Canvas

Abstract

To provide a canvas using cardboard, which is lightweight, easy to manufacture, and suitable for mass production.SOLUTION: By folding inward an outer side part 4, a rear part 5, an inner side part 6, and a contact part 7, which are continuously connected to the left and right sides of a front part 3 of a main board 1 made of cardboard, left and right frame bodies 8, 8 are formed. Furthermore, by folding inward an outer side part 9, a rear part 10, an inner side part 11, and a contact part 12, which are continuously connected to upper and lower sides of the front part 3 of the main board 1, upper and lower frame bodies 13, 13 are formed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a canvas for painting.

Background Art

[0002] Conventionally, as a fabric stretching frame used as this type of canvas, as shown in FIG. 9, it is composed of a member 22 to be fastened for fastening the fabric 21 and a frame piece that covers at least a part of the member 22 to be fastened so as to be exposed to the outside. It is composed of an outer frame 23 and a connector 24 that connects these outer frames 23 to each other. There is a case where the fabric 21 is fastened using a fastening member 25 on one side surface that is the exposed portion of the member 22 to be fastened. (Patent Document 1).

[0003] The fabric stretching frame configured in this way is said to be easily assembled, reusable, and further have high strength.

[0004] Also, as this type of canvas, as shown in FIG. 10, it is composed of a sheet-shaped fabric 31 such as linen, cotton, synthetic fiber, or blended fabric, and a picture frame 32 for stretching the sheet-shaped fabric 31. There is a case where a base material is applied to the surface of the sheet-shaped fabric 31, a moisture-proof paint is applied to the surface 31a of this base material, and a moisture-proof paint is further applied to the back surface 31b of the sheet-shaped fabric 31. (Patent Document 2).

[0005] In the canvas configured in this way, by applying a moisture-proof paint to the back surface of the sheet-shaped fabric, the sheet-shaped fabric is not affected by the humidity in the atmosphere. Therefore, when painting an oil painting or an acrylic painting using a brush or a knife, the touch on the canvas is smooth, and in the painted painting, it is said that it can be stored without change over time.

[0006] Furthermore, as a canvas of this type, as shown in FIG. 11, it is composed of a sheet-like canvas fabric 41 such as linen, cotton, synthetic fiber, blended fabric, etc., and a wooden frame 42 for stretching the sheet-like canvas fabric 41. The end of the sheet-like canvas fabric 41 is turned to the back surface of the wooden frame 42 and fixed by stapling with canvas nails such as stapler 43. There is a tape 44 that covers the stapled stapler 43 and is adhered along the end of the sheet-like canvas fabric 41 turned around the back surface of the wooden frame 42 (Patent Document 3).

[0007] The canvas configured in this way is fixed by stapling the canvas to the back surface of the wooden frame, so that the side surface of the sheet-like canvas fabric can also be used as a painting surface for drawing pictures. When hung on a wall or the like, a three-dimensional feeling that is not flat can be experienced. Furthermore, by attaching a tape over the stapling on the back surface, not only does it make the appearance look nice, but it is also said that it is difficult to damage the wall when hanging it on the wall.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0009] However, in the fabric stretching frame used as the canvas described in Patent Document 1, the member to be fastened 22 and the outer frame 23 are made of wood. In the canvas described in Patent Document 2, the picture frame 32 is made of wood. Even in the canvas described in Patent Document 3, it is a wooden frame 42. Furthermore, since a fabric is attached to these frames, the weight of the canvas itself becomes large, and it is not easy to manufacture, not suitable for mass production, and cannot be provided at a low cost.

[0010] Therefore, the present invention is to solve the conventional problems, and an object of the present invention is to provide a canvas that uses cardboard to reduce weight, is easy to manufacture, and is suitable for mass production.

Means for Solving the Problems

[0011] In the canvas of the present invention, by bending the outer side surfaces 4, the back side surfaces 5, the inner side surfaces 6, and the contact surfaces 7 that are continuously provided on the left and right of the front surface portion 3 of the main body plate 1 made of cardboard inward, left and right frame bodies 8, 8 are formed. At the same time, by bending the outer side surfaces 9, the back side surfaces 10, the inner side surfaces 11, and the contact surfaces 12 that are continuously provided above and below the front surface portion 3 of the main body plate 1 inward, upper and lower frame bodies 13, 13 are formed.

[0012] And the canvas of the present invention is provided with a reinforcing plate 2 made of cardboard that is overlapped on the back surface of the front surface portion 3 and is sandwiched between the front surface portion 3 and the left and right upper and lower frame bodies 8, 8, 13, 13.

[0013] Furthermore, in the canvas of the present invention, reinforcing upper and lower frame bodies 13a, 13a formed by bending the reinforcing outer side surfaces 4a, the reinforcing back side surfaces 5a, the reinforcing inner side surfaces 6a, and the reinforcing contact surfaces 7a that are continuously provided above and below the outer side surfaces 4 of the left and right frame bodies 8, 8 inward are enclosed in the upper and lower frame bodies 13, 13.

Effects of the Invention

[0014] The canvas of the present invention can be produced simply by folding cardboard, so it is easy to produce, suitable for mass production, and can be provided at low cost.

[0015] In addition, since the canvas of the present invention can be provided at low cost, it is also suitable for use as a canvas for teaching materials or a practice canvas.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Modes for Carrying Out the Invention

[0017] Hereinafter, the modes for carrying out the canvas of the present invention will be described in detail with reference to the drawings.

[0018] The canvas of the present invention is composed of a main body plate 1 made of cardboard and a reinforcing plate 2.

[0019] Examples of the cardboard include corrugated paper, cardboard, and paperboard, and there are no particular limitations on the material and thickness. However, for painting, it is preferable to use a smoother one rather than a rough one on the surface, and it is preferable to use a cardboard with a thickness of about 1 to 2 mm for folding. Also, it is preferable to use the cardboard with a primer such as a moisture-proof paint on the surface so that the paint can spread easily.

[0020] As shown in FIG. 4, on the left and right of the front surface portion 3 of the main body plate 1, an outer surface portion 4, a back surface portion 5, an inner surface portion 6, and a contact surface portion 7 are connected in sequence via folding lines a, b, c, d. And on the top and bottom of the front surface portion 3, an outer surface portion 9, a back surface portion 10, an inner surface portion 11, and a contact surface portion 12 are connected in sequence via folding lines e, f, g, h. Then, the main body plate 1 forms left and right frames 8, 8 with a square cross-section by folding the outer surface portion 4, the back surface portion 5, the inner surface portion 6, and the contact surface portion 7 connected in sequence on the left and right of the front surface portion 3 by 90 degrees inward from the folding lines a, b, c, d respectively. At the same time, the main body plate 1 forms upper and lower frames 13, 13 with a square cross-section by folding the outer surface portion 9, the back surface portion 10, the inner surface portion 11, and the contact surface portion 12 connected in sequence on the top and bottom of the front surface portion 3 by 90 degrees inward from the folding lines e, f, g, h respectively. Note that an adhesive can be applied to the surfaces of the contact surface portions 7, 12 that contact the front surface portion 3 so that the contact surface portions 7, 12 can be adhered to the front surface portion 3.

[0021] The reinforcing plate 2 is used as necessary so that the front surface portion 3 does not deform such as warping. As shown in Fig. 3, it is formed in the same shape as the front surface portion 3 or a shape slightly smaller. Before bending the outer side surface portions 4, 9, the back surface portions 5, 10, the inner side surface portions 6, 11, and the contact surface portions 7, 12 respectively, it is overlapped on the back surface of the front surface portion 3 and is sandwiched between the front surface portion 3 and the left, right, upper, and lower frame bodies 8, 8, 13, 13. This reinforcing plate 2 is formed in the same shape as the front surface portion 3 or a shape slightly smaller, but the material may be the same as or different from that of the main body plate 1, and even if the surface has a rough feeling, it may be thicker or thinner than the front surface portion 3.

[0022] The size of the front surface portion 3 is not limited, but it is preferably set to a size corresponding to a general canvas size. In the illustrated example, it is about 297 mm × 210 mm, which is close to the size of F3. However, if it is a size of about 1 to 10 for various types, it is easy to assemble and is also preferable in terms of strength.

[0023] On the upper and lower sides of the outer side surface portion 4 of the left and right frame bodies 8, 8, reinforcing outer side surface portions 4a are continuously provided via fold lines i. On the left and right of each reinforcing outer side surface portion 4a, a reinforcing back surface portion 5a, a reinforcing inner side surface portion 6a, and a reinforcing contact surface portion 7a are continuously provided via fold lines j, k, l. Then, by bending the reinforcing outer side surface portions 4a, reinforcing back surface portions 5a, reinforcing inner side surface portions 6a, and reinforcing contact surface portions 7a continuously provided on the upper and lower sides of the outer side surface portion 4 of the left and right frame bodies 8, 8 inward by 90 degrees in order from the fold lines i, j, k, l, reinforcing upper and lower frame bodies 13a, 13a having a square cross-sectional shape are formed. After forming the reinforcing upper and lower frame bodies 13a, 13a, the upper and lower frame bodies 13, 13 are formed so as to enclose these reinforcing upper and lower frame bodies 13a, 13a.

[0024] At least one central portion of the back surface portion 5 of the left and right frame bodies 8, 8 is formed with a notch 14 for forming a suspension hole H. This suspension hole H is used when displaying a painting drawn on the front surface portion 3 on a wall with the front surface portion 3 in the horizontal direction. Further, the upper and lower ends of the back surface portion 5 are notched in a triangular shape, and the inner surface portions 6 and contact surface portions 7 are continuously provided from these notched ends E. Folding pieces 15, 15 are continuously provided above and below the inner surface portion 6 via fold lines m. These folding pieces 15, 15 close the gaps that can be formed between the left and right frame bodies 8, 8 and the upper and lower frame bodies 13, 13 when the left and right frame bodies 8, 8 and the upper and lower frame bodies 13, 13 are formed. Further, as will be described later, the folded outer surface portions 4, 9, back surface portions 5, 10, inner surface portions 6, 11, contact surface portions 7, 12 are prevented from returning to the original unfolded state, and are for maintaining the square cross-sectional shape of the left and right frame bodies 8, 8 and the upper and lower frame bodies 13, 13.

[0025] Furthermore, the width W1 of the outer surface portion 4 of the left and right frame bodies 8, 8 and the width W2 of the back surface portion 5 are made the same or substantially the same, and the width W3 of the inner surface portion 6 of the left and right frame bodies 8, 8 and the width W4 of the contact surface portion 7 are made the same or substantially the same. However, since the reinforcing plate 2 is sandwiched between the front surface portion 3 and the left and right frame bodies 8, 8, the width W3 of the inner surface portion 6 and the width W4 of the contact surface portion 7 are made smaller than the width W1 of the outer surface portion 4 and the width W2 of the back surface portion 5 by that amount. In the illustrated example, the width W1 and the width W2 are each about 30 to 31 mm, and the width W3 and the width W4 are each about 28 mm, but of course, it is not limited thereto.

[0026] At least one central portion of the back surface portion 10 of the upper and lower frame bodies 13, 13 is formed with a notch 16 for forming a suspension hole H. This suspension hole H is used when displaying a painting drawn on the front surface portion 3 on a wall with the front surface portion 3 in the vertical direction. Further, the left and right ends of the back surface portion 10 are notched in a triangular shape, and the inner surface portions 11 and contact surface portions 12 are continuously provided from these notched ends E.

[0027] Furthermore, the width W5 of the outer side surface 9 and the width W6 of the back surface 10 of the upper and lower frame bodies 13, 13 are the same or substantially the same, and the width W7 of the inner side surface 11 and the width W8 of the contact surface 12 of the upper and lower frame bodies 13, 13 are the same or substantially the same. However, since the reinforcing plate 2 is sandwiched between the front surface portion 3 and the upper and lower frame bodies 13, 13, the width W7 of the inner side surface 11 and the width W8 of the contact surface 12 are made smaller than the width W5 of the outer side surface 9 and the width W6 of the back surface 10 accordingly. In the illustrated example, the width W5 and the width W6 are each about 30 to 31 mm, and the width W7 and the width W8 are each about 28 mm, but of course, they are not limited thereto.

[0028] Also, the width W9 of the reinforcing outer side surface 4a, the width W 10 of the reinforcing back surface 5a, the width W 11 of the reinforcing inner side surface 6a, and the width W 12 of the reinforcing contact surface 7a of the reinforcing upper and lower frame bodies 13a, 13a are the same or substantially the same. And, as shown in the figure so that the reinforcing upper and lower frame bodies 13a, 13a are included in the upper and lower frame bodies 13, 13, the width W9, the width W 10 the width W 11 and the width W 12 are each about 25 mm, but of course, they are not limited thereto.

[0029] Note that, in the illustrated example, a gap S is formed between the outer side surface 9 of the upper and lower frame bodies 13, 13 and the reinforcing outer side surface 4a of the reinforcing upper and lower frame bodies 13a, 13a to facilitate bending the reinforcing upper and lower frame bodies 13a, 13a inward, but this gap S may not be provided.

[0030] The canvas of the present invention configured as described above is assembled as follows.

[0031] First, starting from the state shown in FIG. 3, the reinforcing plate 2 disposed above the back surface of the main body plate 1 is lowered and overlapped with the back surface of the front surface portion 3 of the main body plate 1.

[0032] Next, by bending the outer side faces 4, inner side faces 5, inner side faces 6, and contact faces 7 continuously provided on the left and right sides of the front face portion 3 inward by 90 degrees in order from the fold lines a, b, c, and d, left and right frame bodies 8, 8 as shown in FIG. 5 are formed.

[0033] Then, the folded-back pieces 15, 15 continuously provided on the inner side faces 6 of the left and right frame bodies 8, 8 are bent inward by 90 degrees from the fold line m, and the reinforcing outer side face 4a continuously provided on the left and right frame bodies 8, 8 is bent inward by 90 degrees from the fold line i. The reinforcing inner side face 5a, reinforcing inner side face 6a, and reinforcing contact face 7a continuously provided on this reinforcing outer side face 4a are bent inward by 90 degrees in order from the fold lines j, k, and l, respectively, to form reinforcing upper and lower frame bodies 13a, 13a as shown in FIG. 7.

[0034] Furthermore, from above the reinforcing upper and lower frame bodies 13a, 13a, the outer side faces 9, inner side faces 10, inner side faces 11, and contact faces 12 continuously provided above and below the front face portion 3 are bent inward by 90 degrees in order from the fold lines e, f, g, and h so as to enclose the reinforcing upper and lower frame bodies 13a, 13a, thereby forming upper and lower frame bodies 13, 13, resulting in an assembled state as shown in FIGS. 1 and 2.

[0035] In this state, the folded-back pieces 15, 15 continuously provided on the inner side faces 6 of the left and right frame bodies 8, 8 are sandwiched between the reinforcing inner side faces 6a of the reinforcing upper and lower frame bodies 13a, 13a and the inner side faces 11 of the upper and lower frame bodies 13, 13, and the inner side faces 6 of the left and right frame bodies 8, 8 remain in the state of being bent inward, so the square cross-sectional shape of the left and right frame bodies 8, 8 is maintained.

[0036] Furthermore, in the state where the folded-back pieces 15, 15 are sandwiched between the reinforcing inner side faces 6a and the inner side faces 11, the contact faces 12 of the upper and lower frame bodies 13, 13 are bent inward and remain sandwiched between the reinforcing contact faces 7a of the reinforcing upper and lower frame bodies 13a, 13a and the reinforcing plate 2, so the square cross-sectional shape of the upper and lower frame bodies 13, 13 is maintained.

[0037] Therefore, in this state, it is not necessary to apply an adhesive to the surfaces of the contact portions 7 of the left and right frame bodies 8, 8 and the contact portions 12 of the upper and lower frame bodies 13, 13 that come into contact with the reinforcing plate 2 respectively.

[0038] In the canvas of the present invention assembled in this way, since the reinforcing plate 2 is overlapped on the back surface of the front portion 3 of the main body plate 1, the front portion 3 has excellent strength and is less likely to warp.

[0039] Further, in the canvas of the present invention, since the reinforcing upper and lower frame bodies 13a, 13a are included in the upper and lower frame bodies 13, 13, the upper and lower frame bodies 13, 13 are strong and are not easily deformed even when a large number of them are stacked and stored or transported.

[0040] Therefore, as described above, the canvas of the present invention can be manufactured simply by folding cardboard, so it is easy to manufacture, suitable for mass production, and can be provided at low cost.

[0041] In addition, since the canvas of the present invention can be provided at low cost, it is also suitable for use as a canvas for teaching materials or a practice canvas.

Explanation of Signs

[0042] 1 Main body plate 2 Reinforcing plate 3 Front portion 4 Outer side face 4a Reinforced outer side face 5 Back face 5a Reinforced back face 6 Inner side face 6a Reinforced inner side face 7 Contact portion 7a Reinforced contact portion 8 Left and right frame bodies 9 Outer side face 10 Back face 11 Inner side face 12 Contact portion 13 Upper and lower frame bodies 13a Reinforced upper and lower frame bodies

Claims

1. By bending inward the outer side faces, inner side faces, contact faces, and back side faces that are continuously provided on the left and right of the front face of the main body plate made of cardboard, left and right frames are formed. At the same time, by bending inward the outer side faces, inner side faces, contact faces, and back side faces that are continuously provided above and below the front face of the main body plate, upper and lower frames are formed. A canvas characterized by this.

2. The canvas according to claim 1, further comprising a reinforcing plate made of cardboard that is superimposed on the back surface of the front face portion and is sandwiched between the front face portion and the left, right, upper, and lower frames.

3. The canvas according to claim 1 or 2, wherein a reinforced upper and lower frame formed by bending inward the reinforced outer side faces, reinforced inner side faces, reinforced contact faces, and reinforced back side faces that are continuously provided above and below the outer side faces of the left and right frames is encapsulated within the upper and lower frames.

Images