JPH11236176A - Mounting structure of elevator bracket on hoistway wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of an elevator bracket on a hoistway wall which is excellent in durability, small in secular change, and capable of consisting of inexpensive material, and capable of effectively damping the vibration propagating to the hoistway wall. SOLUTION: Spacers 5, 5 forming a space between a bracket 2 and a hoistway wall 1, and a bolt at a center part of the spacer 5 are provided, and the installation interval (d) of the spacers 5, 5 is set to be not less than one half wavelength of the bending wave having the frequency of the vibration which propagates in the bracket 2 and is desired to be insulated, and the vibration propagation to the hoistway wall 1 can be damped. Because the mounting structure is formed of only steel, it is inexpensive and durable, and easy in manufacture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an elevator bracket to a hoistway wall for preventing vibration of an elevator guide rail or hydraulic jack from propagating to the hoistway wall.

[0002]

2. Description of the Related Art FIG. 11 is a side view showing the entire structure of a conventional rope type elevator disclosed in Japanese Utility Model Publication No. 62-6063, and FIG. 12 is a sectional view taken along line BB of FIG. In the figure, 21 is a machine room, 22 is a hoisting machine, 23 is a solaceive, and 24 is a main rope. An elevator car (not shown) is provided at one end, and a counterweight 25 is provided at the other end. 26 is a hoistway wall forming a hoistway 27;
Is connected to the hoistway wall 26 by the fastening member 28a.
The rail bracket is fixed to the rail bracket. Reference numeral 29 denotes a guide rail supported by a rail bracket 28 and provided vertically in the hoistway 27, and guides a guide shoe 30 provided on the counterweight 25 up and down. This guide rail 29 is made of a plate-shaped vibration isolator 29a and two steel plates 29.
b, formed by bending a material that has been bonded and polymerized into a substantially Ω-shaped cross section.
To the rail bracket 28. The elevator car (not shown) is also provided with a rail bracket, a guide rail, and a guide shoe (not shown) so as to be able to move up and down similarly to the counterweight 25.

Next, the operation will be described. Counterweight 2
5 and an elevator car (not shown)
0, and the vibration propagates to the hoistway wall 26 via the guide rail 29 and the rail bracket 28. that time,
Since a part of the vibration is absorbed by the vibration isolator 29a of the guide rail 29, the amount of vibration propagating to the hoistway wall 26 is attenuated.

Another conventional example will be described with reference to FIG. FIG. 13 is a side view showing the entire structure of a conventional hydraulic elevator disclosed in Japanese Patent Application Laid-Open No. 58-82979, and FIG. 14 is a sectional view taken along the line CC of FIG. In the figure, 41 is a hoistway wall, 42 is a hydraulic jack, 43 is a plunger, 44 is a pulley, 45 is a rope, 46 is an elevator car, 47 is a guide rail, 48 is a sliding part, and 49 is a hydraulic jack 42 with a bracket 50. , And is fixed to the bracket 50 by a nut 51. Reference numeral 52 denotes an anchor bolt, and 53 denotes an anti-vibration rubber wound around the hydraulic jack 42.

Next, the operation will be described. When the hydraulic jack 42 is operated to raise and lower the elevator car 46, vibration of the hydraulic jack 42 itself and the hydraulic jack 4
The vibration of the sliding portion 48 and the vibration of the pulley 44 transmitted to the shaft 2 propagate to the shaft wall 41 via the bracket 50.
At that time, a part of the vibration is absorbed by the vibration isolating rubber 53, so that the amount of vibration propagating to the shaft wall 41 is attenuated.

[0006]

Since the conventional structure for mounting the elevator bracket to the hoistway wall is constructed as described above, the expensive vibration damping material 29a and the vibration damping rubber 53 must be used. In addition, they have problems such as low durability and large aging, requiring maintenance costs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be made of only inexpensive constituent materials having high durability, small aging, and effective use of the amount of vibration transmitted to the hoistway wall. It is an object of the present invention to obtain a structure for mounting an elevator bracket to a hoistway wall, which can be attenuated in a short time.

[0008]

A structure for mounting an elevator bracket to a hoistway wall according to the present invention comprises a plurality of gap forming means for forming a gap between the bracket and the hoistway wall; A fixing means for fixing the bracket and the hoistway wall at or near the center is provided.

A structure for mounting an elevator bracket to a hoistway wall according to the present invention includes a plurality of brackets connected in series by fixing means and a plurality of gap forming means for forming a gap between the brackets. Things.

[0010] In the mounting structure of the elevator bracket to the hoistway wall according to the present invention, the gap forming means is formed by projecting a part of the bracket or a part of the hoistway wall.

In the mounting structure of the elevator bracket to the hoistway wall according to the present invention, the interval of the air gap forming means is set to be equal to or longer than a half wavelength of a bending wave at a frequency at which vibration propagating in the bracket is to be cut off. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a horizontal sectional view showing a mounting structure of an elevator bracket to a hoistway wall according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing a mounting structure of the elevator bracket to a hoistway wall. FIG. 1 is the same as FIG.
A-A section is shown. 1 and 2,
Reference numeral 1 denotes a hoistway wall in which an anchor nut (fixing means) (not shown) for mounting a bolt (fixing means) 4 is embedded. Reference numeral 2 denotes a bracket for supporting and fixing the guide rail 3, and is formed of so-called H steel made of steel. 2a is a through hole for inserting the bolt 4, 3a is a female screw portion to be screwed with the bolt 4, 5 is a spacer (gap forming means) for providing a predetermined gap between the hoistway wall 1 and the bracket 2. And a metal nut screwed with the bolt 4 is used. A guide shoe 6 is provided on an elevator car (not shown) and slides on the guide rail 3.
In addition, d is an installation interval of the spacers 5 and 5 (interval of the gap forming means), and is set to be equal to or longer than a half wavelength of a bending wave related to a frequency at which vibration propagating in the bracket 2 is to be cut off for the reason described later. .

Next, the operation will be described. When the elevator car (not shown) moves up and down, the guide shoe 6 slides on the guide rail 3, and the vibration of the bracket 2 generated thereby is transmitted to the hoistway wall 1. As the vibration transmission path, only the spacer 5 and the bolt 4 that are in contact with the hoistway wall 1 are used. That is, the spacer 5 is attached to the shaft wall 1.
When the hoistway wall 1 and the bracket 2 are brought into surface contact (not shown) without being interposed between the shaft 2 and the bracket 2, the contact area is the area of one entire surface of the bracket 2, In the case of the present invention shown in FIG. 1, the contact area is the area that the front and back surfaces of the spacer 5 have,
Is much smaller than the case without the intervening.

FIG. 3 and FIG. 4 show the results of comparative experiments on the amount of vibration transmission in these cases. Here, FIG. 3 is a graph showing the amount of vibration transmission when the bracket is directly attached to the hoistway wall without using the spacer, and FIG. 4 is the amount of vibration transmission when the bracket is provided on the hoistway wall via the spacer. FIG. That is, the vibration transmission amount is compared by measuring the vibration of the hoistway wall 1 and the vibration of the bracket 2 when the bracket 2 is vibrated. 3 and 4, thick lines in the graph show the power spectrum density of the acceleration of the bracket 2, and thin lines show the power spectrum density of the acceleration of the hoistway wall 1. As can be seen from FIG. 3, when the bracket is directly attached to the hoistway wall without using the spacer (not shown), the dynamic rigidity of the joint portion of the bracket 2 is high, and the exciting force of the vibration is directly applied to the hoistway. It will be transmitted to the wall 1. On the other hand, as can be seen from FIG. 4, when a predetermined gap is provided between the bracket 2 and the hoistway wall 1 via the spacer 5, the dynamic rigidity of the bracket 2 decreases, and further, for the reasons described later. When the installation interval d of the spacer 5 is set to be equal to or more than half the wavelength of the bending wave propagating in the bracket 2, the rigidity of the vibration transmitting unit is reduced, and the mass of the bracket 2 and the mass-spring vibration isolation system at the joint are reduced. Holds, and the propagation amount of the vibration rapidly attenuates from a certain critical frequency. Therefore, the dynamic rigidity of the bracket 2 at the joint portion of the present invention is much smaller than when the bracket 2 is directly attached to the hoistway wall 1, and the vibration is prevented, and the amount of vibration transmitted from a certain frequency is reduced.

Next, the installation interval d of the spacer 5 will be described in more detail. FIG. 5 is a graph showing the relationship between the installation interval d of the spacer and the vibration transmissibility. That is, in the vibration test results of the bracket 2 when the installation interval d was changed under the condition that the thickness of the bracket 2 was 6 mm and the vibration frequency was 500 Hz, the ratio of the acceleration of the bracket 2 to the acceleration of the hoistway wall 1 was obtained. It is shown. In this vibration experiment, a washer was used as the spacer 5. As shown in FIG. 5, when the installation interval d of the spacer 5 becomes 180 mm or more, the vibration transmissibility becomes the specified value of 0.1.
It turns out that it becomes smaller than 1. Therefore, under such conditions, the vibration transmission amount can be attenuated by setting the installation interval d of the spacer 5 to be 180 mm or more.

FIG. 6 is a graph showing the relationship between the value obtained by dividing the installation interval d of the spacer by the half wavelength of the bending wave propagating in the bracket and the vibration transmissibility. That is, the installation interval d is made dimensionless by dividing it by the half wavelength of the bending wave relating to the frequency at which the vibration propagating in the bracket 2 is to be cut off, so that the vibration transmissibility can be evaluated regardless of the frequency or the dimensions of the bracket 2. It was done. As can be seen from FIG. 6, by setting the installation interval d of the spacer 5 to be equal to or more than half the wavelength of the bending wave related to the frequency at which the vibration propagating in the bracket 2 is to be cut off, the vibration transmissibility can be extremely efficiently attenuated. Can be.

As described above, according to the first embodiment, the bracket 2 is provided on the hoistway wall 1 via the spacer 5, and the installation interval d of the spacer 5 is
By setting the length to be equal to or more than a half wavelength of the bending wave propagating in the inside, an effect of extremely efficiently attenuating the amount of vibration transmitted to the shaft wall 1 can be obtained. In addition, since it can be configured using only a steel material, the effects of being inexpensive, durable, and easy to manufacture can be obtained.

In the first embodiment, the hoistway wall 1
Although the anchor nut and the bolt 4 (not shown) are used as the fixing means of the bracket 2 to the bracket and the nut is used as the spacer 5, the present invention is not limited to this, and other well-known and commonly used fixing means may be applied. Good. Further, the shapes of the spacer 5 and the bracket 2 are not limited to those described above.

In the first embodiment, an example of application to the guide rail 3 of the rope type elevator has been described.
The same can be applied to a hydraulic jack of a hydraulic elevator.

Further, the description has been made assuming that the spacer 5 is used to provide a predetermined gap between the bracket 2 and the hoistway wall 1, but as shown in FIG. Protrusion on the side (gap forming means)
The same effect can be expected even if 2b is formed and connected at this portion. Here, FIG. 7 is a horizontal sectional view showing a structure for mounting an elevator bracket to a hoistway wall using a bracket having a projection. The same effect can be expected even if such a projection is formed on the hoistway wall 1.

Furthermore, although the description has been made assuming that the bolt 4 is provided at the center of the spacer 5, the invention is not limited to this. As shown in FIG. 8, the bolt 4 is provided at the periphery of the spacer 5, and the spacer 5 is moved up and down with the bracket 2. It may be provided so as to be sandwiched between the road wall 1 and the same effect can be expected in this case. Here, FIG. 8 is a horizontal cross-sectional view showing a structure for mounting an elevator bracket provided with bolts on the periphery of a spacer to a hoistway wall. Further, bolts 4 may be provided around the protrusion 2b shown in FIG. 7 in the same manner as described above.

Embodiment 2 FIG. In the second embodiment, two brackets 2 in the first embodiment are connected in series via a spacer 5. FIG. 9 is a horizontal sectional view showing a structure for attaching an elevator bracket to a hoistway wall according to Embodiment 2 of the present invention. The same members as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In FIG. 9, reference numeral 7 denotes a connecting bolt (fixing means) for connecting the brackets 2, 2;
Is a nut (fixing means) to be screwed with the connection bolt 7, 9 is a first bracket connection portion, and 10 is a second bracket connection portion.

Next, the operation will be described. When the guide shoe 6 slides on the guide rail 3 by elevating and lowering an elevator car (not shown), the vibration of the first-stage bracket connection portion 9 caused by this moves through the second-stage bracket connection portion 10. It is transmitted to the hoistway wall 1. The vibration transmission path from the first-stage bracket connection portion 9 to the second-stage bracket connection portion 10 is only a fastening portion with the connection bolt 7, the spacer 5, and the nut 8. That is, the contact area of each member at the fastening portion is much smaller than the case where the spacer 5 is not interposed, and the dynamic rigidity of the connecting portions of the brackets 2 is reduced. The vibration from 9 to the second stage bracket connection 10 is attenuated. This vibration damping effect can be considered substantially the same as the case shown in FIG. 4 of the first embodiment. Further, as described in the first embodiment, the damped vibration is generated by the second-stage bracket connection portion 1.
0 further attenuates during transmission to the hoistway wall 1.

The vibration damping effect will be described with reference to FIG. Here, FIG. 10 is a graph showing a comparison of the amount of vibration transmission when one bracket is provided and when two brackets are provided in series via a spacer. This means that the critical frequency of the first vibration isolation system at the first stage bracket connection 9 is 1
The critical frequency of the second vibration isolating system in the second bracket connection portion 10 is set to 100 Hz, and the vibration transmissibility of each vibration isolating system is calculated and compared. In FIG. 10, the broken line indicates the vibration transmissibility in the case of one-stage vibration isolation, and the solid line indicates the vibration transmissivity in the case of two-stage vibration isolation. From FIG. 10, it can be seen that the vibration transmission amount can be further attenuated by connecting the double vibration isolation systems in series.

As described above, according to the second embodiment, an effect of further attenuating the amount of vibration transmission can be obtained by connecting the double vibration isolation systems in series.

In the second embodiment, two brackets 2 are connected in series via the spacer 5. However, the present invention is not limited to this, and three or more brackets 2 are connected in series via the spacer 5. You may connect and comprise. In this case, a larger damping effect can be expected.

[0027]

As described above, according to the present invention, a plurality of gap forming means for forming a gap between the bracket and the hoistway wall, and the bracket at or near the center of the gap forming means. And the fixing means for fixing the hoistway wall to the hoistway wall. Therefore, the vibration transmission amount to the hoistway wall can be attenuated. In addition, since it can be configured using only a steel material, there is an effect that it is inexpensive, durable, and easy to manufacture.

According to the present invention, the plurality of brackets are connected in series by the fixing means, and the plurality of brackets are provided with a plurality of gap forming means for forming a gap between the brackets. There is an effect that the vibration transmission amount can be further attenuated.

According to the present invention, since the gap forming means is formed by projecting a part of the bracket or a part of the hoistway wall, the number of parts can be reduced.

According to the present invention, the interval between the gap forming means is set to be equal to or more than half the wavelength of the bending wave relating to the frequency at which the vibration propagating in the bracket is to be cut off. There is an effect that the attenuation can be performed very efficiently.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a structure for attaching an elevator bracket to a hoistway wall according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a structure for attaching an elevator bracket to a hoistway wall.

FIG. 3 is a graph showing a vibration transmission amount when a bracket is directly attached to a hoistway wall without using a spacer.

FIG. 4 is a graph showing the amount of vibration transmitted when a bracket is provided on a hoistway wall via a spacer.

FIG. 5 is a graph showing a relationship between a spacer installation interval d and a vibration transmissibility;

FIG. 6 is a graph showing a relationship between a vibration interval and a value obtained by dividing a spacer installation interval d by a half wavelength of a bending wave propagating in a bracket.

FIG. 7 is a horizontal sectional view showing a structure for mounting an elevator bracket to a shaft wall using a bracket having a projection.

FIG. 8 is a horizontal sectional view showing a structure for mounting an elevator bracket provided with bolts on a periphery of a spacer to a hoistway wall.

FIG. 9 is a horizontal sectional view showing a structure for attaching an elevator bracket to a hoistway wall according to Embodiment 2 of the present invention.

FIG. 10 is a graph showing a comparison of a vibration transmission amount between a case where one bracket is provided and a case where two brackets are provided in series via a spacer.

FIG. 11 is a side view showing the overall structure of a conventional rope type elevator disclosed in Japanese Utility Model Publication No. 62-6063.

FIG. 12 is a sectional view taken along line BB of FIG. 11;

FIG. 13 is a side view showing the entire structure of a conventional hydraulic elevator disclosed in Japanese Patent Application Laid-Open No. 58-82979.

14 is a sectional view taken along the line CC of FIG.

[Explanation of symbols]

1 hoistway wall, 2 bracket, 2b projection (gap forming means), 3 guide rail, 4 bolt (fixing means), 5 spacer (gap forming means), 7 connecting bolt (fixing means), 8 nut (fixing means) , D Installation intervals (intervals of gap forming means).

Claims (4)

[Claims] 1. A mounting structure of an elevator bracket to a hoistway wall for fixing a guide rail for guiding an elevator car up and down or a hydraulic jack for elevating the elevator car to the hoistway wall via a bracket, wherein the bracket and the elevating A plurality of gap forming means for forming a gap between the road wall and a fixing means for fixing the bracket and the hoistway wall at or near the center of the gap forming means. Structure for mounting the elevator bracket to the hoistway wall. 2. The elevator bracket according to claim 1, further comprising a plurality of brackets connected in series by fixing means, and a plurality of gap forming means for forming a gap between the brackets. Mounting structure to road wall. 3. The mounting of the elevator bracket to the hoistway wall according to claim 1, wherein the gap forming means is formed by projecting a part of the bracket or a part of the hoistway wall. Construction. 4. The apparatus according to claim 1, wherein an interval between the gap forming means is set to be equal to or longer than a half wavelength of a bending wave corresponding to a frequency at which vibration propagating in the bracket is to be cut off.
The mounting structure of the elevator bracket according to any one of the above, to a hoistway wall.