Tension-adjustable fixing and clamping device for canvas

Abstract

The utility model relates to the technical field of canvas clamping, in particular to a canvas tension-adjustable fixing and clamping device which comprises a picture frame, a canvas body is wrapped outside the picture frame, an adjusting block is arranged at the rear end of the picture frame, two clamping assemblies are arranged on the adjusting block, a sliding rail is fixedly arranged on the outer wall of the adjusting block, and the two clamping assemblies are arranged on the sliding rail. Two hanging assemblies are connected to the sliding rail in a sliding mode. The clamping assembly comprises first clamping blocks and second clamping blocks, the outer walls of the two first clamping blocks abut against the inner side wall of the painting frame, the outer wall of one second clamping block abuts against the outer wall of the canvas body, and a tension adjusting assembly is fixedly arranged on the other second clamping block. The tension uniformity of the canvas body is improved, the tension is conveniently adjusted in real time, the canvas body tension adjusting device adapts to canvas bodies of different materials and thicknesses, the circular shafts transmit the tension through friction force, non-linear conflicts between spring elasticity and canvas deformation are avoided, stress concentration is reduced, and the problems of edge stress concentration and center relaxation are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil painting canvas clamping technical field, especially a kind of fixed clamping device of oil painting canvas tension adjustable. BACKGROUND

[0002] In the process of oil painting creation and preservation, the tension control of canvas directly affects the display effect and durability of the work;

[0003] Through the compression of two groups of canvas clamping plates, the canvas clamping spring is compressed, so that the canvas is placed flat, the pressure on the canvas clamping plate is released, and the canvas clamping plate is reset under the elastic force of the canvas clamping spring to press the canvas and prevent the canvas from falling.

[0004] But in the use process, it is found that the tension adjustment of the device completely depends on the initial compression amount of the clamping spring, lacks a sustained adjustable mechanism, the linear recovery characteristics of the spring and the nonlinear deformation characteristics of the canvas are difficult to match, the edge stress concentration and the central relaxation problems are caused, the surface tension of the canvas is uneven, the pigment cracking or substrate deformation problem is caused, and the fixed clamping effect of the oil painting canvas is affected. SUMMARY

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of fixed clamping device of oil painting canvas tension adjustable, improve the tension uniformity of oil painting canvas body, it is convenient to adjust tension in real time, adapt to different material, thickness oil painting canvas body, circular shaft passes through friction force transmission tension, avoid the nonlinear conflict of spring elastic force and canvas deformation, reduce stress concentration, eliminate edge stress concentration and central relaxation problem.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: a kind of fixed clamping device of oil painting canvas tension adjustable, including picture frame, the picture frame outside is wrapped with oil painting canvas body, the picture frame rear end is equipped with adjusting block, two clamping components are equipped on the adjusting block, sliding rail is fixed on the outer wall of the adjusting block, two suspension components are connected on the sliding rail by sliding;The clamping component includes first clamping block and second clamping block, the outer wall of two first clamping blocks is respectively connected with the inner side wall of picture frame, the outer wall of one second clamping block is connected with the outer wall of oil painting canvas body, and the other second clamping block is fixed with tension adjusting assembly;

[0007] The tension adjusting assembly includes U-shaped block, the U-shaped block is installed on one of second clamping blocks, the U-shaped block is internally provided with circular shaft, the outer peripheral wall of the circular shaft is in frictional contact with the outer wall of oil painting canvas body, the middle part of the circular shaft is provided with a rotating shaft, the outer peripheral wall of the two ends of the rotating shaft is rotatably connected with the two ends of the U-shaped block, and one end of the rotating shaft is provided with a hand wheel.

[0008] Preferably, a ratchet wheel is sleeved on the outer circumferential wall of the rotating shaft, one of the recesses of the ratchet wheel is clamped with a pawl, the side of the pawl away from the ratchet wheel is rotationally connected with a pin shaft, and the pin shaft is fixed on the U-shaped block.

[0009] Preferably, a tension spring is fixed in the middle of the pawl, the other end of the tension spring is fixed with a connecting block, and the connecting block is fixed on the U-shaped block.

[0010] Through the above technical scheme, the pawl is rotationally connected with the U-shaped block through the pin shaft and is clamped into the recess of the ratchet wheel for fixation under the action of the tension spring.

[0011] Preferably, two slide rods are fixed on the second clamping block, the slide rods are slidingly connected with the first clamping block, two fasteners are rotationally connected with the outer wall of the first clamping block, and the second clamping block is threadedly connected with the fasteners through threaded holes.

[0012] Through the above technical scheme, the rotation of the fastener along the first clamping block pushes the second clamping block to approach the picture frame, so that one of the second clamping blocks clamps the oil painting canvas body outside the picture frame.

[0013] Preferably, a bidirectional screw rod is rotationally connected with the adjusting block, the middle parts of the two first clamping blocks are threadedly connected with the bidirectional screw rod through threaded holes, a limiting groove is formed in the second clamping block, and a gap is left between the bidirectional screw rod and the limiting groove.

[0014] Preferably, a T-shaped groove is formed in the adjusting block, the adjusting block is slidingly connected with the T-shaped groove through a T-shaped block, and one end of the bidirectional screw rod is fixed with a rotating rod.

[0015] Through the above technical scheme, the rotating rod is pushed to drive the bidirectional screw rod to rotate along the adjusting block, so that the distance between the two clamping assemblies is adjusted, and the T-shaped block is slidingly driven by the two first clamping blocks along the T-shaped groove.

[0016] Preferably, the hanging assembly comprises a hanging rod, the lower end of the hanging rod is slidingly connected with a slide rail, an insertion slot is formed in the hanging rod, an L-shaped insertion rod is inserted into the insertion slot, a fixing block is slidingly connected with the outer circumferential wall of the L-shaped insertion rod, and the side wall of the fixing block is fixedly connected with the outer wall of the hanging rod.

[0017] Through the above technical scheme, the hanging rod is pushed to slide along the slide rail to a suitable use position.

[0018] Preferably, a plurality of positioning grooves are formed in the slide rail, and one end of the hanging rod is clamped with the positioning grooves.

[0019] Preferably, a circular block is fixed on the L-shaped insertion rod, a spring is sleeved on the outer circumferential wall of the middle part of the L-shaped insertion rod, one end of the spring abuts against the circular block, and the other end of the spring abuts against the fixing block.

[0020] Through the spring restoring force, the circular block drives the L-shaped rod to be inserted into one of the positioning grooves, and the hanging rod is fixed.

[0021] The utility model discloses beneficial effect:

[0022] 1、 through one of the clamping components extruding and fixing the picture frame and the oil painting body edge on one side, and the circular shaft on the other clamping component rubs the oil painting body outer wall, respectively through two clamping components to fix the oil painting body, rotate hand wheel and make the rotating shaft rotate along the U-shaped block, drive the circular shaft to rotate, and the outer wall of the circular shaft rubs the oil painting body, and the oil painting body edge is moved through the friction force, the tension state of the oil painting body on the picture frame is changed, the tension adjustment is realized, the tension uniformity of the oil painting body is improved, the tension is adjusted in real time conveniently, different material, thickness oil painting body is adapted, the circular shaft passes through the friction force transmission tension, avoids the nonlinear conflict of spring elasticity and canvas deformation, reduces stress concentration, and the edge stress concentration and central relaxation problem are eliminated.

[0023] 2、 the ratchet sleeve is connected with the rotating shaft, and rotates synchronously with the rotating shaft, the pawl is rotatably connected with the U-shaped block through the pin shaft, and is clamped into the recess of the ratchet wheel for fixation under the action of the tension spring; when the hand wheel is rotated clockwise, the ratchet wheel drives the pawl to swing clockwise, drives the rotating shaft to rotate, when rotating counterclockwise, the pawl clamps the ratchet wheel, prevents the rotating shaft from reversing, ensures that the tension is stable after the hand wheel is adjusted, and avoids reverse rotation caused by vibration or external force.

[0024] 3、 push the rotating rod to drive the bidirectional screw rod to rotate along the adjusting block, adjust the distance between the two clamping components, make the two first clamping blocks drive the T-shaped block to slide along the T-shaped groove, make the outer wall of the two first clamping blocks abut against the inner wall of the picture frame, then rotate the fastener along the first clamping block to push the second clamping block to the picture frame, make one of the second clamping blocks clamp the oil painting body outside the picture frame, and the other second clamping block drives the circular shaft to abut against the oil painting body outside the picture frame, complete the preliminary clamping of the oil painting body, adjust the tension through the tension adjusting assembly, improve the adjustment efficiency and stability, and ensure the overall flatness of the oil painting body.

[0025] 4、 according to different sizes of oil painting body, select the picture frame of appropriate size for use, respectively adjust two hanging components to adapt to the use of different sizes of oil painting body, when moving the hanging rod, pull the L-shaped rod upwards along the fixed block to make the L-shaped rod separate from the positioning groove, at this time, the L-shaped rod drives the circular block to slide upwards, and the spring is compressed, the hanging rod is pushed to slide along the sliding rail to the appropriate use position; then release the L-shaped rod, the circular block drives the L-shaped rod to be inserted into one of the positioning grooves inside through the restoring force of the spring, and the hanging rod is fixed, which is convenient for the hanging or painting use of the picture frame and the oil painting body. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the whole structure schematic diagram of the utility model;

[0027] Figure 2 It is the whole structure back perspective view of the utility model;

[0028] Figure 3 It is the adjusting block structure schematic diagram of the utility model;

[0029] Figure 4 It is the second clamping block structure schematic diagram of the utility model;

[0030] Figure 5 It is the U-shaped block structure schematic diagram of the utility model;

[0031] Figure 6 It is the round shaft structure bottom perspective view of the utility model;

[0032] Figure 7 It is the suspension assembly structure schematic diagram of the utility model.

[0033] In the figure: 100, picture frame;200, oil painting cloth body;300, adjusting block;301, bidirectional screw;302, T-shaped slot;303, T-shaped block;304, rotating rod;400, clamping assembly;401, first clamping block;402, second clamping block;403, limiting slot;404, sliding rod;405, fastener;500, sliding rail;501, positioning slot;600, suspension assembly;601, hanging rod;602, insertion slot;603, L-shaped insertion rod;604, fixed block;605, round block;606, spring;700, tension adjusting assembly;701, U-shaped block;702, round shaft;703, rotating shaft;704, hand wheel;705, ratchet wheel;706, pawl;707, pin shaft;708, tension spring;709, connecting block. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is described in detail below with the help of the drawings in the specification. Example one

[0035] As Figures 1-6As shown, the embodiment provides an oil painting canvas tension-adjustable fixing and clamping device, which comprises a picture frame 100, the picture frame 100 is wrapped outside by an oil painting canvas body 200, the picture frame 100 rear end is provided with an adjusting block 300, the adjusting block 300 is provided with two clamping assemblies 400, the adjusting block 300 outer wall is fixedly provided with a sliding rail 500, the sliding rail 500 is slidingly connected with two hanging assemblies 600; the clamping assembly 400 comprises a first clamping block 401 and a second clamping block 402, the two first clamping blocks 401 outer walls are respectively abutted with the picture frame 100 inner side walls, one of the second clamping blocks 402 outer walls is abutted with the oil painting canvas body 200 outer wall, and the other second clamping block 402 is fixedly provided with a tension adjusting assembly 700.

[0036] The tension adjusting assembly 700 comprises a U-shaped block 701, the U-shaped block 701 is installed on one of the second clamping blocks 402, the U-shaped block 701 is internally provided with a circular shaft 702, the circular shaft 702 outer peripheral wall is frictionally contacted with the oil painting canvas body 200 outer wall, the circular shaft 702 middle part is sleeved with a rotating shaft 703, the rotating shaft 703 two ends outer peripheral walls are respectively rotationally connected with the U-shaped block 701 two ends, one end of the rotating shaft 703 is sleeved with a hand wheel 704.

[0037] The rotating shaft 703 outer peripheral wall is sleeved with a ratchet wheel 705, one of the recesses of the ratchet wheel 705 is clamped with a pawl 706, the pawl 706 side away from the ratchet wheel 705 is rotationally connected with a pin shaft 707, the pin shaft 707 is fixedly arranged on the U-shaped block 701, the pawl 706 middle part is fixedly arranged with a tension spring 708, the other end of the tension spring 708 is fixedly arranged with a connecting block 709, the connecting block 709 is fixedly arranged on the U-shaped block 701; the pawl 706 is rotationally connected with the U-shaped block 701 through the pin shaft 707, and is clamped into the recess of the ratchet wheel 705 for fixation under the action of the tension spring 708.

[0038] The second clamping block 402 is fixedly provided with two sliding rods 404, the sliding rods 404 are slidingly connected with the first clamping blocks 401, the first clamping block 401 outer wall is rotationally connected with two fasteners 405, the second clamping block 402 is threadedly connected with the fasteners 405 through the threaded holes; rotating the fastener 405 along the first clamping block 401 to push the second clamping block 402 to approach the picture frame 100, so that one of the second clamping blocks 402 clamps the oil painting canvas body 200 outside the picture frame 100.

[0039] The bidirectional screw rod 301 is rotationally connected to the adjusting block 300, the two first clamping blocks 401 are respectively threadedly connected to the bidirectional screw rod 301 through threaded holes, the second clamping block 402 is provided with a limiting groove 403, and a gap is left between the bidirectional screw rod 301 and the limiting groove 403; the adjusting block 300 is provided with a T-shaped groove 302, the adjusting block 300 is slidably connected to the T-shaped groove 302 through a T-shaped block 303, and one end of the bidirectional screw rod 301 is fixedly provided with a rotating rod 304; the rotating rod 304 is pushed to drive the bidirectional screw rod 301 to rotate along the adjusting block 300, the distance between the two clamping assemblies 400 is adjusted, and the two first clamping blocks 401 drive the T-shaped block 303 to slide along the T-shaped groove 302.

[0040] Working principle: first, the oil painting canvas body 200 is wrapped outside the picture frame 100, then one of the clamping assemblies 400 is used to extrude and fix the picture frame 100 and the edge of the oil painting canvas body 200 on one side, while the other clamping assembly 400 is used to fix the oil painting canvas body 200 through friction between the circular shaft 702 and the outer wall of the oil painting canvas body 200.

[0041] The rotating handle 704 drives the rotating shaft 703 to rotate along the U-shaped block 701, and drives the circular shaft 702 to rotate, so that the outer circumferential wall of the circular shaft 702 is in frictional contact with the oil painting canvas body 200, the edge of the oil painting canvas body 200 is pushed to move through frictional force, the stretching state of the oil painting canvas body 200 on the picture frame 100 is changed, tension adjustment is realized, the uniformity of the tension of the oil painting canvas body 200 is improved, the tension is conveniently adjusted in real time, different materials and thicknesses of the oil painting canvas body 200 are adapted to, the circular shaft 702 transmits tension through frictional force, nonlinear conflict between spring elastic force and canvas deformation is avoided, stress concentration is reduced, and the problems of edge stress concentration and central relaxation are eliminated.

[0042] The ratchet wheel 705 is sleeved on the rotating shaft 703 and rotates synchronously with the rotating shaft 703, the pawl 706 is rotationally connected to the U-shaped block 701 through the pin shaft 707 and is clamped into the recess of the ratchet wheel 705 to be fixed under the action of the tension of the tension spring 708; when the rotating handle 704 is rotated clockwise, the ratchet wheel 705 drives the pawl 706 to swing clockwise, and drives the rotating shaft 703 to rotate; when the rotating handle 704 is rotated counterclockwise, the pawl 706 clamps the ratchet wheel 705, preventing the rotating shaft 703 from being reversed, ensuring that the tension is stable after the rotating handle 704 is adjusted, and avoiding reverse rotation caused by vibration or external force.

[0043] When the clamping assembly 400 is installed, the rotating lever 304 is pushed to drive the bidirectional screw rod 301 to rotate along the adjusting block 300, the distance between the two clamping assemblies 400 is adjusted, the two first clamping blocks 401 drive the T-shaped block 303 to slide along the T-shaped groove 302, the outer wall of the two first clamping blocks 401 abuts against the inner wall of the picture frame 100, then the fastener 405 is rotated to push the second clamping block 402 to approach the picture frame 100 along the first clamping block 401, one of the second clamping blocks 402 clamps the oil painting canvas body 200 outside the picture frame 100, and the other second clamping block 402 drives the circular shaft 702 to abut against the oil painting canvas body 200 outside the picture frame 100, the preliminary clamping of the oil painting canvas body 200 is completed, and the tension is adjusted through the tension adjusting assembly 700, so that the adjusting efficiency and stability are improved, and the overall flatness of the oil painting canvas body 200 is ensured.

[0044] Embodiment two

[0045] As shown in Figure 1 , Figure 2 , Figure 3 , and Figure 7 , on the basis of embodiment one, the hanging assembly 600 comprises a hanging rod 601, the lower end of the hanging rod 601 is in sliding connection with the sliding rail 500, the hanging rod 601 is provided with an insertion slot 602 on the upper end, the hanging rod 601 is inserted with an L-shaped insertion rod 603 through the insertion slot 602, the outer circumferential wall of the L-shaped insertion rod 603 is in sliding connection with a fixing block 604, and the side wall of the fixing block 604 is fixedly connected with the outer wall of the hanging rod 601; the hanging rod 601 is pushed to slide along the sliding rail 500 to a suitable use position.

[0046] A plurality of positioning grooves 501 are formed on the sliding rail 500, one end of the hanging rod 601 is in clamping connection with the positioning groove 501, a circular block 605 is fixedly arranged on the L-shaped insertion rod 603, a spring 606 is sleeved on the outer circumferential wall of the middle part of the L-shaped insertion rod 603, one end of the spring 606 abuts against the circular block 605, and the other end of the spring 606 abuts against the fixing block 604; the circular block 605 is pushed to drive the L-shaped insertion rod 603 to be inserted into one of the positioning grooves 501 through the restoring force of the spring 606, and the hanging rod 601 is fixed.

[0047] In use, suitable sizes of the picture frame 100 are selected according to different sizes of the oil painting canvas body 200 for use, the two hanging assemblies 600 are adjusted respectively to adapt to the use of the oil painting canvas body 200 of different sizes, when the hanging rod 601 is moved, the L-shaped insertion rod 603 is pulled upward to slide along the fixing block 604, the L-shaped insertion rod 603 is separated from the positioning groove 501, at this time the L-shaped insertion rod 603 drives the circular block 605 to slide upward, the spring 606 is compressed, and the hanging rod 601 is pushed to slide along the sliding rail 500 to a suitable use position.

[0048] Then, the L-shaped inserting rod 603 is loosened, the round block 605 is pushed by the restoring force of the spring 606 to drive the L-shaped inserting rod 603 to be inserted into one of the positioning grooves 501, the hanging rod 601 is fixed, and the hanging or painting use of the picture frame 100 and the oil painting cloth body 200 is facilitated.

[0049] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An adjustable tension fixing device for oil painting canvas, comprising a picture frame (100), the picture frame (100) is wrapped with an oil painting canvas body (200), the rear end of the picture frame (100) is provided with an adjusting block (300), and two clamping assemblies (400) are arranged on the adjusting block (300), characterized in that: The outer wall of the adjusting block (300) is fixed with a sliding rail (500), and two hanging assemblies (600) are slidably connected to the sliding rail (500); the clamping assembly (400) comprises first clamping blocks (401) and second clamping blocks (402), the outer walls of the two first clamping blocks (401) are respectively abutted against the inner side walls of the picture frame (100), and the outer wall of one of the second clamping blocks (402) is abutted against the outer wall of the oil painting canvas body (200), and the outer wall of the other second clamping block (402) is fixed with a tension adjusting assembly (700); The tension adjusting assembly (700) comprises a U-shaped block (701), the U-shaped block (701) is installed on one of the second clamping blocks (402), the U-shaped block (701) is internally provided with a circular shaft (702), the outer peripheral wall of the circular shaft (702) is in frictional contact with the outer wall of the oil painting canvas body (200), the middle part of the circular shaft (702) is sleeved with a rotating shaft (703), the outer peripheral walls of the two ends of the rotating shaft (703) are respectively rotatably connected with the two ends of the U-shaped block (701), and one end of the rotating shaft (703) is sleeved with a hand wheel (704).

2. The adjustable tension easel of claim 1, wherein: The outer peripheral wall of the rotating shaft (703) is sleeved with a ratchet wheel (705), one of the recesses on the ratchet wheel (705) is clamped with a ratchet pawl (706), the side, away from the ratchet wheel (705), of the ratchet pawl (706) is rotatably connected with a pin shaft (707), and the pin shaft (707) is fixed on the U-shaped block (701).

3. The adjustable tension easel of claim 2, wherein: The middle part of the ratchet pawl (706) is fixed with a tension spring (708), the other end of the tension spring (708) is fixed with a connecting block (709), and the connecting block (709) is fixed on the U-shaped block (701).

4. The adjustable tension easel of claim 3, wherein: Two sliding rods (404) are fixed on the second clamping block (402), the sliding rods (404) are slidably connected with the first clamping blocks (401), the outer walls of the first clamping blocks (401) are rotatably connected with two fasteners (405), and the second clamping block (402) is threadedly connected with the fasteners (405) through threaded holes.

5. The adjustable tension easel of claim 4, wherein: A bidirectional screw rod (301) is rotatably connected to the adjusting block (300), the middle parts of the two first clamping blocks (401) are respectively threadedly connected with the bidirectional screw rod (301) through threaded holes, and a limiting groove (403) is formed in the second clamping block (402), and a gap is left between the bidirectional screw rod (301) and the limiting groove (403).

6. The adjustable tension easel of claim 5, wherein: A T-shaped groove (302) is formed in the adjusting block (300), the adjusting block (300) is slidably connected with the T-shaped groove (302) through a T-shaped block (303), and one end of the bidirectional screw rod (301) is fixed with a rotating rod (304).

7. The adjustable tension easel of claim 1, wherein: The hanging assembly (600) comprises a hanging rod (601), the lower end of the hanging rod (601) is slidably connected with the slide rail (500), a slot (602) is formed in the upper end of the hanging rod (601), an L-shaped inserting rod (603) is inserted into the slot (602), a fixing block (604) is slidably connected with the outer circumferential wall of the L-shaped inserting rod (603), and the side wall of the fixing block (604) is fixedly connected with the outer wall of the hanging rod (601).

8. The adjustable tension easel of claim 7, wherein: A plurality of positioning grooves (501) are formed in the slide rail (500), and one end of the hanging rod (601) is clamped and matched with the positioning grooves (501).

9. The adjustable tensioning device for oil painting canvas according to claim 8, characterized in that: A circular block (605) is fixedly arranged on the L-shaped inserting rod (603), a spring (606) is sleeved on the outer circumferential wall of the middle portion of the L-shaped inserting rod (603), one end of the spring (606) abuts against the circular block (605), and the other end of the spring (606) abuts against the fixing block (604).

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