JPH08245109A - Elevator load detection device - Google Patents

Abstract

PURPOSE: To provide an elevator load detection device capable of installing a differential transformer, etc., which are load detection elements at an optional position under a cage floor by a single kind of an installation bracket regardless of an elevator specification and reducing cost by mass production. CONSTITUTION: An elevator load detection device to detect size of a load in a cage room in accordance with displacement quantity of the cage room against a cage frame is furnished with a flat plate type adapter 20 provided free to install by way of sliding it in the horizontal direction against a lower beam 11 of the cage frame, a fitting bracket 26 provided with its base end free to fix on an optional position on this adapter 20 and a differential transformer 15 for displacement detection interposed between a head end portion of this fitting bracket 26 and the cage room. A limit switch 14 for limit load detection is interposed between the head end portion of the fitting bracket 26 and the cage room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator load detecting device for detecting the magnitude of a load in a car room based on a displacement amount of the car room with respect to a car frame.

[0002]

2. Description of the Related Art FIGS. 3A and 3B are a side view and a partial top view showing a structure of a general rope type elevator. As shown in the figure, the rope-type elevator is equipped with a car 4 and a counterweight 5 at both ends of the main rope 3 wound around the main sheave 2 of the hoisting machine 1 installed in the machine room above the hoistway. An electric motor 6 incorporated in the hoisting and hoisting machine 1 controls the raising and lowering of the car 4.

FIG. 4 is a side sectional view showing the structure of the car 4 of the rope type elevator. As shown in FIG.
A car floor 8 is provided at the lower end of the car room 7. The lower side surface of the car floor 8 is placed on a floor receiving frame 10 via a vibration-proof rubber 9. The central portion of the lower side surface of the floor receiving frame 10 is supported by the lower beam 11 of the car frame. Reference numeral 12 is a floor reinforcing member, and 13 is an L-shaped support member provided on the car floor 8.

FIG. 5 is a diagram showing an example of a conventional elevator load detection device provided in the elevator car 4 described above. The illustrated elevator load detection device is an example in which both a differential transformer 15 for detecting the amount of displacement of the car room 7 with respect to the car frame and a limit switch 14 for detecting the limit load are installed. The core 15b of the differential transformer 15 is attached to the L-shaped support member 13 provided at the lower end of the car floor 8. The main body 15a of the differential transformer 15 is attached to a vertical wall 16V of a mounting bracket 16 connected to the flange portion of the lower beam 11.

Thus, when a load is applied to the car floor 7 on the car floor 8, the anti-vibration rubber 9 is compressed, and the positions of the L-shaped support member 13 and the differential transformer core 15b are interlocked with each other as shown by arrows in FIG. The relative position of the differential transformer core 15b with respect to the main body 15a of the differential transformer changes, and the voltage change caused by the change is detected.

The limit switch 14 is mounted on a support plate 17 attached to the floor reinforcing member 12, and a switching pressing pin 18 is screwed into a horizontal wall 16H of the mounting bracket 16. The pressing pin 18 has a pressing portion 18a on the head, and a slit 18b is processed at the tip of the leg so that it can be rotated by a driver.

Thus, the car floor 8 is loaded and the rubber vibration isolator 9 is compressed, and the limit switch 14 is interlocked with it.
When the position of the button 14a is lowered to the set level, the button 14a comes into contact with the pressing portion 18a of the pressing pin 18 mounted on the horizontal wall 16H of the mounting bracket 16, and the limit switch 14 is turned on.

[0008]

The conventional elevator load detection device constructed as described above has the following problems. Considering that the load may be an eccentric load, it is desirable that the differential transformer 15 be installed at the center position between the anti-vibration rubbers 9. However, depending on the specifications of each elevator, the L-shaped support member 13 is not always arranged at the center of the car floor 8. Therefore, it is necessary to dispose the differential transformer 15 at a position other than the above position.

On the other hand, in order to adjust the axial position of the pressing pin 18, it is necessary to insert a driver from below into the slit 18b of the pressing pin 18. For this reason, it is necessary to dispose the pressing pin 18 at a position displaced outward from the end of the lower beam 11.

Under these circumstances, the mounting bracket 16
If there is only one type, it may not be possible to arrange the differential transformer 15 or the like at a required position, and in the case of an unbalanced load,
Detection error may occur. Therefore, it is necessary to change the dimensions and the like of the mounting bracket 16 according to the specifications of each elevator to manufacture a large number of types, and there is a problem that mass production cannot be performed.

An object of the present invention is to enable a differential transformer, which is a load detecting element, to be mounted at an arbitrary position under the floor of a car with a single type of mounting bracket regardless of the elevator specifications, thereby reducing the cost by mass production. An object of the present invention is to provide a possible elevator load detection device.

[0012]

In order to solve the above problems and achieve the object, the elevator load detecting apparatus of the present invention is configured as follows.

(1) In the elevator load detecting device of the present invention, the elevator load detecting device for detecting the magnitude of the load in the car room based on the amount of displacement of the car room with respect to the car frame, with respect to the lower beam of the car frame. A flat plate-shaped adapter that can be mounted by sliding horizontally, a mounting bracket that can fix the base end to any position on this adapter, the tip part of this mounting bracket, and the cab. And a differential transformer for detecting displacement which is interposed between and.

(2) The elevator load detecting device of the present invention is the device according to (1) above, and the flat adapter has a fastening hole made of an elongated hole whose mounting position can be adjusted. There is.

(3) The elevator load detecting device of the present invention is the device described in (2) above, and the fastening hole has a concavo-convex portion for preventing a fastening position shift at the side edge of the long hole.

(4) The elevator load detecting device of the present invention is the device described in (1) above, and further includes a limit switch for detecting a limit load between the tip portion of the mounting bracket and the cab. I am letting you.

(5) An elevator load detection device according to the present invention is the device described in (4) above, and the limit switch has a limit switch main body mounted in a cab and a switching switch mounted on a mounting bracket. The pressing pin has a threaded portion screwed into the tip portion of the mounting bracket, and a head portion has a nut portion for rotating operation.

[0018]

As a result of taking the above-mentioned means (1) to (5), the following operations will occur.

(1) In the elevator load detection device of the present invention, the base end of the mounting bracket in which the differential transformer main body or the differential transformer core is mounted is preliminarily slid in the horizontal direction so as to have a flat plate shape. It can be fixed at any position of the adapter. Therefore, the mounting position of the differential transformer is changed due to each elevator specification, and the relative displacement between the mounting bracket and the lower beam caused by the change is covered by the presence of the adapter. Therefore, the mounting bracket itself may be a single type that is manufactured to the specified dimensions, and such a mounting bracket can be fastened to the lower beam without any problems, so that the differential transformer can be mounted at any place under the floor of the car. It becomes possible.

(2) In the elevator load detecting device of the present invention, the function of adjusting the mounting position by sliding the adapter in the horizontal direction is obtained by the fastening hole made of a long hole, so that the structure is simple and the manufacture is easy. .

(3) In the elevator load detecting device of the present invention, when fastening using the elongated hole of the adapter, the concavo-convex portion provided on the side edge of the elongated hole is engaged with the fastening bolt or the like. Displacement is prevented.

(4) In the elevator load detection device of the present invention, the limit switch is turned on when the load reaches the limit, and an alarm is generated and the elevator operation is stopped. Becomes

(5) In the elevator load detection device of the present invention, since the head portion of the switching push pin of the limit switch is provided with the nut portion, the push pin is lowered as the mounting position of the mounting bracket moves. Even if the beam is hidden behind the beam, it is possible to insert a tool such as a spanner from the horizontal direction and rotate the pressing pin.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of essential parts showing the construction of an elevator load detecting apparatus according to an embodiment of the present invention. As shown in FIG. 1, a flat plate-shaped adapter 20 is provided between the lower beam 11 and the mounting bracket 26 so as to be slidable to an arbitrary position with respect to the lower beam 11. The lower beam 11 and the adapter 20, and the adapter 20 and the mounting bracket 26 are fastened with bolts (not shown).

FIG. 2A is a plan view showing an example of the adapter 20. As shown in the figure, the rectangular plate body is provided with fastening holes 21, 22, 23a to 23d. The fastening holes 21 and 22 are for fastening to the mounting bracket 26. The fastening holes 21 and 22 are used for the differential transformer 15 attached to the mounting bracket 26 fastened here.
Is provided at a position suitable for each elevator specification. The fastening holes 23a to 23d are for fastening to the lower beam 11, and are long holes that can be slid in the left-right direction in the drawing in order to adjust the position of the differential transformer 15.

FIG. 2B shows an example of the pressing pin 28. A nut 28a whose surface in contact with the button 14a of the limit switch 14 is flat-processed so that it can be adjusted with a spanner,
It is welded to the head of the bolt body 28c. The nut 28a and the bolt body 28c may be integrally provided by cutting. The bolt tip portion 28b is not provided with a conventional slit, but may be provided if necessary.

Returning to FIG. By adopting the pressing pin 28, the length of the upper side wall 26H of the mounting bracket 26 can be unified to the minimum length within a range in which the limit switch 14 and the differential transformer core 15b do not interfere with each other. By installing the adapter 20, the mounting bracket 2
The length of the lower side wall 26L of 6 can be unified.

(Modification) The present invention is not limited to the above-mentioned embodiment, but includes the following modifications.

(A) The mounting bracket fastening holes 21 and 22 of the adapter 20 are also long holes so that the fastening position can be adjusted.

(B) Lower beam fastening hole 23 of the adapter 20
A long hole is used for a to 23d so that a large fastening position can be adjusted.

(C) A concavo-convex portion such as a corrugated or sawtooth shape is formed on the side edge of the long hole so that the fastening position is not displaced at the fastening position using the fastening hole made of the long hole.

(D) The adapter 20 is formed by stacking two relatively slidable plate-like members on top of each other to expand the position adjustment range.

(Summary of Embodiments) The configuration and operational effects shown in the embodiments are summarized as follows.

[1] The elevator load detection device shown in the embodiment is an elevator load detection device for detecting the magnitude of the load in the car room based on the displacement amount of the car room with respect to the car frame. A flat plate-like adapter 20 is provided so as to be slidably attached to the lower beam 11, and a mounting bracket 26 is provided so that the base end can be fixed to any position on the adapter 20.
And a differential transformer 15 for displacement detection interposed between the tip portion of the mounting bracket 26 and the cab.

Therefore, in the above elevator load detecting apparatus, the flat adapter 20 whose position is adjusted by previously sliding the base end of the mounting bracket 26 with the differential transformer body 15a or the differential transformer core 15b mounted in the horizontal direction is adjusted. Can be fixed at any position. For this reason, the differential transformer 1
The mounting position of 5 is changed, and the relative displacement between the mounting bracket 26 and the lower beam 11 caused by this change is covered by the presence of the adapter 20.
Therefore, the mounting bracket 26 itself may be of a single type manufactured to a specified size, and the mounting bracket 26 can be fastened to the lower beam 11 without any trouble, so that the differential transformer 15 is ultimately installed under the car floor 8. It is possible to attach it to any place.

[2] The elevator load detection device shown in the embodiment is the device described in [1] above, and the flat adapter 20 is a fastening member having an elongated hole whose mounting position can be adjusted. The holes 23a to 23d are provided.

Therefore, in the above elevator load detection device, the function of adjusting the mounting position by sliding the adapter 20 in the horizontal direction is such that the fastening holes 23a, which are elongated holes, are formed.
Since it is obtained by 23d, the structure is simple and the manufacture is easy.

[3] The elevator load detection device shown in the embodiment is the device described in [2] above, and the fastening holes 23a to 23d are the concave and convex portions for preventing the fastening position deviation on the side edges of the long holes. Have.

Therefore, in the above elevator load detection device, when fastening using the elongated hole of the adapter 20, the uneven portion provided on the side edge of the elongated hole engages with the fastening bolt or the like, so that the fastening position shifts. Is prevented.

[4] The elevator load detection device shown in the embodiment is the device described in [1] above, and is for detecting a limit load between the tip portion of the mounting bracket 26 and the cab. The limit switch 14 is interposed.

Therefore, the above-mentioned elevator load detection device is provided with a function of turning on the limit switch 14 when the load reaches the limit, generating an alarm, stopping the operation of the elevator, and the like.

[5] The elevator load detection device shown in the embodiment is the device described in [4] above, and the limit switch includes the limit switch main body 14 mounted in the cab and the mounting bracket 26. And a pressing pin 28 for switching attached to the pressing pin 2
Reference numeral 8 has a threaded portion screwed into the tip portion of the mounting bracket 26, and has a nut portion 28a for rotating operation on the head portion.

Therefore, in the above elevator load detection device, since the nut portion 28a is provided on the head of the switching push pin 28 of the limit switch 14, the push pin 28 moves as the mounting position of the mounting bracket 26 moves. Even if it is hidden behind the lower beam 11, a tool such as a spanner is inserted from the horizontal direction to push the pin 2.
8 can be rotated.

[0044]

According to the present invention, a differential transformer, which is a load detecting element, can be mounted at an arbitrary position under the floor of a car with a single type of mounting bracket, regardless of the elevator specifications. An elevator load detection device that can reduce costs can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing the configuration of an elevator load detection device according to an embodiment of the present invention.

2A and 2B are diagrams according to an embodiment of the present invention, FIG. 2A is a plan view showing an example of an adapter, and FIG. 2B is a side view showing an example of a pressing pin.

3A and 3B are diagrams showing a structure of a conventional general rope-type elevator, in which FIG. 3A is a side view and FIG. 3B is a partial top view.

FIG. 4 is a side sectional view showing a structure of a conventional elevator car for a rope type elevator.

FIG. 5 is a sectional view showing an example of a conventional elevator load detection device.

[Explanation of reference numerals] 8 ... Car floor 10 ... Floor receiving frame 11 ... Lower beam 12 ... Floor reinforcing member 13 ... L-type support member 14 ... Limit switch 14a ... Limit switch button 15 ... Differential transformer 15a ... Differential transformer main body 15b ... Differential transformer core 26 ... Mounting bracket 17 ... Support plate 28 ... Pressing pin 28a ... Nut 28b ... Bolt tip portion 28c ... Bolt body 20 ... Adapter 21 ... Fastening hole 22 ... Fastening hole 23a-23d ... Fastening hole

Claims (5)

[Claims] 1. An elevator load detection device for detecting the magnitude of a load in the car room based on the amount of displacement of the car room with respect to the car frame, which can be mounted by sliding horizontally on the lower beam of the car frame. Plate-like adapter provided as described above, a mounting bracket whose base end can be fixed to any position on this adapter, and displacement detection interposed between the tip portion of this mounting bracket and the cab. And a differential transformer for use in the elevator load detection apparatus. 2. The elevator load detection device according to claim 1, wherein the flat adapter has a fastening hole formed of an elongated hole whose mounting position can be adjusted. 3. The elevator load detection device according to claim 2, wherein the fastening hole has a concavo-convex portion for preventing a fastening position shift on a side edge of the long hole. 4. The elevator load detection device according to claim 1, wherein a limit switch for detecting a limit load is interposed between the tip portion of the mounting bracket and the cab. 5. A limit switch comprises a limit switch body mounted in a cab and a switching pressing pin mounted in a mounting bracket, the pressing pin having a threaded portion screwed into a tip portion of the mounting bracket, The elevator load detection device according to claim 4, wherein the portion has a nut portion for rotating operation.