CN103407636A - A test tube labeling machine - Google Patents

Abstract

The invention discloses a test tube labeling machine, which aims at overcoming manual labor; it is mainly composed of a pressure roller mechanism, a main and auxiliary roller mechanism, a clamping device and a laser anti-loosening device; the pressure roller mechanism is mainly supported by the No. 1 pressure roller plate, the pressure roller bracket on the No. 2 pressure roller support plate, the pressure roller and the grip roller installed on the pressure roller support through bearings, and the No. 1 slide that is slidingly connected with the No. The groove plate, the No. 2 chute plate and the travel switch fixed on the base plate and in contact with the end of the pressure roller bracket; the main and auxiliary roll mechanism is mainly composed of the main roll, the auxiliary roll, and the main roll motor installed on the front of the base plate through the frame. The rotary shaft installed under the bottom plate through the bearing is composed of a rotary shaft motor connected with the rotary shaft through belt transmission; the test tube labeling machine of the present invention can be matched with a variety of barcode printers, and can label products with different diameters Processing, simple structure, convenient debugging, high labeling efficiency.

Description

A test tube labeling machine

technical field

The present invention relates to a labeling device, more specifically, the present invention relates to a test tube labeling machine.

Background technique

At present, there are many kinds of labeling machines, which are widely used in pharmaceutical industry, daily chemical industry, food industry, beverage industry, electronics and battery industry, petrochemical industry and medical industry, etc. It is an ideal equipment for high-precision and accurate labeling on small-sized materials such as circuit boards, automotive precision parts, cartons, magazines, mobile phone batteries, medicines, and daily chemicals, making product labels more beautiful.

Although there are many kinds of barcode printers on the market, the labels must be manually torn off from the supporting paper and then pasted on the product. Maintain barcode consistency.

Contents of the invention

The problem to be solved by the present invention is to overcome manual labor and provide a new type of test tube labeling machine, which can quickly and accurately stick the label on the designated position on the surface of the test tube, realize automatic labeling, and have high labeling efficiency, safety, sanitation, and Convenient, the label is beautiful and consistent.

In order to solve the above-mentioned technical problems, the present invention is realized by adopting the following technical solutions, which are described as follows in conjunction with the accompanying drawings:

A test tube labeling machine, mainly composed of a pressure roller mechanism, a main and auxiliary roller mechanism, a left and right symmetrical clamping device 4 installed at the center of the rear of the bottom plate 5, and a laser anti-loosening device 18 fixed on the frame 13. The pressure roller mechanism is symmetrically installed on both sides of the bottom plate 5, and the pressure roller mechanism is mainly composed of the pressure roller bracket 6 installed on the No. 1 pressure roller support plate 2 and No. The pressure roller 8 and the grip roller 10 on the support 6, the No. 1 chute plate 3 and the No. 2 chute plate 7 which are slidingly connected with the No. 1 pressure roller support plate 2 and No. It is composed of travel switch 1 that is in contact with the end of pressure roller bracket 6; the main and auxiliary roller mechanism is mainly composed of main roller 12, auxiliary roller 11, and main roller motor 14 installed on the front of bottom plate 5 through frame 13, and installed through bearings. The rotary shaft 16 below the base plate 5 is composed of a rotary shaft motor 15 connected with the rotary shaft 16 through a belt drive.

The frame 13 described in the technical solution is made up of No. 1 frame wall 32, No. 2 frame wall 39 and crossbeam 33; On both sides, the upper left corners of No. 1 rack wall 32 and No. 2 rack wall 39 are respectively provided with No. 1 rack wall arc-shaped channel 23 and No. 2 rack wall arc-shaped channel, and No. 1 rack wall arc-shaped channel. The right side of the through groove 23 and the arc-shaped through groove of the No. 2 frame wall are respectively provided with the No. 1 frame wall through-hole 19 for installing the main roller 12 and the No. 2 frame wall through-hole. Positioning pin 26 is arranged between groove 23 and No. 1 frame wall through hole 19; The two ends of beam 33 are fixedly connected with the middle part of No. 1 frame wall 32 and No. 2 frame wall 39 insides.

In the technical solution, the travel switch 1 is set on the side of the No. 1 pressure roller support plate 2; the No. 1 chute plate 3 and No. 2 chute plate 7 are symmetrically fixed on the left and right sides of the upper surface of the bottom plate 5 .

In the technical solution, the main roller 12 is rotated by the main roller motor 14 installed on the beam 33 of the frame 13 through a belt drive; Structure; base plate 5 front middle is provided with notch 17; Rotary shaft 16 is positioned at the below of notch 17;

The clamping device 4 described in the technical solution is composed of a long bolt rotating rod 27, a long bolt support plate 28, a long bolt 29 and a long bolt top plate 30; the long bolt support plate 28 is symmetrically fixed on the central part of the rear of the bottom plate 5; The long bolt 29 passes through the long bolt support plate 28 and is threadedly connected with the long bolt support plate 28. One end of the long bolt 29 is fixedly connected with the long bolt top plate 30, and the other end is fixedly connected with the long bolt rotating rod 27.

The laser anti-loosening device 18 described in the technical solution is made up of a laser 34, a spring return device support plate 35, a spring return device 36 and a laser receiver 37; Composition, the front end of the pin shaft 41 is a cone 43, the end of the pin shaft 41 is a short cylinder 40, the cone 43 and the pin shaft 41 are integrated, the short cylinder 40 and the pin shaft 41 are fixedly connected, the short cylinder 40 and the spring 42 are respectively Installed on both sides of the spring return device support plate 35; the spring 42 is sleeved on the pin shaft 41, the front end of the spring 42 is in contact with the bottom surface of the cone 43, and the end of the spring 42 is in contact with the spring return device support plate 35; the laser 34, the spring return device support The plate 35 and the laser receiver 37 are sequentially fixed on the beam 33 of the frame 13, and the spring return device 36 is installed on the support plate 35 of the spring return device through clearance fit.

No. 1 positioning boss 22 and No. 2 positioning boss 24 are respectively fixed on the upper left sides of No. 1 frame wall 32 and No. 2 frame wall 39 described in the technical solution.

The gap between the main roller 12 and the auxiliary roller 11 is less than the diameter of the test tube 21; adjust the distance between the auxiliary roller 11 and the main roller 12 to ensure that the upper edge line of the test tube 21 and the paper output position of the paper outlet of the barcode printer 20 are within on the same level.

The pressure roller 8 in the technical solution rotates together with the test tube 21 during the labeling process; the grip roller 10 controls the pressure roller 8 to press the test tube 21 downward; 3 slides in the chute, the No. 2 pressure roller support plate 9 slides in the chute of the No. 2 chute plate 7, and adjusts the space position of the centerline of the pressure roller 8 so that the centerline of the pressure roller 8 is located between the centerline of the test tube 21 and the centerline of the test tube 21. between the centerlines of the main rollers 12.

Compared with prior art, the beneficial effects of the present invention are:

1. The test tube labeling machine of the present invention can effectively improve the efficiency of labeling, can make the label more attractive, and can also make the function of the barcode printer better;

2. The test tube labeling machine of the present invention can be matched with various bar code printers, and its practicability is very high. For each bar code printer of different models, only the bar code printer needs to be positioned by the positioning boss and the frame. The clamping device is clamped, and the labeling operation can be carried out;

3. The test tube labeling machine of the present invention adopts a laser anti-loosening device to automatically control the rotary shaft to prevent the loosening of the attached paper and greatly improve the efficiency of labeling;

4. The test tube labeling machine of the present invention adopts a movable secondary roller assembly form, which can label products with different diameters;

5. The test tube labeling machine of the present invention is controlled by a travel switch. When the pressure roller is pressed down, the pressure roller support triggers the travel switch, thereby starting the main roller motor. Under the action of the limit switch, the main roller motor can be started or stopped without pressing the button, and the operation is convenient and efficient;

6. The test tube labeling machine of the present invention adopts a movable press roller assembly form, by making the press roller support plate slide in the chute of the chute plate, the spatial position of the press roller centerline and the test tube centerline is adjusted, Make the centerline of the pressure roller between the centerline of the test tube and the centerline of the main roller, and ensure that there is a certain error between the moment when the pressure roller presses down and the time when the barcode is output from the paper outlet, the normal sticking process of the label will not be affected, and the label will not be affected. Can be accurately attached to the test tube, which makes the operation easier and more convenient;

7. The test tube labeling machine of the present invention has the advantages of simple structure, convenient debugging, low manufacturing cost and easy operation.

Description of drawings

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is the axonometric projection drawing of the test tube labeling machine structure of the present invention;

Fig. 2 is the axonometric projection drawing of the assembly of the test tube labeling machine and the bar code printer according to the present invention;

Fig. 3 is an axonometric projection view of the assembly relationship between the main roller and the auxiliary roller in the test tube labeling machine according to the present invention;

Fig. 4 is an axonometric projection view of the assembly relationship between the clamping device and the barcode printer in the test tube labeling machine according to the present invention;

Fig. 5 is an axonometric projection view of the structure of the laser anti-loosening device in the test tube labeling machine according to the present invention;

Fig. 6 is an axonometric projection view of the structure of the spring return device in the test tube labeling machine according to the present invention;

Fig. 7 is a front view of the asymmetric structure of the main roller and the auxiliary roller in the test tube labeling machine according to the present invention.

In the figure: 1. Travel switch, No. 2.1 pressure roller support plate, No. 3.1 chute plate, 4. Clamping device, 5. Bottom plate, 6. Pressure roller support, No. 7.2 chute plate, 8. Pressure roller, No. 9.2 Pressure roller support plate, 10. Grip roller, 11. Vice roller, 12. Main roller, 13. Rack, 14. Main roller motor, 15. Rotary shaft motor, 16. Rotary shaft, 17. Notch, 18. Laser Anti-loosening device, No. 19.1 rack wall through hole, 20. barcode printer, 21. test tube, No. 22.1 positioning boss, No. 23.1 arc-shaped slot on the rack wall, No. 24.2 positioning boss, 25. auxiliary roller nut, 26 .Location pin, 27. Long bolt rotating rod, 28. Long bolt support plate, 29. Long bolt, 30. Long bolt top plate, 31. Printer spindle, 32. Rack wall No. 1, 33. Beam, 34. Laser, 35. Spring return device support plate, 36. spring return device, 37. laser receiver, 38. supporting paper, No. 39.2 frame wall, 40. short cylinder, 41. bearing pin, 42. spring, 43. cone.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

The test tube labeling machine of the present invention is a supporting device of a barcode printer, and its purpose is to solve the problem that the barcode printer cannot directly label.

A test tube labeling machine is mainly composed of a pressure roller mechanism, a main and auxiliary roller mechanism, a clamping device 4 and a laser anti-loosening device 18; Roller support plate 2, No. 2 pressure roller support plate 9, pressure roller bracket 6, pressure roller 8, grip roller 10, No. 1 chute plate 3, No. 2 chute plate 7, travel switch 1;

The main and auxiliary roller mechanism is made up of main roller 12, auxiliary roller 11, main roller motor 14, rotary shaft 16, rotary shaft motor 15.

Referring to Fig. 1 and Fig. 2, the two chute plates of the pressure roller mechanism, No. 1 chute plate 3 and No. 2 chute plate 7 are symmetrically fixed on the left and right sides of the upper surface of the bottom plate 5; the No. 1 pressure roller supports Plate 2 and No. 2 pressure roller support plate 9 are respectively installed on No. 1 chute plate 3 and No. 2 chute plate 7, and are fixed by bolts; pressure roller 8 and grip roller 10 are installed on No. On the roller supporting plate 2 and No. 2 pressing roller supporting plate 9, the pressing roller 8 rotates together with the test tube 21 during the labeling process; By making the pressure roller support plate slide in the chute of the chute plate, the spatial position of the centerline of the pressure roller 8 is adjusted so that the centerline of the pressure roller 8 is located between the centerline of the test tube 21 and the centerline of the main roller 12, ensuring that When there is a certain error between the time when the roller 8 presses down and the time when the label is output from the paper outlet of the barcode printer 20, the label can be accurately attached to the test tube 21.

Referring to Fig. 2, Fig. 3 and Fig. 5, the frame 13 is composed of the No. 1 frame wall 32, the No. 2 frame wall 39 and the beam 33; the No. 1 frame wall 32 and the No. 2 frame wall 39 are symmetrically fixed on the bottom plate 5. On both sides of the front part, the No. 1 frame wall 32 and the No. 2 frame wall 39 are rectangular plate structural members with the same structure, and the upper left corners of the No. 1 frame wall 32 and the No. 2 frame wall 39 are processed for installation. No. 1 frame wall arc-shaped through groove 23 of secondary roller 11 and No. 2 frame wall arc-shaped through groove, and the right side of No. 1 frame wall arc-shaped through groove 23 and No. 2 frame wall arc-shaped through groove is processed with Install the No. 1 frame wall through hole 19 of the main roller 12 and the No. 2 frame wall through hole, between the No. 1 frame wall arc-shaped through groove 23 of the No. 1 frame wall 32 and the No. 1 frame wall through hole 19 The locating pin through holes for installing locating pins 26 are arranged between them, and locating pins 26 are installed in the locating pin through holes; Connection, No. 1 frame wall 32 and No. 2 frame wall 39 are parallel and symmetrical, No. 1 frame wall through hole 19 and the rotation axis of No. 2 frame wall through hole are collinear, and No. Align the arc-shaped slots on the wall of No. 2 rack.

Referring to Fig. 1, the travel switch 1 is installed next to the No. 1 pressure roller support plate 2 on the left side, so that the contact of the travel switch 1 is in contact with the end of the pressure roller bracket 6, and the travel switch 1 is fixed on the base plate 5 by bolts. When the pressure roller 8 is pressed down, the pressure roller bracket 6 triggers the travel switch 1, thereby starting the main roller motor 14, and drives the main roller 12 to rotate through belt transmission. Under the action of the travel switch 1, there is no need to use buttons to start or stop the main roller motor 14, and the operation is convenient and efficient.

1 and 5, the laser anti-loosening device 18 is made up of a laser 34, a laser receiver 37, a spring return device 36 and a spring return device support plate 35; the clamping device 4 is composed of a long bolt 29, a long bolt rotating rod 27, a top plate 26 and long bolt support plate 28 are made up; Rotary shaft motor 15 and main roller motor 14 are the motors of the same model.

Referring to FIG. 1 and FIG. 5 , the frame 13 is installed on the center line of the bottom plate 5 so that it is symmetrical with respect to the bottom plate 5 . Referring to Fig. 7, the main roller 12 and the auxiliary roller 11 adopt an asymmetric structure (the lengths L1 and L2 on both sides of the shaft core where the outer roller is the middle part are not equal), and the main roller 12 is installed on the No. 1 frame wall of the frame 13 through bearings 32. On the wall 39 of the No. 2 frame, the position is above the beam 33, wherein the auxiliary roller 11 is composed of the shaft core, the outer roller and the outer rubber, and the shaft core of the auxiliary roller 11 is fixed on the frame 13 through the auxiliary roller nut 25 . The auxiliary roller 11 is installed close to the barcode printer 20, the gap L between the main roller 12 and the auxiliary roller 11 (0<L<D, D is the diameter of the test tube), and the main roller 12 is installed relatively far away from the barcode printer 20. The main roller 12 is rotated by the main roller motor 14 through belt transmission. The main roller motor 14 is installed on the beam 33 of the frame 13 . In order to adapt to the situation that the cap head of some products is larger than the diameter of the main body, the main roller 12 and the auxiliary roller 11 adopt an asymmetric structure; using the principle of eccentric cam, the auxiliary roller 11 is placed on the No. 1 frame wall 32 of the frame 13, and the No. 2 machine The arc-shaped channel 23 of the No. 1 frame wall and the arc-shaped channel of the No. 2 frame wall are designed on the frame wall 39, so that the auxiliary roller 11 can move along the arc-shaped channel 23 of the No. 1 frame wall and the arc-shaped channel of the No. 2 frame wall. Shape the movement of the groove, and then adjust the distance between the auxiliary roller 11 and the main roller 12, and at the same time ensure that the upper edge line of the test tube 21 and the paper output position of the paper outlet of the barcode printer 20 are on the same horizontal line, and tighten the auxiliary rollers on both sides The nut 25 realizes the fixation to the auxiliary roller 11, so that the test tubes with different diameters can be labeled.

Referring to Fig. 3, No. 1 positioning boss 22 and No. 2 positioning boss 24 are installed on the frame 13, and one is respectively installed on No. 1 frame wall 32 and No. 2 frame wall 39, and its position is near the barcode printer 20 The paper outlet is fixed on the No. 1 frame wall 32 and the No. 2 frame wall 39 by screws. Referring to FIG. 4 , the clamping device 4 is composed of a long bolt 29 , a long bolt support plate 28 , a long bolt rotating rod 27 and a long bolt top plate 30 . The long bolt support plate 28 is installed on the centerline position of the base plate 5 by bolts and nuts, so that it is left-right symmetrical with respect to the base plate, and near the rear edge of the base plate 5 , the long bolt support plate 28 is perpendicular to the base plate 5 . The long bolt 29 passes through the long bolt support plate 28 and is threadedly connected with the center of the long bolt support plate 28. One end of the long bolt 29 is fixed with the long bolt top plate 30 by threads, and the other end and the long bolt rotating rod 27 are also threaded. fixed. Referring to Fig. 2 and Fig. 3, the bar code printer 20 is placed on the base plate 5, and one side of the paper outlet is pressed against No. 1 positioning boss 22 and No. 2 positioning boss 24 to realize positioning; The bolt rotating rod 27, the long bolt 29 and the long bolt top plate 30 move forward together, so that the long bolt top plate 30 contacts the rear surface of the barcode printer 20, thereby realizing clamping.

Referring to Fig. 1 and Fig. 5, the rotary shaft 16 is installed under the notch 17 through a bearing, and the rotary shaft motor 15 installed on the upper surface of the bottom plate 5 realizes its rotation through belt transmission; the supporting paper 38 is recovered by the rotary shaft 16, Wherein the rotary shaft motor 15 is fixed on the upper surface of the bottom plate 5 by bolts and nuts, and the rotary shaft motor 15 and the rotary shaft 16 are connected through a belt transmission.

Referring to FIG. 5 and FIG. 6 , the laser anti-loosening device 18 is composed of a laser 34 , a spring return device support plate 35 , a spring return device 36 and a laser receiver 37 . Wherein the spring return device 36 is made up of spring 42, short cylinder 40 and pin shaft 41, pin shaft 41 front end is cone 43, pin shaft 41 end and short cylinder 40 are connected by thread, cone 43 and pin shaft 41 are In one piece, the short cylinder 40 and the spring 42 are installed on both sides of the spring return device support plate 35 respectively; the spring 42 is sleeved on the pin shaft 41, the front end of the spring 42 is in contact with the bottom surface of the cone 43, and the end of the spring 42 is supported by the spring return device plate 35 in contact. Laser 34, laser receiver 37 and spring return device support plate 35 are installed on the crossbeam 33 of frame 13 by bolt, and the position of spring return device support plate 35 is between laser 34, laser receiver 37, and spring return device 36 passes through The clearance fit is installed on the support plate 35 of the spring return device, and the spring return device 36 is kept in the reset state by the action of the spring 42 . The supporting paper 38 is recovered by the rotation of the rotary shaft 16. Now the rotation of the rotary shaft 16 may not keep the supporting paper 38 in a tensioned state every moment, which will affect the quality and aesthetics of labeling. When supporting the attached paper 38 tension, the spring 42 of the spring return device 36 is in a compressed state, and the short cylinder 40 of the spring return device 36 will block the laser light emitted by the laser device 34, so that the laser receiver 37 cannot receive the laser light. The signal is transmitted to the rotary shaft motor 15 to keep the speed constant at this moment; when the supporting paper 38 is loose, the spring return device 36 resets, the short cylinder 40 of the spring return device 36 moves backward, and the laser 34 emits The laser light is received by the laser receiver 37, and this signal is transmitted to the rotary shaft motor 15 to increase its rotational speed, so that the supporting paper 38 enters a tensioned state.

Referring to FIG. 2 , the barcode printer 20 is placed on the upper surface of the bottom plate 5 , positioned by the bottom plate 5 and the positioning boss, and clamped by the clamping device 4 . The test tube 21 is placed between the main roller 12 and the auxiliary roller 11, and is axially positioned by a positioning pin 26. When the barcode printer 20 prints a label, the rotary shaft motor 15 drives the rotary shaft 16 to rotate, so that the supporting paper 38 is tensioned. Press down the pressure roller 8, the pressure roller bracket 6 triggers the limit switch 1, the main roller motor 14 is started, and the main roller 12 is rotated through the belt transmission, and the test tube 21 is rotated under the joint action of the main roller 12, the auxiliary roller 11 and the pressure roller 8 , to achieve labeling. After the label is pasted, pull up the holding roller 10, the travel switch 1 resets, and the main roller motor 14 stops rotating. Like this, the whole process of labeling has been completed.

In the labeling process, if there is a slack state in the supporting paper 38, the spring reset device 36 resets, and the short cylinder 40 of the reset device 30 moves backward, and the laser light emitted by the laser device 34 is received by the laser receiver 37, and this signal is passed to The rotary shaft motor 15 makes it increase the rotating speed, so that the supporting paper 38 enters a tensioned state, so that normal labeling can be realized.

Claims (9)

1. A test tube labeling machine, mainly composed of a pressure roller mechanism, a main and auxiliary roller mechanism, a left and right symmetrical clamping device (4) installed at the center of the rear of the bottom plate (5) and a fixed frame (13). Composed of a laser anti-loosening device (18), characterized in that: The pressure roller mechanism is symmetrically installed on both sides of the middle part of the bottom plate (5), and the pressure roller mechanism is mainly composed of the pressure roller brackets ( 6), the pressure roller (8) and the grip roller (10) installed on the pressure roller bracket (6) through bearings are respectively slidingly connected with the No. 1 pressure roller support plate (2) and the No. 2 pressure roller support plate (9) The No. 1 chute plate (3), the No. 2 chute plate (7) and the travel switch (1) fixed on the bottom plate (5) and in contact with the end of the pressure roller bracket (6); The main and auxiliary roller mechanism is mainly composed of the main roller (12), auxiliary roller (11) and main roller motor (14) installed on the front of the bottom plate (5) through the frame (13), and installed on the bottom plate (5) through bearings. The rotary shaft (16) below is composed of a rotary shaft motor (15) connected with the rotary shaft (16) through belt transmission. 2. A test tube labeling machine according to claim 1, characterized in that: Described rack (13) is made up of No. 1 rack wall (32), No. 2 rack wall (39) and beam (33); No. 1 rack wall (32), No. 2 rack wall (39) It is symmetrically fixed on both sides of the front part of the bottom plate (5), and the upper left corners of the No. 1 rack wall (32) and the No. The arc-shaped channel on the wall of No. 2 frame, the arc-shaped channel on the wall of No. 1 frame (23) and the right side of the arc-shaped channel on the wall of No. 2 frame are respectively provided with the wall of No. 1 frame for installing the main roller (12). The through hole (19) and the No. 2 rack wall through hole are provided with positioning pins (26) between the No. 1 rack wall arc-shaped slot (23) and the No. 1 rack wall through hole (19); the beam ( The two ends of 33) are fixedly connected with the middle part of No. 1 rack wall (32) and No. 2 rack wall (39) insides. 3. A test tube labeling machine according to claim 1, characterized in that: The travel switch (1) is set on the side of No. 1 pressure roller support plate (2); the No. 1 chute plate (3) and No. 2 chute plate (7) are symmetrically fixed on the upper surface of the bottom plate (5) left and right sides. 4. A test tube labeling machine according to claim 1, characterized in that: The main roller (12) is rotated by the main roller motor (14) installed on the crossbeam (33) through a belt drive; the main roller (12) and the auxiliary roller (11) both have unequal The asymmetric structure of the bottom plate (5) is provided with a notch (17) in the middle of the front part, and the rotary shaft (16) is located below the notch (17); the rotary shaft motor (15) is fixed on the upper surface of the bottom plate (5), The rotary shaft (16) rotates and recovers the supporting paper (38). 5. A test tube labeling machine according to claim 1, characterized in that: The clamping device (4) is composed of a long bolt rotating rod (27), a long bolt support plate (28), a long bolt (29) and a long bolt top plate (30); The long bolt support plate (28) is symmetrically fixed on the central part of the rear portion of the base plate (5); the long bolt (29) passes through the long bolt support plate (28) and is threadedly connected with the long bolt support plate (28), and the long bolt (29) One end is fixedly connected with the long bolt top plate (30), and the other end is fixedly connected with the long bolt rotating rod (27). 6. A test tube labeling machine according to claim 1, characterized in that: The laser anti-loosening device (18) is composed of a laser (34), a spring return device support plate (35), a spring return device (36) and a laser receiver (37); The spring return device (36) is composed of a spring (42), a pin shaft (41) and a short cylinder (40), the front end of the pin shaft (41) is a cone (43), and the end of the pin shaft (41) is a short cylinder Body (40), cone (43) and bearing pin (41) are one, and short cylinder (40) and bearing pin (41) are fixedly connected, and short cylinder (40) and spring (42) are respectively installed on spring return Both sides of the device support plate (35); the spring (42) is sleeved on the pin shaft (41), the front end of the spring (42) is in contact with the bottom surface of the cone (43), and the end of the spring (42) is in contact with the spring reset device support plate (35 )touch; The laser (34), the spring return device support plate (35), and the laser receiver (37) are sequentially fixed on the beam (33) of the frame (13), and the spring return device (36) is installed on the support of the spring return device through clearance fit. plate (35). 7. A test tube labeling machine according to claim 2, characterized in that: No. 1 positioning boss (22) and No. 2 positioning boss (24) are respectively fixed on the upper left sides of No. 1 rack wall (32) and No. 2 rack wall (39). 8. A test tube labeling machine according to claim 1, characterized in that: The gap between the main roller (12) and the auxiliary roller (11) is smaller than the diameter of the test tube (21); adjust the distance between the auxiliary roller (11) and the main roller (12), so that the upper edge line of the test tube (21) and The paper output positions of the paper output ports of the barcode printer (20) are on the same horizontal line. 9. A test tube labeling machine according to claim 1, characterized in that: The pressure roller (8) rotates together with the test tube (21) during the labeling process; the grip roller (10) controls the pressure roller (8) to press down on the test tube (21); adjust the centerline of the pressure roller (8) The space position, make the centerline of pressure roller (8) be between test tube (21) centerline and main roller (12) centerline.

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