CN220956618U - Drag chain supporting mechanism and digital printing machine - Google Patents

Abstract

The application provides a drag chain supporting mechanism and a digital printing machine, wherein the drag chain supporting mechanism comprises a supporting seat, a mandrel and a rubber coating roller, and the supporting seat is provided with a mounting hole; one end of the mandrel is connected with the top of the supporting seat, the axial direction of the mandrel extends along a second direction, and the second direction is perpendicular to the first direction; the rubber coating roller comprises a roller body and a flexible adhesive layer, the roller body is movably sleeved on the mandrel, the roller body and the mandrel are coaxially arranged, and the flexible adhesive layer is coated on the peripheral surface of the roller body; the digital printing machine comprises a guide rail beam, a trolley, a drag chain and the drag chain supporting mechanism, wherein a supporting seat of the drag chain supporting mechanism is connected with the side wall of the guide rail beam through a mounting hole and is supported on the drag chain through an encapsulation roller. The rolling friction is adopted between the drag chain and the rubber coating roller, and the flexible adhesive layer is coated on the peripheral surface of the roller body, so that the flexible adhesive layer is in flexible contact with the drag chain, abnormal sound and noise generated by the drag chain and the drag chain supporting mechanism are small, and meanwhile abrasion and vibration of the drag chain are reduced.

Description

Drag chain supporting mechanism and digital printing machine

Technical Field

The application belongs to the technical field of drag chains, and particularly relates to a drag chain supporting mechanism and a digital printing machine.

Background

The drag chain is widely applied to various industries such as digital printing machines, numerical control machine tools, manipulators, lifting and transporting equipment, medical imaging equipment and the like. The drag chain is mainly used for traction and protection of cables, oil pipes, air pipes, water pipes and the like, and can reciprocate along with the trolley in operation, and the trolley mainly refers to a device for driving an executing piece to move, for example, in a digital printing machine, the trolley is mainly used for installing components such as a printing spray head, a plate card and the drag chain, and the trolley can reciprocate on a guide rail beam in operation of the digital printing machine.

At present, in the motion process of a drag chain along with a trolley, in order to prevent the drop of the upper section of the drag chain, the upper section of the drag chain is overlapped with the lower section of the drag chain, a sheet metal supporting part is generally adopted to support the upper section of the drag chain, but the drag chain is in sliding hard contact with the sheet metal supporting part, so that the drag chain can generate larger vibration, abnormal sound and noise in the motion process and contact with the sheet metal supporting part, the drag chain can be worn for a long time, the service life of the drag chain is reduced, the sheet metal supporting part is easy to deform and incline, and the stability of the drag chain support by the sheet metal supporting part is influenced.

Disclosure of utility model

The embodiment of the application aims to provide a drag chain supporting mechanism and a digital printing machine, which are used for solving the technical problems that in the prior art, when the drag chain is in contact with a sheet metal supporting part due to the fact that the drag chain is in sliding hard contact with the sheet metal supporting part, the drag chain is greatly sounded and worn, and the sheet metal supporting part is easy to deform.

In order to achieve the above purpose, the application adopts the following technical scheme: there is provided a drag chain support mechanism comprising: the support seat is provided with a mounting hole, and the length of the mounting hole extends in a strip shape along the first direction;

The mandrel, one end of the mandrel is connected with the top of the supporting seat, the axial direction of the mandrel extends along a second direction, and the second direction is perpendicular to the first direction; and

The rubber coating cylinder comprises a cylinder body and a flexible adhesive layer, wherein the cylinder body is movably sleeved on the mandrel, the cylinder body and the mandrel are coaxially arranged, and the flexible adhesive layer is coated on the peripheral surface of the cylinder body.

The drag chain supporting mechanism provided by the application has the beneficial effects that: compared with the prior art, the drag chain supporting mechanism is detachably connected with the side wall of the mechanical equipment through the fastener penetrating through the mounting hole, and the length of the mounting hole extends in a strip shape along the first direction, so that the height position of the supporting seat mounted on the mechanical equipment can be finely adjusted along the direction parallel to the first direction according to requirements; through with the one end of dabber with the top of supporting seat is connected, locates the roller body movable sleeve the dabber for rubber coating cylinder can rotate relative dabber, just rubber coating cylinder includes roller body and flexible glue film, thereby when rubber coating cylinder supported the tow chain, is rolling friction between tow chain and the rubber coating cylinder, and when the tow chain moved promptly, the tow chain drove rubber coating cylinder and rotated around the central axis of dabber, through with flexible glue film cladding in on the periphery surface of roller body, make flexible glue layer and flexible contact of tow chain, like this, the abnormal sound, the noise that tow chain and tow chain supporting mechanism produced are less, are favorable to reducing wearing and tearing and the vibration of tow chain simultaneously, are favorable to prolonging the life of tow chain, and rubber coating cylinder and dabber cooperation, non-deformable are favorable to improving the stability to the tow chain support.

Optionally, the drag chain supporting mechanism further comprises a bearing, the bearing is sleeved on the mandrel, and the roller body is sleeved on the bearing sleeve.

Optionally, the mandrel is provided with a limiting groove, the drag chain supporting mechanism further comprises a retainer ring clamped in the limiting groove, the inner side wall of the roller body is provided with a step surface, and the bearing is located between the step surface and the retainer ring along the axial direction of the mandrel.

Optionally, the number of dabber with the rubber coating cylinder is two at least, and two at least dabbers are along the relative interval setting of third direction, the third direction perpendicular to first direction with the second direction, two at least rubber coating cylinders are respectively movable sleeve and are located two at least dabbers.

Optionally, the supporting seat includes two at least bracing pieces and connects two distance pole between the bracing piece, two at least dabber's one end respectively with two at least the top of bracing piece is connected, each the bracing piece all is equipped with the mounting hole.

Optionally, the number of the mounting holes on each supporting rod is one or more, and when the number of the mounting holes on each supporting rod is a plurality of the mounting holes, the plurality of the mounting holes on each supporting rod are arranged at intervals along the first direction.

Optionally, the top of each supporting rod is provided with a slot and a first fixing hole, one end of each mandrel is respectively inserted into the slot of each supporting rod, one end of each mandrel is provided with a second fixing hole correspondingly communicated with the first fixing hole, and the first fixing hole and the second fixing hole are both used for the fixing piece to pass through.

Optionally, each supporting rod is provided with a connecting hole, and two ends of the distance rod are respectively inserted into the connecting holes on two adjacent supporting rods.

Optionally, external threads are respectively arranged at two ends of the distance rod, the connecting holes are threaded holes, and two ends of the distance rod are respectively connected with the threaded holes on the two adjacent support rods in a threaded fit manner through the external threads.

The application also provides a digital printing machine, which comprises a guide rail beam, a trolley, a drag chain and any drag chain supporting mechanism, wherein the trolley is movably arranged on the guide rail beam and can reciprocate along the guide rail beam, one end of the drag chain is connected with the trolley, and the supporting seat of the drag chain supporting mechanism is connected with the guide rail beam through the mounting hole and is supported on the drag chain through the encapsulation roller.

The digital printing machine provided by the application has the beneficial effects that the drag chain supporting mechanism is adopted, when the drag chain moves through the rubber coating roller, the drag chain drives the rubber coating roller to rotate around the central axis of the mandrel, so that rolling friction is generated between the drag chain and the rubber coating roller, and the flexible adhesive layer is coated on the peripheral surface of the roller body, so that the flexible adhesive layer is in flexible contact with the drag chain, and abnormal sound and noise generated by the drag chain and the drag chain supporting mechanism are small, meanwhile, the abrasion and vibration of the drag chain are reduced, the service life of the drag chain is prolonged, the rubber coating roller is matched with the mandrel, the rubber coating roller is not easy to deform, and the stability of supporting the drag chain is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a state diagram of a drag chain support mechanism according to an embodiment of the present application;

fig. 2 is a schematic perspective view of a drag chain supporting mechanism according to an embodiment of the present application;

FIG. 3 is a vertical cross-sectional view of a tow chain support mechanism provided by an embodiment of the present application;

Fig. 4 is an enlarged view at a shown in fig. 3.

The main reference numerals illustrate:

100. A drag chain supporting mechanism; 200. a drag chain; 201. the upper section of the drag chain; 202. a lower section of the drag chain; 300. a guide rail beam; 400. a trolley; 10. a support base; 11. a support rod; 111. a mounting hole; 112. a connection hole; 113. a slot; 114. a first fixing hole; 12. distance rods; 20. a mandrel; 21. a limit groove; 22. a second fixing hole; 30. a rubber coating roller; 31. a roller body; 311. a step surface; 32. a flexible glue layer; 40. a bearing; 50. a fixing member; f1, a first direction; f2, a second direction; f3, third direction.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application 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 for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 4 together, a drag chain supporting mechanism 100 according to an embodiment of the application will be described, where the drag chain supporting mechanism 100 is used for supporting a drag chain 200.

Referring to fig. 2 and 3, the drag chain supporting mechanism 100 includes a supporting seat 10, a mandrel 20 and a rubber coating roller 30, wherein the supporting seat 10 is provided with a mounting hole 111, and the length of the mounting hole 111 extends in a strip shape along a first direction F1; one end of the mandrel 20 is connected with the top of the supporting seat 10, the axial direction of the mandrel 20 extends along a second direction F2, and the second direction F2 is perpendicular to the first direction F1; the rubber coating roller 30 comprises a roller body 31 and a flexible adhesive layer 32, wherein the roller body 31 is movably sleeved on the mandrel 20, the roller body 31 and the mandrel 20 are coaxially arranged, and the flexible adhesive layer 32 is coated on the peripheral surface of the roller body 31.

In this embodiment, the first direction F1 is a vertical direction, and the second direction F2 is a horizontal direction.

The mounting holes 111 on the support base 10 are penetrated by fasteners, that is, the fasteners are connected with the side wall of the mechanical equipment through the mounting holes 111, so that the drag chain support mechanism 100 is mounted on the mechanical equipment. Alternatively, the fasteners may be, but are not limited to, screws, bolts, and the like.

The mechanical equipment can be a digital printing machine, a numerical control machine tool, a manipulator, a lifting and transporting device, a medical imaging device and the like. In this embodiment, a digital printing machine is taken as an example of the mechanical device.

The cylinder body 31 is mainly made of metal, has high rigidity and good support, such as stainless steel, aluminum alloy, carbon steel galvanization, carbon steel chromium plating, carbon steel encapsulation and the like.

Alternatively, the material of the flexible glue layer 32 may be, but is not limited to, rubber, silica gel, sponge, polyurethane (PU), etc., so that the flexible glue layer 32 has good flexibility and cushioning and good vibration damping effect when contacting the drag chain 200.

Since the encapsulation roller 30 is movably sleeved on the mandrel 20 through the roller body 31, when the drag chain 200 passes through the encapsulation roller 30, the drag chain 200 can drive the encapsulation roller 30 to roll, so that rolling friction is formed between the drag chain 200 and the encapsulation roller 30, and the friction resistance of the rolling friction is generally only 1/40-1/60 of the friction resistance of sliding friction.

Compared with the prior art, the drag chain supporting mechanism 100 provided by the application has the advantages that the supporting seat 10 is detachably connected with the side wall of the mechanical equipment through the fastener penetrating through the mounting hole 111, and the length of the mounting hole 111 extends to be in a strip shape along the first direction F1, so that the height position of the supporting seat 10 mounted on the mechanical equipment can be finely adjusted along the direction parallel to the first direction F1 according to requirements; through being connected the top of dabber 20 and supporting seat 10, locate dabber 20 with roller body 31 movable sleeve for rubber coating cylinder 30 can rotate relative dabber 20, and rubber coating cylinder 30 includes roller body 31 and flexible glue film 32, thereby when rubber coating cylinder 30 supported drag chain 200, be rolling friction between drag chain 200 and the rubber coating cylinder 30, when drag chain 200 moves, drag chain 200 drives rubber coating cylinder 30 and rotates around the central axis of dabber 20, through wrapping flexible glue film 32 on the periphery surface of roller body 31, make flexible glue film 32 and drag chain 200 flexible contact, in this way, the abnormal sound that drag chain 200 produced with drag chain supporting mechanism 100, the noise is less, be favorable to reducing wear and vibration of drag chain 200 simultaneously, thereby be favorable to prolonging drag chain 200's life, and rubber coating cylinder 30 cooperates with dabber 20, be difficult for warping, be favorable to improving the stability to drag chain 200 supports.

In some embodiments of the present application, referring to fig. 3, the drag chain supporting mechanism 100 further includes a bearing 40, the bearing 40 is sleeved on the spindle 20, and the roller body 31 is sleeved on the bearing 40. The roller body 31 is movably sleeved on the mandrel 20 through the shaft sleeve, so that the encapsulation roller 30 is easier to rotate relative to the mandrel 20, and the resistance of the encapsulation roller 30 along with the dragging motion is facilitated.

Optionally, two bearings 40 are sleeved on the mandrel 20, the two bearings 40 are respectively located at two ends of the mandrel 20, and two ends of the roller body 31 are respectively sleeved on the two bearings 40. By arranging two bearings 40 between the roller body 31 and the mandrel 20, the stability of the rotation of the roller body 31 relative to the mandrel 20 is effectively ensured.

In some embodiments of the present application, referring to fig. 3 and 4, the mandrel 20 is provided with a limiting groove 21, the drag chain supporting mechanism 100 further includes a retainer ring (not shown) clamped in the limiting groove 21, the inner sidewall of the roller body 31 is provided with a step surface 311, and the bearing 40 is located between the step surface 311 and the retainer ring along the axial direction of the mandrel 20. Specifically, the retainer ring and the step surface 311 form a limit space along the axial direction of the mandrel 20, the bearing 40 is arranged in the limit space, the bearing 40 is effectively prevented from being separated from the mandrel 20 and the roller body 31 along the axial direction of the mandrel 20,

Optionally, the inner side walls at two opposite ends of the roller body 31 are respectively provided with a step surface 311, two opposite ends of the mandrel 20 are respectively provided with a limiting groove 21, the number of the two check rings is two, the two check rings are respectively clamped in the two limiting grooves 21, the two check rings respectively form two limiting spaces with the two step surfaces 311, and the two bearings 40 are respectively arranged in the two limiting spaces.

In some embodiments of the present application, the number of the mandrels 20 and the encapsulating rollers 30 is at least two, at least two mandrels 20 are disposed at intervals along a third direction F3, the third direction F3 is perpendicular to the first direction F1 and the second direction F2, and at least two encapsulating rollers 30 are movably sleeved on at least two mandrels 20 respectively.

Optionally, the number of the mandrels 20 and the number of the encapsulation rollers 30 are two, the third direction F3 is horizontal and longitudinal, and the third direction F3 is parallel to the motion direction of the drag chain 200 along with the trolley 400, so that the two mandrels 20 are arranged along the third direction F3, and the two encapsulation rollers 30 are respectively and movably sleeved on the two mandrels 20, which is favorable for improving the stability supported by the drag chain supporting mechanism 100, so that the drag chain 200 is not easy to droop, and has high applicability.

It should be noted that, the mandrel 20 and the encapsulation roller 30 may also be one, three, four, etc., as needed.

In some embodiments of the present application, referring to fig. 2, the support base 10 includes at least two support rods 11 and a distance rod 12 connected between the two support rods 11, one ends of at least two mandrels 20 are respectively connected with the tops of the at least two support rods 11, and each support rod 11 is provided with a mounting hole 111.

Alternatively, the number of the support rods 11 is two, wherein the length of the support rods 11 extends along the first direction F1, the two support rods 11 are oppositely arranged at intervals along the third direction F3, and the length of the distance rod 12 also extends along the third direction F3.

In some embodiments of the present application, the number of the mounting holes 111 on each support rod 11 may be one or more, and when the number of the mounting holes 111 on each support rod 11 is plural, the plurality of mounting holes 111 on each support rod 11 are arranged at intervals along the first direction F1.

Through offer a plurality of mounting holes 111 that set up along first direction F1 interval on each bracing piece 11, be favorable to promoting the stability that bracing piece 11 and mechanical equipment lateral wall are connected, effectively improve the stability that drag chain supporting mechanism 100 installed on mechanical equipment promptly to effectively prevent when drag chain 200 moves, drag chain supporting mechanism 100 produces great rocking, and then be favorable to promoting drag chain supporting mechanism 100 to drag chain 200 support's stability.

Alternatively, the number of the mounting holes 111 on each support rod 11 is two, and the two mounting holes 111 on each support rod 11 are arranged at intervals along the first direction F1.

In some embodiments of the present application, each support rod 11 is provided with a connecting hole 112, and two ends of the distance rod 12 are respectively inserted into the connecting holes 112 on two adjacent support rods 11.

Alternatively, the two ends of the distance rod 12 are respectively provided with external threads, the connecting holes 112 are threaded holes, and the two ends of the distance rod 12 are respectively connected with the threaded holes on the two adjacent support rods 11 in a threaded fit manner through the external threads, so that the distance rod 12 is detachably connected with the support rods 11, and the distance rods 12 and the connecting holes 112 are movably sleeved, so that the distance rods 12 with different lengths can be adopted to connect the two support rods 11, the distance between the two support rods 11 can be adjusted, and the distance between the two encapsulation rollers 30 can be adjusted, so as to support drag chains 200 of different types.

Of course, in some embodiments, the distance rod 12 may be in interference fit with the connection hole 112, which is advantageous for improving the stability of the connection between the distance rod 12 and the support rod 11 by having the distance rod 12 in interference fit with the connection hole 112.

In some embodiments of the present application, the number of distance rods 12 is plural, and the plurality of distance rods 12 are spaced apart along the first direction F1. By adopting a plurality of distance rods 12 to connect two adjacent support rods 11, the stability of the whole structure of the support base 10 is guaranteed.

Alternatively, the number of the distance rods 12 is two, and the two distance rods 12 are arranged in parallel at intervals along the first direction F1.

It should be noted that, the number of the connection holes 112 on each support rod 11 is equal to the number of the distance rods 12, and it is understood that when the number of the distance rods 12 is two, the number of the connection holes 112 on each support rod 11 is also two, and the two connection holes 112 on one support rod 11 are respectively in one-to-one correspondence with the two connection holes 112 on the other support rod 11.

In some embodiments of the present application, referring to fig. 3, a slot 113 and a first fixing hole 114 are provided at the top of each supporting rod 11, the first fixing hole 114 is communicated with the slot 113, one end of each mandrel 20 is respectively inserted into the slot 113 of each supporting rod 11, one end of each mandrel 20 is provided with a second fixing hole 22 correspondingly communicated with the first fixing hole 114, and the first fixing hole 114 and the second fixing hole 22 are respectively provided for the fixing piece 50 to pass through.

Through inserting the one end of each mandrel 20 into the slot 113 of each supporting rod 11 respectively, and through opening the first fixed hole 114 on each supporting rod 11, opening the second fixed hole 22 on the one end of each mandrel 20, the second fixed holes 22 of each mandrel 20 are respectively communicated with the first fixed holes 114 on each supporting rod 11 in a one-to-one correspondence manner, and then the fixing piece 50 is adopted to penetrate through the corresponding communicated first fixed holes 114 and second fixed holes 22, so that the mandrels 20 are fixedly connected with the supporting rods 11, and the connection reliability of the mandrels 20 and the supporting rods 11 is improved.

Alternatively, the mandrel 20 may also be an interference fit with the slot 113. The fasteners 50 may be, but are not limited to, screws, bolts, and the like.

Referring to fig. 1, the present application further provides a digital printing machine, which includes a guide rail beam 300, a trolley 400, a drag chain 200, and a drag chain supporting mechanism 100 according to any of the foregoing embodiments, wherein the trolley 400 is movably disposed on the guide rail beam 300 and can reciprocate along the guide rail beam 300, the drag chain 200 is disposed on one side of the guide rail beam 300, one end of the drag chain 200 is connected with the trolley 400, and a supporting seat 10 of the drag chain supporting mechanism 100 is connected with a side wall of the guide rail beam 300 through a mounting hole 111 and is supported on the drag chain 200 through an encapsulation roller 30.

The guide rail beam 300 is provided with a guide rail, the guide rail extends along the third direction F3, the trolley 400 is slidably arranged on the guide rail, and the trolley 400 is provided with a printing nozzle and a control unit. The drag chain 200 serves to protect wires, cables, air pipes, liquid pipes connecting the trolley 400 and/or the control unit and to maintain a stable path during the reciprocating motion.

When the printing work is performed, the trolley 400 drives the printing spray head to reciprocate along the guide rail, the printing spray head performs ink-jet printing on the printing medium, and as one end of the drag chain 200 is connected with the trolley 400, the trolley 400 drives the drag chain 200 to perform corresponding movement when moving. In the process that the drag chain 200 moves back and forth along with the trolley 400, the drag chain 200 sags or the drag chain 200 breaks under the action of gravity of the electric wire, the electric cable, the air pipe, the liquid pipe and the drag chain 200, so that when the drag chain upper section 201 passes over the drag chain lower section 202, the drag chain support mechanism 100 supports the drag chain upper section 201, and the drag chain upper section 201 is effectively prevented from sagging or breaking.

According to the digital printing machine provided by the application, the drag chain supporting mechanism 100 is adopted, when the drag chain 200 moves through the rubber coating roller 30, the drag chain 200 drives the rubber coating roller 30 to rotate around the central axis of the mandrel 20, so that rolling friction is generated between the drag chain 200 and the rubber coating roller 30, and the flexible rubber layer 32 is coated on the peripheral surface of the roller body 31, so that the flexible rubber layer 32 is in flexible contact with the drag chain 200, abnormal sound and noise generated by the drag chain 200 and the drag chain supporting mechanism 100 are small, meanwhile, abrasion and vibration of the drag chain 200 are reduced, the service life of the drag chain 200 is prolonged, the rubber coating roller 30 is matched with the mandrel 20, deformation is not easy, and the stability of supporting the drag chain 200 is improved.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. A tow chain support mechanism, comprising:

the support seat is provided with a mounting hole, and the length of the mounting hole extends in a strip shape along the first direction;

The mandrel, one end of the mandrel is connected with the top of the supporting seat, the axial direction of the mandrel extends along a second direction, and the second direction is perpendicular to the first direction; and

The rubber coating cylinder comprises a cylinder body and a flexible adhesive layer, wherein the cylinder body is movably sleeved on the mandrel, the cylinder body and the mandrel are coaxially arranged, and the flexible adhesive layer is coated on the peripheral surface of the cylinder body.

2. The tow chain support mechanism of claim 1, wherein: the drag chain supporting mechanism further comprises a bearing, the bearing is sleeved on the mandrel, and the roller body is sleeved on the bearing sleeve.

3. The tow chain support mechanism of claim 2, wherein: the utility model discloses a drag chain support mechanism, including the spool, the dabber is equipped with the spacing groove, drag chain supporting mechanism still includes the card and establishes the retaining ring in the spacing groove, have the step face on the inside wall of barrel, the bearing is located along the axial of dabber the step face with between the retaining ring.

4. A drag chain support mechanism as claimed in any one of claims 1 to 3, wherein: the number of the core shafts and the number of the rubber coating rollers are at least two, at least two core shafts are arranged at intervals along a third direction, the third direction is perpendicular to the first direction and the second direction, and at least two rubber coating rollers are respectively movably sleeved on at least two core shafts.

5. The tow chain support mechanism of claim 4, wherein: the support base comprises at least two support rods and a distance rod connected between the two support rods, one end of at least two mandrels is respectively connected with the tops of at least two support rods, and each support rod is provided with a mounting hole.

6. The tow chain support mechanism of claim 5, wherein: the number of the mounting holes on each supporting rod is one or more, and when the number of the mounting holes on each supporting rod is a plurality of the mounting holes, the plurality of the mounting holes on each supporting rod are arranged at intervals along the first direction.

7. The tow chain support mechanism of claim 5, wherein: the top of each supporting rod is provided with a slot and a first fixing hole, one end of each mandrel is respectively inserted into the slot of each supporting rod, one end of each mandrel is provided with a second fixing hole which is correspondingly communicated with the first fixing hole, and the first fixing hole and the second fixing hole are used for the fixing piece to penetrate through.

8. The tow chain support mechanism of claim 5, wherein: and the two ends of each distance rod are respectively inserted into the connecting holes on the two adjacent support rods.

9. The tow chain support mechanism of claim 8, wherein: external threads are arranged at two ends of the distance rod, the connecting holes are threaded holes, and two ends of the distance rod are in threaded fit connection with threaded holes on two adjacent support rods through the external threads respectively.

10. The digital printing machine is characterized by comprising a guide rail beam, a trolley, a drag chain and the drag chain supporting mechanism according to any one of claims 1-9, wherein the trolley is movably arranged on the guide rail beam and can reciprocate along the guide rail beam, one end of the drag chain is connected with the trolley, and the supporting seat of the drag chain supporting mechanism is connected with the guide rail beam through the mounting hole and is supported on the drag chain through the encapsulation roller.