JP2002260515A - Thermal trip device and its gap adjusting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal trip device which can be improved in workability of assembly and gap adjustment. SOLUTION: In this thermal trip device 14 comprising a bimetal 11 having a guide dent 11a opened at the end of the side abutting on a trip bar and an engaging hole 11b formed at predetermined intervals from the guide dent in the length direction, and a regulating element 12 of which the one end side is engaged in the engaging hole 11b and the other end side is turnable in the opposite direction to the deformation direction of the bimetal by sliding in the guide dent 11a at the center of the engaging hole 11b, and which is firmly fixed to the bimetal 11 in a state that it is abutted on the trip bar and pushed back due to the deformation, the guide dent 11a is formed so that its opening side has a wider width.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal trip device for a no-fuse circuit breaker and the like, and a method for adjusting a gap thereof.

[0002]

2. Description of the Related Art Generally, a thermal trip device is configured as shown in, for example, Japanese Patent Publication No. 58-49978, and the operating point of the trip mechanism, that is, the position where the bimetal presses the trip bar, is Variations occur due to the accumulation of manufacturing variations, such as processing, assembly errors, and variations in material characteristics of the components that make up the trip mechanism, resulting in variations in the breaker break time. Then, in order to absorb such manufacturing variations, an adjustment screw is attached to the tip of the bimetal, and the distance (gap) from the tip of the adjustment screw to the trip bar is adjusted by changing the amount of protrusion of the adjustment screw from the bimetal. Like that.

However, in the above-described gap adjustment with the adjusting screw, the gap is adjusted to a constant value by changing the amount of protrusion of the adjusting screw, so that only the positional variation can be adjusted, and the screw mechanism itself is not adjusted. Also has a variation factor, it is difficult to adjust the gap with high accuracy.

Therefore, Japanese Patent Application Laid-Open No. 2001-15006 filed by the same applicant as the present application enables accurate gap adjustment by a method as described below. That is, as shown in FIG. 10A, a guide groove 1a formed at one end on the side contacting a trip bar (not shown), and a predetermined interval in the longitudinal direction from the guide groove 1a. A hook-shaped portion 2a which can be engaged with the engagement hole 1b of the bimetal 1 at one end side; and a bimetal 1 having a pair of mounting holes 1c formed at the other end.
The other end side is formed so as to slide in the guide groove 1a of the bimetal 1 and connect the arcuate portion 2b rotatable about the hook 2a, the hook 2a and the arc 2b, and a trip. The adjuster 2 having the contact portion 2c capable of contacting the bar is shown in FIG.
A plurality of sets are prepared by engaging as shown in FIG. At this time, each adjuster 2 is formed so that the center of gravity always covers the direction indicated by the arrow A in the figure.

[0005] A contact portion 2c of each adjuster 2 is opposed to a fixed trip bar via a gap, and a predetermined current is supplied for a predetermined time. Then, the bimetal 1 is deformed, and the abutting portion 2c of the adjuster 2 abuts on the trip bar. However, the bimetal 1 is further deformed with energization, so that the adjuster 2 is pushed back and the center of the hook-shaped portion 2a is centered. When the arc-shaped portion 2b slides in the guide groove 1a of the bimetal 1 in the direction shown by the arrow B in the figure and turns, and when a certain time has elapsed and the energization is stopped, it is shown in FIG. It becomes such a state. At this point, the adjuster 2 is joined and fixed to the bimetal 1 by, for example, welding of YAG, TIG, or the like.

At this time, the distance between the contact portion 2c of each adjuster 2 and the trip bar, that is, the gap has a value corresponding to the amount by which the adjuster 2 is pushed back. When the energization is started again, the bimetal 1 is deformed, and the contact portions 2c of the respective adjusters 2 abut against the trip bar, respectively.
In other words, the time until the trip bar operates is constant in all the bimetals 1 and does not change.

[0007]

As described above, the conventional thermal trip device cancels the manufacturing variation of each bimetal 1 by the amount of movement of the bimetal 1 of the adjuster 2 in the opposite direction to the deformation of the bimetal 1, Since the time until the trip bar operates is fixed, the gap can be adjusted accurately with a simple structure and without the need for an adjusting mechanism such as an adjusting screw, but the adjuster 2 is engaged with the bimetal. There is a problem that there is room for improvement in the assembly work to be performed, the work for adjusting the gap for fixing the adjuster 2 to the bimetal 1, and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a thermal trip device capable of improving the workability of assembling and gap adjustment, and a method of adjusting the gap. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided a thermal trip device having a guide groove formed at one end on a side in contact with a trip bar, and a guide groove formed in the longitudinal direction with the guide groove. A bimetal having an engagement hole formed with an interval between the two ends, and one end of the bimetal is engaged with the engagement hole, and the other end slides in the guide groove with the engagement hole as a center. A thermodynamic tripping device having an adjuster that is rotatable in the opposite direction and that is fixed to the bimetal in a state in which it is brought into contact with the trip bar due to deformation and pushed back, and the opening side of the guide groove is formed wide. It is.

[0010] In a second aspect of the present invention, there is provided a thermal dynamic trip device according to the first aspect, wherein both side surfaces of the guide groove are formed in a tapered shape.

The thermal trip device according to a third aspect of the present invention includes a guide groove formed at one end on the side contacting the trip bar, and a predetermined distance in the longitudinal direction from the guide groove. A bimetal having an engagement hole formed by
One end is engaged with the engaging hole, and the other end is slidable in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and is pressed against the trip bar by the deformation. In a thermal trip device provided with an adjuster fixed to a bimetal in a state where the bimetal is placed, one end of the bimetal is formed so that the heights on both sides thereof are different from the center of the guide groove.

According to a fourth aspect of the present invention, there is provided a thermal trip device, wherein a guide groove formed at one end on a side contacting the trip bar is provided, and the guide groove is provided at a predetermined interval in the longitudinal direction. A bimetal having an engagement hole formed by
One end is engaged with the engaging hole, and the other end is slidable in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and is pressed against the trip bar by the deformation. In a thermal trip device provided with an adjuster fixed to a bimetal in a state of being separated, a guide groove side of an engagement hole is formed wide.

According to a fifth aspect of the present invention, there is provided a thermal trip device according to any one of the first to fourth aspects, wherein the bimetal is formed by punching and the punching side is arranged to face the trip bar. It is.

According to a sixth aspect of the present invention, there is provided a thermal trip device having a guide groove formed at one end on a side contacting the trip bar, and a predetermined gap in the longitudinal direction with the guide groove. A bimetal having an engagement hole formed by
One end is engaged with the engaging hole, and the other end is slidable in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and is pressed against the trip bar by the deformation. In a thermal trip device having an adjuster fixed to a bimetal in a separated state, the adjuster has a hook-like portion which can be engaged with an engagement hole of the bimetal at one end and a bimetal at the other end. An arcuate portion that slides in the guide groove and is rotatable around the hook-like portion, and a contact portion formed to connect the hook-like portion and the arcuate portion and that can contact the trip bar are provided. Things.

According to a seventh aspect of the present invention, there is provided a thermal dynamic trip device according to the sixth aspect, wherein a protrusion for restricting sliding is formed at the tip of the arcuate portion of the adjuster.

According to an eighth aspect of the present invention, in the thermal dynamic trip device according to the sixth aspect, the portion of the contact portion of the adjuster that contacts the trip bar is formed in a projecting shape.

According to a ninth aspect of the present invention, in the thermal dynamic trip device according to the sixth aspect, a portion of the contact portion of the adjuster that contacts the trip bar is formed in a flat shape.

[0018] Further, claim 1 according to claim 10 of the present invention.
The method for adjusting the gap of the thermal trip device according to any one of the above (1) to (9), wherein the step of engaging the adjuster with the bimetal, the step of causing the contact portion to face the trip bar via a predetermined gap, and the step of applying a predetermined current Thermal traction including the step of energizing for a certain period of time and the step of fixing the adjuster to the bimetal while the bimetal deforms due to the energization and the contact part of the adjuster abuts the trip bar, and is pushed back and moved In the method of adjusting the gap of the detaching device, a plurality of poles are simultaneously energized and simultaneously fixed to the bimetal.

[0019] Further, claim 1 according to claim 11 of the present invention.
The method for adjusting the gap of the thermal trip device according to any one of the above (1) to (9), wherein the step of engaging the adjuster with the bimetal, the step of causing the contact portion to face the trip bar via a predetermined gap, and the step of applying a predetermined current Thermal traction including the step of energizing for a certain period of time and the step of fixing the adjuster to the bimetal while the bimetal deforms due to the energization and the contact part of the adjuster abuts the trip bar, and is pushed back and moved In the method of adjusting the gap of the detaching device, a current is supplied to a plurality of poles while being shifted by a fixed time, and the electrodes are fixed to the bimetal while being shifted by a fixed time.

A gap adjusting method for a thermal trip device according to a twelfth aspect of the present invention is the tenth aspect of the present invention.
In 1, a current is supplied while the trip bar is fixed at a plurality of locations to fix the adjuster to the bimetal.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a perspective view showing the configuration of a thermal excursion device according to Embodiment 1 of the present invention, FIG. 2 is a front view showing the configuration of the bimetal in FIG. 1, and FIG. 3 is a perspective view showing the configuration of the adjuster in FIG. FIG. 4 is a front view showing a state in which the adjuster is engaged with the bimetal, FIG. 5 is a front view showing a state in which the contact portion of the adjuster is in contact with the trip bar, and FIG. It is a flowchart for explaining the gap adjustment method of a dynamic trip device.

In the drawing, reference numeral 11 denotes a rectangular bimetal formed by stamping a plate-like member as shown in FIG. 2, and has a tapered side surface at one end on a side that comes into contact with a trip bar (not shown). A guide groove 11a formed and opened has an engagement hole 11b formed on the guide groove 11a side wide at a predetermined interval in the longitudinal direction from the guide groove 11a, and a mounting hole 11c formed on the other end side. Have been. As shown in FIG. 3, reference numeral 12 denotes a hook-like portion 12a which can be engaged with the engaging hole 11b of the bimetal 11 on one end side, and slides in the guide groove 11a of the bimetal 11 on the other end side so that the hook-like portion 12a is centered. An arcuate portion 12c having a protruding portion 12b formed at the tip thereof for restricting sliding and a hook-like portion 12a and an arcuate portion 12c are formed so as to be connected to each other. As shown in FIG. The adjusters each have a contact portion 12d capable of contacting the trip bar 13 and are engaged with the bimetal 11 as shown in FIG.
The bimetal 11 is incorporated into the main body by screwing through the mounting hole 11c, and the thermal trip device 14 is configured.

Next, a method for adjusting the gap of the thermal trip device according to the first embodiment of the present invention will be described with reference to FIG. Actually, multiple poles are adjusted simultaneously,
The following description is for the case of a single pole. First, FIG.
As shown in (A), the trip bar 13 is set to the operating position and held so as not to be moved by another jig. And
This trip bar 13 is opposed via a gap. At this time, as shown in FIG. 4, the adjuster 12 always has a center of gravity in the direction indicated by the arrow in the figure, and the protrusion 12b is locked by the bimetal 11 to restrict the sliding, so that the posture is adjusted. Is held.

In this state, energization is started and a predetermined current is applied for a certain period of time. Then, the bimetal 11 is deformed, and FIG.
As shown by the arrow in FIG. 3B, the contact portion 12d of the adjuster 12 is deformed and inclined toward the trip bar 13 side, and
However, since the bimetal 11 further deforms with the energization, the arcuate portion 12c of the adjuster 12 slides as shown by an arrow in FIG. Move in the direction. Next, in this state, the adjuster 12 is fixed to the bimetal 11 by, for example, welding such as TIG, YAG or the like, and fixed and integrated.

When the energization is stopped, the bimetal 11 is cooled and returned to the original state. However, as shown in FIG. 6D, the tip of the contact portion 12d of the adjuster 12 and the The gap between the adjusters 12 is the bimetal 1
6A is larger than the gap in the state shown in FIG. Next, the trip bar 13
When the energization is started in the same manner as described above in a state where the holding of the bimetal 11 is released, the bimetal 11 is deformed again as shown in FIG. Activate 13.

The time from the start of the energization to the activation of the trip bar 13 is reproduced and does not change, and this time is the operation time of the thermal trip device. That is, even when the bimetals 11 having a plurality of poles are energized, the moving amounts of the adjusters 12 are adjusted in accordance with the amount of variation in the deformation of the bimetals 11, respectively, and thus are offset each other. The operation time of the trip device is constant in all the bimetals 11.

As described above, according to the first embodiment, the guide groove 11a of the bimetal 11 is provided in the thermal dynamic tripping apparatus in which the variation of the amount of deformation of the bimetal 11 is offset by adjusting the amount of movement of the adjuster 12. Is formed in a tapered shape in which the opening side is wide, particularly the opening side is gradually expanded, so that the arcuate portion 12c of the adjuster 12 can be easily mounted on the guide groove 11a, and the assembling workability can be improved. it can. Further, the engagement hole 11b of the bimetal 11 is inserted into the guide groove 11a.
Since the side is formed to be wide, the engagement of the hook-shaped portion 12a of the adjuster 12 with the engagement hole 11b is facilitated, and the assembling workability can be further improved.

Although not described in the above configuration, the bimetal 11 can also be formed by punching. In this case, if the punching side is arranged on the side facing the trip bar 13, The burr generated on the side opposite to the punching occurs on the side of the bow 1 of the adjuster 12.
Since the sliding of 2c is not hindered, the workability of the gap adjustment can be improved. In addition, hook-shaped part 12
a, an adjuster 12 comprising an arcuate portion 12c and a contact portion 12d
Since the projection 12b is formed at the tip of the arcuate portion 12c,
The posture of the adjuster 12 can be easily held, and the workability of the gap adjustment can be improved.

Further, since the portion of the abutting portion 12d of the adjuster 12 that abuts on the trip bar 13 is formed in a flat shape, the abutting property in the case where the trip bar 13 is a round bar is improved, and the trip bar 13 is securely held. To be able to work,
The workability of the gap adjustment can be improved. or,
Although the above-described gap adjustment method has been described for the case of a single pole, when adjusting the gap with a plurality of poles, energization to each bimetal 11 is performed simultaneously, and the adjustment of the adjuster 12 and the bimetal 11 can be simultaneously performed by welding. By doing so,
Since the welding time is the same as in the case of a single pole, the workability of gap adjustment can be improved.

Embodiment 2 FIG. FIG. 7 is a front view showing the structure of the bimetal of the thermal trip device according to Embodiment 2 of the present invention. In the figure, reference numeral 21 denotes a rectangular bimetal formed by stamping a plate-like member, and a guide groove 21 opening at one end on a side in contact with a trip bar (not shown).
a is an engagement hole 21b formed on the guide groove 21a side so as to be wide at a predetermined distance from the guide groove 21a in the longitudinal direction.
However, mounting holes 21c are formed on the other end side, respectively.
One end side is on both sides 21d, 21 around the guide groove 21a.
The height e is different. Then, the hook-shaped portion 12 of the adjuster 12 is similar to that in the first embodiment.
a is engaged with the engagement hole 21b, and the
Is inserted into the guide groove 21a to form a thermal trip device.

As described above, according to the second embodiment, the heights of both sides 21d and 21e around the guide groove 21a at one end of the bimetal 21 are formed differently, so that the adjuster 12 To the low side 21
If it is inserted from the d side, the side 2 on the higher side
Since it is guided by 1e and can be easily inserted into the guide groove 21a, the assembling workability can be improved.

Embodiment 3 FIG. FIG. 8 is a front view showing a configuration of a bimetal adjuster of the thermal trip device according to Embodiment 3 of the present invention. In the figure, reference numeral 22 denotes a hook-like portion 22a which can be engaged with the engaging hole 11b of the bimetal 11 as in the first embodiment at one end, and slides in the guide groove 11a of the bimetal 11 at the other end. It is formed so as to connect the hook-shaped portion 22c, the hook-shaped portion 22a, and the arc-shaped portion 22c, each of which has a projection 22b that is rotatable around the hook-shaped portion 22a and that regulates sliding at the distal end. As shown in the figure, the adjusters each have a contact portion 22d that can contact the trip bar 23 with a protrusion.
, And the bimetal 11 is incorporated into the main body by screwing through the mounting hole 11c, thereby forming a thermal trip device.

As described above, according to the third embodiment, since the portion of the abutting portion 22d of the adjuster 22 that abuts on the trip bar 23 is formed in a protruding shape, the contact property when the trip bar 23 is plate-shaped is provided. And the trip bar 23 can be operated reliably, so that the workability of the gap adjustment can be improved.

Embodiment 4 FIG. 9 is a perspective view for explaining the operation of the gap adjustment method of the thermal trip device according to Embodiment 4 of the present invention. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 24 denotes a holding member for fixing and holding the trip bar 13, and a plurality of holding members are arranged at predetermined positions of the trip bar 13.

According to the fourth embodiment, when the trip bar 13 is held and fixed at a plurality of positions by the holding member 24 as described above, and the gap is adjusted with a plurality of poles as shown in FIG. The current is supplied to the bimetal 11 while being shifted by a fixed time, and the adjuster 12 is fixed to the bimetal 11 by welding while being shifted by the fixed time.

As described above, according to the fourth embodiment, the energization of each bimetal 11 is performed with a certain time shift, and the welding for fixing the adjuster 12 to the bimetal 11 is performed with a certain time shift. Since only one welding device for fixing can be used, manufacturing equipment cost can be reduced, and the trip bar 13 is held at a plurality of positions by the holding member 24. Therefore, the posture and the position of the trip bar 13 can be stably held, so that the gap can be adjusted with high accuracy.

[0037]

As described above, according to the first aspect of the present invention, the guide groove formed to be open at one end on the side contacting the trip bar, and the guide groove at a predetermined interval in the longitudinal direction. A bimetal having an engaging hole formed by the above-mentioned method, one end of the bimetal is engaged with the engaging hole, and the other end slides in the guide groove around the engaging hole to rotate in a direction opposite to the deformation of the bimetal. Since the opening side of the guide groove is formed to be wide in a thermodynamic tripping device having an adjuster which is movable and is fixed to the bimetal in a state where the adjuster is abutted against the trip bar by the deformation and pushed back. It is possible to provide a thermal expulsion device that can easily mount the bimetal in the guide groove and can improve the assembling workability.

According to a second aspect of the present invention, in the first aspect, since both side surfaces of the guide groove are formed in a tapered shape, a thermal dynamic trip device capable of further improving the assembling workability. Can be provided.

According to the third aspect of the present invention, a guide groove formed at one end on the side in contact with the trip bar, and a member formed at a predetermined distance from the guide groove in the longitudinal direction. Bimetal having a mating hole, one end side is engaged with the engaging hole, and the other end side can rotate in the opposite direction to the deformation of the bimetal by sliding in the guide groove around the engaging hole, and One end of the bimetal is formed so that the height on both sides of the guide groove is different from the center of the guide groove, with the adjuster fixed to the bimetal in a state where it abuts on the trip bar due to deformation and is pushed back. Therefore, it is easy to mount the bimetal in the guide groove of the adjuster, and it is possible to provide a thermal trip device capable of improving the assembling workability.

According to a fourth aspect of the present invention, a guide groove formed at one end on the side in contact with the trip bar, and a member formed at a predetermined distance from the guide groove in the longitudinal direction. Bimetal having a mating hole, one end side is engaged with the engaging hole, and the other end side can rotate in the opposite direction to the deformation of the bimetal by sliding in the guide groove around the engaging hole, and Since the guide groove side of the engaging hole is formed wider in the thermal expulsion device having the adjuster fixed to the bimetal in a state where the adjuster abuts on the trip bar and is pushed back by deformation, the engagement of the bimetal of the adjuster is increased. It is possible to provide a thermal trip device that can be easily engaged with the mating hole and can improve the assembling workability.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the bimetal is formed by punching and the punched side is arranged so as to face the trip bar. A thermal excursion device capable of improving the workability of the gap adjustment without interfering with the sliding in the guide groove can be provided.

According to the sixth aspect of the present invention, the guide groove is formed at one end on the side contacting the trip bar, and the guide groove is formed at a predetermined distance from the guide groove in the longitudinal direction. Bimetal having a mating hole, one end side is engaged with the engaging hole, and the other end side can rotate in the opposite direction to the deformation of the bimetal by sliding in the guide groove around the engaging hole, and In a thermal trip device having an adjuster fixed to the bimetal in a state where the adjuster abuts on the trip bar and is pushed back by deformation, the adjuster has a hook-like portion which can be engaged with an engagement hole of the bimetal on one end side. On the other end side, a bow-shaped part that can slide around the hook-shaped part by sliding in the guide groove of the bimetal,
To provide a thermal trip device capable of improving assembling operability since it has a contact portion formed so as to connect a hook-shaped portion and an arc-shaped portion and can contact a trip bar. Can be.

According to the seventh aspect of the present invention, in the sixth aspect, since the projection for restricting the sliding is formed at the tip of the arcuate portion of the adjuster, the attitude of the adjuster can be easily maintained. Thus, a thermal trip device capable of improving the workability of gap adjustment can be provided.

According to the eighth aspect of the present invention, in the sixth aspect, the portion of the adjuster that comes into contact with the trip bar at the contact portion is formed in a projecting shape, so that the plate-like trip bar can be reliably operated. And a thermal trip device capable of improving the workability of the gap adjustment can be provided.

According to the ninth aspect of the present invention, in the sixth aspect, the portion of the adjuster that comes into contact with the trip bar is formed in a planar shape, so that the rod-shaped trip bar can be reliably operated. A thermal trip device capable of improving the workability of the gap adjustment.

According to a tenth aspect of the present invention, there is provided a method for adjusting a gap of a thermal dynamic trip device according to any one of the first to ninth aspects, wherein the step of engaging the adjuster with the bimetal includes the steps of: A step of facing the trip bar via a predetermined gap, a step of applying a predetermined current for a predetermined time,
The gap adjustment method of the thermal trip device includes the step of fixing the adjuster to the bimetal while the contact portion of the adjuster abuts on the trip bar due to the current being applied and the adjuster abuts against the trip bar while being pushed back and moved. At the same time, a plurality of poles are energized at the same time and simultaneously fixed to the bimetal, so that the fixing time can be shortened and the workability of the gap adjustment device can be improved. An adjustment method can be provided.

According to an eleventh aspect of the present invention, there is provided the gap adjusting method for a thermal trip device according to any one of the first to ninth aspects, wherein the step of engaging the adjuster with the bimetal includes the steps of: A step of facing the trip bar via a predetermined gap, a step of applying a predetermined current for a predetermined time,
The gap adjustment method of the thermal trip device includes the step of fixing the adjuster to the bimetal while the contact portion of the adjuster abuts on the trip bar due to the current being applied and the adjuster abuts against the trip bar while being pushed back and moved. In this method, a current is applied to a plurality of poles at a fixed time interval, and the electrodes are fixed to the bimetal at a fixed time interval, so that the cost of the fixing equipment can be reduced, and the workability of the gap adjustment can be improved. A possible method of adjusting the gap of the thermal trip device can be provided.

According to the twelfth aspect of the present invention, in the tenth or eleventh aspect, the trip bar is fixed at a plurality of locations and the power is supplied to fix the adjuster to the bimetal. Further, it is possible to provide a gap adjusting method for a thermal trip device capable of stably holding a position and performing accurate gap adjustment.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of a thermal trip device according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing a configuration of a bimetal in FIG.

FIG. 3 is a perspective view showing a configuration of an adjuster in FIG.

FIG. 4 is a perspective view showing a state where the adjuster is engaged with the bimetal.

FIG. 5 is a front view showing a state in which a contact portion of an adjuster is in contact with a trip bar.

FIG. 6 is a process diagram for explaining a gap adjusting method of the thermal trip device in FIG. 1;

FIG. 7 is a front view illustrating a configuration of a bimetal of a thermal trip device according to Embodiment 2 of the present invention.

FIG. 8 is a front view showing a configuration of a bimetallic adjuster of a thermal trip device according to Embodiment 3 of the present invention.

FIG. 9 is a perspective view for explaining the operation of the gap adjusting method of the thermal trip device according to Embodiment 4 of the present invention.

FIG. 10 is a process chart for explaining a gap adjusting method of a conventional thermal trip device.

[Explanation of symbols]

11,21 Bimetal, 12,22 Adjuster, 12
a, 22a Hook, 12b, 22b Projection, 12
c, 22c arcuate part, 12d, 22d contact part, 13,
23 trip bar, 14 thermal trip device, 11
a, 21a Guide groove, 11b, 21b Engagement hole, 21
d, 21e side part, 24 holding member.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Akita 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Nobuaki Miya 2-3-2, Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Hiroyuki Kakisako 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Satoru Satoru 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) in Denki Co., Ltd. 5G030 FC03 XX13

Claims (12)

[Claims] A bimetal having a guide groove formed at one end on the side contacting the trip bar, and an engagement hole formed at a predetermined distance from the guide groove in a longitudinal direction; One end is engaged with the engaging hole, and the other end slides in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and the trip is caused by the deformation. A thermodynamic tripping device comprising an adjuster fixed to the bimetal in a state of being brought into contact with the bar and pushed back, wherein the guide groove is formed to have a wide opening side; . 2. The thermal trip device according to claim 1, wherein both side surfaces of the guide groove are formed in a tapered shape. 3. A bimetal having a guide groove formed at one end on a side abutting on a trip bar, and an engagement hole formed at a predetermined distance from the guide groove in a longitudinal direction; One end is engaged with the engaging hole, and the other end slides in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and the trip is caused by the deformation. In a thermal expulsion device having an adjuster fixed to the bimetal in a state where the bimetal is in contact with the bar and pushed back, one end of the bimetal is formed to have different heights on both sides around the guide groove. A thermal trip device characterized by being performed. 4. A bimetal having a guide groove formed at one end on the side contacting the trip bar, and an engagement hole formed at a predetermined distance from the guide groove in a longitudinal direction; One end is engaged with the engaging hole, and the other end slides in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and the trip is caused by the deformation. In a thermodynamic trip device having an adjuster fixed to the bimetal in a state of being pushed back by contacting a bar, the engagement hole is formed so that the guide groove side is wide. Trip device. 5. The thermal dynamic trip device according to claim 1, wherein the bimetal is formed by punching, and the punching side is arranged to face the trip bar. 6. A bimetal having a guide groove formed at one end on a side contacting with a trip bar, and an engagement hole formed at a predetermined distance from the guide groove in a longitudinal direction; One end is engaged with the engaging hole, and the other end slides in the guide groove around the engaging hole so as to be rotatable in a direction opposite to the deformation of the bimetal, and the trip is caused by the deformation. In a thermodynamic trip device having an adjuster fixed to the bimetal in a state where the adjuster is abutted against the bar and pushed back, the adjuster has a hook-like portion which can be engaged with an engagement hole of the bimetal on one end side. The other end of the trip bar is formed so as to slide in the guide groove of the bimetal and rotate about the hook and connect the hook and the bow. It is characterized by having a contact part that can contact with And thermal trip device. 7. The thermal trip device according to claim 6, wherein a protrusion for restricting sliding is formed at a tip of the arcuate portion of the adjuster. 8. The thermal trip device according to claim 6, wherein a portion of the abutting portion of the adjuster that abuts on the trip bar is formed in a projecting shape. 9. The thermal trip device according to claim 6, wherein a portion of the abutting portion of the adjuster that abuts on the trip bar is formed in a planar shape. 10. A step of engaging the adjuster with the bimetal, a step of causing the contact portion to face the trip bar via a predetermined gap, a step of applying a predetermined current for a predetermined time, and a step of applying the predetermined current to the bimetal. The gap adjusting method of the thermal trip device includes a step of fixing the adjuster to the bimetal in a state in which the abutting portion of the adjuster abuts on the trip bar while being deformed and pushed back and moved. 10. The method for adjusting a gap of a thermal trip device according to claim 1, wherein a plurality of poles are simultaneously energized and simultaneously fixed to the bimetal. 11. A step of engaging the adjuster with the bimetal, a step of causing the contact portion to face the trip bar via a predetermined gap, a step of applying a predetermined current for a predetermined time, and a step of applying the predetermined current to the bimetal. The gap adjusting method of the thermal trip device includes a step of fixing the adjuster to the bimetal in a state in which the abutting portion of the adjuster abuts on the trip bar while being deformed and pushed back and moved. 10. The thermal trip device according to claim 1, wherein a current is supplied to the plurality of poles while being shifted by a predetermined time, and is fixed to the bimetal while being shifted by the predetermined time. Gap adjustment method. 12. A method for adjusting a gap of a thermal trip device according to claim 10, wherein a current is applied while the trip bar is fixed at a plurality of positions, and the adjuster is fixed to the bimetal.