Sheet cutting attachment, bucket, and sheet cutting method

Abstract

To provide a sheet cutting attachment capable of easily cutting a sheet.SOLUTION: A sheet cutting attachment 1 is detachably attached to a claw adapter 3a of a bucket 3 in a drag shovel 2 equipped with the bucket 3, and is used to cut a sheet 5 laid on the ground surface. The sheet cutting attachment 1 includes an attachment body 11 that is fitted onto the claw adapter 3a and has a flat surface (slanted surface 11a) on at least one of the inside and outside in side view, a sheet cutting blade 13 formed of a strip-shaped plate material having two long sides and having a cutting edge 13a formed on at least one long side, and a mounting seat 15 that is installed upright on the flat surface of the attachment body 11 and that removably holds and supports the sheet cutting blade 13.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sheet cutting attachment that is attached to the bucket of a drag shovel equipped with a bucket and that cuts a sheet laid on the ground surface, a bucket, and a sheet cutting method. [Background technology]

[0002] Conventionally, a sheet cutting device is known that inserts the tip of an insertion plate into the back of a sheet of artificial turf or the like to lift the sheet, and then cuts the sheet with a vertical blade that rises from the insertion plate (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-169759 Summary of the Invention [Problem to be solved by the invention]

[0004] At disaster recovery sites such as those following the Great East Japan Earthquake, waste materials such as soil, rubble, and debris that may be contaminated with radiation or other contaminants must be temporarily stored in designated locations. In these cases, it is necessary to lay a waterproof sheet on top of the waste to prevent hazardous materials such as radiation and arsenic from leaking into the ground. This sheet is placed next to multiple sheets and the edges of the sheets are overlapped and welded together to prevent hazardous substances from leaking onto the ground surface. For this reason, after the waste is removed, the sheet needs to be discarded, but it is cut into pieces for easy transportation, and then the cut sheets are rolled up and loaded onto a truck. In the conventional sheet cutting device, the sheet may not be cut by the vertical blade and may become twisted, resulting in poor cutting.

[0005] In view of the above, an object of the present invention is to provide a sheet cutting attachment, a bucket, and a sheet cutting method that can easily cut a sheet. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides The drag shovel (e.g., the drag shovel 2 of the embodiment; the same applies hereinafter) is provided with a bucket (e.g., the bucket 3 of the embodiment; the same applies hereinafter), and is detachably attached to a claw adapter of the bucket, A sheet cutting attachment that pulls and cuts a sheet laid on the ground surface, an attachment body fitted onto the claw adapter and having a flat surface on at least one of the inner and outer sides in a side view; a sheet cutting blade formed of a rectangular plate material having two long sides, with a cutting edge formed on at least one of the long sides; a mounting seat provided on the flat surface of the attachment body and configured to detachably clamp and support the sheet cutting blade; The present invention is characterized by comprising:

[0007] According to the present invention, the sheet can be pulled and cut by the sheet cutting blade by moving the bucket forward while pressing the sheet with the outer surface of the tip of the bucket. Therefore, unlike conventional push cutting, the sheet can be easily cut by the sheet cutting blade while being pressed down by the bucket.

[0008] In addition, in the present invention, it is preferable that the mounting seat has through holes at multiple locations spaced apart in a direction along the planar portion, and that the sheet cutting blade, which also has through holes at multiple locations, is supported by bolt fastening.

[0009] According to this configuration, the sheet cutting blade is fixed to the mounting seat with a bolt, so that even if the blade of the sheet cutting blade falls off, it can be easily replaced.

[0010] In the present invention, it is preferable that the sheet cutting blade has through holes spaced apart in the length direction of the sheet cutting blade, the number of which is greater than the number of through holes in the mounting seat.

[0011] With this configuration, the number of through holes in the sheet cutting blade is greater than the number of through holes in the mounting seat, so the sheet cutting blade can be attached to the mounting seat upside down, so even if the tip of the sheet cutting blade falls off, the base end of the blade can be used.

[0012] In the present invention, the sheet cutting blade may also have a cutting edge on the other long side.

[0013] With this configuration, the sheet cutting blade has a cutting edge on the other long side edge, so the sheet cutting blade can be attached upside down to the mounting seat, so even if one of the blades wears or chips, the other blade can still be used.

[0014] In addition, the bucket equipped with the sheet cutting attachment of the present invention may be equipped with a plurality of claw adapters, with the sheet cutting attachment attached to one of the plurality of claw adapters and flat claws attached to the remaining claw adapters.

[0015] According to this configuration, the sheet can be held down by the flat claws, so that the sheet can be prevented from turning up by the flat claws, and the sheet can be easily cut by the sheet cutting blade.

[0016] The sheet cutting method of the present invention further comprises the steps of: A sheet cutting blade is provided at the tip of the bucket, The bucket is placed in the direction of travel of the drag shovel. The bucket is moved forward so that the outer surface of the tip of the bucket is aligned with the sheet laid on the ground surface, and the sheet cutting blade cuts into the sheet, thereby cutting the sheet.

[0017] According to the present invention, the sheet can be pulled and cut by the sheet cutting blade by moving the bucket forward while pressing the sheet with the outer surface of the tip of the bucket. Therefore, unlike conventional push cutting, the sheet can be easily cut by the sheet cutting blade while being pressed down by the bucket.

[0018] In addition, in the present invention, the bucket includes a claw adapter; an attachment body that is detachably fitted onto the nail adapter and has a flat surface on at least one of the inner and outer sides in a side view; a sheet cutting blade formed of a rectangular plate material having two long sides, with a cutting edge formed on at least one of the long sides; a mounting seat provided on the flat surface of the attachment body and configured to detachably clamp and support the sheet cutting blade; The sheet cutting attachment may include:

[0019] According to the present invention, the sheet can be pulled and cut by the sheet cutting blade by moving the bucket forward while pressing the sheet with the outer surface of the tip of the bucket. Therefore, unlike conventional push cutting, the sheet can be easily cut by the sheet cutting blade while being pressed down by the bucket.

[0020] In addition, in the present invention, the bucket includes a plurality of the claw adapters; The sheet cutting attachment is attached to one of the plurality of nail adapters, The remaining nail adapters have flat nails attached. The bucket may be advanced while the flat claws are moved along the surface of the sheet, and the sheet may be cut by the sheet cutting blade.

[0021] According to the present invention, the sheet can be held down by the flat claws, so that the sheet can be prevented from turning up by the flat claws and can be easily cut by the sheet cutting blade.

[0022] In addition, in the present invention, The mounting seat has a plurality of through holes at intervals in a direction along the flat surface, and supports a sheet cutting blade, which also has a plurality of through holes, by fastening the mounting seat with bolts; The sheet cutting blade has a greater number of through holes than the number of through holes in the mounting seat, the through holes being spaced apart in the length direction of the sheet cutting blade, The position of the sheet cutting blade in the front-rear direction may be changed depending on the wear of the sheet cutting blade.

[0023] According to the present invention, since the number of through holes in the sheet cutting blade is greater than the number of through holes in the mounting seat, the sheet cutting blade can be attached to the mounting seat upside down, so that even if the tip of the sheet cutting blade falls off, the base end of the blade can be used.

[0024] In addition, in the present invention, The sheet cutting blade also has a cutting edge on the other long side, The sheet cutting blade may be used by changing its vertical position depending on the wear of the sheet cutting blade.

[0025] According to the present invention, since the other long side of the sheet cutting blade also has a cutting edge, the sheet cutting blade can be attached to the mounting base upside down, so that even if one of the blades of the sheet cutting blade breaks, the other blade can still be used. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is an explanatory diagram showing a drag shovel equipped with a sheet cutting attachment according to an embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram showing a bucket according to the embodiment. [Figure 3] FIG. 2 is an explanatory diagram showing a sheet cutting attachment according to the embodiment. [Figure 4] 4 is an explanatory diagram showing a connection structure between the sheet cutting attachment and the bucket according to the embodiment; FIG. [Figure 5] FIG. 4 is an explanatory diagram showing a flat nail according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] With reference to the drawings, a sheet cutting attachment, bucket, and sheet cutting method according to an embodiment of the invention will be described. Referring to FIG. 1, a sheet cutting attachment 1 according to this embodiment is attached to a bucket 3 of a drag shovel 2 (also called a backhoe). The drag shovel 2 (also called a backhoe) is equipped with tracks 2a, and performs work by moving the bucket 3 in a direction that pulls it toward the machine body. The sheet cutting attachment 1 is used to pull and cut a sheet 5 laid on the ground surface 4.

[0028] The sheet 5 is composed of a nonwoven fabric 5a laid on the ground surface 4 and a water-impermeable sheet body 5b laid on the nonwoven fabric 5a.

[0029] 2, a plurality of claw adapters 3a to which claws can be detachably attached are provided on bucket 3. Sheet cutting attachment 1 is fitted onto the outside of one of claw adapters 3a.

[0030] Referring to Fig. 3, the sheet cutting attachment 1 comprises a cylindrical, bottomed attachment body 11 fitted onto the claw adapter 3a, a sheet cutting blade 13 formed from a rectangular plate having two long sides with cutting edges 13a on each of the long sides, and a mounting seat 15 provided on the attachment body 11 for detachably supporting the sheet cutting blade 13. Referring to Fig. 4, the attachment body 11 comprises a sloped portion 11a extending diagonally downward. In this embodiment, this sloped portion 11a corresponds to the flat portion of the invention. The mounting seat 15 is provided on this sloped portion 11a, and is configured so that the sheet cutting blade 13 extends diagonally downward.

[0031] 3, the mounting seat 15 is configured with a pair of L-shaped members 15a arranged facing each other with a gap between them, and the sheet cutting blade 13 is sandwiched and fixed between the pair of L-shaped members 15a. Each of the pair of L-shaped members 15a has at least two through holes 15b spaced apart along the sloped surface 11a. The sheet cutting blade 13 has four through holes 13b spaced apart in the longitudinal direction. Bolts 17a are inserted through the through holes 15b of the mounting seat 15 and the through holes 13b of the sheet cutting blade 13 and tightened with nuts 17b to sandwich and fix the sheet cutting blade 13 between the pair of L-shaped members 15a.

[0032] 4, the claw adapter 3a is provided with an adapter side hole 3b through which a rubber pin 21 having a plurality of protrusions 21a on its side surface and a lock pin 23 having a recess 23a for receiving the protrusions 21a can be inserted. The base end of the attachment main body 11 is provided with an attachment side hole 11b through which the lock pin 23 can be inserted.

[0033] To attach the sheet cutting attachment 1 to the claw adapter 3a, first, insert the rubber pin 21 into the adapter side hole 3b of the claw adapter 3a. Then, fit the sheet cutting attachment 1 onto the claw adapter 3a. Then, insert the lock pin 23 into the attachment side hole 11b and the adapter side hole 3b, pushing aside the protrusion 21a of the rubber pin 21. The recess 23a of the lock pin 23 then receives the protrusion 21a of the rubber pin 21, preventing the lock pin 23 from falling off. In this way, the sheet cutting attachment 1 is fixed to the claw adapter 3a.

[0034] 5, the remaining nail adapter 3a is fitted with a flat nail 31. The flat nail 31 is composed of a cylindrical flat nail attachment body 33 with a bottom that fits over the nail adapter 3a, and a flat plate portion 35 that protrudes along the bottom surface of the flat nail attachment body 33. The attachment structure of the flat nail 31 to the nail adapter 3a is configured in the same way as the sheet cutting attachment 1.

[0035] To cut the sheet 5 using the sheet cutting attachment 1 of this embodiment, first, the protrusion amount of the sheet cutting blade 13 is adjusted taking into consideration the thickness of the nonwoven fabric 5a and the sheet body 5b, and then the sheet cutting blade 13 is attached to the mounting seat 15. Specifically, if the sheet 5 is relatively thin, the sheet cutting blade 13 is fixed to the mounting seat 15, for example, at the second and third through holes 13b from the tip side. If the sheet 5 is relatively thick, the sheet cutting blade 13 is fixed to the mounting seat 15, for example, at the third and fourth through holes 13b from the tip side.

[0036] Then, the bucket 3 is placed in the traveling direction of the drag shovel 2. At this time, the bucket 3 is placed so that the outer surface of the tip end thereof is aligned with the sheet 5 laid on the ground surface. Since the sheet cutting blade 13 is fixed so as to be aligned with the sloped portion 11a of the attachment body 11, by placing the outer surface of the tip end of the bucket 3 so that it is aligned with the sheet 5 laid on the ground surface, the sheet cutting blade 13 can cut into the sheet 5.

[0037] Then, by moving the bucket 3 in the traveling direction (forward) of the drag shovel 2, the sheet 5 can be cut by the sheet cutting blade 13. Also, since the sheet 5 can be held down by the crawler belt 2 of the drag shovel 2, the sheet 5 can be easily cut by the sheet cutting blade 13. Also, since the flat claws 31 are attached to the claw adapters 3a other than the claw adapter 3a to which the sheet cutting attachment 1 is attached, the flat claws 31 can hold down the sheet 5, so that the flat claws 31 can prevent the sheet 5 from turning up, and the sheet 5 can be easily cut by the sheet cutting blade 13.

[0038] The sheet cutting blade 13 has cutting edges 13a on not only the lower long side but also the upper long side, so when the blade becomes worn or chipped and its sharpness is reduced, the cutting ability can be maintained by switching the blade upside down, and one sheet cutting blade 13 can be used effectively.

[0039] In addition, the sheet cutting blade 13 has four through holes 13b compared to the two through holes 15b in the mounting seat 15. For example, the sheet cutting blade 13 is initially fixed to the mounting seat 15 at the third and fourth through holes 13b from the tip, and when the blade becomes worn or chipped, the sheet cutting blade 13 can be flipped over and fixed to the mounting seat 15 at the first and second through holes 13b, thereby making effective use of the cutting edge 13a on the base end side of the sheet cutting blade 13.

[0040] According to the sheet cutting attachment 1, bucket 3, and sheet cutting method of this embodiment, by moving the bucket 3 forward while pressing the sheet 5 with the outer surface of the tip of the bucket 3, the sheet 5 can be pulled and cut with the sheet cutting blade 13. Therefore, unlike conventional push cutting, the sheet 5 can be easily cut with the sheet cutting blade 13 while holding the sheet 5 with the bucket 3.

[0041] In this embodiment, the bucket 3 is described as having flat claws 31, but the bucket of the invention is not limited to this. For example, normal claws may be attached instead of flat claws. This also makes it possible to press the sheet 5 with the outer surface of the tip of the bucket 3, and to easily cut the sheet 5 with the sheet cutting blade 13.

[0042] In addition, in this embodiment, the sheet cutting blade 13 is described as having four through holes 13b, which is more than the two through holes 15b of the mounting seat 15, but the sheet cutting attachment of the invention is not limited to this, and for example, the number of through holes in the mounting seat and the sheet cutting blade may be the same.

[0043] In addition, in this embodiment, a sheet cutting attachment 1 has been described in which the mounting seat 15 is provided on the inclined portion 11a, but the sheet cutting attachment of the invention is not limited to this, and for example, the mounting seat 15 may be provided on the non-inclined base end flat portion 11c (see Figure 4) on the base end side of the attachment body 11.

[0044] In addition, in this embodiment, the sheet cutting attachment 1 has been described as having the mounting seat 15 provided on the sloped portion 11a on the inside (upper side, right side in Figure 4) of the bucket 3 of the attachment body 11, but the sheet cutting attachment of the invention is not limited to this, and for example, the mounting seat 15 may be provided on the sloped portion or base end flat portion on the outside (lower side, left side in Figure 4) of the bucket 3 of the attachment body 11.

[0045] In addition, in this embodiment, a sheet cutting attachment 1 has been described in which cutting edges 13a are formed on both long sides of the sheet cutting blade 13, but the sheet cutting attachment of the invention is not limited to this, and the cutting edge 13a may be formed on only one of the long sides of the sheet cutting blade 13. [Explanation of symbols]

[0046] 1 Sheet cutting attachment 2 Drag shovel 2a Tracks 3 buckets 3a nail adapter 3b Adapter side hole 4 Ground surface 5 seats 5a Non-woven fabric 5b Seat body 11 Attachment body 11a Slope section (flat section) 11b Attachment side hole 13 Sheet cutting blade 13a cutting edge 13b Through hole 15 Mounting seat 15a L-shaped member 15b Through hole 17a Bolt 17b Nut 21 Rubber Pin 21a Convex part 23 Lock pin 23a Recess 31 flat claw 33 Flat jaw attachment body 35 Flat plate part

Claims

1. The drag shovel is detachably attached to a claw adapter of the bucket in a bucket-equipped drag shovel, A sheet cutting attachment that pulls and cuts a sheet laid on the ground surface, an attachment body fitted onto the claw adapter and having a flat surface on at least one of the inner and outer sides in a side view; a sheet cutting blade formed of a rectangular plate material having two long sides, with a cutting edge formed on at least one of the long sides; a mounting seat provided on the flat surface of the attachment body and configured to detachably clamp and support the sheet cutting blade; A sheet cutting attachment comprising:

2. 2. The sheet cutting attachment according to claim 1, The mounting seat has through holes at multiple locations spaced apart in a direction along the planar portion, and the sheet cutting attachment supports the sheet cutting blade, which also has through holes at multiple locations, by bolting.

3. 3. The sheet cutting attachment according to claim 2, A sheet cutting attachment, characterized in that the sheet cutting blade has a greater number of through holes than the number of through holes in the mounting seat, the through holes being spaced apart in the length direction of the sheet cutting blade.

4. 4. The sheet cutting attachment according to claim 2 or 3, A sheet cutting attachment, wherein the sheet cutting blade also has a cutting edge on the other long side.

5. A bucket equipped with the sheet cutting attachment according to claim 1, The bucket is equipped with multiple claw adapters, The sheet cutting attachment is attached to one of the plurality of claw adapters, The remaining adapters for the tines are fitted with flat tines.

6. A method for cutting a sheet using a drag shovel equipped with a bucket, comprising: A sheet cutting blade is provided at the tip of the bucket, The bucket is placed in the direction of travel of the drag shovel. This sheet cutting method is characterized in that the bucket is moved forward so that the outer surface of the tip of the bucket is aligned with the sheet laid on the ground surface, thereby causing the sheet cutting blade to cut into the sheet and cut the sheet.

7. The sheet cutting method according to claim 6, the bucket includes a claw adapter; an attachment body that is detachably fitted onto the nail adapter and has a flat surface on at least one of the inner and outer sides in a side view; a sheet cutting blade formed of a rectangular plate material having two long sides, with a cutting edge formed on at least one of the long sides; a mounting seat provided on the flat surface of the attachment body and configured to detachably clamp and support the sheet cutting blade; A sheet cutting method comprising the steps of:

8. The sheet cutting method according to claim 7, the bucket includes a plurality of the claw adapters; The sheet cutting attachment is attached to one of the plurality of nail adapters, The remaining nail adapters have flat nails attached. A sheet cutting method, characterized in that the bucket is advanced while the flat claws are aligned along the surface of the sheet, and the sheet is cut by the sheet cutting blade.

9. The sheet cutting method according to claim 7 or 8, The mounting seat has a plurality of through holes at intervals in a direction along the flat surface, and supports a sheet cutting blade, which also has a plurality of through holes, by fastening the mounting seat with bolts; The sheet cutting blade has a greater number of through holes than the number of through holes in the mounting seat, the through holes being spaced apart in the length direction of the sheet cutting blade, A sheet cutting method, characterized in that the position of the sheet cutting blade in the front-to-rear direction is changed depending on wear of the sheet cutting blade.

10. The sheet cutting method according to any one of claims 7 to 9, The sheet cutting blade also has a cutting edge on the other long side, A sheet cutting method, characterized in that the sheet cutting blade is used by changing its up and down position depending on wear of the sheet cutting blade.

Images