CN214296620U

CN214296620U - Automatic film coating equipment for lamp tube

Info

Publication number: CN214296620U
Application number: CN202022721656.6U
Authority: CN
Inventors: 朱武良; 许问津; 刘波; 杨锐; 陈瑞祥
Original assignee: Foshan Electrical and Lighting Co Ltd
Current assignee: Foshan Electrical and Lighting Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-09-28
Anticipated expiration: 2030-11-23

Abstract

The utility model relates to an electric light source product production facility field, more specifically says, and it relates to an automatic mantle membrane equipment of fluorescent tube, and the technical essential is: the device comprises a traction type film sleeving device, wherein the traction type film sleeving device comprises a first lamp tube conveying mechanism for bearing an explosion-proof film and completing film sleeving, and a traction rod for drawing the lamp tube film sleeving is arranged on the traction mechanism; the rupture membrane cutting and conveying device is used for cutting the rupture membrane and conveying the cut rupture membrane to the specified position of the first conveying mechanism; and the automatic pipe conveying device is arranged on the side surface of the first conveying mechanism in the conveying direction. The utility model discloses can realize the automatic mantle of fluorescent tube, have reduce intensity of labour, improve production efficiency can, large-scale production improves advantages such as mantle quality simultaneously.

Description

Automatic film coating equipment for lamp tube

Technical Field

The utility model relates to an electric light source product production facility field, more specifically says that it relates to an automatic mantle membrane equipment of fluorescent tube.

Background

As is well known, the conventional incandescent lamp is gradually replaced by an energy-saving lamp with a cold light source due to the disadvantages of high energy consumption, large heat generation and the like, the shape and the size of the LED lamp tube are the same as those of the conventional fluorescent lamp, and the LED lamp tube can be used for a long time without replacement, so that the labor cost is reduced, and the LED lamp tube becomes a new illumination lamp. For protecting the lamp tube, preventing the surface of the lamp tube from being stained during transportation, production and storage, or preventing the lamp tube from bursting, an explosion-proof film needs to be sleeved outside the lamp tube.

At present, most of the explosion-proof membranes of the lamp tube sleeves are manually finished by workers, firstly, the explosion-proof membranes are cut into proper lengths and conveyed to a specified position to be placed, secondly, the membrane openings of the explosion-proof membranes are opened, one end of each lamp tube penetrates through the explosion-proof membranes, then the explosion-proof membranes are pulled to the other end face to complete the membrane covering work of one lamp tube, and finally, the explosion-proof membranes are conveyed to the specified position to be placed, and the work is repeated and repeated.

The above scheme has the defects that: the labor intensity is high, the production efficiency is low, the automation degree is low, the production cost is high, the manual operation speed is low, the production efficiency is low, the size stability of the manually cut explosion-proof membrane is poor, the material waste is often caused, and the working efficiency is low, so the improvement is needed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a towed covering membrane device, the utility model discloses can realize the automatic covering membrane of fluorescent tube, have reduce intensity of labour, improve production efficiency can, large-scale production improves advantages such as covering membrane quality simultaneously.

The above technical purpose of the present invention can be achieved by the following technical solutions: an automatic lamp tube film coating device comprises:

the traction type film covering device comprises a first conveying mechanism and a traction mechanism, wherein the first conveying mechanism is used for bearing an explosion-proof film and a lamp tube for film covering, the traction mechanism is arranged on one side of the first conveying mechanism, and the traction mechanism is provided with a traction rod for traction of the lamp tube film covering;

and the rupture membrane cutting and conveying device is arranged on one side of the first conveying mechanism and used for cutting the rupture membrane and conveying the cut rupture membrane to the designated position of the first conveying mechanism.

And the automatic pipe conveying device is arranged on one side of the first conveying mechanism, and the automatic pipe conveying device and the traction mechanism are arranged on two opposite side surfaces.

In one embodiment, the traction type film covering device further comprises an auxiliary beam mechanism erected on the first conveying mechanism, the auxiliary beam mechanism is provided with a sucker group and an explosion-proof film positioning group which correspond to each other in position, and the sucker group is installed on one side close to the traction mechanism.

In one embodiment, the end of the traction rod pointing to the first conveying mechanism is a straight-line-shaped tip, the end of the straight-line-shaped tip is provided with two round holes for positioning when the lamp tube penetrates, the other end of the straight-line-shaped tip is cylindrical, and the traction rod is gradually changed into the cylindrical shape from the straight-line-shaped tip of the tip.

In one embodiment, a vent hole is formed in the traction rod, and the vent hole blows air to the interior of the explosion-proof membrane through the straight-line-shaped tip.

In one embodiment, the rupture membrane cutting and conveying device comprises a supporting table, wherein the supporting table comprises a bottom plate and two side plates which are arranged on the surface of the bottom plate at intervals, an rupture membrane reel is rotatably arranged between the two side plates, an inner cavity is arranged at one end face, far away from the rupture membrane reel, of the supporting table, the inner cavity is provided with a pushing pressure wheel set and a cutter connected with a piston type pressure cylinder, and the pushing pressure wheel set is composed of an upper pressure wheel and a lower pressure wheel which are mutually abutted.

In one embodiment, the lower pressing wheel is connected with a driving motor through a rotating chain, two ends of the upper pressing wheel are in threaded connection with height adjusting buttons, the lower pressing wheel is electrically connected with the piston type pressure cylinder through a controller, and the controller is used for recording the number of revolutions of the lower pressing wheel and calculating the length of the conveying rupture membrane.

In one embodiment, the automatic tube conveying device comprises a second conveying mechanism, the second conveying mechanism is used for carrying the lamp tubes and pushing the glass lamp tubes to convey the glass lamp tubes to the designated positions, a lifting positioning mechanism capable of ascending and descending is arranged in the second conveying mechanism, a third conveying mechanism capable of reciprocating along the axial center direction of the beam is arranged on the supporting beam above the second conveying mechanism, and the third conveying mechanism is provided with a manipulator for grabbing the side ends of the lamp tubes and used for pushing the lifted lamp tubes to the traction type film sleeving device to move and sleeve the explosion-proof film.

In one embodiment, the second conveying mechanism is provided with a lamp tube accommodating groove for clamping the glass lamp tube, the lamp tube accommodating groove comprises two groove walls perpendicular to the second conveying mechanism, and the height of the groove wall at the front end in the rotating direction of the second conveying mechanism is smaller than that of the groove wall at the rear end.

In one embodiment, the tube inlet end of the automatic tube feeding device is further connected with a lamp tube dispensing device, and the lamp tube dispensing device is provided with a conveyor belt for conveying the lamp tubes to the second conveying mechanism and an extension plate for bearing the lamp tubes and inclining downwards to the conveyor belt.

In one embodiment, the traction type film covering device, the rupture film cutting and conveying device and the automatic pipe conveying device are electrically connected with a control controller, and the controller is used for controlling the working linkage among the traction type film covering device, the rupture film cutting and conveying device and the automatic pipe conveying device.

To sum up, the utility model discloses following beneficial effect has:

firstly, the utility model can realize the movement of the lamp tube among different machines and can adjust the height according to the height difference between the adjacent machines, and the equipment can continuously complete a series of actions of cutting, sending and sleeving the film to automatically complete the production of sleeving the lamp tube into the explosion-proof film;

secondly, the explosion-proof membrane is automatically cut by a machine and conveyed to a designated position to be placed, the explosion-proof membrane product is efficiently and quickly cut, the efficiency is improved, and the quality of the final product is ensured;

thirdly, a draw bar is arranged, one end part of a rod head of the draw bar is a straight-line-shaped tip, so that the film covering opening can be spread to form a pipe shape and can be directly sleeved on the lamp tube, thereby realizing the purposes of reducing the labor intensity and improving the production efficiency. Has the advantages of saving labor, improving production efficiency and leveling rate in the process of producing and assembling the lamp tube

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a right side view of the traction type film covering device of the present invention;

FIG. 4 is a perspective view of a traction mechanism in the traction type film covering device of the present invention;

FIG. 5 is a front view of an auxiliary beam mechanism in the traction type film covering device of the present invention;

FIG. 6 is a left side view of the rupture disk cutting device of the present invention;

FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;

FIG. 8 is a perspective view of the automatic pipe feeding device according to the present invention;

FIG. 9 is a front view of the automatic pipe feeding device according to the present invention;

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 9;

fig. 11 is a left side view of the pulling lamp tube dispensing device of the present invention.

In the figure: 1. a traction type film covering device; 11. a first conveying mechanism; 12. a traction mechanism; 121. a draw bar; 13. an auxiliary beam mechanism; 131. a sucker group; 132. an explosion-proof membrane positioning group; 2. the rupture disk cutting and conveying device; 21. a support table; 211. a side plate; 22. an explosion-proof membrane reel; 23. a pressing wheel group; 231. an upper pinch roller; 232. a lower pinch roller; 24. a cutter; 25. rotating the chain; 26. a drive motor; 27. a piston-type pressure cylinder; 28. a height adjusting knob; 3. an automatic pipe conveying device; 31. a second conveying mechanism; 32. a lifting and positioning mechanism; 33. a third conveying mechanism; 331. a manipulator; 34. a lamp tube accommodating groove; 4. a lamp tube issuing device; 41. an extension plate; 42. and (4) a conveyor belt.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 4, an automatic film coating apparatus for lamp tube includes:

the traction type film covering device 1 comprises a first conveying mechanism 11 and a traction mechanism 12, wherein the first conveying mechanism 11 is used for bearing an explosion-proof film and a lamp tube for film covering, the traction mechanism 12 is arranged on one side of the first conveying mechanism 11, and the traction mechanism 12 is provided with a traction rod 121 for traction of the lamp tube film covering;

and the rupture disk cutting and conveying device 2 is arranged on one side of the first conveying mechanism 11 and is used for cutting the rupture disk and conveying the cut rupture disk to a specified position of the first conveying mechanism 11.

The automatic pipe conveying device 3 is arranged on the side, opposite to the traction mechanism 12, of the first conveying mechanism 11. Specifically, the traction-type film covering device 1 further comprises an auxiliary beam mechanism 13 erected on the first conveying mechanism 11, the auxiliary beam mechanism 13 is provided with a suction cup group 131 and an explosion-proof film positioning group 132 which correspond to each other in position, and the suction cup group 131 is installed on one side close to the traction mechanism 12.

As shown in fig. 5, according to the above scheme, when the rupture membrane reaches a designated position, the suction cup group 131 opens one end of the rupture membrane, so that the traction rod 121 can be inserted into the rupture membrane to fully open the rupture membrane, the rupture membrane positioning group 132 is provided with a circular hole for bearing cylindrical explosion protection, the position of the rupture membrane is fixed, and a lamp tube can be conveniently inserted into the rupture membrane.

Specifically, the end of the traction rod 121 pointing to the first conveying mechanism 11 is a straight pointed end, two round holes for positioning when the lamp tube penetrates are arranged at the end of the straight pointed end, the other end of the straight pointed end is cylindrical, and the traction rod 121 gradually changes from the straight pointed end of the pointed end into the cylindrical shape.

Through the scheme, the straight-line-shaped tip is easier to insert into the explosion-proof membrane compared with the round head of the cylinder, the tip can be a conical tip or an irregular tip, so that the insertion is facilitated, and meanwhile, when the traction rod 121 and the lamp tube move synchronously, two pins at one end of the lamp tube are inserted into two round holes to further fix the lamp tube.

Specifically, a vent hole is formed in the traction rod 121, and the vent hole blows air into the explosion-proof membrane through a straight-line-shaped tip.

Through above-mentioned scheme, after the translation pole removed and got into in the rupture membrane, the air vent was blown to the past from the sharp-pointed end of style of calligraphy, and the supplementary rupture membrane that struts on the sharp-pointed moving direction of style of calligraphy.

Specifically, rupture membrane surely send device 2, including a supporting bench 21, a supporting bench 21 includes that bottom plate and two intervals set up the side board 211 on the bottom plate surface, rotationally is provided with rupture membrane reel 22 between two side boards 211, and a supporting bench 21 one end terminal surface of keeping away from rupture membrane reel 22 is provided with the inner chamber, and the inner chamber is provided with propelling movement pinch roller group 23 and the cutter 24 that links to each other with piston pressure cylinder 27, and propelling movement pinch roller group 23 comprises last pinch roller 231 and the lower pinch roller 232 of mutual conflict.

As shown in fig. 6-7, according to the above-mentioned scheme, when the rupture membrane needs to be cut and fed, the rupture membrane reel 22 with the rupture membrane mounted thereon is placed on the supporting table 21 on the rupture membrane cutting and feeding device 2, the rupture membrane is pulled to pass through the middle of the upper pressing wheel 231 and the lower pressing wheel 232 and is placed under the crossing of the cutting knife 24, the pressing wheel set 23 is started, the upper pressing wheel 231 and the lower pressing wheel 232 rotate, the rupture membrane is pulled to be conveyed out from the lower part of the cutting knife 24, and when the rupture membrane reaches the required length, the cutting knife 24 performs cutting work to cut off the rupture membrane, thereby completing the cutting and feeding work of the rupture membrane.

Preferably, the lower pressing wheel 232 is connected with the driving motor 26 through a rotating chain 25, the two ends of the upper pressing wheel 231 are in threaded connection with the height adjusting buttons 28, the lower pressing wheel 232 is electrically connected with the piston type pressure cylinder 27 through a controller, and the controller is used for recording the revolution number of the pressing wheel 232 and calculating the length of the conveying rupture membrane.

Through the scheme, the controller is adopted to calculate the revolution of the lower pressing wheel 232, so that the length of the rupture membrane is obtained, and when the required rupture membrane length is obtained, the cutting knife 24 is controlled to cut, so that the rupture membrane with qualified and identical length is obtained.

Specifically, the automatic tube feeding device 3 comprises a second conveying mechanism 31, the second conveying mechanism 31 is used for bearing the lamp tubes and pushing the glass lamp tubes to be conveyed to a specified position, a lifting positioning mechanism 32 capable of ascending and descending is arranged in the second conveying mechanism 31, a third conveying mechanism 33 capable of reciprocating along the axial center direction of the beam is arranged on a supporting beam above the second conveying mechanism 31, and a manipulator 331 for grabbing the side end of the lamp tubes is arranged on the third conveying mechanism and used for pushing the lifted lamp tubes to the traction type film sleeving device 1 to move and sleeve the explosion-proof film.

As shown in fig. 8-10, according to the above-mentioned scheme, the tube is conveyed to the vertical lower part of the manipulator 331 by the second conveying mechanism 31 on the automatic tube conveying device 3, the lifting and positioning mechanism 32 is lifted upwards, the tube is lifted to the same horizontal position of the manipulator 331 together when passing through the second conveying mechanism 31, the manipulator 331 grabs one end of the tube and moves to the second conveying mechanism 31, and the tube is sleeved in the explosion-proof membrane.

Preferably, the second conveying mechanism 31 is provided with a lamp holding groove 34 for holding the glass lamp, the lamp holding groove 34 has two groove walls perpendicular to the second conveying mechanism 31, and the height of the groove wall at the front end in the rotating direction of the second conveying mechanism 31 is smaller than that of the groove wall at the rear end.

Through the above scheme, the wall of the lamp accommodating groove 34 located at the rear end in the rotation direction of the second conveying mechanism 31 is higher, and when the lamp is conveyed through the inclined plane, the wall of the long groove can protect the lamp inside the groove, so that the lamp is prevented from being damaged due to the fact that the lamp is separated from the lamp accommodating groove 34 under the action of gravity.

Specifically, a lamp tube dispensing device 4 is connected to the outside of the tube inlet end of the traction-type film covering mechanism 1, and the lamp tube dispensing device 4 is provided with a conveyor belt 42 connected with the second conveying mechanism 31 and used for conveying lamp tubes and an extension plate 41 used for bearing the lamp tubes and inclined downwards to the conveyor belt 42.

The tube inlet end of the automatic tube feeding device 3 is further connected with a lamp tube dispensing device 4, and the lamp tube dispensing device 4 is provided with a conveyor belt 42 for conveying the lamp tubes to the second conveying mechanism 31 and an extension plate 41 for carrying the lamp tubes and inclining downwards to the conveyor belt 42.

As shown in fig. 11, by the above scheme, the light tubes are driven to slide towards the conveyor belt 42 by the self gravity of the extension plate 41 inclined downwards to the conveyor belt 42, the light tubes enter the conveyor belt 42 from the input end of the conveyor belt 42, climb and descend along with the conveyor belt 42, slide out from the output end and enter the second conveying mechanism 31, and the conveying mode solves the problem of manual conveying of the light tubes by workers and reduces the labor intensity of the workers.

Specifically, the traction type film covering device 1, the rupture film cutting and conveying device 2 and the automatic pipe conveying device 3 are electrically connected with a control controller, and the controller is used for controlling the traction type film covering device, the rupture film cutting and conveying device 2 and the automatic pipe conveying device 3 to work and link.

Through above-mentioned scheme, work between the three device of controller linkage goes on, guarantees the smoothness degree of work between each device on the one hand, and on the other hand can also be when certain device goes wrong, and other devices stop work can in time be controlled to the controller.

The implementation principle of the embodiment is as follows:

firstly, straightening, cutting to length and cutting off a whole roll of flat anti-explosion membrane sleeve by an anti-explosion membrane cutting and conveying device 2, conveying the cut anti-explosion membrane sleeve to a specified position on a station plate of a first conveying mechanism 11, conveying the membrane to a membrane covering working position by the first conveying mechanism 11, and pausing the operation of the first conveying mechanism 11;

step two, the automatic tube conveying device 3 arranged at the right side of the first conveying mechanism 11 conveys the lamp tubes to the relative position of the working position of the film covering, and the lamp tubes are jacked up and positioned by the lifting positioning mechanism;

step three, inserting a draw bar 121 in the traction type film sleeving device 1 into a left port of the explosion-proof film at the film sleeving working position in the step one, moving the draw bar to the right to penetrate and stretch out the whole explosion-proof film, and stopping the operation, wherein the lamp tube reaching the opposite position in the step two is pushed to be in butt joint with two positioning holes at the end part of the draw bar 121 in the traction type film sleeving device 1: the traction rod 121 retreats from the anti-explosion film tube leftwards, the automatic tube feeding device 3 pushes the lamp tube to synchronously enter leftwards from the right end opening of the anti-explosion film until the lamp tube is sleeved with the film, the traction rod 121 retreats to the starting point of the left end of the traction mechanism 12 to complete a round of film sleeving action, and the first conveying mechanism 11 is started to repeat the previous work flow. Wherein, the first step and the second step can be synchronously carried out without any sequence. The utility model adopts the design of three stations, and three tubes can be sleeved at each time.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An automatic film coating device for a lamp tube is characterized by comprising:

the rupture membrane cutting and conveying device is arranged on one side of the first conveying mechanism and used for cutting the rupture membrane and conveying the cut rupture membrane to the specified position of the first conveying mechanism;

2. The automatic lamp tube film coating equipment as claimed in claim 1, wherein the traction type film coating device further comprises an auxiliary beam mechanism erected on the first conveying mechanism, the auxiliary beam mechanism is provided with a suction disc group and an explosion-proof film positioning group which correspond in position, and the suction disc group is arranged on one side close to the traction mechanism.

3. The automatic lamp tube film coating equipment as claimed in claim 1, wherein the end of the draw bar pointing to the first conveying mechanism is a straight pointed end, the end of the straight pointed end is provided with two round holes for positioning when the lamp tube penetrates, the other end is cylindrical, and the draw bar is gradually changed into the cylindrical shape from the straight pointed end of the pointed end.

4. The automatic lamp tube film sleeving device as claimed in claim 3, wherein a vent hole is formed in the traction rod, and the vent hole blows air into the explosion-proof film through the straight-line-shaped tip.

5. The lamp tube automatic film covering device as claimed in claim 1, wherein the rupture film cutting device comprises a supporting table, the supporting table comprises a bottom plate and two side plates which are arranged on the surface of the bottom plate at intervals, an rupture film reel is rotatably arranged between the two side plates, an inner cavity is arranged at one end face of the supporting table far away from the rupture film reel, the inner cavity is provided with a pushing pressure wheel set and a cutting knife connected with a piston type pressure cylinder, and the pushing pressure wheel set comprises an upper pressure wheel and a lower pressure wheel which are mutually abutted.

6. The automatic lamp tube film sleeving device according to claim 5, wherein the lower pressing wheel is connected with a driving motor through a rotating chain, two ends of the upper pressing wheel are in threaded connection with height adjusting buttons, the lower pressing wheel is electrically connected with the piston type pressure cylinder through a controller, and the controller is used for recording the number of revolutions of the lower pressing wheel and calculating the length of the conveying rupture film.

7. The automatic lamp tube film covering equipment according to claim 1, wherein the automatic tube feeding device comprises a second conveying mechanism, the second conveying mechanism is used for carrying the lamp tubes and pushing the glass lamp tubes to be conveyed to a designated position, a lifting and positioning mechanism capable of lifting up and down is arranged in the second conveying mechanism, a third conveying mechanism capable of reciprocating along the axial center direction of the beam is arranged on the supporting beam above the second conveying mechanism, and the third conveying mechanism is provided with a manipulator for grabbing the side ends of the lamp tubes and pushing the lifted lamp tubes to the traction type film covering device to be moved and covered on the explosion-proof film.

8. The apparatus for automatically coating a lamp tube according to claim 7, wherein the second conveying mechanism is provided with a lamp tube accommodating groove for holding the glass lamp tube, the lamp tube accommodating groove has two groove walls perpendicular to the second conveying mechanism, and a height of a front groove wall in a rotational direction of the second conveying mechanism is smaller than a height of a rear groove wall.

9. The automatic lamp tube film coating equipment according to claim 1, wherein the tube feeding end of the automatic tube feeding device is further connected with a lamp tube dispensing device, and the lamp tube dispensing device is provided with a conveyor belt for conveying the lamp tubes to the second conveying mechanism and an extension plate for carrying the lamp tubes and inclining downwards to the conveyor belt.

10. The automatic lamp tube film covering equipment as claimed in any one of claims 1 to 9, wherein the traction type film covering device, the rupture film cutting and conveying device and the automatic tube conveying device are electrically connected with a controller, and the controller is used for controlling the working linkage among the traction type film covering device, the rupture film cutting and conveying device and the automatic tube conveying device.