JP6771289B2 - Bolt rotation device - Google Patents

Description

The present invention relates to a device for rotating a large and heavy bolt.

Maintenance of stud bolts used for casings of turbine equipment is carried out by arranging the removed bolts on square lumber and polishing the bolts by workers. Since the diameter of the bolt is about φ50 mm to φ200 mm and the length is about 1000 mm, which is large and heavy, the work is usually performed with the bolt simply placed on the square timber. For this reason, the polishing work on the lower side of the bolt is difficult to visually check and the working posture is poor, which increases the burden on the operator.

As a device for polishing bolts, for example, those disclosed in Patent Document 1 and Patent Document 2 are known. The device disclosed in Patent Document 1 is a device for polishing a bolt having a relatively small diameter, and the bolt polishing is completed by placing the bolt on a pedestal and pushing the bolt between two rotating brushes. It is to let you. Further, the device disclosed in Patent Document 2 is a device for polishing a bolt having a large diameter, and presses two brushes having different rotation directions against the bolt arranged along the roller of the roller conveyor. , Polishing the outer circumference while rotating the bolt.

Japanese Unexamined Patent Publication No. 2013-180377 Japanese Unexamined Patent Publication No. 10-21709

The devices disclosed in Patent Documents 1 and 2 are all considered to be very effective devices in terms of polishing bolts. However, since each device has a configuration in which bolts are set on a pedestal or conveyor and the brush is pressed from above or from the left and right, the device becomes large and the device is used for equipment maintenance. You can't bring in. Therefore, when a bolt polishing device as disclosed in Patent Documents 1 and 2 is adopted, it is necessary to temporarily collect the bolts removed from the device and transport the bolts to the place where the device is placed. As a result, problems such as deterioration of workability and increase in labor will occur.

Therefore, an object of the present invention is to provide a bolt rotating device that can be easily brought to a work site and can be miniaturized, and can improve the efficiency of conventional bolt maintenance work.

The bolt rotating device for achieving the above object is a device for rotating bolts supported by both sides on a pair of pedestals for maintenance, and is between the pair of pedestals and of the bolts to be rotated. a base to be used by placing the lower is disposed on the upper surface side of the base, a drive roller that applies a rotational force to support the bolt and the rotating object, said a top side of said base A driven roller that is arranged adjacent to the drive roller and that supports the bolt and rolls together with the bolt to which a rotational force is applied by the drive roller, and a driven roller that is arranged on the upper surface side of the base and projects to the lower surface side of the base. The telescopic portion is provided , and the base is raised by extending the telescopic portion, and the elevating means for cutting the ground of the bolt to be rotated supported by the drive roller and the driven roller, and the telescopic portion are contracted. A traveling means capable of moving the base by touching the ground in the state is provided, and the driven roller is provided with a slide mechanism for changing the distance between the driven roller and the driving roller. It is a feature.

Further, in the bolt rotating device having the above-mentioned characteristics, the traveling means may be a wheel having a rotating shaft arranged on the upper surface side of the base, and the ground contact surface may be projected to the lower surface side of the base. By having such a feature, it is possible to narrow the distance between the base and the ground contact surface as compared with the case where the wheel is arranged on the lower surface side of the base. Therefore, it is possible to reduce the height of the entire bolt rotating device, and it is not necessary to use an excessive square timber.

Further, in the bolt rotating device having the above-mentioned characteristics, it is preferable that the wheels are formed so that the circumference of the central portion is larger than the circumference of both ends by providing a round on the ground contact surface. By having such a feature, the installation area of the wheel can be reduced. As a result, even if the wheel is not provided with a rotation mechanism, it can be easily slid when changing the traveling direction of the bolt rotating device.

Further, in the bolt rotating device having the above-mentioned characteristics, the driving roller has a first roller portion and a second roller portion, and a rotating shaft is provided between the first roller portion and the second roller portion. It has an arranged split structure, and a drive gear for transmitting power from the drive means may be provided on the rotating shaft. By having such a feature, the width of the entire device can be narrowed while balancing the bolt support position of the driven roller and the bolt support position of the drive roller.

Further, in the bolt rotating device having the above-mentioned characteristics, the driving roller and the driven roller may be provided with an elastic member coated on the surface of the roller. By having such a feature, it is possible to prevent the bolt from being scratched by the contact between the metals, and it is possible to suppress the slip of the bolt and to rotate the bolt reliably.

Further, in the bolt rotating device having the above-mentioned characteristics, it is desirable that the diameter of the driving roller is smaller than the minimum diameter of the bolt to be rotated. By having such a feature, when the bolt is rotated, it is possible to prevent the bolt from rotating too fast. Therefore, work safety can be ensured.

According to the bolt rotating device having the above-mentioned characteristics, it is possible to realize a simple and compact size that can be brought to the work site. In addition, the efficiency of conventional bolt maintenance work can be improved.

It is a top view of the bolt rotation apparatus which concerns on embodiment. It is a side view of the bolt rotating device which concerns on embodiment. It is a partial cross-sectional view which shows the structure of the drive roller and the driven roller. It is a figure for demonstrating a specific example at the time of using the bolt rotation apparatus which concerns on embodiment with respect to the temporarily placed bolt. It is a figure which shows the use state of the bolt rotating apparatus which concerns on embodiment.

Hereinafter, the form of the bolt rotating device of the present invention will be described in detail with reference to the drawings. Note that FIG. 1 is a plan view of the bolt rotating device according to the embodiment, and FIG. 2 is a side view. Further, FIG. 3 is a partial cross-sectional view showing the structures of the driving roller and the driven roller.

The bolt rotating device 10 according to the present embodiment is basically composed of a base 12, a traveling means 14, an elevating means 16, a driving roller 18, and a driven roller 20.

[base]
The base 12 is a frame for mounting the traveling means 14, the elevating means 16, the driving roller 18, and the driven roller 20, which will be described in detail later. The base 12 is formed with openings for attaching the traveling means 14 and the elevating means 16, and handles 12a are provided at both ends in the longitudinal direction. In the bolt rotating device 10 according to the embodiment, it is necessary to suppress the total height of the device to a predetermined height, that is, the size of the square timber (for example, 100 mm) or less. Therefore, the components are centrally arranged on the upper surface side of the base 12. The elements that need to be projected to the lower surface side of the base 12 are configured to be projected to the lower surface side via the base 12. Therefore, the base 12 is provided with an opening.

The handle 12a is an element used when transporting the bolt rotating device 10 or when pushing out or pulling out the bolt 32 (see FIGS. 4 and 5) to be rotated. Therefore, as long as the function can be exhibited, the shape is not limited to the U-shape shown in FIG. 1 and the L-shape.

[Traveling means]
The bolt rotating device 10 according to the embodiment adopts a configuration in which the bolt 32 is rotated while the bolt 32 to be rotated is supported from the lower surface side. Therefore, the traveling means 14 plays a role of reducing the labor when moving the bolt rotating device 10 to the lower part of the bolt 32 to be rotated. In the modes shown in FIGS. 1 and 2, wheels are used as the traveling means. The wheel is configured such that the holder 14a arranged on the upper surface side of the base 12 is provided with a rotation shaft, and a part of the outer periphery of the wheel protrudes to the lower surface side of the base 12 through the opening. There is. With such a configuration, the amount of protrusion of the base 12 toward the lower surface side can be suppressed. Therefore, the height of the entire bolt rotating device 10 can be suppressed.

Further, the wheels constituting the traveling means 14 according to the present embodiment are formed so that the circumference of the central portion is made larger than the circumferences of both ends by providing a round on the ground contact surface so that the cross-sectional shape is a so-called barrel shape. ing. With such a configuration, the ground contact area of the wheel can be reduced. Therefore, when the traveling direction of the bolt rotating device 10 is deviated, or when the crossing state between the bolt 32 to be rotated and the bolt rotating device 10 is not appropriate, the bolt rotating device 10 itself is in a direction different from the wheel rotating direction. It is possible to reduce the labor when sliding to.

[Elevating means]
The elevating means 16 arranges the bolt rotating device 10 under the bolt 32 to be rotated, and then mounts the bolt 32 on the roller surfaces of the drive roller 18 and the driven roller 20, which will be described in detail later (FIG. FIG. It is an element for raising from 4). The specific configuration of the elevating means 16 is not limited, but the bolt rotating device 10 according to the embodiment employs an air jack in which the working fluid is a gas. The air jack is configured to include a cylindrical cylinder 16a and a rod 16b protruding from the cylinder 16a. In the bolt rotating device 10 according to the embodiment, the cylinder 16a is arranged on the upper surface side of the base 12 with the protruding direction of the rod 16b facing the lower surface side, and the rod 16b is moved from the lower surface side of the base 12 to the floor surface through the opening. The structure that protrudes toward is adopted. With such an arrangement configuration, the height of the bolt rotating device 10 can be suppressed. Further, in a state where the rod 16b is pressed against the floor surface, the rod 16b is further extended so that the base 12 to which the cylinder 16a is fixed is lifted from the floor surface.

[Drive roller]
The drive roller 18 is a roller for generating a rotational force for rotating a bolt 32 supported by a driven roller 20, which will be described in detail later. Therefore, the drive roller 18 is provided with the drive means 24 via the gear 22. The drive means 24 is not particularly limited as long as it can obtain power, but in the modes shown in FIGS. 1 and 2, an air motor is adopted. The gear 22 varies depending on the reduction ratio and the arrangement form of the drive means 24, but at least the following may be used. That is, the pinion gear provided on the rotation shaft of the drive means 24 and the drive gear provided on the rotation shaft of the drive roller 18 may be provided, and the drive gear may be rotated by the rotation of the pinion gear. In the case of the form shown in FIG. 1, since the rotation axis of the drive means 24 and the rotation axis of the drive roller 18 are orthogonal to each other, the pinion gear may be a worm gear and the drive gear may be a worm wheel.

Further, in the case of the form shown in FIG. 1, the drive roller 18 is divided into two parts (for example, the first roller part and the second roller part) in consideration of the arrangement form of the drive means 24 and the reduction of the installation space. The drive means 24 is arranged between the drive rollers 18. In the bolt rotating means 10 according to the embodiment, since the base 12 is inserted between the pedestals (square lumbers) 30, the width of the base 12 is limited. Therefore, when there is only one drive roller and the drive means is arranged at the end of the drive roller, the drive roller is arranged at a position deviated from the driven roller. On the other hand, by forming the drive roller 18 into a divided structure, the bolt 32 is supported at three points by three rollers (two drive rollers 18 and one driven roller 20). Then, by arranging the two drive rollers 18 apart from each other, the supported state of the bolt 32 can be stabilized.

Further, the drive roller 18 is made of metal to support the heavy bolt 32. Therefore, as shown in FIG. 3, an elastic member 18a is provided on the surface thereof. The elastic member 18a serves to prevent the bolt 32 to be rotated from slipping and to prevent scratches caused by contact with the metal roller body 18b. The elastic member 18a may be urethane or the like, and can be formed by baking on a metal surface. The thickness of the elastic member 18a depends on the diameter of the roller, but may be about 5 mm to 10 mm.

Further, the diameter of the drive roller 18 is configured to be smaller than the diameter of the bolt 32 to be rotated. With such a configuration, the rotation speed of the bolt 32 is lower than the rotation speed of the drive roller 18. The bolt rotating device 10 according to the present embodiment is intended for work such as manual bolt maintenance. Therefore, according to the above configuration, there is no risk of endangering the operator due to the rotation speed of the bolt 32 becoming too high.

[Driven roller]
The driven roller 20 is a roller that supports the bolt 32 to be rotated together with the drive roller 18 and plays a role of following the rotation of the bolt 32 rotated by the drive roller 18. Like the drive roller 18, the driven roller 20 may also be composed of a metal roller body 20b and an elastic member 20a coated on the surface thereof.

Further, the driven roller 20 includes a slide mechanism 26. The slide mechanism 26 includes a pair of slide rails arranged on the base 12 along a direction orthogonal to the arrangement direction of the driven rollers 20, and a slide holder 26b that can move on each slide rail 26a and can be positioned and fixed. It is composed of. The rotating shaft 20c of the driven roller 20 is held by a pair of slide holders 26b. With such a configuration, the driven roller 20 can adjust the distance between the driven roller 20 and the driving roller 18 according to the diameter of the bolt 32 to be rotated. This makes it possible to stably support the bolt 32.

[Operating means]
In the bolt rotating device 10 according to the present embodiment, the power of the elevating means 16 and the driving means 24 is air. Therefore, the bolt rotating device 10 is provided with an operating means 28 for adjusting the air provided to the elevating means 16 and the driving means 24. Air is supplied to the operating means from an air supply line (not shown), and the configuration is such that the air supply direction and supply pressure to each elevating means 16 and the driving means 24 can be adjusted and switched. The air supply direction and supply pressure may be adjusted by using a switching valve, a pressure control valve, or the like. For example, in the driving means 24, the rotation speed can be adjusted by changing the air supply pressure.

[motion]
Before use, the bolt rotating device 10 having the above configuration adjusts the arrangement position of the driven roller 20 according to the diameter of the bolt 32 to be rotated by the slide mechanism 26. After that, as shown in FIG. 4, the pedestal (square lumber) 30 such as sleepers is slid under the bolt 32 supported by both sides. After arranging the bolt rotating device 10 on the lower side of the bolt 32 to be rotated, air is supplied to the elevating means 16 via the operating means, and the rod 16b is projected to raise the base 12. As a result, the bolt 32 is cut off from the pedestal 30 while being supported by the driving roller 18 and the driven roller 20.

By supplying air to the driving means 24 while the bolt 32 is supported by the driving roller 18 and the driven roller 20, the driving roller 18 can be rotated and the bolt 32 can be rotated. As a result, the worker can perform maintenance work such as polishing work of the bolt 32 in a comfortable posture.

After the maintenance work of the bolt 32 is completed, the bolt 32 for which the maintenance work has been completed is placed on the pedestal (square lumber) 30, and the bolt rotating device 10 is moved to the next bolt 32.

[effect]
According to such a bolt rotating device 10, the device itself can be made compact and simple. Therefore, it can be brought to the work site. Further, since the bolt 32 temporarily placed on the pedestal (square lumber) 30 such as sleepers or square lumber can be lifted and rotated on the spot to perform maintenance, the efficiency of the maintenance work of the conventional bolt 32 is improved. be able to.

Further, in the above embodiment, it is described that the bolt rotating device 10 is used for maintenance such as polishing and cleaning of bolts. However, the bolt rotating device 10 according to the present embodiment is also used when a nut (not shown) is attached to one end of the bolt 32 when the bolt 32 to be rotated is a stud bolt. Can be done. Since the nut may be set at the end of the rotating bolt 32, the labor for rotating the large and heavy nut can be reduced.

Further, in the above embodiment, it is described that wheels are adopted for the traveling means 14. However, the traveling means 14 may be any as long as it can move the bolt rotating device 10 and can keep the overall height of the device low. Therefore, in addition to the wheels, a slider or the like made of a resin having a low coefficient of friction may be used.

10 ……… Bolt rotation device, 12 ……… Base, 12a ……… Handle, 14 ……… Traveling means, 14a ……… Holder, 16 ……… Lifting means, 16a ……… Cylinder, 16b ……… Rod, 18 ……… Drive roller, 18a ……… Elastic member, 18b ……… Roller body, 20 ……… Driven roller, 20a ……… Elastic member, 20b ……… Roller body, 20c ……… Rotating shaft , 22 ……… Gear, 24 ……… Drive means, 26 ……… Slide mechanism, 26a ……… Slide rail, 26b ……… Slide holder, 28 ……… Operating means, 30 ……… Pedestal (square material) , 32 ……… Bolt.

Claims (6)

A device that rotates bolts that are supported by both sides on a pair of pedestals for maintenance.
A base that is used by being placed between the pair of pedestals and under the bolt to be rotated .
Is disposed on the upper surface side of the base, a drive roller that applies a rotational force to support the bolt and the rotating object,
A driven roller on the upper surface side of the base, which is arranged adjacent to the drive roller and which supports the bolt and rolls together with the bolt to which a rotational force is applied by the drive roller.
A telescopic portion that is arranged on the upper surface side of the base and projects to the lower surface side of the base is provided , and the base is raised by extending the telescopic portion, and the rotating object supported by the driving roller and the driven roller. Lifting means to cut the bolts
A traveling means capable of moving the base by touching the ground when the telescopic portion is contracted is provided.
A bolt rotating device, characterized in that the driven roller is provided with a slide mechanism that changes the distance between the driven roller and the driving roller. The bolt rotating device according to claim 1, wherein the traveling means is a wheel for arranging a rotating shaft on the upper surface side of the base, and has a configuration in which a ground contact surface projects toward the lower surface side of the base. The bolt rotating device according to claim 2, wherein the wheel is formed so that the circumference of the central portion is larger than the circumference of both ends by providing a round on the ground contact surface. The drive roller has a first roller portion and a second roller portion, and has a divided structure in which a rotation shaft is arranged between the first roller portion and the second roller portion. The bolt rotating device according to any one of claims 1 to 3, wherein a drive gear for transmitting power from the drive means is provided. The bolt rotating device according to any one of claims 1 to 4, wherein the driving roller and the driven roller are coated with an elastic member on the surface of the roller. The bolt rotating device according to any one of claims 1 to 5, wherein the diameter of the driving roller is made smaller than the minimum diameter of the bolt to be rotated.

Images