JPH028174A - Control device for winding drum type elevator - Google Patents

Abstract

PURPOSE:To prevent an actuation impossibility at cold time without enlarging the capacity of a main circuit element by registering an uppermost story call automatically at the time when the temp. of a machine chamber is less than a set temp. and making the uppermost story as the standby floor of a cage at cold time. CONSTITUTION:When the temp. of a machine chamber drops to the temp. effecting an adverse effect on the lubricity of an oil, the output voltage of a temp. - voltage convertor 12 drops as well. At this time the output voltage from the convertor 12 becomes lower than the reference voltage Vref of a reference voltage circuit 14. Namely, the output of an arithmetic amplifier 13 becomes H when the temp. of the machine chamber becomes less than the set temp. At this time, the output of a NOR gate 18 becomes H and the output 15a of an AND gate 15 becomes H as well because the output 16a of a cage call button 16 and that 17a of a riding spot call button 17 are L both if a cage call and riding spot call are not registered. So the control device having received the output 15a of H generates the command driving a winding up motor so as to move the cage to the uppermost story and the cage is moved to the uppermost story.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a control device for a winding drum elevator, and more particularly to a control device for a winding drum elevator that eliminates the inability to start a hoisting type A machine in cold weather.

[Conventional technology]

FIG. 3 is a schematic configuration diagram of a conventional control device for a drum-type elevator known from, for example, Japanese Patent Laid-Open No. 60-236986. In the figure, 1 is a hoisting motor consisting of a three-phase induction motor, 2 is a worm gear provided on the rotating shaft of the hoisting motor 1, 3 is a worm wheel that meshes with the worm gear 2, and 4 is a winding motor attached to the shaft of the worm wheel 3. One end of the rope 5 is connected to the winding drum 4, and the winding drum 4 is connected to one end of the rope 5.
It is possible to wind up and unwind the rope 5 by forward and reverse rotation of the rope, and the other end of the rope 5 is wound around a sheave 7 provided at the upper part 6 of the hoistway (not shown). A cage 8 is connected to the end of the rope hanging from the sheave 7. Reference numeral 9 generates a call registration device run command for registering hall and car calls. When this call registration device 9 registers a call, it outputs an operation command to the control device 10 and
The car is driven to the called floor. In the conventional elevator control device configured as described above, when a passenger presses a call button in the hall or in the elevator car 8 in order to use the elevator, the call registration device 9 detects this. For example, when the call is in the upward direction, the hoisting motor 1 winds the rope 5 around the winding drum 4, thereby raising the car 8. Further, when the call is in the downward direction, the car 8 is lowered by its own weight. However, in cold weather, the viscosity of the lubricating oil for the hoisting machine tends to increase, so if the lubricity of the bearings of the hoisting machine decreases and frictional resistance increases, the car 8 There was a risk that the system would not be able to start when a command was issued to raise it. For example, as disclosed in Japanese Patent Application Laid-Open No. 60-236986, in a IIJ control device for a hoisting elevator, when the rotational speed of the hoisting motor does not reach a predetermined value even after a predetermined period of time has elapsed from the start command, , the hoisting motor was placed in a non-excited state, eliminating the torque that suppresses rotation, thereby preventing the inability to start descending operation.

[Problem to be solved by the invention]

In the conventional drum elevator control device as described above,
Since the floor on which the car is stopped in a cold environment is not specified, if the car is abandoned on a floor other than the top floor and left in a cold environment for a long time, that floor is the lowest floor. When performing ascending operation even when the hoisting motor is on an intermediate floor or on an intermediate floor, the lubricity of the gear portion of the hoisting motor is reduced and frictional resistance is increased, so more torque is required than during normal ascending operation. Therefore, unless the capacitance of the main circuit element is selected to be large in consideration of the 1-lux increment due to the increase in frictional resistance, there is a risk that the engine will not be able to start. This invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to obtain a control device for a drum-type elevator that can prevent the inability to start in cold weather without increasing the capacity of the main circuit element. With the goal.

[Means for Solving the Problems] A control device for a winding drum elevator according to the present invention includes a temperature detecting means for detecting the temperature of a machine room, and a temperature detecting means for detecting a temperature when the room temperature detected by the temperature detecting means is below a set temperature. , a top floor call registration means for automatically registering the top floor call. [Function] In the control device C of the drum type elevator of this invention, when the temperature of the machine room in which the hoisting machine etc. is installed is below the set temperature, the top floor call registration means automatically registers the top floor call. , the car is operated upward to the top floor before the lubricity of the lubricating oil deteriorates, and the top floor is used as a standby floor for the car in cold weather, so the next start is always a downward movement, which reduces the lubricity of the oil. recovers and increases the capacitance of the main circuit elements.
Enables startup in cold weather.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram showing an embodiment of a control device for a drum type elevator according to the present invention, and FIG. 2 is a block diagram of a top floor call registration device according to the present invention. In the figure, parts that are the same as those in FIG. 3 are given the same reference numerals, and their explanation will be omitted, and different parts will be emphasized. That is, a top floor call registration device 11 has been newly added, and this top floor call registration device 11 automatically registers the top floor call when the room temperature in the machine room falls below a set temperature. A command 15a is output to the control device 10 to cause the elevator car to ascend from the stop floor to the top floor. Next, details of the top floor call registration device 11 will be described with reference to FIG. In FIG. 2, 12 is a temperature-voltage converter that converts a temperature change in the machine room detected by a temperature detection element such as a thermistor into a voltage change, and 3 is an operational amplifier. A temperature-voltage conversion type 12 is connected to an inverting input terminal of this operational amplifier 13, and a reference voltage V ref of a reference voltage circuit 14 is applied to a non-inverting input terminal. The reference voltage circuit 14 includes, for example, a +V power supply and resistors 14a and 14b connected in series between the ground. Further, the output of the operational amplifier 13 is input to one side of the AND gate 15. Reference numeral 16 constitutes a car call button for each floor, and when a call for any floor is registered, its output 16a becomes rHJ. Reference numeral 17 constitutes a call button for the landing on each floor, and when a call on any floor is registered, the output 17a is rHJ
becomes. The outputs 16a and 17a are input to a NOR gate 18, and the output of this NOR gate 18 is input to an AND gate 15.
is input on one side. And AND game 1.15
The output 15a is input to the control device 10 as an operation command for the top floor call. Next, the operation of the drum type elevator control device of this embodiment configured as described above will be explained. When the temperature of the machine room drops to a temperature that adversely affects the lubricity of oil during cold weather, the output voltage of the temperature-voltage converter 12 also drops. At this time, when the output voltage from the converter 12 becomes lower than the reference voltage Vref of the reference voltage circuit 14 (that is, when the temperature of the machine room becomes lower than the set temperature, the output of the operational amplifier type 13 becomes rHJ. At this time, If no car call or hall call is registered, the output 16a of the car call button 16 and the hall call button 17
Since the outputs 17a of both are rLJ, the output of the NOR gate 18 is rHJ, and the output 1 of the AND gate 15 is rLJ.
5a also becomes rHJ. Therefore, the control device 10 that receives the rHJ output 15a generates a command to drive the hoisting motor 1 to move the car 8 to the top floor, starts the hoisting motor 1, and moves the car 8 to the top floor. move it. That is, when the temperature of the machine room is below a predetermined temperature and there is no call registration, a top floor call is automatically generated, and the waiting floor for the car 8 at a temperature below the predetermined temperature is always set as the top floor. Therefore, during cold weather after the above-mentioned standby operation on the top floor,
When a call is registered in the call registration device 11, the elevator always goes into a descending operation, and this descending operation slightly softens the hardened lubricating oil and reduces the frictional resistance of the bearings, gear parts, etc. of the hoisting machine. become. This allows upward operation in cold weather without increasing the capacity of the main circuit element, and prevents inability to start in cold weather. [Effects of the Invention] As described above, according to the present invention, when the temperature of the machine room is below the set temperature, the top floor call is automatically registered, and the waiting floor of the car in cold weather is set as the top floor. When a call is registered after this standby operation on the top floor, the elevator car always operates downward, thereby softening the hardened lubricating oil a little. Therefore, the problem of increased frictional resistance due to hardening of the lubricating oil during ascending operation in cold weather is resolved, there is no need to take into account the increase in l/lux during ascending operation in cold weather, and it is no longer necessary to select a large capacity for the main circuit elements. Even though
This has the effect of preventing inability to start in cold weather.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of a control device for a drum elevator according to the present invention, FIG. 2 is a block diagram of a top floor call registration device according to the invention, and FIG. 3 is a conventional drum elevator control device. FIG. 2 is a configuration diagram of an elevator control device. 1. Hoisting motor, 2.. Worm gear, 3.. Worm wheel, 4. Volume IIM, 5. Rope, 8.. Car, 9. Call registration device, 10.. Control device, 11.. Top floor call. Registration device, 12 - Temperature-voltage converter, 13 Operational amplifier, 14 - Reference voltage circuit, 15 - ANDNO gate 16 - Car call button on each floor, 17... Hall call button on each floor,
18...NOR gate. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] In a winding drum type elevator that has a hoisting motor installed in a machine room and a winding drum that is rotated by the hoisting motor and winds up a rope connected to a car, there is provided a temperature detecting means for detecting the temperature of the machine room, and a temperature detecting means for detecting the temperature by the temperature detecting means. and a top floor call registration device that registers a top floor call when the temperature in a machine room becomes lower than a set temperature.