CN211845063U - Transfer mechanism - Google Patents

Abstract

The utility model provides a move and carry mechanism for treating moving of sealing the wrapping bag moves and carry, move and carry the mechanism and include the chassis and install move on the chassis and carry device and drive arrangement, wherein: the driving device is connected with the transfer device, the transfer device is connected with the underframe and is driven by the driving device to do linear reciprocating motion along a first direction; the transferring device comprises a first bag clamping assembly used for fixing the packaging bag to be sealed; first clamp bag subassembly has the clamping member, just is in first clamp bag subassembly centre gripping when treating the sack of sealing the wrapping bag, the clamping member compresses tightly treat the sack below of sealing the wrapping bag, and the shrink treat the inboard accommodation space of sack of sealing the wrapping bag. The utility model discloses a set up first bag subassembly and the centre gripping component of pressing from both sides, not only can fix and seal the sack of treating the sealing packaging bag, can also contract inside accommodation space to with the interior gas outgoing of accommodation space.

Description

Transfer mechanism

Technical Field

The embodiment of the utility model provides a relate to the mechanical equipment field, more specifically say, relate to a move and carry mechanism.

Background

Powder packagine machine is the equipment for packing that can will wait to pack powder material bagging-off to wrapping bag, and this equipment for packing can replace artifical bagging-off, improves bagging-off efficiency from this, realizes intelligent automatic packing, and can guarantee the uniformity of bagging-off operation, and the controllability is higher. With the development of science and technology and the continuous improvement of automation technology, the powder packaging machine has more and more powerful functions, and therefore, the powder packaging machine is widely applied to the industries of food, medicine, chemical industry, powder metallurgy and the like.

At present, after the bagging operation on the powder packaging machine is completed, the packaging bag to be sealed needs to be transferred to a sealing mechanism for sealing operation, and due to the limitation of space position, a transfer mechanism is often needed to be arranged on the powder packaging machine for transferring the packaging bag to be sealed. However, the transfer mechanism on the existing powder packaging machine is usually not provided with a device for fixing the bag opening of the packaging bag to be sealed, so that the packaging bag to be sealed is easy to shake and tilt in the transfer process, so that the packaging materials in the packaging bag to be sealed scatter to the outside, and the packaging quality is affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a move on to above-mentioned current powder packaging machine and carry mechanism do not set up and be used for the fixed device of treating the sack of sealing the wrapping bag, cause the slope easily to cause the bagging-off material to fly to outside and influence the problem of packaging quality, provide one kind and move and carry the mechanism.

The embodiment of the utility model provides a solve above-mentioned technical problem's technical scheme be, provide a move and carry mechanism for waiting to seal moving of wrapping bag and carrying, move and carry the mechanism and include the chassis and install move on the chassis and carry device and drive arrangement, wherein: the driving device is connected with the transfer device, the transfer device is connected with the underframe in a movable connection mode and is driven by the driving device to do linear reciprocating motion along a first direction; the transfer device comprises a first bag clamping assembly used for fixing the packaging bag to be sealed, and the first bag clamping assembly positions and fixes the packaging bag to be sealed by clamping the bag opening of the packaging bag to be sealed; first clamp bag subassembly has and is used for discharging treat the gaseous clamping member in the inside of sealing the wrapping bag, just be in first clamp bag subassembly centre gripping when treating the sack of sealing the wrapping bag, clamping member compresses tightly treat the sack below of sealing the wrapping bag, and the shrink treat the inboard accommodation space of sack of sealing the wrapping bag.

Preferably, the first bag clamping assembly comprises two bag clamping cylinder assemblies respectively corresponding to two ends of the bag opening of the packaging bag to be sealed in the second direction, each bag clamping cylinder assembly comprises a bag clamping cylinder and two clamping arms driven by the bag clamping cylinder, each clamping arm is respectively provided with one clamping member, and the second direction is perpendicular to the first direction;

clamping surfaces formed by the clamping components of the two bag clamping air cylinder assemblies are positioned in the same plane and are respectively perpendicular to the first direction.

Preferably, the clamping member is L-shaped, a protrusion is arranged at one end of the clamping member close to the bag clamping cylinder assembly, and an anti-skid tooth structure is arranged on the outer side surface of the protrusion;

the first bag clamping assembly further comprises two first air cylinders, the two first air cylinders are respectively and fixedly connected with the bag clamping air cylinder assembly, and the two first air cylinders push/pull the clamping members on the two bag clamping air cylinder assemblies to press downwards, so that the inner containing space of the packaging bag to be sealed is contracted.

Preferably, move and carry device still includes the support and is used for the fixed second of sealing the back wrapping bag and press from both sides a bag subassembly, just first press from both sides a bag subassembly and a second press from both sides a bag subassembly and follow install in first direction on the support.

Preferably, the base frame comprises two parallel guide edges, and the two guide edges are arranged along the first direction;

the bracket is provided with a plurality of guide wheel sets consisting of two idler wheels, and the distance between the two idler wheels of each guide wheel set is matched with the size of the guide edge; the support is limited on two guide edges through a plurality of groups of guide wheel sets and is movably connected with the underframe.

Preferably, the driving device comprises a rack mounted on the chassis, a driving motor mounted on the bracket, and a gear fixed to an output shaft of the driving motor, and the gear is engaged with the rack; and when the driving motor is started, the bracket drives the plurality of groups of rollers to reciprocate on the two guide edges.

Preferably, the two side edges in the width direction of the base frame form the guide edges, and when the bracket is movably connected to the base frame, each group of guide wheel sets is limited on the guide edges in a manner that the rolling surfaces of the two rollers are respectively attached to the top surfaces and the bottom surfaces of the guide edges;

the support includes connecting body, and connects first main part and the second main part at connecting body's both ends, first main part and second main part are parallel, just first main part and second main part surface towards each other are equipped with at least two sets of guide wheel group.

Preferably, the transfer device further comprises a supporting component for supporting the packaging bag to be sealed, and the supporting component is positioned right below the first bag clamping component;

the supporting and taking assembly comprises a first supporting and taking component and two second air cylinders fixedly connected with the first supporting and taking component, and the first supporting and taking component does ascending or descending movement relative to the first bag clamping assembly through the pushing and pulling action of the two second air cylinders; the first supporting member is provided with at least one first avoidance position for avoiding the extraction position and the placement position of the packaging bag to be sealed.

Preferably, the first member of getting of holding in the palm includes first bottom plate and the perpendicular connection in a plurality of edges on the first bottom plate the first backup pad that first direction set up, it is a plurality of first backup pad is the T style of calligraphy and follows the setting is arranged to the second direction, and adjacent two clearance between the first backup pad forms a first position of dodging.

Preferably, the base frame is provided with a first mounting position for mounting a mechanism for opening the mouth of the packaging bag and a second mounting position for mounting a mechanism for sealing the mouth of the packaging bag to be sealed, the first mounting position and the second mounting position are arranged along the first direction, and the distance from the first mounting position to the second mounting position is greater than or equal to the distance from the first bag clamping assembly to the second bag clamping assembly;

a second supporting member is arranged on the second mounting position and comprises a second bottom plate and a plurality of second supporting plates which are vertically connected to the second bottom plate and arranged along the first direction; a plurality of the second supporting plates are L-shaped or T-shaped and are arranged along the second direction, and the two adjacent second supporting plates form a second avoidance position in the gap.

The utility model discloses move and carry mechanism has following beneficial effect: by arranging the first bag clamping assembly, the bag opening of the packaging bag to be sealed is clamped by the first bag clamping assembly so as to position and fix the packaging bag to be sealed, so that the influence caused by vibration can be reduced, the inclination can be prevented, the bag opening of the packaging bag to be sealed can be closed, the accommodating space of the packaging bag to be sealed is sealed, the bagging materials in the accommodating space are not easy to scatter to the outside, and the stability is relatively high; and, still through setting up the centre gripping component, can the fixed accommodation space of treating the sack inboard of the wrapping bag of waiting to seal that contracts when waiting to seal the wrapping bag, can not only with the gas escape in the accommodation space, can reduce the activity space of the bagging-off material of the inside of waiting to seal the wrapping bag again to can effectively weaken the shake effect that vibrations brought, further improve stability.

Drawings

Fig. 1 is a schematic structural view of a transfer mechanism provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bottom of a transfer mechanism according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the present invention is a schematic structural diagram of a transfer mechanism provided in an embodiment of the present invention, and the transfer mechanism can be applied to the field of mechanical equipment, especially in bagging and packaging equipment for powder materials or dust-containing materials. The transferring mechanism in this embodiment is mainly used to transfer the packaging bag to be sealed, which has been bagged with the bagging material into the internal accommodating space, to a next executing mechanism (e.g., a sealing mechanism or a vacuum-pumping mechanism).

As shown in fig. 2, the transfer mechanism includes a base frame 1, and a transfer device 2 and a driving device 3 mounted on the base frame 1, and the driving device 3 mounted on the base frame 1 is connected to the transfer device 2. To achieve the transfer function, the transfer device 2 is movably fixed to the base frame 1. Since the driving device 3 is connected to the transfer device 2, the transfer device 2 can be driven by the driving device 3 to linearly reciprocate the transfer device 2 on the base frame 1 in the first direction. In practical applications, the first direction may be specifically adjusted according to practical situations, and when the transferring mechanism is applied to a packaging device (e.g., a powder packaging machine), the first direction may be a connection direction between the bagging mechanism and the sealing mechanism.

Further, the transfer device 2 comprises a first bag clamping assembly 21 for fixing the packaging bag to be sealed, the first bag clamping assembly 21 fixes and fixes the packaging bag to be sealed by clamping the bag opening of the packaging bag to be sealed, namely, the transfer mechanism can effectively restrict the position of the bag opening of the packaging bag to be sealed, so that the bag opening of the packaging bag to be sealed in the whole transfer process through the transfer mechanism is controllable, and the stability in the transfer process is improved.

Be different from current move and carry mechanism and do not set up the device that is used for fixed sack of waiting to seal the wrapping bag, the aforesaid moves and carries the mechanism through increasing first bag subassembly 21, can fix a position effectively and fix a position and wait to seal the wrapping bag, simple structure is practical, not only can reduce the influence that vibrations brought, prevents to wait to seal the sack slope of wrapping bag, can also close the sack of waiting to seal the wrapping bag, and then the sealed accommodation space of waiting to seal the wrapping bag for the bagging-off material in the accommodation space is difficult for scattering to the outside. Especially when the bagging-off material is more expensive powder material, can effectively avoid causing the waste, can also prevent dust pollution, the practicality is higher relatively.

In addition, above-mentioned first bag clamping assembly 21 is equipped with the clamping member 211 that is used for discharging the inside gas of the wrapping bag of waiting to seal, can be when the sack of the wrapping bag of waiting to seal is held to first bag clamping assembly 21, compress tightly in the sack below of the wrapping bag of waiting to seal by clamping member 211, with the accommodation space of the inboard sack of the corresponding wrapping bag of waiting to seal, thereby can reduce the activity space of the bagging-off material of the inside of the wrapping bag of waiting to seal, in the wrapping bag of waiting to seal moves the in-process of carrying, can weaken the shake effect that vibrations brought during vibrations, can improve the overall stability of the wrapping bag of waiting to seal from this, and make the appearance controllability of the wrapping bag of waiting to seal.

In addition, the first bag clamping assembly 21 can effectively exhaust the gas in the empty accommodating space inside the packaging bag to be sealed by contracting the accommodating space inside the bag opening of the packaging bag to be sealed through the clamping member 211. When the packaging bag to be sealed needs to be vacuumized, the vacuumizing efficiency can be improved, the packaging period is further shortened, and the productivity is improved.

The first bag clamping assembly 21 includes two bag clamping cylinder assemblies 212 respectively corresponding to two ends of the second direction of the bag opening of the bag to be sealed, and each bag clamping cylinder assembly 212 includes a bag clamping cylinder and two clamping arms driven by the bag clamping cylinder. And, the clamping arm on each bag clamping cylinder is equipped with a clamping member 211 respectively, namely when the first bag clamping assembly 21 starts, the bag clamping cylinder drives two clamping arms, and the clamping member 211 mounted thereon is driven by the two corresponding clamping arms to move relatively so as to clamp the mouth of the packaging bag to be sealed. The bag clamping mode can effectively simplify the structure, avoid increasing the manufacturing cost, improve the designability of the structure and facilitate the shape changing design of the structure at the later stage.

For making the structure more stable reasonable, preferably with the mode setting of above-mentioned second direction with the first direction of perpendicular to, be convenient for carry the structural design who carries device 2, reduce the whole mechanism design degree of difficulty.

Because the clamping surfaces formed by the clamping members 211 of the two bag clamping air cylinder assemblies 212 are positioned in the same plane and are respectively perpendicular to the first direction, the two bag clamping air cylinder assemblies 212 can be stably clamped on the same horizontal height of the bag opening of the packaging bag to be sealed, the two bag clamping air cylinder assemblies 212 can be enabled to bear the force in a balanced manner, and the phenomenon that the packaging bag to be sealed is inclined after being clamped to influence the stability can be avoided.

Specifically, clamping member 211 is the L type, and this L type structure is clamping member 211's optimum shape, can be when two bag cylinder assembly 212 clamp the sack of waiting to seal the wrapping bag, the one end centre gripping that keeps away from the bag cylinder by the L type shrink the below position of sack to realize exhausting and shrink the inside vacant accommodation space of waiting to seal the wrapping bag, simple structure and convenient processing preparation. Of course, in practical applications, the specific shape of the clamping member 211 can be adjusted according to practical situations, such as a zigzag shape, a T-shape, and the like.

In addition, a protrusion is provided at one end of the clamping member 211 close to the bag clamping cylinder assembly 212, and an anti-slip tooth structure is provided on the outer side surface of the protrusion. When the two bag clamping cylinder assemblies 212 clamp the bag mouths of the packaging bags to be sealed, the bag mouths of the packaging bags to be sealed can be attached and fixed by the bulges of the two corresponding clamping members 211, so that the contact area of the fixed positions is effectively reduced, and the stability of clamping connection can be improved. And through set up anti-skidding tooth structure at bellied lateral surface, can increase frictional force, further improve stability, avoid sliding and drop.

The first bag clamping assembly 21 further comprises two first air cylinders 213, and the two first air cylinders 213 are respectively and fixedly connected with the bag clamping air cylinder of one bag clamping air cylinder assembly 212, and the two first air cylinders 213 push/pull the clamping members 211 on the two bag clamping air cylinder assemblies 212 to press downwards, so that the accommodating space inside the packaging bag can be further contracted.

The transfer device 2 further comprises a support 22 and a second bag clamping assembly 23 used for fixing the sealed packaging bag, the first bag clamping assembly 21 and the second bag clamping assembly 23 are mounted on the support 22 along the first direction, and the first bag clamping cylinder assembly 212 can be matched with the second bag clamping assembly 23 to transfer the packaging bags to be clamped (to be sealed and sealed) of the two execution stations. Therefore, the double-station synchronous operation of the transfer device 2 can be realized by the structure, the working strength of the first bag clamping assembly 21 can be reduced, the working efficiency can be effectively improved, and the productivity of application equipment can be conveniently improved.

In an embodiment of the present invention, the bottom frame 1 comprises two guiding edges 11 parallel to each other, and the two guiding edges 11 are both arranged along the first direction. In addition, the support 22 of the transfer device 2 is provided with a plurality of guide wheel sets formed by two rollers 224, and the distance between the two rollers 224 of each guide wheel set is matched with the size of the guide edge 11, so that the support 22 is movably connected with the underframe 1 in a manner that the plurality of guide wheel sets are limited on the two guide edges 11. The movable connection structure is applied in the transfer mechanism, so that the convenience of assembling and disassembling the transfer device 2 can be effectively improved, the structure is simple, and the blockage can be prevented.

In order to further simplify the structure, the two guiding edges 11 of the chassis 1 may be formed by two side edges in the width direction of the chassis 1, when the bracket 22 is movably connected to the chassis 1, each group of guiding wheel sets is limited on the guiding edges 11 in a manner that the rolling surfaces of the two rollers 224 are respectively attached to the top surfaces and the bottom surfaces of the guiding edges 11, and no additional guiding component or processing guiding structure is required, so that the manufacturing cost of the movable connecting structure can be reduced, and the practicability of the structural design is improved.

Since the bracket 22 includes the connecting body 221, and the first body 222 and the second body 223 connected to both ends of the connecting body 221 (specifically, the first body 222 and the second body 223 are parallel to avoid a complicated structure), at least two sets of the above-mentioned guide wheel sets are respectively installed on the surfaces of the first body 222 and the second body 223 of the bracket 22 facing each other in order to secure the stability of the movable connection between the bracket 22 and the base frame 1. Of course, the number of guide wheel sets provided on the first body 222 and the second body 223 can be determined according to actual conditions, and two sets are preferable, so as to avoid the complicated structure caused by the redundant design and the increased manufacturing cost.

In another embodiment of the present invention, the driving device 3 includes a rack 31 installed on the chassis 1, a driving motor 32 installed on the bracket 22, and a gear 33 fixed on an output shaft of the driving motor 32, and the gear 33 is engaged with the rack 31, so as to ensure that the driving motor 32 can cooperate with the rack 31 to realize transmission when the driving gear 33 is driven. When the driving motor 32 is started, the bracket 22 drives the plurality of sets of rollers 224 to reciprocate on the two guiding edges 11, so as to transfer the transfer device 2 along the first direction.

The transfer device 2 further comprises a supporting and taking assembly 24 for supporting and taking the packaging bag to be sealed, and the supporting and taking assembly 24 is located right below the first bag clamping assembly 21. The supporting and fetching assembly 24 includes a first supporting and fetching member 241 and two second air cylinders 242 fixedly connected to the first supporting and fetching member 241, wherein the first supporting and fetching member 241 is used for ascending or descending relative to the first bag clamping assembly 21 by the pushing and pulling action of the two second air cylinders 242, so that the first supporting and fetching member 241 can be pushed and pulled to ascend or descend by the two second air cylinders 242, and a packaging bag to be sealed on the first supporting and fetching member 241 is supported or placed at a preset position.

In order to ensure that the first supporting member 241 can extract the bag opening packaging bag from the extraction position of the packaging bag to be sealed, at least one first avoidance position for avoiding the extraction position and the placement position of the packaging bag to be sealed is arranged on the first supporting member 241. Of course, in practical applications, the structural design of the picking assembly 24 can be specifically adjusted according to practical situations.

The first supporting member 241 includes a first bottom plate and a plurality of first supporting plates 2411 arranged along a first direction, and when the package to be sealed is supported, the bottom of the package to be sealed can be supported on the upper surfaces of the plurality of first supporting plates 2411. Specifically, the first support plates 2411 are T-shaped, the first support plates 2411 are arranged along the second direction, and a first avoidance position is formed between a gap between two adjacent first support plates 2411. Because the transfer mechanism needs to transfer the package bag to be sealed from the extraction position to the placement position, and the first supporting member 241 is located between the extraction position and the placement position, the T-shaped first supporting plate 2411 can be inserted into the extraction position to extract the package bag to be sealed, and can also be inserted into the placement position to prevent the package bag to be sealed from being placed on the placement position. The first supporting member 241 has a simplest structure, and thus, the structure of the first supporting member is not complicated while ensuring the inserting and supporting functions, and the practicability is relatively high.

Of course, in practical applications, the first supporting plate 2411 may be disposed in other shapes, but this will affect the transfer stability of the package bag to be sealed, and is preferably disposed in a T-shape.

In another embodiment of the present invention, the chassis 1 is provided with two parallel slide rails, and the two slide rails are disposed along the first direction. The bracket 22 is provided with a plurality of sliding blocks corresponding to the sliding rails, and the bracket 22 is movably connected with the chassis 1 in a manner that the sliding blocks are connected to the two sliding rails in a sliding manner. When the driving device 3 drives the transferring device 2 to reciprocate along the first direction, the bracket 22 drives the plurality of sliding blocks to respectively slide on the two sliding rails.

The first installation position that has the mechanism that supplies to be used for opening the sack of wrapping bag on above-mentioned chassis 1 and the second installation position that supplies to be used for the sealed mechanism installation of the sack of waiting to seal the wrapping bag, and first installation position and second installation position are followed first direction sets up. Preferably, the distance between the first installation position and the second installation position is greater than or equal to the distance between the first bag clamping assembly 21 and the second bag clamping assembly 23, so as to avoid that the distance between the first installation position and the second installation position is less than the distance between the first bag clamping assembly 21 and the second bag clamping assembly 23, and the second bag clamping assembly 23 cannot be transferred to the second installation position to transfer the packaging bag to be transferred to the second installation position. Therefore, the distance between the first installation position and the second installation position is set to be larger than or equal to the distance between the first bag clamping assembly 21 and the second bag clamping assembly 23, and the double-station transfer function can be realized.

Particularly, when the transfer mechanism is applied to the powder packaging machine, the bag opening mechanism of the powder packaging machine can be arranged on the first mounting position of the transfer mechanism, and the sealing mechanism can be arranged on the second mounting position of the transfer mechanism, so that the packaging bag to be sealed can be stably and reliably transferred from the bag opening mechanism to the sealing mechanism through the transfer mechanism.

In addition, the second mounting position is provided with a second supporting member 12, the second supporting member 12 includes a second bottom plate and a plurality of second supporting plates 121 vertically connected to the second bottom plate and arranged along the first direction, the plurality of second supporting plates 121 are L-shaped or T-shaped (the shape of the second supporting plates 121 can be adjusted according to actual conditions), and are arranged along the second direction, so as to be conveniently arranged corresponding to the first supporting member 241. A second avoiding position is formed in a gap between two adjacent second supporting plates 121, and the second avoiding position corresponds to the first supporting plate 2411 of the first supporting member 241, so that when the bag is moved, the first supporting plate 2411 of the first supporting member 241 can be inserted into the second avoiding hole of the corresponding second supporting member 12, and therefore the packaging bag to be sealed is placed on the second supporting member 12.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a move and carry mechanism for treating moving of sealing wrapping bag moves, its characterized in that moves and carry the mechanism and include the chassis and install move and carry device and drive arrangement on the chassis, wherein: the driving device is connected with the transfer device, the transfer device is connected with the underframe in a movable connection mode and is driven by the driving device to do linear reciprocating motion along a first direction; the transfer device comprises a first bag clamping assembly used for fixing the packaging bag to be sealed, and the first bag clamping assembly positions and fixes the packaging bag to be sealed by clamping the bag opening of the packaging bag to be sealed; first clamp bag subassembly has and is used for discharging treat the gaseous clamping member in the inside of sealing the wrapping bag, just be in first clamp bag subassembly centre gripping when treating the sack of sealing the wrapping bag, clamping member compresses tightly treat the sack below of sealing the wrapping bag, and the shrink treat the inboard accommodation space of sack of sealing the wrapping bag.

2. The transfer mechanism according to claim 1, wherein said first bag clamping assembly comprises two bag clamping cylinder assemblies respectively corresponding to two ends of the second direction of the bag mouth of the bag to be sealed, and each bag clamping cylinder assembly comprises a bag clamping cylinder and two clamping arms driven by said bag clamping cylinder, and each clamping arm is respectively provided with one of said clamping members, and said second direction is perpendicular to said first direction;

clamping surfaces formed by the clamping components of the two bag clamping air cylinder assemblies are positioned in the same plane and are respectively perpendicular to the first direction.

3. The transfer mechanism according to claim 2, wherein the holding member is L-shaped, and a protrusion is provided at one end of the holding member close to the bag clamping cylinder assembly, and an anti-slip tooth structure is provided on an outer side surface of the protrusion;

the first bag clamping assembly further comprises two first air cylinders, the two first air cylinders are respectively and fixedly connected with the bag clamping air cylinder assembly, and the two first air cylinders push/pull the clamping members on the two bag clamping air cylinder assemblies to press downwards, so that the inner containing space of the packaging bag to be sealed is contracted.

4. The transfer mechanism according to claim 2, wherein the transfer device further comprises a support and a second bag clamping member for fixing the sealed bag, and the first bag clamping member and the second bag clamping member are mounted on the support along the first direction.

5. The transfer mechanism according to claim 4, wherein the chassis includes two guide edges parallel to each other, and both of the two guide edges are arranged along the first direction;

the bracket is provided with a plurality of guide wheel sets consisting of two idler wheels, and the distance between the two idler wheels of each guide wheel set is matched with the size of the guide edge; the support is limited on two guide edges through a plurality of groups of guide wheel sets and is movably connected with the underframe.

6. The transfer mechanism according to claim 5, wherein the driving means includes a rack mounted on the base frame, a driving motor mounted on the support frame, and a gear fixed to an output shaft of the driving motor, and the gear is engaged with the rack; and when the driving motor is started, the bracket drives the plurality of groups of rollers to reciprocate on the two guide edges.

7. The transfer mechanism according to claim 5, wherein two side edges in the width direction of the bottom frame form the guide edge, and when the support is movably connected to the bottom frame, each group of the guide wheel sets is limited on the guide edge in a manner that rolling surfaces of two rollers respectively abut against the top surface and the bottom surface of the guide edge;

the support includes connecting body, and connects first main part and the second main part at connecting body's both ends, first main part and second main part are parallel, just first main part and second main part surface towards each other are equipped with at least two sets of guide wheel group.

8. The transfer mechanism according to claim 3, wherein the transfer device further comprises a holding component for holding the packaging bag to be sealed, and the holding component is located right below the first bag clamping component;

the supporting and taking assembly comprises a first supporting and taking component and two second air cylinders fixedly connected with the first supporting and taking component, and the first supporting and taking component does ascending or descending movement relative to the first bag clamping assembly through the pushing and pulling action of the two second air cylinders; the first supporting member is provided with at least one first avoidance position for avoiding the extraction position and the placement position of the packaging bag to be sealed.

9. The transfer mechanism according to claim 8, wherein the first supporting member includes a first bottom plate and a plurality of first supporting plates vertically connected to the first bottom plate and disposed along the first direction, the plurality of first supporting plates are T-shaped and disposed along the second direction, and a gap between two adjacent first supporting plates forms a first avoiding position.

10. The transfer mechanism according to claim 4, wherein the chassis is provided with a first mounting position for mounting a mechanism for opening the mouth of the bag and a second mounting position for mounting a mechanism for sealing the mouth of the bag to be sealed, the first mounting position and the second mounting position are arranged along the first direction, and the distance from the first mounting position to the second mounting position is greater than or equal to the distance from the first bag clamping assembly to the second bag clamping assembly;

a second supporting member is arranged on the second mounting position and comprises a second bottom plate and a plurality of second supporting plates which are vertically connected to the second bottom plate and arranged along the first direction; a plurality of the second supporting plates are L-shaped or T-shaped and are arranged along the second direction, and the two adjacent second supporting plates form a second avoidance position in the gap.

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