Abstract: A load sensing transmission device in which when a rotation is transmitted to a sun gear, and planetary gears are rotated, if the rotation of an internally-toothed ring gear disposed at an outer circumference of the planetary gears is restricted in at least one direction, a decelerated rotation is output from a planetary carrier by revolution of the planetary gears. When the internally-toothed ring gear is rotated without being restricted, and simultaneously rotated together with the revolution of the planetary gears the rotation which is not decelerated is output from the planetary carrier. Existence and non-existence of the restriction of the rotation of the internally-toothed ring gear are switched by sensing a load by the load sensing mechanism and performing the engagement and disengagement by an engagement pawl. The rotation of the planetary carrier is output through a plate with slider, load springs, and a plate with cam.

Abstract: A load sensing transmission device in which when a rotation is transmitted to a sun gear, and planetary gears are rotated, if the rotation of an internally-toothed ring gear disposed at an outer circumference of the planetary gears is restricted in at least one direction, a decelerated rotation is output from a planetary carrier by revolution of the planetary gears. When the internally-toothed ring gear is rotated without being restricted, and simultaneously rotated together with the revolution of the planetary gears the rotation which is not decelerated is output from the planetary carrier. Existence and non-existence of the restriction of the rotation of the internally-toothed ring gear are switched by sensing a load by the load sensing mechanism and performing the engagement and disengagement by an engagement pawl. The rotation of the planetary carrier is output through a plate with slider, load springs, and a plate with cam.

Abstract: A hoisting and pulling device including a main body frame 2 for forming a load sheave containing space by constituting an inner face by a guide face 25a for guiding a load chain 5 wound around a load sheave, a bearing plate 21b fixedly provided to an inner side of the main body frame 2 for bearing the load sheave and a speed reducing gear on a side of speed reducing means, and a bearing plate 21a for bearing the load sheave 11 on a side of driving means for partitioning the load sheave containing space, the driving means, and the speed reducing means by the bearing plates. According to a hoist of a background art, portability and operability and durability are not compatible with each other and the hoist is not provided with a function of preventing dust of a mechanical brake. Further, a problem is posed also in the operability of the hand chain.

Abstract: An overload preventing apparatus of a hoist characterized in including a drive shaft 2 for driving a load sheave 1, a pressure receiving member 4 outwardly fitted to the drive shaft 2, a drive member 10 for transmitting a drive force from operating means 14 to the drive shaft 2 by way of the pressure receiving member 4, a rotation drive member 12 including means of transmitting the drive force from the operating means 14 to the drive member 10 and releasing an engagement with the drive portion 10 when the operating means 14 is applied with a torque equal to or larger than a predetermined torque value and an elastic member 13 mounted along an axial direction of the drive member between a back face of the rotation drive member 12 and an inner side end face of the operating means 14 to pose a problem that a belleville spring is obliged to be used as urging means, and therefore, a stroke in the axial direction of the urging means is small, also a height of an engaging claw becomes small in accordance with the str

Abstract: A hoisting and pulling device including a main body frame 2 for forming a load sheave containing space by constituting an inner face by a guide face 25a for guiding a load chain 5 wound around a load sheave, a bearing plate 21b fixedly provided to an inner side of the main body frame 2 for bearing the load sheave and a speed reducing gear on a side of speed reducing means, and a bearing plate 21a for bearing the load sheave 11 on a side of driving means for partitioning the load sheave containing space, the driving means, and the speed reducing means by the bearing plates. According to a hoist of a background art, portability and operability and durability are not compatible with each other and the hoist is not provided with a function of preventing dust of a mechanical brake. Further, a problem is posed also in the operability of the hand chain.

Abstract: A hoisting and pulling device has a frame body (13) made by integrally forming a speed reducer side frame (13b) on an outer peripheral edge surface of the frame body, a drive side frame (13a) on the outer peripheral edge surface of the frame body, and a frame connection section (16) on the outer periphery of a load sheave receiving section. The speed reducer side frame (13b) rotatably supports a speed reducer gear (3) and has a speed reducer side cover installation section (15b). The drive side frame (13a) has a drive side cover installation section (15a). The frame connection section (16) has guide grooves (22a, 22b) for guiding a chain (11) run around the load shave. Both frames (13a, 13b) have hook installation holes (24) for rotatably supporting a hook for suspending a body frame on the load side. The structure above reduces the number of parts and assembling man-hour and makes the structure simpler, reducing the size and costs.

Abstract: An overload preventing apparatus of a hoist characterized in including a drive shaft 2 for driving a load sheave 1, a pressure receiving member 4 outwardly fitted to the drive shaft 2, a drive member 10 for transmitting a drive force from operating means 14 to the drive shaft 2 by way of the pressure receiving member 4, a rotation drive member 12 including means of transmitting the drive force from the operating means 14 to the drive member 10 and releasing an engagement with the drive portion 10 when the operating means 14 is applied with a torque equal to or larger than a predetermined torque value and an elastic member 13 mounted along an axial direction of the drive member between a back face of the rotation drive member 12 and an inner side end face of the operating means 14 to pose a problem that a belleville spring is obliged to be used as urging means, and therefore, a stroke in the axial direction of the urging means is small, also a height of an engaging claw becomes small in accordance with the str

Abstract: A winching and drawing machine comprises a drive shaft for driving a load sheave, a pressure receiving member fitted onto the drive shaft, brake plates installed in contact with the pressure receiving member and fitted onto the drive shaft, a pawl wheel interposed between the brake plates, a drive member screwed on the drive shaft so as to be pressed to and separated from the brake plates, an idler spring installed between the drive shaft and the drive member, and a lever. A stopper engaging with the drive shaft is provided at an end face of the drive member and an idler grip is fixed on an outer face of the stopper 7. Lever latching structure at a drive-shaft end of the winching and drawing machine has a function of adjusting a chain length.

Abstract: A hoisting and pulling device has a frame body (13) made by integrally forming a speed reducer side frame (13b) on an outer peripheral edge surface of the frame body, a drive side frame (13a) on the outer peripheral edge surface of the frame body, and a frame connection section (16) on the outer periphery of a load sheave receiving section. The speed reducer side frame (13b) rotatably supports a speed reducer gear (3) and has a speed reducer side cover installation section (15b). The drive side frame (13a) has a drive side cover installation section (15a). The frame connection section (16) has guide grooves (22a, 22b) for guiding a chain (11) run around the load shave. Both frames (13a, 13b) have hook installation holes (24) for rotatably supporting a hook for suspending a body frame on the load side. The structure above reduces the number of parts and assembling man-hour and makes the structure simpler, reducing the size and costs.

Abstract: A winching and drawing machine comprising a drive shaft 1 for driving a load sheave 10, a pressure receiving member 2 fitted onto the drive shaft 1, brake plates 3 installed in contact with the pressure receiving member 2 and fitted onto the drive shaft 1, a pawl wheel 4 interposed between the brake plates 3, a drive member 5 screwed on the drive shaft 1 so as to be pressed to and separated from the brake plates 3, an idler spring 6 installed between the drive shaft 1 and the drive member 5, and a lever 24, and characterized in that a stopper 7 engaging with the drive shaft 1 is provided at an end face of the drive member 5 and an idler grip 8 is fixed on an outer face of the stopper 7. Lever latching means at a drive-shaft end of the winching and drawing machine has the function of adjusting the chain length, and the winching and drawing machine includes a small number of parts, and is small-sized, lightweight and inexpensive.