Pre-strike device for drawing

Abstract

The present invention relates to a pre-impact device for extraction, and more specifically, to an extraction targeting device that can be installed on equipment such as an excavator, by striking the upper surface of an object to be extracted, such as a steel pipe, H-beam, or other structural steel pile buried underground, before extraction to remove foreign substances such as soil, earth, and concrete attached to the outer surface of the object to be extracted underground, thereby improving the efficiency of the extraction operation and offsetting vibrations and noise generated during striking. To this end, the present invention comprises: a body that extends in the longitudinal direction and has an internal lifting space, and has an inlet at the bottom that communicates with the lifting space for the object to be extracted to be inserted; a striking body that is arranged to be movable up and down within the lifting space and strikes the upper surface of the object to be extracted to separate foreign substances, including hardened soil, earth, and concrete, from the outer surface of the object to be extracted; a noise absorber disposed between the object to be extracted and the striking body to offset noises and vibrations generated during striking by the striking body; and a device disposed on the upper surface of the object to be extracted that transmits the striking force of the striking body to the object to be extracted. The apparatus comprises a striking plate for transmission, a lifting cylinder provided in the body for raising the striking body, and a locking means provided in the body for restricting the lowering of the striking body during movement or transport, wherein the locking means comprises a fastening hole formed on the outer surface of the body and having a fastening spiral on its inner circumference, and a locking pin that engages with and connects to the fastening hole.

Description

Technology Field

[0001] The present invention relates to a pre-impact device for extraction, and more specifically, to an extraction shooting impact device that can be installed on equipment such as an excavator, by striking the upper surface of an object to be extracted, such as a steel pipe, H-beam, or other structural steel pile buried underground, before extraction to remove foreign substances such as soil, earth, and concrete attached to the outer surface of the object underground, thereby improving the efficiency of the extraction operation and offsetting vibrations and noise generated during impact. Background Technology

[0002] Generally, steel pipes or H-beams are buried deep underground during the earth retaining and foundation work processes at construction sites, and a extraction device is used to retrieve them after the process is completed.

[0003] Most of these pulling devices are constructed by installing a pressurizing means on the rod of a movable cylinder positioned opposite the structural steel pile, operating the pressurizing means to apply pressure to both sides or the center of the structural steel pile, and then pulling the structural steel pile, which has been pressurized by the pressurizing means, upward through the upward movement of a lifting cylinder.

[0004] However, during the period of burial, soil, sediment, and inflowed concrete frequently harden and become integrated on the outer surface of the object to be extracted, which causes a problem where smooth extraction is difficult using only the lifting force of the extraction device.

[0005] In addition, there were problems such as the time required for the entire civil engineering work increasing as the buried object could not be removed or the time required to remove it increased during the extraction process, and when the object was struck from the side to separate it from the ground, it caused lateral effects on the ground compacted by the foundation work, thereby inducing cracks in the ground.

[0006] Furthermore, since vibrations and noise generated during the process of striking the objects to be extracted are transmitted not only to the construction site but also to the surrounding areas, there was a problem where complaints regarding noise and vibration frequently occurred when the construction site was located in an urban area.

[0007] Conventional drawing devices had problems such as unstable drop control of the striking body, a high risk of device damage, insufficient safety devices to prevent the arbitrary drop of the striking body during movement, difficulty in replacing and aligning the striking force transmission part, and excessive vibration being transmitted to the device body and support equipment during impact transmission. Prior art literature

[0008] Republic of Korea Registered Patent No. 10-1082942 (Registered Nov. 07, 2011) Republic of Korea Registered Patent No. 10-2178354 (Registered Nov. 05, 2020) The problem to be solved

[0009] The present invention is proposed to solve the above problems and aims to provide a pre-impact device for drawing that reduces impact noise and vibration by placing a noise absorber between the object to be drawn and the impact body, and effectively limits the descent of the impact body during movement through a locking means consisting of a fastening hole and a locking pin.

[0011] In addition, the present invention aims to provide a pre-impact device for drawing, which is equipped with a lowering adjustment unit for raising a striking body by a lifting cylinder and then allowing it to free-fall, and which blocks the excessive transmission of impact generated during impact to the outside of the body through an impact offsetting means.

[0013] In addition, the present invention aims to provide a pre-impact device for extraction that is configured to be installed on an excavator, allowing it to be utilized even in relatively narrow terrain and to shorten the overall construction period due to its ease of movement. means of solving the problem

[0014] To achieve the above objective, the present invention comprises: a body that extends in the longitudinal direction and has a lifting space provided inside, and has an inlet provided at the bottom that communicates with the lifting space and is used to introduce a drawing object;

[0015] A striking body positioned to be movable up and down in the above lifting space, which strikes the upper surface of the object to be extracted to separate foreign substances including hardened soil, earth, and concrete from the outer surface of the object to be extracted;

[0016] A noise absorber provided between the above-mentioned object to be drawn and the above-mentioned striking body to offset noise and vibration generated when struck by the above-mentioned striking body;

[0017] A striking plate disposed on the upper surface of the object to be drawn and transmitting the striking force of the striking body to the object to be drawn;

[0018] A lifting cylinder provided in the above body to raise the above striking body;

[0019] It includes a locking means provided on the body to restrict the descent of the striking body during movement or transport; and

[0020] The above-mentioned catch means is,

[0021] A fastening hole formed on the outer surface of the above body and having a fastening screw provided on the inner surface, and

[0022] It is characterized by including a locking pin that engages and connects with the above-mentioned fastening hole.

[0024] In addition, the body is characterized by comprising a lower tube formed in a cylindrical shape having a predetermined diameter and having an inlet to limit the lifting position of the noise absorber and the impact plate, and an upper tube formed to have a smaller diameter than the lower tube and provided at a position spaced above the lower tube.

[0026] Additionally, the body is further provided with an impact-canceling means for canceling out the impact generated during the process in which the striking body strikes the object to be drawn, and the impact-canceling means comprises: an upper bar made of square blocks; a support bar made of square blocks, with a pair arranged spaced apart from each other, positioned spaced below the upper bar, and having one side fixed to the outer surface of the body; a vibration-canceling bar formed in the shape of a rod extended in the longitudinal direction, installed to penetrate the upper bar and the support bar, fixedly coupled to the upper bar, and installed to be movable up and down from the support bar; a detachment-prevention nut coupled to the lower end of the vibration-canceling bar to prevent it from detaching from the support bar; and a cushioning spring arranged to surround the outer surface of the vibration-canceling bar, with one end positioned to contact the bottom surface of the support bar and the other end positioned to contact the detachment-prevention nut to elastically support the vibration-canceling bar downward.

[0028] Additionally, the body is further provided with a lowering adjustment unit for adjusting the lowering of the striking body, wherein the lowering adjustment unit operates after the striking body is raised to a predetermined height by the raising cylinder to fix the position of the striking body, and is released after the raising cylinder returns to its original position, thereby allowing the striking body to free fall. Effects of the invention

[0029] The present invention, constructed as described above, has the effect of improving the drawing efficiency of the object to be drawn by stably controlling the free fall of the striking body and thereby improving the striking efficiency.

[0031] In addition, the present invention has the effect of improving safety by preventing the risk of accidental falling of a striking body during transportation and movement through a locking means.

[0033] In addition, the present invention controls the rising and falling positions of the impact plate and the noise absorber to prevent eccentricity in the impact position, fully transmits the impact force of the impact body to the object to be drawn, and offsets the noise and vibration generated during impact, thereby preventing the transmission of vibration and noise to the construction site and its surroundings.

[0035] Furthermore, the present invention can be coupled to an excavator, allowing it to be used at various construction sites where the excavator can move, thus offering high versatility. Additionally, it has the advantage of being detachable from the excavator, making maintenance and replacement easy. Brief explanation of the drawing

[0036] FIG. 1 is an exemplary diagram illustrating a pre-impact device for drawing according to the present invention. FIG. 2 is a cross-sectional view illustrating the interior of a pre-impact device for drawing according to the present invention. FIG. 3 is a cross-sectional view illustrating a body constituting the present invention. FIG. 4 is an exemplary diagram illustrating a rising cylinder constituting the present invention. FIG. 5 is an exemplary diagram illustrating an impact offsetting means constituting the present invention. FIGS. 6 to 8 are state diagrams illustrating the operating state of the present invention. Specific details for implementing the invention

[0037] In addition to the above objectives, other objectives and features of the present invention will become apparent through the description of embodiments with reference to the accompanying drawings.

[0039] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0041] Hereinafter, a preferred embodiment of a pre-impact device for drawing according to the present invention will be examined in detail with reference to the attached drawings.

[0042] First, the pre-impact device (1) for drawing according to the present invention comprises: a body (10) that is extended in the longitudinal direction and has a lifting space (14) provided inside, and has an inlet (111) at the bottom that communicates with the lifting space (14) and is provided for the drawing object to be drawn in; a striking body (20) that is arranged to be movable up and down in the lifting space (14) and strikes the upper surface of the drawing object to separate foreign substances including hardened soil, earth, and concrete on the outer surface of the drawing object; a noise absorbing body (30) provided between the drawing object and the striking body (20) to cancel out noise and vibration generated when struck by the striking body (20); a striking plate (40) that is placed on the upper surface of the drawing object and transmits the striking force of the striking body (20) to the drawing object; a lifting cylinder (50) provided in the body (10) to raise the striking body (20); and the device provided in the body (10) to move or transport during the process It includes a locking means (60) that limits the downward movement of the striking body (20).

[0044] The above body (10) is formed in the shape of a tube extended in the longitudinal direction and has a lifting space (14) provided inside, which provides a space where the striking body (20), described later, moves up and down and collides with the object to be pulled and the striking body (20), and provides a space where the upper part of the object to be pulled is inserted.

[0046] The body (10) for this purpose comprises a lower tube (11) which is formed in a cylindrical shape having a predetermined diameter and has an inlet (111) to limit the lifting position of the noise absorber and the impact plate, and an upper tube (12) which is formed to have a relatively smaller diameter than the lower tube (11) and is positioned above the lower tube (11).

[0048] The lower tube (11) is formed in a cylindrical shape having a predetermined diameter and is configured so that both ends in the longitudinal direction are open, and the opening at the bottom is provided with an inlet (111) into which the object to be drawn is introduced.

[0049] The lower tube (11) is formed to have a relatively larger diameter than the upper tube (12) described later, and a step is formed at the entrance (111) of the lower tube (11) so that the noise absorber (30) and the impact plate (40) placed inside are caught on the step, thereby preventing them from escaping to the outside through the lower tube (11).

[0050] The upper tube (12) is formed to have a relatively smaller diameter compared to the lower tube (11) and is provided at a position spaced above the lower tube (11) to provide a lifting space (14) through which the striking body (20), described later, rises and falls.

[0051] At this time, a lifting groove (122) is provided on the outer surface of the upper tube (12) and extends along the longitudinal direction. The lifting groove (122) guides the seating rod (21) provided in the striking body (20) described later when it moves up and down. Additionally, a packing (not shown) may be provided in the lifting groove (122) to reduce noise generated by friction with the seating rod (21).

[0052] In addition, the upper tube (12) is further provided with a coupling module (not shown) for coupling with an excavator.

[0054] The striking body (20) is positioned to be movable up and down in the lifting space (14) and strikes the upper surface of the object to be pulled out to separate foreign substances, including soil, earth, and concrete, that have hardened on the outer surface of the object to be pulled out.

[0055] This striking body (20) is formed in the shape of a metal rod having a predetermined weight, and its bottom surface is formed flat to strike the noise absorber (30) described later.

[0056] Here, the weight of the striking body (20) can be applied as long as it can deliver an appropriate impact to the object to be drawn, and for example, it can be made of a metal rod with a weight of 1 to 2 tons, but is not limited thereto.

[0057] And on the outer surface of the striking body (20), a landing rod (21) is provided that is positioned in a lifting groove (122) formed in the upper tube (12) and moves up and down. The landing rod (21) is formed in the shape of a rod extending horizontally from the outer surface of the striking body (20), and at least one pair is provided at mutually symmetrical positions.

[0059] The above noise absorber (30) is provided between the object to be drawn and the striking body (20) to offset the noise and vibration generated when struck by the striking body (20).

[0060] The noise absorber (30) for this purpose is made of a material having its own elastic restoring force and is formed to have a predetermined thickness, and is formed to be identical in shape and size to the impact plate (40) described later and is placed on the upper surface of the impact plate (40).

[0061] Here, as an example of a material constituting the noise absorber (30), it may be a mixture of one or more of high-density urethane foam, rubber, felt, and fibrous materials, and in addition to the aforementioned materials, any material capable of reducing noise and having its own elastic recovery force may be applied.

[0063] The striking plate (40) is positioned on the upper surface of the object to be drawn and transmits the striking force of the striking body (20) to the object to be drawn, so that the upper surface of the object to be drawn, which is drawn in through the inlet (111) of the lower pipe (11), comes into contact with the lower surface of the striking plate (40).

[0064] The rim of the impact plate (40) catches on the step formed at the entrance (111) of the lower tube (11), thereby preventing the impact plate (40) from detaching from the lower tube (11) even if the object to be drawn out is detached through the entrance (111).

[0065] The above-mentioned impact plate (40) is formed in the shape of a flat plate and is formed to have a predetermined thickness, and is made of a metal material having a predetermined strength and thickness to minimize damage caused by impact from the impact body (20), thereby transmitting the impact force transmitted from the impact body (20) to the object to be pulled in contact.

[0067] The above-mentioned lifting cylinder (50) is operated by an applied power source and signal to raise the striking body (20) to a predetermined height, and a pair of them are provided on the outer surface of the body (10) at mutually spaced positions, each including a body (51), a rod (52) positioned to be accessible from the body (51), and a 'U'-shaped mounting hole (53) provided at the tip of the rod (52) with an open top so that the mounting rod (21) can be mounted thereon.

[0068] The above-mentioned rising cylinder (50) raises the rod (52) to move the striking body (20) upward after the settling rod (21) is settled in the settling hole (53), and returns to the original position when the position of the raised striking body (20) is fixed by the lowering adjustment unit (80) described later.

[0069] This lifting cylinder (50) stably raises a striking body (20) having a predetermined weight, and raises the striking body (20) while the landing rod (21) of the striking body (20) is stably seated in a landing hole (53) that is open at the top and formed in a 'L' shape so as to prevent the striking body (20) from falling arbitrarily during the raising process.

[0071] The above-mentioned locking means (60) is provided on the body (10) to prevent the striking body (20) from falling off during movement or transport, and includes a fastening hole (61) formed on the outer surface of the body (10) and having a fastening spiral on its inner circumference, and a locking pin (62) that engages with and connects to the fastening hole (61).

[0072] The above fastening hole (61) is formed penetrating from the outer surface of the body (10) toward the inside, and a fastening spiral is formed on the inner surface so that a locking pin (62) is fastened and separated.

[0073] The above-mentioned locking pin (62) has a fastening spiral formed on its outer surface and engages with the fastening hole (61) to be connected or disconnected, and in the connected state, a portion is positioned inside the body (10) to press the outer surface of the raised striking body (20), thereby preventing the striking body (20) from falling off.

[0074] Here, one or more of the above-mentioned catch means (60) may be arranged radially along the outer surface of the body (10), and the number of arrangements and the spacing between them are adjusted according to the outer diameter of the body (10) and the weight of the striking body (20).

[0076] Meanwhile, the body (10) is further provided with an impact cancellation means (70) that cancels out the impact generated during the process in which the striking body (20) strikes the object to be pulled out. The impact cancellation means (70) comprises an upper bar (71) made of square blocks, a pair of square blocks arranged spaced apart from each other, a support bar (72) positioned spaced apart from the lower part of the upper bar (71) and having one side fixed to the outer surface of the body (10), a vibration cancellation bar (73) formed in the shape of a rod extended in the longitudinal direction and installed to penetrate the upper bar (71) and the support bar (72), fixedly coupled to the upper bar (71), and installed to be movable up and down on the support bar (72), a detachment prevention nut (74) coupled to the lower end of the vibration cancellation bar (73) to prevent detachment from the support bar (72), and arranged to surround the outer surface of the vibration cancellation bar (73). It includes a cushioning spring (75) that is positioned so as to be in contact with the bottom surface of the support bar (72) at one end and positioned so as to be in contact with the anti-detachment nut (74) at the other end, thereby elastically supporting the vibration canceling bar (73) downward.

[0078] The above shock offset means (70) is intended to prevent the position and verticality of the body (10) from changing due to the impact generated during the process in which the striking body (20) strikes the object to be pulled out.

[0079] The upper bar (71) for this purpose is formed in the shape of a block having a predetermined length and thickness, and the upper part of the vibration canceling bar (73) is fixed. Here, the upper bar (71) is illustrated as having a pair symmetrically arranged above the body (10), but this is one embodiment and they may be arranged radially with a gap between them.

[0080] The support bar (72) is provided at a position spaced apart from the lower part of the upper bar (71) by a predetermined height, with one end integrally fixed to the outer surface of the upper tube (12) by welding, and a through hole is provided through which the vibration canceling bar (73) is inserted so as to be movable up and down.

[0081] At this time, one or more of the support bars (72) may be spaced apart from one another, and when one or more are spaced together, they may be fixed as a single unit through a separate connecting plate (721). By connecting the connecting plate (721) to the outer surface of the body (10) through a connecting means such as a connecting bolt, the support bars (72) can be easily replaced if damage occurs.

[0082] The above vibration canceling bar (73) is formed in the shape of a circular rod extending in the longitudinal direction and is installed to penetrate the upper bar (71) and the support bar (72), and is fixedly coupled to the upper bar (71) and installed to be movable up and down on the support bar (72).

[0083] And a nut (74) for preventing detachment is placed at the bottom of the vibration damping bar (73) to prevent the vibration damping bar (73) from detaching from the support bar (72).

[0084] The above buffer spring (75) is positioned to surround the outer surface of the vibration canceling bar (73), with one end positioned to contact the bottom surface of the support bar (72) and the other end positioned to contact the anti-detachment nut (74), thereby elastically supporting the vibration canceling bar (73) downward. This offsets the vibration and shock that occur when the body (10) moves up and down due to the impact force transmitted from the striking body (20) to the object to be pulled out, thereby maintaining the position and verticality of the body (10) and minimizing the transmission of vibration and shock to the excavator to which the body (10) is attached.

[0086] Meanwhile, the body (10) is further provided with a lowering adjustment unit (80) for adjusting the lowering of the striking body (20), and the lowering adjustment unit (80) operates after the striking body (20) is raised to a predetermined height by the rising cylinder (50) to fix the position of the striking body (20), and is released after the rising cylinder (50) returns to its original position, thereby allowing the striking body (20) to free fall.

[0087] That is, after the striking body (20) is raised to a predetermined height by the above-mentioned rising cylinder (50), the raised position is maintained through the lowering adjustment unit (80), and time is obtained to return the rising cylinder (50) to its original position, thereby preventing the rising cylinder (50) from being damaged by vibration and impact generated during striking.

[0088] This lowering adjustment unit (80) may be composed of a hydraulic cylinder that operates by an authorized power source and signal, but is not limited thereto.

[0090] As described above, the present invention has been explained by specific details such as specific components, limited embodiments, and drawings; however, this is provided merely to aid in a more comprehensive understanding of the invention, and the invention is not limited to the above embodiments. A person skilled in the art can make various modifications and variations from this description.

[0092] Accordingly, the scope of the present invention should not be limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept of the present invention. Explanation of the symbols

[0094] 1 : Pre-impact device for drawing 10 : Body 11: Lower pipe 12: Upper pipe 14 : Elevator space 111 : Entrance 122 : Platform 20 : Striking body 21 : Landing bar 30 : Noise absorber 40 : Striking plate 50 : Rising cylinder 51 : Body 52 : Load 53 : Settlement 60 : means of obstruction 61 : Fastening hole 62 : Locking pin 70 : Shock-canceling means 71 : Upper bar 72 : Support bar 73 : Vibration dampening bar 74 : Anti-detachment nut 75 : Buffer spring 721 : Connection board 80 : Lowering adjustment unit

Claims

Claim 1 A body (10) that extends in the longitudinal direction and has a lifting space (14) provided inside, and has an inlet (111) at the bottom that communicates with the lifting space (14) for drawing in a target object; a striking body (20) that is arranged to move up and down in the lifting space (14) and strikes the upper surface of the target object to separate foreign substances including hardened soil, earth, or concrete on the outer surface of the target object; a noise absorbing body (30) that is arranged between the target object and the striking body (20) to cancel out noise and vibration generated when struck by the striking body (20); a striking plate (40) that is arranged on the upper surface of the target object to transmit the striking force of the striking body (20) to the target object; a lifting cylinder (50) provided in the body (10) to raise the striking body (20); a locking means (60) provided in the body (10) to restrict the lowering of the striking body (20) during movement or transport; and the The device includes an impact cancellation means (70) that cancels out the impact generated during the process of the striking body (20) striking the object to be pulled out; and a lowering adjustment unit (80) provided in the body (10) to adjust the lowering of the striking body (20), wherein the body (10) is formed in a cylindrical shape having a predetermined diameter and includes a lower tube (11) having an inlet (111) to restrict the upward movement of the noise absorber (30) and the striking plate (40), and an upper tube (12) formed with a smaller diameter than the lower tube (11) and spaced apart from the upper part of the lower tube (11) to guide the lifting of the striking body (20), and the locking means (60) includes a fastening hole (61) formed on the outer surface of the body (10) and having a fastening screw on the inner circumference.The lowering adjustment unit (80) includes a locking pin (62) that is screw-coupled to the above-mentioned fastening hole (61) to selectively restrict the lowering of the striking body (20), and the impact offsetting means (70) includes an upper bar (71) in the shape of a square block, a pair of support bars (72) spaced apart from the lower part of the upper bar (71) and having one side fixed to the outer surface of the body (10), a vibration offsetting bar (73) fixed to the upper bar (71) and installed to be movable up and down through the support bar (72), a detachment prevention nut (74) coupled to the lower end of the vibration offsetting bar (73), and a cushioning spring (75) arranged to surround the outer surface of the vibration offsetting bar (73), having one end supported by the support bar (72) and the other end supported by the detachment prevention nut (74) to elastically support the vibration offsetting bar (73), and the lowering adjustment unit (80) includes the A pre-impact device for drawing, characterized by supporting the striking body (20) to maintain its position after it has been raised to a predetermined height by a rising cylinder (50), allowing the rising cylinder (50) to return to its original position while the striking body (20) is supported, and releasing the support of the striking body (20) to allow it to free fall after the rising cylinder (50) has returned to its original position. Claim 2 delete Claim 3 delete Claim 4 delete

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