JP2019027135A - Steel tower protection device for air blasting and construction method - Google Patents

Abstract

To provide a steel tower protection device for air blasting to allow a spray nozzle for air blasting to be moved easily.SOLUTION: A steel tower protection device 100 for air blasting used for surface preparation of power transmission line towers and like is provided with an upper member 10 forming a top wall, a lower member 20 forming a bottom wall, and a protection sheet 30. An upper edge of the protection sheet 30 is connected to a circumference of the upper member 10 while a lower edge of the protection sheet 30 is connected to a circumference of the lower member 20. Both vertical edges of the protection sheet 30 are connected with a fastener 32 extending in a vertical direction to form a cylindrical shape of which a vertical direction is an axis and has some looseness in a circumferential direction or the vertical direction.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an apparatus for curing so that abrasives, peeled paint, iron rust, etc. (hereinafter referred to as “abrasives”, etc.) are not scattered when air blasting is performed in keren work such as a power transmission tower. The present invention relates to an air blast tower curing device including a work booth for performing work by inserting a gun of an air blast device from the outside of a transparent sheet covering a part, and a construction method using the same.

  Conventionally, when cleansing such as power transmission towers is performed by air blasting, the inside of the transparent sheet etc. is visible to prevent environmental pollution due to scattering of abrasives, etc., or to collect and reuse expensive abrasives Various methods have been proposed in which a booth with a side wall that can be used is cured so as to cover the construction part and air blasting is performed therein.

  For example, in Patent Document 1, a sheet is stretched so that the upper and lower ends of the sheet are fixed with clamps on the outer periphery of a pair of upper and lower end surface members attached to a steel frame made of L-shaped steel that extends in the vertical direction, and is provided on the sheet. There has been proposed a steel surface treatment booth in which an air blast torch is inserted through an opening (hole). The booth for surface treatment of Patent Document 1 is configured to sandwich an L-shaped steel frame by combining upper and lower end surface members with a plurality of parts.

  Patent Document 2 proposes a steel surface treatment booth having a configuration similar to that of Patent Document 1, in which a plurality of sheets provided in the circumferential direction are joined by a hook-and-loop fastener.

  Further, Patent Document 3 proposes an airtight cover for preventing scattering, which is a side-down cylinder attached to an L-shaped horizontal member. This hermetic cover is provided with a working opening on a cylindrical side wall made of a transparent hard acrylic resin, and the working side opening is made to rotate relative to the left and right side surfaces so that the working opening is made of a steel shaft. It is configured to be able to spray air blast from the entire circumference of the steel frame by rotating around.

JP 2012-180576 A JP 2014-15750 A JP 2017-74667 A

  However, the steel surface treatment booths of Patent Document 1 and Patent Document 2 have a problem that the opening cannot be moved because the sheet is fixed by a clamp. The booth of Patent Document 2 can move the torch up and down along the hook-and-loop fastener by opening the connecting part provided with the hook-and-loop fastener and inserting the air blast torch. There is a problem that cannot be moved.

Further, the airtight cover of Patent Document 3 has a problem that even if the air blast injection nozzle can be moved around the horizontal steel axis, it cannot be moved in the axial direction of the steel frame.
This invention is made | formed in view of the said subject, and aims at provision of the steel tower curing apparatus for air blast which can move the injection nozzle of an air blast to an up-down direction and a horizontal direction easily.

  The invention made in order to solve the above problems is an air blast tower curing device consisting of a work booth that covers a work target part at the time of air blast work in Keren construction of a steel tower, an upper member that forms a ceiling wall, A lower member that forms a bottom wall and an upper end connected to the periphery of the upper member, a lower end connected to the periphery of the lower member, and a cylindrical fastener that extends in the vertical direction by a hook-and-loop fastener extending in the vertical direction The curing sheet is characterized by having a slack in the circumferential direction or the vertical direction.

  Thus, in the steel blast curing apparatus for air blasting of the present invention, the cylindrical curing sheet is provided with slack in the circumferential direction or the vertical direction, so the air blast inserted through the opening in which the hook-and-loop fastener is opened The spray nozzle of the device can be moved within the range of loosening of the curing sheet.

The elastic sheet has an elastic rope inserted through a plurality of rope insertion holes arranged along the upper edge of the curing sheet, and the upper edge of the curing sheet is formed by winding the elastic rope around the peripheral wall of the upper member. It is preferable that it is connected to the member. Thus, since the curing sheet is fixed by winding the elastic rope around the upper member, the curing sheet can be easily fixed to the upper member, and the gap between the upper edge of the curing sheet and the upper member It is possible to suppress the leakage of the abrasive used for air blasting from the gap.
Moreover, since the rope insertion hole can be moved along the elastic rope, the curing sheet can be moved in the circumferential direction, and the movable range of the spray nozzle can be further expanded.

  It is preferable that the rope insertion hole is provided in a fold provided by folding the upper end portion of the curing sheet in a folding line extending in the vertical direction, and the periphery is sealed by eyelets. By carrying out like this, it can prevent that the abrasive | polishing agent etc. which were used for air blast leak from the rope penetration hole to the exterior.

  The peripheral wall of the upper member is preferably provided in a cylindrical shape. By doing so, the elastic rope can be easily wound, and the curing sheet can be more easily moved in the circumferential direction.

The tower curing apparatus for air blasting of the present invention is attached to a pillar material extending in the vertical direction of the tower, and the upper member is a flat upper cylindrical member composed of a pair of half cylindrical members, the upper cylindrical member and the pillar. An annular cloth-like upper sheet that closes the opening between the members, and a plurality of tension bolts that extend from the upper cylindrical member to extend radially inward in order to fix the upper cylindrical member to the column member; Including those having
In this way, the upper cylindrical member is composed of a halved cylindrical member, so that it can be easily attached to the pillar material extending in the vertical direction, and can be reduced in weight by being divided, so that it is easy to lift up to the work site of the steel tower. is there.
In addition, the upper member is fixed to the pillar member of the steel tower by a tension bolt that extends from the upper cylindrical member so as to expand and contract radially inward, so that the upper member is attached to the pillar member of various diameters. Can do.
Furthermore, since the opening between the upper cylindrical member and the pillar of the steel tower is closed with an annular sheet (upper sheet), the upper member can be reduced in weight, and its transportation, installation and removal are easy.

  The steel tower curing apparatus for air blasting of the present invention is attached to a pillar material extending in the vertical direction of the steel tower, and the lower member is a flat lower cylindrical member composed of a pair of halved cylindrical members, the lower cylindrical member and the pillar. An annular cloth-like lower sheet that closes the opening between the members, and a plurality of tension bolts that extend from the lower cylindrical member to extend radially inward in order to fix the lower cylindrical member to the column member. Including what you have.

The pair of halved cylindrical members of the lower cylindrical member includes a pair of inner halved cylindrical members provided on the radially inner side and a pair of outer halved cylindrical members provided on the radially outer side. It is preferable that the edge portion is fixed to the lower member so as to be sandwiched between the inner half cylindrical member and the outer half cylindrical member.
By carrying out like this, the lower edge part of a curing sheet can be easily attached or detached with respect to a lower member.

  The lower sheet is preferably composed of two halved annular half lower sheets. By doing so, it is possible to easily wrap and collect the abrasive etc. accumulated on the sheet.

The upper member may be configured to be suspended from a steel tower with a rope, and the lower member may be configured to be suspended from the upper member with a rope.
By carrying out like this, the said steel blast tower curing apparatus for air blasting can be used for the location without a column material, such as hanging on the horizontal material of a steel tower. Moreover, since the lower member can rotate with respect to the upper member, the injection nozzle inserted from the opening of the hook-and-loop fastener can be moved in a wider range.

In the air blast tower curing apparatus in which the upper member is suspended by a rope, the lower member is preferably composed of a pair of bottomed cylindrical members and has a lid member that closes the upper opening of the lower member.
By doing so, it is possible to collect the abrasive without scattering the abrasive or the like by accumulating the abrasive or the like on the lower member, covering it with a lid.

  The pair of half-cylindrical members of the upper member are preferably connected so as to be openable and detachable by a one-touch release hinge. By doing so, the upper member can be assembled and divided more easily. In particular, in an air blast tower curing apparatus of the type that is attached to a pillar material, one of the two joints of the pair of halved cylindrical members is closed while one of the joints connected by the one-touch release hinge is closed. Remove the connection, rotate the two halved cylindrical members around the one-touch release hinge, and open the other joint to attach the two halved cylindrical members to the column material. Can be removed.

In a steel tower curing device for air blasting that is attached to a pillar material, the pair of inner half cylindrical members and the pair of outer half cylindrical members of the lower member are arranged with four one-touch release hinges in two rows inside and outside. It is preferable that the two hinge members are connected to each other so as to be rotatable.
By carrying out like this, a lower member can be easily attached or detached with respect to the pillar material of a steel tower, and the lower edge part of a curing sheet can be attached or detached more easily.

  The present invention includes a steel tower curing method for air blasting, in which any of the above-mentioned air blast steel tower curing apparatuses is used to perform a kelen work on a steel tower.

  As described above, according to the steel tower curing apparatus for air blasting of the present invention, the air blast spray nozzle can be easily moved both vertically and horizontally.

It is a perspective view which shows a mode that the steel tower curing apparatus for air blast which concerns on 1st Embodiment of this invention was attached to the pillar material of the steel tower. It is the disassembled perspective view which showed the upper member vicinity of the steel tower curing apparatus for air blast shown in FIG. It is the principal part expansion perspective view which showed the one-touch release hinge of the upper member shown in FIG. It is the disassembled perspective view which showed the lower member of the steel tower curing apparatus for air blast shown in FIG. It is a perspective view of the lower member shown in FIG. It is a principal part expansion perspective view which shows the double hinge of the lower member shown in FIG. It is a perspective view which shows a mode that the steel tower curing apparatus for air blast which concerns on 2nd Embodiment of this invention was attached to the horizontal member of the steel tower. It is a disassembled perspective view of the upper member shown in FIG. It is a disassembled perspective view of the lower member shown in FIG. It is a perspective view which shows the state which opened the cover member of the lower member shown in FIG. It is a perspective view which shows the state which closed the cover member of the lower member shown in FIG. It is the front view seen from the front end side of the tension bolt of FIG. 2, (b) The longitudinal cross-sectional view of a contracted state, (c) The longitudinal cross-sectional view of the expansion | extension state.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. The present invention is not limited to the following embodiment.

(First embodiment)
FIG. 1 shows a steel tower curing apparatus 100 for air blasting according to a first embodiment of the present invention. The steel blast curing apparatus 100 for air blast according to the first embodiment is attached to a pillar material A of a steel tower formed by assembling a steel pipe, and mainly includes a connecting portion of a steel pipe that is difficult to perform a keren operation unless using air blasting. Used to cover.
The air blast tower curing device 100 has a substantially columnar shape with the column A as an axis, an upper member 10 forming a top wall, a lower member 20 forming a bottom wall, and a curing sheet 30 covering the periphery in a cylindrical shape. And an elastic rope 34 for fixing the curing sheet 30 to the upper member 10.

  The upper member 10 has a circular shape in plan view as shown in FIG. 1, and as shown in FIG. 2, a flat cylindrical upper cylindrical member 40 that constitutes the outer periphery thereof, and the upper cylindrical member 40 and a tower column. A circular upper sheet 50 that closes the opening D between the materials A, and four tension bolts 41 that extend from the upper cylindrical member 40 so as to extend radially inward in order to fix the upper cylindrical member 40 to the pillar material A. , 41, 41, 41.

  As shown in FIG. 2, the upper cylindrical member 40 includes a pair of halved cylindrical members 48, 48, and both end edges in the circumferential direction are configured to be detachable by a pair of one-touch release hinges 42, 42.

  The half-cylinder members 48 and 48 are provided by using a metal material such as iron, stainless steel, or aluminum alloy by sheet metal, machine, welding, or the like. The half-cylindrical members 48, 48 are each composed of a semi-cylindrical peripheral wall portion 45, a pair of reinforcing strips 47, 47 consisting of round bars welded along the upper end edge and the lower end edge of the peripheral wall portion 45, and the peripheral wall portion Two suspension fittings 43, 43 projecting upward from the upper edge of 45, two suspension fittings 44, 44 projecting downward from the lower edge of the peripheral wall portion 45, and 2 passing through the peripheral wall portion 45 inward and outward. Two support nuts 45b and 45b welded to the through holes 45a and 45a (see FIG. 12B), and the substantially total length in the circumferential direction of the peripheral wall 45 along the upper edge of the inner surface of the peripheral wall 45 A belt-shaped hook-and-loop fastener 46 is provided.

As shown in FIG. 2, the halved cylindrical members 48, 48 are formed in a cylindrical upper cylindrical member 40 by connecting one-touch release hinges 42 provided at both ends in the circumferential direction.
FIG. 3 shows a state in which the male fitting 42a and the female fitting 42b of the one-touch release hinge 42 are separated. The male fitting 42a slides in the cylinder 42f and the cylinder 42f and advances and retreats from both upper and lower ends of the cylinder. A pair of latches 42d, 42d, handles 42c, 42c for operating the latches 42d, 42d, a pair of L-shaped grooves 42g, 42g for sliding the handle 42c to detach the male fitting 42a and the female fitting 42b, It has. A coil spring (not shown) is provided inside the cylinder 42f, and urges the latches 42d and 42d to the outside of the syringe.
The female fitting 42b includes a pair of cylindrical bearings 42e and 42e that pivotally support a latch 42d that protrudes from the cylinder 42f.
When separating the male fitting 42a from the female fitting 42b, the handle 42c is operated against the coil spring, and the latch 42d is pulled out from the bearing 42e.
When the male fitting 42a is connected to the female fitting 42b, the handle 42c is rotated around the cylinder 42f along the L-shaped groove 42g with the cylinder 42f inserted between the pair of bearings 42e of the female fitting 42b. The latch 42d is inserted into the bearing 42e using the force of the coil spring.

  As shown in FIG. 12, the tension bolt 41 includes a full screw bolt 41b provided on the proximal end side, a cylindrical portion 41c provided on the distal end side of the full screw bolt 41b, and a U-shape provided on the distal end of the cylindrical portion 41c. Support metal fittings 41d. The tension bolt 41 passes the base end of the full screw bolt 41b through the through hole 45a and the support nut 45b of the peripheral wall portion 45, and is fixed to the peripheral wall portion 45 by the fixing nut 41a.

  As shown in FIGS. 12 (b) and 12 (c), the cylindrical portion 41c is formed by screwing the full screw bolt 41b around the female screw provided on the inner peripheral surface on the base end side, thereby In contrast, the full length of the tension bolt 41 is expanded and contracted.

  The support fitting 41d is pivotally supported by a lid portion that closes the tip of the cylindrical portion 41c, and is provided to be rotatable around the axis of the tension bolt 41. The support metal fitting 41d is covered with a soft resin cover 41e at both ends of the U-shape contacting the pillar material A.

  As shown in FIG. 2, the upper sheet 50 includes a flat cylindrical shape retaining frame 51 and a sheet portion 52 that is stretched on the inner peripheral surface of the shape retaining frame 51 so as to close the opening inside the shape retaining frame 51. And.

  The shape-retaining frame 51 is made of a flexible resin plate that is curved in the thickness direction to have an annular shape, and is formed in an annular shape by connecting both ends in the circumferential direction with hooks 51a and 51b and hook-and-loop fasteners 51c and 51d. When these are removed, cracks 54 are formed between both ends in the circumferential direction. A belt-shaped hook-and-loop fastener 56 that is engaged with the hook-and-loop fastener 46 on the inner surface of the upper cylindrical member 40 is attached along the lower edge of the outer surface of the shape retaining frame 51.

For example, the sheet portion 52 is formed in a ring-like shape by cutting and sewing a polyester woven fabric or the like, and aligns both ends in the circumferential direction with both ends in the circumferential direction of the shape-retaining frame 51. A peripheral edge is sewn along the lower end of the inner surface. The seat portion 52 is provided with a center hole 53 for passing the pillar material A of the steel tower at the center, and both end edges in the circumferential direction are detachably provided by male and female hook-and-loop fasteners 52a and 52b. The middle hole 53 is configured such that a belt-like collar portion 52c is erected on the periphery, and both ends of the collar portion 52c are attached and detached by hook and loop fasteners. The pillar material A is accommodated in the inner hole 53 through the crack 54 of the shape retaining frame 51 and the cut 55 of the sheet portion 52.
In addition, if the sheet | seat part 52 is a cloth-like thing, well-known things, such as a woven fabric, a nonwoven fabric, a knitted fabric, and a resin-made sheet | seat, can be used suitably.

  As shown in FIG. 1, the curing sheet 30 includes three sets of curing sheets 30a, 30b, and 30c. The curing sheet 30a (same for 30b and 30c) is, as shown in FIG. 2, a sheet main body 31 made of a rectangular transparent vinyl sheet, and a belt-like shape attached along both circumferential edges of the sheet main body 31. A hook-and-loop fastener 32 is provided. The curing sheet 30 is connected to the sheet body 31 of the adjacent curing sheet by a hook-and-loop fastener 32 and is formed in a cylindrical shape. An incision that is opened and closed by a hook-and-loop fastener 33 from the lower edge to the lower edge of the upper edge is provided in the middle portion of the seat body 31 in the circumferential direction.

  As shown in FIG. 2, the curing sheet 30 is provided with a large number of pleat portions 35 by bonding the overlapping inner surfaces by folding the upper edge portion into two by a fold line 35 a extending in the vertical direction. A rope insertion hole 36 having a circular through hole whose peripheral edge is sealed by the eyelet 36a is provided. By providing the pleat portion 35, the curing sheet 30 is slackened in the circumferential direction.

  The elastic rope 34 is made of a rubber cord covered with a cloth, and hooks 34a formed by bending a metal wire are provided at both ends. Curing sheets 30a, 30b, and 30c are fixed to the upper member 10 by winding an elastic rope 34 passed through the rope insertion hole 36 around the outer periphery of the upper member 10 and engaging hooks 34a and 34a at both ends.

  As shown in FIG. 5, the lower member 20 is provided in a circular shape in plan view, and includes a flat lower cylindrical member 60 composed of a pair of half-cylindrical members 61, 62, a lower cylindrical member 60, and a tower column A An annular cloth-shaped lower sheet 80 that closes the opening between the four cylindrical bolts 73 and four tension bolts 73 that extend from the lower cylindrical member 60 to extend radially inward to fix the lower cylindrical member 60 to the pillar material A; 73, 73, 73 (see FIG. 4).

  As shown in FIG. 4, the lower cylindrical member 60 includes a pair of outer half-cylindrical members 61 and 62 provided on the radially outer side and a pair of inner half-cylindrical members 71 and 72 provided on the radially inner side. ing. The inner half-cylindrical members 71 and 72 and the outer half-cylindrical cylindrical members 61 and 62 are connected to and pivoted at one end in the circumferential direction by a double hinge 64 so that two-to-four pieces are integrated into four halves. The cylindrical members are each configured to rotate with respect to the double hinge 64.

  The outer half cylinder members 61 and 62 are formed in a flat semi-cylindrical shape by bending a metal plate in the thickness direction. The outer half-cylindrical member 61 includes a male fitting 65 (see FIG. 6) at an end connected to the double hinge 64, and a receiving fitting 63b of the catch clip 63 on the opposite end. The outer half-cylindrical member 62 includes a bearing 62b (see FIG. 6) at an end connected to the double hinge 64, and a catch 63a for the catch clip 63 at the opposite end.

  As shown in FIG. 4, the inner half-cylindrical members 71 and 72 are provided at a body part 70a formed by bending a metal plate material in the thickness direction into a flat semi-cylindrical shape, and at both upper and lower ends of the body part 70a. Ribs 70b and 70b, a hook-and-loop fastener 70c attached to the inner surface of the main body 70a, and a hook 70d provided on the upper edge of the main body 70a.

  As shown in FIG. 4, the tension bolt 73 is provided so as to extend inward from the inner surface of the main body 70a of the inner half cylindrical member 71, and a support nut 73a welded to the main body 70a. A full screw bolt 73b, a cylindrical portion 73c, and a support fitting 73d are provided.

  As shown in FIG. 6, the double hinge 64 has a total of four inner and outer pairs that engage with the latches 65d, 65d, 75d, and 75d of the male fittings 65 and 75 of the outer half cylindrical member 61 and the inner half cylindrical member 71, respectively. The four bearings 64d, 64b, 64b, 64b, the outer half member 60, the outer half member 62, and the inner half member 72 that engages with the bearings 62b, 62b, 72b, 72b of the inner half member 72, a total of four latches 64d, 64d, 64d, 64d.

The pair of half outer cylindrical members 61 and 62 are connected to each other by a catch clip 63 at the end opposite to the double hinge 64 (see FIG. 4), and the pair of inner half cylindrical members 71 and 72 are double hinges 64. It is connected by the catch clip 71a at the end opposite to (see FIG. 4).
By opening and closing the half outer cylindrical members 61, 62, the lower end portion of the curing sheet 30 is sandwiched between the half outer cylindrical members 61, 62 and the inner half cylindrical members 71, 72 as shown in FIG. can do.
In addition, the code | symbol 61a in FIG. 4 is a top-and-bottom display.

  As shown in FIGS. 4 and 5, the lower sheet 80 has an annular shape with a neck hole 83, and two halved annular halved lower sheets 81 and 82 are connected by male and female hook and loop fasteners 82 f and 82 e. Formed. The halved lower sheets 81 and 82 respectively have a shape retaining frame 80a, a hook-and-loop fastener 80b attached to the outer surface of the shape retaining frame 80a, a sheet portion 80c formed of a polyester woven cloth, and the like, and a neck hole 83. It has collar straps 81h and 82h provided around the periphery and wound around the pillar material A. The collar cords 81h and 82h are connected in a ring shape with hook-and-loop fasteners provided at both ends, and are fixed to the pillar material A in a state where the two are overlapped.

(Air blast tower curing method)
Next, a steel tower curing method for air blasting using the air blast steel tower curing apparatus 100 will be described.
When the steel tower curing apparatus 100 for air blasting is attached to the pillar material A of the steel tower, a pair of half cylinders in a separated state are provided above the portion of the pillar material A targeted for air blasting as shown in FIG. The upper cylindrical member 40 is formed by covering the members 48 and 48 with the pillar material A and connecting the one-touch release hinges 42 and 42 at both ends. Subsequently, while supporting the upper cylindrical member 40 at an appropriate position, the cylindrical portion 41c of the tension bolt 41 is screwed and the tension bolt 41 is extended until the support fitting 41d abuts against the pillar material A. The four tension bolts 41,... Extend so as to have substantially the same length, and fix the upper cylindrical member 40 to the column member A.

  Next, the upper sheet 50 is accommodated in the upper cylindrical member 40 from above, the surface fasteners 56 of the upper sheet 50 are engaged with the surface fasteners 46 of the upper cylindrical member 40, and the surface fasteners 52 a and 52 b of the seat portion 52 are attached. In addition to engaging, hook and loop fasteners at both ends of the collar portion 52c are engaged to connect both ends of the seat portion 52.

  When the attachment of the upper member 10 is completed, as shown in FIG. 4, the lower member 20 is attached at an appropriate interval downward from the upper member 10. The lower member 20 is attached by first connecting the pair of inner half-cylindrical members 71 and 72 to the double hinge 64 so as to cover the column A, and subsequently connecting the pair of outer cylindrical members 61 and 62 to the double hinge. 64. Then, the inner half cylindrical members 71 and 72 and the outer half cylindrical members 61 and 62 are closed, and the catch clips 71a and 63 are engaged to make the lower cylindrical member 60 cylindrical.

  In this state, while supporting the cylindrical member 60 at an appropriate position, the cylindrical portion 73c of the tension bolt 73 is screwed to extend the tension bolt 73 until the support fitting 73d comes into contact with the column member A of the steel tower. The member 60 is fixed to the pillar material A. The halved lower sheets 81 and 82 are placed on the tension bolts 73, and the hook-and-loop fasteners 81e and 82f are engaged to form the lower sheet 80 in an annular shape. The lower sheet 80 is fixed to the pillar material A by winding the collar cords 81h and 82h around the pillar material A and engaging the both ends with hook-and-loop fasteners.

Next, the elastic rope 34 of the curing sheet 30 a is wound around the upper member 10, the hooks 34 a and 34 a at both ends are engaged, and the curing sheet 30 a is attached to the upper member 10. Similarly, the curing sheets 30b and 30c are attached to the upper member 10 while being appropriately shifted in the circumferential direction so that the sheet main bodies 31 do not overlap each other. Curing sheets 30a, 30b, and 30c are formed in a cylindrical shape by connecting both ends of the sheet body 31 with hook-and-loop fasteners 32.
Thus, since the curing sheet 30 is attached to the upper member by the elastic rope 34, the curing sheet 30 can be easily attached, and an air blasting abrasive or the like is applied to the upper edge of the sheet main body 31 and the upper member 10. Leakage from the gap can be suppressed. In the present embodiment, since the three elastic ropes 34 are wound, leakage of the abrasive or the like can be suppressed more reliably.

The lower edge of the seat body 31 is sandwiched between the outer half cylindrical members 61 and 62 and the inner half cylindrical members 71 and 72 by opening and closing the outer half cylindrical members 61 and 62 and the catch clip 63. At this time, the lower edge of the sheet main body 31 is sandwiched in a state in which the sheet main body 31 has a slack in the vertical direction. This completes the mounting of the air blast tower curing device 100 to the pillar material A. Thus, since the lower member 20 is configured to be able to open and close the outer half-cylindrical members 61 and 62 and the inner half-cylindrical members 71 and 72, the lower edge of the sheet body 31 can be easily sandwiched.

  The air blasting operation is performed by removing a part of the hook and loop fastener 32 or 33 of the curing sheet 30 to form an opening, and inserting an air blast injection nozzle into the opening. Since the hook-and-loop fasteners 32 and 33 extend in the vertical direction, an opening can be appropriately provided according to the height of the work target location. Further, since the curing sheet 30 is slack in both the circumferential direction and the vertical direction, the opening into which the injection nozzle is inserted can be moved in any of the vertical direction, the front-rear direction, and the left-right direction. Further, the opening through which the injection nozzle is inserted can also be moved in the circumferential direction by moving the rope insertion hole 36 relative to the elastic rope 34 and moving the sheet body 31 in the circumferential direction.

  When the air blasting operation is completed, the lower edge of the sheet main body 31 and the hook-and-loop fasteners 32 and 33 are appropriately opened, and the abrasive and the like accumulated in the lower sheet 80 are collected. At this time, since the lower sheet 80 can be separated into the half-lower sheets 81 and 82, it is easy to wrap around the abrasive and the like.

(Second Embodiment)
FIG. 7 shows a steel tower curing apparatus 200 for air blast according to a second embodiment of the present invention. As shown in FIG. 7, the steel tower curing apparatus 200 for air blast mainly includes an upper member 210, a lower member 220, and a curing sheet 30.
Note that in the second embodiment, members that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The upper member 210 is formed into a flat, covered cylindrical shape as shown in FIG. 8 by assembling and welding a metal plate material, wire material, metal fitting, or the like mainly made of sheet metal or machining. The upper member 210 includes a pair of covered halved cylindrical members 211 and 212.

The half cylindrical members 211 and 212 are respectively a main body portion 210a obtained by bending a metal plate in the thickness direction, a rib 210b provided along a lower edge of the inner surface of the main body portion, and upper and lower end edges of the main body portion 210a. Reinforcing bars 210d and 210d made of a metal round bar welded along the vertical axis, suspension fittings 210e and 210f, a male fitting 42a of a one-touch release hinge 42 provided on the circumferential edge of the main body 210a, and a female And a metal fitting 42b.
The half-cylinder cylindrical members 211 and 212 are provided with semicircular top plates 211a and 212a, respectively. The end edges are connected to each other so as to be inserted.

  Similar to the upper member 210, the lower member 220 is mainly formed of a metal material, and is formed into a flat bottomed cylindrical shape including a pair of half cylindrical members 221 and 222 as shown in FIGS. Yes.

The half cylindrical members 221 and 222 each have a half cylindrical main body 220a, a rib 220b welded along the upper edge of the inner surface of the main body, and a locking bolt 220c protruding upward from the upper surface of the rib 220b. The reinforcing strips 220d and 220d made of metal round bars welded along the upper and lower edges of the outer surface of the main body 220a, the hanging bracket 220f extending upward from the upper edge of the main body 220a, and the circumferential direction of the main body 220a The male metal fitting 42a and the female metal fitting 42b of the one-touch release hinge 42 provided in the edge of the are provided.
The half-cylinder cylindrical members 221 and 222 are provided with semicircular bottom plates 221a and 222a, respectively, and an edge forming the diameter of the bottom plate 221a on a connecting member 222b provided by sandwiching an edge forming the diameter of the bottom plate 222a between two strip plates Are connected to each other.

As shown in FIG. 7, the upper member 210 is suspended from the horizontal member C of the steel tower by the hanging bracket 210f and the rope 70, and the lower member 220 is suspended from the upper member 210 by the rope 6, the carabiner 6a, and the hanging bracket 220f. Be lowered. The curing sheet 30 is attached to the upper member 210 and the lower member 220 by elastic ropes 34 at both the upper edge and the lower edge. The diagonal member B of the steel tower can be dodged by passing through the openings of the hook-and-loop fasteners 32 and 33.
Since the lower member 220 is suspended by the rope 6, the lower member 220 swings with respect to the upper member 210, so that the openings provided in the hook-and-loop fasteners 32 and 33 are also more than the range due to the looseness of the curing sheet 30. The movable range increases.
The lower member 220 also holds the receiving bag 9 made of a plastic bag or the like by the elastic rope 34, and collects the abrasive that falls downward from the gap between the lower member 220 and the sheet body 31.

  As shown in FIG. 10, the air blast tower curing apparatus 200 includes a lid member 223 that closes the lower member 220. The lid member 223 is made of a circular plate having a diameter slightly smaller than the inner diameter of the main body 220a of the lower member 220, and is configured to be folded in two by a hinge (not shown). The lid member 223 is screwed into the four engagement holes 223a through which the locking bolts 220c of the lower member 220 are inserted and the locking bolts 220c inserted through the engagement holes 223a to fix the lid member 223 to the lower member 220. A resin nut 223b and a wire 223c for connecting the cap nut 223b to the handle 223d are provided.

  After performing the air blasting operation using the air blast tower curing apparatus 200, the lower member 220 is covered with the lid member 223, and the accumulated abrasive and the like are collected.

  As mentioned above, the steel tower curing apparatus for air blast of this invention is not restricted to said embodiment, For example, an upper member and a lower member do not need to be circular. The curing sheet may be attached to the upper member without depending on the elastic rope, and may be 2 sheets or less, or 4 sheets or more. The upper member and the lower member may be attached to the steel tower without using a tension bolt or a rope. Also in the first embodiment, the lower member may be suspended from the upper member by a rope. A member other than the one-touch release hinge can be used to connect the half cylinder members.

Air blast tower curing equipment 100,200
Upper member 10, 210
Lower member 20, 220
Curing sheet 30
Hook and loop fastener 32
Elastic rope 34
Pleats 35
Polyline 35a
Rope insertion hole 36
Eyelet 36a
Upper cylindrical member 40
Tension bolt 41
One-touch release hinge 42
Half cylindrical member 48
Upper sheet 50
Rope 6, 7
Lower cylindrical member 60
Double hinge member 64
Outer half cylinder member 61, 62
Inner half cylindrical members 71 and 72
Strut bolt 73
Lower seat 80
Half lower sheet 81, 82
Half cylindrical member 211,212
Half cylindrical members 221, 222
Lid member 223
Column material A
Diagonal material B
Horizontal material C
Opening D

Claims (13)

At the time of air blast work in Keren construction of the steel tower, it is a steel tower curing device for air blast consisting of a work booth that covers the work target part,
An upper member forming the top wall;
A lower member forming a bottom wall;
An upper end is connected to the periphery of the upper member, a lower end is connected to the periphery of the lower member, and a curing sheet connected in a cylindrical shape with the vertical direction as an axis by a hook-and-loop fastener extending in the vertical direction,
The aging tower curing apparatus for air blasting, wherein the curing sheet has a slack in a circumferential direction or a vertical direction. An elastic rope inserted through a plurality of rope insertion holes arranged along the upper edge of the curing sheet;
2. The tower curing apparatus for air blasting according to claim 1, wherein an upper end edge of the curing sheet is connected to the upper member by winding the elastic rope around a peripheral wall of the upper member.   3. The air blast tower curing according to claim 2, wherein the rope insertion hole is provided in a fold provided by folding the upper end portion of the curing sheet in a folding line extending in the vertical direction, and the periphery is sealed by eyelets. apparatus.   The peripheral wall of the upper member is a tower curing apparatus for air blasting according to any one of claims 1 to 3, wherein the peripheral wall is provided in a cylindrical shape. It is attached to the pillar material extending in the vertical direction of the steel tower,
The upper member includes a flat upper cylindrical member composed of a pair of half cylindrical members, an annular cloth-like upper sheet that closes an opening between the upper cylindrical member and the column member, and the upper cylindrical member The tower curing apparatus for air blasting according to any one of claims 1 to 4, further comprising a plurality of tension bolts that extend from the upper cylindrical member in a radially inward direction so as to be fixed to a column member. . It is attached to the pillar material extending in the vertical direction of the steel tower,
The lower member includes a flat lower cylindrical member composed of a pair of half cylindrical members, an annular cloth-shaped lower sheet that closes an opening between the lower cylindrical member and the column member, and the lower cylindrical member as the column. The tower curing apparatus for air blasting according to any one of claims 1 to 5, further comprising a plurality of tension bolts that extend from the lower cylindrical member in a radially inward direction so as to be fixed to a material.   The pair of halved cylindrical members of the lower cylindrical member includes a pair of inner halved cylindrical members provided on the radially inner side and a pair of outer halved cylindrical members provided on the radially outer side. The tower curing apparatus for air blasting according to claim 6, wherein an edge portion is fixed to the lower member such that the edge portion is sandwiched between the inner half cylindrical member and the outer half cylindrical member.   The said lower sheet | seat consists of two half annular | circular shaped half lower sheet | seats, The steel tower curing apparatus for air blasting of Claim 6 or Claim 7.   5. The air blast tower curing according to claim 1, wherein the upper member is configured to be suspended from a steel tower by a rope, and the lower member is configured to be suspended from the upper member by a rope. apparatus.   10. The air blast tower curing apparatus according to claim 9, wherein the lower member includes a pair of bottomed cylindrical members and includes a lid member that closes the upper opening.   6. The air blast tower curing apparatus according to claim 5, wherein the pair of half cylindrical members of the upper member are connected to be detachable and attachable by a one-touch release hinge.   The pair of inner half-cylindrical members and the pair of outer half-cylindrical members of the lower member can be rotated with each other by a multi-hinge member in which four one-touch release hinges are arranged and fixed in two rows inside and outside. The steel blast tower curing apparatus for air blasting according to claim 7, which is connected.   A steel tower curing method for air blasting, wherein the air blast steel tower curing apparatus according to any one of claims 1 to 12 is used to perform keren work on a steel tower.

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