JP2005171653A - Ground agitating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ground agitating device smoothly insertable into the ground, while arranging agitating bodies on both sides of a support. <P>SOLUTION: This ground agitating device has the support 1 inserted into the ground G, and the agitating bodies 4A and 4B rotating with the horizontal direction arranged on both sides of this support 1 as the axes 2 and 3. The ground agitating device has an excavating bit 83 projecting downward from a lower end surface of the support 1 and rotating with this projecting direction as the axis. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ground stirring device. In particular, the present invention relates to a ground agitation apparatus suitable for improving the ground located in a shallow layer.

  Conventionally, as this kind of ground agitation (improvement) device, there is known an apparatus M ′ in which a rotating stirring member 104 is rotatably attached to a support 101 as shown in FIG. The construction using the ground stirring device M ′ is performed by dropping the ground stirring device M ′ from the tip of the boom Xb of the self-propelled vehicle X and lowering the boom Xb while rotating the stirring body 104. M ′ is inserted into the ground G, and the boom Xb is drawn toward the vehicle while injecting an improvement material such as a grout material, whereby the ground G and the improvement material are agitated and mixed to improve a predetermined region of the ground G.

  Moreover, as a form regarding the conventional stirring body 104, in order to protect the transmission means etc. which transmit a driving force to the stirring body 104 from earth and sand etc., the support body 101 was made into the box shape, and the transmission means was arranged in the inside. For example, a configuration in which the stirring body 104 is obliquely attached to the support body 101 (for example, in order to prevent an unmodified area from being generated between the left and right stirring bodies 104, for example) Patent Document 2).

However, according to the former form, between the left and right stirring bodies 104, that is, the lower end portion of the support body 101 serves as a resistance to the ground G, the ground stirring device M ′ cannot be smoothly inserted into the ground G. In addition, even with the latter form, the stirring body 104 attached obliquely becomes resistance to the ground G, and therefore the ground stirring device M ′ cannot be smoothly inserted into the ground G. In this regard, if the stirring body 104 is attached to the lower end portion of the support 101 (the form described in Patent Document 1 as a conventional example), insertion into the ground G is facilitated, but the transmission means and the like are protected from earth and sand. In this respect, it can be said that a configuration such as Patent Document 1 or Patent Document 2 in which stirring bodies are provided on both sides of the support 101 is preferable.
Japanese Utility Model No. 6-1622 Japanese Patent Laid-Open No. 10-227028

  A main problem to be solved by the present invention is to provide a ground stirring device that can be smoothly inserted into the ground while stirring bodies are provided on both sides of the support.

The present invention that has solved the above problems is as follows.
[Invention of Claim 1]
A ground agitating device comprising: a support inserted into the ground; and a stirring body that rotates around the horizontal direction provided on both sides of the support,
A ground agitation device comprising at least one excavating bit that protrudes downward from a lower end surface of the support and rotates about the protruding direction.

[Invention of Claim 2]
The ground stirrer according to claim 1, wherein the stirrer is provided at at least two different positions in the vertical direction.

[Invention of Claim 3]
A stirrer is provided on both sides of the lower end of the support, and a disk that rotates around the rotation axis is attached to the part of the stirrer that is housed in the support with the rotation axis of the stirrer. In addition, unevenness is provided over the entire circumference along the periphery, and the receiving unevenness that meshes with the unevenness is provided over the circumference of the portion of the excavation bit that is housed in the support body. The ground stirring device according to claim 2.

  Although the ground stirring apparatus of the present invention is provided with stirring bodies on both sides of the support, it can be smoothly inserted into the ground.

Embodiments of the present invention will be described below.
[Outline]
The present invention is a ground agitation device provided with a support body inserted into the ground and a stirring body that rotates around the horizontal direction provided on both sides of the support body, from the lower end surface of the support body At least one excavating bit that protrudes downward and rotates around the protruding direction is provided.
Therefore, in the following, first, the support and the stirring body (basic configuration) will be described, and then the excavation bit (characteristic configuration) which is a characteristic part of the present invention will be described.

[Basic configuration: first embodiment]
The ground stirring apparatus of this form is shown in FIGS. In the ground stirring device of the present embodiment, the lower stirring bodies 4A and 4B are disposed on both sides of the front end (lower end) of the vertically long support 1, and the upper stirring bodies 5A and 5B are disposed on the upper side, respectively. Is connected to the support 1 via the rotary shafts 2 and 3. The structure of each stirring body 4A, 4B, 5A, 5B is the same on the left and right.

  The inside of the support body 1 is a space, and the driving force of the hydraulic motor 6A serving as a drive source for the stirring bodies 4A, 4B, 5A, 5B is passed through the rotating shafts 2 and 3 in this space. , 5A, 5B, transmission means 63, 23 for transmitting to the improvement material conveying means H are arranged. In addition, this space is liquid-tight so as to prevent dirt and sand from entering the space for protection of the transmission means 63, 23 and the like.

  A hydraulic motor 6A serving as a drive source for the agitators 4A, 4B, 5A, and 5B is disposed on the support 1, and a drive shaft (not shown) projects into the space inside the support 1. A drive sprocket (not shown) is fitted on the drive shaft. Control of the rotational speed of the hydraulic motor 6A and supply of hydraulic pressure are operated from the outside via an oil feeding path 66 and a control path 67.

  On the other hand, the rotary shafts 2 and 3 are respectively provided so as to penetrate the support 1 from the side so as to be substantially parallel (horizontal) to the ground G surface during stirring. Sprockets 2Sb, 3Sa, 3Sb are fitted to the portions of the rotary shafts 2, 3 located inside the support, and endless chains 63, 23 serving as transmission means to these sprockets 2Sb, 3Sa, 3Sb and a driving sprocket (not shown) are provided. The driving force of the hydraulic motor 6A is transmitted to the rotary shafts 2 and 3. Further, in the portions of the rotary shafts 2 and 3 exposed to the outside of the support 1, the stirrer mounting bases 2 a, 2 a ′, 2 b, 2 b ′, 3a, 3a ', 3b, 3b' are installed flatly. Stirring bodies 4A, 4B, 5A, 5B are attached to the stirring body mounting bases 2a, 2a ', 2b, 2b', 3a, 3a ', 3b, 3b'.

  Stirrer mounting bases 2a, 2a ′, 2b, 2b ′, 3a, 3a ′, 3b, and 3b ′ have stirrers 4A, 4B, 5A, and 5B, respectively. The substantially cross-shaped substrates 40c, 40d, 50c, 50d that are flat-contacted and bolted to each of ', 3a, 3a', 3b, 3b 'and the tips of the convex portions of the substrates 40c, 40d, 50c, 50d that are installed flat The stirring claw mounting pedestals 40e, 50e... Bridged in between and a plurality of stirring claws 40f, 50f... Projecting in a direction orthogonal to the rotation direction of the stirring claw mounting bases 40e, 50e. In the illustrated example, the stirring claws 40f, 50f... Are disposed at an angle (obliquely) with respect to the advancing (rotating) direction of the stirring claw mounting bases 40e, 50e.

  The substrates 40c, 40d, 50c, and 50d are not limited to a substantially cross shape, and can be configured in various shapes. For example, a disk shape may be used. Moreover, the shape of the stirring claws 40f, 50f... Can be determined as appropriate. The stirring members 4A, 4B, 5A, 5B have a wide stirring range because the stirring claws 40f, 50f... For mainly stirring the ground G are at a distance away from the rotating shafts 2, 3, and the rotating shafts 2, 3 And the stirrer mounting bases 40e, 50e... Have a merit that the rotational resistance is small.

  Furthermore, the stirrers 4A, 4B, 5A, 5B of the present embodiment can be divided, and the lower stirrer 4A located on the right side with respect to the front view of the support 1 will be described as an example with reference to FIG. As described above, the substrate 40c is composed of a plurality of unit stirring blade bodies (40c, 40c...) That are detachable from the stirring body mounting bases 2a, 2a ′. ) Is fixed to the stirring body mounting bases 2a, 2a ′ of the rotating shaft 2 by bolt holes Bh and bolts (not shown) screwed into the bolt holes Bh, so that one stirring body 4A is formed. Each illustrated example is composed of two unit agitating blade bodies (divided members), but the agitating body is composed of one, three, four, five or more unit agitating blade bodies. You can also. By making the stirring bodies 4A, 4B, 5A, and 5B separable, it is easy to transport to the site, the ground stirring device can be assembled easily and quickly, and the construction time can be shortened. is there.

  On the other hand, as shown in FIG. 3, the inside of the support 1 is an endless chain between a drive sprocket (not shown) fitted to a drive shaft (not shown) of the hydraulic motor 6A and a first sprocket 3Sa fitted to the upper rotary shaft 3. 63, and the second endless chain 23 is hung on the second sprocket 3Sb provided separately from the first sprocket 3Sa of the upper rotating shaft 3 and the third sprocket 2Sb fitted on the lower rotating shaft 2. When a drive shaft (not shown) is rotated by applying hydraulic pressure to the hydraulic motor 6A via the hydraulic transmission path 66, the driving force is transmitted to the sprockets 3Sa, 3sb, 2Sb by the endless chains 63, 23 to rotate the rotation shaft. 2 and 3 rotate, and the stirring bodies 4A, 4B, 5A and 5B rotate around the rotation shafts 2 and 3.

  This ground stirring device is inserted into the ground while rotating the stirring bodies 4A, 4B, 5A, 5B. At the time of this insertion, in order to reduce the pushing resistance, the improving material may be jetted from the tip of the support 1. The improvement material injection means mainly includes a conveyance path H, a discharge port 71, and an improvement material supply device (not shown), and the discharge port 71 is directed vertically downward from the tip (lower end) of the support 1. Open. A conveyance path H is connected to the discharge port 71, and the conveyance path H is provided along the support 1 and is connected to a supply device above the support 1. In the illustrated example, the discharge port 71 is provided only at the tip of the support 1, but the improvement material discharge port may also be provided between the upper stirring members 5A and 5B and the lower stirring members 4A and 4B. . According to this, the stirring and mixing property of the improved material and soil is further increased.

[Basic configuration: second embodiment]
The ground stirring apparatus of this embodiment is shown in FIGS. As in the first embodiment, the present ground stirring device has lower stirring bodies 4A and 4B disposed on both sides of the tip of the support 1, and upper stirring bodies 5A and 5B are disposed on the upper side. . Each of the lower stirring bodies 4A and 4B and the upper stirring bodies 5A and 5B is connected to the support body 1 through the rotation shafts 2 and 3, and the configuration of each of the stirring bodies 4A, 4B, 5A and 5B is supported. The same applies to the left and right sides of the body 1. The inside of the support 1 is a space that is liquid-tight with the outside, and transmission means for transmitting the driving force of the hydraulic motor 6 </ b> A to the rotating shaft is disposed in this space. The improvement material transport means H is arranged along the vertical direction on the outer side of the support 1 and on the front and back surfaces of the support 1. Discharge ports 71B and 71B opening downward are provided at the lower end.

  The hydraulic motor 6A serving as a drive source for the agitators 4A, 4B, 5A, 5B is disposed on the upper portion of the support 1 and its drive shaft projects into the internal space of the support 1 (not shown). A drive sprocket (not shown) is fitted on the shaft. Control of the rotation speed of the hydraulic motor 6A and supply of hydraulic pressure are operated from the outside via an oil feed path 66 and a control path 67.

  The rotary shafts 2 and 3 are respectively provided so as to penetrate the support 1 from the side so as to be substantially parallel (horizontal) to the surface of the ground G during stirring. Sprockets are fitted to the parts of the rotary shafts 2 and 3 located inside the support 1, and endless chains serving as transmission means are hung on these sprockets and the drive sprockets, so that the driving force of the hydraulic motor 6A is applied to the rotary shafts. 2 and 3. Although not shown separately, the driving force transmission mode of the rotary shafts 2 and 3 by the endless chain inside the support body 1 has the same configuration as the first mode shown in FIG.

  Disc-shaped stirrer mounting bases 2a, 2b, 3a, 3b are fitted to the tips of the portions of the rotary shafts 2, 3 exposed to the outside of the support 1, and the stirrer mounting bases 2a, 2b, 3a, Stirring bodies 4A, 4B, 5A, 5B are attached to 3b. The stirring bodies 4A, 4B, 5A, 5B are each composed of three unit stirring blade bodies 40c, 50c,..., And each of the unit stirring blade bodies 40c, 50c,. It is attached to 3b with bolts B, B. The unit agitating blade bodies 40c, 50c,... Are agitated to attach the board portions (40c, 50c,...) That are bolted to the agitator mounting bases 2a, 2b, 3a, 3b and the stirring claws 40f, 40f,. Claw mounting bases 40e, 50e, and so on. In the illustrated example, the stirring claws 40f, 40e ... are provided on the stirring claws mounting bases 40e, 40e ... of the lower stirring bodies 4A, 4B, and the stirring claws 50e, 50e ... of the upper stirring bodies 5A, 5B are provided with stirring claws. Is not provided. The upper stirring bodies 5A and 5B are configured to obtain a stirring effect by the stirring claw mounting bases 50e, 50e. Of course, stirring claws may also be attached to the stirring claw mounting bases 50e, 50e... Of the upper stirring bodies 5A, 5B.

  Further, in the illustrated example, auxiliary stirring protrusions T, T,... For increasing the stirring ability in this region are provided between the stirring body mounting bases 2a, 2b, 3a, 3b and the side portions of the support body 1. 1 is provided so as to protrude from the side of 1 toward the stirrer mounting bases 2a, 2b, 3a, 3b.

  In this embodiment, the length L1 of the stirring claw mounting bases 40e, 40e ... of the lower stirring bodies 4A, 4B is more horizontal than the length L2 of the stirring claw mounting bases 50e, 50e ... of the upper stirring bodies 5A, 5B. The lengths of the stirring bodies 4A, 4B, 5A, 5B are extended over the length L3, L4. In the illustrated example, the outer edges (supports) of the stirring body mounting bases 2a, 2b, 3a, 3b from the side surface of the support body 1 are shown. The distance to the far edge from the body is longer in the lower stirring bodies 4A and 4B than in the upper stirring bodies 5A and 5B. That is, L1> L2 and L3> L4 are formed. Further, the distances L5 and L6 from the central axes of the rotary shafts 2 and 3 to the stirring claw mounting bases 40e, 50e,... Are longer in the lower stirring bodies 4A and 4B than in the upper stirring bodies 5A and 5B. That is, L6> L5. By taking these configurations, the region stirred by the lower stirring bodies 4A, 4B is wider than the stirring region by the upper stirring bodies 5A, 5B, and when the stirring device is suspended and inserted into the ground G, The upper stirring bodies 5A and 5B will stir in the region stirred by the lower stirring bodies 4A and 4B. In order to make the overhanging length L3 of the lower stirring bodies 4A and 4B longer than the overhanging length L4 of the upper stirring bodies 5A and 5B, the protruding length of the rotary shafts 2 and 3 from the support body 1 and the stirring claw mounting base 40e, 50e... Can be designed according to the length.

[Basic configuration: third embodiment]
The ground stirring apparatus of this embodiment is shown in FIGS. This embodiment is an example in which the shapes of the stirring bodies 4A, 4B, 5A, and 5B in the stirring device of the first embodiment are changed. There are four unit agitating blade bodies Mu attached to each of the upper, lower, left and right stirring body mounting bases 2a, 2b, 3a, 3b. Four of these Mu, Mu,... Are attached to each of the stirring body mounting bases 2a, 2b, 3a, 3b to form stirring bodies 4A, 4B, 5A, 5B having a substantially cross shape in a side view.

  The unit agitating blade bodies Mu, Mu,... Are different in shape from the first form, and do not have a structure in which the substrate is laid flat on the outer side and the inner side. The unit agitating blade bodies Mu, Mu... Are formed as a single plate-like substrate portions 40c, 50c. The stirring claw mounting bases 40e, 50e,... Provided so as to be orthogonal to 40c, 50c,. When the stirrers 4A, 4B, 5A, and 5B are configured in this manner, the load caused by the substrate during rotation is reduced.

[Basic configuration: Fourth embodiment]
The ground stirring device of each embodiment is an example in which all the stirring bodies 4A, 4B, 5A, and 5B are driven by one hydraulic motor 6A. However, an upper stirring body and a lower stirring body are provided by providing a plurality of hydraulic motors. Can be driven separately. Examples thereof are shown in FIGS.

  9 and 10, hydraulic motors 6 </ b> A and 6 </ b> B are arranged on both the left and right sides of the upper portion of the support 1. These hydraulic motors 6A and 6B are provided with hydraulic paths 66A and 66B so that different hydraulic pressures are applied. On the other hand, in the support body 1, drive shafts (not shown) of the respective hydraulic motors 6 </ b> A and 6 </ b> B and drive sprockets fitted to the hydraulic motors 6 </ b> A and 6 </ b> B are provided at intervals so as not to interfere with each other.

  On the other hand, each rotating shaft 2, 3 is provided so as to penetrate the support 1 from the side so as to be substantially parallel (horizontally) to the surface of the ground G during stirring as in the first embodiment. The attachment of the stirring bodies 4A, 4B, 5A, 5B to the rotating shafts 2 and 3 is the same as in the first embodiment.

  In this embodiment, the upper sprocket 3Sa fitted to the upper rotary shaft 3 and the drive sprocket fitted to the drive shaft of the drive motor 6A are connected by the endless chain 62 and fitted to the lower rotary shaft 2. The lower sprocket 2Sb and the drive sprocket fitted to the drive shaft of the drive motor 6B are connected by an endless chain 23, and the upper rotary shaft 3 and the lower rotary shaft 2 are driven by separate motors. Has been. In the ground agitating device of this embodiment configured as described above, the driving force and the rotating direction of the agitating bodies 4A, 4B, 5A, 5B can be appropriately changed above and below the support body 1. In addition, by using a combination of various sprockets and a gear means for changing the rotation direction using a known technique, the adjacent stirring bodies are configured to rotate in the opposite direction in the direction along the longitudinal direction of the support 1. May be.

  In the above example, the stirrer is provided at two different positions in the vertical direction, but is not limited thereto, and may be provided at three, four, or more than two.

[Characteristic configuration]
The ground agitating device of the present invention is provided with at least one excavating bit that protrudes downward from the lower end surface of the support and rotates around the protruding direction. By providing the excavation bit, the problem that the lower end portion of the support becomes resistance to the ground G and the ground stirring device cannot be smoothly inserted into the ground G is solved. In addition, when the excavator bit is rotated when the agitator is agitated after the support is inserted, the excavation bit functions as an agitating blade, so that the ground between the agitators may not be improved. No longer occurs.

  If the excavation bit is an apparatus having a support body inserted into the ground and a stirring body that rotates about the horizontal direction provided on both sides of the support body, the resistance of the lower end of the support body The problem will occur, so all will be effective. Moreover, since the transmission means etc. can be stored in a support body, the apparatus of this form can also exhibit the effect that it is protected from earth and sand at the same time.

  However, as long as the stirrer is provided in at least two positions different from each other in the vertical direction as exemplified in the first to fourth configurations of the basic configuration, a greater effect is exhibited. Will do. This is because the device of this embodiment is provided with two or more stirring bodies in order to widen the stirring range particularly in the vertical direction, but in general, the ground tends to become harder depending on the depth. This is because a larger resistance is generated when the support is inserted in the apparatus of (1).

Although the attachment form of a drill bit is not specifically limited, the form shown in FIG.13 and FIG.14 is recommended. 13 and 14 exemplify the case where the basic configuration is attached to the second form.
In this embodiment, with respect to the rotating shaft 2 of the stirrers 4A and 4B provided on both sides of the lower end portion of the support 1, the rotating shaft 2 is used as a shaft at a portion stored in the support 1 A disk 81 to be rotated is attached. The side surface 81 </ b> A of the disk 81 is provided with unevenness 82 over the entire circumference, and the receiving unevenness 85 that meshes with the unevenness 82 is a portion of the portion of the excavation bit 83 stored in the support 1. It is provided around the circumference wall.

  In this embodiment, when the sprocket 2Sb is rotated by the transmission means 23, the rotating shaft 2 rotates, so that the disk 81 is also rotated. The unevenness 82 provided on the disk 81 and the receiving unevenness 85 are engaged with each other for excavation. Bit 83 will also rotate. Therefore, a drive source for newly driving the excavation bit 83 is not required, and the apparatus is remarkably simplified.

  In this embodiment, a total of three excavation bits 83 are provided, one that protrudes directly downward from the lower end surface of the support 1 and two that protrude obliquely downward. It is not intended to be limited. For example, a total of one or two, four, five, or more can be used. It may be determined appropriately according to the size of the support 1.

[Ground improvement method]
Next, the ground improvement method will be described with reference to FIG. First, as shown in (A), the ground agitating device M is attached to the tip of the boom Xb of the self-propelled vehicle X as a moving body through the attachment portion at the upper end of the support, and the ground agitating device M is suspended from the tip of the boom Xb. Let Thereafter, the boom Xb is moved to hold the ground stirring device M at a position far from the self-propelled vehicle. If it will be in this state, then, as shown in (B), while rotating the stirring body, the boom Xb is lowered and the ground stirring device M is pushed into the ground G and inserted. At this time, the excavation bit is rotated, and the improvement material is sprayed from the tip of the support as necessary. Thereby, indentation resistance is reduced. If a scale for depth confirmation is attached to the support, the accurate insertion depth of the ground agitating device M can be confirmed at the time of insertion.

  Next, as shown in (C), when the agitator is inserted into the ground G, the boom Xb is operated to draw it toward the self-propelled vehicle X while maintaining the vertical of the ground agitator M. In this process, the stirring body rotates and moves in the direction of the arrow in the figure while stirring the ground G, so that the ground stirring in a predetermined region is performed. During this stirring, the excavation bit may be rotated or stopped. However, if it is rotated, stirring below the support body is ensured.

  Next, when the ground agitating device M is pulled close to the self-propelled vehicle X, the boom agitator M is operated to pull the ground agitating device M upward, and the rotation of the agitator is stopped as necessary.

  The above operation is repeated to improve the ground G in a desired range.

  Here, in the case of the ground stirring device M that drives the left and right stirring bodies with separate hydraulic motors, the rotational force of the left and right stirring bodies is changed as necessary. For example, when one agitator hits a hard ground or stone when the support is inserted into the ground G or when the support is being pulled toward the vehicle side, a high rotational force is exerted on the agitator that is in contact with the agitator It is constructed to give In addition, in the case of the ground agitating device M configured so that the upper and lower stirring bodies can be rotated in the opposite direction, the construction is performed by appropriately rotating the stirring bodies in the opposite direction in consideration of the ground state and the degree of stirring. It can be performed.

  In addition, although the example which attached the support body to the boom of the self-propelled vehicle was shown in this construction example, of course, it is also possible to attach the support body to a moving body other than the boom of the self-propelled vehicle.

It is a front view of the ground stirring apparatus of the 1st basic form. It is a side view of the ground stirring apparatus of the 1st basic form. It is a partial sectional view of the ground stirring device of the 1st basic form. It is a figure which shows the division | segmentation form of the stirring body of the ground stirring apparatus of a 1st basic form. It is a front view of the ground stirring apparatus of the 2nd basic form. It is a side view of the ground stirring apparatus of the 2nd basic form. It is a front view of the ground stirring apparatus of the 3rd basic form. It is a side view of the ground stirring apparatus of the 3rd basic form. It is a front view of the ground stirring apparatus of the 4th basic form. It is a partial cross section figure of the ground stirring device of the 4th basic form. It is the schematic which shows a ground improvement construction method. It is a figure which shows the conventional ground stirring apparatus. It is sectional drawing which shows the attachment form of a drill bit. It is CC line arrow line view of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Support body, 2, 3 ... Rotating shaft, 4A, 4B, 5A, 5B ... Stirring body, 81 ... Disc, 82 ... Uneven part, 83 ... Excavation bit, 84 ... Receiving uneven part, G ... Ground.

Claims (3)

A ground agitating device comprising: a support inserted into the ground; and a stirring body that rotates around the horizontal direction provided on both sides of the support,
A ground agitation device comprising at least one excavating bit that protrudes downward from a lower end surface of the support and rotates about the protruding direction.   The ground stirrer according to claim 1, wherein the stirrer is provided at at least two different positions in the vertical direction.   A stirrer is provided on both sides of the lower end of the support, and a disk that rotates around the rotation axis is attached to the part of the stirrer that is housed in the support with the rotation axis of the stirrer. In addition, unevenness is provided over the entire circumference along the periphery, and the receiving unevenness that meshes with the unevenness is provided over the circumference of the portion of the excavation bit that is housed in the support body. The ground stirring device according to claim 2.

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