KR101725052B1 - The folding table system of the chair - Google Patents

Abstract

The present invention relates to a foldable table device for a chair. The purpose of the present invention is to provide the foldable table device for a chair, capable of obtaining structural durability and excellent appearance by being connected to and installed on one side of the chair without the exposure of a joint part and improving quality by folding a table without movement. A rotary holder is connected to and installed in a rotary pin inside a folding holder by a connection socket. A rotary bush and the rotary plate positioned inside the table are fixated and installed in the rotary holder to be integrated by a coupling bolt. A rotary hole comes into contact with an upper bush of the rotary bush, thus the table is rotated around the rotary bush. The rotary holder is rotated and moved along the folding holder installed at a predetermined angle, thus the table is folded to be inclined.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding table apparatus for a chair,

The present invention relates to a folding table apparatus for a chair, in which a coupling force between a rotatable holder fixed to a table and a folding holder fixed to a support pipe is kept constant, and a table is rotated along an upper bush formed in a ring- To a folding table apparatus for a chair which improves the emotional quality of the folding operation of the table.

In general, only a chair in which a listener can sit is provided in a space where seminars, lectures, lectures, etc. are performed, and there are inconvenient inconveniences such as memo or writing. So that the folding table can be folded.

Conventionally, a table for a chair is rotatably folded by a rotation folding member so as to be folded on one side of a chair frame.

However, in the conventional table for a chair as described above, the rotating folded back part is made of a bolt / nut type and the bolt fastening part is provided with a central axis function of rotation and folding, There is a problem that loosening occurs between the parts due to occurrence of loosening phenomenon and loosening occurs between the parts during the folding operation due to occurrence of clearance between the parts and noise is generated due to frictional contact between the parts.

In addition, the chair provided with the conventional simplified table has convenience of use. However, when the simplified table is folded, the table is positioned in the forward / backward direction so as to be close to the side of the chair. The number of chairs can not be superposed due to the interference between the folded tables. As a result, the chair can not be stored in a narrow space and occupies a lot of space for carrying the logistics.

Patent Registration No. 10-1188543 (September 27, 2012) Public Utility Model Publication No. 20-2011-0001595 (Feb. 17, 2011) Patent Registration No. 10-1691749 (December 26, 2016) Patent Registration No. 10-1479865 (December 30, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a folding table apparatus for a chair which is connected to one side of a chair without exposing a connection site to provide structural rigidity and aesthetic appearance and folds the table without shaking to improve emotional quality .

The present invention is characterized in that a rotatable holder is connected to a rotary pin in a folding holder by a connecting socket, and a rotatable bush and a rotatable plate positioned inside the table are integrally fixed to the rotatable holder by an engaging bolt, The table is rotated about the rotatable bush and the rotatable holder is rotated along the folding holder installed to have a predetermined inclination angle so that the table is folded and operated in an inclined manner.

In the present invention, the rotary holder and the rotary pin in the folding holder are connected by a connection socket and a limit bush inserted into the center hole of the rotatable holder and the folding hole of the folding bush, and the bottom plate of the table is located between the table top plate and the bottom plate So that the connection portions of the table, the rotatetolder and the folding holder are not exposed to the outside during the assembling and installation, thereby providing a good appearance through the rotatable plate.

In the present invention, not only the rotation pin in the rotatable holder and the folding holder is directly fastened by the connection socket, but the coupling force of the connection socket is controlled and fastened by the limit bush, so that the rotation holder rotates with a constant rotation force.

The lower end of the rotatable bush is inserted into the center hole of the rotatable holder, thereby preventing the loosening of the connecting socket for fastening the rotatable holder and the rotary pin in the folding holder.

Since the rotatable bush having the annularly formed upper end bush having a predetermined outer diameter is brought into contact with the upper bush of the table, the rotatable hole of the table is rotated in contact with the outer surface of the upper bush during rotation of the table, And the contact noise due to the flow due to the clearance between the table and the upper end portion is not generated, so that the emotional quality is improved.

The present invention is capable of pushing and chucking a chair without interfering with a folded table because the upper surface of the table has a predetermined inclination angle with respect to the rear of the chair when the table is folded, It is possible to keep the chair.

The present invention has many advantages such as providing a good merchandise due to ease of use and improvement of aesthetics because the folding folds on one side of the chair with a beautiful appearance.

1 is an illustration showing a configuration according to the present invention;
2 is an exemplary view showing an installation configuration according to the present invention.
3 is an exemplary view showing a configuration of a folding holder according to the present invention.
4 is a view showing another example of the configuration of the folding holder according to the present invention.
5 is an exemplary view showing a coupling relationship between the folding holder and the table according to the present invention.
6 is an exemplary view showing the configuration of a rotation pin according to the present invention
Fig. 7 is an exemplary view showing a configuration of a folding bush according to the present invention
8 is an exemplary view showing a configuration of a rotate holder according to the present invention
FIG. 9 is an exemplary view showing a configuration of a rotatable bush according to the present invention
10 is an exemplary view showing a combined relationship of the assembled state of the present invention
11 is an example showing the operating state of the present invention
Fig. 12 is an exemplary view showing the folding state of the present invention
FIG. 13 is a view showing an example of a storage state of the present invention

FIG. 1 is an exemplary view showing a configuration according to the present invention, FIG. 2 is an exemplary view showing an installation configuration according to the present invention, FIG. 3 is an exemplary view showing the configuration of a folding holder according to the present invention, FIG. 5 is an exemplary view showing a coupling relationship between a folding holder and a table according to the present invention, FIG. 6 is an exemplary view showing a configuration of a rotation pin according to the present invention FIG. 7 is an exemplary view showing a configuration of a folding bush according to the present invention, FIG. 8 is an exemplary view showing a configuration of a rotatable holder according to the present invention, FIG. 9 is a view showing an example of a configuration of a rotary bush according to the present invention Fig. 11 is an exemplary view showing the operating state of the present invention, Fig. 12 is an example showing the folding state of the present invention, Fig. 13 Is a view showing an example of a storage state of the present invention That,

The present invention is characterized in that a rotatable holder 40 is connected to a rotary pin 20 in a folding holder 10 by a connection socket 60 and a rotary plate 90 located inside a table is coupled The table 80 is integrally fixed to the rotatable holder 40 by the bolts 95 and the table 80 is rotated around the rotatable bush while the rotary shaft of the table is in contact with the upper bush of the rotatable bush 70, The rotatable holder 40 is rotated along the folding holder 10 provided so as to fold the table 80 obliquely.

A folding holder 10 to which a fixing bar 11 is inserted and bolted in an upper end of a hollow support frame 120 having a lower side connected to a chair frame 110; A rotatable holder (40) that is in contact with the folding bush and folds along a folding surface, a rotatable holder (30) folded on the folding bush, a folding bush (30) A limit bushing 50 penetrating through the bush and the folding holder and having a lower end inserted into the fastening hole of the rotary pin and inserted into the center hole of the rotor holder to penetrate the limit bushing and fastened to the fastening hole of the lower pin A rotatable bushing 70 coupled to the upper side of the rotatable holder so that the lower end of the lower end of the rotatable holder is inserted into the center hole of the rotatable holder in which the connection socket is inserted, A table 80 having a rotation hole into which a through hole is inserted and a rotary movement hole, and a fastening through hole and a guide through hole of a rotatable bush are inserted into the table, and a rotary bolt and a rotation holder And a rotation plate 90 integrally connected to the rotation plate 90.

1 and 2, the support frame 120 is fixed to the leg frame 111 or the seat frame 112 or the armrest frame of the chair by welding, bolt nuts, And is formed in a pipe shape having a hollow.

As shown in FIGS. 3 and 4, the folding holder 10 includes a fixing bar 11 inserted into an upper end of the support frame 120 to be bolted thereto, and a cylindrical body 11 integrally formed with the fixing bar 11, And a support frame (not shown) having a tilt angle (?) Of about 8 to 12, preferably about 10 relative to the front of the chair (F) 120.

The fixing bar 11 has a plurality of bolt holes 11a formed at one side thereof and inserted into the supporting frame 120 having a hollow structure and inserted into the bolt hole 11a through the supporting frame 120 And is fixed to the support frame 120 integrally.

The holder body 12 has a pin insertion hole 13 opened to one side and into which the rotation pin 20 is inserted and a bush seating groove 14 formed at a predetermined depth along the outer surface so that the folding bush 30 is inserted. And a bushing coupling hole 15 through which the bushing receiving groove 14 and the pin insertion hole 13 are communicated with each other to allow the connection socket 60 to be inserted therethrough.

The pin insertion hole 13 is inserted such that the rotation pin 20 is rotatable and the pin head hole 13a and the pin body hole 13b are formed to have a step. At this time, the pin body hole 13b is formed so as to communicate with the bushing hole 15.

The bush seating groove 14 is formed along the periphery of the holder body 12 and has a bush fixing groove 16 formed at one side thereof with one side of the folding bush 30 inserted and coupled therewith.

The bushing coupling hole 15 is formed to guide the folding of the table 80 while allowing the folding bush 30 to be stably coupled to the bushing receiving groove 14 together with the bushing fixing groove 16, And is formed so as to communicate with the pin insertion hole (13) in the bush seating groove (14).

The rotation pin 20 is inserted into the pin insertion hole 13 of the folding holder and connected to the connection socket 60 and the limit bushing 50 so as to fold the table 80, 20 includes a pin body 22 having a coupling hole 23 and a pin head 21 formed in a layer with the pin body 21, 23 includes a bush support hole 24 in which the limit bush is supported and a socket fastening hole 25 formed in the bush support hole 24 and forming a stepped step 26 to screw the connection socket 60 .

The rotation pin 20 is inserted into the pin hole 13a of the pin insertion hole so that the pin head 21 is inserted into the pin hole 13a of the pin insertion hole, Is inserted into the pin insertion hole (13) of the folding holder so as to be communicated with the bushing hole (15).

The folding bush 30 is designed to smoothly perform the folding operation of the table 80. As shown in FIG. 1, the folding bush 30 includes a bush seating of the folding holder 10 so as to be positioned between the rotate holder 40 and the folding holder 10 And inserted into the groove 14.

7, the folding bush 30 includes a folding part 33 on which one side of the rotate holder 40 is slidably rotated, and a folding part 33 formed on one end of the folding part 33, A first support portion 31 at one side of the rotatable holder 40 and a second support portion 31 at the other end of the folding portion 33 to support the other side of the rotatable holder 40 when the table is folded. 2 supporting portion 32 and a folding hole 34 formed to penetrate the folding portion 33. The folding hole 34 is formed to protrude in the direction of the lower surface 33a of the folding portion along the periphery of the folding hole 34, And a coupling protrusion 36 protruded from one side of the lower surface 33a of the folding unit and inserted and coupled into the bush fixing groove 16 of the folding holder.

The folding hole 34 is inserted into the limit bushing 50 and the connection socket 60 and guides the limit bushing 50 and the connection socket 60 during the folding operation of the table. And has a predetermined length (circular arc) so as to be folded in a vertical state in a state of being folded.

The folding guide 35 protrudes around the folding hole 34 and is inserted into the bushing hole 15 of the folding holder 10 formed in a long hole. And guides the limit bushing 50 inserted into the folding hole 34 so as to smoothly rotate without shaking during the folding operation of the table 80.

That is, when the table is maintained in a horizontal state, the limit bush 50 is abutted and supported on the upper end 35a of the folding guide. When the table is folded to maintain the vertical state, The bush 50 is brought into contact with and supported.

The folding holder 10 and the folding bush 30 constructed as described above may be separately formed and assembled or integrated in the manufacturing process.

8, the rotatable holder 40 includes a lower holder 41 which is rotatably moved along the folding portion 33 of the folding bushing, and a lower holder 41 which is integrally formed with the lower holder 41 and has a plurality of fastening holes And a center hole 43 is formed to penetrate the upper holder 42 and the lower holder 41. [

The lower holder 41 includes a first support protrusion 45 which is in contact with and supported by one side of the folding bush 30 during the folding operation of the table and a second support protrusion 45 supported by the other side of the folding bush 30 during the folding operation of the table. 2 supporting jaw 46 and a sliding curved surface portion 47 connecting the first supporting jaw 45 and the second supporting jaw 46 and sliding along the folding portion 33 of the folding bush.

That is, when folding the table, the first support step 45 is held in contact with the first support part 31 of the folding bush to maintain the table 80 in a horizontal state, When the table is folded, the table 80 is held in contact with the second support portion 32 of the folding bush so that the table 80 is maintained in a vertical state, and the slide curved surface portion 47, when folding the table, (33).

At this time, the first support step 45 is formed to be positioned lower than the second support step 46 with respect to the upper holder 42, and the slide supporting the first and second support protrusions 45, The curved surface portion 47 is preferably formed to have a downward curved surface.

The upper holder 42 includes a plurality of fastening holes 44 for fastening the rotatable bush 70 and the rotation plate 90 to each other and includes a guide fastening hole 48 at one side thereof, And a hole (49).

The center hole 43 has an upper center hole 43a into which a connecting socket 60 and a rotatable bush 70 are inserted and a stepped portion 43c and an upper center hole 43a. And a lower center hole 43b into which the connecting socket 60 and the limit bushing 50 are inserted.

The upper end of the limit bushing 50 is inserted into the center hole 43 of the rotatable holder 40 so that the upper end 51 of the limit bushing 50 is held in contact with the socket head 61 of the connection socket. 24 so that the lower end 52 is in contact with the step jaw 26 to constantly adjust the tightening force between the rotatable holder 40 and the rotary pin 20 by the connecting socket 60, And is stably moved along the folding hole 34 and the folding guide 35 of the folding bushing during the folding operation of the table 80 to prevent the table 80 from swinging.

That is, as shown in FIGS. 1 and 10, the limit bushing 50 is installed so as to pass through the lower center hole 43b of the rotatable holder, the folding hole 34 of the folding bushing and the folding guide 35, The upper end 51 is held in contact with the socket head 61 of the connection socket 60 and the lower end 52 is provided with a predetermined length L so as to be contacted with the stepped jaw 26 provided on the rotation pin . At this time, the limit bushes 50 are closely installed within the assembly tolerance range.

1 and 10, the connection socket 60 includes a threaded socket body 62, a socket body 62, and a socket body 62. The socket body 60 includes a threaded socket body 62, Wherein the socket head 61 is located within the upper center hole 43a of the rotatable holder and the socket body 62 penetrates through the limit bushing 50, (25).

As shown in FIGS. 1 and 9 to 10, the rotatable bushing 70 includes a plate 73 that is in contact with the upper holder 42 of the rotatable holder, and a plate 73 that is formed to protrude from the lower surface 73a of the plate A lower end portion 71 inserted into the center hole 43 of the rotatable holder and an upper end portion 72 protruding from the upper surface 73b of the plate and inserted into the rotatable hole 84 of the table, A guide through hole 74 protruding from one side of the upper surface 73b and inserted into the rotary movement hole 85 of the table and a plurality of through holes 74 protruding from the upper surface 73b of the plate, And a protrusion 76 protruding from one side of the lower surface 73a of the plate.

The lower end portion 71 is inserted into the center hole 43 of the rotatable holder, that is, into the upper central hole 43a to prevent the connection socket 60 from being loosened.

The upper end portion 72 is protruded in a ring shape having a predetermined radius and the outer surface 72a is provided so as to be in contact with the rotation hole 84 of the table, Function and a function of guiding the rotation of the table 80 at the same time.

At this time, it is preferable that the upper end portion 72 is formed to have a predetermined radius within a range that the guide hole 74 can be provided in the plate 73.

The through hole 75 and the guide through hole 74 are formed to have a predetermined height on the upper surface 73b of the plate so that the body 97 of the coupling bolt 95 is penetrated and the head 96 is contactably supported, And the guide through hole 74 is protruded so as to be inserted into the rotational movement hole 85 of the table so that the through hole 75 is inserted into the rotatable hole 84 of the table.

The protrusion 76 is inserted into the protrusion insertion hole 49 of the rotatable holder to improve the assemblability of the rotatable bushing 70 and prevent the rotation of the rotatable bushing 70.

1, the table 80 is configured such that the table lower plate 81 and the table upper plate 82 are coupled by the table bolts 83. The table lower plate 81 and the table top plate 82, The rotation plate 90 is positioned.

The lower table plate 81 is formed with a circular rotation hole 84 at one corner thereof and is formed with a rotary movement hole 84 spaced apart from the rotation hole 84 along the periphery of the rotation hole 84, (Not shown). That is, the rotation hole 84 and the rotation movement hole 85 have the same center point, and the rotation movement hole 85 is formed in a half-circular shape.

The upper end portion 72 of the rotatable bush is inserted into the rotation hole 84 so as to have a predetermined assembly tolerance and the guide hole 74 is inserted into the rotation movement hole 85, . The assembly tolerance means a typical assembly tolerance to the extent that clearance is not generated.

The rotatable plate 90 is engaged with the rotatable bushing 70 and the rotatable holder 40 by the coupling bolts 95 to fix the table bottom plate 81 to the rotatable holder 40. The rotation plate 90 is formed with a plurality of insertion holes 91 and 92 into which the guide through hole 74 and the through hole 75 of the rotatable bush are inserted, Is mounted on the rotatable bushing 70 so as to be pressed by the head 96 of the coupling bolt 95 screwed into the hole 44 '

Hereinafter, the operation of the table according to the present invention will be described in detail with reference to the attached drawings based on the horizontal state of the table.

FIG. 11 is an exemplary view showing an operating state of the present invention, FIG. 12 is an exemplary view showing a folding state of the present invention, and FIG. 13 is an exemplary view showing a loading state of the present invention,

When the table is maintained in a horizontal state, the first supporting step of the rotatable holder is held in contact with the first supporting part of the folding bush coupled to the folding holder so that the table can not be further rotated in the inward direction, and the horizontal state is maintained. (Table horizontal status - table use)

After the use of the table is completed, holding one side of the table in a horizontal position and lifting it in the outward direction causes the second support jaw of the rotation holder to be contacted and supported by the second support portion of the folding bush coupled to the folding holder The slide curved surface portion of the rotatide holder rotates along the folding portion of the folding bush and the table is raised in a vertical state by the rotation movement.

When the vertical standing table is rotated in the backward direction B, the rotary hole of the table is rotated along the upper bush of the rotary bush, and the rotary movement hole of the table is supported by the guide bore of the rotary bush. And the table is rotated 180 degrees downward about the center axis of the upper bush of the rotatable bush. (Table folding)

5, the folding holder is fixed to the support frame such that the center line CL of the pin insertion hole has an inclination angle? Of about 8 to 12 degrees with respect to the front F of the chair. When the table is to be folded with the rotary pin inserted into the pin insertion hole as the central axis, the folded table is rotated about 8 degrees with respect to the back (B) of the chair, as shown in Figs. 11 and 12 Is inclinedly folded so as to have an inclination angle [theta] of -12 [deg.].

When the table is folded with the predetermined inclination angle?, As shown in FIG. 13, even if a plurality of chairs are stacked, interference due to the table does not occur, and many chairs can be stored even in a small space.

When the folded table is used as described above, the table is rotated in the reverse order of the folding operation so that the table is maintained in a horizontal state.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Folding Holder (11): Fixing Bar
(11a): Bolt hole (12): Holder body
(13): pin insertion hole (13a): pin head hole
(13b): pin body hole (14): bush seat groove
(15): bushing connection hole (16): bushing fixing groove
(20): Rotate pin (21): pin head
(22): Pin body (23): Coupling hole
(24): bush support hole (25): socket tightening hole
(26): step jaw (30): folding bush
(31): first support portion (32): second support portion
(33): Folding part (33a): Lower part
(34): folding hole (35): folding guide
(35a): upper end (35b): lower end
(36): engaging projection
(40): Rotate Holder
(41): lower holder (42): upper holder
(43): center hole (43a): upper center hole
(43b): lower center hole (43c): stepped chin
(44): fastening hole (44 '): guide fastening hole
(45): first support jaw (46): second support jaw
(47): a slide curved surface portion (48): a guide fastening hole
(49): projection insertion hole (50): limit bush
(51): upper end (52): lower end
(60): connection socket (61): socket head
(62): socket body
(70): Rotate Bush
(71): lower end portion (72): upper end portion
(72a): outer surface (73): plate
(73a): plate lower surface (73b): plate upper surface
(74): guide through hole (75): through hole
(76): projection (80): table
(81): table bottom (82): table top
(83): Table Bolt (84): Rotate Hall
(85): rotational movement hole
(90): Rotate Plate
(91, 92): insertion hole (95): coupling bolt
(96): head (97): body
(100): chair (110): chair frame
(120): support frame (111): leg frame
(112): a seat frame

Claims (9)

A folding holder 10 in which a fixing bar 11 is inserted and fixed in an upper end of a hollow supporting frame 120 having a lower side connected to a chair frame 110,
A rotation pin 20 inserted into the pin insertion hole of the folding holder,
A folding bush 30 coupled to the bush seating groove of the folding holder so as to cover the bush seating groove,
A rotatable holder 40 that is in surface contact with the folding bush and folds along the folding surface,
A limit bushing 50 through which the rotatable holder, the folding bush and the folding holder are inserted and the lower end thereof is inserted into the fastening hole of the rotary pin,
A connection socket 60 inserted into the center hole of the rotatable holder so as to penetrate the limit bushing and the lower end thereof being fastened to the fastening hole of the rotation pin,
A rotatable bushing 70 coupled to an upper portion of the rotatable holder such that a lower end portion thereof is inserted into a center hole of the rotatable holder in which the connection socket is inserted,
A table 80 having a rotatable bush with an upper bush and a rotation hole into which a guide through hole is inserted,
And a rotation plate (90) which is located in the table and into which a through hole and a guide through hole of a rotatable bush are inserted and which is integrally connected to the rotatable bush and the rotate holder by an engagement bolt (95) Device.
The method of claim 1,
The folding holder 10 includes a fixing bar 11 inserted into the upper end of the support frame 120 to be bolted thereto and a cylindrical insertion hole 13 integrally formed with the fixing bar 11, And a holder body (12)
The holder body 12 includes a pin insertion hole 13 which is opened in one direction and into which the rotation pin 20 is inserted and a bush seating groove formed at a predetermined depth along the outer surface so that the folding bush 30 is inserted And a bushing coupling hole (15) through which the connection socket (60) is inserted so that the bush seating groove (14) and the pin insertion hole (13) are communicated with each other, .
The method of claim 2,
The holder body 12 has a structure in which the center line CL of the pin insertion hole is fixed to the support frame so as to have an inclination angle of 8 DEG to 12 DEG with respect to the front F so that the folded table is inclinedly folded Features folding table for chairs.
The method of claim 1,
The rotation pin 20 includes a pin body 22 having a coupling hole 23 and a pin head 21 formed in a layer with the pin body 22, A bush support hole 24 in which the bush is supported and a socket fastening hole 25 formed in the bush support hole 24 and formed in the step jaw 26 to be screwed into the connection socket 60 Folding table devices for chairs.
The method of claim 1,
The folding bush 30 includes a folding part 33 on one side of the rotation holder 40 and a folding part 33 on the other end of the folding part 33, A second support portion 32 formed on the other end of the folding portion 33 and supported by the other side of the rotatable holder 40 in a folding operation of the table, A folding hole 34 formed to penetrate the folding portion 33 and a folding hole 34 formed to protrude in the direction of the lower surface 33a of the folding portion along the periphery of the folding hole 34, And a coupling protrusion (36) protrudingly formed on one side of a lower surface (33a) of the folding unit and inserted and coupled into the bush fixing groove (16) of the folding holder.
The method of claim 1,
The rotary holder 40 includes a lower holder 41 which is rotated along the folding portion 33 of the folding bushing and a lower holder 41 which is formed integrally with the lower holder 41 and has a plurality of fastening holes 44 And a center hole (43) formed to pass through the upper holder (42) and the lower holder (41).
The method of claim 6, further comprising:
The lower holder 41 includes a first support protrusion 45 which is held in contact with one side of the folding bush 30 during folding operation of the table and a second support protrusion 45 which is in contact with the other side of the folding bush 30 And a slide curved surface portion 47 connecting the first and second support tongues 45 and 46 and sliding along the folding portion 33 of the folding bush,
The center hole 43 has an upper center hole 43a into which the connecting socket 60 and one side of the rotatable bushing 70 are inserted and an upper center hole 43a and a stepped portion 43c, And a lower central hole (43b) into which the connecting socket (60) and the limit bush (50) are inserted.
The method of claim 1,
The rotatable bushing 70 includes a plate 73 which is in contact with the upper holder 42 of the rotatable holder and a lower end 73a formed on the lower surface 73a of the plate and inserted into the center hole 43 of the rotatable holder. An annular upper end protrusion 72 protruding from the upper surface 73b of the plate and inserted into the rotation hole 84 of the table so as to be in close contact with the outer surface of the table, A plurality of through holes 75 protruding from the upper surface 73b of the plate so as to be positioned in the upper end portion 72, And a protrusion (76) protruding from one side of the lower surface (73a) of the folding table apparatus.
The method of claim 8,
Wherein the upper end portion (72) is formed to have a predetermined radius within a range in which the guide through hole (74) can be provided in the plate (73).

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