JP5483759B2 - Counterweight and elevator equipped with it - Google Patents

Description

  Embodiments described herein relate generally to a counterweight provided in a hoistway and an elevator including the counterweight.

  For elevators where the counterweight can be seen from inside the car or outside the hoistway, such as elevators for viewing, for multiple layers of weights, rope attachments such as hoisting ropes and countering ropes, and hoisting ropes Since the maintenance work part of the rotating part such as the sheave and the rail guide of the machine impairs the beauty, the cover is often attached to the counterweight in order to improve the appearance. It is also possible to attach a cover to the counterweight as a measure against wind noise and wind pressure.

  The ropes such as the hoisting rope and the balancing rope are connected to the counterweight via a shackle rod having a screw threaded at the end. Since the tension of the rope is loosened due to aging, it is necessary to periodically adjust the rope so that a predetermined tension is applied by the nut on the screw side of the shackle rod. In addition, if there is an error in the length between a plurality of ropes, the tension of each rope will be unbalanced, so it is necessary to adjust with a nut so as to obtain a uniform tension. For structures with a sheave on the counterweight side, periodically check for grease up on the sheave rotating shaft and wear on the rope groove, and on the rail guide for wear on the guide shoe. There is a need. In such maintenance (adjustment, inspection, etc.), the maintenance staff arranges the counterweight and the car in the vicinity of the intermediate position of the hoistway at the same height position on the car and opens the cover.

  As a form of opening the cover, a method is known in which a rectangular hole is provided in the rope hitch portion of the cover, and a rope hitch plate that covers the hole is attached with a fixing screw. Further, as an improvement technique, it has been proposed that a rope hitch plate that covers a rectangular hole without removing the fixing screw is used as a movable door (see, for example, Patent Document 1). As another improvement technique, a cover is provided with a dart hole or a slide notch hole, or the cover is fixed to an adjacent cover via a hinge so that the cover slides or rotates in a direction overlapping the adjacent cover. There is also a proposal for a configuration that moves dynamically (see, for example, Patent Document 2).

JP 2006-151603 JP2010-195517

  However, in patent document 1, since the door divided | segmented with respect to each part inspection location is provided, the effort of the opening / closing operation | work with respect to an inspection location will increase. In other words, regardless of whether there is a sheave for the hoisting rope on the counterweight side, at least six points, which are the total of the two rope hitch parts by the hoisting rope and the balancing rope, and the four rail guides are inspected. If a door is provided for each location, opening and closing work takes time.

  Moreover, in patent document 2, it is set as the structure which carries out a slide movement or rotation movement to the direction (namely, downward direction) in which the cover with which several sheets are attached overlaps with an adjacent cover. Therefore, when opening the uppermost cover, the inspector checking on the car performs an operation of lowering the cover in the direction of his / her feet when trying to open the uppermost cover so as to overlap the second cover from the top. Therefore, it is mainly required from the viewpoint of work and safety to arrange so as to adjust the mutual position of the rider and the counterweight so that the uppermost cover can be accommodated. Note that the same applies not only when attempting to open so as to overlap the second cover but also when attempting to open by moving in a direction overlapping with the third or less cover.

  The present invention has been made to solve such a problem. When a maintenance worker works on a counterweight on a car, the workability of the maintenance worker is improved and the car is It is an object of the present invention to provide a counterweight that is not affected by the arrangement of the counterweight and an elevator including the counterweight.

  The counterweight according to the embodiment is a counterweight used in an elevator, and includes a plurality of weight pieces, a weight holding means on which the weight pieces are mounted, and a plurality of pieces detachably attached to the weight holding means. A cover, and a cover holding unit that holds the cover so as to be movable in a direction not overlapping the adjacent cover.

The whole elevator hoistway block diagram of 1st Embodiment. The perspective view of the counterweight of 1st Embodiment. The perspective view of the counterweight of 1st Embodiment. The rear perspective view of the cover of the counterweight of 1st Embodiment. The perspective view of the guide of the counterweight of 1st Embodiment. The perspective view which shows the state at the time of the maintenance work of the counterweight in 1st Embodiment. The perspective view which shows the safety measure jig | tool of 1st Embodiment. The perspective view at the time of the safety measure jig operation | movement of 1st Embodiment. The back perspective view of the cover of the counterweight of 2nd Embodiment. The perspective view which shows the state at the time of the maintenance work of the counterweight in 2nd Embodiment. The side view explaining operation | movement of the cover of the counterweight of 3rd Embodiment. The perspective view which shows the state at the time of the maintenance work of the counterweight in 4th Embodiment.

  Hereinafter, a counterweight according to an embodiment and an elevator including the same will be described with reference to the accompanying drawings. In the second and subsequent embodiments, the same components as those already described are denoted by the same reference numerals and description thereof is omitted.

[First Embodiment]
First, the first embodiment will be described. FIG. 1 is an overall configuration diagram of an elevator hoistway according to the present embodiment. A car 12 and a counterweight 13 are suspended from a hoistway 11 of the elevator 10 via a hoisting rope 14. A balancing rope 15 is suspended below the car 12 and the counterweight 13.

  2 and 3 are perspective views of the counterweight of the present embodiment, and FIG. 3 is drawn without a cover described later. The counterweight 13 is attached to a plurality of weight pieces 13f, weight holding means 13h on which the weight pieces 13f are mounted, a plurality of covers 16 that are detachably attached to the weight holding means 13h, and the weight holding means 13h. Cover holding means 13k (see FIG. 4) for holding the cover 16 so as to be movable in a direction not overlapping the adjacent cover 16.

  In this embodiment, the weight holding means 13h is provided with a weight frame 13a on which a weight piece 13f is mounted, and the cover holding means 13k is provided with a guide 16b for guiding the cover 16. FIG. 4 is a rear perspective view of the cover. In this embodiment, the guide 16b is a linear motion guide that is linear in the vertical direction.

  In the present embodiment, the cover 16 is slidable in a direction not overlapping the adjacent cover 16 by the guide 16b. Here, the non-overlapping direction is a direction that is not adjacent to the cover side. In the present embodiment, when the cover 16 is attached, the adjacent cover 16 is positioned on the lower side, and the sliding movement direction of the cover 16 is on the upper side.

  Further, the counterweight 13 has a counterweight sheave 13c. In this embodiment, four rail guides 13b are attached to the weight frame 13a, and the counterweight sheave 13c is attached to the upper portion of the weight frame 13a.

  The weight frame 13a is provided with a balancing rope hitch 13d. A shackle rod 13e at the end of the balancing rope is attached to the balancing rope hitch 13d and is fixed by the balancing rope hitch 3. A plurality of weight pieces 13f are stacked on the weight frame 13a, and a plurality of cover attachments 13g are attached to the weight frame 13a at predetermined positions along the vertical direction.

  As a modification of the present embodiment, a case where a hoisting rope hitch is attached instead of the counterweight sheave 13c, or a case where the rail guide is not limited to four places can be assumed.

  FIG. 2 shows a case where the number of covers 16 attached to the counterweight 13 is 6 on one side and 12 in total on both sides. As a modification of the present embodiment, the case where the cover 16 is only on one side of the counterweight 13 also falls within the scope of the present embodiment. The cover 16 is provided with a cover-side guide attachment 16a, and a guide 16b is attached thereto.

  FIG. 5 is a perspective view of the guide 16b. In the present embodiment, the guide 16b has a three-stage configuration including a small guide 16c, an intermediate guide 16d, and a large guide 16e. The small guide 16c is fixed to the cover-side guide attachment 16a, and the large guide 16e is fixed to the cover attachment 13g. The guide 16b may have any function as a guide other than the present embodiment. One end is attached to the weight frame 13a side and the other end is attached to the cover 16 side, and the cover 16 is moved in a linear direction other than the lower side. Anything is possible.

  Next, the operation and effect of this embodiment will be described with reference to FIGS. FIG. 6 is a perspective view showing a state during the maintenance work of the counterweight in the present embodiment. When performing maintenance work on the counterweight 13, the maintenance staff slides the cover 16 at the inspection location by lifting it in a direction that does not overlap the adjacent cover 16, that is, vertically upward as shown in FIG. Here, in the present embodiment, the uppermost cover 16 is slid. However, for example, the lowermost cover may be slid in a direction that does not overlap with the adjacent cover. It is also within the scope of this embodiment that the second cover slides in the opposite direction to the third cover, that is, upward, after the upper cover slides.

  FIG. 7 is a perspective view showing the safety measure jig of the present embodiment. FIG. 8 is a perspective view when the safety measure jig of the present embodiment is operated. When the maintenance staff slides the cover 16 upward for inspection, for example, the safety measure jig 7 is provided in the cover mounting article 13g in advance, and the cover 16 is covered by the safety device jig 17 during the sliding of the cover 16. The structure does not fall. In the present embodiment, a mechanical configuration such as the safety device jig 17 is described. However, even in other cases, a light sensor transmission device is provided on the cage, and this transmission is sent to the counterweight 13. By providing a receiver for receiving a signal from the device, an electrical safety device can be provided.

  In the present embodiment, the movable direction of the cover 16 is the vertical direction (vertical direction), and the second cover 16 from the top can be slid upward and opened with the uppermost cover 16 opened. The third and subsequent covers 16 can be similarly opened. Accordingly, when a maintenance worker works on the counterweight 13 on the car 12, the workability of the maintenance staff is improved and the arrangement of the car 12 and the counterweight 13 is not affected.

[Second Embodiment]
Next, a second embodiment will be described. FIG. 9 is a rear perspective view of the cover constituting the counterweight of the present embodiment. In the present embodiment, compared to the first embodiment, one of the hinges 28 is attached to the inner surface side of the cover 16 instead of the cover-side guide attachment article 16a, and the other hinge 28 is attached to the cover attachment article 13g. Yes.

  FIG. 10 is a perspective view showing a state during maintenance work of the counterweight in the present embodiment. When maintenance work is performed on the counterweight 23, the maintenance staff rotates the cover 16 at the inspection location in a direction that does not overlap the adjacent cover 16, that is, the center of rotation is arranged at the upper end of the cover, and from the lower end. The cover 16 is opened so as to rotate upward, and the cover 16 is lifted. The rotation angle can be up to 180 °, and the hinge 28 is fixed when rotated 180 °, that is, the rotation angle of the hinge 28 is stopped and the rotation angle is maintained. In this embodiment, the uppermost cover 16 is rotated. However, for example, the lowermost cover 16 may be rotated in a direction that does not overlap with the adjacent cover 16, or a plurality of covers may be provided. 16, after the uppermost cover 16 is rotated 180 °, the second cover 16 may be rotated 180 ° in a direction not overlapping the third cover 16, that is, in the direction of the uppermost cover 16. This is within the scope of the embodiment. Moreover, it is good also as a mechanism in which the hinge 28 is fixed when it rotates to an angle (for example, 120 degrees) smaller than 180 degrees.

  The safety measures when the maintenance staff rotates the cover 16 for inspection as shown in FIG. 10 are the same as in the first embodiment (placement of the safety measure jig 7).

  According to this embodiment, the rotation direction of the cover 16 is a direction that does not overlap with the adjacent cover 16, and the rotation angle is 180 °. Accordingly, when a maintenance worker works on the counterweight 23 on the car 12, the workability of the maintenance staff is improved, and the arrangement of the car 12 and the counterweight 23 is not affected.

[Third Embodiment]
Next, a third embodiment will be described. FIG. 11 is a side view for explaining the operation of the counterweight cover according to this embodiment. In this embodiment, a link mechanism 38 is provided in place of the hinge 28 described in the second embodiment.

  The link mechanism 38 includes an arm 34 that rotatably holds the cover 16 at one end, and an arm support member 36 that rotatably holds the other end of the arm 34. The arm support member 36 is attached to the cover attachment article 13g. Further, the link mechanism 38 includes an arm 37 with a cylinder. The cylinder-equipped arm 37 is rotatably connected to an intermediate portion of the arm 34 (a portion between one end and the other end of the arm 34) and is also rotatably connected to the arm support member 36.

  When performing maintenance work on the counterweight, the maintenance worker moves the cover 16 at the inspection location in a direction that does not overlap the adjacent cover 16, that is, in the upward direction. Here, in the present embodiment, the uppermost cover 16 is moved. However, for example, the lowermost cover 16 may be moved in a direction not overlapping with the adjacent cover 16, or a plurality of covers may be provided. It is also possible to move the second cover 16 in a direction that does not overlap the third cover 16 after moving the uppermost cover 16 out of 16, that is, in the direction of the uppermost cover 16. It becomes.

  According to the present embodiment, the moving direction of the cover 16 is a direction that does not overlap with the adjacent cover 16, so that the workability of the maintenance staff is improved when the maintenance staff works on the counterweight on the car, Moreover, it is not affected by the arrangement of the car 12 and the counterweight.

[Fourth Embodiment]
Next, a fourth embodiment will be described. FIG. 12 is a perspective view showing a state during the maintenance work of the counterweight in the present embodiment. In the present embodiment, a hinge 40 and a biasing means 42 are provided instead of the hinge 28 described in the second embodiment. Unlike the hinge 28 described in the second embodiment, the hinge 40 is not a mechanism that is fixed by a specified rotation angle.

  In the present embodiment, the urging means 42 includes a cylinder-equipped arm 48. The cylinder-equipped arm 48 includes a cylinder portion 46 and an arm 44 that is biased in a direction extending from the cylinder portion 46 by a spring member (not shown). One end of the cylinder-equipped arm 48 is attached to the cover 16, and the other end of the cylinder-equipped arm 48 is attached to the cover attachment 13g. In this embodiment, when the maintenance person opens the cover 16 and releases his / her hand from the cover 16, the rotation angle of the cover 16 is maintained in that state by the arm 48 with the cylinder.

  In the present embodiment, in addition to the effect achieved in the second embodiment, the biasing component 48 assists the moving operation of the cover 16, so that the workload of the maintenance staff is further reduced. Moreover, the structure of the hinge 40 is simple.

  In the present embodiment, the second embodiment has been described as a modified example. However, the biasing component 48 can be applied to the first embodiment and the third embodiment. The configuration of the biasing component 48 can be handled by existing products that are distributed. Further, it is possible to use a system that supports not only the spring member but also air pressure or hydraulic pressure.

[Fifth Embodiment]
Next, a fifth embodiment will be described. In the present embodiment, the cover 16 is made of a flame retardant material having a density lower than that of the steel material. As typical examples of steel materials, there are S45C and SS400. The density of these materials is about 7.8-7.9 / cm ³ . On the other hand, a typical material that can be cited as an example of a flame-retardant material having a low density is an aluminum alloy. Among them, A5052 is an Al—Mg non-heat-treatable alloy. As a feature of A5052, the density is 2.68 g / cm ^3, which is about one third of the steel material. It is an alloy in which A5052HA magnesium is added to improve strength and corrosion resistance. Among aluminum alloys, it has moderate strength and good weldability.

  In this embodiment, in addition to the effects exhibited in the first to fourth embodiments, the work load of the maintenance staff is further reduced by applying a flame retardant material having a lower density than the steel material as the material of the cover 16. The effect that it is done.

  Although some embodiments have been described above, these embodiments are presented as examples, and the scope of the invention is not intended to be limited to them. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 10 Elevator 13 Counterweight 13f Weight piece 13h Weight holding means 13k Cover holding means 16 Cover 16b Guide 23 Balance weight 28 Hinge 34 Arm 40 Hinge 42 Energizing means

Claims (4)

A counterweight used for elevators,
A plurality of weight pieces,
A weight holding means on which the weight piece is mounted;
A plurality of covers detachably attached to the weight holding means;
Cover holding means for holding the cover movably in a direction not overlapping the adjacent cover;
With
The cover holding means is a cover-side guide mounting article that is disposed in an inner part of the cover and away from the peripheral edge of the cover along the direction, and a guide that guides the cover-side guide mounting article in the direction. And having
The guide has a three-stage structure including a small guide, a middle guide, and a large guide, the small guide is fixed to the cover side guide mounting article, and the large guide is provided on the weight holding means along the vertical direction. A counterweight characterized by being fixed to a cover mounting article . The cover side guide mounting article is composed of an L-shaped member,
The counterweight according to claim 1, wherein a flat plate portion of the L-shaped member that is bent from the inside of the cover and projects toward the weight holding means is fixed to the small guide . The counterweight according to claim 1 , wherein the cover is made of a flame retardant material having a density lower than that of the steel material. The elevator provided with the counterweight of any one of Claims 1-3 .

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