TWI850058B - Pipe feeding device and control method thereof - Google Patents

Abstract

A pipe feeding device and a control method thereof, the pipe feeding device comprises a base unit, a carrying unit, a stopping unit and a control unit. The base unit comprises a base and a plurality of substrates, each substrate defining a slot, each slot having a guide section and a feed section intersecting and connected to the guide section. The stopping unit comprises a plurality of stopping modules respectively arranged on the substrates, each stopping module having a first driving member and a stopping member. The control unit signal is connected to the first driving members and can control the first driving members to drive the stoppers to move according to a size information, so that they define multiple placement areas with the multiple placement surfaces of the substrates respectively, to prevent more than one tube from entering the feeding sections and causing abnormal bending, so as to achieve the effect of reducing the error rate of the loading operation.

Description

Pipe feeding device and control method thereof

The present invention relates to a feeding device, in particular to a pipe feeding device and a control method thereof.

An existing pipe loading device cooperates with a pipe bending device to perform pipe bending operations. The existing pipe loading device includes a base unit and a carrying unit for carrying a plurality of pipes. The base unit defines a plurality of slots for the pipes to enter. The carrying unit includes a carrying rack, a reeling rod rotatably arranged on the base unit, and a plurality of carrying belts arranged between the carrying rack and the reeling rod and used to carry the pipes. The reeling rod is driven to rotate and reel the carrying belt, so that the pipes enter the slots and wait for the pipe bending operation.

However, the pipes are usually flexible, so when the pipes are lifted by the carrying belt and the feeding operation is performed, at least two of the pipes often overlap and enter the slots together, causing the at least two of the pipes to be abnormally bent together, and the error rate of the feeding operation will increase accordingly. Obviously, the existing pipe feeding device still has room for improvement.

Therefore, the purpose of the present invention is to provide a pipe feeding device and a control method thereof that can overcome the above-mentioned shortcomings.

Therefore, the pipe loading device of the present invention is suitable for loading a plurality of pipes, and the pipe loading device comprises a base unit, a carrying unit, a blocking unit and a control unit. The base unit comprises a base, and a plurality of substrates arranged on the base at intervals along a left-right direction, each substrate defines a slot for the pipes to enter, each slot has a guide section extending along a guide direction, and an inlet section extending along a vertical direction intersecting the guide direction and connected to the guide section, and each substrate has a placement surface located below each of the guide sections. The carrying unit includes a carrying rack, a reeling rod rotatably disposed on the base unit, and a plurality of carrying belts disposed between the carrying rack and the reeling rod and used for carrying the pipes. Each carrying belt has a fixed end fixedly connected to the carrying rack, and a reeling end opposite to the fixed end and fixedly connected to the reeling rod. The reeling rod is used to rotate and reel up the carrying belts to drive the pipes to approach the slots. The blocking unit includes a plurality of blocking modules respectively arranged on the substrates, each of which has a first driving member and a blocking member whose position corresponds to the respective material guide section and is driven by the first driving member to move along the material guide direction. The control unit is signal-connected to the first driving members and stores size information corresponding to the pipes. The control unit can control the first driving members according to the size information to drive the blocking members to move along the material guide direction respectively, so as to define a plurality of placement areas for one of the pipes to stop with the placement surfaces respectively.

Therefore, the control method of the pipe feeding device of the present invention is applicable to a pipe feeding device for feeding a plurality of pipes. The pipe feeding device comprises a base unit, a carrying unit, a blocking unit and a control unit. The base unit comprises a plurality of substrates arranged at intervals along a left-right direction. Each substrate defines a slot for the pipes to enter. Each slot has a slot extending along a material guiding direction. The tube feeding device comprises a material guiding section and a material feeding section extending in a vertical direction intersecting the material guiding direction and connected to the material guiding section. The stopping unit comprises a plurality of stopping modules respectively arranged on the substrates. Each stopping module has a first driving member connected to the control unit by a signal, and a stopping member whose position corresponds to the respective material guiding section and is driven by the first driving member to move along the material guiding direction. The control unit of the tube feeding device The method comprises the following steps: (A) carrying the pipes by a plurality of carrying belts of the carrying unit and driving the pipes to approach the notches; (B) operating the control unit to store size information corresponding to the pipes; (C) controlling the first driving members to drive the stoppers to move along the material guiding direction and define a plurality of stoppers with the placement surfaces according to the size information; (D) the control unit controls a reel-up rod of the material-carrying unit to rotate and reel up the material-carrying belts, so that the tubes approach the base unit and enter the material-guiding sections of the substrates; and (E) the control unit controls each stopper to move along the material-guiding direction toward the respective material-feeding sections, so that one of the tubes enters the material-feeding section.

The effect of the present invention is that the control unit drives the blocking members to move along the material guiding direction, and respectively defines the placement areas for one of the pipes to rest with the placement surfaces, thereby preventing more than one pipe from entering the feeding sections and causing abnormal bending, thereby achieving the effect of reducing the error rate of the feeding operation.

1: Base unit

11: Base

12: Substrate

121: Missing slot

122: Material guide section

123: Feeding section

124: Placement surface

125: Placement area

126: Channel

2: Carrying unit

21: Carrying rack

22: Rolling and closing

23: Auxiliary wheel

24: Carrying straps

241: Fixed end

242: Scroll end

3: Blocking unit

31: Block module

311: First drive element

312: Stopper

313: The first built-in drive unit

314: Stop the main body

315:Blocking sensor

316:Conveyor belt

317: Rail assembly

4: Limiting unit

41: Limit module

411: Second drive element

412: Limiting parts

413: Second built-in drive unit

414: Limiting body

415: Pressed parts

416: The third built-in drive unit

417: Pressing body

5: Control unit

9: Pipe fittings

D1: Left and right direction

D2: Material guiding direction

D3: Up and down direction

D4: Leaning direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a block diagram of an embodiment of the pipe feeding device of the present invention; FIG. 2 is a three-dimensional diagram of the embodiment and a pipe; FIG. 3 is a side view of the embodiment; FIG. 4 is an incomplete front view of the embodiment after removing a carrying unit; FIG. 5 is a cross-sectional view of the embodiment, corresponding to the cross-sectional direction indicated by the V-V line of FIG. 4; FIG. 6 is A view similar to FIG. 3 illustrates the relative relationship between the embodiment and a plurality of pipe fittings, and illustrates that a limiter of one of the limiter modules of a limiter unit of the embodiment moves along abutment direction; FIG. 7 is an incomplete front view enlarged view, illustrating that after the carrying unit of the embodiment is removed, one of the limiters moves along the abutment direction; FIG. 8 is a view similar to FIG. 5, illustrating the relative relationship between the embodiment and the pipe fittings, and illustrates that a stopper unit of the embodiment FIG. 9 is a view similar to FIG. 6 , illustrating the relative relationship between the embodiment and the pipe fittings, and illustrating that a limiting body of one of the limiting members of the embodiment moves along a material guiding direction; FIG. 10 is a view similar to FIG. 8 , illustrating the relative relationship between the embodiment and the pipe fittings, and illustrating that a material pressing member of one of the limiting modules of the embodiment moves along the abutting direction, and the The one of the blocking bodies of the embodiment moves to a stop position; FIG. 11 is a view similar to FIG. 10, illustrating the relative relationship between the embodiment and the pipe fittings, illustrating that the one of the blocking bodies of the embodiment moves to a standby position; and FIG. 12 is a view similar to FIG. 11, illustrating the relative relationship between the embodiment and the pipe fittings, illustrating that the one of the blocking bodies of the embodiment is away from a placement surface of one of the substrates of a base unit along the abutting direction.

Referring to Figures 1 and 2, an embodiment of the pipe feeding device of the present invention is suitable for feeding a plurality of pipes 9. The embodiment includes a base unit 1, a carrying unit 2, a blocking unit 3, a limit unit 4 and a control unit 5.

Referring to Figures 3 and 4, the base unit 1 includes a base 11, and a plurality of substrates 12 disposed on the base 11 at intervals along a left-right direction D1. Each substrate 12 defines a slot 121 for the pipes 9 to enter. Each slot 121 has a guide section 122 extending along a guide direction D2, and an inlet section 123 extending along a vertical direction D3 intersecting the guide direction D2 and connected to the guide section 122. Each substrate 12 has a placement surface 124 located below each guide section 122.

In this embodiment, the number of the substrates 12 is four, but not limited thereto. The number of the substrates 12 depends on the length of the tubes 9. Therefore, in a variation of this embodiment, the number of the substrates 12 can be changed to two to be suitable for another shorter tube.

Referring to Figures 2, 4 and 5, the carrying unit 2 includes a carrying rack 21, a winding rod 22 rotatably disposed on the base 11 of the base unit 1, a plurality of auxiliary wheels 23 rotatably disposed on the base plates 12 and located above the winding rod 22 and adjacent to the grooves 121, and a plurality of carrying belts 24 disposed between the carrying rack 21 and the winding rod 22 and used to carry the pipes 9. Each carrying belt 24 has a fixed end 241 fixed to the carrying rack 21, and a reeling end 242 opposite to the fixed end 241 and fixed to the reeling rod 22. The fixed end 241 of each carrying belt 24 is higher than the auxiliary wheels 23 along the up-down direction D3. The carrying belts 24 are arranged between the carrying rack 21 and the reeling rod 22 and movably contact the upper side of the auxiliary wheels 23. The reeling rod 22 is used to rotate and reel the carrying belts 24 by driving, so as to drive the pipes 9 to approach the notches 121. In this embodiment, the number of the carrying belts 24 is six, but not limited thereto. The number of the carrying straps 24 also depends on the length of the pipes 9.

The stopping unit 3 includes a plurality of stopping modules 31 respectively disposed on the substrates 12, each stopping module 31 having a first driving member 311, a stopping member 312 whose position corresponds to the respective material guiding section 122 and is driven by the first driving member 311 to move along the material guiding direction D2, a conveyor belt 316 rotatably disposed on the respective substrate 12 driven by the first driving member 311, and a guide rail assembly 317 disposed on the respective substrate 12 and extending along the material guiding direction D2.

The number of the blocking modules 31 is the same as the number of the substrates 12. In this embodiment, the number of the blocking modules 31 is also four, and is not limited thereto. In addition, referring to FIG. 1 , for simplicity, only two blocking modules 31 are drawn as examples to illustrate their signal connection relationship with the control unit 5.

Referring to Figures 1, 4 and 5, each stopper 312 is mounted on each conveyor belt 316 and slidably disposed on each guide rail assembly 317, and is driven by each first driving member 311 to move along the material conveying direction D2. Each stopper 312 has a first built-in driving portion 313 mounted on each conveyor belt 316 and signal-connected to the control unit 5, a stopper body 314 driven by the first built-in driving portion 313 to move along abutment direction D4 substantially perpendicular to the material conveying direction D2, and a stopper sensor 315 signal-connected to the control unit 5 and used to sense and generate a pipe sensing signal.

Referring to FIG. 3 and FIG. 4 , the limiting unit 4 includes a plurality of limiting modules 41 respectively disposed on the substrates 12. Each limiting module 41 is opposite to the respective blocking module 31 along the left-right direction D1, and has a second driving member 411 disposed on the respective substrate 12, a limiting member 412 whose position corresponds to the respective material guide section 122, and a material pressing member 415 installed on the respective substrate 12.

The number of the limit modules 41, the number of the blocking modules 31 and the number of the substrates 12 are the same. In this embodiment, the number of the limit modules 41 is also four, and is not limited thereto. In addition, referring to FIG. 1 , for the sake of simplicity, only two limit modules 41 are drawn as examples to illustrate their signal connection relationship with the control unit 5.

In addition, referring to FIG. 4 , the arrangement relationship between each limit module 41 and each of the stop modules 31 can be interchanged. For example, two of the limit modules 41 located on the right side of FIG. 4 are arranged on the right side of the corresponding substrates 12, and two of the limit modules 41 located on the left side of FIG. 4 are arranged on the left side of the corresponding substrates 12. In other words, whether the limit modules 41 are arranged on the left or right side of the substrates 12, their functions are not affected. Each stop module 31 is arranged in correspondence with each of the limit modules 41 along the left-right direction D1.

Referring to Figures 1, 6 and 7, each stopper 412 is driven by the respective second drive member 411 to move along the abutment direction D4, and has a second built-in drive portion 413 mounted on the respective substrate 12 and connected to the control unit 5 by signal, and a stopper body 414 driven by the second built-in drive portion 413 to move along the material guiding direction D2.

Each pressing member 415 has a third built-in driving portion 416 connected to the control unit 5 by a signal, and a pressing body 417 driven by the third built-in driving portion 416 to move along the abutting direction D4.

Referring to FIG. 1 , the control unit 5 signals connect the first drive members 311 and the second drive members 411 and stores the size information corresponding to the pipe members 9 .

Referring to FIG. 1 and FIG. 6 , the control unit 5 can control the second driving members 411 to drive the limiting members 412 to move along the abutment direction D4 according to the size information, so that one of the pipes 9 can enter the feeding sections 123 from between the limiting members 412 and the placing surfaces 124 when the blocking unit 3 moves toward the respective feeding sections 123 along the material guiding direction D2.

Furthermore, referring to FIG. 1 , FIG. 4 and FIG. 8 , the control unit 5 can control the first driving members 311 to drive the blocking members 312 to move along the material guiding direction D2 according to the size information, so as to define a plurality of placement areas 125 for one of the pipes 9 to rest with the placement surfaces 124. In this embodiment, the number of the placement areas 125 is also four, and is not limited thereto.

Furthermore, the control unit 5 can control the first built-in driving parts 313 to drive the blocking bodies 314 to move along the abutment direction D4 according to the size information, so as to cooperate with the placement surfaces 124 to define the placement areas 125.

Furthermore, referring to FIG. 1 , FIG. 8 and FIG. 9 , the control unit 5 can control the second built-in driving parts 413 to drive the limiting bodies 414 to move along the material guiding direction D2 according to the size information, so as to match and exclude the overlapping ones among the pipes 9 on the placement surfaces 124 .

Furthermore, referring to FIG. 1 and FIG. 10 , the control unit 5 can control the third built-in driving parts 416 to drive the pressing bodies 417 to move along the abutment direction D4 according to the size information when receiving the pipe sensing signals from the blocking sensors 315 to cooperate with pressing the other one of the pipes 9 located on the placement surfaces 124 and connected thereto.

Next, after introducing the structural features of the embodiment, the actual steps of operating the embodiment are explained. The actual steps are as follows:

Step S11: Referring to FIG. 1 and FIG. 5, the carrying belts 24 of the carrying unit 2 carry the pipes 9 and drive the pipes 9 toward the notches 121.

Step S12: The control unit 5 is operated to store the size information corresponding to the pipes 9.

Step S13: Referring to FIG. 1, FIG. 6 and FIG. 7, the control unit 5 controls the second driving members 411 to drive the limiting members 412 to move along the abutting direction D4 according to the size information, and a plurality of channels 126 are defined between the limiting members 412 and the placement surfaces 124. The number of the channels 126 is the same as the number of the substrates 12. In this embodiment, the number of the channels 126 is also four, and is not limited thereto.

Step S14: Referring to FIG. 1 and FIG. 8 , the control unit 5 controls the first driving members 311 to drive the blocking members 312 to move along the material guiding direction D2 according to the size information.

Step S15: The control unit 5 controls the first built-in driving parts 313 according to the size information to drive the blocking bodies 314 to move along the abutment direction D4, and define the placement areas 125 for one of the pipes 9 to rest with the placement surfaces 124.

Step S16: The control unit 5 controls the reeling rod 22 of the carrying unit 2 to rotate and reel in the carrying belts 24, so that the tubes approach the base unit 1 and enter the guide sections 122 of the substrates 12.

Step S17: Referring to FIG. 1 and FIG. 9, the control unit 5 controls the second built-in driving parts 413 according to the size information to drive the limiting bodies 414 to move along the material guiding direction D2 to remove the overlapping ones of the pipes 9.

Step S18: Referring to Figures 1, 10 and 11, the control unit 5 controls each stopper 312 to move along the material guiding direction D2 toward the respective material feeding section 123, and moves to a stop position spaced apart from the respective material pressing body 417 along the material guiding direction D2 according to the size information (as shown in Figure 10).

Step S19: After receiving the pipe sensing signals from the blocking sensors 315, the control unit 5 controls the third built-in driving parts 416 to drive the pressing bodies 417 to move along the abutting direction D4 according to the size information, so as to press the other one of the pipes 9 located on the placement surfaces 124 and connected to the pipes 9. More precisely, the control unit 5 determines that at least one pipe is still blocked according to the pipe sensing signals received, and thus controls and drives the pressing bodies 417 to move a distance of one pipe along the material guiding direction D2 according to the size information, thereby ensuring that the other one of the pipes 9 is pressed to be connected to the pipes 9. Even if the other of the pipe fittings 9 is connected to the other pipe fittings 9 at the rear, the other pipe fittings 9 will still be blocked by the other of the pipe fittings 9 (because they are pressed by the pressing bodies 417), thereby preventing more than one pipe fitting 9 from entering the feeding sections 123.

Step S20: Referring to Figures 1, 11 and 12, the control unit 5 controls each stopper 312 to move along the material guiding direction D2 toward the respective material feeding section 123, and moves to a standby position spaced from the stop position along the material guiding direction D2, and then controls each first built-in driving part 313 to drive the respective stopper body 314 away from the respective placement surface 124 along the abutment direction D4, so that one of the pipes 9 is not blocked by the stopper body 314 and enters the material feeding section 123 through the channels 126.

Therefore, the pipe feeding device and control method of the present invention can produce the following effects:

(i) By providing the blocking unit 3 and the control unit 5, the control unit 5 can drive the blocking members 312 to move along the material guiding direction D2, and respectively define the placement areas 125 for one of the pipes 9 to rest with the placement surfaces 124, thereby preventing more than one pipe 9 from entering the feed sections 123 and causing abnormal bending.

(ii) By providing the limiter unit 4 and the control unit 5, the control unit 5 can drive the limiters 412 to move along the abutment direction D4, so that one of the pipes 9 can enter the feed sections 123 from between the limiters 412 and the placement surfaces 124, so as to avoid more than one pipe 9 overlapping and entering the feed sections 123 to cause abnormal bending.

(III) By providing the limit unit 4 and the control unit 5, the control unit 5 can drive the pressing bodies 417 of the pressing parts 415 to press the other one of the pipes 9 located on the placement surfaces 124 and connected to the other one of the pipes 9, thereby preventing more than one pipe 9 from entering the feeding sections 123 and causing abnormal bending.

(iv) The control unit 5 controls the carrying unit 2, the blocking unit 3 and the limiting unit 4 to execute the control method of the pipe feeding device, defining the placement areas 125 for the one of the pipes 9 to stop, and the passages 126 for the one of the pipes 9 to pass through, so that the one of the pipes 9 enters the feeding sections 123, so as to avoid more than one pipe 9 overlapping and entering the feeding sections 123 and causing abnormal bending, so as to achieve the effect of reducing the error rate of the feeding operation.

In summary, the pipe feeding device and control method of the present invention can achieve the purpose of the present invention through simple structure and steps.

However, the above is only an example of the implementation of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the patent of the present invention.

1: Base unit

11: Base

12: Substrate

2: Carrying unit

21: Carrying rack

23: Auxiliary wheel

24: Carrying straps

3: Blocking unit

31: Block module

4: Limiting unit

41: Limit module

9: Pipe fittings

D1: Left and right direction

D3: Up and down direction

Claims (12)

A pipe loading device is suitable for loading a plurality of pipes, the pipe loading device comprises: a base unit, including a base, and a plurality of base plates arranged on the base at intervals along a left-right direction, each base plate defines a slot for the pipes to enter, each slot has a guide section extending along a guide direction, and an inlet section extending along an up-down direction intersecting the guide direction and connected to the guide section, each base plate has a placement surface below each of the guide sections; a carrying unit, including a carrying rack, a winding rod rotatably arranged on the base unit, and a plurality of carrying belts arranged between the carrying rack and the winding rod and used to carry the pipes, each carrying belt having a fixed end fixedly connected to the carrying rack, and a take-up end opposite to the fixed end and fixedly connected to the take-up rod, the take-up rod is used to be driven to rotate and take up the carrying belts to drive the pipes to approach the slots; a blocking unit, including a plurality of blocking modules respectively arranged on the substrates, each blocking module having a first driving member and a position corresponding to the respective guide section and driven by the first driving member A stopper that moves along the material guiding direction when the first drive members are driven; and a control unit that is signal-connected to the first drive members and stores size information corresponding to the pipes. The control unit can control the first drive members to drive the stoppers to move along the material guiding direction according to the size information, so as to define a plurality of placement areas for one of the pipes to stop with the placement surfaces. The pipe feeding device as described in claim 1, wherein each blocking module also has a conveyor belt that can be driven by the first driving member and is rotatably arranged on the respective substrate, and a guide rail set that is arranged on the respective substrate and extends along the material conveying direction, each blocking member is mounted on the respective conveyor belt and can be slidably arranged on the respective guide rail set, and is driven by the respective first driving member to move along the material conveying direction. The pipe feeding device as described in claim 2, wherein each stopper has a first built-in driving part installed on each of the conveyor belts and connected to the control unit by signal, a stopper body driven by the first built-in driving part to move along an abutment direction substantially perpendicular to the material feeding direction, and a stopper sensor connected to the control unit by signal and used to sense and generate a pipe sensing signal, and the control unit can control the first built-in driving parts to drive the stopper bodies to move along the abutment direction according to the size information, so as to cooperate with the placement surfaces to define the placement areas. The pipe feeding device as described in claim 3 further comprises a limiting unit, which comprises a plurality of limiting modules respectively arranged on the substrates, each limiting module is opposite to the respective blocking modules along the left-right direction, and has a second driving member arranged on the respective substrates, and a limiting member whose position corresponds to the respective material guide section, each limiting member is driven by the respective second driving member to move along the abutting direction, the control unit is signal-connected to the second driving members, and can control the second driving members to drive the limiting members to move along the abutting direction according to the size information, so that one of the pipes can enter the material feed section from between the limiting members and the placement surfaces when the blocking unit moves along the material guide direction toward the respective material feed section. The pipe feeding device as described in claim 4, wherein each stopper has a second built-in driving part mounted on the respective substrate and connected to the control unit by signal, and a stopper body driven by the second built-in driving part to move along the material guiding direction, and the control unit can control the second built-in driving parts to drive the stopper bodies to move along the material guiding direction according to the size information, so as to cooperate with and exclude the overlapped pipes on the placement surfaces. As described in claim 5, the pipe feeding device, wherein each limiting module further has a pressing piece mounted on the respective substrate, each pressing piece has a third built-in driving part connected to the control unit by signal, and a pressing body driven by the third built-in driving part to move along the abutting direction, and the control unit can control the third built-in driving parts to drive the pressing bodies to move along the abutting direction according to the size information when receiving the pipe sensing signals from the blocking sensors, so as to cooperate with pressing the other one of the pipes located on the placement surfaces and connected to the other one of the pipes. The pipe feeding device as described in claim 1, wherein the carrying unit further comprises a plurality of auxiliary wheels rotatably arranged on the base plates and located above the winding rod and adjacent to the slots, the carrying belts are arranged between the carrying frame and the winding rod and movably contact the upper sides of the auxiliary wheels, and the fixed end of each carrying belt is higher than the auxiliary wheels along the up-down direction. A control method for a pipe feeding device is applicable to a pipe feeding device for feeding a plurality of pipes. The pipe feeding device comprises a base unit, a carrying unit, a blocking unit and a control unit. The base unit comprises a plurality of substrates arranged at intervals along a left-right direction. Each substrate defines a slot for the pipes to enter and has a placement surface. Each slot has a material guide along a guide surface. The pipe feeding device comprises a material guide section extending in a direction, and a material feeding section extending in a vertical direction intersecting the material guide direction and connected to the material guide section. The blocking unit comprises a plurality of blocking modules respectively arranged on the substrates, each blocking module having a first driving member connected to the control unit by a signal, and a blocking member whose position corresponds to the respective material guide section and is driven by the first driving member to move along the material guide direction. The control method comprises the following steps: (A) carrying the pipes by a plurality of carrying belts of the carrying unit and driving the pipes to approach the notches; (B) storing size information corresponding to the pipes by the control unit through operation; (C) controlling the first driving members to drive the stoppers to move along the material guiding direction and to define the stoppers with the placement surfaces according to the size information; (D) the control unit controls a reel of the carrying unit to rotate and reel in the carrying belts, so that the pipes approach the base unit and enter the guide sections of the substrates; and (E) the control unit controls each stopper to move along the guide direction toward the respective feed sections, so that one of the pipes enters the feed sections. The control method of the pipe feeding device as claimed in claim 8, wherein the pipe feeding device further comprises a limit unit, the limit unit comprises a plurality of limit modules respectively arranged on the substrates, each limit module is opposite to the respective stop module along the left-right direction, and has a second driving member connected to the control unit by a signal, and a limit member whose position corresponds to the respective material guide section, and the control method of the pipe feeding device further comprises a step between the step (B) and the step (C) In step (F), the control unit controls the second driving members to drive the limiting members to move along abutment direction substantially perpendicular to the material guiding direction according to the size information, and a plurality of channels are defined between the limiting members and the placement surfaces; in step (E), the control unit controls each stopper to move along the material guiding direction toward the respective material feeding section, so that one of the pipes enters the material feeding section through the channels. The control method of the pipe feeding device as described in claim 9, wherein each stopper has a first built-in driving part connected to the control unit by a signal, and a stopper body driven by the first built-in driving part to move along the abutting direction, and the control method of the pipe feeding device further includes a step (G) between the step (C) and the step (D), in which the control unit controls the first built-in driving parts to drive the stopper bodies to move along the abutting direction according to the size information. The control method of the pipe feeding device as described in claim 10, wherein each stopper has a second built-in driving part connected to the control unit by a signal, and a stopper body driven by the second built-in driving part to move along the material feeding direction. The control method of the pipe feeding device further includes a step (H) between the step (D) and the step (E), in which the control unit controls the second built-in driving parts to drive the stopper bodies to move along the material feeding direction according to the size information, so as to remove the overlapped pipes. The control method of the pipe feeding device as claimed in claim 11, wherein each stopper also has a stopper sensor which is connected to the control unit by signal and is used to sense and generate a pipe sensing signal, each limit module also has a pressing member installed on the respective substrate, each pressing member has a third built-in driving part which is connected to the control unit by signal, and a pressing body which is driven by the third built-in driving part to move along the abutting direction, and the step (E) includes the following steps: (E-1) controlling each stopper to move toward the respective feeding section along the material guiding direction by the control unit, and moving to a stop position spaced apart from the respective pressing body along the material guiding direction according to the size information; (E-2) After receiving the sensing signals of the pipe fittings from the blocking sensors, the control unit controls the third built-in driving parts to drive the pressing bodies to move along the abutting direction according to the size information, so as to cooperate with the other one of the pipe fittings that is located on the placement surfaces and connected to the other one; and (E-3) the control unit controls each blocking member to move along the material guiding direction toward the respective material feeding section, and to a standby position spaced from the stop position along the material guiding direction, and then controls each first built-in driving part to drive the respective blocking body away from the respective placement surface along the abutting direction, so that the one of the pipe fittings is not blocked by the blocking bodies and enters the material feeding sections.

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