Abstract: A semiconductor device includes: an n-type semiconductor layer; a p-type drift region formed in a surface layer of the n-type semiconductor layer; an n-type body region formed in the surface layer of the n-type semiconductor layer so as to be spaced apart from or adjacent to the p-type drift region; a p-type drain region formed in a surface layer of the p-type drift region; a p-type source region formed in a surface layer of the n-type body region; a gate insulating film formed over a surface of the n-type semiconductor layer so as to straddle the p-type drift region and the n-type body region; a gate electrode formed over the gate insulating film; and an n-type region formed in the surface layer of the p-type drift region and arranged between a side edge of the p-type drift region near the n-type body region and the p-type drain region.

Abstract: A semiconductor device includes an n-type semiconductor layer, a p-type drift region formed in a surface layer portion of the semiconductor layer, an n-type body region formed in the surface layer portion of the semiconductor layer, a p-type drain region formed in a surface layer portion of the drift region, a p-type source region formed in a surface layer portion of the body region, a gate insulating film formed on a surface of the semiconductor layer, and a polysilicon gate formed on the gate insulating film, wherein a region extending from the source region to a side edge of the drift region is a channel region, and wherein the polysilicon gate includes a p-type first portion facing at least a portion of the channel region, and an n-type second portion facing at least a portion of the drift region.

Abstract: A sheave support apparatus for an elevator includes a car frame and a sheave support member. The car frame supports a car, and has a beam extending in a horizontal direction. The sheave support member rotatably supports a pair of sheaves around which cables pass, and is attached to the beam to extend in the horizontal direction in a state of crossing the beam of the car frame. The sheave support member includes a first support beam and a second support beam. The first and the second support beams are fixed to the beam of the car frame in a state of holding the beam therebetween from above and below. The sheaves are supported between respective end portions of the first support beam and respective end portions of the second support beam.

Abstract: An elevator in which a driving apparatus, a traction sheave, and a counterweight-side rope hitching portion are arranged above one rail of the right and left cage-side guide rails, while a cage-side rope hitching portion and a speed governor are arranged above the other rail of the right and left cage-side guide rails. Since a control panel is arranged along a rear inner wall surface of the machine room, a large operation space can be secured in a center part of the floor of the machine room. Further, since a machine beam can be extended at full length in the back and forth direction in the machine room, no additional building-side receiving beam is needed.

Abstract: The present invention provides a machineroomless elevator system 100 including an elevator hoist 25 that can be rationally disposed in a limited space in a top part of an elevator shaft 2. In the machineroomless elevator system 100, the elevator hoist 25 is disposed such that a first end thereof provided with a main sheave 26 is above a counterweight 22, and a second end 25a thereof opposite the first end is above the rear end 20c of a cage 20 as viewed from above the elevator shaft 2. Therefore, the degree of freedom of disposing the elevator hoist 25 can be increased, and devices mounted on the top wall of the cage 20 can be easily arranged so that the devices may not interfere with the elevator hoist 25.

Abstract: A sheave support apparatus for an elevator includes a car frame and a sheave support member. The car frame supports a car, and has a beam extending in a horizontal direction. The sheave support member rotatably supports a pair of sheaves around which cables pass, and is attached to the beam to extend in the horizontal direction in a state of crossing the beam of the car frame. The sheave support member includes a first support beam and a second support beam. The first and the second support beams are fixed to the beam of the car frame in a state of holding the beam therebetween from above and below. The sheaves are supported between respective end portions of the first support beam and respective end portions of the second support beam.

Abstract: In an elevator, a drive device, a traction sheave, and a weight-side stop portion are arranged above one of a pair of left and right cage-side guide rails, and a cage-side stop portion and speed governor are arranged above the other cage-side guide rail. A wide workspace is realized in the middle of the floor of the machinery chamber, since the control panel is arranged along the middle of the inside wall surface of the front face of the machinery chamber. Furthermore, provision of an additional supporting beam mounted in the building is unnecessary, since the machine beam can extend fully in the forwards/rearwards direction in the interior of the machinery chamber.

Abstract: Rubber vibration isolators are held between a base frame supporting a driving device and an upper deflecting sheave, and a support connected to car guide rails and a counterweight guide rail. The rubber vibration isolators are held between a horizontal member and vertical members of a support frame supporting lower deflecting sheaves. Transmission of vibrations generated by the driving device, the upper deflecting sheave, and the lower deflecting sheaves to the side walls of an elevator shaft can be intercepted.

Abstract: In an elevator according to the present invention, a driving apparatus 42, a traction sheave 41, and a counterweight-side rope hitching portion 46 are arranged above one rail 21L of the right and left cage-side guide rails, while a cage-side rope hitching portion 44 and a speed governor 47 are arranged above the other rail 21R of the right and left cage-side guide rails. Since a control panel 48 is arranged along a rear inner wall surface 34 of the machine room, a large operation space can be secured in a center part of the floor 31 of the machine room 30. Further, since a machine beam 53 can be extended at full length in the back and forth direction in the machine room 30, no additional building-side receiving beam is needed.

Abstract: Rubber vibration isolators are held between a base frame supporting a driving device and an upper deflecting sheave, and a support connected to car guide rails and a counterweight guide rail. The rubber vibration isolators are held between a horizontal member and vertical members of a support frame supporting lower deflecting sheaves. Transmission of vibrations generated by the driving device, the upper deflecting sheave, and the lower deflecting sheaves to the side walls of an elevator shaft can be intercepted.

Abstract: A drive device (42), a traction sheave (41) and a weight-side stop portion (46) are arranged above one (21L) of a pair of left and right cage-side guide rails and a cage-side stop portion (44) and speed governor (47) are arranged above the other (21R) cage-side guide rail. Also a wide workspace can be guaranteed in the middle of the floor (31) of the machinery chamber (30), since the control panel (48) is arranged along the middle of the inside wall surface (37) of the front face of the machinery chamber (30). Furthermore, provision of an additional supporting beam mounted in the building is unnecessary, since the machine beam (53) can extend fully in the forwards/rearwards direction in the interior of the machinery chamber (30).

Abstract: A semi-automatic hydraulic excavator capable of automatically controlling arm and bucket angles when bringing the bucket back to the original excavation posture after completion of dumping excavated soil. For this purpose, arm and bucket angle detectors are provided therein and the automatic control is performed by negatively feeding back values detected by these detectors to minimize deviations between these values and preset values produced from arm and bucket angle setters corresponding to the arm and bucket angles in the original excavation posture. The automatic control mode is selected by a signal from an automatic control command signal producing circuit. With this system, the bucket is swiftly brought back to the original excavation posture from the dumping posture without requiring much operator's skill and efforts.