JP6907443B2 - Protective film delivery device, long object delivery system, and long object delivery method - Google Patents

Description

The present invention relates to a technique for delivering a long object such as a bridge girder, and more specifically, since it is delivered by an endless rotary carrier without damaging the long object, a protective film for the endless rotary carrier. It relates to a device for sending out a long object, a long object sending system using this device, and a sending method using this system.

When constructing a bridge over an already in service facility, such as an overpass that straddles the top of a road or an overpass that straddles the top of a railroad track, send it out to install the bridge girder. The erection method is often adopted. This delivery erection method is a method in which the bridge girder is gradually sent out from one fulcrum side and the tip of the bridge girder reaches the other fulcrum side. Therefore, until the tip of the bridge girder reaches the other fulcrum side, this bridge girder is in a so-called cantilever state in which it is supported only on one end side.

Various methods have been adopted so far for sending out bridge girders in the sending erection method. For example, a method of sending out using a horizontal jack or an endless roller type sending device (hereinafter, simply referred to as "endless roller type sending device"). A method of sending out using.) Is known. The method of sending out using a horizontal jack uses a device equipped with two supports provided side by side in the sending direction and a jack for moving the supports so as to expand and contract between these supports. The bridge girder is moved by a jack while being alternately replaced by two supports, so to speak, it is a method of sending out by the inchworm method.

On the other hand, the method using the endless roller type delivery device is a method of sending out the bridge girder by rotating the endless rotary carrier on which the bridge girder is mounted. This endless roller type delivery device is also called a caterpillar (crawler) type delivery device, and is a device in which an endless rotary carrier, which is an endless belt, is hung around rollers (pulleys) at both ends. By rotating, the bridge girder placed on it is sent out. As proposed in Patent Document 1, this method has become the mainstream in recent years in the delivery erection method.

Japanese Unexamined Patent Publication No. 2001-172918

Many of the construction infrastructures that are currently shared (hereinafter referred to as "construction infrastructures") were intensively developed during the period of high economic growth, and since a considerable period of time has already passed, Japan's construction infrastructures. The whole is about to be renewed. However, renewing a large number of construction infrastructures at the same time or making large-scale reinforcements is difficult both in terms of budget and labor. Therefore, in recent years, it has been required to extend the life of the construction infrastructure by appropriately judging the soundness of the construction infrastructure and performing minor repairs from an early stage. Of course, the construction infrastructure that will be newly constructed is being designed and constructed while incorporating new technology so that it can be shared for a longer period of time.

For example, in the case of steel bridges, long life is achieved by working on new coating technologies, such as increasing the durability of the coating specifications on the surface of steel materials and adopting curved surface finishes for corners where the coating thickness is likely to be insufficient. It is producing a certain effect toward the conversion. On the other hand, when erection of the steel girder, it is difficult to completely avoid scratches and scratches, and the scratched portion naturally damages the coating film. When the delivery erection method is adopted, the lower surface (lower flange surface) is likely to be scratched when the steel girder is fed, and most of the lower flange surface comes into contact with the endless rotary carrier, especially in the method using the endless roller type delivery device. As a result, the coating film is damaged in a wide range. The damaged portion of the coating film becomes a weak point in anticorrosion and may cause local corrosion. Therefore, the current situation is that such a damaged portion of the coating film is touched up and repaired after being erected.

Originally, touch-up repair is carried out to hide scratches, so that in reality, only a thin topcoat paint is applied, and high durability cannot be maintained. In addition, the touch-up marks on the lower flange surface of the steel girder are relatively easy for people to see, so it is regarded as a problem that the landscape is spoiled.

When feeding a steel girder using an endless roller type delivery device, it is conceivable to attach a protective material to the steel girder (particularly the surface of the lower flange) in order to prevent damage to the lower flange surface of the steel girder. However, if a curing tape or the like is attached, there is a problem that the landscape is spoiled because a mark (glue residue) that is peeled off after the erection is generated.

An object of the present invention is to solve the problems of the prior art, that is, when a long object such as a bridge girder is sent out by using an endless roller type delivery device, the surface of the lower flange of the steel girder can be reliably and easily used. It is an object of the present invention to provide a protective film delivery device capable of preventing damage, a long object delivery system using this device, and a delivery method using this system.

The present invention has been made focusing on the point that a protective film roll is wound around an endless rotary carrier of an endless roller type delivery device, and a new protective film roll is sent out as the endless rotary carrier rotates. It is an invention made based on an idea that has never existed before.

The protective film delivery device of the present invention is a device that sends out a protective film that protects a long object placed on an endless rotary carrier, and includes a protective film roll and fixing means. The protective film delivery device of the present invention is arranged behind the endless rotary carrier in the direction of delivering a long object. This fixing means is a means for rotatably fixing the protective film roll around the axis. Then, by laying the protective film between the long object and the endless rotary carrier, the protective film roll rotates with the rotation of the endless rotary carrier, and the protective film is sent out.

The protective film sending device of the present invention may further include a protective film collecting means. The protective film collecting means is provided with a winding rotating body that can rotate around an axis, and is a means for winding the protective film sent out by the rotation of the endless rotating carrier around the winding rotating body. The protective film collecting means is arranged between the endless rotary carrier and the protective film roll. In this case, a part of the protective film roll (or fixing means) and a part of the protective film collecting means are connected by an endless rotating member, and the winding rotating body rotates with the rotation of the protective film roll. The protective film (so to speak, used protective film) sent out from the endless rotating body is wound around this winding rotating body.

The long object sending system of the present invention is a system (combination of devices) that sends out a long object placed on an endless rotary carrier while protecting it with a protective film. It is prepared. Of these, the rotary transfer device is a device that delivers a long object to be placed on the endless rotary carrier by rotating the endless rotary carrier, for example, an endless roller type delivery device. Then, the long object is sent out with the protective film laid between the endless rotary carrier and the long object. As a result, a long object can be sent out while being protected by a protective film.

The long object sending system of the present invention may also be provided with a protective film sending device including the above-mentioned protective film collecting means. In this case, the protective film (used protective film) sent out by the rotation of the endless rotary carrier can be wound around the winding rotating body.

The long object sending method of the present invention is a method of delivering a long object using the long object sending system of the present invention, and includes a long object placing step and a long object sending step. As in this in the long-length object mounting step, a long object arranged a protective film feed apparatus behind the rotary transport device in the direction of feeding the, elongated protective film roll of the protective fill beam is laid endless rotating transport member on Place things. On the other hand, in the long object delivery step, the endless rotary carrier is rotated to deliver the long object with a protective film laid between the endless rotary carrier and the long object.

The long object feeding method of the present invention can also be a method of delivering a long object using a long object sending system having a protective film collecting means. In this case, in the long object placing step, the protective film collecting means is arranged between the rotary transport device and the protective film roll, and in the long object sending step, the protective film collecting means is arranged as the protective film roll rotates. The winding rotating body rotates, whereby the protective film (used protective film) sent out by the rotation of the endless rotating carrier can be wound around the winding rotating body.

The protective film delivery device, the long object delivery system, and the long object delivery method of the present invention have the following effects.
(1) Even when using an endless roller type delivery device, scratches and scratches on the surface of the lower flange of the steel girder are unlikely to occur, the high durability of the coating can be maintained, and the landscape can be seen after operation. There is no loss.
(2) Since the surface of the lower flange of the steel girder is unlikely to be damaged, it is not necessary to carry out touch-up repair, and the material cost and labor cost can be reduced as compared with the conventional case.
(3) Since the protective film roll is sent out using the rotation of the endless rotary carrier, no special power is required, so there is no cost, and no wiring is required, so a good construction environment can be maintained. can.
(4) Further, since the protective film roll is sent out without human intervention, it is not necessary to secure a dedicated person for work and monitoring.
(5) If the protective film collecting means is provided, the used protective film does not scatter, and the time and effort to clean it up can be significantly reduced.

A side view showing a situation in which a steel girder is sent from a left pier toward a right pier by a delivery erection method. (A) is a side view showing a rotary transfer device, and (b) is a plan view of the rotary transfer device as viewed from above. A side view showing a long object delivery system including a stand-alone protective film delivery device and a rotary transfer device. (A) is a side view showing a stand-alone protective film delivery device, and (b) is a front view showing a stand-alone protective film delivery device. A side view showing a long object delivery system including a recovery type protective film delivery device and a rotary transfer device. (A) is a side view showing a recovery type protective film delivery device, and (b) is a front view showing a recovery type protective film delivery device. The flow chart which shows the flow of the main process of the long object feeding method of this invention.

An example of an embodiment of the protective film delivery device, the long object delivery system, and the long object delivery method of the present invention will be described with reference to the drawings. The present invention can be carried out when a long object having an axial dimension larger than the cross-sectional dimension is sent out, but here, for convenience, the case of a steel girder of a bridge will be described as an example of the elongated object.

1. 1. Overall Overview First, an outline of the present invention will be described with reference to FIG. FIG. 1 is a side view showing a situation in which the steel girder GS is fed from the left pier PE1 toward the right pier PE2 by the delivery erection method. Normally, when the steel girder GS is sent out, the hand-rolling machine MP is attached to the tip of the steel girder GS (on the right side in the figure) as shown in this figure. In addition, since the steel girder GS generally has a large (long) axial dimension, support SH is installed on both the sending side (left pier PE1 side) and the receiving side (right pier PE2 side) as shown in the figure. ..

In the conventional delivery erection method, for example, an endless roller type delivery device is arranged above the left pier PE1 on the delivery side, and the steel girder GS is sent out by rotating the endless rotary carrier of this endless roller type delivery device. .. On the other hand, as shown in FIG. 1, in the present invention, instead of the endless roller type delivery device, the long object delivery system 100 is arranged on the delivery side (upper part of the left pier PE1 in the figure). The long object delivery system 100 includes a protective film delivery device 300, which will be described later, in addition to a delivery device (hereinafter, referred to as “rotary transfer device 200”) in which an endless rotary carrier rotates, such as an endless roller type delivery device. It is a system (combination of devices) provided, and can feed out the steel girder GS while protecting the lower flange surface of the steel girder GS in contact with the endless carrier of the rotary transfer device 200 with a protective film. The long object sending system 100 may be arranged not only on the sending side but also on the receiving side (for example, the upper part of the right pier PE2) or on the support SH.

2. Long object delivery system Next, the long object delivery system 100 of the present invention will be described in detail. Since the long object sending system 100 uses the protective film sending device 300 of the present invention, the protective film sending device 300 will also be described in the explanation of the long object sending system 100. And. Further, the method of delivering a long object according to the present invention is a method performed by using the long object sending system 100. Therefore, the long object delivery system 100 will be described first, and then the long object delivery method of the present invention will be described.

(Rotary transfer device)
2A and 2B are views showing a rotary transfer device 200 exemplifying an endless roller type delivery device, where FIG. 2A is a side view and FIG. 2B is a plan view seen from above. The rotary transfer device 200 includes the endless rotary transfer body 210 shown in this figure, and also includes a rotation mechanism (not shown) that is operated by power. The rotary transfer mechanism rotates the endless rotary carrier 210 to carry out the endless rotary transfer. The steel girder GS on the body 210 is sent out. It should be noted that the rotary transfer device 200 is provided with power, and the rotary mechanism can be operated by the power, or the rotary transfer device 200 is not provided with power and the rotary mechanism is operated by using the power of other equipment. You can also do it.

As shown in FIG. 2B, the surface of the endless rotary carrier 210 may be roughened by providing irregularities in order to increase the frictional force with the steel girder GS (that is, to secure a large friction coefficient). For example, a crawler (caterpillar) can be used as the endless rotary carrier 210. Since the endless rotary transfer body 210 rotates, the main body of the endless rotary carrier 210 is installed after a space is provided between the endless rotary carrier 210 located on the lower side and the ground plane.

(Protective film delivery device)
The long object delivery system 100 can appropriately select and use two types of protective film delivery devices 300. The first type is a protective film delivery device 300 (hereinafter, "stand-alone protective film delivery") that does not collect the protective film (hereinafter, referred to as "used protective film" for convenience) after being sent out by the rotation of the endless rotary carrier 210. The second type is a protective film sending device 300 (hereinafter, referred to as “recoverable protective film sending device 300b”) that collects the used protective film. Hereinafter, the stand-alone protective film delivery device 300a and the recovery type protective film delivery device 300b will be described in order.

FIG. 3 is a side view showing a long object delivery system 100 including a stand-alone protective film delivery device 300a and a rotary transfer device 200. The long object delivery system 100 shown in this figure includes a stand-alone protective film delivery device 300a and a rotary transfer device 200, and is rotationally conveyed in the delivery direction of the steel girder GS (white arrows shown in the figure). The stand-alone protective film delivery device 300a is arranged behind the device 200 (on the left side in the figure). Then, the protective film 312 sent out from the stand-alone protective film delivery device 300a passes between the steel girder GS and the endless rotary carrier 210, and is further forward (clockwise in the figure) by the rotation of the endless rotary carrier 210. Move to the left side in the figure). By laying a protective film between the steel girder GS and the endless rotary carrier 210 in this way, direct contact between the steel girder GS and the endless rotary carrier 210 is avoided, that is, the endless rotary carrier 210 (particularly the surface). ) And the steel girder GS (particularly the surface of the lower flange) can be protected.

4A and 4B are detailed views for explaining the stand-alone protective film delivery device 300a, in which FIG. 4A is a side view thereof and FIG. 4B is a front view thereof. As shown in FIG. 4A, the stand-alone protective film delivery device 300a includes a protective film roll 310 and a fixing means 320. Of these, the protective film roll 310 is a roll core 311 in which the protective film 312 is wound in multiple layers. As the protective film 312, various conventionally used materials such as a polyethylene sheet can be adopted as long as it is a thin sheet and has considerable strength. For example, a commercially available packaging film can be used. Etc. can be used.

One fixing means 320 includes a first rotating shaft body 321 and a first bearing column 322, and a support plate 323. More specifically, as shown in FIG. 4B, two first bearing columns 322 are erected on the support plate 323, and the first rotating shaft body 321 is installed between these two first bearing columns 322. As a result, the fixing means 320 is formed. Both ends of the first rotating shaft body 321 are supported by two first bearing columns 322 so as to have a structure that can rotate around the rotating shaft.

The protective film roll 310 is fixed to the fixing means 320 by inserting the first rotating shaft body 321 into the hollow roll core 311 so that the protective film roll 310 also rotates around the rotating shaft together with the first rotating shaft body 321. It is possible. The first rotating shaft body 321 is, for example, inserted both ends of the first rotating shaft body 321 into a small hole provided in the first bearing column 322, or the first rotating shaft body 321 is inserted in a small groove provided in the first bearing column 322. It is preferable to attach it to the first bearing column 322 so that both ends of the 321 can be easily attached and detached. With such a structure, the protective film roll 310 can be easily replaced. The first rotating shaft body 321 shown in FIG. 4B has two parts, a large diameter portion (center portion) matching the inner diameter of the roll core 311 and a small diameter portion (both ends) supported by the first bearing column 322. Although the structure has a heavy diameter structure, the structure is not limited to this, and the first rotating shaft body 321 having a diameter that matches the inner diameter of the roll core 311 including both ends supported by the first bearing column 322 can also be used.

FIG. 5 is a side view showing a long object delivery system 100 including a recovery type protective film delivery device 300b and a rotary transfer device 200. The long object delivery system 100 shown in this figure includes a recovery type protective film delivery device 300b and a rotary transfer device 200, and is rotationally conveyed in the delivery direction of the steel girder GS (white arrow shown in the figure). The recovery type protective film delivery device 300b is arranged behind the device 200 (on the left side in the figure). Then, the protective film 312 sent out from the recovery type protective film delivery device 300b passes between the steel girder GS and the endless rotary carrier 210, and is further forward (clockwise in the figure) by the rotation of the endless rotary carrier 210. It moves to the left side in the figure, is folded back at the tip (left end in the figure) of the endless rotary carrier 210, and then is wound up by the protective film collecting means 330 provided in the recovery type protective film sending device 300b. By laying a protective film between the steel girder GS and the endless rotary carrier 210 in this way, direct contact between the steel girder GS and the endless rotary carrier 210 is avoided, that is, the endless rotary carrier 210 (particularly the surface). ) And the steel girder GS (particularly the surface of the lower flange), and by collecting the used protective film by the protective film collecting means 330, the used protective film is not scattered or scattered. It can be easily cleaned up.

6A and 6B are detailed views for explaining the recovery type protective film delivery device 300b, in which FIG. 6A is a side view thereof and FIG. 6B is a front view thereof. As shown in FIG. 6A, the recovery type protective film delivery device 300b includes a protective film roll 310, a fixing means 320, a protective film recovery means 330, and an endless rotating member 340. Of these, the protective film roll 310 and the fixing means 320 are the same as those described in the stand-alone protective film delivery device 300a, and thus the description thereof will be omitted here.

The protective film collecting means 330 includes a second rotating shaft body 331 and a second bearing column 332. More specifically, as shown in FIG. 6 (b), similarly to the first bearing column 322, the second bearing column 332 is erected on the support plate 323, and the second rotating shaft is provided between these two second bearing columns 332. By installing the body 331, the protective film collecting means 330 is formed. Both ends of the second rotating shaft body 331 are supported by two second bearing columns 332 so as to have a structure that can rotate around the rotating shaft.

The recovery type protective film delivery device 300b will be described in more detail with reference to FIG. 6A. Two first bearing columns 322 are erected at the rear end (left end in the figure) of the support plate 323 constituting the recovery type protective film delivery device 300b in the delivery direction of the steel girder GS, and these two first bearing columns 322 are erected. The first rotating shaft body 321 is rotatably attached between the bearing columns 322, and the protective film roll 310 is attached to the first rotating shaft body 321 by inserting the hollow roll core 311. Although it has been explained that the fixing means 320 shown in FIG. 6 is the same as that described in the stand-alone protective film feeding device 300a, the fixing means 320 of the stand-alone protective film feeding device 300 is the first bearing column 322. The standing position of is different. That is, the fixing means 320 of the stand-alone protective film delivery device 300 has the first bearing column 322 erected at the center of the support plate 323, whereas the fixing means 320 of the recovery type protective film delivery device 300b has the support plate. The first bearing column 322 is erected at the end of 323.

Two second bearing columns 332 are erected at the front end (right end in the figure) of the support plate 323, and the second rotating shaft body 331 is rotatably attached between the two second bearing columns 332. Then, the endless rotating member 340 is hung around the first rotating shaft body 321 of the fixing means 320, and the endless rotating member 340 is also hung around the second rotating shaft body 331 of the protective film collecting means 330. By connecting the first rotating shaft body 321 and the second rotating shaft body 331 by the endless rotating member 340 in this way, the second rotating shaft body 331 also rotates with the rotation of the first rotating shaft body 3210. ..

The endless rotating member 340 has a rope-like or belt-like shape and exhibits an endless ring shape, and it is more preferable to form the endless rotating member 340 with a material having considerable elasticity, for example, made of rubber. The recovery type protective film delivery device 300b may be provided with the endless rotating member 340 only on one side of the protective film roll 310 (for example, the front side of the paper surface in FIG. 6A), or both sides of the protective film roll 310 (FIG. 6). An endless rotating member 340 may be provided on the front side of the paper surface and the back side of the paper surface in (a). Further, in FIG. 6A, the endless rotating member 340 is hung around the first rotating shaft body 321 and the second rotating shaft body 331, but the present invention is not limited to this, and the roll core 311 and the second rotation of the protective film roll 310 are not limited to this. By hanging the endless rotating member 340 around the shaft body 331, the first rotating shaft body 321 and the second rotating shaft body 331 can be indirectly connected.

(Example of using a long object delivery system)
An example of using the long object sending system 100 when feeding the steel girder GS will be described with reference to FIG. It is assumed that the long object sending system 100 described here is provided with the recovery type protective film sending device 300b.

The rotary transfer device 200 is arranged at a predetermined position, and the recovery type protective film delivery device 300b is arranged on the rear side (left side in the figure) of the steel girder GS in the delivery direction (white arrow shown in the figure). At this time, the recovery type protective film delivery device 300b is arranged so that the protective film collecting means 330 is in front of the protective film roll 310 (on the right side in the figure). When the rotary transfer device 200 and the recovery type protective film delivery device 300b are arranged, the protective film 312 is pulled out from the protective film roll 310, and the protective film 312 is wound around the outer periphery of the endless rotary transfer body 210. At that time, the protective film 312 may be wound while rotating the endless rotary carrier 210.

The protective film 312 folded back at the front end (right side in the figure) of the endless rotary transport body 210 is further stretched to the protective film collecting means 330 located behind the rotary transport device 200 (left side in the figure). Then, the tip of the protective film 312 is fixed to the second rotating shaft body 331 of the protective film collecting means 330 by using a tape, an adhesive or the like. At this point, the steel girder GS is ready to be sent out.

Subsequently, the steel girder GS is placed on the surface of the endless rotary carrier 210 located on the upper side. At this time, the surface (outer circumference) of the endless rotary carrier 210 is covered with the protective film 312, that is, the protective film 312 is interposed between the steel girder GS and the endless rotary carrier 210, so that the steel girder GS The surface of the lower flange does not come into direct contact with the endless rotary carrier 210. In this state, the endless rotary transfer body 210 is rotated (clockwise in the figure) by the rotation mechanism of the rotary transfer device 200, and the steel girder GS placed on the endless rotary carrier 210 is gradually moved forward (white in the figure). Send out to (arrow). When the endless rotary carrier 210 rotates, the protective film 312 is pulled out from the protective film roll 310, and the protective film roll 310 also rotates (clockwise in the figure). In other words, the protective film 312 is pulled out from the protective film roll 310 with the movement of the steel girder GS with the rotation of the endless rotary carrier 210, so that between the steel girder GS and the endless rotary carrier 210 A new protective film 312 will always be laid.

Since the first rotating shaft body 321 (or the protective film roll 310) and the second rotating shaft body 331 are connected by the endless rotating member 340, when the protective film roll 310 rotates according to the rotation of the endless rotating carrier 210. After all, the second rotating shaft body 331 also rotates (clockwise in the figure). Since the tip of the protective film 312 is fixed to the second rotating shaft 331 by a tape or the like, the used protective film and the second rotary shaft 331 is rotated will be sequentially wound on the second rotating shaft 331 .. By winding the second rotating shaft body 331 in this way, the used protective film can be collected, the used protective film does not scatter or scatter, and the used protective film can be easily cleaned up.

3. 3. Long Object Delivery Method Next, the long object delivery method of the present invention will be described with reference to FIG. 7. FIG. 7 is a flow chart showing a flow of a main process of the long object feeding method of the present invention. The method of delivering a long object according to the present invention is a method performed by using the long object sending system 100 described so far. Therefore, avoiding explanations that overlap with the contents described in the long object sending system 100, the present invention of the present invention. Only the contents peculiar to the method of sending out long objects will be explained. That is, the contents not described here are the same as those described in the long object sending system 100 including the explanation of the protective film sending device 300.

First, the rotary transfer device 200 is arranged at a predetermined position, and the protective film delivery device 300 is arranged on the rear side of the steel girder GS in the delivery direction (Step 10). When the recovery type protective film delivery device 300b is adopted, the protective film recovery means 330 is arranged so as to be in front of the protective film roll 310. When the rotary transport device 200 and the protective film delivery device 300 are arranged respectively, the protective film 312 is pulled out from the protective film roll 310, and the protective film 312 is wound around the outer periphery of the endless rotary transport body 210 (Step 20). At that time, the protective film 312 may be wound while rotating the endless rotary carrier 210.

When the recovery type protective film delivery device 300b is adopted, the protective film 312 folded back at the front end of the endless rotary transport body 210 is further stretched to the protective film recovery means 330 located behind the rotary transport device 200, and taped or adhered. The tip of the protective film 312 is fixed to the second rotating shaft body 331 of the protective film collecting means 330 using an agent or the like (Step 30). With the steps up to this point, the steel girder GS is ready to be sent out.

Subsequently, the steel girder GS is placed on the surface of the endless rotary carrier 210 located on the upper side (Step 40). Then, the rotation of the rotary transport device 200 is carried out in a state where the surface (outer circumference) of the endless rotary transport body 210 is covered with the protective film 312, that is, in a state where the protective film 312 is interposed between the steel girder GS and the endless rotary transport body 210. The endless rotary transfer body 210 is rotated by a mechanism, and the steel girder GS placed on the endless rotary carrier 210 is gradually sent forward (Step 50). When the endless rotary carrier 210 rotates, the protective film 312 is pulled out from the protective film roll 310, and the protective film roll 310 also rotates accordingly. Since the protective film 312 is pulled out from the protective film roll 310 as the steel girder GS moves in this way, a new protective film 312 is always laid between the steel girder GS and the endless rotary carrier 210. When the protective film 312 of the protective film roll 310 runs out during feeding, such as when the steel girder GS is particularly long, the first rotating shaft body 321 is removed from the first bearing column 322, and a new protective film roll 310 is installed. After attaching the mounted first rotating shaft body 321 to the first bearing column 322, it is preferable to continue feeding the steel girder GS.

When the recovery type protective film delivery device 300b is adopted, since the first rotating shaft body 321 (or the protective film roll 310) and the second rotating shaft body 331 are connected by the endless rotating member 340, the end rotating shaft body 210 When the protective film roll 310 rotates according to the rotation of the second rotating shaft body 331, the second rotating shaft body 331 also rotates. Recovery protection for the leading end of the film 312 is fixed to the second rotating shaft 331 by a tape or the like, the used protective film and the second rotary shaft 331 is rotated is sequentially wound on the second rotating shaft 331 Will be done.

When the steel girder GS can be sent out to a predetermined position, it is cleaned up (Step 60). When the stand-alone protective film delivery device 300a is adopted, the operator manually collects the used protective film, and when the recovery type protective film delivery device 300b is adopted, the protective film 312 is cut at an arbitrary position. Then, the second rotating shaft body 331 around which the used protective film is wound is removed from the second bearing column 332, and the used protective film is collected.

The protective film delivery device, the long object delivery system, and the long object delivery method of the present invention can be used not only for the delivery erection method but also for vent erection and pontoon transportation. According to the invention of the present application, it is possible to maintain high durability of coating on a steel bridge, and as a result, it is possible to extend the life of a bridge, which is a social infrastructure. Can be said to be an invention that can be expected to make a great contribution.

100 Long object delivery system 200 (for long object delivery system) Rotary transfer device 210 (for rotary transfer device) Endless rotary carrier 300 (for long object delivery system) Protective film delivery device 300a (for long object delivery system) ) Stand-alone protective film delivery device 300b (for long object delivery system) Recovery type protective film delivery device 310 (for protective film delivery device) Protective film roll 311 (for protective film roll) Roll core 312 (for protective film roll) protection Film 320 (of the protective film delivery device) Fixing means 321 (of the fixing means) 1st rotating shaft 322 (of the fixing means) 1st bearing column 323 (of the fixing means) Support plate 330 (of the recovery type protective film sending device) Protective film recovery means 331 (Protective film recovery means) Second rotating shaft 332 (Protective film recovery means) Second bearing column 340 (Recoverable protective film delivery device) Endless rotating member GS Steel girder PE1 Left bridge pedestal PE2 Right side Bridge pedestal MP hand-rolling machine SH support

Claims (6)

A device that sends out a protective film that protects a long object placed on an endless rotary carrier and is arranged behind the endless rotary carrier in the direction in which the long object is sent out .
Protective film roll and
A fixing means for rotatably fixing the protective film roll around an axis is provided.
By laying the protective film of the protective film roll between the long object and the endless rotary carrier, the protective film roll rotates with the rotation of the endless rotary carrier, and the protective film is formed. Sent out,
A protective film delivery device characterized by this. A winding rotating body that can rotate around an axis is provided, and a protective film collecting means that winds the protective film sent out by the rotation of the endless rotating carrier on the winding rotating body is further provided.
The protective film collecting means is arranged between the endless rotary carrier and the protective film roll.
A part of the protective film roll or the fixing means and a part of the protective film collecting means are connected by an endless rotating member, and the winding rotating body rotates with the rotation of the protective film roll.
The protective film sending device according to claim 1. In a system that sends out a long object placed on an endless rotary carrier while protecting it with a protective film.
A rotary transfer device that delivers the long object to be placed on the endless rotary carrier by rotating the endless rotary carrier.
A protective film delivery device including a protective film roll and a fixing means for rotatably fixing the protective film roll around an axis.
The protective film delivery device is arranged behind the rotary transfer device in the direction of delivering the long object.
By laying the protective film of the protective film roll between the long object and the endless rotary carrier, the protective film roll rotates with the rotation of the endless rotary carrier, and the protective film Is sent out,
With the protective film laid between the endless rotary carrier and the long object, the long object is sent out.
A long object delivery system characterized by this. The protective film delivery device further includes a protective film collecting means for winding the protective film delivered by the rotation of the endless rotary carrier and winding the protective film around the rotating body.
The protective film collecting means is arranged between the rotary transfer device and the protective film roll.
The take-up rotating body can rotate about an axis and
A part of the protective film roll or the fixing means and a part of the protective film collecting means are connected by an endless rotating member, and the winding rotating body rotates with the rotation of the protective film roll.
3. The long object sending system according to claim 3. In the method of sending out a long object using a long object sending system,
The long object delivery system is a rotary transfer device that delivers the long object to be placed on the endless rotary carrier by rotating the endless rotary carrier, and a protective film roll and the protective film roll are rotated about an axis. It has a protective film delivery device, which is provided with a fixing means for fixing, and has.
With arranging the protective film feed apparatus behind the said rotary transport device in the direction for feeding said long product, said long product placement in the protective film roll of the protective fill beam is laid the endless rotary conveying member on The process of placing long objects to be placed and
A long object delivery step of delivering the long object with the protective film laid between the endless rotary carrier and the long object by rotating the endless rotary carrier is provided.
Wherein said protective film roll is rotated with the rotation of the endless rotary conveying member, wherein the protective film is fed from the previous SL protective film feed device,
A method of sending out long objects, which is characterized by this. The protective film delivery device further includes a protective film collecting means for winding the protective film delivered by the rotation of the endless rotary carrier and winding the protective film around the rotating body.
In the long object placing step, the protective film collecting means is arranged between the rotary transfer device and the protective film roll.
The take-up rotating body can rotate about an axis and
A part of the protective film roll or the fixing means and a part of the protective film collecting means are connected by an endless rotating member.
In the long object delivery step, the take-up rotating body rotates with the rotation of the protective film roll, so that the protective film to be sent out is wound around the take-up rotating body.
The method for sending out a long object according to claim 5.

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