JP4796202B1 - Lifting scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a lifting scaffold capable of developing a work deck into an arc shape, preferably a complicated shape, without exchanging a deck frame.
An elevating scaffold 1 having at least a mast 20, a drive unit 30 for raising and lowering the mast 20, and work decks 40L and 40R connected to the drive unit 30. The work decks 40L and 40R include a plurality of deck frames. 40 (i) are connected to each other, and a connecting mechanism 50 is provided between the deck frame 40 (i) and the drive unit 30 and / or between the deck frames 40 (i) and 40 (j). The connection mechanism 50 has an angle variable means 603 for setting the connection angle, and connection state maintaining means 602 and 602 for maintaining the connection interval.
[Selection] Figure 1

Description

  The present invention relates to a lifting scaffold provided with a work deck that can be used for a wall surface work of a structure having a curved wall surface, particularly a tower-like structure.

  As a working scaffold used in a construction site such as a building, a lifting scaffold that can be easily installed and removed on the site is used. The elevating scaffold has a drive unit that raises and lowers a mast attached to a base called a base plate, and a work deck attached to the drive unit (Patent Document 1). Such an elevating scaffold is suitable for use in a wall surface work or the like of a structure in which the work deck is linear in a plan view and the wall surface is substantially flat. However, when such a lifting scaffold is used for wall work of a structure whose wall surface is curved, the distance between the linear work deck and the wall surface forming the phase cannot be kept constant, and workability for wall work is reduced. Or inconveniences such as hindering the safety of workers. Then, the raising / lowering scaffold in the building which has the bent wall surface was proposed (patent documents 2-4).

Patent Document 2 discloses a work lifting scaffold for wall work on a bent wall surface. The work lifting scaffold has a work deck in which a plurality of girders (deck frames) are connected and integrated, and the work deck includes a girder having a trapezoidal shape in plan view.
A shape along the bent wall surface can be formed. However, when the bending (curvature) of the wall surface of the structure is different, the girders having a trapezoidal shape must be exchanged.

  Patent Literature 3 discloses a chimney suspension scaffold that connects small arc-shaped scaffolds one after another by a pivot and forms an annular scaffold surrounding the chimney. However, since the scaffold is supported by a column from the upper part of the chimney, it is difficult to move up and down along the outer wall of the chimney (not a liftable scaffold). Further, the scaffold requires a work deck that can be developed into an arc shape on a wall surface of a building or the like having a semicircular shape in plan view. However, Patent Document 3 discloses technical means for developing the work deck into an arc shape. Is not disclosed.

  Patent Document 4 discloses an aerial work gondola in which an annular gondola suspended by a crane or the like is externally fitted to a chimney. However, the high-altitude work gondola is not a liftable scaffold because it requires a device other than a work scaffold such as a crane. The ring-shaped gondola has a plurality of substantially arc-shaped divided bodies and an expansion / contraction mechanism that connects them, and can adapt to the curvature of the chimney outer wall, but it is also only within the adjustment range of the expansion / contraction mechanism. . Furthermore, the divided parts (substantially arc shape) of the work work at high places are connected so as to form an annular shape, and Patent Document 4 also discloses technical means for expanding the work deck into an arc shape. Not disclosed.

JP 2010-106607 A JP 2010-138652 A Japanese Utility Model Publication No. 56-52555 Japanese Utility Model Publication No. 61-1546

  As described above, the conventional lifting type scaffold has a problem that the girder must be exchanged in accordance with the change in the curvature of the wall surface of the structure. Also, work scaffolds for tower structures such as chimneys are not liftable scaffolds, and there are limits to the changes in the curvature of the wall of the structure, or the work deck is deployed in an arc shape. There is a problem that you can not.

  An object of the present invention is to solve the above-mentioned problem, and can cope with a change in the curvature of the wall surface of the structure without exchanging the deck frame (girder). The purpose of the present invention is to realize a lifting and lowering scaffold that can be deployed not only in a circular arc shape but also in a more complicated shape of the wall surface of the structure.

In order to solve the above-mentioned problems, an elevating scaffold according to the present invention (Claim 1) has at least a mast, a drive unit for raising and lowering the mast, and a work deck connected to and supported by the drive unit, It is formed by connecting a plurality of deck frames. A connection mechanism is provided for connecting the deck frame and the drive unit and / or the deck frame . Coupling mechanism, the angle varying means for varying the articulation angle to a desired angle, caused by the change of the consolidated angle, a change in coupling intervals, connecting state maintaining means for maintaining a desired state, and bond Has a part. The angle varying means is interposed between the coupling portions, and the driving portion and the work deck can freely move up and down in a state where the coupling portion is coupled to the driving portion or the deck frame.

  In this way, the work deck connected to and supported by the drive unit adjusts the connection angle of each connection mechanism (without exchanging the deck frame), thereby changing the shape of the plan view to a circumferential shape, a linear shape, and the like. In addition to the arc shape, a more complicated plan view shape can be obtained. Of course, the plan view shape (for example, an arc shape having a predetermined curvature) of the work deck can be maintained by maintaining the connection interval generated by changing the plan view shape of the work deck.

Further, in the lifting type scaffold (Claim 2), the connecting mechanism has one end side connecting portion and the other end side connecting portion, and the one end side connecting portion and the other end side connecting portion are connected to the deck frame or the driving portion. Thus, the deck frame can be connected to the driving unit, or the two deck frames can be connected.

Here, each of the one end side connecting portion and the other end side connecting portion has a polygonal columnar shape and realizes the strength required for the work deck. An angle variable means is disposed between the one end side connecting portion and the other end side connecting portion so that the connecting angle of both the connecting portions can be varied. For example, the one end-side connecting portion and the other end-side connecting portion are (substantially) triangular prism-shaped, and the three corners of both connecting portions are connected by three angle varying means. And the other end side connecting portion can be connected while maintaining the strength required for the work deck. Of course, portions other than the vicinity of the three corners of both connecting portions may be connected by the angle varying means.

As long as the connection state maintaining means is slidably connected to the angle variable means in one or both of the one end side connection portion and the other end side connection portion (Claim 3), the connection state maintaining means is a component thereof. It is possible to cope with a change in the interval between the two connecting portions that occurs with this adjustment while adjusting the connecting angle without replacing (component). That is, the connection angle can be easily adjusted.

Further, in the lifting and lowering scaffolding in which the angle varying means has a rotating shaft portion, and the one end side connecting portion and the other end side connecting portion of the connecting mechanism are rotatably connected by the rotating shaft portion (Claim 4), the connected state A maintenance means can maintain the connection state of the one end side connection part and the other end side connection part.

  As described above, according to the lifting and lowering scaffold according to the present invention, it is possible to cope with a change in the curvature of the wall surface of the structure without exchanging the deck frame, and the work deck can be developed into an arc shape. In addition, the work deck can be deployed not only in an arc shape but also in a more complicated shape on the wall surface of the structure.

It is a figure for demonstrating schematic structure etc. of the raising / lowering scaffold concerning one Example of this invention. It is a figure for demonstrating schematic structure etc. of the connection mechanism which the raising / lowering scaffold shown in FIG. 1 has. It is a figure for demonstrating schematic structure etc. of the coupling joint which the coupling mechanism shown in FIG. 2 has. It is a figure for demonstrating the connection between the deck frames by the connection coupling shown in FIG. It is a figure for demonstrating the example which expand | deployed the work deck of the raising / lowering scaffold shown in FIG. 1 along the wall surface of the structure which makes a curved surface. It is a figure for demonstrating the modification of the connection mechanism of the raising / lowering scaffold shown in FIG. It is a figure for demonstrating schematic structure etc. of the coupling of the connection mechanism (modification) shown in FIG.

  Hereinafter, an elevating scaffold according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic configuration of an elevating scaffold 1 according to one embodiment of the present invention. The elevating scaffold 1 includes one base 10, one mast 20 erected on the base 10, a drive unit 30 that is attached to the mast 20 and moves up and down, and a drive unit deck that is attached to the top of the drive unit 30. 31, connected to the work deck 40L connected to the first side (left side in FIG. 1) 30a of the drive unit 30 and to the second side (right side in FIG. 1) 30b of the drive unit 30. A work deck 40R.

(Work deck and deck frame)
The work decks 40L and 40R have deck frames 40 (i) (i = 1, 2,..., 2n). Here, the work deck 40L has deck frames 40 (1), 40 (3),..., 40 (2n-1), and the work deck 40R has deck frames 40 (2), 40 (4). ,..., 40 (2n). FIG. 1 illustrates the deck frames 40 (1) to 40 (4).

The deck frame 40 (i) has a length L (for example, L = 1.5 m), has a truss structure, and is lightened, and has coupling portions 41 for coupling to the coupling mechanism 50 at both ends. And connected to the adjacent deck frame 40 (j) or the drive unit 30 via the connecting mechanism 50 (j = i + 2 or j = i−2). For example, the deck frames 40 (1) and 40 (2) are respectively connected to the drive unit 30 by a connecting mechanism 50 connected to one end thereof, and similarly to the connecting mechanism 50 connected to the other end. It is connected to the deck frames 40 (3) and 40 (4).

(Coupling mechanism)
As shown in FIG. 2, the coupling mechanism 50 includes one end side coupling portion 51L and the other end side coupling portion 51R. The one end side connecting portion 51L and the other end side connecting portion 51R are formed of a triangular prism-shaped frame (for example, about 40 cm in length) that forms a substantially isosceles triangle, and one of the three peripheral surfaces mounts the deck plate 52. A deck plate mounting portion 511 (for example, a length of about 40 cm and a width of about 90 cm) is formed.

Since the one end side connecting portion 51L and the other end side connecting portion 51R are disposed opposite to each other and have substantially the same shape, these structures will be described with the one end side connecting portion 51L. Three short frames 512a, 512b, and 512c are arranged in a substantially parallel and equidistant manner in the upper side of the one end side connecting portion 51L, and both end sides of these short frames 512a to 512c are long frames 513a. And 513b to form a substantially rectangular deck plate placement portion 511 (region defined by the short frames 512a and 512c and the long frames 513a and 513b).

  One bottom frame 514 is disposed below the short frame 512b disposed in the center of the deck plate mounting portion 511. Four support frames 515 are integrally connected between the four corner portions 511 a to 511 d of the deck plate mounting portion 511 and both end portions of the bottom frame 514. The corner portions 511a and 511b are both ends of the short frame 512a, and the corner portions 511c and 511d are both ends of the short frame 512c.

  On the side of the longitudinal frame 513a of the deck plate mounting portion 511 (left side in FIG. 2), coupling portions 516 are disposed at both ends of the longitudinal frame 513a, and similarly, the coupling portions 516 are also disposed at the ends of the bottom frame 514. It is arranged. These connecting portions 516 are connected to the connecting portion 41 of the adjacent deck frame 40 (j) or the first side portion 30a or the second side portion 30b of the driving portion 30.

On the other hand, on the long frame 513b side of the deck plate mounting portion 511, sliding coupling portions 517a to 517c are disposed at the ends of the short frames 512a to 512c, respectively, and the sliding coupling portion 517d is disposed at the end of the bottom frame 514. Is arranged.
The short frame 512c has a handrail grip 518. Therefore, the deck frame 40 (i) can attach the handrail 42 to the handrail gripping portion 518 of the one end side connecting portion 51L and the other end side connecting portion 51R of the connecting mechanism 50 connected to both ends thereof. In addition, by providing the handrail grip 518 also on the short frame 512a, the front and rear handrails 42 can be attached to the deck frame 40 (i).

(Connecting joint)
As shown in FIG. 3, the coupling joint 60 for coupling the one end side coupling portion 51 </ b> L and the other end side coupling portion 51 </ b> R has one end side coupling 601 and the other end side coupling 602. The one end side joint 601 and the other end side joint 602 are connected by a hinge portion 603. The hinge portion 603 has one end side hinge 603 a fixed to the one end side joint 601 and the other end side hinge 603 b fixed to the other end side joint 602. The tip end portion 603c of the one end side hinge 603a and the tip end portion 603d of the other end side hinge 603b are rotatably connected by a bolt 603e and a nut 603f to form a rotation center portion of the hinge portion 603.

  FIG. 4 is a view for explaining the connection between the deck frame 40 (2) and the deck frame 40 (4) by the connection joint 60 in the work deck 41R of the liftable scaffold 1.

One end side connecting portion 51L of the connecting means 50 is connected to the deck frame 40 (2), and the other end side connecting portion 51R of the connecting means 50 is connected to the deck frame 40 (4) ( FIG. 4 (a)). Four connecting joints 60 are interposed between the one end side connecting portion 51L and the other end side connecting portion 51R (FIGS. 4B and 4C). One end side joints 601 of these connection joints 60 are slidably inserted into the sliding coupling parts 517a to 517d of the one end side connecting part 51L, and the other end side joint 602 is slidable on the other end side connecting part 51R. It is slidably inserted into the dynamic coupling portions 517a to 517d.

FIG. 4B shows the connecting angle θ of the connecting means 50 so that the interval between the sliding coupling portions 517c is larger than the interval between the sliding coupling portions 517a of the one end side connecting portion 51L and the other end side connecting portion 51R. Shows the case where is set. Since the coupling joint 60 has the hinge portion 603, the coupling angle between the one end side coupling portion 51L and the other end side coupling portion 51R of the coupling mechanism 50 can be changed (the deck frame 40 (2) and the deck frame). 40 (4) and the connecting angle can be adjusted.) In response to the change in the distance between the one end side connecting portion 51L and the other end side connecting portion 51R of the connecting mechanism 50 that is caused by this angle adjustment, the connecting joint 60 slides between the one end side connecting portion 51L and the other end side connecting portion 51R. It is possible to adapt by changing the insertion length to the dynamic coupling portions 517a to 517d (the coupling joint 60 can be connected between the one end side coupling portion 51L and the other end side coupling portion 51R without exchanging its constituent elements. The connection angle can be changed, and the connection state between the two can be maintained.) Of course, a deck plate is appropriately placed between the one end side connecting portion 51L and the other end side connecting portion 51R of the connecting mechanism 50.

  Here, in order to maintain the connection state between the one end side connection portion 51L and the other end side connection portion 51R at a predetermined connection angle, the rotation center portion of the hinge portion 603 (FIG. 3) is tightened with the bolt 603e and the nut 603f. Alternatively, the one end side joint 601 and the other end side joint 602 of the connecting joint 60 inserted into the sliding coupling portions 517a to 517d may be tightened by bolts or the like (not shown).

(Example of working deck deployment)
FIG. 5A is a diagram showing an example in which the work decks 40L and 40R are developed along the wall surface 70 having a curved surface with a radius R. FIG. In such a case, the work decks 40L and 40R can be developed along the wall surface 70 by setting the connection angle of each connection mechanism 50 according to the curvature 1 / R of the wall surface 70.

  FIG. 5B is a diagram showing an example when the work decks 40L and 40R are developed along the wall surface 70 'whose curvature 1 / R is not constant. Here, the deck frames 40 (1) and 40 (2) are directly connected to the drive unit 30 (they are connected linearly). On the other hand, the deck frame 40 (3) and the deck frame 40 (4) are coupled to the deck frame 40 (1) and the deck frame 40 (2) via the coupling mechanism 50, and the coupling angle can be set to a desired angle. it can. As described above, the work decks 40L and 40R can be developed into various planar shapes according to the curved surface. Further, although not particularly shown in the figure, the scaffold having the above-described configuration can be applied to a shape in which the unevenness of curvature is replaced with (complex).

  By the way, in the case of a tower-like structure such as a chimney, the base 10, the mast 20 and the drive unit 30 are respectively installed at two points sandwiching the central axis of the tower-like structure. By connecting the work decks 40L and 40R developed in a semicircular shape to each other, an elevating scaffold having an annular work deck can be obtained. Of course, when the diameter of the tower-like structure is large, three or more bases 10, masts 20, and driving units 30 may be used. Thus, the elevating scaffold according to the present invention can be variously modified according to the configuration of the curved surface of the wall surface of the structure.

(Modification of coupling mechanism)
Next, a modified example of the connecting mechanism of the lifting scaffold according to the present invention will be described with reference to FIG. The connecting mechanism 55 shown in FIG. 6 has one end side connecting portion 55L and the other end side connecting portion 55R. Since the one end side connecting portion 55L and the other end side connecting portion 55R are arranged opposite to each other and have substantially the same shape, these structures will be described with the one end side connecting portion 55L.

  The upper frame 551 disposed at the upper portion of the one end side connecting portion 55L has substantially the same length as the width of the deck frame 40 (i), and the lower frame 552 disposed at the lower portion in parallel with the upper frame 551 is The length of the upper frame 551 is about one half. The end portion of the upper frame 551 and the end portion of the lower frame 552 are integrally connected by a frame 553, and the lower frame 552, the upper frame 551, and the frame 553 are substantially U-shaped. Further, both ends of the upper frame 551 and the tip of the lower frame 552 are connected by two support frames 554 (the upper frame 551 and the two support frames 554 form a substantially isosceles triangle).

  The one end side connecting portion 55L and the other end side connecting portion 55R are rotatably connected by two hinge portions 555 formed at both ends of each support frame 554. The connection center of the two hinge portions 555 is a rotating shaft portion 55c of the one end side connecting portion 55L and the other end side connecting portion 55R.

Further, the one end side connecting portion 55L and the other end side connecting portion 55R are provided with a connecting portion 556 for connecting to the deck frame deck 50 (i) or the driving portion 50 in the vicinity of both ends of the upper frame 551 and the end of the lower frame 552. Each has. In this way, while connecting the three connecting portions 556 arranged at the positions corresponding to the three vertices of the isosceles triangle and the connecting portion 41 of the deck frame 40 (i), for example, the connecting strength is secured. The connecting mechanism 55 can be connected to the deck frame 40 (i). Thus, the connecting mechanism 55 can connect the two deck frames 40 (i) and the deck frame 40 (j), and similarly connects the deck frame 40 (i) and the drive unit 30. Can do.

  As shown in FIG. 7, the joint 56 includes, for example, a pipe joint pipe 560 and clamp portions 561 provided at both ends thereof. The clamp part 561 includes a joint pipe clamp 561a that clamps the joint pipe body 560 and a connection part clamp 561b that clamps the one end side connection part 55L or the other end side connection part 55R of the connection mechanism 55. Here, the joint portion between the joint tube clamp 561a and the connecting portion clamp 561b can freely rotate.

In a state where the two joint tube clamps 561a and the two connecting portion clamps 561b are loosened, one connecting portion clamp 561b is connected to the lower frame 552 of the one end side connecting portion 55L, and the other connecting portion clamp 561b is connected to the other end side. It can be locked to the lower frame 552 of the portion 55R. In this state, since all the clamp parts 561 are loosened, the connection angle of the connection mechanism 55 can be set to a desired angle.

After setting the connection angle of the connection mechanism 55 to a desired angle, the connection angle of the connection mechanism 55 can be maintained at a desired angle by tightening the two joint tube clamps 561a and the two connection portion clamps 561b. (The connected state can be maintained.)

Of course, two or more joints 56 may be used. In this case, the two support frames 554 of the one end side connecting portion 55L and the other end side connecting portion 55R can be connected by the joint 56.

In addition, this invention is not limited to the Example mentioned above, It can deform | transform suitably and implement in the range which does not deviate from the meaning.

  Since the elevating scaffold according to the present invention can be manufactured, sold and used at a construction site, the present invention has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Lifting type scaffolding 10 Base 20 Mast 30 Drive part 40L, 40R Work deck 40 (i) Deck frame 50, 55 Connection mechanism 517a-517d, Sliding coupling part 51L, 55L One end side connection part (connection part)
51R, 55R The other end side connection part (connection part)
55c Rotating shaft 56 Joint (connected state maintaining means)
555 Hinge (angle variable means)
601 One end side joint (connected state maintaining means)
602 Hand on the other end side (connected state maintaining means)
603 Hinge (angle variable means)

Claims (4)

An elevating scaffold having at least a mast, a drive unit for raising and lowering the mast, and a work deck connected to the drive unit,
The work deck is formed by connecting a plurality of deck frames, and has a connecting mechanism that connects between the deck frame and the drive unit and / or between the deck frames.
The coupling mechanism includes an angle changing means for changing the articulation angle, the connected state maintaining means for maintaining a coupling interval of that, and the coupling portion,
The angle varying means is interposed between the coupling portions;
With the coupling unit coupled to the driving unit or the deck frame,
An elevating scaffold, wherein the drive unit and the work deck can freely move up and down.   The connection mechanism is arranged between the one end side connection portion and the other end side connection portion each having a polygonal column shape, and between the one end side connection portion and the other end side connection portion. The lifting / lowering scaffold according to claim 1, further comprising an angle varying unit capable of varying a coupling angle of the other end side coupling portion.   The lifting / lowering scaffold according to claim 2, wherein the connection state maintaining means slidably connects the angle varying means in both or one of the one end side connection portion and the other end side connection portion. .   The angle varying means has a rotation shaft portion, the one end side connection portion and the other end side connection portion of the connection mechanism are rotatably connected by the rotation shaft portion, and the connection state maintaining means is the one end side. The lifting / lowering scaffold according to claim 1, wherein a connecting state between the connecting portion and the other end side connecting portion is maintained.