A pull rod mechanism for a bag holder

Abstract

The present invention provides a pull rod mechanism for a bag holder, belonging to the technical field of bag clamping devices. It solves the problem of inconvenient use of existing bag clamping devices. The pull rod mechanism of a bag holder of the present invention includes a fixed plate, a tension component, an opening component and a power component; wherein, during the operation of the power component, either the opening component or the tension component moves relative to the fixed plate, that is, when the opening component moves relative to the fixed plate and the tension component is stationary relative to the fixed plate, the opening component can be pressed against the clamping part of the holder for clamping the bag; when the tension component moves relative to the fixed plate and the opening component is stationary relative to the fixed plate, the holder can be pulled open, and the clamping part can release its grip on the bag, that is, the holder can release the bag.

Description

Technical Field

[0001] The invention belongs to the technical field of bag clamping equipment and relates to a pull rod mechanism of a bag holder. Background Art

[0002] The bag clamping device can clamp the bag placed inside it to facilitate the subsequent equipment to perform heat sealing on the opening of the bag. However, in the existing technology, most bag clamping devices only have the function of clamping the bag. Once the clamping device is opened, it needs to be manually clamped. This not only wastes time but also makes the workers' operation inefficient. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems in the existing technology and to provide a pull rod mechanism that can automatically open the retainer.

[0004] The object of the present invention can be achieved through the following technical solutions: A pull rod mechanism of a bag holder, comprising:

[0005] Fixed plate;

[0006] A tension component is provided on the fixed plate;

[0007] An opening assembly is provided on the tension assembly, the opening assembly can make the retainer release the bag, and a power member for driving the tension assembly and the opening assembly to move is provided on the fixing plate;

[0008] When the power member is running, the opening assembly moves relative to the fixed plate and the tension assembly remains stationary relative to the fixed plate, or the tension assembly moves relative to the fixed plate and the opening assembly remains stationary relative to the fixed plate.

[0009] In the above-mentioned pull rod mechanism of a bag holder, the pulling assembly includes a lower folding plate arranged on a fixed plate and at least two pulling rods that are movable through the lower folding plate. The two pulling rods are connected by a pulling plate at one end toward the holder, and the other ends of the two pulling rods are connected by a lower connecting plate. A lower driving plate is slidingly provided on the lower folding plate for driving the lower connecting plate to move relative to the lower folding plate.

[0010] In the above-mentioned pull rod mechanism of the bag holder, a lower roller is provided on the bottom surface of the lower connecting plate, and the side surface of the lower roller is attached to the side of the lower driving plate away from the holder. A second oblique edge and a second straight edge are provided on the side of the lower driving plate away from the holder, and a first guide rail is provided on the lower folding plate that is slidably connected to the lower driving plate. A first spring is provided on the tension rod, and the first spring is clamped between the pull plate and the lower folding plate.

[0011] In the above-mentioned pull rod mechanism of a bag holder, the opening assembly includes an upper folding plate connected to the lower folding plate and at least two opening rods that move through the upper folding plate. The two opening rods are connected by an upper connecting plate at one end away from the holder. An upper driving plate is slidingly provided on the upper folding plate for driving the upper connecting plate to move relative to the upper folding plate.

[0012] In the above-mentioned pull rod mechanism of the bag holder, an upper roller is provided on the bottom surface of the upper connecting plate, and the side surface of the upper roller is against the side edge of the upper driving plate close to the holder. The side edge of the upper driving plate close to the holder is provided with a first oblique side corresponding to the second straight side and a first straight side corresponding to the second oblique side.

[0013] In the above-mentioned pull rod mechanism of the bag holder, the upper folding plate is provided with a second guide rail slidingly connected to the upper driving plate, the opening rod is sleeved with a second spring, the second spring is clamped between the upper connecting plate and the upper folding plate, and the upper driving plate is provided with a groove for accommodating the upper connecting plate.

[0014] In the above-mentioned pull rod mechanism of the bag holder, the power member includes a first motor provided on the bottom surface of the fixed plate, the first motor is provided with a first gear, and the upper drive plate and the lower drive plate are both engaged with the first gear.

[0015] In the above-mentioned pull rod mechanism of a bag holder, the holder includes a rear shell and a front shell, the rear shell is provided with at least two holding rods, the holding rods pass through the front shell, and the holding rods are each provided with a third spring, the third spring is clamped between the end of the holding rod away from the rear shell and the front shell, and the front shell is provided with a bending plate that is buckled with the pull plate.

[0016] In the above-mentioned pull rod mechanism of the bag holder, both sides of the front shell are hinged with clamping claws for clamping the bag, and the number of the clamping claws is the same as the number of the opening rods.

[0017] In the above-mentioned pull rod mechanism of the bag holder, each of the clamping jaws is provided with a contact plate and a soft block, and the soft block can be embedded in the front shell. The front shell is provided with a rotating rod, which passes through the clamping jaw. A torsion spring is sleeved on the rotating rod, and one end of the torsion spring is against the clamping jaw, and the other end is against the front shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. During the operation of the power component, one of the opening component and the tension component moves relative to the fixed plate. That is, when the opening component moves relative to the fixed plate and the tension component remains stationary relative to the fixed plate, the opening component can be pressed against the clamping part of the retainer for clamping the bag. When the tension component moves relative to the fixed plate and the opening component remains stationary relative to the fixed plate, the retainer can be pulled to open, and the clamping part releases its grip on the bag, that is, the retainer can release the bag.

[0020] 2. A soft block is provided on each clamping jaw to prevent the clamping jaw from directly contacting the bag, thereby better protecting the bag in the holder.

[0021] 3. The end of the clamping claw with the soft block is embedded into the front shell of the holder, and a torsion spring is set between the clamping claw and the front shell to enable the clamping claw to stably clamp the bag in the holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a preferred embodiment of the present invention.

[0023] Figure 2 It is a structural diagram of the open component.

[0024] Figure 3 It is a structural diagram of the tension component.

[0025] Figure 4 This is the motion state diagram of the upper drive plate and the upper roller.

[0026] Figure 5 It is the motion state diagram of the lower driving plate and the lower roller.

[0027] Figure 6 It is a structural diagram of the front shell.

[0028] Figure 7 It is a structural diagram of the gripper. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1 — Figure 7 As shown, a pull rod mechanism of a bag holder of the present invention includes a fixing plate 100 , a pulling force component 200 , an opening component 300 and a power member 400 .

[0031] The tension component 200 is arranged on the fixed plate 100, and the opening component 300 is arranged on the tension component 200. The opening component 300 can make the retainer 500 loosen the bag. The fixed plate 100 is provided with a power part 400 for driving the tension component 200 and the opening component 300 to move. When the power part 400 is running, the opening component 300 and the tension component 200 choose to move relative to the fixed plate 100, that is, when the opening component 300 moves relative to the fixed plate 100 and the tension component 200 is stationary relative to the fixed plate 100, the opening component 300 can be pressed against the clamping part of the retainer 500 for clamping the bag. When the tension component 200 moves relative to the fixed plate 100 and the opening component 300 is stationary relative to the fixed plate 100, the retainer 500 can be pulled to open, and the clamping part can loosen the clamping of the bag, that is, the retainer 500 can realize the bag clamping function.

[0032] like Figure 1 、 Figure 3 、 Figure 5 As shown, the pulling assembly 200 includes a lower folding plate 210 provided on the fixed plate 100 and at least two pulling rods 220 that are movable through the lower folding plate 210. The two pulling rods 220 are connected by a pulling plate 230 at one end toward the retainer 500, and the other ends of the two pulling rods 220 are connected by a lower connecting plate 240. The lower folding plate 210 is slidingly provided with a lower driving plate 250 for driving the lower connecting plate 240 to move relative to the lower folding plate 210. When the power part 400 drives the lower driving plate 250 to move relative to the lower folding plate 210, the lower driving plate 250 will push the lower connecting plate 240 to move accordingly, so that the lower connecting plate 240 can drive the pulling rods 220 and the pulling plate 230 to move relative to the lower folding plate 210, and the pulling plate hooks the retainer 500, so that the pulling plate 230 can open the retainer 500.

[0033] The lower folding plate 210 is provided with a first guide rail 211 which is slidably connected to the lower driving plate 250, and the first spring 221 is sleeved on the tension rod 220, and the first spring 221 is stuck between the pulling plate 230 and the lower folding plate 210, wherein the movement direction of the lower driving plate 250 is perpendicular to the movement direction of the lower connecting plate 240. When the power part 400 drives the lower driving plate 250 to move relative to the lower folding plate 210, the lower roller 241 will move back and forth on the second oblique edge 251 and the second straight edge 252. Specifically, the lower roller 241 is in close contact with the second oblique edge 251 and When rolling in the direction away from the second straight edge 252, the lower connecting plate 240 will move in the direction away from the retainer 500, so that the retainer 500 can be pulled and the retainer 500 can be opened. At the same time, the first spring 221 is compressed, so that an elastic force is generated between the pull plate 230 and the lower folding plate 210, that is, the lower roller 241 on the lower connecting plate 240 can be closely attached to the second oblique edge 251; when the lower roller 241 rolls close to the second straight edge 252, the lower connecting plate 240 always remains stationary relative to the lower folding plate 210, so that the retainer 500 is in the closed state at this time. At the same time, because the first spring 221 is between the pull plate 230 and the lower folding plate 210, a certain elastic force is also generated between the pull plate 230 and the lower folding plate 210, that is, the lower roller 241 on the lower connecting plate 240 can be attached to the second straight edge 252.

[0034] An induction plate 260 is provided at one end of the lower connecting plate 240, and an induction foot 261 is provided at the bottom edge of the induction plate 260. Two induction switches 270 corresponding to the induction feet 261 are provided on the lower folding plate 210. The power member 400 is electrically connected to the induction switch 270. A clamping device (not marked in the figure) provided above the retainer 500 and used to clamp the bag is also electrically connected to the induction switch 270. When the lower connecting plate 240 moves relative to the lower folding plate 210, the induction foot 261 also moves synchronously with the lower connecting plate 240 to realize the induction foot 261 moving back and forth between the two induction switches 270. Further, when the retainer 500 is in the closed state, the induction foot 261 is located close to the retainer 500. 0 is located directly above the sensing switch 270. When the clamping device (not marked in the figure) clamps the bag, the clamping device transmits a signal to the first motor 420, the first motor 420 runs, the lower connecting plate 240 moves, and when the sensing foot 261 is located directly above the sensing switch 270 away from the clamper, the first motor 420 stops running again. At this time, the retainer 500 is fully opened. Afterwards, when the bags in the retainer 500 are heat-sealed and new bags are added, people need to control the first motor 420 to run again until the sensing foot 261 is located directly above the sensing switch 270 close to the retainer 500, the retainer 500 clamps the new bag, and the first motor 420 stops running.

[0035] like Figure 1 、 Figure 2 、 Figure 4 As shown, the opening assembly 300 includes an upper folding plate 310 connected to the lower folding plate 210 and at least two opening rods 320 that are movable through the upper folding plate 310. The two opening rods 320 are connected by an upper connecting plate 330 at one end away from the retainer 500. The upper folding plate 310 is slidingly provided with an upper driving plate 340 for driving the upper connecting plate 330 to move relative to the upper folding plate 310. When the power part 400 drives the upper driving plate 340 to move relative to the upper folding plate 310, the upper driving plate 340 will push the upper connecting plate 330 to move accordingly, so that the upper connecting plate 330 can drive the opening rod 320 to move relative to the upper folding plate 310, thereby realizing that the opening rod 320 is against the clamping part on the retainer 500.

[0036] When the cam 330 is in the unlock state, the first and second side rails 331 are in the unlock state, and the second and second side rails 332 are in the unlock state, so that the cam 330 can be unlocked. When the upper connecting plate 330 is attached to the first oblique edge 341 and rolls in the direction close to the first straight edge 342, the upper connecting plate 330 will move in the direction close to the retainer 500 until the opening rod 320 is against the clamping part of the retainer 500. At the same time, the second spring 321 is compressed, so that an elastic force is generated between the upper connecting plate 330 and the upper folding plate 310, that is, the upper roller 331 on the upper connecting plate 330 can be closely attached to the first oblique edge 341; when the upper roller 331 rolls on the first straight edge 342, the upper connecting plate 330 is always stationary relative to the upper folding plate 310, so that the opening rod 320 is stationary relative to the upper folding plate 310 at this time. At the same time, due to the elastic force between the upper connecting plate 330 and the upper folding plate 310, the upper roller 331 on the upper connecting plate 330 can be attached to the first straight edge 342.

[0037] A groove 343 for accommodating the upper connecting plate 330 is provided on the upper driving plate 340 . The groove 343 prevents the upper connecting plate 330 from affecting the movement of the upper driving plate 340 relative to the upper folding plate 310 .

[0038] In the present invention, the clamping claws 522 of the retainer 500 are the clamping parts of the retainer 500 .

[0039] like Figure 1 、 Figure 3 、 Figure 6 and Figure 7As shown, the power member 400 includes a first motor 420 provided on the bottom surface of the fixed plate 100, the first motor 420 is provided with a first gear 420, the upper drive plate 340 and the lower drive plate 250 are both engaged with the first gear 420, the retainer 500 includes a rear shell 510 and a front shell 520, the rear shell 510 is provided with at least two retaining rods 511, the retaining rods 511 pass through the front shell 520, and the retaining rods 511 are each sleeved with a third spring 512, the third spring 512 is stuck between the end of the holding rod 511 away from the rear shell 510 and the front shell 520. The front shell 520 is provided with a bending plate 521 that is buckled with the pull plate 230. The two sides of the front shell 520 are hinged with clamping claws 522 for clamping the bag. The number of the clamping claws 522 is the same as the number of the opening rod 320. When the first motor 420 drives the first gear 420 to rotate, the upper driving plate 340 and the lower driving plate 250 are respectively located on both sides of the first gear 420, so that the upper driving plate 340 0 is opposite to the moving direction of the lower driving plate 250. Further, when the upper roller 331 rolls on the first oblique edge 341, the lower roller 241 rolls on the second straight edge 252, so that the opening rod 320 of the opening component 300 is extended until the opening rod 320 abuts against the clamping claw 522 of the retainer 500; when the upper roller 331 rolls on the first straight edge 342, the lower roller 241 rolls on the second oblique edge 251, so that the pulling plate 230 of the pulling assembly 200 drives the retainer 500 to move. The bent plate 521 of the holder 500 separates the front shell 520 and the rear shell 510 of the holder 500, thereby opening the holder 500 and causing the clamping claw 522 on the holder 500 to rotate, thereby causing the clamping claw 522 to release the bag in the holder 500. At the same time, the third spring 512 is compressed, and there is elastic force between the front shell 520 and the rear shell 510, so that when the pull plate 230 is reset, the front shell 520 is automatically reset by the elastic force of the third spring 512.

[0040] Each of the clamping jaws 522 is provided with a contact plate 522a and a soft block 522b. The soft block 522b can be embedded in the front shell 520. The front shell 520 is provided with a rotating rod 523, which passes through the clamping jaws 522. A torsion spring 523a is sleeved on the rotating rod 523. One end of the torsion spring 523a abuts against the clamping jaw 522, and the other end abuts against the front shell 520, so that the clamping jaw 522 can be pressed against the front shell 520 without external force. The soft block 522b is embedded in the front shell 520, thereby clamping the bag in the holder 500, and when the opening rod 320 abuts the contact plate 522a and the front shell 520 is separated from the rear shell 510, the contact plate 522a on the clamping jaw 522 is blocked by the opening rod 320, the clamping jaw 522 rotates, and the soft block 522b on the clamping jaw 522 is moved out of the front shell 520, so that the clamping jaw 522 no longer clamps the bag in the holder 500.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, descriptions such as "first," "second," and "one" are for descriptive purposes only and should not be understood to indicate or imply their relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A pull rod mechanism for a bag holder, characterized in that: include: Fixed plate; A tension assembly is provided on the fixed plate; an opening assembly is provided on the tension assembly, the opening assembly can cause the retainer to release the bag, and the fixed plate is provided with a power member for driving the tension assembly and the opening assembly to move; when the power member is in operation, the opening assembly moves relative to the fixed plate and the tension assembly remains stationary relative to the fixed plate, or the tension assembly moves relative to the fixed plate and the opening assembly remains stationary relative to the fixed plate; The tension assembly includes a lower folding plate provided on the fixed plate and at least two tension rods that move through the lower folding plate. One end of the two tension rods facing the retainer is connected by a pull plate, and the other ends of the two tension rods are connected by a lower connecting plate. A lower driving plate is slidably provided on the lower folding plate for driving the lower connecting plate to move relative to the lower folding plate. The bottom surface of the lower connecting plate is provided with a lower roller, the side surface of the lower roller is attached to the side edge of the lower driving plate away from the retainer, the side edge of the lower driving plate away from the retainer is provided with a second oblique edge and a second straight edge, the lower folding plate is provided with a first guide rail slidably connected to the lower driving plate, the tension rod is sleeved with a first spring, and the first spring is clamped between the pulling plate and the lower folding plate; The opening assembly includes an upper folding plate connected to the lower folding plate and at least two opening rods that move through the upper folding plate. The ends of the two opening rods that are away from the retainer are connected by an upper connecting plate. An upper driving plate is slidably provided on the upper folding plate for driving the upper connecting plate to move relative to the upper folding plate. An upper roller is provided on the bottom surface of the upper connecting plate, and a side surface of the upper roller abuts against a side edge of the upper driving plate close to the retainer. A first oblique side corresponding to the second straight side and a first straight side corresponding to the second oblique side are provided on the side edge of the upper driving plate close to the retainer; The upper folding plate is provided with a second guide rail slidably connected to the upper driving plate, the opening rod is sleeved with a second spring, the second spring is clamped between the upper connecting plate and the upper folding plate, and the upper driving plate is provided with a groove for accommodating the upper connecting plate; The retainer includes a rear shell and a front shell, and the rear shell is provided with at least two retaining rods, and the retaining rods pass through the front shell. The retaining rods are each provided with a third spring, and the third spring is clamped between the end of the retaining rod away from the rear shell and the front shell, and the front shell is provided with a bending plate that is buckled with the pull plate.

2. The pull rod mechanism of the bag holder according to claim 1, characterized in that: The power component includes a first motor arranged on the bottom surface of the fixing plate. The first motor is provided with a first gear. The upper driving plate and the lower driving plate are both engaged with the first gear.

3. The pull rod mechanism of the bag holder according to claim 1, characterized in that: Both sides of the front shell are hinged with clamping claws for clamping the bag, and the number of the clamping claws is the same as the number of the opening rods.

4. The pull rod mechanism of the bag holder according to claim 3, characterized in that: Each of the clamping jaws is provided with a contact plate and a soft block, which can be embedded in the front shell. The front shell is provided with a rotating rod, which passes through the clamping jaw. A torsion spring is sleeved on the rotating rod, one end of the torsion spring rests against the clamping jaw, and the other end rests against the front shell.

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