion of the front surface 21 of the barb 20, the holding performance of the fiber 50 can be maintained by the overhang shape of the side surface 22. Thus, the felt needle 10 in which the interlacing performance of the fibers 50 is not easily lowered even when the felt needle is used for a long time can be provided.

(modification 3)

In the above embodiment, among the side surfaces 22 of the barb 20, the whole of the side surface 22 has a hanging shape.

However, without being limited thereto, the non-overhanging region 23 may be provided at the upper end edge of the side face 22 of the barb 20. That is, as shown in fig. 14 to 16, the side surface 22 of the barb 20 may be constituted by an upper non-overhanging region 23 (the side away from the center of the felt needle 10) and a lower overhanging region 24 (the side close to the center of the felt needle 10).

In the non-overhanging region 23, as shown in fig. 16, the width of the both side surfaces 22 is formed to gradually decrease or the width of the both side surfaces 22 does not change as it goes upward (in a direction away from the center of the felt needle 10) when viewed in a cross section perpendicular to the axial direction of the felt needle 10. Therefore, an overhanging shape that suppresses the movement of the fiber 50 is not formed in the non-overhanging region 23.

On the other hand, in the overhang pattern 24, the width of the both side surfaces 22 is formed to be gradually increased as it goes upward (in a direction away from the center of the felt needle 10) when viewed in a cross section perpendicular to the axial direction of the felt needle 10. For example, as shown in fig. 16, the width W9 of the both side faces 22 at the upper end of the overhang region 24 is formed larger than the width W10 of the both side faces 22 at the lower end of the overhang region 24. Therefore, an overhang shape that suppresses the movement of the fibers 50 is formed in the overhang region 24.

As shown in fig. 15 and 16, the non-overhanging region 23 is formed by the side surface 12b of the substantially triangular prism-shaped needle body 12. That is, since the both side surfaces 12b of the substantially triangular prism-shaped needle body 12 are inclined so as to gradually come closer toward the corner 12a, the side surfaces 12b of the needle body 12 may be reflected on the side surfaces 22 of the barbs 20, and the non-suspended region 23 having a narrow tip may be formed. When the non-overhanging region 23 is formed by the shape of the needle body 12 in this manner, the process for forming the non-overhanging region 23 can be omitted. Further, by making the non-overhanging region 23 flush with the side surface 12b of the needle body 12, it is possible to prevent excessive resistance from being generated when the felt needle 10 is inserted.

With this structure, the height of the overhang shape of the side surface 22 of the barb 20 can be adjusted by the non-overhang region 23. By providing the non-overhanging region 23, the height of the overhanging shape can be intentionally set low, and therefore the fiber 50 can be easily detached from the barb 20. This can avoid a problem that the holding performance of the fibers 50 is too high and the fibers 50 are not released from the barbs 20 when the felt needle 10 is pulled out.

The non-overhanging region 23 is not limited to the form formed by the side surface 12b of the needle body 12. For example, the upper end edges of the side surfaces 22 of the barbs 20 may be chamfered to form the non-overhanging regions 23.

Description of the reference numerals

10. A felt needle; 11. a needle bar; 12. a needle body; 12a, a corner portion; 12b, a side surface; 14. a notch portion; 15. a bottom surface; 16. an inclined surface; 20. a barb; 21. a front surface; 22. a side surface; 23. a non-overhanging region; 24. an overhang region; 25. dividing; 29. a needle tip; 50. a fiber.

Claims

1. A felt needle having a barb formed on the surface of a needle body,

both side surfaces of the barb are formed with overhang shapes which protrude sideward as going in the upward direction.

2. The felt needle according to claim 1,

the tip of the barb on the needle tip side is perpendicular to the axial direction of the felt needle.

3. The felt needle according to claim 1 or 2,

a non-overhanging region is provided at the upper edge of the side of the barb.