Surface layer remover, attachment

Abstract

To provide a surface layer removing machine capable of enhancing versatility and attachment's rigidity, excellently fixing the attachment to a rolling compaction plate, relieving impact and reducing the generation of noise.SOLUTION: A surface layer removing machine 1 is provided with an attachment 12 attached to a rolling compaction plate 10 of a rammer 3 and having a plurality of projections 50 striking an asphalt mixture layer, and the attachment 12 is a box-shaped member 13 opening upward, and the rolling compaction plate 10 is arranged inside the box-shaped member 13 with an impact absorbing member 34 sandwiched therebetween, and the rolling compaction plate 10 is fastened and fixed with a pressing plate from an opening 15 (opening side).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a surface layer remover. [Background technology]

[0002] Conventionally, the asphalt mixture layer remaining on the concrete slab after cutting and removing with a cutting machine is removed with a chipping machine or a metal brush. Patent Document 1 discloses an impact type roller compactor in which a plurality of protrusions are provided on the bottom surface of the rammer's rolling plate. Patent Document 2 discloses an impact type roller compactor in which an attachment with spike-shaped protrusions is detachably attached with bolts to the bottom surface of the rammer's rolling plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3142825

[0004] [Patent Document 2] Japanese Utility Model Application Publication No. 3-29507 Summary of the Invention [Problem to be solved by the invention]

[0005] The technologies of Patent Documents 1 and 2 require the processing of protrusions on the rammer's rolling plate and bolt holes for mounting attachments, and so cannot be used with ordinary rammers as is, resulting in poor versatility. In addition, when removing the asphalt mixture layer remaining on the concrete slab, a considerable striking force is required, which makes the rigidity of the attachment an issue, and causes problems such as excessive impact and the associated noise. The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a surface layer remover that can increase versatility and attachment rigidity, mitigate impact, and reduce noise. [Means for solving the problem]

[0006] The present invention relates to a surface layer remover having an attachment having a plurality of protrusions attached to a rolling plate of a rammer and striking an asphalt mixture layer, the attachment being a box-shaped member having an opening at the top, A pressure plate having a front wall, a rear wall, and a pair of side walls so as to surround substantially the entire periphery of the pressure plate, and a plurality of the protrusions on a bottom surface thereof; The rolling plate is disposed inside the box-shaped member with the shock absorbing member sandwiched therebetween, and the rolling plate is fastened and fixed from the opening side with a pressing plate. In addition, an attachment is attached to the rolling plate of a rammer and has multiple protrusions that strike the asphalt mixture layer, and is a box-shaped member that opens at the top, has a front wall, a rear wall and a pair of side walls that surround almost the entire periphery of the rolling plate, and is provided with multiple protrusions on its bottom surface, and the rolling plate is positioned inside the box-shaped member with an impact absorbing member sandwiched between them, and the rolling plate is tightened and fixed from the opening side with a pressure plate. Effect of the Invention

[0007] According to the present invention, the versatility and rigidity of the attachment are increased, the attachment is well fixed to the rolling plate, impact is mitigated, and noise generation can be reduced. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a surface layer remover on a deck slab. [Diagram 2] FIG. [Diagram 3] Cross section AA of Figure 2. [Figure 4] FIG. [Diagram 5] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [1. Configuration of the embodiment] FIG. 1 is a perspective view of a surface layer remover 1 on a deck slab. FIG. 1 shows an X-axis, a Y-axis, and a Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other. The Z-axis extends in the vertical direction, with the +Z direction being the upward direction. The X-axis and Y-axis are parallel to the horizontal plane. In the following description, the direction along the X-axis is the front-back direction, and the +X direction is the forward direction. The direction along the Y-axis is the left-right direction, and the +Y direction is the leftward direction. The X-axis, Y-axis, and Z-axis in FIG. 1 show the same directions in each of the other figures.

[0010] Fig. 2 is a plan view of the attachment 12 as viewed from above. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. Fig. 4 is a side view of the attachment 12 and the rolling plate 10. Fig. 5 is a plan view of the attachment 12 as viewed from below. For the sake of explanation, Figs. 2 and 3 do not show the rolling plate 10 and the fixing device 40, and Fig. 4 does not show the support shaft 9.

[0011] The surface layer remover 1 is composed of a tamping rammer 3 and an attachment 12 that is attached to a rolling plate 10 of the rammer 3. As shown in Fig. 1, the rammer 3 comprises an engine prime mover 2 and a vibrator 5 connected to the prime mover 2, and a support shaft 9 is attached to the lower part of the vibrator 5 via a bellows 7. A rolling plate 10 is attached to the lower part of the support shaft 9, and an attachment 12 is attached to the rolling plate 10 with a plate-shaped rubber sheet (shock absorbing member) 34 shown in Fig. 2 and Fig. 3 sandwiched therebetween. The prime mover 2 is not limited to an internal combustion engine and may be an electric motor.

[0012] A pressure plate warped portion 10U, which is the front portion of the pressure plate 10, is bent upward. An attachment warped portion 12U, which is the front portion of the attachment 12, is bent upward so as to fit along the surface of the bent pressure plate 10. The attachment warped portion 12U is located forward of the rammer 3 in the traveling direction.

[0013] 2 and 3, the attachment 12 has a front wall 16 at the front, a rear wall 18 at the rear, and two side walls 20, one on each side. In other words, the attachment 12 is a box-shaped member without a lid, and the rolling plate 10 is disposed so as to be surrounded by the front wall 16, the rear wall 18, and the side walls 20.

[0014] That is, the attachment 12 has a box-shaped member 13 having an opening 15 at the top. The side surfaces of the rolling plate 10 are surrounded by four wall portions, namely, a front wall 16, a rear wall 18, and a side wall 20. The side surfaces of the rolling plate 10 are in contact with or located in the vicinity of the front wall 16, the rear wall 18, and the side wall 20.

[0015] The front wall 16 is provided with a front pressure plate 22 at its upper portion, and a front height adjusting plate 26 is provided between the upper surface of the front wall 16 and the front pressure plate 22. The rear wall 18 is provided with a rear pressure plate 24 at its upper portion, and a rear height adjusting plate 28 is provided between the upper surface of the rear wall 18 and the rear pressure plate 24.

[0016] The front pressure plate 22 and the rear pressure plate 24 are each provided with three through holes 30, and the front wall 16 and the rear wall 18 are formed with screw holes 32 in a number corresponding to each of the through holes 30. In addition, the front height adjustment plate 26 and the rear height adjustment plate 28 are provided with through holes at positions corresponding to each of the through holes 30.

[0017] The front pressure plate 22 and the rear pressure plate 24 are fixed to the front wall 16 and the rear wall 18 by three fasteners 40 via three through holes 30. The width of the front pressure plate 22 and the rear pressure plate 24 in the short side direction is large enough not to interfere with the lower part of the support shaft 9.

[0018] The rolling plate 10 is fixed by being pressed against the inside of the box-shaped member 13 by the front pressing plate 22 and the rear pressing plate 24. A rubber sheet 34 is disposed on the inside of the box-shaped member 13, and the rolling plate 10 is disposed on the rubber sheet 34. The height including the front wall 16 and the front height changing plate 26 and the height including the rear wall 18 and the rear height changing plate 28 are formed to be slightly lower than the upper surface of the rolling plate 10 arranged on the rubber sheet 34. The front height changing plate 26 and the rear height changing plate 28 may be changed to changing plates of different thicknesses according to the thickness of the rubber sheet 34 and the rolling plate 10. The thickness of the front height changing plate 26 and the rear height changing plate 28 may be adjusted by the thickness of the rubber sheet 34 without changing it. As shown in FIG. 4, by fastening the front pressing plate 22 and the rear pressing plate 24 with a plurality of fasteners 40, the rubber sheet 34 is compressed, and the rolling plate 10 is fixed to the inside of the box-shaped member 13. According to this configuration, when attaching the attachment 12, it is not necessary to process protrusions or bolt holes on the rolling plate 10, and a general rammer can be used as it is, and versatility is improved. In addition, the rubber sheet 34 is placed under pressure on the inside of the attachment 12, which reduces the impact on the worker and reduces noise generation.

[0019] 2 and 3, the rubber sheet 34 is disposed so as to contact the inner surface 12A of the attachment 12. As shown in FIG. 4, the front part of the rubber sheet 34 is bent so as to follow the rolling plate warped part 10U and the attachment warped part 12U, forming a rubber sheet warped part 34U. The thickness of the rubber sheet 34 is about one-fifth the thickness of the rolling plate 10. For example, when the thickness of the rolling plate 10 is "50 mm", the thickness of the rubber sheet 34 is "10 mm". The material of the rubber sheet 34 is preferably hard rubber, for example. In a plan view, the size of the rubber sheet 34 is smaller than the size of the rolling plate 10.

[0020] The pressure plate 10 has two presser plates 14, one on each side, on its upper surface. The presser plates 14 increase the rigidity of the pressure plate 10 and are substantially rectangular in plan view. The presser plates 14 are fixed to the upper surface of the pressure plate 10 by three fasteners 42. The attachment 12 includes a front wall 16, a rear wall 18, and two side walls 20. A front holding plate 22, a front height adjusting plate 26, a rear holding plate 24, and a rear height adjusting plate 28 are arranged on the front wall 16 and the rear wall 18. With this configuration, the section modulus of the attachment 12 is increased, and the rigidity of the attachment 12 against bending stress is increased.

[0021] 3, a plurality of protrusions 50 are provided on the bottom surface 12B of the attachment 12. The protrusions 50 include a base 54 connected to the bottom surface 12B and a cutting body 56 (protrusion body) connected to the tip of the base 54.

[0022] The cutting body 56 is made of a hard alloy, which is suitable for cutting asphalt. The projection 50 has a base 54 welded to the bottom surface 12B, and the cutting body 56 is brazed to the base 54.

[0023] As shown in FIG. 5, the multiple protrusions 50 are arranged side by side in a direction perpendicular to the traveling direction of the rammer 3, and are provided in multiple rows from the front to the rear in the traveling direction of the rammer 3.

[0024] In FIG. 5, the rows 62 are shown by imaginary lines extending in the left-right direction, and a first row 62A, a second row 62B, a third row 62C, a fourth row 62D, and a fifth row 62E are shown. Three protrusions 50 are arranged side by side in the first row 62A, which is the front row of the bottom surface 12B of the attachment 12. Four protrusions 50 are arranged in the second row 62B, which is the row thereafter. Four protrusions 50 are also arranged in the third row 62C, which is the row thereafter. Furthermore, four protrusions 50 are arranged in the fourth row 62D, which is the row thereafter. Finally, three protrusions 50 are arranged side by side in the fifth row 62E, which is the row thereafter.

[0025] That is, when viewed from the rear of the attachment 12, the multiple protrusions 50 arranged in each of the two adjacent rows are arranged such that the protrusions 50 in the rear row are located between the protrusions 50 in the front row. When viewed from the rear of the attachment 12, the protrusions 50 are arranged such that the tips of the cutting portions 56 in the rear row are located between the tips of the cutting portions 56 in the front row. The tips of the cutting portions 56 of the multiple protrusions 50 arranged in the second row 62B, the third row 62C, and the fourth row 62D do not overlap with each other in any combination with the protrusions 50.

[0026] [2. Effect] As shown in Figures 1 and 2, the surface layer remover 1 configured as described above operates the vibrator 5 by the prime mover 2 to vibrate the rolling plate 10 in the direction of the support shaft 9 via the bellows 7. When the rolling plate 10 vibrates, the attachment 12 and the multiple protrusions 50 attached to the attachment 12 shown in Figure 5 strike the asphalt mixture layer (surface layer) formed on the concrete deck. The multiple protrusions 50 are provided with cutting bodies 56 (protrusions) made of cemented carbide at their tips, and the cutting bodies 56 have sufficient hardness and durability compared to the asphalt mixture layer, so that they can destroy and remove the asphalt mixture layer. In addition, the surface layer remover 1 can easily remove the surface layer because it strikes the surface layer using the cutting body 56. This shortens the time required for removal work using the tamping rammer 3, and can suppress damage to the concrete slab.

[0027] As shown in Fig. 5, each of the plurality of protrusions 50 is provided along each row extending in the left-right direction. The plurality of protrusions 50 arranged in two adjacent rows are positioned such that the tips of the cutting parts 56 do not overlap when viewed from the rear of the attachment 12. Therefore, when the surface layer remover 1 strikes the asphalt mixture layer while moving forward, it is possible to strike the asphalt mixture layer in an area not struck by the plurality of protrusions 50 in the front row. In other words, it is possible to strike the asphalt mixture layer in an area that the surface layer remover 1 passes through without missing anything.

[0028] 2 and 3, a rubber sheet 34 is sandwiched between the rolling plate 10 and the attachment 12, and the rubber sheet 34 absorbs vibrations. Also, the attachment 12 includes a front wall 16, a rear wall 18, and a side wall 20, so that the side surface of the rolling plate 10 and the rubber sheet 34 are covered. Therefore, the rolling plate 10 and the rubber sheet 34 can be prevented from wearing out.

[0029] [3. Effects] As described above, in this embodiment, the surface layer remover 1 is equipped with an attachment 12 which is attached to the rolling plate 10 of the rammer 3 and has a plurality of protrusions 50 which strike the asphalt mixture layer, and the attachment 12 is a box-shaped member 13 which is open at the top, and the rolling plate 10 is arranged inside the box-shaped member 13 with a rubber sheet 34 (shock absorbing member) sandwiched between them, and the rolling plate 10 is clamped and fixed from the opening 15 (opening side) by a front pressure plate 22 (pressure plate) and a rear pressure plate 24 (pressure plate). According to this configuration, when mounting the attachment 12, it is not necessary to process projections or bolt holes on the rolling plate 10, and a general rammer can be used as is, improving versatility. In addition, since the rubber sheet 34 is compressed and arranged inside the attachment 12, the rubber sheet 34 absorbs impacts, mitigating impacts on the worker and reducing noise generation. In addition, since the attachment 12 is formed of a box-shaped member 13, the durability of the rolling plate 10 and the rubber sheet 34 is improved. In addition, the front pressure plate 22 and the rear pressure plate 24 that fasten and fix the rolling plate 10 are fixed by the fixing device 40, but even if the fixing device 40 becomes loose, the attachment 12 is formed of a box-shaped member 13, so that the lateral displacement of the rolling plate 10 is held down by the side wall 20, and the attachment 12 does not come off the rolling plate 10 and can be fixed well.

[0030] In this embodiment, the pressure plate may include a front pressure plate arranged on the front wall of the box-shaped member 13 and a rear pressure plate 24 arranged on the rear wall of the box-shaped member 13 . This increases the rigidity of the attachment 12, reduces the impact on the worker, and reduces noise generation. Also, the warped portion 10U of the rolling plate 10 can be fixed well, improving the fixing strength of the rolling plate 10.

[0031] In this embodiment, substantially the entire periphery of the rolling plate 10 may be surrounded by the wall portions on the four sides of the box-shaped member 13 . This increases the rigidity of the attachment 12, reduces the impact on the worker, and suppresses noise generated when the surface layer removal machine 1 is used to remove the surface layer on the concrete slab.

[0032] In addition, in this embodiment, the multiple protrusions 50 may be arranged such that the rear row of protrusions 50 are located between the front row of protrusions 50 when viewed from the rear of the attachment 12. This allows the asphalt mixture layer to be removed efficiently.

[0033] In this embodiment, the projection 50 may also include a projection body 56 made of a cemented carbide. This makes it possible to destroy the surface layer on the concrete slab while minimizing damage to the concrete slab.

[0034] In this embodiment, the shock absorbing member may be a rubber sheet 34 . This can reduce the shock to the worker and reduce noise generation.

[0035] [4. Other embodiments] The present invention is not limited to the above-described embodiments, and various modifications are possible. Embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present invention.

[0036] In the above-described embodiment, as an example of the aspect in which the plurality of protrusions 50 are provided in multiple rows, the first row 62A, the second row 62B, the third row 62C, the fourth row 62D, and the fifth row 62E are provided, but these are only examples. The number of rows, the arrangement of the plurality of protrusions 50, and the like can be changed as long as the positions of the tips of the cutting portions 56 do not overlap.

[0037] The rolling plate 10 may be flat. In this case, the attachment 12 is also formed in a flat plate shape. [Explanation of symbols]

[0038] 1 Surface layer removal machine 3 Rammer 10 Rolling plate 12 Attachment 13 Box-shaped members 16 Front wall 18 Back wall 20 side wall 22 Front holding plate 24 Rear support plate 34 Rubber sheet (shock absorbing material) 50 protrusions 56 Cutting body (projection body)

Claims

1. A surface layer remover having an attachment having a plurality of protrusions attached to a rolling plate of a rammer and striking an asphalt mixture layer, The attachment is a box-shaped member that is open at the top, and has a front wall, a rear wall, and a pair of side walls that surround the substantially entire periphery of the rolling plate, and has a plurality of the protrusions on its bottom surface, The rolling plate is disposed inside the box-shaped member with the shock absorbing member sandwiched therebetween, and the rolling plate is fastened and fixed with a pressing plate from the opening side. Surface layer removal machine.

2. The pressure plate includes a front pressure plate disposed on a front wall of the box-shaped member and a rear pressure plate disposed on a rear wall of the box-shaped member. The surface layer remover according to claim 1.

3. The plurality of protrusions are arranged such that a rear row of protrusions is located between a front row of protrusions when viewed from the rear of the attachment. The surface layer remover according to claim 1.

4. The protrusions include protrusions made of cemented carbide. The surface layer remover according to claim 1.

5. The shock absorbing member is a rubber sheet. The surface layer remover according to claim 1.

6. An attachment having a plurality of protrusions attached to the rolling plate of a rammer for striking an asphalt mixture layer, a box-shaped member that is open at the top and has a front wall, a rear wall, and a pair of side walls that surround the substantially entire periphery of the rolling plate, and has a plurality of the protrusions on its bottom surface; The rolling plate is disposed inside the box-shaped member with a shock absorbing member sandwiched therebetween, and the rolling plate is fastened and fixed from the opening side with a pressing plate. attachment.

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