JP7097529B2 - Balanced weight device and loading method of balanced weight - Google Patents

Description

The present invention relates to a balanced weight device and a method for loading a balanced weight.

Patent Document 1 discloses an example of a counterweight weight device. The balancing weight device includes a frame and a side frame. The framework and side frames support the filler filled inside.

Japan Jitsusho 58-48306 Gazette

However, the balancing weight device of Patent Document 1 obtains the required weight by the filler poured from the upper filling port. Therefore, the amount of the filler that can be filled at one time is limited to the amount that passes through the filling port. In addition, the worker needs to hold the filling port at the position of the filling port until the filling is completed. Therefore, the filling operation of adding weight to the balance weight device requires a lot of labor and time.

The present invention has been made to solve such a problem. An object of the present invention is to provide a balancing weight device capable of easily loading a balancing weight and a method for loading the balancing weight.

The balance weight device according to the present invention has a balance weight, a framework that is rectangular when viewed from the front and supports the balance weight from below, and a balance weight that is provided on the front surface of the framework and has an upper end portion and a lower end portion. The lower end is provided with a front frame that supports the weight from the front, and the lower end of the frame is such that the front frame can rotate forward so that the front frame is inclined toward the frame from the top to the bottom. Supported, the front frame forms an opening between the upper end and the framework by rotating forward, supporting the counterweight loaded from the opening from the front.

The balancing weight device according to the present invention has a rectangular shape when viewed from the front, has a framework having a receiving portion that opens upward at the lower end portion, and a rotating shaft that protrudes laterally at the lower end portion, and the upper end portion has an upper end portion. It is equipped with a counterweight that is loaded onto the framework by mounting the rotating shaft on the receiving portion from above in a state of being tilted forward and then rotating the upper end portion backward around the rotating shaft.

The method for loading a balanced weight according to the present invention is a state in which a front frame provided on the front surface of a rectangular framework when viewed from the front and whose lower end is rotatably supported by the framework is inclined from above to below toward the framework. The opening process of forming an opening between the upper end of the front frame and the frame by rotating it forward, the loading process of loading a balanced weight from the opening, and the upper end of the front frame being rotated backward. It is equipped with a storage process that stores the balanced weight in the framework.

The method for loading the counterweight according to the present invention includes a lifting process in which the counterweight with the front frame assembled on the front surface is lifted with the upper end portion of the front frame tilted forward, and the balance weight is projected laterally at the lower end portion of the front frame. The rotation axis is placed on the receiving part of the rectangular frame at the lower end when viewed from the front, and the upper end of the front frame is rotated backward around the rotation axis to store the balance weight in the frame. It is equipped with a rotation process.

The method for loading a balanced weight according to the present invention is a lifting process in which the balanced weight is lifted with the upper end tilted forward, and a rotation axis protruding laterally at the lower end of the balanced weight is rectangular when viewed from the front. It includes a mounting process of mounting from above on a receiving portion of the lower end of the frame, and a rotating process of storing the upper end of the counterweight in the framework by rotating the upper end of the counterweight around the rotation axis.

According to the present invention, the balancing weight device comprises a balancing weight and a framework. The framework is rectangular when viewed from the front. The framework supports the balanced weight from below. The counterweight is loaded from the space in front of the upper end of the framework with the upper end tilted forward. The counterweight is housed in the framework by rotating the upper end backward. As a result, the balanced weight can be easily loaded.

It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a side view of the balance weight device which concerns on Embodiment 1. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 1. FIG. It is a side view of the balance weight device which concerns on Embodiment 2. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 2. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 2. FIG. It is a perspective view of the balance weight device which concerns on Embodiment 2. FIG. It is a side view of the balance weight device which concerns on Embodiment 3. FIG.

The embodiment for carrying out the present invention will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be appropriately simplified or omitted.

Embodiment 1.
1 and 2 are perspective views of the counterweight weight device according to the first embodiment. FIG. 3 is a side view of the counterweight weight device according to the first embodiment.

The balance weight device 1 of FIG. 1 is applied to an elevator. Elevators are installed in buildings with multiple floors. The elevator includes a basket (not shown), a main rope 2, and so on. The counterweight weight device 1 and the basket are provided on a hoistway that penetrates a plurality of floors of the building. A car is a device that transports passengers and the like by moving up and down between multiple floors of a building. One end of the main rope 2 is provided in a basket, for example. The other end of the main rope 2 is provided in, for example, a counterweight weight device 1. The main rope 2 is wound around a hoist (not shown). The main rope 2 is a device that raises and lowers the car by the power generated by the hoist. The balancing weight device 1 is a device that balances the load due to the weight of the car applied to one side of the hoisting machine through the main rope 2 with the load applied to the other side of the hoisting machine.

The balancing weight device 1 includes a balancing weight 3, a framework 4, a rear frame 5, and a front frame 6.

The balance weight 3 is a device that gives weight to the balance weight device 1. The balance weight 3 is, for example, one or a plurality of heavy objects. The balance weight 3 may be a plurality of weight pieces laminated in the vertical direction. FIG. 1 shows a balance weight device 1 in a state where the balance weight 3 is loaded.

The framework 4 is a device that supports the balance weight 3. The shape of the framework 4 is rectangular when viewed from the front. The framework 4 includes an upper frame 7, a pair of vertical frames 8, and a lower frame 9. The upper frame 7 forms the upper surface of the framework 4. The end of the main rope 2 is attached to, for example, the upper frame 7. The pair of vertical frames 8 form a side surface of the framework 4. Each of the pair of vertical frames 8 supports the side surface of the counterweight. The upper ends of each of the pair of vertical frames 8 are connected to the upper frame 7. Each of the pair of vertical frames 8 is provided with a rail guide 10 on the outer surface. The rail guide 10 is a device that guides the counterweight 3 so as to move up and down along a guide rail (not shown) as the car moves up and down. The lower frame 9 forms the lower surface of the framework 4. The lower frame 9 is connected to each of the pair of vertical frames 8. The lower frame 9 supports the balance weight 3 from below.

The rear frame 5 is provided on the rear surface of the framework 4. The rear frame 5 supports the left and right ends of the balance weight 3 from the rear.

The front frame 6 is provided in front of the framework 4. The front frame 6 is provided inside the framework 4 when viewed from the front. The front frame 6 supports the left and right ends of the counterweight weight 3 from the front. The front frame 6 has an opening 11 on the front surface. In this example, the counterweight 3 projects forward from the opening 11. The front frame 6 has a beam 12 at the upper end. The beam 12 is a member hung on the left and right above the opening 11. The beam 12 is a member that secures the rigidity of the front frame 6.

The front frame 6 includes a rotating shaft 13. The rotation shaft 13 extends in the left-right direction. The rotating shaft 13 is provided on the front side of the lower end portion of the front frame 6. The rotating shaft 13 projects on both the left and right sides. The front frame 6 is rotatably supported by the framework 4 about the rotation shaft 13.

Here, in FIG. 1, the straight line L is a straight line perpendicular to the axis of rotation 13. The straight line L passes through the center of gravity G1 of the balance weight 3 housed in the framework 4. The straight line L forms an acute angle θ1 with the vertical direction.

FIG. 2 shows a counterweight device 1 in a state where the upper end portion of the front frame 6 is rotated forward. In FIG. 2, the counterweight weight 3 is not shown.

When the upper end portion of the front frame 6 rotates forward, an opening 14 is formed between the front frame 6 and the frame 4. The opening 14 is formed between the front end of the upper frame 7 and the beam 12. The opening 14 opens upward.

The counterweight weight device 1 includes a pair of limiting portions 15. The limiting portion 15 is a portion that limits the rotation angle of the front frame 6 within the opening angle θ2. The opening angle θ2 is, for example, an upper limit angle preset in the range of an acute angle. The opening angle θ2 is set to, for example, an angle larger than the acute angle θ1. The limiting unit 15 is, for example, a link mechanism including a plurality of links. Multiple links are rotatably connected to each other. A plurality of links are provided between the vertical frame 8 and the front frame 6.

The limiting unit 15 includes a rear link 16 and a front link 17. The rear end of the rear link 16 is rotatably attached to the inner surface of the vertical frame 8. The distance from the upper frame 7 at the position where the rear link 16 is attached is shorter than the length of the rear link 16. The front end of the front link 17 is rotatably attached to the side surface of the front frame 6. The front link 17 includes a joint 18 at the rear end. The joint 18 rotatably connects the front end of the rear link 16. The joint 18 has a hanging hole in the center. The hanging hole is a part where the pulling tool is hung. The pulling tool is a tool for pulling up the joint 18. The joint 18 is an example of the first hook. The limiting unit 15 may be, for example, a link mechanism including three or more links. At this time, a part or all of the three or more links may be provided with, for example, a first hook having a hook hole.

The upper frame 7 has a pair of slits 19 that open toward the front. One of the pair of slits 19 is provided above the position where one of the pair of limiting portions 15 is attached to the vertical frame 8. The other of the pair of slits 19 is provided above the position where the other of the pair of limiting portions 15 is attached to the vertical frame 8.

As shown in FIG. 3, the counterweight weight 3 includes an eyebolt 20. The eyebolt 20 is a portion on which a hanging tool is hung. The hanging tool is a tool for lifting the balance weight 3 upward. The eyebolt 20 is an example of a second hook. The eyebolt 20 is provided behind the upper surface. The eyebolt 20 is provided, for example, behind the plane P1 shown in FIG. The plane P1 is a plane rotated backward by an opening angle θ2 from the vertical direction. The plane P1 passes through the center of gravity G1.

Subsequently, a method of loading the balance weight 3 in the balance weight device 1 will be described with reference to FIGS. 4 to 7.
4 to 7 are perspective views of the counterweight weight device according to the first embodiment.

The loading method according to the first embodiment includes an opening step, a loading step, and a storage step.

In the opening step, the worker performing the loading operation rotates the upper end portion of the front frame 6 forward about the rotation shaft 13 as shown in FIG. As a result, an opening 14 is formed between the front frame 6 and the framework 4. At this time, the limiting unit 15 limits the rotation angle of the front frame 6 within the opening angle θ2. The worker rotates the front frame 6 up to the upper limit opening angle θ2.

Next, the worker performs the work of the loading process. The loading process includes a lifting process and a unloading process.

The worker performs the work of the lifting process. In this example, the worker uses the chain block 21 as a hanger. The worker hangs the hook of the chain block 21 on the eyebolt 20. Next, the worker lifts the balance weight 3 by the chain block 21. Since the eyebolt 20 is provided behind the upper surface, the upper end portion of the counterweight weight 3 is lifted with its upper end tilted forward. At this time, the angle between the front surface of the balance weight 3 and the vertical surface is larger than the opening angle θ2.

Next, the worker performs the work of the hanging process. The worker suspends the tilted and lifted balance weight 3 from the opening 14 to the framework 4 and the front frame 6. At this time, since the upper end portion of the balance weight 3 is tilted forward, the chain block 21 which is a hanging tool does not interfere with the upper frame 7. Further, since the angle between the front surface of the balance weight 3 and the vertical surface is larger than the opening angle θ2, the front surface of the balance weight 3 is located below the center of gravity G1 when it comes into contact with the front frame 6. Therefore, the counterweight 3 is loaded with the front surface tilted along the front frame 6.

Since the opening angle θ2 is set to an angle larger than the angle θ1, the center of gravity G1 of the balance weight 3 loaded so as to be inclined along the front surface of the front frame 6 is located in front of the rotation axis 13. Therefore, the balance weight 3 maintains a tilted state due to its own weight.

Next, the worker performs the work of the storage process. The storage process includes a pull-up process. In the example shown in FIG. 5, the worker uses the ring 22 and the chain block 23 as the pulling tool.

The worker performs the work of the pulling process. The worker passes the ring 22 through the hanging hole of the joint 18. In this example, the worker passes the ring 22 through the hanging hole of one of the joints 18 of the pair of limiting portions 15. The worker hangs the hook of the chain block 23 on the ring 22. After that, the worker removes the hook of the chain block 21 hanging on the eyebolt 20 from above. The worker rehangs the hook of the chain block 21 on the eyebolt 20 from the front through the opening 11. Next, the worker pulls up the joint 18 by the chain block 23 and the ring 22. The rear link 16 and the front link 17 bend upward at the joint 18. The limiting portion 15 rotates the upper end portion of the front frame 6 backward. When the center of gravity G1 of the counterweight 3 moves backward from the rotation shaft 13 due to rotation, the weight of the counterweight 3 acts in the direction of rotating the counterweight 3 backward. At this time, the worker pulls up the joint 18 while gradually loosening the chain block 21 so that the balance weight 3 does not suddenly rotate due to its own weight.

The worker pulls up the joint 18 until the counterweight 3 is housed in the framework 4, as shown in FIG. At this time, since the rear link 16 is attached to the vertical frame 8 at a position where the distance from the upper frame 7 is shorter than the length of the rear link 16, the rear link 16 enters the slit 19 of the upper frame 7 from the front. At this time, the joint 18 is located above the upper frame 7. Therefore, the joint 18 is pulled up until the balance weight 3 is housed in the framework 4 while the hook of the chain block 23 is hooked.

Next, the worker fixes the front frame 6 to the framework 4 by, for example, fastening.

Then, as shown in FIG. 7, the worker removes the hook of the chain block 21 from the eyebolt 20. The worker removes the hook of the chain block 23 from the ring 22. The worker removes the ring 22 from the hanging hole.

As described above, the balancing weight device 1 according to the first embodiment includes a balancing weight 3, a framework 4, and a front frame 6. Framework 4 has a rectangular shape when viewed from the front. Framework 4 supports the counterweight weight 3 from below. The front frame 6 is provided in front of the framework 4. The lower end of the front frame 6 is supported by the framework 4 so that the upper end can rotate forward. The front frame 6 forms an opening 14 upward with the frame 4 by the rotation of the upper end portion. The front frame 6 supports the balance weight 3 loaded from the opening 14 from the front.

Further, the loading method of the balance weight 3 according to the first embodiment includes an opening step, a loading step, and a storage step. In the opening step, the worker rotates the upper end portion of the front frame 6 forward to form the opening 14. The opening 14 opens upward between the front frame 6 and the framework 4. The lower end of the front frame 6 is rotatably supported by the framework 4. The front frame 6 is provided in front of the framework 4. The framework 4 has a rectangular shape when viewed from the front. In the loading process, the worker loads the balance weight 3 from the opening 14. In the storage process, the worker rotates the upper end portion of the front frame 6 backward to store the balance weight 3 in the frame 4.

Generally, the weight required for the counterweight device is about twice the load weight of the elevator. For example, in an elevator that seats 15 people and has a loading weight of 1000 kg, the weight required for the balance weight device is 2000 kg. Since the hoistway where the balancing weight device is installed is a narrow space, workers cannot use a large device for loading work. Therefore, the counterweight is divided into, for example, a plurality of weight pieces so that the loading work can be performed manually. The weight of one weight piece is a weight that can be handled by hand. The weight of one weight piece is, for example, 20 kg. In this case, the balanced weight that requires a weight of 2000 kg is divided into 100 weight pieces. Here, the balance weight is supported by the framework from all sides, front, back, left, and right to prevent it from falling off. For this reason, the counterweight is loaded from, for example, a notch provided at the top of the framework. Therefore, since it is necessary to lift and load 100 balanced weight pieces weighing 20 kg up to the notch at the top of the framework, loading the balanced weights by such a method requires a lot of labor and time. .. Further, the balance weight device is often provided at a position away from the landing entrance / exit leading to the landing. In addition, the loading work is often performed in a pit at the lower end of the hoistway where there is a height difference between the landing entrance and the entrance. For this reason, the weight pieces may be transported by being handed over sequentially among a plurality of workers. At this time, the work of transporting the weight piece requires a lot of labor, time and the number of workers.

On the other hand, in the balancing weight device 1 according to the first embodiment, the balancing weight 3 is loaded from the opening 14 formed by the front frame 6 rotating forward. Since there is no object to interfere with the front, the counterweight device 1 can form an opening 14 wide open in front of the upper end of the framework 4. Therefore, the worker can load a large balance weight 3 that does not pass through a notch or the like at a time. Further, since the opening 14 opens in front of the upper frame 7, the worker can suspend the balance weight 3 by using the hanging tool without interfering with the upper frame 7. Therefore, the worker can load the balance weight 3 having a weight that cannot be handled by hand at a time. Further, even a worker who is not strong can easily perform the loading work by using the hanging tool. The upper end of the loaded balance weight 3 is tilted forward. The balanced weights 3 loaded at an angle are collectively stored in the framework 4 by rotating backward together with the front frame 6. As a result, the worker can easily load the balance weight 3.

Further, the balancing weight device 1 includes a limiting portion 15. The limiting portion 15 limits the rotation angle of the upper end portion of the front frame 6 to a range up to an acute angle θ2.

As a result, in the loading operation of the balance weight 3, a support tool for supporting the front frame 6 rotated forward is not required separately. Further, the limiting portion 15 supports the front frame 6 in a state of being inclined toward the framework 4 from above to below. As a result, the front frame 6 guides the balanced weight 3 to be loaded to the framework 4. As a result, the worker can more easily load the balance weight 3.

Further, the limiting unit 15 includes a plurality of links. Multiple links are rotatably connected to each other. The plurality of links are provided between the framework 4 and the front frame 6. At least one of the plurality of links comprises a first hook. The first hook is a part on which a pull-up tool for pulling up the link is hung.

Further, the storage process includes a pulling process. In the pulling process, the worker hangs the pulling tool on the first hook. The first hook is provided on any of the plurality of links. Multiple links are rotatably connected to each other. The plurality of links are provided between the framework 4 and the front frame 6. Next, the worker pulls up the link provided with the first hook on which the pull-up tool is hung by the pull-up tool, thereby rotating the upper end portion of the front frame 6 backward.

The front frame 6 in a state of being rotated forward supports the weight of the counterweight 3 that is tilted and loaded. Therefore, in order to store the balance weight 3 in the framework 4, it is necessary to rotate the front frame 6 backward while resisting the weight of the balance weight 3. At this time, the worker rotates the front frame 6 backward by pulling up the limiting portion 15 using a pulling tool. Therefore, even if the balance weight 3 having a weight that cannot be handled by hand is loaded, the worker can store the balance weight 3 in the framework 4 by the pulling tool. Further, the limiting portion 15 is provided on the left and right side surfaces of the front frame 6. Therefore, the pulling tool does not interfere with, for example, the main rope 2.

Further, the framework 4 has a slit 19 on the upper surface. The slit 19 opens toward the front. The slit 19 is provided above the position where the limiting portion 15 is provided.

With the counterweight 3 housed in the framework 4, at least a portion of the limiting portion 15 is located below the top surface of the framework 4. The pulling portion moves upward from the front of the framework 4 as the limiting portion 15 is pulled up. At this time, the pulling portion or the limiting portion 15 enters the slit 19 from the front. The pulling portion pulls up the limiting portion 15 from above the framework 4 through the slit 19. As a result, the worker can use the pulling tool without the need for replacement or the like until the balance weight 3 is housed in the framework 4. As a result, the worker can more easily load the balance weight 3.

Further, the balance weight 3 is provided with a second hook. The second hook is provided behind the plane P1. The plane P1 passes through the center of gravity G1. The plane P1 is a plane rotated backward by an opening angle θ2 from the vertical direction. The hanger that lifts the balance weight 3 is a portion that can be hung on the second hanger.

The balance weight 3 is hung by the hanging tool with the upper end portion tilted forward. As a result, the hanger is less likely to interfere with the upper frame 7. Further, since the angle between the front surface of the balance weight 3 and the vertical surface is larger than the opening angle θ2, the front surface of the balance weight 3 is located below the center of gravity G1 when it comes into contact with the front frame 6. Therefore, the counterweight 3 is loaded with the front surface tilted along the front frame 6. This facilitates the fishing of the balance weight 3.

The front frame 6 does not have to have the beam 12 above the opening 11 as long as sufficient rigidity can be secured. At this time, the worker does not need to rehang the chain block 21 in the pulling process.

Further, the rear frame 5 may have the same mechanism as the front frame 6. That is, the rear frame 5 may form an opening 11 between the frame 4 and the rear frame 5 by rotating backward.

Embodiment 2.
In the second embodiment, the differences from the examples disclosed in the first embodiment will be described in detail. As for the features not described in the second embodiment, any of the features disclosed in the first embodiment may be adopted.

FIG. 8 is a side view of the counterweight weight device according to the second embodiment.
FIG. 8 shows the balance weight device 1 before the balance weight 3 is loaded.

Before the balance weight 3 is loaded, the front frame 6 is integrally assembled with the balance weight 3. The limiting unit 15 is removed from the framework 4 and the front frame 6.

The framework 4 has a receiving portion 24 inside on both left and right side surfaces. The receiving portion 24 is provided on the front side of the lower end portion. The receiving portion 24 is, for example, a groove that opens upward.

The balance weight 3 includes an eyebolt 20. The eyebolt 20 is a portion on which a hanging tool is hung. The eyebolt 20 is an example of a second hook. The eyebolt 20 is provided behind the upper surface. The eyebolt 20 is provided, for example, behind the plane P2. The plane P2 is a plane including the rotation axis 13. The plane P2 passes through the composite center of gravity G2 of the balance weight 3 and the front frame 6. The synthetic center of gravity G2 is the center of gravity of the system in which the balance weight 3 and the front frame 6 are combined. The angle between the plane P2 and the vertical plane is an acute angle θ3.

Subsequently, a method of loading the balance weight 3 in the balance weight device 1 will be described with reference to FIGS. 9 to 11.
9 to 11 are perspective views of the counterweight weight device according to the second embodiment.

The loading method according to the second embodiment includes a lifting step, a loading step, and a rotation step.

In the lifting process, the worker uses the chain block 21 shown in FIG. 9 as a lifting tool. The worker hangs the hook of the chain block 21 on the eyebolt 20. At this time, the front frame 6 is integrally assembled with the balance weight 3. Next, the worker lifts the balance weight 3 by the chain block 21. The front frame 6 is lifted together with the balance weight 3. Since the eyebolt 20 is provided behind the upper surface, the upper end portion of the counterweight weight 3 is lifted with its upper end tilted forward. At this time, the front surfaces of the counterweight weight 3 and the front frame 6 rotate more than the angle θ3 from the vertical plane. Therefore, the rotating shaft 13 is located behind the hanger.

Next, the worker performs the work of the loading process. As shown in FIG. 10, the worker places the rotating shaft 13 of the front frame 6 assembled to the counterweight weight 3 on both the left and right receiving portions 24 of the framework 4 from above. The receiving portion 24 rotatably supports the rotating shaft 13 of the front frame 6. At this time, since the upper end portion of the balance weight 3 is tilted forward, the chain block 21 which is a hanging tool does not interfere with the upper frame 7.

Next, the worker performs the work of the rotation process. The rotation process includes a mounting process and a pulling process.

Workers perform the work of the mounting process. As shown in FIG. 11, the worker attaches the limiting portion 15 between the framework 4 and the front frame 6.

Next, the worker performs the work of the pulling process. The worker passes the ring 22 through the hanging hole. The worker hangs the hook of the chain block 23 on the ring 22. After that, the worker removes the hook of the chain block 21 hanging on the eyebolt 20 from above. The worker rehangs the hook of the chain block 21 on the eyebolt 20 from the front through the opening 11. Next, the worker pulls up the joint 18 by the chain block 23 and the ring 22. The rear link 16 and the front link 17 bend upward at the joint 18. The limiting portion 15 rotates the front frame 6 backward. When the combined center of gravity G2 of the counterweight 3 and the front frame 6 moves rearward from the rotation shaft 13 due to rotation, the weight of the counterweight 3 acts in the direction of rotating the counterweight 3. At this time, the worker pulls up the joint 18 while gradually loosening the chain block 21 so that the balance weight 3 does not suddenly rotate due to its own weight.

The worker pulls up the joint 18 until the counterweight 3 is housed in the framework 4. At this time, since the rear link 16 is attached to the vertical frame 8 at a position where the distance from the upper frame 7 is shorter than the length of the rear link 16, the rear link 16 enters the slit 19 of the upper frame 7 from the front. At this time, the joint 18 is located above the upper frame 7. Therefore, the joint 18 is pulled up until the balance weight 3 is housed in the framework 4 while the hook of the chain block 23 is hooked.

After that, the worker fixes the front frame 6 to the framework 4 by, for example, fastening.

After that, the worker removes the hook of the chain block 21 from the eyebolt 20. The worker removes the hook of the chain block 23 from the ring 22. The worker removes the ring 22 from the hanging hole.

As described above, the loading method of the balance weight 3 according to the second embodiment includes a lifting step, a loading step, and a rotation step. In the lifting process, the worker lifts the counterweight 3 to which the front frame 6 is assembled on the front surface in a state where the upper end portion of the front frame 6 is tilted forward. In the mounting process, the worker mounts the rotating shaft 13 on the receiving portion 24 from above. The rotating shaft 13 projects laterally at the lower end of the front frame 6. The receiving portion 24 is provided at the lower end portion of the framework 4. The framework 4 has a rectangular shape when viewed from the front. In the rotation process, the worker rotates the upper end portion of the front frame 6 backward around the rotation shaft 13 to store the balance weight 3 in the framework 4.

The balance weight 3 is suspended in a state of being tilted forward. Therefore, the balance weight 3 can be hung in front of the upper end portion of the framework 4. The worker can suspend the balance weight 3 by using the suspending tool without interfering with the upper frame 7. Further, the front frame 6 is assembled to the balance weight 3. Therefore, the worker can integrally handle the balance weight 3 and the front frame 6 having a weight that cannot be handled manually by the hanging tool. Therefore, even a worker who does not have a strong force can easily perform the loading work by using the hanging tool. The upper end of the loaded balance weight 3 is tilted forward. The balanced weights 3 loaded at an angle are collectively stored in the framework 4 by rotating backward together with the front frame 6. As a result, the worker can easily load the balance weight 3.

Further, the front frame 6 has a rotation shaft 13. The rotating shaft 13 projects laterally at the lower end. Framework 4 has a receiving portion 24. The receiving portion 24 rotatably supports the front frame 6 by receiving the rotating shaft 13 detachably from above.

The worker can form a wide opening 11 on the front surface of the framework 4 by removing the front frame 6. The worker can easily load the balance weight 3 from the front of the framework 4.

Further, the front frame 6 is integrally assembled with the balance weight 3.

As a result, the worker can simultaneously attach the front frame 6 and load the balance weight 3. Further, the work of rotating the front frame 6 forward to open the opening 14 becomes unnecessary. Therefore, the work load of the loading work of the balance weight 3 is lightened.

The balance weight 3 is provided with a second hook. The second hook is provided behind the plane P2. The plane P2 passes through the composite center of gravity G2 of the balance weight 3 and the front frame 6. The plane P2 includes a rotation axis 13. The hanging tool for lifting the balance weight 3 is hung on the second hanging tool.

Further, in the lifting process, the balance weight 3 is lifted by the hanging tool hung on the second hanging tool. The second hook is provided behind the plane P2. The plane P2 passes through the composite center of gravity G2 of the balance weight 3 and the front frame 6. The plane P2 includes a rotation axis 13.

The balance weight 3 is hung by the hanging tool with the upper end portion tilted forward. As a result, the hanger is less likely to interfere with the upper frame 7. At this time, since the front surfaces of the balance weight 3 and the front frame 6 are rotated by an angle θ3 from the vertical plane, the rotation shaft 13 is located near the frame 4 behind the hanger. Therefore, the rotating shaft 13 can be easily mounted on the receiving portion 24 from above. This facilitates the loading of the balance weight 3.

Further, the rotation process includes a mounting process and a pulling process. In the mounting process, the worker attaches a plurality of links across the framework 4 and the front frame 6. Multiple links are rotatably connected to each other. In the pulling process, the worker hangs the pulling tool on one of the first hooks of the plurality of links. Next, the worker pulls up the link with a pulling tool to rotate the upper end portion of the front frame 6 backward.

In order to store the balanced weight 3 in a state of being rotated forward in the framework 4, it is necessary to rotate the front frame 6 backward while resisting the weight of the balanced weight 3. At this time, the worker attaches the limiting portion 15 to the front frame 6 suspended together with the balancing weight 3. The worker rotates the front frame 6 backward by pulling up the limiting portion 15 using the attached pulling tool. Therefore, even if the balance weight 3 having a weight that cannot be handled by hand is loaded, the worker can store the balance weight 3 in the framework 4 by the pulling tool. Further, the limiting portion 15 is provided on the left and right side surfaces of the front frame 6. Therefore, the pulling tool does not interfere with, for example, the main rope 2.

Embodiment 3.
In the third embodiment, the differences from the examples disclosed in the first embodiment and the second embodiment will be described in detail. As for the features not described in the third embodiment, any of the features of the examples disclosed in the first embodiment or the second embodiment may be adopted.

FIG. 12 is a side view of the balance weight device according to the third embodiment.
In FIG. 12, the balancing weight device 1 before the balancing weight 3 is loaded is shown.

Before the balance weight 3 is loaded, the front frame 6 is removed from the framework 4. The front frame 6 may be integrally assembled with the balance weight 3.

The balance weight 3 includes a rotation shaft 13. The rotation shaft 13 extends in the left-right direction. The rotation shaft 13 is provided on the front side of the lower end portion of the balance weight 3. The rotating shaft 13 projects on both the left and right sides.

The balance weight 3 includes an eyebolt 20. The eyebolt 20 is a portion on which a hanging tool for lifting upward is hung. The eyebolt 20 is an example of a second hook. The eyebolt 20 is provided behind the upper surface. The eyebolt 20 is provided behind the plane P3. The plane P3 is a plane including the rotation axis 13. The plane P3 passes through the center of gravity G1 of the balance weight 3. The angle between the plane P3 and the vertical plane is an acute angle θ4.

The counterweight weight device 1 includes a pair of limiting portions 15. The limiting portion 15 is a portion that limits the rotation angle of the balance weight 3 within the opening angle θ2. The limiting portion 15 can be attached and detached. In FIG. 12, the limiting portion 15 is removed from the framework 4 and the counterweight 3. The limiting portion 15 is detachably attached to the inside of the framework 4. The limiting portion 15 is detachably attached to the left and right side surfaces of the balance weight 3. The restriction unit 15 is, for example, a link mechanism including a plurality of links disclosed in the first embodiment.

Subsequently, a method of loading the balance weight 3 in the balance weight device 1 will be described.

The loading method according to the third embodiment includes a lifting step, a loading step, and a rotation step.

In the lifting process, the worker uses the chain block 21 as a lifting tool. The worker hangs the hook of the chain block 21 on the eyebolt 20. Next, the worker lifts the balance weight 3 by the chain block 21. Since the eyebolt 20 is provided behind the upper surface, the upper end portion of the counterweight weight 3 is lifted with its upper end tilted forward. At this time, the front surface of the balance weight 3 is rotated at an angle θ4 larger than the vertical plane. Therefore, the rotating shaft 13 is located behind the hanger.

Next, the worker performs the work of the loading process. The worker puts the rotating shaft 13 of the balance weight 3 on both the left and right receiving portions 24 of the framework 4 from above. The receiving portion 24 rotatably supports the rotating shaft 13 of the counterweight weight 3. At this time, since the upper end portion of the balance weight 3 is tilted forward, the chain block 21 which is a hanging tool does not interfere with the upper frame 7.

Next, the worker performs the work of the rotation process. The rotation process includes a mounting process and a pulling process.

Workers perform the work of the mounting process. The worker attaches the limiting portion 15 between the framework 4 and the counterweight weight 3.

Next, the worker performs the work of the pulling process. The worker passes the ring 22 through the hanging hole. The worker hangs the hook of the chain block 23 on the ring 22. After that, for example, when the front frame 6 is assembled to the counterweight weight 3, the worker removes the hook of the chain block 21 hanging on the eyebolt 20 from above. The worker rehangs the hook of the chain block 21 on the eyebolt 20 from the front through the opening 11. Next, the worker pulls up the joint 18 of the limiting portion 15 by the chain block 23 and the ring 22. The rear link 16 and the front link 17 of the limiting portion 15 bend upward at the joint 18. The limiting portion 15 rotates the counterweight weight 3 backward. When the center of gravity G1 of the equilibrium weight 3 moves rearward from the rotation shaft 13 due to rotation, the weight of the equilibrium weight 3 acts in the direction of rotating the equilibrium weight 3. At this time, the worker pulls up the joint 18 while gradually loosening the chain block 21 so that the balance weight 3 does not suddenly rotate due to its own weight.

The worker pulls up the joint 18 until the counterweight 3 is housed in the framework 4. At this time, since the rear link 16 is attached to the vertical frame 8 at a position where the distance from the upper frame 7 is shorter than the length of the rear link 16, the rear link 16 enters the slit 19 of the upper frame 7 from the front. At this time, the joint 18 is located above the upper frame 7. Therefore, the joint 18 is pulled up with the hook of the chain block 23 hooked until the balance weight 3 is housed in the framework 4.

After that, the worker fixes the front frame 6 to the framework 4 by, for example, fastening. After that, the worker removes the hook of the chain block 21 from the eyebolt 20. The worker removes the hook of the chain block 23 from the ring 22. The worker removes the ring 22 from the hanging hole.

For example, when the front frame 6 is not attached to the counterweight weight 3, the worker may attach the front frame 6 from the front after removing the pulling tool and the hanging tool from the counterweight weight 3.

As described above, the balancing weight device 1 according to the third embodiment includes a framework 4 and a balancing weight 3. Framework 4 has a rectangular shape when viewed from the front. The framework 4 has a receiving portion 24 that opens upward at the lower end portion. The counterweight 3 has a rotating shaft 13 that projects laterally at the lower end. The balance weight 3 is loaded onto the framework 4 by mounting the rotating shaft 13 on the receiving portion 24 from above with the upper end portion tilted forward and then rotating the upper end portion rearward around the rotating shaft 13.

Further, the loading method of the balance weight 3 according to the third embodiment includes a lifting step, a loading step, and a rotation step. In the lifting process, the worker lifts the balance weight 3 with the upper end portion tilted forward. In the mounting process, the worker mounts the rotating shaft 13 on the receiving portion 24 from above. The rotating shaft 13 projects laterally at the lower end of the balance weight 3. The receiving portion 24 is provided at the lower end portion of the framework 4. The framework 4 has a rectangular shape when viewed from the front. In the rotation process, the worker rotates the upper end portion rearward around the rotation shaft 13 to store the balance weight 3 in the framework 4.

The balance weight 3 is suspended in a state of being tilted forward. Therefore, the balance weight 3 can be hung in front of the upper end portion of the framework 4. The worker can suspend the balance weight 3 by using the suspending tool without interfering with the upper frame 7. As a result, the worker can integrally handle the balance weight 3 having a weight that cannot be handled manually by the hanging tool. Therefore, even a worker who does not have a strong force can easily perform the loading work by using the hanging tool. The upper end of the loaded balance weight 3 is tilted forward. The balanced weights 3 loaded at an angle are collectively stored in the framework 4 by rotating backward. As a result, the worker can easily load the balance weight 3.

Further, the balancing weight device 1 includes a limiting portion 15. The limiting portion 15 limits the rotation angle of the upper end portion of the counterweight weight 3 to a range up to an acute opening angle θ2.

As a result, for example, in the case of changing the hanging tool, a support tool for supporting the counterweight 3 rotated forward is not required separately.

Further, the limiting unit 15 includes a plurality of links. Multiple links are rotatably connected to each other. The plurality of links are detachably provided between the framework 4 and the counterweight 3. At least one of the links is the part on which the pull-up tool that pulls up the link is hung.

Further, the rotation process includes a mounting process and a pulling process. In the mounting process, the worker attaches a plurality of links between the framework 4 and the counterweight 3. Multiple links are rotatably connected to each other. In the pulling process, the worker hangs the pulling tool on one of the first hooks of the plurality of links. Next, the worker pulls up the link with a pulling tool to rotate the upper end portion of the balance weight 3 backward.

In order to store the balanced weight 3 in the state of being rotated forward in the framework 4, it is necessary to rotate the balanced weight 3 backward while resisting the weight of the balanced weight 3. At this time, the worker attaches the limiting portion 15 to the balancing weight 3. The worker rotates the counterweight weight 3 backward by pulling up the limiting portion 15 using the attached pull-up tool. Therefore, even if the balance weight 3 having a weight that cannot be handled by hand is loaded, the worker can store the balance weight 3 in the framework 4 by the pulling tool. Further, the limiting portion 15 is provided on the left and right side surfaces of the balance weight 3. Therefore, the pulling tool does not interfere with, for example, the main rope 2.

Further, the framework 4 has a slit 19 on the upper surface. The slit 19 opens toward the front. The slit 19 is provided above the position where the limiting portion 15 is provided.

With the counterweight 3 housed in the framework 4, at least a portion of the limiting portion 15 is located below the top surface of the framework 4. The pulling portion moves upward from the front of the framework 4 as the limiting portion 15 is pulled up. At this time, the pulling portion or the limiting portion 15 enters the slit 19 from the front. The pulling portion pulls up the limiting portion 15 from above the framework 4 through the slit 19. As a result, the worker can use the pulling tool without the need for replacement or the like until the balance weight 3 is housed in the framework 4. As a result, the worker can more easily load the balance weight 3.

The balance weight 3 is provided with a second hook. The second hook is provided behind the plane P3. The plane P3 passes through the center of gravity G1 of the balance weight 3. The plane P3 includes a rotation axis 13. The hanging tool for lifting the balance weight 3 is hung on the second hanging tool.

Further, in the lifting process, the balance weight 3 is lifted by the hanging tool hung on the second hanging tool. The second hook is provided behind the plane P3. The plane P3 passes through the center of gravity G1 of the balance weight 3. The plane P3 includes a rotation axis 13.

The balance weight 3 is hung by the hanging tool with the upper end portion tilted forward. As a result, the hanger is less likely to interfere with the upper frame 7. At this time, since the front surface of the balance weight 3 is rotated by an angle θ4 from the vertical plane, the rotation shaft 13 is located near the framework 4 behind the hanger. Therefore, the rotating shaft 13 can be easily mounted on the receiving portion 24 from above. This facilitates the loading of the balance weight 3.

The balancing weight device according to the present invention can be applied to an elevator. The method for loading a balanced weight according to the present invention can be applied to loading a balanced weight into a balanced weight device of an elevator.

1 Balanced weight device, 2 Main rope, 3 Balanced weight, 4 Framework, 5 Rear frame, 6 Front frame, 7 Upper frame, 8 Vertical frame, 9 Lower frame, 10 Rail guide, 11 Opening, 12 Beam, 13 Rotating shaft, 14 openings, 15 limits, 16 rear links, 17 front links, 18 joints, 19 slits, 20 eyebolts, 21 chain blocks, 22 suspension rings, 23 chain blocks, 24 receivers.

Claims (21)

With a balanced weight,
A framework that is rectangular when viewed from the front and supports the balance weight from below,
A front frame provided on the front surface of the frame, having an upper end portion and a lower end portion, and supporting the balance weight from the front, and a front frame.
Equipped with
The lower end portion is supported by the framework so that the front frame can rotate forward so that the front frame is inclined toward the framework from the upper side to the lower side .
The front frame forms an opening between the upper end portion and the frame by rotating toward the front, and supports the balance weight loaded from the opening from the front.
Balanced weight device. The balancing weight device according to claim 1, further comprising a limiting portion that limits the rotation angle of the upper end portion of the front frame to a range up to an acute opening angle. The limiting portion comprises a plurality of links rotatably connected to each other and provided between the framework and the anterior frame.
The balancing weight device according to claim 2, wherein at least one of the plurality of links includes a first hook on which a pulling tool for pulling up the link is hooked. The balancing weight device according to claim 3, wherein the framework has a slit that opens toward the front on the upper surface above the position where the restriction portion is provided. The balanced weight is
2. The described balancing weight device. The front frame has a rotating shaft that projects laterally at the lower end portion.
The balancing weight device according to any one of claims 1 to 4, wherein the framework has a receiving portion that rotatably supports the front frame by receiving the rotating shaft detachably from above. The balance weight device according to claim 6, wherein the front frame is integrally assembled with the balance weight. The balanced weight is
The balance weight device according to claim 7, further comprising a second hook that is provided behind the plane including the axis of rotation through the composite center of gravity of the balance weight and the front frame and on which a suspension for lifting the balance weight is hung. A framework that is rectangular when viewed from the front and has a receiving part that opens upward at the lower end.
It has a rotating shaft that protrudes laterally at the lower end, and after mounting the rotating shaft on the receiving portion from above with the upper end tilted forward, the upper end is rotated backward about the rotating shaft. By doing so, the balanced weights loaded into the framework,
A balanced weight device equipped with. The balancing weight device according to claim 9, further comprising a limiting portion that limits the rotation angle of the upper end portion of the balancing weight to a range up to an acute opening angle. The limiting portion comprises a plurality of links rotatably connected to each other and detachably provided between the framework and the counterweight.
The balancing weight device according to claim 10, wherein at least one of the plurality of links includes a first hook on which a pulling tool for pulling up the link is hooked. The balancing weight device according to claim 11, wherein the framework has a slit that opens toward the front on the upper surface above the position where the restriction portion is provided. The balanced weight is
The balance weight device according to any one of claims 9 to 11, further comprising a second hook that is provided behind a plane that passes through the center of gravity and includes the axis of rotation and on which a suspender for lifting the balance weight is hung. The front frame, which is provided on the front surface of the rectangular framework when viewed from the front and whose lower end is rotatably supported by the framework, is rotated forward so as to be inclined toward the framework from above to below. An opening step of forming an opening between the upper end of the front frame and the frame,
The loading process of loading a balanced weight from the opening and
A storage process in which the upper end portion of the front frame is rotated backward to store the balance weight in the frame.
How to load a balanced weight with. The storage process is
The pulling tool is hung on the first hook of any of a plurality of links rotatably connected to each other and provided between the frame and the front frame, and the link is pulled up by the pulling tool to pull the link to the upper end of the front frame. The method for loading a balanced weight according to claim 14, further comprising a pulling step of rotating the portion backward. A lifting process in which a counterweight with a front frame attached to the front is lifted with the upper end of the front frame tilted forward.
A mounting process in which the rotation axis projecting laterally at the lower end of the front frame is mounted from above on the receiving portion of the rectangular frame at the lower end when viewed from the front.
A rotation step of rotating the upper end portion of the front frame rearward around the rotation axis to store the balance weight in the frame.
How to load a balanced weight with. The rotation step is
An attachment process in which a plurality of links rotatably connected to each other are attached between the framework and the front frame.
A pulling step of hooking a pulling tool on the first hook of any of the plurality of links and pulling the link with the pulling tool to rotate the upper end portion of the front frame backward.
The method for loading a balanced weight according to claim 16. In the lifting step, the balancing weight is lifted by a lifting tool hung on a second hanging tool provided behind the plane including the rotation axis and passing through the synthetic center of gravity of the front frame. The method for loading a balanced weight according to claim 17. The lifting process of lifting the balance weight with the upper end tilted forward,
A mounting process in which a rotation axis projecting laterally at the lower end of the balance weight is mounted from above on a receiving portion having a rectangular framework at the lower end when viewed from the front.
A rotation step of rotating the upper end portion rearward around the rotation axis to store the balance weight in the framework.
How to load a balanced weight with. The rotation step is
A mounting process in which a plurality of links rotatably connected to each other are attached between the framework and the counterweight.
A pulling step of hooking a pulling tool on the first hook of any of the plurality of links and pulling the link with the pulling tool to rotate the upper end portion of the balance weight backward.
The method for loading a balanced weight according to claim 19. The 19th or 20th claim, wherein in the lifting step, the balancing weight is lifted by a lifting tool hung on a second hanging tool provided behind a plane passing through the center of gravity of the balancing weight including the rotation axis. How to load the balanced weights.

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