KR20170000761U

KR20170000761U - Reading desk set

Info

Publication number: KR20170000761U
Application number: KR2020150005569U
Authority: KR
Inventors: 정운태
Original assignee: 정운태
Priority date: 2015-08-20
Filing date: 2015-08-20
Publication date: 2017-03-02
Also published as: KR200483444Y1

Abstract

The present invention relates to a reading compass set, and more particularly, to a reading compass set which can be multi-stage including a reading compartment main body and a connecting beam.

Description

{Reading desk set}

Generally, a book reading unit is installed on a desk or the like so that a book can be easily seen. The reading unit includes an angle adjusting unit for adjusting the mounting plate at a predetermined angle to match the visual line, and a clamp for holding the book surface . Based on this basic structure, various design books are being released.

Reading books for a long time to look at books for various qualification tests and research are easy to feel fatigued due to long reading and fixed posture. In the case of examinees who are chased by time, it is not easy to take time separately for solving the fatigue, so it will be very helpful to improve the study efficiency of the examinees if they can solve it at the seat.

On the other hand, a reading desk needs to be firmly fixed on a desk, and there are many cases where it is carried and moved, so that it can be easily folded and unfolded. In addition, It is convenient.

Also, in the case of normal learning, rather than a single book, many books are often used. Therefore, it is desirable that the reading desk be composed of multiple books so that a plurality of books can be stored at the same time.

Korean Patent Publication No. 10-2006-0014347

The object of the present invention is to provide a bookbinding set capable of simultaneously mounting a plurality of books at the same time by easily configuring a bookblock in a multi-stage manner. have.

It is also an object of the present invention to provide a portable bookstore set which is easy to switch between a use state for reading and a folded state for carrying and can keep the constituent members fixed in a folded state.

The object of the present invention is to provide a reading desk main body supporting a book to be viewed by a user; And a connecting beam for connecting two or more bookshelf bodies in a vertical direction so that two or more books are placed side by side up and down,

The bookbinding body includes a main plate, which is a plate-like member, which is a portion where a book to be viewed by the user touches; A cradle for supporting the book by being folded at an angle with the main plate; And an inclination fixing unit for maintaining the attitude while the main plate is inclined with respect to the ground,

Wherein the inclined fixing unit comprises: a fixing part fixedly attached to a back surface of the main plate; A rotation support portion rotatably connected to the fixing portion and configured to adjust a tilting angle of the main plate by controlling a tilting angle; And a rotation support portion for supporting the rotation support portion and adjusting an angle between the rotation support portion and the fixing portion, wherein the fixing portion includes two fixing rods, and each of the fixing rods has a predetermined length Wherein the main plate has a rectangular beam shape and is arranged on the back surface of the main plate so as to extend in the vertical direction and spaced apart from each other at a predetermined interval in the left and right direction and disposed parallel to each other, Shaped member having a longer length and a width corresponding to an interval between the fixed rods, wherein a plurality of locking grooves are formed on the surface facing the main plate, , And both sides in the width direction on one side in the longitudinal direction are arranged on opposite sides of the lower portion of the two fixing rods And the angle between the rotation support portion and the main plate is variable, and one end of the rotation support portion is inserted into the engagement groove of the rotation support portion, And an upper fixing hole penetrating a predetermined depth downward is formed at an upper portion of each of the fixing rods, and a lower fixing hole penetrating a predetermined depth upwardly is formed at a lower portion thereof, Holes are formed,

The connecting beam has a predetermined length and a length to be inserted into the upper fixing hole or the lower fixing hole. The connecting beams are disposed on the upper portion of the load beam, An upper portion of the fixing rod protrudes upward in a state where a lower portion of the connecting beam is inserted into the fixing hole, and an upper portion of the fixing rod protruding upward is fixed to a lower portion of the fixing rod of the bookbinding body, And a bookbinder set inserted into the holes to couple the two bookbinder bodies to each other.

Preferably, the connecting beams include a lower beam, a middle beam, and an upper beam each having a predetermined length, and a first bent portion is provided between the upper beam and the intermediate beam, and the intermediate beam and the lower beam The lower beam is inserted into the upper fixing hole of the fixing rod of the bookbinding body located at the lower portion and the lower fixing hole of the fixing rod of the bookbinder body located at the upper portion is provided with a second bent portion, And a lower surface of the bookstore body is connected to the upper surface of the bookstore body, and a lower surface of the bookstore body located on the upper side is placed on the intermediate beam.

Preferably, the first bent portion has a side angle of 90 °, and the second bent portion has a side angle of 105 °.

Preferably, the fixing rod has a first insertion hole formed at one side in the longitudinal direction and partially penetrating in a lateral direction at a position facing each other, and the rotation supporting portion is formed by projecting in both lateral directions And a rotation protrusion that is inserted into the first insertion hole in both side directions so that the rotation support portion is rotatable with respect to the fixed rod.

Preferably, the fixing rod has a second insertion hole formed to be partially penetrated laterally at positions opposed to each other in the longitudinal direction middle portion, and the engagement support portion is located in a space between the two fixing rods, An insertion beam inserted into the retaining groove, two side beams bent at both sides of the insertion beam and bent at an angle of 90 with respect to the insertion beam and extending parallel to each other, and an angle between 90 at the end of each side beam And the rotation beam is inserted into each of the second insertion holes so that the engagement support portion is rotatable with respect to the fixed rod, The inclination angle of the main plate is varied by being selectively inserted into any one of the plurality of engagement grooves formed in the main plate.

Preferably, the length of the inserted beam corresponds to the distance of the distance between the fixed rods, and the distance between the pivoting projection and the insertion beam corresponds to the distance between any one of the pivot projection and the plurality of engagement grooves, Wherein the rotation support portion has a plurality of engagement grooves formed in parallel with each other on a surface facing the main plate, and the rotation support portion is provided with a plurality of engagement grooves extending continuously from the uppermost engagement groove and the lowermost engagement groove, Wherein when the engaging support portion and the rotation supporting portion are simultaneously brought into close contact with the rear surface of the main plate, a side beam of the engaging support portion is positioned in the side depression region, Wherein the engaging portion and the rotation supporting portion are located inside any one of the engaging grooves, After the plate has a configuration capable of in close contact with the face at the same time.

Preferably, two protruding bars extending in both lateral directions are disposed at the other opposite ends of the one end of the rotation support portion, and the rubber wheels disposed to surround the protruding bar are respectively disposed on the protruding bar , The rubber wheel abuts against the ground in use.

According to the bookstore of the present invention, since the bookstore can be configured in a multi-tier structure, a bookstore set can be provided which can mount a plurality of books at the same time.

In addition, it is easy to switch between the use state for reading and the folded state for carrying, and a portable bookstore set in which the constituent members can be kept fixed in a folded state can be provided.

1 is a perspective view schematically showing a configuration of a bookbinding set according to the present invention;
FIG. 2 is a perspective view of the reading stand shown in FIG. 1 in a folded state. FIG.
FIG. 3 is a rear perspective view of the book reader shown in FIG. 1 in a folded state; FIG.
Fig. 4 is an enlarged view of A and B in Fig. 3; Fig.
5 is a view showing a configuration of each member constituting an inclined fixing unit of the bookbinding unit shown in Fig.
FIG. 6 is a rear perspective view of the book reader shown in FIG. 1 in an opened state; FIG.
7 is a view for explaining the size of each part in the opened state of the bookbinding unit shown in Fig.
8 is a view for explaining the positions of the respective parts in a closed state of the bookbinding unit shown in Fig.
Fig. 9 is a side view showing a state in which the bookbinding unit shown in Fig. 1 is erected. Fig.
10 is a view showing the structure of the coupling beam shown in FIG.
11 is a view showing the connection between two bookbinder bodies and a connecting beam.
FIG. 12 is a side view showing a state where two bookshelves are erected in a connected state.

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

The expression of the directions of up, down, left, and right used in the specification of the present invention is shown in Fig. 1 based on the user viewing the main plate of the bookbinder of the present invention.

FIG. 1 is a perspective view schematically showing the construction of a bookbinding set 1 according to the present invention. FIG. 2 is a perspective view of the bookbinding unit 1 of the bookbinding set 1 shown in FIG. Fig. 3 is a rear perspective view of the bookbinding machine main body 2 shown in Fig. 1 in a folded state. Fig. 4 is an enlarged view of Figs. Fig. 6 is a view for explaining the size of each part in the opened state of the reading compartment body 2 shown in Fig. 1, Fig. 7 is a view for explaining the sizes of the respective parts in the closed state of the reading compartment body 2 shown in Fig. Fig. 8 is a view showing the configuration of each member constituting the tilt fixing unit 200 of the reading system body 2 shown in Fig. 1, and Fig. 9 is a view for explaining the position of the reading system body 2 Fig. 10 is a side view showing a state in which the connecting beam 3 shown in Fig. 1 is shown, Fig. View showing the connection between the two reading desk body 2 and connected to the beam (3), 12 is a side view showing an erected state in a state where the two reading desk body (2) is connected.

As shown in Fig. 1, the bookbinder set 1 according to the present invention is largely constituted by including a bookbinding body 2 and a connecting beam 3. As shown in Fig.

First, the reading desk main body 2 will be described.

The book reading unit main body 2 includes a main plate 100, a cradle 110, and a tilt fixing unit 200.

The main plate 100 is a portion of the main plate 100 which is in contact with the book viewed by the user together with the cradle 110 and forms a "B" character (or "L" character) when viewed from the side with the cradle 110. The main plate 100 is a plate-shaped member made of bamboo, wood, or the like, but is not limited thereto.

The cradle 110 is a member foldably coupled to the main plate 100 via a hinge 130 and serves to support a lower portion of the book. Two elastic supports 120 may be rotatably fixed to the cradle 110 so as to fix the pages of the books that are turned over.

The inclined fixing unit 200 includes a fixing part 210 coupled to the main plate 100, a rotation supporting part 220 rotatably fixed to the main plate 100, And a latching support part 230 which is rotatably fixed and can receive one end of the rotation support part 220.

The fixing part 210 includes two fixing rods 212 fixed to the rear surface of the main plate 100 at predetermined intervals in the left-right direction. Each fixed rod 212 is configured in the form of a rectangular beam extending with a predetermined length. Each of the fixed rods 212 is arranged so that the vertical direction of the main plate 100 and the longitudinal direction of the fixed rod 212 are aligned with each other. In other words, as shown in Fig. 3, it is arranged so as to extend in the vertical direction. In addition, the two fixing rods 212 are arranged parallel to each other at a predetermined interval.

Each fixing rod 212 has an upper fixing hole 216, a lower fixing hole 214, a first insertion hole 218, and a second insertion hole 219.

As shown in Fig. 4A, the lower fixing hole 214 is formed in the longitudinally upper portion of the fixing rod 212. As shown in Fig. The lower fixing hole 214 has a predetermined length in the longitudinal direction of the fixing rod 212 and is formed as a deep groove. 4, similarly to the upper fixing hole 216, the lower fixing hole 214 may be formed in a shape such that the back surface of the fixing rod 212 is recessed into a predetermined depth And a hole may be formed due to a space formed by the fixing rod 212 being closely attached to the back surface of the main plate 100. [

As shown in Fig. 4B, the upper fixing hole 216 is formed in the longitudinally upper portion of the fixing rod 212. As shown in Fig. The upper fixing hole 216 has a predetermined length in the downward direction of the fixing rod 212 and is formed as a deep groove. 4, the upper fixing hole 216 is formed by a groove whose back surface of the fixing rod 212 is recessed to a predetermined depth, and a fixing rod 212 is formed on the back surface of the main plate 100 The holes may be formed by a space formed by being closely contacted and bonded to the substrate.

As shown in Fig. 5, the first insertion hole 218 is formed on the inner surface of the fixed rod 212. [ Here, the inner surface means a surface facing each other when the two fixing rods 212 are attached to the back surface of the main plate 100 in the form of facing each other. The positions at which the first interpolation holes 218 are formed correspond to positions facing each other as the lower longitudinal direction portion of the fixing rod 212.

As shown in Fig. 5, a second interpolation hole 219 is formed in the inner surface of the fixed rod 212. As shown in Fig. The positions at which the second interpolation holes 219 are formed are formed in the longitudinally intermediate portion of the fixed rod 212 so as to correspond to positions facing each other. The second insertion hole 219 may be formed in a manner similar to the upper fixing hole 216 and the lower fixing hole 214, And a hole formed by the space formed by the fixing rod 212 being closely attached to the back surface of the main plate 100. [

The rotation supporting part 220 is formed of a plate-shaped member having a rectangular planar shape, and the width of the rotation supporting part 220 in the left and right direction corresponds to the distance between the two fixing rods 212. Meanwhile, according to one embodiment, when the planar shape of the rotary support 220 is not a quadrangle but includes curved lines or oblique lines on the right and left sides, a gap corresponding to the shape may be formed between the two rods . Therefore, the rotation supporting portion 220 can be held between the two fixing rods 212.

The rotation support part 220 has a rotation protruding part 224 protruding in the right and left direction on both lateral sides of the longitudinal direction one side part. The rotation supporting portion 220 is inserted into the first insertion hole 218 of the fixing rod 212 so that the rotation supporting portion 220 is rotatably connected to the fixing rod 212. That is, the rotation support part 220 is hinged to the fixed rod 212 and is rotatably fixed.

A plurality of engagement grooves 221 are formed on the back surface of the rotation support part 220. Here, the back surface means a surface facing the main plate 100.

The structure of the latching groove 221 is as follows. First, a locking recess 221 is formed to be long in the left and right direction on a rear surface of the rotation supporting part 220, and the locking recess 221 is arranged in parallel to each other in the vertical direction. Accordingly, the rotation supporting portion 220 is formed with the engagement protrusions 222, which are protruded between the recessed engagement grooves 221, alternately arranged on the back surface of the rotation support portion 220.

On the other hand, a lateral depression area 223 is formed on the side of the back surface of the rotation supporting part 220. The side depression area 223 is a recessed area connecting the uppermost latching groove 221 and the lowermost latching groove 221 and is formed in the left and right direction, respectively. Accordingly, the lateral width of the latching protrusion 222 described above is shorter than the entire lateral width of the rotation supporting part 220 due to the lateral depression area 223 formed on both sides. In addition, the side depression area 223 is formed to have the same depth as the engagement groove 221.

On the other hand, a non-slip rubber wheel 240 may be disposed on the rotation supporting part 220. The end of the rotation support part 220 comes into contact with the ground in use. A protruding bar protruding laterally from the rotation supporting part 220 and a rubber wheel 240 constrained to the protruding bar are installed on the end of the rotation supporting part 220 so as to contact the rubber wheel 240, It can be brought into contact with the ground surface.

It is preferable that a bookbinding pad installed on a desk is made of a rubber material that can greatly exert frictional force in contact with the surface of the desk so as to come into contact with the surface of the desk. For this purpose, it is common to affix a thin rubber plate to the surface of the desk. In the early stage of attachment, the rubber plate is attached to the book stand. However, when the rubber plate is used for a long time, the rubber plate often breaks off. As in the present invention, when the rubber wheel 240 is attached to a portion of the bookbinder that is in contact with the ground, the rubber plate can be avoided. In the case where the rubber wheel 240 is worn away from the ground, The wheel 240 is rotated so that a portion of the wheel 240 that has not contacted the ground comes into contact beforehand, so that the frictional force with the ground can be easily maintained for a long period of time.

The hooking support part 230 is located in a space between the two fixing rods 212. The latching support part 230 has an insertion beam 232 extending in the left and right direction to be inserted into the latching groove 221 and an insertion beam 232 having an angle between the insertion beam 232 and 90 at both sides of the insertion beam 232 Two side beams 234 that are folded and extend parallel to each other and two turning beams 236 that are bent at an angle of 90 from the end of each side beam 234 and extend so as to protrude outward on both sides . Accordingly, it has a C-shaped structure as a whole, with a C-shaped open end projecting to both sides.

The two rotating beams 236 are respectively inserted into the second insertion holes 219 formed in the fixed rod 212 and can rotate with respect to the fixed rod 212. The latching support portion 230 is pivoted to the fixing rod 212 and selectively inserted into the plurality of latching recesses 221 so that the angle between the rotation supporting portion 220 and the main plate 100 is varied The tilt angle of the reading desk can be adjusted.

The length of the insertion beam 232 in the left and right direction corresponds to the distance between the fixed rods 212 so that the coupling support 230 can be located in the space between the two fixing rods 212. The vertical length of the side beam 234 corresponds to the distance between the second insertion hole 219 and the upper end of the fixed rod 212. Here, the term " correspondence " is not necessarily limited to a match, but includes a similar range. Accordingly, most of the latching portions 230 are located in the space between the two fixing rods 212.

This relationship is more clearly understood with reference to FIGS. 6 and 7. FIG. That is, the width D1 of the insertion beam 232 and the width D2 between the two fixing rods 212 are substantially corresponding. The width D3 of the latching protrusion 222 is shorter than the width D1 of the insertion beam 232. [

The distance L1 between the turning projection 224 and the insertion beam 232 corresponds substantially to the distance L2 between the turning projection 224 and any one of the latching grooves 221. [ Here, preferably, it may be the uppermost engaging groove 221.

With this configuration, when the bookbinding unit main body 2 is folded as shown in FIG. 7, the latching support portion 230 can be positioned in the rotation support portion 220. That is, the insertion beam 232 is located in the uppermost engaging groove 221, and the side beam 234 can be positioned in the side depression area 223.

When it is necessary to move or store the reading compartment main body 2, the reading compartment main body 2 can be folded into a flat state as shown in Fig. In this state, in order to use the state as shown in the drawing, the latching support part 230 is brought into close contact with the back surface of the main plate 100, and then the rotation support part 220 is also brought into close contact with the back surface of the main plate 100.

When the rotation support part 220 is closed and the back surface of the rotation support part 220 is brought into close contact with the back surface of the main plate 100 according to the above configuration, 232 are positioned in the engaging groove 221 formed in the rotation supporting portion 220 and the side beams 234 are positioned in the side depression region 223 and the rotation supporting portion 220, the main plate 100, 230 and the main plate 100 are achieved. 7, the latching support portion 230 and the rotation support portion 220 are brought into close contact with the main plate 100 and the latching support portion 230 is brought into close contact with the rotation support portion 230. [ It can be placed in the space in the housing 220 and concealed. At this time, since the latching support part 230 is positioned and concealed in the rotation support part 220, the whole of the latching part 230 is exposed to the outside or shaken portion is reduced, so that the risk of breakage is reduced, and a compact configuration can be obtained. In other words, for example, when the engaging supporter 230 moves to a state exposed to the outside, the engaging supporter 230 may be severely moved to increase the risk of breakage. However, according to the present invention, This reduces the risk.

Hereinafter, the connecting beam 3 will be described.

The connection beam 3 has a predetermined length to be inserted into the upper fixing hole 216 and the lower fixing hole 214 formed in the fixing rod 212.

Specifically, one connecting beam 3 comprises a lower beam 314, an intermediate beam 312, and an upper beam 310, each having a predetermined length. A first bend 320 is provided between the upper beam 310 and the intermediate beam 312 so that the upper beam 310 and the intermediate beam 312 have a predetermined first angle? A second bending portion 322 is provided between the lower beam 314 and the intermediate beam 312 and the lower beam 314 has a predetermined second angle? Here, preferably, the first inter-angle? 1 is 90 占 and the second inter-angle? 2 is 105 占.

The connecting beam 3 is a relatively rigid member which can firmly support the reading compartment body 2, and may be made of a material such as steel.

11 and 12, the coupling between the bookbinder body 2 by the connecting beams 3 will be described below.

The lower beam 314 of the connecting beam 3 is inserted into the upper fixing hole 216 of the fixing rod 212 of the bookbinding table body 2 located at the lower side while the two bookbinder bodies 2 are arranged side by side ) Is inserted. At this time, when the lower beam 314 is inserted to some extent, the intermediate beam 312 is held in contact with the upper surface of the main plate 100 of the bookbinding body 2 located at the lower side. At this time, the upper beam 310 of the connecting beam 3 is exposed upward.

Then, the upper beam 310 protruded upward is inserted into the lower fixing hole 214 of the fixing rod 212 of the bookbinding body 2 located at the upper side. As the upper beam 310 is inserted into the lower fixing hole 214, the coupling between the reading glasses is achieved and the bottom surface of the upper reading book body 2 is positioned on the middle beam 312, As shown in Fig.

Accordingly, the reading frame body 2 can achieve a two-stage structure with a simple and compact structure. In addition, since the reading head main body 2A located at the upper portion and the reading head main body 2B located at the lower portion have the same structure, the positions of the lower portion and the upper portion are variable, and a selective configuration can be achieved. That is, it is also possible to place the book reading unit located at the upper portion and the reading book located at the lower portion at the upper portion. In addition, it is possible to connect not only two books, but also three or more books. In addition, since the connecting beams 3 are inserted into the two fixing rods 212, the connecting beams 3 are connected to each other in a two-by-one manner, so that it is possible to achieve a solid support even when the reading unit is shaken or moved.

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 embodiments, but, on the contrary, I will understand the point. Therefore, the true scope of technical protection of the present invention should be determined by the technical idea of the appended utility model registration claim scope.

1: Reading set
2: reading desk body
3: connecting beam
100: Main plate
110: Cradle
120: elastic support
130: Hinges
200: inclined fixing unit
210:
212: Fixed rod
214: Lower fixing hole
216: upper fixing hole
218: first interpolation hole
219: second insertion hole
220:
221: Retaining groove
222:
223: side depression area
224:
230:
232: Insertion beam
234: side beam
236: rotating beam
240: Rubber wheel
310: upper beam
312: intermediate beam
314: Lower beam
320: first bend section
322:

Claims

A reading unit main body supporting a book to be viewed by a user; And
A connecting beam connecting two bookshelf bodies vertically so that two or more books are placed side by side up and down;
A book reader set,
The bookbinding body includes:
A main plate which is a plate-like member and which is in contact with a book to be viewed by a user;
A cradle for supporting the book by being folded at an angle with the main plate; And
And an inclined fixing unit for maintaining the attitude of the main plate while being inclined with respect to the ground,
The inclined fixing unit includes:
A fixing unit fixedly attached to a back surface of the main plate;
A rotation support portion rotatably connected to the fixing portion and configured to adjust a tilting angle of the main plate by controlling a tilting angle; And
And a latch support portion for supporting the rotation support portion and adjusting an angle between the rotation support portion and the fixing portion,
The fixing unit includes:
Wherein each of the fixing rods has a rectangular beam shape extending with a predetermined length and is arranged on the back surface of the main plate so as to extend in the vertical direction, Spaced apart and disposed parallel to each other,
Wherein the rotation support portion is constituted by a plate-like member having a length corresponding to a length of the fixing rod and a width corresponding to a distance between the fixing rods, wherein a plurality of locking grooves are formed on the surface facing the main plate, Wherein the first and second fixing rods are disposed in a space between the fixing rods, and both sides in the width direction on one side in the longitudinal direction are connected to the opposed surfaces of the lower portions of the two fixing rods, and are rotatably connected to the fixing rods, The angle between the main plates is variable,
Wherein the engaging support portion is fixed to the rotation support portion so that the angle between the rotation support portion and the main plate is kept constant by being inserted into the engaging groove of the rotation support portion,
An upper fixing hole penetrating a predetermined depth downward is formed at an upper portion of each of the fixing rods and a lower fixing hole penetrating a predetermined depth upward is formed at a lower portion thereof,
The connecting beam
A lower fixing hole having a predetermined length to be inserted into the upper fixing hole or the lower fixing hole,
An upper portion of the fixing rod protrudes upward in a state where a lower portion of the connecting beam is inserted into an upper fixing hole of the load beam of a bookbinding body located at a lower portion in a state where the two bookbinder bodies are arranged side by side, Wherein an upper portion of the fixing rod protruding upward is inserted into a lower fixing hole of the fixing rod of the bookbinding body located at the upper portion so that the two bookbinding bodies are coupled to each other.

The method according to claim 1,
The connecting beam
A lower beam, a middle beam, and an upper beam each having a predetermined length,
A first bending portion is provided between the upper beam and the intermediate beam,
A second bending portion is provided between the intermediate beam and the lower beam,
The lower beam is inserted into the upper fixing hole of the fixing rod of the bookbinder body located at the lower portion and the upper beam is inserted into the lower fixing hole of the fixing rod of the bookbinder body located at the upper portion, The lower reading frame body is connected to each other,
And a lower surface of the reading compartment main body located on the upper side is placed on the intermediate beam.

3. The method of claim 2,
Wherein the first bent portion has a side angle of 90 °,
And the second bent portion has an angle of < RTI ID = 0.0 > 105. &Lt; / RTI >

The method according to claim 1,
The stationary rod
And a first insertion hole formed at one side in the lengthwise direction and partially penetrating laterally at a position facing each other,
The rotation support portion
And a pivoting protrusion protruding in both lateral directions on the side of the length " ull " and being inserted into the first insertion holes in both lateral directions so that the pivoting support portion can be rotated relative to the fixed rod.

5. The method of claim 4,
The stationary rod
And a second insertion hole formed to be partially penetrated in a lateral direction at a position facing each other in the longitudinally intermediate portion,
The hook-
And a plurality of fixed rods disposed in a space between the two fixed rods,
An insertion beam inserted into the latching groove,
Two side beams bent at an angle of 90 [deg.] With the insertion beam on both sides of the insertion beam and extending parallel to each other, and
And two turning beams bent at an angle of 90 DEG at the ends of the respective side beams and extending outward on both sides,
Wherein each of the pivot beams is inserted into the second insertion hole so that the latching portion is rotatable with respect to the fixed rod,
Wherein the inclination angle of the main plate is varied by selectively inserting the insertion beam into any one of a plurality of engagement grooves formed in the rotation support portion.

6. The method of claim 5,
The length of the inserted beam corresponds to the distance of the distance between the fixed rods,
Wherein a distance between the pivoting projection and the insertion beam corresponds to a distance between any one of the pivoting projection and the plurality of engagement grooves,
The rotation support portion
Wherein a plurality of the engagement grooves are formed in parallel with each other on a surface facing the main plate,
A side depression area continuously extending from the uppermost engaging groove and the lowermost engaging groove is formed in a side portion of the side facing the main plate,
Wherein when the latching support portion and the rotation support portion are simultaneously brought into close contact with the rear surface of the main plate, the side beam of the latching support portion is located in the side depression region and the insertion beam is positioned in any one of the plurality of latching grooves ,
And the latching support portion and the rotation support portion can be brought into close contact with the back surface of the main plate at the same time.

5. The method of claim 4,
Wherein two protruding rods extending in both lateral directions are disposed at the opposite ends of one end of the rotation support portion of the rotary support portion, the rubber wheels arranged to surround the protruding rods are disposed on the protruding rods, Wherein the rubber wheel is in contact with the ground.