JPS64117Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an electric lifting device for a hairdressing chair.

[Conventional technology and its issues]

Conventional hairdressing chairs are raised and lowered using hydraulic pressure, but hydraulic chairs require a pump to be driven by pedal operation, making them cumbersome to operate. There is also a screw-jer type electric lift chair, but there is a problem that the chair rotates when the chair is raised and lowered without any load.

The purpose of this invention is to solve the problems of conventional electric lift chairs as described above.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention fits an elevating cylinder that can be raised and lowered and rotated into a support cylinder, and a seat is attached to the upper end of this elevating cylinder, and a female screw at the lower end is connected to a female screw at the lower end of the cylinder so that it can be rotated in the forward and backward directions by an electric motor. In an electric lifting device for a hairdressing chair, in which a threaded rod is screwed in, the threaded rod is fitted into an elevator cylinder, and the elevator cylinder is raised and lowered by rotation of the threaded rod, a sleeve is fixed to the inner periphery near the upper part of the support cylinder. The elevating tube is passed through the sleeve, a plurality of circumferential grooves are formed on the inner periphery of the sleeve at intervals vertically, and each circumferential groove is provided with a resistance imparting member made of rubber or the like that provides resistance to the elevating tube. The resistance is set within a range that is greater than the torque applied from the electric motor to the elevator tube and smaller than the torque applied from the seat.

[Operation] When the electric motor is driven and the threaded rod is rotated to raise and lower the seat, the elevating tube is raised and lowered without rotating while being provided with resistance by the resistance providing member. Furthermore, when the seat is rotated with the electric motor stopped, the elevating cylinder overcomes the resistance of the resistance imparting member and rotates.

〔Example〕

The details of this invention will be explained below based on an embodiment shown in the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a vertical cylindrical support cylinder fixed on a base 2, and a sleeve 3 is fixed inside the cylinder 1 near the top.

Reference numeral 4 denotes a cylindrical elevating tube, which passes through the sleeve 3 so as to be rotatable and movable up and down. A seat is attached to the upper end of this elevating cylinder 4. Reference numeral 5 denotes an annular resistance imparting member made of rubber or the like, which is fitted into a plurality of circumferential grooves formed on the inner periphery of the sleeve 3 at required intervals vertically.

Reference numeral 6 denotes a sliding ring fixed to the outer periphery of the lower end of the elevating cylinder 4, and slidably contacts the inner surface of the cylinder body 1. Further, a female screw 7 is fixed between the lower ends of this elevating cylinder 4.

Reference numeral 8 denotes a threaded rod, which is screwed into the female thread 7 and is housed within the elevating cylinder 4. The lower end of this threaded rod 8 passes through a thrust bearing 9 attached to the base 2 and enters the inner periphery of the machine box 10 at the bottom of the base 2.

Reference numeral 11 denotes an electric motor fixed to a part of the base 2, and a pinion gear 13 fixed to a shaft 12 at the lower end of the motor is engaged with a gear 14 at the lower end of the threaded rod 8.

Reference numerals 15 and 16 indicate limit switches fixed on the upper and lower sides of the outside of the support cylinder 1, and the operating pieces thereof penetrate through the upper and lower openings of the cylinder 1 and protrude into the cylinder 1, and contact the sliding ring 6 to prevent the elevating cylinder from moving. Detect the upper and lower limits of 4.

FIG. 2 is a circuit diagram, and 17 is a power supply. One side of this power source 17 is directly connected to the electric motor 11, the other is branched in the middle, and one of them is connected to the capacitor 20 via the upward side changeover switch 18 and the upper limit switch 15, and the other is connected to the downward side changeover switch 19. is connected to the capacitor 20 via the lower limit switch 16, and the capacitor 20 is connected to the
The output circuit of the book is set to the electric motor 11. However, this circuit is just an example. Further, each of the above-mentioned changeover switches 18 and 19 is suitably a foot-operated type.
Note that the inside of the elevator cylinder 4 and the inside of the machine box 10 are filled with lubricating oil.

This invention has the above configuration, and the resistance imparting member 5
The resistance given to the elevator cylinder 4 by the entire motor 11 is
The rotational torque is set to be larger than the rotational torque applied to the elevator tube 4 by the rotation of the seat, but smaller than the rotational torque applied by the rotation of the seat (this rotation is performed manually).

Now, in the state shown in Fig. 1, when the lift selector switch 18 is closed, the electric motor 11 rotates forward and shifts to gear 1.
3 and 14, the threaded rod 8 is rotated in the normal direction.

At this time, since the elevating tube 4 cannot rotate due to the resistance of the member 5, the elevating tube 4 rises by sliding between the female screw 7 and the threaded rod 8, but when the elevating tube 4 reaches its upper limit, the sliding ring 6 pushes the operating piece of the limit switch 15 to stop the electric motor 11.

Next, when the lowering changeover switch 19 is closed, the electric motor 11 reverses and the elevating cylinder 4 is lowered, and when the lower limit is reached and the sliding ring 6 acts on the limit switch 16, the motor 11 is stopped.

In addition, when the changeover switches 18 and 19 are turned off in either case of the above-mentioned ascending or descending, the elevating cylinder 4 stops on the spot.

When the seat is rotated while the electric motor 11 is stopped, the elevating tube 4 integrated therewith rotates overcoming the resistance of the member 5 and moves up and down according to the threaded rod 8.

[Effect of idea]

As described above, this invention uses a resistance imparting member to impart a required amount of resistance to the elevator tube, so the electric motor can be driven when no person is on the seat. However, the seat does not rotate. Furthermore, when the seat is rotated manually, the above-mentioned resistance does not impede the rotation.

In addition, the circumferential groove in which the resistance imparting member is fitted is spaced apart vertically, so when the elevator tube is tilted, the upper resistance imparting member is at a position opposite to the position where it is compressed by the elevator tube. The lower resistance imparting member is compressed. Therefore, resistance can be applied at two locations. Therefore, compared to a structure provided at one location, it is possible to reliably provide the necessary resistance even when the elevator cylinder is tilted.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an example of the electric lifting device of this invention, and FIG. 2 is a circuit diagram showing an example of the electric circuit diagram of the same. DESCRIPTION OF SYMBOLS 1...Support cylinder body, 4...Elevating tube, 5...Resistance imparting member, 7...Female thread, 8...Threaded rod, 11...
Electric motor.

Claims (1)

[Scope of utility model registration request] A lifting cylinder that can be raised and lowered and rotated is fitted into the support cylinder, a seat is attached to the upper end of the lifting cylinder, and a threaded rod that is rotated forward and backward by an electric motor is screwed into the female thread at the lower end of the lifting cylinder, and this threaded rod is inserted into the lifting cylinder. In the electric lifting device for a hairdressing chair, the lifting tube is raised and lowered by the rotation of a threaded rod, in which a sleeve is fixed to the inner periphery of the supporting tube near the upper part, and the lifting tube is passed through the sleeve. , a plurality of circumferential grooves are formed on the inner periphery of the sleeve at intervals vertically, and a resistance imparting member made of rubber or the like that provides resistance to the elevating tube is fitted into each circumferential groove, and the magnitude of the resistance is determined by the electric motor. An electric lifting device for a hairdressing chair, characterized in that the torque is set to be greater than the torque applied to the cylinder and smaller than the torque applied from the seat.