Sediment adhesion prevention equipment

Abstract

Prevents soil from sticking to the bottom of the bucket. [Solution] A soil adhesion prevention device 1A that is attached to the inner space 53 of a bucket 50 of heavy machinery used for excavation or leveling, and that has a rod-shaped or cord-shaped earth pressure relief body 2 that is stretched across the inner space 53 of the bucket 50 and does not come into contact with the inner surface 59 of the bucket 50, with a gap between this earth pressure relief body 2 and the inner surface 59 of the bucket 50.

Description

[Technical Field]

[0001] The present invention relates to a soil adhesion prevention device that prevents soil from adhering to the inside of an excavation bucket that is operated, for example, hydraulically. [Background technology]

[0002] BACKGROUND ART Conventionally, when excavating or scooping up earth and sand with an excavation bucket operated by hydraulic pressure or the like, there has been a problem in that earth and sand adheres to the inner surface of the bucket and cannot be easily removed. In this case, in order to remove the soil and sand stuck to the inner surface of the bucket, a tool such as a hammer would be used to hit the bucket from the outside to apply an impact, or the arm to which the bucket was attached would be operated with heavy machinery to slam the bucket into the ground to apply an impact, thereby peeling off the soil and sand from the inner surface of the bucket. However, there is a risk of damaging or deforming the bucket when an impact is applied to the bucket. Furthermore, when an impact is applied to the bucket by operating the arm of a heavy machine, there is also a risk of damaging the heavy machine itself, which is undesirable. For these reasons, a bucket that does not require much effort to clean is desired. As a prior application that addresses the above-mentioned problems, for example, a device such as that shown in Patent Document 1 is known.

[0003] Patent Document 1 discloses an invention titled "earthwork bucket" that makes it difficult for soil to adhere to the inner surface of the bucket even when the soil being scooped or excavated is highly viscous. The earthmoving bucket disclosed in Patent Document 1 is characterized in that a protrusion is provided on the inner surface of the bottom plate of the bucket across almost the entire width in a direction different from the excavation direction, and guide surfaces are formed on the surface of the protrusion, positioned at least at both ends of the bottom plate in the width direction, to direct soil that enters the bucket during excavation toward the center of the bottom plate in the width direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Publication No. 56-105559 Summary of the Invention [Problem to be solved by the invention]

[0005] In the device disclosed in Patent Document 1, when the bucket is repeatedly used to dig or scoop up soil and sand, and then inverted to discharge the soil and sand from the bucket, there is a high possibility that the soil and sand will adhere and stick to the stepped surface of the protrusion attached to the inner surface of the bucket. In this case, the stepped surface of the ridge inside the bucket will disappear, and it is expected that soil and sand will eventually become stuck to the bottom of the bucket. In other words, even if the device disclosed in Patent Document 1 was used, it was difficult to reliably prevent soil and sand from adhering to the bottom of the bucket.

[0006] The present invention has been made in response to such conventional circumstances, and its purpose is to provide a soil adhesion prevention device that makes it difficult for soil to adhere to the bottom of a bucket, even when the actions of digging or transporting soil with a bucket and then inverting the bucket to discharge the soil from the bucket are repeated. [Means for solving the problem]

[0007] The first invention for solving the above problem is a soil adhesion prevention device that is attached to the interior space of a bucket of heavy machinery used for excavation or ground leveling, and is characterized by having a rod-shaped or cord-shaped earth pressure relief body that is stretched across the interior space of the bucket but does not come into contact with the inner surface of the bucket, and there is a gap between the earth pressure relief body and the inner surface of the bucket.

[0008] In the first invention having the above configuration, by suspending an earth pressure relief body inside the bucket, when excavating or scooping up earth and sand with the bucket, the earth and sand that enters the bucket from the opening toward the bottom comes into contact with the earth pressure relief body before reaching the bottom of the bucket, thereby relieving the earth pressure.

[0009] The second invention is the above-mentioned first invention, characterized in that it is provided with an attachment means for attaching the end of the earth pressure relief body to the opening periphery or inner surface of the bucket, and the earth pressure relief body is capable of swinging around a connecting structure that connects the attachment means and the earth pressure relief body as a fulcrum.

[0010] In the second aspect of the invention having the above configuration, the earth pressure reliever swings when the soil that has entered the bucket comes into contact with the earth pressure reliever, thereby further enhancing the effect of alleviating the earth pressure in the bucket.

[0011] The third invention is the first or second invention described above, characterized in that one end of the earth pressure relief body is arranged at or near the opening periphery of the bucket, while the other end is arranged near the bottom of the bucket.

[0012] In the third aspect of the invention having the above configuration, when earth and sand are excavated or scooped up with the bucket, it is possible to minimize the earth pressure of the earth and sand acting on the other end side of the earth pressure mitigating body. In addition, even when the earth pressure relief body is suspended across the interior space of the bucket, it is possible to store solid objects such as rocks that are slightly smaller than the size of the interior space of the bucket.

[0013] The fourth invention is the third invention described above, characterized in that when the bucket is viewed from the opening side with the bucket bracket positioned vertically upward, one end of the earth pressure relief body is positioned at the upper corner on the upper edge side of the opening periphery of the bucket or on the inner surface near the upper corner.

[0014] In the fourth aspect of the present invention, when earth and sand are excavated or scooped up with the bucket, it is possible to minimize the earth pressure of the earth and sand acting on the one end side of the earth pressure relief body.

[0015] The fifth invention is the first or second invention described above, characterized in that the mounting means comprises a fixing hole formed through the thickness direction of the bucket, an insertion portion that is inserted into the fixing hole, and a retaining portion that is attached to the insertion portion that protrudes from the fixing hole.

[0016] In the fifth aspect of the present invention, the attachment means can be attached to and detached from the bucket, meaning that the earth pressure absorbing body can be attached to the bucket only when necessary.

[0017] A sixth invention is the above-mentioned first or second invention, characterized in that there is only one earth pressure reliever.

[0018] In the sixth aspect of the present invention, the structure of the soil adhesion prevention device can be made extremely simple. Furthermore, when the earth pressure mitigating body is configured to be detachable from the bucket, the work of attaching and detaching the earth pressure mitigating body to the bucket can be simplified. [Effects of the Invention]

[0019] According to the first aspect of the present invention, it is possible to minimize the adhesion of soil and sand to the bottom of the bucket, which significantly reduces the amount of work required to clean the bucket after use, thereby improving the ease of maintenance of the bucket. Furthermore, since there is no need to apply an external impact to the bucket in order to clean it, damage to the bucket and heavy machinery can be prevented as much as possible. As a result, the durability of the bucket and the heavy equipment can be improved.

[0020] According to the second aspect of the present invention, it is possible to make it even more difficult for earth and sand to adhere to the inner surface, including the bottom, of the bucket, thereby further improving the maintainability of the bucket.

[0021] According to the third aspect of the present invention, it is possible to minimize damage or breakage to the other end of the earth pressure relief body caused by repeated loads due to earth pressure acting on this part. In addition, according to the third aspect of the present invention, by attaching an earth pressure absorbing body to the bucket, it is possible to minimize the reduction in the external size of solid objects such as rocks that can be scooped up by the bucket. Therefore, according to the third aspect of the present invention, it is possible to improve the durability of the soil and sand adhesion prevention equipment while minimizing the reduction in the original convenience of the bucket.

[0022] According to the fourth aspect of the present invention, it is possible to minimize damage or breakage to one end of the earth pressure relief body caused by repeated application of load due to earth pressure to this portion. Therefore, the durability of the soil and sand adhesion prevention device can be further improved.

[0023] According to the fifth aspect of the present invention, the earth pressure mitigating body can be attached and used only when highly viscous soil or sand is to be excavated or scooped. Therefore, it is possible to more reliably prevent the storage space inside the bucket from being substantially reduced by installing the earth pressure relief body.

[0024] According to the sixth aspect of the present invention, the manufacturing cost of the soil and sand adhesion prevention device can be reduced. Furthermore, according to the sixth aspect of the present invention, when the earth and sand adhesion prevention device is configured to be detachable from the bucket, the labor required for the worker to attach and detach the earth and sand adhesion prevention device can be significantly reduced. Therefore, according to the sixth aspect of the present invention, it is possible to provide a device for preventing soil and sand adhesion that is extremely easy to handle. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a view of a bucket equipped with a soil adhesion prevention device according to an embodiment of the present invention, viewed from the opening side. [Figure 2] 1 is a cross-sectional view of the vicinity of the attachment means in the soil adhesion prevention device according to the present embodiment. [Figure 3] 1 is a side view showing a state in which a bucket equipped with a soil adhesion prevention device according to the present embodiment is in use. FIG. [Figure 4] 10 is an image of a bucket equipped with a soil adhesion prevention device according to this embodiment after use. [Figure 5] FIG. 10 is a view of a bucket equipped with a soil adhesion prevention device according to a modified example, viewed from the opening side. DETAILED DESCRIPTION OF THE INVENTION

[0026] A device for preventing sediment adhesion according to an embodiment of the present invention will be described in detail with reference to Figures 1 to 5. Note that the following description of the preferred embodiment is essentially merely an example.

[0027] Prior to describing the present invention, an outline of a bucket to which the soil adhesion prevention device according to the present invention is attached will be described with reference to FIG. A bucket 50 to which the soil adhesion prevention device according to the present invention is attached is used by being attached to the tip of an operating arm of a heavy machine for excavation or ground leveling, such as a hydraulic excavator, as shown in Fig. 1. In this embodiment, the bucket 50 of a hydraulic excavator will be described. As shown in FIG. 1, for example, bucket 50 of a hydraulic excavator includes bucket body 51, which is a hollow container made of metal such as steel and has a quadrilateral opening 520, and bracket 55, which is used to attach bucket 50 to the tip of the arm of a heavy machine, is provided on upper edge 52a side when opening 520 is oriented horizontally.

[0028] If necessary, the bucket 50 may have a desired number of claws 56 protruding from the lower edge 52b of the opening periphery 52, and may be provided with side cutters 57, which are bent bodies of metal plate such as steel, on each of the right edge 52c and left edge 52d of the opening periphery 52. In the bucket 50 shown in FIG. 1, a pair of drain holes 58 are formed in the hatched bottom 54 so as to penetrate the bucket body 51 in the thickness direction.

[0029] In this embodiment, the opening periphery 52 of the bucket 50 is described as having an approximately rectangular shape as an example, but the opening periphery 52 may have any other desired shape, such as a square, a trapezoid, or a rectangle with notched corners. Although the bucket 50 shown in FIG. 1 has a curved bottom 54, the bottom 54 may be flat.

[0030] [1; Basic configuration of the present invention] The basic configuration of a soil adhesion prevention device according to an embodiment of the present invention (hereinafter referred to as this embodiment) will be described with reference to FIGS. 1 to 3. FIG. The soil adhesion prevention device 1A of this embodiment, as shown in Figure 1, is equipped with an earth pressure relief body 2 consisting of a metal chain, for example made of steel, that is stretched across the inner space 53 of the bucket 50 but does not come into contact with the inner surface 59 of the bucket 50, and mounting means 3a and 3b that mount the upper end 2a and lower end 2b of the earth pressure relief body 2 to the inner surface 59 of the bucket 50, respectively.

[0031] As shown in Figure 1, when the opening 520 of the bucket 50 is arranged horizontally and the bracket 55 is arranged vertically upward, and the bucket 50 is viewed from the opening 520 side, the upper end 2a of the earth pressure relief body 2 is arranged on the inner surface 59 near the upper right corner 60a of the opening peripheral portion 52 and near the opening peripheral portion 52, while the lower end 2b is arranged on the inner surface 59 of the lower left corner 61b, which is diagonally opposite the upper right corner 60a, and near the bottom 54.

[0032] As shown in FIG. 1, in the inner space 53 of the bucket 50, the earth pressure absorbing body 2 is suspended in a relaxed state between the attachment means 3a, 3b. In other words, the center line of the earth pressure absorbing body 2 that is suspended across the inner space 53 of the bucket 50 is curved.

[0033] Both mounting means 3a, 3b have the same structure, and as shown in FIG. 2, for example, are composed of a fixing hole 51a formed by penetrating through the thickness of bucket body 51, a male member 4 inserted into this fixing hole 51a, and a female member 5 which has a retaining structure attached to the male member 4 protruding from fixing hole 51a.

[0034] More specifically, the male member 4 has a threaded rod portion 4a made of, for example, metal, a flange portion 4c provided at the end of the threaded rod portion 4a and serving as a retaining position when the threaded rod portion 4a is inserted into the fixing hole 51a, and a ring-shaped operating portion 4b protruding from the surface of the flange portion 4c on the side on which the threaded rod portion 4a does not protrude. Note that if the male member 4 does not have the flange portion 4c, the operating portion 4b will serve as a retaining position when the threaded rod portion 4a is inserted into the fixing hole 51a.

[0035] The female member 5 has a long nut portion 5a that is screwed onto the threaded rod portion 4a that protrudes from the fixing hole 51a toward the inner space 53 of the bucket 50 when the threaded rod portion 4a that constitutes the male member 4 is inserted into the fixing hole 51a, and an annular portion 5c that is provided on the outer surface 5b of the long nut portion 5a, more specifically, on the end face of the long nut portion 5a.

[0036] The procedure for attaching the attachment means 3a, 3b to the bucket body 51 is as follows. Prior to attaching the mounting means 3a and 3b, fixing holes 51a are formed in desired positions of the bucket body 51 using a drill or the like. These fixing holes 51a can be reused when attaching the earth pressure alleviators 2. The diameter of the fixing holes 51a is set to a size that does not affect the strength of the bucket 50.

[0037] Next, the threaded rod portion 4a of the male member 4 is inserted into the fixing hole 51a from the outside of the bucket body 51 toward the inner space 53. Thereafter, the long nut portion 5a of the female member 5 is screwed onto the end of the threaded rod portion 4a that protrudes into the inner space 53 of the bucket body 51 from the fixing hole 51a. This allows an annular portion 5c to be provided on the inner surface 59 of the bucket 50, which connects the upper end 2a or the lower end 2b of the earth pressure alleviating body 2.

[0038] After this, the desired ring that constitutes the earth pressure relief body 2, or an attachment ring that is arranged on the upper end 2a or lower end 2b side of the earth pressure relief body 2, can be connected to the annular portion 5c attached to the inner surface 59 of the bucket 50 using a connecting device 6 such as a shackle, thereby suspending the earth pressure relief body 2 across the inner space 53 of the bucket 50.

[0039] In the soil and sand adhesion prevention device 1A of this embodiment, the combination of the annular portion 5c that constitutes the mounting means 3a, 3b, the ring that constitutes the earth pressure relief body 2 or the ring that is provided on the earth pressure relief body 2, and the connecting device 6 such as a shackle that connects them together forms the connecting structure between the earth pressure relief body 2 and the mounting means 3a or the mounting means 3b, and the earth pressure relief body 2 swings around this connecting structure as a fulcrum.

[0040] In the inner space 53 of the bucket 50, the inner surface 59 of the bucket 50 and the earth pressure absorbing body 2 are spaced apart by a maximum distance H as shown in FIG.

[0041] [2; How to use the present invention] A method of using the earth and sand adhesion prevention device 1A according to this embodiment will be described with reference to FIG. A bucket 50 equipped with the soil adhesion prevention device 1A according to this embodiment is attached to the tip of an arm 64 of a heavy machine 62 via a bracket 55, and by operating hydraulic cylinders 65 to 67, the boom 63 and arm 64 are operated to excavate or scoop up soil 70 with the bucket 50 attached to the tip of the arm 64, and then the bucket 50 is inverted at the desired location to discharge the soil 70.

[0042] [3; Effects of the present invention] The effects of the earth and sand adhesion prevention device 1A according to this embodiment will be described with reference to FIGS. When the bucket 50 is used to excavate or scoop up soil 70, the soil 70 enters from the opening 520 of the bucket 50 toward the bottom 54. Because there is a maximum distance H between the inner surface 59 of the bucket 50 and the earth pressure relief body 2, the soil 70 that enters the inner space 53 of the bucket 50 reaches and comes into contact with the earth pressure relief body 2 before reaching the bottom 54 of the bucket 50. At this time, the earth pressure of the soil 70 is dispersed and relieved by the earth pressure relief body 2, and the soil 70 in this state reaches the bottom 54 of the bucket 50. As a result, the soil 70 can be prevented from adhering to the bottom 54 of the bucket 50 as much as possible.

[0043] Therefore, when the opening 520 of the bucket 50 containing the soil 70 is inverted to discharge the soil 70 from the bucket 50, the soil 70 on the bottom 54 side of the bucket 50 can be discharged smoothly. Therefore, by attaching the soil adhesion prevention device 1A of this embodiment to the inner space 53 of the bucket 50, it is possible to minimize the adhesion of soil 70 to the bottom 54 of the bucket 50 when the bucket 50 is repeatedly used to dig or scoop up soil 70 and then inverted to discharge the soil 70 contained in the bucket 50.

[0044] Figure 4 shows an image of the inside of bucket 50 after using bucket 50 equipped with soil adhesion prevention equipment 1A of this embodiment to continuously repeat the operations of digging or scooping soil 70 and discharging the soil 70 contained in bucket 50. As shown in Figure 4, the bucket 50 equipped with the sediment adhesion prevention device 1A has some sediment 70 stuck around the opening periphery 52 and around the side cutter 57, but there is almost no sediment 70 stuck to the bottom 54 side of the bucket 50, and the presence of two drainage holes 58 can be confirmed.

[0045] Therefore, with the earth and sand adhesion prevention equipment 1A according to this embodiment, the cleaning work of the bucket 50 after use can be significantly reduced. In other words, by using the soil adhesion prevention equipment 1A according to this embodiment, a structure with excellent cleanability can be realized in the bucket 50. This can improve the maintainability of the bucket.

[0046] Furthermore, when the earth pressure relief body 2 of the soil adhesion prevention device 1A of this embodiment swings around the connecting structure of the mounting means 3a, 3b and the earth pressure relief body 2 as a fulcrum, the earth pressure relief body 2 swings irregularly due to contact with the soil 70 that has entered through the opening 520 of the bucket 50, thereby more effectively alleviating the earth pressure acting on the bottom 54 of the bucket 50. Furthermore, if the earth pressure relief body 2 is a metal chain, by hanging the earth pressure relief body 2 in a relaxed state within the bucket 50, any position in the center line direction of the earth pressure relief body 2 will deform irregularly, making it possible to more significantly exert the above-mentioned effect.

[0047] [4; Regarding variations and detailed structures of the present invention] (About earth pressure relief bodies) When a chain consisting of multiple metal rings connected in series is used as the earth pressure reliever 2, when connecting the earth pressure reliever 2 to the attachment means 3a, 3b via the connectors 6, the length of the earth pressure reliever 2 stretched between the attachment means 3a, 3b can be adjusted as desired by appropriately selecting the rings to which the connectors 6 are attached. In other words, the degree of relaxation of the earth pressure reliever 2 can be changed as desired. In this case, the earth and sand adhesion prevention device 1A according to this embodiment can be attached to another bucket 50 having a different outer size, thereby improving the versatility of the earth and sand adhesion prevention device 1A.

[0048] (Deformation of earth pressure relief bodies) A modified example of a tool 1B for preventing sediment adhesion will be described with reference to Fig. 5. Components common to the above-described tool 1A for preventing sediment adhesion will be assigned the same reference numerals and explanations thereof will be omitted, and only different components will be described below. The modified soil adhesion prevention device 1B is equipped with a rod-shaped earth pressure relief body 2', which is, for example, a solid or hollow metal tube body and has a curved center line, instead of the earth pressure relief body 2 which is a metal chain as shown in Figure 1 above.

[0049] Although the soil adhesion prevention device 1B cannot adjust the length of the soil pressure relief body 2', it can stably achieve the effect of minimizing the adhesion of soil 70 to the bottom 54 of the bucket 50, which is the objective of the present invention, just as when the soil pressure relief body 2 is used. The earth pressure alleviator 2' may also be a flexible wire rope made of twisted metal wires. In this case, too, the effect of minimizing adhesion of soil 70 to the bottom 54 of the bucket 50, which is the object of the present invention, can be stably achieved.

[0050] As shown in FIG. 5, the earth pressure absorbing body 2' is provided with rings 7 for attaching the connectors 6 at both the upper end 2a and the lower end 2b.

[0051] (Regarding the placement of earth pressure relief bodies) In this embodiment, an example is given in which the earth pressure relief body 2 is stretched from the inner surface 59 near the upper right corner 60a at the opening peripheral portion 52 of the bucket 50 to the inner surface 59 near the bottom 54 on the lower left corner 61b side, which is diagonally opposite the upper right corner 60a, but the position at which the earth pressure relief body 2 is stretched may be other than the above. For example, as shown in Figure 1, when the bucket 50 is viewed from the opening 520 side with the bracket 55 positioned vertically upward, the soil adhesion prevention device 1A may be attached so as to be symmetrical with respect to the center line C extending vertically.

[0052] Alternatively, in addition to the above, when the bucket 50 is viewed from the opening 520 side with the bracket 55 positioned vertically upward, the earth pressure relief body 2 may be placed across the hatched bottom 54 so that it passes vertically, horizontally, or diagonally. At this time, it is also preferable to attach one end of the earth pressure relief body 2 to the opening peripheral portion 52 of the bucket 50 or to the inner surface 59 near the opening peripheral portion 52, while attaching the other end of the earth pressure relief body 2 to the inner surface 59 near the bottom 54 of the bucket 50. In this case, when the opening 520 of the bucket 50 is directed vertically upward, the shape of the center line of the earth pressure relief body 2 suspended in the inner space 53 of the bucket 50 can be made to follow the shape of the inner surface 59 of the bucket 50 as closely as possible, while providing a sufficient gap H (see Figure 3) between the inner surface 59 of the bucket 50 and the earth pressure relief body 2.

[0053] As a result, the effective storage space of the bucket 50 can be prevented from becoming smaller as much as possible due to the attachment of the soil adhesion prevention device 1A inside the bucket 50. In other words, even when the soil adhesion prevention device 1A is attached inside the bucket 50, solid objects such as rocks of a certain size can still be stored inside the bucket 50 without any problems, so the convenience of the bucket 50 can be prevented from being reduced as much as possible.

[0054] In this embodiment, an example is given in which one end of the earth pressure relief body 2 is attached to the inner surface 59 near the opening periphery 52 of the bucket 50, and the other end is attached to the inner surface 59 near the bottom 54 of the bucket 50, but the attachment position of the other end may also be on the inner surface 59 near the opening periphery 52 of the bucket 50. In this case, although it is necessary to set the length of the earth pressure relief body 2 longer, the effect of preventing soil 70 from adhering to the bottom 54 of the bucket 50 as much as possible can be achieved, similar to when the other attachment position of the end of the earth pressure relief body 2 is closer to the bottom 54 of the bucket 50.

[0055] Even if the other end of the earth pressure absorbing body 2 is disposed at the bottom 54 of the bucket 50 rather than closer to the bottom 54, the unique effect of the present invention is still exhibited. The reason for this is that the further away from the earth pressure relief body 2, the weaker the earth pressure relief effect of the earth pressure relief body 2 becomes, and the risk of soil 70 adhering to the inner surface 59 of the bucket 50 increases relatively, but this does not mean that the earth pressure relief effect of the earth pressure relief body 2 is not completely eliminated. In other words, when an earth pressure relief body 2 is hung across the inner space 53 of the bucket 50 and viewed from the opening 520 side of the bucket 50, the longer the length of the earth pressure relief body 2 passing through the bottom 54 of the bucket 50, the greater the effect of preventing soil 70 from adhering to the bottom 54 of the bucket 50. Therefore, when suspending only one earth pressure absorbing body 2 in the inner space 53 of the bucket 50, it is advisable to suspend the earth pressure absorbing body 2 so that it passes diagonally across the bottom 54 of the bucket 50 when the bottom 54 is viewed from the opening 520 of the bucket 50 (see Figures 1 and 5).

[0056] The number of earth pressure relief bodies 2 suspended in the inner space 53 of the bucket 50 may be two or more, but as shown in Figure 4 above, simply installing one earth pressure relief body 2 is sufficient to prevent the soil 70 from adhering. However, if the width of the bucket 50 in the horizontal direction is large, it is effective to bridge a plurality of earth pressure absorbing bodies 2 across the inner space 53 of the bucket 50 .

[0057] Furthermore, when the earth pressure relief body 2 is hung across the interior space 53 of the bucket 50, even if one of the ends of the earth pressure relief body 2 is placed on the lower edge 52b of the opening periphery 52 of the bucket 50 or on the inner surface 59 near the lower edge 52b, the soil adhesion prevention device 1A will still achieve the intended effect, but there is a concern that the risk of damage or breakage of the mounting means 3a or the mounting means 3b will increase due to the earth pressure when the bucket 50 is used to excavate highly viscous soil 70 or soil 70 containing rocks. Therefore, when placing one of the ends of the earth pressure relief body 2 on or near the opening peripheral edge 52 of the bucket 50, it is advisable to select either the upper edge 52a, the right edge 52c or the left edge 52d of the opening peripheral edge 52.

[0058] (About the connection structure) In this embodiment, the connection structure between the mounting means 3a, 3b and the earth pressure relief body 2 or earth pressure relief body 2' is described as an example in which a combination of a ring-shaped portion 5c constituting the mounting means 3a, 3b, a ring body constituting the earth pressure relief body 2 or a ring body 7 arranged at the end of the earth pressure relief body 2', and a connecting device 6 such as a shackle that connects these together is used, but in addition to the above, the connection structure can also use conventionally known universal joints, ball joints, etc. Furthermore, even when a conventionally known universal joint, ball joint, or the like is used as the connecting structure, the earth pressure relief body 2 or earth pressure relief body 2' can be swung within the bucket 50 using the connecting structure as a fulcrum, thereby more reliably preventing soil 70 from adhering to the bottom 54 of the bucket 50 using the soil adhesion prevention device 1A or soil adhesion prevention device 1B.

[0059] Furthermore, the connecting structure may have a certain length in the direction of the center line of the earth pressure relief body 2 or the earth pressure relief body 2'. More specifically, the connecting structure itself may be a chain body, or may be a crank-shaped connecting structure in which a plurality of conventionally known universal joints or the like are connected by a rod body. When the connecting structure has the above-described form, even if the center line of the earth pressure relief body 2' is straight, the earth pressure relief body 2' can be swung within the bucket 50, thereby achieving the effect of more reliably alleviating the earth pressure entering the bucket 50.

[0060] (About mounting means) In this embodiment, the case where the attachment means 3a, 3b having the structure shown in FIG. 2 are detachably attached to the bucket body 51 has been described as an example. In this case, when using the bucket 50 to excavate the riverbed or scoop up sediment accumulated in a waterway, removing the sediment adhesion prevention device 1A from the bucket 50 can prevent vegetation growing in the river or waterway from becoming entangled in the soil pressure relief body 2 and interfering with the work.

[0061] On the other hand, a member corresponding to the annular portion 5c of the mounting means 3a, 3b may be fixed to the inner surface 59 or opening periphery 52 of the bucket 50 by welding or the like and used as the mounting means 3a, 3b. In this case, when the soil adhesion prevention device 1A according to this embodiment is permanently attached to the bucket 50, it is possible to prevent the attachment means from being unintentionally detached from the bucket 50.

[0062] The attachment means 3a and 3b according to this embodiment can be used without any problem even if the portion disposed in the inner space 53 of the bucket 50 and the portion disposed on the outside of the bucket 50 are interchanged.

[0063] The attachment means 3a, 3b may have a structure other than that shown in FIG. More specifically, the earth pressure relief body 2 is fixed to the fixing hole 51a formed in the bucket body 51 using a bolt (not shown) that can be inserted into the hollow portion of the ring that constitutes the earth pressure relief body 2, which is, for example, a chain, but has a head that cannot pass through the hollow portion, and a wing nut or nut etc. can be attached to the tip side of the bolt that protrudes from the fixing hole 51a onto the outer surface of the bucket 50 to prevent it from coming loose. In this case, the combination of the rings constituting the earth pressure relief body 2, which is a chain, and the bolts forms the connecting structure.

[0064] Alternatively, at the end of the bolt on the side not having the head, a through hole may be formed in the threaded rod portion 4a protruding from the fixing hole 51a in a direction intersecting the axial direction of the bolt, and a latch-shaped member may be inserted into this through hole to serve as a position to prevent the bolt from coming loose. Alternatively, without forming fixing holes 51a in bucket body 51, the end of the bolt not having the head may be fixed to opening periphery 52 or inner surface 59 of bucket 50 by welding or the like. In either case, a structure for attaching the earth pressure mitigating body 2 or the earth pressure mitigating body 2' in a swingable manner can be provided inside the bucket 50.

[0065] (others) In this embodiment, an example is given in which the earth pressure relief body 2 is attached to the inside of the bucket 50 using the attachment means 3a, 3b and the connecting device 6, but if the earth pressure relief body 2 is a solid or hollow rod, a flat attachment member (not shown) may be attached to the end of the earth pressure relief body 2, and this attachment member may be fixed directly to the inner surface 59 of the bucket 50 using welding or fasteners consisting of bolts and nuts. Alternatively, the earth pressure relief body 2' may be made of a wood-based material with sufficient strength, and its end shape may be processed to fit into the inner space 53 of the bucket 50, and the earth pressure relief body 2' may be fitted and attached inside the bucket 50. In either case, the earth pressure absorbing body 2 does not oscillate, and therefore the effect of absorbing earth pressure is somewhat reduced, but the object of the present invention can be achieved without any disadvantage. [Industrial Applicability]

[0066] As described above, the present invention is a soil adhesion prevention device that can prevent soil from adhering to the inside of the bucket of heavy machinery for excavation or ground leveling, and can be used in technical fields related to excavation machines and ground leveling machines. [Explanation of symbols]

[0067] 1A, 1B...Sediment adhesion prevention device 2, 2'...Soil pressure relief body 2a...Upper end 2b...Lower end 3a, 3b...Attachment means 4...Male member 4a...Threaded rod portion 4b...Operating portion 4c...Flange portion 5...Female member 5a...Long nut portion 5b...Outer surface 5c...Annular portion 6...Connector 7...Annular body 50...Bucket 51...Bucket body 51a...Fixing hole 520...Opening 52...Opening periphery 52a...Upper edge 52b...Lower edge 52c...Right edge 52d...Left edge 53...Inner space 54...Bottom 55...Bracket 56...Claw 57...Side cutter 58...Drain hole 59...Inner surface 60a...Upper right corner 60b...Upper left corner 61a...Lower right corner 61b...Lower left corner 62...Heavy equipment (hydraulic excavator) 63...Boom 64...Arm 65-67...Hydraulic cylinder 68...Swing link member 69...Connecting link member 70...Soil and sand

Claims

1. A soil adhesion prevention device attached to the inside of a bucket of a heavy machine for excavation or ground leveling, a rod-shaped or cord-shaped earth pressure absorbing body that is spanned across the inner space of the bucket and does not come into contact with the inner surface of the bucket; When the bucket is viewed from the opening side with the bracket of the bucket positioned vertically upward, one end of the earth pressure mitigating body is positioned on an upper corner on the upper edge side of the opening periphery of the bucket or on the inner surface near the upper corner, while the other end is positioned near the bottom of the bucket, A soil adhesion prevention device characterized in that there is a gap between the earth pressure absorbing body and the inner surface of the bucket.

2. an attachment means for attaching an end of the earth pressure relief body to the opening periphery or the inner surface of the bucket; 2. The soil adhesion prevention device according to claim 1, wherein the earth pressure absorbing body is swingable around a connecting structure that connects the mounting means and the earth pressure absorbing body as a fulcrum.

3. The attachment means a fixing hole formed through the bucket in a thickness direction; an insertion portion that is inserted into the fixing hole; The soil adhesion prevention device according to claim 2, further comprising a retaining portion attached to the insertion portion projecting from the fixing hole.

4. 3. The soil adhesion prevention device according to claim 1, wherein the soil pressure relief member is only one.

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