JPH06239556A - Overload detector for household elevator - Google Patents

Abstract

PURPOSE: To inform occupants in an elevator car that the car is overloaded by pressing microswitches relatively by means of the car so that the overload on the car is detected. CONSTITUTION: This device includes a car frame 8 supporting the floor face part 2a of a car 2 directly provided therein, a pair of car side sheaves 10, 11 rotatably provided in the car frame 8, a rope 12 wound on the pair of car side sheaves 10, 11 for lifting the car 2 while underslinging it from below, and microswitches 33, 34 for detecting the overload on the car 2. The microswitches 33, 34 are attached to the car frame 8 or the rope 12 and relatively pressed by the car 2 so as to detect the overload on the car 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home elevator overload detection device for detecting an overload on a car.

[0002]

2. Description of the Related Art In a hoistway in which an elevator car is vertically movable, if the top clearance cannot be sufficiently secured, a lift-up type elevator that does not require the top clearance is used. An example of a lift-up type elevator is shown in FIG. In the figure, a car 101 has a car frame 10
2 is provided, and a pair of car-side sheaves 10 are provided in the plank channel 102a below the car frame 102.
3, 104 are rotatably attached. A rope 105 is hung on the car-side sheaves 103 and 104 to hang the car 101 from below. When the rope 105 is towed by the hoist, the car 101 moves up and down.

By the way, a load cell for detecting a load applied to the car 101 may be interposed between the plank channel 102a and the floor surface portion 101a of the car 101. That is, an angle is attached to the plank channel 102a, a load cell is provided at this angle via a bracket, and the floor surface portion 101a of the car 101 is placed on this load cell.

When the load cell is thus interposed between the plank channel 102a and the floor surface portion 101a, the angle, the bracket and the load cell are located between them, and then the plank channel 102 is formed.
The car 101 is slightly separated from a, and the height from the plank channel 102a to the upper surface of the car 101 becomes high (that is, it penetrates through the top clearance).

In the home elevator where the hoistway is designed to the minimum and the top clearance is not secured at all, the load cell cannot be interposed between the plank channel 102a and the floor 101a of the car 101.
The floor surface portion 101a is directly provided on the plank channel 102a.

[0006]

In such a conventional home elevator, the plank channel 102 is used.
Since the load cell is not interposed between a and the floor portion 101a of the car 101, the load of the passenger on the car 101 cannot be detected. In this case, the car 101 may be overloaded, and in such a case, it cannot be determined that the car is overloaded, and the car 101 is moved up and down by the hoisting machine. Then, the car 101 has a problem that the hoisting machine does not have enough driving force and is trapped between the halls (canned) or descends and significantly goes over the bottom floor hall (pushing down). It was

It is an object of the present invention to provide an overload detecting device capable of detecting this overload when the load on the car of the home elevator is overloaded.

[0008]

In order to achieve such an object, according to the present invention, a car frame which is directly provided with a car floor surface portion and which supports the floor surface portion, and a car frame frame A pair of car-side sheaves that are rotatably provided, a rope that is hung on the pair of car-side sheaves and that raises the car while hoisting it from below, and a loading switch that detects an overload on the car. And the loading switch is attached to the car frame frame side or the rope side, and the overload on the car is detected by relatively pressing the loading switch with the car.

[0009]

When the passenger in the car exceeds the capacity, the weight of the passenger causes the car to sink deeper than usual.
When the capacity is over, the car descends and the car frame also descends at the same time. When the car frame frame moves down, the loading switch moves downward. Here, the rope is normally fixed to the car in place. Therefore, in the loading switch moving downward, the contact portion is relatively pressed by the rope side to detect the overcapacity.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 6 are views showing an embodiment of an overload detecting device for a home elevator according to the present invention.

In FIG. 1, reference numeral 1 is a hoistway for a home elevator provided in a house, which is composed of a steel tower. A car 2 is arranged in the hoistway 1 so as to be vertically movable, and the car 2 is vertically guided by a pair of guide rails 3 and 4 provided upright on both sides.

As shown in FIGS. 2 and 3, the car 2 is provided with a car frame frame composed of crosshead channels 5, upright channels 6 and 7 and plank channels 8. The plank channels 8 have floors of the cars 2 provided therein. The surface portion 2a is directly provided. A support channel 9 is attached to a portion of the upright channels 6 and 7 below the plank channel 8, and a pair of car-side sheaves 10 are provided at both ends of the support channel 9.
11 is rotatably attached. Sheave 1 on the basket side
A rope 12 is hung on 0 and 11 so as to lift the car 2 from the lower side.

Here, one end of the rope 12 is fixed to the top of the steel tower 1, and then the car-side sheave 1 under the car 2 is attached.
It is multiplied by 0 and 11, and an overhead sheave 1
3. After being hung on the drive sheave 14a of the hoisting machine 14, the overhead sheave 15, and the sheave 16a attached to the counterweight 16, the other end is fixed to the top of the steel tower 1.

The counterweight 16 is in balance with the car 2, and when the drive sheave 14a is rotated by the hoisting machine 14, the car 2 and the counterweight 16 move up and down in a slipping manner. Further, a control panel 17 is disposed on the side of the steel tower 1, and the control panel 17 controls the drive of an operator (not shown) that opens and closes the hoisting machine 14 and the door of the car 2.

A brake mechanism 18 is provided on the lower side of the car 2, that is, on the plank channel 8 and the support channel 9 to prevent the car 2 from dropping when the rope 12 is broken. That is, a safety rod 20 is rotatably supported by the plank channel 8 via a support piece 19, and a drive arm 21 is fixed to the safety rod 20 substantially at the center thereof as shown in FIG. A drive bolt 23 is connected to the drive bolt 23 via a connecting pin 22 inserted in a long hole 21a formed therein.

The drive bolt 23 is loosely inserted into a hole (not shown) of a support piece 24 attached to the support channel 9, and the tip thereof is screwed into a support member 25 having a substantially U-shaped cross section. . A safety roller 26 that comes into contact with the rope 12 is rotatably supported on the support member 25 via a pin 27, and the pin 27 of the support member 25 supports the support piece 2.
It is loosely inserted in the eight elongated holes 28a. Further, the compression spring 30 is compressed between the support piece 24 and the nut 29 fixed to the drive bolt 23.

Further, as shown in FIGS. 5 and 6, the support channel 9 has a support piece 31 having a substantially L-shaped cross section.
A first bracket 31 having a is attached by a screw, and a U-shaped notch 32 is provided at a substantially central portion of the support piece 31a.
Are formed. The drive bolt 23 is located in the notch 32, so that the drive bolt 23 can move up and down regardless of the first bracket 31.

A pair of micro switches 33 and 34 (loading switches) are fixed to both sides (corresponding to the front and rear ends of the car 2) of the support piece 31a of the first bracket 31. The micro switches 33 and 34 are mechanical switches that have minute contact points and a snap action mechanism, and open and close with a specified movement and force, and detect whether the load applied to the car 2 exceeds a predetermined value (capacity over). It is for. The contact points 33a and 34a of the microswitches 33 and 34 penetrate the first bracket 31 and project downward.

On the other hand, a substantially flat plate-shaped second bracket 35 is attached to the upper side of the support member 25, and a pair of pressing bolts 36 and 37 facing the microswitches 33 and 34 are provided on both sides of the second bracket 35. It is installed. When the pressing bolts 36 and 37 move relatively upward, the tip ends of the contact points 3 of the microswitches 33 and 34.
3a and 34a are contacted and pressed. When the contact points 33a, 34a of the microswitches 33, 34 are pressed, the microswitches 33, 34 are activated and a signal is output to the control panel 17.

On the other hand, a pair of driven arms 3 is provided on both ends of the safety rod 20 (that is, on the guide rails 3, 4 side).
8, 39 are fixed. A safety lever 41 is connected to one driven arm 38 via a pin 40, and a pressing roller 42 is rotatably attached to the tip end side of the safety lever 41. The pressure roller 42 is a safety block 43 attached to the upright channel 7 with a bolt.
The guide rail 3 is loosely fitted in the groove 44, and the groove 44 has an inclined surface 44a.

When the safety lever 41 is pulled up in FIG. 4, the pressing roller 42 moving along the inclined surface 44a presses the guide rail 3, and in cooperation with the safety block 43, the guide rail 3 is held. To do. The other driven arm 39 side has the same structure as the above, and the description thereof will be omitted.

When a passenger in the car 2 exceeds the capacity, the car 2 sinks deeper than usual due to the weight of the passenger. When the capacity is over, the car 2 descends and the plank channel 8 simultaneously descends. When the plank channel 8 descends, the micro switches 33 and 34 move downward via the support channel 9 and the first bracket 31.

Here, the roller 26 rides on the rope 12 and is in a predetermined position as usual (in a fixed state with respect to the car 2). Therefore, in the micro switches 33 and 34 moving downward, the contact portions 33a and 34a are relatively pressed by the pressing bolts 36 and 37 to detect the overcapacity, and signals from both the micro switches 33 and 34 are controlled. It is output to the board 17. In response to an instruction from the control panel 17, a warning device such as a buzzer provided in the car 2 is activated to notify the passengers in the car 2 that the capacity is over.

By the way, even if the number of passengers in the car 2 is within the capacity, if the car 2 is biased to any one of the front and rear positions in the car 2, the car 2 may tilt slightly in either the front or rear direction. Become. When the car 2 tilts, either the left or right ends of the first bracket 31 in FIG. 2 also tilt through the plank channel 8 and the like.

Then, the pair of micro switches 3
Press bolts 36, 3 with either one of 3, 3 facing each other
It operates by being touched and pressed by 7. However, only one of the pair of micro switches 33 and 34 controls the control panel 1
Even if a signal is output to 7, unless the signals are output from both, the control panel 17 does not determine that the load is overloaded. Therefore, even if the passengers within the seating capacity deviate to the car 2 and get on the car 2, it is not erroneously determined to be overloaded, and the elevator operates normally.

Although the microswitches 33 and 34 are attached to the plank channel 8 side, they may be attached to the rope 12 side. In this case, the plank channel that descends the microswitches 33 and 34 attached to the rope 12 side. It will be pressed by the member attached to 8.

[0027]

As described above, according to the present invention,
Since the loading switch is attached to the car frame frame side or the rope side and the loading switch is relatively pressed by the car to detect the overload on this car, it is possible to detect the overload in the car. Can notify passengers, etc. As a result, the load applied to the car can be kept within a predetermined value, which in turn can prevent the occurrence of a canned state and the thrusting down.

[Brief description of drawings]

FIG. 1 is a perspective view of a home elevator in which a home elevator overload detection device according to the present invention is used.

FIG. 2 is a front view of this overload detection device.

FIG. 3 is a side view of this overload detection device.

FIG. 4 is an enlarged side view of the micro switch.

FIG. 5 is an enlarged front view of the micro switch.

6 is a sectional view taken along the line AA in FIG.

FIG. 7 is a front view of a conventional home elevator car.

[Explanation of symbols]

 2 ... Cage 2a ... Floor surface 8 ... Planck channel 11, 12 ... Cage side sheave 12 ... Rope 33, 34 ... Micro switch

Claims (1)

[Claims] 1. A car frame which is directly provided with a floor of a car and which supports the floor, a pair of car-side sheaves rotatably provided on the car frame, and a pair of the car-side sheaves. A loading switch for detecting an overload on the car and a rope for lifting the hanging car from the lower side and attaching the loading switch to the car frame frame side or the rope side. An overload detecting device for a home elevator, wherein an overload applied to the car is detected by relatively pressing the car.