Covering material spreading device

Abstract

To provide a coating material spreading device 10 in which a coating material 30 is hardly wound up by wind even during spreading work.SOLUTION: A coating material spreading device 10 spreads a coating material 30 on a slope face A. The coating material spreading device 10 includes a driving mechanism, a tension means for transmitting the driving force of the driving mechanism to the coating material 30, and a drag means for generating tensile stress in the coating material 30 moved in the spreading direction E by the tension means.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coating material spreading device for spreading a coating material on a slope. [Background technology]

[0002] BACKGROUND ART Conventionally, construction work has been carried out to cover slopes such as river embankments and road edges with synthetic resin covering materials such as blue tarps as covering materials for protecting the slopes.

[0003] Since such slope construction work involves work on an inclined surface, it is not easy to carry and spread the covering material. For this reason, a technique is known in which the covering material is pulled up onto the slope by a rope from a movable cart carrying the wound covering material and spread it out (Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 59-112846 [Patent Document 2] Japanese Patent Application Publication No. 9-59991 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if a strong wind blows while the covering material is being deployed, the covering material may be blown up by the wind, and the deployment work may have to be interrupted or stopped.

[0006] Therefore, the present invention provides a covering material extension device that is less likely to cause the covering material to be blown up by the wind even during extension work. [Means for solving the problem]

[0007] The present invention has been made to solve at least some of the above-mentioned problems, and can be realized as the following aspects or application examples.

[0008] [1] One aspect of the dressing deployment device according to the present invention is A coating material spreading device that spreads a coating material on a slope, A drive mechanism; a tensioning means for transmitting the driving force of the driving mechanism to the covering material; a resistance means for generating a tensile stress on the covering material that is moved in the extension direction by the tension means; The present invention is characterized by comprising:

[0009] [2] In one embodiment of the coating material deployment device, By generating said tensile stress by said resistance means, the tensile force acting on said tension means can be increased by at least 10N.

[0010] [3] In one embodiment of the coating material deployment device, In the coating material deployment device according to claim 1 or 2, The tension means and the resistance means can apply a tension to the covering material such that the covering material does not get rolled up in wind with a wind speed of 10 m / s or less.

[0011] [4] In one embodiment of the coating material deployment device, The covering material may have a width of 1.8 m to 3.6 m in a direction perpendicular to the extension direction. [Effects of the Invention]

[0012] According to the covering material spreading device of the present invention, even if the wind blows during the spreading work of the covering material, the covering material is unlikely to be blown up by the wind, so the spreading work can be continued and work efficiency is excellent. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view schematically illustrating a deployment operation by a dressing deployment device according to the present embodiment. [Figure 2] 1 is a schematic diagram showing a simplified configuration of a dressing deployment device according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Preferred embodiments of the present invention will be described in detail below with reference to the drawings. Note that the embodiments described below do not unduly limit the content of the present invention as defined in the claims. Furthermore, not all of the configurations described below are necessarily essential components of the present invention.

[0015] The covering material deployment device according to this embodiment will be described in detail using Figures 1 and 2. Figure 1 is a perspective view that shows the deployment work by the covering material deployment device according to this embodiment, and Figure 2 is a schematic diagram that shows a simplified configuration of the covering material deployment device according to this embodiment. In Figure 2, slope A is not shown.

[0016] As shown in Figures 1 and 2, the covering material spreading device 10 is a device that spreads covering material 30 onto a slope A. The covering material spreading device 10 includes a drive mechanism, a tensioning means that transmits the driving force of the drive mechanism to the covering material 30, and a resistance means that generates tensile stress in the covering material 30 that moves in a spreading direction E by the tensioning means. In Figures 1 and 2, the spreading direction E is the direction of the arrow that follows the inclination of the slope A. The covering material spreading device 10 can include a machine base 16 that includes a feed unit 14 that rotatably supports the covering material 30 in a rolled state (hereinafter referred to as "rolled covering material 32").

[0017] The covering material 30 covers the slope A to protect it. The covering material 30 is longer than the construction length on the slope A; for example, in FIG. 1 , it is longer than the length of the slope A in the vertical direction (extension direction E). The covering material 30 is transported to the construction site, for example, wound around a core 36 (wound covering material 32). The wound covering material 32 is rotatably supported by the feed-out section 14. The wound covering material 32 is wound around the core 36, for example. The tip 34 of the covering material 30 pulled out from the wound covering material 32 is fixed to, for example, a fixed rod 40. The tip 34 can be fixed to the fixed rod 40 using a known sheet fixing means. The sheet fixing means may be, for example, a plurality of clips that clamp the covering material 30 between the fixed rod 40 and the tip 34 wrapped around the fixed rod 40.

[0018] The covering material 30 may be in the form of a sheet or net, and is preferably flexible and deformable in consideration of ease of installation. There are no limitations on the material of the covering material 30, but natural materials, synthetic resins, metals, etc. can be used. Examples of natural materials that can be used include natural fibers such as cotton, linen, and silk. Examples of synthetic resins that can be used include polypropylene (PP), polyethylene (PE), polyesters (PEs), and polyvinyl chloride (PVC). Examples of metals that can be used include iron, stainless steel, aluminum, and copper. The covering material 30 may also be a composite made by combining different materials. For example, it is preferable to use a material with excellent weather resistance to protect the slope A for a long period of time, and for example, the surface of the covering material 30 may be coated with a material with excellent weather resistance. If the covering material 30 is in the form of an impermeable sheet, for example, a so-called blue tarp made mainly of polyethylene, it is relatively inexpensive and can be used. It is highly versatile and can protect the slope A from rainwater. If the covering material 30 is in the form of a water-permeable sheet, such as a long-fiber nonwoven fabric, it can be used for slopes A that require drainage as well as reinforcement of the slope A. If the covering material 30 is in the form of a net, it can be used, for example, for treating the surface of soft ground or as a rockfall prevention net.

[0019] Slope A is an inclined surface, and includes, for example, artificial slopes created by embankment or cutting in road or housing development, natural slopes such as mountains, and the sides of river levees and revetments. Slope A is covered and protected by covering material 30 to prevent rainwater from seeping in and damage to slope A. The upper and lower parts of slope A preferably have flat, gently sloping surfaces that make it easy for workers to work, and it is particularly preferable for the part where the covering material extension device 10 is installed to have a flat surface. It is preferable that the covering material extension device 10 be able to move across the upper or lower part of slope A in the lateral direction of slope A. The upper and lower parts of slope A are ground, but structures such as gutters partially buried in the ground may also be present.

[0020] In the covering material spreading device 10, for example, the machine base 16 is placed at the bottom of the slope A on which the covering material 30 is to be applied, and the fixed base 60 is placed at the top of the slope A. The covering material 30 is spread along the slope A from the machine base 16 side, which is equipped with the delivery section 14, to the fixed base 60 side. Note that the direction in which the covering material 30 is spread is not limited to this, and by changing the positions of the machine base 16 and the fixed base 60, the covering material 30 may be spread from the top to the bottom of the slope A, or it may be spread in the horizontal direction of the slope A.

[0021] The machine base 16 includes a feed-out section 14 that rotatably supports the wound covering material 32. The machine base 16 is a frame made of, for example, metal that extends along the longitudinal width of the wound covering material 32. The machine base 16 preferably includes a plurality of wheels on its lower portion for movement. The machine base 16 includes, for example, a first hoist 11 and a second hoist 12 as a drive mechanism. In this embodiment, the drive mechanism is provided on the machine base 16, but part or all of the drive mechanism may be provided on the fixed base 60.

[0022] The feed unit 14 is provided on the machine base 16. The feed unit 14 rotatably supports, for example, both ends of a winding core 36 of the wound covering material 32. The winding core 36 is, for example, a cylindrical rod made of metal and longer than the wound covering material 32. The feed unit 14 may include multiple free rolls, such as those described in Patent Document 1, on which the wound covering material 32 is rotatably mounted. The feed unit 14 gradually unwinds the wound covering material 32 while rotating the wound covering material 32 around its axis as the leading end 34 of the covering material 30 moves. The feed unit 14 may also include a drive unit for actively unwinding the wound covering material 32. If the feed unit 14 includes a drive unit, the drive unit may act as a resistance means by limiting the unwinding speed of the covering material 30.

[0023] The drive mechanism is a mechanism that generates a drive force for extending the covering material 30 in the extension direction E. The drive mechanism includes a set of first winches 11 that pull the rope 20b, which is the pulling means of this embodiment, and a set of second winches 12 that pay out the rope 20a. The number of winches is not limited to this, and may be one or any other combination as long as it is able to generate the required drive force. The drive mechanism is preferably electrically driven, but is not limited to being electrically driven as long as it is able to pull the pulling means along the slope A, and may use another power source or may be manual.

[0024] The hoist is fixed, for example, on a machine base 16. The first hoist 11 can move the fixed rod 40 fixed to one end of the rope 20b and the tip 34 of the covering material 30 fixed to the fixed rod 40 along the deployment direction E by winding up the two ropes 20b. The second hoist 12 can move the fixed rod 40 and the tip 34 to the top of the slope A by letting out the two ropes 20a in accordance with the winding speed of the first hoist 11. When the covering material 30 is blown by a strong wind, slack occurs in the ropes 20a and 20b, and so the fixed rod 40 does not move too far away from the slope A. It is preferable to set the winding up of the second hoist 12 to be slightly delayed from the winding up of the first hoist 11. This prevents the covering material 30 from being blown up by a strong wind and creating waves. This reduces the chance of the covering material 30 coming off the fixed rod 40.

[0025] The tensioning means is a means for pulling the tip 34 of the covering material 30 along the slope A. The tensioning means can connect the drive mechanism to the tip 34. The tensioning means can transmit the driving force of the drive mechanism to the tip 34. In addition to the ropes 20a and 20b used in this embodiment, known means such as string-like members such as wires and chains can be used as the tensioning means depending on the type of drive mechanism. For convenience of explanation, the rope 20a wound up by the first hoist 11 and the rope 20b let out from the second hoist 12 are given two reference numerals, but they may also be a single continuous string-like member. The ropes 20a and 20b are connected to a fixed rod 40 to form a single continuous rope. The ropes 20a and 20b are fixed to both ends of the fixed rod 40, for example. In this case, the distance between adjacent ropes 20a and 20b is equal to the length of the fixed rod 40. The length of the fixed rod 40 may be set to be equal to or less than the width of the covering material 30, for example. By making the fixing rod 40 shorter than the width of the covering material 30, the side ends of adjacent covering materials 30 can be installed so as to overlap each other.

[0026] The fixed base 60 is installed in a position opposite the machine base 16 across the slope A, which is the target of construction. In the example of Figure 1, the fixed base 60 is installed at the top of the slope A, but if the machine base 16 is located at the top of the slope A, the fixed base 60 will be installed at the bottom of the slope A. When the covering material 30 is to be spread in the horizontal direction of the slope A, the machine base 16 and the fixed base 60 are positioned so that they extend in the vertical direction of the slope A.

[0027] The fixed base 60 includes two pulleys 62. The two pulleys 62 are fixed to both longitudinal ends of the fixed base 60, which is erected, for example, at the top of the slope A. The distance between the two pulleys 62 is the distance between the ropes 20a and 20b. The fixed base 60 is preferably securely fixed to the top of the slope A, etc., to prevent it from tipping or moving toward the slope A due to the winding force of the rope 20b and the pulling force of the rope 20a when the covering material 30 is being stretched. The fixed base 60 is preferably lightweight enough to allow it to be moved to an adjacent stretching position after stretching the covering material 30. The fixed base 60 may be equipped with wheels for movement, like the machine platform 16, as long as it has a structure that prevents it from moving from a predetermined position during the stretching operation. The fixed base 60 may extend continuously along the lateral direction of the slope A over the intended range over which multiple covering materials 30 are to be stretched. In this case, only a portion including two pulleys 62 may be removed from the fixed base 60 and moved to an adjacent extended position. A fixed base 60 may be provided independently for each pulley 62. Ropes 20a, 20b are wound around the pulleys 62 between the first hoisting machine 11 and the second hoisting machine 12.

[0028] In addition, in this embodiment, the pulley 62 is provided on the fixed base 60 because the drive mechanism is provided on the machine base 16, but if the drive mechanism is provided on the fixed base 60, the pulley 62 may be provided on the machine base 16. Furthermore, if the drive mechanism is provided on the fixed base 60, the pulley 62 may not be necessary if one end of the transmission means extending from the drive mechanism is fixed to the tip 34 of the covering material 30 and configured to pull directly.

[0029] The resistance means is a means for generating tensile stress inside the covering material 30 that is moving in the extension direction E by the tension means. Tensile stress is a force generated inside the covering material 30 along the extension direction E. In order to generate tensile stress inside the covering material 30, it is necessary to generate a force that resists the extension in the direction opposite to the direction in which the covering material 30 is extended. Since the tip 34 of the covering material 30 is pulled toward the top of the slope A by the rope 20b, the resistance means is disposed on the side of the feed-out unit 14 from which the covering material 30 is unwound. In this embodiment, the resistance means is a brake mechanism 18 that directly clamps the covering material 30 being unwound from the feed-out unit 14 to generate friction. The resistance means may be configured to apply tension to the covering material 30 being pulled by the rope 20b, and any configuration other than the brake mechanism 18 may be used. For example, a means for limiting the rotation speed of the winding core 36 may be provided in the portion supporting the winding core 36, or the feed-out unit 14 may be configured, for example, by an electric motor. When a driving device such as a drive shaft or a drive shaft is provided, the dispensing speed may be controlled. Furthermore, weights or the like may be attached to both side ends of the covering material 30 when it is being extended. A plurality of weights or the like are arranged at intervals in the extension direction E at the side ends of the covering material 30. This allows the weights to be installed at predetermined intervals along the slope A while the covering material 30 is being extended, and there is no need for workers to move along the slope A to install the weights. The presence of the weights at the side ends of the covering material 30 makes it less likely that the covering material 30 will be blown up by lateral wind during and after extension.

[0030] The brake mechanism 18 in FIG. 2 includes an actuator 18a, a presser member 18b, and a receiving member 18c. The brake mechanism 18 is preferably disposed adjacent to the feed-out unit 14. The actuator 18a and the receiving member 18c are fixed to the machine base 16. The presser member 18b is fixed to a rod that can be moved back and forth by the actuator 18a. The presser member 18b and the receiving member 18c are disposed with the covering material 30 sandwiched between them. The presser member 18b and the receiving member 18c are rod-shaped members that extend along the wound covering material 32 in the feed-out unit 14. Both ends of the receiving member 18c are fixed to, for example, the machine base 16. The brake mechanism 18 drives the actuator 18a to move the presser member 18b toward the covering material 30 on the receiving member 18c, and the frictional force between the presser member 18b and the covering material 30 restricts the payout of the covering material 30. Because the tip 34 is pulled toward the pulley 62 by the rope 20b, tensile stress is generated inside the covering material 30, and the covering material 30 is stretched in the stretching direction E while under tension. The length of the holding member 18b can be set to a length that can generate sufficient frictional force. For example, there may be one holding member 18b, or there may be two or more holding members 18b. When there are two or more holding members 18b, it is preferable to position them near at least both ends of the covering material 30 in the width direction, because this prevents the covering material 30 from wrinkling.

[0031] When the first hoist 11 and the second hoist 12 are used to stretch the covering material 30, the tension applied to the tensioning means can be increased by at least 10 N by generating a tensile stress using the resistance means. The covering material stretching device 10 generates a high tensile stress inside the covering material 30 by increasing the tensile force applied to the tensioning means by 10 N or more compared to when the resistance means is not in use, thereby preventing the covering material 30 from being rolled up by wind blowing at the construction site. In this embodiment, the ropes 20b are fixed near both ends of the fixed rod 40, increasing the tensile force by 10 N or more in each rope 20b. The tensile force can be measured using a tension-type load meter 25 inserted into the rope 20b near the tip 34 of the covering material 30. A load meter 25 is preferably provided on each of the two ropes 20b. For example, one end of the load meter 25 is fixed to the rope 20b on the fixed rod 40 side, and the other end of the load meter 25 is fixed to the rope 20b on the pulley 62 side.

[0032] The tension means and resistance means can apply a tension to the covering material 30 that will not cause the covering material 30 to roll up in winds with a wind speed of 10 m / s or less. Because the extension work continues in winds with a wind speed of less than 10 m / s, it is preferable that the covering material 30 not roll up in winds with a wind speed of at least 10 m / s. In order to prevent the covering material 30 from rolling up in winds with a wind speed of about 10 m / s, it is preferable to apply the resistance means such that the tension acting on each of the ropes 20b increases by at least 10 N, for example.

[0033] The width of the covering material 30 in the direction perpendicular to the deployment direction E can be 1.8 m to 3.6 m. The width of the covering material 30 used for deployment work on slope A is often 1.8 m to 3.6 m, and covering materials 30 with widths of 1.8 m or more are easily affected by wind. If wind gets in between the covering material 30 and slope A during deployment without the resistance means being applied, the covering material 30 will flap violently up and down, causing the work to be interrupted. By applying the resistance means to generate tensile stress in the covering material 30 as in this embodiment, even covering materials 30 with a width of 1.8 m to 3.6 m will not sway violently in winds with a wind speed of 10 m / s or less, and deployment work can be continued.

[0034] Tensile test in extension direction E according to JIS L1096A method (cut strip method) A blue sheet with a tensile strength of 310 N (sample width 5 cm, grip interval 20 cm, tensile speed 20 cm / min) was used as the covering material 30, and a wind resistance test was carried out in a stretched state. A wind speed of 7.5 m / s was generated from the side of the covering material 30 (in a direction perpendicular to the stretched direction) using a blower. The wind pressure (Pa) at a wind speed of 7.5 m / s was 1 / 2 × 1.225 kg / m 3 (air density) x (7.5 m / s) 2 The pressure was 34.5 Pa. The end of the covering material 30 on the blower side rose up in a roughly arched shape to a maximum height of approximately 0.5 m. The rope pulling the covering material 30 in the extension direction exerted a tensile force of 103.9 N, as measured by a load meter. The covering material 30 in the extended state was taken as the base (length 10 m), and the area of ​​the arch shape when the covering material 30 rose up was taken as the pressure-receiving area (3.3 m 2 ), the calculated tensile strength of the covering material 30 is 113.9 N (34.5 Pa x 3.3 m 2 Therefore, the tensile force acting on the covering material 30 at a wind speed of 10 m / s (wind pressure of 62.3 Pa) is 205.6 N (62.3 Pa x 3.3 m 2 Therefore, the tensile force (total tensile force acting on the ropes 20a, 20b) at which the covering material 30 is not pulled up by a wind with a wind speed of 10 m / s is preferably, for example, 210 N or more, and can be, for example, 500 N or less when the capacity of the pulling means is taken into consideration.

[0035] In this way, with the covering material spreading device 10, even if the wind blows during the spreading work of the covering material 30, the covering material 30 is unlikely to be blown up by the wind, so the spreading work can be continued and work efficiency is excellent.

[0036] A method for spreading the covering material 30 on the slope A using the covering material spreading device 10 will be described.

[0037] The method for spreading the coating material is, for example, (a) The wound covering material 32 is placed in the delivery section 14, (b) winding the tip 34 of the covering material 30 around a fixed rod 40 arranged near the delivery section 14; (c) fixing the covering material 30 to the fixed rod 40 with a plurality of attachments 50; (d) After steps (a) to (c), the first hoisting machine 11 is driven to wind up the rope 20b via the pulley 62, and the second hoisting machine 12 is driven to apply tension to the ropes 20a and 20b, thereby moving the fixed rod 40 away from the slope A, and at the same time, the brake mechanism 18 is activated to generate tensile stress inside the covering material 30, and the covering material 30 is stretched on the slope A.

[0038] moreover, (e) Fix the tip 34 of the covering material 30 stretched on the slope A together with the fixing rod 40 to the top of the slope A; (f) After (e), remove the ropes 20a and 20b from the fixed rod 40. (g) Moving the dressing deployment device 10 to the next adjacent deployment position.

[0039] By repeatedly carrying out at least the steps (a) to (g) above, a slope A covered with a plurality of covering materials 30 can be formed.

[0040] The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations with the same function, method, and result, or configurations with the same purpose and effect). The present invention also includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. The present invention also includes configurations that achieve the same effects or purposes as the configurations described in the embodiments. The present invention also includes configurations in which publicly known technology is added to the configurations described in the embodiments. [Explanation of symbols]

[0041] 10... covering material spreading device, 11... first hoist, 12... second hoist, 14... delivery section, 16... machine base, 18... brake mechanism, 18a... actuator, 18b... pressing member, 18c... receiver Member, 20a, 20b... rope, 25... load meter, 30... covering material, 32... wound covering material, 34... tip, 36... winding core, 40... fixed rod, 50... mounting fixture, 60... fixed base, 62... pulley, A... slope, E... extension direction

Claims

1. A coating material spreading device that spreads a coating material on a slope, A drive mechanism; a tensioning means for transmitting the driving force of the driving mechanism to the covering material; a resistance means for generating a tensile stress on the covering material that is moved in the extension direction by the tension means; A coating material deployment device comprising:

2. 2. The coating material deployment device according to claim 1, 10. A coating expansion device, comprising: a tension means for increasing the tension force acting on the tension means by at least 10 N when the tension stress is generated by the resistance means;

3. The coating material deployment device according to claim 1 or 2, The tensioning means and the resistance means apply a tensioning force to the covering material that does not cause the covering material to be rolled up in winds with a wind speed of 10 m / s or less.

4. The coating material deployment device according to claim 1 or 2, The covering material spreading device is characterized in that the covering material has a width of 1.8 m to 3.6 m in a direction perpendicular to the spreading direction.

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