JPH0245438Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a shutter opening/closing machine that can be made smaller and lighter without losing its robustness and can be easily maintained and inspected (IPC: E06B).

(Prior art) In general, the opening/closing mechanism of a shutter device is installed at a high place near the ceiling, and the space in which it is housed is also narrow, making it difficult to work on it. In many cases, it is safer and easier to work by removing the entire opening/closing machine and lowering it.
However, since the switchgear includes an electric motor, speed reducer, etc., and these are quite heavy, the task of lowering the entire switchgear is much more difficult than the intended repair and inspection work. There are many cases.

(Purpose of the invention) The present invention aims to replace the equipment that requires maintenance and inspection work in a shutter device, especially the brake device including brake shoes, with a precision mechanical system that is used as a shutter take-up shaft drive system including an electric motor, a speed reducer, etc. It is possible to easily carry out repairs and inspections with the opening/closing machine installed in the shutter device without breaking the coupling relationship, and it is also possible to carry out repairs and inspections easily when the opening/closing machine must be removed and lowered for work. To provide a shutter opening/closing machine which is made smaller and lighter without losing its robustness so that removal work can be easily performed even when the shutter is opened and closed.

(Structure of the invention) The invention originally consists of a brake device belonging to the shutter take-up shaft drive system, a brake body (brake drum) that rotates together with the drive system, and four brake pieces (brake shoes) that are in sliding contact with the brake body (brake drum). The remaining brake device (hereinafter simply referred to as the brake device) including the brake piece is configured to be detachable from the shutter winding shaft drive system, and a through bolt (hereinafter referred to as The structure connects the reducer housing and brake body housing together with the electric motor sandwiched in between (including long screws), making the electric motor part smaller and lighter, and furthermore, reinforcing the connection with the base. It is configured to do this.

In other words, the shutter opening/closing machine according to the present invention is
A reducer housing rotatably supports one end of the rotating shaft of the rotor of the electric motor, a brake body housing rotatably supports the other end, and a plurality of reducer housings are arranged in parallel around the rotating shaft. , a through bolt that connects the reducer housing and the brake body housing together by sandwiching the electric motor; The brake piece of the brake device is provided with a fixed base, and the brake piece of the brake device is fixed to the lower surface of the top plate of the base using screws or bolts through the opening provided in the base and the brake body housing. The brake cylinder is characterized in that it comes into separable sliding contact with the brake cylinder that rotates together with the rotating shaft within the brake cylinder housing. Hereinafter, the present invention will be described in detail according to embodiments shown in the drawings.

(Embodiment) In the illustrated embodiment, reference numeral 1 denotes a rotating shaft of a rotor of an electric motor M, one end of which is rotatably supported by a ball bearing 3 fixed to a reducer housing 2, and the other end of which is supported by a brake. It is also rotatably supported by a ball bearing 5 fixed to the trunk casing 4. A spline 6 that meshes with a gear of a reduction gear device is provided at the tip of the rotating shaft on the one end side that protrudes into the reducer housing beyond the corresponding ball bearing. A brake barrel 8 equipped with a centrifugal speed governor 7 is integrally fixed to the rotating shaft on the other end side that protrudes into the brake barrel housing by using a key. Reference numeral 10 denotes two through bolts provided parallel to the rotating shaft at an interval, and the electric motor is sandwiched between the bolts and the two casings are fixed together, so that the two casings are integrated into one body. A box-shaped base 9 with an open bottom plate portion is fixed to the lower side thereof. A limit switch device 12 and a brake device 14 are attached to the lower surface of the top plate portion of the base using screws, respectively. A gear 11 that meshes with the gear of the gear device is provided through the opening, and the brake device 1
4 is provided with a brake piece 13 that slides into contact with the brake cylinder from the outside through corresponding openings provided in the base and the brake cylinder housing. Similarly, a starting capacitor and other equipment requiring maintenance and inspection are hung and attached to the lower surface of the top plate of the base. Note that a separate lid is usually attached to the bottom plate portion of the base.

In this embodiment, when the electric motor is powered on to open the shutter, the rotational force of the electric motor is transmitted to a shutter take-up drum (not shown) through a reduction gear and the shutter is raised. The shutter is automatically stopped at the upper limit position by other control means (not shown) and becomes fully open. Then, when the brake is released to close the shutter,
The shutter descends while operating the centrifugal speed governor attached to the brake body, and at the lower limit position, the limit switch device connected to the gear device of the reduction gear operates, cutting off the power to the electric motor, and at the same time, the solenoid of the brake device is driven, whereby the brake piece comes into pressure contact with the brake body, and the rotation of the rotating shaft of the electric motor is stopped.

(Effects of the invention) Since the present invention is constructed as described above, the device can be made smaller and lighter without losing its robustness, and it can also be used for equipment that requires maintenance, especially for normal brake equipment including brake shoes. For repair and inspection work, it is possible to easily carry out repairs and inspections while the shutter is still installed, without having to disassemble the precise mechanical connection of the shutter take-up shaft drive system, which includes the electric motor, reducer, etc. effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the concept of essential parts of an embodiment of the present invention, and FIG. 2 is a detailed sectional view of a switchgear corresponding to FIG. 1. 1...Rotating shaft, 2...Reducer housing, 4...Brake body housing, 8...Brake body, 9...Base, 1
0...Through bolt, 13...Brake piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A reducer housing 2 that rotatably supports one end of a rotating shaft 1 of a rotor of an electric motor; a brake body housing 4 that also rotatably supports the other end; A plurality of through bolts 10 are arranged in parallel around the rotating shaft and connect the reducer housing and the brake body housing together by sandwiching the electric motor; and the two housings are integrated by sandwiching the electric motor. A brake piece 1 of a brake device 14 is provided with a base 9 fixed to the body on both sides below, and a brake piece 1 of a brake device 14 is fixed to the lower surface of the top plate of the base using screws or bolts.
3 is in separable sliding contact with a brake barrel 8 rotating together with the rotating shaft within the brake barrel housing through an opening provided in the base and the brake barrel housing. Opening/closing machine.