Book View Platform

Abstract

This book stand provides a stable holder for a large number of sheet music, music stand sheets, music books, and other similar items. [Solution] The device consists of two book boards for holding books or documents upright, and a base for supporting the two book boards. The base comprises a base portion and a rail portion with rail grooves extending in the left-right direction for supporting the lower part of the book boards so as to be slidable in the left-right direction. The book boards have projections at their lower ends that contact the mounting surface on which the base is placed.

Description

Technical Field

[0001] The present invention relates to a music stand for holding sheet music or books and using them on a desk.

Background Art

[0002] Conventionally, music stands for holding sheet music or books and using them on a desk have been used, and those used especially when playing musical instruments are called music stands or score stands. As such a score stand, the score stand of Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the score stand of Patent Document 1, by moving two plates as support parts in the left-right direction, a gap can be provided between the two plates. Therefore, the back cover part of the sheet music book can be projected backward from the gap, and by preventing the swelling of the back cover part, the paper surface of the opened sheet music book can be made easy to see.

[0005] However, in the score stand of Patent Document 1, when arranging and placing a large number of sheets of sheet music in a state where the two plates are widely separated, or when opening and placing a score board with a plurality of sheets of sheet music pasted thereon, it is likely to tilt in the left-right direction, and there is a problem that it is difficult to stably hold the sheet music or the score board.

[0006] The present invention has been made paying attention to such problems, and an object thereof is to provide a music stand that can stably lean and hold a large number of books such as sheet music, score boards, and sheet music books.

Means for Solving the Problems

[0007] To solve the aforementioned problems, the book stand of the present invention is The device comprises two book boards for holding books or documents upright, and a base for supporting the two book boards. The base includes a base portion and a rail portion with rail grooves extending in the left-right direction for supporting the lower part of the book boards so as to be slidable in the left-right direction. The book boards are characterized by having projections at their lower ends that contact the mounting surface on which the base is placed. This feature allows the two reading boards to slide horizontally within the rail groove, creating a large gap between them. For example, it is possible to prop up and hold three musical scores or a music stand with multiple scores attached to the two reading boards. Furthermore, the protrusions on the reading boards contact the mounting surface on which the base is placed, preventing the reading stand from tilting horizontally. This allows for stable propping up and holding of musical scores or music stands on the two widely spaced reading boards.

[0008] The book stand of the present invention is characterized in that a protruding latching portion is provided on at least one of the back surface or front surface of the lower part of the book board, the cross-sectional shape of the rail groove is substantially the same as the cross-sectional shape of the lower part of the book board on which the latching portion is provided, and the lower part of the book board and the rail groove can be fitted together. According to this feature, the cross-sectional shape of the rail groove and the cross-sectional shape of the lower part of the reading board where the latching part is provided are approximately the same. As a result, the latching part catches within the rail groove, making it difficult for the two reading boards to slip out of the rail groove.

[0009] The book stand of the present invention is characterized in that the lower parts of the two book boards facing each other are provided with vertical guides that do not have the aforementioned latching parts. This feature allows the guide to be inserted into the rail groove from approximately above the rail groove while the two reading boards are spaced apart, as there is no latching mechanism in the guide. This makes it easy to attach the two reading boards to the rail groove.

[0010] The book stand of the present invention is characterized in that the surface of the book board is provided with a support portion at the bottom. This feature prevents the sheet music, music stand, or book from sliding off the reading board, as the receiving portion restricts the forward movement of the sheet music or book by placing the bottom of the book on the receiving portion.

[0011] The book stand of the present invention is characterized in that the two book plates are able to come into contact with each other on their opposing surfaces. According to this feature, when the opposing surfaces of the two reading boards are in contact with each other, the respective latches located at the bottom of each reading board are fully fitted into the rail groove, making it most difficult for the two reading boards to come loose from the rail groove.

[0012] The book stand of the present invention is characterized in that the receiving portion is composed of a receiving portion bottom plate and a receiving portion side plate extending upward at approximately a right angle from the front end of the receiving portion bottom plate, and the base portion can be housed in a space formed by bringing the back surface of the upper part of one book board into contact with the back surface of the receiving portion side plate provided on the other book board, and bringing the back surface of the upper part of the other book board into contact with the back surface of the receiving portion side plate provided on the one book board, when the surfaces of two book boards are facing each other with their top and bottom inverted. This feature allows the base portion that constitutes the stand to be inserted into the space formed by the surfaces of the two reading boards and the bottom plates that support the two reading boards, thus enabling the disassembled reading stand components to be stored together in a compact and integrated manner. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing a book stand in Embodiment 1 of the present invention. [Figure 2] (a) to (e) are six-view drawings of the bookstand in Example 1, with the rear view omitted. [Figure 3] This is a perspective view showing the reading board of the bookstand in Example 1. [Figure 4](a) is a rear view showing the right writing board of the writing desk in Example 1, and (b) is a left side view of the same right writing board. [Figure 5] (a) is a perspective view showing the pedestal of the writing desk in Example 1, and (b) is a right side view showing the same pedestal. [Figure 6] (a) to (c) are partial perspective views and partial cross-sectional views explaining the assembly procedure of the writing desk in Example 1. [Figure 7] (a) is a front view showing the state where the writing boards of the writing desk in Example 1 are greatly separated, (b) is a front view showing the state where three sheet music scores are leaned and held on the greatly separated writing boards, and (c) is a front view showing the state where a sheet music stand with four sheet music scores pasted is leaned and held. [Figure 8] (a) is a front view showing the state where the writing boards of the writing desk in Example 1 are slightly separated, (b) is a front view showing the state where a sheet music book is leaned and held on the slightly separated writing boards, and (c) is a rear view of the same. [Figure 9] (a) is a side view explaining the state where the surfaces of the two writing boards of the writing desk in Example 1 face each other, (b) is a side view explaining the state where the two writing boards are combined, and (c) is a perspective view explaining the state where the two writing boards and the pedestal are combined. [Figure 10] It is a front view showing the writing desk in Example 2 of the present invention. [Figure 11] It is a perspective view showing the writing desk in Example 3 of the present invention. [Figure 12] (a) to (c) are front views explaining the procedure of rolling the paper surface of the sheet music book leaned and held on the writing board of the writing desk in Example 3.

Mode for Carrying Out the Invention

[0014] The mode for carrying out the writing desk according to the present invention will be described below based on examples.

Examples

[0015] The music stand according to Embodiment 1 will be described with reference to FIGS. 1 to 9. Hereinafter, the left side of the paper surface of FIG. 1 will be described as the front side (front) of the music stand, and the right side of the paper surface of FIG. 1 will be described as the back side (rear) of the music stand.

[0016] The music stand of the present invention is an assembled music stand mainly used on a tabletop, and can stably hold and lean a large number of books such as music scores, music score papers, and music score books on two spaced-apart music score plates.

[0017] As shown in FIGS. 1 and 2, the music stand 1 is mainly composed of music score plates 10L and 10R for holding and leaning music scores and books, and a pedestal 15 for supporting the music score plates 10L and 10R arranged side by side left and right. Each member of the music stand 1 is formed of a synthetic resin. Thereby, the music stand 1 can be lightened.

[0018] As shown in FIG. 3, each of the music score plates 10L and 10R is composed of an upper frame portion 10a having a width of about 20 mm, a lower frame portion 10b having a width of about 30 mm, an inner frame portion 10c having a width of about 15 mm, an outer frame portion 10d having a width of about 15 mm, and a central frame portion 10e having a width of about 10 mm, and is formed in a bilaterally symmetric plate shape with an overall height of about 220 mm, a width of about 150 mm, and a thickness of about 3 mm. In the music score plates 10L and 10R, substantially rectangular openings 10f and 10f are formed inside, respectively. Thereby, the music score plates 10L and 10R can be lightened.

[0019] As shown in FIGS. 4(a) and (b), at the left and right centers of the lower end of the lower frame portion 10b constituting the music score plate 10R, latching portions 11 protruding obliquely upward toward the back side are formed across the left and right directions. Note that latching portions 11 are also formed at the lower ends of the lower frame portions 10b constituting the music score plate 10L (not shown) symmetrically with the music score plate 10R in the left and right directions.

[0020] As shown in the right-hand figure of Figure 6(c), the cross-sectional shape of the lower frame portion 10b on which the latching portion 11 is formed is substantially the same as the cross-sectional shape of the rail groove 17a, which will be described later. As a result, the lower frame portion 10b on which the latching portion 11 is formed fits into the rail groove 17a, making it difficult for the reading boards 10L and 10R to come out of the rail groove 17a.

[0021] As shown in Figure 4(a), a vertical guide portion 12 without a locking portion 11 is formed on the right end of the back surface of the lower frame portion 10b that constitutes the reading board 10R. Note that a guide portion 12 is also formed on the back surface of the lower frame portion 10b that constitutes the reading board 10L (not shown), symmetrically to that of the reading board 10R. As a result, the guide portion 12 can be inserted into the rail groove 17a from approximately above the rail groove 17a (see Figure 6(a)), and as will be described later, the lower frame portion 10b with the locking portion 11 can be easily fitted into the rail groove 17a.

[0022] As shown in Figure 4(a), a projection 13 is integrally formed at the right end of the lower end of the lower frame portion 10b that constitutes the book board 10R, projecting downwards. A projection 13 is also integrally formed on the lower frame portion 10b that constitutes the book board 10L (not shown), symmetrically to that of the book board 10R.

[0023] As shown in Figure 1, the projections 13, 13 provided on the book boards 10L and 10R are located to the left and right of the rail section 17 provided in front of the base section 16, and contact the mounting surface of a table or the like on which the base 15 is placed. In other words, the downward projection length of the projections 13, 13 is approximately the same as the thickness of the rail section 17 below the rail groove 17a. As a result, the book stand 1 is prevented from tilting in the left and right directions, and a large number of sheet music or music stand sheets can be stably propped up and held on the book boards 10L and 10R that are extended to the left and right from the rail groove 17a, respectively.

[0024] As shown in Figure 3, the protrusions 13, 13 are formed directly below the outer frame portions 10d, 10d that constitute the book boards 10L, 10R, respectively. This allows the protrusions 13, 13 to reliably support the weight applied to the outer frame portions 10d, 10d, thereby increasing the structural strength of the book stand 1.

[0025] As shown in Figure 3, the surfaces of the lower frame portions 10b, 10b that make up the book boards 10L, 10R are formed with receiving portions 14, 14, respectively, to receive and support the lower part of sheet music or books that are propped up and held on the book boards 10L, 10R. The receiving portion 14 consists of a receiving portion bottom plate 14a and a receiving portion side plate 14b. The receiving portion bottom plate 14a protrudes almost horizontally from the surface of the lower frame portion 10b, with a protrusion width of approximately 16 mm and a thickness of approximately 5 mm (see Figure 4(b)). The receiving portion side plate 14b is erected in front of the upper surface of the receiving portion bottom plate 14a, with a height of approximately 17 mm and a thickness of approximately 3 mm (see Figure 4(b)). As a result, the receiving portions 14, 14 restrict the forward movement of sheet music, sheet music holders, or books, thereby preventing sheet music, sheet music holders, or books from sliding off the book boards 10L, 10R.

[0026] As shown in Figures 5(a) and (b), the base 15 is composed of a base portion 16 and a rail portion 17 formed in front of the base portion 16.

[0027] As shown in Figures 5(a) and (b), the base portion 16 is composed of a front frame portion 16a with a width of approximately 7 mm, a rear frame portion 16b with a width of approximately 10 mm, a right frame portion 16c with a width of approximately 15 mm, a left frame portion 16d with a width of approximately 15 mm, and a central frame portion 16e with a width of approximately 10 mm. The entire structure is formed in the shape of a plate with a width of approximately 200 mm, a depth of approximately 150 mm, and a thickness of approximately 9 mm. Inside the base portion 16, there are roughly rectangular openings 16f, 16f with a width of approximately 80 mm and a depth of approximately 130 mm. This makes it possible to reduce the weight of the pedestal 15.

[0028] As shown in Figures 5(a) and 5(b), the rail section 17 is located in front of the base section 16 and is formed in a roughly V-shape when viewed from the side, with a width of approximately 220 mm, a depth of approximately 25 mm, and a height of approximately 20 mm.

[0029] As shown in Figure 5(a), the rail section 17 has a rail groove 17a formed in the left-right direction. Furthermore, the rail groove 17a is formed in a substantially L-shape, which is substantially the same as the cross-sectional shape of the lower frame sections 10b, 10b on which the latching parts 11, 11 are formed. As a result, the lower frame sections 10b, 10b on which the latching parts 11, 11 are formed fit into the rail groove 17a (see Figure 6(c)), making it difficult for the reading boards 10L, 10R to come out of the rail groove 17a.

[0030] Furthermore, as shown in Figure 5(b), the angle θ between the front surface and the bottom surface of the rail groove 17a (hereinafter referred to as the "angle of inclination θ of the rail groove 17a") is approximately 75°. This angle θ is preferably in the range of 40° to 75°, as this causes the reading boards 10L and 10R that fit into the rail groove 17a to tilt backward (see Figure 1), making it easier to see the pages of the musical scores 20 and 20 held on the reading boards 10L and 10R.

[0031] Next, we will explain an example of the assembly procedure for book stand 1.

[0032] First, tilt the right-hand reading board 10R to match the inclination angle θ of the rail groove 17a, and align the guide portion 12 at the left end of the reading board 10R with the upper right end of the rail groove 17a (see Figure 6(a), left and right). Next, slide the reading board 10R downwards until the lower end of the guide portion 12 contacts the bottom surface of the rail groove 17a (see Figure 6(b), left and right). Next, slide the reading board 10R to the left, and the lower frame portion 10b with the locking portion 11 will fit into the rail groove 17a (see Figure 6(c), left and right). Next, fit the left-hand reading board 10L into the rail groove 17a from the left side using the same procedure (not shown).

[0033] In this assembly procedure, the lower frame portion 10b constituting the right-hand reading board 10R was fitted into the rail groove 17a first. However, the lower frame portion 10b constituting the left-hand reading board 10L may be fitted into the rail groove 17a first, or the reading boards 10L and 10R may be fitted into the rail groove 17a almost simultaneously.

[0034] Next, we will describe the state in which the two musical scores 20, 20 are propped up and held on the reading boards 10L, 10R that make up the reading stand 1. The musical scores 20 used are approximately A4 size.

[0035] As shown in Figure 1, the book boards 10L and 10R have opposing surfaces of their respective inner frame portions 10c, 10c in contact. At this time, the latching portions 11, 11 formed on the lower frame portions 10b, 10b that make up the book boards 10L and 10R are fitted into the rail groove 17a to the maximum extent. As a result, the book boards 10L and 10R are in a state where they are least likely to come out of the rail groove 17a.

[0036] As shown in Figure 1, the left and right musical scores 20, 20 are placed on the left and right receiving parts 14, 14 respectively, and are propped up and held in place on the reading boards 10L, 10R, respectively. At this time, the lower part of the musical scores 20, 20 is restricted from moving forward by the receiving part side plates 14b, 14b. This makes it difficult for the musical scores 20, 20 to slip off the reading boards 10L, 10R, which are tilted backward.

[0037] Next, we will describe the state in which the three musical scores 20, 20, and 20 are propped up and held on the reading boards 10L and 10R that make up the reading stand 1.

[0038] As shown in Figure 7(a), before the music scores 20, 20, 20 are held in place, the reading stand 1 has the reading boards 10L and 10R spaced far apart. The distance between the spaced reading boards 10L and 10R is narrower than the width of the music scores 20 that will be held by the reading boards 10L and 10R. At this time, considering the stiffness of the paper of the music scores 20, it is desirable to set the width so that the music scores 20, which are propped up and held across the reading boards 10L and 10R, do not bend backward and fall out easily.

[0039] As shown in Figure 7(b), the central score 20 is placed on the left and right support sections 14, 14 and propped up and held in place across the reading boards 10L, 10R. The left and right scores 20, 20 are each placed on the left and right support sections 14, 14 and propped up and held in place across the reading boards 10L, 10R, respectively. At this time, the right edge of the left score 20 overlaps with the upper part of the left edge of the central score 20, and the left edge of the right score 20 overlaps with the upper part of the right edge of the central score 20. As a result, the central score 20 is less likely to bend further backward and fall out from between the separated reading boards 10L, 10R.

[0040] Furthermore, as shown in Figure 7(b), the protrusions 13, 13 formed on the reading boards 10L, 10R are in contact with the mounting surface of the reading stand 1. This prevents the reading stand 1 from tilting to the left or right, allowing the three musical scores 20, 20, 20 to be stably propped up and held on the reading boards 10L, 10R, which are extended far to both sides from the rail groove 17a.

[0041] Next, we will describe the state in which the music stand 21, to which the four music scores 20, 20, 20, 20 are attached, is propped up and held on the book boards 10L and 10R that make up the book stand 1.

[0042] As shown in Figure 7(c), the music score mount 21 is a rectangular piece of cardboard with its longer side in the left-right direction, and is composed of mount surfaces 21a, 21b, 21c, and 21d of approximately the same area. Folds 21e, 21f, and 21g are formed vertically between mount surface 21a and mount surface 21b, between mount surface 21b and mount surface 21c, and between mount surface 21c and mount surface 21d, respectively. Note that folds 21e, 21f, and 21g are valley folds when viewed from the paper side. The four music scores 20, 20, 20, and 20 are attached to mount surfaces 21a, 21b, 21c, and 21d, respectively.

[0043] As shown in Figure 7(c), the music stand 21 is placed across the support portions 14, 14 formed on the spaced-apart book boards 10L, 10R, and is propped up and held in place across the book boards 10L, 10R. At this time, the right edge of the stand surface 21a is propped up and held in place on the book board 10L, and the left edge of the stand surface 21d is propped up and held in place on the book board 10R. As a result, the stand surfaces 21a and 21d are less likely to bend significantly backward.

[0044] Furthermore, the mounting board surface 21b is propped up and held against the book board 10L, and the mounting board surface 21c is propped up and held against the book board 10R. At this time, the fold line 21e is located to the left of the central frame portion 10e (see Figure 3), which is the center line of the book board 10L, and the fold line 21g is located to the right of the central frame portion 10e (see Figure 3), which is the center line of the book board 10R. As a result, the mounting board surfaces 21b and 21c are propped up and held against the book boards 10L and 10R respectively in a nearly stable state, so the music score mounting board 21 is less likely to bend backward from between the spaced-apart book boards 10L and 10R.

[0045] Furthermore, as shown in Figure 7(b), the protrusions 13, 13 formed on the book boards 10L, 10R are in contact with the mounting surface of the book stand 1. This prevents the book stand 1 from tilting in the left-right direction, allowing the music stand 21 to be stably propped up and held on the book boards 10L, 10R, which are extended far to both sides from the rail groove 17a.

[0046] Furthermore, the protrusions 13, 13 are formed directly below the outer frame portions 10d, 10d that constitute the book boards 10L, 10R, respectively (see Figure 3). As a result, the protrusions 13, 13 can reliably support the weight of the music stand 21 that rests on the outer frame portions 10d, 10d, thereby increasing the structural strength of the book stand 1 and allowing the music stand 21 to be stably propped up and held on the book boards 10L, 10R.

[0047] Next, we will describe the state in which the sheet music book 22 is propped up and held on the reading boards 10L and 10R that make up the reading stand 1.

[0048] As shown in Figure 8(a), before the music book 22 is held in place, the reading stand 1 has the reading boards 10L and 10R slightly separated. At this time, it is desirable that the distance between the separated reading boards 10L and 10R be slightly wider than the thickness of the spine 22a of the music book 22.

[0049] As shown in Figure 8(b), the music book 22 is placed on the left and right support sections 14, 14 in an open state and propped up and held by the reading boards 10L, 10R. At this time, the spine 22a of the music book 22 protrudes backward from between the reading boards 10L and 10R (see Figure 8(c)). This reduces the problem of the spine 22a bulging and making the pages 22b, 22b difficult to read.

[0050] Furthermore, the lower part of the music book 22 is restricted from moving forward by the support parts 14, 14, making it less likely for the music book 22 to slip off the reading boards 10L, 10R. In addition, the support parts 14, 14 restrict the curling of the pages of the music book 22, allowing the music book 22 to remain open.

[0051] Next, we will explain how to reassemble and store the disassembled components of the bookstand 1.

[0052] First, reverse the vertical orientation of the reading board 10L and the reading board 10R so that their surfaces face each other (see Figure 9(a)).

[0053] Next, the back surface of the upper frame portion 10a constituting the book board 10R is brought into contact with the back surface of the receiving side plate 14b formed on the book board 10L, and the back surface of the upper frame portion 10a constituting the book board 10L is brought into contact with the back surface of the receiving side plate 14b provided on the book board 10R, thereby combining the book board 10L and the book board 10R. At this time, a space is formed between the surfaces of the book boards 10L and 10R, the upper surface of the receiving bottom plate 14a formed on the book board 10L, and the upper surface of the receiving bottom plate 14a formed on the book board 10R (see Figure 9(b)).

[0054] Finally, the base portion 16 that constitutes the base 15 is inserted into the space to combine it with the reading boards 10L and 10R. At this time, the rail portion 17 that constitutes the base 15 is not inserted into the space, but is in contact with the sides of the reading boards 10L and 10R (see Figure 9(c)).

[0055] As shown in Figure 9(c), the bookstand 1, when the book plates 10L and 10R and the base 15 are combined, forms a roughly flat plate with a width of approximately 240 mm, a depth of approximately 175 mm, and a thickness of approximately 25 mm, roughly the size of a B5 paper. As a result, the bookstand 1 can be stored as a single, compact unit by combining its components after disassembly. [Examples]

[0056] Next, the reading stand according to Embodiment 2 will be described with reference to Figure 10. Note that components that are identical to those in the previous embodiment and therefore redundant will be omitted.

[0057] As shown in Figure 10, the bookstand 101 of this embodiment 2 differs from the bookstand 1 of embodiment 1 in that it uses book boards 110L and 110R with patterns formed on their surfaces. The book boards 110L and 110R are provided with multiple openings 110f so that a treble clef pattern 110g and a musical note pattern 110b are formed when viewed from the front. This gives the book boards 110L and 110R a decorative function. In addition, since the patterns 110g and 110b are formed by providing multiple openings 110f, the book boards 10L and 10R can be made lighter. [Examples]

[0058] Next, the bookstand according to Embodiment 3 will be described with reference to Figures 11 and 12. Note that components that are identical to those in the previous embodiment and therefore redundant will be omitted.

[0059] As shown in Figure 11, the book stand 201 of this embodiment 3 differs from the book stand 1 of embodiment 1 in that the book boards 210L and 210R are not composed of separate frame parts but are in the shape of a single board, the book boards 210L and 210R have strip-shaped magnetic rubber 218, 218 on the upper part of their surfaces, and the right side of the receiving side plate 214b formed on book board 210L and the receiving side plate 214b formed on book board 210R have a slanted edge that extends from the lower part to the upper part of the receiving side plate 214b.

[0060] As shown in Figure 11, the book boards 210L and 210R are formed as symmetrical plates, each approximately 220 mm high, 150 mm wide, and 3 mm thick. This increases the strength of the book boards 210L and 210R, allowing them to stably hold thick music books 22 upright.

[0061] As shown in Figure 11, the book boards 210L and 210R each have strip-shaped magnetic rubber 218, 218 attached to the upper part of their surfaces. This allows the sheet music 20 to be held between the magnetic rubber 218 and another magnet or a steel paperweight, thus allowing the sheet music 20 to be more stably propped up and held on the book boards 210L and 210R. Furthermore, as shown in Figure 9(c), when stored compactly, the magnetic rubber 218, 218 contact the left frame section 16d and the right frame section 16c, respectively, making them less likely to shift and preventing easy disassembly.

[0062] As shown in Figure 11, the lower surfaces of the reading boards 210L and 210R are formed with receiving sections 214, 214, respectively, for receiving the lower parts of the sheet music 20 and sheet music books 22. Each receiving section 214 consists of a receiving section bottom plate 214a and a receiving section side plate 214b erected in front of the upper surface of the receiving section bottom plate 214a, and is roughly L-shaped in side view.

[0063] As shown in Figure 11, the left-side support portion 214 has a slanted edge formed on the right side of the support portion side plate 214b, extending from the bottom to the top of the support portion side plate 214b. Similarly, the right-side support portion 214 has a slanted edge formed on the left side of the support portion side plate 214b, extending from the bottom to the top of the support portion side plate 214b. This allows the pages of the music book 22 to be turned while the music book 22 is propped up and held on the reading boards 210L and 210R.

[0064] Next, we will explain the procedure for turning the pages of the music book 22 while it is propped up and held on the reading boards 210L and 210R. Note that the explanation assumes the pages are turned from right to left.

[0065] First, the upper right portion of the right-hand page 22c is lifted diagonally upward to the left, causing the page 22c to bend and tilt its lower edge. Next, while maintaining the tilted lower edge of the page 22c, the page 22c is turned to the left (see Figure 12(a)). At this time, the lower edge of the page 22c passes over the slanted edge formed on the left side of the right-hand receiving side plate 214b. Next, the upper left portion of the page 22c that has been turned to the left is lifted diagonally upward to the right, causing the page 22c to bend and tilt its lower edge. Next, the lower edge of the page 22c passes over the slanted edge formed on the right side of the left-hand receiving side plate 214b (see Figure 12(b)). Finally, the page 222c is placed behind the receiving side plate 214b, maintaining the open state of the music book 22 (see Figure 12(c)).

[0066] This allows the sheet music book 22 to be propped up and held on the reading boards 210L and 210R while the pages 22c can be turned, eliminating the need to remove the sheet music book 22 from the reading boards 210L and 210R each time a page 22c is turned.

[0067] Although embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and any changes or additions that do not depart from the spirit of the present invention are also included.

[0068] For example, in the above embodiments 1 and 3, the two reading boards were described as being symmetrical, but the invention is not limited to this, and the two reading boards may be asymmetrical.

[0069] Furthermore, although the two reading boards in Examples 1 to 3 were described as being made of synthetic resin, other materials such as stainless steel may also be used.

[0070] Furthermore, in the above embodiments 1 to 3, the receiving portion was described as being composed of a receiving portion bottom plate that protrudes substantially horizontally from the surface side of the reading board and a receiving portion side plate erected in front of the upper surface of the receiving portion bottom plate, and having a substantially L-shape in side view. However, it is not limited to this, and for example, the receiving portion bottom plate and the receiving portion side plate may be formed continuously, resulting in a substantially U-shape in side view.

[0071] Furthermore, although the protrusions in Examples 1 to 3 were described as being integrally formed with the book stand, the invention is not limited to this, and separate protrusions may be attached to the book stand. For example, by attaching separate rubber protrusions to the book stand, it becomes less likely to scratch the surface of the table or other surface on which the book stand is placed when the book stand is slid.

[0072] Furthermore, although the latching portion was described in Examples 1 to 3 as protruding from the back side of the reading board, it is not limited to this and may protrude from the front side or both sides of the reading board. Also, the latching portion may be formed intermittently rather than continuously in the left-right direction.

[0073] Furthermore, although the above embodiment 2 was described as having openings provided so that a pattern can be formed on the two reading boards, the invention is not limited to this, and for example, drawings or coloring may be directly applied to the reading boards, or relief carvings may be applied. [Explanation of symbols]

[0074] 1 lectern 10L,10R Bookboard 10a Upper frame section 10b Lower frame section 10c Inner frame section 10d Outer frame section 10e Central frame section 10f opening 11 Latch part 12 Information Department 13 Protrusion 14 Receiving part 14a Receiving base plate 14b Receiving side plate 15 Pedestal 16 Base 16a Front frame section 16b Rear frame section 16c Right side frame section 16d Left side frame 16e Central frame section 16f opening 17 Rail section 17a Rail groove 20 Sheet Music 21 Music sheet 21a~21d Backing paper surface 21e~21g fold 22 sheet music books 22a Spine 22b,22c Paper

Claims

1. A bookstand comprising two book boards for holding books or documents upright, and a base for supporting the two book boards, wherein the base comprises a base portion and a rail portion having rail grooves extending in the left-right direction for supporting the lower part of the book boards so as to be slidable in the left-right direction, and the book boards are provided with projections at their lower ends that abut against the mounting surface on which the base is placed.

2. The book stand according to claim 1, characterized in that a protruding latching portion is provided on at least one of the back surface or front surface of the lower part of the book board, the cross-sectional shape of the rail groove is substantially the same as the cross-sectional shape of the lower part of the book board on which the latching portion is provided, and the lower part of the book board and the rail groove can be fitted together.

3. The book stand according to claim 2, characterized in that the lower parts of the two book boards facing each other are provided with vertical guides that do not have the aforementioned latching parts.

4. The book stand according to claim 3, characterized in that the surface of the book board is provided with a support portion at the bottom.

5. The book stand according to claim 1, characterized in that the two book plates are such that their opposing surfaces can come into contact with each other.

6. The book stand according to claim 4, characterized in that the receiving portion is composed of a receiving portion bottom plate and a receiving portion side plate extending upward at approximately a right angle from the front end of the receiving portion bottom plate, and the base portion can be housed in a space formed by bringing the back surface of the upper part of one book board into contact with the back surface of the receiving portion side plate provided on the other book board, and bringing the back surface of the upper part of the other book board into contact with the back surface of the receiving portion side plate provided on the one book board, when the surfaces of two book boards are facing each other with their top and bottom inverted, the base portion can be housed in a space formed within that space.

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