1. A chair ganger apparatus comprising
a gang flange including a first side wall, a second side wall, and a top wall arranged to interconnect the first and second side walls and support the second side wall in spaced-apart relation to the first side wall to define a cross bar retainer channel therebetween and
a flange mount adapted to be coupled to two chairs arranged to lie adjacent to one another in side-by-side relation, wherein the flange mount includes a fixed plate coupled to the first side wall of the gang flange and arranged to extend into the cross bar retainer channel and a removable plate arranged to extend into the cross bar retainer channel in a space provided between the second side wall of the gang flange and the fixed plate, the flange mount also includes a first cross bar formed to include the fixed plate and adapted to be coupled to two legs of a first chair and a second cross bar formed to include the removable plate and adapted to be coupled to two legs of a second chair, each of the first and second cross bars is formed to include a gang-flange receiver channel, and the top wall of the gang flange is positioned to lie in the gang-flange receiver channel formed in each of the first and second cross bars.
2. The chair ganger apparatus of claim 1, wherein the first cross bar includes a top edge interrupted by the gang-flange receiver channel formed in the first cross bar, the top wall of the gang flange includes an exterior surface located outside of the cross bar retainer channel, and the top edge of the first cross bar and the exterior surface of the top wall of the gang flange are arranged to lie in coplanar relation to one another.
3. The chair ganger apparatus of claim 2, wherein the second cross bar includes a top edge interrupted by the gang-flange receiver channel formed in the second cross bar and the top edge of the second cross bar is arranged to lie in coplanar relation to the top edge of the first cross bar and the exterior surface of the top wall of the gang flange.
4. The chair ganger apparatus of claim 1, further comprising a first chair including a front leg and a rear leg, and wherein the first cross bar further includes a front leg mount coupled at one end to the fixed plate and at an opposite end to the front leg of the first chair and a rear leg mount coupled at one end to the fixed plate and at an opposite end to the rear leg of the first chair and wherein the fixed plate is located between the front and rear leg mounts.
5. The chair ganger apparatus of claim 4, wherein the front leg mount includes a top edge and a first end edge, the rear leg mount includes a top edge and a second end edge, the fixed plate includes a top edge, and the first end edge of the front leg mount, the second end edge of the rear leg mount, and the top edge of the fixed plate cooperate to define a boundary of the gang-flange receiver channel.
6. The chair ganger apparatus of claim 5, wherein the top wall of the gang flange includes an interior surface located inside the cross bar retainer channel and arranged to engage the top edge of the fixed plate.
7. The chair ganger apparatus of claim 5, wherein the top wall of the gang flange includes an exterior surface located outside of the cross bar retainer channel and arranged to lie in at least one of coplanar relation to and below the top edges of the front and rear leg mounts.
8. The chair ganger apparatus of claim 4, further comprising a second chair including a front leg and a rear leg and wherein the second cross bar further includes a front leg mount coupled at one end to the removable plate and at an opposite end to the front leg of the second chair and a rear leg mount coupled at one end to the removable plate and at an opposite end to the rear leg of the second chair and wherein the removable plate is located between the front and rear leg mounts of the second cross bar.
9. The chair ganger apparatus of claim 8, wherein the front leg mount of the second cross bar includes a top edge and a first end edge, the rear leg mount of the second cross bar includes a top edge and a second end edge, and the removable plate includes a top edge, and the first end edge of the second cross bar, the second end edge of the second cross bar, and the top edge of the removable plate cooperate to define a boundary of the gang-flange receiver channel formed in the second cross bar.
10. The chair ganger apparatus of claim 9, wherein the top wall of the gang flange includes an exterior surface located outside of the cross bar retainer channel and arranged to lie in at least one of coplanar relation to and below the top edges of the front and rear leg mounts of the second cross bar.
11. The chair ganger apparatus of claim 1, further comprising a chair including a front leg and a rear leg and wherein the second cross bar further includes a front leg mount coupled at one end to the removable plate and at an opposite end to the front leg of the chair and a rear leg mount coupled at one end to the removable plate and at an opposite end to the rear leg of the chair and wherein the removable plate is located between the front and rear leg mounts of the second cross bar.
12. The chair ganger apparatus of claim 11, wherein the front leg mount includes a top edge and a first end edge, the rear leg mount includes a top edge and a second end edge, the fixed plate includes a top edge, and the first end edge of the front leg mount, the second end edge of the rear leg mount, and the top edge of the fixed plate cooperate to define a boundary of the gang-flange receiver channel.
13. The chair ganger apparatus of claim 11, wherein the top wall of the gang flange includes an interior surface located inside the cross bar retainer channel and arranged to engage the top edge of the fixed plate.
14. A chair ganger apparatus comprising
a first chair including a first cross bar including a top edge interrupted by a gang flange receiver channel formed in the first cross bar,
a second chair including a second cross bar arranged to abut the first cross bar and a gang flange having a U-shaped cross section and including a first side wall abutting the first cross bar, a second side wall abutting the second cross bar to retain the first and second cross bars in a space formed between the first and second side walls, and a top wall arranged to interconnect the first and second side walls and extend into the gang flange receiver channel formed in the first cross bar.
15. The chair ganger apparatus of claim 14, wherein the first chair further includes a front leg and a rear leg and the first cross bar is coupled to each of the front and rear legs of the first chair and the second chair further includes a front leg and a rear leg and the second cross bar is coupled to each of the front and rear legs of the second chair.
16. The chair ganger apparatus of claim 14, wherein the second side wall includes a convex curved lower edge arranged to lie in spaced-apart relation from the top wall.
17. The chair ganger apparatus of claim 14, wherein each of the side walls comprises a flat plate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A limit switch comprising:
an inner switch having a plurality of switch element units; and
an inner case containing said inner switch, said inner case having covers and a switch case including a partition wall and independently provided switch areas which sandwich said partition wall in between, said switch element units being distributed individually into said switch areas, said covers each sealing a corresponding one of said switch areas.
2. The limit switch of claim 1 comprising at least four independent switch element units.
3. The limit switch of claim 2 wherein said switch areas include screening members for separating said switch element units when said switch elements units are contained in said switch areas.
4. The limit switch of claim 3 wherein said switch element units each include a fixed terminal having a first fixed contact point and a second fixed contact point, a mobile member having a first mobile contact point and a second mobile contact point and a switch plunger, said first fixed contact point and said first mobile contact point forming a first contact unit, said second fixed contact point and said second mobile contact point forming a second contact unit, said switch plunger serving to open and close said first contact unit and said second contact unit.
5. The limit switch of claim 4 wherein said switch areas include:
a switch plunger containing part for containing said switch plunger;
fixed terminal attachment parts for installing said fixed terminals, said fixed terminal attachment parts sandwiching said switch plunger containing part from both sides; and
lead line areas for placing lead lines disposed along said fixed terminal installation parts and connected to said fixed terminals.
6. The limit switch of claim 5 wherein said fixed terminal attachment parts include a plurality of fixed terminal installation parts along a direction in which said switch plunger moves, said fixed terminal installation parts serving to detachably install said fixed terminals, wherein said switch plunger comprises a switch plunger main body having a plurality of said mobile members detachably attached and an elastic holder for holding and biasing said mobile members, wherein said fixed terminals are detachably set to said fixed terminal installation parts, said switch plunger being biased by a returning spring when contained movably inside said switch plunger containing part.
7. The limit switch of claim 6 further comprising plunger means for operating said inner switch, said plunger means including a link plunger for operating the switch plungers of a plurality of inner switches.
8. The limit switch of claim 7 further comprising:
a case main body having a hole part for said link plunger to pass through; and
a seal cap holder at said hole part for holding a seal cap;
said link plunger having a plunger engaging part, said seal cap having a cap main body made of an elastic material, first engaging part at one end part of said cap main body, and a second engaging part at another end part of said cap main body and formed as an O-ring, said link plunger being attached to said seal cap by engaging said first engaging part with said plunger engaging part and said second engaging part with said seal cap holder.
9. The limit switch of claim 5 wherein said inner case further includes a fastening case, said cable being sandwiched between said switch case and said fastening case as said lead lines of said cable are connected to said inner switch and said switch case is fastened to said fastening case.
10. The limit switch of claim 5 wherein said inner case further includes a fastening case, said lead lines of said cable being connected to said inner switch, said cable having a sealing member with a sealing ring outside, said fastening case having a cable-passing hole through which said cable passes, said sealing member being inserted into said cable-passing hole, said fastening case having a mutually engaging pair of seal holders, said cable being sealed by pressing said sealing ring with said seal holders.
11. The limit switch of claim 5 wherein said lead lines are connected to said fixed terminal by compressive connection.
12. The limit switch of claim 1 wherein said switch cover has compressing means on an inner surface for compressing compression connection parts of said lead lines.
13. The limit switch of claim 1 wherein said switch case includes an elastic grounding line holder with an elastic force, said grounding line holder holding a grounding line and causing said grounding line to contact said switch main body by said elastic force.
14. The limit switch of claim 5 wherein said lead lines are arranged symmetrically within said cable.
15. A limit switch comprising:
a switch unit;
a head unit which operates said switch unit;
a protrusion on either one of said switch unit and said head unit; and
an indentation on the other of said switch unit and said head unit, said head unit being connected to said switch unit by engaging said protrusion with said indentation.
16. The limit switch of claim 15 wherein said switch unit comprises a switch main body having shoulders, said protrusion being formed by steps at said shoulders, said head unit having a head case with two legs protruding to form said indentation therebetween.
17. The limit switch of claim 16 wherein said protrusion has an attachment hole part, a screw member being inserted in said attachment hole part serving to compress said legs to said protrusion to thereby fasten said switch main body and said head case together.
18. The limit switch of claim 17 wherein said switch unit contains an inner switch, said limit switch further comprising a head unit displacing means for moving said head unit in a direction in which a switch plunger in said inner switch moves.
19. The limit switch of claim 18 wherein said head unit displacing means includes a spacer inserted between said head unit and said switch unit.
20. The limit switch of claim 15 wherein said head unit includes a head case and a rotary shaft rotatably supported by said head, said head case displaying two or more set zones, said rotary shaft having a zone indicator for selectively indicating one of said set zones.
21. The limit switch of claim 20 further comprising:
a lever for rotating said rotary shaft;
a lever angle adjuster supporting said lever; and
a roulette part formed on a portion of a peripheral part of said lever angle adjuster, said rotary shaft and said lever angle adjuster engaging together through said roulette part.
22. The limit switch of claim 21 wherein said lever is a form-lock lever having a pair of holes which are elongated in the direction of said lever and gear parts on sides of said elongated holes, said lever angle adjuster having a pair of lever holders with lever engaging parts, said lever holders being inserted to said elongated holes so as to engage said gear parts with said lever engaging parts so as to connect said form-lock lever with said lever angle adjuster.
23. The limit switch of claim 15 wherein said head unit includes an actuator for operating said switch head, said actuator comprising:
a roller for a mobile member to contact;
a lever supporting said roller, said lever tilting when said mobile member contacts said roller; and
a weight on said lever opposite to said roller.