JPH0225821Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an elevator position detection device for detecting the position of an elevator car.

[Technical background of the invention and its problems]

Generally, a hoisting type elevator has a hoisting machine 3 installed in an upper machine room 2 of a hoistway 1, as shown in FIG.
A car 5 and a counterweight 6 are suspended from both ends of the main rope 4 wound around the hoisting machine sheave, and the car 5 and the counterweight 6 are attached to the main rope 4 by the drive of the hoisting machine 3. It is designed to be raised and lowered relative to each other.

As a position detection device for detecting the vertical position of the elevator car 5, there is one that utilizes a speed governor 7 that rotates in conjunction with the vertical movement of the car 5. In other words, the governor 7 has a rotating shaft 9 supported on a bearing stand 8 provided in the upper machine room 2, a governor sheave 10 attached to one end of the rotating shaft 9, and a governor sheave 10 and a hoistway 1 An endless speed governor rope 12 is provided to extend over the tension wheel 11 provided at the inner lower end pit portion, and the middle of this speed governor rope 12 is connected to the car 5 by a connecting tool 13 to connect the car to the car. 5
The speed governor sheave 10 rotates in conjunction with the rise and fall of the car via the speed governor rope 12, so that the speed of the car 5 is detected by a speed governor mechanism (not shown) provided in the sheave 10. . As shown in the figure, a position detection device 14 is attached to the speed governor 7, and the rotation of the speed governor is used to detect the vertical position of the car.

In such an elevator position detection device 14, the interlocking mechanism such as the rope 12 that moves in synchronization with the lifting and lowering of the car 5 can also be used as the speed governor 7, so it can free up space in the hoistway 1 and also This has the advantage of increasing the degree of freedom in the arrangement of equipment.

By the way, the above-mentioned elevator position detection device 1
4 has conventionally been assembled to the speed governor 7 as shown in FIG. That is, the slit disk 1 is formed on the end surface of the extending shaft portion 9a of the other end side of the rotating shaft 9 of the speed governor 7 (the side opposite to the sheave end from the upper bearing 8a of the bearing stand 8).
5 are mounted concentrically by bolts or the like, and a detector 17 is provided near the periphery of the slit disc 15 via a fixture 16 which is mounted to the bearing stand 8 by bolts or the like. In this configuration, a cover 18 that covers the detector 16 is attached to the bearing stand 8. The detector 17 has a light source 17a and a light receiving element 17b such as a phototransistor, which face each other with a short distance on both sides of the periphery of the slit disk 15. By rotating together with the cylindrical body, a large number of slits formed around the slits output pulses, that is, digital signals. This signal is transmitted to a detection section (not shown) and calculated, thereby detecting the up/down position of the car.

However, the elevator position detection device 14 has the following problems. That is, the lubricant such as grease in the bearing 8a of the bearing stand 8 of the speed governor 7 oozes out and reaches the slit disc 15 along the extended shaft portion 9a, and the slit disc 15
If it adheres to the slit and blocks the slit, or if it adheres to the light source 17a or light receiving element 17b of the detector 17 in the vicinity, it may adversely affect the projection and reception of light, resulting in the inability to detect the position or malfunction. Ta. Additionally, due to the installation position of the detector 17 as well as measures to prevent contamination caused by lubricant, the position detection device 1
4. The overall axial dimension L becomes large. For this reason, there is a risk that the position detection device 14 may hit the wall 2a of the machine room 2, which may be troublesome as the wall 2a must be removed, and the detection device must be transported together with the speed governor 7. - There was a problem that during installation, etc., the position detection device 14 could easily be hit by surrounding walls or equipment, resulting in damage.

[Purpose of invention]

This idea was developed in view of the above circumstances, and it does not cause contamination with lubricants, inability to detect the position, or malfunction, and allows accurate position detection at all times.It also shortens the axial length and is compact. It is an object of the present invention to provide an elevator position detection device that can satisfactorily solve the problem of damage during transportation, installation, etc. and installation space.

[Summary of the idea]

In order to achieve the above object, the elevator position detection device of this invention directs the rotating body provided at the end of the rotating shaft of the governor sheave toward the side opposite to the sheave from the disk portion attached to the end of the rotating shaft and its surroundings. A cylindrical part protrudes and is arranged concentrically with the rotation axis, and a slit is formed in the cylindrical part, and
A detector that outputs a digital signal for car position detection is installed in a direction perpendicular to this cylindrical part, which eliminates the staining of the slit part and the detector by bearing lubricant, allowing for reliable position detection, and making it compact overall. It was designed to make it possible to

[Example of idea]

Embodiments of this invention will be described below with reference to FIGS. 1 to 3. Components in the figure having the same configuration as those shown in FIGS. 5 and 6 above are designated by the same reference numerals to simplify the explanation.

First, in FIG. 1, the rotating shaft 20 that supports the governor sheave 10 of the governor 7A at one end has a very short extending shaft portion 20a at the other end. Position detection device 1 for such speed governor 7A
4A is a rotating body 21 with a slit and a fixing fitting 2
2, a detector 23 consisting of a light source 23a and a light receiving element 23b, a cover 24, and the like.

As shown in FIGS. 2 and 3, the rotating body 21 is formed by bending a single disc into a U-shaped cross section like the lid of a container. It consists of a cylindrical part 21B that is bent and protrudes from the cylindrical part 21B, and a mounting hole 21a is provided in the center of the disc part 21A.
is formed, and a plurality of bolt holes 21b are formed near the periphery of the cylindrical portion 2 on the outer periphery.
Numerous slits 21C that transmit light on the peripheral wall of 1B
are formed at equal intervals in the circumferential direction. This rotating body 21 has a cylindrical portion 2 as shown in FIG.
1B faces the opposite side of the sheave, insert the central mounting hole 21a of the disc portion 21A into the extending shaft portion 20 of the rotating shaft 20.
It is fitted into the small protrusion 20b on the end surface a and aligned, and the disk portion 21A is held between the end surface of the extending shaft portion 20b by a restraining plate 25 made of an annular iron plate or the like to prevent deformation. By tightening and fixing with a plurality of bolts 26, the cylindrical portion 21B is attached so as to rotate concentrically with the disk portion 21A as the rotation shaft 20 rotates.

On the other hand, the fixing fitting 22 has a substantially L-shape,
By fixing the tip of this lower piece 22a to the bearing stand 8 with bolts 27, the rising U-shaped portion 22b is moved from this tip side to the inner and outer peripheral positions so as to sandwich the lower side of the peripheral wall of the outer cylindrical portion 21B of the rotating body 21. This fixing metal fitting 22 is installed in a straddling state.
A light source 23a of the detector 23 and a light receiving element 23b such as a phototransistor are mounted and supported so as to be embedded in the upper and lower opposed parts of the rising U-shaped part 22b. They face each other in a direction orthogonal to the circumferential wall, and output pulses, that is, digital signals, by intermittent light depending on the presence or absence of a large number of slits in the circumferential wall as the cylindrical portion 21B rotates. Note that this signal is transmitted to a detection section (not shown) via an electric wire or an optical fiber, and is used for calculations to detect the elevator position of the car.

The cover 24 is press-molded from an iron plate or the like, and has a cap shape with one end and a portion of the lower side open.The lower portion of the cover 24 is fitted into the fixing fitting 22, and the open end is fitted with the bearing. By fitting into the upper bearing part of the stand 8 and fastening with a bolt 28, the rotating body 21 and the detector 23 are housed inside and protected in a hermetically sealed manner.

With the above configuration, the rotating body 21 attached to the end of the rotating shaft has a U-shaped cross section, and the cylindrical portion 21B is bent and protruded from the outer periphery of the disk portion 21A toward the side opposite to the sheave. ni slit 21
Since lubricant such as grease in the bearing 8a oozes out and is transmitted to the disc part 21A of the rotating body 21 along the extended shaft part 20a of the rotating shaft 20, the disc part The slit 21 of the cylindrical portion 21B is not transmitted to the cylindrical portion 21B which is shaken off and bent at the outer peripheral edge of the cylindrical portion 21A.
c is prevented from being blocked by the lubricant, and the lubricant is also prevented from adhering to the light source 23a and light receiving element 23b of the position detector 23, which are disposed facing each other in a direction orthogonal to the vicinity of the cylindrical portion 21B. It disappears. As a result, the projection and reception of light can be performed reliably, and accurate position detection can be performed at all times without malfunction.

Further, as described above, the slit 21c of the rotating body 21
and the light source 23a and light receiving element 23 of the position detector 23
Since the lubricant is no longer attached to b, the rotating shaft 20
The extending shaft portion 20a of the cylindrical portion 21B can be made significantly shorter than the conventional one, and the position detector 23 can be disposed in a direction perpendicular to the peripheral wall of the cylindrical portion 21B, which is arranged concentrically with the rotation axis. , cylindrical part 21B
A light source 23a and a light receiving element 23 are provided on the inner circumferential side and the outer circumferential side of the
b can be arranged facing each other, the axial dimension of the entire position detecting device 14A can be shortened to less than half that of the conventional one as shown by , and compactness can be achieved. With this, the wall 2a of the machine room 2
This eliminates the inconvenience of having to deal with damage, frees up space, and reduces the risk of damage during transportation, installation, etc.

Next, FIG. 4 shows another embodiment of this invention, in which a disc-shaped lubricant swinging plate 30 is superimposed on the disc part 21A of the rotating body 21, and the extending shaft part 20a of the rotating shaft 20 is The shake-off plate 30 is attached concentrically to the end, and has a larger diameter than the outer diameter of the cylindrical portion 21B of the rotating body 21, and shakes off the lubricant oozing from the bearing 8a to the cylinder of the rotating body. This is to prevent any movement toward the section 21B side.
With this, an even higher effect than the above embodiment can be obtained. Note that the swing-off plate 30 may be formed so as to protrude integrally from the disc portion 21A of the rotating body 21.

[Effect of idea]

As described above, this invention includes a rotating body provided at the end of the rotating shaft of the governor sheave, a disk portion attached to the end of the rotating shaft, and a disk portion protruding from the periphery of the rotating body toward the side opposite to the sheave so that the rotating body is concentric with the rotating shaft. A slit is formed in this cylindrical part, and a detector that outputs a digital signal for detecting the car position is installed in a direction perpendicular to this cylindrical part, so that the lubricant seeping out from the bearing can be prevented. This eliminates contamination of the slit part and the detector due to this, making it possible to always accurately detect the position without malfunction, and the length in the axial direction can be shortened, making it compact and easy to transport and install. Problems of damage and installation space can be better solved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention, Fig. 2 is a perspective view of only the rotating body with slits shown in Fig. 1, Fig. 3 is a partially enlarged sectional view of the rotating body, and Fig. 4 is FIG. 5 is a sectional view showing another embodiment of this invention, FIG. 5 is a schematic diagram of the entire elevator structure showing a conventional example, and FIG. 6 is a sectional view of the conventional position detection device. 1...Elevator car, 7A...Governor, 8...
...Bearing stand, 10...Governor sheave, 14A
...Position detection device, 20...Rotary axis, 20a...
Extending shaft portion, 21...Rotating body, 21A...Disc portion,
21B...Cylindrical part, 21c...Slit, 22...
...Fixing bracket, 23...Position detector, 23a...Light source, 23b...Light receiving element, 24...Cover, 30
...Lubricant swinging plate part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rotating body with a slit is provided at the end of the rotating shaft of the governor sheave that rotates in conjunction with the elevation of the elevator car, and as the slit moves as the rotating body rotates, the car In an elevator position detection device that is provided with a detector that outputs a digital signal for position detection, the rotating body has a disk portion attached to the end of the rotating shaft and a disk portion protruding from the periphery toward the opposite side of the sheave to form a concentric circle with the rotating shaft. What is claimed is: 1. An elevator position detection device comprising: a cylindrical portion disposed at a cylindrical portion; a slit is formed in the cylindrical portion; and the detector is disposed in a direction perpendicular to the cylindrical portion. (2) The elevator position according to claim 1 of the utility model registration claim, characterized in that the rotating body has a lubricant swinging plate part integrally or separately with a diameter larger than the outer diameter of the cylindrical part on the disc part side. Detection device.