Patent Description:
The art disclosed in <CIT> has been proposed as the conventional elevator passenger car structure. <CIT> discloses the car frame constituted by a pair of vertical frames disposed parallel to a pair of guide rails, a lower beam which is provided with a pulley, and connected to lower sections of the pair of vertical frames while making the longitudinal direction horizontally oriented, and an upper beam which is connected to upper sections of the pair of vertical frames while making the longitudinal direction horizontally oriented. The pair of under-car frames fabricated by L-shaped steel is disposed on the upper surface of the lower beam in the direction orthogonal to the longitudinal direction of the lower beam. The pair of under-car frames is connected to a pair of support frames which is disposed in the direction orthogonal to the longitudinal direction of the pair of under-car frames. The pair of under-car frames serves to support a car room. <CIT> discloses an elevator car according to the preamble of independent claim <NUM> that is configured in such a manner that a car frame has a left and right pair of car floor support frames for supporting the car chamber.

The elevator passenger car as disclosed in <CIT> had a disadvantage of insufficient rigidity of the pair of under-car frames for supporting the car room. It was therefore required to connect the pair of under-car frames to the pair of support frames disposed in the direction orthogonal to the longitudinal direction of the pair of under-car frames, resulting in the complicated configuration.

An object of the present invention is to provide an elevator passenger car, which allows enhancement of rigidity of the lower beam with the simple configuration while suppressing an increase in the number of components, and an elevator provided with the passenger car.

For attaining the object, the present invention provides an elevator passenger car as defined in claim <NUM>.

The present invention provides an elevator as defined in claim <NUM>. The additional dependent claims describe optional embodiments of the invention. Advantageous Effects of Invention.

The present invention provides the elevator passenger car which allows enhancement of rigidity of the lower beam with the simple configuration while suppressing an increase in the number of components, and the elevator provided with the passenger car.

An embodiment of the present invention will be described referring to the drawings. The same components will be designated with the same reference signs so that the redundant explanations are omitted.

Each of the respective components of the present invention does not have to be independent of each other. The structures as described as follows are allowed. For example, the single component may be constituted by multiple members. Each of the multiple components may be constituted by the single member. A specific component constitutes a part of another component. A part of a specific component may serve as a part of the other component.

<FIG> schematically illustrates a structure of an elevator system according to an embodiment of the present invention. Referring to <FIG>, the elevator system is disposed in an unshown hoistway. One end of a main rope <NUM> wound around a hoisting machine <NUM> is suspended through under-car pulleys 4A, 4B disposed below a passenger car <NUM>, and fixed to an upper position of the hoistway. The other end of the main rope <NUM> is suspended through a pulley <NUM> above a balance weight <NUM>, and fixed to an upper position of the hoistway. The elevator system is configured to vertically move the passenger car <NUM> disposed at one side of the main rope, and the balance weight disposed at the other side of the main rope in the hoistway by rotatably driving the hoisting machine <NUM>.

<FIG> is an enlarged side view of the passenger car <NUM> as illustrated in <FIG>. In the embodiment, directions of front-rear, up-down, and left-right are defined on the basis of a sight of a user of the elevator with respect to the passenger car <NUM> as illustrated in <FIG>. Referring to <FIG>, the passenger car <NUM> includes a car frame <NUM> and a car room <NUM> that is formed inside the car frame <NUM>.

The car frame <NUM> includes an upper beam <NUM> disposed above the car room <NUM>, a lower beam <NUM> disposed below the car room <NUM>, and a pair of vertical frames 11A, 11B for connecting the respective ends of the upper beam <NUM> and the lower beam <NUM>. The vertical frame 11A is not shown in the drawing as it is located at a back side of the car room <NUM>. The car frame <NUM> is disposed closer to the front side from the center of the front-rear direction of the car room <NUM>. The under-car pulleys 4A, 4B are positioned at the center of the car room <NUM> in the front-rear direction.

<FIG> is a perspective view only of the car frame as illustrated in <FIG>. Referring to <FIG>, the car frame <NUM> is formed by connecting upper ends of the pair of vertical frames 11A, 11B to both longitudinal (left-right direction) ends of the upper beam <NUM> disposed at the upper side using bolts <NUM>, and connecting lower ends of the pair of vertical frames 11A, 11B to both longitudinal (left-right direction) ends of the lower beam <NUM> disposed at the lower side using bolts <NUM>.

The lower beam <NUM> formed to have a U-like shape with an upper open section includes a mount part 10A having one upper end bent outward (front side), and a mount part 10B having the other upper end bent inward (front side). The car frame <NUM> is disposed along an unshown guide rail. An emergency stop device <NUM> disposed below the lower beam <NUM> applies braking force to the passenger car <NUM> via the guide rails when the speed of the passenger car <NUM> exceeds the predetermined fall speed so that the passenger car <NUM> is stopped. A guide device bracket <NUM> is disposed below the emergency stop device <NUM> for securing stability upon vertical movement of the passenger car <NUM> along the guide rail.

A pair of underfloor side surface beams 14A, 14B is mounted on the mount parts 10A, 10B as upper parts of the lower beam <NUM>, which will be described in detail later, and are fixed with bolts <NUM> (<FIG>). A floor of the car room <NUM> is mounted on the underfloor side surface beams 14A, 14B at the part indicated by a dotted frame <NUM> of <FIG> via antivibration devices <NUM>. The underfloor side surface beams 14A, 14B are horizontally disposed inside the space defined by the opposing vertical frames 11A, 11B while extending in the front-rear direction orthogonally to the left-right direction (longitudinal direction) of the lower beam <NUM>.

Pulley brackets 16A, 16B are fixed to the lower surfaces of the underfloor side surface beams 14A, 14B with bolts <NUM>, respectively. The under-car pulleys 4A, 4B are rotatably journaled to the pulley brackets 16A, 16B. A rope guide <NUM> is fixed with bolts <NUM> below the pulley brackets 16A, 16B so as to be connected to each other. The rope guide <NUM> is configured to prevent foreign matters from being caught in the main rope <NUM> wound around the under-car pulleys 4A, 4B.

The structure of the underfloor side surface beam will be described referring to <FIG> is an overall perspective view of the underfloor side surface beam according to the embodiment of the present invention. <FIG> is a sectional view taken along line V-V of <FIG>. The underfloor side surface beam 14A has a U-shaped section cut in the direction orthogonal to the longitudinal direction, which is reinforced while having an upwardly directed open section.

An underfloor side surface beam reinforcing member <NUM> has a U-shaped section cut in the direction orthogonal to the longitudinal direction reinforced while having a downwardly directed open section disposed opposingly to the upwardly directed open section of the underfloor side surface beam 14A. The underfloor side surface beam reinforcing member <NUM> is formed to have a width of the section cut orthogonally to the longitudinal direction larger than a width of the underfloor side surface beam 14A. The underfloor side surface beam reinforcing member <NUM> and the underfloor side surface beam 14A are arranged to have the respective open sections opposite to each other so that the underfloor side surface beam 14A is inserted to be fitted with the inside of the underfloor side surface beam reinforcing member <NUM>. Each of the inner side surfaces of the underfloor side surface beam reinforcing member <NUM> and each of the outer side surfaces of the underfloor side surface beam 14A are opposingly joined and fixed with bolts <NUM>.

The underfloor side surface beam reinforcing member <NUM> is formed to have its longitudinal direction length shorter than that of the underfloor side surface beam 14A, and located in the center of the underfloor side surface beam 14A. Because of difference in the longitudinal direction length between the underfloor side surface beam 14A and the underfloor side surface beam reinforcing member <NUM>, both ends each having no opposing section of the underfloor side surface beam reinforcing member <NUM> disposed above serve as areas on which the floor of the car room <NUM> is mounted via the antivibration devices <NUM> to be described in detail later.

The underfloor side surface beam 14A is reinforced by the underfloor side surface beam reinforcing member <NUM> in the form of a simple fitting structure without largely changing the outer appearance configuration. The underfloor side surface beam is mounted on the lower beam <NUM> at the section reinforced by the underfloor side surface beam reinforcing member <NUM>. Accordingly, it is possible to impart sufficient strength to both the underfloor side surface beams 14A, 14B using the relatively simple configuration with small number of components.

Although not shown in the drawing, the other underfloor side surface beam 14B is similarly configured to the underfloor side surface beam 14A as described above.

Connection of the lower beam <NUM> to the underfloor side surface beams 14A, 14B will be further described referring to <FIG> and <FIG>. As <FIG> and <FIG> illustrate, each of the underfloor side surface beams 14A, 14B is longitudinally longer than the underfloor side surface beam reinforcing member <NUM>, and fixed onto the lower beam <NUM> each at the section reinforced by the underfloor side surface beam reinforcing member <NUM>.

Since each of the underfloor side surface beams 14A, 14B is longitudinally longer than the underfloor side surface beam reinforcing member <NUM>, antivibration device mount sections 19A, 19B are formed on both longitudinal direction ends each having no opposing section of the underfloor side surface beam reinforcing member <NUM> disposed above. Corresponding to the dotted frame <NUM> shown in <FIG>, the antivibration devices <NUM> are disposed on the antivibration device mount sections 19A, 19B, on which the floor of the car room <NUM> is mounted via the antivibration devices <NUM>. The antivibration device <NUM> is made of an elastic body such as a coil spring, rubber, and the like.

<FIG> is a partially enlarged view of the dotted frame of <FIG>. A reinforcing plate <NUM> serving as a panel is disposed on the bottom of the underfloor side surface beam 14B at the antivibration device mount section 19B. Another reinforcing plate <NUM> corresponding to the reinforcing plate <NUM> is disposed below the lower surface of a floor <NUM> of the car room <NUM>. The multiple antivibration devices <NUM> intervene between the opposing reinforcing plates <NUM> and <NUM>. A stopper bolt <NUM> is inserted through a hole <NUM> formed in the bottom of the underfloor side surface beam 14B and the reinforcing plate <NUM>. A leading end of the stopper bolt <NUM>, which is screwed with a nut <NUM>, is inserted into a hole <NUM> of the floor <NUM> while having the nut <NUM> around the leading end in contact with the lower surface of the reinforcing plate <NUM> for preventing the slipping-off.

An adjusting jack bolt <NUM> is inserted into the other hole <NUM> formed in the bottom of the underfloor side surface beam 14B and the reinforcing plate <NUM>. A gap G (opening) is formed between a leading end of the adjusting jack bolt <NUM> and the reinforcing plate <NUM> for adjusting a flexure amount of the antivibration device <NUM>. The adjusting jack bolt <NUM> holds the space between the reinforcing plates <NUM> and <NUM> when the elevator is in operation so that the floor <NUM> of the car room <NUM> is supported with the antivibration devices <NUM>. The vibration of the passenger car <NUM> thus can be absorbed by the antivibration device <NUM>. When replacing the antivibration device <NUM>, the adjusting jack bolt <NUM> is rotated to reduce the gap G so that the leading end of the adjusting jack bolt <NUM> is brought into abutment on the reinforcing plate <NUM>. The adjusting jack bolt <NUM> is further rotated to bring the reinforcing plate <NUM> and the antivibration device <NUM> into the non-contact state. In this state, the passenger car <NUM> is lifted by the adjusting jack bolt <NUM> so that the old antivibration device <NUM> which has been used in the state is replaced with a new antivibration device <NUM>. Thereafter, the adjusting jack bolt <NUM> is rotated in reverse until the predetermined gap G between the leading end of the adjusting jack bolt <NUM> and the reinforcing plate <NUM> is restored to bring the reinforcing plate <NUM> into contact with the antivibration device <NUM>.

Although not described herein, the underfloor side surface beam 14A is also similarly configured.

As described above, the embodiment includes the upper beam <NUM> disposed at an upper side, the pair of vertical frames 11A, 11B having upper ends connected to both ends of the upper beam <NUM> in a longitudinal direction, the lower beam <NUM> disposed between lower ends of the pair of vertical frames 11A, 11B while having both ends connected thereto, and the pair of underfloor side surface beams 14A, 14B which is mounted and connected onto the both ends of the lower beam <NUM> while extending in a direction orthogonal to the lower beam <NUM>. The car room <NUM> is disposed at a part defined by the upper beam <NUM>, the pair of vertical frames 11A, 11B, and the lower beam <NUM>. The car room <NUM> is mounted on the pair of underfloor side surface beams 14A, 14B. The underfloor side surface beam reinforcing member <NUM> is provided for each of the pair of underfloor side surface beams 14A, 14B so as to be reinforced. The underfloor side surface beam reinforcing member <NUM> is located in at least each center of the underfloor side surface beams 14A, 14B.

The structure allows the underfloor side surface beams 14A, 14B to be reinforced by the underfloor side surface beam reinforcing member <NUM> without largely changing the configuration. The section rigidity of an area around the center to which the stress is applied intensively can be sufficiently enhanced with the simple configuration with small number of components.

In the embodiment, in addition to the above-described structure, the pair of underfloor side surface beams 14A, 14B has the U-shaped section cut in the direction orthogonal to the longitudinal direction, having an upwardly directed open section. The underfloor side surface beam reinforcing member <NUM> has the U-shaped section cut in the direction orthogonal to the longitudinal direction, having the downwardly directed open section to be opposite to each of the open sections of the pair of underfloor side surface beams 14A, 14B.

In the structure, the underfloor side surface beams 14A, 14B of U-shaped section, and the underfloor side surface beam reinforcing member <NUM> of U-shaped section are arranged to have the respective open sections are opposite to each other. This makes it possible to further enhance each section rigidity of the underfloor side surface beams 14A, 14B.

In the embodiment, in addition to the above-described structure, each longitudinal direction length of the pair of underfloor side surface beams 14A, 14B is longer than the longitudinal direction length of the underfloor side surface beam reinforcing member <NUM>. The antivibration devices are disposed on both ends of each of the pair of underfloor side surface beams 14A, 14B, each end having no opposing section of the underfloor side surface beam reinforcing member <NUM> disposed above for accommodating the car room <NUM> via the antivibration devices <NUM>.

The structure allows provision of the antivibration devices <NUM> to provide the passenger car <NUM> with less vibrations by enhancing each section rigidity of the underfloor side surface beams 14A, 14B.

In the embodiment, in addition to the above-described structure, the reinforcing plate <NUM> is disposed below the lower surface of the car room <NUM>. The adjusting jack bolt <NUM> is inserted into the hole <NUM> formed in each bottom at both ends of the pair of underfloor side surface beams 14A, 14B.

Claim 1:
An elevator passenger car comprising an upper beam (<NUM>) disposed at an upper side, a pair of vertical frames (11A, 11B) having upper ends connected to both ends of the upper beam (<NUM>) in a longitudinal direction, a lower beam (<NUM>) disposed between lower ends of the pair of vertical frames (11A, 11B) while having both ends connected, and a pair of underfloor side surface beams (14A, 14B) which is mounted and connected onto the both ends of the lower beam (<NUM>) while extending in a direction orthogonal to the lower beam (<NUM>),
the elevator passenger car (<NUM>) having a car room (<NUM>) disposed at a part defined by the upper beam (<NUM>), the pair of vertical frames (11A, 11B), and the lower beam (<NUM>), the car room (<NUM>) being mounted on the pair of underfloor side surface beams (14A, 14B),
wherein an underfloor side surface beam reinforcing member (<NUM>) is provided for each of the pair of underfloor side surface beams (14A, 14B) so as to be reinforced,
characterised in that each of the pair of underfloor side surface beams (14A, 14B) has a U-shaped section cut in a direction orthogonal to the longitudinal direction, having an upwardly directed open section; and
the underfloor side surface beam reinforcing member (<NUM>) has a U-shaped section cut in a direction orthogonal to the longitudinal direction, having a downwardly directed open section to be opposite to each of the open sections of the pair of underfloor side surface beams (14A, 14B).