KR102465545B1 - Lifter using screw-jack - Google Patents

Abstract

Disclosed is a lifter using a screw jack to enhance durability while preventing noise generation. The lifter using a screw jack comprises: at least one pair of guide shafts erected while being separated by a set distance; ball screws erected while being arranged to correspond to the guide shafts in a one-to-one manner and circumferentially rotated in one direction or the other direction by a power source; outer transport members provided on the guide shafts to be axially moved back and forth; inner transport members provided on the ball screws to be axially moved back and forth; a carrier axially inserting a set number of the ball screws and connected to the inner transport members corresponding to the axially inserted ball screws to be moved in the same direction by the simultaneous rotation of the ball screws; and an aligner preventing expected life from not being reached by unnecessary degradation in the guide shafts or guide rails and ball nuts by connecting the corresponding outer transport members and inner transport members to prevent noise if the corresponding guide shafts and/or ball screws are arranged to be axially inclined.

Description

Lifter using a screw jack {LIFTER USING SCREW-JACK}

The present invention relates to a lifter using a screw jack, and more particularly, an aligner is provided on a nut that moves a carrier up and down along a pair of erected ball screws, and the aligner is erected adjacent to each of the ball screws through the aligner. As the guide shaft is connected, the aligner mounted on the ball nut can realize ultra-precise leveling despite the change in parallelism of the guide shaft and (LM) guide rail based on the screw, and in case of four-point support installation, inevitably 1 Due to the difference in height of the point support, the clearance between the carrier and the ball nut is corrected to maintain the leveling of the carrier, and it moves along the guide shaft by realizing the alignment of the gap due to the gradual widening or narrowing of the paired ball screw and guide shaft. It relates to a lifter using a screw jack to increase durability while preventing noise generation by preventing a ball nut from being affected by a ball bush or a guide block moving along a guide rail.

In general, a lifter is used when lifting and lowering cargo in an automated logistics device using a conveyor system. In this lifter, a cylinder is installed in the center of the floor and ball bush-type guide shafts are installed on both sides of the lifter. A ball screw jack method for supporting the support plate or an X-link method for supporting the support plate by a cylinder mounted in the center of the floor and cross-type support links on both sides thereof are adopted.

As a related technology, it has been proposed in Korean Utility Model Registration Publication No. 20-0261876 (Registration date: 2002.01.12. Name of design: Lifter balance device for cargo transportation in automated warehouses).

The above technical configuration is a background art for helping understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

As both sides of the support plate that is moved up and down by the ball screw jack are connected to a nut that moves linearly in the axial direction of a pair of guide shafts, the thread of the nut in the case of a ball nut and a trapezoidal nut is There is a problem in that it is easily worn, the lubricant is discolored in a short time, thereby generating vibration and noise, and the life of the nut is rapidly reduced due to the deterioration of the lubricant in a short time.

Therefore, there is a need to improve this.

The present invention has been made to improve the above problems, and a carrier is connected to and supported by each nut of a pair of erected ball screws, and reciprocating movement is possible on each guide shaft while the guide shaft is erected to correspond to each of the ball screws. The aligner mounted on the ball nut is connected to the guide shaft and the (LM) guide by connecting the bracket and the carrier to the aligner in a state where the nut is provided with the aligner and the nut is connected with the bracket. Despite the change in parallelism of the rail, leveling can be realized with high precision, and when installing the 4-point support, a height difference between the 1-point support inevitably occurs, so the gap between the carrier and the ball nut is corrected to maintain the leveling of the carrier and By realizing gap alignment according to the gradual widening or narrowing of the ball screw and guide shaft, noise is prevented by preventing the ball nut from being affected by the ball bush moving along the guide shaft or the guide block moving along the guide rail. The purpose is to provide a lifter using a screw jack to increase durability while doing so.

A lifter using a screw jack according to the present invention includes: at least one pair of guide shafts erected apart from each other by a set interval; a ball screw that is erected while being disposed in a one-to-one correspondence with the guide shaft and is rotated in a circumferential direction along one direction or the other direction by a power source; an outer conveying member provided to each of the guide shafts to be reciprocally movable along an axial direction; an inner conveying member provided to each of the ball screws to be reciprocally movable along an axial direction; a carrier into which a set number of the ball screws are respectively inserted, connected to the inner transfer member corresponding to the shaft-inserted ball screws, and moved in the same direction by simultaneous rotation of the ball screws; and when the axial direction of at least one of the corresponding guide shaft and the ball screw is inclined by connecting the corresponding outer conveying member and the inner conveying member, the conveying noise of the outer conveying member relative to the guide shaft Or an aligner to prevent noise from the inner conveying member relative to the ball screw.

The inner conveying member is a tubular nut screwed to each of the ball screws, and the aligner is connected to the outer conveying member corresponding to each of the inner conveying members.

The aligner may include an upper aligning unit provided on one side of the inner transfer member with respect to the moving direction and supporting the carrier to correct and guide the eccentric carrier; and a lower aligning unit that self-corrects and guides when a distance difference between the corresponding outer and inner conveying members occurs along the axial direction of the ball screw while being connected to the other side of the inner conveying member in the moving direction.

The upper aligning unit includes: an upper side aligning pad fixed to the inner conveying member and inserting the inner conveying member; an upper aligning pad disposed opposite to the aligning pad on one side of the upper by axially inserting the inner conveying member and fixed to the carrier; an upper one-side curved surface portion in which a surface of the upper one-side aligning pad facing the other upper-side aligning pad is formed to be curved; and an upper other curved surface portion in which a surface of the upper other side aligning pad is formed to be curved so as to make surface contact with the upper one side curved surface portion to allow posture correction of the upper one side aligning pad with respect to the upper one side aligning pad. .

The upper aligning unit may include a connecting block having one side in contact with one side of the upper aligning pad and the other side in contact with the other side of the upper aligning pad; One-side joint pin connecting the upper one-side aligning pad and the connecting block to bind the upper one-side aligning pad and the connecting block or limit the movement of the upper one-side aligning pad; and an other joint pin connecting the other upper aligning pad and the connecting block to restrict movement of the other upper aligning pad.

The lower aligning unit may include a bracket fixed to the outer transfer member corresponding to one side and inserting the ball screw corresponding to the other side; a sleeve for inserting the ball screw and inserted into the bracket; an aligning plate for inserting and mounting the sleeve to permit movement in a plane; a fixing plate coupled to each other while being disposed between the aligning plate and an edge provided on the inner conveying member corresponding to the aligning plate in order to prevent the shaft-inserted sleeve from coming off; and detachably coupling the sleeve protruding to the other side of the aligning plate, and by being bound to the bracket, the distance difference according to the movement of the outer and inner conveying members forming a pair is transferred to the corresponding inner conveying member. and a coupling plate that compensates for the movement of the sleeve for movement.

The sleeve is characterized in that the flange is extended to form an edge.

The aligning plate may form an accommodating hole having a larger area than the planar area of the flange, and may include a locking step to prevent the flange accommodated in the accommodating hole from being separated from the other side.

As described above, the lifter using the screw jack according to the present invention is provided with an aligner on a nut that moves the carrier up and down along a pair of ball screws erected unlike the prior art, and each ball screw is moved through the aligner. By connecting the guide shaft standing adjacent to the aligner, the aligner mounted on the ball nut can achieve ultra-precise leveling despite the change in parallelism of the guide shaft and (LM) guide rail based on the screw, and the 4-point support installation The leveling of the carrier is maintained by correcting the gap between the carrier and the ball nut as the height difference of the one-point support inevitably occurs when the guide is By preventing the ball nut from being affected by a ball bush moving along a shaft or a guide block moving along a guide rail, it is possible to increase durability while preventing generation of noise.

1 is a perspective view of a lifter using a screw jack according to an embodiment of the present invention.
2 is a front view of a lifter using a screw jack according to an embodiment of the present invention.
3 is an enlarged perspective view of a main part of a lifter using a screw jack according to an embodiment of the present invention.
4 is an exploded perspective view of a main part of a lifter using a screw jack according to an embodiment of the present invention.
5 is an exploded perspective view of the lower part of a lifter using a screw jack according to an embodiment of the present invention.
6 is a longitudinal sectional view of a main part of a lifter using a screw jack according to an embodiment of the present invention.
7 is a cross-sectional view of a lifter using a screw jack according to an embodiment of the present invention.
8 is a cross-sectional view showing a correction state of an aligner of a lifter using a screw jack according to an embodiment of the present invention.

Hereinafter, an embodiment of a lifter using a screw jack according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or operator. Therefore, definitions of these terms will have to be made based on the content throughout this specification.

1 is a perspective view of a lifter using a screw jack according to an embodiment of the present invention, and FIG. 2 is a front view of a lifter using a screw jack according to an embodiment of the present invention.

3 is an enlarged perspective view of main parts of a lifter using a screw jack according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of main parts of a lifter using a screw jack according to an embodiment of the present invention, and FIG. It is an exploded perspective view of the lower part of the lifter using a screw jack according to an embodiment.

6 is a longitudinal cross-sectional view of main parts of a lifter using a screw jack according to an embodiment of the present invention, FIG. 7 is a cross-sectional view of a lifter using a screw jack according to an embodiment of the present invention, and FIG. 8 is an embodiment of the present invention. It is a cross-sectional view showing the correction state of the aligner of the lifter using the screw jack according to the example.

1 to 8, a lifter 10 using a screw jack according to an embodiment of the present invention includes guide shafts 12 and 14, ball screws 22 and 24, an external transfer member 32, 34), inner transfer members 42 and 44, a carrier 50 and an aligner 100.

In particular, the lifter 10 according to the present invention serves to lift and lower cargo or semiconductor panels in an automated logistics device.

The guide shafts 12 and 14 are erected while being fixed to the floor or a fixture (not shown) at a set interval. At this time, it is assumed that at least one pair of guide shafts 12 and 14 is disposed. For convenience, the guide shaft is composed of one first guide shaft 12 and one second guide shaft 14.

Of course, the first guide shaft 12 and the second guide shaft 14 can be deformed into various shapes.

In addition, the ball screws 22 and 24 are disposed in a one-to-one correspondence with the first guide shaft 12 and the second guide shaft 14 and are fixed in an upright state. Thus, the ball screw is composed of a first ball screw 22 paired with the first guide shaft 12 and a second ball screw 24 paired with the second guide shaft 14 .

In addition, the first ball screw 22 and the second ball screw 24 are rotated in the same direction by driving sources 23 and 25, respectively.

That is, the first ball screw 22 is rotated in one direction and the other direction along the circumferential direction by the first driving source 23, and the second ball screw 24 is rotated along the circumferential direction by the second driving source 25. It is assumed that the first ball screw 22 and the second ball screw 24 rotate in the same direction. Of course, the first ball screw 22 and the second ball screw 24 may be rotated in different directions.

At this time, the first drive source 23 and the second drive source 25 can be applied in various ways, such as gear assemblies, respectively.

In addition, the outer conveying members 32 and 34 are provided on each of the first guide shaft 12 and the second guide shaft 14 to be reciprocally movable along the axial direction. That is, the first guide shaft 12 guides the first outer conveying member 32 for reciprocating movement in the axial direction, and the second guide shaft 14 guides the second outer conveying member 34 for reciprocating movement in the axial direction. do.

In particular, the first outer conveying member 32 is connected to the first guide shaft 12 to be simply moved and guided, and the second outer conveying member 34 is connected to the second guide shaft 14 to be simply moved and guided.

Of course, the first outer conveying member 32 and the second outer conveying member 34 are ball bushes that can be deformed into various shapes, and the first guide shaft 12 and the second guide shaft ( When moving along 14), you can receive assistance force. The corresponding outer conveying members 32 and 34 and the guide shafts 12 and 14 can be applied as LM guides.

In addition, the inner conveying members 42 and 44 are provided to each of the ball screws 22 and 24 to be reciprocally movable along the axial direction. That is, the first ball screw 22 guides the first inner conveying member 42 for reciprocating movement in the axial direction, and the second ball screw 24 guides the second inner conveying member 44 for reciprocating movement in the axial direction. do.

The first inner transfer member 42 is a nut screwed to the first ball screw 22 in a state in which the first ball screw 22 is axially inserted, and the second inner transfer member 44 is a second ball screw ( 24) is screwed together with the second ball screw 24 in a shaft-inserted state.

The first inner conveying member 42 and the second inner conveying member 44 can be applied in various shapes and materials.

In addition, the carrier 50 is connected to the first inner transfer member 42 and the second inner transfer member 44 moving along the first ball screw 22 and the second ball screw 24 . Thus, the carrier 50 moves along the axial direction of the first ball screw 22 while being supported by the set first inner conveying member 42 and the second inner conveying member 44 .

At this time, the carrier 50 inserts the first ball screw 22 and the second ball screw 24 into a simple shaft. Thus, the carrier 50 is movable along the axial direction of the first ball screw 22 .

In particular, the carrier 50 inserts the first ball screw 22 on one side along the axial direction and inserts the second ball screw 24 on the other side. So, based on the axial direction of the carrier 50, the first guide shaft 12 and the first ball screw 22 are disposed in pairs on one side, and the second guide shaft 14 and the second ball on the other side Screws 24 are arranged in pairs.

And, the carrier 50 is formed in various ways such as a plate, bar, or carriage, and serves to transport items (not shown) up and down. Accordingly, the carrier 50 must be maintained horizontally with respect to the floor or maintained in a direction perpendicular to the central axis of the first ball screw 22 and the central axis of the second ball screw 24 .

In addition, the first outer conveying member 32 and the first inner conveying member 42 are connected for interlocking guidance, and the second outer conveying member 34 and the second inner conveying member 44 are linked for interlocking guidance.

At this time, the first inner conveying member 42 of the first ball screw 22 does not exert an external force (load) that is pulled or pushed in a lateral or diagonal direction with respect to the screw coupling surface with the first ball screw 22. The central axis of the first inner conveying member 42 must coincide with the central axis of the first guide shaft 12 and the central axis of the first ball screw 22 must be constant (uniform).

Similarly, the second inner conveying member 44 of the second ball screw 24 prevents an external force (load) from being pulled or pushed in a lateral or diagonal direction with respect to the screw coupling surface with the second ball screw 24. The central axis and the central axis of the second inner conveying member 44 must match, and the central axis of the second guide shaft 14 and the central axis of the second ball screw 24 must be constant (uniform).

In addition, the first ball screw 22 and the second ball screw 24 should be maintained in a parallel state.

Through this, when the first inner transfer member 42 linearly reciprocates along the first ball screw 22, noise on the screw coupling surface is prevented, and the second inner transfer member 44 moves the second ball screw 24. ), the occurrence of noise on the screw coupling surface is prevented during linear reciprocation.

In addition, as the first inner transfer member 42 and the second inner transfer member 44 are moved while maintaining the same height, the carrier 50 remains level with respect to the floor (without tilting to either side). moves up and down

However, at least one of the first guide shaft 12, the first ball screw 22, the second guide shaft 14, and the second ball screw 24 is inclined during the initial installation work or after a long period of time. .

In this case, the distance between the first guide shaft 12 and the first ball screw 22 gradually narrows or moves away from each other as it goes upward along the axial direction, or the second guide shaft 14 and the second ball screw As (24) goes upward along the axial direction, the mutual spacing gradually narrows or becomes distant.

As a result, at least one of the first inner conveying member 42 and the second inner conveying member 44 corresponding to the ball screws 22 and 24 may generate noise while moving, and the guide shafts 12 and 14 At least one of the first outer conveying member 32 and the second outer conveying member 34 corresponding to ) may generate noise during movement.

Accordingly, the durability of at least one of the outer conveying members 32 and 34 and the inner conveying members 42 and 44 is reduced, and the carrier 50 moves up and down while tilting.

To prevent this, an aligner 100 is provided.

That is, the aligner 100 connects the first outer transfer member 32 and the first inner transfer member 42, and connects the second outer transfer member 34 and the second outer transfer member 34, Reduce the load in the lateral or diagonal direction applied to the first inner transfer member 42 relative to the first ball screw 22 and to the second inner transfer member 44 relative to the second ball screw 24 It serves to reduce the load in the lateral or diagonal direction.

In addition, when the aligner 100 is disposed inclined in the mutual axial direction, such as the distance between the corresponding guide shafts 12 and 14 and the ball screws 22 and 24 gradually narrowing or widening, the first guide shaft ( 12) serves to reduce the internal stress or noise of the first outer transfer member 32 and the internal stress or noise of the second outer transfer member 34 relative to the second guide shaft 14.

In other words, in the aligner 100, the first guide shaft 12 and the first ball screw 22 are not arranged side by side or the second guide shaft 14 and the second ball screw 24 are not arranged side by side. How to naturally adjust the distance difference between the first inner transfer member 42 and the first outer transfer member 32 or the distance difference between the second inner transfer member 44 and the second outer transfer member 34 according to the Inning guide, interlocked with this, serves to guide leveling to prevent tilting of the carrier 50.

In particular, the first inner conveying member 42 and the second inner conveying member 44 are tubular nuts screwed to the corresponding first ball screw 22 and second ball screw 24 . Therefore, the central axis of the first inner conveying member 42 and the central axis of the first ball screw 22 always coincide, and the central axis of the second inner conveying member 44 and the central axis of the second ball screw 24 are always match

In addition, the aligner 100 is connected to the first outer transfer member 32 while being provided in the first inner transfer member 42, while being provided in the second inner transfer member 44 and the second outer transfer member ( 34) is connected.

In detail, the aligner 100 includes an upper aligning unit 110 and a lower aligning unit 120 .

The upper aligning unit 110 corrects and guides the inclined (eccentric) carrier 50 while being supported by the first inner transfer member 42 and the second inner transfer member 44, respectively, in a horizontal state. play a role

In addition, the lower aligning unit 120 includes a first inner transfer member 42 and a first outer transfer member forming a pair along the axial direction of the first ball screw 22 while being connected to the first inner transfer member 42 (32) self-correction guide by the distance difference between the second inner conveying member 44 and the second inner conveying member 44 forming a pair along the axial direction of the second ball screw 24 while connected to the second inner conveying member 44. It serves to guide self-correction by the distance difference between the outer conveying members 34.

To this end, the upper aligning units 110 respectively provided in the first inner transfer member 42 and the second inner transfer member 44 include an upper one-side alignment pad 111, an upper other-side alignment pad 112, It includes an upper one side curved surface portion 113 and an upper other side curved surface portion 114.

The upper one-side aligning pad 111 axially inserts each of the first inner transfer member 42 and the second inner transfer member 44 . To this end, the upper one-side aligning pad 111 passes through a hole similar to or larger in diameter than the corresponding first inner conveying member 42 and second inner conveying member 44 .

In addition, the upper one-side aligning pad 111 is individually coupled to and fixed to the corresponding first inner transfer member 42 and second inner transfer member 44, respectively. That is, the first inner transfer member 42 has a first edge 43 on the lower side of the circumferential surface, and the second inner transfer member 44 has a second edge 45 on the lower side of the circumferential surface. In addition, the first inner transfer member 42 is inserted from the bottom to the top until the upper one-side aligning pad 111 comes into surface contact with the first edge 43. Similarly, the second inner conveying member 44 is inserted from the bottom to the top until the upper one-side aligning pad 111 comes into surface contact with the second edge 45.

Thereafter, the corresponding upper side aligning pad 111 and the first edge 43 are detachably bound by bolting or the like. Similarly, the corresponding upper side alignment pad 111 and the second edge 45 are detachably bound by bolting or the like.

In addition, the upper other side aligning pad 112 individually axially inserts the corresponding first inner transfer member 42 and the second inner transfer member 44, respectively. To this end, the upper other side aligning pad 112 passes through a hole that is similar to the diameter of the corresponding first inner conveying member 42 and the second inner conveying member 44 or has a predetermined large diameter.

As a result, each of the upper other side alignment pads 112 is stacked face to face with the upper one side alignment pad 111 bound to the first edge 43, and the upper one side bound to the second edge 45. It is laminated so as to face the inning pad 111.

And, the upper other side aligning pad 112 is fixedly bound to the same carrier 50 at the same time by bolting. That is, the upper one-side alignment pad 112, which is laminated face-to-face while facing the upper one-side alignment pad 111 bound to the first edge 43, is fixedly bound to one side of the carrier 50 along the axial direction, , The upper one-side alignment pad 112, which is laminated face-to-face while facing the upper one-side alignment pad 111 bound to the second edge 45, is fixedly bound to the other side of the carrier 50 along the axial direction.

At this time, the first inner conveying member 42 and the second inner conveying member 44 protrude upward after inserting the corresponding upper one side aligning pad 111 and the upper upper side aligning pad 112 into a shaft, respectively. While being inserted into the hole of the bracket 121, it is screwed into the corresponding first ball screw 22 and second ball screw 24.

In addition, the carrier 50 and the other upper aligning pad 112 are coupled by screwing, and the upper one side aligning pad 111 is coupled with a part of the lower alignment unit 120 by bolting or the like.

In addition, the upper one-side curved surface portion 113 is formed to be curved on the surface of the upper one-side aligning pad 111 facing the corresponding upper one-side aligning pad 112 .

In addition, the upper other side curved surface portion 114 is curved on the surface of the upper other side aligning pad 112 so as to be symmetrical to make surface contact with the corresponding upper one side curved surface portion 113, and Correction of the posture of the upper other side alignment pad 112 is naturally allowed (guided).

That is, when the carrier 50 is in an inclined state, the upper one-side curved surface portion of the upper one-side alignment pad 111 fixedly connected to the inner transfer members 42 and 44 at the bottom of one side of the carrier 50 in the axial direction ( 113) and the interaction due to the rolling contact of the upper other side curved surface portion 114 of the upper other side aligning pad 112 fixedly connected to the carrier 50, and the inner conveying member at the lower side of the other side of the carrier 50 in the axial direction Due to rolling contact between the upper one side curved surface portion 113 of the upper one side aligning pad 111 fixedly connected to the upper side curved surface portion 113 and the upper other side curved surface portion 114 of the upper other side aligning pad 112 fixedly connected to the carrier 50 By the interaction, posture correction is made so that the tilting carrier 50 remains level with respect to the floor.

At this time, the carrier 50 may be provided with one or more aligners 100 on one side and the other side along the axial direction. To this end, one or more first ball screws 22 and one or more second ball screws 24 may be provided.

On the other hand, when the carrier 50 is severely shaken or tilted excessively when moving up and down, the other upper aligning pad 112 may not return to the original position after being separated from the correct position from the upper one side aligning pad 111. have.

To prevent this, the upper aligning unit 110 includes a connecting block 115, one joint pin 116, and the other joint pin 117.

The connecting block 115 is provided in contact with the upper one side alignment pad 111 and the upper upper side alignment pad 112 forming a pair. That is, the connecting block 115 is provided with one side in contact with the corresponding upper alignment pad 111 and the other side in contact with the corresponding upper alignment pad 112 in the axial direction. At this time, the upper one-side aligning pad 111 and the upper other-side aligning pad 112 form a groove connected to each other on the circumferential surface to accommodate the connecting block 115, so that the connecting block 115 is set to an assembly position. may be

Of course, the connecting block 115 can be applied in various shapes and materials.

In addition, the one-side joint pin 116 binds the contacting upper one-side alignment pad 111 and the connecting block 115, or the corresponding upper one-side alignment pad to limit the movement of the upper one-side alignment pad 111 ( 111) and the connecting block 115 are connected.

At this time, when connecting the corresponding upper one-side alignment pad 111 and the connecting block 115 to limit the movement of the upper one-side alignment pad 111, the diameter of one-side joint pin 116 is one-side joint pin 116 It may be formed smaller than the inner diameter of the hole of the connecting block 115 or the groove of the upper one-side aligning pad 111 for inserting. Of course, the one-side joint pin 116 can be applied in various shapes and materials.

In addition, the other joint pin 117 connects the corresponding other upper aligning pad 112 and the connecting block 115 so as to limit the movement of the upper other aligning pad 112 .

At this time, when connecting the corresponding upper other side alignment pad 112 and the connecting block 115 to limit the movement of the upper other side alignment pad 112, the diameter of the other joint pin 117 is the other side joint pin 117 It may be formed smaller than the inner diameter of the hole of the connecting block 115 or the groove of the upper other side aligning pad 112 for insertion.

Alternatively, one side joint pin 116 is screwed into and inserted into the connecting block 115, and a part is inserted into the upper one side alignment pad 111. And, the other side joint pin 117 is screwed into the connecting block 115 and inserted, and a part is inserted into the upper other side aligning pad 112. At this time, the diameter of the inner space of the upper other side aligning pad 112 into which the other side joint pin 117 is inserted is larger than the diameter of the other joint pin 117.

Of course, the other joint pin 117 can be applied in various shapes and materials.

In particular, to minimize the degree of freedom of the upper one-side alignment pad 112 with respect to the upper one-side alignment pad 111, the connecting block 115 includes the upper one-side alignment pad 111 and the upper other alignment pad ( 112) is provided with one on the circumferential surface.

Therefore, the carrier 50 has the upper one side curved surface portion 113 of the upper one side aligning pad 111 and the upper other side curved surface of the upper one side alignment pad 112 forming a pair to support one side and the other side along the axial direction, respectively. Through rolling contact of section 114 , aligner 100 guides the leveling of carrier 50 .

Meanwhile, the lower aligning units 120 respectively provided in the first inner transfer member 42 and the second inner transfer member 44 include a bracket 121, a sleeve 122, an aligning plate 123, and a fixing plate. (127) and a binding plate (128).

One side of the bracket 121 is fixed to the first outer transfer member 32, and the other side inserts the first ball screw 22 into a simple shaft. In addition, one side of the bracket 121 is fixed to the second outer transfer member 34, and the other side inserts the second ball screw 24 into a simple shaft. For convenience, each of the brackets 121 connected to the first ball screw 22 and the second ball screw 24 is illustrated as being formed in a 'nineunja (b)' shape.

The bracket 121 is firmly fixed to the corresponding first outer conveying member 32 and the second outer conveying member 34 by bolting or the like. In addition, in order to simply insert the first ball screw 22, the diameter of the hole through the other side of the bracket 121 is formed larger than the diameter of the first ball screw 22, and the second ball screw 24 The diameter of the hole through the other side of the bracket 121 for simple shaft insertion is formed to be larger than the diameter of the second ball screw 24.

This is because the distance between the first guide shaft 12 and the first ball screw 22 forming a pair gradually becomes different, and the distance between the second guide shaft 14 and the second ball screw 24 forming a pair gradually increases. This is so that the bracket 121 can move smoothly along each of the first ball screw 22 and the second ball screw 24 even if it becomes crisp.

Of course, the bracket 121 can be applied in various shapes and materials.

Then, the sleeve 122 axially inserts the corresponding first ball screw 22 or second ball screw 24 . At this time, it is assumed that the diameter of each of the sleeves 122 is larger than that of the corresponding first ball screw 22 and second ball screw 24 .

In addition, the aligning plate 123 is formed by bolting the first edge 43 of the first inner conveying member 42 and the corresponding upper one side aligning pad 111 while the corresponding sleeve 122 is axially inserted. are combined In addition, the aligning plate 123 is formed by bolting the second edge 45 of the second inner conveying member 44 and the corresponding upper one side aligning pad 111 while the corresponding sleeve 122 is axially inserted. are combined

That is, the upper one-side aligning pad 111, the first edge 43, and the aligning plate 123 forming a pair are bound and fixed by bolting or the like. Similarly, the upper one-side aligning pad 111, the second edge 45, and the aligning plate 123 forming a pair are bound and fixed by bolting or the like.

And, the aligning plate 123 is provided to be movable on a plane with respect to the corresponding sleeve 122 . This is to allow the corresponding alignment plate 123 and the sleeve 122 to move individually on a plane.

To this end, the aligning plate 123 forms an accommodation hole 125 that is vertically open at the center of the through hole, and inserts the corresponding sleeve 122 into the shaft. At this time, the diameter of the receiving hole 125 is formed larger than the diameter of the corresponding sleeve 122.

In particular, to prevent the sleeve 122 from being separated from the corresponding alignment plate 123, the sleeve 122 protrudes a flange 124 on the circumferential surface, and the alignment plate 123 has a receiving hole 125 ) It is possible to form a locking jaw 126 on the inner surface of. As the flange 124 is caught on the corresponding locking jaw 126, the natural separation of the flange 124 from the corresponding receiving hole 125 is prevented. In addition, the flange 124 is made of a size that allows free movement in four directions while caught on the locking jaw 126 of the receiving hole 125.

Of course, the accommodating hole 125, the flange 124, and the locking jaw 126 may be formed in various ways.

In addition, the fixing plate 127 is the inner transfer member 42 and 44 corresponding to the aligning plate 123 in order to prevent the shaft-inserted sleeve 122 from being separated from the upper part of the aligning plate 123. It is coupled to each other while being disposed between the edges 43 and 45 .

That is, as seen in FIG. 4, the lower side of the fixing plate 127 is interviewed with the aligning plate 123 while the corresponding first ball screw 22 or the second ball screw 24 is inserted into the shaft, and the upper side The side face is interviewed with the corresponding first edge 43 or second edge 45.

In addition, the stacked alignment plate 123, the fixing plate 127, and the upper one-side alignment pad 111 are bound by bolting.

In addition, the binding plate 128 detachably couples the sleeve 122 protruding to the other side (lower side) of the aligning plate 123 and is bound to the bracket 121, thereby forming a pair of outer conveying members 32 or 34) and the inner transfer members 42 and 44 can be compensated for by the movement of the sleeve 122 relative to the corresponding inner transfer member 42 or 44.

That is, while the binding plate 128 is in contact with the upper surface of the bracket 121, the corresponding first ball screw 22 or second ball screw 24 is axially inserted. At this time, the diameter of the hole of the binding plate 128 is larger than that of the corresponding first ball screw 22 or second ball screw 24 . In addition, the lower circumferential surface of the sleeve 122 is bound to the inner surface of the corresponding hole of the binding plate 128 by screwing or the like.

Accordingly, the stacked and organically bound binding plate 128, the aligning plate 123, the fixing plate 127, and the upper one-side aligning pad 111 are the first inner conveying member 42 or the second inner conveying member 42. Planar movement relative to member 44 is allowed. Thus, the first outer conveying member 32 connected to the bracket 121 can maintain the tension or load on the first guide shaft 12, and the second outer conveying member 34 connected to the bracket 121 can maintain tension or load on the second guide shaft 14.

Therefore, when the distance is gradually narrowed or widened as the pair of first outer conveying member 32 and the first inner conveying member 42 are moved, and the second outer conveying member 34 and the second inner conveying member forming a pair When the distance is gradually narrowed or widened as the transfer member 44 is moved, the flange 124 is naturally moved in the corresponding accommodating hole 125, and the center axis of the first ball screw 22 and the first The aligner ( 100) guides the alignment.

As a result, the bracket 121 connects the first outer conveying member 32 and the first inner conveying member 42 forming a pair, and the second outer conveying member 34 and the second inner conveying member forming a pair ( 44) are connected.

8, the carrier 50 is separated from the first guide shaft 12 and the second guide shaft 14 corresponding to both sides along the axial direction, and the upper one side alignment pad 111 and the upper Leveling is guided by the interaction of the other aligning pad 112 . In addition, the sleeve 122 provided on the bracket 121 allows the movement of the aligning plate 123 fixed to the corresponding first inner transfer member 42 in a plane, and the corresponding second inner transfer member 44 As the planar movement of the aligning plate 123 fixed to ) is allowed, alignment by a gradually different distance between the pair of guide shafts 12 and 14 and the ball screws 22 and 24 is guided. , The connection state (binding force) of the first outer transfer member 32 to the first guide shaft 12 is maintained, and the connection state (binding force) of the second outer transfer member 34 to the second guide shaft 14 ) is maintained.

At this time, even when the first ball screw 22 or the second ball screw 24 is inclined with respect to the corresponding first guide shaft 12 or second guide shaft 14, the carrier 50 can move up and down. Thus, the diameter of the hole of the carrier 50 into which the first ball screw 22 and the second ball screw 24 are axially inserted is set to a set size.

The present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and those skilled in the art can make various modifications and equivalent other embodiments. will understand Therefore, the true technical protection scope of the present invention should be determined by the claims below.

10: lifter 12, 14: first and second guide shafts
22,24: first and second ball screws 32,34: first and second outer transfer members
42,44: first and second inner transfer member 50: carrier
100: aligner 110: upper aligning unit
111: Upper one side alignment pad 112: Upper other side alignment pad
113: Upper one side curved surface portion 114: Upper other side curved surface portion
115: connecting block 116: one side joint pin
117: other side joint pin 120: lower alignment unit
121: bracket 122: sleeve
123: aligning plate 125: receiving hole
126: locking jaw 127: fixing plate
128: binding plate

Claims (7)

At least one pair of guide shafts erected apart from each other by a set interval;
a ball screw that is erected while being disposed in a one-to-one correspondence with the guide shaft and is rotated in a circumferential direction along one direction or the other direction by a power source;
an outer conveying member provided to each of the guide shafts to be reciprocally movable along an axial direction;
an inner conveying member provided to each of the ball screws to be reciprocally movable along an axial direction;
a carrier into which a set number of the ball screws are respectively inserted, connected to the inner transfer member corresponding to the shaft-inserted ball screws, and moved in the same direction by simultaneous rotation of the ball screws; and
When the axial direction of at least one of the corresponding guide shaft and the ball screw is inclined by connecting the corresponding outer conveying member and the inner conveying member, the conveying noise of the outer conveying member with respect to the guide shaft Including an aligner to prevent the transfer noise of the inner transfer member to the ball screw,
The aligner may include an upper aligning unit provided on one side of the inner transfer member with respect to the moving direction and supporting the carrier to correct and guide the eccentric carrier; and
And a lower aligning unit that self-corrects and guides when a distance difference between the corresponding outer and inner conveying members occurs along the axial direction of the ball screw while being connected to the other side of the inner conveying member in the moving direction. A lifter using a screw jack.
According to claim 1,
The inner conveying member is a tubular nut screwed to each of the ball screws,
The aligner is a lifter using a screw jack, characterized in that connected to the outer conveying member corresponding to each provided in the inner conveying member.
delete The method of claim 1, wherein the upper aligning unit,
an upper side aligning pad into which the inner conveying member is axially inserted and fixed to the inner conveying member;
an upper aligning pad disposed opposite to the aligning pad on one side of the upper by axially inserting the inner conveying member and fixed to the carrier;
an upper one-side curved surface portion in which a surface of the upper one-side aligning pad facing the other upper-side aligning pad is formed to be curved; and
Including an upper other curved surface portion in which the surface of the upper other side aligning pad is formed to be curved so as to make surface contact with the upper one side curved surface portion to allow posture correction of the upper one side aligning pad with respect to the upper one side aligning pad A lifter using a featured screw jack.
The method of claim 4, wherein the upper aligning unit,
a connecting block having one side in contact with the upper aligning pad and the other side in contact with the upper aligning pad;
One-side joint pin connecting the upper one-side aligning pad and the connecting block to bind the upper one-side aligning pad and the connecting block or limit the movement of the upper one-side aligning pad; and
A lifter using a screw jack, characterized in that it comprises an other joint pin connecting the upper other aligning pad and the connecting block to limit the movement of the upper other aligning pad.
The method of claim 1, wherein the lower aligning unit,
a bracket having one side fixed to the corresponding outer transfer member and the other side corresponding to the shaft inserting the ball screw;
a sleeve for inserting the ball screw and inserted into the bracket;
an aligning plate for inserting and mounting the sleeve to permit movement in a plane;
a fixing plate coupled to each other while being disposed between the aligning plate and an edge provided on the inner conveying member corresponding to the aligning plate in order to prevent the shaft-inserted sleeve from coming off; and
By detachably coupling the sleeve protruding to the other side of the aligning plate and binding it to the bracket, the distance difference according to the movement of the outer and inner conveying members forming a pair is transferred to the corresponding inner conveying member. A lifter using a screw jack, characterized in that it comprises a coupling plate that compensates for the movement of the sleeve for the movement.
According to claim 6,
The sleeve extends and forms a flange at the edge,
The aligning plate is a lifter using a screw jack, characterized in that it forms an accommodating hole having a larger area than the plane area of the flange, and has a locking jaw to prevent the other side of the flange accommodated in the accommodating hole.

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