JPH08217352A - Reset action confirming method of plunger in oil buffer - Google Patents

Abstract

PURPOSE: To provide a reset action confirming method of a plunger in an oil buffer capable of accurately further easily measuring a moving time by only a reset spring body provided in a cylinder of the plunger without causing misunderstanding by an examiner. CONSTITUTION: In this point of invention, after ending a process of lowering down a head part of a plunger 8 to a final lower end position by pulling downward a long scaled unit 14, in a condition that it is removed from the head part of the plunger 8, a time for resetting the plunger 8 to the original position is measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for confirming a plunger return operation of an oil buffer erected on the inner bottom of a hoistway such as an elevator.

[0002]

2. Description of the Related Art Conventionally, as a method for confirming a plunger return operation of an oil buffer, as shown in Japanese Patent Publication No. 2-58579, two hooks provided on the outer circumference of the oil buffer cylinder and these hooks are provided. One of which is hooked at one end thereof, the middle of which is hooked on the plunger head of the oil buffer, and the other end of which is connected to the belt winding device, and the other of the hooks. One end is locked to
And, using the return test device of the oil buffer consisting of the connecting body having the other end connected to the belt winding device, after the belt is wound into the belt winding device and the plunger is lowered to the final lower end position, By rewinding the belt wound in the belt retractor, the plunger is returned to its original state, that is, the predetermined upper end position, and the movement time from the final lower end position of the plunger to the predetermined upper end position is measured. There was a known method of confirming the plunger buffer return operation of the oil buffer.

[0003]

In the above-mentioned conventional plunger return operation confirmation method, when the plunger moves from the final lower end position of the plunger to a predetermined upper end position, the belt is hung on the head of the plunger. Since it is in the passed state, the plunger rises when the weight of the belt, the belt retractor and the connecting body is applied to the head of the plunger, and the return spring provided in the cylinder of the plunger. It is difficult to accurately measure the travel time by only the body, and there is a risk that the examiner will be misunderstood that the belt is used to hold the plunger up so that it does not exceed the test pass time (90 seconds). There was a problem that there is.

An object of the present invention is to provide a method for confirming a plunger return operation of an oil buffer, which can correctly and easily measure a moving time only by a return spring body provided in a cylinder of a plunger without causing the above-mentioned misunderstanding. There is.

[0005]

The above object is to suspend a long body from the head of a plunger of an oil buffer which is erected at the bottom of the pit of the hoistway, and to plan the end of the long body. An attaching step of attaching to a fixed part other than the jar, a lowering step of pulling the elongated body downward to lower the plunger head to a final lower end position after the attaching step, and a step of lowering the length after the lowering step. By the measurement step of measuring the time until the plunger head returns to its original position with the scale removed from the plunger head, by confirming the plunger return operation,
Achieved.

[0006]

According to this method, the long body is hung on the plunger head until the plunger head returns to the original position after the plunger head descends to the final lower end position. Since it is not done, there is no misunderstanding that the rise of the plunger is held within the length of time for passing the test of the plunger with a long body, and the head of the plunger is
The time from the final lower end position to the return to the original position can be the return time of the plunger only by the return spring body provided in the cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, in a hoistway 1 such as an elevator installed in a building or the like, a car 2 is provided so as to be guided vertically by two guide rails 3 and 3a. The guide rails 3 and 3a are fixed to the inner wall of the hoistway 1 using a plurality of rail brackets 4. A rope 5 is attached to the upper surface of the car 2. At the other end of the rope 5, a counterweight (not shown) is installed. By moving the rope 5 up and down, the car 2 moves up and down along the guide rails 3 and 3a. An oil buffer 6 is erected on the inner bottom 1b of the pit 1a of the hoistway 1.

The oil buffer 6 is, as shown in FIG.
A cylindrical cylinder 7 filled with oil, a cylindrical plunger 8 slidably fitted in the cylinder 7, and a direction provided in the cylinder 7 and for moving the plunger 8 upward A return spring body 9 that urges in the (returning direction), and stands from the bottom surface of the cylinder 7, and
The plunger 8 has an adjusting rod 10 that is fitted in the oil spray hole 8a. An air hole 8b is formed on the upper side surface of the plunger 8. A cushioning member 11 made of elastic rubber or the like is fixed to the upper surface of the plunger 8 with a fastener such as a countersunk screw using an oil injection port (not shown) provided on the upper surface of the plunger 8. ing.
A large diameter portion 8c is formed at the upper end of the plunger 8.

The recovery test device 12 for the oil buffer 6 is
The belt retractor 13 and one end 14a thereof are attached to a fixed portion other than the plunger 8, and the intermediate portion is suspended on a cushioning member 11 provided on the upper surface of the plunger 8, and the other end 14b thereof is a belt retractor. A long body (hereinafter referred to as a belt) 14 made of a nylon belt or the like that is attached to the catching device 13 so that it can be rolled up, and one end 15a is attached to a fixed portion other than the plunger 8 and the other end 15b.
Has at least a nylon connector 15 connected to the belt retractor 13. In this embodiment, the fixed portion other than the plunger 8 is the cylinder 7, and the metal fittings 16 and 16a are fixed to the outer peripheral wall 7a of the cylinder 7, and one end 14a of the belt 14 and the connecting body 15 are fixed to the metal fittings 16 and 16a. One end 15a is a delta ring fitting 17, 17a
It is detachably attached using. The fixed portion to which the belt 14 and the connecting body 15 are attached is not limited to the outer peripheral wall 7a of the cylinder 7, but a plunger such as a pedestal portion for standing the oil buffer 6 on the inner bottom 1b of the pit 1a. It may be any part other than 8. Further, the one end 14a of the belt 14 and the one end 15a of the connecting body 15 are fixed parts other than the plunger 8, and the hook 1
In the state where it is attached to 6, 16a, as shown in FIG.
The length of the connector 15 is set so that the belt retractor 13 is located outside the cylinder 7.

A head guide member 18 as shown in FIG. 4 is mounted on the cushioning member 11 of the plunger 8. The head guide member 18 includes the belt 14 and the plunger 8
The first flat plate 19 is provided on both sides of the first flat plate 19, and the first flat plate 19 is provided so as to be able to be wound into the belt winding device 13 without being displaced from the upper surface of the cushioning member 11. From the first hanging pieces 19a, 19b engageable with the outer circumference of the upper end of the plunger 8, and the rising pieces 19c, 19b provided on the side of the first flat plate 19 and for preventing the belt 14 from falling off. And a second plane plate 20 made of a steel plate, and second hanging pieces 20a, 20b provided on both sides of the second plane plate 20 and engageable with the outer periphery of the upper end of the plunger 8. Having the head guide support B made of a steel plate, the head guide support B is located below the head guide A, and
The head guide support B and the head guide A are configured to be rotatable around the shaft 21.

When performing a return test of the oil buffer 6 in the return test device 12 having the above-mentioned configuration, the following (1)
The operation may be performed according to the procedure from (10) to (10).

(1) The burnable dustproof cover made of an incombustible material attached to the oil buffer 6 is removed in advance.

(2) The amount of oil in the cylinder 7 of the oil buffer 6 is confirmed, and when the amount of oil is small, the oil is injected into the cylinder 7 so that the amount of oil reaches the specified value.

(3) A hook 16 is attached to the lower portion of the outer periphery of the cylinder 7, and a head guide member 18 is attached to the upper surface of the cushioning member 11 on the plunger 8.

(4) Attach the belt 14 to the head guide member 1
8 and then the delta ring metal fitting 17 of the belt 14 and the delta ring metal fitting 17a of the connecting body 15 are hooked metal fittings 16, 1
The recovery test device 12 is installed in the oil buffer 6 as shown in FIG.

(5) Lever 13a of belt winding device 13
The belt 14 is wound around the drum 13b of the belt winding device 13 by opening and closing a plurality of times, and the plunger 8 is intermittently lowered.

(6) When the belt 14 is wound around the drum 13b and the plunger 8 is lowered to the end of the plunger stroke as shown in FIG.
3a open, and drum 13b and ratchet 13c
And the lever 13a and the bracket 13d are disengaged, and the head guide member 18 and the belt 14 are
As shown in FIG. 6, the plunger 8 is detached from the cushioning member 11 provided on the head of the plunger 8.

(7) Drum 13b and ratchet 13c
The time until the plunger 8 returns to its original state after the engagement between the lever 13a and the bracket 13d is released is measured. If this measurement time is within 90 seconds, the oil buffer 6 passes the restoration test.

(8) Remove the delta ring fittings 17 and 17a of the belt 14 and the connecting body 15 from the hanging fittings 16 and 16a.

(9) Threaded portion 16b of the hooks 16 and 16a
Loosen and move to the bottom of the cylinder 7.

(10) A dustproof cover is attached to the oil buffer 6.

In this way, by carrying out the operations (1) to (10), all the recovery test operations are completed. In the step (7) above, when measuring the time required for the plunger 8 to return to its original state, the belt 14 and the head guide member 18 were removed from the cushioning member 11 of the plunger 8 as shown in FIG. Since it is in the state, the tester is not given the impression that the rising of the plunger 8 is suppressed by the belt 14 or the like, and the weight of the return test device 12 such as the belt 14 or the belt winding device 13 is not the same. Since it is not applied to the head of the plunger 8, the measured time is the return time of the plunger 8 only by the return spring body 9 provided in the cylinder 7.

In the present embodiment, the belt retracting device 13 is used to pull the belt 14 downward, but the belt retracting device 13 is not limited to this, and a wide belt-shaped belt 14 is used. However, a linear object such as a wire or a rope may be used.

[0025]

As described above, according to the present invention, during the return test, the moving time of the plunger only by the return spring body provided in the cylinder can be set without being misunderstood by the examiner. A method of confirming the plunger buffer return operation of the oil buffer, which enables accurate and easy measurement, can be obtained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a hoistway showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of an oil buffer showing an embodiment of the present invention.

FIG. 3 is a front view of an oil buffer according to an embodiment of the present invention with a return test device attached thereto.

FIG. 4 is a perspective view of a head guide portion showing an embodiment of the present invention.

FIG. 5 is a front view showing a state where the plunger of the oil buffer according to the embodiment of the present invention is lowered to the final lower end position.

FIG. 6 is a front view showing a state in which the belt and the head guide member are detached from the plunger head when the plunger of the oil buffer according to the embodiment of the present invention rises from the final lower end position.

[Explanation of symbols]

 1 Hoistway 1a Pit 6 Oil buffer 7 Cylinder 8 Plunger 9 Return spring body 14 Long body (belt) 14a End part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Yagawa 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] 1. A mounting method in which a long body is hung over the head of a plunger of an oil buffer erected on the bottom of the pit of a hoistway, and the end of the long body is attached to a fixed portion other than the plunger. A step, and a lowering step of pulling the elongated body downward to lower the plunger head to a final lower end position after completion of the attaching step, and after completion of the lowering step,
A method for confirming the operation of retrieving a plunger of an oil buffer, which comprises a measuring step of measuring a time required for the plunger head to return to its original position in a state where the elongated body is detached from the plunger head.