KR102020885B1 - Automatic bolt fastening device - Google Patents

Abstract

The present invention relates to an automatic bolt fastening device and, more specifically, to an automatic bolt fastening device which is configured to automatically fasten a bolt with respect to an object in an automatic assembly process. The automatic bolt fastening device comprises a lifting part enabling a workpiece of which a bolt required to be fastened is formed at one side or both sides to be mounted thereon, and lifting the mounted workpiece to be bolted upwards or lowering the workpiece which has been bolted.

Description

Automatic bolt fastening device {AUTOMATIC BOLT FASTENING DEVICE}

The present invention relates to an automatic bolt fastening device, and more particularly, to an automatic bolt fastening device implemented to automatically fasten the bolt to the object in the automated assembly process.

In general, direct fastening with a screwdriver is commonly used to fasten bolts to an object. However, this type of assembly method is not suitable for mass production. Has been developed and used.

In the conventional stand type automatic bolt fastener, when the bolt supplied from the bolt supply part is seated on the distribution part, the fastening part descends to absorb the bolt on the distribution part, and then rotates the bolt to couple to the object.

However, in the conventional automatic bolt fastener, when the fastening part is lowered to a predetermined level and stopped, specifically, the fastening part includes a suction pipe and a driver embedded in the suction pipe, and the height of the predetermined level when the suction pipe and the driver descends. When it descends until the stopper formed by the stopper of the adsorption pipe, the adsorption pipe stops descending, and only the driver continues to descend to fasten the bolt to the object.

At this time, the conventional automatic bolt fastener is a reaction force (hereinafter referred to as "repulsive force") to the force applied to the object when the bolt is tightened by the driver is transmitted to the automatic bolt fastener, this reaction in the conventional automatic bolt fastener There is a problem that causes the damage of the automatic bolt fastener does not have a buffer member that can buffer against the force of.

When such a repulsion occurs, not only the automatic bolt fastener but also affects the object to which the bolt is fastened, causing improper fastening or damage to the object.

On the other hand, the background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention. .

Korean Patent Registration No. 10-1181817 Korean Patent Publication No. 10-2015-0130062

One aspect of the present invention provides an automatic bolt fastening device embodied not only to freely lift or lower the heavy object, but also to automatically fasten the bolt to the object in an automated assembly process.

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

Automatic bolt fastening device according to an embodiment of the present invention, the workpiece is formed on one side or both sides of the bolt that needs to be fastened is seated on the upper side, elevating the workpiece required to be seated bolt fastening, or It includes a lifting unit for lowering the workpiece to be bolted.

In one embodiment, the automatic bolt fastening device according to an embodiment of the present invention, is spaced apart on the upper portion of the elevating portion, when the workpiece is lifted by the elevating portion, the gripping to hold both sides of the workpiece when the bolt is fastened Device; And a bolting device spaced apart from the upper side of the elevating unit and rotating the bolt so that the bolt can be fastened to the workpiece when the workpiece is lifted by the elevating unit.

In one embodiment, the lifting portion, the workpiece is mounted on the upper shelf; A plurality of lifting pistons installed at a lower side of the shelf and extending or contracting in a vertical direction to lift or lower the shelf; And it is installed on one side of the shelf, it may include a detection sensor for detecting whether the workpiece is seated on the shelf.

" 또는 "

" 형태로 형성되고, 각각의 상부가 상기 두 개의 연결 링크 각각의 다른 일측에 회동 가능하도록 연결 설치되고, 하부가 상기 하우징에 회동 가능하도록 연결 설치되며, 상기 구동부가 하측 방향으로 구동되면 서로 대향하고 있는 각각의 하부가 서로 가까워지는 방향으로 이동하여 피가공물을 파지하고, 상기 구동부가 상측 방향으로 구동되면 서로 대향하고 있는 각각의 하부가 서로 멀어지는 방향으로 이동하여 피가공물의 파지를 푸는 두 개의 파지 링크를 포함할 수 있다.In one embodiment, the gripping apparatus, the housing is formed in the shape of the hollow "ㅁ"; A driving unit which is formed in a “형태” shape and has an upper portion penetrated and connected to an upper portion of the housing and is driven in an up and down direction in an inner space of the housing; Two connection links which are formed in a horizontal direction in the inner space of the housing and each one side of which is connected to the lower one side or the other side of the driving unit to be rotatable; And "

" or "

", Each upper portion is rotatably connected to the other side of each of the two connecting links, and the lower portion is rotatably connected to the housing, and the driving portion is opposed to each other when driven in the downward direction Two lower gripping links that move in a direction closer to each other to grip the workpiece, and when the driving unit is driven upward, two gripping links that move toward each other to move away from each other in a direction away from each other It may include.

In one embodiment, the connection link may be installed to be inclined downward while going from one side connected to the driving unit to the other side.

" 또는 "

" 형태로 형성되는 바디 프레임; 상기 볼팅장치의 전단에 형성되는 돌기가 삽입될 수 있도록 다른 파지 링크의 바디 프레임과 대향하는 상기 바디 프레임의 하부 일측에 형성되는 삽입홈; 및 상기 삽입홈의 하부에 형성되어 피가공물을 체결하는 체결 패드를 포함할 수 있다.In one embodiment, the gripping link is "

" or "

"Body frame formed in the form; Insertion groove formed in the lower side of the body frame facing the body frame of the other gripping link so that the projection formed in the front end of the bolting device; And in the lower portion of the insertion groove It may include a fastening pad is formed to fasten the workpiece.

In one embodiment, the bolting device, the support shelf is spaced apart from the upper side of the lifting unit; A sliding frame connected to the lower side of the support shelf and slidingly moving in the direction of the workpiece when the workpiece is lifted by the lifting portion; And installed at the front end of the sliding frame, it may include a bolting bundle for rotating the bolt so that the bolt can be fastened to the workpiece.

In one embodiment, the support shelf may be spaced apart from the upper side of the lifting unit, the sliding frame is installed on the lower side to support the sliding movement.

In one embodiment, the sliding frame is connected to the lower side of the support shelf, when the workpiece is lifted by the lifting portion can be moved in the direction of the workpiece by sliding so that the bolting bolt is fastened to the bolt.

In one embodiment, the bolting bunch is installed at the front end of the sliding frame, and move together according to the sliding movement of the sliding frame and then rotate the bolt to rotate itself so that the bolt can be fastened to the workpiece.

In one embodiment, the automatic bolt fastening device according to an embodiment of the present invention, provided with a hydraulic jack for elevating the workpiece corresponding to the elevated height of the shelf so as to move the workpiece to the shelf of the elevating portion of the elevated state Movable lifting devices; And a conveying apparatus for moving the workpiece to the lathe of the lifting unit in a state in which the lifting workpiece is lifted by the lifting jack provided with the hydraulic jack.

In one embodiment, the movable lifting device provided with the hydraulic jack, the lower frame is provided with a moving means on the lower surface, at least one column is variable in length on the upper surface; An upper frame supported by the at least one pillar and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame to lift and lower the upper frame using an external force provided by a user to lift and lower an object seated on the upper frame. If a plurality of forming molds to form a different type of pattern is loaded, it may include a hydraulic jack for lifting or lowering the loaded forming mold in the vertical direction according to the needs of the user or to transfer to another place.

In one embodiment, the hydraulic jack, the working fluid is stored, the inner cylinder and the lifting piston is disposed a body; Is installed on the outside of the main body is in communication with the main body to maintain a closed state, there is a pressure piston is formed therein, the working fluid is sucked as the pressure piston is raised and the suction sucked as the pressure piston is lowered An outer cylinder providing a working fluid to the inner cylinder; A pressure lever connected to a pressure piston disposed inside the outer cylinder to transfer an external force provided from a user to the pressure piston; And a release valve for releasing the pressure of the inner cylinder according to a user's operation to recover the working fluid introduced into the inner cylinder to the main body.

In one embodiment, the outer cylinder is provided in plurality, wherein the plurality of outer cylinder is at least one disposed along the diameter of the first outer cylinder and the first outer cylinder formed along a central axis coaxial with the pressure lever. And a second outer cylinder of, wherein the sum of the diameters of the first outer cylinder and the at least one second outer cylinder may be equal to or less than one third of the diameter of the inner cylinder.

In one embodiment, the first outer cylinder and at least one second outer cylinder may be connected to the main body through an inlet pipe for introducing the working fluid stored in the main body into the inside.

In one embodiment, the hydraulic jack further includes a control means for selectively opening and closing the plurality of inlet pipes formed in each of the first outer cylinder and at least one second outer cylinder to vary the lifting force of the pressure piston. Can be.

In one embodiment, the control means, after opening any one inlet pipe from the time of the initial operation of the hydraulic jack until the pressure lever is operated a predetermined number of times, the time when the pressure lever is operated more than a predetermined number of times From the plurality of inlet pipe can be controlled to open.

In one embodiment, the movable lifting device provided with the hydraulic jack, each installed on both sides of the hydraulic jack further includes a drop preventing unit for supporting the upper frame when the upper frame falls to prevent the hydraulic jack from being damaged. Can be.

In one embodiment, the fall prevention portion may include an elastic support and a load distribution.

In one embodiment, the elastic support portion is installed on the upper side of the load distribution unit to prevent the falling object collides with the hydraulic jack to damage the hydraulic jack to support the upper frame using the elastic force when the upper frame falls. can do.

In one embodiment, the load dispersing portion is installed on the lower side of the elastic support to support the lower side of the elastic support, the ball housing is provided with a hollow inside, a plurality of small balls for supporting and placed in the hollow portion and the upper The ground plane may include a ground ball having a fixing bolt extending in an upward direction from a center of the ground plane and the ground plane.

According to one aspect of the present invention, it is possible to significantly improve the fastening accuracy of the bolt while preventing the fastening of the fastening object, thereby helping to increase the reliability of the product as well as simple structure and excellent price competitiveness There is an effect that can ensure the versatility of use.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the scope apparent to those skilled in the art from the following description.

1 and 2 are diagrams showing a schematic configuration of an automatic bolt fastening device according to an embodiment of the present invention.
3 and 4 are views showing the holding device of FIG.
5 is a view showing the bolting device of FIG.
It is a figure explaining the processing process of the to-be-processed object by a holding apparatus and a bolting apparatus.
7 is a view showing an automatic bolt fastening device according to another embodiment of the present invention.
Figure 8 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to an embodiment of the present invention.
9 is a perspective view showing a specific configuration of the hydraulic jack shown in FIG.
FIG. 10 is a conceptual view illustrating an internal configuration and an operating principle of the hydraulic jack illustrated in FIGS. 8 and 9.
11 is a view showing the outer cylinder and the connecting portion.
12 is a perspective view showing a movable lifting device equipped with a hydraulic jack according to another embodiment of the present invention.
13 to 15 is a perspective view showing a hydraulic jack according to another embodiment of the present invention.
Figure 16 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to another embodiment of the present invention.
17 is a view showing the elastic support of FIG.
18 is a view illustrating the first plate of FIG. 17.
19 is a flowchart illustrating a plastic sheet manufacturing method for producing a plastic sheet of the present invention.
20 is a view showing a load distribution of FIG.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, 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 shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

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

1 is a view showing a schematic configuration of an automatic bolt fastening device according to an embodiment of the present invention.

Referring to FIG. 1, the automatic bolt fastening device 10 according to an embodiment of the present invention includes a lifting unit 100.

Lifting unit 100, the workpiece (1) formed on one side or both sides of the bolt (2) that needs to be fastened is seated on the upper side, the holding device 200 and bolting to describe the workpiece (1) to be described later The device 300 is moved upward or downward, or the workpiece 1 which is fastened to the bolt 2 is completed.

In one embodiment, the lifting unit 100 may include a shelf 110, a plurality of lifting pistons 120 and a sensing sensor 130.

In the shelf 110, the workpiece 1 is mounted on the upper side, and is lifted in the upper direction by the lifting piston 120 provided at the lower side, or lowered again in the lower direction.

Referring to FIG. 2, the lifting piston 120 is installed at the lower side of the shelf 110 and extends or contracts in the vertical direction of the shelf 110 to raise or lower the shelf 110.

The detection sensor 130 is installed at one side of the shelf 110 and detects whether the workpiece 1 is seated on the shelf 110.

At this time, the detection sensor 130, regardless of the contact detection or non-contact detection, if the device capable of detecting the presence of the workpiece (1) on the shelf 110 will be applicable regardless of its name. .

The automatic bolt fastening device 10 having the configuration as described above further includes two holding devices 200-1 and 200-2 and two bolting devices 300-1 and 3002.

The holding device 200 is spaced apart from the upper side of the elevating unit 100, and as shown in FIG. 2, when the workpiece 1 is elevated by the elevating unit 100, the gripping unit 200 is prevented when the bolt 2 is fastened. Both sides of the workpiece 1 are gripped to prevent the workpiece 1 from shaking.

The bolting device 300 is installed to be spaced apart from the upper side of the lifting unit 100, so that the bolt (2) can be fastened to the workpiece (1) when the workpiece (1) is lifted by the lifting unit 100 Rotate the bolt (2).

The automatic bolt fastening device 10 having the configuration as described above can greatly improve the fastening accuracy of the bolts while preventing damage to the workpiece 1, thereby not only helps to increase the reliability of the product Simple structure and excellent price competitiveness ensure the universal use.

3 is a view showing the holding device of FIG.

Referring to FIG. 3, the gripping apparatus 200 includes a housing 210, a driving unit 220, two connection links 230, and two gripping links 240.

The housing 210 is formed in a shape of a hollow "ㅁ", the upper part of which is inserted into the upper part of the driving unit 220 and is driven in the vertical direction, and the lower part of the gripping link 240 is connected to the installation installation 244. )do.

The driving unit 220 is formed in a “ㅗ” shape, and an upper portion penetrates an upper portion of the housing 210 and is installed to be connected, and one side of the connecting link 230 is connected to be rotatable, and an inside of the housing 210 is formed. It is driven in the vertical direction in the space and drives one side of the connection link 230 in the vertical direction.

The connection link 230 is formed in a horizontal direction in the left and right directions in the inner space of the housing 210, and one side is connected to the lower one side or the other side of the driving unit 220 so as to be rotatable, and the gripping link 240 on the other side. The upper part of the connection is installed so as to be rotatable.

In one embodiment, the connection link 230 may be installed to be inclined downward while going from one side connected to the driving unit 220 to the other side (ie, a portion in which the gripping link 240 is connected).

At this time, the connection link 230, when one side is pulled in the upper direction by the drive unit 220 to pull the upper portion of the one gripping link 240 toward the other side in the direction closer to the upper portion of the other gripping link 240 The lower part of one gripping link 240 is moved in a direction away from the lower part of the other gripping link 240, and when one side is pressed downward by the driving unit 220, the other gripping the upper part of the gripping link 240 to one side Pressing in a direction away from the upper portion of the link 240 may be such that the lower portion of one gripping link 240 is moved in a direction closer to the lower portion of the other gripping link 240.

" 또는 "

" 형태로 형성되고, 각각의 상부가 두 개의 연결 링크(230) 각각의 다른 일측에 회동 가능하도록 연결 설치되고, 하부가 하우징(210)에 회동 가능하도록 연결 설치되며, 구동부(220)가 하측 방향으로 구동되면 서로 대향하고 있는 각각의 하부가 서로 가까워지는 방향으로 이동하여 피가공물(1)을 파지하고, 구동부(220)가 상측 방향으로 구동되면 서로 대향하고 있는 각각의 하부가 서로 멀어지는 방향으로 이동하여 피가공물(1)의 파지를 푼다.Gripping link 240 is, "

" or "

", Each upper portion is rotatably connected to the other side of each of the two connection links 230, the lower portion is rotatably connected to the housing 210, the driving unit 220 is downward When driven in the direction that each of the lower parts facing each other move closer to each other to grip the workpiece 1, when the drive unit 220 is driven in the upper direction, the lower parts facing each other move in a direction away from each other The gripping of the workpiece 1 is then carried out.

In one embodiment, the gripping link 240 includes a body frame 241, an insertion groove 242 and a fastening pad 243.

" 또는 "

" 형태로 형성되고, 하부 일측에 삽입홈(242)이 형성된다.Body frame 241 is "

" or "

"Is formed in the shape, the insertion groove 242 is formed on one side of the lower.

The insertion groove 242 is a body frame 241 facing the body frame 241 of the other gripping link 240 so that the projection 331 (see FIG. 5) formed at the front end of the bolting device 300 can be inserted. It is formed on one side of the lower part.

That is, the insertion groove 242, when the workpiece 1 is not seated on the shelf 110, the bolting device 300 does not fasten the bolt (2) is moved in the direction of the holding device 200, the projection 331 As a space is inserted, the projection 331 is fastened to this to prevent the rotation of the bolting bunch 330 can prevent unnecessary rotation of the bolting bunch (330).

The fastening pad 243 is formed under the insertion groove 242 to fasten the workpiece 1.

5 is a view showing the bolting device of FIG.

Referring to FIG. 5, the bolting device 300 includes a support shelf 310, a sliding frame 320, and a bolting bundle 330.

The support shelf 310 is installed to be spaced apart from the upper side of the lifting unit 100, and the sliding frame 320 is installed at the lower side to support the sliding movement.

Sliding frame 320 is connected to the lower side of the support shelf 310, when the workpiece (1) is lifted by the lifting unit 100 is moved in the direction of the workpiece (1) by the bolting bundle (330) To the bolt (2).

The bolting bundle 330 is installed at the front end of the sliding frame 320, moves together according to the sliding movement of the sliding frame 320, and then rotates itself so that the bolts 2 can be fastened to the workpiece 1. Rotate the bolt (2).

However, when the workpiece 1 is not seated on the lifting unit 100, the protrusion 331 may be inserted into the insertion groove 242 as described above, thereby preventing unnecessary idling.

Referring to Figure 6 describes the machining process of the workpiece 1 by the gripping apparatus 200 and the bolting device 300 as follows.

First, when the fastening of the bolt 2 by the bolting device 300 is completed (Fig. 6 (a)), the bolting device 300 moves in a direction away from the workpiece 1 (Fig. 6 (b) )), The gripping apparatus 200 releases the gripping of the workpiece (1) so that the workpiece (1) is lowered by the lifting unit 100 (Fig. 6 (c)).

7 is a view showing an automatic bolt fastening device according to another embodiment of the present invention.

Referring to FIG. 7, the automatic bolt fastening device 10 according to another embodiment of the present invention further includes a movable lifting device 20 and a transfer device 50 provided with a hydraulic jack.

The movable lifting device 20 equipped with the hydraulic jack corresponds to the elevated height of the shelf 110 so that the workpiece 1 can be moved to the shelf 110 of the elevated portion 100 in the elevated state. Lift 1).

The conveying device 50 is constituted by a conveying means such as a hoist, and lifts the workpiece 1 lifted by a mobile lifting device 20 equipped with a hydraulic jack by using a forceps, and then lifts the lifted state. The workpiece 1 is transferred to the shelf 110 of the part 100.

In the automatic bolt fastening device 10 according to another embodiment as described above, the holding device 200 and the bolting device 300 is normally driven, but when the normal operation of the lifting unit 100 is impossible, the hydraulic jack is provided After lifting the workpiece 1 to the required height using the movable lifting device 20, the workpiece 1 is seated on the upper side of the lifting unit 100 using the transfer device 50, and then the bolt 2 is lifted. By tightening, the continuity of the bolting process can be maintained even in an emergency.

Figure 8 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to an embodiment of the present invention.

Specifically, the movable lifting device 20 equipped with the hydraulic jack according to an embodiment of the present invention may include a lower frame 810, an upper frame 820, and a hydraulic jack 400.

The lower frame 810 is a member constituting the lower surface of the movable lifting device 20. The lower surface of the lower frame 810 is provided with a moving means 830, the movable lifting device 20 equipped with a hydraulic jack according to the present invention can be guaranteed mobility.

At least one pillar 840 may be disposed on the upper surface of the lower frame 810.

As shown, four pillars 840 may be provided at the corners of the lower frame 810, but the number of installation pillars is not limited.

The pillar 840 may be provided in a form in which the length may vary. For example, the pillar 840 may include an outer pillar having a first diameter and an inner pillar having a diameter smaller than the first diameter and inserted into the outer pillar and sliding along the longitudinal direction of the outer pillar. In this case, the overall length of the pillar 840 is shortened when the inner pillar is slid in the direction inserted into the outer pillar, and the overall length of the pillar 840 may be increased when the inner pillar is slid in the direction protruding from the outer pillar. However, the pillar 840 need not be limited to the above-described configuration, and may be replaced with other conventional configurations as long as the length can be changed by an external force.

The upper frame 820 may be supported from the lower frame 810 by at least one pillar 840 and disposed in parallel with the lower frame 810. An object to be lifted, that is, the workpiece 1 may be seated on the upper surface of the upper frame 820. When the length of the pillar 840 is increased, the upper frame 820 is lifted from the ground while the upper frame 820 is lifted. The workpiece (1) seated in the) is lifted.

Hydraulic jack 400 is a device for providing a lifting force to such a pillar (840). Hydraulic jack 400 is installed between the lower frame 810 and the upper frame 820, in order to lift the object seated on the upper frame 820, variable length of the column 840 using an external force provided from the user As a result, the upper frame 820 can be elevated. In this regard, it will be described with reference to FIGS. 9 to 11 together.

9 is a perspective view showing a specific configuration of the hydraulic jack 400 shown in Figure 8, Figure 10 is a conceptual diagram for explaining the internal configuration and operating principle of the hydraulic jack 400 shown in Figs.

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

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

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

The lifting piston 412 is a member installed in the inner cylinder 411 to reciprocate 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 raised by the pressure of the working fluid and the length of the column 840 is increased, thereby contacting the upper portion of the lifting piston 412. The upper frame 820 may rise from the ground.

The outer cylinder 420 is a member for supplying a fluid to the inner cylinder 411, and may be connected to the main body 410 through the fastening bracket 415 so that the outer cylinder 410 is maintained in a sealed state. The pressure piston 421 is formed in the pressure piston 421, and the pressure piston 421 may be raised or lowered by the pressure lever 430.

The pressure lever 430 is a member connected to the pressure piston 421 to transfer the external force provided from the user to the pressure piston 421.

11 is a view illustrating an outer cylinder 420 constituting the hydraulic jack 400 and a connecting portion 422 for coupling the pressure piston 421 and the pressure lever 430 of the outer cylinder 420. The pressure piston 421 formed inside the 420 is physically coupled to the pressure lever 430 through the connection portion 422, and due to this structural feature, the pressure piston 421 is provided by the user provided through the pressure lever 430. Can receive external force.

The pressure lever 430 has a through hole for coupling a member such as a pipe that can be gripped by the user, and thus the user moves the pipe up and down while the pipe is coupled to the pressure lever 430. Accordingly, 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.

Looking at the specific operation principle of the hydraulic jack 400 according to an embodiment of the present invention, the user lifts the pressure lever 430 in a state in which the object to be raised by the hydraulic jack 400 is seated on the upper frame 820. When raised, the pressure piston 421 is raised to form a negative pressure in the outer cylinder 420. Accordingly, the working fluid stored between the main body 410 and the inner cylinder 411 may flow into the outer cylinder 420 along the suction pipe 451.

Then, when the user presses the pressure lever 430, the pressure piston 421 is lowered to apply pressure to the working fluid sucked into the outer cylinder 420. Thus, the working fluid sucked into the outer cylinder 420 may move to the inner cylinder 411 along the supply pipe 452. At this time, one end of the suction pipe 451 connected to the outer cylinder 420 side is provided with a non-return valve so that the working fluid can be pumped only along the supply pipe (452). The lifting piston 412 is raised by the pressure of the working fluid introduced into the inner cylinder 411. This process is repeated as the user raises and lowers the pressure lever 430, and as a result, as the pressure of the inner cylinder 411 gradually increases, the lifting piston 412 gradually rises to raise the lifting piston ( 412) The object on the top is lifted.

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 a user's operation. That is, when the user wants to lower the object to the original position, when the release valve 440 is opened, the high pressure charged working fluid introduced into the inner cylinder 411 receives gravity of the object through the recovery pipe 530. As the pressure of the lifting piston 412 is recovered to the main body 410, the lifting piston 412 is lowered by the gravity of the object while the pressure of the inner cylinder 411 is lowered, and the object may be lowered to its original position. .

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

On the other hand, 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 the object and the type of work to be performed. In this regard, it will be described with reference to FIGS. 12 to 15 together.

12 is a perspective view showing a movable lifting device equipped with a hydraulic jack according to another embodiment of the present invention.

Specifically, the movable lifting device 30 provided with the hydraulic jack according to another embodiment of the present invention includes a lower frame 810, an upper frame 820, and a hydraulic jack 400a.

At this time, the lower frame 810 and the upper frame 820 constituting the movable lifting device 30 provided with a hydraulic jack according to another embodiment of the present invention shown in Figure 12 is an embodiment of the present invention shown in Figure 8 Since it is the same as the lower frame 810 and the upper frame 820 constituting the movable lifting device 420 with the hydraulic jack according to the example, repeated description will be omitted.

On the other hand, the movable lifting device 30 equipped with the hydraulic jack according to another embodiment of the present invention constitutes the movable lifting device 30 provided with the hydraulic jack shown in FIG. 8, the hydraulic jack according to an embodiment of the present invention ( 400 may be replaced with a hydraulic jack 400a according to another embodiment of the present invention. In this regard, it will be described with reference to FIGS. 13 to 15 together.

13 to 15 are perspective views showing the hydraulic jack 400a according to another embodiment of the present invention.

FIG. 13 is a perspective view of a hydraulic jack 400a according to another embodiment of the present invention, FIG. 14 is a view comparing an outer cylinder constituting the hydraulic jack 400a of FIG. 13, and FIG. 15 is a hydraulic jack (shown in FIG. 13). It is a conceptual diagram for explaining the internal structure and operation principle of 400a).

Specifically, the hydraulic jack 400a according to another embodiment of the present invention, the main body 410, the outer cylinder (420a, 420b, 420c, 620d, 620e, 620f), the pressure lever 430 and the release valve 440 Include.

At this time, the main body 410, the pressure lever 430 and the release valve 440 constituting the hydraulic jack 400a according to another embodiment of the present invention shown in Figure 10, one embodiment of the present invention shown in Figure 8 Since the main body 410, the pressure lever 430 and the release valve 440 constituting the hydraulic jack 400 according to the example, the repeated description will be omitted.

On the other hand, the hydraulic jack 400a according to another embodiment of the present invention may be characterized in that a plurality of outer cylinder 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. 12, the hydraulic jack 400a according to another embodiment of the present invention includes six outer cylinders 420b, 420c, centered on a first outer cylinder 420a formed along a central axis coaxial with the pressure lever 430. 420d, 420e, 420f, and 420g are expressed as being disposed along the circumference of the first outer cylinder 420a, but the present invention is not limited thereto, and the number of the outer cylinders is not limited.

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, respectively. That is, when a user applies an external force to the hydraulic jack 400a by operating the pressure lever 430, the pressure lever 430 applies the external force provided to each of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g. Can be distributed by).

In this case, when the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are all designed to have the same diameter, the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are delivered to each other. The external force may be uniformly distributed. As another example, when the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, and 420g are designed to have different diameters, the external force may be transmitted in proportion to the size of the diameter.

In addition, the sum of the 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. Is preferably designed such that the sum of the diameters of the outer cylinders 420a, 420b, 420c, 420d, 420e, 420f, 420g is one third or less than 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 detailed operation principle of the hydraulic jack 400a according to another embodiment of the present invention will be described with reference to FIG. 15.

In FIG. 15, the hydraulic jack 400a according to another embodiment of the present invention is illustrated with three outer cylinders 420a, 420b, and 420c. However, as described above, FIG. 13 illustrates the hydraulic jack 400a of FIG. 11. As a conceptual diagram illustrating the operating principle, two outer cylinders or four or more outer cylinders may also be the same as or similar to the following operating principles.

When the user lifts the pressure lever 430 while the hydraulic jack 400a is in contact with the object under the object to be raised, the pressure pistons 421a, 421b, and 421c of the respective outer cylinders 420a, 420b, and 420c. As the) rises, 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 may flow into the outer cylinders 420a, 420b, and 420c along the suction pipes 451a, 451b, and 451c.

Then, when the user presses the pressure lever 430, the pressure piston (421a, 421b, 421c) is lowered to apply pressure to the working fluid sucked into the outer cylinder (420a, 420b, 420c). Accordingly, the working fluid sucked into the outer cylinders 420a, 420b, and 420c may move to the inner cylinder 411 along the supply pipes 452a, 452b, and 452c. The lifting piston 412 is raised by the pressure of the working fluid introduced into the inner cylinder 411. This process is repeated as the user raises and lowers the pressure lever 430, and as a result, as the pressure of the inner cylinder 411 gradually increases, the lifting piston 412 gradually rises to raise the lifting piston ( 412) The object on the top is lifted.

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

The 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) may open and close the respective shutoff valves 4511a, 4511b, and 4511c according to the user's operation.

Equation 1 is a formula representing a force (W) applied to the lifting piston 412, the lifting force (W) acting on the lifting piston 412 is pressed against the diameter (D) of the lifting piston 412 It may be determined by the ratio of the sum d of the diameters 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 the external force w of a predetermined size through the pressure lever 430 to the hydraulic jack 400, the lifting force of the lifting piston 412 is the pressure piston (D) for the diameter D of the lifting piston 412. It may vary depending on the ratio of the diameter d of the 421a, 421b, and 421c. 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 the outer cylinders 420a, 420b, and 420c. As a result, the lifting force W acting on the lifting piston 412 depends on the ratio of the diameter sum of the outer cylinders 420a, 420b, and 420c to the diameter of the inner cylinder 411. Can be variable.

Therefore, the hydraulic jack 400a according to another embodiment of the present invention selectively controls the opening and closing of the shutoff valves 4511a, 4511b, and 4511c by a control means (not shown) to the outer cylinders 420a, 420b, and 420c. It is possible to adjust the amount of the working fluid flows in, and to increase the lifting force of the lifting piston 412 by applying pressure to the working fluid only through the pressure piston (421a, 421b, 421c) isolating valve (4511a, 4511b, 4511c) is open. It can be adjusted.

For example, when only the first shutoff valve 4511a is closed according to a user's control means (not shown), the external force applied to the working fluid is operated when all the shutoff valve valves 4511a, 4511b, and 4511c are opened. Only two thirds of the external force w applied to the fluid can be transmitted. In other words, the diameters of the outer cylinders 420a, 420b, and 420c may be varied according to the control of the control means (not shown) to have the effect of adjusting the lifting force W of the lifting piston 412. It is possible to adjust the lifting height of the hydraulic jack 400 according to the one-time operation of the pressure lever 430 according to the type of the object to be raised or the type of work to be performed after lifting the object.

In some other embodiments, control means (not shown) may automatically determine the shut-off valve valves 4511a, 4511b, 4511c to open and close.

For example, the control means (not shown) opens only one shut-off valve valve 4511a, 4511b, 4511c from the initial operation time of the hydraulic jack 400a until the pressure lever 430 is operated a predetermined number of times. From the time when the pressure lever 430 is operated more than a predetermined number of times, the plurality of shutoff valve valves 4511a, 4511b, and 4511c may be controlled to be opened. More specifically, the control means (not shown) allows only the first shut-off valve 4511a to be opened until the pressure lever 430 is operated for the first five times, and until the pressure lever 430 is operated for 6 to 10 times. The first shutoff valve 4511a and the second shutoff valve 4511b may be opened, and at least 11 times, all the shutoff valves 4511a, 4511b, and 4511c may be controlled to open. In general, when lifting an object using the hydraulic jack 400a, there are not many kinds of tasks that cannot be performed at a low height. Therefore, if the object is initially raised at a high speed and then rises to an appropriate height, the height of the object is raised. It needs to be finely adjusted. In this case, according to the above-described feature of the present invention, in the state where only one shutoff valve is opened, the object is raised at a high speed within a relatively fast time, and then gradually increases as the number of shutoff valves that are opened increases with time. The rate of ascent may decrease. Therefore, even if the user always operates the hydraulic jack 400a with a constant magnitude of force, the user has the effect of varying the rising height of the object.

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

To this end, the hydraulic jack 400a according to some other embodiments may be further provided with a weight sensing means (not shown).

The weight sensing means (not shown) detects the weight of the object disposed above the hydraulic jack 400a and transmits the weight to the control means (not shown), and the control means (not shown) transfers the size of the detected weight to a predetermined critical section. The shutoff valves 4511a, 4511b, and 4511c of the shutoff valves may be determined according to the comparison result.

For example, if it is determined that the control means (not shown) is included in the first critical section in which the weight of the object is relatively light, all of the shutoff valves 4511a, 4511b, and 4511c are opened to open the pressure lever 430 of the user. The lifting height of the hydraulic jack 400 according to the rotation operation can be controlled to be relatively low. On the other hand, if it is determined that the control means (not shown) is included in the second critical section where the object is relatively heavy, one operation of the pressure lever 430 of the user by opening the at least one shutoff valves 4511a, 4511b, and 4511c. The lifting height of the hydraulic jack 400 can be controlled to be relatively low. This is because when the weight of the object is relatively light, the object may leave the hydraulic jack 400a in the ascending process, and when the weight of the object is relatively heavy, the possibility of leaving the hydraulic jack 400a in the ascending process is relatively low as well. This is because it requires a lot of lift.

As such, the hydraulic jack 400a according to another embodiment of the present invention may allow efficient work using the hydraulic jack 400a by varying the lifting force of the lifting piston 412 according to the type of object or the type of work. .

Figure 16 is a perspective view of a mobile lifting device equipped with a hydraulic jack according to another embodiment of the present invention.

Specifically, the movable lifting device 40 provided with the hydraulic jack according to another embodiment of the present invention includes a lower frame 810, an upper frame 820, a hydraulic jack 400, and a drop preventing unit 700.

At this time, the lower frame 810, the upper frame 820 and the hydraulic jack 400 constituting the movable lifting device 40 provided with a hydraulic jack according to another embodiment of the present invention shown in FIG. Since the same as the lower frame 810 and the upper frame 820 constituting the movable lifting device 20 provided with a hydraulic jack according to an embodiment of the present invention, repeated description will be omitted.

The fall prevention unit 700 is installed on both sides of the hydraulic jack 400 to support the upper frame 820 when the upper frame 820 falls to prevent the hydraulic jack 400 from being damaged.

In one embodiment, the fall prevention part 700 may include an elastic support part 500 and a load distribution part 600.

Referring to FIG. 17, the elastic support part 500 is installed on the upper side of the load distribution part 600 so as to prevent the falling object from colliding with the hydraulic jack 400 and the hydraulic jack 400 being damaged. When the fall is to support the upper frame 820 by using an elastic force, the support 510, a plurality of vibration absorbing portion 520, a plurality of connecting plates 530, a plurality of extension plates 540, It may include four pivots 550 and two support bars 560.

The support part 510 includes a first plate 511, a second plate 512, a third plate 513, and a fourth plate 514 formed of a plate having a “b” shape.

At this time, the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 are spaced apart from each other so as to face each other to form an "+" shape as a whole. The vibration absorbing unit 520 may be installed in each space spaced apart from each other to absorb vibrations transmitted to each plate.

The vibration absorbing part 520 is provided between each plate of the support part 510 and another plate, respectively, and absorbs a vibration.

In one embodiment, the vibration absorbing portion 520 may be formed by means of an elastic material such as a spring or rubber that can absorb shocks, provided that the vibration absorbing portion 520 is applied regardless of its name. This will be possible.

The connecting plate 530 may include a third plate 513 between the upper part of the first plate 511 and the upper part of the second plate 512, between the front end of the second plate 512 and the front end of the third plate 513. The first plate 511 is rotatably installed between the bottom of the bottom plate and the bottom of the fourth plate 514 and between the front end of the fourth plate 514 and the front end of the first plate 511. The second plate 512, the third plate 513, and the fourth plate 514 are connected to each other in a " + " form.

That is, the connecting plate 530 may not only interconnect the upper, lower, or front end of each plate to form an overall appearance, but also rotate each connecting portion to correspond to external vibrations or shocks. By adjusting the connection angle it is possible to more efficiently absorb vibration or shock.

That is, when the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 are fixed to each other by the connecting plate 530, the external vibration or impact to some extent It may be able to withstand, but when a critical vibration or a critical shock is applied, the connection plate 530 connected to each plate will be broken and it will not be able to perform its original function.

Accordingly, the connecting plate 530 according to the present invention, by connecting the first plate 511, the second plate 512, the third plate 513 and the fourth plate 514 to some extent possible movement. As described above, the fastening can be maintained more efficiently to vibration or shock than in the case described above.

The extension plate 540 includes an upper portion (ie, an upper wing) and a front end (ie, a front wing) of the first plate 511, an upper end and a front end of the second plate 512, and a front end of the third plate 513. The lower portion and the second portion extending from the lower portion and the front end of the fourth plate 514 to the rotating portion 550 for each plate in the upward or downward direction.

In one embodiment, the extension plate 540 may be rotated by the upper or lower is connected to the rotating shaft formed on one side of the rotating part 550.

In one embodiment, the extension plate 540, the second upper fastening groove (5113) or the second upper fastening groove (5113) or the second upper fastening groove (5113) so as to make a sliding movement in the vertical direction. A sliding groove 541 (see FIG. 18) in an up and down direction may be formed at a lower portion connected to the shear fastening groove 5115.

Rotating portion 550, the upper or lower portion of the two extending plate 540 extending from each plate is connected to each other and rotatably connected to each other, installed on each inner side of the support bar 560 facing each other ( Fastening means such as, for example, screw bolts, welding or rivets).

The support bar 560 is provided with an upper side or a lower side of the rotating part 550, and an upper support bar 560 positioned at an upper side thereof is spaced apart from the lower side of the upper frame 820 so that the upper frame 820 is located. When falling, it is supported, it is supported by the rotating part 550 to form a space spaced apart in the vertical direction so that each configuration of the elastic support 500 is installed.

When the upper frame 820 falls, the elastic support part 500 having the above-described configuration supports the upper frame 820 by using an elastic force, such that the falling object collides with the hydraulic jack 400 so that the hydraulic jack 400 is closed. To prevent breakage.

18 is a view illustrating the first plate of FIG. 17.

Referring to FIG. 18, the first plate 511 may include a plate body 5111, two first upper fastening grooves 5112, a second upper fastening groove 5113, and two first shear fastening grooves 5114. And a second shear fastening groove 5115.

The plate body 5111 is formed of a plate having a “b” shape, and forms two first upper fastening grooves 5112 and a second upper fastening groove 5113 in the upper wing, and two first upper fastening grooves in the front wing. The shear fastening groove 5114 and the second shear fastening groove 5115 are formed.

The first upper fastening groove 5112 is formed in the upper wing of the plate body 5111 formed in the upward direction to connect and install the front end of the connecting plate 530 so as to be rotatable.

The second upper fastening groove 5113 is formed between the first upper fastening grooves 5112 to connect and install a lower portion of the extension plate 540 so as to be rotatable.

The first shear fastening grooves 5114 are formed on the front blades of the plate body 5111 formed in the shear direction, and connect the upper ends of the connection plates 530 so as to be rotatable.

The second shear fastening groove 5115 is formed between the first shear fastening grooves 5114 to connect and install the lower portion of the extension plate 540 to be rotatable.

In one embodiment, the extension plate 540, the second upper fastening groove (5113) or the second upper fastening groove (5113) or the second upper fastening groove (5113) so as to make a sliding movement in the vertical direction. A sliding groove 541 in the up and down direction may be formed at a lower portion connected to the shear coupling groove 5115.

In addition, the connection plate 530 may also form a sliding groove having the same structure as the sliding groove 541 of the extension plate 540 described above.

The first plate 511 having the configuration as described above may be equally applied to the second plate 512, the third plate 513, or the fourth plate 514 that differ only in its installation position. The description of the second plate 512, the third plate 513, or the fourth plate 514 will be omitted.

According to the present invention, the support bar 560 of FIG. 17 may be manufactured with a plastic sheet having excellent moldability and strong durability than a plastic sheet manufactured using PET resin alone.

The plastic sheet which concerns on this invention is manufactured by the following plastic sheet manufacturing method.

Referring to Figure 19, the plastic sheet manufacturing method for producing a plastic sheet of the present invention 100 parts by weight of polyethylene telephthalate (polyethylene telephthalate, PET) resin, 2 to 4 parts by weight of polyurethane (polyurethane) dispersant, polyethylene dioxy 0.1 to 0.2 parts by weight of offen polystyrene sulfonate, polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, tree 0.1 to 0.3 parts by weight of ethyl amine (isopropyl alcohol), 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water are mixed to prepare a first composition (S110); A second step (S120) of preheating the mixed composition; A third step (S130) of removing moisture of the preheated mixed composition; A fourth step (S140) of heating the mixed composition from which moisture is removed; A fifth step (S150) of removing foreign substances of the heated mixed composition; A sixth step (S160) of manufacturing a plastic sheet by stretching while cooling the mixed composition from which foreign substances have been removed; And a seventh step of applying silicone to the plastic sheet and then drying it (S170).

According to the present invention, various additives may be mixed with a conventional PET resin, and preformed, dehumidified, heated, and cooled may be used to manufacture a plastic sheet having excellent moldability and durability.

The first step (S110) is a mixing step of the raw materials, the polyethylene terephthalate (polyethylene telephthalate, PET) resin as a base resin, polyurethane (polyurethane) dispersant, polyethylene dioxythiophene polystyrene sulfonate (polyethylene dioxythiophene polystyrene sulfonate ), Polystyrolsulfonic acid, N-methyl-2-pyrrolidone, triethyl amine, isopropyl alcohol and water Step.

PET resin is a basic resin, has excellent thermal stability and high crystallinity, can be recycled, and can be used in the form of a master batch. Polyurethane dispersants serve to improve the miscibility with other components. Polyethylene dioxythiophene polystyrene sulfonate, polystyrolsulfonic acid, N-methyl-2-pyrrolidone and triethyl amine Functions as an antistatic agent. Since the plastic sheet for manufacturing a plastic container is generally an electrical insulator, static electricity is generated by frictional charging, and if it is severely caused by discharge or electric conduction, it may lead to an explosion or fire, so it is preferable to add a charging agent. . Isopropyl alcohol acts as an antifogging agent. The antifogging agent can suppress water condensation caused by water vapor which may occur when the plastic container is manufactured using the plastic sheet to store fruits and the like.

In one embodiment, the above-described raw materials are based on 100 parts by weight of polyethylene telephthalate (PET) resin, 2 to 4 parts by weight of polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ) 0.1 to 0.2 parts by weight, 0.4 to 0.6 parts by weight of polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, triethyl amine (triethyl amine) 0.1 to 0.3 parts by weight, isopropyl alcohol (42) to 45 parts by weight of isopropyl and 50 to 52 parts by weight of water is preferably mixed. When added outside the above range, various problems may occur. In particular, in the case of the antistatic agent, when mixed over each range, the plastic surface to be produced may be sticky, the sealing and printability may be reduced, in the case of white plastic, yellowing may occur.

In addition, the first step (S110) may be further mixed with various additional ingredients to the raw materials to enhance the functionality of the plastic sheet.

In one embodiment, the boron-based binder may be further mixed. The boron (B) -based binder is used to combine the respective components, the boron-based binder is preferably mixed in 2 to 10 parts by weight with respect to 100 parts by weight of PET resin. When the content of the boron-based binder is less than 2 parts by weight, the raw materials and the like cannot be effectively bound, and when the content of the boron-based binder exceeds 70 parts by weight, it is uneconomical.

In one embodiment, the garlic extract may be further mixed. Garlic extract is a natural adhesive component, and functions as a binder to improve the compatibility with other components along with the boron-based binder. The garlic extract is peeled and crushed garlic, 2 to 3 parts by weight of water per 1 part by weight of garlic, heated at 80-100 ℃ for 5 hours or more, the liquid component is extracted and filtered, and then filtered It can be prepared by concentrating the liquid component at 55 ~ 60 ℃. Garlic extract is preferably mixed 5 to 10 parts by weight with respect to 100 parts by weight of PET resin. If the content of the garlic extract is less than 5 parts by weight, the raw materials may not be properly entangled and the surface may not be formed evenly during plastic sheet production.If the content of the garlic extract is more than 10 parts by weight, the dispersibility and mixing properties of each component are rather There is a risk of deterioration.

In one embodiment, the apatite powder may be further mixed. The apatite powder functions as a filler and can maintain the shape of the plastic sheet to improve workability, maintain strength, and improve corrosion resistance. Apatite is an inorganic substance present in bone, and in order to use it as a filler, it is important to have a small particle size, high residual amount of carbonic acid, and low crystallinity. Preferably the size of the apatite granules is 200-400 μm. For this purpose, it is important to go through the sintering process at 500 ~ 700 ℃. When sintering at less than 500 ℃, there is a disadvantage that the size and crystallinity of the desired granules can not be obtained, when sintering above 700 ℃ has a disadvantage that the residual amount of carbonic acid groups is low, crystallinity is too high. The apatite powder is preferably mixed at 20 to 30 parts by weight with respect to 100 parts by weight of the PET resin. If the content of the apatite powder is less than 20 parts by weight, there is a disadvantage that the adhesive strength is lowered, and if it exceeds 30 parts by weight, the impact resistance is weakened.

In one embodiment, the cork powder may be further mixed. Cork powder, together with the apatite powder, can improve the durability of the plastic sheet. Cork powder can be prepared by removing the bark of the oyster oak, and then grinding. As cork powder, it is preferable to use finely ground particles filtered into a mesh of 400 mesh or more for mixing with PET resin and the like. Cork powder is preferably mixed in 15 to 25 parts by weight based on 100 parts by weight of PET resin. If the cork powder is less than 15 parts by weight, the degree of improvement of durability is insignificant, and if it exceeds 25 parts by weight, voids may be formed inside the plastic during manufacture, so durability may be rather deteriorated.

In one embodiment, the hermit extract may be further mixed. The hermit extract not only acts as an antimicrobial agent, but also suppresses yellowing that may occur in white plastic sheets. Rumex crispus is a plant in the genus Rumex that grows in Korea. The hermit is a perennial herb that grows well in humid places around the country and uses young shoots for edible in the private sector. It is used as an adjuvant therapy for tumors and cancer. The hermit extract extracted from the hermit has antimicrobial and antioxidant effects against various microorganisms, and when used in combination with a small amount of sulfur, it has an excellent effect on skin itching. It is reported that useful components of the oxalic acid include saponins, tannins, flavonoids, essential oils and anthraquinone derivatives such as chrysophanol and emodin. The hermit extract is washed well with the collected hermit, dried in the shade and broken up into ground parts (except roots) and underground parts (root parts), and extracted with 80% (v / v) methanol for 3 days. After immersion, the extract can be filtered with a membrane filter (porosity 0.5 μm) to separate the solids, and the methanol extract can be prepared by concentrating at 50 ° C. using a rotary evaporator. The hermit extract is preferably mixed at 3 to 8 parts by weight based on 100 parts by weight of the PET resin. When the content of the hermit extract is less than 3 parts by weight, the antimicrobial activity is insignificant in the anti-yellowing effect, when it exceeds 8 parts by weight is uneconomical.

The second step (S120) is a step of preheating the mixed composition, by applying heat to the mixed raw materials to ensure that the raw materials are stably mixed first.

The third step (S130) is a dehumidification step of removing moisture present in the preheated mixed composition, dehumidification is preferably made in a temperature range of 150 ~ 180 ℃. If it is below or exceeding the above range, dehumidification is insufficient or may adversely affect the durability of the plastic.

The fourth step (S140) is a step of heating the mixed composition from which moisture is removed, and after melting the mixed composition, the heating temperature is preferably controlled to 260 to 270 ° C.

The fifth step (S150) is a step of removing foreign matters from the heated mixed composition, and may remove foreign matters inside the mixed composition by passing a screen having a mesh shape.

The sixth step (S160) is a step of producing a plastic sheet by stretching while cooling the mixed composition from which foreign matters are removed, and stretching in two stages using a cooling roll. The primary stretching is made in the longitudinal direction through the cooling roll maintained at 16 ~ 17 ℃, the secondary stretching is made in the width direction (vertical direction in the longitudinal direction) through the cooling roll maintained at 20 ~ 23 ℃. The reason for raising the temperature of the secondary stretching above the primary stretching temperature is to prevent the plastic sheet to be solidified and to deteriorate in formability, and to improve the durability and formability of the plastic sheet by alternately stretching the longitudinal direction and the width direction. You can.

In the seventh step S170, after the silicone is coated on the plastic sheet, the silicone sheet may be dried, and the silicon may be coated to finish the treatment and at the same time, an antistatic effect may be obtained. It is preferable to apply | coat silicone using the coating liquid diluted to the concentration range of 5-25%, and apply | coat silicone, and it is preferable to dry at 160-215 degreeC. In addition, it is preferable to mix the above-mentioned anti-fogging agent component with the coating liquid containing silicone in order to suppress the water phenomenon formed in the manufactured plastic container.

Hereinafter, the configuration of the present invention and its effects through specific examples and comparative examples will be described in more detail. However, this embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

[Examples and Comparative Examples]

To prepare a mixed composition according to the composition of Table 1, after the preheating, dehumidification, heating, removing foreign matters, cooling and stretching, drying step to prepare a plastic sheet to prepare an example and a comparative example. Each material used commercially available material, and for the garlic extract and the hermit extract were prepared as described in the detailed description of the invention.

TABLE 1

Experimental Example 1

The compositions of Examples 1 to 3 and Comparative Examples were secondly stretched to prepare a 10 mm thick plastic sheet, and the uniformity of the sheet surface was measured and described in Table 2 below. At this time, the primary stretching was 16 ° C, and the secondary stretching was 21 ° C. Uniformity was measured using a laser sensor (N2 laser, oscillation wavelength 337.1nm, UDHO Laser. LTD., Japan), and 30 surface points were randomly selected to measure their surface roughness (standard deviation was used. , ± 0.3 or less were uniform, and more than ± 0.3 was evaluated as nonuniform. At this time, Examples 1-3 were extended in the width direction after extending | stretching in the longitudinal direction, and the comparative example extended | stretched only in the longitudinal direction.

TABLE 2

As in Table 2, in the case of Examples 1 to 3, both uniformity was superior to the comparative example.

Experimental Example 2: Torsion Test

The compositions of Examples 1 to 3 and Comparative Examples were secondly stretched to prepare a plastic sheet having a thickness of 2 mm, and then molded to prepare 100 plastic products, evaluated for completeness, and are shown in Table 3 below. At this time, Examples 1-3 were extended in the width direction after extending | stretching in the longitudinal direction, and the comparative example extended | stretched only in the longitudinal direction.

TABLE 3

As shown in Table 3, in Examples 1 to 3, more than 90% of the normal product can be made, but the comparative example has a relatively high defective rate.

Experimental Example 3: Yellowing Test

The compositions of Examples 1 and 3 were secondly stretched to prepare plastic sheets having a thickness of 2 mm, and then molded to prepare 100 white plastic products, which were visually observed for discoloration after 10 months, and are shown in Table 4 below. It was. At this time, the part which turned yellow was evaluated as defect.

TABLE 4

As shown in Table 4, in the case of Example 3, it was confirmed that almost all products did not discolor. On the other hand, Example 1 obtained good results, but the discoloration rate was relatively higher than that of Example 3.

Experimental Example 4: Antifog Test

After stretching the composition of Comparative Example and Example 3 to prepare a plastic sheet having a thickness of 2mm, and then molded by molding 100 white plastic products, after storing the spinach inside, after 1 day visually observed the inside It is shown in Table 5 below.

TABLE 5

As in Table 5, in the case of Example 3, almost no water droplets were formed, the comparative example was confirmed that the water droplets are enough to be identified with the naked eye.

The support bar 560 made of the above-described plastic sheet of the quality can be improved in durability and excellent moldability than when manufactured by using the PET resin alone.

Accordingly, when the support bar 560 is worn or damaged due to continuous vibration, it is possible to easily rebuild and replace using the above-described plastic sheet to ensure continuous use of the device.

Referring to FIG. 20, the load dispersing part 600 is installed below the support part 630 supporting the lower side of the elastic support part 500, and has a hollow housing 610 therein and a hollow part 615. Ground ball having a plurality of support small balls 620 placed in the portion 615, and a fixing bolt 646 extending in an upward direction from the center of the ground plane 645 and the ground plane 645 on the top ( 640).

The load spreading part 600 may disperse and partially absorb the load applied from the outside, and transmit a load q smaller than the load P applied from the outside.

The load distribution unit 600 distributes the load applied from the outside of the ball housing 610 inside the ball housing 610 and finally transmits a load smaller than the load applied from the outside of the ball housing 610. . The load applied from the outside of the ball housing 610 is distributed by the plurality of supporting small balls 620 and the ground ball 640 located in the hollow part 615, and a part of the load is distributed to the ball housing 610. The inner wall may be dispersed while pressing, and the remaining load may be transmitted to the outside of the ball housing 610.

The ball housing 610 may be fixed to the surface by using concrete, etc., and a hollow portion 615 in which a plurality of supporting small balls 620 and ground balls 640 are accommodated may be provided therein. .

The ball housing 610 is a material having a certain strength of iron, concrete, wood, plastic, etc. to support the load distributed by the action between the plurality of supporting small balls 620 and the ground ball 640 disposed therein It may be made of.

The ball housing 610 may be formed in various shapes such as a polyhedron or a sphere, and the hollow part 615 may be formed in a spherical shape corresponding to the shape of the ground ball 640.

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

The plurality of supporting small balls 620 may be regularly arranged and received to be in contact with each other along the outer circumferential surface of the hollow part 615. The ground ball 640 may be accommodated in the hollow part 615 in a state in which the ground ball 640 is placed on the plurality of small balls for support 620, and may be supported in a point contact state with the plurality of small balls for support 620.

As described above, the plurality of supporting small balls 620 and the ground ball 640 are regularly arranged so that the outer circumferences are in contact with each other, and the external load is caused by the contact points between the plurality of the supporting small balls 620 and the ground balls 640. Dispersion of the external load may occur while pressing the inner wall of the hollow portion 615, ie, the ball housing 610, which is transmitted and finally located at the outermost side. At this time, in the present embodiment, the plurality of small balls for support 620 are regularly arranged, and the ground balls 640 are arranged on the plurality of small balls for support 620, thereby arranging the plurality of small balls for support. The number of contact points between the 620 and the ground ball 640 may be increased, and load transfer may be regulated to increase the load transfer effect between each other. In addition, the ground ball 640 is supported in a point contact state by the plurality of supporting small balls 620, it is possible to minimize the wear.

The plurality of supporting small balls 620 and the ground ball 640 may be made of a material having strength to withstand the load due to the contact point with each other, for example, may be made of iron, concrete, wood, plastic, etc. have.

On the other hand, the ground ball 640 may be provided with a ground plane 645 on the top. A fixing bolt 646 is installed at the center portion of the ground plane 645 to be inserted into the lower side of the support portion 630 so that the support portion 630 is fixed to the ground ball 640.

At this time, the fixing bolt 646 may be formed in a flat pattern without forming a separate protrusion on the outside, but by forming a thread along the outer surface (that is, a shape such as a piece of nail), the lower side of the support portion 630 It would be desirable to tighten more strongly.

As such, the load distribution unit 600 is installed below the elastic support part 500 to support the elastic support part 500, thereby ensuring the support stability of the upper frame 820 as described above by the elastic support part 500. can do.

The scope to be protected by this specification is indicated by the following claims rather than the detailed description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents.

1: Workpiece 2: Bolt 10: Automatic bolt fastener
20, 30, 40: movable lifting device with hydraulic jack
50: transfer device 100: lifting unit
110: shelf 120: lifting piston
130: detection sensor 200: holding device
210: housing 220: drive part
230: connection link 240: gripping link
241: body frame 242: insertion groove
243: fastening pad 300: bolting device
310: support ahead 320: sliding frame
330: bolting bunch

Claims (2)

The workpiece is formed on one side or both sides of the bolt that needs to be fastened is seated on the upper side, and includes a lifting unit for elevating the workpiece to be seated bolted to the upper side, or to lower the workpiece to be fastened bolts,
A gripping device which is installed on an upper side of the elevating unit, and grips both sides of the workpiece when the bolt is fastened when the workpiece is elevated by the elevating unit; And a bolting device spaced apart from the upper side of the lifting unit and rotating the bolt so that the bolt can be fastened to the workpiece when the workpiece is lifted by the lifting unit.
The lifting unit, the shelf on which the workpiece is seated on the upper side; A plurality of lifting pistons installed at a lower side of the shelf and extending or contracting in a vertical direction to lift or lower the shelf; And installed on one side of the shelf, and includes a detection sensor for detecting whether the workpiece is seated on the shelf,
The gripping apparatus, the housing is formed in the form of a hollow "ㅁ"; A driving unit which is formed in a “형태” shape and has an upper portion penetrated and connected to an upper portion of the housing and is driven in an up and down direction in an inner space of the housing; Two connection links which are formed in a horizontal direction in the inner space of the housing and each one side of which is connected to the lower one side or the other side of the driving unit to be rotatable; And "

" or "

", Each upper portion is rotatably connected to the other side of each of the two connecting links, and the lower portion is rotatably connected to the housing, and the driving portion is opposed to each other when driven in the downward direction Two lower gripping links that move in a direction closer to each other to grip the workpiece, and when the driving unit is driven upward, two gripping links that move toward each other to move away from each other in a direction away from each other Including;
The connection link is installed to be inclined downward while going from one side connected to the driving unit to the other side.
The gripping link is "

" or "

"Body frame formed in the form; Insertion groove formed in the lower side of the body frame facing the body frame of the other gripping link so that the projection formed in the front end of the bolting device; And in the lower portion of the insertion groove A fastening pad formed to fasten the workpiece,
The bolting device, the support shelf is spaced apart from the upper side of the lifting unit; A sliding frame connected to the lower side of the support shelf and slidingly moving in the direction of the workpiece when the workpiece is lifted by the lifting portion; And a bolting bundle installed at the front end of the sliding frame and rotating the bolt so that the bolt can be fastened to the workpiece.
The support shelf is spaced apart from the upper side of the lifting unit, the sliding frame is installed on the lower side to support the sliding movement,
The sliding frame is connected to the lower side of the support shelf, and when the workpiece is lifted by the lifting unit to slide in the direction of the workpiece to be fastened to the bolting bolts bolts,
The bolting bundle is installed at the front end of the sliding frame, and moves together according to the sliding movement of the sliding frame, and then rotates the bolt by itself so that the bolt can be fastened to the workpiece,
A movable lifting device having a hydraulic jack for elevating the workpiece corresponding to the elevated height of the shelf so as to move the workpiece to the shelf of the elevating portion in an elevated state; And a conveying apparatus for moving the workpiece to the lathe of the lifting unit in a state of holding and lifting the workpiece lifted by the movable lifting device provided with the hydraulic jack.
The movable lifting device equipped with the hydraulic jack may include a lower frame having a moving means disposed on a lower surface thereof and at least one column having a variable length on the upper surface thereof; An upper frame supported by the at least one pillar and disposed in parallel with the lower frame; And a hydraulic jack installed between the lower frame and the upper frame to lift and lower the upper frame using an external force provided by a user to lift and lower an object seated on the upper frame. When a plurality of forming molds to form a different form of the pattern is loaded, it includes a hydraulic jack for lifting or lowering the loaded forming mold in the vertical direction or transported to another place according to the user's needs,
The hydraulic jack may include a main body in which a working fluid is stored and an inner cylinder and a lifting piston are disposed; Is installed on the outside of the main body is in communication with the main body to maintain a closed state, there is a pressure piston is formed therein, the working fluid is sucked as the pressure piston is raised and the suction sucked as the pressure piston is lowered An outer cylinder providing a working fluid to the inner cylinder; A pressure lever connected to a pressure piston disposed inside the outer cylinder to transfer an external force provided from a user to the pressure piston; And a release valve for releasing the pressure of the inner cylinder according to a user's operation to recover the working fluid introduced into the inner cylinder to the main body.
The outer cylinder may be provided in plurality, wherein the plurality of outer cylinders may include a first outer cylinder formed along a central axis coaxial with the pressure lever and at least one second outer cylinder disposed around a diameter of the first outer cylinder. Wherein the sum of the diameters of the first outer cylinder and the at least one second outer cylinder is one third or less of the diameter of the inner cylinder,
The first outer cylinder and at least one second outer cylinder is connected to the main body through an inlet pipe for introducing the working fluid stored in the main body into the inside,
The hydraulic jack further includes control means for selectively opening and closing a plurality of inlet pipes formed in each of the first outer cylinder and the at least one second outer cylinder to vary the lifting force of the pressure piston.
The control means opens only one of the inflow pipes from the time of the first operation of the hydraulic jack until the pressure lever is operated a predetermined number of times, and then the plurality of inflow pipes from the time of the operation of the pressure lever more than a predetermined number of times. Controls to open
The movable lifting device provided with the hydraulic jack further includes a drop prevention unit installed at both sides of the hydraulic jack to support the upper frame when the upper frame falls, thereby preventing the hydraulic jack from being damaged.
The fall prevention part includes an elastic support part and a load distribution part,
The elastic support portion is installed on the upper side of the load distribution unit to prevent the falling object collides with the hydraulic jack to damage the hydraulic jack to support the upper frame using the elastic force when the upper frame falls,
The load distribution unit is installed below the elastic support to support the lower side of the elastic support, the ball housing is provided with a hollow inside, a plurality of small balls for support placed in the hollow and the ground plane and the upper Automatic bolt fastening device comprising a grounding ball having a fixing bolt extending in an upward direction from the center of the ground plane.
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