JP2000253628A - Assembled rectifier assembling jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an assembled rectifier assembling jig easily usable and improve the yield of an assembled rectifier by constituting the jig only of a mechanical structure and assembling a rectifier without removing an assembled body from the jig until a finished product is sprang out by installing a cylindrical core and inserting a plurality of contact fittings, and then, putting a clamping washer on and lowering the washer to a barrel section. SOLUTION: An assembled rectifier assembling jig A is constituted in such a way that, when a contact fitting 2 is inserted into the front section of a core body 1 and the left-side lever 11 of a lower enclosure 4 is pushed, a rear retaining plate 6 advances and approaches the outer peripheral surface of the core body 1 on an assembling pan 7 by leaving a margin for the contacting fitting 2 between the outer peripheral surface of the core body 1 and the retaining plate 6. When an indented ring 12 is turned, the core body 1 rotates together with the inserted contact fitting 2 and the fitting 2 gets in the space between the outer periphery of the core body 1 and the retaining plate 6 and is held on the outer peripheral surface of the core body 1. When a clamping washer is temporarily put on and a handle C is pressed down after a plurality of contact fittings is inserted, the retaining plate 6 automatically retreats and the washer 3 is lowered to a barrel section by means of an upper enclosure 5. When the handle C is then released, an assembled body is sprang out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling jig for an assembling commutator used in a micro DC motor.

[0002]

2. Description of the Related Art A commutator for a small motor needs to withstand high heat generated by spark discharge and friction caused by sliding of a brush.
Fitting and fixing pipe-shaped copper or silver alloy plate etc.,
The so-called thermosetting resin molding, in which a base is made by the transfer method of outsert, the outer periphery of the base is turned by lathe processing to eliminate runout, and the slit groove is milled around the circumference to create multiple contacts (contacts). And the machining method was the mainstream. However, since the number of processing steps is large and time-consuming, it has not been possible to meet the demand for cost reduction. At that time, an assembly type commutator was born, and with the advent of an anisotropic thermoplastic engineering plastic with a high softening point, it was able to withstand the heat generated by the commutator sufficiently, was relatively accurate, had few burrs, and was mass-produced. Around the core (holder) manufactured by injection molding, insert a plurality of contact fittings made of copper or silver alloy plate with an arc-shaped cross section, insert a tightening washer from the head, and hang down to the trunk to fix it I do. This method was a step in terms of accuracy due to the time-consuming injection molding of a thermosetting resin and the reduction of machining steps, but it has enabled considerable cost reduction.

After that, a core body (holder) formed by injection molding of a thermoplastic resin, a contact fitting formed by press working,
And improved accuracy of the tightening washer, concentricity 50μ
m, the roundness was evaluated until it could pass an accuracy of about 15 μm or less. However, the yield after assembly remains a problem. Also,
Small DC motors tend to be increasingly miniaturized. In particular, in the case of motors used for portable communication devices or cameras, which are rapidly spreading in recent years, there is a remarkable demand for ultra-small size due to the fate of small size and light weight. However, recently, it has been reduced to less than half of φ4. Therefore, the outer diameter of the commutator surface of the commutator used is as small as φ1.3 or less, and it is difficult to automate the assembly due to the fineness. Even if the automatic assembly is performed, deformation due to handling of parts in the process, etc. As a result, the defect rate is high, the yield is poor in terms of appearance and dimensional accuracy, and no epoch-making method to be improved can be found. Therefore, at present, it relies on manual assembly processing and 100% inspection.

[0004] In the case of an ordinary manual assembling operation, first, a cylindrical core body (holder) is inserted into the tip of a pencil-shaped shaft, and a plurality of contact fittings are provided around the cylindrical core body with an appropriate holding force. Insert it into the groove where is obtained, hold it downward, put it on the tightening washer, and temporarily fit the tightening washer. Then, the temporarily fitted assembly product is put on a press machine, and a fastening washer is hung down at a predetermined position and fixed. In this case, even if the maintenance of the dimensional accuracy of the contact fittings is strictly controlled, variation is likely to occur in how to insert the contact fittings into the grooves of the core body, and when the fittings are temporarily fitted by switching downwards, The terminal may be bent or the contact fitting may drop, thereby slowing the assembly pitch, lowering the quality, and lowering the yield.

[0005]

As described above, it is difficult to fully automate the system, and it is necessary to rely on manual assembling. In order to remove the skin and eradicate defects, simply supply the parts with tweezers, and from the supply of the parts to the removal of the finished product from the jig, do not remove and insert it at all. Tools are desired. or,
You need to avoid relying on various electronic devices, electromagnetic equipment, and commercial energy to work in any remote mountainous area. And without the difference in skill level, even if the work efficiency is low at first, it quickly improves,
It is necessary to provide ease of use that does not cause defects even in unstable work conditions, and ergonomic considerations that do not cause fatigue even after long hours of manual work.

The present invention operates under only the above-mentioned conditions, that is, only with a mechanical structure, and keeps the same assembly in the same posture from the supply of components to the removal of the assembly, and pulls out or inserts the product in a downward direction. An object of the present invention is to provide an easy-to-use assembling jig for an assembling commutator in which an assembly is automatically ejected without being replaced.

[0007]

Means for Solving the Problems A plurality of arc-shaped contacts having terminal portions are provided around a cylindrical core (holder) of a resin molded product having an insulating property, a high melting point and a high softening point. In a jig for an assembling type commutator, a metal fitting is provided with a slit portion between respective contact fittings, fitted and inserted around the circumference thereof, and the body is fastened and fixed with a fastening washer. From the installation of the body (holder), fit and insert a plurality of contact fittings, put a tightening washer on the body and complete it, without pulling out the assembly from the jig, do not pull out the assembly at all, A series of operations can be performed.
(2) Rely on commercial energy supply, various electronic devices, electronic equipment, etc. All are composed only of a mechanical structure. (3) After inserting the first contact fitting, when the core is turned to insert the next contact fitting, the rear support is projected from the rear side with an appropriate interval left between the circumferential surfaces of the core. Thus, even if the assembly body is rotated while the contact fitting is being inserted, the contact fitting is held and does not fall off the core body. (4) When the tightening washer is mounted and the upper housing is lowered, the rear support is automatically retracted and fixed, and when the handle of the assembly press that rises upward by the biasing force of the spring is released, the tightening washer drops. The upper housing is lifted, and at the same time, the assembly tray is popped up, and the assembly is automatically flipped out of the passage to the rear.
(5) The entire assembly jig and assembly press are inclined about 40 degrees later so as to be optimal for the assembly operation.

[0008]

As shown in FIG. 1, guide rods 9 and 10 fixed vertically to the upper surface of both sides of the upper surface of the lower housing 4,
A rod cam 8 which penetrates the upper housing 5 and is inserted into an insertion hole vertically provided on the lower surface thereof, and is fixed to the rear side of the lower surface of the upper housing 5 by hanging, is provided on the lower housing 4. Are inserted into the inserted insertion holes, so that both can move with each other. In the rest state in which the handle C of the hand press B is raised, the upper housing 5 is raised, and the assembly plate 7 provided in front of the upper surface of the lower housing 4 hangs down, and the core (holder) 1 is lowered. Only the pin 7a of an integral structure adapted to the shaft hole and the rotating ring 7b for turning the core protrude. (1) Insert the core body 1 into the pin 7a, insert the first contact fitting 2 into the front surface thereof with tweezers or the like, and press the lever 11 on the left side of the lower housing 4 to push the rear support biased forward by the spring. The plate 6 moves forward on the assembly plate 7 behind the circumferential surface of the core 1 during the insertion of the contact fittings, leaving a gap into which the contact fittings 2 can enter. Then, when the toothed wheel 12 on the front of the lower housing 4 is turned, the core 1
The contact fitting 2 is rotated while holding the contact fitting 2 on the circumferential surface together with b, and is sandwiched between the circumferential surface of the core body 1 and the rear support plate 6. Next, the next contact fitting 2 is inserted into the front of the core 1. As described above, the same operation is repeated a plurality of times, and after all the contact fittings have been inserted into the circumferential surface of the core body 1, the fastening washer 3 is placed thereon and temporarily fitted, and the handle C is lowered. The rear support plate 6 is retracted and fixed,
The upper housing 5 descends, and its nose 5a hangs down, and the fastening washer 3 hangs down to the terminal surface of the body of the contact fitting 2 around the circumference, thereby completing the commutator assembly. Here, when the handle C is released, the handle C is raised by the urging force, the upper housing 5 is raised and separated, and at the same time, the assembly 7 is popped out, and the assembly is flipped out. The above series of operations is performed without removing the in-assembly product from the assembly dish 7.

(2) The above series of operations, ie, lever 1
The downward fixing operation of the rear support plate 6 advanced by pressing 1 when the upper housing 5 is lowered and the assembling operation of the assembly plate 7 when the upper housing 5 is lifted down from the upper housing 5. The control rod cam 8 which enters the lower housing 4 and moves with the piston moves only by one control rod cam 8. That is, electronic sensors,
No electromagnetic devices such as electromagnetic solenoids are used, and no power supply or other commercial energy is required.

(3) When the first contact fitting 2 is inserted into the front of the core body (holder) 1 with tweezers or the like and the lever 11 on the left side of the lower housing 4 is pushed, the rear support appropriately urged by the spring is provided. The plate 6 moves forward, and comes close to the outer peripheral surface of the core body 1 on the assembly plate 7 while the contact fitting 2 is being inserted, leaving a margin for the contact fitting 2 to enter. Then, when the knurled wheel 12 on the front upper part of the lower housing 4 is turned, the core 1 with the contact fitting 2 on the assembly plate 7 rotates together with the contact fitting 2, and the contact fitting 2 is inserted around the outer periphery of the core. The contact fitting 2 is held between the outer peripheral surface of the core body 1 and the rear holding plate 6, and the contact fitting 2 is held by the outer peripheral surface of the core body 1 and does not drop.

(4) After all of the plurality of contact fittings 2 have been inserted, the tightening washer 3 is temporarily fitted thereon and the handle C of the hand press B is pressed down, and the rear holding plate 6 retreats from the assembling body. The upper case 5 is fixed away from the upper case 5 and hangs down, and the fastening washer 3 temporarily fitted on the assembly plate 7 is pushed down from above by the nose 5a. Tightening washer 3
Is pushed down to the torso, and the assembly is completed.
When the upper case 5 is released, the upper case 5 is lifted by the urging force of the spring of the hand press B, and all parts of the assembly plate 7 jump up to pop out the finished product. Automatically droop.

(5) The jig housing A, together with the main shaft D of the hand press body, is inclined at an angle of 35 to 45 degrees, preferably about 40 degrees with respect to the horizontal plane, so that the working angle is ergonomically optimal. The finished product pops out and falls naturally into the rear storage box due to this inclination.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the assembling jig A includes guide lots 9 and 1 directed upward at both ends of the upper surface.
0, a lower housing 4 of a metal block having a hole for receiving a control rod cam 8 hanging down from a lower portion of the upper housing 5, and a through hole through which the guide rods 9, 10 are inserted to allow piston movement. And the upper part 5 of the metal block having the control rod cam fixed downward and the front surface thereof having a fastening washer 3 and a press-fitting nose at the front side. As shown in FIG. It is used by being fixed to a hand press to which an urging force is given in the ascending direction. The upper housing 5 moves up and down in opposition to the upper surface of the lower housing 4. The outer diameters of the sliding surfaces of the contact fittings 2, 2,... Are inserted into the lower surface of the protruding portion 5a of the nose surface of the upper housing in order to press the fastening washer 3 into the core body 1 surrounded by the contact fitting 2. A relief hole is provided on the upper surface of the lower housing 4 just below the relief hole, as shown in FIG.
There is provided a pin 7a that can be turned by the shaft 2 and into which the shaft hole of the core body 1 can be inserted, and an assembling plate portion 7 having a rotating ring seat 7b. The assembling plate portion 7 is configured to jump up together with the outer peripheral portion 7c at the final stage of the ascent of the upper housing 5 in order to fly off the commutator assembly after the assembly is completed.

A holding plate 6 for holding the contact fitting 2 on the outer periphery of the core body 1 during assembly is provided on an upper surface of the lower housing 4 and a rear portion of the assembling plate 7, and slides in the front-rear direction. , Is urged forward by spring pressure, and is retracted and fixed rearward depending on the position of the control rod,
Further, when the lever 11 is pressed, the fixing is released, and the contact fitting being assembled is held from behind. FIG.
As shown in the figure, the upper housing 5 is provided with a block with a dovetail groove which is inserted into and fixed to the upper and lower arms of the hand press. , 10, the piston cam moves up and down, and at the same time, the rod cam 8 also protrudes into the lower housing.
The bottom of the lower housing and the support of the hand press are inclined rearward at an angle of about 42 degrees with respect to the horizontal plane.

As the molding material of the core body 1 shown in FIG. 2, an anisotropic engineering plastic (trade name: Sumitomo Chemical Econol E, etc.) is used, the molding conditions are 300 to 360 ° C., and the softening point is about 200 to 230 ° C. . In this case, sufficient durability can be ensured against frictional heat due to no-load high-speed continuous operation of the motor and heat generated by spark discharge generated on the contact. The material of the contact fitting 2 is an Ag-Cu-Cd alloy-based material having a thickness of 0.15 mm and a surface of which is clad with an Au-Ag alloy of about 1 µm, and is precisely press-formed into an arc-shaped cross section. The fastening washer 3 is obtained by punching a fiber sheet K-57 having a wall thickness of 1.4 to 1.6 mm (humidity: 45%, 20 ° C.) into a ring shape.

In the rest state, the handle C of the hand press B faces upward at the upper limit due to the biasing force of the spring, the upper housing 5 is separated from the lower housing 4, and the rear holding plate 6 is retracted. In a fixed state at the retracted position, the outer peripheral portion 7d of the assembling dish 7 is lowered downward and is substantially flush with the upper surface of the lower housing 4, as shown in FIG. In this state, the core 1
Into the pin 7a of the assembly tray 7. Next, the first contact fitting 2 is inserted into any one groove on the outer periphery of the core 1.
Next, when the lever 11 is pushed, the rear holding plate 6 is slid forward by the urging force of the spring, and comes close to the circumferential surface of the core body 1 with a margin for the contact fitting 2 to enter. Then, when the toothed ring 12 shown in FIG. 1 is turned, the inserted contact fitting 2 turns backward, and the contact fitting 2 is held on the circumferential surface of the core body 1 by the rear holding plate 6. Subsequently, the next contact fitting is inserted. Similarly, the knurled wheel 12
And turning the contact fitting to the rear side to complete the insertion of the entire circumference. When the tightening washer 3 is temporarily fitted to the apex and the handle C is pushed down, the rear holding plate 6 is automatically retracted and fixed. The fastening washer 3 is pressed into the body. When the handle C is gently released, the upper housing 5 is lifted and separated by the urging force of the hand press, and in the final stage, the assembly tray 7 is projected together with the outer peripheral portion 7c to flip the completed commutator assembly. Skip. The assembly falls down the groove on the upper surface of the lower housing 4 and is housed in a storage box provided on the rear side.

As described above, the present invention keeps the same posture from the supply of the parts to the removal of the commutator assembly, and does not remove the assembly in progress from the jig. Further, it is constituted only by a mechanical structure and does not depend on commercial energy, various electronic devices, electromagnetic devices, and the like. There is no fear that the contact fittings already inserted during the assembly may fall. When the hand press is put into the rest state, the finished product automatically jumps out.
Then, the entire jig is inclined rearward so as to have an optimum angle for the work.

[0018]

As described above, according to the present invention, (1) after installation of a core (holder), a plurality of contact fittings are fitted and inserted, and a tightening washer is temporarily fitted to the body. Until the completed commutator is ejected and stored in the storage box, a series of operations can be completed in the same posture without removing the assembly at all, while inserting it into the jig. It is not necessary to control so strictly to maintain the accuracy for preventing the fitting of the contact fitting into the insertion portion from being loose or floating too tight. Further, the insertion contact fitting does not come off during the assembly, the terminal is not bent or displaced, and the yield rate is remarkably improved. (2) Since everything is composed only of a mechanical structure, there is no need for commercial energy (for example, commercial power supply, battery, etc.), various electronic devices (for example, sensors, etc.), and electronic equipment (for example, solenoids, motors, etc.). It can be used in inconvenient mountainous remote areas. (3) The contact metal fittings being assembled can be held on the core by the rear support, and are automatically retracted before press-fitting the washer, so that the contact metal fittings being assembled fall off or bend. Nothing.
(4) After assembling, the handle of the hand press is released, and at the same time, the assembling tray pops out, pops out the assembly, and can be automatically dropped to the rear and stored in the storage box, so that management is easy. (5) Since the entire jig is inclined backward together with the hand press, the assembling work can be easily performed ergonomically and fatigue can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of an assembly type commutator assembly jig of the present invention.

FIG. 2 is an external view of a commutator during assembly and an assembly dish according to the present invention.

FIG. 3 is an external view when the jig of the present invention is attached to a hand press.

[Explanation of symbols]

 Reference Signs List A assembly type commutator assembly jig B hand press C handle D support 1 core body (holder) 2 contact fitting 3 tightening washer 4 lower housing 5 upper housing 6 rear holding plate 7 assembly plate 8 control rod cam 9 right guide rod 10 left guide rod 11 rear holding plate release lever 12 knurl

Claims (5)

[Claims] 1. An outer peripheral surface of a cylindrical core (holder) of a resin molded product having an insulating property, a high melting point and a high softening point temperature,
An assembling commutator in which a plurality of arc-shaped contact fittings with terminals are provided, slits are provided between the contact fittings, fitted and inserted around the circumference, and the body is tightened and fixed with tightening washers. In the assembly jig, from the installation of the core, fitting and inserting a plurality of contact fittings,
An assembly type commutator assembly jig that can perform a series of assembly work without removing the in-assembly body from the assembly jig until the tightening washer is fitted and lowered to the body, and the assembly is flipped out of the assembly jig. . 2. The assembling jig for an assembling type commutator according to claim 1, wherein the assembling commutator is entirely constituted only by a mechanical structure and does not depend on replenishment of commercial energy, various electronic devices, electromagnetic devices, or the like. 3. A contact fitting support for holding a rear contact fitting from the rear when inserting a contact fitting and turning it rearward to insert the next contact fitting, and holding the inserted contact fitting. The jig for assembling a commutator according to claim 1, wherein the jig does not fall. 4. When the upper housing for hanging the washer is lowered, the contact fitting support is automatically retracted, the body is tightened by the washer, the assembly is completed, and the handle of the hand press is opened. The assembly jig of claim 1, further comprising a mechanism for raising the assembly casing by the urging force of the hand press, raising the assembly tray, popping out the assembly, and automatically rolling the assembly to the rear. . 5. In order that the assembling work can be performed in an optimal posture,
The assembly jig of claim 1, wherein the whole is inclined about 40 degrees later.