JP5883486B2 - Oil leakage prevention material for hydraulic hose, oil leakage prevention method and pile construction method - Google Patents

Description

  The present invention relates to an oil leakage preventing material and an oil leakage preventing method for use by wrapping around a hydraulic hose, and a method for constructing a pile using the same.

  A large number of hydraulic hoses are used at the site of pile driving or drawing using a hydraulic system such as a pile punching machine. There are a variety of such sites on the sea, underwater, rivers, and land. In that case, if hydraulic oil or lubricating oil flows out due to loosening of the screw of the joint part of the hydraulic hose or damage of the hose itself, these places are polluted. Even with biodegradable hydraulic fluid, temporary environmental pollution is inevitable if it is in large quantities. The amount of oil in the hydraulic system is usually 100 to 600 liters / minute per hose. Therefore, since a large amount of oil flows out in a short time, when a hydraulic hose is damaged, it is important to prevent early leakage and early detection.

  Patent Document 1 discloses an oil leakage prevention device that is wound around a joint portion of an oil supply hose, and includes a winding portion provided with a winding fixing means, and an oil absorption bag provided on the back side of the winding portion. .

  Patent Document 2 discloses a detection paint for detecting an oil leak. When a paint is applied to a pipe or pipe in advance, the oil-soluble dye in the white paint is dissolved by the oil that oozes out due to the oil leak. A dark colored instruction pattern is formed.

JP 2004-116579 A Japanese Patent Laid-Open No. 11-44605

  The oil leakage prevention device described in Patent Document 1 is for a joint portion of an oil supply hose, and a portion where oil leakage may occur is obvious, and can only cope with a limited range and a specific pipe diameter. It cannot be used when it is impossible to predict where oil leakage will occur, or when a very long hydraulic hose or various types of hydraulic hoses with greatly different pipe diameters coexist. In a construction site using a hydraulic system such as a pile punching machine, there are a large number of hydraulic hoses with various pipe diameters, and there are a great number of places where there is a risk of oil leakage. Therefore, the oil absorbent material having a limited application range as in Patent Document 1 is not versatile and the installation work becomes complicated.

  The detection paint for detecting oil leakage based on the color change described in Patent Document 2 needs to be applied to a portion where oil leakage is likely to occur, and has no effect of preventing oil leakage itself.

  In view of the above situation, the present invention is an oil leakage prevention material that is wound around a hydraulic hose to prevent oil leakage to the surroundings, and can be attached to various pipe diameters and lengths with a simple operation. An object is to provide an oil leakage prevention material. Another object of the present invention is to provide an oil leakage preventing material that can easily detect oil leakage from a hydraulic hose. Furthermore, an object of the present invention is to provide an oil leakage prevention method and a pile construction method using such an oil leakage prevention material.

  In order to achieve the above object, the present invention provides the following configuration. The numbers in parentheses are reference numerals in the drawings described later, and are attached for reference.

A first aspect of the present invention is an oil leakage prevention material (1C) for use by being wound around a hydraulic hose, and is a strip-like and curved in the width direction when wound around a hydraulic hose. The transparent resin sheet (11) that can be deformed into a shape and the pair of edges (11a, 11b) that overlap when the transparent resin sheet (11) is deformed into a tubular shape can be joined to each other. A pair of hook-and-loop fastener layers (12, 13) and a pair of edges (11a, 11b) that overlap when the transparent resin sheet (11) is deformed into a tubular shape, provided on one surface of the other A sealing adhesive layer (14) that can be adhered and sealed to the surface of
Comprising a, an oil absorption unit sheet layer provided on the inner surface (20) that when the transparent resin sheet (11) is deformed into the tubular, the oil absorbing unit sheet layer (20) is 1 or more The oil absorption units are arranged in the vertical and horizontal directions, and each oil absorption unit includes the bag portion (20a) in which a pair of sheet members (21, 22) are stacked, and the periphery of the bag portion (20a). The sealing part (20b) which joined a pair of sheet | seat member (21,22), and the powdery oil gelling agent (23) with which the said bag part (20a) was filled were comprised, It is characterized by the above-mentioned.

In the first aspect described above, a coupling sealing adhesive layer (16) is provided on one surface of at least one edge in each pair of two opposing edges in the transparent resin sheet (11) , When connecting a plurality of the oil leakage prevention materials (1C) in the width direction or the length direction, they can be connected using the connecting sealing adhesive layer (16). Furthermore, a reinforcing material is embedded in the transparent resin sheet .

In the first aspect, in order to absorb expansion of the hydraulic hose when filled with pressure oil, the transparent resin sheet (11) is formed with an extension allowance that can be extended in the circumferential direction when deformed into a tubular shape. The extension allowance is formed as a ridge extending in the length direction in a portion other than the pair of hook-and-loop fastener layers (12, 13) in the transparent resin sheet (11). To do. As another aspect of the extension allowance, the extension allowance is formed as a ridge extending in the length direction of the joint portion of the pair of surface fastener layers (12, 13) in the transparent resin sheet (11). It is characterized by being.

The second aspect of the present invention is an oil leakage prevention material (1A) for use by being wound around a hydraulic hose, and has a belt-like shape and is curved in the width direction when wound around the hydraulic hose. The deformable transparent resin sheet (11) and a pair of edges (11a, 11b) that are overlapped when the transparent resin sheet (11) is deformed into a tubular shape can be joined to each other. A pair of hook-and-loop fastener layers (12, 13), and the transparent resin sheet (11) has a circumferential direction when deformed into a tubular shape in order to absorb expansion of the hydraulic hose when filled with pressure oil. The stretch allowance is formed and is in close contact with the hydraulic hose so that the hydraulic hose does not move freely before filling with the pressure oil, and the stretch allowance in the transparent resin sheet (11) Joining of the pair of hook-and-loop fastener layers (12, 13) Folded the frequency in the circumferential direction, characterized in that it is formed as a fold extending in the longitudinal direction.

  One aspect of the method for preventing oil leakage of a hydraulic hose using the hydraulic hose oil leakage preventing material (1A, 1B, 1C) of any one of the above aspects is provided for the hydraulic hose around one or more hydraulic hoses. The oil leakage prevention material (1A, 1B, 1C) is deformed into a tubular shape and wound, and a pair of overlapping edges (11a, 11b) are formed by the hook-and-loop fastener layer (12, 13) or the hook-and-loop fastener layer (12, 13) and the sealing adhesive layer (14).

Upper Symbol second aspect of hydraulic hoses oil leakage prevention material (1A, 1B) and an oil leakage prevention method of hydraulic hose with fixed by winding an oil absorption unit sheet (30) to the joint portion in the hydraulic hose After that, the hydraulic hose oil leakage prevention material (1A, 1B) is transformed into a tubular shape around one or a plurality of the hydraulic hoses, and the pair of overlapping edge portions (11a, 11b) are connected to the surface fastener. Fixed by the layer (12, 13) or by the hook-and-loop fastener (12, 13) and the sealing adhesive layer (14), and the oil absorption unit sheet (30) includes one or more oil absorption units. Each oil absorption unit is configured by arranging the pair of sheet members (31, 32) and a pair of sheet members (30a) at the periphery of the bag portion (30a). 31, 32) and the sealed portion (30b) and the bag portion (30a) are filled An oil leakage prevention method for a hydraulic hose, comprising: a powdery oil gelling agent (33).

  The aspect of the construction method of the pile which drives or pulls out the pile using the pile punching machine according to the present invention is the oil of the hydraulic hose described above in order to wind it around a place where there is a possibility of oil leakage in the hydraulic hose of the pile punching machine. After performing the leak prevention method, the pile is driven or pulled out by a pile punching machine.

  The oil leakage preventing material according to the present invention can be wound and fixed over almost the entire length of the hydraulic hose by deforming the strip-shaped transparent resin sheet into a tubular shape, and the oil leakage can be prevented from any part of the hose body part and the joint part. Even if it occurs, it can respond. Thereby, the spreading | diffusion and scattering of the oil to the circumference | surroundings from a hydraulic hose can be prevented reliably. Moreover, since it is transparent, it is easy to find the location of oil leakage from the outside.

  Since the hook-and-loop fastener layer for deforming and fixing the transparent resin sheet into a tubular shape can be easily temporarily fixed, removed and rewound at the time of winding, the winding work can be efficiently performed. Moreover, since it has extended over the edge part full length of a transparent resin sheet, there also exists sufficient fixing force and also has the sealing force with respect to a certain amount of oil.

  In the edge part of a transparent resin sheet, in addition to the hook-and-loop fastener layer, when the sealing adhesive material layer sealed by adhesion | attachment is provided, reliable sealing with respect to oil is realizable.

  When the oil absorption unit sheet layer is provided on the inner surface side when the transparent resin sheet is wound, the powdered oil gelling agent in the bag part absorbs the leaked oil and gels, so that the surrounding area can be more reliably discharged. Oil diffusion and scattering can be prevented.

FIG. 1 is a plan view showing a first embodiment of the oil leakage preventing material of the present invention. FIG. 1A is a plan view similar to FIG. 1, showing another embodiment of the transparent resin sheet in the oil leakage preventing material of FIG. FIG. 2 is an II cross-sectional view of the first embodiment of the oil leakage preventing material shown in FIG. 1A. FIG. 3 is a cross-sectional view showing a state in which the first embodiment of the oil leakage preventing material shown in FIG. 1A is attached to a hydraulic hose. FIG. 4 is a plan view showing a second embodiment of the oil leakage preventing material of the present invention. FIG. 5 is an II-II enlarged cross-sectional view of the second embodiment of the oil leakage preventing material shown in FIG. FIG. 6 is a cross-sectional view of a state in which the second embodiment of the oil leakage preventing material shown in FIG. 4 is attached to a hydraulic hose. (A) shows the middle stage of attachment, and (b) shows after completion of attachment. FIG. 7 is a plan view showing a third embodiment of the oil leakage preventing material of the present invention. FIG. 8 is an III-III enlarged cross-sectional view of the third embodiment of the oil leakage preventing material shown in FIG. FIG. 9 is a cross-sectional view of a state in which the third embodiment of the oil leakage preventing material shown in FIG. 7 is attached to a hydraulic hose. (A) shows the middle stage of attachment, and (b) shows after completion of attachment. FIG. 10 is a diagram showing various usage forms of the oil leakage preventing material of the present invention. FIG. 11 is a view showing another usage pattern of the oil leakage preventing material of the present invention. FIG. 12 is a view showing a method of extending the oil leakage preventing material of the present invention in the width direction and the length direction. FIG. 13 is a plan view showing a fourth embodiment of the oil leakage preventing material of the present invention. 14A is a cross-sectional view of the state where the oil leakage preventing material shown in FIG. 13 is attached to the hydraulic hose before pressurization, and FIG. 14B is a cross-sectional view of the state after pressurization. 15 (a), 15 (b), and 15 (c) are diagrams showing examples of modifications of the oil leakage preventing material in FIG. FIG. 16: is sectional drawing of the junction part which shows 5th Embodiment of the oil leak prevention material of this invention. FIG. 17 is a cross-sectional view of the joint portion showing an example of a modified form of the oil leakage preventing material shown in FIG.

Embodiments of the present invention will be described below with reference to the drawings showing examples of the present invention.
The oil leakage preventing material of the present invention is used by being wound around a hydraulic hose. The hydraulic hose is used in a hydraulic system of a pile punching machine such as a vibro hammer. In the case of a pile punching machine, a hydraulic hose is used as a piping member of a bearing oil supply device to a pile gripping device, a machine body, an electric motor, a gear device, etc. The “around the hydraulic hose” includes both the circumference of the joint portion between the hoses, the circumference of the joint portion between the hose and various devices, and the circumference of the hose body.

FIG. 1 is a plan view showing a first embodiment of the oil leakage preventing material of the present invention.
FIG. 1A is a plan view similar to FIG. 1, showing another embodiment of the transparent resin sheet in the oil leakage preventing material of FIG.
FIG. 2 is an II cross-sectional view of the first embodiment of the oil leakage preventing material shown in FIG.

  The oil leakage prevention material 1A according to the present invention has a strip-shaped transparent resin sheet 11 as a base material. The “strip shape” typically means a constant width and an indefinite length, but here, it is assumed that a square or a rectangle is usually included. The longitudinal direction in FIG. 1 is referred to as the length direction of the transparent resin sheet 11, and the lateral direction is referred to as the width direction (the same applies to the following embodiments). The length and width of one oil leakage preventing material 1A are set in consideration of the pipe diameter and length of the target hydraulic hose. In addition, as will be described later with reference to FIG. 12, a suitable size may be obtained by connecting a plurality of regular oil leakage prevention materials. When the oil leakage prevention material is a standard, for example, the length is 3 m, 5 m, 10 m, 20 m, etc., and the width is 0.3 m, 0.4 m, 0.5 m, etc., but is not limited to these values. .

  When the transparent resin sheet 11 is wound around the hydraulic hose, the transparent resin sheet 11 is flexible so as to be curved in the width direction and deformable into a tubular shape. Moreover, the transparent resin sheet 11 used by this invention should just be provided with transparency of the grade which can confirm substantially the condition of an internal hydraulic hose from the outside, when the oil leak prevention material 1A is attached. The material is preferably a synthetic resin such as polyvinyl chloride, but is not limited to a specific resin. The thickness of the transparent resin sheet 11 is appropriately selected in consideration of deformability and strength.

  A transparent resin sheet 11 ′ shown in FIG. 1A is a modification of the transparent resin sheet 11 shown in FIG. 1. The hydraulic hose may be subjected to various frictions and collisions at the construction site. Accordingly, the transparent resin sheet wound around the hydraulic hose is also required to have a strength that can withstand such friction and collision. A transparent resin sheet 11 'shown in FIG. 1A has a mesh-like reinforcing material embedded in a transparent resin sheet such as polyvinyl chloride. The reinforcing material is, for example, a polyester fiber, metal fiber, carbon fiber or the like formed into a mesh shape. The thickness of the fibers and the mesh size are preferably set to such an extent that the transparency of the sheet is not impaired, that is, the inside can be observed through the transparent resin sheet 11 '. For example, the thickness of the fiber may be about 1 mm, and the mesh eye may be about 5 mm square, but is not limited to these values.

  The transparent resin sheet 11 ′ in FIG. 1A is superior in tensile strength, tear strength, and durability compared to the transparent resin sheet 11 in FIG. 1. The transparent resin sheet 11 ′ can be used in place of the transparent resin sheet 11 in other embodiments described later.

  Such a transparent resin sheet containing a reinforcing material is used for a tent material or the like. For example, there are trade names “Passive Solar (registered trademark)” and “Shimka (registered trademark)” (both manufactured by Kuraray Plastics Co., Ltd.), which can be used for the oil leakage preventing material of the present invention.

  When the transparent resin sheet 11 is deformed into a tubular shape, the edges on both sides of the transparent resin sheet 11 overlap. The transparent resin sheet 11 is provided with fixing means for holding it in a tubular shape on the opposing surfaces of a pair of edge portions 11a and 11b that overlap each other when it becomes tubular. In FIG. 1, a surface fastener layer 12 is provided on one surface of one edge portion 11a in the width direction, and a surface fastener layer 13 is provided on the other surface of the other edge portion 11b. These hook-and-loop fastener layers 12 and 13 form a pair that can be joined to each other. The surface fastener layers 12 and 13 may be attached to the transparent resin sheet 11 with, for example, a double-sided adhesive tape (not shown). The reason why the hook-and-loop fastener layer 12 is wider than the hook-and-loop fastener layer 13 is to make it possible to adjust the tube diameter to some extent when it is tubular.

  FIG. 3 is a cross-sectional view of a state in which the first embodiment of the oil leakage preventing material shown in FIG. 1 is attached to a hydraulic hose. The oil leakage preventing material of the present invention is not limited to a single hydraulic hose, but can be applied to a hydraulic hose in which a plurality of hydraulic hose are bundled. In FIG. 3, it is wound around three hydraulic hoses 51, 52, 53. When the oil leakage preventing material 1A is bent in the width direction and deformed into a tubular shape, the pair of edges 11a and 11b overlap. The hook-and-loop fastener layer 12 of the edge part 11a and the hook-and-loop fastener layer 13 of the edge part 11b are joined together, and the joint is fixed. Thereby, 1 A of oil leak prevention materials are hold | maintained at a tubular shape. When oil leakage occurs, the transparent resin sheet 11 can prevent the oil from spreading and scattering to the surroundings. In addition, although the joint part of the hook_and_loop | surface fastener layers 12 and 13 has a certain amount of oil sealing effect, in the case of a large quantity, it may leak.

FIG. 4 is a plan view showing a second embodiment of the oil leakage preventing material of the present invention.
FIG. 5 is an II-II enlarged cross-sectional view of the second embodiment of the oil leakage preventing material shown in FIG. In addition, about the same component as 1st Embodiment, it has shown using the same code | symbol (same also about the following embodiment).

  The oil leakage prevention material 1B of the second embodiment differs from the oil leakage prevention material 1A of the first embodiment described above in that a pair of edge portions 11a and 11b that overlap when the transparent resin sheet 11 is deformed into a tubular shape. The sealing adhesive layer 14 is provided on one of the opposing surfaces. In this example, it is provided at the edge 11a, but may be provided at the edge 11b. The sealing adhesive layer 14 is provided over the entire length in parallel with the wide surface fastener layer 12 of the edge portion 11a. Since the surface of the sealing adhesive layer 14 is tacky, an appropriate release paper 15 is stuck before use. The sealing adhesive layer 14 may be, for example, a double-sided adhesive tape. In the case of a double-sided adhesive tape, only the release paper on the back side is removed and pasted on the transparent resin sheet 11. The release paper 15 on the front side is removed when the oil leakage preventing material 1B is wound around the hydraulic hose.

  FIG. 6 is a cross-sectional view of a state in which the second embodiment of the oil leakage preventing material shown in FIG. 4 is attached to a hydraulic hose. (A) shows the middle stage of attachment, and (b) shows after completion of attachment. In FIG. 6A, when the oil leakage preventing material 1B is bent in the width direction and deformed into a tubular shape and wound around the three hydraulic hoses 51, 52, 53, the pair of edges 11a and 11b overlap. The hook-and-loop fastener layer 12 of the edge part 11a and the hook-and-loop fastener layer 13 of the edge part 11b are joined together, and the joint is fixed. Thereby, the oil leakage preventing material 1B is held in a tubular shape. Subsequently, the release paper 15 on the surface of the sealing adhesive layer 14 is removed. As shown in FIG. 6B, the sealing adhesive layer 14 is adhered to the edge of the opposing transparent resin sheet 11. This sealing adhesive layer 14 serves to shield oil. Thereby, even if oil leaks from the hydraulic hose 51 etc., it can stay in the pipe | tube of the transparent resin sheet 11, and can be reliably prevented from diffusing and scattering around.

FIG. 7 is a plan view showing a third embodiment of the oil leakage preventing material of the present invention.
FIG. 8 is an III-III enlarged cross-sectional view of the third embodiment of the oil leakage preventing material shown in FIG.

  The oil leakage prevention material 1C of the third embodiment is different from the oil leakage prevention material 1B of the second embodiment described above in that the oil absorption is absorbed on the inner surface when the transparent resin sheet 11 is deformed into a tubular shape. The unit sheet layer 20 is provided.

  The oil absorption unit sheet layer 20 is configured by arranging one or a plurality of oil absorption units in the vertical and horizontal directions. Each oil absorption unit includes a bag portion 20a in which a pair of sheet members 21 and 22 are stacked, and a sealing portion 20b in which the pair of sheet members 21 and 22 are joined together by bonding, welding, pressure bonding, or the like at the periphery of the bag portion 20a. It comprises. The sealing part 20b is shared with the adjacent oil absorption unit. At least the sheet member 21 on the front side is oil permeable. The sheet members 21 and 22 are, for example, nonwoven fabrics. Each oil absorption unit has, for example, a width of about 65 to 70 mm and a length of about 70 to 80 mm, but is not limited to these ranges.

  The bag portion 20a is filled with a powdery oil gelling agent 23. The powdery oil gelling agent 23 is made of a lipophilic polymer, and when oil is absorbed, the oil is retained in the space between the molecular chains and swells. That is, the powder gels into a jelly form or a solid form. As such a powdery oil gelling agent, there is, for example, trade name Alpha Gel manufactured by Japan Corporation. The powdery oil gelling agent 23 is selected to be suitable for the type of oil used in the target hydraulic hose.

  The oil absorption unit sheet layer 20 is attached on the transparent resin sheet 11 by, for example, a double-sided adhesive tape (not shown). When a double-sided adhesive tape is used, it can be separated from the transparent resin sheet 11 after use and disposed of separately.

  FIG. 9 is a cross-sectional view of a state in which the third embodiment of the oil leakage preventing material shown in FIG. 7 is attached to a hydraulic hose. (A) shows the middle stage of attachment, and (b) shows after completion of attachment. The oil leakage preventing material 1C includes the hook-and-loop fastener layers 12 and 13 and the sealing adhesive material layer 14 (with the release paper 15) as fixing means when deformed into a tubular shape. This is the same as the oil leakage preventing material 1B of the illustrated second embodiment.

FIG. 10 is a diagram showing various usage forms of the oil leakage preventing material of the present invention.
FIG. 10A1 shows an actual example of a hydraulic hose, and one end of the hose body 54 and the hose body 55 are connected by a joint portion 61. The other ends of the hose bodies 54 and 55 are connected to devices and the like by joint portions 62 and 63. The joint portions 61, 62, and 63 have joint fittings, bolts, and the like. If these joints are loosened or damaged, there is a risk of oil leakage. The hose bodies 54 and 55 are usually formed of a flexible material, and there is a risk of oil leakage due to aging or friction or collision with other hydraulic hoses.

  FIG. 10 (a2) shows a state where the oil leakage preventing material 1A or 1B of the first or second embodiment described above is wound around the hydraulic hose shown in FIG. 10 (a1). The oil leakage prevention materials 1A and 1B are fixed in a tubular form by a surface fastener layer or by a surface fastener layer and a sealing adhesive layer. In actual construction, it is further preferable to fasten the important points with a binding band or the like. For example, the end of the joint is fastened with a binding band 71 as shown in the figure. For example, in the case of a long hydraulic hose of several tens of meters, it is preferable to fasten with a binding band for each predetermined length. This is to keep the oil within a limited range as much as possible when an oil leak occurs.

  In addition, it is preferable to use different oil leakage prevention materials for the hydraulic hose inside the apparatus such as the vibrator body of the vibratory hammer and the hydraulic hose outside the apparatus. Since the hydraulic hose inside the apparatus has relatively large movement, friction and collision, it is preferable in terms of cost to use an oil leakage prevention material made of the transparent resin sheet 11 not containing a reinforcing material. On the other hand, since the hydraulic hose outside the apparatus is often exposed to various movements, friction, and collisions, it is necessary to use the oil leakage prevention material by the transparent resin sheet 11 ′ with a reinforcing material shown in FIG. 1A. preferable. Even in the inside of the apparatus, it is preferable to use a transparent resin sheet 11 'containing a reinforcing material in a hydraulic hose where vibration measures and strength measures are required.

  FIG. 10B shows a work situation in which the oil leakage preventing material 1 </ b> B of the second embodiment described above is wound around a plurality of hydraulic hoses 51, 52, 53. First, the hydraulic hoses 51, 52, 53 bundled on the oil leakage prevention material 1B developed in a plane are placed, and the oil leakage prevention material 1B is tubular from one end to the other end of the oil leakage prevention material 1B. Then, both edges of the joint are fixed by the hook-and-loop fastener layers 12 and 13 and the sealing adhesive layer 14. Furthermore, it is fastened with a binding band 71 for each appropriate length.

FIG. 11 is a view showing another usage pattern of the oil leakage preventing material of the present invention.
Fig. 11 (a1) is a plan view of an example of the oil absorption unit sheet 30 used in this usage pattern, and Fig. 11 (a2) is a sectional view taken along the line IV-IV of (a1). The oil absorption unit sheet 30 has basically the same configuration as the oil absorption unit sheet layer 20 in the oil leakage prevention material 1C of the third embodiment described above, but in this example, is a separate member from the oil leakage prevention material. The oil leakage prevention material (oil leakage prevention material 1A or 1B) of the present invention is used in combination.

  The oil absorption unit sheet 30 is configured by arranging one or a plurality of oil absorption units in the vertical and horizontal directions. Each oil absorption unit has a bag portion 30a in which a pair of sheet members 31 and 32 are stacked, a sealing portion 30b in which a pair of sheet members 31 and 32 are joined at the periphery of the bag portion 30a, and filling in the bag portion 30a. The powdered oil gelling agent 33 is provided. Furthermore, an adhesive layer 34 may be appropriately provided on the peripheral edge of the sheet.

  FIG. 11 (b1) shows an example of a hydraulic hose to be applied. One ends of the hose body 54 and the hose body 55 are connected by a joint portion 61, and the other end of the hose body 54 is connected to a device or the like by a joint portion 62. First, as shown in FIG. 11 (b 2), the oil absorption unit sheet 30 is wound around the joint portions 61 and 62 where oil leakage is likely to occur, and is fixed using the adhesive layer 34. A binding band may be used instead of the adhesive layer 34.

  Next, as shown in FIG. 11 (b3), the oil leakage preventing material 1A or 1B of the first or second embodiment described above is wound around the entire hose body and the joint portion and fixed. In this example, a part where oil leakage is likely to occur can be reinforced with the oil absorbing unit sheet 30 as a separate member. Further, the oil leakage preventing material 1A or 1B can be manufactured at a lower cost than the oil leakage preventing material 1C of the third embodiment.

  In addition, although not shown in figure, about the hydraulic hose inside an apparatus, only the oil absorption unit sheet | seat 30 may be wound around the whole hydraulic hose including a hose main body and a joint part.

  FIG. 12 is a view showing a method of extending the oil leakage preventing material of the present invention in the width direction and the length direction. Although the oil leakage preventing material 1A of the second embodiment described above is taken as an example, it can also be applied to the oil leakage preventing material 1B or 1C of other embodiments.

  As shown in the plan view of FIG. 12 (a), the transparent resin sheet 11 is connected on one surface of at least one edge in each pair of two opposite edges 11a and 11b and edges 11c and 11d. Sealing adhesive layer 16 (release paper is not shown). For example, a double-sided adhesive tape is used as the connecting sealing adhesive layer 16.

  FIG. 12B is a plan view showing a state in which four oil leakage preventing materials 1A are connected. For example, when connecting the oil leakage prevention material 1A-1 in the width direction, the left edge of the right oil leakage prevention material 1A-2 using the connecting sealing adhesive layer 16 provided on the right edge. Can be connected by bonding to the part.

  Further, for example, when connecting the oil leakage prevention material 1A-1 in the length direction, the lower side of the upper oil leakage prevention material 1A-3 using the connecting sealing adhesive layer 16 on the upper edge is used. Can be connected by bonding to the edge.

  In this way, by connecting a fixed oil leakage prevention material in the width direction and the length direction, an oil leakage prevention material having a required size can be obtained. In addition to the edge portions 11a and 11c in FIG. 12, the connecting sealing adhesive layer 16 may be provided on the edge portions 11b and 11d facing each other. When it is provided on all four edges, it can be freely connected to improve workability.

  In addition, about the oil leak prevention materials 1B and 1C of the second and third embodiments described above, the sealing adhesive layer 14 is already provided on the right edge portion 11a. The adhesive layer 14 is used as a connecting sealing adhesive layer.

  Finally, the construction method of the pile which drives or draws out a pile using the oil leak prevention material of this invention is demonstrated. First, the size of the oil leakage prevention material necessary for each of the places where there is a possibility of oil leakage of the hydraulic hose of the pile punching machine is determined. The oil leakage prevention material is connected to the width direction and / or the length direction so as to have a necessary size. Next, the oil leakage prevention material is wound around the hydraulic hose by the method shown in FIG.

  Thereafter, the pile is driven or pulled out by a pile punching machine. Since the oil leakage preventing material of the present invention uses a transparent resin sheet as a base material, it is easy to find oil leakage from the outside. If an oil leak is found during construction, stop the construction and inspect and maintain the area.

With reference to FIGS. 13 to 17, still another embodiment of the oil leakage preventing material of the present invention is shown.
At the time when the oil leakage prevention material of the present invention is wound around the hydraulic hose as preparation for construction, the hydraulic hose is not filled with pressurized oil and is not pressurized. Since the hydraulic hose is an elastic material, it expands and expands in diameter when filled with pressure oil. In addition to this, the hydraulic hose that has been bent or twisted before pressurization is in a state of being linearly tensioned simultaneously with pressurization. Therefore, when the oil leakage prevention material is closely wound around the hydraulic hose before pressurization, an event occurs in which the joint portion between both edges of the oil leakage prevention material is released as soon as the pressure is applied.

  In order to cope with this problem, it is necessary to provide a play that can absorb the expansion of the hydraulic hose, that is, an “elongation allowance” when the oil leakage preventing material is wound around the hydraulic hose. As the simplest method, when the oil leakage preventing material is wound around the hydraulic hose, it is only necessary to wind and join the oil leak preventing material in a relaxed manner without closely contacting the hydraulic hose. However, in a state where the hydraulic hose can move freely inside the oil leakage prevention material deformed into a tubular shape, it is difficult to move or arrange the hydraulic hose for preparation for construction.

  Therefore, before filling the pressure oil, the oil leakage prevention material can be in close contact with the hydraulic hose to ensure workability, and after filling the pressure oil, the oil leakage prevention material extends to absorb the expansion of the hydraulic hose and It is desirable that the sealed state of both edges of the transparent resin sheet can be maintained.

  In the embodiment shown in FIGS. 13 to 17, the transparent resin sheet is formed with an allowance for extending in the circumferential direction in order to absorb the expansion of the hydraulic hose when the pressure oil is filled.

FIG. 13 is a plan view showing a fourth embodiment of the present invention. (A) is a top view, (b) is IV-IV sectional drawing.
In the oil leakage prevention material 1D of the fourth embodiment, the difference from each of the above-described embodiments is that the entire transparent resin sheet 11 is not a flat surface but a plurality (six in the illustrated example) extending in the length direction. This is the point at which the ridges 17 are formed. In the example shown in the figure, when the oil leakage prevention material 1D is wound, it is formed so as to protrude toward the surface side. This ridge portion 17 becomes an extension allowance of the oil leakage preventing material 1D when the hydraulic hose expands, that is, an extension allowance of the transparent resin sheet 11. The ridge portion 17 has a waist that can maintain the shape of the chevron while it is wound around the hydraulic hose, and the chevron shape becomes nearly flat when the hydraulic hose is pressurized. It has the flexibility which can be deformed. As the material of the transparent resin sheet 11, a material that can realize the hardness of the ridges 17 is selected. As such a material, for example, there is a soft vinyl chloride resin containing an appropriate amount of a plasticizer.

  FIG. 14A is a cross-sectional view of a state in which the oil leakage prevention material 1D shown in FIG. 13 is attached to the hydraulic hoses 51, 52, and 53 before being pressurized. The oil leakage preventing material 1D is wound around the hydraulic hoses 51, 52, 53 in close contact. At this time, the protruding line portion 17 of the oil leakage preventing material 1D substantially maintains the mountain shape.

  FIG. 14B is a cross-sectional view of the hydraulic hoses 51, 52, and 53 filled with pressure oil. The hydraulic hoses 51, 52, and 53 are expanded and the pipe diameter is expanded. The oil leakage preventing material 1D is deformed by receiving the pressure of the hydraulic hoses 51, 52, 53. At this time, the height of the peak of the ridge portion 17 is reduced and the bottom is expanded, so that the oil leakage preventing material 1D can be extended in the circumferential direction. As a result, the shearing force to peel off the surface fasteners 12 and 13 and the sealing adhesive layer 14 at the joining portion is not applied, and the sealed state is maintained.

  FIGS. 15A, 15B, and 15C are views showing examples of modifications of the oil leakage preventing material shown in FIG.

  In the oil leakage preventing material 1E of FIG. 15A, convex strips 17a that are convex on the front surface side and convex portions 17b that are convex on the back surface side are alternately formed with respect to the original plane of the transparent resin sheet 11. It has a waveform. Further, in the oil leakage preventing material 1 </ b> F in FIG. 15B, one relatively large convex portion 17 is formed in the vicinity of one edge portion of the transparent resin sheet 11. In the oil leakage preventing material 1G of FIG. 15C, the direction of the ridges 17 is formed along a length direction but not in parallel but at a predetermined angle.

  The convex part formed in the transparent resin sheet 11 is not restricted to the example shown in FIGS. A convex part is formed in the whole or one part except the both edges of the transparent resin sheet 11, and the number, a position, and magnitude | size (width | variety and height) may be set suitably. As a guide, the stretch allowance of the transparent resin sheet 11 by the convex portion is approximately ¼ of the circumferential length of the transparent resin sheet 11 deformed into a tubular shape (circumference when there is no convex portion). To do. However, the size of the elongation allowance is not limited to this value.

  FIG. 16: is sectional drawing of the junction part which shows 5th Embodiment of the oil leak prevention material of this invention. In the oil leakage prevention material 1H of the fifth embodiment, the allowance for the transparent resin sheet 11 is provided at the joint portion of both edge portions that overlap when deformed into a tubular shape.

  FIG. 16A is a cross-sectional view showing a state before the pair of edge portions 11a and 11b of the transparent resin sheet 11 are joined. Surface fastener layers 12 and 13 are provided on the edge portion 11a and the edge portion 11b, respectively, as in the above-described embodiment. However, the length in the width direction of each hook-and-loop fastener layer is set to a length suitable for this embodiment. Further, the positions of the sealing adhesive layer 14 and the hook-and-loop fastener 12 are opposite to those of the above-described embodiment, but the functions of the sealing adhesive layer 14 are exactly the same. In the present embodiment, a folding surface fastener layer 121 is further provided on the surface of the edge portion 11a located on the upper side when they are overlapped. The hook-and-loop fastener layer 121 for folding is located on the opposite side of the hook-and-loop fastener layer 12. The oil leakage preventing material 1H is wound around one or a plurality of hydraulic hoses (not shown) to form a tubular shape, and both edge portions 11a and 11b are overlapped and joined as indicated by an arrow.

  FIG. 16B is a cross-sectional view of a state in which the hook-and-loop fastener layer 12 of the edge portion 11a and the hook-and-loop fastener layer 13 of the edge portion 11b are joined to each other and the seam is fixed. At this time, the sealing adhesive layer 14 is also bonded to the edge portion 11b. This state is the same as in the above-described embodiment. However, in the present embodiment, the seam is fixed after being wound around the hydraulic hose with a predetermined clearance in order to enable the next folding operation. Thereafter, the joint portions of both edge portions 11a and 11b are folded back as indicated by arrows.

  FIG. 16C is a cross-sectional view in a state in which the joined edge portions 11a and 11b are folded back. When folded as indicated by the arrow (b), the folding surface fastener layer 121 faces the surface fastener layer 13, and these are joined. By this folding, one tack extending in the longitudinal direction is formed. The edge portion 11a is folded so as to reciprocate once in the ridge portion.

  Thereafter, when the hydraulic hose expands when the hydraulic hose is filled with the pressure oil, the joined portion of the folding hook-and-loop fastener layer 121 and the hook-and-loop fastener layer 13 is released, and the state returns to the state of FIG. Even in the state of FIG. 16B, the oil leakage preventing effect is maintained by the bonding of the surface fastener layer 12 and the surface fastener layer 13 and the sealing adhesive layer 14. In the present embodiment, the ridge formed by folding back the joint portions of both edge portions 11 a and 11 b plays a role of the circumferential expansion margin of the transparent resin sheet 11. In this case, the expansion margin of the transparent resin sheet 11 is about twice the length ΔL of the folded portion of the edge portion 11a.

  FIG. 17 is a diagram illustrating an example of a modified form of the oil leakage preventing material illustrated in FIG. 16. The oil leakage preventing material 1K of this modified form is different from the form of FIG. 16 in the sealing method and the folding method of the joint portion.

  FIG. 17A is a cross-sectional view showing a state before the pair of edge portions 11a and 11b of the transparent resin sheet 11 are joined. In this embodiment, the hook-and-loop fastener layers 12 and 13 are provided on the back surfaces of both the edge portion 11a and the edge portion 11b. As shown by the arrows, they are overlapped so that the back surfaces of both edge portions 11a and 11b face each other. The sealing adhesive layer 14 is provided on the back side of the one edge portion 11a.

  FIG. 17B is a cross-sectional view of a state in which the hook-and-loop fastener layer 12 of the edge portion 11a and the hook-and-loop fastener layer 13 of the edge portion 11b are joined to each other and the seam is fixed. At this time, the sealing adhesive layer 14 is also bonded to the edge portion 11b. However, in order to enable the next folding operation, the seam is fixed with a predetermined clearance after being wound around the hydraulic hose. Thereafter, the joint portions of both edge portions 11a and 11b are folded back as indicated by arrows. This folding is performed so that the folding hook-and-loop fastener layers 131 and 132 provided on the surface side of the edge portion 11b are joined.

  FIG. 17C is a cross-sectional view showing a state in which the joined both edge portions 11a and 11b are folded back. When folded as indicated by the arrow (b), the folding surface fastener layers 131 and 132 are joined. By this folding, one tack extending in the longitudinal direction is formed. The edge portion 11b is folded so as to reciprocate once at the heel portion.

  Thereafter, when the hydraulic hose expands when the hydraulic hose is filled with the pressure oil, the joined portion of the folding hook-and-loop fastener layers 131 and 132 is first removed, and the state shown in FIG. The joining of the folding surface fastener layers 131 and 132 is weaker than the joining of the surface fastener layers 12 and 13 (for example, shortening the width). Even in the state of FIG. 17B, the oil leakage prevention effect is maintained by the bonding of the surface fastener layer 12 and the surface fastener layer 13 and the sealing adhesive layer 14. In the present embodiment, the ridge formed by folding back the joint portions of both edge portions 11 a and 11 b plays a role of the circumferential expansion margin of the transparent resin sheet 11. In this case, the expansion allowance of the transparent resin sheet 11 is at least about twice the length ΔL of the folded portion of the edge portion 11b.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1K Oil leakage prevention material 11, 11 'Transparent resin sheet 12, 13 Surface fastener layer 121, 131, 132 Folding surface fastener layer 14 Sealing adhesive material layer DESCRIPTION OF SYMBOLS 15 Release paper 16 Sealing adhesive material layer for connection 17 Convex part 20 Oil absorption unit sheet layer 20a Bag part 20b Sealing part 21 1st sheet member 22 2nd sheet member 23 Oil gelling agent powder 30 Oil absorption unit sheet 30a Bag part 30b Sealing part 31 1st sheet member 32 2nd sheet member 33 Oil gelling agent powder 34 Adhesive material layer 51, 52, 53, 54 Hydraulic hose 61, 62, 63 Joint part 71 Binding band

Claims (9)

Oil leakage prevention material (1C) for use around the hydraulic hose,
A transparent resin sheet (11) that is strip-shaped and can be deformed into a tubular shape by bending in the width direction when wound around the hydraulic hose;
A pair of hook-and-loop fastener layers (12, 13) that can be joined to each other provided on opposing surfaces of a pair of edges (11a, 11b) that overlap when the transparent resin sheet (11) is deformed into a tubular shape; ,
Sealing adhesive that is provided on one of the opposing surfaces of the pair of edges (11a, 11b) that overlap when the transparent resin sheet (11) is deformed into a tubular shape, and can be sealed by sealing to the other surface The material layer (14),
An oil absorption unit sheet layer (20) provided on the inner surface when the transparent resin sheet (11) is deformed into a tubular shape, and
The oil absorption unit sheet layer (20) is configured by arranging one or a plurality of oil absorption units in the vertical and horizontal directions, and each oil absorption unit includes a bag portion (20a) in which a pair of sheet members (21, 22) are stacked. ), A sealing part (20b) in which the pair of sheet members (21, 22) are joined at the periphery of the bag part (20a), and a powdered oil gelled filling the bag part (20a) An oil leakage prevention material for a hydraulic hose, comprising: an agent (23). A coupling sealing adhesive layer (16) is provided on one surface of at least one edge in each pair of two opposing edges in the transparent resin sheet (11),
The plurality of oil leakage prevention materials (1C) can be connected using the sealing adhesive layer for connection (16) when connecting in the width direction or the length direction. Oil leakage prevention material for hydraulic hoses.   The oil leakage prevention material for hydraulic hoses according to claim 1 or 2, wherein a reinforcing material is embedded in the transparent resin sheet. In order to absorb the expansion of the hydraulic hose when filled with pressure oil, the transparent resin sheet (11) is formed with an extension allowance that can be extended in the circumferential direction when deformed into a tubular shape,
The stretch allowance is formed as a ridge extending in the length direction in a portion other than the pair of hook-and-loop fastener layers (12, 13) in the transparent resin sheet (11),
The oil leakage prevention material for hydraulic hoses according to any one of claims 1 to 3. In order to absorb the expansion of the hydraulic hose when filled with pressure oil, the transparent resin sheet (11) is formed with an extension allowance that can be extended in the circumferential direction when deformed into a tubular shape,
The stretch allowance is formed as a ridge extending in the length direction where the joint portion of the pair of hook-and-loop fastener layers (12, 13) in the transparent resin sheet (11) is folded,
The oil leakage prevention material for hydraulic hoses according to any one of claims 1 to 3. Oil leakage prevention material (1A) for use around a hydraulic hose,
A transparent resin sheet (11) that is belt-shaped and can be deformed into a tubular shape that is curved in the width direction when wound around the hydraulic hose;
A pair of hook-and-loop fastener layers (12, 13) that can be joined to each other provided on opposing surfaces of a pair of edges (11a, 11b) that overlap when the transparent resin sheet (11) is deformed into a tubular shape; With
The transparent resin sheet (11) is formed with an expansion allowance that can extend in the circumferential direction when deformed into a tubular shape in order to absorb expansion of the hydraulic hose when filled with pressurized oil, and Before satisfying the condition, the hydraulic hose is in close contact with the hydraulic hose so that it does not move freely .
The stretch allowance is formed as a ridge extending in the length direction by folding back the joint portion of the pair of surface fastener layers (12, 13) in the transparent resin sheet (11) in the circumferential direction. And
Oil leak prevention material for hydraulic hoses. An oil leakage prevention method for a hydraulic hose using the oil leakage prevention material (1A, 1B, 1C) for a hydraulic hose according to any one of claims 1 to 6 ,
The hydraulic hose oil leakage prevention material (1A, 1B, 1C) is deformed into a tubular shape and wound around one or more hydraulic hoses, and a pair of overlapping edges (11a, 11b) are formed on the surface fastener layer ( 12, 13), or by means of the hook-and-loop fastener layer (12, 13) and the sealing adhesive layer (14). An oil leakage prevention method for a hydraulic hose using the oil leakage prevention material (1A, 1B) for a hydraulic hose according to claim 6 ,
After the oil absorption unit sheet (30) is wrapped and fixed around the joint of the hydraulic hose, the oil hose oil leak prevention material (1A, 1B) is deformed into a tubular shape around one or more of the hydraulic hoses. A pair of overlapping edges (11a, 11b) are fixed by the hook-and-loop fastener layer (12, 13) or by the hook-and-loop fastener (12, 13) and the sealing adhesive layer (14),
The oil absorbing unit sheet (30) is configured by arranging one or a plurality of oil absorbing units in the vertical and horizontal directions, and each oil absorbing unit has a bag portion (30a) in which a pair of sheet members (31, 32) are stacked. A sealing part (30b) in which the pair of sheet members (31, 32) are joined at the periphery of the bag part (30a), and a powdered oil gelling agent filled in the bag part (30a) (33). A method of preventing oil leakage from a hydraulic hose. In the construction method of the pile that drives or pulls out the pile using a pile punching machine,
After winding the hydraulic hose oil leakage prevention method according to claim 7 or 8 , in order to wrap around a portion of the hydraulic hose of the pile punching machine where there is a possibility of oil leakage, driving or pulling out the pile by the pile punching machine is performed. A pile construction method characterized by:

Images