JP4294403B2 - Threading device for hand-sewn needles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a threading device for hand-sewn needles.
[0002]
[Prior art]
Many types of threading devices for hand-sewn needles have been developed in recent years.
[0003]
For example, as a first conventional example, there is one in which a thread is passed through a needle hole by pushing a hook hooked with the thread through the needle hole and pushing it out. In addition, as a second conventional example, there is one in which an upward hook is passed through a needle hole in advance, and then the thread is passed through the needle hole by hooking the thread onto the hook and then pulling the hook out of the needle hole ( For example, see Patent Documents 1 and 2).
[0004]
[Patent Document 1]
US Pat. No. 2,338,159 [Patent Document 2]
US Pat. No. 2,507,370
[Problems to be solved by the invention]
However, in the first conventional example, if the needle hole is too small for the hook or if the thread thickness is too thick for the needle hole, the load on the hook during threading is large and the hook is bent. There was a problem that it breaks or breaks.
[0006]
In the second conventional example, the above-described burden is small. However, since the hook is pulled out from the needle hole after the thread is hooked on the upward hook, the shape of the hook is used to securely hook the thread onto the hook. Needed to be in the shape of a key needle. Therefore, it is difficult to remove the thread from the hook after the hook is pulled out from the needle hole, and there is a problem that the hook is bent or broken when the thread is forcibly removed from the hook.
[0007]
An object of the present invention is to provide a threading device for a hand-sewn needle that can prevent breakage of a hook portion used when threading a needle hole.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a threading device for a hand-sewn needle according to claim 1, wherein a needle receiving portion for receiving a hand-sewn needle with its needle hole on the lower side, a hook portion having a downward hook at its tip, A hook portion that moves the hook portion so as to reciprocate between a retracted position in which the downward hook is retracted and a protruding position in which the downward hook protrudes through a needle hole of a hand-sewn needle received in the needle receiving portion. Moving means and disposed under the downward hook at the protruding position to support the thread, and when the downward hook moves to the protruding position, the downward hook hooks the thread downward and a thread support portion to pass to the hook, the thread support portion, not the downward hook is configured to move upward toward said downward hook when moved to the projecting position It is characterized in.
[0010]
The threading device for a hand-sewn needle according to claim 2 is the threading device for a hand-sewn needle according to claim 1 , wherein the thread support portion straddles the downward hook at an upper end thereof, and the thread is passed through the hook portion. It has a bifurcated portion that is supported at right angles to the longitudinal direction and horizontally.
[0011]
The threading device for hand-sewn needles according to claim 3 , wherein the threading device for hand-sewn needles according to claim 1 or 2 , wherein the hook portion is the downward hook when the hook portion moves toward the protruding position. It is characterized by having a buffer part for making the load concerning it into below a fixed value.
[0012]
The threading device for a hand-sewn needle according to claim 4 is the threading device for a hand-sewn needle according to any one of claims 1 to 3 , wherein the hook portion moves toward the retracted position. In this case, another shock-absorbing unit is provided for making the load applied to the downward hook when the load is applied to a predetermined value or less.
[0013]
The threading device for a hand-sewn needle according to claim 5 is the threading device for a hand-sewn needle according to any one of claims 1 to 4 , wherein after the downward hook is moved to the retracted position, the downward hook is Hook part returning means for returning the hook part so as to be located at an initial position between the retracted position and the hand stitched needle received by the needle receiving part; and hand stitching received by the retracted position and the needle receiving part. A thread that is arranged above the downward hook between the needle hole of the needle and moves downward to push down the thread hooked on the downward hook when the hook portion moves from the retracted position to the initial position. It has a removal part.
[0014]
The threading device for a hand-sewn needle according to claim 6 is the threading device for a hand-sewn needle according to claim 5 , further comprising a plate-like member wider than the downward hook.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
In FIG. 1, a threading device 1 for a hand-sewn needle is provided with a plastic box-shaped housing 2 that is long in the horizontal direction and flat in a vertical plane, and a bed 3 formed at the bottom of the housing 2. On the other hand, the hand-sewn needle 70 has a needle hole 70a at the rear end.
[0017]
On one end side of the housing 2 (right side in FIG. 1), an operation rod 4 described later is mounted. The operation rod 4 has an operation knob 4a at one end thereof.
[0018]
On the other end side (the left side in FIG. 1) of the housing 2, a hand-sewn needle insertion hole 5 (needle receiving portion) is provided on the upper portion thereof in a vertically downward direction. The hand-sewn needle insertion hole 5 has a bell mouth-shaped inlet 5a and receives the hand-sewn needle 70 with the needle hole 70a facing downward. Further, on the other end side of the housing 2, a thread insertion slit 6 is provided vertically downward adjacent to the other end side of the housing 2 with respect to the hand sewing needle insertion hole 5. The thread insertion slit 6 receives the thread 71 passed through the needle hole 70 a of the hand-sewn needle 70 horizontally and perpendicularly to the longitudinal direction of the housing 2.
[0019]
On one end side of the housing 2, a cutter 68 for cutting the yarn 71 is provided on the upper portion thereof.
[0020]
FIG. 2 is a cross-sectional view of the threading device 1 for hand-sewn needles of FIG. 1 in an initial state.
[0021]
In FIG. 2, the housing 2 has a stepped rectangular tube portion 12 that extends in the longitudinal direction of the housing 2 toward the other end side of the housing 2, with one end portion of the housing 2 as a base end in the center portion in the height direction. The rectangular tube portion 12 has a hollow portion 13 therein. Regarding the outer cross-sectional dimensions of the rectangular tube portion 12, the horizontal width is constant, but the vertical width is smaller at the distal end than at the proximal end. Similarly, as for the cross-sectional dimension of the hollow portion 13 of the square tube portion 12, the horizontal width is constant, but the vertical width is smaller at the distal end than at the proximal end. Longitudinal recesses 13 a and 13 b are formed at the center in the longitudinal direction of the cavity 13 on the upper side and the lower side, respectively.
[0022]
The rectangular tube portion 12 has an opening 16 in the upper part on the proximal side facing the longitudinal recess 13a and a notch 17 in the lower part on the distal end facing the longitudinal recess 13b at the center in the longitudinal direction. ing.
[0023]
In the hollow portion 13 of the square tube portion 12, a square tube-shaped slide portion 20 is accommodated. The outer shape of the slide part 20 is complementary to the shape of the cavity part 13 so that the slide part 20 can slide in the longitudinal axis direction of the square cylinder part 12 in the cavity part 13, and one end part of the slide part 20 is a square cylinder. While it fits with the cavity part 13 in the front end side of the part 12, the other end part of the slide part 20 is the reverse. The slide part 20 does not rotate around the longitudinal axis of the square cylinder part 12.
[0024]
A projecting portion 21 that fits into the longitudinal recess 13a is formed on the upper side of the longitudinal center of the slide portion 20, and a projecting portion 22 that fits into the longitudinal recess 13b is located below the center of the longitudinal direction. Is formed to face the protruding portion 21. Thereby, as for the slide part 20, the slide range of the longitudinal direction is controlled.
[0025]
The projecting portion 22 is formed with an inclined protrusion 23 inclined toward the other end of the housing 2 on the distal end side of the rectangular tube portion 12, and the inclined protrusion 23 is fitted into the notch portion 17 of the rectangular tube portion 12. Yes.
[0026]
A compression spring 25 (hook part returning means) that biases the slide part 20 toward one end side is mounted between the other end part of the slide part 20 and the bottom part of the cavity part 13. On the other hand, a leaf spring 24 that engages with the inclined protrusion 23 is attached to the lower side of the rectangular tube portion 12, and the inclined protrusion 23 is latched by the leaf spring 24. Thereby, the initial position of the slide part 20 with respect to the square cylinder part 12 is prescribed | regulated.
[0027]
The slide portion 20 has a square columnar cavity 27 oriented in the vertical direction at the center in the longitudinal direction, a square columnar cavity 28 oriented in the longitudinal direction at one end thereof, and a square columnar shape oriented in the longitudinal direction at the other end. Each has a hollow portion 29.
[0028]
In the hollow portion 28 of the slide portion 20, a hook portion 31 having a downward hook 30 oriented at the other end of the housing 2 at the tip is slidably accommodated in the longitudinal direction of the slide portion 20. The sliding range of the hook portion 31 is restricted so as to stop at the maximum projecting position in the cavity portion 28. Between the base end of the hook part 31 and the bottom part of the cavity part 28, the compression spring 32 (buffer part) which urges | biases the hook part 31 toward the front end side is mounted | worn. Thereby, the hook part 31 is normally positioned at the maximum projecting position, and when the movement of the downward hook 30 to the other end side of the housing 2 is obstructed, the downward hook 30 can be prevented from being damaged. it can. As shown in FIG. 2, when the hand-sewing threading device 1 is in the initial state, the downward hook 30 is positioned in the immediate vicinity of the hand-sewn needle insertion hole 5 on one end side of the housing 2.
[0029]
The downward hook 30 is offset slightly above the longitudinal axis of the rectangular tube portion 12. Further, a thread lifting cam portion 33 described later projects from one end portion of the slide portion 20. The thread lifting cam portion 33 has a thread lifting cam 33a inclined on the other end side of the housing 2 on the upper surface thereof.
[0030]
In the hollow portion 29 of the slide portion 20, the other end side of the operation rod 4 having the operation knob 4 a at one end is received so as to be slidable in the longitudinal direction of the slide portion 20. The slide range of the operating rod 4 is restricted so as to stop at the maximum projecting position in the hollow portion 29. The other end of the operation rod 4 is urged toward one end of the slide portion 20 by a compression spring 52 (another buffer portion) mounted in the cavity portion 29. As a result, the other end of the operation rod 4 is normally in contact with the bottom of the cavity 29.
[0031]
On the other hand, the spring constant of the compression spring 52 is larger than that of the compression spring 25. Therefore, when the operation knob 4 a is pulled toward one end of the housing 2, first, the compression spring 25 contracts and the slide portion 20 moves toward one end of the housing 2, and the projecting portions 21 and 22 become one end of the housing 2. After contacting the longitudinal grooves 13a, 13b on the side, the compression spring 52 contracts. Thereby, when the movement of the downward hook 30 to the one end side of the housing 2 is obstructed, the downward hook 30 can be prevented from being damaged.
[0032]
An arm cam pin 60 whose upper surface is inclined toward the other end of the housing 2 is accommodated in the hollow portion 27 of the slide portion 20 so as to be slidable in the vertical direction. The slide range of the arm cam pin 60 is regulated so as to stop at the maximum projecting position in the hollow portion 27. A compression spring 61 is mounted between the lower end of the arm cam pin 60 and the bottom of the cavity 27 to urge the arm cam pin 60 upward.
[0033]
Further, in the housing 2, a substantially inverted U-shaped arm 62 (thread removal part) is disposed around the fulcrum 63 so as to be swingable above the rectangular tube part 12. One end of the arm 62 is urged clockwise by a tension spring 64 in FIG. 2, and its rotation is restricted by a stopper pin 63a. One end of the arm 62 is positioned above the downward hook 30 at the restriction position, and the other end is fitted into the opening 16 on the distal end side of the rectangular tube portion 12. The width of one end of the arm 62 is larger than the width of the downward hook 30 (FIGS. 3 and 9). Since the thread 71 hooked on the downward hook 30 is connected from both sides of the downward hook 30 to the needle hole 70a, the width of one end of the arm 62 is at least larger than the width of the downward hook 30 as shown in FIG. The thread 71 hooked on the downward hook 30 can be reliably removed.
[0034]
The other end side of the housing 2 has a longitudinal hole 40 provided coaxially with the hook portion 31 to receive the downward hook 30 of the hook portion 31, and a thread provided at one end of the slide portion 20 on the lower side thereof. A longitudinal hole 41 provided coaxially with the yarn lifting cam portion 33 to receive the lifting cam portion 33 is provided.
[0035]
The hand-sewn needle insertion hole 5 provided in the upper part on the other end side of the housing 2 reaches the longitudinal hole 42. Thus, the hand-sewn needle insertion hole 5 rotates the hand-sewn needle 70 so that the needle hole 70a faces the downward hook 30 when the hand-sewn needle insertion hole 5 receives the hand-sewn needle 70 with the needle hole 70a facing downward. It is shaped like a taper.
[0036]
On the other hand, the other end of the housing 2 has a vertical hole 66a below the thread insertion slit 6, and a thread support part 67 having a bifurcated part 67a at the upper end is vertically aligned in the vertical hole 66a. It is slidably accommodated. The thread support portion 67 is positioned such that the forked portion 67a straddles the downward hook 30 and a relief 80 is provided between the forked portion 67a (FIG. 4). Accordingly, even when the yarn support portion 67 is lifted by the yarn lifting cam portion 33, the hook portion 31 can be smoothly slid.
[0037]
The positions of the longitudinal recesses 13a and 13b of the rectangular tube portion 12 and the projecting portions 21 and 22 of the slide portion 20 indicate the sliding range of the slide portion 20, and the downward hook 30 is more housing than the initial position shown in FIG. 2 and a retracted position where the downward hook 30 is positioned above the forked portion 67a of the thread support portion 27 through the needle hole 70a of the hand sewing needle 70 received in the hand sewing needle insertion hole 5 from the initial position. Each is set so as to be defined by the protruding position.
[0038]
The thread support part 67 has a hole 69 through which the thread lifting cam part 33 penetrates at the center in the vertical direction, the slide part 20 moves to the other end side of the housing 2, and the downward hook 30 reaches the protruding position. When this is done, the yarn lifting cam 33a is configured to fit into the hole 69.
[0039]
Hereinafter, the operation of the threading device 1 for the hand-sewn needle of FIG. 1 will be described.
[0040]
(1) Initial state (Fig. 2)
First, in the initial state of FIG. 2, when the hand-sewn needle 70 is inserted into the hand-sewn needle insertion hole 5 with its needle hole 70 a facing down, the hand-sewn needle 70 is attached to the downward hook 30 within the longitudinal hole 40. Rotate to face each other.
[0041]
Next, when the thread 71 is inserted into the thread insertion slit 6, the thread 71 is oriented horizontally at the position of the longitudinal hole 42 and orthogonal to the longitudinal direction of the housing 2, and then the forked portion 67 a of the thread support portion 67. Arranged on top of.
[0042]
(2) Threading state (Fig. 5)
In the initial state of FIG. 2, when the operation knob 4 a is pushed to the other end side (A direction in FIG. 5) of the housing 2, the slide portion 20 slides to the other end side of the housing 2. The leaf spring 24 is released by the action, and the protrusions 21 and 22 are in contact with the longitudinal recesses 13a and 13b on the other end side of the housing 2, and the downward hook 30 is inserted into the hand sewing needle insertion hole 5. The needle reaches the protruding position located on the thread support portion 67 that supports the thread 71 through the needle hole 70a of the hand-sewn needle 70. At this time, since the downward hook 30 moves to the protruding position through the needle hole 70a in a state where the thread 71 is not caught, the downward hook 30 can be smoothly passed through the needle hole 70a, and the hook portion 31 is bent, It can be prevented from being broken and broken.
[0043]
At the same time, when the yarn lifting cam portion 33 passes through the hole 69 of the yarn supporting portion 67, the yarn supporting portion 67 is lifted upward by the action of the yarn lifting cam 33a. The thread 71 arranged on the hook is engaged with the downward hook 30 (FIG. 7). Thereby, the thread | yarn 71 can be hooked on the downward hook 30 reliably.
[0044]
When the slide portion 20 slides to the other end of the housing 2, the size of the needle hole 70a of the hand-sewn needle 70 is smaller than the size of the downward hook 30, or the hand-sewn needle 70 is hand-sewn with the insertion direction reversed. When the downward hook 30 does not enter the needle hole 70a of the hand-sewn needle 70 as in the case where it is inserted into the needle insertion hole 5, the compression spring 32 in the cavity portion 28 of the slide portion 20 contracts, so that the hook portion 31 It is possible to reduce the applied load and prevent the hook portion 31 from being bent or broken and broken.
[0045]
(3) Thread withdrawal state (Fig. 6)
When the operation knob 4a is pulled to one end side (the B direction in FIG. 6) of the housing 2 from the threading state of FIG. 5, the slide portion 20 slides to one end side of the housing 2, and the downward hook 30 causes the thread 71 to move. The hook 21 is pulled out from the needle hole 70 a of the hand-sewn needle 70 while being hooked, the projecting portions 21 and 22 abut on the longitudinal recesses 13 a and 13 b on one end side of the housing 2, and the downward hook 30 is inserted into the hand-sewn needle insertion hole 5. The retracted position is reached through the needle hole 70a of the hand-sewn needle 70 thus made. At the same time, the arm cam pin 60 in the cavity portion 27 of the slide portion 20 is fitted into the opening portion 16 by the action of the compression spring 61, and the yarn lifting cam portion 30 is pulled out from the hole 69 of the yarn support portion 67. Thus, the yarn support portion 67 is lowered downward by the action of the yarn lifting cam 33a.
[0046]
When the downward hook 30 is slid toward the retracted position as described above, the downward hook 30 is threaded as if the thread 71 is thicker than the needle hole 70a of the hand-sewn needle 70. When the hooked portion 70 cannot be pulled out smoothly from the needle hole 70a of the hand-sewn needle 70, the compression spring 52 in the hollow portion 29 of the slide portion 20 is contracted to reduce the load applied to the hook portion 31, thereby reducing the hook portion. It is possible to prevent the 31 from being damaged by bending or breaking.
[0047]
(4) Thread removal state (Fig. 8)
When the slide portion 20 and the operation knob 4a are slid to the other end side (direction C in FIG. 8) of the housing 2 by the action of the compression spring 25 from the thread drawing state of FIG. 6, and return to the initial state of FIG. The following thread removal operation is performed.
[0048]
That is, when the slide part 20 and the operation knob 4a slide to the other end side of the housing 2 by the action of the compression spring 25, the downward hook 30 also moves to the other end side of the housing 2 and is hooked on the downward hook 30. 71 is loosened. Further, the arm cam pin 60 whose upper portion protrudes from the opening 16 also moves to the other end side of the housing 2 and pushes the other end of the arm 62 upward to rotate the arm 62 counterclockwise in FIG. Due to the counterclockwise rotation of the arm 62, one end of the arm 62 is lowered downward, whereby the above-described loose thread 71 can be pushed down and the thread 71 can be reliably removed from the downward hook 30.
[0049]
When the slide part 20 further moves to the other end side of the housing 2, the arm cam pin 60 comes into contact with the upper inner wall of the slide part 20 and returns to the retracted position. As a result, the arm 62 is actuated by the tension spring 64 in FIG. Rotating clockwise to the regulation position, the hand sewing needle threader 1 is in the initial state of FIG.
[0050]
In the present embodiment, the operation direction of the operation knob 4a is the horizontal direction, but the slide direction of the slide unit 20 may be horizontal, and the operation direction of the operation knob 4a is vertical by using a well-known link or cam. It may be a direction.
[0051]
【The invention's effect】
As described above in detail, according to the threading device for a hand-sewn needle according to claim 1, the thread support portion is configured so that the downward hook hooks the thread when the downward hook moves to the protruding position. As a result, the downward hook moves to the protruding position through the needle hole when the thread is not hooked. As a result, the downward hook can be smoothly passed through the needle hole, and the hook used to pass the thread through the needle hole. The yarn support portion is configured to move upward toward the downward hook when the downward hook is moved to the protruding position, so that the yarn is surely attached to the downward hook. Ru can be hooked to.
[0053]
According to the threading device for a hand-sewn needle according to claim 2 , the bifurcated portion at the upper end of the thread support portion straddles the downward hook and supports the thread at right angles and horizontally with the longitudinal direction of the hook portion. Even when the support portion is lifted, the hook portion can be smoothly slid.
[0054]
According to the threading device for a hand-sewn needle according to claim 3 , the buffer portion reduces the load applied to the downward hook when the hook portion moves toward the protruding position, so that the size of the needle hole is small. If the downward hook does not enter the needle hole of the hand-sewn needle, such as when it is smaller than the size of the downward hook or the hand-sewn needle is inserted into the needle receiving part with the insertion direction reversed, it is added to the hook part. The load can be reduced by the buffer portion, and the hook portion can be prevented from being bent or broken and broken.
[0055]
According to the threading device for a hand-sewn needle according to claim 4 , since the other buffering portion reduces the load applied to the downward hook when the downward hook moves toward the retracted position, the thickness of the thread. If the hook does not pull out smoothly from the needle hole of the hand-sewn needle while the thread is hooked on the thread, as in the case where the size of the needle hole is larger than the size of the needle hole of the hand-sewn needle, the load applied to the hook part It is possible to prevent the hook portion from being bent or broken and being damaged.
[0056]
According to the threading device for a hand-sewn needle according to claim 5 , after the downward hook is moved to the retracted position, the downward hook is at the initial position between the retracted position and the hand-sewn needle received by the needle receiving portion. When the hook is moved so that is positioned, it is placed above the downward hook between the retracted position and the needle hole of the hand-sewn needle received in the needle receiving part, and the hook part moves from the retracted position to the initial position. In addition, since the thread hooked on the downward hook moves downward, the thread can be reliably removed from the downward hook after the thread is pulled out from the needle hole.
[0057]
According to the threading device for a hand-sewn needle according to the sixth aspect , since the plate-like member is wider than the downward hook, the thread hooked on the downward hook can be reliably removed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a threading device for hand-sewn needles according to an embodiment of the present invention.
2 is a cross-sectional view of the threading device 1 for hand-sewn needles of FIG. 1 in an initial state.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a longitudinal sectional view for explaining a threading state of the threading device for hand-sewn needles of FIG. 1;
6 is a longitudinal sectional view for explaining a thread drawing state of the hand sewing needle threading device 1 of FIG. 1; FIG.
7 is a partially enlarged view of the periphery of the yarn support portion 67 of FIG.
FIG. 8 is a longitudinal sectional view for explaining a thread removing state of the threading device for hand-sewn needles of FIG. 1;
9 is a partially enlarged view of the periphery of the downward hook 30 in FIG. 8. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hand sewing needle threading device 4a Operation knob 5 Hand sewing needle insertion hole 6 Thread insertion slit 25, 32, 52 Compression spring 31 Hook part 33 Thread lifting cam part 60 Arm cam pin 62 Arm 67 Thread support part 67a Bifurcated part

Claims (6)

A needle receiving portion for receiving a hand-sewn needle with its needle hole down,
A hook portion having a downward hook at the tip;
A hook that moves the hook portion so as to reciprocate between a retracted position in which the downward hook is retracted and a protruding position in which the downward hook protrudes through a needle hole of a hand-sewn needle received in the needle receiving portion. Part moving means;
A yarn that is arranged under the downward hook at the protruding position, supports the yarn, and passes the yarn to the downward hook so that the downward hook hooks the yarn when the downward hook moves to the protruding position. A support portion,
The thread support device for a hand-sewn needle , wherein the thread support portion is configured to move upward toward the downward hook when the downward hook moves to the protruding position . The yarn support portion, at its upper end, said with straddle the downward hook, stitched needle according to claim 1, wherein said yarn characterized by having a longitudinal direction perpendicular and bifurcated portion for horizontally supporting the hook portion Threading device. The hand-sewn according to claim 1 or 2 , wherein the hook portion includes a buffer portion for setting a load applied to the downward hook when the hook portion moves toward the protruding position to a predetermined value or less. Needle threading device. The hook portion of the claims 1 to 3, characterized in that it comprises the other buffer portion for a fixed value or less the load on the downward hook when the hook portion is moved toward said retracted position The hand-sewn needle threading device according to any one of the above. After the downward hook is moved to the retracted position, hook portion returning means for returning the hook portion so that the downward hook is positioned at an initial position between the retracted position and the hand sewing needle received by the needle receiving portion. When,
The downward hook is disposed above the downward hook between the retracted position and a needle hole of a hand-sewn needle received in the needle receiving portion, and the downward hook is moved when the hook portion moves from the retracted position to the initial position. stitched needle thread passing device according to any one of claims 1 to 4, characterized in that and a yarn removing unit so as to move downward depressing the yarn hooked on. 6. The hand-sewn needle threading device according to claim 5 , wherein the thread removing portion includes a plate-like member having a width wider than the downward hook.

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