CN112204188B

CN112204188B - Felt needle

Info

Publication number: CN112204188B
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: 2023-07-04
Anticipated expiration: 2039-05-17
Also published as: JP7334981B2; JPWO2019230450A1; WO2019230450A1; CN112204188A

Abstract

Provided is a felt needle which is not likely to be degraded in fiber retention performance even when used continuously, that is, is not likely to be degraded in fiber interweaving performance. A felt needle (10) is provided with barbs (20) on the surface of a needle body (12), wherein overhanging shapes which protrude sideways along with going to the upper end direction are formed on two side surfaces (22) of the barbs (20). 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 prior art. That is, the fiber (50) can be held independent of the overhanging shape of the front surface (21) of the barb (20) that is most susceptible to wear.

Description

Felt needle

Technical Field

The present invention relates to a felt needle for interweaving fibers of 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 in the corners of a needle body having a triangular cross section (see, for example, patent document 1). When such a felt is used to pierce a felt material, the barbs catch the fibers when the needle is inserted and release the fibers when the needle is pulled out, so that the fibers can be efficiently entangled.

The barbs of the felt needle are formed into an overhanging shape with the tips protruding, so that the fibers can be efficiently captured when the felt needle is inserted into the felt material.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open 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 in that the tips of barbs contacting the fibers wear and the overhanging shape disappears. If the overhanging shape disappears, the retention property of the fibers decreases, and thus the interlacing property of the fibers decreases. As described above, there is a problem in that the interweaving performance of the fibers is lowered due to the continuous use of the felt needle.

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

Solution for solving the problem

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a felt needle in which barbs are formed on the surface of a needle body, wherein overhanging shapes protruding sideways with going in the upward direction are formed on both side surfaces of the barbs.

ADVANTAGEOUS EFFECTS OF INVENTION

As described above, the present invention has an overhanging shape protruding laterally with going in the upward direction on both side surfaces of the barb. According to this structure, even when the fiber is pulled and is to be dropped from the barb, the movement of the fiber can be suppressed by the overhanging shape of the both side surfaces. That is, the fiber can be held by the side surface of the barb instead of the front surface of the barb as in the prior art, and therefore, the fiber can be held without depending on the overhanging shape of the front surface of the barb which is liable to wear. Accordingly, the holding performance of the fiber can be stably maintained regardless of the angle change of the barb front surface due to abrasion, and therefore, a felt needle in which the interweaving performance of the fiber is not easily lowered even in the case of continuous use for a long period of time can be provided.

The tip end portion of the barb on the needle tip side may be formed perpendicular to the axial direction of the felt needle. In other words, the overhanging shape may not 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, the holding performance of the fibers is not excessively high, and therefore the fibers can be smoothly separated from the barbs when the felt needle is pulled out.

In addition, a non-overhanging region may be provided at an upper edge of the side surface of the barb. According to such a structure, the height of the overhanging shape of the side face of the barb can be adjusted by using the non-overhanging region. For example, in order to avoid a problem that the holding performance of the fiber is too high and the fiber is not released from the barb when the felt needle is pulled out, the height of the overhanging shape may be set to be low, and the fiber may be easily detached.

Drawings

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

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

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

Fig. 4 is a cross-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 viewed from the direction F.

Fig. 8 is an enlarged partial 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 material, and fig. 9 (b) is an explanatory view when the felt needle is pulled out from the felt material.

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 the portion B) of the vicinity of the barb in modification 2.

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 the portion B) of the vicinity of the barb of modification 3.

Fig. 16 is a 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 felt products. 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 plate, for example. A plurality of mounting holes are formed in a plate to which the felt needle 10 is mounted, the plate having a diameter substantially equal to that of the needle bar 11. The felt needle 10 is inserted into the mounting hole and is struck from the needle bar 11 side, for example, to press the needle bar 11 into the mounting hole and mount it. The plate thus mounted with the plurality of felt needles 10 is reciprocated by a machine. If the felt material is disposed so as to face the reciprocating plate, the tip (needle body 12) of the felt needle 10 repeatedly pierces the felt material. By this operation, the felt is perforated to interweave 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 the R-angle shape are connected by flat side surfaces 12b, and is formed into a chamfered triangular prism shape.

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

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

The shape of the barb 20 described above is discussed in detail below.

As described above, the barb 20 of the present embodiment is formed by providing the notch 14 in 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, as a cutting surface, 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 corners 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.

The bottom surface 15 of the notch 14 is formed parallel to the axis of the 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 that the center thereof bulges.

In addition, the bottom surface 15 and the inclined surface 16 are formed by the curved surface that bulges as described above, and thus the edge of the edge portion of the notch portion 14 is relaxed. By gently forming the edge of the rim, the possibility of the fibers 50 breaking by rubbing against the edge is reduced, and thus the retention of the fibers 50 by the barbs 20 is improved.

As shown in fig. 7, the notch 14 of the present embodiment has a substantially U-shape in plan view. And, the generally U-shaped interior remains unrestrained, thereby 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 needle tip 29 has an R-angle shape in a plan view, and the side surface 22 continuous with the front surface 21 has a straight line shape in a plan view. The rising surface of the barb 20 shown in fig. 8 is formed by the front surface 21 and the side surfaces 22 on both sides. In addition, the side surfaces 22 on both sides are connected by a front surface 21 formed of a curved surface. Thus, there is no edge at the boundary between the front surface 21 and the side surface 22, and the fiber 50 is not easily damaged.

Further, as shown in fig. 3, the front surface 21 of the barb 20 of the present embodiment has a shape in which the tip is not overhanging. In other words, the tip end portion of the barb 20 on the needle tip 29 side is formed perpendicularly 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 inclined and raised, and has an overhanging shape that protrudes laterally with going in the upward direction (upward direction). In other words, the width of the barbs 20 is formed to be larger 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 to be larger than the width W2 of the both side surfaces 22 at the lower end of the barb 20. In addition, as shown in fig. 6, the width W3 of the both side surfaces 22 at the upper end of the barb 20 is formed to be larger than the width W4 of the both side surfaces 22 at the lower end of the barb 20.

By having such sides 22, the barbs 20 are thereby able to reliably capture the fibers 50. That is, as shown in fig. 9 (a), the fibers 50 are caught by the barbs 20 when the felt needle 10 is inserted into the felt material. The fiber 50 hooked to the barb 20 is restrained from upward movement by the overhanging shape of the side 22 of the barb 20, and therefore, can be held without disengaging the fiber 50 upward. When the felt needle 10 is pulled out, the tension pressing the fiber 50 against the barb 20 is lost, and therefore the fiber 50 is released by falling off from the barb 20.

As described above, the side surface 22 of the barb 20 of the present embodiment has an overhanging shape that protrudes laterally as going in the upward direction. According to such a structure, even when the fiber 50 is pulled and is to be dropped from the barb 20, the movement of the fiber 50 can be suppressed by the overhanging shape of the both side surfaces 22. That is, 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 prior art, and therefore, the fiber 50 can be held without depending on the overhanging shape of the front surface 21 of the barb 20 which is liable to wear. Accordingly, the holding performance of the fibers 50 can be stably maintained regardless of the angular change of the front surface 21 of the barb 20 due to abrasion, and therefore, it is possible to provide a felt needle 10 in which the interweaving performance of the fibers 50 is not easily lowered even in the case of continuous use for a long period of time.

The tip end portion of the barb 20 on the needle tip 29 side is formed perpendicularly to the axial direction of the felt needle 10. In other words, no overhanging 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 progress of 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 separated from the barbs 20 when the felt needle 10 is pulled out.

Modification 1

In the above embodiment, as shown in fig. 3, the notched portion 14 is provided on the side surface 22 of the barb 20, thereby forming an overhanging shape. The overhanging shape is cut off in the middle of the needle body 12, and is not formed over the entire length of the needle body 12.

However, the present invention is not limited thereto, and as shown in fig. 10, an overhanging shape may be formed over the entire length of the needle body 12.

Modification 2

In the above embodiment, the tip end portion of the barb 20 on the needle tip 29 side is formed perpendicularly to the axial direction of the felt needle 10.

However, the tip end portion of the barb 20 on the needle tip 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, an overhanging shape may be provided on the front surface 21 of the barb 20. The overhanging shape of the front surface 21 and the overhanging shape of the side surface 22 can be used to further improve the holding performance of the fiber 50.

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

With such a structure, 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 overhanging shape of the side surface 22. Thus, the felt needle 10 in which the interweaving performance of the fibers 50 is not easily degraded even when used continuously for a long period of time can be provided.

Modification 3

In the above embodiment, the entirety of the side surface 22 of the barb 20 has an overhanging shape.

However, not limited thereto, the non-overhanging region 23 may be provided at the upper end edge of the side 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 a non-overhanging region 23 above (on the side away from the center of the felt needle 10) and an overhanging region 24 below (on the side closer 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 gradually reduced or the width of the both side surfaces 22 is not changed as going 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 movement of the fiber 50 is not formed in the non-overhanging region 23.

On the other hand, in the overhanging region 24, the width of the both side surfaces 22 is formed to become gradually larger as going 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 surfaces 22 at the upper end of the overhanging region 24 is formed larger than the width W10 of the both side surfaces 22 at the lower end of the overhanging region 24. Accordingly, an overhanging shape that suppresses movement of the fiber 50 is formed in the overhanging region 24.

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

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

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

Description of the reference numerals

10. A felt needle; 11. a needle bar; 12. a needle body; 12a, corners; 12b, sides; 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 overhanging region; 25. demarcation; 29. a needle tip; 50. and (3) fibers.

Claims

1. A felt needle is characterized in that a barb is formed on the surface of a needle body,

an overhanging shape is formed on both side surfaces of the barb, and on a section perpendicular to the axial direction of the felt needle, the overhanging shape has a demarcation point with the needle body and protrudes sideways along with going to the upper end direction,

the boundary between the overhanging shape and the needle body is a line,

the demarcation is generally U-shaped and has a straight portion parallel to the axial direction of the felt needle.

2. The felt needle according to claim 1, wherein the needle is configured to receive a needle,

the tip end 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, wherein,

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