CN203976039U - A kind of film covering device of sofa tooth bar - Google Patents

Abstract

The utility model provides a kind of film covering device of sofa tooth bar, belongs to field of mechanical technique.It has solved in prior art does not have film covering device in cutting machine, need manually plastic tape to be wrapped on sofa tooth bar labour intensity high-technology problem.The film covering device of this sofa tooth bar, this device comprises a frame, it also comprises load-transfer device, diaphragm delivery wheel, storage film part and film-covered member, load-transfer device is positioned in frame and load-transfer device and can drive its transmission device moving to be connected, diaphragm delivery wheel is close to conveyer belt discharging end place, storage film part is used for storing diaphragm, and diaphragm can be overlapped on diaphragm delivery wheel, film-covered member at conveyer belt discharging direction place and diaphragm delivery wheel between load-transfer device and film-covered member, the diaphragm that film-covered member can be carried diaphragm delivery wheel place be coated on two edges of sofa tooth bar.The utlity model has the advantage that overlay film effect is high, labour intensity is low.

Description

A coating device for a sofa rack

technical field

The utility model belongs to the technical field of machinery, and relates to a coating device, in particular to a coating device for sofa racks.

Background technique

The production method of the existing sofa rack is generally to put the iron sheet into the punch press to punch out the sofa rack with conical teeth, and rely on manual cutting of the corresponding length of the diaphragm to cover the two sides of the sofa rack, thereby completing the sofa rack. Strip production and processing.

After searching, for example, Chinese patent literature discloses a cutting machine for plastic belts for sofa rack packaging [patent number: ZL201310496297.0; authorized announcement number: CN103522322A]. The cutting machine for the plastic belt used for sofa rack packaging, the cutting machine includes a frame, the frame is fixed with a cutting table along the horizontal direction, it is characterized in that a traction device is fixed on the cutting table, The traction device includes a first side plate and a second side plate arranged vertically, the lower end of the first side plate and the lower end of the second side plate are fixed on the cutting table, the first The side plate and the second side plate are fixedly connected by several cross bars, and the first side plate and the second side plate are respectively slidably connected with slider one and slider two capable of moving in the vertical direction.

Although the cutting machine for plastic strips for sofa rack packaging disclosed in this patent can cut plastic strips of different thicknesses and has good versatility, it still has many shortcomings. There is no film covering device in this cutting machine, and the plastic strips need to be cut manually. Wrapping it on the sofa rack is labor-intensive, so it is necessary to design a coating device for the sofa rack.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and propose a coating device for sofa racks, which has the characteristics of high coating effect and low labor intensity.

The purpose of this utility model can be achieved through the following technical solutions: a film coating device for sofa racks, which includes a frame, and is characterized in that it also includes a conveyor belt, a diaphragm conveying wheel, a film storage part and a film coating device. Membrane, the above-mentioned conveyor belt is located on the frame and the conveyor belt is connected with the transmission mechanism that can drive it to move, the above-mentioned diaphragm conveying wheel is close to the discharge end of the conveyor belt, the above-mentioned film storage part is used to store the diaphragm, and The diaphragm can be lapped on the above-mentioned diaphragm conveying wheel, the above-mentioned film covering part is located at the discharge direction of the conveyor belt and the above-mentioned film conveying wheel is located between the conveyor belt and the film covering part, and the above-mentioned film covering part can Wrap the film conveyed by the film conveying wheel on the two edges of the sofa rack.

The working principle of the film covering device of the sofa rack is as follows. The operator puts a roll of film on the film storage part, fixes one end of the film on the film conveying wheel, and drives the conveyor belt to rotate together through the transmission mechanism. With the rotation of the conveyor belt, the sofa rack can be transported to the film covering part, and the diaphragm can be transported to the film covering part by controlling the rotation of the diaphragm conveying wheel, and the film can be wrapped on the sofa rack by the film covering part superior.

The transmission mechanism includes a motor, a driving wheel and a driven wheel, the above-mentioned motor is fixedly connected on the frame, the above-mentioned driving wheel and the driven wheel are connected on the frame and can rotate, the above-mentioned driving wheel is fixed to the rotating shaft of the motor Even, the above-mentioned conveyer belt is annular and is enclosed within on the driving wheel and the driven wheel.

When the sofa rack needs to be transported, the rotating shaft of the control motor drives the driving wheel to rotate together, and the driving wheel drives the driven wheel to rotate together through the conveyor belt. With the rotation of the conveyor belt, the sofa rack can be transported to the film-coated part.

The film covering part includes a bracket fixedly connected to the frame, and the bracket has a guide rail, and the bracket is located on both sides of the sofa rack to be transported. There are forming wheels: a left forming wheel and a right forming wheel. The side of the left forming wheel has a coating part 1, the side of the right forming wheel has a coating part 2 and the coating part 1 is opposite to the coating part 2, and the frame has a coating driving part , the frame is also connected with a driving gear, and the film-covering driving member is connected with the driving gear, and the frame also has a transmission gear set one and a transmission gear set two, and the transmission gear set one and the transmission gear set The input end of the gear set two is connected with the driving gear, the output end of the transmission gear set one is connected with the left forming wheel, the output end of the transmission gear set two is connected with the right forming wheel, and the above-mentioned driving gear rotates In the process, the transmission gear set one and the transmission gear set two can make the left forming wheel and the right forming wheel move to the conveyed sofa rack or simultaneously move away from the sofa rack.

When it is necessary to cover the diaphragm on the sofa rack, the drive gear is driven to rotate together by the film-coated driving part, the drive gear drives the transmission gear set to rotate together, the drive gear set drives the left forming wheel to rotate together, and at the same time, the drive gear Drive the transmission gear set two to rotate together, and the transmission gear set two drives the right forming wheel to rotate together. With the left forming wheel and the right forming wheel rotating together, the diaphragm can be coated on the sofa rack.

The first coating part is an annular groove recessed into the edge of the left forming wheel, the cross section of the first coating part is V-shaped, and the second coating part is recessed into the right forming wheel in a ring shape. The annular groove at the edge, the cross-section of the coating part 2 is V-shaped.

The film covering part one is an annular groove and the film covering part is an annular groove two. With this structure, the diaphragm can be guided to wrap the diaphragm on the sofa rack to ensure the quality of the film covering.

Described transmission gear set one comprises left gear one, reversing wheel one and left gear two, and above-mentioned left gear one, reversing wheel one and left gear two are all connected on the support and can rotate, and left gear one is connected with driving gear Mesh, and reversing wheel 1 meshes with left gear 1 and left gear 2 respectively.

The drive gear drives the left gear one to rotate together, the left gear one drives the reversing wheel one to rotate together, and the reversing wheel one drives the left gear two to rotate together. With this structure, the left gear one and the left gear two can be synchronized and rotate in the same direction .

Described transmission gear set two comprises right gear one, reversing wheel two, right gear two and reversing wheel three, and above-mentioned right gear one, reversing wheel two, right gear two and reversing wheel three are all connected on the support and Can rotate, reversing wheel two is meshed with drive gear, and right gear one is meshed with reversing wheel two, and reversing wheel three is meshed with right gear one, and right gear two is meshed with reversing wheel three.

The drive gear drives the reversing wheel 2 to rotate together, the reversing wheel 2 drives the right gear 1 to rotate together, the right gear 1 drives the reversing wheel 3 to rotate together, and the reversing wheel 3 drives the right gear 2 to rotate together. With this structure, the The right gear one and the right gear two are synchronous and rotate in the same direction.

The number of the left forming wheels is two and the two left forming wheels move synchronously along the guide rail; the number of the right forming wheels is two and the two right forming wheels move synchronously along the guide rail.

Through the synchronous movement of the two left forming wheels and the two right forming wheels, it can ensure the stable and reliable coating operation of the sofa rack.

The two left forming wheels and the two right forming wheel brackets have a knife rest, and the knife rest is provided with a cutter cylinder, and a blade for cutting the diaphragm is fixedly connected to the piston rod of the cutter cylinder.

When the diaphragm needs to be cut off, the piston rod of the control cylinder moves downward, and the piston rod of the cutter cylinder drives the blade to move downward. As the blade moves downward gradually, the diaphragm can be cut off.

The transmission gear set 2 is also fixedly connected with the transmission wheel 1, and the transmission shaft is fixedly connected with the transmission shaft along the vertical direction on the described frame, and the transmission wheel 2 is fixedly connected with the lower end of the transmission shaft. The above-mentioned transmission wheel 1 It is connected with the transmission wheel 2 through a chain. The upper end of the transmission shaft is fixedly connected with a driving bevel gear. Both sides of the diaphragm conveying wheel have protruding connecting parts. The above two connecting parts are respectively connected to the two sides of the frame. On the side, the connecting portion of the protruding frame is fixedly connected with a driven bevel gear and the driven bevel gear meshes with the above-mentioned driving bevel gear.

When the diaphragm needs to be transported, the driving part of the coating drives the transmission wheel 1 to rotate together through the transmission gear set 2, and the transmission wheel 1 drives the transmission wheel 2 to rotate together through the chain, and the transmission wheel 2 drives the transmission shaft to rotate together, and the transmission shaft drives the active bevel gear Rotate together, the driving bevel gear drives the driven bevel gear to rotate together, and the driven bevel gear drives the diaphragm conveying wheel to rotate together.

The frame is also provided with a connecting rod, one end of the connecting rod is hinged on the frame, and the other end of the connecting rod has a rotatable pinch wheel, and the above pinch wheel can lean against under the action of gravity. At the discharge of the conveyor belt.

When the sofa rack needs to be transported, the sofa rack is guided by the pressing wheel, so that the sofa rack can smoothly enter between the first and second coating parts to ensure the normal operation of the sofa rack coating.

The pressing wheel is in the shape of a disk, and the circumferential edge of the pressing wheel has an annular recessed tooth avoidance groove.

The pressing wheel is in the shape of a disc and has tooth grooves. With this structure, the pressing wheel can rotate together with the conveyer belt, and the teeth of the sofa rack can be prevented from being damaged, and the structure is reasonable.

Compared with the prior art, the coating device of the sofa rack has the following advantages:

1. The utility model uses the diaphragm conveying wheel to transport the diaphragm between the left forming wheel and the right forming wheel, and wraps the diaphragm on the sofa rack through the left forming wheel and the right forming wheel, so that the film covering operation can be realized Continuous production, instead of manual operation, high film lamination efficiency and low labor intensity.

2. The piston rod of the cutter cylinder drives the blade to move downwards, which can cut off the diaphragm to ensure the precise size of the diaphragm and high production efficiency.

3. The film coating part 1 is an annular groove and the film coating part is an annular groove 2. This structure can guide the diaphragm so that the diaphragm covers the sofa rack, and the pass rate is high.

4. The sofa rack is guided by the pressing wheel, so that the sofa rack can smoothly enter between the first film covering part and the second film covering part, and the film covering device has good working stability.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of the coating device of the sofa rack.

Fig. 2 is a three-dimensional structure schematic diagram of the coating device of the sofa rack with some parts removed.

Fig. 3 is a schematic plan view of the film covering device of the sofa rack with some parts removed.

Fig. 4 is a three-dimensional structural schematic diagram of the sofa rack.

In the figure, 1. Rack; 2. Film storage part; 3. Driving wheel; 4. Diaphragm conveying wheel; 5. Chain; 1. Laminating part 1; 9. Blade; 10. Cutter cylinder; 11. Knife rest; 12. Right forming wheel; 12a. Laminating part 2; 13. Pressing wheel; 15, conveyor belt; 16, driven wheel; 17, left gear two; 18, rotating shaft two; 19, reversing wheel one; 20, left gear one; 21, rotating shaft one; 22, driving gear; 23, reversing wheel Two; 24, rotating shaft three; 25, right gear one; 26, reversing wheel three; 27, rotating shaft four; 28, right gear two; 29, transmission wheel two; 30, transmission shaft; 31, driving bevel gear; 32, Driven bevel gear; 33, diaphragm; 34, sofa rack.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Fig. 1 and Fig. 4, the coating device of the sofa rack includes a frame 1, which also includes a conveyor belt 15, a diaphragm conveying wheel 4, a film storage part 2 and a film coating part, and the conveyor belt 15 is located on the frame 1 and the conveyor belt 15 is connected with the transmission mechanism that can drive it to move. The diaphragm conveying wheel 4 is close to the discharge end of the conveyor belt 15. The surface of the diaphragm conveying wheel 4 is a knurled structure, which can prevent the membrane The sheet 33 slips; the film storage part 2 is used to store the film 33, and the film 33 can be overlapped on the film delivery wheel 4, the film covering part is located at the discharge direction of the conveyor belt 15 and the film delivery wheel 4 is located on the conveyor belt Between 15 and the film-covering part, the film-covering part can wrap the film 33 conveyed by the film delivery wheel 4 at the two edges of the sofa rack 34.

As shown in Figure 1, the transmission mechanism includes a motor, a driving wheel 3 and a driven wheel 16, the motor is fixedly connected on the frame 1, and the motor is fixedly connected on the frame 1 by means of bolt connection; the driving wheel 3 and the driven wheel 16 are all Connected on the frame 1 and capable of rotation, the driving wheel 3 is fixedly connected with the rotating shaft of the motor, and the driving wheel 3 is fixedly connected with the rotating shaft of the motor through a coupling; the conveyor belt 15 is annular and is sleeved on the driving wheel 3 and the driven wheel 16 .

As shown in Figure 1 and Figure 2, the film-covered part includes a bracket fixed on the frame 1, and the bracket is fixed on the frame 1 by bolt connection; there is a guide rail on the bracket, and the guide rail is fixed by bolt connection On the support; the both sides of the sofa rack 34 being transported on the support have forming wheels: left forming wheel 8 and right forming wheel 12, the side of the left forming wheel 8 has a coating part-8a, the right forming wheel 12 The side part has the second coating part 12a and the first coating part 8a is opposite to the second coating part 12a. There is a coating driving part 6 on the frame 1, and the coating driving part 6 is fixedly connected to the frame 1 by means of bolt connection. On, in this embodiment, the film driving part 6 adopts a stepping motor available on the market; the frame 1 is also connected with a driving gear 22, and the film driving part 6 is connected with the driving gear 22, and the driving gear 22 It is fixed on the film-covering driving member 6 by means of a key connection; a transmission gear set one and a transmission gear set two are also arranged in the frame 1, and the input ends of the transmission gear set one and the transmission gear set two are all connected with the drive gear 22, The output end of the transmission gear set one is connected with the left forming wheel 8, and the output end of the transmission gear set two is connected with the right forming wheel 12. During the rotation of the driving gear 22, the transmission gear set one and the transmission gear set two can make the left Forming wheel 8 and right forming wheel 12 move to the sofa rack 34 that is conveyed simultaneously or move away from sofa rack 34 simultaneously, along with left forming wheel 8 and right forming wheel 12 rotating together, diaphragm 33 can be wrapped Cover on the sofa rack 34.

As shown in Figure 1, the coating part 1 8a is an annular groove recessed into the edge of the left forming wheel 8 in an annular shape, the cross section of the coating part 8a is V-shaped, and the coating part 2 12a is annularly recessed The annular groove at the edge of the molding wheel 12, the cross-section of the film covering part 12a is V-shaped, adopts this structure, can play a guiding role to the diaphragm 33, so that the diaphragm 33 is wrapped on the sofa rack 34, ensuring the covering film quality.

As shown in Fig. 1 and Fig. 2, transmission gear set one includes left gear one 20, reversing wheel one 19 and left gear two 17, and left gear one 20, reversing wheel one 19 and left gear two 17 are all connected on the bracket And can rotate, and left gear one 20 is fixed on the support by rotating shaft one 21, and reversing wheel one 19 is fixed on the support by the first rotating shaft, and left gear two 17 is fixed on the support by rotating shaft two 18; The gears 22 are meshed, and the reversing wheel one 19 is meshed with the left gear one 20 and the left gear two 17 respectively.

As shown in Fig. 1 and Fig. 2, transmission gear set two comprises right gear one 25, reversing wheel two 23, right gear two 28 and reversing wheel three 26, right gear one 25, reversing wheel two 23, right gear two 28 and reversing wheel three 26 are all connected on the support and can rotate, and reversing wheel two 23 are fixed on the support by the second rotating shaft, and right gear one 25 is fixed on the support by rotating shaft three 24, and reversing wheel three 26 passes through the second rotating shaft. Three rotating shafts are fixed on the support, and right gear two 28 are fixed on the support by rotating shaft four 27; Mesh with right gear one 25, and right gear two 28 are meshed with reversing wheel three 26.

As shown in Figures 1 and 2, the number of left forming wheels 8 is two and the two left forming wheels 8 move synchronously along the guide rails. The left forming wheel 8 at the material end is fixed on the upper end of the rotating shaft 2 18. With this structure, the left gear 1 20 and the left gear 2 17 can be synchronized and rotate in the same direction; the number of the right forming wheels 12 is two and two right The forming wheel 12 moves synchronously along the guide rail, the right forming wheel 12 near the discharge end is fixed on the upper end of the rotating shaft 3 24, and the right forming wheel 12 far away from the discharging end is fixed on the upper end of the rotating shaft 4 27. With this structure, the Right gear one 25 and right gear two 28 are synchronized and rotate in the same direction.

As shown in Figure 1, two left forming wheels 8 and two right forming wheels 12 supports have a knife rest 11, and the knife rest 11 is fixedly connected on the frame 1 by means of bolt connection; the knife rest 11 has a cutter cylinder 10 , the cutter cylinder 10 is fixedly connected to the knife rest 11 by means of bolt connection; the blade 9 for cutting the diaphragm 33 is fixedly connected to the piston rod of the cutter cylinder 10, and the blade 9 is fixedly connected to the cutter by means of bolt connection. The end of the piston rod of the cylinder 10.

As shown in Fig. 1 and Fig. 3, the transmission gear set 2 is also fixedly connected with a transmission wheel 1 7, and the transmission wheel 1 7 is fixed on the rotating shaft 3 24 by a key connection; Be connected with transmission shaft 30, the lower end of transmission shaft 30 is fixedly connected with transmission wheel two 29, and transmission wheel two 29 is fixed on the lower end of transmission shaft 30 by the mode of key connection; Transmission wheel one 7 is connected with transmission wheel two 29 by chain 5 The upper end of the transmission shaft 30 is fixedly connected with the driving bevel gear 31, and the driving bevel gear 31 is fixed on the upper end of the transmission shaft 30 through a key connection; both sides of the diaphragm conveying wheel 4 have protruding connecting parts, and the two connecting parts are respectively Connected to both sides of the frame 1 , a driven bevel gear 32 is fixedly connected to the connecting portion protruding from the frame 1 , and the driven bevel gear 32 meshes with the driving bevel gear 31 .

As shown in Figure 1, a connecting rod 14 is also provided on the frame 1, and one end of the connecting rod 14 is hinged on the frame 1, and the other end of the connecting rod 14 has a rotatable pinch wheel 13, and the pinch wheel 13 is on the Under the action of gravity, it can lean against the discharge place of the conveyor belt 15, and adopt this structure, which can play a guiding role for the sofa rack 34.

As shown in Figure 1, the pressing wheel 13 is disc-shaped, and the circumferential edge of the pressing wheel 13 has an annular recessed tooth avoidance groove 13a, so that the pressing wheel 13 can rotate together with the conveyor belt 15, and The teeth of the sofa rack 34 can be prevented from being damaged, and the structure is reasonable.

The working principle of the laminating device of the sofa rack is as follows. The operator puts a roll of film 33 on the film storage part 2, fixes the film 33 on the film conveying wheel 4 and one end of the film 33 is in the left-hand position. Between the wheel 8 and the right forming wheel 12, the rotating shaft of the control motor drives the driving wheel 3 to rotate together, and the driving wheel 3 drives the driven wheel 16 to rotate together through the conveyor belt 15. With the rotation of the conveyor belt 15 and the pressing wheel 13, the sofa gear The guiding of bar 34, sofa rack 34 is delivered between left forming wheel 8 and right forming wheel 12; One 20 drives reversing wheel one 19 to rotate together, and reversing wheel one 19 drives left gear two 17 to rotate together, and simultaneously, driving gear 22 drives reversing wheel two 23 to rotate together, and reversing wheel two 23 drives right gear one 25 to rotate together , right gear one 25 drives reversing wheel three 26 to rotate together, and reversing wheel three 26 drives right gear two 28 to rotate together, rotating shaft one 21, rotating shaft two 18, rotating shaft three 24 and rotating shaft four 27 can synchronously, rotate in the same direction, thereby Realize two left forming wheels 8 and two right forming wheels 12 to rotate together; Simultaneously, driving gear 22 drives reversing wheel 2 23 to rotate together, and reversing wheel 2 23 drives right gear 1 25 to rotate together, and right gear 1 25 drives rotating shaft Three 24 rotate together, rotating shaft three 24 drive transmission wheel one 7 to rotate together, transmission wheel one 7 drives transmission wheel two 29 to rotate together by chain 5, transmission wheel two 29 drives transmission shaft 30 to rotate together, transmission shaft 30 drives active bevel gear 31 Rotate together, the driving bevel gear 31 drives the driven bevel gear 32 to rotate together, the driven bevel gear 32 drives the diaphragm conveying wheel 4 to rotate together, as the left forming wheel 8 and the right forming wheel 12 rotate together, the diaphragm 33 is coated On the sofa rack 34; control the piston rod of the cutter cylinder 10 to move downward, the piston rod of the cutter cylinder 10 drives the blade 9 to move downward, and as the blade 9 gradually moves downward, the diaphragm 33 can be cut off. Finish the laminating operation of single sofa rack 34.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (10)

1. A coating device for a sofa rack, which comprises a frame (1), is characterized in that it also includes a conveyor belt (15), a diaphragm delivery wheel (4), a film storage part (2) and Film-coated parts, the above-mentioned conveyor belt (15) is located on the frame (1) and the conveyor belt (15) is connected with a transmission mechanism that can drive it to move, and the above-mentioned film conveying wheel (4) is close to the conveyor belt (15) At the discharge end, the above-mentioned film storage member (2) is used to store the diaphragm (33), and the diaphragm (33) can be overlapped on the above-mentioned diaphragm conveying wheel (4), and the above-mentioned film covering member is located on the conveyor belt (15) at the discharge direction and the above-mentioned film conveying wheel (4) is located between the conveyor belt (15) and the film covering part, and the film covering part can transport the film at the film conveying wheel (4) (33) is coated on the two edge places of sofa rack (34). 2. the coating device of sofa rack according to claim 1, is characterized in that, described transmission mechanism comprises motor, driving wheel (3) and driven wheel (16), and above-mentioned motor is fixedly connected on frame ( 1), above-mentioned driving wheel (3) and driven wheel (16) are all connected on the frame (1) and can rotate, and above-mentioned driving wheel (3) is fixedly connected with the rotating shaft of motor, and above-mentioned conveyor belt (15 ) is annular and is sleeved on the driving wheel (3) and the driven wheel (16). 3. The coating device of sofa rack according to claim 1, characterized in that, said coating member comprises a support fixedly connected to the frame (1), said support has guide rails, said support There are forming wheels on both sides of the sofa rack (34) being conveyed: left forming wheel (8) and right forming wheel (12), and the side of the left forming wheel (8) has a film-coated part one (8a ), the side of the right forming wheel (12) has a coating part two (12a) and a coating part one (8a) is facing the coating part two (12a), and the frame (1) has The film driving part (6), also connected with the drive gear (22) on the described frame (1), the described film driving part (6) is connected with the drive gear (22), and the frame (1 ) also has a transmission gear set one and a transmission gear set two, the input ends of the transmission gear set one and the transmission gear set two are all connected with the drive gear (22), and the output end of the transmission gear set one is formed with the left The wheels (8) are connected, the output end of the transmission gear set two is connected with the right forming wheel (12), and the left forming wheel can be formed by the transmission gear set one and the transmission gear set two during the rotation of the above-mentioned drive gear (22). Wheel (8) and right shaping wheel (12) move to the sofa rack (34) place that is conveyed simultaneously or move away from sofa rack (34) place simultaneously. 4. The coating device for sofa rack according to claim 3, characterized in that, said coating part one (8a) is an annular groove recessed into the edge of the left forming wheel (8) in an annular shape, so that The cross-section of the coating part one (8a) is V-shaped, and the coating part two (12a) is an annular groove recessed into the edge of the right forming wheel (12) in a ring shape, and the coating part two ( 12a) has a V-shaped cross-section. 5. The coating device of sofa rack according to claim 3, characterized in that, said transmission gear set one comprises left gear one (20), reversing wheel one (19) and left gear two (17), Above-mentioned left gear one (20), reversing wheel one (19) and left gear two (17) are all connected on the support and can rotate, and left gear one (20) is meshed with drive gear (22), and reversing Wheel one (19) is meshed with left gear one (20) and left gear two (17) respectively; said transmission gear set two includes right gear one (25), reversing wheel two (23), right gear two (28) ) and reversing wheel three (26), above-mentioned right gear one (25), reversing wheel two (23), right gear two (28) and reversing wheel three (26) are all connected on the support and can rotate, The reversing wheel two (23) is meshed with the drive gear (22), the right gear one (25) is meshed with the reversing wheel two (23), the reversing wheel three (26) is meshed with the right gear one (25), Right gear two (28) is meshed with reversing wheel three (26). 6. The coating device of sofa rack according to claim 3, characterized in that, the number of the left forming wheels (8) is two and the two left forming wheels (8) move synchronously along the guide rail, the There are two right forming wheels (12) and the two right forming wheels (12) move synchronously along the guide rail. 7. the coating device of sofa rack according to claim 6, is characterized in that, described two left forming wheels (8) and two right forming wheels (12) supports have a knife rest (11), described There is a cutter cylinder (10) at the knife rest (11), and a blade (9) for cutting the diaphragm (33) is fixedly connected with the piston rod of the cutter cylinder (10). 8. The coating device for sofa racks according to claim 5, characterized in that, said transmission gear set two is also fixedly connected with a transmission wheel one (7), and the upper edge of said frame (1) is vertically Direction axis is fixedly connected with transmission shaft (30), and the lower end of described transmission shaft (30) is fixedly connected with transmission wheel two (29), and above-mentioned transmission wheel one (7) and transmission wheel two (29) pass chain (5 ), the upper end of the transmission shaft (30) is fixedly connected with a driving bevel gear (31), the two sides of the diaphragm conveying wheel (4) have protruding connecting parts, and the above two connecting parts are respectively connected to On both sides of the frame (1), a driven bevel gear (32) is fixedly connected to the connecting portion of the stretched out frame (1) and the driven bevel gear (32) is in phase with the above-mentioned driving bevel gear (31). engage. 9. The coating device of sofa rack according to claim 1, characterized in that, the frame (1) is also provided with a connecting rod (14), and one end of the connecting rod (14) is hinged on On the frame (1), the other end of the connecting rod (14) has a rotatable pinch wheel (13), and the pinch wheel (13) can lean against the outlet of the conveyor belt (15) under the action of gravity. materials department. 10. The coating device of sofa rack according to claim 9, characterized in that, the pressing wheel (13) is disc-shaped, and the peripheral edge of the pressing wheel (13) has an annular concave shape. into the tooth avoidance groove (13a).