JPH0940314A - Buffer action testing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten the general use of a protecting member for protecting a head part of a plunger. SOLUTION: A cable body 15 with one end fixed to a fixing device 11 fixed to a cylinder 2 is connected to a winding device 13, and the winding device 13 is operated to impart holding force to a plunger 1 into a final lower end position. A protecting member 12 disposed to protect a head part of the plunger 1 is so constituted that movable members 23a, 23b are movable in the radial direction of the plunger 1 in relation to a body 20. The protecting member 12 can thereby be applied also to the plunger 1 with a different diameter so as to heighten general use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buffer operation test device for performing an operation test of a buffer arranged in a pit of an elevator.

[0002]

2. Description of the Related Art Generally, an elevator is used, for example, in Japanese Utility Model Publication No.
As described in Japanese Patent Publication No. 9-20678, when a car or a counterweight falls into an hoistway due to an accident, a buffer is provided for catching the car and for safely stopping it with an appropriate deceleration. In the unlikely event that it does not operate normally, it will cause a serious accident,
By law, regular buffer recovery test is obligatory.

FIG. 4 is a sectional view showing a conventional buffer. A cylinder 2 slidably fitted with a plunger 1 is fixed to a pit bottom portion 3 by a bolt 4, and the cylinder 2 is filled with a buffer oil and then returned. The plunger 1 is held by the spring 5 in the state shown in the figure, and the adjusting rod 7 for controlling the orifice 6 formed in the plunger 1 is provided. As the plunger 1 descends, the buffer oil moving from the orifice 6 is removed. A buffering effect is provided while being controlled by the adjusting rod 7. A conventional buffer operation test device for performing such a buffer return operation test is disclosed in, for example, Japanese Patent Publication No.
As described in Japanese Patent No. 58579, a fastening member is fixed to the outer periphery of a lower portion of a cylinder, both ends of a belt wound around a head of a plunger slidable with respect to a cylinder are connected to the fastening member, and A belt winding device was connected in the middle of the structure. The return operation test is
The belt retractor is actuated to lower the plunger to the final lower end position and hold that state.Then, the belt retractor releases the belt, and the return spring measures the time for the cylinder to return to the final upper end position. In general, it was determined that the buffer operation was normal within 90 seconds.

[0004]

However, some buffers have cylinders and plungers of various outer diameters, and when the buffer operation test device is dedicated, the above-mentioned conventional structure is sufficient. , It was not possible to make it a buffer operation test device with versatility. For this reason, when performing a buffer operation test in a building in which a plurality of types of buffers are installed, it is necessary to prepare a plurality of dedicated buffer operation test devices for each. The inventors of the present invention have studied a buffer operation test device having general versatility, and the belt is provided with a binding stitch or the like to form an adjustment allowance, and the fastening metal fitting can be provided with an adjustment allowance to some extent by considering the bolt length. However, a new study was needed regarding the protective member that protects the head of the plunger.

An object of the present invention is to provide a buffer operation test device in which the versatility of the protective member for protecting the head of the plunger is improved.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention has a plunger slidably disposed in a cylinder, and has a plunger head for protecting the plunger head. With the protective member provided, fixing both ends of the cord having the winding device in the middle, and operating the winding device to press the plunger to the final lower position through the cord, In the buffer operation test device that is released, the protective member has a main body arranged on the head of the plunger and a movable member movable in the radial direction of the plunger with respect to the main body. Is characterized by.

[0007]

In the buffer operation test apparatus according to the present invention, the head of the plunger is protected by the protection member having the movable member in the radial direction of the plunger as described above. This can be dealt with only by changing the position of the movable member, and the versatility of the protective member can be enhanced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a pre-test state of a buffer operation test apparatus according to an embodiment of the present invention. The buffer 14 has the same structure as that of the conventional example shown in FIG.
Is slidably fitted to the cylinder 2. As shown in FIG. 1, a buffer operation test device for performing an operation test of the buffer 14 has a substantially C-shaped tightening metal fitting 8a, 8b, which is divided into two parts, which are arranged opposite to each other on the outer periphery of the lower portion of the cylinder 2.
A fixing device 11 that is fixed to the outer circumference of the cylinder 2 by tightening bolts 9 and nuts 10 between the tightening metal fittings 8a and 8b, a protective member 12 attached to the head of the plunger 1 to protect it, and wound in the middle. It is composed of cords 15 and 16 such as belts having the device 13. The cord 15 has an end fitting 15a at one end, and the end fitting 15a is engaged with the support portion 17a of the tightening fitting 8a and is then prevented from coming off by the nut 18a. After holding down the member 12, the winding device 1
The other end is connected to 3. The cord 16 has one end connected to the fixed portion of the winding device 13 and the end fitting 1 provided at the other end.
After engaging 5b with the support portion 17b of the tightening fitting 8b,
The nut 18b keeps it from coming off. In order to provide versatility to the buffers having different diameters and heights of the plunger 1 and the cylinder 2, an adjustment allowance 15b such as a stitch is formed in the intermediate portion of the cord 15, and the fixing device 11 is provided with the bolt 9. This can be dealt with by adjusting the tightening margin of the nut 10 with respect to. Entrainment device 13
As described in detail in Japanese Examined Patent Publication No. 2-58579, for example, the cord 15 is held by a ratchet mechanism or the like while being wound by the reciprocating operation of the movable side 13a, and the cord 15 is then released. Can be released rapidly.

3 and 4 show the protective member 12 described above.
3 is a front view and a plan view of FIG. The protective member 12 includes a main body 20 placed on the head of the plunger 1, a tightening screw 22a engaged in an elliptical hole 21 formed in the main body 20,
It is composed of movable members 23a and 23b each having 22b. A bent portion 24 is provided at both ends of the movable members 23a and 23b to cover and protect the peripheral edge of the head of the plunger 1.
a and 24b. Therefore, the tightening screw 22
When the a and 22b are loosened and moved in the elliptical hole 21, the movable members 23a and 23b move in the elliptical hole 21 of the main body 20 and the facing distance of the bent portions 24a and 24b can be changed. It can handle various diameters.

The operation test by the buffer operation test device is
First, a buffer operation test device is attached to the buffer 14 as shown in FIG. 1, and thereafter, when the movable part 13a of the winding device 13 is operated, the winding device 13 winds the cord 15 and is shown in FIG. As described above, the plunger 1 is lowered to the final lower end position, and the state is protected by a ratchet mechanism (not shown in detail). A reaction force acts on both ends of the cords 15 and 16 by a return spring of the buffer 14, which is received by the fixing device 11 fixed to the cylinder 2. When the winding device 13 is operated to release the cord 15 from the state shown in FIG. 2, the plunger 2 returns to the position shown in FIGS. 1 and 5 by the return spring, and the return time at this time is measured. A buffer operation test can be performed.

When performing an operation test of another buffer provided in the vicinity, the nuts 18a and 18b are loosened to support the support portion 1.
The end fittings 15a and 16a are removed from 7a and 17b, the protection member 12 is also removed, the nut 10 is loosened, the fixing device 11 is removed, and the buffer operation test device is attached to the next buffer in the same manner as described above. Cord 1
The end fittings 15a, 16a of 5, 16 can also be configured by a C ring or the like bridged by a screw member.

As described above, the buffer has various heights and cylinder diameters, but the above-described buffer operation testing device can enhance versatility. That is,
With respect to the height, an adjustment allowance 15b such as a stitch can be formed in the middle of the cord 15 so that the length can be easily adjusted, and also in the fixing device 11, the axial length of the bolt 9 and the nut 1 can be adjusted.
Although the cylinder diameter can be adjusted by adjusting the tightening margin of 0, the protection member 12 also has a main body 20.
On the other hand, the diameter of the plunger 1 can be adapted by making the movable portion slidable in the axial direction.

In the above-described embodiment, the fixing device 11 in which the fastening members 8a and 8b are fixed to the outer peripheral portion of the cylinder 2 has been described, but the fixing device is attached to the cylinder pedestal 25 shown in FIG. The end fittings 15a and 16a of the cords 15 and 16 may be connected to each other.

[0014]

As described above, in the buffer operation test apparatus according to the present invention, the protective member for protecting the head of the plunger is configured to be expandable / contractible in the axial direction, that is, the radial direction of the plunger. However, it is possible to improve versatility by protecting the plunger head with one protection member.

[Brief description of drawings]

FIG. 1 is a front view of a buffer equipped with a buffer operation test device according to an embodiment of the present invention.

FIG. 2 is a front view showing a state before an operation test of the buffer shown in FIG.

FIG. 3 is a front view of a protection member which is a main part of the buffer operation test device shown in FIG.

FIG. 4 is a plan view of the protection member shown in FIG.

FIG. 5 is a cross-sectional view showing a general buffer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger 2 Cylinder 11 Fixing device 12 Protective device 13 Entrainment device 15,16 Cord 20 Main body 23a, 23b Movable member

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

Claims (2)

[Claims] 1. A plunger is slidably arranged in a cylinder, and a protective member is provided on the head of the plunger to protect the head of the plunger, and both ends of a cord-shaped body having a winding device in the middle thereof. In the buffer operation test device which is performed by releasing the winding device while fixing the plunger and pressing the plunger to the final lower position through the cord by operating the winding device, the protective member is A buffer operation test device comprising a main body arranged on the head of the plunger and a movable member movable in the radial direction of the plunger with respect to the main body. 2. The elliptic hole according to claim 1, wherein the main body is formed with an elliptical hole extending in a radial direction of the plunger, and the movable member is guided and moved in the elliptical hole, and at the same time, A buffer operation test device comprising a pair of movable members each having a bending member for protecting an end edge.