Non-contact flaky material picking device

Abstract

The invention provides a non-contact flaky material picking device which is characterized in that a negative pressure cavity is formed among a cylinder barrel, a piston and a piston rod, a hollow cavity is formed in the piston rod, a communicating hole for communicating the hollow cavity with the negative pressure cavity is formed in the piston rod, and an adsorption hole for communicating the hollow cavity is formed in a picking head. The positive pressure module is connected to the periphery of the pickup head, a positive pressure cavity is formed in the positive pressure module, and a blowing hole communicating with the positive pressure cavity is formed in the pickup head. The adsorption holes and the air blowing holes work at the same time, the adsorption holes can generate adsorption force on the flaky materials, the air blowing holes generate negative pressure towards high-speed airflow blown out of gaps between the positive pressure module and the flaky materials, the flaky materials can be adsorbed, the airflow of the air blowing holes can flow to the laminated breathable flaky materials, the vacuum space generated by flaky material separation can be filled, and the separation efficiency of the flaky materials is improved. The adsorption of the adsorption holes to the lower-layer sheet-shaped materials can be reduced, the adsorption holes and the blowing holes are matched to well pick up single breathable sheet-shaped materials, picking up of multiple sheet-shaped materials is avoided, and the efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of sheet material picking devices, and in particular to a non-contact sheet material picking device. Background Art

[0002] Currently, many industries are gradually beginning to use automated production equipment, and many automated production equipment have devices for picking up materials. Some sheet materials contain sheet materials. During the automated production process, a picking device is used to pick up a single sheet material from the stacked sheet materials and transfer it to the processing station. When the sheet material picking device in the prior art picks up the stacked sheet materials, due to the electrostatic adsorption between the sheet materials or the instantaneous vacuum space between the stacked sheet materials during separation, it is easy for the target sheet material to be picked up and adsorbed with the lower layer of sheet material, resulting in the problem of multiple sheet materials being picked up at the same time. This is especially true for breathable sheet materials, as it is more likely to pick up multiple sheet materials, which greatly affects production efficiency.

[0003] Therefore, it is necessary to provide a non-contact sheet material picking device to solve the above technical problems. Summary of the Invention

[0004] The present invention provides a non-contact sheet material picking device to solve the problem that the sheet material picking device in the prior art is prone to carry away multiple sheet materials when picking up stacked sheet materials, thereby affecting efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a non-contact sheet material picking device, which includes: a cylinder, a piston rod, a piston, a return spring, a picking head, and a positive pressure module; The cam is provided with a plurality of sealing rings, each of which is connected to the inner wall of the cylinder and has a plurality of sealing rings connected to the outer wall of the cylinder. The sealing rings are connected to the outer wall of the cylinder and the outer wall of the piston rod. The sealing rings are connected to the inner wall of the cylinder and the inner wall of the piston rod. The positive pressure module is connected to the outer periphery of the picking head, a positive pressure chamber is provided in the positive pressure module, a positive pressure interface which passes through the positive pressure chamber is provided on the outer wall of the positive pressure module, and an air blowing hole which connects the positive pressure chamber and the external space is provided on the picking head, and the air blowing hole blows air toward the gap between the positive pressure module and the sheet material to generate negative pressure so as to adsorb the sheet material.

[0006] In the present invention, a sink is provided on the side of the positive pressure module away from the cylinder, the circumferential side wall of the sink is an inclined guide surface, the outer end edge of the guide surface is farther away from the picking head than the inner end edge, and a plurality of blowing holes are provided on the circumferential side of the picking head, and the blowing holes blow air toward the guide surface.

[0007] In which, the positive pressure chamber is formed between the positive pressure module and the picking head, and a ring body portion is provided on the circumferential side of one end of the picking head away from the piston rod, and a groove connected to the positive pressure chamber is provided on the ring body portion close to the side of the piston rod, and the blowing hole is provided on the ring body portion, and the blowing hole is connected to the groove.

[0008] In addition, the end surface of the pickup head is located in the sink, and the end surface of the pickup head is at a set distance from the end surface of the positive pressure module.

[0009] In the present invention, the cylinder comprises a main cylinder body, a rear end cover, a retaining ring, and a buffer pad; The main cylinder is provided with a mounting opening at one end away from the pickup head, a mounting groove is provided on the side wall of the mounting opening, a clamping groove is provided on the inner wall of the mounting groove, the rear end cover is provided in the mounting groove, a first sealing ring is provided between the rear end cover and the inner wall of the mounting groove, the buffer pad is provided on a side of the rear end cover close to the piston, the retaining ring is connected in the clamping groove, and the retaining ring fixes and restricts the rear end cover in the mounting groove.

[0010] In which, the cylinder also includes a front end cover, which is a cylindrical structure. The front end cover is connected to the end of the main cylinder away from the rear end cover. A second sealing ring is arranged between the front end cover and the main cylinder. The negative pressure interface is arranged on the outer wall of the front end cover. The negative pressure interface and the positive pressure interface are facing the same side, and the piston rod is slidably sleeved in the front end cover.

[0011] In the present invention, the non-contact sheet material picking device further includes a ring member, a deceleration spring, and a magnet block. The ring member is slidably disposed in the main cylinder and sleeved on the outer circumference of the piston rod. The deceleration spring is connected between the ring member and the front end cover. The magnet block is disposed on a side of the ring member close to the piston. When the pickup head absorbs the sheet material, the magnet block is in adsorption contact with the piston. When the pickup head picks up the sheet material and moves a set distance, the magnet block is separated from the piston. Furthermore, a side portion of the ring body part close to the front end cover is connected to a limit rod extending axially along the ring body part, a limit groove is axially provided on the inner wall surface of the main cylinder body, and one end of the limit rod is provided with a limit block slidingly engaged with the limit groove. When the deceleration spring is in a natural state, the limit block is at a set distance from the end face of the limit groove close to the piston. When the limit block contacts the end face of the limit groove close to the piston, the magnet block is separated from the piston.

[0012] In the present invention, the pickup head and the piston rod are a detachable fixed plug-in structure, a positioning groove is provided in the sink to cooperate with the ring body, and the positive pressure module is limited between the ring body and the end face of the piston rod.

[0013] Optionally, the pickup head and the piston rod may also be an integrally formed structure.

[0014] In the present invention, the pickup head is threadedly connected to the piston rod, a positioning groove is provided in the sink groove for positioning with the ring body, and an annular spring is provided between the ring body and the inner bottom surface of the positioning groove. When the pickup head and the piston rod are at different threaded depths, the blowing hole and the side wall of the positioning groove have different degrees of intersection area; A resilient rubber block is detachably provided on the ring body, a receiving groove for interference-fitting the rubber block is provided on the ring body, an air guide hole is provided on the rubber block, the center of the air guide hole and the center of the rubber block are offset in the axial direction of the pickup head, a long through hole connected to the positive pressure chamber is provided in the receiving groove, and when the rubber block is installed in the receiving groove in different orientations, the air guide holes are connected to the long through hole to form the blowing hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the non-contact sheet material picking device of the present invention provides an adsorption hole and an air blowing hole on the picking head. When the adsorption hole and the air blowing hole are working simultaneously, the adsorption hole can generate an adsorption force on the sheet material. At the same time, the high-speed airflow blown out by the air blowing hole into the gap between the positive pressure module and the sheet material can generate negative pressure, which can adsorb the sheet material. The airflow from the air blowing hole will flow to the laminated breathable sheet material, which can quickly fill the instantaneous vacuum space generated by the separation of the sheet material and reduce the adsorption of the lower layer of sheet material by the adsorption hole. The adsorption hole and the air blowing hole cooperate to well pick up a single breathable sheet material, avoiding picking up multiple sheets of sheet material, and having high efficiency. When only the adsorption hole is working, it can be used to pick up non-breathable sheet materials, with high adsorption compatibility and diverse functions.

[0016] On the other hand, the position where part of the airflow from the blowing hole blows toward the sheet material is different from the position where the adsorption hole adsorbs the sheet material. In this way, the blowing of the air through the blowing hole toward the sheet material is unlikely to have a significant impact on the adsorption of the sheet material by the adsorption hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0018] Figure 1 Schematic diagram of the structure of the first embodiment of the non-contact sheet material picking device of the present invention.

[0019] Figure 2 This is a schematic diagram of the exploded structure of the non-contact sheet material picking device of the present invention.

[0020] Figure 3 It is a cross-sectional view of the non-contact sheet material picking device of the present invention.

[0021] Figure 4 for Figure 3 Partial cross-sectional view of the pickup head and positive pressure module.

[0022] Figure 5 This is a cross-sectional view of the pickup head and the piston rod in the present invention when they are an integrally formed structure.

[0023] Figure 6 It is a partial cross-sectional view of the annular spring piece provided between the annular body and the positioning groove in the present invention.

[0024] Figure 7 Schematic diagram of the structure of the annular spring in the present invention.

[0025] Figure 8 It is a schematic diagram of the exploded structure of the ring body and the rubber block in the present invention.

[0026] Figure 9 Schematic diagrams for comparison of the rubber block of the present invention when it is installed in the receiving groove in different orientations.

[0027] Figure 10 2 is a cross-sectional view of a second embodiment of a non-contact sheet material picking device according to the present invention.

[0028] Figure 11 for Figure 10 Partial cross-sectional view of the deceleration spring.

[0029] Figure 12 It is a schematic diagram of the partial structure of the ring body and the front end cover in the second embodiment. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used with reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0032] The terms "first" and "second" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0033] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, connection can be a detachable connection or an integral structural connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] When picking up stacked sheet materials, the sheet material picking device in the prior art is prone to electrostatic adsorption between the sheet materials or the momentary vacuum space between the stacked sheet materials when they are separated. This can easily cause the target sheet material to be adsorbed along with the underlying sheet material when it is picked up, resulting in the problem of multiple sheet materials being picked up at the same time. This is especially true for breathable sheet materials, which are more likely to be picked up with multiple sheets, greatly affecting production efficiency.

[0035] The following is a first embodiment of a non-contact sheet material picking device provided by the present invention that can solve the above technical problems.

[0036] Please refer to Figures 1 to 3 In the figures, units with similar structures are represented by the same reference numerals.

[0037] This embodiment provides a non-contact sheet material picking device, which includes: a cylinder 11 , a piston rod 14 , a piston 15 , a return spring 16 , a picking head 12 , and a positive pressure module 13 .

[0038] A piston 15 is slidably disposed within the cylinder 11. One end of the piston rod 14 is slidably connected within the cylinder 11 and fixedly connected to the piston 15. The piston 15 and piston rod 14 may be threaded. A return spring 16 is sleeved around the outer circumference of the piston rod 14 and compressed between the piston 15 and the inner end surface of the cylinder 11. The return spring 16 is used to drive the piston 15 to slide away from the pickup head 12, thereby retracting the piston rod 14 further into the cylinder 11.

[0039] A negative pressure chamber X is formed between the inner wall of the cylinder 11, the piston 15, and the piston rod 14. A negative pressure interface 111 connected to the negative pressure chamber X is provided on the outer wall of the cylinder 11. The negative pressure interface 111 is connected to an external negative pressure device, and a threaded hole for connecting to the negative pressure device can be provided in the negative pressure interface 111.

[0040] A hollow chamber Y is axially extending through the piston rod 14. A connecting hole 141 is provided on the outer wall of the piston rod 14, connecting the hollow chamber Y with the negative pressure chamber X. The pickup head 12 is connected to the end of the piston rod 14 away from the piston 15. The pickup head 12 is provided with a suction hole 121 extending through the pickup head 12, connecting to the hollow chamber Y. When the external negative pressure device is in operation, generating a negative pressure in the negative pressure chamber X, the piston 15 overcomes the elastic force of the return spring 16 due to the pressure differential between the negative pressure chamber X and the hollow chamber Y, pushing the piston 15 and the piston rod 14 toward the outside of the cylinder 11. Simultaneously, the presence of the connecting hole 141 generates a negative pressure in the hollow chamber Y, thereby enabling the suction hole 121 to pick up the sheet material.

[0041] Please refer to Figure 4 The positive pressure module 13 is connected to the periphery of the picking head 12. A positive pressure chamber Z is provided in the positive pressure module 13. A positive pressure interface 131 is provided on the outer wall of the positive pressure module 13 and is connected to the positive pressure chamber Z. The positive pressure interface 131 is connected to an external positive pressure device. A threaded hole for connecting to the positive pressure device can be provided in the positive pressure interface 131. The picking head 12 is provided with an air blowing hole 122 that connects the positive pressure chamber Z with the external space. The air blowing hole 122 blows air toward the gap between the positive pressure module 13 and the sheet material. There is a high-speed airflow in the gap between the positive pressure module 13 and the sheet material. According to Bernoulli's principle, the high-speed airflow will cause a negative pressure to be formed in the gap between the positive pressure module 13 and the sheet material. The negative pressure exerts an adsorption force on the sheet material to move closer to the positive pressure module 13, forming a non-contact picking. At the same time, part of the air flow from the blowing holes 122 will flow toward the sheet materials. If the sheet materials are breathable, the air flow will pass through the breathable sheet materials and fill the spaces between the stacked sheet materials, thus avoiding picking up multiple sheets at a time.

[0042] On the other hand, the position where part of the airflow from the blowing hole 122 blows to the sheet material is different from the position where the adsorption hole 121 adsorbs the sheet material. In this way, the blowing of the air from the blowing hole 122 to the sheet material is unlikely to have a significant impact on the adsorption of the sheet material by the adsorption hole 121.

[0043] In this embodiment, a sink 132 is provided on the side of the positive pressure module 13 away from the cylinder 11, and the circumferential side wall of the sink 132 is an inclined guide surface 133. The outer edge of the guide surface 133 is farther away from the picking head 12 than the inner edge. A plurality of blowing holes 122 are provided on the peripheral side of the picking head 12. The blowing holes 122 blow air toward the guide surface 133. The air flow will flow along the guide surface 133 and the end surface of the positive pressure module 13 away from the cylinder 11, and the blown air flow will be more dispersed and uniform, and have a good adsorption effect on the sheet material.

[0044] Specifically, in this embodiment, a positive pressure chamber Z is formed between the positive pressure module 13 and the picking head 12, and a ring body portion 123 is provided on the circumferential side of the end of the picking head 12 away from the piston rod 14, and a groove connected to the positive pressure chamber Z is provided on the side of the ring body portion 123 close to the piston rod 14, and the blowing holes 122 are provided on the ring body portion 123, and multiple blowing holes 122 are connected to the groove, so that the positive pressure gas in the positive pressure chamber Z is blown toward the sheet material through the blowing holes 122.

[0045] Furthermore, the end face of the pickup head 12 is positioned within the sink 132 and is spaced a set distance from the end face of the positive pressure module 13. This allows the center of the sheet material to be absorbed by the absorption holes 121, while the periphery of the sheet material sags downward. A small gap remains between the end face of the positive pressure module 13, which is away from the cylinder 11, and the sheet material. This gap allows the air holes 122 to blow out high-speed airflow, effectively absorbing the sheet material. However, if the end face of the pickup head 12 protrudes beyond the sink 132, the gap between the end face of the positive pressure module 13 and the sheet material will be too large, resulting in poor absorption.

[0046] At the same time, the entire trough 132 generates negative pressure, has a larger adsorption area and a larger suction force, can stably absorb sheet materials, is not easy to fall, has high stability, and can also improve work efficiency.

[0047] Please refer to Figure 4Optionally, the pickup head 12 and the piston rod 14 can be detachably fixed and plugged together. A threaded connection can be used between the pickup head 12 and the piston rod 14. A positioning groove is provided in the recessed groove 132 to cooperate with the positioning of the ring body 123. The positive pressure module 13 is limited between the ring body 123 and the end face of the piston rod 14. The positive pressure module 13 can be easily connected to the pickup head 12 and the piston rod 14. The pickup head 12 and the positive pressure module 13 require a relatively fine fitting connection, and the pickup head 12 requires more structures to be designed. The pickup head 12 and the piston rod 14 are provided separately, so that the pickup head 12 can be replaced at a low cost if damaged.

[0048] Please refer to Figure 6 and Figure 7 Because different breathable sheet materials have varying degrees of permeability, the blowing requirements for the blowholes 122 also vary. In the present invention, an annular spring piece 17 can be disposed between the annular body 123 and the inner bottom surface of the positioning groove. The annular spring piece 17 is uniformly provided with upwardly and downwardly curved concave and convex structures along the circumference, and the elastic force of the annular spring piece 17 is very uniform and stable. The annular spring piece 17 ensures a relatively tight connection between the pickup head 12 and the piston rod 14 within a set thread insertion depth range. Within the set thread insertion depth range, the blowholes 122 can have varying degrees of intersection area with the sidewalls of the positioning groove. This allows the pickup head 12 to rotate to adjust the intersection area between the blowholes 122 and the sidewalls of the positioning groove when picking up breathable sheet materials with varying degrees of permeability, thereby adjusting the amount of air blown through the blowholes 122.

[0049] When the air-permeable sheet material is highly permeable, the intersection area between the blowing holes 122 and the sidewalls of the positioning groove is reduced to allow more airflow between the stacked sheet materials, preventing the suction holes 121 from adsorbing the sheet material on the lower layer. When the air-permeable sheet material is less permeable, the intersection area between the blowing holes 122 and the sidewalls of the positioning groove is increased to allow less airflow to flow toward the sheet material, preventing the blowing holes 122 from generating a large airflow on the first sheet material, which would make it difficult for the suction holes 121 to pick up the sheet material.

[0050] Please refer to Figure 8 and Figure 9Furthermore, in order to enable more refined and diverse adjustment of the air hole 122, in this embodiment, a resilient rubber block 18 may be detachably provided on the ring body 123, and a receiving groove 19 for interference-fitting the rubber block 18 may be provided on the ring body 123. An air guide hole 181 is provided on the rubber block 18, and the center of the air guide hole 181 is offset from the center of the rubber block 18 in the axial direction of the pickup head 12. An elongated through hole 191 communicating with the positive pressure chamber Z is provided in the receiving groove 19, and the extension direction of the elongated through hole 191 is consistent with the axial direction of the pickup head 12. When the rubber block 18 is installed in the receiving groove 19 in different orientations, the air guide hole 181 is connected to the elongated through hole 191 to form the air hole 122.

[0051] Please refer to Figure 9 It is understood that the rubber block 18 has a centrally symmetrical structure, such as a rectangular block or a rounded rectangular block. The rubber block 18 can be rotated 180° to fit within the receiving groove 19. When the rubber block 18 is installed within the receiving groove 19 in a first orientation, the air guide hole 181 is located at a first axial height position of the annular body 123. When the rubber block 18 is rotated 180° to fit within the receiving groove 19 in a second orientation, the air guide hole 181 is located at a second axial height position of the annular body 123. The first and second axial height positions are different.

[0052] That is Figure 9 By differentially arranging the installation positions of the plurality of rubber blocks 18, it is possible to arrange all the air blowing holes 122 at the same axial height, or to arrange some of the air blowing holes 122 at different axial heights from the other air blowing holes 122. Thus, when the pickup head 12 is rotated, the intersection area between all the air blowing holes 122 and the sidewalls of the positioning groove can be adjusted, or the intersection area between a portion of the air blowing holes 122 and the sidewalls of the positioning groove can be adjusted, making the adjustment more refined and diversified.

[0053] It should also be noted that the rubber blocks 18 can be set on all the ring body 123 to form the blowing holes 122, or some blowing holes 122 can be directly set on the ring body 123, and then the rubber blocks 18 are set at intervals between the blowing holes 122.

[0054] Please refer to Figure 5 Optionally, the pickup head 12 and the piston rod 14 can be an integrally formed structure, which reduces the connection and assembly between the pickup head 12 and the piston rod 14, reduces the number of assembly and disassembly steps, and provides a stronger integrity.

[0055] Please refer to Figure 2 and Figure 3 In this embodiment, the cylinder 11 includes a main cylinder 112 , a rear end cover 113 , a retaining ring 114 , and a buffer pad 115 .

[0056] An installation opening is provided at one end of the main cylinder 112 away from the pickup head 12 , and the installation opening can be used to install components such as the piston 15 , the piston rod 14 and the return spring 16 in the main cylinder 112 .

[0057] The sidewall of the mounting opening is provided with a mounting groove 1121, and the inner wall of mounting groove 1121 is provided with a retaining groove. The rear end cover 113 is disposed within mounting groove 1121. A first sealing ring 1131 is disposed between the rear end cover 113 and the inner wall of mounting groove 1121 to improve sealing. A buffer pad 115 is disposed on the side of the rear end cover 113 closest to the piston 15. When the piston 15 is reset, the piston 15 contacts the buffer pad 115, cushioning the impact of the collision between the piston 15 and the buffer pad 115, thereby enhancing quietness. A retaining ring 114 is connected to the retaining groove and secures the rear end cover 113 within the mounting groove 1121.

[0058] In addition, the cylinder barrel 11 also includes a front end cover 116, which is a cylindrical structure. The front end cover 116 is connected to the end of the main barrel 112 away from the rear end cover 113. The front end cover 116 and the cylinder barrel main barrel 112 can be fixed by a threaded connection. A second sealing ring 1161 is provided between the front end cover 116 and the main barrel 112 to improve the sealing performance. The negative pressure interface 111 is provided on the outer wall of the front end cover 116, and the piston rod 14 is slidably sleeved in the front end cover 116. The inner diameter of the position where the front end cover 116 and the piston rod 14 slide together is smaller than the inner diameter of the main barrel 112. The front end cover 116 and the main barrel 112 are designed as separate bodies. The main barrel 112 only needs to be cut and processed using a hollow long tube with the same inner diameter, which reduces the overall cost.

[0059] In this embodiment, an annular fixing groove is provided around the piston 15, in which a third sealing ring 151 is provided for contacting the inner wall of the cylinder 11 to improve sealing. A fourth sealing ring is provided between the positive pressure module 13 and the pickup head 12 to improve sealing.

[0060] Preferably, the negative pressure interface 111 and the positive pressure interface 131 face the same side, which facilitates connection with external negative pressure equipment and positive pressure equipment.

[0061] In this embodiment, the picking head 12 and the positive pressure module 13 are made of conductive metal. The picking head 12 is very close to the sheet material, which can weaken the static electricity between the sheet materials and reduce the adsorption force generated by static electricity between the sheet materials, thereby better avoiding picking up multiple sheet materials at a time.

[0062] It should be noted that, without considering reducing the static electricity between the sheet materials, the pickup head 12 and the positive pressure module 13 are made of non-conductive materials such as plastic, and the sheet materials can be effectively picked up by utilizing the combination of the adsorption holes 121 and the blowing holes 122.

[0063] On the other hand, there is a high-speed airflow between the pickup head 12, the positive pressure module 13 and the sheet material. There is moisture in the airflow, so the high-speed airflow can also eliminate and reduce the static electricity of the sheet material.

[0064] The working principle of the present invention is as follows: when picking up breathable sheet materials, negative pressure gas is introduced into the negative pressure interface 111. Due to the pressure difference between the negative pressure chamber X and the hollow chamber Y, under the action of the pressure difference, the piston 15 will overcome the elastic force of the return spring 16, and will push the piston 15 and the piston rod 14 toward the outside of the cylinder 11. The piston rod 14 extends out of the cylinder 11 and approaches the laminated sheet materials. At the same time, the existence of the connecting hole 141 will generate negative pressure in the hollow chamber Y, thereby enabling the adsorption hole 121 to pick up the sheet materials.

[0065] On the other hand, positive pressure gas is introduced into the positive pressure interface 131, and the multiple air blowing holes 122 blow air toward the guide surface 133, blowing a high-speed airflow into the gap between the positive pressure module 13 and the sheet material, generating negative pressure. The negative pressure exerts a suction force on the sheet material, causing it to move toward the positive pressure module 13. At the same time, part of the airflow from the air blowing holes 122 passes through the breathable sheet material and fills the gaps between the stacked sheet materials, thus avoiding the need to pick up multiple sheets at a time. Furthermore, the blowing position of the air blowing holes 122 on the sheet material is different from the suction position of the suction holes 121 on the sheet material. This makes it less likely that the air blowing from the air blowing holes 122 will significantly affect the suction of the sheet material by the suction holes 121, thereby reducing the suction of the underlying sheet material. This allows the pickup head to stably pick up a single breathable sheet material, thus avoiding the need to pick up multiple sheets.

[0066] When the pickup head 12 absorbs the breathable sheet material, both the suction holes 121 and the air holes 122 generate a negative pressure that attracts the sheet material. Simultaneously, the sheet material blocks the sink 132, creating a negative pressure across the entire sink 132. This creates a large suction area and a strong suction force, stably holding the sheet material with exceptional stability and efficiency. Simultaneously, the sheet material blocks the suction holes 121, disconnecting the hollow chamber Y from the atmosphere. The pressure in the hollow chamber Y gradually equalizes with the pressure in the negative pressure chamber X. Under the elastic force of the spring 16, the piston rod 14 retracts, thereby picking up the single sheet material.

[0067] When the picked-up sheet material is taken away, the hollow chamber Y is connected to the atmosphere again, and a pressure difference is formed between the negative pressure chamber X and the hollow chamber Y. The picking head 12 will extend out of the cylinder 11 again to pick up the sheet material. In this way, the picking head 12 can move back and forth to pick up the sheet material.

[0068] When it is necessary to pick up airtight sheet materials, negative pressure gas is introduced into the negative pressure interface 111, while positive pressure gas does not need to be introduced into the positive pressure interface 131. Due to the pressure differential between the negative pressure chamber X and the hollow chamber Y, the piston 15 overcomes the elastic force of the return spring 16 under the action of the pressure differential, pushing the piston 15 and the piston rod 14 toward the outside of the cylinder 11. The piston rod 14 extends out of the cylinder 11 and approaches the stacked sheet materials. At the same time, the presence of the connecting hole 141 creates a negative pressure within the hollow chamber Y, thereby enabling the adsorption hole 121 to pick up the sheet materials. At the same time, the pickup head 12 and the positive pressure module 13 are made of conductive metal. The close proximity of the pickup head 12 to the sheet materials can reduce static electricity between the sheet materials, reducing the adsorption force between the sheet materials due to static electricity, and better avoiding picking up multiple sheet materials at a time.

[0069] Similarly, when the airtight sheet material blocks the adsorption hole 121, hollow chamber Y is no longer connected to the atmosphere. The pressure in hollow chamber Y gradually becomes equal to that in negative pressure chamber X. Under the elastic force of spring 16, piston rod 14 retracts, thereby picking up the single sheet material. After the picked-up sheet material is removed, hollow chamber Y is connected to the atmosphere again, and a pressure differential is formed between negative pressure chamber X and hollow chamber Y. The pickup head 12 will extend out of cylinder 11 again to pick up the sheet material.

[0070] It should also be noted that when picking up airtight sheet materials, positive pressure gas can be supplied through positive pressure port 131. However, the positive pressure should not be too strong, as this will cause some of the airflow directed toward the sheet material, hindering the picking process. Multiple sheet materials are typically stacked in a material box. The airflow from positive pressure port 131, rebounding from the inner wall of the box, can similarly fill the gaps between the stacked sheets, thus preventing the need to pick up multiple sheets at once.

[0071] This completes the process of picking up sheet materials by the non-contact sheet material picking device of this embodiment.

[0072] The following is a second embodiment of a non-contact sheet material pickup device provided by the present invention that addresses the aforementioned technical issues. Compared to the first embodiment, the second embodiment incorporates a ring member, a deceleration spring, and a magnet block. This reduces the initial lift speed of the pickup head after it picks up a sheet material, further preventing the risk of underlying sheets being dragged up. However, this design also results in higher overall costs.

[0073] Please refer to Figure 1 and Figure 10 In the figures, units with similar structures are represented by the same reference numerals.

[0074] This embodiment provides a non-contact sheet material picking device, which includes: a cylinder 11 , a piston rod 14 , a piston 15 , a return spring 16 , a picking head 12 , and a positive pressure module 13 .

[0075] The piston 15 is slidably disposed in the cylinder 11 . An annular fixing groove is provided on the circumference of the piston 15 . A third sealing ring 151 is provided in the fixing groove for contacting the inner wall surface of the cylinder 11 to improve sealing performance.

[0076] One end of the piston rod 14 slides within the cylinder 11 and is fixedly connected to the piston 15. The piston 15 and piston rod 14 may be threaded. A return spring 16 is sleeved around the outer circumference of the piston rod 14 and compressed between the piston 15 and the inner end surface of the cylinder 11. This spring 16 drives the piston 15 to slide away from the pickup head 12, thereby retracting the piston rod 14 further into the cylinder 11.

[0077] A negative pressure chamber X is formed between the inner wall of the cylinder 11, the piston 15, and the piston rod 14. A negative pressure interface 111 connected to the negative pressure chamber X is provided on the outer wall of the cylinder 11. The negative pressure interface 111 is connected to an external negative pressure device, and a threaded hole for connecting to the negative pressure device can be provided in the negative pressure interface 111.

[0078] A hollow chamber Y is axially extending through the piston rod 14. A connecting hole 141 is provided on the outer wall of the piston rod 14, connecting the hollow chamber Y with the negative pressure chamber X. The pickup head 12 is connected to the end of the piston rod 14 away from the piston 15. The pickup head 12 is provided with a suction hole 121 extending through the pickup head 12, connecting to the hollow chamber Y. When the external negative pressure device is in operation, generating a negative pressure in the negative pressure chamber X, the piston 15 overcomes the elastic force of the return spring 16 due to the pressure differential between the negative pressure chamber X and the hollow chamber Y, pushing the piston 15 and the piston rod 14 toward the outside of the cylinder 11. Simultaneously, the presence of the connecting hole 141 generates a negative pressure in the hollow chamber Y, thereby enabling the suction hole 121 to pick up the sheet material.

[0079] In this embodiment, the cylinder 11 includes a main body 112 , a rear end cover 113 , a retaining ring 114 , and a buffer pad 115 .

[0080] An installation opening is provided at one end of the main cylinder 112 away from the pickup head 12 , and the installation opening can be used to install components such as the piston 15 , the piston rod 14 and the return spring 16 in the main cylinder 112 .

[0081] The sidewall of the mounting opening is provided with a mounting groove 1121, and the inner wall of mounting groove 1121 is provided with a retaining groove. The rear end cover 113 is disposed within mounting groove 1121. A first sealing ring 1131 is disposed between the rear end cover 113 and the inner wall of mounting groove 1121 to improve sealing. A buffer pad 115 is disposed on the side of the rear end cover 113 closest to the piston 15. When the piston 15 is reset, the piston 15 contacts the buffer pad 115, cushioning the impact of the collision between the piston 15 and the buffer pad 115, thereby enhancing quietness. A retaining ring 114 is connected to the retaining groove and secures the rear end cover 113 within the mounting groove 1121.

[0082] In addition, the cylinder barrel 11 also includes a front end cover 116, which is a cylindrical structure. The front end cover 116 is connected to the end of the main barrel 112 away from the rear end cover 113. The front end cover 116 and the cylinder barrel main barrel 112 can be fixed by a threaded connection. A second sealing ring 1161 is provided between the front end cover 116 and the main barrel 112 to improve the sealing performance. The negative pressure interface 111 is provided on the outer wall of the front end cover 116, and the piston rod 14 is slidably sleeved in the front end cover 116. The inner diameter of the position where the front end cover 116 and the piston rod 14 slide together is smaller than the inner diameter of the main barrel 112. The front end cover 116 and the main barrel 112 are designed as separate bodies. The main barrel 112 only needs to be cut and processed using a hollow long tube with the same inner diameter, which reduces the overall cost.

[0083] Please refer to Figure 10-12 In this embodiment, the non-contact sheet material pickup device further includes a ring member 22, a deceleration spring 21, and a magnet 25. The ring member 22 is slidably disposed within the main cylinder 112 and sleeved around the outer circumference of the piston rod 14. The deceleration spring 21 is connected between the ring member 22 and the front end cover 116. The magnet 25 is disposed on the side of the ring member 22 closest to the piston 15.

[0084] The ring body 22 has a first connection block 221 on one side for connecting to the deceleration spring 21, and the front end cover 116 has a second connection block 1161 on its end face for connecting to the deceleration spring 21. Both the first connection block 221 and the second connection block 1161 have connection holes for connecting to the deceleration spring 21.

[0085] When the pickup head 12 picks up a sheet of material, the magnet 25 engages the piston. When the pickup head 12 picks up the sheet and moves a set distance, the magnet 25 separates from the piston. The magnet 25 can be made of a weakly magnetic material to prevent the magnet 25 from becoming too tightly attached to the piston 15 and making it difficult to separate. It should also be noted that the piston 15 can be made of iron or a magnet corresponding to the magnet 25 can be provided on the piston 15 to facilitate adhesion between the two.

[0086] Furthermore, a side portion of the ring body 22 close to the front end cover is connected to a limiting rod 23 extending axially along the ring body 22, a limiting groove 24 is axially provided on the inner wall surface of the main cylinder 112, and a limiting block 231 is provided at one end of the limiting rod 23 to slide with the limiting groove 24.

[0087] When the deceleration spring 21 is in a natural state, the limit block 231 is at a set distance from the end surface of the limit groove 24 close to the piston 15. In this way, when the picking head 12 absorbs the sheet material and moves, the deceleration spring 21 can offset part of the elastic force of the return spring 16, and the driving force of the return spring 16 will be smaller. In this way, the return spring 16 will initially drive the piston rod 14 to return and slide at a lower speed, and the picking head 12 will not pick up the sheet material at an excessively fast speed, thereby preventing the lower layer of the picked sheet material from being carried up.

[0088] When the pickup head 12 picks up a sheet of material and moves a set distance, the stopper 231 contacts the end surface of the stopper groove 24 near the piston 15. This surface blocks the movement of the stopper 231, allowing the magnet 25 to separate from the piston. At this point, the pickup head 12 has already picked up the sheet of material and risen a certain distance. The return spring 16 then applies a greater driving force, driving the pickup head 12 upward at a faster speed, improving pickup efficiency. This results in higher overall efficiency and a lower risk of dragging up the underlying sheet of material.

[0089] It should be noted that the piston will never contact the limiting groove 24 during its sliding stroke, and will not affect the air pressure of the negative pressure chamber X.

[0090] The non-contact sheet material picking device of the present invention can pick up breathable or non-breathable sheet materials, and is more stable than traditional picking components. It can well avoid picking up multiple sheet materials at a time, is simpler to control, is very efficient, and greatly saves costs.

[0091] Specifically, by setting up suction holes and air blowing holes on the pickup head, when the suction holes and air blowing holes are working simultaneously, the suction holes can generate adsorption force on the sheet material. At the same time, the high-speed airflow blown by the air blowing holes into the gap between the positive pressure module and the sheet material can generate negative pressure, which can adsorb the sheet material. The airflow from the air blowing holes will flow to the laminated breathable sheet material, which can quickly fill the instantaneous vacuum space created by the separation of the sheet material and reduce the adsorption of the suction holes on the lower layer of sheet material. The suction holes and air blowing holes work together to effectively pick up a single breathable sheet material, avoiding picking up multiple sheets of sheet material, and achieving high efficiency. When only the suction holes are working, it can be used to pick up non-breathable sheet materials, with high adsorption compatibility and diverse functions.

[0092] On the other hand, the position where part of the airflow from the blowing hole blows toward the sheet material is different from the position where the adsorption hole adsorbs the sheet material. In this way, the blowing of the air through the blowing hole toward the sheet material is unlikely to have a significant impact on the adsorption of the sheet material by the adsorption hole.

[0093] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A non-contact sheet material picking device, characterized in that: include: Cylinder, piston rod, piston, return spring, pickup head, and positive pressure module; The cam is provided with a plurality of sealing rings, each of which is connected to the inner wall of the cylinder and has a plurality of sealing rings connected to the outer wall of the cylinder. The sealing rings are connected to the outer wall of the cylinder and the outer wall of the piston rod. The sealing rings are connected to the inner wall of the cylinder and the inner wall of the piston rod. The positive pressure module is connected to the outer periphery of the picking head, a positive pressure chamber is provided in the positive pressure module, a positive pressure interface which passes through the positive pressure chamber is provided on the outer wall of the positive pressure module, and an air blowing hole which connects the positive pressure chamber and the external space is provided on the picking head, and the air blowing hole blows air toward the gap between the positive pressure module and the sheet material to generate negative pressure so as to adsorb the sheet material.

2. The non-contact sheet material picking device according to claim 1, characterized in that: A sink is provided on the side of the positive pressure module away from the cylinder, and the circumferential side wall of the sink is an inclined guide surface. The outer edge of the guide surface is farther away from the picking head than the inner edge. A plurality of blowing holes are provided on the circumferential side of the picking head, and the blowing holes blow air toward the guide surface.

3. The non-contact sheet material picking device according to claim 2, characterized in that: The positive pressure chamber is formed between the positive pressure module and the pickup head. The pickup head is provided with a ring body portion on the circumference of one end away from the piston rod. The ring body portion is provided with a groove connected to the positive pressure chamber close to the side of the piston rod. The blowing hole is provided on the ring body portion, and the blowing hole is connected to the groove.

4. The non-contact sheet material picking device according to claim 2, characterized in that: The end surface of the pickup head is located in the sink, and the end surface of the pickup head is at a set distance from the end surface of the positive pressure module.

5. The non-contact sheet material picking device according to claim 1, characterized in that: The cylinder includes a main cylinder body, a rear end cover, a buckle, and a buffer pad; The main cylinder is provided with a mounting opening at one end away from the pickup head, a mounting groove is provided on the side wall of the mounting opening, a clamping groove is provided on the inner wall of the mounting groove, the rear end cover is provided in the mounting groove, a first sealing ring is provided between the rear end cover and the inner wall of the mounting groove, the buffer pad is provided on a side of the rear end cover close to the piston, the retaining ring is connected in the clamping groove, and the retaining ring fixes and restricts the rear end cover in the mounting groove.

6. The non-contact sheet material picking device according to claim 5, characterized in that: The cylinder also includes a front end cover, which is a cylindrical structure. The front end cover is connected to one end of the main cylinder away from the rear end cover. A second sealing ring is provided between the front end cover and the main cylinder. The negative pressure interface is provided on the outer wall of the front end cover. The negative pressure interface and the positive pressure interface face the same side, and the piston rod is slidably sleeved in the front end cover.

7. The non-contact sheet material picking device according to claim 6, characterized in that: The non-contact sheet material picking device further includes a ring member, a deceleration spring, and a magnet block. The ring member is slidably disposed in the main cylinder and sleeved on the outer circumference of the piston rod. The deceleration spring is connected between the ring member and the front end cover. The magnet block is disposed on a side of the ring member close to the piston. When the pickup head absorbs the sheet material, the magnet block is in adsorption contact with the piston. When the pickup head picks up the sheet material and moves a set distance, the magnet block is separated from the piston.

8. The non-contact sheet material picking device according to claim 7, characterized in that: A side portion of the ring body part close to the front end cover is connected to a limit rod extending axially along the ring body part, a limit groove is axially arranged on the inner wall surface of the main cylinder body, and one end of the limit rod is provided with a limit block slidingly engaged with the limit groove. When the deceleration spring is in a natural state, the limit block is at a set distance from the end face of the limit groove close to the piston. When the limit block contacts the end face of the limit groove close to the piston, the magnet block is separated from the piston.

9. The non-contact sheet material picking device according to claim 2, characterized in that: The pickup head and the piston rod are a detachable fixed plug-in structure, a positioning groove is provided in the sink to cooperate with the ring body, and the positive pressure module is limited between the ring body and the end face of the piston rod.

10. The non-contact sheet material picking device according to claim 3, characterized in that: The pickup head is threadedly connected to the piston rod, a positioning groove is provided in the sink groove and is matched with the ring body portion, and an annular spring is provided between the ring body portion and the inner bottom surface of the positioning groove. When the pickup head and the piston rod are at different threaded depths, the blowing hole and the side wall of the positioning groove have different degrees of intersection area; A resilient rubber block is detachably provided on the ring body, a receiving groove for interference-fitting the rubber block is provided on the ring body, an air guide hole is provided on the rubber block, the center of the air guide hole and the center of the rubber block are offset in the axial direction of the pickup head, a long through hole connected to the positive pressure chamber is provided in the receiving groove, and when the rubber block is installed in the receiving groove in different orientations, the air guide holes are connected to the long through hole to form the blowing hole.

Images