JPH0940319A - Buffer operation test device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a buffer operation test device that is versatile and easy to attach and detach. [Structure] A pair of connecting portions 9a and 9b are integrally provided on a cylinder receiving base 8 of a cylinder 2, a cord 11 and a winding device 12 are connected between the connecting portions 9a and 9b, and the winding device 12 is operated. A holding force to the final lower end position is given to the plunger 1, and this is applied to the connecting portions 9a and 9b of the cylinder receiving base 8.
I kept it in.

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
Operate the belt retractor to lower the plunger to the final lower end position and hold it there.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. Had determined that the buffer operation was normal within 90 seconds.

[0004]

However, in the conventional buffer operation test apparatus, the return reaction force of the plunger lowered to the final lower end position is finally received by the fastening metal fitting fixed to the outer periphery of the lower portion of the cylinder. In order to withstand this return reaction force, it is necessary to fasten the tightening metal fitting to the outer periphery of the lower part of the cylinder by tightening it with a screw, so that it is necessary to configure an optimum tightening metal fitting for the cylinder diameter of the target buffer. When such a buffer operation test device is used, the versatility of a buffer having various cylinders with different outer diameters is lost, and each buffer model must be configured as a dedicated device. The work becomes very troublesome.

An object of the present invention is to increase versatility and
It is to provide a buffer operation test device that can be easily attached and detached.

[0006]

In order to achieve the above-mentioned object, the present invention has a plunger slidably arranged in a cylinder and fixes both ends of a cord having a winding device in the middle thereof. In a buffer operation test device which is operated by releasing the winding device while operating the winding device and pressing the plunger to the final lower position through the cord, a pair of connecting portions is connected to the cylinder or the cylinder receiving base. Is provided, and both ends of the cord-like body are fixed to these connecting portions.

[0007]

In the buffer operation test apparatus according to the present invention, a pair of connecting portions is formed on the cylinder or the cylinder receiving base as described above, and a force for holding the pressurized state of the plunger is applied to the connecting portions. It is no longer necessary to firmly fix or remove the fastening metal fittings on the outer peripheral part of the cylinder as in the past, and it is easy to attach and detach other buffer operation test devices that are connected between a pair of connecting parts, increasing versatility. it can.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a sectional view showing a buffer before the buffer operation test device according to the embodiment of the present invention is attached. A cylinder 2 into which a plunger 1 is slidably fitted is fixed to the bottom of a pit by a suitable method, and a pair of connecting portions 9a and 9b are fixed to the cylinder receiving base 8 at positions facing each other. The cylinder 2 is filled with buffer oil, and the return spring 5 holds the plunger 1 in the illustrated state.
Further, it is configured to have an adjusting rod 7 for controlling the orifice 6 formed in the plunger 1, and when the plunger 1 is lowered,
The buffering oil moving from the orifice 6 is controlled by the adjusting rod 7 so as to give a buffering effect.

As shown in FIG. 1, a buffer operation test device for performing such a buffer operation test is provided with a plunger 1 as shown in FIG.
A protective receiving metal fitting 10 is placed on the head of the user, and an end metal fitting 11a provided at one end of a cord 11 such as a belt is connected to the connecting portion 9
It is fixed to a and the middle part of the cord 11 is passed through the receiving metal fitting 10 provided on the head of the plunger 1, and the other end of the cord 11 is connected to the winding device 12.
The fixed portion and the connecting portion 9b are also connected by a cord 13 such as a belt. As described in detail in, for example, Japanese Patent Publication No. 2-58579, the winding device 12 is held by a ratchet mechanism or the like while winding the cord 11 by reciprocating operation of the movable side 12a, and then released. The cord 11 can be released rapidly.

The operation test by the buffer operation test device is
First, the buffer operation test device is attached to the buffer as shown in FIG. 1, and thereafter, when the winding device 12 is operated, the winding device 12 winds the cord 11 and moves the plunger 1 as shown in FIG. The final lower end position is lowered, and the state is maintained by a ratchet mechanism (not shown in detail). A reaction force acts on both ends of the cord 11 by the return springs of the buffer, and this is received by the pair of connecting portions 9 a and 9 b formed on the cylinder support 8. When the winding device 12 is operated to release the cord 11 from the state of FIG. 2, the plunger 1 causes the return spring 5 to move.
1 returns to the positions shown in FIGS. 1 and 3, but the buffer operation test can be performed by measuring the return time at this time.

When conducting an operation test of other buffers provided in the vicinity, the cords 11 and 13 are connected to the connecting portions 9a and 9b.
Remove the end fittings 11a, 13a of the
If either one of b and the end fittings 11a and 13a is used as a hook or a C ring or the like connected by a screw member, this is a relatively simple work.

Further, although the buffer is constructed with various heights and cylinder diameters, the above-mentioned buffer operation testing device can enhance versatility. In other words, with respect to the height, it is possible to form a tie in the middle of the cords 11 and 13 to easily adjust the length, and to connect the connecting portions 9a and 9a.
b does not depend on the diameter of the cylinder 2. The existing buffer does not have the connecting portions 9a and 9b, but a tap may be formed on the cylinder pedestal 8 and the connecting portions 9a and 9b may be screwed into and fixed to the taps.
It is also possible to provide a and 9b.

Although the connecting portions 9a and 9b are fixed to the cylinder receiving base 8 in the above-mentioned embodiment, the connecting portions 9a and 9b may be fixed to other suitable positions of the cylinder 2.

[0014]

As described above, in the buffer operation test apparatus according to the present invention, a pair of connecting portions are integrally provided on the cylinder or the cylinder receiving base, and a force for holding the pressurized state of the plunger is applied to the connecting portions. As a result, it is no longer necessary to attach a tightening bracket to the outer peripheral portion of the cylinder by tightening the screw each time an operation test is performed, and the other buffer operation test device provided between the pair of connecting parts is Can be easily attached to different buffers, and can be easily attached and detached to enhance versatility.

[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 cross-sectional view of the buffer shown in FIG.

FIG. 4 is a cross-sectional view showing a conventional buffer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger 2 Cylinder 8 Cylinder cradle 9a, 9b Connecting part 11,13 Cord 12 Entrainer

Claims (2)

[Claims] 1. A plunger is slidably arranged in a cylinder, both ends of a cord having a winding device in the middle are fixed, and the winding device is operated to move the plunger to the final position through the cord. In a buffer operation test device performed by releasing the winding device while pressurizing to the lower position, a pair of connecting parts is integrally provided on the cylinder, and both ends of the cord are fixed to these connecting parts. Buffer operation test device characterized by. 2. A plunger is slidably arranged in a cylinder having a cylinder pedestal at the bottom, both ends of a cord having a winding device are fixed in the middle, and the winding device is operated to operate the cord. In the buffer operation test device which is performed by releasing the winding device while pressing the plunger to the final lower position via the, the cylinder support is provided with a pair of connecting portions, and the connecting members are connected to the cord-like body. A buffer operation testing device characterized in that both ends of the are fixed.