Pneumatic cloth clamp for embroidery machine bed

Abstract

The utility model discloses a kind of embroidery machine platen's pneumatic cloth clamp, it is related to textile machinery technical field, including cloth clamp main part, inner support valve block and inflatable rubber ring, wherein cloth clamp main part buckling clamping on the horizontal positioning column of embroidery machine platen covered with cloth, the inner support valve block that this cloth clamp main part inner lifting resistance connection provides horizontal opening power for cloth clamp main part;Multiple inflatable rubber rings are sealingly and fixedly provided on the top surface of inner support valve block, the two side walls of inner support valve block integrally make and have positioning concave surface that is concave to the inside to open cloth clamp main part under non-gas supply condition and avoid cloth clamp main part rebound;The top of inflatable rubber ring is pneumatically supported on the top plane inner wall of cloth clamp main part, and inflatable rubber ring provides descending initial power for inner support valve block to further horizontally open cloth clamp main part. The pneumatic cloth clamp indirectly provides opening power for cloth clamp main part by adding inner support valve block with inflatable rubber ring, avoid the sharp metal edge of inflatable rubber ring contact cloth clamp main part, effectively improve the service life of inflatable rubber ring.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, specifically to a pneumatic fabric clamp for an embroidery machine table. Background Technology

[0002] During embroidery machine operation, the fabric needs to be smoothly fixed on the worktable. Traditional fixing methods mostly use mechanical or pneumatic clamps. Mechanical clamps have problems such as cumbersome operation, uneven clamping force, easy damage to the fabric, and low automation. Pneumatic clamps have problems such as airbag aging and leakage, direct contact between the airbag and the sharp edge of the clamp block causing the airbag to explode and fail, and uneven force due to a single airbag supporting the entire fabric clamp body. The airbag failure problem is particularly evident in the following published patents: Chinese patent CN219951408U discloses a modular automatic fabric clamp that is easy to manufacture, aiming to solve the problem of fabric clamping failure caused by leakage in the pipeline or bladder tube in the existing automatic fabric clamping mechanism; and to reduce the difficulty of fabric clamp manufacturing, making the modular automatic fabric clamp easy to manufacture. It includes: a fabric clamp, which includes two clamping arms and a connecting part connecting the two clamping arms; an airbag limiting member, which is manufactured separately from the fabric clamp, and the airbag limiting member is connected to at least one of the two clamping arms, the airbag limiting member is located between the two clamping arms, and an airbag mounting cavity is formed between the airbag limiting member and the connecting part; and an airbag, which is disposed in the airbag mounting cavity and is used to open the two clamping arms of the fabric clamp.

[0003] Chinese patent CN221778102U discloses a tenon-and-mortise sealed pneumatic clamp, aiming to provide a tenon-and-mortise sealed pneumatic clamp that can ensure the sealing of both ends of the airbag and effectively solve the problem that the openings at both ends of the airbag of the existing pneumatic cloth clamp are welded and sealed, which is prone to air leakage at the welded seal and affects the normal use of the pneumatic cloth clamp. It includes: a cloth clamp, including two clamping arms and a clamping port located between the two clamping arms; an airbag, located between the two clamping arms of the cloth clamp, opening the clamping port of the cloth clamp; the airbag includes an airbag cylinder with openings at both ends, and the two ends of the airbag cylinder are sealed by a tenon-and-mortise assembly, the tenon-and-mortise assembly including a locking sleeve and a tenon, wherein the locking sleeve is sleeved on the outside of the airbag cylinder, and the tenon is inserted into the airbag cylinder from the port of the airbag cylinder and extends into the locking sleeve, and the side wall of the airbag cylinder is pressed between the tenon and the locking sleeve.

[0004] Therefore, how to design a pneumatic fabric clamp for an embroidery machine table to prevent the airbag from directly contacting the sharp edge of the fabric clamp and exploding is a technical problem that urgently needs to be solved by those in the field. Summary of the Invention

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this utility model is to provide a pneumatic fabric clamp for an embroidery machine table. This pneumatic fabric clamp, by adding an internal support valve block, indirectly provides opening power to the fabric clamp body through an expansion rubber ring, avoiding contact between the expansion rubber ring and the sharp metal edge of the fabric clamp body, and effectively improving the service life of the expansion rubber ring.

[0006] Therefore, this utility model provides a pneumatic fabric clamp for an embroidery machine table, including a fabric clamp body, an inner support valve block, and expansion rubber rings. The fabric clamp body is fastened and held on a transverse positioning post on the embroidery machine table covered with fabric. The inner support valve block, which provides horizontal opening power to the fabric clamp body, is connected to the inner support valve block for lifting and lowering. Multiple expansion rubber rings are sealed and fixed on the top surface of the inner support valve block. The two side walls of the inner support valve block have integrally formed positioning concave surfaces that are recessed inward to open the fabric clamp body under non-pneumatic conditions and prevent the fabric clamp body from rebounding. The top of the expansion rubber rings is pneumatically supported on the inner wall of the top plane of the fabric clamp body. The expansion rubber rings provide the inner support valve block with initial downward power to horizontally open the fabric clamp body.

[0007] Preferably, the cross-section of the inner support valve block is an inverted triangular structure with the tip pointing downwards and the plane upwards. The bottom of the inner support valve block has a support portion integrally formed. Both sides of the support portion have horizontally concave positioning recesses, and the bottom surface of the support portion has a vertically concave support surface that cooperates with the horizontal positioning column to support it.

[0008] Preferably, the main body of the fabric clip is made of elastic metal material, and the middle part of the main body of the fabric clip has a horizontally concave support bend; the support bend is provided with opening power by the downward movement of the support part of the inner support valve block, and the opening angle of the support bend is provided by the positioning concave surface of the inner support valve block.

[0009] Preferably, the inner support valve block has an air passage connecting multiple expansion rubber rings inside, and each of the two side walls of the inner support valve block is fixedly connected to an air nozzle with one end connected to the air passage and the other end connected to an air source.

[0010] Preferably, air nozzles are fixed on both sides of the top surface of the inner support valve block. The air nozzles penetrate vertically through the main body of the fabric clamp, with one end of the air nozzle connected to the air passage and the other end connected to the air source.

[0011] Preferably, the top of the inner support valve block is provided with multiple mounting grooves for accommodating expansion rubber rings, and a pressure plate is fixed on the top surface of the inner support block to cooperate with the mounting grooves to press the edge of the expansion rubber rings; the mounting grooves are connected to the air passage.

[0012] The advantages of this utility model compared with the prior art are as follows: This invention achieves automated and rapid opening and stable clamping of fabric clamps through the ingenious combination of an expansion rubber ring drive and a mechanical self-locking structure. The expansion rubber ring indirectly provides the opening power to the fabric clamp body, avoiding contact between the expansion rubber ring and the sharp edges of the fabric clamp body, thus optimizing the working environment of the expansion rubber ring and improving its service life. The specific functional effects of the components are as follows: Fabric clamp body: Made of elastic metal, it utilizes the material's own elasticity to achieve automatic release and rebound closure of the clamping force, resulting in a simple and reliable structure. The centrally integrated support bend forms a precise force-bearing point, efficiently converting the vertically downward force transmitted from the inner support valve block into the horizontal opening movement of the fabric clamp body on both sides, resulting in high mechanical conversion efficiency and sensitive action.

[0013] The inner support valve block, as a core transmission and self-locking component, features an inverted triangular cross-section and two positioning concave surfaces that provide crucial mechanical self-locking functionality. When the expansion ring deflates, the fabric clamp body springs back under its own elasticity, and its inner wall engages with the positioning concave surfaces, locking the fabric clamp body at a fixed opening angle. This effectively prevents accidental closing and springback of the fabric clamp body, ensuring safety and convenience for operators during loading and unloading. Furthermore, it eliminates the need for prolonged air supply to the expansion ring, allowing the fabric clamp body to remain open for extended periods. The bottom support surface of the inner support valve block directly engages with the transverse positioning post of the platform, facilitating the installation of the pneumatic fabric clamp. When the fabric clamp body is manually pressed down, the inner support valve block moves upward, at which point the fabric clamp body is clamped and reset by its own elasticity.

[0014] Expansion rings: As a power source, their lifespan is significantly extended. Multiple expansion rings are arranged in series and simultaneously inflated and deflated via an air passage, providing a stable and uniform initial driving force for the downward movement of the inner support valve block. This avoids problems such as jamming or deformation of the fabric clamp body caused by uneven force at a single point. The expansion ring drive method has a gentle cushioning characteristic, effectively preventing impact damage to the fabric when clamping it, making it ideal for applications in the textile industry.

[0015] Air circuit and nozzles: The integrated air circuit within the internal support valve block connects multiple expansion rings, enabling single-point air source control of the overall operation. This simplifies the external piping layout and improves the overall sealing and reliability of the fabric clamp. The design of the nozzles located at both ends or the top provides flexible air source interface options, facilitating installation adaptation to the spatial structure of different embroidery machine models.

[0016] Mounting slot and pressure plate: The mounting slot on the top of the inner support valve block provides precise positioning and housing space for the expansion ring. The pressure plate, with fasteners, presses the edge of the expansion ring, ensuring that the expansion ring will not shift or twist during operation, while also enhancing the seal between the expansion ring and the inner support valve block, ensuring efficient transmission of pneumatic power.

[0017] In summary, the components of this utility model work together to achieve a high-performance clamping function that is automated, safe, stable, and does not damage the fabric, thus significantly improving the operating efficiency of the embroidery machine. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the working posture of this utility model on an embroidery machine; Figure 2 This is a comparison diagram of the posture changes of the main body of the fabric clamp in this utility model from clamping the horizontal positioning post to releasing the horizontal positioning post; Figure 3 This is a comparison diagram of the posture changes of the main body of the fabric clamp in this utility model from loosening the horizontal positioning post to clamping the horizontal positioning post; Figure 4 This is a three-dimensional structural diagram of the inner support valve block in this utility model (partially concealing the expansion rubber ring). Figure 5 This is a half-sectional view of the inner support valve block in this utility model (the air nozzle is set on both sides of the top of the inner valve block, and the expansion rubber ring is partially hidden). Figure 6 This is a half-sectional view of the inner support valve block in this utility model (the air nozzle is set at both ends of the inner valve block, and the expansion rubber ring is partially hidden). Figure 7 This is a side view of the main body of the fabric clip of this utility model; In the diagram: 1-Pneumatic fabric clamp; 2-Spring hinge; 3-Tensioning plate; 4-Tablet; 5-Electric cylinder; 6-Air nozzle; 7-Fabric clamp body; 8-Inner support valve block; 9-Horizontal positioning post; 10-Fabric; 11-Air passage; 12-Supporting surface; 13-Supporting bend; 14-Supporting part; 15-Positioning concave surface; 16-Expansion rubber ring; 17-Pressure plate; 18-Mounting groove; 19-Spring seam. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Combination Figures 1-5 This utility model provides a pneumatic fabric clamp 1 for an embroidery machine table, including a fabric clamp body 7, an inner support valve block 8, and expansion rubber rings 16. The fabric clamp body is fastened and held on a transverse positioning post 9 of the embroidery machine table 4 covered with fabric 10. The inner support valve block is connected to the fabric clamp body to provide horizontal opening power for the fabric clamp body. Multiple expansion rubber rings are sealed and fixed on the top surface of the inner support valve block. The two side walls of the inner support valve block are integrally formed with a back-to-back concave positioning concave surface 15 to open the fabric clamp body under non-pneumatic conditions and prevent the fabric clamp body from rebounding. The top of the expansion rubber ring is pneumatically supported on the inner wall of the top plane of the fabric clamp body. The expansion rubber ring provides the inner support valve block with the initial downward force to open the fabric clamp body horizontally.

[0024] Preferably, the cross-section of the inner support valve block is an inverted triangular structure with the tip pointing downward and the plane upward. The bottom of the inner support valve block has an integral support portion 14. Both sides of the support portion have horizontally concave positioning recesses, and the bottom surface of the support portion has a vertically concave support surface 12 that cooperates with the horizontal positioning column to support it.

[0025] Preferably, the main body of the fabric clip is made of elastic metal material, and a horizontally concave support bend 13 is integrally formed in the middle of the main body of the fabric clip; the support bend is provided with opening power by the downward movement of the support portion of the inner support valve block, and the opening angle of the support bend is positioned by the positioning concave surface of the inner support valve block.

[0026] Preferably, the inner support valve block has an air passage 11 that connects multiple expansion rubber rings inside, and each of the two side walls of the inner support valve block is fixedly connected to an air nozzle 6, one end of which is connected to the air passage and the other end of which is connected to an air source.

[0027] Preferably, air nozzles are fixed on both sides of the top surface of the inner support valve block. The air nozzles penetrate vertically through the main body of the fabric clamp, with one end of the air nozzle connected to the air passage and the other end connected to the air source.

[0028] Preferably, the top of the inner support valve block is provided with a plurality of mounting grooves 18 for accommodating expansion rubber rings, and a pressure plate 17 is fixed on the top surface of the inner support block to cooperate with the mounting grooves to press the edge of the expansion rubber rings; the mounting grooves are connected to the air passage.

[0029] In addition, such as Figure 7 As shown, the upper part of the fabric clip body has multiple through spring seams 19, which divide the upper plane of the fabric clip body into multiple non-connected deformation zones. Each deformation zone is fitted with 1-2 expansion rings.

[0030] In addition, the expansion ring of this utility model preferably adopts a mature product in the prior art.

[0031] To more clearly illustrate the specific implementation of this utility model, an embodiment is provided below: This utility model provides a pneumatic fabric clamp for an embroidery machine table, whose working posture is as follows: Figure 1 As shown, in actual work, an electric cylinder 5 also needs to be fixed on the platform. The electric cylinder provides horizontal tensioning power to the tensioning plate 3. The bottom surface of the tensioning plate is flush with the top surface of the platform 4, and the edge of the fabric is fixed on the tensioning plate.

[0032] The tensioning plate can be a mature product from existing technology. A transverse positioning post covering the fabric is fixed to the tensioning plate, and a spring hinge 2 is also fixed to the tensioning plate. The movable end of the spring hinge is fixedly connected to the top outer wall of the fabric clamp body. The spring hinge uses a mature product from existing technology, and a torsion spring is sleeved on the hinge's rotating shaft. This torsion spring provides torsional force to the spring hinge, so that the entire fabric clamp can move in a non-locked position. Figure 1 Rotate the device clockwise as shown to detach the entire fabric clamp from the horizontal positioning post; conversely, when locking the fabric clamp on the horizontal positioning post, simply rotate it clockwise as shown. Figure 3 Manually press the main body of the fabric clamp to fasten it onto the horizontal positioning post to clamp and fix the fabric.

[0033] The working principle of this utility model is as follows: 1. For example Figure 2 As shown, the release and mechanical self-locking process of the pneumatic fabric clamp (inflation transient): An external air source inflates the air passage and inner bladder through the air nozzle. The expansion ring expands, generating a downward thrust that pushes the entire inner support valve block downward inside the fabric clamp body. During the downward movement, the inclined surfaces on both sides of the supporting part of the inner support valve block push the supporting bending of the fabric clamp body, forcing the sides of the fabric clamp body, made of elastic metal, to overcome the elastic force and open horizontally outward. Then, the spring hinge drives the pneumatic fabric clamp to flip over and disengage from the lateral positioning post to release the fabric.

[0034] It is important to note that during the process of the pneumatic fabric clamp disengaging from the lateral positioning post, the expansion ring only needs to be inflated momentarily. Once the support bend of the fabric clamp body is engaged with the positioning concave surfaces on both sides of the inner support valve block, the expansion ring can be deflated. At this point, the fabric clamp body and the inner support valve block achieve mechanical self-locking to prevent the fabric clamp body from resetting. There is no need for the expansion ring to provide the inner support valve block with downward force within the fabric clamp body, and there is no need to supply air to the expansion ring for a long time to maintain the opening power of the fabric clamp body, as is the case with existing technologies. This effectively improves the service life of the expansion ring and reduces pneumatic energy consumption.

[0035] Additionally, it should be noted that the cross-section of the inner support valve block is an inverted triangular structure, and the width of its top plane is greater than the maximum spacing after the main body of the fabric clamp is bent and opened, in order to avoid the problem of excessive downward movement of the inner support valve block.

[0036] 2. For example Figure 3 As shown, the pneumatic fabric clamping process is as follows: The expansion ring is in a contracted state when not supplied with air. The clamp body attempts to spring back and close under its own elasticity, but is internally supported by the positioning concave surface of the inner support valve block. At this time, the entire pneumatic fabric clamp needs to be manually flipped and the elastic force of the spring hinge needs to be overcome to press the pneumatic fabric clamp onto the transverse positioning post covered with fabric. During this process, the transverse positioning post pushes upward against the supporting surface at the bottom of the inner support valve block, causing the inner support valve block to move upward inside the fabric clamp body until the supporting bends and disengages from the positioning concave surface to engage the mechanical self-locking mechanism. Then, the fabric clamp body closes, clamping and securing itself onto the transverse positioning post covered with fabric, thus achieving fabric clamping and positioning. Finally, the clamp is... Figure 1 The electric cylinder retracts to tension the fabric laid flat on the platform horizontally.

[0037] 3. This utility model replaces the single airbag in the prior art with multiple pneumatically expanded rubber rings inside the fabric clamp body to provide opening power for the fabric clamp body. The multiple expanded rubber rings are arranged in a straight line at intervals, and their combination provides the opening power for the fabric clamp body. Furthermore, unlike the single airbag in the prior art, the multiple expanded rubber rings do not require air supply to the airbag after the fabric clamp body opens to ensure that the fabric clamp body does not return to its original position. Thus, the multiple expanded rubber rings of this utility model only need to provide instantaneous expansion power when driving the fabric clamp body to open before deflating and retracting, thereby greatly improving the service life of the expanded rubber rings. Moreover, by creating multiple spring seams on the fabric clamp body, the integrity of the upper structure of the fabric clamp body is disrupted, increasing its elastic deformation and further preventing uneven deformation when the fabric clamp body opens or clamps.

[0038] Finally, any aspects of this utility model not fully described herein utilize existing mature products and technologies.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pneumatic fabric clamp for an embroidery machine table, characterized in that: The device includes a fabric clamp body, an inner support valve block, and expansion rings. The fabric clamp body is a long, strip-shaped clamping structure that is fastened and held onto a transverse positioning post on the embroidery machine table covered with fabric. The fabric clamp body is connected to an inner support valve block that provides horizontal opening power to the fabric clamp body. Multiple expansion rings are sealed and fixed on the top surface of the inner support valve block. The two side walls of the inner support valve block have integrally formed positioning concave surfaces that are not air-supplyed to open the fabric clamp body under non-air-supply conditions and prevent the fabric clamp body from rebounding. The top of the expansion rings is pneumatically supported on the inner wall of the top plane of the fabric clamp body. The expansion rings provide the inner support valve block with initial downward force, thereby horizontally opening the fabric clamp body.

2. The pneumatic fabric clamp for an embroidery machine table according to claim 1, characterized in that: The cross-section of the inner support valve block is an inverted triangular structure with the tip pointing downwards and the plane upwards. The bottom of the inner support valve block has a support portion integrally formed. Both sides of the support portion have horizontally concave positioning concave surfaces, and the bottom surface of the support portion has a vertically concave support surface that cooperates to support the transverse positioning column.

3. The pneumatic fabric clamp for an embroidery machine table according to claim 2, characterized in that: The main body of the fabric clip is made of elastic metal material, and a horizontally concave support bend is integrally formed in the middle of the main body of the fabric clip; the support bend is provided with opening power by the downward support part of the inner support valve block, and the opening angle of the support bend is provided by the positioning concave surface of the inner support valve block.

4. The pneumatic fabric clamp for an embroidery machine table according to claim 1, characterized in that: The inner support valve block has an air passage that connects multiple expansion rubber rings inside. Both ends of the inner support valve block are fixedly connected to an air nozzle with one end connected to the air passage and the other end connected to an air source.

5. The pneumatic fabric clamp for an embroidery machine table according to claim 1, characterized in that: Air nozzles are fixed on both sides of the top surface of the inner support valve block. The air nozzles penetrate vertically through the main body of the fabric clamp, with one end of the air nozzle connected to the air passage and the other end connected to the air source.

6. The pneumatic fabric clamp for an embroidery machine table according to claim 1, characterized in that: The top of the inner support valve block is provided with multiple mounting slots for accommodating expansion rubber rings, and a pressure plate is fixed on the top surface of the inner support block to cooperate with the mounting slots to press the edge of the expansion rubber rings; the mounting slots are connected to the air passage.

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