JP2007162234A - Cab protecting structure and working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing structure capable of coping even with at least a deformation load from the rear of a cab. <P>SOLUTION: A window-frame reinforcing member 14c is fixed to the rear of the cab, and a stopper member 17 is fixedly provided in a state of protruding in the lateral direction of the side of a working device 13 from the member 14c. A retainer member 18 which is engaged with the stopper member 17 is fixedly provided in a state of protruding from the side of a machine body frame 12. In the stopper member 17 and the retainer member 18, lateral-displacement engagement surfaces 21 for regulating the lateral displacement of the cab are installed in a state of facing each other via a gap 22; downward-displacement engagement surfaces 23 for regulating the downward displacement of the cab are formed in a state of facing each other via a gap; and forward-displacement engaging surfaces 25 for regulating the forward displacement of the cab are formed in the state of facing each other via a gap 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cab protection structure and a work machine that improve cab strength.

  Conventionally used as a protective structure for the cab is a structure in which a guard is installed so as to cover the cab, but installing such a guard separately from the cab is costly and space-saving. (For example, refer to Patent Document 1).

Therefore, as a structure for preventing the deformation of the cab, a rectangular frame-shaped reinforcing member is integrally provided on the peripheral edge of the rear window of the cab, and on the other hand, the interference member welded to the airframe frame has a predetermined lower right corner portion of the reinforcing member. There is one in which an L-shaped stopper is installed through a gap (see, for example, Patent Document 2).
JP 2001-173017 A (first page, FIG. 1) JP 2004-330807 A (first page, FIG. 1)

  This L-shaped stopper can cope with deformation load from the side and upper side of the cab, but cannot cope with deformation load from the rear of the cab.

  The present invention has been made in view of such a point, and an object thereof is to provide a cab protection structure and a work machine that can cope with at least a deformation load from the rear of the cab.

  According to the first aspect of the present invention, an airframe frame, a cab installed on the airframe frame, one engaging member projecting from the cab, and the one engaging member from the airframe frame side. The other engaging member that protrudes and engages, and the one engaging member and the other engaging member are disposed opposite to each other with a gap therebetween and restrict the lateral movement of the cab. A moving engagement surface, a lower moving engagement surface that is installed opposite to each other via a gap and restricts the downward movement of the cab, and a front that is placed opposite to each other via a gap and restricts the forward movement of the cab A cab protection structure having a moving engagement surface.

  According to a second aspect of the present invention, the cab in the cab protection structure according to the first aspect includes a cab main body and a reinforcing member attached to the cab main body, and the one engaging member includes the cab main body and the reinforcing member. Projecting from at least one of the above.

  According to a third aspect of the present invention, the one engagement member and the other engagement member in the cab protection structure according to the first or second aspect are opposed to each other with a gap therebetween to restrict the rearward movement of the cab. A rear movement engagement surface is provided.

  According to a fourth aspect of the present invention, in the cab protection structure according to the third aspect of the present invention, the lateral movement engagement surfaces are opposed to each other with a gap therebetween and restrict the movement of the cab to the right side. And a left side moving engagement surface that is opposed to each other via a gap and restricts the left side movement of the cab.

  The invention according to claim 5 is the upward movement in which the one engagement member and the other engagement member in the cab protection structure according to claim 4 are installed to face each other via a gap and restrict the upward movement of the cab. An engagement surface is provided.

  According to a sixth aspect of the present invention, in the cab protection structure according to the first or second aspect, the one engagement member and the other engagement member are installed to face each other via a gap, and the cab moves in all directions on a spherical surface. It is provided with an omnidirectional moving engagement surface that regulates the above.

  According to a seventh aspect of the present invention, in the cab protection structure according to the first or second aspect, the one engagement member and the other engagement member are disposed to face each other with a gap therebetween, and the cab has six or more polygonal surfaces. An omnidirectional moving engagement surface that restricts movement in all directions is provided.

  The invention according to claim 8 comprises the cab protection structure according to any one of claims 1 to 7 and a work device installed on one side of the cab on the body frame, and from the cab to the work device side. This is a working machine in which the other engaging member is protruded from the body frame side with respect to the one engaging member.

  According to the first aspect of the present invention, one engaging member protrudes from the cab, and the other engaging member protrudes from the body frame side with respect to the one engaging member. A lateral movement engagement surface that regulates lateral movement of the cab, a downward movement engagement surface that regulates downward movement of the cab, and a forward movement engagement that regulates forward movement of the cab. Since the surfaces are opposed to each other with a gap between them, it is possible to cope with deformation loads from the side and upper side of the cab, as well as deformation loads from the rear of the cab. Deformation can be reduced.

  According to the second aspect of the present invention, the cab is formed by the engagement of one engaging member protruding from at least one of the cab main body and the reinforcing member and the other engaging member protruding from the body frame side. The deformation of the cab due to these deformation loads can be reduced.

  According to the third aspect of the present invention, the engagement between the one engagement member and the other engagement member can cope with the deformation load from the side, the upper side and the rear side of the cab, The other engaging member is provided with rearward moving engaging surfaces that restrict the rearward movement of the cab with a gap therebetween, so that it can cope with deformation load from the front of the cab. On the other hand, the deformation of the cab due to the deformation load from the upper side, the rear side and the front side can be reduced.

  According to the fourth aspect of the present invention, the engagement between one engagement member and the other engagement member can cope with a deformation load from above, rearward and frontward of the cab, and the lateral movement engagement surface is The cab has a right-side movement engagement surface that restricts the movement of the cab to the right side and a left-side movement engagement surface that restricts the movement of the cab to the left side. It can cope with load, and deformation of the cab due to deformation load from the left side, right side, upper side, rear side and front side can be reduced.

  According to the fifth aspect of the present invention, the engagement between one engagement member and the other engagement member can cope with deformation loads from the left side, right side, upper side, rear side and front side of the cab, Since the engaging member and the other engaging member have an upward moving engaging surface that restricts upward movement of the cab, they can cope with deformation load from the lower side of the cab. The deformation of the cab due to deformation loads from the upper, lower, rear and front can be reduced.

  According to the sixth aspect of the present invention, the one engaging member and the other engaging member are spherical and have omnidirectional moving engaging surfaces that restrict the movement of the cab in all directions. The direction moving engagement surface can cope with deformation loads from all directions of the cab, and the deformation of the cab due to these deformation loads can be reduced.

  According to the seventh aspect of the present invention, the one engaging member and the other engaging member include omnidirectional moving engaging surfaces that restrict movement of the cab in all directions on six or more polygonal surfaces. Therefore, the omnidirectional moving engagement surface can cope with deformation loads from all directions of the cab, and the deformation of the cab due to these deformation loads can be reduced.

  According to the eighth aspect of the present invention, the working device is installed on one side of the cab on the machine body frame, and one engagement member of the cab protection structure is projected from the cab to the working device side. Since the other engagement member of the cab protection structure protrudes, the lateral deformation load from the working device side can be received by the working device, and at least the lateral deformation load from the opposite side, The deformation load from the rear and the deformation load from the rear can be received by the engagement between the one engagement member and the other engagement member, and the deformation of the cab due to these deformation loads can be reduced.

  Hereinafter, the first embodiment shown in FIGS. 1 to 4, the second embodiment shown in FIG. 5, the third embodiment shown in FIG. 6, and FIG. 7. The fourth embodiment, the fifth embodiment shown in FIG. 8, the sixth embodiment shown in FIG. 9, and the seventh embodiment shown in FIG. 10 will be described in detail.

  The hydraulic excavator as a work machine shown in FIG. 4 is provided with an upper machine frame 12 that is turnable with respect to a lower traveling body 11, and a work device 13 is installed on the machine frame 12. A cab 14 is installed on the fuselage frame 12 on the side of the vehicle.

  As shown in FIG. 1, the cab 14 has a window frame reinforcing member 14c as a reinforcing member for reinforcing the rear window 14b of the cab main body 14a fixedly attached to the rear portion of the cab main body 14a. A stopper member 17 as one engaging member protrudes from the working device 13 side to the side.

  On the other hand, a receiving member 18 as the other engaging member that engages with the stopper member 17 projects from the body frame 12 side. That is, the receiving member 18 is fixed to one of the pair of bracket portions 12bk that pivotally supports the boom base end portion 13bm of the work device 13 in a rotatable manner.

  As shown in FIGS. 2 and 3, the stopper member 17 and the receiving member 18 are provided with side movement engagement surfaces 21 for restricting the movement of the cab 14 to the side through a gap 22. The downward movement engagement surface 23 that restricts the downward movement of the cab 14 is disposed opposite to each other via a gap 24 (FIG. 1), and the forward movement engagement surface 25 that restricts the forward movement of the cab 14 is provided. They are opposed to each other with a gap 26 therebetween.

  The receiving member 18 has a concave portion 27 formed by three surfaces, that is, a side movement engagement surface 21, a downward movement engagement surface 23, and a front movement engagement surface 25, and the stopper member 17 has gaps 22, 24, 26 having predetermined values. When moving beyond the limit, the stopper member 17 interferes with each surface.

  In this manner, the stopper member 17 is fixed to the side surface of the window frame reinforcing member 14c in such a manner that the periphery of the rear window 14b of the cab 14 is reinforced from the window frame reinforcing member 14c to the body frame 12 side. The receiving member 18 is fixed to the body frame 12 through the gaps 22, 24, 26 having predetermined values. The predetermined gaps 22, 24, and 26 are set to values that are larger than the values that the cab 14 vibrates and moves during normal aircraft operation.

  Next, the function and effect of this embodiment will be described.

  When a large deformation load acts on the side surface of the cab 14 from the left side of the cab 14 in FIG. 1 and the cab 14 is deformed to the working device 13 side, the side movement engagement surface 21 of the stopper member 17 has a gap 22 having a predetermined value. The side movement engagement surface 21 of the receiving member 18 is further engaged with the work device 13 side of the cab 14 beyond that. Regulate deformation.

  In addition, when a large load acts on the ceiling surface of the cab 14 from above the cab 14 and the cab 14 is deformed downward, the downward moving engagement surface 23 of the stopper member 17 reduces the gap 24 having a predetermined value. Since it moves and engages with the downward movement engagement surface 23 of the receiving member 18, the downward movement engagement surface 23 of the reception member 18 restricts further deformation of the cab 14 downward.

  Further, when a large load acts on the window frame reinforcing member 14c of the cab 14 from the rear of the cab 14 and the cab 14 is deformed forward, the forward moving engagement surface 25 of the stopper member 17 has a gap 26 having a predetermined value. Since it moves so as to shrink and engages with the forward movement engagement surface 25 of the receiving member 18, the forward movement engagement surface 25 of the reception member 18 restricts further forward deformation of the cab 14.

  In this way, the stopper member 17 protrudes laterally from the window frame reinforcing member 14c attached to the cab 14, and the receiving member 18 protrudes from the body frame 12 side with respect to the stopper member 17, and these stopper members 17 and the receiving member 18 include a lateral movement engagement surface 21 that regulates the lateral movement of the cab 14, a downward movement engagement surface 23 that regulates the downward movement of the cab 14, and a front side of the cab 14. The front moving engagement surface 25 that restricts the movement to the cab 14 is opposed to each other via the gaps 22, 24, and 26, so that it can cope with deformation loads from the side and the upper side of the cab 14, and the cab 14 The deformation of the cab 14 due to these deformation loads can be reduced.

  In addition, a work device 13 and a cab 14 are installed on the machine body frame 12, and a stopper member 17 projects from the window frame reinforcing member 14c attached to the cab 14 to the side on the work device 13 side. On the other hand, since the receiving member 18 protrudes from the body frame 12 side, the lateral deformation load (deformation load from the right side) from the work device 13 side can be received by the work device 13 and from the opposite side. Deformation load from the left side (deformation load from the left side), deformation load from above, and deformation load from the rear can be received by the engagement of the stopper member 17 and the receiving member 18, and these deformation loads The deformation of the cab 14 can be reduced.

  Next, another embodiment of the present invention will be described with reference to FIGS.

  In the second embodiment shown in FIG. 5, the receiving member 18 is formed in a U shape in a plan view, and the stopper member 17 and the receiving member 18 are laterally moved to restrict the lateral movement of the cab 14. Engagement surfaces 21 are opposed to each other via a gap 22, and downward moving engagement surfaces 23 that restrict downward movement of the cab 14 are opposed to each other via a gap. Front moving engagement surfaces 25 that restrict movement are mutually opposed via a gap 26, and rearward movement engaging surfaces 28 that regulate rearward movement of the cab 14 are mutually opposed via a gap 29. Yes.

  As described above, according to the embodiment shown in FIG. 5, the stopper member 17 and the receiving member 18 are provided with the lateral movement engagement surface 21, the downward movement engagement surface 23, and the forward movement engagement surface 25. Since they are opposed to each other through a gap, deformation loads from the left side, upper side and rear side of the cab 14 can be locked, and deformation of the cab 14 due to these deformation loads can be reduced, and the stopper member 17 and the receiving member can be received. Since the member 18 is provided with a rearward movement engagement surface 28 that restricts the rearward movement of the cab 14 via a gap 29, the deformation load from the front of the cab 14 can also be locked. The deformation of the cab 14 due to the deformation load can be reduced.

  In the third embodiment shown in FIG. 6, the recess 27 of the stopper member 17 and the receiving member 18 is formed in an L shape in a plan view, and the stopper member 17 and the receiving member 18 are formed on the right side of the cab 14. The right side moving engagement surfaces 21R that restrict movement are opposed to each other via a gap 22R, and the left side movement engaging surfaces 21L that restrict movement of the cab 14 to the left side are opposed to each other via a gap 22L. The downward movement engagement surface 23 that is installed and restricts the downward movement of the cab 14 is opposed to each other via a gap, and the forward movement engagement surface 25 that restricts the forward movement of the cab 14 is a gap between each other. The rearward moving engagement surfaces 28 that face the rear side of the cab 14 and restrict the rearward movement of the cab 14 are opposed to each other with a gap 29 therebetween.

  As described above, according to the embodiment shown in FIG. 6, the stopper member 17 and the receiving member 18 are provided with a right side moving engagement surface 21R, a left side moving engagement surface 21L, and a downward movement engagement surface 23. Since the front moving engagement surface 25 and the rear moving engagement surface 28 are opposed to each other with a gap between them, the deformation load from the left side, right side, upper side, rear side and front side of the cab 14 is locked. Therefore, the deformation of the cab 14 due to these deformation loads can be reduced.

  In the fourth embodiment shown in FIG. 7, the stopper member 17 and the recess 27 of the receiving member 18 are formed in a T shape in a plan view, and the stopper member 17 and the receiving member 18 are formed on the right side of the cab 14. The right side moving engagement surfaces 21R that restrict movement are opposed to each other via a gap 22R, and the left side movement engaging surfaces 21L that restrict movement of the cab 14 to the left side are opposed to each other via a gap 22L. The downward movement engagement surface 23 that is installed and restricts the downward movement of the cab 14 is opposed to each other via a gap, and the forward movement engagement surface 25 that restricts the forward movement of the cab 14 is a gap between each other. The rearward moving engagement surfaces 28 that are opposed to each other via 26 and restrict the rearward movement of the cab 14 are opposed to each other via a gap 29.

  Thus, according to the embodiment shown in FIG. 7, the stopper member 17 and the receiving member 18 are provided with a right side moving engagement surface 21R, a left side moving engagement surface 21L, and a downward movement engagement surface 23. Since the front moving engagement surface 25 and the rear moving engagement surface 28 are opposed to each other with a gap between them, the deformation load from the left side, right side, upper side, rear side and front side of the cab 14 is locked. And deformation of the cab 14 due to these deformation loads can be reduced.

  In the fifth embodiment shown in FIG. 8, the recess 27 of the stopper member 17 and the receiving member 18 is formed in a cross shape in a plan view, and the stopper member 17 and the receiving member 18 are formed on the right side of the cab 14. The right side moving engagement surfaces 21R that restrict movement are opposed to each other via a gap 22R, and the left side movement engaging surfaces 21L that restrict movement of the cab 14 to the left side are opposed to each other via a gap 22L. The downward movement engagement surface 23 that is installed and restricts the downward movement of the cab 14 is opposed to each other via a gap, and the forward movement engagement surface 25 that restricts the forward movement of the cab 14 is a gap between each other. The rearward moving engagement surfaces 28 that are opposed to each other via 26 and restrict the rearward movement of the cab 14 are opposed to each other via a gap 29.

  Thus, according to the embodiment shown in FIG. 8, the stopper member 17 and the receiving member 18 are provided with a right side moving engagement surface 21R, a left side moving engagement surface 21L, and a downward movement engaging surface 23. Since the front moving engagement surface 25 and the rear moving engagement surface 28 are opposed to each other with a gap between them, the deformation load from the left side, right side, upper side, rear side and front side of the cab 14 is locked. Therefore, the deformation of the cab 14 due to these deformation loads can be reduced.

  In the sixth embodiment shown in FIG. 9, the stopper member 17 and the receiving member 18 are provided with omnidirectional moving engagement surfaces 31 that are spherical and restrict the movement of the cab 14 in all directions, with a gap 32 therebetween. Are installed opposite to each other.

  The omnidirectional movement engagement surface 31 includes at least a right side movement engagement surface 21R as a side movement engagement surface that restricts movement of the cab 14 to the right side, and movement of the cab 14 to the left side. The left side moving engagement surface 21L as the side movement engaging surface to be controlled, the downward movement engaging surface 23 for restricting the downward movement of the cab 14, and the forward movement mechanism for restricting the forward movement of the cab 14 The mating surface 25, the rearward movement engagement surface 28 that restricts the rearward movement of the cab 14, and the upper movement engagement surface 33 that restricts the upward movement of the cab 14 are opposed to each other with a gap 32 therebetween. is set up.

  As described above, according to the embodiment shown in FIG. 9, the stopper member 17 and the receiving member 18 are spherical and include the upward moving engagement surface 33 that restricts the upward movement of the cab 14. Since the omnidirectional moving engagement surface 31 that restricts the movement of the cab in all directions is provided, the omnidirectional moving engagement surface 31 allows the cab 14 to move from the left side, the right side, the upper side, the lower side, the rear side, and the front side. Not only deformation loads but also deformation loads from all directions can be handled, and deformation of the cab 14 due to these deformation loads can be reduced.

  In the seventh embodiment shown in FIG. 10, the stopper member 17 and the receiving member 18 are provided with an omnidirectional moving engagement surface 31 for restricting movement of the cab 14 in all directions on six or more polygonal surfaces. Are installed opposite to each other through a gap 32. As long as the stopper member 17 and the receiving member 18 have six or more engaging surfaces, the stopper member 17 and the receiving member 18 may have a polygonal prism shape as illustrated, or may be a polyhedron similar to a spherical surface.

  The omnidirectional movement engagement surface 31 includes at least a right side movement engagement surface 21R as a side movement engagement surface that restricts movement of the cab 14 to the right side, and movement of the cab 14 to the left side. The left side moving engagement surface 21L as the side movement engaging surface to be controlled, the downward movement engaging surface 23 for restricting the downward movement of the cab 14, and the forward movement mechanism for restricting the forward movement of the cab 14 The mating surface 25, the rearward movement engagement surface 28 that restricts the rearward movement of the cab 14, and the upper movement engagement surface 33 that restricts the upward movement of the cab 14 are opposed to each other with a gap 32 therebetween. is set up.

  As described above, according to the embodiment shown in FIG. 10, the stopper member 17 and the receiving member 18 include six or more surfaces including the upward movement engagement surface 33 that restricts the upward movement of the cab 14. Since the omnidirectional movement engagement surface 31 that restricts the movement of the cab 14 in all directions on a polygonal surface is provided, the omnidirectional movement engagement surface 31 allows the left side, right side, upper side, lower side of the cab 14, Not only deformation loads from the rear and front but also deformation loads from all directions can be handled, and deformation of the cab 14 due to these deformation loads can be reduced.

  As described above, the left and right opposing surfaces of the stopper member 17 and the receiving member 18 when the cab 14 receives deformation load from the left and right side surfaces, and the stopper member 17 and the receiving surface when the cab 14 receives deformation load from above and below. When the cab 14 receives deformation loads from the front and rear, the upper and lower opposing surfaces of the member 18 interfere with each other, and the deformation of the cab 14 can be reduced.

  Next, an embodiment not shown will be described.

  The reinforcing member may be a guard member attached to the upper half of the frame structure forming the cab 14 from the outside of the cab 14 instead of the window frame reinforcing member 14c that reinforces the rear window 14b.

  Further, each member may be fixed by welding or using a fastening member such as a bolt.

  Furthermore, the relationship between the stopper member 17 and the receiving member 18 may be reversed. In other words, the receiving member 18 as one engaging member may be disposed on the reinforcing member side of the cab 14, and the stopper member 17 as the other engaging member may be disposed on the body frame 12 side.

  In the illustrated embodiment, the stopper member 17 as one engaging member is fixed to the window frame reinforcing member 14c of the cab 14, but the stopper member 17 or receiving member as one engaging member is fixed to the cab body 14a. 18 may be installed directly. In that case, the stopper member 17 or the receiving member 18 may be formed integrally with the cab body 14a or the window frame reinforcing member 14c.

  The work machine is not limited to a hydraulic excavator, and can be applied to a loader, a bulldozer, or the like.

It is a perspective view which shows 1st Embodiment of the cab protection structure which concerns on this invention. It is a perspective view which shows the body frame side of a protection structure same as the above. It is a top view which shows the principal part of a protection structure same as the above. It is a top view of the working machine provided with the protection structure same as the above. It is a top view which shows 2nd Embodiment of the principal part of a protection structure same as the above. It is a top view which shows 3rd Embodiment of the principal part of a protection structure same as the above. It is a top view which shows 4th Embodiment of the principal part of a protection structure same as the above. It is a top view which shows 5th Embodiment of the principal part of a protection structure same as the above. (A) is the horizontal sectional view which shows 6th Embodiment of the principal part of a protection structure same as the above, (b) is the vertical sectional view. (A) is the horizontal sectional view which shows 7th Embodiment of the principal part of a protection structure same as the above, (b) is the vertical sectional view.

Explanation of symbols

12 Airframe frame
13 Working device
14 cab
14a Cab body
14c Window frame reinforcement member as reinforcement member
17 Stopper member as one engaging member
18 Receiving member as the other engaging member
21 Side-moving engagement surface
21R Rightward moving engagement surface
21L Left side moving engagement surface
22 Clearance
22R clearance
22L clearance
23 Downward moving engagement surface
24 Clearance
25 Forward moving engagement surface
26 Clearance
28 Backward moving engagement surface
29 Clearance
31 Omni-directional moving engagement surface
32 Clearance
33 Upward moving engagement surface

Claims (8)

The fuselage frame,
The cab installed on the fuselage frame,
One engaging member protruding from the cab;
The other engaging member that protrudes from the body frame side and engages with the one engaging member,
One engaging member and the other engaging member are
A laterally moving engagement surface that is opposed to each other through a gap and regulates lateral movement of the cab;
A downward movement engagement surface that is opposed to each other through a gap and restricts the downward movement of the cab;
A cab protection structure comprising: a front moving engagement surface that is opposed to each other through a gap and restricts the forward movement of the cab. The cab
The cab body,
Comprising a reinforcing member attached to the cab body,
One engaging member is
The cab protection structure according to claim 1, wherein the cab protection structure protrudes from at least one of the cab body and the reinforcing member. One engaging member and the other engaging member are
3. The cab protection structure according to claim 1, further comprising a rearward movement engagement surface that is opposed to each other with a gap therebetween and restricts rearward movement of the cab. Side movement engagement surface
A right-side movement engagement surface that is opposed to each other via a gap and restricts the movement of the cab to the right side;
The cab protection structure according to claim 3, further comprising a left side moving engagement surface that is opposed to each other through a gap and restricts the left side movement of the cab. One engaging member and the other engaging member are
5. The cab protection structure according to claim 4, further comprising an upward movement engagement surface that is opposed to each other with a gap therebetween and restricts upward movement of the cab. One engaging member and the other engaging member are
3. The cab protection structure according to claim 1, further comprising an omnidirectional moving engagement surface that is opposed to each other with a gap and restricts movement of the cab in all directions by a spherical surface. One engaging member and the other engaging member are
The cab protection structure according to claim 1 or 2, further comprising an omnidirectional moving engagement surface that is opposed to each other with a gap and restricts movement of the cab in all directions on six or more polygonal surfaces. . The cab protection structure according to any one of claims 1 to 7,
And a work device installed on one side of the cab on the fuselage frame,
One engaging member protrudes from the cab to the working device side,
A working machine characterized in that the other engaging member protrudes from the body frame side with respect to the one engaging member.

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