JP2003053083A - Needle threader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle threader by which threading is easily and smoothly performed for any kind of needle and also which is safely used without adding a useless force to the needle. SOLUTION: The needle threader consists of an erected needle insertion cylinder 3 which is provided with blind needle insertion holes 4 and 5, a formed threading hole 6 which communicates with the center hole 20 of the needle A inserted in a crossing direction with the needle insertion holes 4 and 5 and a thread lock piece 14 in an operation member 11 in connection with a pressurizing member 10. Then the thread B is put through the center hole 20 by the thread lock piece 14. A lower piece 15b is arranged on the end face 15 of the thread lock piece 14 by projecting the lower part and also the end area of the thread lock piece 14 including the lower piece 15b is made to be nearly a slope when the thread B is locked onto the end face 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threader for a needle that allows a thread to be easily threaded through a needle hole of a needle.

[0002]

2. Description of the Related Art Conventionally, a needle threader has a needle insertion hole with a bottom for inserting a needle and a threading hole intersecting with the needle insertion hole. A thin plate-shaped thread locking member that hooks the thread into the hole is provided, and this thread locking member is attached to the operating part that slides inside the main body, and when the operating part is operated, the thread locking member becomes the threading hole. A needle threader capable of threading by inserting and removing is known.

In this case, at the time of operation, when the needle is first inserted into the needle insertion hole and then a force is applied to the operating portion provided on the main body, the tip of the thread locking member which is interlocked with the operating portion is inserted into the needle hole. The thread is inserted, and the thread is locked at the tip of the thread so that the thread is passed through the needle hole. At this time, in order to insert / remove the tip of the thread locking member into / from the needle hole, for example, the needle insertion hole is formed to have a narrow shape in the needle insertion direction, and the needle is inserted into the needle hole. There is a device in which a needle is inserted in the direction of the needle insertion hole when the needle is inserted into the insertion hole in a predetermined direction, and the thread can be threaded in this state.

By the way, if the needle to be inserted is thick or the needle hole has a small diameter, the needle can be inserted only part way into the needle insertion hole, or the needle hole must be set in a predetermined direction. It becomes difficult to insert the thread locking member into the needle hole, and if force is further applied to the operating section in this state, it will not be possible to pass the thread through the needle hole, or the thread locking member When the needle body is in contact, excessive force may be applied, the needle may be bent, or the threader body may be damaged.

For this reason, a notch is provided in a part of the operating portion which is integrated with the thread locking member, and when further force is applied to the operating portion while the thread locking member and the needle are in contact with each other, There is a device in which a force is applied to the notch so that the operating part bends to disperse the force and prevent an unnecessary force from being applied to the needle.

On the other hand, as another means of threading, the second operating body is first operated with respect to the needle inserted into the needle insertion hole, and the protrusion provided at the tip of the second operating body. Through the needle hole to set the needle hole in a predetermined direction, and then, the thread locking member, which is the first operating body, is operated,
There is a device in which the distal end portion of the first operating body is brought into contact with the distal end portion of the second operating body and the second operating body is used as a guide to pass the thread through the needle hole.

[0007]

However, there are many types of needles for silk, cotton, etc., and these needles have extremely large diameters or narrow needle holes, or , The position of the needle hole depends on the type of needle, etc.
It becomes difficult to align the position of the needle hole with the sliding position of the thread locking member. In this case, it is difficult to pass the thread locking member through the needle hole, and it is difficult to thread the thread.

Further, when the thread is locked to these thread locking members, since the thread is folded in two in the traveling direction of the thread locking member and locked, the needle is particularly thin. On the other hand, when threading, the needle hole becomes narrower, and the width of the two-folded thread with the thread locking member becomes larger than the lateral width of the needle hole. Sometimes the thread could not be inserted, or the thread was frayed during the process, making threading impossible.

On the other hand, in the case where the first and second operating bodies are used for threading, when the second operating body is operated, the tip of this operating body may not be reliably inserted. Even if the first operating body is operated in this state, the thread locking member may be caught between the needle insertion hole and the needle.

Moreover, these threading machines have notches in the operating portion, but if a pressing force is continuously applied while the thread locking member is in contact with the needle, this force acts on the operating portion as it is. Since it will continue, it was hard to say that the needle could be used safely because it was bent.

The present invention has been developed as a result of intensive studies in view of conventional circumstances. The object of the present invention is to easily and smoothly thread all kinds of needles. (EN) Provided is a needle threader which can be used safely without applying extra force to the needle.

[0012]

In order to achieve the above object, the invention according to claim 1 erected a needle insertion tube having a bottomed needle insertion hole, and provided in a direction intersecting the needle insertion hole. A thread through hole that communicates with the needle hole of the inserted needle is formed, and a thread locking piece is further provided on the operating member that interlocks with the pressing member, and the thread locking piece thread the thread through the needle hole. In the threading device, a lower piece is provided by projecting a lower portion on the tip surface of the thread locking piece, and when the thread is locked on the tip surface, the tip region of the thread locking piece including the lower piece is substantially It is a threader for needles having an oblique shape.

According to a second aspect of the present invention, a needle insertion tube having a bottomed needle insertion hole is erected, and a threading hole communicating with the needle hole of the needle inserted in a direction intersecting the needle insertion hole is formed. In addition, a thread locking piece is provided on the operating member that interlocks with the pressing member, and in the needle threader for threading the thread through the needle hole with this thread locking piece, the guide portion is projected along the threading hole. The guide is provided with a substantially arcuate taper portion on the insertion side of the thread locking piece, and when the thread locking piece is slid, one side is in close contact with the guide and the thread engaging portion is provided. The needle threader is provided such that the upper surface of the stopper is slightly higher than the upper surface of the guide portion.

According to a third aspect of the present invention, a needle insertion tube having a bottomed needle insertion hole is erected, and a threading hole communicating with a needle hole of a needle inserted in a direction intersecting the needle insertion hole is formed. In addition, a thread locking piece is further provided on the operating member that interlocks with the pressing member, and in the needle threader for threading the thread through the needle hole with this thread locking piece, the thread locking piece is locked to the pressing member and elastically moves upward. A cam plate that is urged to operate in cooperation with the pressing member is provided, and when the pressing member is pressed to the limit position where it can be pressed, the locking between the pressing member and the cam plate is released, and only the cam plate is released. It is a needle threader adapted to be urged upward.

According to a fourth aspect of the present invention, a needle insertion tube having a bottomed needle insertion hole is erected, and a threading hole communicating with the needle hole of the needle inserted in a direction intersecting the needle insertion hole is formed. Further, in the needle threader for threading the thread through the needle hole with the thread locking piece provided on the actuating member interlocking with the pressing member, the protrusion having the guide portion at the thread mounting portion is provided. A threading device for needles, in which a pin insertion portion is provided between the protrusion and the needle insertion tube, and a thread insertion groove for the thread is formed in the needle insertion tube at a position below the pinching insertion portion. .

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a needle threader according to the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which the needle threader of the present invention is disassembled, and 1 (or) 2 in the figure is one of a pair of housings that constitute the main body. Body (split housing 1,
2) is a synthetic resin, for example, a thermoplastic resin such as polyacetal, whose outer shape is formed into a substantially inverted T-shape in cross section, and which is provided with pedestal surfaces 1a and 2a having a substantially rectangular shape at the bottom, and is used for mounting a work desk or the like. It is designed to be stable when placed on a table.

Further, cylindrical needle insertion tubes 3 and 3 for setting the needle A are erected on both sides in the vertical direction. These needle insertion tubes 3 and 3 have bottomed needle insertion holes 4 and 5 having different diameters, for example, a thin needle insertion hole 4 for a silk needle and a thick needle insertion hole 5 for a cotton needle. Are provided with the openings 4a and 5a facing upward, respectively, and a threading hole is provided near the bottom of the needle insertion holes 4 and 5 so as to communicate with the needle hole 20 of the needle A inserted into the needle insertion holes 4 and 5. 6 are formed so as to intersect the needle insertion holes 4 and 5, and are perforated in a gentle arc shape so as to have substantially the same shape as the thread locking piece 14 made of a thin plate provided in an arc shape described later. .

The openings 4a, 5a of the needle insertion holes 4, 5 are formed in a tapered shape so that the needle A can be easily inserted, and the vicinity of the needle hole 20 of the needle A is formed in a flat shape. The bottom portion is formed in a flat shape via a taper portion so that the needle hole 20 of the needle A inserted by utilizing it can easily communicate with the threading hole 6.

The threading hole 6 is formed so that the thread B easily enters and the thread B that has entered does not come out easily. Further, on the inner side surface of the needle insertion tube 3, 3, a slit 4b communicating with the needle insertion hole 4, 5 from the opening of the needle insertion hole 4, 5 to the vicinity of the threading hole 6 near the bottom along the dividing surface. , 5b are provided.

Further, on both sides of the main bodies 1 and 2, a needle insertion tube 3 is provided.
In the vicinity of the entrance of the threading hole 6, a mounting portion 8 for mounting a thread having an acute cross section is formed on the locus along which the thread locking piece 14 moves. The mounting portion 8 is provided between the surfaces of the main bodies 1 and 2 and the outer peripheral surface of the needle insertion tube 3. In particular,
7 and 8, a protrusion 8b having a guide portion 8e is formed on the main body 1 or 2 side of the passage 8a, and a locking groove 8c is formed on the needle insertion tube 3 side of the mounting portion 8, The insertion part of 8b is
The sandwiching insertion portion 8d is formed slightly narrower. The thread B is reliably held in the locking groove 8c from the guide portion 8e through the holding and inserting portion 8d.

On the inner surface of the split housing 1, a pressing member 10 which can be pressed is provided with a projection (not shown), and a pair of guide pieces for guiding the projection are provided so as to project the pressing member 10 on the pedestal surface 1a. In contrast, it is provided so that it can slide in the orthogonal direction. Further, on the inner surface of the other split housing 2, a pair of abutting pieces (not shown) are provided with a proper space therebetween, and these abutting pieces have the same projecting length, and are the same as the above-mentioned guide pieces. The pressing member 10 is clamped so that the pressing member 10 is parallel to the divided surface of the main body, that is, the mounting surface (the pedestal surfaces 1a, 2).
It has a function of sliding vertically to a).

An actuating member 11 made of synthetic resin is rotatably supported by a shaft 1c provided on both sides of the split housing 1 so as to project toward the inner surface side. Is provided with a thread locking piece 14 for inserting the thread B into the needle hole 20 and threading the thread.

The thread locking piece 14 is a metal plate thinner than the lateral width of the needle hole 20, and is made of, for example, a stainless steel plate in the shape of a sickle, and the thread passing hole 6 described above is used. The distal end portion of the thread locking piece 14 inserted into the thread locking portion 14 is thinner than the vertical width of the needle hole 20 and is formed in a substantially arc shape according to the rotation locus of the thread locking piece 14. A lower piece 15a is formed so as to project from the upper piece 15a on the tip surface 15 of the thread locking piece 14 having a substantially U shape, and when the thread B is locked to the tip surface 15, the upper piece 15a and the lower piece 15a. It can be locked so as to fill the groove-shaped portion between 15b and 15b, and can have a substantially oblique shape having an angle θ as shown in FIG.

In FIG. 5, reference numeral 22 denotes a guide portion formed by projecting along the threading hole 6, and a substantially arc-shaped tapered portion 22a is provided on the guide portion 22 on the insertion side of the thread locking piece 14. It is provided. The thread locking piece 14 is provided such that one side surface thereof comes into close contact with the guide portion 22 when sliding, and the upper surface 14a is slightly higher than the upper surface 22b of the guide portion 22 at this time.

Reference numeral 30 is a cam plate, and this cam plate 30 is
It has a locking portion 30a formed of a synthetic resin having strength and protruding from the central portion, and an operating portion 30b for operating the operating member 11. The acting portion 30b is the cam plate 3
It is formed so that it bends from the main body to a U shape.
A cutout portion 30d is provided at this bent portion. Further, the action portions 30b and 30b are provided with elongated holes 30c and 30c, respectively, which have a substantially inverted V-shape. The cam plate 3
0 is made of a polyacetal resin containing a glass material or the like to have elasticity, but spring steel can also be used.

Reference numeral 11a is a projection provided so as to project from the actuating member 11, and the projections 11a, 11a are provided in the elongated hole 3
Attach the operating member 11 in the state of being inserted into 0c and 30c,
When the cam plate 30 is moved up and down, the respective operating members 11, 11 are configured to be rotatable about the shaft 1c in conjunction with the up and down movement of the elongated hole 30c. At the lower end of the cam plate 30,
The coil spring 12 is provided between the housing 1 and the housing 2 so that the cam plate 30 elastically biases upward, and the cam plate 30 is normally biased upwardly in the normal state.
Along with this, the actuating members 11, 11 maintain the state of being turned inward.

The pressing member 10 is made of synthetic resin or the like, and the stopper piece 31 is made of synthetic resin having elasticity inside.
Are fixed by screwing means such as a screw 31a. The stopper piece 31 is formed by cutting out a long plate spring portion 31b and a part of the plate spring portion 31b so that the stopper piece 31 can be locked from the upper end surface side of the locking portion 30a of the cam plate 30. When the pressing member 10 is pressed by providing the stopper portion 31c, the pressing member 10 and the cam plate 30 are integrally moved downward in order to keep the stopper portion 31c locked to the locking portion 30a.

Reference numeral 32 denotes a spring. One end of the spring 32 is hooked on a projecting protrusion 10a provided on the lower portion of the pressing member 10, and the other end is hooked inside the main body 1 or 2. The pressing member 10 is urged to move upward. Therefore, the cam plate 30 and the pressing member 10 are the coil spring 1
2. The spring 32 independently biases upward by the spring 32. Normally, however, the locking portion 30a of the cam plate 30 is locked to the stopper portion 31c of the stopper piece 31, so that the pressing member is pressed. The cam plate 10 and the cam plate 30 are integrally pushed up.

Reference numeral 1f is a convex portion provided so as to project inward from the main bodies 1 and 2, and is provided so that the taper portion 31d provided on the stopper piece 31 can come into contact when the pressing member 10 is pressed. When the pressing member 10 is pressed to the limit position where it can be pressed and the tapered portion 31d comes into contact with the pressing member 10, the cam plate 30 and the pressing member 10 are disengaged, and only the cam plate 30 is biased upward.

In this embodiment, the needle insertion holes 3 are provided at two locations so that the two needles A can be threaded at one time. However, the needle insertion holes 3 may be provided at one location. . If necessary, blades (not shown) may be provided on the main bodies 1 and 2, for example, by providing them on the upper portions of the main bodies 1 and 2, and forming a substantially L-shaped groove-shaped portion so as to communicate with the cut surface of the blades. For example, the thread B can be safely cut by passing the thread B through the groove-shaped portion.

Next, the operation of the above embodiment will be described. When threading the needle hole 20, first, as shown in FIG. 8, the needle A is inserted into the needle insertion holes 4 and 5, and the thread B is securely placed in the placing portion 8 in a sandwiched state. . Next, when the pressing member 10 is pushed down against the elastic force of the coil spring 12 provided at the lower portion of the cam plate 30, the actuating members 11, 11 interlocking with the cam plate 30 move outwardly around the shaft 1c. Then, the thread B set on the placing portion 8 is locked by the front end surface 15 of the thread locking piece 14 and drawn into the threading hole 6 for threading.

At this time, as shown in FIG. 4, the thread locking piece 13 is inserted into the needle hole 20 from the lower piece 15b side, and further,
When the thread locking piece 14 is slid, the tip B side of the thread locking piece 14 that locks the thread B has a substantially oblique shape with an angle θ, so that the thread B comes into contact with the needle A. The needle A can be lifted up and threaded while buffering at the site. Therefore, the diameter of the needle A is large relative to the needle insertion hole 4 (or 5), and the needle hole 20 slides on the thread locking piece 14. The thread can be threaded even when it is displaced from the moving position, and the needle hole 20 of the needle A
If the length of the head part is different, or if the diameter of the thin needle is different and it is a thin needle, or if the needle hole of the needle is deformed or it is extremely small, thread it You can When the needle A is lifted up by the thread locking piece 14, the portion where the needle A is placed becomes a space.

Since the guide portion 22 is formed along the threading hole 6, threading can be performed even when the needle A is thin and the needle hole 20 is narrow. As shown in FIG. 5, when the needle A is inserted into the needle insertion hole 4 (or 5), and the pressing member 10 is pressed to slide the thread locking piece 14, the thread B moves to the tip of the thread locking piece 14. It slides while being locked to the surface 15, and in this state, the guide portion 2
When it approaches 2, the one side of the folded yarn B is pushed up to the upper surface side of the guide portion 22 by the tapered portion 22a. Further, when the thread locking piece 14 slides, one side of the thread B pushed up moves in close contact with one side surface of the thread locking piece 14, and the other side of the thread B moves to the thread locking piece. Since it enters the needle hole 20 in a state of being divided on the upper surface side of 14, the thread B can be easily inserted into the needle hole 20 even if the width of the needle hole 20 is narrow, and the thread is prevented from fraying. be able to.

On the other hand, when the needle A has a large diameter and cannot be inserted into the needle insertion hole 5, it can be safely used. For example, when the thread locking piece 14 comes into contact with the needle A when the pressing member 10 is pushed down, when the pressing member 10 is further pressed in this state, the operating members 11, 11 try to rotate. Since A interferes with the threading hole 6, the thread locking piece 14 cannot be inserted and the operating member 11 cannot slide.

When further pressing force is applied in this state, the cam plate 30 can be pressed because it tries to be applied to the contact surface between the stopper portion 31c of the stopper piece 31 and the locking portion 30a of the cam plate 30. When reaching the lowest position, the inclined surface portion 31d provided on the stopper piece 31 comes into contact with the convex portion 1b of the main body, the inclined surface portion 31d slides along the convex portion 1b, and the leaf spring portion 31b becomes elastic. Warping against, locking portion 30a
And the stopper portion 31c are disengaged.

Therefore, the engagement between the cam plate 30 and the stopper piece 31 is released, and only the pressing member 10 moves downward, so that the cam plate 30 does not continue to move downward, but is urged upward by the spring 12. Further, no unnecessary force is applied to the needle A, the thread locking piece 14, etc., and there is no possibility that the needle A is broken or the thread locking piece 14 is bent and the main body breaks down.

The pressing force when pressing the pressing member is
Although it is also applied to the contact portion between the protrusion 11a and the elongated hole 30c, since the cutout portion 30d is provided, a force is applied in the direction of bending the action portion 30b in the bending direction, and the force can be dispersed.

The diameters of the needle insertion holes 4 and 5 formed in the needle insertion cylinder 3 may be different or the same, and the pressing member 10 is pressed while threading on either side is difficult. Even if it is continued, since the above-mentioned action works similarly, the pressing force is relieved, and the pressing force does not continue to be applied to the thread locking piece 14 and the needle A.

[0039]

As is apparent from the above, the needle threader of the present invention allows threading while moving the position of the needle hole for each needle during threading. Various types of needles, thin or short needles, different head lengths, small needle holes, or other types of needles can be used easily and reliably. It was possible to get through all the problems and solve all the problems in the past.

Further, the threading device for a needle is capable of threading even when the needle hole is narrow, and the thread is not frayed or broken even when the thread diameter used is large. It is possible to thread easily.

Further, when threading is difficult, the force does not continue to be applied to the inside of the main body even if a pressing force is applied, and the thread locking piece is damaged during use and cannot be reused. It can be used safely without any problems.

[Brief description of drawings]

FIG. 1 is an exploded front view showing an internal state of an embodiment of a needle threader of the present invention.

FIG. 2 is an explanatory diagram showing an operating state of a thread locking piece.

FIG. 3 is a partially enlarged view of the thread locking piece.

FIG. 4 is an explanatory diagram showing an operating state of the thread locking piece.

FIG. 5 is a partially enlarged explanatory view showing the vicinity of a guide portion.

FIG. 6 is an enlarged front view of FIG.

FIG. 7 is a partially enlarged view of the needle insertion tube.

FIG. 8 is a partially cutaway enlarged perspective view of the needle insertion tube.

FIG. 9 is an exploded perspective view showing an internal state of an embodiment of the needle threader.

10 is a partially enlarged view of FIG.

11 is a partially enlarged view of FIG.

[Explanation of symbols]

3-needle insertion tube 4, 5 needle insertion hole 6 threading hole 8b protrusion 8c locking groove 8d clamping insert 8e Guide 10 Pressing member 11 Actuating member 14 Thread locking piece 14a upper surface 15 Tip surface 15a Upper piece 15b lower piece 20 needle holes 22 Information 22a taper part 22b upper surface 30 cam plate A needle B thread

Claims (4)

[Claims] 1. A needle insertion tube having a bottomed needle insertion hole is provided upright, a threading hole communicating with a needle hole of a needle inserted in a direction intersecting the needle insertion hole is formed, and a pressing member is further provided. In the needle threader for threading the thread through the needle hole with the thread locking piece provided on the operating member interlocked with the thread locking piece, the lower part is projected to the tip end surface of the thread locking piece. A needle threader, characterized in that a tip is provided with a piece, and when the thread is locked on the tip end surface, the tip end region of the thread locking piece including the lower piece has a substantially oblique shape. 2. A needle insertion tube having a bottomed needle insertion hole is provided upright, a threading hole communicating with a needle hole of a needle inserted in a direction intersecting with the needle insertion hole is formed, and a pressing member is further provided. A thread locking piece is provided on the operating member interlocked with, and in the needle threader for threading the thread through the needle hole with the thread locking piece, a guide portion is provided protruding along the threading hole. A substantially arc-shaped taper is provided on the guide part on the side where the thread locking piece is inserted. When the thread locking piece slides, one side comes in close contact with this guide and the upper surface of the thread locking piece guides. A needle threader characterized by being provided so as to be slightly higher than the upper surface of the portion. 3. A needle insertion tube having a bottomed needle insertion hole is erected, a threading hole communicating with a needle hole of a needle inserted in a direction intersecting the needle insertion hole is formed, and a pressing member is further provided. In the threading device for the needle, which is provided with a thread locking piece on the operating member which interlocks with the thread locking thread, thread the thread through the needle hole with the thread locking piece. A cam plate that is operable in conjunction with the pressing member is provided, and when the pressing member is pressed to the limit position where it can be pressed, the locking between the pressing member and the cam plate is released,
A needle threader characterized in that only the cam plate is biased upward. 4. A needle insertion tube having a bottomed needle insertion hole is provided upright, a threading hole communicating with a needle hole of a needle inserted in a direction intersecting the needle insertion hole is formed, and a pressing member is further provided. A thread locking piece is provided on an operating member that is interlocked with, and a threading device for threading the thread through the needle hole with the thread locking piece is provided with a protrusion having a guide portion on the thread mounting portion. A threading device for needles, characterized in that a pinching insertion portion is formed between the portion and the needle insertion tube, and a thread locking groove for thread is formed in the needle insertion tube at a position below the pinching insertion portion.