JPH0915109A - Method for confirming reset operation of plunger in oil buffer - Google Patents

Abstract

PURPOSE: To obtain a method for confirming the reset operation of plunger in oil buffer in which the moving time only of a reset spring body, disposed in the cylinder of plunger, can be measured easily and accurately without causing any misjudge of the inspector. CONSTITUTION: After the head part of a plunger 8 is lowered to the final lower end position by pulling a long material 14 downward, intermediate part of the long material 14 is separated by means of a releasing mechanism 22 mounted thereon. The long material 14 and a belt guide member 18 are removed from the head part of the plunger 8, and the time required for resetting the plunger is measured under that state.

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 standing 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 latches provided on the outer circumference of a cylinder of the oil buffer and these latches are provided. A belt, one end of which is locked to one of the tools, 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 retractor, and the other of the hooks. Using an oil buffer return test device that has one end locked to the object and the other end connected to the belt retractor, the belt is retracted into the belt retractor to finalize the plunger. After lowering to the lower end position, rewind the belt wound in the belt retractor so that the plunger returns to the original state, that is, the predetermined upper end position, and the final lower position of the plunger is lowered. Plunger return operation confirmation method of the oil buffer so as to measure the travel time to a predetermined upper position from the position was known.

[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, belt hoisting device, and 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 portion 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 lengthening step after the lowering step. Measure the tension release step of releasing the tension by the release mechanism provided on the scale, and the time until the plunger head returns to the original position with the long body removed from the plunger head. It is achieved by adopting a configuration including a measurement step of

[0006]

According to the present invention, after the plunger head is lowered to the final lower end position, the releasing mechanism separates the long body until the plunger head returns to its original position. Since the long body is not suspended on the plunger head, there is no misunderstanding that the long body holds the rise of the plunger within the time required for the plunger to pass the test. The time required for the plunger head to return from the final lower end position to the original position can be set as the plunger return time only by the return spring body provided in the cylinder.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a car 2 is provided in a hoistway 1 such as an elevator provided in a building or the like so as to be vertically guided by two guide rails 3 and 3a. The guide rails 3 and 3a are used for the hoistway 1.
A plurality of rail brackets 4 are used to fix the inner wall of the. 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
As shown in FIG. 3, the belt winding device 13 and the one end 14a are attached to a fixed portion other than the plunger 8, and
A long body (hereinafter referred to as a belt) made up of a nylon belt, the intermediate portion of which is hooked on a cushioning member 11 provided on the upper surface of the plunger 8, and the other end 14b of which is attached to the belt retracting device 13 so as to be retractable. 14) and one end 15
a is attached to a fixed portion other than the plunger 8, and the other end 15b has at least a nylon connection body 15 connected to the belt retractor 13. In this embodiment, the fixed portion other than the plunger 8 is the cylinder 7, and the outer peripheral wall 7a of the cylinder 7 is provided with hooks 16, 16a.
The end 14a of the belt 14 and the end 15a of the connecting body 15 are detachably attached to the hooks 16 and 16a using the delta ring fittings 17 and 17a. 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. Also, one end 14 a of the belt 14 and the connecting body 1
When the one end 15a of the belt 5 is attached to the hooks 16 and 16a which are fixed parts other than the plunger 8, the belt winding device 13 is positioned outside the cylinder 7 as shown in FIG. The length of the connecting body 15 is set. The belt 1 is attached to the intermediate portions 14c and 14d of the belt 14.
An iron plate release mechanism 22 for releasing the tension of No. 4 is provided. The upper end 22a of the release mechanism 22 is the middle 1 of the belt 14.
4c and the connecting ring 25. The lower end 22b of the release mechanism 22 is connected to the intermediate 14d of the belt 14 by a connecting ring 26.

A specific example of the release mechanism 22 is shown in FIGS.
And FIG. The upper end 22a of the release mechanism 22 of FIG. 4 is connected by the connecting ring 25 of the intermediate 14c of the belt 14, and the lower end 22b of the release mechanism 22 is connected by the intermediate 14d of the belt 14 by a connecting ring 26. The release mechanism 22 and the release lever 23 are mounted so as to be driven by a connecting pin 24. Therefore, by operating the release mechanism 22 together with the release lever 23 with one hand, the upper end of the release lever 23 operates and the connecting ring 25 is disengaged from the upper end 22a of the release mechanism 22.

A belt guide member 18 is mounted on the cushioning member 11 of the plunger 8 as shown in FIG. The belt guide member 18 is provided so that the belt 14 can be wound into the belt winding device 13 without being displaced from the upper surface of the cushioning member 11 of the plunger 8. First hanging pieces 19a, 19b provided on both sides of the first flat plate 19 and engageable with the outer periphery of the upper end of the plunger 8, and provided on the side portion of the first flat plate 19 and of the belt 14. A head guide A and a second flat plate 20 made of a steel plate, which are formed by rising portions 19c and 19b for preventing falling, and are provided on both sides of the second flat plate 20 and engage with the outer periphery of the upper end of the plunger 8. It has a head guide support B made of a steel plate composed of possible second hanging parts 20a, 20b. The head guide support B is located below the head guide A and the head guide support is provided. Are the B and head guide member A rotatable become configured around the shaft 21.

When performing a return test of the oil buffer 6 on 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 flammable 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, 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 the belt winding device 13
The belt 8 is wound up 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.
4 is wound around the drum 13b, and the plunger 8 is lowered to the end of the plunger stroke, as shown in FIG. By disengaging from 22, the engagement with the belt 14 is released as shown in FIG.
As shown in FIG. 9, 4 is removed 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 60 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 this embodiment, the belt retractor 13 is used to pull the belt 14 downward, but the belt retractor 13 is not limited to this, and the belt 14 is a wide belt. However, a linear object such as a wire or a rope may be used.

[0026]

As described above, according to the present invention, the long body and the belt guide member are removed from the head of the plunger by separating the middle of the long body by the release mechanism provided in the long body. Since it can be kept in a closed state, the tester does not misunderstand during the return test, and the travel time of the plunger only by the return spring body provided in the cylinder can be accurately and easily measured. The method of confirming the oil buffer plunger return operation that made it possible is obtained.

[Brief description of the 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 an enlarged view of a main part of a release mechanism showing an embodiment of the present invention.

5 is a vertical cross-sectional view of a main part of the release mechanism of FIG. 4 showing an embodiment of the present invention.

FIG. 6 is a perspective view of a head guide portion showing an embodiment of the present invention.

FIG. 7 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. 8 is a longitudinal sectional view of an essential part of the releasing mechanism of FIG. 4 in a released state, showing an embodiment of the present invention.

FIG. 9 is a front view showing a state in which the belt and the belt guide member are removed 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.

[Explanation of symbols]

 1 Hoistway 1a Pit 6 Oil buffer 7 Cylinder 8 Plunger 9 Return spring body 14 Long body (belt) 14a End 18 Belt guide member 22 Release mechanism 23 Release lever 25, 26 Connection ring

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuji Koizumi 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Within Hitachi Building System Service Co., Ltd. (72) Inventor Tatsuya Kurihara 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Service

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 descending step of lowering the plunger head to the final lower end position by pulling the elongated body downward after completion of the attaching step, and after completion of the descending step,
Tension release step of releasing tension by a release mechanism provided on the elongated body, and time until the plunger head returns to the original position in a state where the elongated body is removed from the plunger head. A method of confirming the operation of retrieving the plunger of the oil buffer, which comprises a measuring step for measuring