JP3872495B1 - Mobile scaffold equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile scaffold device capable of raising and lowering a boarding bucket in a more stable state.
In a mobile scaffold device that lifts and lowers a boarding bucket 40 by winding or unwinding a wire 21 with a winch 20, a plurality of wires 21 are used for lifting and lowering the bucket 40. Drums 24 and 24 were provided so that the wires 21 and 21 could be wound around different drums 24 and 24, respectively, and fed out. If it does in this way, bucket 40 can be raised and lowered smoothly in a more stable state.
[Selection] Figure 1

Description

  The present invention relates to a mobile scaffold device used in an operation performed while an operator moves along an outer wall of a building, such as a remodeling operation of an outer wall of a building.

  As a conventional mobile scaffold device, a traveling device installed so as to be hooked on an upper edge of a standing wall of a building, a guide rail connected to the traveling device in a suspended state, and a vertical movement along the guide rail can be performed. And a winch installed on a traveling device, and a wire end wound around a winch winding drum is connected to the bucket. (See Patent Document 1).

In this mobile scaffold device, when the traveling device is moved along the upper edge of the standing wall, the boarding bucket moves laterally along the upper edge of the standing wall, and when the wire is wound up or fed out by the winch drum, it is boarded. The bucket moves up and down. Therefore, the worker who rides on the boarding bucket can move to an arbitrary position along the outer wall of the building, and can perform work such as remodeling work at that position.
Japanese Patent No. 3531820

  By the way, when winding a wire with a winch, for example, as shown in FIG. 7, the wire 101 is regularly wound around the drum 102 so as to be spiral around the winding core of the drum 102. When the wire 101 is wound in this way, the winding position P of the wire 101 around the drum 102 moves in one direction D1 in the rotation axis direction of the drum 102. When the winding position reaches the position of one end of the drum 102, the wire 101 is wound on the wire 101 that has already been wound. At this time, the winding position P of the wire 101 moves in the direction D2 opposite to that. That is, the wire 101 is wound around the drum 102 while changing the inclination angle A with respect to the drum rotation axis orthogonal direction. In other words, the wire 101 is wound around the drum 102 while moving so as to swing within the range of the width of the winding core portion of the drum 102.

  However, when the winding position P of the wire 101 around the drum 102 becomes the end position of the drum 102, the inclination angle A of the wire 101 with respect to the drum rotation axis orthogonal direction becomes a large angle (see angle A1 in FIG. 7). A lateral force that attempts to shift the winding position of the wire 101 toward the center of the drum 102 acts on the wire 101 wound around the drum 102 in an inclined state. The lateral force increases as the tilt angle A increases. Accordingly, at the position of the end of the drum 102 where the tilt angle A is large, the winding position of the wire 101 may be shifted due to the influence of the lateral force. In particular, when the boarding bucket is raised to the vicinity of the traveling device, the inclination angle A of the wire 101 becomes a very large angle (see the angle A2 in FIG. 7), and the winding position of the wire 101 is more easily displaced. . If the winding position of the wire 101 is shifted, the wire 101 cannot be regularly wound. Then, there is a possibility that the shock of the deviation is transmitted to the bucket and surprises the passenger. Further, when the inclination angle A of the wire 101 is increased, the difference between the direction in which the bucket is pulled by the wire 101 and the lifting / lowering direction of the bucket (the direction perpendicular to the drum rotation axis) is increased. When the difference in direction becomes large, the operation of pulling up the bucket becomes difficult to perform smoothly, and the lifting and lowering operation of the bucket may become unstable.

  Moreover, as FIG. 8 shows, the upper edge E of the standing wall W which is the installation destination of the traveling apparatus 103 of a mobile scaffold apparatus may incline. Even in such a case, the traveling device 103 can be installed on the upper edge E of the standing wall W.

  However, in this case, the traveling device 103 is installed in an inclined state. However, the guide rail 104 is installed in a state extending in the vertical direction. Therefore, the inclination angle A of the wire 101 with respect to the direction perpendicular to the drum rotation axis may be larger than that when the traveling device 103 is installed without being inclined. For example, when the rotation axis of the drum 102 is tilted upward, the straight line C (see FIG. 7) extending in the direction perpendicular to the drum rotation axis is in a state C1 tilted to the left. In this case, the inclination angles A1 and A2 of the wire 101 are larger. As is clear from this explanation, the state in which the traveling device 103 is inclined is a state in which the inclination angle of the wire is likely to increase, and the winding position is likely to be shifted. And if a winding position shifts | deviates, the malfunction similar to the malfunction demonstrated previously will arise.

  The present invention has been made in view of such problems, and the boarding bucket is in a more stable state regardless of the position of the boarding bucket to be lifted and the installation environment of the mobile scaffolding device, and the like. It is an object of the present invention to provide a mobile scaffold device that can be moved up and down.

In order to solve the above-described problem, the present invention provides a traveling unit installed on the upper edge of a standing wall of a building so as to be movable along a direction in which the upper edge extends;
A guide rail connected to the traveling unit and extending downward from the traveling unit along the outer wall surface of the standing wall, a boarding bucket attached to the guide rail so as to be movable up and down, and a traveling unit A movable scaffolding device having an installed winch and a wire having one end wound around the winch and the other end connected to the bucket, and lifting and lowering the bucket by winding or feeding the wire with the winch The number of the wires is two, and the winch is provided with two winding drums so that each wire can be wound and fed by different winding drums. The two winding drums are attached to both ends of a shaft rotatably installed on the traveling unit and are A wheel gear is attached to the central portion of the shaft, and a worm gear that is rotated by a lifting motor is engaged with the wheel gear. By rotating the lifting motor forward and backward, The wire is wound and delivered, and the bucket has a plurality of rotating members rotatably attached to the bucket, and each rotating member is configured to rotate the rotating member. A connecting portion for connecting the wire is provided at a position where the rotating member is rotationally moved, and each of the rotating shafts of the rotating members is parallel to the rotating shaft of the winding drum. It is connected to the connecting part of the rotating member .

Invention of Claim 2 is a movable scaffold apparatus of Claim 1 , Comprising: The said rotation member has an arm part used when hooking the said bucket on the said guide rail side, and The arm portion can be pivoted to a lock position where the arm portion can be hooked on the guide rail side member, and the arm portion can be pivoted to an unlock position where the arm portion is not hooked on the guide rail side member. In the state where the suspension member is supported by the suspension, the rotation member is positioned at the unlock position, and when the bucket is not supported by the wire, the rotation member is located at the lock position. It is.

  According to the first aspect of the present invention, since there are a plurality of wires used for raising and lowering the boarding bucket, the bucket can be held and raised in a stable state. In addition, if a plurality of wires are used to raise and lower the bucket, the load burden per wire is reduced, so that a thinner wire can be used as compared with the case where there is only one wire. When the wire becomes thin, even if the winding length is the same, it is possible to wind the wire at a tight interval as the wire is thin, and it is possible to use a narrower drum as the drum for winding the wire become. If the width of the drum is narrowed, the maximum inclination angle of the wire wound around the drum is reduced while changing the inclination angle so as to swing. If this maximum inclination angle is reduced, the winding position of the wire is less likely to be displaced when the wire is to be wound regularly, so that the winding operation is performed more reliably. As a result, the boarding bucket can be raised and lowered smoothly in a more stable state.

And according to invention of Claim 1 , since the rotating drum is installed so that a rotating shaft may be located on the same axis | shaft, it can be easily provided in one shaft, By rotating this shaft, all the winding drums can be rotated under the same conditions such as the same rotational speed. When a plurality of drums are rotated under the same conditions as described above, all the wires can be wound and fed out in a mutually stable state. Therefore, the bucket supported by being suspended by the wire can be lifted and lowered smoothly in a more stable state.

Further, according to the invention described in claim 1, the two wires, because one winding with two winding drum mounted on both ends of the shaft, the tension of the wire is applied with good balance on the shaft state Can be secured. If the force applied to the shaft is well balanced, the shaft can be rotated in a more stable state, so that the wire can be wound in a more stable state by the winding drum attached to the shaft. And the bucket suspended and supported by the wire can be raised and lowered smoothly in a more stable state. Furthermore, if the two winding drums are detachably attached to the shaft, the traveling unit can be further divided into smaller parts, so that the weight of the divided members becomes lighter, and the traveling unit can be transported and assembled easily. become. In addition, since the structure is such that two thin wires are wound by different drums, compared to the case where a relatively thick wire is wound by one drum, each drum with the wire wound thereon is wound. The weight is significantly lighter. Also in this respect, it is excellent in transportability and assemblability. In addition, according to the first aspect of the present invention, the wheel gear is attached to the central portion of the shaft, the worm gear rotated by the lifting motor is meshed with the wheel gear, and the lifting motor is connected to the wheel gear. The wire can be wound and unwound by forward and reverse rotation.

According to the first aspect of the present invention, the plurality of wires are connected to the bucket via the rotating member attached to the bucket. Therefore, when the state of the force applied between the wire and the bucket changes, the rotating member rotates so that the change in the direction and magnitude of the force is gently transmitted to the wire and bucket. Can do. If the change in direction and magnitude of the force is gently transmitted to the wire or bucket, the suspension support state by the wire of the bucket becomes more stable, and the bucket can be lifted and lowered smoothly in a more stable state. Further, damage to the wire is prevented. For example, when the guide rail attached in a state where the bucket can be raised and lowered is shaken or twisted, the magnitude and direction of the force applied between the wire and the bucket change.

According to invention of Claim 2 , when a rotation member is located in an unlocking position, a bucket can be raised / lowered smoothly freely in a stable state. On the other hand, when the bucket moves downward when the rotating member is positioned at the lock position, the arm portion of the rotating member is caught by the member on the guide rail side, and the bucket can be supported by being suspended from the guide rail by the rotating member. .

  Hereinafter, embodiments of a mobile scaffold device according to the present invention will be described in detail with reference to the drawings. In addition, the code | symbol attached | subjected to each drawing made the same thing with the same function.

  As shown in FIG. 1, the mobile scaffold device is suspended from the traveling unit 10 installed on the upper edge E of the standing wall W of the building B, the winch 20 installed on the traveling unit 10, and the traveling unit 10. A guide rail 30 connected in a state, and a riding bucket 40 that is installed so as to be movable up and down along the guide rail 30 and to which a wire 21 wound or fed by the winch 20 is connected.

  As shown in FIG. 2A, the traveling unit 10 includes a top plate 11a on which the winch 20 is installed, and a pair of front and rear frames 11b and 11c assembled on the lower side of the top plate 11a. It has the frame 11, and is installed in the upper edge E of the standing wall W in the state which straddles the upper edge E of the standing wall W with the front frame 11b and the rear frame 11c.

  As shown in FIG. 3, two traveling rollers 12 a and 12 b that are in contact with the surface of the upper edge E of the standing wall W are attached to the unit frame 11. Each traveling roller 12a, 12b is attached in a state in which the rotation axis direction is orthogonal to the direction in which the standing wall W extends. Of the two traveling rollers 12a and 12b, a traveling motor 13 is connected to the first traveling roller 12a shown on the left side in FIG. 3 via a speed reducer. Therefore, by operating this traveling motor 13, the traveling rollers 12a and 12b can be rotated to move the traveling unit 10 in the lateral direction.

  The traveling rollers 12 a and 12 b are attached to lower ends of screw rods 14 a and 14 b that are screwed to the top plate 11 a of the unit frame 11. Handles 15a and 15b for rotating the screw rods 14a and 14b to move up and down are attached to the upper ends of the screw rods 14a and 14b. The rotational position can be fixed by a clamp (not shown). Thus, the position of each traveling roller 12a, 12b in the vertical direction can be easily adjusted individually by turning the corresponding handles 15a, 15b. And the inclination of the traveling unit 10 can be adjusted by adjusting the vertical position of the traveling rollers 12a, 12b. Therefore, according to the apparatus of the present embodiment, for example, the inclination of the traveling unit 10 can be adjusted so that a shaft 23 described later included in the winch 20 faces horizontally. Rubber is stretched around the outer periphery of each of the running rollers 12a and 12b, and the running rollers 12a and 12b are less likely to slip with respect to the running surface that comes into contact.

  In addition, for the purpose of preventing rainwater from flowing into the inside of the building B, the wall may be a standing wall Wt inclined downward toward the outside of the building B (see FIG. 2B). In such a case, a tapered traveling roller 12c is used (see FIG. 2B). If the traveling roller is a tapered traveling roller, the traveling unit 10 can be installed in a state where the top plate 11a is horizontal even when the surface of the upper edge E is inclined.

  As shown in FIG. 2A, the unit frame 11 is attached with an outer side roller 16a that is in contact with the outer surface of the standing wall W and an inner side roller 16b that is in contact with the inner surface of the standing wall W. ing. Both side rollers 16a and 16b are attached in a state where the traveling unit 10 is installed and their rotational axis directions are directed vertically. When the traveling unit 10 moves laterally, the standing wall W Rotate while rolling on the side of the. Out of the side rollers 16 a and 16 b, the outer side roller 16 a is fixed to the unit frame 11. On the other hand, the inner side roller 16b is attached via a position adjusting mechanism 17, and can move close to and away from the inner surface of the standing wall W. Note that the position adjusting mechanism 17 used in the present embodiment uses a screw mechanism. As described above, if at least one of the side rollers is mounted so that the position thereof can be adjusted, the distance between the side rollers 16a and 16b can be adjusted according to the thickness of the standing wall, and the both side rollers 16a and 16b can be surely connected to the standing wall. The side of W can be contacted.

  Further, a metal fitting 18 having a connection hole 18 a (see FIG. 3) used for connecting the guide rail 30 to the traveling unit 10 is attached to the lower end portion of the front frame 11 b of the traveling unit 10. .

  As shown in FIG. 4, the guide rail 30 has a ladder shape, and is attached at a predetermined interval between two rail members 31 having a U-shaped cross section arranged in parallel and the rail members 31. And a plurality of bars 32 extending in the lateral direction. As for each guide rail 31, the recessed part of a U-shaped cross section is orient | assigned to the outer side. Moreover, the metal rod 33 in which the connection hole 33a used for connecting the guide rail 30 to the driving | running | working unit 10 is attached to the bar 32 located on the uppermost side when installed among the bars 32. Yes. Therefore, when a connecting pin (not shown) is inserted in a state where the connecting hole 33a and the connecting hole 18a of the traveling unit 10 are overlapped, the guide rail 30 is connected to the traveling unit 10 (see FIG. 3).

  Further, a metal fitting 34 having a connection hole 34a is also attached to the bar 32 positioned at the lowest side when installed. Therefore, the plurality of guide rails 30 can be connected by overlapping the upper connection hole 33a of another guide rail 30 on the lower connection hole 34a and fastening with the connection pin. Furthermore, the guide rail coupling body of a required length can be prepared by connecting the guide rails one after another.

  The bar 32 positioned on the uppermost side of the guide rail 30 is provided with a hooking hole 32a for hanging and supporting the guide rail 30 separately from the connection hole 33a. As will be described later, when the guide rail 30 is connected to the traveling unit 10, the guide rail 30 needs to be pulled up to the height of the traveling unit 10. The hooking hole 32a is used in this lifting operation.

  As shown in FIG. 5, a riding bucket 40 is attached to the guide rail 30 so as to be able to move up and down along the guide rail 30. The bucket 40 is obtained by attaching a bottom plate (not shown) and four side plates 42 arranged in four directions to a rectangular parallelepiped frame 41, and an upper portion is an opening. An operator gets into the bucket 40 from this opening. The bucket 40 is attached to the guide rail 30 via a slider 43 attached to the recess of the guide rail 30 having a U-shaped cross section so that the bucket 40 can be moved up and down smoothly along the guide rail 30. ing.

  In addition, two lock arms 44 that can be hooked on the bar 32 of the guide rail 30 are attached to the upper end of the side plate 42 located on the guide rail 30 side (see FIGS. 1 and 5). Each lock arm 44 is pivotally attached to the side plate 42 of the bucket 40 at the base position, and can be hooked on the bar 32 of the guide rail 30 (indicated by a two-dot chain line in FIG. 5). And an unlocked position where it is not caught (position shown in practice in FIG. 5). The direction of the rotation axis of the lock arm 44 is a horizontal direction parallel to the moving direction of the traveling unit 10.

  Each lock arm 44 is formed with a through hole 44 a used as a connecting portion for two wires 21 used for raising and lowering the bucket 40. Therefore, the bucket 40 can be suspended and supported by the wire 21. The wire 21 can be wound and fed out by the winch 20. When the wire 21 is wound up by the winch 20, the bucket 40 is raised, and when the wire 21 is drawn out, the bucket 40 is lowered.

  A through hole 44 a to which the wire 21 is connected is formed at a position on the distal end side of the lock arm 44. Therefore, when the bucket 40 is suspended and supported by the wire 21, the lock arm 44 is located at the unlock position. In this state, the lock arm 44 is not caught by the bar 32, and the bucket 40 can be raised and lowered freely along the guide rail 30.

  A spring 45 is connected between each lock arm 44 and the side plate 42 of the bucket 40. The spring 45 is in an extended state when the lock arm 44 is located at the unlock position, and applies an urging force in a direction to rotate to the lock position side. That is, when the bucket 40 is suspended and supported by the wire 21, an urging force in a direction to constantly rotate to the lock position is applied to the lock arm 44 of the bucket 40. Accordingly, when the upward pulling force is released, for example, by removing the wire 21 from the suspension supported state, the lock arm 44 is automatically rotated to the locked position by the biasing force of the spring 45.

  As shown in FIG. 2A and FIG. 3, a winch 20 used for winding and unwinding the wire 21 is installed on the top plate 11 a of the traveling unit 10. As shown in FIG. 3, the winch 20 includes an elevating motor 22 with a speed reducer and a shaft 23 rotated by the elevating motor 22.

  The shaft 23 is installed such that the rotation axis is oriented in the horizontal direction when the traveling unit 10 is installed on the upper edge E of the standing wall W extending horizontally. Further, drums 24 and 24 for winding the wire are attached to both ends of the shaft 23. Each of the drums 24 and 24 includes a winding core portion 24a for winding the wire 21 and flange portions 24b on both sides of the winding core portion 24a. The drums 24 and 24 are attached so that the rotation axis thereof is located on the same axis as the rotation axis of the shaft 23, and rotate integrally with the shaft 23.

  Note that the drum 24 may be detachably attached to the shaft 23. If the drum 24 is detachable, the traveling unit 10 can be further divided into smaller parts, so that the weight of the divided members becomes lighter, and the transportation and assembly work of the traveling unit 10 becomes easier. In addition, since the structure is such that two thin wires are wound by different drums, compared to the case where a relatively thick wire is wound by one drum, each drum with the wire wound thereon is wound. The weight is significantly lighter. In this respect, it is excellent in transportability and assembly.

  A wheel gear 25 is attached to the central portion of the shaft 23. The wheel gear 25 is meshed with a worm gear 26 that is rotated by the output shaft of the lifting motor 22. The elevating motor 22 is capable of forward and reverse rotation. When the elevating motor 22 is rotated forward, the wire 21 is wound around the drum 24 and the bucket 40 is raised. When the elevating motor 22 is reversed, the wire 21 is The bucket 40 descends from the drum 24.

  The traveling unit 10 is provided with a control unit 27 that houses a controller (not shown) that controls the operations of the traveling motor 13 and the lifting motor 22 (see FIG. 1). The control unit 27 is equipped with a receiver that receives a control signal from the controller and sends it to the controller. On the other hand, the bucket 40 is provided with a remote controller 46 having a transmitter for transmitting control signals for the traveling motor 13 and the lifting motor 22. Therefore, the operator can remotely control the control of the motors 13 and 22 in a state where the worker is on the bucket 40. The remote controller 46 is detachably installed with respect to the bucket 40, and the operator can control the operations of the motors 13 and 22 at any position other than the bucket 40, such as a state standing on the building B side. .

  In addition, although not necessarily required, the mobile scaffold device of the present embodiment uses the lower traveling unit 50 to which the guide rail 30 located on the lowermost side among the connected guide rails 30 is connected. The lower traveling unit 50 has the same structure as that of the upper traveling unit 10, and a description thereof will be omitted. The lower traveling unit 50 travels at the same speed in synchronization with the upper traveling unit 10. When such a lower traveling unit 50 is used, the guide rail 30 can be held in a more stable state.

  When such a mobile scaffold device is installed on the upper edge E of the standing wall W of the building B, the traveling unit 10 is first installed on the upper edge E of the standing wall W (see FIG. 1 or FIG. 2A). . The traveling unit 10 to be installed is in a state where the guide rail 30 is not connected and the wire 21 wound around the winch 20 is not connected to the bucket 40.

  Here, the upper edge E of the standing wall W on which the traveling unit 10 is to be installed may be inclined (see FIG. 6). In such a case, the upper and lower handles 15a and 15b of the screw rods 14a and 14b supporting the traveling rollers 12a and 12b are turned as necessary to adjust the vertical positions of the traveling rollers 12a and 12b. The shaft 23 of the winch 20 is made horizontal (see FIG. 6). As described above, according to the mobile scaffold device of the present embodiment, the traveling unit is configured so that the shaft 23 of the winch 20 is easily leveled regardless of whether the upper edge E of the standing wall W is inclined. 10 installation states can be adjusted.

  In addition, a fence made of steel or the like is partially provided in the middle of the standing wall W, and a step or a gap may be generated at the upper edge E of the standing wall W. In such a case, a cover K having a U-shaped cross section is attached to the fence so as to cover the upper edge E of the standing wall W (see FIG. 1), and then the traveling unit 10 is placed on the cover body K. It is good to install. In this way, the traveling unit 10 can smoothly travel along the upper edge E of the standing wall W.

  When the traveling unit 10 is installed, the outer side roller 16a is brought into contact with the outer surface of the standing wall W. In this state, the position of the inner side roller 16b with respect to the traveling unit 10 is adjusted, and the inner side roller 16b is moved to the standing wall W. (See FIG. 2). By doing so, when the traveling unit 10 is moved along the upper edge E of the standing wall W, the displacement of the traveling unit 10 in the thickness direction of the standing wall is prevented, and the traveling unit 10 is moved in a stable state. be able to.

  Furthermore, power cords (not shown) of the traveling motor 13 and the lifting motor 22 are connected to a predetermined power source so that the traveling rollers 12a and 12b and the winch 20 are operable. Thereafter, the winch 20 is operated to feed out two wires 21 from the drum 24, and the tip of the wire 21 is lowered until it reaches the ground.

  Further, in consideration of the height to the installation position of the traveling unit 10, a necessary number of guide rails 30 are prepared, and the prepared guide rails 30 are connected to each other on the ground.

  And the front-end | tip of the wire 21 is hooked on the guide rail 30 using the hooking hole 32a of the guide rail 30 located in the uppermost side in the state which installed the movable scaffold apparatus. In this state, the winch 20 is operated to wind the wire 21 and the guide rail 30 is pulled upward. And the upper connection hole 33a of the uppermost guide rail 30 and the connection hole 18a of the traveling unit 10 are made to overlap (refer to FIG. 3). Then, the guide rail 30 is connected to the traveling unit 10 through connection pins (not shown) through the overlapping connection holes 18a and 33a. The operation of passing the connecting pin through the connecting holes 18a and 33a can be performed by reaching out from a place such as a veranda inside the standing wall W where the traveling unit 10 is installed. The guide rail 30 connected to the traveling unit 10 receives gravity and extends in the vertical direction.

  Note that the tip of the wire 21 may have a hook, a ring shape, or various shapes. Further, when the wires 21 are hooked on the guide rails 30, the wires 21 may be hooked on different hook holes 32 a, but in order to lift the guide rails 30 smoothly, the two wires 21 should be balanced. A state where tension is applied must be ensured, and the lifting operation is not always easy. For this reason, the wire 21 may be hooked on the guide rail 30 via a wire hooking auxiliary tool. The auxiliary tool has a hook that hooks into the hooking hole 32a of the guide rail 30 at one end, the other end is divided into two branches, and a hook that hooks the wire 21 at each other end divided into two branches. Can be used. By using such an auxiliary tool and pulling one hook on the guide rail, the guide rail can be lifted in a balanced manner.

  When the connection of the guide rail 30 to the traveling unit 10 is completed, the wire 21 hooked on the hooking portion of the guide rail 30 is removed, the winch 20 is operated, the two wires 21 are fed out again, and the tip is grounded. Take down until it reaches. Further, the boarding bucket 40 is attached to the guide rail 30 located on the lowermost side. Then, the corresponding wire 21 is connected to each lock arm 44 of the bucket 40, and the wire 21 is wound up by the winch 20 so that tension is applied to the wire 21. Then, the lock arm 44 is rotated and positioned at the unlock position, and the bucket 40 can be lifted and lowered.

  As can be understood from the above description, the mobile scaffold device of the present embodiment can be easily assembled. Therefore, if this is used, the preparatory work time in the field is remarkably shortened.

  Further, in the conventional mobile scaffold device, when the upper edge E of the standing wall W is inclined, the shaft 23 of the traveling unit 10 is inclined, so that the wire 21 is pulled more than the shaft 23 is inclined. The direction was tilted. When the inclination of the wire 21 is increased, for example, when the wire 21 is wound by the drum 24, an excessive force is easily applied to the wire 21 such that the wire 21 hits the flange portion 24b of the drum 24 and bends and deforms. In this regard, according to the mobile scaffold device of this embodiment, the shaft 23 of the traveling unit 10 can be easily adjusted to be horizontal by adjusting the vertical position of the traveling rollers 12a and 12b. The inclination angle of the shaft 21 with respect to the shaft rotation axis can be prevented from increasing, and an excessive force can be prevented from being applied to the wire. If it can do in this way, durability of wire 21 will improve.

  Note that the removal work of the mobile scaffold device of the present embodiment is a work of executing the assembly work described so far in the reverse order, and thus the description thereof is omitted here.

  The mobile scaffold device installed in this manner is operated and used by a remote controller 46 installed in the bucket 40. For example, when the operator wants to move to the right in the horizontal direction toward the building B, the operator operates the remote controller 46 to rotate the traveling motor 13 forward, and when he wants to move to the left, the operator rotates the traveling motor 13 in the reverse direction. I do.

  Further, when it is desired to move up, the remote controller 46 is operated, and the elevating motor 22 of the winch 20 is rotated forward to wind up the wire 21, and when it is desired to move down, the elevating motor 22 is reversed to feed the wire 21. Perform the operation. In the apparatus of the present embodiment, the drum 24 around which the wire 21 is wound is attached to both ends of the shaft 23, and the weight load on the bucket 40 side is transmitted to the shaft 23 through the wire 21 in a balanced manner. Therefore, the wire 21 can be wound or fed out in a balanced manner by the drums 24 and 24 of the shaft 23.

  By the way, when the lifting motor 22 is rotated forward to wind the wire 21, the wire 21 is regularly drummed while changing the inclination angle A (see FIG. 7) so as to swing as described above. 24 is wound up. In the present embodiment, since the bucket is moved up and down using two wires 21, a thinner wire can be used as compared with the case where one wire is used. Therefore, as shown in FIG. 3, a drum having a shorter winding core portion 24 a, that is, a narrow drum can be used as the drum 24 for winding each wire 21. If the width of the drum 24 is reduced, the maximum inclination angle of the wire 21 wound around the drum 24 can be reduced while changing the inclination angle. If the inclination angle of the wire 21 is small, the winding position is prevented from being displaced, and the wire 21 can be regularly wound at any position of the full width of the drum 24. In the present embodiment, the maximum inclination angle of the wire 21 is 4 ° or less, and the wire can be wound up with a small inclination angle.

  In addition, when two straight lines extending through the through holes 44a of the lock arm 44 so as to be orthogonal to the rotation axis of the shaft 23 are considered, in the present embodiment, these two straight lines are both It intersects with the rotation axis of the shaft 23 at an intermediate position of the winding core portion 24 a of the corresponding drum 24. In addition, both the wires 21 and 21 shown by FIG. 3 are the states extended along the position of two straight lines here. The inclination angle of the wire 21 wound in such a state with respect to the direction perpendicular to the drum rotation axis is 0 °. At the position where the inclination angle of the wire is 0 °, a force that causes a shift in the winding position of the wire 21 does not act, and the wire 21 can be wound around the drum 24 in a stable state. As will be understood from this description, if the drum 24 is installed at a position where the winding core portion 24a of the drum and the crossing position overlap with each other, an increase in the tilt angle of the wire 21 is suppressed when the wire 21 is wound around the drum 24. it can. As a result, it is possible to prevent a force that causes a shift in the winding position from acting, or to prevent a large force from acting. In particular, as in this embodiment, when the drum is installed so that the previous crossing position is located at the intermediate position in the longitudinal direction of the winding core, the maximum inclination angle of the wire with respect to the drum rotation axis can be minimized, and more It is possible to reliably prevent the winding position from shifting.

  Further, consider a straight line passing through the positions of the through holes 44a, 44a, which are the connecting portions of the wires 21. Both through holes 44 a and 44 a are formed at the same position on the lock arm 44. Therefore, if the rotational positions of both the lock arms 44 are the same, the straight line passing through the positions of the through holes 44a and 44a becomes horizontal. In the present embodiment, since the bucket 40 is suspended and supported by the wires 21 and 21 connected to the through holes 44a and 44a, in the state where the bucket 40 is suspended and supported by the wires 21 and 21, each lock is locked. The arms 44 and 44 are autonomously rotated so as to be positioned at the same rotation position, and a straight line passing through the positions of the through holes 44a and 44a becomes horizontal. On the other hand, the direction of the rotating shaft of the drum 24 is oriented in the horizontal direction by adjusting the vertical position of the traveling rollers 12a and 12b of the traveling unit 10. Therefore, in this embodiment, when the buckets 40 are suspended and supported by the wires 21 and 21, the direction of the rotating shaft of the drum 24 and the straight line passing through the positions of the through holes 44a and 44a are parallel to each other. According to the apparatus of this embodiment, since it can be in such a state, the bucket 40 can be suspended and supported by the wire 21 in a well-balanced state, and the bucket 40 can be lifted and lowered smoothly in a more stable state. it can.

  Further, if the plurality of wires 21 are connected to the bucket 40 via a rotation member such as the lock arm 44, when the state of the force applied between the wire and the bucket changes, the lock arm 44 rotates, Changes in the direction and magnitude of the force are gradually transmitted to the wire 21 and the bucket 40. Examples of the case where the magnitude and direction of the force applied between the wire and the bucket change include a case where the guide rail 30 is shaken or twisted. In such a case, if the change in the direction and magnitude of the force is gently transmitted to the wire 21 and the bucket 40, the state in which the bucket 40 is suspended and supported by the wire 21 can be made more stable, and in a more stable state. The bucket 40 can be raised and lowered smoothly. Moreover, if damage to the wire 21 is minimized, smooth winding of the wire is ensured, and the bucket 40 can be lifted and lowered smoothly in a more stable state. Further, the life of the wire 21 can be extended.

  For example, even if the wire 21 is directly connected to the bucket 40 without using the lock arm 44, it is possible to make the straight line passing through the two wire connecting positions parallel to the rotating shaft of the drum. However, if the wires 21 and 21 are connected to the rotatable lock arms 44 and 44 as in the present embodiment, the lock arms 44 and 44 rotate and autonomously pass through the two through holes 44a. 44a is a preferred position. That is, by forming the through holes 44a at substantially the same positions of the lock arms 44, the straight line passing through the through holes 44a and 44a and the rotation axis of the drum 24 can be easily made parallel.

  Further, in the mobile scaffold device of the present embodiment, the free fall distance of the bucket 40 can be minimized even if both the wires 21 are broken for some reason. More specifically, in a state where the bucket 40 is suspended and supported by the wire 21, the lock arms 44 and 44 receive upward tension from the wire and are positioned at the unlock position. When the wire 21 is cut from this state, the lock arms 44 and 44 do not receive upward tension from the wire 21. The rotational positions of the lock arms 44 and 44 are determined by the urging force in the rotational direction received from the spring 45. That is, the lock arms 44 and 44 are rotated from the unlock position to the lock position by the force of the spring 45. Since the lock arms 44 and 44 rotated to the lock position can be hooked on the bar 32 of the guide rail 30, they are hooked on the bar 32 that first hits when the bucket 40 falls. This stops the bucket 40 from dropping. As described above, the lock arms 44, 44 of the present embodiment are automatically and instantaneously moved to the lock position where they are hooked on the bar 32 of the guide rail 30 when the wire 21 is cut. 40 fall distances can be minimized.

It is a perspective view which shows the mobile scaffold apparatus of embodiment which concerns on this invention. It is a side view which shows the traveling unit of the mobile scaffold apparatus shown by FIG. It is a side view which shows another Example of the traveling roller used with the traveling unit shown by FIG. It is a front view which shows the traveling unit of the mobile scaffold apparatus shown by FIG. It is a front view which shows the guide rail of the mobile scaffold apparatus shown by FIG. It is a side view which shows the bucket of the mobile scaffold apparatus shown by FIG. It is a front view which shows another installation state of the mobile scaffold apparatus of embodiment which concerns on this invention. It is a schematic diagram explaining the state by which a wire is wound up by the conventional drum. It is a front view which shows the state in which the traveling apparatus of the conventional mobile scaffold apparatus was inclined and installed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Traveling unit 12a, 12b Traveling roller 18 Traveling motor 20 Winch 21 Wire 22 Lifting motor 23 Shaft 24 Winding drum 24a Winding core part 24b Flange part 30 Guide rail 40 Bucket 44 Lock arm 44a Through hole B Building W Standing wall E Upper edge of the standing wall

Claims (2)

A traveling unit installed on the upper edge of the standing wall of the building so as to be movable along the extending direction of the upper edge;
A guide rail connected to the traveling unit and installed along the outer wall surface of the standing wall in a state extending downward from the traveling unit;
A boarding bucket attached to the guide rail so as to be movable up and down;
A winch installed in the traveling unit;
A wire having one end wound around a winch and the other end connected to a bucket;
A mobile scaffold device that raises and lowers a bucket by winding or unwinding a wire with a winch,
The number of wires is two;
The winch is provided with two winding drums so that each wire can be wound and fed by different winding drums,
The two winding drums are attached to both ends of a shaft that is rotatably installed in the traveling unit and are detachably attached to the shaft.
A wheel gear is attached to the central portion of the shaft, and a worm gear rotated by a lifting motor is engaged with the wheel gear, and the wire is wound and fed by rotating the lifting motor forward and backward. And
The bucket has a plurality of rotating members rotatably attached to the bucket,
Each rotating member includes a connecting portion for wire connection at a position where the rotating member rotates and rotates with the rotation of the rotating member,
The rotation axis of each rotation member is parallel to the rotation axis of the winding drum,
Each said wire is a movable scaffold apparatus connected with the connection part of a respectively separate rotation member . The rotating member has an arm portion that is used when the bucket is hooked on the guide rail side, and the arm portion is capable of hooking the arm portion to the member on the guide rail side. Is pivotable to an unlock position where it does not catch on the member on the guide rail side,
In a state where the bucket is suspended and supported by the wire, the pivot member is positioned at the unlock position, and in a state where the bucket is not suspended and supported by the wire, the pivot member is locked. The mobile scaffold device according to claim 1 , which is located at a position.

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