CA1069204A - Control means for the wire wrapping machine - Google Patents
Control means for the wire wrapping machineInfo
- Publication number
- CA1069204A CA1069204A CA264,642A CA264642A CA1069204A CA 1069204 A CA1069204 A CA 1069204A CA 264642 A CA264642 A CA 264642A CA 1069204 A CA1069204 A CA 1069204A
- Authority
- CA
- Canada
- Prior art keywords
- motor
- spindle
- wire wrapping
- rectifying circuit
- completion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010618 wire wrap Methods 0.000 title claims abstract description 42
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000002441 reversible effect Effects 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 241000272470 Circus Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- VREFGVBLTWBCJP-UHFFFAOYSA-N alprazolam Chemical compound C12=CC(Cl)=CC=C2N2C(C)=NN=C2CN=C1C1=CC=CC=C1 VREFGVBLTWBCJP-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QZIQJVCYUQZDIR-UHFFFAOYSA-N mechlorethamine hydrochloride Chemical compound Cl.ClCCN(C)CCCl QZIQJVCYUQZDIR-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/033—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Control Of Direct Current Motors (AREA)
- Motor And Converter Starters (AREA)
- Stopping Of Electric Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides a control means for the wire wrapping machine comprising a lead wire wrapping spindle, an outer sleeve for turnable supporting the spindle and a dc driving motor accomodated therein and connected to an output of a rectifying circuit for converting the polarity of the current supplied to the motor on completion of the wire wrapping operation to supply an inverse current to the motor for a short period to permit the motor to rotate reversely so that the spindle is positioned through a ratchet at a predetermined position in relation to the outer sleeve.
The present invention provides a control means for the wire wrapping machine comprising a lead wire wrapping spindle, an outer sleeve for turnable supporting the spindle and a dc driving motor accomodated therein and connected to an output of a rectifying circuit for converting the polarity of the current supplied to the motor on completion of the wire wrapping operation to supply an inverse current to the motor for a short period to permit the motor to rotate reversely so that the spindle is positioned through a ratchet at a predetermined position in relation to the outer sleeve.
Description
- ~069204 - This invention relates to an improved wire wrapping machine and more particularly to a control means for a wire wrapping machine which is so constructed that a spindle for wrapping a lead wire of the wire wrapping machine is auto-matically and reversely rotated to stop at the fixed position in relation to a sleeve supporting the spindle therein.
Recently, in order not to damage the components of an electronic circuit, so-called "wire wrapping" has generally been used to connect the components together. In this process, a stripped portion of the lead wire is wrapped tightly without soldering arouna a metal terminal of a circuit element such as an electrolytic condenser or resistor which protrudes through the base circuit plate.
The invention will be described in greater detail with reference to the accompanying drawings in which~
Fig. 1 is a partially opened pictorial view of the wire lead wrapping spindle of the wire wrapping machine and the outer fixed sleeve for turnably receiving the spindle;
Fig. 2 is a pers~ective pictorial view ilIustrative of the lead wire ~eing wrapped tightly at the bar terminal of the circuit element of the lead wire by the wire wrapping - machine;
Fig. 3 is a front elevation of the spindle with the outer sleeve showing the position where the slot of the spindle ` is aligned with the recess of the sleeve;
Fig. 4 is a circuit diagram of the control means of the wire wrapping machine; and Fig. S is a pictorial view of the wire wrapping machine in accordance with the present invention.
A working instrument for effe~ting the wire wrapping - operation is generally called a wire wrapping machine and comprises a lead wire wrapping spindle rotatable by a driving
Recently, in order not to damage the components of an electronic circuit, so-called "wire wrapping" has generally been used to connect the components together. In this process, a stripped portion of the lead wire is wrapped tightly without soldering arouna a metal terminal of a circuit element such as an electrolytic condenser or resistor which protrudes through the base circuit plate.
The invention will be described in greater detail with reference to the accompanying drawings in which~
Fig. 1 is a partially opened pictorial view of the wire lead wrapping spindle of the wire wrapping machine and the outer fixed sleeve for turnably receiving the spindle;
Fig. 2 is a pers~ective pictorial view ilIustrative of the lead wire ~eing wrapped tightly at the bar terminal of the circuit element of the lead wire by the wire wrapping - machine;
Fig. 3 is a front elevation of the spindle with the outer sleeve showing the position where the slot of the spindle ` is aligned with the recess of the sleeve;
Fig. 4 is a circuit diagram of the control means of the wire wrapping machine; and Fig. S is a pictorial view of the wire wrapping machine in accordance with the present invention.
A working instrument for effe~ting the wire wrapping - operation is generally called a wire wrapping machine and comprises a lead wire wrapping spindle rotatable by a driving
2~
~C~6~204 power sourceof an electric motor or an air motor and an outer sheath sleeve for supporting rotatably the spindle therein.
Thespindle 10, as is shown in Fig. 1, is provided at its center with a hole 14 of a predetermined depth for receiving a bar terminal 12 of a circuit element 11 and formed longitudin-ally with a slot 16 on its periphery for holding the lead wire.
This spindle 10 is connected through a clutch means as here-inafter described to the motor accommodated in the wrapping machine. The spindle 10 is contained in an outer sleeve 22 having a somewhat larger inner diameter than that of the spindle and being fixed to the machine.
In the wrapping operation of the lead wire, the stripped portion of the lead wire 24 such as the vinyl wrapped copper wire is inserted into the slot 16, on this step since the spindle 10 is enclosed in the fixed sleeve 22, the lead wire 24 is held by the slot 16 and an inner circu~ferential wall of the sleeve 22 without slipping out, then the bar terminal 12 of the circuit element 11 protruding vertically ~ from the circuit base plate 26 is vertically inserted into -` 20 the central hole : .- ,..~. . .
' :.
":
, . .
-2a-. . .
1~6~Z04 14 of the spindle 10 which is in turn constrained to rotate for the predetermined period by holding the wrapping machine so that the stripped portion of the lead wire 24 is tightly wrapped around the bar terminal 12 as shown in Fig. 2 to obtain a com-plete conductive connection. At the open end of the sleeve 22 there is provided a recess 28 for enabling the wrapping of the lead wire from the base of the bar terminal. To achieve a rapid and continuous wrapping of the lead wire the necessity arises of providing a mechanism in which the spindle 10 when the motor is stopped is returned to a specified position in the sleeve 22 to align an open end of the slot 16 with the recess 28 as shown in Fig. 3-For this purpose, in the conventional wrapping machinea ratchet mechanism (not shown) is incorporated so that when the operation of the spindle 10 is stopped after completion of wrapping of the lead wire 24 the spindle 1~ is turned reversely under the function of the spring for engagement with the ratchet to stay stationarily at the specific position in the sleeve 22. Since, however, the return of elasticity of the spindle when stopped is not sufficient enough and the spindle in a direct connection with the motor receives an excessive load and accordingly the reverse rotation by the elasticity can not be obtained. To resolve this problem, in the conventional wrapping machine a clutch means is arranged between the spindle and the motor driving shaft to release the connection therebetween for decreasing the resistance load against the spindle. However, inevitable use of the clutch means will result :in an increase in thè weight of the machine per se and the cost for manufacturing the machine. Furthermore, when an ac motor is usecl as a power source, the change of rotation is difficult and noisy whereas when compressed air is used as a power -. .: .
source, a high exhc~ust noise is caused owing to the use of a separate compressor.
.
" '-~ . .
z~ :
After intensive studies of the above problems, the inventor has employed a dc mo~or which is conveniently reversible by merèly changing the polarity to apply an inverse voltage thereto for a short period :. .
' '"
: I , ' 1' "" :'".
' ' ~ ~'':''''' .:
' ~ : ,, ",:, : ~. . .
,~
: - 3a - ~ ~ ~: ~
~L0692(~
after cessatlon of the motor with completion of the wire wrapping thereb to turn the motor reversely. m e reversely rotating spindle is eng with a ratchet to stop at a determined position in relation to the outer sleeve. By this arrangement, the clutch means used in the conventional machine to release~ connection between the spindle and the motor becomes unnecessary.
As a substantial manner for applying an lnverse voltage to the motor for a short period, provision is made of a control means in which a first rectlfying circuit and a second rectifying circuit are arranged and the dc motor is connected to the first rectifying circuit and a chargeable and dischargeable condensor of the great capacity ls connected to a motor circult in parallel so that the condenser is charged during the working operation of the motor and after completion of the wire wrapping operation the current supply from the first rectifying circuit to the motor is inter-rupted to shortclrcuit the motor energizing circuit for passing a short current t~erethrough ;to interrupt the operation of the motor while commenc -ing discharge of the condenser so that the discharge ~cltage energized a relay through an amplifying circuit thereby to switch the relay contact cooperative to the relay and inserted in series between the motor and the first rectifying circuit and the inverse current generated by the second recti~ying circuit is supplied to the motor energizing circuit for the discharging period determined by the capacity of the condenser and the dlscharge resistance.
A general obJect of the present invention is to provide a control means for the wire wrapping machine comprising a lead wire wrapping spindle and an outer ~ixed sleeve for rotatably supporting the spindle in which after completion of the wire wrapping operation an inverse current is su plied to a motor ~or the short period to allow the spindle to rotate reversely so that a slot provided in the spindle always comes to a position in allgn ment with a recess provided in the outer sleeve.
.
1~;9;~04 Accordingly, the present invention provides a wire wrapping machine comprising: a lead wire wrapping spindle, an ~, outer sleeve for rotatably supporting the spindle, a d.c. motor, a ratchet coupling said motor to the spindle so as to permit the spindle to rotate freely in the forward direction and to prevent the spindle rotating beyond a predetermined position in ~ .
relation to the outer sleeve when the spindle is rotated in the reverse direction, a first rectifying circuit for supplying current of a given polarity to the motor during the wrapping operation ~.. .
to cause it to rotate in the forward direction, means for supplying current of the opposite polarity to the motor on S
- completion of the wrapping operation to cause it to rotate in the reverse direction until the spindle is in said predetermined position, and means for disconnecting the supply of reverse polarity current from said motor a predetermined short period of time after the completion of said wrapping operation, said short period of time being sufficient to allow the spindle to reach said predetermined position.
The means for supplying the inverse current to the d.c.
motor for a short period inlcudes a first rectifying circuit and a second rectifying circuit and the d.c. motor is connected to the first rectifying circuit whereas a condenser is connected in parallel to the d.c. motor which is shortcircuited by breaking the conductivity with the first rectifying circuit and the .~
condenser is discharged to actuate the relay control circuit ~ -.
.
. thereby to supply the inverse current of the second circuit to the d.c. motor. One of the input terminals of the d.c. motor :
is connected through a motor switch to a positive output of ::
the first rectifying circuit and a negative output of the second : F
rectifying circuit whereas the opposite input.terminal is r switchably connected through a relay contact of the relay control circuit to a negative output of the first rectifying circuit :~
- . ~S~ ; ',.
~' ~
- ~
iO~:;9Zal4 and a positive output of the second rectifying circuit.
Further, the relay control circuit includes a relay which is energized by the discharging current of the condenser and a relay contact cooperative with said relay is inserted in series between the d.c. motor and the first rectifying circuit and connected switchably to the output of the opposite polarity of the second rectifying circuit Other objects and advantages of the invention will become clear by the following detailed description.
In Figure 4, the reference symbol T is a transformer for dropping the voltage of an alternate current supplied from a commercially available power source E to a desired value and to the output of the transformer T are connected a first rectifying circuit 36 and a second rectifying circuit 38 ior obtaining their proper d.c. current through the rectifying elements 32 and 34 such as rectifying diodes selenium and the like. Reference numeral 40 represents a d.c. motor of small type accommodated in a wire wrapping machine 39 and one of the inputs ~INl~ of the motor 40 is connected to a positive or negative output of the first rectifying circuit 36 through motor switch SW3 and a negative output of the second rectifying circuit 38. Another input ~IM2) of the motor 40 is connected switchably to the negative output of the first rectifying circuit 36 and the positive output of the second rectifying circuit 38 through the relay contact RYl_l cooperative with the relay provided in the relay control circuit as hereinafter described.
The relay contact RYl 1 is so constructed that it is connected to the negative output of the first rectifying circuit 36 during the wire wrapping operation ro rotate the motor 40 normally.
ThereiEore, it will be appreciated that when the motor switch SW3 is turned oiEf and the relay contact RYl 1 is connected to the positive output oiE the second rectifying ~ 69Z04 circuit 38 under the operation of the relay circuit, power ;
supply from the first rectifyin~ circuit 36 to the motor 40 is inter-',~
. ~ . . . .
~ 20 ~"'';
'" ;, ` ' : ''~,' ' .
` ' ~'',.''"'"
: ',', .
~ .
-6a- ~
1(;~692~4 rupted and an inverse current is supplied from the second rectifying circuit 38 to the motor 40 to permit the motor to rotate reversely.
In the motor circuit of the rirst rectifying circuit 36, through a diode Dl there is inserted in parallel a chargeable and dischargeable electrolytic condenser E~.of a great capacity so that a voltage Or constant capacity is applied to the condenser EC3 when the motor 40 rotates normally in close of the motor switch SW3. The positive output of the condenser EC3 is connected to a base tern~nal bl of the transistor TRl of the voltage amplifying circuit between an emitter terminal el and a base terminal b2 of the transistor TR2 f the next stage and a variable resistor VRl and a resistor R5 are connected in series. The emitter terminal e2 of the transistor TR2 and the base terminal b3 of a transistor TR3 are connected through the resistor R7 and in the i~put (INl) side of the motor 40 there are connected the resistor R3 connected with the emitter terminal el? a chargeable and dischargeable electrolytic condenser EC4 connected with the base terminal b2, a resistor R6 connected with the emitter terminal e2 and the diodes D3 and D4 connected in series with the e~itter terminal e3. The capacity of the electrolytic condenser EC4 1s smaller than that of the electrolytic condenser EC3. m e positive output o~ the ~irst rectifying circuit 36 is connected to the emitter terminal e3 o~ the transistor TR3 via the resistor R8 and to the positive lead the : collectors Cl, C2 of the transistors TRl~ TR2 with the collector C3 Or the transi~tor TR3 are connected through the relay RYl. The relay contact RYl 1 cooperative with the energized relay RYl is inserted into the circuit so that the input :(IN2) of a motor 40 can be switchably connected to the ~` negative output of the first rectifying circuit 36 and the positive output of the second rectifying circuit 38. me relay contact RYl 2 cooperative with the energi~ed relay RYl is inserted as a constan~ open contact between the positive output of the electrolytic condenser with the base terminal bl of the transistor TRl and the input (INl) line of a motor 40 ' ~ 7 :~69Z~4 through the resistor R2. The diode D2 and the resistor R4 are inserted in parallel between the contact of the relay contact RYl 2 with the resistor R2 and the positive output of the electrolytic condenser EC4.
By this arrangement, when the relay contact RYl 2 is closed by the energizatlon of the relay RYl, the charging voltage of the electrolytic condenser C3 is discharged through the resistor R2 whereas the charging voltage Or the electrolytic condenser ECII is discharged through the resistor R4 and the diode D2. m e motor switch SW3, when the supply of current from the first rectifying circuit 36 to the motor 40 is cut off, shortcircuits the motor circuit to electrically connect the inputs IN
and IN2 f the motor 40.
As briefly illu~trated in Fig.5, the wire wrapping machine thus constructed contains a small dc motor 40 as a driving source and the rotary shaft of the motor 40 is connected to a gearing mechanism 44 with a planet wheel whereas an output shaft of the gearing mechanism is connected to the lead wire wrapping spindle 10 through a ratchet mechanism 45. The spindle 10 rotates normally and reversely in the sleeve 22, and in case of the reverse rotation the spindle 10 is held by a ratchet mechanism 46 at a position where the open end of the lead wire holding slot 16 is aligned with the recess 28 of the sleeve 22 as best shown in Figure 3 In operation of the control means for the wire wrapping machine according to the inventlon, when the bar terminal 12 of the circuit element is vertically inserted into the terminal insertion hole 14 provided in the spindle 10 to close the motor switch SW3, the motor 40 is driven to ~llow the spindle 10 to rotate in the sleeve 22 for tightly wrapping the lead wire (see Fig.2). During this process, the current ~lows throu~h the diode Dl in the regular direction to charge the electrolytic oondenser EC3 until the charging is saturated. When the wrapping operation process is flnished and the switch SW3 is opened, the current supply from the first rectifying clrcuit 36 to the motor 40 is interrupted to shortcircuit the motor simult~neously as the motor switch SW3 is switched to directly conneot ... . . _ . .. .
6~ZO~
the motor inputs INl and IN2, the short current is passed through the motor Llo with application of an electromagnetlc brake to stop actuation of the motor instantly. By opening the motor switch SW3, the discharging current of the electrolytic condenser FC3 flows through the transistor and the resistor R3 to malce the voltage of the resistor R3 equal to the discharge voltage of the electrolytic condenser EC3. Further, the discharge voltage charges the electrolytic condenser ECLI via the variable resistor ~Rl and the resistor R5 and is then applied to the resistors R6, R7 and the diodes D3, D4-During this process, the voltage of the resistor R6 is equal to the charging vol~age of the electrolytic condenser EC4 and compared to the base voltage of the transistor TR3 and when the voltage of the resistor R6 becomes higher than the base voltage, the transistor TR3 operates as a switch to permit the collecter current of the collecter C3 to pass therethrough to energize the relay RYl. m e relay contact RYl 1 cooperative with the energized RYlis switched to break the connection of the input (IN2) of the motor 40 to the negatlve output of the first rectifying circuit and instead to connect the positlve output of the second rectifying circuit 38 with the input terminal (IN2). In other words, the inverse voltage of the converted polarity is supplied to the motor 40 to permit the motor to rotate reversely~ Since, however, the ratchet mechanism 46 is inserted into the spindle 10 connected to the motor 40 the spindle 10 is held at a predetermined position as shown in Fig. 3 to stop actuatlon of the motor. In this operation, the motor is constrained to stop rotation while being applied by the inverse voltage with damages of the motor by burnining or dema~netization, for example. In order to avoid these defects, the relay contact ~ c~operative with the energized relay RYl is closed to discharge the condensers EC3 and EC4 through the resistors R2 and RLI until the voltage thereof comes to below the release voltage of the relay~
RYl so that the relay RYl is sub~ected to the returning operation to switch ~
the relay colltact RYl 1 to the negative output of the ~irst rectifying circuit 36 for di~continuing the application of the inverse voltage while reopening the relay contact RYl 2 to obtain the constant open position. One oycle the wire ~rapping process in the control means is thus finishe .
:
_g_ 1C)6920~L
~ The conversion of the discharging time, i.e., an application time Or the inverse voltage is optionally provided by selectlng the capacitance value of the condenser ECL~ and the constant value of the discharging resistor R4.
When the motor switch ~3 is turned off to stop a further wrapping operation because of the failure of the wrapping operation during the process, since the sequence step of the control circuit is once cancelled for reset, the next wrapping operation can be repeated from the first step by the turning off of the switch. ~rther, by changing the resistance value of the variable resistor VRl the fine ad~ustment of the time in which the motor 4O after its interruption is permitted to rotate reversely by supplying the reverse current thereto may be attained.
As hereinbefore fully described, in accordance with a control means of the present invertion the dc motor acco~lmodated in the wire wrapping machine is applied by the inverse voltage for the short time to reverse the operation of the motor so that the lead wire wrapping spindle ls positioned at a predetenmined locus in relation to the outer fixed sleeve. Accordingly, the clutch mechanism which is indispensable to the conventional machine could be left out with reduction of the cost and decrease of the weight of the machine as well as elimination of the troubles to be caused~by the~clutch mechanism. Moreover, in the control means according to the invention,~the motor clrcuit is shortcircuitted in simultaneous with the interruptlon ..
o~ the current to the motor to instanteneously stop actuation of~the motor ~
and after the complete cessation of the motor, the inverse voltage 1s applied to the motor to avoid the demagnetization of the permanent magnet~fo~rming a stator of the dc motor. ~urther, use of the dc motor results in less nolse on the ~rapplng operation and does not require any compres:or.
While typicalem~od~mentsof the invention have been illustrated by way Or exa~ple ln~the~drawings and partlcularly described,;it wlll~be understood that mod1flcations may be made in the constructlon and that the - invention ls no we~ limlted to the embodiments shown.
-10~
.. . . . . ..
~C~6~204 power sourceof an electric motor or an air motor and an outer sheath sleeve for supporting rotatably the spindle therein.
Thespindle 10, as is shown in Fig. 1, is provided at its center with a hole 14 of a predetermined depth for receiving a bar terminal 12 of a circuit element 11 and formed longitudin-ally with a slot 16 on its periphery for holding the lead wire.
This spindle 10 is connected through a clutch means as here-inafter described to the motor accommodated in the wrapping machine. The spindle 10 is contained in an outer sleeve 22 having a somewhat larger inner diameter than that of the spindle and being fixed to the machine.
In the wrapping operation of the lead wire, the stripped portion of the lead wire 24 such as the vinyl wrapped copper wire is inserted into the slot 16, on this step since the spindle 10 is enclosed in the fixed sleeve 22, the lead wire 24 is held by the slot 16 and an inner circu~ferential wall of the sleeve 22 without slipping out, then the bar terminal 12 of the circuit element 11 protruding vertically ~ from the circuit base plate 26 is vertically inserted into -` 20 the central hole : .- ,..~. . .
' :.
":
, . .
-2a-. . .
1~6~Z04 14 of the spindle 10 which is in turn constrained to rotate for the predetermined period by holding the wrapping machine so that the stripped portion of the lead wire 24 is tightly wrapped around the bar terminal 12 as shown in Fig. 2 to obtain a com-plete conductive connection. At the open end of the sleeve 22 there is provided a recess 28 for enabling the wrapping of the lead wire from the base of the bar terminal. To achieve a rapid and continuous wrapping of the lead wire the necessity arises of providing a mechanism in which the spindle 10 when the motor is stopped is returned to a specified position in the sleeve 22 to align an open end of the slot 16 with the recess 28 as shown in Fig. 3-For this purpose, in the conventional wrapping machinea ratchet mechanism (not shown) is incorporated so that when the operation of the spindle 10 is stopped after completion of wrapping of the lead wire 24 the spindle 1~ is turned reversely under the function of the spring for engagement with the ratchet to stay stationarily at the specific position in the sleeve 22. Since, however, the return of elasticity of the spindle when stopped is not sufficient enough and the spindle in a direct connection with the motor receives an excessive load and accordingly the reverse rotation by the elasticity can not be obtained. To resolve this problem, in the conventional wrapping machine a clutch means is arranged between the spindle and the motor driving shaft to release the connection therebetween for decreasing the resistance load against the spindle. However, inevitable use of the clutch means will result :in an increase in thè weight of the machine per se and the cost for manufacturing the machine. Furthermore, when an ac motor is usecl as a power source, the change of rotation is difficult and noisy whereas when compressed air is used as a power -. .: .
source, a high exhc~ust noise is caused owing to the use of a separate compressor.
.
" '-~ . .
z~ :
After intensive studies of the above problems, the inventor has employed a dc mo~or which is conveniently reversible by merèly changing the polarity to apply an inverse voltage thereto for a short period :. .
' '"
: I , ' 1' "" :'".
' ' ~ ~'':''''' .:
' ~ : ,, ",:, : ~. . .
,~
: - 3a - ~ ~ ~: ~
~L0692(~
after cessatlon of the motor with completion of the wire wrapping thereb to turn the motor reversely. m e reversely rotating spindle is eng with a ratchet to stop at a determined position in relation to the outer sleeve. By this arrangement, the clutch means used in the conventional machine to release~ connection between the spindle and the motor becomes unnecessary.
As a substantial manner for applying an lnverse voltage to the motor for a short period, provision is made of a control means in which a first rectlfying circuit and a second rectifying circuit are arranged and the dc motor is connected to the first rectifying circuit and a chargeable and dischargeable condensor of the great capacity ls connected to a motor circult in parallel so that the condenser is charged during the working operation of the motor and after completion of the wire wrapping operation the current supply from the first rectifying circuit to the motor is inter-rupted to shortclrcuit the motor energizing circuit for passing a short current t~erethrough ;to interrupt the operation of the motor while commenc -ing discharge of the condenser so that the discharge ~cltage energized a relay through an amplifying circuit thereby to switch the relay contact cooperative to the relay and inserted in series between the motor and the first rectifying circuit and the inverse current generated by the second recti~ying circuit is supplied to the motor energizing circuit for the discharging period determined by the capacity of the condenser and the dlscharge resistance.
A general obJect of the present invention is to provide a control means for the wire wrapping machine comprising a lead wire wrapping spindle and an outer ~ixed sleeve for rotatably supporting the spindle in which after completion of the wire wrapping operation an inverse current is su plied to a motor ~or the short period to allow the spindle to rotate reversely so that a slot provided in the spindle always comes to a position in allgn ment with a recess provided in the outer sleeve.
.
1~;9;~04 Accordingly, the present invention provides a wire wrapping machine comprising: a lead wire wrapping spindle, an ~, outer sleeve for rotatably supporting the spindle, a d.c. motor, a ratchet coupling said motor to the spindle so as to permit the spindle to rotate freely in the forward direction and to prevent the spindle rotating beyond a predetermined position in ~ .
relation to the outer sleeve when the spindle is rotated in the reverse direction, a first rectifying circuit for supplying current of a given polarity to the motor during the wrapping operation ~.. .
to cause it to rotate in the forward direction, means for supplying current of the opposite polarity to the motor on S
- completion of the wrapping operation to cause it to rotate in the reverse direction until the spindle is in said predetermined position, and means for disconnecting the supply of reverse polarity current from said motor a predetermined short period of time after the completion of said wrapping operation, said short period of time being sufficient to allow the spindle to reach said predetermined position.
The means for supplying the inverse current to the d.c.
motor for a short period inlcudes a first rectifying circuit and a second rectifying circuit and the d.c. motor is connected to the first rectifying circuit whereas a condenser is connected in parallel to the d.c. motor which is shortcircuited by breaking the conductivity with the first rectifying circuit and the .~
condenser is discharged to actuate the relay control circuit ~ -.
.
. thereby to supply the inverse current of the second circuit to the d.c. motor. One of the input terminals of the d.c. motor :
is connected through a motor switch to a positive output of ::
the first rectifying circuit and a negative output of the second : F
rectifying circuit whereas the opposite input.terminal is r switchably connected through a relay contact of the relay control circuit to a negative output of the first rectifying circuit :~
- . ~S~ ; ',.
~' ~
- ~
iO~:;9Zal4 and a positive output of the second rectifying circuit.
Further, the relay control circuit includes a relay which is energized by the discharging current of the condenser and a relay contact cooperative with said relay is inserted in series between the d.c. motor and the first rectifying circuit and connected switchably to the output of the opposite polarity of the second rectifying circuit Other objects and advantages of the invention will become clear by the following detailed description.
In Figure 4, the reference symbol T is a transformer for dropping the voltage of an alternate current supplied from a commercially available power source E to a desired value and to the output of the transformer T are connected a first rectifying circuit 36 and a second rectifying circuit 38 ior obtaining their proper d.c. current through the rectifying elements 32 and 34 such as rectifying diodes selenium and the like. Reference numeral 40 represents a d.c. motor of small type accommodated in a wire wrapping machine 39 and one of the inputs ~INl~ of the motor 40 is connected to a positive or negative output of the first rectifying circuit 36 through motor switch SW3 and a negative output of the second rectifying circuit 38. Another input ~IM2) of the motor 40 is connected switchably to the negative output of the first rectifying circuit 36 and the positive output of the second rectifying circuit 38 through the relay contact RYl_l cooperative with the relay provided in the relay control circuit as hereinafter described.
The relay contact RYl 1 is so constructed that it is connected to the negative output of the first rectifying circuit 36 during the wire wrapping operation ro rotate the motor 40 normally.
ThereiEore, it will be appreciated that when the motor switch SW3 is turned oiEf and the relay contact RYl 1 is connected to the positive output oiE the second rectifying ~ 69Z04 circuit 38 under the operation of the relay circuit, power ;
supply from the first rectifyin~ circuit 36 to the motor 40 is inter-',~
. ~ . . . .
~ 20 ~"'';
'" ;, ` ' : ''~,' ' .
` ' ~'',.''"'"
: ',', .
~ .
-6a- ~
1(;~692~4 rupted and an inverse current is supplied from the second rectifying circuit 38 to the motor 40 to permit the motor to rotate reversely.
In the motor circuit of the rirst rectifying circuit 36, through a diode Dl there is inserted in parallel a chargeable and dischargeable electrolytic condenser E~.of a great capacity so that a voltage Or constant capacity is applied to the condenser EC3 when the motor 40 rotates normally in close of the motor switch SW3. The positive output of the condenser EC3 is connected to a base tern~nal bl of the transistor TRl of the voltage amplifying circuit between an emitter terminal el and a base terminal b2 of the transistor TR2 f the next stage and a variable resistor VRl and a resistor R5 are connected in series. The emitter terminal e2 of the transistor TR2 and the base terminal b3 of a transistor TR3 are connected through the resistor R7 and in the i~put (INl) side of the motor 40 there are connected the resistor R3 connected with the emitter terminal el? a chargeable and dischargeable electrolytic condenser EC4 connected with the base terminal b2, a resistor R6 connected with the emitter terminal e2 and the diodes D3 and D4 connected in series with the e~itter terminal e3. The capacity of the electrolytic condenser EC4 1s smaller than that of the electrolytic condenser EC3. m e positive output o~ the ~irst rectifying circuit 36 is connected to the emitter terminal e3 o~ the transistor TR3 via the resistor R8 and to the positive lead the : collectors Cl, C2 of the transistors TRl~ TR2 with the collector C3 Or the transi~tor TR3 are connected through the relay RYl. The relay contact RYl 1 cooperative with the energized relay RYl is inserted into the circuit so that the input :(IN2) of a motor 40 can be switchably connected to the ~` negative output of the first rectifying circuit 36 and the positive output of the second rectifying circuit 38. me relay contact RYl 2 cooperative with the energi~ed relay RYl is inserted as a constan~ open contact between the positive output of the electrolytic condenser with the base terminal bl of the transistor TRl and the input (INl) line of a motor 40 ' ~ 7 :~69Z~4 through the resistor R2. The diode D2 and the resistor R4 are inserted in parallel between the contact of the relay contact RYl 2 with the resistor R2 and the positive output of the electrolytic condenser EC4.
By this arrangement, when the relay contact RYl 2 is closed by the energizatlon of the relay RYl, the charging voltage of the electrolytic condenser C3 is discharged through the resistor R2 whereas the charging voltage Or the electrolytic condenser ECII is discharged through the resistor R4 and the diode D2. m e motor switch SW3, when the supply of current from the first rectifying circuit 36 to the motor 40 is cut off, shortcircuits the motor circuit to electrically connect the inputs IN
and IN2 f the motor 40.
As briefly illu~trated in Fig.5, the wire wrapping machine thus constructed contains a small dc motor 40 as a driving source and the rotary shaft of the motor 40 is connected to a gearing mechanism 44 with a planet wheel whereas an output shaft of the gearing mechanism is connected to the lead wire wrapping spindle 10 through a ratchet mechanism 45. The spindle 10 rotates normally and reversely in the sleeve 22, and in case of the reverse rotation the spindle 10 is held by a ratchet mechanism 46 at a position where the open end of the lead wire holding slot 16 is aligned with the recess 28 of the sleeve 22 as best shown in Figure 3 In operation of the control means for the wire wrapping machine according to the inventlon, when the bar terminal 12 of the circuit element is vertically inserted into the terminal insertion hole 14 provided in the spindle 10 to close the motor switch SW3, the motor 40 is driven to ~llow the spindle 10 to rotate in the sleeve 22 for tightly wrapping the lead wire (see Fig.2). During this process, the current ~lows throu~h the diode Dl in the regular direction to charge the electrolytic oondenser EC3 until the charging is saturated. When the wrapping operation process is flnished and the switch SW3 is opened, the current supply from the first rectifying clrcuit 36 to the motor 40 is interrupted to shortcircuit the motor simult~neously as the motor switch SW3 is switched to directly conneot ... . . _ . .. .
6~ZO~
the motor inputs INl and IN2, the short current is passed through the motor Llo with application of an electromagnetlc brake to stop actuation of the motor instantly. By opening the motor switch SW3, the discharging current of the electrolytic condenser FC3 flows through the transistor and the resistor R3 to malce the voltage of the resistor R3 equal to the discharge voltage of the electrolytic condenser EC3. Further, the discharge voltage charges the electrolytic condenser ECLI via the variable resistor ~Rl and the resistor R5 and is then applied to the resistors R6, R7 and the diodes D3, D4-During this process, the voltage of the resistor R6 is equal to the charging vol~age of the electrolytic condenser EC4 and compared to the base voltage of the transistor TR3 and when the voltage of the resistor R6 becomes higher than the base voltage, the transistor TR3 operates as a switch to permit the collecter current of the collecter C3 to pass therethrough to energize the relay RYl. m e relay contact RYl 1 cooperative with the energized RYlis switched to break the connection of the input (IN2) of the motor 40 to the negatlve output of the first rectifying circuit and instead to connect the positlve output of the second rectifying circuit 38 with the input terminal (IN2). In other words, the inverse voltage of the converted polarity is supplied to the motor 40 to permit the motor to rotate reversely~ Since, however, the ratchet mechanism 46 is inserted into the spindle 10 connected to the motor 40 the spindle 10 is held at a predetermined position as shown in Fig. 3 to stop actuatlon of the motor. In this operation, the motor is constrained to stop rotation while being applied by the inverse voltage with damages of the motor by burnining or dema~netization, for example. In order to avoid these defects, the relay contact ~ c~operative with the energized relay RYl is closed to discharge the condensers EC3 and EC4 through the resistors R2 and RLI until the voltage thereof comes to below the release voltage of the relay~
RYl so that the relay RYl is sub~ected to the returning operation to switch ~
the relay colltact RYl 1 to the negative output of the ~irst rectifying circuit 36 for di~continuing the application of the inverse voltage while reopening the relay contact RYl 2 to obtain the constant open position. One oycle the wire ~rapping process in the control means is thus finishe .
:
_g_ 1C)6920~L
~ The conversion of the discharging time, i.e., an application time Or the inverse voltage is optionally provided by selectlng the capacitance value of the condenser ECL~ and the constant value of the discharging resistor R4.
When the motor switch ~3 is turned off to stop a further wrapping operation because of the failure of the wrapping operation during the process, since the sequence step of the control circuit is once cancelled for reset, the next wrapping operation can be repeated from the first step by the turning off of the switch. ~rther, by changing the resistance value of the variable resistor VRl the fine ad~ustment of the time in which the motor 4O after its interruption is permitted to rotate reversely by supplying the reverse current thereto may be attained.
As hereinbefore fully described, in accordance with a control means of the present invertion the dc motor acco~lmodated in the wire wrapping machine is applied by the inverse voltage for the short time to reverse the operation of the motor so that the lead wire wrapping spindle ls positioned at a predetenmined locus in relation to the outer fixed sleeve. Accordingly, the clutch mechanism which is indispensable to the conventional machine could be left out with reduction of the cost and decrease of the weight of the machine as well as elimination of the troubles to be caused~by the~clutch mechanism. Moreover, in the control means according to the invention,~the motor clrcuit is shortcircuitted in simultaneous with the interruptlon ..
o~ the current to the motor to instanteneously stop actuation of~the motor ~
and after the complete cessation of the motor, the inverse voltage 1s applied to the motor to avoid the demagnetization of the permanent magnet~fo~rming a stator of the dc motor. ~urther, use of the dc motor results in less nolse on the ~rapplng operation and does not require any compres:or.
While typicalem~od~mentsof the invention have been illustrated by way Or exa~ple ln~the~drawings and partlcularly described,;it wlll~be understood that mod1flcations may be made in the constructlon and that the - invention ls no we~ limlted to the embodiments shown.
-10~
.. . . . . ..
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A wire wrapping machine comprising a lead wire wrapping spindle, an outer sleeve for totatably supporting the spindle, a d.c. motor, a ratchet coupling said motor to the spindle so as to permit the spindle to rotate freely in the forward direction, and to prevent the spindle rotating beyond a predetermined positon in relation to the outer sleeve when the spindle is rotated in the reverse direction, a first rectifying circuit for supplying current of a given polarity to the motor during the wrapping operation to cause it to rotate in the forward direction, means for supplying current of the opposite polarity to the motor on completion of the wrapping operation to cause it to rotate in the reverse direction until the spindle is in said predetermined position, and means for disconnecting the supply of reverse polarity current from said motor a predetermined short period of time after the completion of said wrapping operation, said short period of time being sufficient to allow the spindle to reach said predetermined position.
2. A wire wrapping machine as claimed in claim 1, further comprising a second rectifying circuit for supplying current of opposite polarity to the d.c. motor, a switch for disconnecting said first rectifying circuit from the d.c.
motor on completion of the wire wrapping operation, and a condensor which is charged during forward operation of the motor, said condensor discharging on completion of the wire wrapping operation to activate a control relay, said control relay, when activated, closing a pair of contacts to connect the d.c. motor to the second rectifying circuit.
motor on completion of the wire wrapping operation, and a condensor which is charged during forward operation of the motor, said condensor discharging on completion of the wire wrapping operation to activate a control relay, said control relay, when activated, closing a pair of contacts to connect the d.c. motor to the second rectifying circuit.
3. A wire wrapping machine as claimed in claim 2, wherein the control relay, when activated, also closes a further pair of contacts to discharge the condensor additionally through a resitor.
4. A wire wrapping machine as claimed in claim 3, wherein said condensor, on completion of the wire wrapping operation, charges a further condensor which, when charged by a predetermined amount, activates said control relay a certain time after the completion of the wire wrapping operation.
5. A wire wrapping machine as claimed in claim 4, wherein said further condensor is also arranged to discharge through said further pair of contacts so that said control relay is de-activated after said short period of time when said condensors have discharged by a given amount.
6. A wire wrapping machine as claimed in claim 5, wherein said switch is a two-way switch which connects one terminal of the d.c. motor to one of the terminals of the first rectifying circuit during forward operation of the motor, and which short-circuits the motor on completion of the wire wrapping operation to brake the motor as rapdily as possible.
7. A wire wrapping machine as claimed in claim 6, wherein the pair of relay contacts connecting the d.c. motor to said second rectifying circuit are connected to the other terminal of the motor, said contacts being two-way contacts which during forward operation connect said other terminal of the motor to the other terminal of the first rectifying circuit, said contacts switching over on activation of the control relay after said motor has been braked by being short-circuited.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14538075A JPS5268972A (en) | 1975-12-06 | 1975-12-06 | Wire wrapping machine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069204A true CA1069204A (en) | 1980-01-01 |
Family
ID=15383891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA264,642A Expired CA1069204A (en) | 1975-12-06 | 1976-11-02 | Control means for the wire wrapping machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5268972A (en) |
| CA (1) | CA1069204A (en) |
| DE (1) | DE2652041C2 (en) |
| GB (1) | GB1572090A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6247813U (en) * | 1985-09-12 | 1987-03-24 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD94842A1 (en) * | 1971-07-07 | 1973-01-12 |
-
1975
- 1975-12-06 JP JP14538075A patent/JPS5268972A/en active Granted
-
1976
- 1976-11-02 CA CA264,642A patent/CA1069204A/en not_active Expired
- 1976-11-03 GB GB4562676A patent/GB1572090A/en not_active Expired
- 1976-11-15 DE DE19762652041 patent/DE2652041C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5754912B2 (en) | 1982-11-20 |
| JPS5268972A (en) | 1977-06-08 |
| DE2652041A1 (en) | 1977-06-08 |
| GB1572090A (en) | 1980-07-23 |
| DE2652041C2 (en) | 1986-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3935909A (en) | Electric hand tool | |
| JPH08340641A (en) | Battery power circuit | |
| CA1069204A (en) | Control means for the wire wrapping machine | |
| CN222169341U (en) | Pre-charging circuit and energy storage power supply | |
| US4203057A (en) | Control means for the wire wrapping machine | |
| JPH077807A (en) | Electric vehicle controller | |
| CA1062776A (en) | Filter capacitor charging circuit | |
| JPH09301633A (en) | Automatic winding and unwinding reel device | |
| JPH0754921Y2 (en) | Discharger | |
| CN213403627U (en) | Circuit board and motor using same | |
| CN2298524Y (en) | Multifunction silicon controlled detector | |
| CN221137684U (en) | Vehicle charging device | |
| CN218631878U (en) | Direct-current shunt release with self-protection circuit breaker | |
| JPH08163785A (en) | Generating mechanism | |
| JPS62104436A (en) | charger | |
| CN2251156Y (en) | Electronic timer | |
| JPS58175980A (en) | Motor sudden stop device | |
| SU1718356A1 (en) | Reversible automatic dc motor drive | |
| JPS596503Y2 (en) | Lid opening/closing device for electrical equipment | |
| JP3152081B2 (en) | Acoustic equipment with electric opening / closing lid | |
| CN207917626U (en) | A kind of communications electronics component additional storage conveying device | |
| CN2134002Y (en) | Telephone expansion device with message leaving, answering and recording functions | |
| JPH08154390A (en) | Motor stop circuit | |
| SU1509825A1 (en) | Working hour counter | |
| US1362898A (en) | Electric controlling means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |