CN108557142A - A kind of binding apparatus - Google Patents

Abstract

The invention discloses a kind of binding apparatus, including strapping clamp system, strapping strainer, main shaft and the first cam being sequentially arranged on main shaft, the second cam and third cam；Strapping clamp system includes the first supporting member, the second supporting member, cutting member and heating plate；Strapping strainer includes supporting rod, the first roller and the second roller；The device of the invention in strapping strainer mainly using making strapping extract out and enter clamp system, winding is fixed the initiating terminal of strapping using the first supporting member of clamp system after tying up object, then strapping is continued to be tensioned using strainer, the initiating terminal of strapping and end are heated by the heating plate on the second supporting member, the two is set to be bonded together, the end of tape of tying up after tensioning is compressed and cut off by cutting member simultaneously, realizes quickly and effectively tying up to wrappage.

Description

a binding device

technical field

The invention belongs to the technical field of packaging and relates to carton wrapping and binding, in particular to a binding device.

Background technique

Due to the development of the express delivery industry, customers and merchants are paying more and more attention to the safety of express items during transportation, and gradually find that only relying on tape packaging can no longer achieve the safety of packages during transportation. At this time, the package must be bundled to increase the safety during transportation. The development prospect of automatic carton strapping machine is very broad, especially when the development of online shopping is more extensive. However, the styles of domestic strapping machines are relatively simple, and most of them are hydraulic strapping machines, which are noisy and have a low degree of automation. This type of strapping machine is not suitable for the express delivery industry.

Contents of the invention

Aiming at the defects and deficiencies of the prior art, the present invention provides a binding device, which solves the problem of single function and bulkiness of the existing binding machine.

In order to achieve the above object, the present invention adopts the following technical solutions to achieve:

A strapping device, comprising a strap clamping mechanism, a strap tensioning mechanism, a main shaft, and a first cam, a second cam and a third cam sequentially installed on the main shaft;

The strap clamping mechanism includes a first abutting piece, a second abutting piece, a shearing piece and a heating plate, the bottom end of the first abutting piece abuts against the first cam, and the shearing piece Set on the top of the first abutting piece, the shearing piece rises with the first abutting piece to cut off the strap; the heating plate is set on the shearing piece, and the starting end and the end of the strapping are welded together by the heating plate ;

The bottom end of the second abutting member is abutted against the second cam, and the top end of the second abutting member is provided with a first through hole for the strap to pass through;

The strap tensioning mechanism includes a support rod, a first roller and a second roller, the bottom end of the support rod abuts against the third cam, the first roller is connected to the top of the support rod, and the first roller As the support bar descends close to the second roller, the strap is clamped between the first roller and the second roller, and the relative rotation of the first roller and the second roller drives the strap to pass through the first roller on the second abutting member. A through hole.

Specifically, the first abutting piece includes a first pressure head, a first connecting rod and a first U-shaped piece, the first connecting rod is connected between the first pressure head and the first U-shaped piece, and the The shearing member is arranged on the top of the first pressure head; the first pressing roller is arranged in the U-shaped groove of the first U-shaped member, the first pressing roller can rotate in the U-shaped groove, and the first pressing roller touches the top on the first cam;

The second abutting piece includes a second pressure head, a second connecting rod and a second U-shaped piece, the first through hole is arranged on the top of the first pressure head; the U-shaped groove of the second U-shaped piece A second pressing roller is provided, the second pressing roller can rotate in the U-shaped groove, and the second pressing roller abuts against the second cam.

Further, it also includes a support frame, the main shaft is installed on the support frame, and the support frame is provided with a third through hole through which the first abutment piece and the second abutment piece pass;

A first spring is sheathed on the first abutting member between the support frame and the first U-shaped member, and a first spring is also sheathed on the second abutting member located between the support frame and the second U-shaped member .

Specifically, a cross bar is hinged at the top of the support rod, and a third U-shaped piece is connected to the bottom end of the support rod. A third pressure roller is arranged in the U-shaped groove of the third U-shaped piece. The third pressure roller can Rotating in the U-shaped groove, the third pressure roller is against the third cam;

The first roller is arranged at one end of the crossbar, and the other end of the crossbar is suspended at the end of the second spring; the second roller is installed on a rotating shaft.

Specifically, the strap clamping mechanism, the strap tensioning mechanism, the main shaft, the first cam, the second cam and the third cam are installed in the housing;

A storage compartment for carrying objects to be bound is arranged above the housing, and the inside of the housing is connected with the storage compartment. The size of the storage compartment is such that a strapping belt is reserved between the objects to be bound and the storage compartment. passage through.

Further, the bottom of the storage compartment is provided with an isolation plate for placing objects to be bound, and the first abutment piece and the second abutment piece are arranged directly under the isolation plate;

The two ends of the bottom surface of the isolation plate are provided with L-shaped plates, one end of the L-shaped plate is fixed on the isolation plate, and a gap for the binding strap to pass is formed between the other end of the L-shaped plate and the isolation plate. .

Further, a protrusion is provided on the bottom surface of the isolation plate, and a groove matching the protrusion is provided on the shearing piece below the protrusion.

Further, the raised bottom is provided with a sensing device, and when the strap touches the raised bottom, the sensing device can send a signal to the control unit, and the control unit controls the strap tensioning mechanism to perform a tensioning operation.

Further, a tension switch for controlling the rotation of the second roller is suspended from the top of the housing through a third spring, and the tension switch will be squeezed when the tension of the strap reaches a certain level.

Further, it also includes a tape storage box, the tape outlet of the tape storage box is located near the support rod, and the support rod is provided with a second through hole for the strap to pass through.

Compared with prior art, the beneficial effect of the present invention is:

The device of the present invention mainly uses the rotation between the first roller and the second roller in the strap tensioning mechanism to draw the strap out and enter the clamping mechanism. The starting end of the strap is fixed, and then the tensioning mechanism is used to continue tensioning the strapping, and the starting end and the end of the strapping are heated by the heating plate on the second abutting member, so that the two are bonded together. The cut piece compresses and cuts off the end of the tensioned strapping to realize fast and effective bundling of the wrapping. Compared with the traditional hydraulic strapping machine, the strapping device of the present invention has less noise in the strapping process and can be automatically controlled, so it is more suitable for the express delivery industry.

Other features and advantages of the present invention will be described in detail in the following detailed description.

Description of drawings

Figure 1 is a front view of the device of the present invention.

Fig. 2 is a structural schematic diagram of the strap clamping mechanism of the present invention.

Fig. 3 is a left side view of the device of the present invention.

Fig. 4 is a schematic structural view of the first propping member.

Fig. 5 is a schematic structural view of the second propping member.

Fig. 6 is a structural schematic diagram of a shearing piece.

Fig. 7 is a structural schematic diagram of the strap tensioning mechanism.

Fig. 8 is a schematic diagram of the overall structure with three abutting members.

FIG. 9 is a schematic diagram of the cam movement in FIG. 1 of the present invention.

The meanings of the symbols in the attached drawings: 1-main shaft, 4-binding belt, 5-housing, 6-loading bin, 7-isolation plate, 8-support frame, 9-tape storage box, P-object to be bundled;

11-the first cam, 12-the second cam, 13-the third cam;

21-first abutting member, 22-second abutting member, 23-shearing member, 24-first pressing roller, 25-second pressing roller, 26-first spring, 27-heating plate, 28-the first Four abutting pieces, 29-the fourth cam;

211-the first pressure head, 212-the first connecting rod, 213-the first U-shaped piece;

221-the second pressure head, 222-the second connecting rod, 223-the second U-shaped piece, 224-the first through hole;

231-groove, 232-tip, 233-weight-reducing groove;

31-support bar, 32-first roller, 33-second roller, 34-crossbar, 35-third pressure roller, 36-second spring, 37-third spring, 38-tension switch; 311-the first Three U-shaped parts, 312-the second through hole;

61-passage; 71-L-type plate, 72-gap, 73-protrusion; 91-exit with the mouth.

The specific content of the present invention will be further explained in detail below in conjunction with the examples.

Detailed ways

Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific examples, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the protection scope of the present invention.

In the present invention, unless stated otherwise, the used orientation words such as "upper and lower" usually refer to the definition based on the drawings of the corresponding drawings, and "inner and outer" refer to the contours of the corresponding parts. inside and out.

As shown in Figure 1, the present invention discloses a strapping device, including a strap clamping mechanism, a strap tensioning mechanism, a main shaft 1, and a first cam 11, a second cam 12 and a third cam installed on the main shaft 1 in sequence. cam 13;

The strap clamping mechanism comprises a first abutting member 21, a second abutting member 22, a shearing member 23 and a heating plate 27, the bottom end of the first abutting member 21 abuts on the first cam 11, and the shearing member 23 is arranged on the top of the first abutting member, and the shearing member 23 rises with the first abutting member 21 to cut off the strapping 4; the heating plate 27 is arranged on the shearing member 23, and the starting end of the strapping 4 and the The ends are welded together; the bottom end of the second abutment member 22 is abutted against the second cam 12, and the top end of the second abutment member 22 is provided with a first through hole 224 for the strap 4 to pass through;

The strap tensioning mechanism comprises a support rod 31, a first roller 32 and a second roller 33, the bottom end of the support rod 31 abuts against the third cam 13, the first roller 32 is connected to the top of the support rod 31, and the first roller 32 As the support bar 31 descends close to the second roller 33, the strap is clamped between the first roller 32 and the second roller 33, and the relative rotation of the first roller and the second roller drives the strap through the second abutment The first through hole 224 on the piece.

The device of the present invention mainly uses the strap tensioning mechanism to draw the strap out and enter the clamping mechanism. After wrapping the bundled object, the first abutting member 21 of the clamping mechanism is used to fix the starting end of the strap, and then the tensioning The mechanism continues to tension the strapping, and the heating plate 27 on the second abutment member 22 heats the starting end and the end of the strapping strap, so that the two are bonded together. The end of the strap is compressed and cut to achieve fast and effective bundling of the parcel.

Specifically, as shown in FIG. 4 , the first abutting member 21 includes a first pressing head 211, a first connecting rod 212 and a first U-shaped member 213, and the first connecting rod 212 is connected between the first pressing head 211 and the first pressing head 211. Between the U-shaped parts 213, the top of the first pressure head 211 is provided with a shearing part 23; the first pressing roller 24 is arranged in the U-shaped groove of the first U-shaped part 213, wherein, on the groove wall of the U-shaped groove, there are Mounting hole, the first pressure roller is installed on the installation hole by a connecting shaft, the first pressure roller 24 can rotate in the U-shaped groove, and the first pressure roller 24 abuts on the first cam 11; as the diameter of the cam increases Change, the first pressure roller against the top rises or falls.

As shown in Figure 5, the second abutting member 22 includes a second pressure head 221, a second connecting rod 222 and a second U-shaped piece 223, and the first through hole 224 is arranged on the top of the first pressure head 221; the second U-shaped The U-shaped groove of the member 223 is provided with a second pressure roller 25 that rotates with the cam, and a mounting hole is provided on the wall of the U-shaped groove, and the second pressure roller 25 is installed on the mounting hole through a connecting shaft. At the same time, the second pressing roller 25 can rotate in the U-shaped groove, and the second pressing roller 25 abuts against the second cam 12 . The bottoms of the first pressing head 211 and the second pressing head 221 of the crimping mechanism are flush to ensure that the first cam 11 , the second cam 12 and the radius of the base circle controlling their movement are the same.

Specifically, as shown in Figure 7, a crossbar 34 is hinged at the top of the support rod 31, and a third U-shaped piece 311 is connected to the bottom end of the support rod, and a third pressure roller 35 is arranged in the U-shaped groove of the third U-shaped piece 311. , the third pressing roller 35 can rotate in the U-shaped groove, and the third pressing roller 35 abuts against the third cam 13 . The first roller 32 is arranged on one end of the crossbar 34, and the other end of the crossbar is suspended at the end of the second spring 36, and the second spring 36 can be connected to the top of the housing 5 or other fixed structures. The second roller 33 is installed on a rotating shaft, The rotating shaft can be installed on the casing or other fixed structures, and the second roller 33 is directly controlled by the motor connection. Further, a plate is connected to the top of the housing by bolts and nuts, and the two ends of the plate are respectively connected to the second spring 36 and the third spring 37, which can make the component installation more convenient and easy to disassemble; wherein, the second spring 36 makes The contact between the first roller and the second roller is closer, which makes the belt feeding process more stable. Preferably, the tangent line between the first roller and the second roller coincides with the axis of the first through hole 224 . Ensure the accuracy with which the strap is inserted into the first through hole.

Specifically, the first through hole 224 is slit-shaped, matching the shape of the strapping.

Specifically, as shown in FIG. 6 , the cutting piece is provided with a tip 232 for cutting the strapping. Wherein, the shearing piece can be a separate component, and then fixed on the second indenter 211, or can be integrally processed with the second indenter. Specifically, as shown in FIG. 2 , the heating plate is located on the shearing piece between the tip 232 and the groove 231 , which is exactly where the beginning and end of the strap join.

As shown in FIG. 6 , in one embodiment of the present invention, in order to reduce the mass, a weight-reducing groove 233 is provided on the shearing piece.

As shown in Figure 1, in one embodiment of the present invention, the strap clamping mechanism, the strap tensioning mechanism, the main shaft 1, the first cam 11, the second cam 12 and the third cam 12 are installed in the housing 5 , the top of the housing 5 is provided with a storage bin 6 for carrying objects to be bundled, the size of the storage bin 6 is such that a passage for the binding belt 4 to pass is reserved between the object P to be bound and the storage bin 6, and the casing 5 The interior is connected with the storage compartment 6, so that the first abutment piece 21 and the second abutment piece 22 are abutted against the binding objects, and the binding strap 4 in the casing enters the channel 61 of the storage compartment

As shown in Fig. 2, in one embodiment of the present invention, the device further includes a support frame 8, which is arranged in the housing 5, the support frame is H-shaped, and is fixed to the bottom of the housing by bolts. Preferably, stiffening ribs are provided at the connection between the support frame and the shell to increase the strength and stability of the connection. The main shaft 1 is installed on the support frame 8, and the support frame 8 is provided with a third through hole (not marked in the figure) through which the first abutment member 21 and the second abutment member 22 pass, and the third through hole is connected with the first abutment member 22. The first connecting rod 212 and the second connecting rod 222 cooperate to ensure that there will not be too much deviation during the movement.

As shown in Figure 2, in one embodiment of the present invention, in order to ensure the stability of the movement. The first abutting member 21 between the support frame 8 and the first U-shaped member 213 is sleeved with a first spring 26 , and the second abutting member 22 is located between the support frame 8 and the second U-shaped member 223 The first spring 26 is also sleeved.

As shown in Figure 1 , in one embodiment of the present invention, the bottom of the storage bin 6 is provided with a partition plate 7 for placing objects to be bound, and the first abutment member 21 and the second abutment member 22 are arranged on the front of the partition board 7. below. Preferably, the isolation plate is a thin steel plate, and the two ends of the bottom surface of the isolation plate 7 are provided with L-shaped plate parts 71 . One end of the L-shaped plate 71 is fixed on the isolation plate, and a gap 72 for the strap to pass is formed between the other end and the isolation plate 7. This gap is a slit type, and the size is enough for the strap to pass through. On the other hand, the isolation plate is supported on the housing through the L-shaped plate at its bottom, and when the binding is completed, the binding belt can be separated from the gap together with the binding objects.

Further, as shown in FIG. 3 , in one embodiment of the present invention, a protrusion 73 is also provided on the bottom surface of the isolation plate 7 , and a groove matching the protrusion 73 is provided on the shearing member 23 below the protrusion. 231; the groove cooperates with the protrusion to fix the binding strap.

Further, in one embodiment of the present invention, the bottom of the protrusion 73 is provided with a sensing device, and when the strap 4 touches the bottom of the protrusion, the sensing device can send a signal to the control unit, and the second cam 12 rotates, so that the second cam 12 rotates. The pressure head 221 begins to rise and press the end of the strapping 4, and then, the control unit controls the strapping tensioning mechanism to perform a tensioning operation, and the second roller 33 reverses to tighten the strapping.

Further, as shown in FIG. 7 , in one embodiment of the present invention, a tension switch 38 for controlling the rotation of the second roller 33 is suspended on the top of the housing 5 through a third spring 37. When the tension of the strap 4 Can extrude tension switch 38 when reaching certain. The control unit signals the end of the tensioning action. The motor that drives the second roller 33 to rotate will stop rotating, and at the same time, the first roller 32 is separated from the second roller 33 under the drive of the third cam 13 . Wherein, the third spring 37 is suspended on one end of the cross bar 34, and the third spring can make the contact between the tension switch and the binding strap more closely.

Further, as shown in Figure 1, in one embodiment of the present invention, this device also comprises storage tape box 9, and strapping is placed in the tape storage box, and circular roller is provided with in the storage tape box, guarantees The smoothness of strapping extraction. The outlet 91 of the tape storage box is located near the support rod 31, and the support rod 31 is provided with a second through hole 312 for the strap 4 to pass through. Preferably, the second through hole 312 is a slit type.

As shown in Figure 8, the device also includes a fourth cam 29 installed on the main shaft and a fourth abutment member 28 arranged above the fourth cam, the fourth abutment member 28 is arranged on the first abutment member 21 away from the second One side of the abutting member 22; the fourth abutting member includes a fourth pressure head, a fourth connecting rod and a fourth U-shaped piece, and a fourth pressure roller 281 is arranged in the U-shaped groove of the fourth U-shaped piece. The pressure roller 281 can rotate in the U-shaped groove, and the fourth pressure roller 281 abuts against the fourth cam 29 . Setting the fourth abutting member can further ensure the compression of the end of the strap after the tensioning ends. Wherein, the bottom of the fourth pressure head is flush with the bottoms of the first pressure head 211 and the second pressure head 221, so as to ensure that the radius of the base circle of the fourth cam and the first cam 11 etc. which control their movement are the same.

The binding method of the device of the present invention is described in detail below:

The control unit controls the rotation of the motor connected to the main shaft 1. After the main shaft 1 rotates at a certain angle, the third cam 13 drives the third pressure roller 35 that cooperates with it to move, so that the first roller 32 is lowered under the action of the support rod 31 and The second roller 33 is pressed together, and at this moment, the strap 4 is clamped between the first roller 32 and the second roller 33;

When the upper roller and the lower roller are pressed together, the first roller 32 and the second roller 33 rotate counterclockwise together, relying on the effect of friction, the strapping 4 is sent into the isolation plate 7 and the L-shaped plate at the bottom in the gap 72 between the pieces.

When the strap wraps around the object P to be bundled for one turn, when its starting end touches the sensing device at the bottom of the isolation plate protrusion 73, the control unit will receive a tension signal, and control the main shaft to rotate the second abutting member 22 to rise , make the second pressure head 221 press the initial end of the strapping;

At this time, the control unit controls the reverse rotation with the second roller 33, and the first roller 32 and the second roller 33 move together, so that the strap 4 is tightened under the action of friction, so that it is wrapped on the surface of the package. Excess straps will go into the storage box;

When the tension force on the strap reaches a certain level, the tension switch 38 will be pressed, and the control unit will receive a signal that the tension action ends. The motor that drives the second roller 33 to rotate will stop rotating. At this time, the first roller 32 will be separated from the second roller 33 under the action of the third cam and the support rod 31, and the unwinding and tensioning will end;

After the tensioning action is finished, under the action of the first cam 11, the first pressing head 211 on the first abutting member 21 rises, and utilizes the groove 231 on the shearing member 23 to press the tail end of the strapping.

Simultaneously, the heating plate 27 heats and melts the binding straps at the junction, and the two are welded together. After melting to a certain degree, the hot-melt plate withdraws. At the same time, the third pressure head will rise. While heating and pressing the strap, the tip 232 on the shear piece will cut off the strap, and the three pressure heads will descend in turn. After the bundling is completed, the bundled object P will be pushed away from the isolation board, into the bundle for the next object.

As shown in FIG. 9 , it is a schematic diagram of the movement of the three cams of the present invention, and the shapes of the three cams and their lifting against the abutting member are in accordance with this diagram.

In addition, it should be noted that the various specific technical features described in the following specific embodiments can be combined in any suitable way if there is no contradiction, as long as they do not violate the idea of the present invention, they should also be regarded as The content disclosed in the present invention.

Claims (10)

1. a kind of binding apparatus, which is characterized in that including strapping clamp system, strapping strainer, main shaft (1) and according to Secondary the first cam (11), the second cam (12) and third cam (13) on main shaft (1)；

The strapping clamp system includes the first supporting member (21), the second supporting member (22), cutting member (23) and heating plate (27), the bottom end of first supporting member (21) is supported on the first cam (11), and cutting member (23) setting is supported first Head part top, cutting member (23) rises with the first supporting member (21) cuts strapping (4)；Heating plate (27) setting is being sheared On part (23), the initiating terminal of strapping (4) and end are welded together by the heating plate (27)；

The bottom end of second supporting member (22) is supported on the second cam (12), and the top of the second supporting member (22) is provided with confession The first through hole (224) that strapping (4) passes through；

The strapping strainer includes supporting rod (31), the first roller (32) and the second roller (33), supporting rod (31) bottom End is supported on third cam (13), and first roller (32) is connected to the top of supporting rod (31), first roller (32) with The decline of supporting rod (31) makes strapping be clamped between the first roller (32) and the second roller (33) close to the second roller (33), and with The relative rotation of one roller and the second roller drives strapping (4) to pass through the first through hole (224) on the second supporting member.

2. binding apparatus as described in claim 1, which is characterized in that first supporting member (21) includes the first pressure head (211), head rod (212) and the first U-shaped part (213), the head rod (212) are connected to the first pressure head (211) And first between U-shaped part (213), and the cutting member (23) is provided at the top of first pressure head (211)；The first U-shaped part (213) the first pressure roller (24) is provided in U-type groove, the first pressure roller (24) can rotate in U-type groove, and the first pressure roller (24) is supported On the first cam (11)；

Second supporting member (22) includes the second pressure head (221), the second connecting rod (222) and the second U-shaped part (223), described First through hole (224) setting is at the top of the first pressure head (221)；It is provided with the second pressure in the U-type groove of the second U-shaped part (223) Roller (25), the second pressure roller (25) can rotate in U-type groove, and the second pressure roller (25) is supported on the second cam (12).

3. binding apparatus as claimed in claim 2, which is characterized in that further include supporting rack (8), the main shaft (1) is mounted on On supporting rack (8), it is logical that the third passed through for the first supporting member (21) and the second supporting member (22) is provided on support frame as described above (8) Hole；

It is arranged with the first spring (26), position on the first supporting member (21) between supporting rack (8) and the first U-shaped part (213) It is also arranged with the first spring (26) on the second supporting member (22) between supporting rack (8) and the second U-shaped part (223).

4. binding apparatus as described in claim 1, which is characterized in that supporting rod (31) top is hinged with a cross bar (34), supporting rod bottom end is connected with the U-shaped part of third (311), and third pressure roller is provided in the U-type groove of the U-shaped part of third (311) (35), third pressure roller (35) can rotate in U-type groove, and third pressure roller (35) is supported on third cam (13)；

First roller (32) is arranged in cross bar (34) one end, and the cross bar other end is suspended on second spring (36) end；Institute The second roller (33) is stated in a shaft.

5. binding apparatus as described in claim 1, which is characterized in that the strapping clamp system, strapping strainer, Main shaft (1), the first cam (11), the second cam (12) and third cam (12) are mounted in shell (5)；

Be provided with above the shell (5) carry object to be tied up hold object storehouse (6), the shell (5) it is internal with hold object storehouse (6) Perforation, the size for holding object storehouse (6) object to be tied up and hold to be reserved with the channel passed through for strapping (4) between object storehouse (61)。

6. binding apparatus as claimed in claim 5, which is characterized in that it is described hold object storehouse (6) bottom and be provided with to place wait tying up The isolation board (7) of object, first supporting member (21) and the second supporting member (22) setting are immediately below isolation board (7)；

Be provided with L-type plate (71) on the bottom surface both ends of the isolation board (7), one end of the L-type plate (71) be fixed on every From on plate, the gap (72) passed through for strapping is formed between the other end and isolation board (7) of L-type plate.

7. binding apparatus as claimed in claim 6, which is characterized in that be additionally provided with protrusion on the bottom surface of the isolation board (7) (73), it is provided on the cutting member (23) of the protrusion lower section and raised (73) the matched groove (231).

8. binding apparatus as claimed in claim 7, which is characterized in that described protrusion (73) bottom is provided with sensing device, ties Band (4) when touching raised bottom the sensing device can send out signal to control unit, control unit controls strapping Strainer carries out tensioning operation.

9. binding apparatus as claimed in claim 5, which is characterized in that outstanding by third spring (37) at the top of the shell (5) The tensioning switch (38) for controlling the second roller (33) rotation is hung with, can be squeezed when the tensile force of strapping (4) reaches a timing Tensioning switch (38).

10. binding apparatus as described in claim 1, which is characterized in that further include storage tape drum (9), store up the band outlet of tape drum (91) it is located near supporting rod (31), the second through-hole (312) passed through for strapping (4) is provided on the supporting rod (31).