JPH0940326A - Counterweight supporting jig for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively support and fix a counterweight even to a single use type weight guide rail with conventional simple mounting work. SOLUTION: A supporting body part 12 has a first protruding part 12a that can be inserted between a pair of leg parts of a weight guide rail of approximately π-shape cross section, and a pair of second protruding parts 12b, 12c holding the leg parts together with the first protruding part 12a. Cam type pressing members 14a, 14b are rotatably disposed at the second protruding parts 12b, 12c. The large radius side of cam faces 18a, 18b of the cam type pressing members 14a, 14b are pressed to both sides of the weight guide rail by the own weight of a counterweight hung from weight connecting parts 20a, 20b provided at the end parts of the cam type pressing members 14a, 14b. The supporting body part 12 is thereby fixed to the weight guide rail while holding the counterweight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight support jig for an elevator, and more particularly to an improvement of a counterweight support jig for holding the counterweight when replacing a main rope of an elevator.

[0002]

2. Description of the Related Art In the most widely used rope type elevator structure, a weight guide rail for guiding a counterweight is provided in parallel with a car guide rail for guiding a car on which people and luggage are to be lifted and lowered. Has been. The counterweight is engaged with the car via a main rope at a position facing each other, and when the car is raised, the counterweight is lowered. As a result, the engine that raises and lowers the car can be powered by the unbalanced weight between the car (including the weight to be loaded) and the counterweight and the power that withstands friction, and the elevator can operate efficiently and smoothly.

By the way, in order to smoothly operate the elevator, it is desirable to regularly replace the main rope connecting the car and the counterweight.

A conventional elevator is equipped with a brake device on a hoist for hoisting a main rope so that a car can be stopped and held at a predetermined position. Further, the car is provided with a brake device for maintaining the car stopped even when the brake device slips. However, in many cases, the balance weight side is not provided with a brake device such as a car. Therefore, a means for holding and stopping the counterweight at a desired position is required when replacing the main rope.

As shown in FIGS. 6 (a) and 6 (b), a weight guide rail 60 for guiding a conventional counterweight.
The a and 60b are made of steel material having a substantially U-shaped cross section. On the other hand, as shown in FIG. 7, the balance weight 62 stores a plurality of plate-like weights 66 in a weight frame 64 in a stacked manner, the main rope 69 is fixed to the upper frame 68, and both ends of the upper frame 68 are fixed. A guide shoe 70 that engages with the curved portion 61b of the weight guide rail 60b is fixed. Therefore,
The counterweight 62 slides along the two weight guide rails 60b while being guided by the guide shoe 70, and moves well.

As mentioned above, it is desirable to replace the main rope 69 periodically. When the main rope 69 is replaced, as shown in FIG. 7, the balance weight supporting jig 72 is fixed to the respective predetermined heights of the two weight guide rails 60b. The counterweight support jig 72 is a cam type pressing member 7.
2a. The cam type pressing member 72a presses the cam surface of the cam type pressing member 72a against the surface 61c of the weight guide rail 60b by its own weight of the counterweight 62 suspended via the chain 74, and thus the balance weight supporting jig 72 itself. Hold it fixed. The counterweight support jig 72 has a simple structure that utilizes the pressing force of the cam that operates by the weight of the counterweight 62, so that the counterweight 62 can be easily mounted and reliably held and fixed.

Accordingly, when the elevator main rope replacement work is performed, even if the brake device of the hoisting machine slips for some reason, the balance weight is stopped and held at a predetermined position, and the safe main rope 69 replacement work is performed. be able to.

By the way, in recent years, various improvements have been made to the weight guide rails for the purpose of simplifying the elevator structure, reducing the weight of structural parts, and reducing the cost. For example, the weight guide rail 76 shown in FIG. 8 has a cross section of approximately π.
It has a mold shape, guides the center of a counterweight (not shown), and guides the counterweight to move up and down with one guide rail. The weight guide rail 76 includes a pair of bent leg portions 76a and 76b and a flat portion 76c having left and right protruding portions. The guide shoe provided on the frame of the counterweight engages with the protrusion of the flat portion 76c, and the counterweight slides on the large surface of the flat portion 76c. As a result, the weight guide rail 76
Satisfactorily guides the counterweight in the same manner as the above-described weight guide rail 60b for guiding the counterweight from two sides, and realizes smooth movement of the counterweight.

[0009]

However, since the weight guide rail 76 which guides by one and the weight guide rail 60b which guides by two are largely different in the shape of the gap and the shape of the projection, the conventional balance is achieved. The weight support jig 72 cannot be attached to the weight guide rail 76. Further, the counterweight support jig 72 hangs the counterweight from the left and right, so it cannot be applied to the weight guide rail 76 used by one.

Therefore, there is a demand for a counterweight support jig which can be mounted on a single-use weight guide rail.

The present invention has been made in order to solve the above problems, and it is possible to reliably support and fix a counterweight even with a single-use weight guide rail by a simple mounting operation as in the conventional case. An object of the present invention is to provide a counterweight supporting jig that can be used.

[0012]

In order to achieve the above object, the present invention firstly engages with a guide rail having a pair of bent legs having a substantially π-shaped cross section for guiding a counterweight of an elevator. A balance weight support jig for holding the counterweight when replacing a main rope of an elevator, the first protrusion being insertable between a pair of leg portions of the guide rail, and arranged on both sides of the first protrusion. And a pair of second protrusions sandwiching the leg together with the first protrusion, and a support main body having a substantially E-shaped cross section, and rotating around a rotation shaft provided in each of the second protrusions. A pair of cam-type pressing members that are freely arranged, having a cam surface whose radius from the rotating shaft increases toward the one end side downwardly,
A cam type pressing member having a weight connecting portion for suspending the counterweight on the other end side, and a large radius side of the cam surface is provided by the weight of the counterweight suspended on the weight connecting portion of the cam type pressing member. It is characterized by pressing on both sides of the guide rail to hold the counterweight.

Here, the support main body portion has a first protrusion that can be inserted between a pair of leg portions of a guide rail having a substantially π-shaped cross section, and a pair of second protrusions that sandwich the leg portion together with the first protrusion portion. Since it has a section, the guide rail can be reliably supported. Further, the cam surface of the cam type pressing member is rotated from the lower side to the upper side by the self weight of the counterweight suspended on the weight connecting portion of the pair of cam type pressing members provided on each of the second protrusions. The large radius side of the lower end of the surface is pressed against both sides of the guide rail. The support body is fixed to the guide rail by the pressing force of the cam surface, and the counterweight is held.

The cam surface of the cam-type pressing member preferably has a shape that does not cause slippage between the cam surface and the guide rail when the guide rail is pressed, for example, an uneven shape or a gear shape. Secondly, the counterweight support jig is characterized in that it has a stopper that is fixed to the guide rail and abuts a lower portion of the support main body to support the support main body when mounted.

By providing the stopper, it is possible to support the supporting main body when mounting the supporting main body on the guide rail, and the mounting operation can be performed easily and quickly.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a counterweight support jig 10. The counterweight support jig 10 includes a support body 12 and a pair of cam type pressing members 14a and 14b. The support body 12 has a substantially E-shaped cross section, and is provided in a gap A between a pair of leg portions 76a and 76b of a weight guide rail 76 (see FIG. 8) that guides a counterweight by a single rod at a substantially central portion. It has a first protrusion 12a that can be inserted.
In addition, the first protrusions 12 are formed on both sides of the first protrusions 12a.
The second protrusions 12b and 12c, which are shorter than a, are formed. As shown in FIG. 2, the thickness T of the first protrusion 12a is preferably the same as or slightly smaller than the gap A between the legs 76a and 76b. This is the cam type pressing member 14
This is to prevent the weight guide rail 76 from being deformed when the weight guide rail 76 is pressed by a and 14b.

Further, cam type pressing members 14a and 14b are rotatably attached to the substantially central portions of the second protrusions 12b and 12c by a supporting means such as a bolt 16. Although it is preferable to dispose a bearing or the like at the rotating portions of the cam type pressing members 14a and 14b, the cam type pressing members 14a and 14b may be directly held by the bolts 16.

On one end side of the cam type pressing members 14a, 14b (the side contacting the leg portions 76a, 76b of the weight guide rail 76), the radius from the rotating shaft (bolt 16) increases as it goes downward. Cam surfaces 18a, 18b
have. In addition, the cam surface 18a is sandwiched by the rotating shaft.
A weight connecting portion 20a (20b) for suspending the counterweight is formed on the opposite side of (18b). In the case of this aspect, the weight connecting portion 20a (20b) is an opening that can be engaged with a chain for suspending the weight, but it may be a hook or the like. The cam surface 18a (18b) may have a shape in which the radius from the rotation axis simply increases as it goes downward,
In order to surely prevent the weight guide rail 76 from slipping, it is preferable to form a gear shape or an uneven shape on the cam surface.

The usage state of the counterweight support jig 10 configured as described above will be described with reference to FIGS. 3, 4 and 5. In mounting the counterweight support jig 10, first, the stoppers 22 having a substantially U-shaped cross section shown in FIG. 5 are mounted at predetermined positions of the leg portions 76a and 76b of the weight guide rail 76, respectively. The stopper 22 has a bolt 24, and a leg portion 76a is attached to the grip portion 22a of the stopper 22.
Insert (76b) and secure with bolts 24. At this time, it is desirable that the stoppers 22 are fixed to the legs 76a and 76b at the same height. The stopper 22 supports the lower end of the counterweight support jig 10 and holds it until the counterweight support jig 10 is completely fixed. Next, the weight connecting portions 20a, 20b of the cam type pressing members 14a, 14b of the counterweight supporting jig 10 are pushed up in the direction of arrow P in FIG. 3 to move the cam surfaces 18a, 18b to the first protruding portion 12a. The leg storages 12d and 12e formed between the two projections 12b and 12c are retracted. In this state, the support body 12 is attached from the leg portions 76a and 76b side of the weight guide rail 76 so that the counterweight support jig 10 is placed on the upper surface of the stopper 22.

Subsequently, as shown in FIG. 4, one end of the chain 26 engaged with the upper frame 52 of the counterweight 50 is engaged with the weight connecting portions 20a, 20b of the cam type pressing members 14a, 14b. In this state, the mounting of the counterweight support jig 10 is completed. That is, by releasing the engagement on the car side of the main rope or the engagement on the counterweight side, the weight connecting portions 20a, 20b side of the cam type pressing members 14a, 14b are moved by the weight of the counterweight 50 toward the arrow Q direction in FIG. The large radius side below the cam surfaces 18a and 18b presses the leg portions 76a and 76b of the weight guide rail 76 to fix and hold the balance weight supporting jig 10 itself. The configuration of the counterweight 50 is the counterweight 62 shown in FIG.
The guide shoe 56 holds a plurality of plate-like weights 54 inside the weight frame 52a and grips the flat portion 76c of the weight guide rail 76 from the left and right in the center of the upper frame 52. Are arranged.

When the counterweight support jig 10 is to be removed after the main rope replacement work, the car side of the elevator is slightly lowered and the counterweight 50 is slightly raised. By raising the counterweight 50, the tension of the chain 26 is lost and the cam type pressing member 14 can be easily
The weight connecting portions 20a and 20b of the a and 14b can be pushed up in the direction of arrow P in FIG. 3, and the fixation to the weight guide rail 76 can be released.

In a preferred form, the chain 26
The lengths of the left and right are the same, and the cam type pressing members 14a, 14
It is desirable to have the same load on b.

[0024]

According to the balance weight supporting jig for an elevator of the present invention, the support main body portion has a first projection portion which can be inserted between a pair of leg portions of a guide rail having a substantially π-shaped cross section, and the first projection portion. Since it has a pair of 2nd projection parts which pinch the above-mentioned leg part with a part, a guide rail can be supported certainly. In addition, the cam surface whose radius increases toward the lower side of the cam type pressing member due to the self weight of the counterweight suspended on the weight connecting portion of the pair of cam type pressing members provided on each of the second protrusions is lowered. From the side to the upper side, the large radius side of the cam surface is pressed against both sides of the guide rail, and the support body is fixed to the guide rail by the pressing force of the cam surface, and the counterweight is held.

Therefore, the balance weight supporting jig can be mounted on the one-use type weight guide rail by a simple mounting operation as in the conventional case, and the balance weight can be reliably supported and fixed.

Further, by mounting a stopper for supporting the counterweight supporting jig on the guide rail, the supporting main body is supported when the supporting main body is mounted on the guide rail, so that the mounting work is easy and quick. Can be done.

[Brief description of drawings]

FIG. 1 is a perspective view of a counterweight support jig for an elevator according to the present invention.

FIG. 2 is a top view showing a state in which a guide rail is mounted with a counterweight supporting jig for an elevator according to the present invention.

FIG. 3 is a front view showing a state where a balance rail supporting jig for an elevator according to the present invention is mounted on a guide rail.

FIG. 4 is an explanatory diagram illustrating a usage state of a counterweight supporting jig for an elevator according to the present invention.

FIG. 5 is a perspective view of a stopper of a counterweight supporting jig for an elevator according to the present invention.

FIG. 6 is a perspective view of a two-use guide rail.

FIG. 7 is an explanatory diagram illustrating a usage state of a counterweight support jig for a two-use guide rail.

FIG. 8 is a perspective view of a single-use guide rail.

[Explanation of symbols]

10 Counterweight support jig, 12 Support body, 12a
1st protrusion part, 12b, 12c 2nd protrusion part, 12d,
12e Leg storage part, 14a, 14b Cam type pressing member, 18a, 18b Cam surface, 20a, 20b Weight connection part, 22 Stopper, 26 Chain, 50 Counterweight, 76 Guide rail for weight.

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[Procedure amendment]

[Submission date] August 21, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction contents]

[0024]

According to the balance weight supporting jig for an elevator of the present invention, the support main body portion has a first projection portion which can be inserted between a pair of leg portions of a guide rail having a substantially π-shaped cross section, and the first projection portion. Since it has a pair of 2nd projection parts which pinch the above-mentioned leg part with a part, a guide rail can be supported certainly. In addition, the cam surface whose radius increases toward the lower side of the cam type pressing member due to the self weight of the counterweight suspended on the weight connecting portion of the pair of cam type pressing members provided on each of the second protrusions is lowered. From the side to the upper side, the large radius side of the cam surface is pressed against both sides of the guide rail, and the support body is fixed to the guide rail by the pressing force of the cam surface, and the counterweight is held.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (2)

[Claims] 1. A balance weight supporting jig that engages with a guide rail having a pair of bent legs having a substantially π-shaped cross section for guiding the balance weight of an elevator and holds the balance weight when the main rope of the elevator is replaced. A first protrusion that can be inserted between the pair of legs of the guide rail, and a pair of second protrusions that are arranged on both sides of the first protrusion and that sandwich the leg with the first protrusion. And a pair of cam-type pressing members rotatably arranged around a rotation shaft provided on each of the second protrusions.
A cam type pressing member having a cam surface whose radius from the rotating shaft increases toward the lower end on the one end side, and a weight connecting portion for suspending the counterweight on the other end side; A balance weight supporting jig for an elevator, characterized in that the balance weight is held by pressing the large radius side of the cam surface to both sides of the guide rail by the own weight of the balance weight suspended on the weight connecting portion of the die pressing member. 2. The balance weight supporting jig for an elevator according to claim 1, further comprising a stopper that is fixed to the guide rail and that abuts a lower portion of the support body portion to support the support body portion when mounted. Elevator balance weight support jig.