JP3047641B2 - Construction site cover equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction site covering device for covering a construction site with a sheet.

[0002]

2. Description of the Related Art In general, a building such as a house is constructed after building a scaffold at a construction site. However, simply building a scaffold will cause materials and the like to get wet during rainfall. For this reason,
As a measure against rain in the event of rainfall, a structure in which a roll-up type waterproof sheet is attached to the scaffold has already been devised (for example,
JP-A-3-72168). Hereinafter, this structure will be briefly described.

[0003] As shown in FIGS. 33 and 34, a building 252,
A scaffold 260 formed by appropriately using the horizontal cloth 254, the roots 256, and the scaffold plate 258 is erected. On the side surface of the scaffold 260, a box-shaped case 262 is bridged between adjacent buildings 252. A waterproof sheet 264 is accommodated in the case 262 in a wound state. The upper end surface of the case 262 has a slit 2
66 are formed, and the waterproof sheet 264 is pulled out from the slit 266 to cover the scaffold 260.

[0004]

However, in the case of this structure, a gap 2 is provided between adjacent waterproof sheets 264.
68 (see FIG. 33), so that water leaks from the gap 268. Therefore, there is a problem that the rain prevention effect, which is the original purpose, cannot be sufficiently obtained.

The present invention has been made in view of the above circumstances, and has as its object to provide a cover device for a building site that can reliably prevent rain from leaking.

[0006]

According to the first aspect of the present invention, there is provided a cover device for a construction site according to the present invention, which is standing on a pair of opposing sides of a scaffold that is erected around the construction site from all sides. A triangular support frame fixed at, a pair of seat drives that are bridged between the hypotenuses of the pair of support frames, and are provided movably along each hypotenuse, and a sheet draw-out end attached to the seat drive. The seat base end is locked to the winding shaft that is locked and urged in the winding rotation direction, and a plurality of sheets are arranged along the longitudinal direction of the seat drive on the remaining set of sides of the scaffold. And a sheet drive moving means for moving the pair of sheet drives in a direction approaching each other against the urging force of the sheet winding device. By arranging the location vertically or is offset back and forth is characterized in that the polymerization of the side edge portions of the sheets adjacent to each other.

According to a second aspect of the present invention, there is provided a cover device for a building site according to the first aspect of the present invention, wherein the sheet is a flexible and belt-shaped reinforcing band attached along a longitudinal direction of the sheet. A long reinforcing member attached along the width direction and having a predetermined rigidity,
It is characterized by being reinforced by:

[0008]

According to the first aspect of the present invention, when the installation of the cover device at the construction site on the upper end of the scaffold is completed, the cover device at the construction site is opened. In other words, the sheet is completely wound around the winding shaft of the sheet winding device by the urging force, and the sheet drive in which the plurality of sheet drawing ends are locked is also held at the lower end of the oblique side of the support frame. You. As a result, a space is formed above the construction site surrounded by the scaffolding, where no members or the like exist and there are no obstacles. Therefore, since there is no hindrance to the work of hanging a large object such as a unit for housing composition, it can be said that the present invention is particularly effective at a construction site where a house or the like is constructed by the unit construction method. Further, when it comes to rain during construction work at the construction site, the pair of seat drives are simultaneously or independently moved by the seat drive moving means in a direction approaching each other along the oblique side of the support frame. Along with this, the sheet is pulled out against the urging force of the sheet winding device. Therefore, the construction site is covered by a plurality of sheets.

Here, in the present invention, the adjacent sheet winding devices are arranged so as to be offset vertically and / or longitudinally so that the side edges of the adjacent sheets are overlapped. There is no gap between them.

According to the second aspect of the present invention, a first aspect is provided.
In the present invention described above, since the belt-like reinforcing band is attached to the sheet along the longitudinal direction of the sheet, the sheet is reinforced in the longitudinal direction. In addition, since the reinforcing band is flexible, there is no problem when the sheet is wound by the sheet winding device.

Further, since a long reinforcing member is attached to the sheet along the sheet width direction, the sheet is reinforced in the width direction. Moreover, since the reinforcing member has a predetermined rigidity, the sheet does not sag. Therefore, it is possible to prevent a gap from being generated in the overlapped side edge portion due to each of the adjacent sheets sagging.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cover apparatus 10 for a construction site according to an embodiment of the present invention will be described below with reference to FIGS.

[Explanation of Overall Schematic Configuration] As shown in FIG. 1, a scaffold 12 is erected around a building site from four sides around the building site. In FIG. 1, scaffold 1
2 is shown only from two directions. The scaffold 12 is a steel pipe scaffold, and includes a plurality of buildings 14 erected at predetermined intervals, a plurality of cross cloths 16 orthogonal thereto, and a plurality of scaffold plates (not shown). It is configured by appropriately combining members such as the arm tube 17 and connecting them with a joint.

At the upper end of the scaffold 12, a cover device 10 for a building site according to the present embodiment is installed. The cover device 10 at the building site includes a pair of main frames 18.
And a pair of seat drives 20 bridged over these
A drive roller 22 for connecting the sheet drive 20 to the main frame 18, a roll sheet winding device 26 for winding the roll sheet 24 drawn by the sheet drive 20 into a layer, and a wire drum 28 for moving the sheet drive 20. And a balance controller 30 for adjusting the balance between the left and right operations of the seat drive 20. The details will be described below in this order.

[Explanation of the main frame 18] As shown in FIG.
Has an isosceles triangular king post truss structure in a front view. That is, the lower chord material 32 located on the bottom side
A string member 32 composed of A and the upper chord member 32B located on the hypotenuse
And an abdominal member 34 composed of a vertical member 34A and a diagonal member 34B connecting the two, and are assembled so as to have an isosceles triangle shape in a front view by using a plurality of members. The lower chord 32A, the upper chord 32B, and the vertical chord 34
A, the diagonal members 34B are all circular pipes.

Next, a description will be given of a joint structure for connecting the string members 32 and the string member 32 and the belly member 34.

FIG. 3 shows a multi joint 36 connected in four directions. This multi joint 36
Are used in the part viewed from the arrow 3 in FIG. Therefore, although a multi-joint having a different connection direction is used in other portions, since the structure itself is the same, the multi-joint 3 shown in FIG.
6 will be described.

The multi-joint 36 includes a straight pipe 36A having a straight circular pipe shape and a straight pipe 36A.
And a universal pipe 36B connected by a pin 38 so as to be rotatable with respect to. A recess is formed around the pin 38 in the straight pipe 36A. The straight pipe 36A is used for connecting the string members 32 to each other. The universal pipe 36B is used for connecting the chord material 32 and the belly material 34. The outer diameters of the straight pipe 36A and the universal pipe 36B are all the same, and correspond to the inner diameters of the chord member 32 and the belly member 34. Therefore, the chord member 32 and the belly member 34 can be inserted into the straight pipe 36A and the universal pipe 36B.

A hook-shaped keyway 40 is formed at each open end of the straight pipe 36A and the free pipe 36B. Correspondingly, as shown in FIGS. 4 and 5, a reinforcing circular pipe 44 is inserted and welded to the outer peripheral surface of the connection side end of the chord material 32 and the belly material 34. The lock lever 42 is located at the position where the reinforcing circular pipe 44 is disposed.
Are arranged.

The lock lever 42 includes the chord member 32 and the belly member 3.
4 is disposed at the inner diameter position of the open end of the support shaft 4
And the reinforcing circular pipe 44 fitted to the upper and lower ends of the support shaft 46.
A pair of washers 48 arranged on the outer peripheral surface of the
8 on the upper end surface.

The support shaft 46 has cylindrical bosses 46A at both ends in the axial direction, and a thin portion 46B formed by chamfering the axial middle portion from both sides of the peripheral surface. Thin part 46
The outer diameter of B matches the diameter of the circular hole of the key groove 40. The thickness of the thin portion 46 </ b> B matches the groove width of the key groove 40.

A lever 50 projecting in the radial direction is welded to the upper end of the boss 46A on the upper side of the support shaft 46. A protrusion 52 is provided at the longitudinal end of the lever portion 50.
Are fitted and fixed. Lock holes 54 are formed in the peripheral surfaces of the chord material 32 and the belly material 34 corresponding to the projections 52.

Between the lever portion 50 and the reinforcing circular tube 44,
The upper washer 48 is interposed in a non-fixed state. Also,
A lower washer 48 is welded to the outer periphery of the lower boss 46A of the support shaft 46. This lower washer 48 is
It functions as a retainer during rotation of 6.

In the lock lever 42 described above, first, the lever portion 50 is positioned at a position perpendicular to the axis of the chord material 32 or the abdominal material 34 (the state shown in FIG. 5A). The thin part 46B is caused to enter. When the support shaft 46 reaches the circular hole of the key groove 40, the lever 5
By rotating 0 by 90 °, it is positioned coaxially with the chord material 32 or the abdominal material 34 (the state shown in FIG. 5B). As a result, the thin portion 46B cannot pass through the keyway 40, so that the multi joint 36 and the chord material 32 or the abdominal material 3
4 will be connected. After the connection is completed, the projection 52 of the lever portion 50 is fitted into the lock hole 54 to prevent the rotation of the lever portion 50.

As shown in FIG. 2, a pair of guide pulleys 56 are arranged on the main frame 18. Specifically, the guide pulley 56 is connected to one of the upper chord members 32.
B are attached inside the multi joints located at both ends in the longitudinal direction. Guide pulley 56
Are arranged coaxially (see FIG. 6) so that wires 118 and 120 to be described later can be wound therearound. Note that the guide pulley 56 shown in FIG. 6 is attached to a portion that becomes a vertex in the main frame 18 shown in FIG.

Furthermore, each upper chord material 3 of the main frame 18
Guide rails 58 are attached to the inside of each 2B. As shown in FIGS. 11 and 12, each guide rail 58 is a hollow structure having a substantially rectangular cross section at right angles to the longitudinal direction, and is fixed by inserting a cock pin 60 into each upper chord member 32 </ b> B of the main frame 18. Have been. The guide rails 58 are formed as one linear member by connecting a plurality of guide rails by inserting and fitting the opposite ends.

[Description of the Seat Drive 20] As shown in FIG. 1, the seat drive 20 is bridged between upper chord members 32B of the pair of main frames 18 facing each other. As shown in FIG. 7, the seat drive 20 includes triangular span frames 62 (shown in an enlarged manner in FIG. 8) arranged at predetermined intervals. 64 and upper chord 6
6 is inserted and connected to form an outer shell. As a result, the seat drive 20 is
A, an upright surface 20B, and a slope 20C.

Further, the adjacent support frames 6 on the bottom surface 20A and the upright surface 20B of the seat drive 20 are provided.
Between the two, a diagonal member 68 is arranged. Thus, the bottom surface 20A and the upright surface 20B of the seat drive 20 have a planar truss structure. More specifically, as shown in FIG. 9, the angle β between the bottom surface 20A of the seat drive 20 and the upright surface 20B is defined assuming that the angle between the lower chord material 32A and the upper chord material 32B of the main frame 18 is α. , Β = 90 ° −α. The angle formed between the bottom surface 20A and the upright surface 20B is determined for the following reason.

That is, the seat drive 20 includes:
Its own weight acts in the direction of arrow A in the figure, and the biasing force of the spring 182 of the roll sheet winding device 26 described later acts in the direction of arrow B in the figure. The seat drive 20 must have a predetermined resistance to these loads, and it is preferable that no bending moment is generated. For this reason, the upright surface 20 against its own weight
In order to cope with B, and to cope with the urging force by the bottom surface 20A, the two are formed as a flat truss structure and the angle between them is determined as described above. In addition, as can be seen from the above, it is not necessary to form the slope 20C with the flat truss structure.

On the other hand, end brackets 7 shown in FIG.
0 are fitted and connected respectively. The end bracket 70 has a connecting pipe 72 whose axis is bent in a U-shape.
And a connecting plate 74 having a trapezoidal plate shape fixed to a longitudinally intermediate portion of the connecting pipe 72.

[Description of Drive Roller 22] FIG. 11 shows the drive roller 22 connected to the connection plate 74 of the end bracket 70. As shown in this figure, the drive roller 22 includes a trapezoidal plate-shaped substrate 80, a rectangular pulley support plate 82 disposed at right angles to the rear end of the substrate 80, and both side portions of the pulley support plate 82. A pair of side plates 84 disposed on the substrate 80, a pair of stiffeners 85 for reinforcing the fixed state of the substrate 80 and the pulley support plate 82,
It has. In the center of the substrate 80, a shaft support hole 8 coaxial with a shaft support hole 76 (see FIG. 10) formed in the connection plate 74 of the end bracket 70 of the seat drive 20.
6 are formed.

The connection structure between the drive roller 22 and the sheet drive 20 will be described below. FIG.
As shown in FIG. 2, a cylindrical guide 88 having an internal thread formed on the inner peripheral surface thereof is fixed to the shaft support hole 86 of the substrate 80 in a state where the guide 88 is inserted up to an intermediate portion in the axial direction. On the other hand, a cylindrical drive end boss 78 is fixed to the shaft support hole 76 of the connecting plate 74 in a state where it is inserted. Then, after the spacer 90 and the drive end boss 78 are inserted into the guide 88 in this order, a flat washer 92 is disposed on the upper end surface of the drive end boss 78. In this state, the bolt 94 is screwed into the guide 88, whereby the drive roller 2
2 and the seat drive 20 are connected.

When both are connected, the end bracket 70 of the seat drive 20 is
Relative to the substrate 80 by a predetermined amount around the guide 88. Thereby, the seat drive 2
The right and left play (movement difference) at the time of movement of 0 is absorbed.

A pair of upper and lower guide pulleys 96 are pivotally supported on both sides of the back surface of the pulley support plate 82. That is, as shown in FIG. 13, small shaft supporting holes 98 are respectively formed at the four corners of the pulley support plate 82, and the shaft 100 is fitted into these small shaft supporting holes 98. A large diameter portion 10 is provided at an intermediate portion of the shaft 100 in the axial direction.
0A is formed, and functions as a stopper at the time of insertion into the small shaft support hole 98. A female screw 100B is formed at an end of the shaft 100 on the side opposite to the insertion direction in the axial direction. A bush 102 is inserted into an axially intermediate portion of the shaft 100, and a guide pulley 96 is inserted into an outer peripheral portion thereof. Then, in this state, after the flat washer 104 is fitted, the bolt 106
Is screwed into the female screw 100B of the shaft 100.
Thus, the guide pulley 96 is configured to be supported by the pulley support plate 82.

The guide pulley 96 pivotally supported by the pulley support plate 82 in this manner is connected to the main frame 18 described above.
The guide rail 58 attached to the upper chord material 32B is disposed so as to vertically sandwich the guide rail 58 (see FIG. 12). Therefore, these two pairs of guide pulleys 96 are used as guide rails 58.
, The drive roller 22 is guided by the guide rail 58.
It is designed to run along.

In the above-described main body of the drive roller 22, the substrate 80 and the pulley support plate 82 have a single-plate structure. However, the present invention is not limited to this, and FIGS. 14A, 14B,
A two-plate structure as shown in FIG. FIG.
In the drive roller 108 shown in FIG. 4A, a substrate as a main body and a pulley support plate are configured by arranging L-shaped plate members vertically. FIG.
In the drive roller 110 shown in FIG.
4 (A), and stiffeners 1 on both sides
The main body is formed by fixing the main body 12. Further, in the drive roller 114 shown in FIG. 14C, in addition to the structure of FIG. 14B, a main body is formed by fixing a pair of stiffeners 116 at the center of the upper surface. Each of the drive rollers 108, 110, and 114 is characterized in that a reinforcing effect can be obtained as compared with the drive roller 22.

[Explanation of the Wire Drum 28] Structure of the Wire Drum
1 is connected to the wire drum 28 through
5, the structure of the wire drum 28 will be described.

The wire drum 28 has a frame (not shown), and this frame is attached to a position below the scaffold 12. The wire drum 28 includes a pair of left and right spools 122 and 124. Left and right spools 12
The cylindrical inner cylinder 12 is provided at the center of the center side
6 are respectively fixed in a penetrating state. The pair of inner cylinders 126 are fitted in the outer cylinder 130. The peripheral surface of the outer cylinder 130 is fixed to a frame (not shown). Therefore, the left and right inner cylinders 126 are
0 can be frictionally rotated.

Further, other inner cylinders 132 are respectively fixed to the shaft cores of the outer side plates of the left and right spools 122 and 124 in a penetrating state. Each inner cylinder 132 is fitted in an outer cylinder 134 having the same configuration as above. Therefore, each inner cylinder 132 is rotatable with respect to each outer cylinder 134.

A key groove 132A is formed on the inner peripheral surface of the inner cylinder 132. A key 13 formed on a peripheral surface of a shaft 138 of a worm wheel 136 disposed outside the spools 122 and 124 is inserted into the key groove 132A.
8A is engaged. A worm 140 is engaged with the peripheral surface of the worm wheel 136. Warm 14
A driven gear 144 is coaxially fixed to an end of the worm shaft 142 of the “0”. The teeth of the drive gear 146 are engaged with the teeth of the driven gear 144. Therefore, when the handle 148 attached to the shaft of the drive gear 146 is turned clockwise in the state shown in FIG. 15, the driven gear 144, the worm 140, and the worm wheel 136 are turned.
The driving force is transmitted to the left and right spools 122 and 124 in synchronization with each other.

The wire arrangement is then connected to the wire drum 28 and the pair of seat drive 20 and the configuration of the wire 118, 120 will be described.

As shown in FIG. 16, one end of a left wire 118 (shown by a broken line) is locked to the right spool 124, and a right wire 120 (shown by a solid line) is locked to the left spool 122. One end is locked.

After the wire 120 wound around the left spool 122 is pulled upward from the spool 122 as it is, the two pulley pairs 150 arranged coaxially are arranged.
Is wound around one of the pulleys. Accordingly, the wire 120 is guided to the right along the horizontal cloth 16 and reaches a position below the right main frame 18 via the balance controller 30 described later.

A return pulley 152 is disposed below the main frame 18, and the return pulley 152 guides the wire 120 upward again. Here, the wire 120 is branched. One wire 120A is wound around a pulley inside the guide pulley 56 on the lower side of the main frame 18 and then inverted by a pulley inside the guide pulley 56 on the upper side of the main frame 18 so that the sheet drive 20 on the front side is turned around. Are locked at one end in the longitudinal direction. Also, the other wire 120B
Is wound around a pulley outside the lower guide pulley 56 on the lower side of the main frame 18, and is then wound around the pulley outside the guide pulley 56 on the upper side of the main frame 18 without being inverted, and Seat drive 20
Are locked at one end in the longitudinal direction.

The wire 118 wound around the right spool 124 is not wound around the balance controller 30, but the other way of routing is the same as that of the right wire 120. Therefore, the left wire 11
8 is also branched after being folded by the folding pulley 152, and one wire 118A is connected to the sheet drive 2 on the near side.
0 and the other wire 118
B is locked to the other longitudinal end of the seat drive 20 on the back side.

Thus, both sheet drives 20 can be simultaneously moved by one wire drum 28.

[Description of Balance Controller 30] FIG.
6, the balance controller 30 through which the right wire 120 passes will be described below with reference to FIG.

As shown in the figure, the balance controller 30 has an L-shaped mounting flange 154, and a substantially elliptical support plate 156 is arranged on one side of the mounting flange 154. Guide pulleys 158 are respectively supported on the back surfaces of both ends in the longitudinal direction of the support plate 156. The pair of guide pulleys 158 includes
The right wire 120 is wound.

An L-shaped control lever 160 is mounted on the surface of the support plate 156 at the longitudinal middle surface. The grip portion of the control lever 160 is knurled, and a male screw 160A is formed on the peripheral surface of the bent portion connected to the support plate 156. The boss 162A of the lock lever 162 is screwed into the male screw 160A of the control lever 160. A washer (not shown) is interposed between the boss 162A of the lock lever 162 and the mounting flange 154.

According to the above-described balance controller 30, the rotation angle of the support plate 156 is determined by rotating the control lever 160, and in this state, the lock lever 162 is rotated and tightened to maintain the rotation angle. And the support plate 156 is the mounting flange 1
It is configured to move to the 54 side and be pressed against and fixed to the back surface of the mounting flange 154. As a result, the right wire 120 is narrowed according to the rotation angle, and the longitudinal displacement of the pair of seat drives 20 in the longitudinal direction with respect to the left end is corrected.

[Description of Roll Sheet Winding Device 26] Structure of Winding Device As shown in FIGS. 18 and 19, the roll sheet winding device 26 has a bottomed cylindrical case 166. L-shaped mounting brackets 168 are disposed on both axial end surfaces of the case 166, respectively. Case 166
To attach the mounting bracket 168 to the
6, a circular fitting hole 170 is formed on each of both axial end surfaces, and a circular bulging portion 168A that fits into the fitting hole 170 is formed on the inner surface of the mounting bracket 168. The mounting bracket 168 is fixed to both end surfaces in the axial direction of the case 166 with screws 172 in a state where the bulging portion 168A is fitted into the fitting hole 170.

On the other hand, in the case 166, a drum 174 as a cylindrical winding shaft is disposed coaxially with the case. A support shaft 176 protrudes from a shaft core portion of the partition wall 174A at both axial ends of the drum 174, and is supported by a ball bearing 178 press-fitted into the bulging portion 168A of the mounting bracket 168. Note that a nut 180 is screwed to the tip of the support shaft 176. Thus, the drum 174 is rotatably supported by the pair of mounting brackets 168.

Further, the bulging portion 1 of the mounting bracket 168
A spring 182 is housed between the inner surface of the 68A and the partition 174A. The inner end of the mainspring 182 is locked on the peripheral surface of the support shaft 176 of the drum 174. The outer end of the mainspring spring 182 is connected to the locking portion 1 protruding from the bulging portion 168A of the mounting bracket 168.
84. Therefore, the mainspring 182
Urges the drum 174 in the direction of arrow C (the winding direction of the roll sheet 24 described later) in the state shown in FIG.
In this embodiment, the drum 174 is urged in the winding direction of the roll sheet 24 by the mainspring 182. However, the present invention is not limited to this, and a coil spring may be incorporated instead of the mainspring.

Structure of Roll Sheet A slit-shaped notch 186 (see FIG. 18) is formed in a part of the peripheral surface of the case 166 described above.
The roll sheet 24 is inserted through the inside of the roll 6.
Hereinafter, the configuration of the roll sheet 24 will be described.

As shown in FIGS. 20A and 20B,
The roll sheet 24 is a long rectangular sheet in plan view, and is made of a polyester-based lightweight material. Therefore, the roll sheet 24 has excellent waterproof performance.

A flexible vertical reinforcing band 188 is sewn to the periphery of the roll sheet 24. In addition, vertical reinforcement band 1
Reference numeral 88 also denotes two (1
Sewn). The roll sheet 24 is reinforced in the longitudinal direction by the vertical reinforcing band 188. Since the vertical reinforcing band 188 is flexible, the drum 1
There is no resistance when it is wound into a layer 74.

FIG. 20A, FIG. 21A,
As shown in (B), the roll sheet 24 is provided with a slack preventing bar 190 as a reinforcing member at predetermined intervals in the longitudinal direction. Sag prevention bar 190
Is made of a relatively hard synthetic resin material such as plastic, the surface of which is covered with a mounting auxiliary sheet 192, and is attached to the roll sheet 24 by sewing in this state.

The slack preventing bar 190 is also sewn to the end of the roll sheet 24 on the drawing side, but the slack preventing bar 190 here has a hook 194 ( A hook hole 196 (see FIGS. 22A and 22B) for attaching the same is formed.

With the above-described slack prevention bar 190,
The roll sheet 24 is reinforced in the width direction. Since the slack preventing bar 190 is arranged along the width direction of the roll sheet 24, there is no resistance when the roll sheet 24 is wound around the drum 174 in a layered manner.

Rain gutter structure As shown in FIG. 23, the case 166 of the above-mentioned roll sheet winding device 26 has a cylindrical projection 198 (see FIG. 19) on the lower surface of one end in the axial direction. Are also shown). The protrusion 198 protrudes downward from the case 166. A drain hole 200 is formed in the axis of the projection 198. A drain hose 202 is pushed in and attached to the outer peripheral surface of the projection 198. The tip of the drain hose 202 is guided outside the scaffold 12. Therefore, the rainwater that has flowed down the surface of the roll sheet 24 and entered the case 166 is discharged from the drain hole 200.
From the drainage hose 202 and drained out of the scaffold 12.

[0061] As shown in SEQ diagram of the roll sheet 24 (A), the roll sheet take-up device 26 described above, are sequentially arranged along the longitudinal direction of the sheet drive 20. At this time, the adjacent roll sheet winding devices 26 are vertically displaced (see FIG. 23B).

The side edges 24A of the roll sheets 24 adjacent to each other are overlapped in a plan view. Therefore, no gap is formed between the side edges 24A of the roll sheet 24.

In the following, the procedure of assembling the cover device 10 at the construction site to the scaffold 12 will be briefly described, and then the operation of this embodiment will be described.

First, as shown in FIG.
Using horizontal cloth 16, arm tube 17, scaffolding board, joint, etc.
The scaffold 12 is erected so as to surround the construction site from all sides. Next, the main frame 18 is mounted on a pair of opposing sides of the scaffold 12 so as to be in an upright state. To do this, it is only necessary to insert each main frame 18 into the upper end of the building 14. At this time, the guide pulleys 56 are arranged so as to face each other. After the main frame 18 is assembled to the building 14, it is preferable that a single tube (not shown) for preventing falling is attached to a central portion (a position where the king post is located) of one of the main frames 18.

Next, the branch pulley pair 150, the return pulley 152, the wire drum 28, the balance controller 3
Attachment of a wire-related component such as 0 to the scaffold 12 is performed. At the same time, the roll sheet winding device 26 is also mounted near the upper end of the building 14 in a vertical offset arrangement (the state shown in FIG. 24B). At this time, the side edges 24A of the roll sheets 24 adjacent to each other are arranged so as to overlap each other.

Next, the drive roller 22 is inserted into each guide rail 58 of the main frame 18. In this state, the guide pulley 96 of the drive roller 22 sandwiches the guide rail 58. Next, the pair of sheet drives 20 are assembled to the drive rollers 22. On this occasion,
Each seat drive 20 is assembled so that the assembled state is as shown in FIG. That is, the seat drive 20 is arranged so that the bottom surface 20A having the planar truss structure is along the upper chord material 32B of the main frame 18, and the upright surface 20B having the planar truss structure is also vertically aligned. To the drive roller 22. The sheet drive 20 and the drive roller 22
May be connected to the guide rail 58 of the main frame 18 first.

Thereafter, the leading end of the roll sheet 24 is pulled out from each roll sheet winding device 26, and the hook 194 locked in the hook hole 196 is locked to the pair of sheet drives 20. Thereby, the mainspring 18
The urging force of No. 2 acts on the seat drive 20, and the seat drive 20 is held in a lowered state.

Next, as shown in FIG.
18 and 120 move from the wire drum 28 to the mainspring 18
2 and is pulled out against the urging force of
0, the return pulley 152, and the guide pulley 56 of the main frame 18 are sequentially wound. At this time, the right wire 120 in the state shown in FIG. 16 is wound around a pair of guide pulleys 158 of the balance controller 30. Finally, the ends of the wires 118 and 120 are locked to both ends of the pair of drive rollers 22 in the longitudinal direction.

In this way, the cover device 1 at the building site
0 is attached to the upper end of the scaffold 12. In a state where the assembly is completed, the cover device 10 at the building site is in an open state. That is, the roll sheet 24 is completely wound around the roll sheet winding device 26.

Then, the necessary number of units 2 are sent to the building site.
04 is carried in and its installation work is performed. That is,
As shown in FIG. 25A, the units 204 are sequentially carried into a construction site and installed at predetermined locations.

Here, when rain falls during the work, the cover device 10 at the construction site is closed. That is, the handle 148 of the wire drum 28 is rotated by the operator. Thereby, the drive gear 14
6, the left and right spools 122 and 124 rotate in synchronization with the winding direction via the driven gear 144, the worm 140, and the worm wheel 136. Therefore, the left and right wires 1
18 and 120 are wound on spools 122 and 124. Therefore, the pair of branch pulleys 150 and the return pulley 15
2. Via the guide pulley 56 of the main frame 18,
The pair of seat drives 20 are pulled toward each other. At this time, each sheet drive 20 is pulled along the pair of guide rails 58 against the urging force of the spring 182 of the roll sheet winding device 26. At this time, if the moving state of the longitudinal ends of the seat drive 20 is slightly shifted, the shift is eliminated by rotating the control lever 160 of the balance controller 30 by a predetermined amount. Until the closing operation of the roll sheet 24 is completed in this manner,
The handle 148 is rotated. The roll sheet 24
Even if the handle 148 is released after the closing operation of the left and right spools 122 and 12 is completed, the engagement between the worm wheel 136 and the worm 140 provides a braking effect.
4 does not spin.

The state in which the roll sheet 24 is closed (see FIG. 2)
5B, the side edges 24A of the roll sheets 24 adjacent to each other are superimposed on each other, as shown in FIG.

Therefore, even if it rains in this state, the rainwater surely flows down the surface of the roll sheet 24 as shown in FIG. 23 without leaking from between the side edges 24A of the roll sheet 24. The rainwater that has flowed down flows into the inside of the case 166 from the slit-shaped notch 186 of the case 166 of the roll sheet winding device 26. The rainwater that has flowed in is drained from the drainage hole 200 of the case 166 to the outside of the scaffold 12 through the drainage hose 202.
That is, the case 166 also has a function as a rain gutter.

In the case where the rainfall is heavy, the roll sheet 24 is supposed to sag with the weight of rainwater. However, since the slack prevention bar 190 is sewn on the roll sheet 24 along the width direction, the roll sheet 24 does not slack.

As described above, in this embodiment, the cover device 10 of the construction site is attached to the upper end of the scaffold 12 erected so as to surround the construction site from all sides. Since they are configured to overlap, it is possible to reliably prevent rain from leaking to the building site.

In the present embodiment, not only the roll sheet 24 is reinforced with the vertical reinforcing band 188, but also the slack preventing bar 190 is sewn along the width direction thereof. It is possible to prevent a gap from being generated between the adjacent side edges 24A due to the sagging of the roll sheet 24. Therefore, the effect of preventing rain from leaking to the building site can be further ensured.

Further, in this embodiment, the case 166 of the roll sheet take-up device 26 is configured to also function as a rain gutter, and the rainwater flowing into the case 166 is used for the scaffold 12.
Since it is configured to drain the water outside, it is possible to guide the rainwater that has poured onto the roll sheet 24 to a desired place (for example, a drain gutter). This effect will be further briefly described with reference to FIG. FIG. 26 shows a drainage state in the case of using the roll sheet winding device 26 provided with a case having no rain gutter function. In this case, rainwater falls below the case. In the embodiment, such a situation can be prevented from occurring.

Further, in the conventional structure shown in FIGS. 33 and 34, even when the waterproof sheet 264 is in the wound state,
The installation of the unit 204 cannot be performed because the main building of the scaffold 260 exists, but in the cover device 10 of the construction site according to the present embodiment, the roll sheet 24 is in the rolled state (the cover device 10 of the construction site is fully opened). In this case, there is no member (purlin) that interferes with the unit 204 to be installed, so that there is an effect that the installation work of the unit 204 is not hindered. In other words, it can be said that the cover device 10 of the construction site according to the present embodiment is particularly effective at the construction site when a house or the like is constructed by the unit construction method.

In this embodiment, in order to overlap the side edge 24A of the adjacent roll sheet 24, FIG.
(A) and (B), the roll sheet take-up device 26 is vertically offset and arranged. However, the present invention is not limited to this, and as shown in FIGS. The side edges 24A adjacent to each other may be configured to be superposed by offsetting the front and rear sides 24.

In this embodiment, the drive roller 22 and the wires 118 and 120 serve as sheet drive moving means.
Although the wire drum 28 for winding the wires 118 and 120 is used, the invention is not limited to this. For example, a motor for driving and rotating four guide pulleys 96 attached to the drive roller 22 is attached to the drive roller 22 via gears. Alternatively, the seat drive 20 may be moved by remote control.

Further, in this embodiment, the wires 118, 1
Although a configuration in which the pair of seat drives 20 are towed using the pair 20 is adopted, the invention is not limited to this, and a rope or the like may be used, for example.

Further, in the present embodiment, the pair of sheet drives 20 is configured to move synchronously when the wire drum 28 is rotated. However, the present invention is not limited to this, and the pair of spools 122 and 124 of the wire drum 28 are not limited to this. May be configured to be independently drivable, whereby the seat drives 20 may be independently moved. The configuration in this case will be briefly described below with reference to FIGS. The same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 28 shows a pair of spools 206 and 20.
8 is a partially exploded perspective view of a wire drum 210 that can be driven independently. As shown in this figure, the driving force from drive gear 146 is applied to spools 206 and 208.
A pair of driven gears 212 for transmitting the gears are configured to be movable in the axial direction, respectively. That is, the axial base end 214A of the worm shaft 214 has a square cross section perpendicular to the axis. This base end 214A
Is fitted in a square through hole 216 formed in the shaft core of the driven gear 212. In the fitted state, the driven gear 212
4 is slidable along the base end 214A. Accordingly, in a state where one driven gear 212 is slid (the state shown by the two-dot chain line in FIG. 28), the driven gear 212 and the drive gear 146 are in a non-meshed state, so that the driving force of the drive gear 146 reduces the other driven gear. 212 only. Note that the driven gear 212 is slid in such a manner that the square pillar-shaped base end 214A is
6, without being limited to the configuration to fit
A configuration using serrations, keys, or the like may be used.

Next, the structure of the wire when the wire drum 210 having the above structure is used will be described.

As shown in FIG. 29, the wire drum 2
One end of a wire 218 is wound around the lower spool 206 of the wire 10. The other end of the wire 218 is connected to a connector case 23 of one wire connector 236 described later.
8. And this connector case 2
Two wires 220 and 222 are locked to 38. The middle part between the two wires 220 and 222 is
After being turned back by the branch pulley pair 224, the drawing direction is branched into two branches.

One wire 220 is connected to the return pulley 2
After passing through one pulley 26, it is wound around the balance controller 30. Balance controller 3
The wire 220 passing through the second pulley 22
It is folded upward at 8. Then, this wire 22
After being wound around a pair of guide pulleys 56 of the right main frame 18, 0 is locked to one longitudinal end of the seat drive 20 on the near side in FIG. 29.

Further, after the other wire 222 is wound around the pair of branch pulleys 224, it is guided upward without going to the return pulley 226. Thereafter, the wire 222 is wound around a pair of guide pulleys 56 of the left main frame 18, and is then locked to the other longitudinal end of the seat drive 20 on the near side in FIG.

Thus, when the lower spool 206 rotates, the front sheet drive 20 moves along the pair of main frames 18.

The same is true for the upper spool 208. The wire 23 having one end locked to the spool 208
The other end of 0 (shown by a broken line) is locked in a connector case 242 of the other wire connector 240 described later.
The connector case 242 has two wires 232 and 23
4 is locked at one end. These wires 232, 2
The other end of 34 has substantially the same configuration as that described above,
In FIG. 29, the seat drive 20 is locked at both ends in the longitudinal direction of the seat drive 20 on the rear side. Therefore, the upper spool 20
When the seat 8 rotates, the front seat drive 20 moves along the pair of main frames 18.

Next, the configuration of the wire connectors 236 and 240 will be described. FIG. 30 is an external perspective view of one wire connector 236. Note that the other wire connector 240 has the same configuration. The wire connector 236 includes a rectangular parallelepiped block-shaped connector case 238. An intermediate portion in the longitudinal direction of the connector case 238 is opened, and a pair of U-shaped spring seats 244 and 246 are arranged in this opening in an opposed state.

A compression coil spring 247 is interposed between one spring seat 244 and one end 238A of the connector case 238, and the other spring seat 246 and the other end 23 of the connector case 238.
8B, two compression coil springs 248 and 249 are interposed. Correspondingly, the connector case 23
8 has a free lever 207 on the surface of one end 238A.
Are rotatably mounted, and two free levers 209 and 211 are rotatably mounted on the surface of the other end 238B of the connector case 238.
The vicinity of the end of the wire 218 is inserted through the free lever 207, one end 238A of the connector case 238, the compression coil spring 247, and one spring seat 244. Note that the end of the wire 218 is wound in layers and stopped by a wire 213. Similarly, a pair of free levers 209 and 211 and a connector case 238
The other end 238B, the compression coil springs 248, 24
9 and the other spring seat 246, the end portions of the wires 220 and 222 are respectively inserted. The ends of the wires 220 and 222 are wound in layers like the above and are stopped by wires 215 and 217.

After the wires 218, 220 and 222 are adjusted to the desired length,
A mechanism for holding the wires 218, 220, 222 in this state is built in. That is, as shown in FIGS. 31 and 32, the other end 23 of the connector case 238 is provided.
8A has a tapered opening 219 formed therein. FIGS. 31 and 32 show only the holding mechanism for the wire 218 in the wire connector 236 shown in FIG. The lock piece 221 divided into three is loosely fitted around the wire 218 in the opening 219. Each lock piece 221 has teeth formed at the axis thereof, and contacts the wire 218 by three members integrally.
Is prevented from moving in the longitudinal direction.

One end of the above-described compression coil spring 247 abuts and locks on the end faces of these lock pieces 221, and the other end of the compression coil spring 247 abuts and locks on the spring seat 244. Therefore, the lock piece 221 is pressed and urged in a direction to enter the inside of the opening 219. When the lock piece 221 has completely entered the opening 219, the tip 221A is projected. The free lever 207 described above can be brought into contact with the tip 221A. Therefore, when the lock of the lock piece 221 is to be released,
7 to rotate the lock piece 221 to the compression coil spring 2
What is necessary is to withdraw from the inside of the opening 219 against the urging force of 47.

The above-described wire connector 236 (wire connector 240) has a single wire 218 (wire 23).
0) and two wires 220, 222 (wires 232, 2
34) and wires 218, 220, 222 (wires 230, 23) depending on the size of the building.
2, 234) can be said to have a function of adjusting the length to a desired length and holding it in that state.

[0095]

As described above, the cover device for a building site according to the present invention according to the first aspect of the present invention is arranged adjacent to each other by arranging the sheet winding devices adjacent to each other so as to be offset vertically and / or back and forth. Since the side edges of the sheets are superimposed, there is an excellent effect that it is possible to reliably prevent rain leakage from between the side edges of the adjacent sheets.

[0096] A cover device for a building site according to the present invention according to claim 2 is the flexible and belt-like reinforcing band attached along the longitudinal direction of the seat in the present invention according to claim 1, and the sheet width direction. The sheet is reinforced by a long reinforcing member attached along with and having a predetermined rigidity. In addition to the reinforcing effect of the sheet itself, the overlapping state of the side edges of the sheet is reliably maintained. This has an excellent effect that the effect of preventing rain leakage can be further ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a cover device for a building site according to the present embodiment.

FIG. 2 is a perspective view showing an appearance of the main frame of FIG.

FIG. 3 is an enlarged perspective view showing a multi-joint in a portion taken along line 3 of FIG. 2;

FIG. 4 is a perspective view showing a connection structure between a chord material or abdominal material and a multi joint in the main frame of FIG. 1;

5 (A) is a perspective view showing the lock lever of FIG. 4 in an unlocked state, and FIG. 5 (B) is a perspective view showing the lock lever in a locked state.

FIG. 6 is a sectional view showing a guide pulley attached to the main frame of FIG. 2;

FIG. 7 is a perspective view showing an appearance of the seat drive of FIG. 1;

FIG. 8 is an enlarged perspective view showing a span frame of the seat drive of FIG. 7;

FIG. 9 is an explanatory diagram for explaining a method of determining an angle between a bottom surface and an upright surface of the seat drive in FIG. 7;

FIG. 10 is an enlarged perspective view showing an end bracket in the seat drive of FIG. 7;

FIG. 11 is a perspective view showing an appearance of the drive roller of FIG. 1 in a state where the drive roller is assembled to a guide rail.

FIG. 12 is a partially exploded sectional view showing a connection structure between the drive roller and the end bracket of the seat drive in FIG. 11;

FIG. 13 is an exploded cross-sectional view showing an assembly structure of a guide pulley in the drive roller of FIG.

FIGS. 14A, 14B, and 14C are external perspective views showing a modified example of the drive roller in FIG. 11;

FIG. 15 is a partially exploded perspective view showing the structure of the wire drum of FIG. 1;

FIG. 16 is a perspective view showing how to wind a wire wound around the wire drum of FIG. 15;

FIG. 17 is a perspective view showing an appearance of the balance controller of FIG. 1;

FIG. 18 is a perspective view illustrating an appearance of the roll sheet winding device of FIG. 1;

19 is a cross-sectional view showing an internal structure near an end in the longitudinal direction of the roll sheet winding device shown in FIG.

20 (A) is a plan view of the roll sheet of FIG. 18, and FIG. 20 (B) is a sectional view taken along line 20 (B) of FIG. 20 (A).

21 (A) is an enlarged view of a portion taken along line 21 (A) of FIG. 20 (A), and FIG. 21 (B) is FIG. 21 (A).
3 is a side view of the state shown in FIG.

22 (A) is an enlarged view of a portion taken along line 22 (A) of FIG. 20 (A), and FIG. 22 (B) is an enlarged view of FIG. 22 (A).
3 is a side view of the state shown in FIG.

FIG. 23 is a schematic view showing a rain gutter structure in the roll sheet winding device of FIG.

24 (A) is a plan view showing an arrangement configuration of the roll sheet of FIG. 20, and FIG. 24 (B) is a plan view of FIG.
FIG. 4 is a side view of the state shown in FIG.

FIG. 25 (A) is an explanatory diagram for explaining a work state when it is not raining, and FIG. 25 (B) is an explanatory diagram for explaining a work state when it is raining.

FIG. 26 is an explanatory diagram for describing an effect provided by the rain gutter function of the case of FIG. 23 in comparison with a case having no rain gutter function.

FIG. 27A is a side view showing a modified example of the arrangement of the roll sheets shown in FIG. 24;
(B) is a plan view thereof.

28 is a partially exploded perspective view corresponding to FIG. 15, showing a modified example in which the driven gear is configured to be movable in the axial direction in the wire drum shown in FIG.

FIG. 29 is a perspective view corresponding to FIG. 16, showing how to route wires when the wire drum shown in FIG. 28 is used.

30 is an external perspective view showing a wire connector used when the wire drum shown in FIG. 28 is used.

FIG. 31 is a partial vertical sectional view of the wire connector shown in FIG. 29;

FIG. 32 is a side view of the wire connector of FIG. 31 as viewed from the side.

FIG. 33 is an external perspective view showing a conventional structure.

FIG. 34 is a cross-sectional view of the waterproof sheet of FIG. 33 and a case for winding the waterproof sheet, as viewed from the side in FIG. 33;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cover device of a construction site 12 Scaffold 18 Main frame (support frame) 20 Sheet drive 22 Drive roller (Seat drive moving means) 24 Roll sheet 24A Side edge 26 Roll sheet winding device 28 Wire drum (Seat drive moving means) 118 Wire (seat drive moving means) 120 Wire (seat drive moving means) 174 Drum (winding shaft) 182 Spring spring 188 Vertical reinforcement band 190 Bar for preventing slack (reinforcing member)

Claims (2)

(57) [Claims] 1. A triangular support frame fixed in an upright state on a pair of opposing sides of a scaffold erected so as to surround a building site from four sides, and between a hypotenuse of the pair of support frames. A pair of sheet drives that are bridged and provided movably along the respective oblique sides, and a sheet base is fixed to the winding shaft that is locked in the sheet driving end and urged in the winding rotation direction. A plurality of sheet winding devices whose ends are locked and which are arranged along the longitudinal direction of the sheet drive on the remaining set of sides of the scaffold; Sheet drive moving means for moving in a direction approaching each other against the force, and by arranging the sheet winding devices adjacent to each other up and down or back and forth, Covering device as building site, characterized in that the polymerization of the side edges of the adjacent sheets. 2. The sheet comprises: a flexible and band-like reinforcing band attached along the sheet longitudinal direction; and a long reinforcing member attached along the sheet width direction and having a predetermined rigidity. The construction site covering device according to claim 1, wherein the covering device is reinforced by: