JP2001247278A - Car frame for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the riding comfort of a car by providing a vibration control device between a lower beam of a car frame and an under-car sheave supporting table. SOLUTION: This car frame can dispenses with a supporting member mounted on a car frame lower beam for supporting the under-car sheave supporting table in a conventional car frame, lower buffer mounting plates 12 are placed on an upper face of the under-car sheave supporting table 9 provided with the under-car sheaves 4 at both ends, upper buffer mounting plates 11 tare mounted on a lower face side of the vibration control device mounting plate 10 mounted on a lower part of the car frame lower beam 3, and a buffer 13 is inserted between these upper and lower buffer mounting plates for damping the vibration from the under-car sheaves between the under-car sheave supporting table and the car frame lower beam, for preventing the vibration from being transmitted to the car frame lower beam and the car 6 supported by the car frame lower beam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car frame of a lift-type elevator in which a car lower sheave support provided with a car lower sheave at both ends is provided on a lower beam of a car frame supporting a car.

[0002]

2. Description of the Related Art The structure of a conventional lift-type elevator is as follows.
It was as shown in FIG. 7 and FIG. In this conventional elevator, as shown in FIG. 7, guide rails 1 are vertically mounted on both side walls of a hoistway R, and a car frame 2 supporting a car 6 is arranged between the guide rails 1 on both sides. The guide rail 1 guides the car frame 2 up and down. The lower car sheave 4 is disposed below the lower car frame lower beam 3 of the car frame 2 via the lower car sheave support 9,
A lifting rope 5 is wound around the lower sheave 4 of the car. Therefore, by raising or lowering the lifting rope 5, the lower car sheave 4 can be raised and lowered, and the car frame 2 can also be raised and lowered via the lower car sheave support 9.

FIG. 8 is a bottom view showing details of a mounting portion of the lower car sheave 4. The car frame lower beam 3 is provided with a shock absorber receiver 7, a support member 8 is attached at a position not interfering with the shock absorber receiver 7, and a lower car sheave support stand 9 is provided below the support member 8.
Is installed. The above-mentioned car sheave 4 is attached to the car sheave support 9.

[0004]

However, the structure of the conventional elevator car frame has the following problems. Generally, a lift-type elevator is employed when a relatively low speed and a sufficient top clearance of a hoistway cannot be ensured as in a hydraulic elevator. However, there is also a limit to the depth of the elevator pit, and if at least one of the upper and lower sides of the support member 8 is provided with a vibration isolator, the height dimension is increased by that amount, making it impossible to cope with the limited pit depth. . For this reason, the conventional lift-type elevator is not provided with a vibration isolator for the sheave under the car.
For this purpose, the lower car sheave 4 is moved up and down by hoisting or rewinding it with the rope 5, thereby raising and lowering the car 6 via the lower car sheave support 9 and the lower car frame beam 3. When the lower sheave 4 vibrates, the vibration is transmitted almost directly to the lower beam 3 of the car frame, and there is a problem that the riding comfort of the car 6 supported by the lower beam 3 of the car frame deteriorates. In addition, there was a problem that it was not possible to cope with a high-speed elevator due to large vibration.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and has a vibration isolator between a lower beam of a car frame and a lower sheave support of a car without making an elevator pit deep. It is an object of the present invention to provide an elevator car frame that can improve the riding comfort of the car and can cope with a high-speed elevator.

[0006]

In the elevator car frame according to the first aspect of the present invention, a cushioning material mounting plate is attached to a car lower sheave support base having car lower sheaves mounted on both ends to support the lower part of the car. A vibration isolator mounting plate is attached to the lower beam of the car frame, and a cushion mounting plate on the lower beam of the car frame is provided on a portion of the vibration isolator mounting plate opposite to the buffer mounting plate on the lower sheave support of the car. , And a car sheave support is attached to a car frame lower beam by interposing a cushioning material between these upper and lower cushioning material mounting plates.

In the elevator car frame according to the first aspect of the present invention, the support member attached to the lower beam of the car frame to support the lower car sheave support in the conventional example is eliminated, and the buffer on the side of the lower car sheave support is eliminated. The car lower sheave support is attached to the car frame lower beam by interposing a cushioning material between the material mounting plate and the cushioning material mounting plate on the lower side of the car frame. As a result, it is possible to suppress the increase in the height dimension under the car frame and to cope with the elevator pit depth which has the same volume as before, and furthermore, the car sheave between the car sheave support and the car frame lower beam. To reduce the vibration from the car, the vibration is not transmitted to the lower beam of the car frame and the car supported by this, improve the ride comfort of the car, and respond to high-speed elevators as much as the vibration is reduced. enable.

According to a second aspect of the invention, in the elevator car frame of the first aspect, the vibration isolator mounting plate mounted on the lower beam of the car frame also serves as a shock absorber receiver. Reduce the volume of structural members.

According to a third aspect of the present invention, in the elevator car frame according to the first or second aspect, mounting holes for the cushioning material are provided at a plurality of locations on the cushioning material attaching plate on the side of the lower sheave support. By dividing and attaching the cushioning material, the number of cushioning materials can be increased or decreased according to the required degree of cushioning, and the degree of freedom in design is large.

According to a fourth aspect of the present invention, in the elevator car frame according to the first to third aspects, the shape of the cushioning material is square or circular, and the shape of the cushioning material is determined according to the required degree of cushioning. The cushioning material can be selected, and the degree of freedom in design is great.

According to a fifth aspect of the present invention, in the elevator car frame according to any one of the first to fourth aspects, it is possible to adjust a mounting angle between the car lower sheave support and the car frame lower beam. Adjustment is easy.

According to a sixth aspect of the present invention, in the elevator car frame according to the first to fifth aspects, at least the cushioning material mounting plate on the side of the lower car sheave support is attached to the lower beam of the car frame in a normal use state. The damping action of the cushioning material is not impaired, and the car undercar sheave support is supported so as not to fall off during a strong earthquake, and the safety in the event of an earthquake is secured while maintaining the cushioning characteristics.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the configuration of the first embodiment of the present invention. The structure of the car frame of the lift elevator according to the first embodiment is as follows. Car 6
Of the car frame lower beam 3 supporting the bottom of the car frame via a cushioning material 20 such as a vibration isolating rubber.
0 is attached. The shock absorber receiver is used to reduce the transmission of impact to the car 6 by colliding with a shock absorber provided in the pit when the car falls for some reason. The portion shown in FIG. . A car frame lower beam side (upper side) cushioning material mounting plate 11 is mounted on the lower surface side of the distal end portion of the shock absorber and vibration isolator receiver 10.

On the other hand, a car lower sheave support stand side (lower side) cushioning material mounting plate 12 is also mounted on the upper surface side of the car lower sheave support base 9 at both ends thereof. It is vertically opposed to the material mounting plate 11. And
A cushioning material 13 such as a vibration-proof rubber is interposed between these upper and lower cushioning material mounting plates 11 and 12. The cushioning material 13 may be a rectangular parallelepiped or a column.

In the elevator car frame having the above structure, the lifting rope 5 is wound around the lower sheave 4, and the lower rope 4 is raised and lowered by the movement of the lifting rope 5, so that the lower sheave support 9 and the lower car The car 6 is finally lifted and lowered via the frame lower beam 3. When the car 6 is lifted and lowered, the vibration of the lifting rope 5 causes the car lower sheave 4 and the car lower sheave support 9 to vibrate. In this case, the cushioning member 13 attenuates the vibration and prevents the vibration from being transmitted to the car frame lower beam 3 and the car 6. Thereby, the vibration of the car 6 at the time of elevating and lowering is reduced, and the riding comfort is improved. In addition, since the vibration transmitted to the car 6 is reduced, the elevator can be moved at a high speed, the speed of the lift-up elevator can be increased, and the cushioning member 20 is eliminated by eliminating the support member provided in the conventional example. Is provided, the height under the car frame is reduced, and it is possible to cope with the elevator pit depth which has the same volume as the conventional one.

Further, the structure below the car frame is achieved by using a structure in which the shock absorber receiver and the vibration isolator receiver for the lower car sheave are also used by the shock absorber and vibration isolator receiver 10 mounted on the lower beam 3 of the car frame. Can be made more compact.

Next, a second embodiment of the present invention will be described with reference to FIG. The feature of the second embodiment lies in the structure of the lower cushioning material mounting plate 12 for mounting the cushioning material 13. That is, as shown in FIG. 2, elongated holes 14 are formed at a plurality of locations on a lower cushioning material mounting plate 12 attached to the upper surface of the lower car sheave support 9, and locking projections ( (Not shown) is fitted using its elasticity.

When the lower cushioning material mounting plate 12 has the above-described structure, and a plurality of cushioning materials 13 to be attached to the lower cushioning material mounting plate 12 are used, the mounting pitch or position of each cushioning material 13 is determined by the length of the elongated hole 14. Just be able to adjust. By adjusting the mounting pitch and position of the cushioning material 13, the natural frequency of the mechanical system supporting the lower car sheave can be adjusted, and the vibration isolation effect can be enhanced.

Next, a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, bolt mounting plates 15 and 16 are provided on the side surfaces of the upper cushioning material mounting plate 11 and the lower cushioning material mounting plate 12, respectively. Through the car frame lower beam 10 and tightened by the nut 18.

In the case of this embodiment, at the time of the elevator installation work, the falling-off prevention bolt 17 is fixed to the bolt mounting plate 16 of the lower cushioning material mounting plate 12 by the double nut 19 as shown in FIG. By tightening the nut 18, the upper and lower cushioning material mounting plates 1
1, 12 and the cushioning material 13 between them are integrated.

When the installation work of the elevator is completed and the adjustment work (and the operation state of the elevator thereafter) is started, as shown in FIG.
By tightening the bolt mounting plate 15 on the upper cushioning material mounting plate 11 side to the car frame lower beam 10 side, the captive bolt 17 is fixed, and the top of the captive bolt 17 is a bolt on the lower cushioning material mounting plate 12 side. The mounting plate 16 is loosely fitted. Thereby, the cushioning member 13 is in a free state, and the vibration is attenuated so that the vibration is not transmitted from the lower cushioning member mounting plate 12 to the upper cushioning member mounting plate 11 side. Moreover,
In this case, even when the shock-absorbing material 13 is in a free state, the falling-off prevention bolt 17 is loosely inserted into the bolt-mounting plate 16 on the lower shock-absorbing material mounting plate 12 side. The side cushioning material mounting plate 12 and the car lower sheave support 9 are reliably prevented from dropping. Therefore, according to the third embodiment, the workability and the safety of the elevator installation work can be improved.

When the upper cushioning plate 11 is fixed to the lower beam 10 of the car frame, only the lower cushioning plate 12 is attached to the lower beam 10 of the car frame using the bolts 17 and nuts 18, 19. It can be configured to support.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The feature of the fourth embodiment resides in that a mechanism capable of adjusting the mounting angle of the lower car sheave support 9 is provided. The lower car sheave support 9 is attached to the lower cushioning material mounting plate 12 as shown in FIG. 1, and the shape of the mounting hole 21 is set to a circumference A (centered at the intersection of the center of the car and the car suspension core). (See FIG. 1), and has a slot along its circumference A as shown in FIG. The lower car sheave support 9 is attached to the mounting hole 21 of the elongated hole through a bolt 22. The mounting angle of the car lower sheave support 9 is adjusted by sliding the bolt 22 along the mounting hole 21 to an appropriate position, and then tightened and fixed.

With this arrangement, the car lower sheave support 9 can be changed to an appropriate angle and fixed while keeping the car suspension core and the lifting rope's core coincident with each other. Even if a slight displacement occurs at the drop position of the rope, the displacement can be absorbed.

FIG. 6 shows a structure for attaching the lower car sheave 4 to the lower car sheave support 9. That is, a bearing mounting hole 23, which is a long hole in the horizontal direction, is provided at an end of the undercar sheave support base 9, and an undercar sheave bearing 25 is mounted on the bearing mounting hole 23 using a mounting bolt 24. Reference numeral 26 denotes an axle of the lower car sheave 4.

Thus, the pitch of the car sheave 4 attached to both ends of the car sheave support 9 can be adjusted, thereby changing the natural frequency of the mechanical system supporting the car sheave 4. The ride comfort can be adjusted by adjusting the characteristic value and the vibration response characteristic of the car.

[0027]

As described above, according to the first aspect of the present invention,
By eliminating the support member attached to the conventional car frame lower beam to support the lower car sheave support, and incorporating a buffer mechanism in that part, damping the vibration from the lower car sheave, Vibration is not transmitted to the lower beam of the car frame, and the car frame and the car supported by the car frame, so it is possible to improve the ride comfort of the car and to correspond to high-speed elevators as much as the vibration is reduced It is. Furthermore, according to the invention of claim 1, an increase in the height dimension of the structural member below the car frame is suppressed by inserting a cushioning material as an alternative to the conventional support member, and the elevator pit has the same volume as the conventional one. Is also possible.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the vibration isolator mounting plate mounted on the lower beam of the car frame is also used as a shock absorber receiver, so that the structure below the car frame is reduced. It can be made compact.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the buffer material mounting holes are provided at a plurality of positions on the buffer material mounting plate on the side of the car lower sheave support base. The number of cushioning materials can be increased or decreased or the mounting pitch can be changed according to the required degree of cushioning by dividing the It is easy to make adjustments that effectively suppress the vehicle, and the riding comfort can be improved.

According to the fourth aspect of the invention, in addition to the effects of the first to third aspects, since the shape of the cushioning material is square or circular, a cushioning material having a shape corresponding to a necessary cushioning characteristic is selected. can do.

According to the fifth aspect of the present invention, in addition to the effects of the first to fourth aspects of the present invention, the angle of attachment between the lower car support and the lower beam of the car frame can be adjusted, so that the adjustment at the time of installation is easy. It is.

According to the invention of claim 6, in addition to the effects of the invention of claims 1 to 5, at least the cushioning action of the cushioning material is not impaired in at least the normal use state of the undercar sheave support base side cushioning plate, and In the event of a strong earthquake such as that described above, the support for the lower sheave of the car was supported so that it would not fall off. And increase safety.

[Brief description of the drawings]

FIG. 1 is a front view and a bottom view of a first embodiment of the present invention.

FIG. 2 is a plan view of a lower cushioning material mounting plate according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which a captive bolt is tightened to upper and lower cushioning material mounting plates in a third embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a state in which a captive bolt is loosened with respect to upper and lower cushioning material mounting plates in the third embodiment.

FIG. 5 is a plan view showing a mounting structure of a lower car sheave support and a lower cushioning material mounting plate according to a fourth embodiment of the present invention.

FIG. 6 is a front view showing an attachment structure of a lower car sheave to a lower car sheave support according to the fourth embodiment.

FIG. 7 is a front view of a conventional example.

FIG. 8 is a bottom view of a conventional example.

[Explanation of symbols]

 Reference Signs List 3 Lower beam of car frame 4 Lower sheave of car 5 Lifting rope 6 Riding car 9 Lower sheave support of car 10 Support of shock absorber and vibration isolator receiver 11 Lower frame side (upper side) cushioning material mounting plate 12 Lower car sheave support Side (lower) cushioning material mounting plate 13 cushioning material 14 cushioning material mounting hole 15 bolt mounting plate 16 bolt mounting plate 17 captive bolt 18 nut 19 double nut 20 cushioning material 21 mounting hole 22 mounting bolt 23 mounting hole 24 mounting bolt 25 Lower basket sheave bearing

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Hayakawa 3-20-14 Higashi Gotanda, Shinagawa-ku, Tokyo Toshiba Elevator Co., Ltd. (72) Inventor Hideya Ohara 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation F-term in Fuchu factory (reference) 3F305 BB19 BC18 CA02 CA08

Claims (6)

[Claims] 1. A lift type elevator in which a car lower sheave support provided with a car lower sheave at both ends thereof is provided on a lower part of a car frame supporting a car, and a cushioning material mounting plate is provided on the car lower sheave support. And a vibration isolator mounting plate is mounted on the lower cage frame beam. A portion of the vibration isolator mounting plate opposite to the buffer mounting plate on the lower car sheave support stand side has a cushion on the lower side of the car frame. A car frame for an elevator, wherein a material mounting plate is mounted, and a cushioning material is interposed between the upper and lower cushioning material mounting plates, and the lower car sheave support is mounted on the lower car frame beam. 2. The elevator car frame according to claim 1, wherein the vibration isolator mounting plate mounted on the lower beam of the car frame is also used as a shock absorber receiver. 3. The elevator car frame according to claim 1, wherein mounting holes for the cushioning material are provided at a plurality of positions on the cushioning material mounting plate on the side of the lower car sheave support stand. 4. The elevator car frame according to claim 1, wherein said cushioning member has a square shape or a circular shape. 5. The elevator car frame according to claim 1, wherein an angle of attachment between said car lower sheave support stand and said car frame lower beam can be adjusted. 6. At least the cushioning member mounting plate on the side of the car lower sheave support stand does not impair the cushioning action of the cushioning member in a normal use state with respect to the car frame lower beam. The elevator car frame according to any one of claims 1 to 5, wherein the support base is supported so as not to fall off.