What is claimed is:
1. An automatic assembling method using a plurality of integrally formed pallets and a pallet conveyer for conveying said pallets cyclically and intermittently to stop said pallets at predetermined stations wherein parts are sequentially fed to and assembled on each of said pallets, each of said pallets has a primary assembling portion and a secondary assembling portion, said method comprising the steps of:
a first step of sequentially feeding parts of a secondary assembly to said secondary assembling portion, to be assembled into said secondary assembly; and
a second step of sequentially feeding said secondary assembly and other parts to said primary assembling portion, to be assembled into a primary assembly.
2. An automatic assembling method as recited in claim 1, wherein, during said second step, said secondary assembly is transferred from said secondary assembling portion to said primary assembling portion within each of said pallets at one of said predetermined stations.
3. An automatic assembling method as recited in claim 2, wherein said assembling portions are work holders which are mounted on one side of each of said pallets at corresponding positions of each of said pallets.
4. An automatic assembling apparatus for assembling a primary assembly including a secondary assembly as one part thereof, said apparatus comprising:
at least two rotary shafts extending in parallel with each other in a horizontal plane;
an endless belt disposed around said rotary shafts;
a plurality of integral formed pallets having the same construction;
a holding member for removably holding said pallets on said endless belt in alignment with a longitudinal direction of said endless belt;
a driving device for driving said endless belt through said rotary shafts to convey said pallets cyclically and intermittently at regular intervals by a constant pitch;
primary and secondary work holders mounted on one side of each of said pallets at corresponding positions of each of said pallet;
feeding and assembling devices for sequentially feeding parts of said secondary assembly to said secondary work holder of each of said pallets and assembling said parts into said secondary assembly in said secondary work holder; and
feeding and assembling devices for sequentially feeding said secondary assembly and other parts of said primary assembly to said primary work holder of each of said pallets and assembling said secondary assembly and said other parts into said primary assembly in said primary work holder.
5. An automatic assembling apparatus as recited in claim 4, wherein said feeding and assembling devices are disposed in said predetermined stations which are arranged along an upper path of said endless belt in a predetermined sequence of assembling.
6. An automatic assembling apparatus as recited in claim 5, wherein said holding members include a plurality of projection members disposed on a pallet supporting side of said endless belt to be loosely engaged with said pallets, guide fences disposed along said endless belt on lateral sides of said pallets, and anti-drop guide rails disposed below a lower path of said endless belt and around both corners between said upper and lower paths of said endless belt.
7. An automatic assembling apparatus as recited in claim 6, wherein said at least two rotary shafts are two shafts disposed in said corners of said endless belt, and one of said rotary shafts is coupled to said driving device.
8. An automatic assembling apparatus as recited in claim 7, wherein said feeding and assembling devices are driven by said driving device in synchronism with each other.
9. An automatic assembling apparatus as recited in claim 5, further comprising a positioning device in association with each of said feeding and assembling devices, for positioning one of said pallets relative to each of said feeding and assembling devices, wherein said positioning device comprises a pair of positioning plates disposed on lateral sides of said pallets and means for moving said positioning plates in a transverse direction of said endless belt such that a first one of said positioning plates contact one lateral side of said one pallet at a predetermined position, while a second one of said positioning plates pushes said one pallet against said first positioning plate, thereby to position said one pallet in the transverse direction, and wherein said second positioning plate has a pair of symmetrically sloped portions which are spaced from each other in the longitudinal direction of said endless belt, said second positioning plate pushing said one pallet at said slopes, thereby to position said one pallet in the longitudinal direction.
10. An automatic assembling apparatus as recited in claim 9, wherein said sloped portions are brought into tangential contact with a pair of pins which are mounted on each of said pallets and are aligned in the longitudinal direction.
11. An automatic assembling apparatus as claimed in claim 4, wherein said primary assembly is a cassette shell of a photographic film cassette which comprises a pair of shell halves and a spool assembly mounted between said shell halves, and said secondary assembly is said spool assembly, said spool assembly comprising a spool core and a pair of flanges secured to said spool core.
12. An automatic assembling method for assembling a cassette shell of a photographic film cassette having a pair of shell halves and a spool assembly, by using a plurality of integrally formed pallets and a pallet conveyer for conveying said pallets cyclically and intermittently to stop sad pallets at predetermined stations, said method comprising the steps of:
mounting a spool assembling portion and a shell assembling portion on each of said pallets at corresponding positions of each of said pallets;
feeding parts of said spool assembly to said spool assembling portion of each of said pallets in a predetermined sequence of assembling, one part for each predetermined stop position of said pallets, to assemble said parts into said spool assembly at said spool assembling portion;
feeding one shell half, said spool assembly and other shell half in this order to said shell assembling portion of each of said pallets, to assemble these parts into said cassette shell.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A manufacturing method of a stator structure adapted to be assembled with a rotor, comprising steps of:
providing a first cover and a second cover to define an accommodation space between the first and second covers;
disposing a stator assembly in the accommodation space;
applying a filler between the first cover and the second cover after the first and second covers are assembled together to cover the stator assembly;
disposing the first cover, the second cover and the stator assembly on a base; and
coupling the rotor with the first cover, the second cover and the stator assembly, wherein the rotor is disposed outside the first cover.
2. The manufacturing method according to claim 1, wherein the stator assembly having a circuit board.
3. The manufacturing method according to claim 1, wherein the first cover and the second cover are combined by engaging, lodging, locking or adhering.
4. The manufacturing method according to claim 1, wherein the first cover or the second cover has a hole for applying the filler into a space between the first cover and the second cover.
5. The manufacturing method according to claim 1, further comprising a step of:
connecting the first cover with a base of a fan frame to make the stator assembly located on the base.
6. The manufacturing method according to claim 1, wherein the first cover or the second cover is made of plastics, acryl or metal.
7. The manufacturing method according to claim 1, wherein the filler is made of epoxy resin, silica gel or polyurethane.
8. The manufacturing method according to claim 7, wherein the filler is solidified by quick cooling or baking at high temperature after the filler is applied.