KR101989795B1 - Tapping machine - Google Patents

Abstract

The present invention relates to a tapping device, which is implemented to effectively control the movement of an object to be processed caused by processing even during repetitive tapping processing, comprising: a processing unit tapping and processing an object to be processed which is mounted.

Description

[0001] TAPPING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping device, and more particularly, to a tapping device that can efficiently control the movement of a workpiece during a repeated tapping process.

In general, the tapping machine is a device for forming a female thread in a machined hole inner diameter, which is machined through a tap having an outer diameter corresponding to the pre-machined hole inner diameter and a predetermined pitch on the outer circumference.

The tapping machine includes a single-tap tapping machine using a single tap for machining an inner diameter of a hole formed in a workpiece, and a multi-axis tapping machine having a plurality of tabs for simultaneously machining a plurality of holes formed in the workpiece, .

Among the tapping machines classified into the short axis and the multi axis according to the machining process, the multi-axis tapping machine is widely used because it cuts the work time and reduces the manpower.

In the conventional tapping machine, a driving motor for realizing the rotational force of the tab and the upward and downward reciprocating motion is interposed above the frame, and a tap for transmitting the rotational force of the driving motor to the tap, A plurality of shafts are connected upright.

As described above, at the tip end of the tap shaft connected to the drive motor, a joint having a predetermined pitch is formed and a tab interposed therebetween is rotatably interposed. Also, a joint is formed between the tab and the joint so that the uprightness of the tab according to the joint displacement can be ensured.

However, the conventional tapping device does not have any other means for supporting the workpiece during the tapping process, and it is disadvantageous that it is difficult to perform precise tapping when the driving force due to tapping is applied to the workpiece by moving the workpiece .

On the other hand, the background art described above is technical information acquired by the inventor for the derivation of the present invention or obtained in the derivation process of the present invention, and can not necessarily be a known technology disclosed to the general public before the application of the present invention .

Korean Registered Utility Model No. 20-0302851 Korean Registered Utility Model No. 20-0360301

One aspect of the present invention provides a tapping device that can efficiently control the movement of a workpiece in accordance with processing even in repetitive tapping using a frame provided on both sides of the tab.

The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

A tapping apparatus according to an embodiment of the present invention includes a processing unit for tapping and processing a mounted workpiece.

In one embodiment of the present invention, the apparatus further includes a mounting unit installed on one side or both sides of the processing unit to mount the processing member so that the tapped workpiece is horizontally horizontal, the processing unit including: a main body forming an outer shape; A support provided below the main body to support the main body so as to be spaced apart from the ground; A tapping part installed vertically inside the body part, the lower part of the tapping part being vertically driven to tap and process the workpiece; A tapping control unit connected to the tapping unit by wire or wireless and receiving a control of driving the tapping unit from a user; And a discharge unit installed on the lower side of the main body to discharge a piece of the workpiece tapped by the tapping unit, the main body having a cylindrical shape and having the tapping unit installed in the inner space; A tapping space which is recessed in a rear end direction from a lower portion of the body to form a space for disposing a workpiece; A tapping lathe formed at a front end entrance portion of the tapping space and having a portion to be tapped in the workpiece; And a through hole for vertically passing through the tapping shelf and discharging a piece of the work piece tapped and separated in a downward direction, the discharge portion extending from a lower side of the tapping shelf, The tapping unit is installed in the inner space of the body and receives hydraulic pressure from the outside using a hydraulic hose. The driving shaft is vertically reciprocated using the hydraulic pressure A driving unit; A tab provided below the drive shaft and moving together with the downward movement of the drive shaft to tap and process the workpiece; And two support frames spaced apart from both sides of the tab and pressing and supporting the workpiece so that the workpiece does not move during the tapping process, So that the workpiece is prevented from moving on the tapping lathe when the tapping process is performed and the support frame is also moved upward together with the tapping movement so that the workpiece is separated from the tapping space, And a moving type lifting device installed on a lower side of the processing part and having a hydraulic jack for lifting or lowering the processing part in an upward direction and a downward direction and the moving type lifting device having the hydraulic jack is provided with a moving means And at least one column whose length is variable on the upper surface is arranged A lower frame; An upper frame supported by the at least one post and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame for moving up and down the upper frame by using an external force provided by a user to move up and down an object placed on the upper frame, A main body in which an inner cylinder and a lifting piston are disposed; A pressure piston provided outside the main body and communicating with the main body to maintain a closed state, and a pressure piston is formed inside the main body, and when the pressure piston is lowered after the working fluid is sucked as the pressure piston rises, An outer cylinder for providing a working fluid to the inner cylinder; A pressure lever connected to the pressure piston disposed inside the outer cylinder to transmit an external force provided by the user to the pressure piston; And a release valve releasing the pressure of the inner cylinder according to an operation of a user to cause the working fluid introduced into the inner cylinder to be recovered to the main body, wherein the outer cylinder is provided in a plurality of outer cylinders, Comprises a first outer cylinder formed along a central axis coaxial with the pressure lever and at least one second outer cylinder disposed about the diameter of the first outer cylinder, the first outer cylinder and the at least one second cylinder The sum of the diameters of the first and second outer cylinders is equal to or less than 1/3 of the diameter of the inner cylinder and the first outer cylinder and the at least one second outer cylinder are connected to each other through a suction pipe The hydraulic jack is connected to the main body, and the hydraulic jack is formed on the first outer cylinder and the at least one second outer cylinder Selectively opening and closing a number of the suction pipe may further include a control means for varying the strength W of the pressure piston.

According to one aspect of the present invention, by using a frame installed on both sides of the tab, it is possible to efficiently control the movement of the workpiece in accordance with the process even in the repeated tapping process, thereby preventing the workpiece from moving during tapping, Thereby providing an effect of improving the precision of machining.

1 is a view showing a schematic configuration of a tapping apparatus according to an embodiment of the present invention.
2 is a diagram showing a schematic configuration of a tapping apparatus according to another embodiment of the present invention.
Fig. 3 is a view showing the machining unit of Fig. 2. Fig.
FIG. 4 is a view showing the main body of FIG. 3. FIG.
5 is a view showing the tapping unit of FIG.
6 and 7 are views for explaining a processing method of the workpiece by the tapping portion of FIG.
FIG. 8 is a diagram showing a schematic configuration of a tapping apparatus according to another embodiment of the present invention.
FIG. 9 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to an embodiment of the present invention.
10 is a perspective view showing a specific configuration of the hydraulic jack shown in Fig.
11 is a conceptual diagram for explaining the internal construction and operation principle of the hydraulic jack shown in Figs. 9 and 10. Fig.
12 is a view showing an outer cylinder and a connecting portion.
13 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to another embodiment of the present invention.
14 to 16 are perspective views illustrating a hydraulic jack according to another embodiment of the present invention.
17 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to another embodiment of the present invention.
18 is a view showing the elastic support portion of Fig.
19 and 20 are views showing the support pillars of Fig.
FIG. 21 is a view showing the cross-elastic portion of FIG. 19; FIG.
22 is a view showing the vertical elastic part of Fig.
FIG. 23 is a view showing the load distribution unit of FIG. 17;

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a view showing a schematic configuration of a tapping apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a tapping apparatus 10 according to an embodiment of the present invention includes a processing unit 200.

The machining portion 200 is provided on a supporter 800 formed by a plurality of frames formed in a vertical or horizontal direction and processes the workpiece by tapping.

Here, the support platform 800 can be replaced by the movable lifting devices 20, 30, 40 equipped with the hydraulic jacks described later in Fig.

The machining unit 200 according to this nickname is an apparatus for performing machining to make a hole in a workpiece by using a drilling machine or the like. If the apparatus is capable of tapping, Can be applied without.

2 is a diagram showing a schematic configuration of a tapping apparatus according to another embodiment of the present invention.

Referring to FIG. 2, the tapping apparatus 10a according to an embodiment of the present invention includes a mounting portion 100 and a processing portion 200. Here, since the machining portion 200 is the same as the constituent elements in Fig. 1, a description thereof will be omitted.

The mounting part 100 is formed by a plurality of bars, and the processing part 200 is placed in a space between the mounting parts so that the processing part can be horizontal left and right.

In the case of FIG. 2, two mounting portions 100 are provided. However, the number of the mounting portions 100 is not limited to the number of the mounting portions 100, and may be more or less depending on factors such as the number, volume, or weight of the workpiece.

The tapping apparatus 10a having the above-described structure efficiently controls the movement of the workpiece in accordance with the process even in repetitive tapping using frames provided on both sides of the tabs, thereby preventing the workpiece from moving during tapping It is possible to improve the precision of machining by tapping.

Fig. 3 is a view showing the machining unit of Fig. 2. Fig.

3, the processing unit 200 includes a main body 210, a supporting unit 220, a tapping unit 230, a tapping control unit 240, and a discharging unit 250.

The main body 210 includes a tapping part 230 formed in the inner space formed in the vertical direction and having a supporting part 220 provided at the lower part and spaced apart from the ground, And a discharge unit 250 is installed on the lower side.

The support portion 220 is installed on the lower side of the main body 210 to support the main body 210 so as to be spaced apart from the ground.

The tapping portion 230 is installed in the vertical direction inside the body portion 210 and the lower side is driven in the vertical direction to tap the workpiece to process (i.e., punch holes).

The tapping control unit 240 is connected to the tapping unit 230 in a wired or wireless manner and receives control of driving the tapping unit 230 from the user.

The discharge unit 250 is disposed below the main body 210 and is tapped by the tapping unit 230 to discharge the separated work piece.

In one embodiment, the discharge portion 250 is formed by extending a portion of the work piece extending from the lower side of the tapping shelf 213 (see Fig. 4) through the through hole 214 (see Fig. 4) (260).

At this time, the lower part of the discharge part 250 or the entire body is formed in the form of a corrugated pipe, so that the pieces of the workpiece can be guided to the defrag cylinder 260 according to the user's needs.

FIG. 4 is a view showing the main body of FIG. 3. FIG.

Referring to FIG. 4, the main body 210 includes a body 211, a tapping space 212, a tapping shelf 213, and a through hole 214.

The body 211 is formed in a cylindrical shape, and a tapping portion 230 is provided in the inner space, and a tapping space 212 is formed so that a workpiece can be disposed at a lower portion.

At this time, the body 211 is formed in a cylindrical shape whose lower portion is cut in half so that the tapping space 212 is formed, so that the workpiece can be positioned regardless of the size or the volume of the workpiece.

The tapping space 212 is recessed from the lower portion of the body 211 toward the rear end to form a space in which the workpiece is disposed.

At this time, the tapping space 212 may be formed as a semi-circular space as shown in FIG. 4, or may be a polygonal space such as a triangle or a square corresponding to the size or shape of the workpiece .

The tapping shelf 213 is formed in a front end entrance portion of the tapping space 212 and is formed in a plane so that a portion to be tapped in the workpiece can be placed thereon and a piece of the workpiece to be tapped and separated is discharged in a downward direction A through hole 214 penetrating downward is formed at a portion where the work piece is separated.

The through hole 214 is formed by vertically penetrating the tapping shelf 213 to drop a piece of the workpiece that has been tapped and separated in the downward direction to be discharged into the defrag cylinder 260 through the discharge portion 250 .

5 is a view showing the tapping unit of FIG.

5, the tapping part 230 includes a driving part 231, a tab 232, and two support frames 900.

The driving unit 231 is installed in the inner space of the body 211 and receives hydraulic pressure from the outside using a hydraulic hose 233 (see FIG. 4), and vertically reciprocates the driving shaft using the hydraulic pressure.

That is, the driving unit 231 reciprocates in the cylinder so as to generate an efficient linear reciprocating motion of the tab 232 and a sufficient driving force for drilling the workpiece, It is preferably formed as a hydraulic piston,

The driving unit 231 moves the support frame 900 in the downward direction when the tab 232 is moved downward so that the workpiece is prevented from moving on the tapping shelf 213 during tapping The support frame 900 is also moved upward so that the workpiece is separated from the tapping space 212 when the tab 232 is moved upward.

The tab 232 is provided under the drive shaft of the drive unit 231 and moves together with the downward movement of the drive shaft to tap and process the workpiece and the tab 232 corresponds to the type of tapping And may be formed into various shapes.

The support frame 900 is spaced apart from both sides of the tab 232 and presses and supports the workpiece so that the workpiece does not move during the tapping process.

In one embodiment, the support frame 900 may be formed as a flat frame as shown in FIG. 5, but may also be formed as a flat frame, as shown in FIG. 6 below, Structure.

A processing method of the workpiece by the tapping part 230 having the above-described structure will be described with reference to FIG.

2) When the tab 232 and the supporting frame 900 are moved downward together by the driving force of the driving unit 231, 6 (b)), and 3) the hole is pierced (Fig. 6 (b)). In this case, the support frame 900 is pressed so as not to move during processing of the workpiece, When the process is completed, the tab 232 and the support frame 900 are moved upward together to allow the workpiece to be separated from the tapping space 212.

Next, referring to Fig. 7, the process of drilling the hole of the workpiece by the tab 232 will be described. First, the workpiece is placed on the tapping lathe 213 (Fig. 7 (a) 2) The tab 232 is moved downward by the driving force of the driving unit 231 (Fig. 7 (b)), and 3) a driving force of a threshold value sufficient to punch the workpiece is applied by the driving unit 231 to the tab 232 ), The tab 232 penetrates the workpiece and creates a hole.

The tapping portion 230 having the above-described structure can efficiently control the movement of the workpiece in accordance with the process even in the repeated tapping process using the two support frames 900 installed on both sides of the tab 232, It is possible to prevent the workpiece from moving during the tapping process, thereby improving the accuracy of the process according to the tapping.

FIG. 8 is a diagram showing a schematic configuration of a tapping apparatus according to another embodiment of the present invention.

Referring to FIG. 8, the tapping device 10b according to another embodiment of the present invention includes a moving part 20, 30, 40 having a processing part 200 and a hydraulic jack. Here, since the machining portion 200 is the same as the constituent elements in Fig. 1, a description thereof will be omitted.

And is provided on the lower side of the processing part 200 to raise or lower the processing part 200 in the upward direction or in the downward direction.

The tapping apparatus 10b having the above-described configuration not only improves the work efficiency of the operator by adjusting the height of the processing unit 200 in the vertical direction according to the height of the worker, By adjusting the height of the machining portion 200 in the vertical direction, it is possible to improve the precision of the work by increasing the tapping accuracy of the workpiece.

FIG. 9 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to an embodiment of the present invention.

The portable lifting apparatus 20 provided with the hydraulic jack may include a lower frame 310, an upper frame 320, and a hydraulic jack 400.

The lower frame 310 is a member constituting the lower surface of the movable lifting device 20. [ The lower portion of the lower frame 310 is provided with a moving means 330, so that the movable lifting device 20 equipped with the hydraulic jack according to the present invention can ensure mobility.

At least one post 340 may be disposed on the upper surface of the lower frame 310.

As shown in the figure, the pillars 340 may be provided at four corners of the lower frame 310, but the number of the pillars 340 is not limited.

The column 340 may be provided in a shape in which the length can be varied. For example, the column 340 may include an outer column having a first diameter and an inner column having a diameter smaller than the first diameter, and inserted into the outer column and sliding along the longitudinal direction of the outer column. In this case, when the inner column slides in the direction of insertion into the outer column, the entire length of the column 340 is shortened, and if the inner column slides in the direction protruding from the outer column, the overall length of the column 340 may increase. However, it is needless to say that the column 340 is not limited to the above-described configuration and can be replaced with other conventional structures as long as the length can be varied by an external force.

The upper frame 320 may be supported from the lower frame 310 by at least one column 340 and disposed in parallel with the lower frame 310. When the length of the column 340 is increased, the upper frame 320 moves up and down from the ground while the upper frame 320 Is lifted up.

The hydraulic jack 400 is a device that provides the column 340 with a lifting force. The hydraulic jack 400 is installed between the lower frame 310 and the upper frame 320 and adjusts the length of the column 340 by using an external force provided by a user in order to raise / The upper frame 320 can be raised and lowered. In this regard, the description will be made with reference to FIGS. 10 to 12 together.

FIG. 10 is a perspective view showing a specific configuration of the hydraulic jack 400 shown in FIG. 9, and FIG. 11 is a conceptual diagram for explaining an internal configuration and a working principle of the hydraulic jack 400 shown in FIG. 9 and FIG.

Specifically, the hydraulic jack 400 according to one embodiment of the present invention includes a main body 410, an outer cylinder 420, a press lever 430, and a release valve 440.

The main body 410 is a cylindrical member, and a space in which a working fluid can be stored is formed, and an inner cylinder 411 and an elevating piston 412 can be disposed therein.

The inner cylinder 411 is a cylindrical member formed inside the main body 410. A working fluid may be stored between the main body 410 and the inner cylinder 411. [

The lifting piston 412 is a member provided on the inner cylinder 411 and reciprocating along the longitudinal direction of the inner cylinder 411. That is, when the working fluid is supplied to the inner cylinder 411, the lifting piston 412 is lifted by the pressure of the working fluid and the length of the column 340 is increased. As a result, the lifting piston 412 is brought into contact with the upper portion of the lifting piston 412 The upper frame 320 can rise from the ground.

The outer cylinder 420 is a member for supplying fluid to the inner cylinder 411 and may be connected to the main body 410 through a fastening bracket 415 so as to maintain the sealed state with the main body 410. A pressure piston 421 is formed inside the pressure piston 421 and the pressure piston 421 can be raised or lowered by the pressure lever 430.

The pressure lever 430 is connected to the pressure piston 421 and transmits the external force provided by the user to the pressure piston 421.

12 is a view showing an outer cylinder 420 constituting the hydraulic jack 400 and a connecting portion 422 for engaging the pressurizing piston 421 and the pressurizing lever 430 of the outer cylinder 420, The pressure piston 421 formed inside the piston 420 is physically coupled to the pressure lever 430 through the connection portion 422. Due to such a structural feature, the pressure piston 421 is pressed by the pressure lever 430, An external force can be delivered.

The press lever 430 is formed with a through hole for engaging a member such as a pipe or the like that can be held by the user. The user moves the pipe up and down in a state where the pipe is coupled to the press lever 430 An external force may be applied to the pressure lever 430. [ In another embodiment of the present invention, the pressure lever 430 may include the pipe described above or may be provided integrally with the pipe.

A specific operation principle of the hydraulic jack 400 according to an embodiment of the present invention is as follows. When a user pushes the pressing lever 430 in a state where an object to be raised by the hydraulic jack 400 is seated on the upper frame 320 A negative pressure is formed in the outer cylinder 420 while the pressure piston 421 is lifted. Accordingly, the working fluid stored between the main body 410 and the inner cylinder 411 can flow into the outer cylinder 420 along the suction pipe 451.

Thereafter, when the user presses the pressure lever 430, the pressure piston 421 descends and applies pressure to the working fluid sucked into the outer cylinder 420. Thus, the working fluid sucked into the outer cylinder 420 can move to the inner cylinder 411 along the supply pipe 452. [ At this time, a check valve is provided at one end of the suction pipe 451 connected to the outer cylinder 420 so that the working fluid can be fed only along the supply pipe 452. The lift piston 412 rises by the pressure of the working fluid flowing into the inner cylinder 411. As the pressure of the inner cylinder 411 gradually increases, the lift piston 412 gradually rises, and the lift piston 412 is gradually lifted up by the pressure of the lift piston 430. As a result, 412) to lift the object placed on the top.

The release valve 440 is formed at one end of the supply pipe 452 and is a valve-shaped member for releasing the pressure of the inner cylinder 411 according to the user's operation. That is, when the user desires to lower the object to its original position, when the release valve 440 is opened, the high-pressure filled working fluid flowing into the inner cylinder 411 receives the gravity of the object through the recovery pipe 530 The pressure of the lifting piston 412 is returned to the main body 410 and the pressure of the inner cylinder 411 is lowered so that the lifting piston 412 is lowered by the gravity of the object and the object can descend to the original position .

As described above, the hydraulic jack 400 according to the embodiment of the present invention can lift or lower heavy objects by using a small force repeatedly applied from the user to the pressure lever 430. [

Meanwhile, in another embodiment of the present invention, the user can adjust the magnitude of the pressure provided to the lifting piston 412 according to the type of object and the type of work to be performed. In this connection, the description will be made with reference to FIGS. 13 to 16 together.

13 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to another embodiment of the present invention.

Specifically, the portable lifting apparatus 30 provided with the hydraulic jack according to another embodiment of the present invention includes a lower frame 310, an upper frame 320, and a hydraulic jack 400a.

In this case, the lower frame 310 and the upper frame 320 constituting the movable lifting device 30 having the hydraulic jack according to another embodiment of the present invention shown in FIG. The lower frame 310 and the upper frame 320 constituting the portable lifting apparatus 20 provided with the hydraulic jacks according to the present embodiment are the same as those of the lower frame 310 and the upper frame 320, and a repeated description thereof will be omitted.

Meanwhile, a portable lifting device 30 having a hydraulic jack according to another embodiment of the present invention is a portable lifting device 20 having a hydraulic jack shown in FIG. 9, 400 may be replaced with a hydraulic jack 400a according to another embodiment of the present invention. In this connection, the description will be made with reference to Figs. 14 to 16 together.

14 to 16 are perspective views illustrating a hydraulic jack 400a according to another embodiment of the present invention.

Fig. 14 is a perspective view of a hydraulic jack 400a according to another embodiment of the present invention, Fig. 15 is a view comparing external cylinders constituting the hydraulic jack 400a of Fig. 14, Fig. 16 is a cross- 400a in accordance with an embodiment of the present invention.

The hydraulic jack 400a according to another embodiment of the present invention includes a main body 410, outer cylinders 420a, 420b, 420c, 620d, 620e, 620f, a press lever 430, and a release valve 440 .

The main body 410, the press lever 430 and the release valve 440 constituting the hydraulic jack 400a according to another embodiment of the present invention shown in FIG. The pressurizing lever 430 and the release valve 440 constituting the hydraulic jack 400 according to the embodiment of the present invention will be omitted.

The hydraulic jack 400a according to another embodiment of the present invention may include a plurality of outer cylinders 420 shown in FIG. That is, in the hydraulic jack 400a according to another embodiment of the present invention, a plurality of outer cylinders 420a, 620b, 420c, 420d, 420e, 420f, and 420g may be connected to the pressure lever 430. [ 13, the hydraulic jack 400a according to another embodiment of the present invention includes six outer cylinders 420b, 420c, and 420c around a first outer cylinder 420a formed along a central axis coaxial with the press lever 430, 420d, 420e, 420f, and 420g are arranged along the circumference of the first outer cylinder 420a. However, the present invention is not limited thereto, and the number of the outer cylinders is not limited to two or more.

Each of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g is provided in a cylindrical shape, and a pressure piston is formed therein. That is, when the user applies an external force to the hydraulic jack 400a by operating the pressure lever 430, the pressure lever 430 transmits the external force to the external cylinders 420a, 420b, 420c, 420d, 420e, 420f, 420g ).

When the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are designed to have the same diameter, they are transmitted to the respective outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g Can be uniformly dispersed. As another example, when the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are designed to have different diameters, the external force can be distributed and transmitted in proportion to the size of the diameter.

The total sum of diameters of all the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g constituting the hydraulic jack 400a may be designed to be smaller than the diameter of the inner cylinder 411, The sum of the diameters of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, 420g is preferably less than 1/3 of the diameter of the inner cylinder 411. [ When the diameter of the outer cylinder is larger than the diameter of the inner cylinder 411, a force smaller than the magnitude of the external force applied to the outer cylinder can be transmitted to the inner cylinder 411.

A specific operation principle of the hydraulic jack 400a according to another embodiment of the present invention will be described with reference to FIG.

16, the hydraulic jack 400a according to another embodiment of the present invention is shown to include three outer cylinders 420a, 420b, and 420c. However, as described above, FIG. In a conceptual view for explaining the operation principle, the case where two external cylinders or four or more external cylinders are provided may be the same as or similar to the operation principle described later.

When the user lifts the pressure lever 430 in a state where the hydraulic jack 400a is in contact with an object at a lower portion of the object to be raised, the pressure pistons 421a, 421b, and 421c of the outer cylinders 420a, 420b, and 420c A negative pressure is formed in the outer cylinder 420. [ Accordingly, the working fluid stored between the main body 410 and the inner cylinder 411 can flow into the outer cylinders 420a, 420b and 420c along the suction pipes 451a, 451b and 451c.

Thereafter, when the user presses the pressure lever 430, the pressure pistons 421a, 421b, and 421c descend and apply pressure to the working fluid sucked into the outer cylinders 420a, 420b, and 420c. Accordingly, the working fluid sucked into the outer cylinders 420a, 420b, and 420c can move to the inner cylinder 411 along the supply pipes 452a, 452b, and 452c. The lift piston 412 rises by the pressure of the working fluid flowing into the inner cylinder 411. As the pressure of the inner cylinder 411 gradually increases, the lift piston 412 gradually rises, and the lift piston 412 is gradually lifted up by the pressure of the lift piston 430. As a result, 412) to lift the object placed on the top.

The hydraulic jack 400a according to another embodiment of the present invention controls the opening and closing of the shutoff valves 4511a, 4511b and 4511c and the shutoff valves 4511a, 4511b and 4511c installed at one end of the suction pipes 451a, 451b and 451c And may further include control means (not shown).

Control means (not shown) may be provided in the form of a control circuit disposed inside the fastening bracket 415, and may be electrically connected to the shutoff valves 4511a, 4511b, and 4511c. In this case, the control means (not shown) can open / close the shutoff valves 4511a, 4511b and 4511c in accordance with the user's operation.

The above formula (1) is a formula representing the force W exerted on the lifting piston 412. The lifting force W applied to the lifting piston 412 is a force acting on the lifting piston 412 against the diameter D of the lifting piston 412 The sum of the diameters d of the pistons 421a, 421b and 421c and the external force w applied to the pressure pistons 421a, 421b and 421c.

That is, when the user transmits a certain amount of external force w through the pressure lever 430 to the hydraulic jack 400, the lifting force of the lifting piston 412 is transmitted to the pressure piston 412 against the diameter D of the lifting piston 412 421a, 421b, and 421c, respectively. Here, the diameter D of the lifting piston 412 is determined according to the diameter of the inner cylinder 411, and the sum d of the diameters of the pressure pistons 421a, 421b and 421c is equal to the sum of the outer cylinders 420a, 420b and 420c The upward force W applied to the lifting piston 412 is determined by the ratio of the diameters of the outer cylinders 420a, 420b and 420c to the diameter of the inner cylinder 411 Can be varied.

Accordingly, the hydraulic jack 400a according to another embodiment of the present invention can selectively open / close the shutoff valves 4511a, 4511b, and 4511c by control means (not shown) It is possible to adjust the amount of the working fluid to be introduced and to increase the strength of the lifting piston 412 by applying pressure to the working fluid only through the pressure pistons 421a, 421b and 421c with the shutoff valves 4511a, 4511b and 4511c being opened .

For example, when only the first shut-off valve 4511a is closed in response to the user's control means (not shown), the external force applied to the working fluid acts when all the shut-off valve valves 4511a, 4511b and 4511c are opened Only two-thirds of the external force w applied to the fluid can be delivered. In other words, according to the control of the control means (not shown), the diameter of the outer cylinders 420a, 420b, and 420c is varied to control the lifting force W of the lifting piston 412, The lifting height of the hydraulic jack 400 according to one operation of the pressure lever 430 can be adjusted according to the type of object to be lifted or the type of work to be performed after the object is lifted.

In some other embodiments, the control means (not shown) may automatically determine the shutoff valve valves 4511a, 4511b, 4511c to be opened or closed.

For example, the control means (not shown) may only open one shutoff valve valve 4511a, 4511b, 4511c until the pressure lever 430 is operated a predetermined number of times from the initial operation time of the hydraulic jack 400a, It is possible to control the plurality of shutoff valve valves 4511a, 4511b, and 4511c to be opened from the time when the pressure lever 430 is operated more than the predetermined number of times. More specifically, the control means (not shown) allows only the first shut-off valve 4511a to be opened until the first presser lever 430 is operated five times, and until the pusher lever 430 is operated six to ten times The first shutoff valve 4511a and the second shutoff valve 4511b are opened and all the shutoff valves 4511a, 4511b and 4511c are opened from 11 times or more. In general, when the object is lifted using the hydraulic jack 400a, there are not many kinds of operations that can not be performed at a low height. Therefore, if the object is raised at a high speed in the early stage and then raised to a proper height, Need to be finely adjusted. At this time, according to the above-described features of the present invention, when only one shut-off valve is opened, the object is raised at a high speed in a comparatively short time, and then gradually increases as the number of shut- The rising speed can be reduced. Therefore, the user has the effect of varying the elevation height of the object even if the hydraulic jack 400a is always operated with a constant force.

As another example, the control means (not shown) can automatically determine the shutoff valve valves 4511a, 4511b, and 4511c to be opened or closed according to the weight of the object disposed above the hydraulic jack 400a.

To this end, the hydraulic jack 400a according to still another embodiment may further include weight sensing means (not shown).

The weight sensing means (not shown) senses the weight of the object disposed on the upper portion of the hydraulic jack 400a and transmits the sensed weight to a control means (not shown) It is possible to determine whether the shutoff valve valves 4511a, 4511b, and 4511c are opened or closed, respectively.

For example, if the control means (not shown) determines that the weight of the object is included in the first critical section, which is relatively light in weight, all of the shutoff valves 4511a, 4511b, 4511c are opened, It is possible to control the lift height of the hydraulic jack 400 according to the turning operation to be relatively low. On the other hand, if the control means (not shown) confirms that the object is included in the relatively heavy second critical section, the at least one shut-off valve 4511a, 4511b, 4511c is opened, It is possible to control the lift height of the hydraulic jack 400 to be relatively low. This is because when the weight of the object is relatively light, the object can be removed from the hydraulic jack 400a during the ascending process. If the weight of the object is relatively heavy, the possibility of leaving the hydraulic jack 400a during the ascending process is relatively low. This is because a lot of upward force is needed.

As described above, the hydraulic jack 400a according to another embodiment of the present invention can vary the lifting force of the lifting piston 412 according to the kind of the object, the type of work, etc., so that the efficient operation using the hydraulic jack 400a can be performed .

17 is a perspective view illustrating a portable lifting apparatus having a hydraulic jack according to another embodiment of the present invention.

The movable lifting device 40 having the hydraulic jack according to another embodiment of the present invention includes a lower frame 310, an upper frame 320, a hydraulic jack 400, and a drop prevention part 700.

The lower frame 310, the upper frame 320, and the hydraulic jack 400 constituting the movable lifting device 40 having the hydraulic jack according to another embodiment of the present invention shown in FIG. 17 are shown in FIG. 1 The lower frame 310 and the upper frame 320 constituting the portable lifting apparatus 20 provided with the hydraulic jack according to an embodiment of the present invention are the same as those of the lower frame 310 and the upper frame 320,

The drop preventing portions 700 are respectively provided on both sides of the hydraulic jack 400 to support the upper frame 320 when the upper frame 320 is dropped to prevent the hydraulic jack 400 from being broken.

In one embodiment, the drop preventing portion 700 may include an elastic supporting portion 500 and a load dispersing portion 600.

18 is a view showing the elastic support portion of Fig.

18, the elastic support 500 includes a support frame 540, four support plates 510, four pairs of support frames 520, and support pillars 530.

The support frame 540 is supported by the support plate 510 provided at the lower side and supports the upper frame 320 by using an elastic force when the upper frame 320 is dropped.

The support plate 510 supports the support frame 540 that is seated on the upper side and is supported by the support columns 530 by the support frame 520 connected to the lower side.

That is, the support plate 510 seats the support frame 540 on the upper side, and the support plate 540 supports the left and right direction (i.e., the first frame 521a) by the elastic force corresponding to the vibration, Or the support frame 520 which is slidably moved in the vertical direction (i.e., the second frame 521b).

In addition, since the lengths of the first frame 521a or the second frame 521b are variously formed, the present invention overcomes the limitations of existing elastic bodies that can reduce the impact by simply adjusting the height in the vertical direction, The supporting position by the plate 510 can be freely adjusted not only in the vertical direction but also in the left and right direction.

The support frame 520 is connected to two frames of the first frame 521a and the second frame 521b so as to be rotatable at the bottom of each of the four support plates 510 to support the plate 510 , The length of the first frame 521a or the second frame 521b is adjusted as described above to determine the support position of the support frame 540 by the plate 510. [

The upper portion of the first frame 521a and the upper portion of the second frame 521b are connected to the lower portion of the receiving plate 510 and the lower portion of the first frame 521a is rotated and rotated on the upper surface of the supporting column 530. [ And the lower portion of the second frame 521b is connected to one side of the support pillar 530 so as to be rotatable and vertically slidable.

That is, the first frame 521a or the second frame 521b can receive vibration or shock transmitted from the support plate 510 through the rotation or sliding movement by the elastic force on the upper side or one side of the support column 530 To support pillars 530.

The lower part of the second frame 521b is connected to the upper surface of the first frame 521a so as to be rotatable and horizontally slidable, And the elastic force (that is, the cross elastic portion 533 or the vertical elastic portion 535) when the first frame 521a or the second frame 521b is slidingly moved is provided so as to be rotatable and vertically slidable Thereby absorbing vibration or shock.

Each supporting plate 510 or the supporting frame 520 is symmetrical with respect to each other and driven by the same method. The description of the supporting plate 510 or the supporting frame 520 as described above The same can be applied to the other support plate 510 or the other support frame 520, and a description thereof will be omitted.

In addition, although the elastic supporter 500 having the above-described structure can be formed with a vertically symmetrical structure, in the case of Fig. 18, the elastic supporter 500 is shown as being formed only on the upper portion of the supporter 530, The configuration associated with the four support plates 510 and the four pairs of support frames 520 as one would be equally applicable to the bottom of the support columns 530. [

19 and 20 are views showing the support pillars of Fig.

19, the support column 530 includes a column body 531, a cross groove 532, a cross elastic portion 533, four vertical grooves 534 (see FIG. 20), and four vertical elastic portions 534 (See FIG. 20).

The column body 531 is formed in a rectangular column shape, and a cross groove 532 is formed in an upper portion and a vertical groove 534 is formed in each side face.

The cross groove 532 is formed in the upper portion of the column body 531 in a "+" shape, and the cross-elastic portion 533 is inserted into the inner space.

The cross elastic portion 533 is formed in a shape corresponding to the shape of the cross groove 532 and is inserted into the cross groove 532 so that the lower side of the first frame 521a can be rotated And the vibration or shock transmitted from the first frame 521a is absorbed by elastic force to attenuate vibrations or shocks.

The vertical grooves 534 are vertically formed on the respective surfaces of the column body 531, and the vertical elastic portions 535 are inserted into the inner spaces.

The vertical elastic part 535 is formed in a shape corresponding to the shape of the vertical groove 534 and is inserted into the vertical groove 534 and the lower part of the second frame 521b is rotatably connected to the outside of the upper part, To absorb vibration or shock transmitted from the second frame 521b to attenuate vibrations or shocks.

FIG. 21 is a view showing the cross-elastic portion of FIG. 19; FIG.

21, the cross-elastic portion 533 includes a cross case portion 5331, an upper support portion 5332, four upper elastic portions 5333, four upper elastic support portions 5334, 5335 < / RTI >

The cross housing portion 5331 is formed in a hollow shape and is inserted into the cross groove 532 and has an upper support portion 5332, four upper elastic portions 5333, Upper elastic supporting portions 5334 are provided.

At this time, the length of each branch of the cross case portion 5331 is formed to be shorter than the length of each branch of the cross groove 532 as shown in FIG. 21, so that the space formed outside the cross case portion 5331 The connecting link portion 5335 should be disposed and be capable of forming a space for sliding movement.

The upper support portion 5332 is formed as a cube and is disposed at the center portion of the cross case portion 5331 and supports the upper elastic portion 5333 so that the upper elastic portion 5333 is disposed outside the four surfaces, do.

The upper elastic part 5333 is disposed on each side of the upper supporting part 5332 and supports the upper elastic supporting part 5334 by elastic force to absorb vibration or impact transmitted from the upper elastic supporting part 5334. [

The upper elastic supporting portions 5334 are respectively disposed at the ends of the respective branches of the inner space of the cross case portion 5331 and are supported by the elastic force of the upper elastic portion 5333 and are disposed between the upper connecting link portions 5335 And supports the upper connecting link portion 5335 by the supporting bar 5336.

The upper connecting link portions 5335 are disposed at the ends of the respective branches of the cross groove 532 and are provided with supporting bars 5336 provided between one side surface facing the cross case portion 5331 and the upper elastic supporting portion 5334 And the lower part of the first frame 521a is rotatably connected to the lower part of the upper frame 521. The lower end of the first frame 521a is connected to the upper end of the first frame 521a, And moves along the groove of the cross groove 532 in the center direction.

22 is a view showing the vertical elastic part of Fig.

22, the vertical elastic portion 535 includes a vertical case portion 5341, a side support portion 5342, a side elastic portion 5343, a side elastic support portion 5344, and a side connection link portion 5345 do.

The vertical case portion 5341 is formed in a shape corresponding to the shape of the empty vertical groove 534 and has a side supporting portion 5342, a side elastic portion 5343 and a side elastic supporting portion 5344 ) Are installed in order.

The side support portion 5342 is formed as a cube and disposed in the lower space of the vertical case portion 5341 and the side elastic portion 5343 is disposed on the upper side to support the side elastic portion 5343.

The side elastic part 5343 is disposed on the upper side of the side supporting part 5342 and supports the side elastic supporting part 5344 disposed on the upper side by an elastic force so that the vibration or shock transmitted from the side elastic supporting part 5344 Absorbed.

The side elastic support portion 5344 is disposed on the upper side of the inner space of the vertical case portion 5341 and is supported by the elastic force of the side elastic portion 5343 and is supported by the support bars 5346 Thereby supporting the side connecting link portion 5345.

The side connection link portion 5345 is disposed at the upper end of the vertical groove 534 and has a support bar 5346 installed between the lower side opposed to the vertical case portion 5341 and the upper side surface of the side elastic support portion 5344 And the second frame 521b is rotatably connected to the outer side of the second frame 521b so as to be slidable along the groove of the vertical groove 534 in the lower direction of the vertical groove 534 .

23, the load dispersing unit 600 includes a ball housing 610 provided below the support portion 630 for supporting the lower side of the elastic supporter 500 and having a hollow portion 615 therein, A plurality of small balls 620 for support placed in the portion 615 and a ground ball 645 having a fixing bolt 646 extending upward from the center of the ground plane 645 and the ground plane 645 at the top, 640).

The load dispersing unit 600 can disperse the load applied from the outside and partially absorb the load, and can transmit the load q smaller than the load P externally applied.

The load dispersing unit 600 disperses the load externally applied to the ball housing 610 inside the ball housing 610 and finally transmits a load smaller than the load externally applied to the ball housing 610 . The load exerted from the outside of the ball housing 610 is dispersed by the plurality of small balls 620 for support and the ground ball 640 located in the hollow portion 615. A part of the load is applied to the ball housing 610 And the remaining load can be transmitted to the outside of the ball housing 610.

The ball housing 610 may be fixed to the surface using concrete or the like and may be provided with a hollow portion 615 in which a plurality of small balls 620 for support and a ground ball 640 are accommodated .

The ball housing 610 is made of a material having a certain strength such as iron, concrete, wood, plastic or the like in order to support a load dispersed by a plurality of small balls 620 for support and a ground ball 640 ≪ / RTI >

The shape of the ball housing 610 may be various shapes such as a polygonal shape and a spherical shape. However, the hollow portion 615 may be formed in a spherical shape corresponding to the shape of the ground ball 640.

The plurality of small balls 620 for support and the ground ball 640 may be accommodated in the hollow portion 615 and may be formed in a spherical shape.

The plurality of small balls 620 for support can be regularly arranged and received so as to abut each other along the outer circumferential surface of the hollow portion 615. The ground ball 640 may be received in the hollow portion 615 in a state of being put on a plurality of small balls for support 620 and may be supported in a point contact state with a plurality of small balls 620 for support.

The plurality of small balls 620 for support and the ground balls 640 are regularly arranged so that the outer circumferences thereof are in contact with each other. By the contact points between the plurality of small balls 620 for support and the ground balls 640, The external load may be dispersed while pressing the hollow portion 615, that is, the inner wall of the ball housing 610, finally disposed at the outermost position. In this embodiment, a plurality of small balls 620 for support are regularly arranged and the ground balls 640 are arranged on a plurality of small balls 620 for support to arrange a plurality of small balls for support The number of contact points between the ball 620 and the ground ball 640 can be increased and the load transmission can be regularized to enhance the load transfer effect between the balls. In addition, the ground ball 640 is supported in a point contact state by a plurality of small balls 620 for support, so that wear can be minimized.

The plurality of small balls 620 for support and the ground ball 640 may be made of a material having strength capable of withstanding a load due to a contact point between the small balls 620 and the ground ball 640 and may be made of, for example, iron, concrete, have.

Meanwhile, the ground ball 640 may have a ground plane 645 on the top. A fixing bolt 646 is provided at the center of the ground plane 645 and inserted into the lower side of the supporting portion 630 to fix the supporting portion 630 to the ground ball 640.

At this time, the fixing bolt 646 may be formed in a non-patterned shape without forming a separate projection on the outer side, but may be formed in the lower side of the supporting portion 630 by forming a thread along the outer side surface It is preferable to tighten the bolts more strongly.

As described above, the load distribution unit 600 is provided below the elastic support unit 500 to support the elastic support unit 500, thereby assuring the stability of the support of the upper frame 320 by the elastic support unit 500 can do.

The tapping apparatus 10 according to another embodiment of the present invention may further include a composition for repairing a building structure including an acrylic binder for filling and repairing a crack where cracks are generated in the structure.

Here, the structure may correspond to the portable lifting devices 20, 30, and 40 having the mounting portion 100, the processing portion 200, or the hydraulic jack, but the present invention is not limited thereto. All of which may correspond to this.

The inventors of the present invention have found that, in a composition for repairing a conventionally existing building structure, a composition exhibiting satisfactory effects among compositions having improved water resistance, water resistance and crack resistance is not present, and as a result, Water resistance, water resistance, and crack resistance, all of which have satisfactory effects.

In the present invention, the acrylic binder may be an acrylic ester copolymer. The acrylic ester copolymer may be an acrylic ester copolymer having a CAS number of 30445-28-4. The inventors of the present invention found that when the composition contains the acrylic ester copolymer, it is possible to achieve both the water resistance and the crack resistance, which are the problems to be solved by the present invention, while searching for various compounds that can be added to the composition for repairing a building structure Respectively.

In the present invention, the acrylic binder may include 10 to 50 parts by weight, preferably 15 to 40 parts by weight, and more preferably 20 to 30 parts by weight.

The composition of the present invention may further include EVA binder, butyl cellosolve, rosin, texanol and propylene glycol specifically to achieve water resistance and water resistance among the problems to be solved by the present invention .

In the present invention, the EVA binder is preferably ethylene vinyl acetate and the CAS number is 24937-78-8.

In the present invention, the butylcellosolve may be a compound having CAS No. 111-76-2.

In the present invention, the rosin refers to a natural resin obtained by distilling rosin. Any rosin that is commercially available rosin may be included as a solution for solving the problem of the present invention.

In the present invention, TEXANOL may be a compound having CAS No. 25265-77-4.

In the present invention, the propylene glycol may be a compound having CAS No. 57-55-6.

The inventors of the present invention have found that the effect of water resistance is particularly improved when EVA binder, butyl cellosolve, rosin, texanol and propylene glycol are further contained as a constitution of a composition for repairing a building structure including an acrylic binder .

Specifically, the composition comprises 0.01 to 10 parts by weight of an EVA binder, 0.01 to 5 parts by weight of butyl cellosolve, 0.01 to 5 parts by weight of rosin, 0.01 to 5 parts by weight of texanol, and 0.01 to 3 parts by weight of propylene glycol .

More specifically, the present inventors have found that when the composition further comprises 2-amino-2-methyl-1-propanol and 2-methylamino-2-methyl-1-propanol, the effect of water resistance is remarkably improved Respectively. That is, the EVA binder, butyl cellosolve, rosin, texanol and propylene glycol, and 2-amino-2-methyl-1-propanol and 2-methylamino -2-methyl-1-propanol is further included, the present inventors have completed the present invention by confirming improved water resistance and water resistance.

In the present invention, the composition may contain the 2-amino-2-methyl-1-propanol and the 2-methylamino-2-methyl-1-propanol in a weight ratio of 15 to 20: 1, : 1, and more preferably in a weight ratio of 17 to 20: 1.

The 2-amino-2-methyl-1-propanol and the 2-methylamino-2-methyl-1-propanol may be contained in the composition in an amount of 0.1 to 5 parts by weight.

The inventors of the present invention have confirmed that the above composition can improve the water resistance in particular among the problems to be achieved by the present invention.

Also, the composition for repairing a building structure including the acrylic binder may further include ethylene glycol, butyl cellosolve, calcium carbonate, titanium dioxide, and water.

If the composition described above has excellent waterproofing and water resistance effects, the composition is characterized by improved crack resistance. The butyl cellosolve is as described above.

In the present invention, ethylene glycol refers to a compound having a CAS number of 107-21-1.

In the present invention, the calcium carbonate means a compound having a CAS number of 1317-65-3.

In the present invention, the titanium dioxide refers to a compound having a CAS number of 13463-67-7.

Specifically, the composition comprises 0.01 to 5 parts by weight of ethylene glycol, 0.01 to 5 parts by weight of butyl cellosolve, 20 to 50 parts by weight of calcium carbonate, 0.01 to 5 parts by weight of titanium dioxide, Weight part.

The present inventors have come to realize the idea in natural extracts while searching for a composition for improving crack resistance. The present inventors have found that the effect of crack resistance is remarkably improved when the composition further contains flaxseed mucus or flaxseed mucilage extract. That is, when ethylene glycol, butyl cellosolve, calcium carbonate, titanium dioxide and water, and flaxseed mucilage or flaxseed mucilage extract are additionally contained in the composition for building and repair containing the acrylic binder, The present invention has been completed through confirmation.

In the present invention, flax is an annual herbaceous herbaceous herbaceous plant of the dicotyledonous plant, and the seed is flat, long elliptical and yellowish brown.

In the present invention, the flaxseed mucilage can be produced by various methods, but for example, a mulberry slime can be prepared by scraping mucous from flaxseed with a scraper.

In the present invention, the flaxseed mucus extract may be prepared by way of example as follows.

1 g of flaxseed was put into 50 L of purified water and stirred at 25 ° C for 5 hours and then filtered through a 300-mesh filter cloth. The same amount of alcohol, preferably ethanol, was added to the filtrate to precipitate the wastewater, Only filter paper NO. 5, and dried to obtain a white powdery form.

Conventionally, various uses for flaxseed have been known. However, the effect of improving the crack resistance by incorporation into a composition for repairing a building structure as in the present invention has not been known to date, and research has been limited.

Specifically, the composition may contain 1 to 10 parts by weight of the flaxseed mucilage or the flaxseed mucilage extract.

The composition for repairing a building structure may further include at least one additive selected from a dispersant, an antifoaming agent, an antimicrobial agent, an antiseptic, and an antifreezing agent within a range that does not impair the basic physical properties of the composition for repairing a building structure.

The present invention also provides a method of manufacturing a building structure, comprising: S1) removing a deteriorated portion of a surface of a building structure; And S2) cracking and repairing of the structure may be performed by coating and drying the composition for repairing the building structure on the surface of the building structure from which the deteriorated portion has been removed to form a cracking repair film.

Hereinafter, the structure and effects of the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

Material preparation

The main raw materials used in the composition for repairing a building structure for the following examples and evaluation examples are as follows.

1) Acrylic binder: Acrylic ester copolymer CAS NO 30445-28-4

2) EVA binder: ethylene vinyl acetate CAS NO 24937-78-8

3) butylcellosolve: CAS NO 111-76-2

4) TEXANOL: CAS NO 25265-77-4

5) Propylene glycol: CAS NO 57-55-6

6) Ethylene glycol: CAS NO 107-21-1

7) Calcium carbonate: CAS NO 1317-65-3

8) Titanium dioxide: CAS NO 13463-67-7

9) 2-Amino-2-methyl-1-propanol: CAS NO 124-68-5

10) 2-Methylamino-2-methyl-1-propanol: CAS NO 27646-80-6

11) flaxseed mucus

The scum was used to scrape the mucous from flaxseed to obtain flaxseed mucilage.

12) Flaxseed mucus extract

1 g of flaxseed was put into 50 L of purified water, stirred at 25 ° C for 5 hours, and then filtered through a 300-mesh filter cloth. The same amount of ethanol was added to the filtrate to precipitate. 5, and dried to obtain about 0.2 g of a white powder.

Example 1

30 parts by weight of an acrylic binder was placed in a mixing tank, and 5 parts by weight of EVA binder, 1 part by weight of butyl cellosolve, 0.5 part by weight of rosin, 0.5 part by weight of texanol, 0.1 part by weight of propylene glycol and other viscosity auxiliary agents , a pH adjusting agent, and the like were gradually added in this order, and 50 parts by weight of calcium carbonate as a filler was added and stirred at a speed of 300 rpm for 1 hour at room temperature to prepare a composition for repairing a building structure.

Example 2

30 parts by weight of an acrylic binder was placed in a mixing tank, and 5 parts by weight of EVA binder, 1 part by weight of butyl cellosolve, 0.5 part by weight of rosin, 0.5 parts by weight of texanol, 0.1 part by weight of propylene glycol, Amino-2-methyl-1-propanol, 0.06 part by weight of 2-methylamino-2-methyl-1-propanol and other thickening assistants and pH adjusting agents were gradually added in this order and 50 parts by weight of calcium carbonate And the mixture was stirred at room temperature for 1 hour at a rate of 300 rpm to prepare a composition for repairing a building structure.

Example 3

30 parts by weight of an acrylic binder was placed in a mixing tank and stirred at 600 rpm at a rate of 1 part by weight of ethylene glycol, 1 part by weight of butyl cellosolve, 0.5 part by weight of titanium dioxide, 5 parts by weight of water and other viscosity aids, And 50 parts by weight of calcium carbonate as a filler were added and stirred at a speed of 300 rpm for 1 hour at room temperature to prepare a composition for repairing a building structure.

Example 4

30 parts by weight of an acrylic binder was added to a mixing tank, and 1 part by weight of ethylene glycol, 1 part by weight of butyl cellosolve, 0.5 part by weight of titanium dioxide, 5 parts by weight of water, 5 parts by weight of flaxseed extract and flaxseed extract And other pH adjusters were added in order. Then, 50 parts by weight of calcium carbonate as a filler was added and stirred at a speed of 300 rpm for 1 hour at room temperature to prepare a composition for repairing a building structure.

Evaluation example 1

The deteriorated parts of the civil engineering structure were removed, and the repair compositions for the building structures of Examples 1 to 4 were painted and dried, respectively, to form a crack repair film. The properties of the thus obtained crack repair film were evaluated based on the test methods on the KS standard and KSL 1593 for the adhesive strength, crack resistance and skid resistance and the storage stability of the crack repairing composition, and the results are shown in Table 1 below. Also, in case of waterproof property, the degree of water absorption into the interior after formation of the crack repair film was evaluated by the 5 point scale method. In Table 1, Product X represents a product for repairing a building structure of a building structure B, which is commercially available in Korea, and is evaluated as a comparative object to the composition of Examples 1 to 4.

[Table 1]

As shown in Table 1, it can be confirmed that the compositions for repairing building structures of Examples 1 to 4 have improved water resistance, water resistance and crack resistance compared with the product X, and that the storage stability and slip resistance are also satisfactory . Particularly, in Examples 1 and 2 of the present invention, it was confirmed that the waterproof property and the water resistance were evaluated more favorably, and in Examples 3 and 4, the crack resistance was further evaluated.

It will be apparent to those skilled in the art that the above-described embodiments are for illustrative purposes only and that those skilled in the art will readily understand that other embodiments can be readily modified without departing from the spirit or essential characteristics of the embodiments described above You will understand. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

It is to be understood that the scope of the present invention is defined by the appended claims rather than the foregoing description and should be construed as including all changes and modifications that come within the meaning and range of equivalency of the claims, .

10, 10a, 10b: tapping device 100:
200: machining unit 210:
211: body 212: tapping space
213: Tapping shelf 214: Through hole
220: Support part 230: Tapping part
231: Driving unit 240: Tapping control unit
250: discharging portion 310: upper frame
320: Lower frame 400: Hydraulic jack
500: elastic support part 600: load distribution part
700: drop prevention part 800: support part
900: Support frame

Claims (2)

And a processing unit for tapping and processing the mounted workpiece,
Further comprising a mounting part installed on one side or both sides of the processing part to mount a workpiece to be tapped so as to be horizontally left and right,
The processing section includes: a main body section forming an outer shape; A support provided below the main body to support the main body so as to be spaced apart from the ground; A tapping part installed vertically inside the body part, the lower part of the tapping part being vertically driven to tap and process the workpiece; A tapping control unit connected to the tapping unit by wire or wireless and receiving a control of driving the tapping unit from a user; And a discharge unit installed at a lower side of the main body to discharge a piece of the workpiece tapped by the tapping unit,
The body portion is formed in a cylindrical shape and has a tapered portion in an inner space thereof. A tapping space which is recessed in a rear end direction from a lower portion of the body to form a space for disposing a workpiece; A tapping lathe formed at a front end entrance portion of the tapping space and having a portion to be tapped in the workpiece; And a through hole formed in the tapping shelf so as to pass through the tapping shelf in a vertical direction to discharge a piece of the work piece tapped and separated in a downward direction,
Wherein the discharge portion discharges a piece of the work piece extending from the lower side of the tapping shelf and discharged through the through hole to the defrag storage bin,
Wherein the tapping portion includes a driving portion installed in an inner space of the body and receiving hydraulic pressure from an external hydraulic hose and vertically reciprocating the driving shaft using hydraulic pressure; A tab provided below the drive shaft and moving together with the downward movement of the drive shaft to tap and process the workpiece; And two support frames spaced apart from both sides of the tab and pressing and supporting the workpiece so that the workpiece does not move during tapping,
The driving unit moves the support frame downward together with the tab when the tab is moved downward so as to prevent the workpiece from moving on the tapping shelf when the tapping process is performed by pressing the workpiece, So that the work piece is separated from the tapping space,
Further comprising a movable lifting device provided at a lower side of the processing portion and having a hydraulic jack for lifting or lowering the processed portion in an upward direction,
The portable lifting device provided with the hydraulic jack includes a lower frame having moving means on a lower surface thereof and having at least one column whose length is variable on an upper surface thereof; An upper frame supported by the at least one post and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame for lifting and lowering the upper frame using an external force provided by a user to lift and lower an object placed on the upper frame,
The hydraulic jack includes a main body in which a working fluid is stored and in which an inner cylinder and a lifting piston are disposed; A pressure piston provided outside the main body and communicating with the main body to maintain a closed state, and a pressure piston is formed inside the main body, and when the pressure piston is lowered after the working fluid is sucked as the pressure piston rises, An outer cylinder for providing a working fluid to the inner cylinder; A pressure lever connected to the pressure piston disposed inside the outer cylinder to transmit an external force provided by the user to the pressure piston; And a release valve releasing the pressure of the inner cylinder according to an operation of a user to return the working fluid introduced into the inner cylinder to the main body,
Wherein the plurality of outer cylinders are provided with a first outer cylinder formed along a central axis coaxial with the pressure lever and at least one second outer cylinder arranged along the diameter of the first outer cylinder, Wherein the sum of diameters of the first outer cylinder and the at least one second outer cylinder is 1/3 or less of the diameter of the inner cylinder,
The first outer cylinder and the at least one second outer cylinder are connected to the main body through a suction pipe for introducing a working fluid stored in the main body,
Wherein the hydraulic jack further comprises control means for selectively opening and closing a plurality of suction pipes formed in the first outer cylinder and at least one of the second outer cylinders to vary the strength of the pressure piston.
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