Opening bag clamping and opening linkage device

Abstract

The invention discloses an open bag clamping and opening linkage device which comprises a discharging hopper, a rack, a bag opening air cylinder, a bag clamping mechanism, a bag opening mechanism and a four-direction synchronous opening and closing mechanism. An outlet positioning supporting plate with a material passing hole formed in the middle is installed at the bottom of the rack, the discharging hopper is installed on the outlet positioning supporting plate, the bag opening mechanism comprises two bag opening plates which are rotationally and symmetrically installed on the front side and the rear side below the material passing hole respectively, and two lifting plates are installed on the top of the rack in a bilateral symmetry mode relative to the discharging hopper. The number of the bag clamping mechanisms is two, and the two bag clamping mechanisms are symmetrically hoisted below the two hoisting plates correspondingly. The four-direction synchronous opening and closing mechanism is arranged by means of the machine frame, the bag opening air cylinder is connected with the action input end of the four-direction synchronous opening and closing mechanism, and the action output end of the four-direction synchronous opening and closing mechanism is connected with the two bag opening plates and the two bag clamping mechanisms respectively. In this way, the synchronous delay can be reduced, and the bag opening efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of packaging machinery, in particular to an open bag clamping and opening linkage device. Background Art

[0002] Open-mouth bags are widely used for packaging fine chemical raw materials such as ultrafine powders, metal ore and non-metallic mineral powders, pharmaceutical chemical raw materials, dyes, pigments, calcium carbonate, kaolin, phenolic resins, and even food such as flour, seasonings and other powder or granular materials. Open-mouth bag filling machines are widely used in industries other than the aforementioned products because of their high filling efficiency, accurate metering, low manpower input, and help to reduce the workload of workers and improve the environment of the filling workplace.

[0003] A complete set of open-mouth bag packaging machines usually includes: automatic quantitative weighing device, i.e. automatic quantitative scale, bag warehouse, automatic bag loading device, bag clamping-opening device, unloading device, automatic bag patting device, automatic bag transport trolley, automatic sealing introduction device and automatic sealing device. The bag clamping-opening device first clamps the open-mouth bag delivered by the bag loading device and then opens the bag mouth, which is convenient for the subsequent unloading device to discharge the material. The quality of the bag opening state in this process directly affects the quality of subsequent filling. At present, the commonly used bag opening device generally uses at least two synchronous cylinders to push the corresponding structure of the bag opening plate from two opposite directions perpendicular to the bag clamping direction to open the bag mouth to complete the bag opening action. However, it is found in practice that the difference between the synchronous cylinders gradually increases with the increase of the use time, and the two cannot be completely synchronized. The reaction in the bag opening action is that sometimes one side of the bag opening speed is slower, and even the bag opening amplitude does not meet the requirements. In this way, when loading, it sometimes does not match the clock frequency of the existing equipment loading, and even packaging leakage problems may occur. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide an open-mouth bag clamping and opening linkage device, which can improve the reliability of the overall operation and reduce the synchronization delay.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide an open-mouth bag clamping and opening bag linkage device, the open-mouth bag clamping and opening bag linkage device comprises: a lower hopper, a frame, a bag opening cylinder, a bag clamping mechanism, a bag supporting mechanism and a four-way synchronous opening and closing mechanism; an outlet positioning support plate is installed at the bottom of the frame, a feeding hole is provided in the middle of the outlet positioning support plate, the lower hopper is installed on the outlet positioning support plate, the feeding hole is aligned with the discharge port of the lower hopper, the bag supporting mechanism comprises two bag supporting plates, which are rotatably and symmetrically installed on the front and rear sides below the feeding hole, and two lifting plates are symmetrically installed on the top of the frame about the lower hopper. A lifting position is arranged under each lifting plate, and there are two bag clamping mechanisms, which are symmetrically lifted on the two lifting positions respectively; the bag opening cylinder is installed on the outer side of one side of the frame, and the four-way synchronous opening and closing mechanism is arranged on the basis of the frame, and the telescopic rod of the bag opening cylinder is connected with the action input end of the four-way synchronous opening and closing mechanism. There are four action output ends of the four-way synchronous opening and closing mechanism, two of which are respectively connected to two bag-holding plates, and two are simultaneously connected to two bag clamping mechanisms. Through the four-way synchronous opening and closing mechanism, the telescopic action of the telescopic rod of the bag opening cylinder can simultaneously drive the bag-holding plates of the two bag-holding mechanisms and the two bag clamping mechanisms to be opened or closed at the same time.

[0006] In a preferred embodiment of the present invention, a discharge protection cover is further provided on the outer side of the discharge hole of the outlet positioning support plate, the bag support plate is installed on the inner side of the protection cover, and the longitudinal length of the bag support plate is greater than the longitudinal length of the discharge protection cover.

[0007] In a preferred embodiment of the present invention, an auxiliary bracket is installed on the side of the frame, and the four-way synchronous opening and closing mechanism is installed on the frame relying on the auxiliary bracket. There are two auxiliary brackets, namely a first auxiliary bracket and a second auxiliary bracket. The first auxiliary bracket is provided with a first lever seat, and the second auxiliary bracket is provided with a second lever seat. The four-way synchronous opening and closing mechanism includes a first linkage lever, a second linkage lever, a linkage push rod, a transverse push rod, and a longitudinal push rod. The first linkage lever is installed on the first lever seat, and the second linkage lever is installed on the second lever seat. One end of the first linkage lever is connected to the end of the telescopic rod of the bag opening cylinder, and the other end is connected to the second linkage lever through the linkage push rod. There are two transverse push rods, which are arranged in parallel. On both sides of the first linkage lever, there are a long transverse push rod and a short transverse push rod respectively. The long transverse push rod is connected to the bag clamping mechanism far away from the first linkage lever, and the short transverse push rod is connected to the bag clamping mechanism close to the first linkage lever. A push handle is provided in the middle of the second linkage lever. The linkage push rod is connected to the push handle and can push the second linkage lever to rotate around the second lever seat. Two longitudinal push rods are arranged in parallel at both ends of the second linkage lever, one of the two longitudinal push rods is a long longitudinal push rod, and the other is a short longitudinal push rod. The long longitudinal push rod and the short longitudinal push rod are respectively connected to the bag holding mechanism on the front and rear sides.

[0008] The bag-supporting mechanism also includes two low-position hangers, which are symmetrically installed on the front and rear sides of the material passing hole of the outlet positioning support plate. A rotating shaft is provided in the middle of the low-position hanger, and the bag-supporting plate is installed on the rotating shaft and can rotate with the rotating shaft. A rocking plate is provided on each rotating shaft, and the end of the longitudinal push rod is hinged to the rocking plate on the corresponding rotating shaft.

[0009] The bag clamping mechanism includes a bag clamping cylinder and a chuck, a hanging joint is provided at the tail end of the bag clamping cylinder, an action converter is provided between the telescopic rod of the bag clamping cylinder and the chuck, a transmission shaft is provided on the corresponding lifting position on the lifting plate, the hanging joint is installed at one end of the corresponding transmission shaft close to the center line of the feeding hole, and a rocker arm is installed at the other end of the transmission shaft, and the rocker arm is hinged to the lateral push rod on the corresponding side.

[0010] The beneficial effects of the present invention are as follows: the present invention optimizes the structure of the bag clamping and bag opening device of the existing open-mouth bag packaging machine, and simultaneously connects the two bag-holding plates and the bag clamping mechanisms on both sides by adopting a four-way synchronous four-way synchronous opening and closing mechanism. In this way, after the bag clamping mechanism clamps the bag mouth, the telescopic action of the telescopic rod of a bag opening cylinder can simultaneously drive the two bag-holding plates and the two bag clamping mechanisms to move simultaneously, and simultaneously open or close from four directions. In this way, on the one hand, the entire structure is simple and reliable, and the opening amplitude is determined and will not change due to long-term use, which solves the problem of material leakage caused by the smaller opening amplitude of the bag mouth on one side due to long-term use. On the other hand, the opening frequency of the entire device in all directions is completely determined by the action frequency of a single bag opening cylinder, and there will be no synchronization delay, which is more convenient to match with the overall production rhythm of the existing automatic packaging machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view structural schematic diagram of a preferred embodiment of the present invention;

[0012] Figure 2 It is a schematic diagram of the blanking structure of the front view structural diagram shown

[0013] Figure 3 is a schematic diagram of the driving structure of the front view structural schematic diagram shown;

[0014] Figure 4 This is the schematic diagram of the bag clamping structure in the driving structure diagram shown

[0015] Figure 5 is a schematic diagram of the side structure of the illustrated embodiment;

[0016] Figure 6 It is a schematic diagram of the blanking structure of the side view structural schematic diagram shown;

[0017] Figure 7 is a schematic diagram of the driving structure of the side view structural diagram shown;

[0018] Figure 8 It is a schematic diagram of the top view of the structure of taking out the lower hopper of the invention;

[0019] Fig. 9 It is a schematic diagram of the structure of the material unloading position in the top view structural diagram shown;

[0020] Fig.10 is a schematic diagram of the driving structure in the top view structural diagram shown;

[0021] The markings of the components in the accompanying drawings are as follows:

[0022] 1. Lower hopper, 2. Discharge protection cover, 3. Bag support mechanism, 4. Frame, 5. Bag clamping mechanism, 6.

[0023] Bag opening cylinder, 7. Four-way synchronous opening and closing mechanism, 8. Cylinder frame, 9. Export positioning support plate, 10. Guard plate positioning frame, 11. Lifting position;

[0024] 301. Bag support board, 302. Rocking board, 303. Rotating shaft, 304. Low-position hanger;

[0025] 401. First auxiliary bracket, 402. Second auxiliary bracket, 403. First lever seat, 404.

[0026] The second lever seat, 405. the lifting plate;

[0027] 501. Bag clamping cylinder, 502. Converter, 503. Clamp, 504. Lifting joint;

[0028] 701. first linkage lever, 702. long horizontal push rod, 703. short horizontal push rod, 704. left transmission shaft, 705. right transmission shaft, 706. left rocker arm, 707. right rocker arm, 708. linkage push rod, 709. second linkage lever, 7010. long longitudinal push rod, 7011. short longitudinal push rod. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0030] See also Figures 1 to 10 , the embodiment of the present invention includes:

[0031] A bag clamping and bag opening linkage device for an open-mouth bag, comprising: a lower hopper 1, a frame 4, a bag opening cylinder 6, a bag clamping mechanism 5, a bag supporting mechanism 3 and a four-way synchronous opening and closing mechanism 7; an outlet positioning support plate 9 is installed at the bottom of the frame 4, a material passing hole is provided in the middle of the outlet positioning support plate 9, the lower hopper 1 is installed on the outlet positioning support plate 9, and the material passing hole is aligned with the discharge port of the lower hopper 1,

[0032] The bag supporting mechanism 3 includes two bag supporting plates 301 and two low-position hangers 304. The two low-position hangers 304 are symmetrically installed on the front and rear sides below the material passing hole of the outlet positioning support plate 9. A rotating shaft 303 is provided in the middle of each low-position hanger 304. The bag supporting plate 301 is installed on the rotating shaft 303 of the corresponding low-position hanger 304 and can rotate with the rotating shaft 303. A rocking plate 302 is provided on each rotating shaft 303. When the rocking plate 302 is pushed, the corresponding bag supporting plate 301 can be driven to rotate accordingly.

[0033] Two lifting plates 405 are symmetrically installed on the top of the frame 4 with respect to the lower hopper 1, and a lifting position 11 is set on each lifting plate 405, which are respectively a left lifting position and a right lifting position. There are two bag clamping mechanisms 5, which are symmetrically lifted on the two lifting positions 11, and each bag clamping mechanism 5 includes a bag clamping cylinder 501 and a chuck 503. The tail end of the bag clamping cylinder 501 is provided with a lifting joint 504, and an action converter 502 is provided between the telescopic rod of the bag clamping cylinder 501 and the chuck 503. A transmission shaft is installed on each lifting position 11, and the lifting joint 504 is installed on one end of the corresponding transmission shaft close to the center line of the feeding hole, and a rocker arm is installed on the other end of the transmission shaft. The transmission shaft is the left transmission shaft 704, the corresponding rocker arm is the left rocker arm 706, the transmission shaft on the right lifting position is the right transmission shaft 705, the corresponding rocker arm is the right rocker arm 707, and when the corresponding rocker arm is pushed, the corresponding bag clamping cylinder 5 can be driven to rotate simultaneously by the rotation of the corresponding transmission shaft; the bag opening cylinder 6 is installed on the cylinder seat 8 on the outer rear side of the frame, and two auxiliary brackets are installed on the side of the frame 4, namely the first auxiliary bracket 401 and the second auxiliary bracket 402, the first auxiliary bracket 401 is installed on the side of the frame 4, the first auxiliary bracket 401 is provided with a first lever seat 403, the second auxiliary bracket 402 is installed on the front of the frame 4, and the second auxiliary bracket 402 is provided with a second lever seat 404;The four-way synchronous opening and closing mechanism 7 includes a first linkage lever 701, a second linkage lever 709, a linkage push rod 708, a transverse push rod, and a longitudinal push rod. The first linkage lever 701 is installed on the first lever seat 403, and the second linkage lever 709 is installed on the second lever seat 704. One end of the first linkage lever 701 is the action input end, which is connected to the end of the telescopic rod of the bag opening cylinder 6, and the other end is connected to the second linkage lever 709 through the linkage push rod 708. There are two transverse push rods, which are arranged in parallel on both sides of the first linkage lever 701, namely a long transverse push rod 702 and a short transverse push rod 703. The end of the long transverse push rod 702 is hinged to the left rocker arm 706 which can drive the left bag clamping mechanism 5 away from the first linkage lever 701 to rotate. The end of the short horizontal push rod 703 is hinged to the right rocker arm 707 which can drive the right bag clamping mechanism 5 closer to the first linkage lever 701 to rotate. A push handle is provided in the middle of the second linkage lever 709. The linkage push rod 708 is connected to the push handle and can push the second linkage lever 709 to rotate around the second lever seat 404. Two longitudinal push rods are arranged in parallel at both ends of the second linkage lever 709. One of the two longitudinal push rods is a longitudinal long push rod 7010 and the other is a longitudinal short push rod 7011. The end of the long longitudinal push rod 7010 is hinged to the rocker plate 302 on the bag supporting mechanism 3 which can drive the rear bag supporting plate 301 to rotate around the corresponding rotating shaft 303. The end of the short longitudinal push rod 3011 is hinged to the rocker plate 302 on the bag supporting mechanism 3 which can drive the front bag supporting plate 301 to rotate around the corresponding rotating shaft 303. In this way, two of the four action output ends of the four-way synchronous opening and closing mechanism 7 are respectively connected to the two bag-holding plates 301 at the same time, and two are respectively connected to the two bag-clamping cylinders 501 at the same time. In this way, when the telescopic rod of the bag-opening cylinder 6 is extended, the two bag-holding mechanisms 3 and the two bag-clamping mechanisms 5 are relatively closed at the same time, and when the telescopic rod of the bag-opening cylinder 6 is retracted, the two bag-holding mechanisms 3 and the two bag-clamping structures 5 are simultaneously opened to complete the bag-opening action. ;

[0034] A discharge protection cover 2 is also provided on the outside of the discharge hole of the outlet positioning support plate 9, and the discharge protection cover 2 and the outlet positioning support plate 9 are fixed to the outside of the discharge hole through a guard plate positioning frame 10, and the bag support plate 301 is installed on the inside of the protection cover 2 and the longitudinal length of the bag support plate 301 is greater than the longitudinal length of the discharge protection cover 2. In this way, the material can be prevented from falling out of the bag during unloading, which reduces waste and does not affect the bag opening function of the bag support plate 30.1.

[0035] The working principle of the present invention is as follows:

[0036] In actual use, the open-mouth bag is first sent to the bottom of the bag clamping mechanism 5 in a closed state by the bag loading mechanism, and the two bag clamping cylinders 501 simultaneously drive the clamps 503 to clamp the two sides of the bag opening. At this time, the top ends of the two bag-supporting plates 301 are also in a closed state and just inserted into the bag opening. Then the telescopic rod of the bag opening cylinder 6 retracts, driving the two bag-supporting plates 301 and the bag clamping mechanism 5 to simultaneously open outwards until the bag opening of the open-mouth bag is larger than the size of the discharge hole on the outlet positioning support plate 9, and then the material is unloaded. After the unloading is completed, the telescopic rod of the bag opening cylinder 6 is extended, so that the two bag-supporting plates 301 and the bag clamping mechanism 5 are closed at the same time, and the bag opening of the open-mouth bag is retracted before being sent to the next process.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An open bag clamping and opening linkage device, characterized in that: The open-mouth bag clamping and opening linkage device comprises: a lower hopper, a frame, a bag opening cylinder, a bag clamping mechanism, a bag supporting mechanism and a four-way synchronous opening and closing mechanism; An outlet positioning support plate is installed at the bottom of the frame, a feeding hole is provided in the middle of the outlet positioning support plate, the lower hopper is installed on the outlet positioning support plate, the feeding hole is aligned with the discharge port of the lower hopper, the bag support mechanism includes two bag support plates, which are rotatably and symmetrically installed at the front and rear sides below the feeding hole, and two hanging plates are symmetrically installed on the top of the frame about the lower hopper, and a hanging position is provided under each hanging plate, and there are two bag clamping mechanisms, which are symmetrically hung on the two hanging positions respectively; The bag opening cylinder is installed on the outer side of one side of the frame, and the four-way synchronous opening and closing mechanism is arranged on the basis of the frame. The telescopic rod of the bag opening cylinder is connected to the action input end of the four-way synchronous opening and closing mechanism. There are four action output ends of the four-way synchronous opening and closing mechanism, two of which are respectively connected to two bag-holding plates, and two are simultaneously connected to two bag-clamping mechanisms. Through the four-way synchronous opening and closing mechanism, the telescopic action of the telescopic rod of the bag opening cylinder can simultaneously drive the bag-holding plates of the two bag-holding mechanisms and the two bag-clamping mechanisms to be opened or closed at the same time.

2. The open-mouth bag clamping and opening linkage device according to claim 1, characterized in that: A discharge protection cover is also provided on the outer side of the discharge hole of the outlet positioning support plate, the bag support plate is installed on the inner side of the protection cover, and the longitudinal length of the bag support plate is greater than the longitudinal length of the discharge protection cover.

3. The open-mouth bag clamping and opening linkage device according to claim 1, characterized in that: An auxiliary bracket is installed on the side of the frame, and the four-way synchronous opening and closing mechanism is installed on the frame relying on the auxiliary bracket.

4. The open-mouth bag clamping and opening linkage device according to claim 3, characterized in that: There are two auxiliary brackets, namely the first auxiliary bracket and the second auxiliary bracket. The first auxiliary bracket is provided with a first lever seat, and the second auxiliary bracket is provided with a second lever seat. The four-way synchronous opening and closing mechanism includes a first linkage lever, a second linkage lever, a linkage push rod, a transverse push rod, and a longitudinal push rod. The first linkage lever is installed on the first lever seat, and the second linkage lever is installed on the second lever seat. One end of the first linkage lever is connected to the end of the telescopic rod of the bag opening cylinder, and the other end is connected to the second linkage lever through the linkage push rod. There are two transverse push rods, which are arranged in parallel. On both sides of the first linkage lever, there are a long transverse push rod and a short transverse push rod respectively. The long transverse push rod is connected to the bag clamping mechanism far away from the first linkage lever, and the short transverse push rod is connected to the bag clamping mechanism close to the first linkage lever. A push handle is provided in the middle of the second linkage lever. The linkage push rod is connected to the push handle and can push the second linkage lever to rotate around the second lever seat. Two longitudinal push rods are arranged in parallel at both ends of the second linkage lever, one of the two longitudinal push rods is a long longitudinal push rod, and the other is a short longitudinal push rod. The long longitudinal push rod and the short longitudinal push rod are respectively connected to the bag holding mechanism on the front and rear sides.

5. The open-mouth bag clamping and opening linkage device according to claim 1, characterized in that: The bag-supporting mechanism also includes two low-position hangers, which are symmetrically installed on the front and rear sides of the material passing hole of the outlet positioning support plate. A rotating shaft is provided in the middle of the low-position hanger, and the bag-supporting plate is installed on the rotating shaft and can rotate with the rotating shaft. A rocking plate is provided on each rotating shaft, and the end of the longitudinal push rod is hinged to the rocking plate on the corresponding rotating shaft.

6. The open-mouth bag clamping and opening linkage device according to claim 1, characterized in that: The bag clamping mechanism comprises a bag clamping cylinder and a clamping head. The tail end of the bag clamping cylinder is provided with a hanging joint. An action converter is provided between the telescopic rod of the bag clamping cylinder and the clamping head. A transmission shaft is provided, and the hanging joint is installed at one end of the corresponding transmission shaft close to the center line of the feeding hole. A rocker arm is installed at the other end of the transmission shaft, and the rocker arm is hinged to the lateral push rod on the corresponding side.

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