JP5572357B2 - Mobile scaffolding equipment, mobile scaffolding installation method - Google Patents

Description

  The present invention relates to a moving scaffold installation device and a mobile scaffold installation method installed on a bridge girder such as a bridge.

  Bridge deterioration inspection or repair work, etc., is carried out by building a scaffold under the bridge. Conventionally, various scaffolds differing depending on applications are known (for example, see Patent Document 1). As an example that is often used as a method for installing a scaffold, there is a method for installing a moving scaffold by spanning a scaffold plate in the width direction below the bridge. This moving scaffold is performed, for example, by installing two scaffold plates in the lower width direction of the bridge and moving the scaffold plates in the longitudinal direction of the bridge.

JP 2008-63741 A

  However, such a moving operation of the scaffolding plate is performed at a high place and in a narrow area, so that the workability is extremely poor and is dangerous. In addition, the work of moving the scaffold board is quite troublesome and time-consuming.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a mobile scaffold installation device and a mobile scaffold installation method that have good workability and can safely move the scaffold.

In order to solve the above-mentioned problem, the moving scaffold installation device (30) according to claim 1 is a moving scaffold installation device that hangs a rope on a steel frame via a belt-like body. A base (31) to be gripped, an annular ring main body (32) removably attached to the tip of the base, and the rope (11) having one end attached to the ring main body along the longitudinal direction together with the base A band-shaped body (33) having an insertion portion (34a) that can be inserted into the base body, and after the band-shaped body is stretched over the steel frame and the ring body is removed from the base body, A U-shaped hook (36) for hooking the ring body is provided .

  According to this invention, when installing a mobile scaffold, even if it is a work in a high place and a narrow area, it can work safely.

In addition, the moving scaffold installation device according to claim 2 is the moving scaffold installation device according to claim 1, wherein the belt-like body further includes a protrusion protruding on a surface in contact with the steel frame material. And the protrusion is a magnetic body.

  According to the present invention, it is possible to easily carry out the work of passing the belt-like body over the steel frame in the process of installing the moving scaffold.

Moreover, the moving scaffold installation method of Claim 3 is a moving scaffold installation method which installs a moving scaffold under the steel frame (9a) provided beforehand in parallel with the bridge girder, Comprising: A predetermined rope (11) is passed through the belt-like body , and at that time, the end of the rope is connected by spanning the belt-like body and the rope using an instrument to at least one of the steel frames. on the rope through the movable annular member (12) to the second rope (17) with lifting capable mounted scaffolding plate (15) be those mounting the said instrument, the gripping by the user a is a substrate is an annular ring body detachably attached to the base body, the can be inserted insertion portion along said rope having one end attached to the ring body in the longitudinal direction together with the base body Comprising a Jo body, and to the substrate, after the ring body wherein the strip is passed over the steel material is removed from said substrate, U-shaped hooks for hooking the ring body is provided When the rope is hung on the steel frame, the base and the rope are inserted into the insertion portion of the belt-like body, and one end of the rope is attached to the ring body, and the rope should be hung The belt-like body is hooked on a steel frame, the base body is removed from the ring main body and pulled out from the insertion portion of the belt-like body, and a hook provided on the base body is hooked on the ring main body and pulled .

  According to this invention, when installing a mobile scaffold, even if it is a work in a high place and a narrow area, it can work safely.

Moreover, the moving scaffold installation method according to claim 4 is the moving scaffold installation method according to claim 3, wherein the belt-like body further includes a protrusion protruding on a surface in contact with the steel frame. Is a magnetic body, and when the strip is passed over the steel frame, the strip is disposed so that the projection is on the lower side, and the projection is disposed behind the strip. It is characterized by.

  According to the present invention, it is possible to easily carry out the work of passing the belt-like body over the steel frame in the process of installing the moving scaffold.

  According to the present invention, a moving scaffold can be installed easily and safely even in a high place and a narrow area. Moreover, the operation | work which spans a strip | belt-shaped body to a steel frame material in the process of installing a moving scaffold can be performed easily.

It is a front view which shows the installation state of a moving scaffold. It is AA sectional drawing of FIG. FIG. 3 (a) is a plan view and FIG. 3 (b) is a rear view showing an apparatus for installing a mobile scaffold. It is a figure which shows the attachment or detachment state of a ring main body and a base | substrate. It is a figure for demonstrating the mobile scaffold installation method using the instrument for mobile scaffold installation. It is a figure which shows the connection state of a main rope. It is a figure which shows the other connection state of a main rope. It is an enlarged view which shows the X part of FIG. It is a figure for demonstrating the dismantling method of a moving scaffold.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, as shown in FIG. 1, an example of constructing a moving scaffold 20 on a bridge 10 having a structure generally called a girder bridge in which a main girder 2 is provided on a bridge 4 via a support 5 will be described.

  In the present embodiment, the main girder 2 includes a bridge board 6 and a bridge girder 7. The bridge board 6 refers to a board that directly forms a road surface that directly supports vehicles, people, and the like. It is made up of horizontal beams 9 and supports the bridge plate 6. Further, the stringer 8 is made of, for example, I-shaped steel, and has a protruding portion 8a that protrudes inwardly as shown in FIG. Moreover, the cross beam 9 is comprised with the steel frame material 9a formed in the substantially L shape, for example. A plurality of the horizontal beams 9 are provided with a predetermined interval in the longitudinal direction of the bridge plate 6. Furthermore, the annular members 12, 62, 67 shown below are members generally called carabiners formed of stainless steel, copper, brass, aluminum, titanium, or the like.

  The moving scaffold 20 of this embodiment is installed in the bridge girder 7 that supports the bridge plate 6 of the bridge 10, and is installed below the cross girder 9 provided in the width direction of the bridge girder 7. Is done.

  As shown in FIG. 1, in the moving scaffold 20, two steel frames 9a, 9a provided in advance above the region where the scaffold 20a is to be provided are selected, and a strip 33 described later on both the steel frames 9a. A rope (hereinafter referred to as “main rope 11”) is stretched over the both ends of the main rope 11 so that both ends of the main rope 11 are connected to the lower main rope 11 via the annular member 12. The platform (hereinafter referred to as “scaffold plate 15”) is suspended by a rope (hereinafter referred to as “static rope 17”), and the scaffold 20a is installed. The scaffold plate 15 is provided so as to be stretched over the left and right vertical beams 8, and the end portions thereof are placed on the protruding portions 8 a of the vertical beams 8. For example, two scaffold plates 15 are provided adjacent to each other.

  The moving scaffold 20 installed in this way is moved by lifting (lifting) the scaffolding plate 15 using the static rope 17 while the inspector rides on the scaffolding plate 15 and investigates deterioration of the wall surface or the like. By doing so, it is possible to move the scaffold 20a. Thus, the inspector moves the scaffold 20a in this way to inspect the bridge 10 for deterioration.

  In the above work, first, it is necessary to carry out a work of hanging a rope around the steel frame material. In this embodiment, this work is performed using an instrument 30 shown below.

  As shown in FIG. 3, the instrument 30 has a predetermined length (about 1 to 4 m) provided with a U-shaped hook 36 formed by folding a metal plate-like body substantially in the center or forward. A base 31 formed in a substantially cylindrical shape, a metal (or plastic) ring ring body 32 provided with a connecting portion 32 a detachably attached to the base 31, the base 31 and the main rope 11. And a belt-like body 33 made of cloth provided with a belt 34 that can be inserted therethrough.

  The base 31 is formed of a light material so that it can be easily handled. As shown in FIG. 4, the tip 31a has a substantially semicircular cross section. On the other hand, the connecting portion 32 a provided in the ring body 32 is formed with a concave portion 32 b for fitting with the tip portion 31 a of the base 31. The cross-sectional shape of the concave portion 32b is formed in the same shape as the tip portion 31a of the base body 31, and can be fitted to the tip portion 31a of the base body 31, and the base body 31 can be freely inserted and removed from the concave portion 32b. .

  Note that the cross-sectional shape of the tip 31a of the base 31 in the present embodiment is formed in a substantially semicircular shape, but this is to prevent the ring body 32 from rotating, that is, in a substantially semicircular shape. The shape is not limited and may be a rectangular shape, a polygonal shape, or the like. Further, it may be circular without being processed.

  In addition, a fluorescent reflecting tape is stuck on the surface of the hook 36 provided on the base 31 in order to improve visibility from a distance. In place of the fluorescent reflection tape, a fluorescent paint may be applied to the surface.

  The band-shaped body 33 includes a substantially rectangular band main body 33a having a predetermined width and a belt 34 provided on the band main body 33a. The belt 34 is arranged in the width direction of the band main body 33a, and both ends thereof are provided by being sewn to the end of the band main body 33a, and at least the base 31 and the main rope 11 can be inserted in the intermediate part. It is formed with a hole 34a (an insertion portion of the present application). More specifically, the hole 34a is preferably formed so that about three fingers can be inserted.

  A plurality of belts 34 are provided in the longitudinal direction of the band body 33a with a predetermined interval. When the base body 31 and the main rope 11 are inserted through the belt 34, the base body 31 and the main rope 11 are connected to each other. It arrange | positions so that the longitudinal direction of one surface of the main body 33a may be followed.

  In addition, a substantially cylindrical protrusion 35 is provided at the center at one longitudinal end portion (backward in FIG. 3) of the band main body 33a. The protrusion 35 is preferably a magnetic material such as a magnet. As this magnetic body, for example, a magnet generally called a neodymium magnet is used, and the attraction force thereof has an attractive force several times that of a general magnet.

  Next, a method for constructing a moving scaffold using the above instrument will be described.

  First, as shown in FIG. 3, the base body 31 is inserted through the belt 34 of the belt-like body 33, the ring body 32 is attached to the front end portion of the base body 31 via the connecting portion 32 a, and the main rope 11 is further attached to the belt 31. And one end of the inserted main rope 11 is connected to the ring body 32 and attached. When the base 31 is inserted into the belt 34 of the belt-like body 33, the base 31 is inserted into the belt 34 such that the protrusion 35 is disposed rearward (on the hook 32 side).

  Next, two steel frames 9a and 9a for spanning the main rope 11 are selected, and as shown in FIG. 5 (a), the rear of the base 31 with respect to one of the steel frames 9a far from the user. And the band 33 is hooked on the upper part of the steel frame 9a so that the surface on which the projections 35 are provided is on the lower side.

  Next, when the base body 31 is pulled out from the connecting portion 32a of the ring main body 32 by the user, the ring main body 32 hangs down below the steel frame material 9a so as to hang from the strip-shaped body 33 as shown in FIG.

  Next, as shown in FIG. 5C, when the user hooks the hook 36 provided on the base 31 on the ring main body 32 and pulls it forward as shown by the arrow in FIG. As the ring main body 32 moves, the projection 35 moves until it is hooked on the end of the steel frame 9a (or is attracted to the steel frame 9a by magnetic force), and the base body 31 is further pulled toward the front, whereby the belt-like body 33 is moved to the steel frame 9a. The one end of the main rope 11 is drawn together with the ring main body 32 to the user side.

  Next, the other end of the main rope 11 is hooked on the other steel frame 9a with the strip 33 interposed therebetween, and one end of the main rope 11 is removed from the ring main body 32. For example, as shown in FIG. Both ends of the rope 11 are made into eight knots 41, and the respective slings 42 generated by the eight knots 41 are attached to the annular member 43. As another method for connecting the both ends of the main rope 11, as shown in FIG. 7, one end of the main rope 11 is an eight knot 41 and a sling 42 generated by the knot is attached to the annular member 43. In addition, a sling 45 generated by the knot is formed in the vicinity of the other end and a sling 45 generated by the knot is attached to the annular member 43, and the other end of the main rope 11 is further formed by the eight knot 41 and the sling 42 generated by the knot is circular. You may make it attach to the member 43. FIG. In the latter method, the tension knot of the main rope 11 can be adjusted because the plunging knot 44 is used.

  Next, a static rope 17 is prepared, and as shown in FIG. 2, a sling 45 is formed by a plunging knot 44 at a central portion of the static rope 17, and each sling 45, 45 is annular. While being connected to the lower main rope 11 via the member 12, both ends of the static rope 17 are attached to both ends of the scaffold plate 15 via the annular member 56.

  Further, a part of the static rope 17 between the portions formed as the pleasing knot 44 is formed into a clove hitch knot 58 on the annular member 57. A rope 59 functioning to raise the scaffold is attached to the annular member 57, and the rope 59 is hung on the pulley 61 of the annular member 62 with pulley attached to the main rope 11, as shown in FIGS. It is handed over and arranged so as to hang down. By pulling the end of the rope 59 that hangs down in this way, the scaffold plate 15 can be easily pulled up, and the scaffold plate 15 can be moved.

  Note that the static rope 17 may not be tied with various knots as in the present embodiment, but may be tied with simple knots to raise the scaffold plate 15. In this case, it is preferable to use a technique in which a rope 59 for pulling up the scaffolding plate 15 is hung on the pulley 61 and the scaffolding plate 15 is lifted with a small force as in this embodiment.

  In consideration of user safety, a rope 65 for securing workers may be further provided as shown in FIGS. 1 and 8. One end of the rope 65 is fixed to a bridge girder or the like, and is attached to a user's waist, for example, at an intermediate portion, and the other end is attached to an annular member 67 attached to the main rope 11.

  On the other hand, in the dismantling work of the mobile scaffold 20, the annular member 12 to which the static rope 17 to which the scaffold plate 15 is attached is removed from the main rope 11, the binding at both ends of the main rope 11 is released, and the main rope is released. 9, the ring body 32 is hooked on the belt 34 of the belt-like body 33 as shown in FIG. By pulling the body 33, the band-like body 33 can be easily collected and disassembled.

  As described above, the device for installing a moving scaffold according to the above-described embodiment can be attached to and detached from the base 31 including the base 31 provided with the U-shaped hook 36 formed by folding the plate-like body on the rear side. An annular ring main body 32 to be attached, a belt-like body 33 having a hole 34a through which the base body 31 and the main rope 11 can be disposed along the longitudinal direction, and through which the base body 31 and the main rope 11 can be inserted, It has.

  Moreover, the moving scaffold installation method of this embodiment is a method of installing a moving scaffold under the steel frame 9a previously provided in parallel with the bridge girder 7, and uses the tool 30 for the two steel frames 9a. Scaffolding plate attached to the main rope 11 so as to be lifted by a static rope 17 via an annular member 12 movable on the main rope 11 by connecting the end portions of the main rope 11 over the main rope 11 15 is attached.

  Further, in the spanning work to the main rope 11, the user grips the base 31, spans the band-shaped body 33 with the ring main body 32 as the tip, and removes the base 31 from the ring main body 32. The hook 36 is engaged with the ring body 32 from below and pulled. At this time, the end portion side of the belt-like body 33 provided with the protrusions 35 is set as the rear side and is hung over the steel frame 9a.

  Thereby, the operation | work which spans the main rope 11 to the steel frame material 9a becomes easy. Thereafter, a scaffold plate 15 suspended by a static rope 17 is attached to the main rope 11 via an annular member 12.

  Thus, according to the moving scaffold installation method of this invention, a moving scaffold can be installed easily by using the instrument 30. FIG. In addition, it is possible to install a mobile scaffold that can safely work even when working in high places and narrow areas.

  In addition, this application is not limited to this embodiment, It can implement in a various form. For example, the material of the constituent member of the instrument 30 is not limited to this embodiment, and a known member can be used as appropriate. Further, in this embodiment, the belt 34 is provided on one surface of the band body 33a so that the base 31 and the main rope 11 can be inserted, but the band body 33a is configured by overlapping two bands, The base 31 and the main rope 11 may be inserted through the inside in the longitudinal direction. In this case, since the base 31 and the main rope 11 may not be inserted well, for example, an annular member is interposed between the bands and the base 31 and the main rope 11 are passed through the annular member. May be. Further, when the band body 33a is formed to be longer, the main rope 11 is less likely to slip due to the frictional force of the band body 33a, and the work does not proceed smoothly. For example, a plastic member is provided in the longitudinal direction of the band body 33a. May be arranged, and the main rope 11 may be arranged thereon. Furthermore, the present invention is not limited to the bridge having the structure of the present embodiment, and can be used for a bridge having another structure. Furthermore, in this embodiment, the main rope and the static rope are configured to be tied with various knots, but it is not always necessary to tie them with the knot shown in the present embodiment. It doesn't matter.

9a Steel frame 11 Main rope 12 Annular member 15 Scaffold plate 17 Static rope 30 Instrument 31 Base body 32 Ring body 33 Strip body 34a Hole 36 Hook

Claims (4)

A tool for setting up a mobile scaffold that spans a rope through a strip on a steel frame,
A substrate gripped by a user ;
An annular ring body detachably attached to the tip of the base body;
A belt-like body having an insertion portion through which the rope, one end of which is attached to the ring body, can be inserted along the longitudinal direction together with the base ;
Equipped with a,
The base is provided with a U-shaped hook for hooking the ring main body after the belt-like body is stretched over the steel frame and the ring main body is detached from the base. Equipment for mobile scaffolding installation. The apparatus for installing a mobile scaffold according to claim 1, wherein the belt-like body further includes a protrusion protruding on a surface in contact with the steel frame , and the protrusion is a magnetic body. A moving scaffold installation method for installing a moving scaffold under a steel frame previously provided in parallel with a bridge girder, a predetermined rope is passed over the two steel frames via a band , and at least, One of the steel frames can be hung with a second rope via an annular member that can be moved over the rope by connecting the both ends of the rope by connecting the strip and the rope using a tool. To attach a scaffolding board to
The instrument is
A substrate gripped by a user ;
An annular ring body detachably attached to the base body;
A belt-like body having an insertion portion through which the rope, one end of which is attached to the ring body, can be inserted along the longitudinal direction together with the base ;
Bei to give a,
The base is provided with a U-shaped hook for hooking the ring main body after the belt-like body is stretched over the steel frame and the ring main body is detached from the base.
When spanning the rope through the strip to the steel frame,
While inserting the base body and the rope through the insertion portion of the belt-like body, attaching one end of the rope to the ring body,
Hang the belt on the steel frame,
The base is removed from the ring body and pulled out from the insertion part of the belt-like body,
A moving scaffold installation method characterized in that a hook provided on the base is hooked on the ring body and pulled . The belt-like body further includes a protrusion that protrudes on a surface that contacts the steel frame , and the protrusion is a magnetic body.
The belt-like body is arranged so that the protrusion is on the lower side when the belt-like body is passed over the steel frame, and the protrusion is arranged behind the belt-like body. 3. The moving scaffold installation method according to 3.

Images