KR102502301B1 - Chain excavation device with the function of preventing sagging of the excavation chain - Google Patents

Abstract

The present invention relates to a chain excavation device having a sagging prevention function of an excavation chain, and more particularly, when excavating the ground using a chain excavation device, an excavation chain sagging prevention member installed between a chain driver and an upper connection block By pushing the chain driver upward so that the tension of the excavation chain is always maintained, the sagging of the excavation chain in a certain section due to the frictional force generated while resisting the underground soil or rock when the chain excavation arm moves along the moving direction can be reduced. Provided is a chain excavation device having a sagging prevention function of an excavation chain.

Description

Chain excavation device with the function of preventing sagging of the excavation chain}

The present invention relates to a chain excavation device having a sagging prevention function of an excavation chain, and more particularly, when excavating the ground using the chain excavation device, the excavation chain sagging prevention member installed between a chain driver and an upper connection block is a chain excavator. By pushing the driver upward so that the tension of the excavation chain is always maintained, the sagging of the excavation chain in a certain section due to the frictional force generated while resisting the underground soil or rock when the chain excavation arm moves along the direction can be reduced. It relates to a chain excavation device having a function of preventing sagging of an excavation chain.

In general, soil cement underground continuous wall construction using a chain-type cutter is performed by the TRD method (Trench cutting re-mixing deep wall method), and this TRD method is constructed along the excavated ground when excavating the ground with excavation equipment The chain-type cutter of the equipment continuously creates a wall construction space at a certain depth in the ground, and inserts a stress material (e.g., H-beam) tightly into the ground of the wall construction space created in this way to maintain a gap of around 1.0m. , It is to construct a continuous wall by filling the void with gel-like soil cement mixed with soil at the site. (registration date 2004.09.30), Registered Patent Publication No. 10-0476871 (registration date 2005.03.07), Registered Patent Publication No. 10-0953324 (registration date 2010.04.08), Registered Patent Publication No. 10-1360027 (registration date 2014.02.03) ) and Patent Publication No. 10-2009-0036746 (published on April 15, 2009).

In other words, in the TRD method as described above, the construction equipment is designed with a low center of gravity, so the height of the construction equipment is remarkably low, enabling safe construction, high-precision construction, straightness and verticality, high-precision construction, and shortening the construction period. Cost can be reduced due to excellent excavation agitation ability, and because all layers in the vertical direction are mixed and stirred at the same time, different soil quality and excavation depth for each stratum form a homogeneous wall in the transverse direction, and all ground Since the walls are formed up, down, left and right, high continuity and homogeneous wall composition is possible.

The chain drilling device used in the above TRD method is installed on the front side of the rail guide device, as described in Prior Document No. 10-1998180 (pile driver for constructing an underground continuous wall), for example, It is installed to reciprocate and is installed to reciprocate laterally like a transverse moving body. It is an infinite track that excavates the ground while moving around the sprocket installed in the chain driver and the rotating wheel installed at the end of the chain excavation arm. Includes drilling chain.

When the depth of a hole excavated in the ground is to be deepened, such a chain drilling device extends the length of the chain drilling arm by connecting a plurality of connecting blocks vertically.

At this time, the excavation chain is installed surrounding the outside of the chain excavation arm. When the chain excavation arm moves in the direction of travel, the frictional force generated while resisting the underground soil or rock causes the excavation chain to fail to maintain tension and sag for a certain period. This occurs, and the excavation chain sagging for a certain period may be a direct cause of lowering the excavation efficiency and work safety of the chain excavator.

Korean Patent Publication No. 2016-01441343 Korean Registered Patent Publication No. 10-1998180

The present invention has been proposed in consideration of the above conventional problems, and when excavating the ground using a chain excavation device, when the chain excavation rock moves along the moving direction, excavation is performed by frictional force generated while resisting the underground soil or rock. The main purpose is to provide a chain excavation device having a sagging prevention function of an excavation chain so that the chain can prevent or reduce sagging of the chain for a certain period.

One aspect of the present invention is a chain excavator installed to be reciprocating transversely on the front of a rail guide device, comprising: a chain driver with a sprocket installed therein; A chain excavation arm including a plurality of connection blocks extending to a certain length by assembling bolts and nuts, and having a rotating wheel installed in the connection block at the lower end; An endless track excavator excavating the ground while moving around the sprocket and the rotating wheel; And an excavator chain installed to connect the chain driver and the upper connection block, and push the chain driver upward while pushing the sprocket to the uppermost position to maintain the tension of the excavator chain. An excavator chain sagging member; It provides a chain excavation device having a sagging prevention function of an excavation chain comprising a.

In one embodiment of the present invention, the anti-sagging member of the excavator is a pair of springs whose lower end is fixed to the inside of the connection block at the upper end and protrudes upward; a pressing member supported on an upper end of the pair of springs; a hydraulic cylinder having a lower end fixed to the pressing member and extending upwardly; and a fixing piece formed to fix an upper end of the hydraulic cylinder to the inside of the chain driver. In a state in which the hydraulic cylinder and the chain driver connected to the hydraulic cylinder are supported by the elasticity of the spring, the hydraulic cylinder pushes the chain driver upward so that the position of the sprocket is connected to the upper end. It is possible to maintain the tension of the excavation chain by moving away from the block as much as possible.

In one embodiment of the present invention, in the chain excavation arm, a load distributing device is installed at a connection portion where connecting blocks located up and down are connected to each other, so that the load concentrated on the lower end of the chain excavation arm can be temporarily dispersed.

In one embodiment of the present invention, the load distribution device, bolt holes formed on the upper and lower surfaces facing each other of the upper and lower connecting blocks; Elastic body insertion grooves formed at the portion where the bolt hole is formed to have a larger diameter than the bolt hole and open toward opposite directions; and elastic bodies respectively coupled to the elastic body insertion grooves; It may include, and in a state in which the elastic body is coupled to the elastic body insertion groove, the two connecting blocks facing up and down are brought into close contact, and the bolt and nut are fastened so that the two elastic bodies facing up and down are pressed into the bolt hole. The length of the chain excavation arm can be extended while the impact applied to the connecting portion of the connecting block is absorbed by applying elasticity to the connecting portion of the connecting block located up and down.

In one embodiment of the present invention, the chain drilling device may further include a compressed air supply pipe, a cement mortar supply pipe, and a water supply pipe installed from the chain driver to the lower chain excavation arm.

According to one embodiment of the present invention, when excavating the ground using a chain drilling device, the excavating chain sagging member installed between the chain driver and the upper connection block pushes the chain driver upward so that the tension of the excavating chain is always By maintaining it, there is an effect of reducing the phenomenon that the excavation chain sags in a certain section due to the frictional force generated while resisting the underground soil or rock when the chain excavation rock moves along the moving direction.

1 is a front view showing the internal structure of a chain drilling device according to an embodiment of the present invention in perspective.
Figure 2 is a perspective view showing a partial perspective of the internal structure of the chain drilling device according to an embodiment of the present invention.
3 is a cross-sectional view showing a structure in which an upper connection block and a chain driver are connected through an excavation chain sagging member in a chain excavator according to an embodiment of the present invention, and a structure in which a load distributing device and two upper and lower connection blocks are connected. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below.

In addition, 'include' a component throughout the specification means that other components may be further included, rather than excluding other components unless otherwise stated.

1 is a front view showing the internal structure of a chain drilling device according to an embodiment of the present invention in perspective, Figure 2 is a perspective view showing a partial perspective of the internal structure of a chain drilling device according to an embodiment of the present invention, 3 is a cross-sectional view showing a structure in which an upper connection block and a chain driver are connected through an excavating chain sagging member in a chain excavator according to an embodiment of the present invention, and a structure in which a load distributing device and two upper and lower connection blocks are connected.

The chain drilling device of the present invention is installed to be reciprocating transversely on the front of the rail guide device. 1 to 3, this chain drilling device includes a chain driver 100 in which a sprocket 110, which is one support shaft of an excavation chain 250, is installed, a chain excavation arm, and an excavation chain 250 of an endless track. ) and a sagging prevention member, which is an excavator.

In addition, the chain excavation apparatus of the present invention may further include a compressed air supply pipe 262, a cement mortar supply pipe 263, and a water supply pipe installed from the chain driver 100 to the lower end of the chain excavation arm. In FIG. 1, reference numeral 264 denotes a union joint for fixing the compressed air supply pipe 262 and the cement mortar supply pipe 263 to the connection block 210.

The chain excavation arm includes a plurality of connection blocks 210, 220, and 230 extending to a certain length required for excavation in the vertical direction by assembling bolts 241 and nuts 242, and at this time, the upper connection block 210 is connected to the chain driver 100, the connecting block 230 at the end of the rotation wheel 233, which is the opposite support shaft of the excavation chain 250, is installed.

The excavation chain 250 is coupled with a plurality of excavation blades 251 to the outside thereof. The excavating chain 250 serves to excavate the ground while rotating around the sprocket 110 and the rotating wheel 230 in an endless track using the sprocket 110 and the rotating wheel 233 as both support shafts. In addition, the excavation chain 250 is inserted into the chain guide guide groove 225 formed in the longitudinal direction of the connecting blocks 210, 220, and 230 constituting the chain excavation arm, and thus only a part of the excavation chain 250 is installed. may be exposed to the outside.

The excavator chain sagging prevention member is installed between the chain driver 100 and the upper connection block 210 in a structure connecting the chain driver 100 and the upper connection block 210 to each other, and the chain driver 100 The tension of the excavation chain 250 is always maximized by maximizing the moving trajectory of the excavation chain 250 by continuously pushing upward so that the position of the sprocket 110, which is one support shaft of the excavation chain 250, is located at the top. play a role in maintaining

The bottoming prevention member, which is an excavator, includes a pair of first and second springs 320, a pressing member 330, a hydraulic cylinder 342, and first and second fixing pieces 341 and 343. In addition, the connection block 210 at the top is in a state where the first horizontal support plate 310 is fixedly installed on the inside of the upper part, and the lower ends of the first and second springs 320 are supported on the first horizontal support plate 310, respectively. It is fixed.

The first and second springs 320 are installed side by side at predetermined intervals in the left and right directions, and protrude upwards, respectively, with their lower ends supported by the first horizontal support plate 310 . In addition, first and second spring shafts 321 may be further provided so as to pass through the center of the first and second springs 320 and have upper and lower ends protruding through the upper and lower ends of the switch V, respectively. At this time, first and second shaft fitting holes 310a are formed in the first horizontal support plate 310, and lower ends of the first and second spring shafts 321 are formed in the first and second shaft fitting holes 310a, respectively. It is inserted so that the first and second springs 320 can be stably coupled on the first horizontal support plate 310 while preventing the flow.

The pressing member 330 is installed to be supported on the upper ends of the first and second springs 320 . These pressing members 330 include first and second horizontal pressing plates 331 disposed at predetermined intervals in the left and right directions and pressing upper ends of the first and second springs 320, respectively, and first and second horizontal pressing plates. It consists of a support bracket including first and second vertical portions 332 extending downwardly from 331 and horizontal portions 333 connecting lower ends of the first and second vertical portions 332 to each other. can Accordingly, the pressing member 330 can be regarded as a structure capable of finely moving up and down by the elasticity of the first and second springs 320 .

At this time, the third and fourth shaft fitting holes 331a are formed in the first and second horizontal press plates 331, respectively, and the first and second springs 320 are formed in the third and fourth shaft fitting holes 331a. The upper ends of the first and second spring shafts 321 protruding through the upper ends may be coupled to each other. In addition, the space between the first and second vertical parts 332 may be a space for installing the hydraulic cylinder 331.

The lower end of the hydraulic cylinder 342 is fixed to the horizontal part 333 between the first and second vertical parts 332 and is installed to be able to move upwards and downwards. At this time, a first fixing piece 341 may be provided on the horizontal portion 333 so that the lower end of the hydraulic cylinder 342 is fixed. And, the second fixing piece 350 is fixedly formed inside the chain driver 100 so that the upper end 343 of the hydraulic cylinder 342 is fixed. At this time, a second horizontal support plate 351 may be installed inside the chain driver 100 to install the second fixing piece 350 thereon.

At this time, the upper end of the connection block 210 on the upper side is in close contact with the hollow part opened to the lower side of the chain driver 100 and is fitted into the form, so that the chain driver 100 and the connection block 210 on the upper side are in close contact with each other. are combined

In this state, the load of the chain driver 100 is the first and second springs 320 acting relatively while the above-described pressing member 330 presses the first and second springs 320 fixed to the connection block 210 at the top. It becomes a structure supported by the elasticity of the spring 320.

In this state, when the hydraulic cylinder 342 is operated and moved up and down, the upper end 343 of the hydraulic cylinder 342 pushes the second horizontal support plate 351 coupled to the second fixing piece 350 upward, and thus The chain driver 100, in which the second horizontal support plate 351 is installed, is also pushed upward, and the sprocket 110 is positioned at the top within a possible range. The tension of the excavation chain 250 can always be maintained.

Therefore, when excavating the ground using a chain drilling device, the moving trajectory of the excavating chain 250 is maximally extended, so that the tension of the excavating chain 250 is always maintained, so that the chain excavating arm moves along the moving direction. When moving, it is possible to prevent or reduce a phenomenon in which the excavation chain 250 sags in a certain section due to frictional force generated while resisting the underground soil or rock.

On the other hand, such an excavator, the anti-sag member 234 may be installed between the lower connecting block 230 and the upper connecting block 220, if necessary. In this case, the excavator chain sagging prevention member 234 pushes the lower connection block 220 downward so that the rotating wheel 233 maintains the position as lowered as possible to the lower side, thereby maintaining the tension of the excavator chain 250 can be further improved.

Here, since the structure of the sagging prevention member, which is an excavation structure installed at the bottom, is similar to that of the excavation structure sagging prevention member installed in the chain driver described above, a detailed description thereof will be omitted in order to avoid redundancy.

In addition, a load distributing device may be installed in the connection portion of the plurality of connection blocks 210, 220, and 230 of the chain excavation arm. The load distributing device may serve to temporarily distribute the load concentrated on the lower end of the chain excavation arm.

As shown in FIG. 3, this load distribution device has bolt holes 212 and 222 formed on the upper and lower surfaces of the plurality of connection blocks 210 and 220 facing each other, respectively, and formed on the respective bolt holes 212 and 222. It may include elastic body insertion grooves 213 and 223 and elastic bodies 215 and 225 coupled to each of the elastic body insertion grooves 213 and 223 one by one. At this time, the elastic body may be a spring, and the present invention is not limited thereto.

The elastic body insertion grooves 213 and 223 are formed on the upper or lower surfaces of the connection blocks 210 and 220 where the bolt holes 212 and 222 are formed, and the bolt holes 212 so that the elastic bodies 215 and 225 can be inserted. , 222) and are formed to open toward opposite directions. Accordingly, the connection block 210 located at the top is coupled with the elastic body 215 so as to protrude upward to the elastic body insertion groove 213, and the connection block 220 located at the bottom is coupled to the elastic body to protrude downward to the elastic body insertion groove 223. (225) is combined.

Then, in a state in which the elastic bodies 215 and 225 are coupled one by one to the elastic body insertion grooves 213 and 223 in this way, the two connecting blocks 210 and 220 facing each other up and down are brought into close contact, and the connection blocks 210 and 220 Through the bolt fastening grooves 211 and 221 formed at both ends of the elastic body insertion grooves 213 and 223 and the bolt holes 212 and 222 to pass through the elastic bodies 215 and 225 coupled therein, and When the nut 242 is fastened, the bolt 241 presses the upper elastic body 215 and the two connection blocks 210 and 220 are connected to each other while the nut 242 presses the lower elastic body 225, and the chain The length of the excavation rock can be extended.

According to this structure, since the upper and lower connecting blocks 210 and 220 are closely coupled with the springs, which are elastic bodies 215 and 225, accommodated on the surfaces in contact with each other, the lower end of the excavation chain 250 touches the rock and no longer When progress is difficult, the connection block at the bottom is temporarily tilted. At this time, the connection block is restored and absorbs the impact applied to the connection part of the connection block, thereby improving work safety.

The present invention is not limited by the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims. Therefore, various forms of substitution, modification, and change will be possible by those skilled in the art within the scope of the technical spirit of the present invention described in the claims, which also falls within the scope of the present invention. something to do.

100: chain driver 110: sprocket
210, 220, 230: connection block 212, 222: bolt hole
213, 223: elastic body insertion groove 215, 225: elastic body
233: rotation wheel 241: bolt
242: nut 250: excavation chain
262: compressed air supply pipe 263: cement mortar supply pipe
310: first horizontal support plate 320: spring
330: pressing member 342: hydraulic cylinder
350: second fixing piece 351: second horizontal support plate

Claims (5)

In the chain excavation device installed transversely and reciprocally on the front of the rail guide device,
A chain driver 100 in which the sprocket 110, which is one support shaft of the excavation chain 250, is installed inside;
It includes a plurality of connection blocks (210, 220, 230) extending to a certain length required for excavation along the vertical direction by assembling bolts 241 and nuts 242, and the upper connection block 210 is a chain driver. Chain excavation arm connected to (100), in which a rotation wheel 233, which is a support shaft opposite to the excavation chain 250, is installed in the connection block 230 at the end;
The sprocket 110 and the rotating wheel 233 are used as both supporting shafts to excavate the ground while rotating around the sprocket 110 and the rotating wheel 230 in an endless track, Connecting blocks constituting the chain excavation arm (210, 220, 230) is inserted into the chain guide guide groove 225 formed in the longitudinal direction so that only a part of the drilling chain 250 is exposed to the outside; and
It is installed between the chain driver 100 and the upper connection block 210 in a structure that connects the chain driver 100 and the upper connection block 210 to each other, and continuously pushes the chain driver 100 upward. Prevention of drooping of excavator chain 250 so that the tension of excavator chain 250 is always maintained by maximizing the movement trajectory of excavator chain 250 by placing the sprocket 110, which is one support shaft of excavator chain 250, at the top. absence; As having,
The sagging prevention member, which is the excavator,
A pair of first and second springs 320, the lower end of which is fixed inside the connection block 210 at the upper end, and protrudes upward;
a pressing member 330 supported on the upper end of the pair of first and second springs 320;
A hydraulic cylinder 342 having a lower end fixed to the pressing member 330 and extending upwardly; and
first and second fixing pieces 341 and 343 formed to fix an upper end of the hydraulic cylinder to the inside of the chain driver 100; At the same time including
The hydraulic cylinder 342 operates in a state in which the hydraulic cylinder 342 and the chain driver 100 connected to the hydraulic cylinder 342 are supported by the elasticity of the pair of first and second springs 320. The chain driver 100 is pushed upward so that the position of the sprocket 110 is as far away as possible from the connection block 210 at the top so that the tension of the excavation chain 250 is maintained,
The chain excavation rock is also
A load distributing device is installed at the connection part of the connecting blocks 210 and 220 located up and down, so that the load concentrated on the lower end of the chain excavation arm is temporarily dispersed,
The load distribution device,
Bolt holes 212 and 222 formed on the upper and lower surfaces facing each other of the upper and lower connection blocks 210 and 220; Elastic body insertion grooves 213 and 223 formed at the portion where the bolt holes 212 and 222 are formed to open toward opposite directions with a diameter larger than that of the bolt holes 212 and 222; and elastic bodies 215 and 225 coupled to the elastic body insertion grooves 213 and 223, respectively; including,
In a state where the elastic bodies 215 and 225 are coupled to the elastic body insertion grooves 213 and 223, the two connection blocks 210 and 220 facing each other are brought into close contact with each other, and the bolt holes 212 and 222 vertically Fasten the bolt 241 and the nut 242 so that the two facing elastic bodies 215 and 225 are pressed so that the elasticity acts on the connection part of the two connecting blocks 210 and 220 facing up and down, so that the facing up and down Chain drilling device having a function of preventing sagging of the excavation chain, characterized in that the length of the chain excavation arm is extended while the shock applied to the connection of the two connecting blocks (210, 220) is absorbed. delete delete delete According to claim 1,
The chain drilling device further includes a compressed air supply pipe 262, a cement mortar supply pipe 263, and a water supply pipe installed from the chain driver 100 to the lower chain excavation arm. Chain drilling rig with functions.

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