CN212164104U

CN212164104U - Garden engineering is with digging tree soil preparation ditching multi-purpose device

Info

Publication number: CN212164104U
Application number: CN201921485896.1U
Authority: CN
Inventors: 田倩倩
Original assignee: Hebei Ranyue Landscape Engineering Co ltd
Current assignee: Hebei Ranyue Landscape Engineering Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-12-18
Anticipated expiration: 2029-09-06

Abstract

The utility model relates to the technical field of garden construction equipment accessories, in particular to a tree-digging, soil-preparation and trenching multipurpose device for garden engineering, which can change the style of the multipurpose device according to the operation requirement so as to reduce the waste of physical strength of workers and improve the working efficiency and the operation convenience; comprises an operating rod and a triangular shovel component; still including adjusting the pole, the fastening threaded rod, fastening nut, the fastening knob, the stopper, the protection slide bar, control threaded rod and control knob, the top right side of adjusting the pole and the bottom left side of action bars are provided with regulating plate and operation panel respectively, the right-hand member of regulating plate and the left end of operation panel run through respectively and are provided with the patchhole and stretch out the hole, the left end of fastening threaded rod passes the patchhole then continues to pass from the right side of regulating plate and stretches out the hole and stretch out to the left side of operation panel, fastening nut and the regional spiral shell dress in left part of fastening threaded rod, the regional inside slip chamber that is provided with in.

Description

Garden engineering is with digging tree soil preparation ditching multi-purpose device

Technical Field

The utility model relates to a garden construction equipment auxiliary device's technical field especially relates to a garden engineering is with digging tree soil preparation ditching multi-purpose device.

Background

As is well known, a tree-digging, land-preparing and trench-digging multipurpose device for garden engineering is a device which can be applied to various garden construction projects such as tree digging, land preparation, trench digging and the like in the garden engineering construction process, and is widely used in the garden engineering construction field; the existing multipurpose device for digging trees, preparing soil and ditching for garden engineering comprises an operating rod and a triangular shovel component, wherein the fixed end at the top of the shovel component is arranged at the bottom of the operating rod; when the multi-purpose device for digging trees, preparing soil and ditching is used in the existing garden engineering, firstly, when a worker needs to dig trees, the multi-purpose device has the function similar to that of a common spade, the worker can dig pits through a triangular spade component by holding an operating rod, so that the root of a sapling can be dug out, and the worker needs to perform soil preparation after digging the pits, namely filling the dug pits, at the moment, the operator can hold the operating rod to push and fill soil into the pits through the side edge of the triangular spade component, and when the worker needs to dig the ditches, the worker can erect the triangular spade component through the operating rod, so that the bottom tip of the triangular spade component can be dug out of the ditches on the ground, and at the moment, the worker can sow the seeds or fertilize in the ditches; present garden engineering is with digging tree soil preparation ditching multi-purpose device use discovery, when the staff carries out the ditching or soil preparation operation through this multi-purpose device, needs to change the posture of handheld action bars and control lever according to the operation mode of triangle spade subassembly, and the more physical power of staff has not only been wasted to this process, and work efficiency is lower moreover, the simple operation nature is relatively poor to lead to the practicality relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a can come the pattern of transform multi-purpose device according to the operation demand to reduce the waste of staff's physical power, can improve work efficiency and improve the simple operation nature moreover, thereby the garden engineering of reinforcing practicality is with digging tree soil preparation ditching multi-purpose device.

The utility model relates to a multipurpose device for digging trees, soil preparation and ditching for garden engineering, which comprises an operating rod and a triangular spade component; the adjustable sliding rod device is characterized by further comprising an adjusting rod, a fastening threaded rod, a fastening nut, a fastening knob, a limiting block, a protective sliding rod, a control threaded rod and a control knob, wherein an adjusting plate and an operating plate are arranged on the right side of the top end of the adjusting rod and the left side of the bottom end of the operating rod respectively, an inserting hole and an extending hole are formed in the right end of the adjusting plate and the left end of the operating plate respectively in a penetrating mode, the left end of the adjusting plate penetrates through the inserting hole from the right side of the adjusting plate and then continues to penetrate through the extending hole and extend to the left side of the operating plate, the fastening nut is screwed with the left area of the fastening threaded rod, the left end of the fastening knob is connected with the right end of the fastening threaded rod, the inner ends of the adjusting plate and the operating plate are tightly attached to each other, a sliding cavity is arranged inside the front, the front end middle part of protection slide bar is provided with the control thread groove, the rear end of control threaded rod passes the penetrating hole then continues to pass the slip hole and the spiral shell dress inserts to the control thread inslot from the front side of stopper, the front end of control knob is connected with the front end of control threaded rod, the rear end of stopper is hugged closely with the front end of adjusting the pole, the bottom middle part of stopper is provided with the constant head tank, triangle spade subassembly includes two sets of rotation triangle spade, the regional inboard bottom region front end fastening riveting with the regulation pole of top of two sets of rotation triangle spade all, the inner of two sets of rotation triangle spade is hugged closely, the top inboard of two sets of rotation triangle spade all is provided with the cambered surface, the top inboard of two sets of rotation triangle spade all hugs closely with the bottom of stopper.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device still includes telescopic link, adjusting threaded rod and adjust knob, the top of action bars is provided with flexible groove, flexible groove and telescopic link slip suit, the right-hand member top intercommunication in flexible groove is provided with adjusting threaded hole, adjusting threaded rod's left end inserts to adjusting threaded hole from the right side spiral shell dress of action bars, adjusting threaded rod's left end is hugged closely with the right-hand member of telescopic link, adjusting knob's left end is connected with adjusting threaded rod's right-hand member.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, the left end of the operation panel of action bars is provided with hexagonal type draw-in groove, hexagonal type draw-in groove and stretch out the hole intercommunication, fastening nut clamps with hexagonal type draw-in groove is fixed.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device still includes two sets of rotation handles, the inner of two sets of rotation handles is connected with the top and the bottom of fastening knob respectively.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device still includes the protective ring, the protective ring is with the regional suit in right part of fastening threaded rod, the left end and the right-hand member of protective ring are hugged closely with the right-hand member of regulating plate and the left end of fastening knob respectively.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, still include antiskid handle cover, the bottom of antiskid handle cover is provided with anti-skidding groove, the suit is fixed with the top of telescopic link in anti-skidding groove.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, the patchhole left end ring type lateral wall of regulating plate evenly is provided with multiunit right side anti-skidding arris, the right-hand member ring type lateral wall that stretches out the hole of operation panel evenly is provided with multiunit left side anti-skidding arris, the meshing of multiunit right side anti-skidding arris and multiunit left side anti-skidding arris.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, fastening knob and control knob's circumference lateral wall all is provided with the multiunit non slipping spur.

Compared with the prior art, the beneficial effects of the utility model are that: when a worker uses the multipurpose device as a shovel, the multipurpose device can be directly used, and when the worker needs to dig a ditch by using the multipurpose device, the worker can firstly rotate the fastening knob to unscrew the fastening threaded rod on the fastening nut, at the moment, the fastening threaded knob and the fastening nut do not extrude and limit the operating plate and the adjusting plate any more, at the moment, the adjusting rod can be forwards rotated to a certain angle, then the fastening threaded rod is screwed on the fastening nut through the fastening knob again, at the moment, the adjusting plate and the operating plate do not rotate relatively any more, at the moment, the multipurpose device becomes a hoe, and the ditching operation is more convenient and labor-saving; when the multipurpose device is used for soil preparation, the control threaded rod can be unscrewed in the control threaded groove of the protective sliding rod through the control knob, the limiting block is not attached to the front end of the adjusting plate any more, then the limiting block slides upwards to the top through the control knob, then the two groups of rotary triangular shovels are respectively rotated ninety degrees outwards, the top ends of the two groups of movable triangular shovels are attached to each other, the bottom ends of the two groups of movable triangular shovels are positioned on the same horizontal plane, the limiting block slides downwards to clamp the top ends of the two groups of rotary triangular shovels into the positioning inner groove, then the control knob drives the control threaded rod to be screwed again, the limiting block bestows the two groups of rotary triangular shovels at the current position, finally, the angle between the operating rod and the adjusting rod is adjusted by changing the multipurpose device into a hoe head, the multipurpose device is changed into a flat scraper, and can be used for leveling land and filling soil for the dug ditch, thereby can come the pattern of transform multi-purpose device according to the operation demand to reduce the waste of staff's physical power, can improve work efficiency and improve the simple operation nature moreover, thereby reinforcing the practicality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of a partially enlarged structure of a;

fig. 3 is a schematic view of the connection structure of the control threaded rod and the protective sliding rod of the present invention;

fig. 4 is a schematic view of the connection structure of the telescopic rod and the operating rod of the present invention;

FIG. 5 is a schematic view of the connection structure of the adjusting lever and the adjusting plate of the present invention;

in the drawings, the reference numbers: 1. an operating lever; 2. adjusting a rod; 3. fastening a threaded rod; 4. fastening a nut; 5. fastening a knob; 6. a limiting block; 7. a protective slide bar; 8. controlling the threaded rod; 9. a control knob; 10. an adjusting plate; 11. an operation panel; 12. a sliding cavity; 13. a cambered surface; 14. a telescopic rod; 15. adjusting the threaded rod; 16. adjusting a knob; 17. a telescopic groove; 18. a hexagonal-shaped neck; 19. two sets of rotating handles; 20. a protective gasket; 21. an anti-slip handle sleeve; 22. a plurality of groups of right anti-slip ribs; 23. a plurality of groups of anti-skid blocks; 24. an insertion hole; 25. an outlet hole; 26. a slide hole; 27. Positioning a groove; 28. adjusting the threaded hole; 29. a through hole; 30. a control thread groove; 31. two sets of rotary triangular shovels.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the utility model discloses a multipurpose device for digging trees, soil, and ditches in garden engineering, which comprises an operating rod 1 and a triangular spade component; the safety protection device comprises an adjusting rod 2, a fastening threaded rod 3, a fastening nut 4, a fastening knob 5, a limiting block 6, a protection slide rod 7, a control threaded rod 8 and a control knob 9, wherein an adjusting plate 10 and an operating plate 11 are respectively arranged on the right side of the top end of the adjusting rod 2 and the left side of the bottom end of the operating rod 1, an inserting hole 24 and an extending hole 25 are respectively arranged at the right end of the adjusting plate 10 and the left end of the operating plate 11 in a penetrating manner, the left end of the fastening threaded rod 3 penetrates through the inserting hole 24 from the right side of the adjusting plate 10, then continuously penetrates through the extending hole 25 and extends to the left side of the operating plate 11, the fastening nut 4 is screwed with the left area of the fastening threaded rod 3, the left end of the fastening knob 5 is connected with the right end of the fastening threaded rod 3, the inner ends of the adjusting plate 10 and the operating plate 11 are tightly attached, a sliding cavity 12, the front end of the limiting block 6 is provided with a penetrating hole 29 in a penetrating manner, the middle part of the front end of the protective sliding rod 7 is provided with a control threaded groove 30, the rear end of the control threaded rod 8 penetrates through the penetrating hole 29 from the front side of the limiting block 6 and then continues to penetrate through the sliding hole 26 and is inserted into the control threaded groove 30 in a screw manner, the front end of the control knob 9 is connected with the front end of the control threaded rod 8, the rear end of the limiting block 6 is tightly attached to the front end of the adjusting rod 2, the middle part of the bottom end of the limiting block 6 is provided with a positioning groove 27, the triangular shovel component comprises two groups of rotating triangular shovels 31, the inner sides of the top areas of the two groups of rotating triangular shovels 31 are fixedly riveted with the front end of the bottom area of the adjusting rod 2, the inner ends of the two groups of rotating triangular shovels 31 are tightly attached, the inner sides of the top ends of the two groups of; when a worker uses the multipurpose device as a shovel, the multipurpose device can be directly used, and when the worker needs to dig a ditch by using the multipurpose device, the worker can firstly rotate the fastening knob to unscrew the fastening threaded rod on the fastening nut, at the moment, the fastening threaded knob and the fastening nut do not extrude and limit the operating plate and the adjusting plate any more, at the moment, the adjusting rod can be forwards rotated to a certain angle, then the fastening threaded rod is screwed on the fastening nut through the fastening knob again, at the moment, the adjusting plate and the operating plate do not rotate relatively any more, at the moment, the multipurpose device becomes a hoe, and the ditching operation is more convenient and labor-saving; when the multipurpose device is used for soil preparation, the control threaded rod can be unscrewed in the control threaded groove of the protective sliding rod through the control knob, the limiting block is not attached to the front end of the adjusting plate any more, then the limiting block slides upwards to the top through the control knob, then the two groups of rotary triangular shovels are respectively rotated ninety degrees outwards, the top ends of the two groups of movable triangular shovels are attached to each other, the bottom ends of the two groups of movable triangular shovels are positioned on the same horizontal plane, the limiting block slides downwards to clamp the top ends of the two groups of rotary triangular shovels into the positioning inner groove, then the control knob drives the control threaded rod to be screwed again, the limiting block bestows the two groups of rotary triangular shovels at the current position, finally, the angle between the operating rod and the adjusting rod is adjusted by changing the multipurpose device into a hoe head, the multipurpose device is changed into a flat scraper, and can be used for leveling land and filling soil for the dug ditch, thereby can come the pattern of transform multi-purpose device according to the operation demand to reduce the waste of staff's physical power, can improve work efficiency and improve the simple operation nature moreover, thereby reinforcing the practicality.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, still include telescopic link 14, adjusting threaded rod 15 and adjust knob 16, the top of action bars 1 is provided with flexible groove 17, flexible groove 17 and telescopic link 14 slip suit, the right-hand member top intercommunication of flexible groove 17 is provided with adjusting threaded hole 28, adjusting threaded rod 15's left end is inserted into adjusting threaded hole 28 from the right side spiral shell dress of action bars 1, adjusting threaded rod 15's left end is hugged closely with telescopic link 14's right-hand member, adjusting knob 16's left end is connected with adjusting threaded rod 15's right-hand member; make adjusting threaded rod no longer spacing to the telescopic link through rotating adjust knob, can change the telescopic link at the flexible inslot's of action bars extension length to satisfy the staff of different operation habits to the user demand of multi-purpose device, adjust after finishing again with adjust knob screw can, thereby reduced the use limitation.

The utility model discloses a multipurpose device for digging trees, preparing soil and ditching for garden engineering, the left end of an operation plate 11 of an operation rod 1 is provided with a hexagonal clamping groove 18, the hexagonal clamping groove 18 is communicated with a stretching hole 25, and a fastening nut 4 is fixedly clamped with the hexagonal clamping groove 18; the adjusting process of the fastening threaded rod is more convenient by clamping the fastening nut into the hexagonal clamping groove, so that the practicability is enhanced.

The utility model discloses a multipurpose device for digging trees, preparing soil and ditching for garden engineering, which also comprises two groups of rotating handles 19, wherein the inner ends of the two groups of rotating handles 19 are respectively connected with the top end and the bottom end of a fastening knob 5; the adjustment of the fastening knob is more labor-saving and convenient through the two groups of rotating handles, so that the practicability is enhanced.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, still include protective washer 20, protective washer 20 and the regional suit in right part of fastening threaded rod 3, the left end and the right-hand member of protective washer 20 respectively with the right-hand member of regulating plate 10 and the left end of fastening knob 5 hug closely; the adjusting plate is protected through the protective washer, the probability that the adjusting plate is damaged by being fastened by the knob is reduced, and therefore the practicability is enhanced.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, still include antiskid handle cover 21, the bottom of antiskid handle cover 21 is provided with anti-skidding groove, anti-skidding groove and the fixed suit in top of telescopic link 14; when having reduced staff's operation multi-purpose device through the antiskid cover, the probability of hand slippage on the telescopic link to reinforcing reliability.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, the patchhole 24 left end ring type lateral wall of regulating plate 10 evenly is provided with multiunit right anti-skidding arris 22, the right-hand member ring type lateral wall of the extension hole 25 of operation panel 11 evenly is provided with multiunit left anti-skidding arris, multiunit right anti-skidding arris 22 and multiunit left anti-skidding arris meshing; the adjusting plate and the operating plate are attached through the plurality of groups of anti-slip ribs, so that the probability of relative sliding after the adjusting plate and the operating plate are fastened is reduced, and the stability is enhanced.

The utility model discloses a multipurpose device for digging trees, preparing soil and ditching for garden engineering, the circumferential side walls of a fastening knob 5 and a control knob 9 are provided with a plurality of groups of anti-skid blocks 23; the roughness of fastening knob or control knob circumference lateral wall has been increased to the multiunit non slipping spur, has reduced when rotating fastening knob or control knob, and the probability that the hand skidded on fastening knob or control knob's lateral wall to the practicality has been strengthened.

The utility model discloses a garden engineering is with digging tree soil preparation ditching multi-purpose device, it is at the during operation, when the staff uses multi-purpose device as the spade, can directly use, and when the staff need use this multi-purpose device to dig the ditch, at this moment can rotate fastening knob at first and come fastening threaded rod to loosen on fastening nut, at this moment fastening thread knob and fastening nut no longer extrude spacing to operation panel and regulating plate, at this moment can rotate the regulation pole forward to certain angle, then screw fastening threaded rod on fastening nut through fastening knob again, at this moment regulating plate and operation panel no longer take place relative rotation, at this moment multi-purpose device has become the hoe, make the operation of digging the ditch more convenient, laborsaving; when the multipurpose device is used for soil preparation, the control threaded rod can be unscrewed in the control threaded groove of the protective sliding rod through the control knob, the limiting block is not attached to the front end of the adjusting plate any more, then the limiting blocks are upwards slid to the top by the control knob, then the two groups of rotating triangular shovels are respectively rotated ninety degrees outwards, at the moment, the top ends of the two sets of the albizzia triangular shovels are tightly attached and the bottoms are on the same horizontal plane, the sliding limiting blocks enable the top ends of the two sets of the rotary triangular shovels to be clamped into the positioning inner grooves, then the control knob is driven to drive the control threaded rod to be screwed, at the moment, the limiting blocks limit the two groups of rotary triangular shovels at the current positions, and finally the angle between the operating rod and the adjusting rod is adjusted by changing the multipurpose device into a hoe, the multipurpose device is changed into a flat scraper at this time, and can be used for leveling the ground and backfilling the dug ditch.

The terms "front", "rear", "left", "right" and the like as used herein are for illustrative purposes only.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A multipurpose device for digging trees, soil preparation and ditching for garden engineering comprises an operating rod (1) and a triangular shovel component; the device is characterized by further comprising an adjusting rod (2), a fastening threaded rod (3), a fastening nut (4), a fastening knob (5), a limiting block (6), a protective sliding rod (7), a control threaded rod (8) and a control knob (9), wherein an adjusting plate (10) and an operating plate (11) are respectively arranged on the right side of the top end of the adjusting rod (2) and the left side of the bottom end of the operating rod (1), an inserting hole (24) and an extending hole (25) are respectively arranged at the right end of the adjusting plate (10) and the left end of the operating plate (11) in a penetrating manner, the left end of the fastening threaded rod (3) penetrates through the inserting hole (24) from the right side of the adjusting plate (10) and then continuously penetrates through the extending hole (25) and extends to the left side of the operating plate (11), the fastening nut (4) is screwed with the left area of the fastening threaded rod (3), and the left end of the fastening knob (5), the adjusting plate (10) is tightly attached to the inner end of the operating plate (11), a sliding cavity (12) is arranged in the front area of the adjusting rod (2), a sliding hole (26) is communicated with the front end of the sliding cavity (12), the protective sliding rod (7) is slidably clamped with the sliding cavity (12), a penetrating hole (29) is arranged at the front end of the limiting block (6) in a penetrating mode, a control threaded groove (30) is arranged in the middle of the front end of the protective sliding rod (7), the rear end of the control threaded rod (8) penetrates through the sliding hole (29) from the front side of the limiting block (6) and then continues to penetrate through the sliding hole (26) and is inserted into the control threaded groove (30) in a screw mode, the front end of the control knob (9) is connected with the front end of the control threaded rod (8), the rear end of the limiting block (6) is tightly attached to the front end of the adjusting rod (2), and a positioning groove (27) is arranged in the middle of, triangle spade subassembly includes two sets of triangle spade (31) that rotate, the regional inboard in top of two sets of triangle spade (31) that rotate all with the regional front end fastening riveting in bottom of adjusting pole (2), the inner of two sets of triangle spade (31) that rotate is hugged closely, the top inboard of two sets of triangle spade (31) that rotate all is provided with cambered surface (13), the top inboard of two sets of triangle spade (31) that rotate all hugs closely with the bottom of stopper (6).

2. The multipurpose device for digging trees and soil preparation and ditching for garden engineering according to claim 1, further comprising a telescopic rod (14), an adjusting threaded rod (15) and an adjusting knob (16), wherein a telescopic groove (17) is formed in the top end of the operating rod (1), the telescopic groove (17) is slidably sleeved with the telescopic rod (14), an adjusting threaded hole (28) is formed in the top of the right end of the telescopic groove (17) in a communicating mode, the left end of the adjusting threaded rod (15) is inserted into the adjusting threaded hole (28) from the right side of the operating rod (1) in a threaded mode, the left end of the adjusting threaded rod (15) is tightly attached to the right end of the telescopic rod (14), and the left end of the adjusting knob (16) is connected with the right end of the adjusting threaded rod (15).

3. The multipurpose device for digging trees and preparing soil and ditching for garden engineering according to claim 2, wherein the left end of the operation plate (11) of the operation rod (1) is provided with a hexagonal clamping groove (18), the hexagonal clamping groove (18) is communicated with the extending hole (25), and the fastening nut (4) is fixedly clamped with the hexagonal clamping groove (18).

4. The multipurpose device for digging trees and preparing soil and ditches for garden engineering according to claim 3, further comprising two sets of rotating handles (19), wherein the inner ends of the two sets of rotating handles (19) are respectively connected with the top end and the bottom end of the fastening knob (5).

5. The multipurpose device for digging trees and soil preparation and trenching for garden engineering according to claim 4, further comprising a protective washer (20), wherein the protective washer (20) is sleeved on the right region of the fastening threaded rod (3), and the left end and the right end of the protective washer (20) are respectively tightly attached to the right end of the adjusting plate (10) and the left end of the fastening knob (5).

6. The multipurpose device for digging trees and preparing soil and ditches in garden engineering according to claim 5, further comprising an anti-slip handle sleeve (21), wherein an anti-slip groove is formed at the bottom end of the anti-slip handle sleeve (21), and the anti-slip groove is fixedly sleeved with the top of the telescopic rod (14).

7. The multipurpose device for digging trees and preparing soil and furrows for garden engineering according to claim 6, wherein the insertion hole (24) of the adjustment plate (10) is uniformly provided with a plurality of sets of right anti-slip ribs (22) on the annular outer side wall of the left end of the insertion hole (24), the operation plate (11) is uniformly provided with a plurality of sets of left anti-slip ribs on the annular outer side wall of the right end of the extension hole (25), and the plurality of sets of right anti-slip ribs (22) are engaged with the plurality of sets of left anti-slip ribs.

8. The multipurpose device for digging trees and soil preparation and ditching for garden engineering according to claim 7, characterized in that the circumferential side walls of the fastening knob (5) and the control knob (9) are provided with a plurality of sets of anti-slip blocks (23).