Device capable of automatically tightening canvas

Abstract

The utility model relates to the technical field of canvas fixing, and discloses a device capable of automatically tightening canvas, which comprises a table top, an air cylinder is fixedly connected to the bottom of the table top, a fixing plate is fixedly connected to the bottom end of the air cylinder, L-shaped plates are fixedly connected to four sides of the fixing plate respectively, and linkage plates are hinged to the interiors of the L-shaped plates. According to the device capable of automatically tightening the canvas, in the descending process, an L-shaped plate enables a linkage plate to drive a connecting supporting rod to move through a hinged relation, in the moving process, a bearing plate fixedly connected with the connecting supporting rod is in an inward sliding state, and on the contrary, an air cylinder contracts to be in an outward sliding state; and meanwhile, limiting blocks fixedly connected to the two sides of the bearing plate slide in limiting grooves in a limiting mode, then automatic rapid synchronous tightening operation can be achieved, rapid canvas tightening and flattening can be achieved in the whole operation process, the operation steps are simple and convenient to operate, the synchronous adjusting effect is good, and errors are small.

Description

Technical Field

[0001] This utility model relates to the field of canvas fixing technology, specifically a device that can automatically tighten a canvas. Background Technology

[0002] Canvas refers to the heavy woven fabric used for painting oil paintings. It is usually made of sturdy linen with a white undercoat for painting. This material does not absorb water or oil and is easy to color. It is a commonly used support material for oil and acrylic paintings. When painting, the canvas needs to be stretched taut on the canvas to ensure that the canvas is in a relatively flat state, so as to facilitate the artist's painting operations.

[0003] According to the canvas adsorption and tensioning device disclosed in CN220410184U, the solution includes a canvas board and tensioning grooves formed on the canvas board. Two bidirectional lead screws are rotatably connected in the two tensioning grooves facing each other. Two lead screw sliders are driven to the middle of the bidirectional lead screws. Canvas clamps are fixedly installed on the surface of the lead screw sliders. Gear motors are fixedly installed at both ends on one side of the canvas board. Support structures are fixedly installed on both sides of the bottom end of the canvas board. The canvas board includes a wooden base plate and a thin magnetic plate fixedly installed on the surface of the wooden base plate. A bottom storage box is fixedly installed at the bottom of the wooden base plate. Multiple pressing iron plates for adsorbing and tensioning the canvas are placed inside the bottom storage box. It can quickly clamp the four corners of the canvas and automatically complete the flattening and tensioning of the canvas. After tensioning, the magnetic attraction of the magnets is used to make the canvas stick tightly to the surface of the canvas board. It has the characteristics of simple operation, high flattening and tensioning efficiency, and high flatness after tensioning.

[0004] However, in actual operation, the inventors found that the following problems still exist: Although the above solution solves the problem of flattening and tightening the canvas, it requires multiple manual auxiliary operations to achieve flattening and tightening in actual operation. The overall operation process is cumbersome and inconvenient to use. Moreover, the operation method provided by the above solution takes about the same amount of time as manually flattening the canvas.

[0005] Based on this, the present invention provides a device that can automatically tighten a canvas. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a device that can automatically stretch a canvas, which has the advantage of automatically and synchronously adjusting for flatness, thus solving the problems mentioned in the background technology.

[0007] This utility model provides the following technical solution: a device for automatically tensioning a canvas, including a table, a cylinder fixedly connected to the bottom of the table, a fixed plate fixedly connected to the bottom end of the cylinder, L-shaped plates fixedly connected to the four sides of the fixed plate, a linkage plate hinged inside the L-shaped plate, a connecting rod hinged to the other end of the linkage plate, a bearing plate fixedly connected to the inner side of the connecting rod, a fixed bracket fixedly installed on the top of the bearing plate, an adjusting screw threaded inside the fixed bracket, and a circular pressure plate fixedly connected to the bottom of the adjusting screw.

[0008] Preferably, the top of the bearing plate is provided with a circular groove, and the interior of the circular groove is in contact with the circular pressure plate.

[0009] Preferably, the top of the bearing plate has a circular groove, and the interior of the circular groove is in contact with the circular lower pressure plate.

[0010] Preferably, a shielding shell is fixedly installed at the bottom of the tabletop, and auxiliary handles are fixedly installed around the perimeter of the shielding shell.

[0011] Preferably, a limiting groove is formed on both sides of the inner side of the slide groove, a limiting block is slidably connected inside the limiting groove, and a bearing plate is fixedly connected to the side of the limiting block.

[0012] Preferably, support legs are fixedly installed at the four corners of the lower surface of the shielding shell.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This automatic canvas tensioning device works by placing the canvas neatly within the cavities of four sets of fixed supports and adjusting the edges of the canvas to be flat. Then, by rotating an adjusting screw inside the fixed supports, a circular pressure plate is lowered, pressing down on the canvas. During this pressing process, the canvas is engaged within the circular pressure plate. A cylinder then extends the canvas, pushing a fixed plate and causing the surrounding L-shaped plates to descend together. During descent, the L-shaped plates, through hinges, cause a linkage plate to move the connecting rod. During this movement, the support plate, fixedly connected to the support rod, slides inward; conversely, the cylinder retracts, causing it to slide outward. Simultaneously, limiting blocks fixedly connected to both sides of the support plate slide within limiting grooves, thus achieving automatic, rapid, and synchronous tensioning. The entire operation ensures quick and even canvas tensioning, is simple to operate, easy to learn, and provides good synchronous adjustment with minimal error. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0016] Figure 2This utility model Figure 1 A schematic diagram of the structure viewed from below;

[0017] Figure 3 This utility model Figure 1 A partial structural diagram.

[0018] In the diagram: 1. Tabletop; 101. Slide groove; 102. Limiting groove; 103. Cylinder; 104. Fixing plate; 105. L-shaped plate; 106. Linkage plate; 107. Connecting support rod; 108. Bearing plate; 109. Limiting block; 110. Fixing bracket; 111. Adjusting screw; 112. Circular lower pressure plate; 2. Cover shell; 201. Auxiliary handle; 3. Support leg. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3A device for automatically tensioning a canvas includes a tabletop 1. A cylinder 103 is fixedly connected to the bottom of the tabletop 1. A fixing plate 104 is fixedly connected to the bottom end of the cylinder 103. L-shaped plates 105 are fixedly connected to the four sides of the fixing plate 104. A linkage plate 106 is hinged inside the L-shaped plate 105. A connecting rod 107 is hinged to the other end of the linkage plate 106. A bearing plate 108 is fixedly connected to the inner side of the connecting rod 107. A fixing bracket 110 is fixedly installed on the top of the bearing plate 108. An adjusting screw 111 is threadedly connected inside the fixing bracket 110. The bottom of the adjusting screw 111 is fixed... A circular pressure plate 112 is connected. By placing the canvas neatly inside the four sets of fixed supports 110 and adjusting the edges of the canvas to be flat, the circular pressure plate 112 is lowered and pressed down on the canvas by rotating the adjusting screw 111 inside the fixed support 110. During the pressing process, the canvas is also inserted into the circular pressure plate 112. Then, the canvas is extended by the cylinder 103. During the extension process, the cylinder 103 pushes the fixed plate 104, which in turn lowers the surrounding L-shaped plates 105. During the descent, the L-shaped plates 105, through the hinge connection, cause the linkage plate 106 to drive the connecting support rod 1. 07 moves, and during the movement, the support plate 108, which is fixedly connected to the support rod 107, slides inward; conversely, the cylinder 103 retracts and slides outward. Simultaneously, the limiting blocks 109 fixedly connected to both sides of the support plate 108 slide within the limiting groove 102, thus enabling automatic, rapid, and synchronous tensioning. The entire operation allows for rapid and even tensioning of the canvas, with simple and easy-to-use steps, good synchronous adjustment, and minimal error. A circular groove is provided on the top of the support plate 108, and the interior of the groove fits against the circular pressure plate 112. The table surface 1... Four sets of sliding grooves 101 are provided through the device. The inner walls of the four sets of sliding grooves 101 are fitted with bearing plates 108 on both sides. A shield shell 2 is fixedly installed at the bottom of the platform 1. Auxiliary handles 201 are fixedly installed around the shield shell 2. The device can be quickly moved through the auxiliary handles 201 around the shield shell 2, and it is also convenient for multiple people to move it together. Limiting grooves 102 are provided on both sides of the inner side of the sliding grooves 101. Limiting blocks 109 are slidably connected inside the limiting grooves 102. The bearing plates 108 are fixedly connected to the sides of the limiting blocks 109. Support legs 3 are fixedly installed at the four corners of the lower surface of the shield shell 2.

[0021] The working principle is as follows: the canvas is placed in the inner cavity of the four sets of fixed supports 110 and the edges of the canvas are adjusted to be flat. Then, the circular pressure plate 112 is lowered by the rotation of the adjusting screw 111 inside the fixed support 110, which presses down on the canvas. During the pressing process, the canvas is inserted into the circular pressure plate 112. Then, the cylinder 103 extends, and during the extension, the cylinder 103 pushes the fixed plate 104, which drives the surrounding L-shaped plates 105 to fall together. During the descent, the L-shaped plates 105 are hinged to the linkage plate 106, which drives the connecting rod 107 to move. During the movement, the bearing plate 108 fixedly connected to the connecting rod 107 slides inward. Conversely, the cylinder 103 retracts and slides outward. At the same time, the limiting blocks 109 fixedly connected to both sides of the bearing plate 108 slide within the limiting groove 102, thereby achieving automatic, rapid and synchronous tensioning.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for automatically tensioning a canvas, characterized in that, The system includes a tabletop (1), a cylinder (103) is fixedly connected to the bottom of the tabletop (1), a fixed plate (104) is fixedly connected to the bottom end of the cylinder (103), an L-shaped plate (105) is fixedly connected to the four sides of the fixed plate (104), a linkage plate (106) is hinged inside the L-shaped plate (105), a connecting rod (107) is hinged to the other end of the linkage plate (106), a bearing plate (108) is fixedly connected to the inner side of the connecting rod (107), a fixed bracket (110) is fixedly installed on the top of the bearing plate (108), an adjusting screw (111) is threaded inside the fixed bracket (110), and a circular pressure plate (112) is fixedly connected to the bottom of the adjusting screw (111).

2. The device for automatically tensioning a canvas according to claim 1, characterized in that: The top of the bearing plate (108) is provided with a circular groove, and the inside of the circular groove is in contact with the circular pressure plate (112).

3. The device for automatically tensioning a canvas according to claim 1, characterized in that: The tabletop (1) has four sets of sliding grooves (101) through it, and the two sides of the inner wall of the four sets of sliding grooves (101) are attached with bearing plates (108).

4. The device for automatically tensioning a canvas according to claim 1, characterized in that: A shielding shell (2) is fixedly installed at the bottom of the tabletop (1), and auxiliary handles (201) are fixedly installed around the shielding shell (2).

5. The device for automatically tensioning a canvas according to claim 3, characterized in that: Limiting grooves (102) are respectively opened on both sides of the inner side of the slide (101). A limiting block (109) is slidably connected inside the limiting groove (102). A bearing plate (108) is fixedly connected to the side of the limiting block (109).

6. The device for automatically tensioning a canvas according to claim 4, characterized in that: Support legs (3) are fixedly installed at the four corners of the lower surface of the shield (2).

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