JP2589951B2 - Locking solenoid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking solenoid suitable for use as a yarn stopping mechanism used in a yarn feeding device of an automatic loom.

[0002]

2. Description of the Related Art A weft yarn feeding device of an automatic loom is for feeding a weft yarn by a fixed length, and this weft yarn feeding device uses a yarn stopping mechanism for controlling start and stop of the yarn feeding at a yarn feeding portion. ing. Such a yarn stopping mechanism operates by using a solenoid as a drive source, and controls the stop and start of feeding by projecting or retracting a stop pin into or from a movement path (yarn path) of the yarn by the solenoid. doing.

In such a yarn stopping mechanism, one surface of a main body to which a solenoid is attached and which movably accommodates a stop pin is used as a yarn path, and when the stop pin does not protrude from the surface, the weft yarn follows the surface. When the stop pin protrudes from the surface, the movement of the weft is stopped.
An example of such a conventional thread stopping mechanism is Japanese Utility Model Laid-Open No.
There is a plunger type structure shown in Japanese Patent No. 35874. The one described in the above publication, as shown in FIG.
A through hole b having a large diameter portion and a small diameter portion is formed in the main body a, and a solenoid c is disposed coaxially with the through hole above the open end of the through hole b. The plunger d of the solenoid c is slidably guided by a core bush f made of a magnetic material disposed in the guide tube e, and the connector tube h fitted and fixed in the hole g of the plunger c is attached to the main body. The guide tube is slidably guided by a resin bush i fitted and fixed in the small-diameter portion of the through hole b, and the distal end (the lower end in the figure) of the connector tube h.
A stop pin j is fitted and fixed to the hole, and a large diameter portion of the through hole b hits a spring retainer k which is coaxially arranged with the plunger c and is held integrally with the plunger by the connector tube h to prevent the jumping operation of the plunger. The cushion 1 is provided. The cushion 1 is formed by joining an annular cushion ring n made of an elastic material such as rubber to both surfaces of a stopper plate m. Further, a cushion member o made of rubber or the like is arranged to prevent a jumping operation when the stop pin j is retracted.

By the way, since the stop pin of the yarn stopping mechanism of the automatic loom reciprocates frequently (usually reciprocates about 300 million times a year on average), it is desirable to reduce the number of parts in frictional contact as much as possible. However, in the above-mentioned conventional plunger-type yarn stopping mechanism, the core bush f and the bush i are worn out early because frictional contact exists between the plunger d and the core bush f and between the connector tube h and the bush i. There is a problem that the thread stopping mechanism must be replaced frequently during its useful life. In addition, the stop pin must be prevented from jumping to prevent careless passage of the thread.However, in the above-described conventional thread stop mechanism, jumping when the stop pin retracts is simply prevented by a single cushion member. Therefore, there is a problem that a sufficient jumping prevention effect cannot be obtained.Also, a jumping prevention effect on the protruding side of the stop pin can be obtained, but the number of components of the cushion l increases, and the number of parts as a whole mechanism increases. And there is a problem that leads to an increase in cost. Further, since the above-mentioned thread stop mechanism has a structure in which the plunger moves straight, the stop pin does not need to exert a large operating force, but the plunger has to move linearly by the same stroke as the required reciprocating stroke of the stop pin. Therefore, the solenoid must be able to exert a relatively large suction force, and a large solenoid is required, and from this point, the entire yarn stopping mechanism also becomes large.

[0005] For this reason, a so-called flapper type solenoid in which a plate-like movable member is arranged at one end of an electromagnet composed of a coil and a fixed iron core so as to swing or rotate is used to form a thread stopping mechanism, and the overall structure of the mechanism is constructed. As shown in FIG. 8, the conventional flapper type solenoid fits a fixed iron core q having a flange portion r formed at one end in a cylindrical coil p as shown in FIG. A movable member t made of a magnetic material is rotatably attached to one end of a magnetic frame s that is magnetically connected to the fixed core and surrounds the coil so that the movable member is attracted by the fixed core. The movable iron plate is biased away from the fixed iron core by applying a spring u to the frame. However, in such a flapper type solenoid, since the flange portion r protrudes from the end face of the coil, the magnetic flux easily leaks to the magnetic frame s through the flange portion r, and the magnetic force cannot be effectively used, resulting in poor responsiveness. Therefore, there is a drawback that the coil spring is not suitable for high-speed operation, and that the end of the coil spring is hung on the movable member and the magnetic frame. is there.

[0006]

One problem to be solved by the present invention is that the number of parts worn or damaged by the repetitive operation of the locking pin is reduced to improve the durability and to simplify the mechanism. SUMMARY OF THE INVENTION An object of the present invention is to provide a flapper-type locking solenoid that can reduce costs by taking measures.

Another object of the present invention is to provide a flapper type locking solenoid which has a high magnetic efficiency and a high response speed, and can be applied to a high-speed operation.

[0008]

SUMMARY OF THE INVENTION One aspect of the present invention provides
A coil, a fixed iron core fitted in the coil, a magnetic frame surrounding the coil and magnetically connected to the fixed iron core, and a coil arranged at one end of the coil to be swingable. A movable member made of a magnetic material which is attracted to the coil side by energizing the movable member, and a locking pin is attached to one end of the movable member. In the locking solenoid that is retracted into the movable core, the position of the suction surface of the fixed iron core on the movable member side is retracted from the end of the coil to form a gap in the coil, and the movable iron core is fixed to the movable member. The movable core is housed in the gap, a support spring is attached to the other end of the movable member, and the movable member is swingably supported by the support spring. A cushion member that contacts the movable member; It is configured.

Another invention of the present application is directed to a coil, a fixed iron core fitted in the coil, a magnetic frame surrounding the coil and magnetically connected to the fixed iron core, and one end of the coil. A movable member made of a magnetic material that is arranged to be swingable and is attracted to the coil side by energization of the coil; a locking pin is attached to one end of the movable member; In a locking solenoid that moves the locking pin into and out of the thread passage by operation, a position of an end of the fixed iron core on the movable member side is retracted from an end of the coil to form a gap in the coil, A movable iron core is fixed to the movable member, the movable iron core is accommodated in the gap, and the vicinity of the other end of the movable member is swingably supported by a bearing. The other end of the movable member and the locking solenoid A compression coil spring is arranged between the At both ends of the moving path of the moving member is formed by arranging the cushion member in contact with the movable member.

[0010] In the first aspect of the present invention, further, a housing surrounding the magnetic frame and a spacer member disposed between the housing and the coil magnetic frame to form a space defining a movement path of the movable member are provided. One of the cushion members may be fixed to the magnetic frame, and the other may be fixed to the spacer member. In the latter invention, the housing surrounds the magnetic frame, and a spacer member that forms a space that defines a movement path of the movable member is disposed between the housing and the magnetic frame, and one of the cushion members May be fixed to the magnetic frame, and the other may be fixed to the spacer member.

[0011]

In the above construction, when the coil is not energized, the movable member is biased away from the magnetic frame by the action of the support spring or the coil spring, and the locking pin projects into the thread passage. Therefore, the yarn cannot move in the yarn passage, being blocked by the locking pin. When the coil is energized, the movable core is attracted to the fixed core side, so that the movable member moves to the magnetic frame side, and the locking pin retracts from the thread passage. This allows the thread to move. When the movable member moves toward the magnetic frame, the movable member hits the cushion member to prevent the movable member from rebounding, that is, jumping. Next, when the energization of the coil is stopped, the movable member is pushed back in a direction away from the magnetic frame by the action of the support spring or the coil spring, but the movable member abuts on the cushion member, thereby preventing the movable member from rebounding, that is, jumping. You.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a locking solenoid 1 suitable for use as the yarn stopping mechanism of the present embodiment. The locking solenoid 1 of this embodiment includes a cylindrical or box-shaped main body 11 having one end closed as a whole,
The housing 10 includes an open end of the main body 11, that is, a cover 12 fixed to a lower end in FIG.
The main body and cover of the housing are made of aluminum in this embodiment, but may be made of other non-magnetic materials such as ceramic and synthetic resin. The electromagnet assembly 2 is arranged in the housing 10 and is fixed to the cover 12. The electromagnet assembly 2
In this embodiment, the lower end (FIG. 1) is made of a magnetic material.
) Is fixed to the cover 12 by a known means such as a set screw, and a second magnetic frame 22 fixed to the cover 12 in the first magnetic frame 21; 22, a coil 23 comprising a coil bobbin 24 fixedly disposed between the coil bobbin 24 and a coil winding 25 wound around the coil bobbin 24, and a fixed iron core 27 made of a magnetic material inserted into a hole 240 of the coil bobbin 24. It has. The lower end (in FIG. 1) of the fixed iron core 27 is tightly fitted into a hole 220 formed in the second magnetic frame 22, and both are magnetically connected.
Further, both end edges 221 of the second magnetic frame 22 are in close contact with the inner surface 211 of the lower end of the first magnetic frame 21,
The two are magnetically connected. In this embodiment, the first magnetic frame 21 has a whole shape as shown in FIG. 4 and a circular hole 21 aligned with the hole 240 of the coil bobbin 24 at the center of the upper end 212.
3 are formed. As is apparent from FIG. 4, a groove is formed in the lower edge of the magnetic frame 21 and the magnetic frame 2
On the side edge of 2, a convex portion that enters the groove is formed, and the convex portion enters the groove and is combined therewith. The position of the suction surface of the fixed iron core 27, that is, the position of the upper end surface 270 in FIG.
Only is retracted into the hole 240 of the coil bobbin 24 to form a space G.

A plate-like movable member 3 made of a magnetic material is disposed in the housing 2 above the magnetic frame 21 of the electromagnet assembly 2. One end 42 of the support spring 4 is fixed to one end (the left end in FIG. 1) of the movable member 3. The support spring 4 is a plate spring in which a circular arc portion 41 and both ends 42 and 43 are integrally formed at the center, and the end 43 is provided on one (left side in FIG. 1) side surface of the magnetic frame 21. Fixed. The support spring 4 supports the movable member 3 so as to be able to swing around the arcuate portion 41 and acts as a return spring for the rotating member 3. The material, thickness, and width W of the support spring 4 are determined so that the movable member can withstand a high frequency (for example, 300 million times a year) reciprocating rocking motion. A movable core 5 made of a magnetic material is fixed below the movable member 3. The method of fixing the movable core 5 to the movable member 3 may be such that the upper end portion 51 of the movable core 5 is fitted into the hole 31 formed in the movable member 3 and fixed by caulking or the like. The movable iron core 5 has a hole 240 in the coil bobbin 24.
It is cylindrical according to the circular shape of the cross section of
Its outer diameter is somewhat smaller than the diameter of the hole of the coil bobbin so that it does not come into contact with the coil bobbin even by the swinging movement of the movable member 3. The cross section of the movable iron core may be rectangular. The movable iron core 5 extends downward in the gap defined by the hole 240 of the coil bobbin, and its length is
3, the lower end surface, that is, the suction surface 52 is separated from the suction surface 270 of the fixed core 27 by a gap of about 0.2 mm when the suction member 52 is attracted to the fixed core 27 side. Has been determined in connection with. This is to reduce the gap between the two as much as possible to improve the magnetic efficiency and to prevent friction and noise due to the contact between the two. As described above, the suction surface 270 of the fixed core 27 is retracted into the hole of the coil bobbin, and the movable core 5 is arranged in the gap between the holes, whereby the fixed core 27 → the movable core 5 → the magnetic frame 21 → the magnetic frame Since a magnetic circuit of 22 → fixed iron core 27 is formed, the leakage of magnetic flux from the fixed iron core to the magnetic frame can be prevented unlike a conventional flapper type solenoid, and the response speed of the solenoid is improved by effectively utilizing the magnetic force. it can. In this embodiment, the suction surface 2 of the fixed iron core 27 is used.
70 is formed perpendicular to the axis of the fixed core, and
Are formed perpendicular to the axis of the movable iron core, but those suction surfaces may be inclined at a desired angle with respect to the axis.

A spacer member 6 made of a resin material is arranged between the magnetic frame 21 and the inner surface 13 of the main body 11 in the housing 10. A groove 61 is formed in the spacer member to form a space for limiting the movement path of the movable member 3. One cushion member 71 is joined to the upper surface of the upper end portion 212 of the magnetic frame 21 in the groove 61, and the other cushion member 72 is joined to the bottom surface 62 of the groove. When the coil is energized, the movable core 5 is attracted to the fixed
When the movable member 3 is pulled toward the magnetic frame 21, it comes into contact with the movable member 3, the cushion member 72 stops energizing the coil, and the movable member 3 moves when the movable member 3 is moved away from the magnetic frame 21 by the support spring. Contact 3 These cushion members 71 and 72 are made of a material such as urethane rubber which absorbs shock but does not cause the movable member 3 to bounce, that is, does not cause a jumping operation.

A locking pin 8 made of a corrosion-resistant material such as stainless steel is fixed to the other end (the right end in FIG. 1) of the movable member 3. The locking pin 8 has a hole 63 formed in the spacer member 6 and a hole 1 formed in the main body 11 of the housing 10.
4 so that it can protrude above the main body through 4.
When the movable member 3 is in contact with the cushion member 72 and the movable core 5 is not attracted to the fixed core 27 as shown in FIG.
0 enters the recess R of the member across the thread path P defined by the upper surface 15 and the member disposed adjacent to the housing, and when the movable core 5 is sucked toward the fixed core 27, It is determined to be slightly withdrawn. A resin stopper member 18 having a felt 17 adhered inside is fixed in a hole 14 formed in the main body 11, and the locking pin comprises the felt 17 and the stopper member 1.
8 extending through a hole defined by.

In the above configuration, when the winding 25 of the coil 23 constituting the electromagnet assembly 2 is not energized, the movable member 3 is brought into contact with the cushion member 73 as shown in FIG. It has become. Therefore, the locking pin 8 extends across the yarn path P as shown,
The front end (the upper end in FIG. 1) is in a state of entering the recess R. For this reason, the yarn S extending perpendicular to the paper surface of FIG. 1 and traveling in the direction of the arrow X hits the locking pin 8 and is prevented from moving. Moreover, since the angle θ formed between the axis of the locking pin 8 and the traveling direction of the thread is an acute angle, it is difficult for the thread to rub through the tip of the locking pin.

Next, when the coil 25 is energized and the movable iron core 5 is attracted to the fixed iron core 27 side of the electromagnet assembly 2, the movable member 3 is drawn toward the magnetic frame 21 against the repulsive force of the support spring 4. , Comes into contact with the cushion member 72 and stops. When the coil is energized, the magnetic flux emitted from the fixed core 27 hardly leaks to the magnetic frame.
As a result, the magnetic efficiency is improved, and the movable iron core can be quickly and strongly absorbed. The rebound, that is, the jumping operation when the movable member 3 comes into contact with the cushion member 71 and stops, is effectively prevented by the cushion member 71. In this state, since the tip of the locking pin 8 is retracted from the upper surface 15 of the housing 10,
The yarn S can pass through the yarn path P. Next, when the energization of the coil 25 is stopped, the movable member 3 returns to the state shown in FIG. 1 due to the restoring force of the support spring 4, but the rebound of the movable member 3, that is, the jumping operation is prevented by the cushion member 72. The jumping operation of the locking pin prevents the thread S from slipping through the tip of the locking pin 8 as shown by the arrow Y.

FIG. 5 shows another embodiment of the locking solenoid 1a. Locking solenoid 1a of this embodiment
Here, the same components as those of the locking solenoid of the previous embodiment will be described using the same reference numerals, and only the different parts will be described using the reference numerals with the suffix a.
The housing 10 includes a main body 11 having a cylindrical or box-like shape with one end closed as a whole, and a cover 12 fixed to an open end of the main body 11, that is, a lower end in FIG. The main body and cover of the housing are made of aluminum in this embodiment, but may be made of other non-magnetic materials such as ceramic and synthetic resin. The electromagnet assembly 2 is arranged in the housing 10 and is fixed to the cover 12. In this embodiment, the electromagnet assembly 2 is made of a magnetic material, and has a lower end (in FIG. 5) fixed to the cover 12 and a cover 1 in the first magnetic frame 21.
2 and a coil bobbin 2 disposed and fixed between the second magnetic frame 22 and the magnetic frames 21 and 22
4 and coil winding 2 wound around coil bobbin 24
5 and a coil 23. Hole 24 in coil bobbin 24
And a fixed iron core 27 made of a magnetic material inserted in the inside. The lower end (in FIG. 1) of the fixed iron core 27 is tightly fitted into a hole 220 formed in the second magnetic frame 22, and both are magnetically connected. Further, both end edges 221 of the second magnetic frame 22 are in close contact with the inner surface 211 at the lower end of the first magnetic frame 21, and are magnetically connected therebetween. In this embodiment, the first magnetic frame 21 has a whole shape as shown in FIG.
A circular hole 213 aligned with 40 is formed. As is apparent from FIG. 4, a groove is formed on the lower edge of the magnetic frame 21 and a convex portion is formed on the side edge of the magnetic frame 22 to enter the groove. It has become. The position of the attracting surface of the fixed iron core 27, that is, the position of the upper end surface 270 in FIG. 1, is retracted into the hole 240 of the coil bobbin 24 by a distance L from the outer surface of the upper end portion 212 of the magnetic frame 21 to form a space G. Also in this embodiment, the suction surface 27 of the fixed iron core 27 is used.
Although 0 is formed perpendicular to the axis of the fixed core and the suction surface 52 of the movable core 5 is formed perpendicular to the axis of the movable core, these suction surfaces may be inclined at a desired angle with respect to the axis.

A plate-like movable member 3 made of a magnetic material is disposed in the housing 2 above the magnetic frame 21 of the electromagnet assembly 2. In this embodiment, both sides near one end (the left end in FIG. 5) of the movable member 3 are shown in FIG.
As shown in FIG. 5, a support shaft 33a is formed so as to protrude.
It is rotatably or swingably supported by a bearing 35a attached to a bracket 34a fixed to the side surface by known means such as welding or screwing. Bearing 35a
It is preferable that the rotation resistance is small such as a ball bearing, a roller bearing or a needle bearing. A compression coil spring 4 is provided between one end of the movable member 3 and a spring receiving surface 16a formed inside the main body 11 of the housing 10.
a is arranged. The coil spring 4a acts as a return spring for the movable member 3. The allowable stress of the spring of the support spring 4 is determined so as to withstand a high frequency (for example, 300 million times a year) reciprocating rocking motion of the movable member. At an end of the movable member 3, a holding pin 44a that is inserted into the coil spring 4a and prevents the coil spring from dropping is fixed by a known means such as interference fitting or screwing. A movable iron core 5 made of a magnetic material is fixed to the lower side of the movable member 3 as in the above embodiment. The method of fixing the movable core 5 to the movable member 3 may be such that the upper end portion 51 of the movable core 5 is fitted into the hole 31 formed in the movable member 3 and fixed by caulking or the like. The movable iron core 5 has a hole 240 in the coil bobbin 24.
It is cylindrical according to the circular shape of the cross section of
Its outer diameter is somewhat smaller than the diameter of the hole of the coil bobbin so that it does not come into contact with the coil bobbin even by the swinging movement of the movable member 3. The cross section of the fixed core may be rectangular. The movable iron core 5 extends downward in the gap defined by the hole 240 of the coil bobbin, and its length is
3, the lower end surface, that is, the suction surface 52 is separated from the suction surface 270 of the fixed core 27 by a gap of about 0.2 mm when the suction member 52 is attracted to the fixed core 27 side. Has been determined in connection with. This is to reduce the gap between the two as much as possible to improve the magnetic efficiency and to prevent friction and noise due to the contact between the two. As described above, the suction surface 270 of the fixed core 27 is retracted into the hole of the coil bobbin, and the movable core 5 is arranged in the gap between the holes, whereby the fixed core 27 → the movable core 5 → the magnetic frame 21 → the magnetic frame 22 → Because a magnetic circuit of the fixed iron core 27 is formed, leakage of magnetic flux from the fixed iron core to the magnetic frame can be prevented as in the conventional flapper type solenoid, and the response speed of the solenoid can be improved by effectively utilizing the magnetic force. .

In the housing 10, a spacer member 6 made of a resin material is disposed between the magnetic frame 21 and the inner surface 13 of the main body 11. A groove 61 is formed in the spacer member to form a space for limiting the movement path of the movable member 3. One cushion member 71 is joined to the upper surface of the upper end portion 212 of the magnetic frame 21 in the groove 61, and the other cushion member 72 is joined to the bottom surface 62 of the groove. When the coil is energized, the movable core 5 is attracted to the fixed
When the movable member 3 is pulled toward the magnetic frame 21, it comes into contact with the movable member 3, the cushion member 72 stops energizing the coil, and the movable member 3 moves when the movable member 3 is moved away from the magnetic frame 21 by the support spring. Contact 3 These cushion members 71 and 72 are made of a material such as urethane rubber which absorbs shock but does not cause the movable member 3 to bounce, that is, does not cause a jumping operation.

A locking pin 8 made of a corrosion-resistant material such as stainless steel is fixed to the other end (the right end in FIG. 5) of the movable member 3. The locking pin 8 has a hole 63 formed in the spacer member 6 and a hole 1 formed in the main body 11 of the housing 10.
4 so that it can protrude above the main body through 4.
When the movable member 3 is in contact with the cushion member 72 without the movable iron core 5 being attracted to the fixed iron core 27 side as shown in FIG.
0 enters the recess R of the member across the thread path P defined by the upper surface 15 and the member disposed adjacent to the housing, and when the movable core 5 is sucked toward the fixed core 27, It is determined to be slightly withdrawn. A resin stopper member 18 having a felt 17 adhered inside is fixed in a hole 14 formed in the main body 11, and the locking pin comprises the felt 17 and the stopper member 1.
8 extending through a hole defined by.

The locking solenoid of the above embodiment is almost the same as that of the above embodiment. That is, when the winding 25 of the coil 23 constituting the electromagnet assembly 2 is not energized, the portion on the left side of the bearing of the movable member 3 (in FIG. 5) is pushed down by the coil spring 4a, and the right side portion is shown in FIG. So that it is elastically pressed against the cushion member 72 and is in contact with it. Therefore, the locking pin 8 extends across the yarn path P as shown in FIG. 5, and the tip (the upper end in FIG. 5) is in the recess R.
For this reason, the yarn S extending perpendicular to the paper surface of FIG. 5 and traveling in the direction of the arrow X hits the locking pin 8 and is prevented from moving. Moreover, since the angle θ formed between the axis of the locking pin 8 and the traveling direction of the thread is an acute angle, it is difficult for the thread to rub through the tip of the locking pin.

Next, when the coil 25 is energized to attract the movable iron core 5 toward the fixed iron core 27 of the electromagnet assembly 2, the right side (in FIG. 5) of the bearing 35a of the movable member 3 is subjected to the repulsive force of the coil spring 4a. It is drawn to the magnetic frame 21 side in opposition, stops against the cushion member 72. When the coil is energized, the magnetic flux emitted from the fixed core 27 hardly leaks into the magnetic frame and enters the movable core 5, so that the magnetic efficiency is improved, and the movable core can be quickly and strongly attracted. The movable member 3 is a cushion member 7
The rebound, that is, the jumping operation at the time of stopping in contact with the second member 2 is effectively prevented by the cushion member 72. In this state, since the tip of the locking pin 8 is retracted from the upper surface 14 of the housing 10, the thread S can pass through the thread path P. Next, when the energization of the coil 25 is stopped, the movable member 3 is moved by the restoring force of the coil spring 4a as shown in FIG.
However, the bouncing of the movable member 3, that is, the jumping operation, is prevented by the cushion member 73, so that the thread S slips through the tip of the locking pin 8 as shown by the arrow Y by the jumping operation of the locking pin 8. Is prevented.

[0024]

According to the present invention, the following effects can be obtained. (1) The attracting surface of the fixed core is retracted into the hole of the coil, and the movable member is fixed with the movable core that enters the hole, so that there is almost no leakage of magnetic flux from the fixed core to the magnetic frame, and the magnetic efficiency is improved. Since a large force can be exerted at the start, the response speed is increased, and this can be applied to speeding up of an automatic loom. For example, the operation speed of a conventional flapper type solenoid is 15 to 20 milliseconds, and the suction force is 40 to 120.
g, the operation speed of the present invention is 2.5 to
3.4 milliseconds, suction force is 80g-1kg. (2) The operating length of the movable iron core for driving the locking pin, that is, the stroke, can be reduced to half or less of the required stroke of the locking pin as compared with the conventional plunger type. Can be faster. (3) Since the bearing member used in the conventional plunger system is eliminated, there is no wearable part, and the durability is improved, and the necessity of replacing the bearing is eliminated. Can be reduced. (4) The amount of rebound of the locking pin, that is, the amount of jump can be reduced, so that it is possible to eliminate yarn control mistakes (thread slip-through). (5) Since the moving amount of the movable iron core, that is, the stroke, is smaller than the stroke of the plunger of the plunger type solenoid, the coil can be small, and the entire solenoid can be downsized. (6) Since the structure is simpler than that of the conventional plunger type, the cost can be reduced. (7) When a leaf spring-like support spring is used, the spring acts as a fulcrum, so that the amount of deflection is extremely small even when the movable member swings, and when a coil spring is used, the position of the spring is close to the fulcrum. Therefore, the amount of deflection is extremely small, a uniform spring force can be exerted over the entire moving range of the movable member, and fatigue fracture due to deflection is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of a locking solenoid according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIGS. 1 and 5;

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a developed perspective view of the magnetic frame.

FIG. 5 is a sectional view of a second embodiment of the locking solenoid of the present invention.

FIG. 6 is a view taken along line CC of FIG. 5;

FIG. 7 is a sectional view of a conventional plunger-type thread stopping mechanism.

FIG. 8 is a side view of a conventional flapper type solenoid.

DESCRIPTION OF SYMBOLS 1, 1a Locking solenoid 10 Housing 11 Main body 12 Cover 2 Electromagnet assembly 21 22 Magnetic frame 23 Coil 27 Fixed iron core 3 Movable member 33a Support shaft 35a Bearing 4 Support spring 4a Coil spring 5 Movable iron 6 Spacer member 71, 72 Cushion member 8 Lock pin

Claims (4)

(57) [Claims] 1. A coil, a fixed core fitted into the coil, a magnetic frame surrounding the coil and magnetically connected to the fixed core, and swingably disposed at one end of the coil. And a movable member made of a magnetic material that is attracted to the coil side by energizing the coil. A locking pin is attached to one end of the movable member, and the movable member is reciprocally oscillated to perform the locking. In a locking solenoid for moving a pin into and out of a thread passage, a position of a suction surface of the fixed iron core on a side of the movable member is retracted from an end of the coil to form a gap in the coil, and a movable member is movable in the coil. The movable core is accommodated in the gap by fixing an iron core, a support spring is attached to the other end of the movable member, and the movable member is swingably supported by the support spring. Cushions at both ends of the movable member A locking solenoid, wherein a member is arranged. 2. The locking solenoid according to claim 1, further comprising: a housing surrounding the magnetic frame; and a space disposed between the housing and the coil magnetic frame to limit a moving path of the movable member. A locking member having a spacer member forming one of the cushion members, one of the cushion members being fixed to the magnetic frame, and the other being fixed to the spacer member. 3. A coil, a fixed core fitted in the coil, a magnetic frame surrounding the coil and magnetically connected to the fixed core, and swingably disposed at one end of the coil. And a movable member made of a magnetic material that is attracted to the coil side by energizing the coil. A locking pin is attached to one end of the movable member, and the movable member is reciprocally oscillated to perform the locking. In a locking solenoid for moving a pin into and out of a thread passage, a position of an end of the fixed iron core on the movable member side is retracted from an end of the coil to form a gap in the coil, and the movable member is movable. An iron core is fixed, the movable iron core is accommodated in the gap, and the vicinity of the other end of the movable member is swingably supported by a bearing, between the other end of the movable member and the housing of the locking solenoid. And a moving path of the movable member. A cushion member that contacts the movable member at both ends of the locking solenoid. 4. The locking solenoid according to claim 3, wherein the housing surrounds the magnetic frame, and a spacer member defining a space defining a movement path of the movable member is provided between the housing and the magnetic frame. A locking solenoid disposed, wherein one of the cushion members is fixed to the magnetic frame and the other is fixed to the spacer member.