KR200483519Y1 - Indexing table for dividing - Google Patents

Indexing table for dividing Download PDF

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Publication number
KR200483519Y1
KR200483519Y1 KR2020150008390U KR20150008390U KR200483519Y1 KR 200483519 Y1 KR200483519 Y1 KR 200483519Y1 KR 2020150008390 U KR2020150008390 U KR 2020150008390U KR 20150008390 U KR20150008390 U KR 20150008390U KR 200483519 Y1 KR200483519 Y1 KR 200483519Y1
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South Korea
Prior art keywords
piston
rotation angle
adjusting means
angle adjusting
pressing piece
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KR2020150008390U
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Korean (ko)
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KR20170000788U (en
Inventor
이원엽
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주식회사 리드이엔지
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/08—Indexing equipment having means for clamping the relatively movable parts together in the indexed position
    • B23Q16/10—Rotary indexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • B23Q16/06—Rotary indexing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/56—Preventing backlash

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Units (AREA)

Abstract

The indexing table includes a table body, a servo motor installed at an upper side of the table body, a table driven by the servo motor installed at the upper center of the table body, A plurality of connecting protrusions formed on a circumferential surface of the partition plate; a plurality of stepped portions formed on the other side of the upper portion of the table body so as to be rotatably supported on the hinge axis so as to be symmetrically bent about the hinge axis, A first coupling protrusion which is engaged with the connection protrusion of the partition plate at a first gap is formed at one end of the inner side surface, And the other end of which is provided with a second engagement protrusion that is engaged with the connection protrusion of the partition plate at a second gap, A first coupling means for pressing one end of the outer surface of the rotation angle adjusting means through a first piston which is installed at one end of the first cylinder and drawn out from the fixed first cylinder to engage the first coupling projection with the connection projection, And the other end of the outer surface of the rotation angle adjusting means is pressed through a second piston which is installed at the other end of the rotation angle adjusting means and drawn out from the fixed second cylinder, And a second pressing piece provided on an end of the second piston, wherein the rotational angle adjusting means comprises a first pressing piece provided on an end of the first piston, and a second pressing piece provided on an end of the second piston, A step portion that is vertically bent upward from both end portions toward the hinge axis and horizontally extended by a predetermined width, Wherein the first contact piece and the second contact piece are disposed at positions facing each other by a predetermined distance from any one of the first pressing piece and the second pressing piece, And the first pressing piece and the second pressing piece are held in contact with each other when one of the first pressing piece and the connection protrusion is engaged with each other.
Accordingly, it is possible to stably support the rotation pressure of the partition plate by one of the two coupling protrusions formed on both sides of one partition plate fastening structure, thereby stably fixing the rotation position of the partition plate, It is possible to easily adjust the rotational position of the partition plate and the partitioning plate fixing structure, thereby minimizing damage to the connection protrusion of the partition plate and the partition plate fixing structure, thereby improving the life of the device.

Description

{INDEXING TABLE FOR DIVIDING}

The present invention relates to an indexing table, and more particularly, to a partitioning indexing table capable of rotating and fixing a partitioning plate at various angles by using a single partitioning plate fixing structure.

In general, the indexing table is a tilting device that is operated to rotate the jig base at a specific angle required by the workpiece during machining of the workpiece using the machine tool.

That is, in a generalized computerized numerical control (CNC) machine tool, when machining more than two surfaces, it is driven to process the other surface by changing the position of the fixed portion of the workpiece after machining on one surface Indexing table.

As a representative prior art relating to the above-mentioned indexing table, the Korean Registered Patent Publication No. 10-1298545 (name: a partition plate fixing structure for improving partitionability) (hereinafter referred to as prior art) is exemplified.

The prior art includes a main rocking means including a partition plate having a main gear rotated in connection with a main shaft of a machine tool and a main moving gear provided at one side of the partition plate and meshing with the main gear, Wherein the auxiliary gear is disposed at a position where the auxiliary gear is not engaged with the main gear when the main gear and the main gear are engaged with each other, .

That is, according to the prior art, only one of the two divided plate fixing structures (moving gears) having different partitioning capacities can be engaged with the partition plate, and the rotational position of the partition plate can be fixed at various angles.

However, in the case of the prior art, discrete plate fixing structures (moving gears), which are individually controlled, are disposed at positions opposite to each other with respect to the partition plate, so that when the rotational position of the partition plate is finely adjusted, And if one of the two divided plate anchoring structures is moved forward, the other one should be individually controlled to move backward. Therefore, if a problem arises in one of the control operations, the connection projection of the partition plate There is a problem in that irregularities may occur in the teeth of the partition plate due to the partition plate fixing structure in a state where it can not be interlocked, thereby causing a backlash phenomenon, resulting in a decrease in precision.

KR 20-0450502 Y1

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and method for efficiently dividing a divided plate into a plurality of divided plates, which can effectively stabilize the rotational position of the divided plate, And an indexing table.

According to one aspect of the present invention, there is provided an indexing table for partitioning, which comprises a table body, a servo motor installed at an upper side of the table body, And a connecting plate which is driven by the connecting plate and is divided into a plurality of connecting protrusions, the connecting plate being rotatably supported on the hinge shaft at the other side of the upper portion of the table body so as to be mutually symmetrical about the hinge axis, And an inner surface facing the partition plate is formed to have a curvature corresponding to an outer circumferential surface of the partition plate, and at one end of the inner surface, a first protrusion And the other end of the inner side surface is formed with a rotation angle &thetas;, on which a second engagement protrusion is formed at a second gap from the connection projection of the division plate, And a second piston projecting from the inside of the first cylinder, which is installed on one side of the one end of the rotation angle adjusting means, and presses one end of the outer side of the rotation angle adjusting means, And the other end of the outer surface of the rotation angle adjusting means is pressed through the second piston drawn out from the inside of the second cylinder which is installed and fixed to the other end of the rotation angle adjusting means, And a second pressing piece provided on an end of the second piston, wherein the second pressing piece is provided on an end of the first piston and the second pressing piece is provided on an end of the second piston, The angle adjusting means includes a step portion vertically bent upward from both side ends of the outer side surface toward the hinge axis and horizontally extending by a predetermined width, And two contact pieces provided at positions facing each other at a predetermined distance from any one of the first pressing piece and the second pressing piece at an upper portion of the step portion, And the first pressing piece and the second pressing piece are held in contact with each other when any one of the second coupling projections and the connection projection are engaged with each other.

According to the present invention, it is possible to stably support the rotational position of the dividing plate by effectively supporting the rotational pressure of the dividing plate by one of the two engaging projections formed on both sides of the one dividing plate fixing structure, It is possible to easily adjust the rotational position of the partition plate and to minimize the damage of the connection protrusion of the partition plate and the partition plate fixing structure to improve the life of the device.

1 is a front view showing a partitioning indexing table according to an embodiment of the present invention,
Fig. 2 is an enlarged front view showing the partition plate, the rotation angle adjusting means, and the plurality of coupling means in Fig. 1,
3 is a conceptual diagram for explaining the rotation angle adjusting means of FIG.

The specific matters including the problems to be solved, the solutions to the problems, and the effects of the inventions as described above are included in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the specification.

FIG. 1 is a front view showing a partitioning indexing table according to an embodiment of the present invention, FIG. 2 is an enlarged front view showing the partitioning plate, the rotation angle adjusting means and the plurality of coupling means in FIG. 1, 1 is a conceptual diagram for explaining the rotation angle adjusting means.

Hereinafter, the indexing table for partitioning according to an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, the indexing table for partitioning according to an embodiment of the present invention includes a table body 10, a servo motor 20 installed on one side of the table body, A rotation angle adjusting means 200 rotatably mounted on the hinge shaft H at the other side of the upper portion of the table body 10, And a first coupling means (200) and a second coupling means (400) provided at one side of both ends of the rotation angle adjusting means (200).

First, the table body 10 is formed to have a width enough to seat a workpiece to be processed, and a pallet (not shown) for fixing the workpiece may be provided on the table body 10.

Next, the servo motor 20 is installed on one side of the table body 10 to control the workpiece placed on the table body 10 to rotate at a predetermined rotation angle.

Here, the servomotor 20 may be controlled within a range of 0 to 180 degrees by a PWM signal transmitted by an externally connected computer.

Next, the partition plate 100 is installed on the center of the upper part of the table body 10, and is driven by the servo motor 20, and a connection protrusion 110 divided equally into a predetermined angle is formed on the circumferential surface.

Here, the partition plate 100 is connected to the main shaft of the table body 10 and rotates at a predetermined angle by the servo motor 20, and the rotation angle of the workpiece, which is seated on the table body 10, May be the same as the rotation angle of the partition plate (100).

At this time, the partition plate 100 is connected to the servo motor 20 using a gear or a belt device which is a shaft coupling device, and a speed reducer is further connected to the servo motor 20 to adjust the speed ratio of the servo motor 20 with the rotation axis It is possible.

For example, as shown in FIG. 1, the partition plate 100 is installed to engage with a timing gear connected to the rotation shaft of the servo motor 20 through a timing belt, and can be driven by the servo motor 20 have.

The rotation angle adjusting means 200 is rotatably supported on the hinge axis H at the other side of the upper portion of the table body 10 and the outer side surfaces of the rotary body 20 are symmetrically symmetrical about the hinge axis H, And an inner side surface facing the partition plate 100 is formed to have a curvature corresponding to an outer circumferential surface of the partition plate 100. One end of the inner side surface of the partition plate 100 A first coupling protrusion 210 which is engaged with the coupling protrusion 110 at a first gap and a second coupling protrusion 210 which is coupled to the coupling protrusion 110 of the dividing plate 100 at a second gap, A coupling protrusion 220 is formed.

Here, the rotation angle adjusting means 200 is formed to extend outward along the circumferential surface of the partitioning plate 100, and is disposed at the other side of the upper portion of the table body 10 with respect to the hinge axis H as a seesaw motion type As shown in Fig.

That is, when one end of the rotation angle adjusting means 200 moves forward, the other end of the rotation angle adjusting means 200, which is fixed by the hinge axis H, moves backward, When a pressing force is applied to any one of the first and second coupling protrusions 210 and 220 provided at both ends of the means 200, the reaction force against the pressing force is immediately applied to the remaining one, It is possible to easily control the two engagement protrusions at the same time.

The rotation angle adjusting means 200 includes a first angle formed by an inner circumferential surface of one end of the rotation angle adjusting means 200 having the first coupling protrusion 210 formed thereon with respect to the hinge axis H, The second angle formed by the other end inner circumferential surface of the rotation angle adjusting means 200 in which the two engaging projections 220 are formed may be different from each other.

The first and second coupling protrusions 210 and 220 may have a minimum division capability of 1 ° and may have any one of the first and second coupling protrusions 210 and 220, Is arranged at an angle of "a" (integer) with respect to the hinge axis H to fix the division plate 100 at an angle of "x (arbitrary integer) ", and the other The engagement protrusions are arranged at an angle of "a (integer) + 0.5 °", and can be fixed at an angle of "x (arbitrary integer) + 0.5 °".

For example, referring to FIG. 3, an angle formed between the opposite ends of the first coupling protrusion 210 and the second coupling protrusion 210, with respect to a predetermined center point located on a hypothetical axis perpendicular to the hinge axis H, The angle between the inner circumferential surface of one end of the rotation angle adjusting means 200 having the first coupling protrusion 210 and the hinge axis H is 26.5 And the angle between the inner circumferential surface of the other end of the rotation angle adjusting means 200 formed with the second engagement protrusion 220 and the hinge axis H is 26 degrees and 49 degrees.

That is, the first coupling protrusions 210 are formed at a position where the rotation angle of the partition plate 100 is 1 deg., 2 deg. And the second coupling protrusions 220 can be engaged with the coupling protrusions 110 of the partition plate 100 when the partition plate 100 has a rotation angle of 1.5 ° , 2.5˚, ... And N + 0.5 degrees, it can be engaged with the connection protrusions 110 of the partition plate 100, so that it is possible to divide various angles by one rotation angle adjustment means 200. [

The minimum splitting capability of the first coupling protrusion 210 and the second coupling protrusion 220 is set such that the distance from the tooth surface of one connection protrusion to the next connection protrusion on the pitch circle of the division plate 100 And can be calculated by the following equation (1) as an angle corresponding to the circumferential pitch corresponding to the circular arc length up to the arc length.

Figure 112015125349105-utm00001

2, the rotation angle adjusting means 200 includes a step 230 which is vertically bent upward from both ends of the outer side toward the hinge axis H and extends horizontally by a predetermined width, And two protrusions protruding outward by a predetermined height and provided at positions facing the first pushing piece 322 or the second pushing piece 422 at a predetermined distance from the upper portion of the step portion 230 And may include a contact piece 240.

The two contact pieces 240 are formed such that one of the first and second engagement protrusions 210 and 220 is engaged with the connection protrusion 110 and the other is engaged with the connection protrusion 110 The first pressing piece 322 and the second pressing piece 422 are kept in contact with each other so that the movement of the rotation angle adjusting device 200 The range can be minimized so that stable angle division is possible even with a small driving force.

The first coupling means 300 is for coupling the first coupling protrusions 210 to the connection protrusions 110 of the partition plate 100 and is provided at one end of the rotation angle adjustment means 200 A first piston 310 installed in the first cylinder 310 and a second piston 320 installed in the first cylinder 310. The first cylinder 310 and the second cylinder 310 are fixedly installed, And a first elastic member (330). The first cylinder 310 may be of a hydraulic type or a pneumatic type so long as it can move the first piston 320 in the forward and backward directions.

Specifically, the first coupling means 300 presses one end of the rotation angle adjusting means 200 through the first piston 320 drawn out from the fixed first cylinder 310, The protrusions 210 can be engaged with the connection protrusions 110. At this time, the drawn-out first piston 320 receives an elastic restoring force to be drawn into the first cylinder 310 by the first elastic member 330.

The first piston 320 is provided with a first pressing part 322 which is in direct contact with one end of the rotation angle adjusting means 200 during the drawing operation of the first piston 320 to apply a pressing force thereto .

At this time, the first protruding portion 322 of the rotation angle regulating means 200 may include a contact protruding portion which is coaxial with the horizontal axis of the first pressing portion 322. [

The second coupling means 400 is for coupling the second coupling protrusions 210 to the connection protrusions 110 of the partition plate 100 and is provided at one end of the rotation angle adjustment means 200 A second piston 420 installed inside the second cylinder 410 and a second piston 420 installed between the second cylinder 410 and the second piston 420. The second cylinder 410 is fixedly installed, And a second elastic member (430). The second cylinder 410 may be of a hydraulic type or a pneumatic type so long as it can move the second piston 420 in the forward and backward directions.

Specifically, the second coupling means 400 presses the other end of the rotation angle adjusting means 200 through the second piston 420 drawn out from the fixed second cylinder 410, The protrusion 220 can be engaged with the connection protrusion 110. At this time, the drawn-out second piston 420 receives an elastic restoring force to be drawn into the second cylinder 410 by the second elastic member 430.

A second pressing piece 422 is provided at an end of the second piston 420 to apply a pressing force to the end of the second piston 420 in direct contact with one end of the rotation angle adjusting means 200 during the drawing operation of the second piston 420 .

The second pressing piece 422 may include a contact protruding portion that is coaxial with the horizontal axis of the second pressing piece 422 at a position where the second pressing piece 422 contacts the other end of the rotation angle adjusting means 200.

Meanwhile, the indexing table for partitioning according to an embodiment of the present invention is installed on both end protruding portions of the rotation angle adjusting means 200, and the first piston 320 and the second piston 420 penetrate therethrough And may further include a first guider 500 and a second guider 600 for performing linear motion.

Here, the first guider 500 is provided at one end protrusion of the rotation angle regulating means 200, and a guide hole through which the first piston 320 passes is formed.

At this time, the first pressing piece 322 is formed to be larger than the diameter of the guide hole and is seated on the upper surface of the first guider 500 when the first pressing piece 322 is drawn inward of the first cylinder 310.

Here, the second guider 600 is provided at the other end protruding portion of the rotation angle regulating means 200 to form a guide hole through which the second piston 420 penetrates.

At this time, the second pressing piece 422 is formed to be larger than the diameter of the guide hole, and is seated on the upper surface of the second guider 600 when the second pressing piece 422 is drawn inward of the second cylinder 410.

Therefore, according to the indexing table for partitioning according to an embodiment of the present invention, the rotational pressure of the partitioning plate can be efficiently supported by any one of the two coupling projections formed on both sides of one partitioning plate fixing structure, The rotation position of the partition plate can be easily adjusted at various angles and the damage of the connection protrusion of the partition plate and the partition plate fixing structure can be minimized to improve the life of the device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

10: Table body 20: Servo motor
100: partition plate 110: connection projection
200: rotation angle adjusting means 210: first fitting projection
220: second engagement protrusion 230: stepped portion
240: contact piece 300: first engagement means
310: first cylinder 320: first piston
322: first pressing piece 330: first elastic member
400: second engagement means 410: second cylinder
420: second piston 422: second pressure piece
430: second elastic member 500: first guider
600: second guider

Claims (4)

Table body;
A servo motor installed at an upper side of the table body;
A partition plate installed at the center of the upper portion of the table body and driven by the servo motor and having connection protrusions formed on the circumferential surface thereof,
The outer surface of the table body is rotatably supported on the hinge shaft at the other side of the upper portion of the table body, and the outer surface of the table body is formed in the form of a multi-stepped bend symmetrically with respect to the hinge axis, A first coupling protrusion which is engaged with the connection protrusion of the partition plate at a first gap is formed at one end of the inner side surface and a second coupling protrusion is formed at the other end of the inner side surface at a second gap A rotation angle adjusting means for forming a second coupling protrusion to be engaged with the rotation angle adjusting means;
And the first engagement protrusion is engaged with the connection protrusion by pressing one end of the outer surface of the rotation angle adjusting means through the first piston which is installed at one end of the rotation angle adjusting means and drawn out from the fixed first cylinder, A first coupling means;
The other end of the outer side surface of the rotation angle adjusting means is pressed through the second piston which is installed at the other end of the rotation angle adjusting means and drawn out from the fixed second cylinder to engage the second engagement projection with the connection projection A second coupling means;
A first pressing piece installed at an end of the first piston; And
And a second pressing piece installed at an end of the second piston,
Wherein the rotation angle adjusting means comprises a step portion that is vertically bent upward from both side ends of the outer side surface toward the hinge axis and extends horizontally by a predetermined width and a step portion that protrudes outward by a predetermined height, And the second contact piece is provided at a position opposite to the first pressing piece at a predetermined distance from the one of the first pressing piece and the second pressing piece, And when the first pressing piece and the second pressing piece are engaged with each other, the first pressing piece and the second pressing piece are held in contact with each other. The method according to claim 1,
When either one of the ends of the outer surface of the rotation angle adjusting means is pressed by either the first piston or the second piston to engage with the connection protrusion, the other one of both ends of the outer surface is seamed around the hinge axis And is released from a state of engagement with the connection projection. The method according to claim 1,
Wherein the rotation angle adjusting means comprises:
The first angle formed by the inner peripheral surface of the one end of the rotation angle adjusting means formed with the first coupling protrusion and the second angle formed by the inner peripheral surface of the other end of the rotation angle adjusting means formed with the second coupling protrusion differ from each other with respect to the hinge axis Wherein the indexing table is divided into two sections. The method according to claim 1,
A first elastic member mounted between the first cylinder and the first piston to allow the first piston to be drawn in;
A second elastic member mounted between the second cylinder and the second piston to allow the second piston to be drawn in;
A first guider installed at one end protruding portion of the outer surface of the rotation angle regulating means and guiding a linear motion of the first piston through a guide hole through which the first piston penetrates; And
Further comprising a second guider installed at a protruding portion of the outer surface of the outer side surface of the rotational angle adjusting means and guiding a linear motion of the second piston with a guide hole through which the second piston penetrates, table.
KR2020150008390U 2015-08-20 2015-12-21 Indexing table for dividing KR200483519Y1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101485100B1 (en) 2013-10-15 2015-01-22 케이시시정공 주식회사 Bidirectional index

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902889A (en) * 1956-06-18 1959-09-08 Gisholt Machine Co Hydraulic turret index
US3406595A (en) * 1967-04-13 1968-10-22 Giddings & Lewis Index unit
JPS5064662A (en) * 1973-10-11 1975-05-31
KR100458285B1 (en) 2002-12-10 2004-11-26 한국과학기술연구원 Method for manufacturing V groove structure using photoresist

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101485100B1 (en) 2013-10-15 2015-01-22 케이시시정공 주식회사 Bidirectional index

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