Bag film folding mechanism, bag making machine and traditional Chinese medicine formula granule dispensing equipment

Abstract

The utility model discloses a bag film folding mechanism, a bag making machine and traditional Chinese medicine formula granule dispensing equipment, the bag film folding mechanism comprises an ejector rod, the ejector rod can push the middle area of one side of a bag film in the process that the bag film moves in the preset direction, and the middle area of the other side of the bag film is opened. And the single-layer bag film can be overturned into a double-layer bag film based on the pushing of the ejector rod in the moving process. When the bag film folding mechanism is applied to the bag making machine, the bag making machine has the function of automatically folding the bag film, so that the bag film which is not folded in advance can be directly used for manufacturing a packaging bag, the purchase cost of the bag film is reduced, and the manufacturing cost of the packaging bag is further reduced to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bag manufacturing, in particular to a bag film folding mechanism, a bag making machine and Chinese medicine formula granule dispensing equipment. Background Art

[0002] The bag making machine is a device that has the ability to make packaging bags on site. It can make bag films into packaging bags of a specific shape, and then transfer the packaging bags to the corresponding conveying mechanism, which moves the packaging bags to complete subsequent actions such as feeding the packaging bags.

[0003] In the existing bag making machines, bags are usually made by using pre-folded bag film. For example, in the bag making machine disclosed in the Chinese patent with the authorization announcement number CN211942310U, the bag film arranged on the folded bag film roll is the folded bag film. When making bags, the folded bag film is wrapped around the film support rod and then sleeved on the forming film plate. Then, the side edges of the bag film are first sealed by the side sealing mechanism, and then the bottom edge of the bag film is sealed and cut by the bottom edge sealing and cutting mechanism, so that the bag film finally forms a raw material bag with three sides sealed.

[0004] The above-mentioned bag making machine can only use pre-folded bag film, and bag film that is not pre-folded cannot be used. The pre-folded bag film is usually formed by the bag film manufacturer folding a single layer of bag film into a double layer in advance, and then rolling it into a roll shape, so the purchase cost is relatively high.

[0005] In this regard, the applicant believes that if the existing bag-making machine can be improved and a folding function can be added, the bag-making machine can directly use the bag film that has not been folded in advance, thereby reducing the purchase cost of the bag film and, in turn, reducing the production cost of the packaging bag to a certain extent. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to improve the existing bag making machine so that it can fold the bag film, so that the bag making machine can directly use the bag film that is not folded in advance, thereby reducing the production cost of the packaging bag.

[0007] In order to solve the above technical problems, in the first aspect, the utility model provides a bag film folding mechanism, which includes a push rod, which can push the middle area of ​​one side of the bag film during the movement of the bag film along a predetermined direction, so that the single-layer bag film can be folded into a double-layer bag film based on the pushing of the push rod during the movement.

[0008] The above-mentioned bag film folding mechanism has the following beneficial effects:

[0009] When the bag film moves, the push rod will push the bag film and draw a folding line in the middle area of ​​the bag film along the moving direction of the bag film, so that the single-layer bag film is folded into a double-layer bag film based on the folding line when passing through the push rod.

[0010] Preferably, the bag film folding mechanism also includes a shaping component, which is arranged on the downstream side of the bag film moving direction relative to the push rod. The shaping component has a shaping seam to allow the double-layer bag film folded by the push rod to pass through it and make the two layers of film in the double-layer bag film flat and attached to each other.

[0011] After adding the shaping component, during the movement of the bag film, after being pushed and folded by the push rod, the two layers of the bag film will immediately pass through the shaping seam of the shaping component, and the shaping seam can shape the two folded layers of the film so that the two layers of the film are flat and close to each other. Therefore, under the cooperation of the push rod and the shaping component, the single-layer bag film will be folded first and then shaped immediately, and finally a double-layer bag film with two layers of film flat and close to each other will be formed.

[0012] Preferably, the bag film folding mechanism also includes a guide member, which is arranged on the side of the push rod away from the pushing bag film, and the guide member has two guide grooves, and the two guide grooves are respectively used to define the two side edges of the bag film, so that the side edges of the two layers of film sheets move along a predetermined direction and gradually approach each other during the process of folding the single-layer bag film into a double-layer bag film.

[0013] After adding the above-mentioned guide member, when the single-layer bag film is folded into a double-layer bag film, the two guide grooves of the guide member can guide the two side edges of the bag film, so that the two side edges can gradually approach each other smoothly, preventing the side edges from running off and causing the two side edges to be unable to align with each other, and also preventing the side edges from curling.

[0014] Preferably, the bag film folding mechanism further comprises a bag film frame;

[0015] The bag film rack has a rotation center line, and the bag film rack is used to place the rolled single-layer bag film. After the rolled single-layer bag film is placed on the bag film rack, it can rotate based on the rotation center line;

[0016] The push rod is arranged at a predetermined distance from the bag film frame, and the push rod corresponds to the middle area of ​​the bag film frame and is perpendicular to the rotation center line.

[0017] Preferably, the bag film folding mechanism also includes a first guide roller, which is parallel to the rotation center line and arranged at a predetermined distance from the rotation center line, so as to guide the bag film released from the bag film rack so that the bag film can move toward the direction close to the top rod.

[0018] Preferably, a rod tail end of the push rod corresponds to the first guide roller, and a rod head end of the push rod extends in a direction corresponding to the rotation center line.

[0019] In a second aspect, the utility model further provides a bag making machine, which is provided with the bag film folding mechanism described in any one of the above items.

[0020] After the bag film folding mechanism is applied to the bag making machine, the bag making machine has the function of automatically folding the bag film, so that the bag film that has not been folded in advance can be directly used to make packaging bags, reducing the purchase cost of the bag film and thus reducing the production cost of the packaging bags to a certain extent.

[0021] Preferably, the bag making machine further comprises a forming film plate, a side sealing mechanism, a bottom sealing mechanism, a cutting knife and a traction mechanism;

[0022] The molded film plate is arranged on the downstream side of the bag film moving direction relative to the bag film folding mechanism, and the molded film plate is used to separate the two layers of the double-layer bag film and cover the outer surface of the molded film plate in the form of a single layer;

[0023] The side sealing mechanism is arranged on the side of the molded film plate, and is used to make the sides of the two layers of film sheets covering the outer surface of the molded film plate fit together to form a side seal;

[0024] The bottom sealing mechanism is arranged at the downstream side of the bag film moving direction relative to the side sealing mechanism, and the bottom sealing mechanism is used to perform transverse sealing on the bag film that has formed the side seal and reached a predetermined length;

[0025] The cutter can cut the bag film near the transverse seal during the period when the bottom sealing mechanism forms the transverse seal, so as to obtain a packaging bag with one side open and the other side and all sides closed;

[0026] The traction mechanism applies a force to the bag film to pull the bag film to move along a predetermined direction.

[0027] When the above-mentioned bag making machine is working, the traction mechanism pulls the bag film to move, so that the single-layer bag film is released from the bag film frame, and then folded into a double-layer bag film when passing through the top rod, the guide member and the shaping component, and then moved to the forming film plate and covered on the outer surface of the forming film plate in the form of a single layer. Subsequently, driven by the traction mechanism, the bag film will first form a lateral seal through the side sealing mechanism, and then the bag film of a predetermined length and that has completed the lateral seal will be transversely sealed through the bottom sealing mechanism. During this period, the cutter will cut the bag film near the transverse seal, and finally a packaging bag with an open side and closed on the other side and all sides can be obtained.

[0028] Preferably, the number of the bag film folding mechanism, the forming film plate and the cutting knife are all two;

[0029] The two bag film folding mechanisms are arranged at intervals;

[0030] The two molded film plates are spaced a predetermined distance apart and arranged side by side;

[0031] The side sealing mechanism can simultaneously allow the bag films respectively wrapped on the outer surfaces of the two forming film plates to form the side seals;

[0032] The bottom sealing mechanism can simultaneously perform the transverse sealing on two bag films that have formed the side seals and reached a predetermined length; and while the bottom sealing mechanism simultaneously performs the transverse sealing on the two bag films, the two cutters will cut the two bag films respectively;

[0033] The traction mechanism can apply a force to the two bag films simultaneously, so as to pull the two bag films to move in a predetermined direction simultaneously.

[0034] Thus, the bag making machine can make two packaging bags at the same time when it is working.

[0035] In a third aspect, the utility model also provides a Chinese medicine formula granule dispensing device, which is provided with any one of the bag making machines described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a bag film folding mechanism provided in an embodiment of the utility model;

[0037] Figure 2 is Figure 1 The structure is shown after removing the bag film and other parts;

[0038] Figure 3 yes Figure 1 Schematic diagram of the bag film folding mechanism when it is working;

[0039] Figure 4 yes Figure 3 A front view of

[0040] Figure 5 It is a structural schematic diagram of a bag making machine provided by an embodiment of the utility model;

[0041] Figure 6 yes Figure 5 A front view of

[0042] Figure 7 yes Figure 5 Schematic diagram of the structure of the middle forming membrane plate and other components;

[0043] Figure 8 The bag film is wrapped in Figure 7 A schematic diagram of the outer surface of the molded membrane plate;

[0044] Fig. 9 yes Figure 5 Structural diagram of the middle and side sealing mechanism, traction mechanism and other components;

[0045] Fig.10 yes Fig. 9 A front view of

[0046] Fig.11 yes Fig. 9 An isolated view of some components of the middle side sealing mechanism;

[0047] Fig.12 yes Figure 5 Schematic diagram of the structure of the middle bottom sealing mechanism and the cutter. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below in conjunction with specific embodiments, but the implementation methods of the present invention are not limited thereto.

[0049] See also Figures 1 to 4 The utility model provides a bag film folding mechanism 100, which includes a push rod 110. Figure 3 and Figure 4 The push rod 110 can push the middle area of ​​one side of the bag film a when the bag film a moves along a predetermined direction, so that the single-layer bag film can be folded into a double-layer bag film based on the pushing of the push rod 110 during the movement.

[0050] The above-mentioned bag film folding mechanism also includes a shaping component 140, which is arranged on the downstream side of the bag film moving direction relative to the top rod 110. The shaping component 140 has a shaping seam 14a, which is used to allow the double-layer bag film folded by the top rod 110 to pass through it and make the two layers of film in the double-layer bag film flat and attached to each other.

[0051] For details, see Figure 1 The shaping component 140 includes two limiting rods 141, which are arranged side by side and form the shaping gap 14a therebetween.

[0052] When the bag film is moving, after being pushed and folded by the push rod 110, the two layers of the bag film will immediately pass through the shaping slit 14a of the shaping component 140, and the shaping slit 14a can shape the two layers of the folded film so that the two layers of the film are flat and close to each other. Therefore, under the cooperation of the push rod 110 and the shaping component 140, the single-layer bag film will be folded first and then shaped immediately, and finally a double-layer bag film with two layers of film flat and close to each other is formed.

[0053] The above-mentioned bag film folding mechanism also includes a guide member 160, which is arranged on the side of the push rod 110 away from the pushing bag film, and the guide member 160 has two guide grooves 161, and the two guide grooves 161 are respectively used to define the two side edges of the bag film, so that the side edges of the two layers of film sheets move along a predetermined direction and gradually approach each other during the process of folding the single-layer bag film into a double-layer bag film.

[0054] For details, see Figure 2 The guide member 160 is fixed on the side of the push rod 110 away from the push bag film (i.e., the side of the rod tail), and the guide member 160 is provided with a guide groove 161 on the left and right sides of the rod tail of the push rod 110, and the two guide grooves 161 are roughly distributed in an inverted V shape.

[0055] With the above-mentioned guide member 160, when the single-layer bag film is folded into a double-layer bag film, the two guide grooves 161 of the guide member 160 can guide the two side edges of the bag film, so that the two side edges can be gradually approached smoothly, preventing the side edges from deviating and causing the two side edges to be unable to align with each other, and also preventing the side edges from curling.

[0056] The bag film folding mechanism further includes a bag film frame 120, the bag film frame 120 having a rotation center line 12a, and the bag film frame 120 is used to place the rolled single-layer bag film, and the rolled single-layer bag film can be rotated based on the rotation center line 12a after being placed on the bag film frame 120. The push rod 110 is arranged at a predetermined distance from the bag film frame 120, and the push rod 110 corresponds to the middle area of ​​the bag film frame 120 and is perpendicular to the rotation center line 12a.

[0057] For details, see Figure 2 The bag film frame 120 has a support rod 121, the axis of the support rod 121 is the rotation center line 12a, and a mounting plate 122 is provided on both sides of the support rod 121. The mounting plate 122 can rotate relative to the support rod 121. A positioning ring 123 is provided inside the mounting plate 122, and the two ends of the support rod 121 are respectively clamped on two first mounting plates 124.

[0058] When placing the rolled single-layer bag film, just clamp the two ends of the central tube of the bag film on the two positioning rings 123 respectively. The effect after installation is as follows: Figure 1 As shown, after installation, the rolled single-layer bag film a can rotate around the rotation center line 12a.

[0059] The rolled single-layer bag film can be purchased from a bag film manufacturer, and its structure is: a single-layer bag film is coiled around a central tube and rolled on the central tube.

[0060] The above-mentioned bag film folding mechanism also includes a first guide roller 131, which is parallel to the rotation center line 12a and is arranged at a predetermined distance from the rotation center line 12a. The first guide roller 131 is used to guide the bag film a released from the bag film frame 120, so that the bag film a can bypass the first guide roller 131 and move toward the direction close to the top rod 110.

[0061] For details, see Figure 2 Both ends of the first guide roller 131 are rotatably mounted on two second mounting plates 132 via a bearing respectively.

[0062] In addition, in order to enable the bag film a released from the bag film frame 120 to move closely against the first guide roller 131, see Figure 2 In a preferred embodiment, a gear rod 133 is further provided on the side of the first guide roller 131, and the two ends of the gear rod 133 are respectively connected to the two second mounting plates 132, and there is a gap between the gear rod 133 and the first guide roller 131. The spacing of the gap is small, which is used to limit the bag film a passing through the gap to be in close contact with the first guide roller 131, so that when the bag film a moves, the first guide roller 131 can not only guide the bag film a, but also rotate with the movement of the bag film a, and there is rolling friction between the bag film a and the first guide roller 131.

[0063] Preferably, a tail end of the push rod 110 corresponds to the first guide roller 131, and a head end of the push rod 110 extends in a direction corresponding to the rotation center line 12a.

[0064] See also Figure 1 In the figure, the first guide roller 131 is located on the upper right side of the rotation centerline 12a, and the top rod 110 is located above the first guide roller 131, wherein the tail end of the top rod 110 corresponds to the first guide roller 131, and the head end of the rod extends in the direction corresponding to the rotation centerline 12a, that is, the tail end of the top rod 110 is roughly located directly above the first guide roller 131, and the head end of the rod is roughly located directly above the rotation centerline 12a after being laterally extended, that is, the tail end of the rod and the head end are respectively located above the first guide roller 131 and the rotation centerline 12a.

[0065] One end of the rod head of the push rod 110 extends in a direction corresponding to the rotation center line 12a, and its purpose is to enable the middle area of ​​the bag film a to be pushed to one side by the rod head of the push rod 110 when the bag film a passes through the push rod 110 (that is, to make the bag film a move to the side). Figure 3 The left side of the bag is offset in the middle), so that the single-layer bag film is offset by a certain distance first, and then folded in the center in the opposite direction to form a double-layer bag film.

[0066] Preferably, the above-mentioned bag film folding mechanism also includes a second guide roller 150, which is parallel to the top rod 110 and is arranged on the side of the shaping component 140 away from the top rod 110. The second guide roller 150 is used to guide the double-layer bag film after passing through the shaping seam 14a so that it leaves the bag film folding mechanism.

[0067] Based on the above-mentioned bag film folding mechanism, the utility model also provides a bag making machine, which is provided with the above-mentioned bag film folding mechanism 100.

[0068] See also Figure 5 and Figure 6 In addition to the bag film folding mechanism 100, the bag making machine also includes a forming film plate 210, a side sealing mechanism 300, a bottom sealing mechanism 400, a cutter 500 and a traction mechanism 600.

[0069] The forming film plate 210 is arranged on the downstream side of the bag film moving direction relative to the bag film folding mechanism 100. The forming film plate 210 is used to separate the two film sheets of the double-layer bag film and cover the outer surface of the forming film plate 210 in the form of a single layer.

[0070] The side sealing mechanism 300 is arranged beside the molded film plate 210 , and is used to make the sides of the two layers of film sheets covering the outer surface of the molded film plate 210 fit together to form a side seal.

[0071] The bottom sealing mechanism 400 is arranged at the downstream side of the side sealing mechanism 300 in the moving direction of the bag film, and is used to perform transverse sealing on the bag film that has formed the side seals and has reached a predetermined length.

[0072] The cutter 500 can cut the bag film near the transverse seal when the bottom sealing mechanism 400 forms the transverse seal, so as to obtain a packaging bag with one side open and the other side and all sides closed.

[0073] The traction mechanism 600 applies a force to the bag film to pull the bag film to move along a predetermined direction.

[0074] In a preferred embodiment, see Figure 5 and Figure 6, the number of the bag film folding mechanism 100, the forming film plate 210 and the cutter 500 are all two. The two bag film folding mechanisms 100 are arranged at intervals. The two forming film plates 210 are arranged side by side at a predetermined distance. The side sealing mechanism 300 can simultaneously allow the bag films respectively wrapped on the outer surfaces of the two forming film plates 210 to form the side seals. The bottom sealing mechanism 400 can simultaneously perform the transverse sealing on the two bag films that have formed the side seals and reached a predetermined length, and while the bottom sealing mechanism 400 is performing the transverse sealing on the two bag films at the same time, the two cutters 500 will cut the two bag films respectively. The traction mechanism 600 can simultaneously apply a force to the two bag films to pull the two bag films to move simultaneously in a predetermined direction.

[0075] For details, see Figure 5 and Figure 6 , two bag film folding mechanisms 100 are arranged on a bottom plate 900, one on the left and one on the right, wherein two first mounting plates 124 are vertically fixed on the bottom plate 900, the support rod 121 is parallel to the surface of the bottom plate 900, the two second mounting plates 132 are also vertically fixed on the bottom plate 900, the first guide roller 131 and the gear rod 133 are both parallel to the surface of the bottom plate 900, and the top rod 110, the two limit rods 141 and the second guide roller 150 are all vertically fixed relative to the bottom plate 900.

[0076] Two forming film plates 210 are vertically installed in the middle of the two bag film folding mechanisms 100, and a third guide roller 710 is arranged below each forming film plate 210. After the double-layer bag film leaves the second guide roller 150, it moves downward and then bypasses the third guide roller 710, and then moves upward, and then the two layers of the double-layer bag film are separated and then coated on the outer surface of the forming film plate 210 in the form of a single layer.

[0077] Preferably, see Figure 7 The outer periphery of the molded film plate 210 is provided with two limiting rings 220 at intervals. The limiting rings 220 are shaped steel wires. The direction of the shaped steel wires matches the outer contour of the molded film plate 210, and the spacing distance between the shaped steel wires and the outer wall of the molded film plate 210 is substantially constant. Figure 8 When the bag film a is coated on the outer surface of the forming film plate 210, the limiting ring 220 plays a limiting role, which can improve the fit between the bag film a and the outer surface of the forming film plate 210 and prevent the bag film a from becoming loose.

[0078] Also, see Figure 7 or Figure 8 The bottom area of ​​the molding film plate 210 is also provided with a limiting guide plate 230, which can play a guiding role when the bag film a covers the molding film plate 210 and make the side edges of the two layers of the bag film a tend to fit together.

[0079] Preferably, see Fig. 9 and Fig.10 The side sealing mechanism 300 includes two first heating strips 310 and a first pad 320. The first pad 320 is fixed on the bottom plate 900 between the two molding film plates 210. The two first heating strips 310 are respectively located on the left and right sides of the first pad 320, and the two first heating strips 310 can move toward or away from each other at the same time.

[0080] See also Fig. 9 When the two bag films a are respectively covered on the outer surfaces of the two forming film plates 210, the side edges of the two layers of film sheets of one bag film a are close to the vertical edge on the left side of the first pad 320, and the side edges of the two layers of film sheets of the other bag film a are close to the vertical edge on the right side of the first pad 320. When the two first heating strips 310 move toward each other at the same time, the side edges of the two bag films a can be clamped respectively (clamped between the vertical edges of the first heating strips 310 and the first pad 320), and then the side edges of the two bag films a are heated so that the side edges of the two layers of film sheets of the bag film a are heat-sealed to form the said side seal.

[0081] Specifically, the two first heating strips 310 may be driven to move toward or away from each other by a gear rack assembly, for example:

[0082] See also Fig.11 The side sealing mechanism 300 further includes a first motor 330, a first gear 340, a first rack 350, a first movable plate 360, a first connecting rod 370, a first spring 380 and a first guide rod 390;

[0083] The first motor 330 is fixed on the back side of the bottom plate 900;

[0084] The first gear 340 is fixed on the output shaft of the first motor 330;

[0085] There are two first racks 350 , and the two first racks 350 are meshed on the upper and lower sides of the first gear 340 , and the moving direction of the first racks 350 is parallel to the moving direction of the first heating strip 310 ;

[0086] There are two first movable plates 360 , one of which is fixed to the left end of one of the first racks 350 , and the other first movable plate 360 ​​is fixed to the right end of the other first rack 350 ;

[0087] There are four first connecting rods 370, two of which are arranged at intervals and one end of which is inserted into one of the first movable plates 360, and the other end is fixed to one of the first heating strips 310, and the other two first connecting rods 370 are also arranged at intervals and one end of which is inserted into another first movable plate 360, and the other end is fixed to another first heating strip 310; and the extension direction of each first connecting rod 370 is parallel to the moving direction of the first heating strip 310, and at the same time, each first connecting rod 370 can move back and forth relative to the corresponding first movable plate 360 ​​and cannot fall off the first movable plate 360;

[0088] There are four first springs 380 , each of which is sleeved on each of the first connecting rods 370 . One end of the first spring 380 abuts against the corresponding first movable plate 360 ​​, and the other end abuts against the corresponding first heating strip 310 .

[0089] There are two first guide rods 390, and the extension directions of the two first guide rods 390 are parallel to the moving direction of the first heating strip 310. The two first guide rods 390 are arranged at intervals and fixed relative to the bottom plate 900, and the two first guide rods 390 pass through the two first movable plates 360 at the same time, so that the two first movable plates 360 can only move along the first guide rods 390;

[0090] Thus, when the first motor 330 is started, the first gear 340 can drive the two first racks 350 to move toward or away from each other, and the movement of the two first racks 350 toward or away from each other can drive the two first heating strips 310 to move toward or away from each other through the first movable plate 360, the first connecting rod 370 and the first spring 380;

[0091] Among them, since the first connecting rod 370 can move back and forth relative to the first movable plate 360, and the first connecting rod 370 is sleeved with the first spring 380, and the first spring 380 is abutted between the first movable plate 360 ​​and the first heating strip 310, when the two first heating strips 310 move toward each other, when the vertical edges of the first heating strip 310 and the first pad 320 are in contact, the two are in elastic contact, and the elastic contact can avoid the rigid collision between the first heating strip 310 and the first pad 320 during side sealing, and the elastic contact can also improve the sealing molding effect.

[0092] Of course, in addition to the above-mentioned gear rack assembly, other components such as a cylinder or a screw rod may also be used to drive the two first heating strips 310 to move toward or away from each other.

[0093] Preferably, see Fig.12The bottom sealing mechanism 400 includes two second heating strips 410 and two second pads 420. The two second pads 420 correspond to the two second heating strips 410 respectively and are fixed relative to the bottom plate 900. The two second heating strips 410 can move toward or away from each other at the same time.

[0094] Specifically, the two second heating strips 410 may be driven to move toward or away from each other by a gear rack assembly, for example:

[0095] See also Fig.12 The bottom sealing mechanism 400 further includes a second motor 430, a second gear 440, a second rack 450, a second movable plate 460, a second connecting rod 470, a second spring and a second guide rod 490;

[0096] The second motor 430 is fixed on the base plate 900;

[0097] The second gear 440 is fixed on the output shaft of the second motor 430; and the second gear 440 is located beside one of the second heating strips 410;

[0098] There are two second racks 450 , which are meshed one behind the other at the front and rear sides of the second gear 440 , and the moving direction of the second racks 450 is parallel to the moving direction of the second heating strip 410 ;

[0099] There are two second movable plates 460, one of which is located on the left side of one of the second heating bars 410 and fixed to one of the second racks 450, and the other second movable plate 460 is located on the right side of the other second heating bar 410 and fixed to the other second rack 450 via a connecting member 480;

[0100] The number of the second connecting rods 470 is four, wherein two second connecting rods 470 are arranged at intervals and one end of the second connecting rods 470 is inserted into one of the second movable plates 460, and the other end is fixed to one of the second heating strips 410, and the other two second connecting rods 470 are also arranged at intervals and one end of the second connecting rods 470 is inserted into another second movable plate 460, and the other end is fixed to another second heating strip 410; and the extension direction of each second connecting rod 470 is parallel to the moving direction of the second heating strip 410, and at the same time, each second connecting rod 470 can move back and forth relative to the corresponding second movable plate 460 and cannot fall off the second movable plate 460;

[0101] The number of the second springs (not shown in the figure) is four, each second spring is respectively mounted on one end of each second connecting rod 470 inserted into the second movable plate 460, and one end of the second spring abuts against the end surface of the second connecting rod 470, and the other end abuts against the end surface of the countersunk hole of the second movable plate 460 for the second connecting rod 470 to be inserted;

[0102] There are two second guide rods 490, and the extension direction of the two second guide rods 490 is parallel to the moving direction of the second heating strip 410. The two second guide rods 490 are arranged at intervals and fixed relatively to the bottom plate 900 through two mounting frames 40a, and the two second guide rods 490 pass through the two second movable plates 460 at the same time, so as to limit the two second movable plates 460 to move only along the second guide rods 490;

[0103] The two second pads 420 are fixed on the second guide rod 490 between the two second heating strips 410, and the gap between the second pads 420 and the corresponding second heating strips 410 is for the bag film a to pass through;

[0104] Thus, when the second motor 430 is started, the second gear 440 can drive the two second racks 450 to move toward or away from each other, and the movement of the two second racks 450 toward or away from each other can drive the two second heating strips 410 to move toward or away from each other through the connecting member 480, the second movable plate 460, the second spring and the second connecting rod 470;

[0105] Among them, since the second connecting rod 470 can move back and forth relative to the second movable plate 460, and a second spring is provided at the rear end of the second connecting rod 470, when the two second heating strips 410 move toward each other until the second heating strip 410 contacts the second pad 420, the two are in elastic contact. The elastic contact can avoid a rigid collision between the second heating strip 410 and the second pad 420 during transverse sealing, and the elastic contact can also improve the sealing molding effect.

[0106] Of course, in addition to the above-mentioned gear rack assembly, other components such as a cylinder or a screw rod may also be used to drive the two second heating strips 410 to move toward or away from each other.

[0107] Preferably, see Fig.12The two cutters 500 are respectively arranged below the two second heating strips 410, and the cutters 500 are fixed to the corresponding second movable plates 460. In the initial state, the distance between the cutter 500 and the second pad 420 is slightly farther than the distance between the second heating strip 410 above it and the second pad 420. When the two second heating strips 410 move toward each other, the two second heating strips 410 will first contact the corresponding second pad 420. Then, as the second movable plate 460 continues to move, the second heating strip 410 will retract to the side close to the second movable plate 460 based on the compression of the second spring by the second connecting rod 470. Therefore, the cutter 500 will gradually contact the second pad 420, so that the second heating strip 410 can first form a transverse seal, and then cut the bag film below the transverse seal, thereby obtaining a packaging bag with an open top and closed bottom and four sides.

[0108] Preferably, see Figure 6 The traction mechanism 600 is arranged between the side sealing mechanism 300 and the bottom sealing mechanism 400, and its specific structure can be set as follows:

[0109] Fig. 9 and Fig.10 , the traction mechanism 600 includes two third motors 610, two driving wheels 620 and two driven wheels 630;

[0110] The two third motors 610 are both arranged on the back side of the base plate 900;

[0111] The two driving wheels 620 are arranged on the front side of the bottom plate 900, and the two driving wheels 620 are respectively connected to the output shafts of the two third motors 610;

[0112] The two driven wheels 630 are also arranged at the front side of the bottom plate 900. The two driven wheels 630 are rotatably arranged, and the two driven wheels 630 are respectively located beside the two driving wheels 620, and the outer surfaces of the two driven wheels 630 are respectively pressed against the outer surfaces of the corresponding driving wheels 620.

[0113] During operation, the bag film a after the side sealing is completed will pass between the driving wheel 620 and the driven wheel 630, and the driving wheel 620 and the driven wheel 630 will clamp the side sealing of the bag film a. When the third motor 610 is started, it will drive the driving wheel 620 to rotate, and the driving wheel 620 will drive the driven wheel 630 to rotate synchronously by the tight action with the outer surface of the driven wheel 630, so the bag film a clamped between the driving wheel 620 and the driven wheel 630 will move.

[0114] In order to ensure that the driving wheel 620 and the driven wheel 630 are always in close contact with each other to avoid a gap between them and the bag film a cannot be pulled to move, the following settings can be made:

[0115] See also Fig. 9 and Fig.10 , the traction mechanism 600 further includes a fixed plate 640, a third guide rod 650, a movable plate 660 and a third spring 670;

[0116] The fixing plate 640 is installed on the front side of the bottom plate 900, and the fixing plate 640 is located in the middle of the top area of ​​the two forming film plates 210; and the two driven wheels 630 are rotatably installed on the left and right sides of the front side of the fixing plate 640 respectively;

[0117] There are two third guide rods 650, which are arranged one above the other, and both of them pass through the fixing plate 640 transversely and extend from the left and right sides of the fixing plate 640.

[0118] There are two movable plates 660, which are respectively located on the left and right sides of the fixed plate 640, and each movable plate 660 is sleeved on the two third guide rods 650 and can slide back and forth along the third guide rods 650; and the two third motors 610 are respectively fixed on the two movable plates 660;

[0119] There are four third springs 670, two of which are respectively sleeved on the left and right ends of one of the third guide rods 650, and the other two are respectively sleeved on the left and right ends of another third guide rod 650; and one end of each third spring 670 abuts against the step surface of the corresponding movable plate 660, and the other end abuts against the screw installed at the end of the third guide rod 650;

[0120] Therefore, under the pushing action of the four third springs 670, the two movable plates 660 will move closer to the center, thereby driving the third motor 610 installed on the movable plate 660 and the driving wheel 620 connected to the output shaft of the third motor 610 to move closer to the center, and then the two driving wheels 620 will be elastically pressed against the two driven wheels 630 respectively, thereby ensuring that there is no gap between the two, and they are always pressed against each other, and can smoothly pull the bag film a to move.

[0121] The working principle of the above bag making machine is roughly as follows:

[0122] First, after the rolled single-layer bag film is released from the bag film rack 120, it is first folded into a double-layer bag film by the top rod 110 of the bag film folding mechanism 100, and then passes through the shaping component 140 and bypasses the second guide roller 150 and the third guide roller 710 in sequence, and then wraps around the outer surface of the forming film plate 210, and extends along the forming film plate 210 to the traction mechanism 600, and is clamped by the driving wheel 620 and the driven wheel 630 of the traction mechanism 600;

[0123] After the bag making process is started, the third motor 610 works to drive the driving wheel 620 and the driven wheel 630 to rotate, so as to pull the bag film a clamped between the driving wheel 620 and the driven wheel 630 to move upward; during this period, the rolled single-layer bag film placed on the bag film rack 120 will be released from the bag film rack 120 one by one;

[0124] During the process of the traction mechanism 600 pulling the bag film a to move, when the bag film a above the driving wheel 620 moves to a certain length, the third motor 610 stops working, and the second motor 430 starts to work in the forward direction to drive the second heating strip 410 to move toward the side close to the second pad 420. At this time, the second heating strip 410 will press the bag film a against the second pad 420 and heat it to form a transverse seal on the bag film. During this period, the cutter 500 will also cut off the bag film a below the transverse seal. The bag film a after cutting off is the packaging bag made by the bag making machine (that is, a packaging bag with an opening at the top and closed at the bottom and all around); after cutting off the bag film a, the second motor 430 starts to work in the reverse direction to drive the second heating strip 410 to move toward the side away from the second pad 420, and then the second motor 430 stops working;

[0125] In the above process, when the third motor 610 stops working, the second motor 430 starts working in the forward direction, and the first motor 330 also starts working in the forward direction synchronously. The forward working of the first motor 330 drives the two first heating strips 310 to move toward each other, so that the side edges of the two bag films a can be clamped (clamped between the first heating strips 310 and the vertical edges of the first pad 320), and then the side edges of the bag film a are heated to heat-seal the side edges of the two layers of film of the bag film a to form a side seal; after the side seal is completed, the first motor 330 starts working in the reverse direction to drive the two first heating strips 310 to move back to leave the first pad 320, and then the first motor 330 stops working;

[0126] Afterwards, the above steps are repeated to allow the third motor 610 to work intermittently, and whenever the third motor 610 stops working, the first motor 330 and the second motor 430 complete a forward and reverse rotation process, and whenever the third motor 610 starts working, the first motor 330 and the second motor 430 stop working; this cycle is repeated, and finally, packaging bags with an open top and closed bottom and four sides can be continuously produced.

[0127] From the above, it can be seen that after the bag film folding mechanism 100 is added to the bag making machine, the bag making machine has the function of folding the bag film, so that the bag making machine can directly use the bag film that has not been folded in advance, reducing the purchase cost of the bag film, and further reducing the production cost of the packaging bag to a certain extent.

[0128] In addition, based on the above-mentioned bag-making machine, the utility model also provides a Chinese medicine formula granule dispensing device, and the Chinese medicine formula granule dispensing device is provided with the above-mentioned bag-making machine.

[0129] In the Chinese medicine formula granule dispensing equipment, the packaging bags made by the bag making machine will be placed in the carrying box from bottom to top, and then move with the carrying box. During the movement, when the designated position is reached, the Chinese medicine granules will be dispensed into the packaging bag according to the amount. After the dispensing is completed, the top of the packaging bag will be sealed to form packaged Chinese medicine formula granules.

[0130] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Bag film folding mechanism, characterized in that: The bag film comprises a push rod (110), wherein the push rod (110) can push the middle area of ​​one side of the bag film when the bag film moves along a predetermined direction, so that the single-layer bag film can be folded into a double-layer bag film based on the pushing of the push rod (110) during the movement.

2. The bag film folding mechanism according to claim 1, characterized in that: It also includes a shaping component (140), which is arranged on the downstream side of the bag film moving direction relative to the top rod (110), and the shaping component (140) has a shaping slit (14a) to allow the double-layer bag film folded by the top rod (110) to pass through it and make the two layers of film in the double-layer bag film flat and attached to each other.

3. The bag film folding mechanism according to claim 1 or 2, characterized in that: The bag further comprises a guide member (160), wherein the guide member (160) is arranged on a side of the push rod (110) away from the pushing bag film, and the guide member (160) has two guide grooves (161), and the two guide grooves (161) are respectively used to define two side edges of the bag film, so that the side edges of the two layers of film sheets move along a predetermined direction and gradually approach each other during the process of folding the single-layer bag film into a double-layer bag film.

4. The bag film folding mechanism according to claim 1, characterized in that: Also includes a bag film frame (120); The bag film rack (120) has a rotation center line (12a), and the bag film rack (120) is used to place the rolled single-layer bag film. After the rolled single-layer bag film is placed on the bag film rack (120), it can rotate based on the rotation center line (12a); The push rod (110) is arranged at a predetermined distance from the bag film frame (120), and the push rod (110) corresponds to the middle area of ​​the bag film frame (120) and is perpendicular to the rotation center line (12a).

5. The bag film folding mechanism according to claim 4, characterized in that: It also includes a first guide roller (131), which is parallel to the rotation center line (12a) and is arranged at a predetermined distance from the rotation center line (12a) to guide the bag film released from the bag film frame (120) so that the bag film can move in a direction close to the top rod (110).

6. The bag film folding mechanism according to claim 5, characterized in that: A rod tail end of the push rod (110) corresponds to the first guide roller (131), and a rod head end of the push rod (110) extends in a direction corresponding to the rotation center line (12a).

7. Bag making machine, characterized in that, The bag making machine is provided with the bag film folding mechanism as claimed in any one of claims 1 to 6.

8. The bag making machine according to claim 7, characterized in that: The bag making machine also includes a forming film plate (210), a side sealing mechanism (300), a bottom sealing mechanism (400), a cutting knife (500) and a traction mechanism (600); The forming film plate (210) is arranged on the downstream side of the bag film moving direction relative to the bag film folding mechanism (100), and the forming film plate (210) is used to separate the two film sheets of the double-layer bag film and cover the outer surface of the forming film plate (210) in the form of a single layer; The side sealing mechanism (300) is arranged on the side of the molded film plate (210), and the side sealing mechanism (300) is used to make the side edges of the two layers of film sheets covering the outer surface of the molded film plate (210) fit together to form a side seal; The bottom sealing mechanism (400) is arranged on the downstream side of the bag film moving direction relative to the side sealing mechanism (300), and the bottom sealing mechanism (400) is used to perform transverse sealing on the bag film that has formed the side seal and reached a predetermined length; The cutter (500) can cut the bag film near the transverse seal when the bottom sealing mechanism (400) forms the transverse seal, so as to obtain a packaging bag with one side open and the other side and all sides closed; The traction mechanism (600) applies a force to the bag film to pull the bag film to move along a predetermined direction.

9. The bag making machine according to claim 8, characterized in that: The number of the bag film folding mechanism (100), the forming film plate (210) and the cutting knife (500) are all two; The two bag film folding mechanisms (100) are arranged at intervals; The two molded film plates (210) are spaced a predetermined distance apart and arranged side by side; The side sealing mechanism (300) can simultaneously allow the bag films respectively coated on the outer surfaces of the two forming film plates (210) to form the side seals; The bottom sealing mechanism (400) can simultaneously perform the transverse sealing on two bag films that have formed the side seals and have reached a predetermined length; and while the bottom sealing mechanism (400) is simultaneously performing the transverse sealing on the two bag films, the two cutters (500) will cut the two bag films respectively; The traction mechanism (600) can apply a force to the two bag films simultaneously, so as to pull the two bag films to move in a predetermined direction simultaneously.

10. Chinese medicine formula granule dispensing equipment, characterized in that: The Chinese medicine formula granule dispensing equipment is provided with a bag making machine as described in any one of claims 7 to 9.

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