JPH10152108A - Control method of fastening device for portable motor-driven binding band - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a binding work while keeping a start condition in an electric current non-conduction mode and repeatedly carry out the moving cycle in an electric current conduction mode, by manipulating a push button attached to the handle of a housing as the first switch to change over the mode. SOLUTION: The first and the second switches S1, S2 are provided to control the electric current conduction to a motor 6. Since the switch S1 is attached to the root of the handle 110 of a housing 100, when holding the handle, the switch can be put on and a current conduction mode and a current non- conduction mode can be changed over to each other. The switch S2 is turned to the current conduction mode when the rotary member 62 is in a specified position of the rotary path and to the current nonconduction mode when it is in other positions different from the specified position, by the changeover control switch. The electric motor 6 is assembled in a sequence control circuit together with the first and second switches S1, S2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for an electric binding band tightening device used for binding and binding wires such as harnesses with a binding band, in particular, a portable type.

[0002]

2. Description of the Related Art Conventionally, a stationary type binding band tightening device used for bundling wires such as a harness has been known.

[0003]

The stationary type electric tying band tightening device can perform the tying work only at the installation place. However, the place where the work of bundling wires such as harnesses is performed is not always a specific fixed place, and is performed at various work sites.

Although a portable tying band tightening device that can be easily carried has been proposed, a conventional portable tying band tightening device is a manual type, and a large amount of labor is required to perform many bundling operations. There was a problem of becoming.

The inventor of the present invention has conducted intensive studies and as a result, has found that a portable binding band tightening device which can be operated with an electric motor as a drive source, while being a portable binding band tightening device which can be easily carried. Successfully developed.

The present invention has been made in order to improve the usability of such a portable electric tying band tightening device. The hand is released from the manual changeover switch and the manual changeover switch is held in the non-energizing mode. Control method of a portable electric tying band tightening device capable of performing a tying operation adapted to a worker's feeling by always keeping a mechanism part of the device in a predetermined start state during the operation. The purpose is to provide.

Another object of the present invention is to provide a control method of a portable electric binding band tightening device in which the operation cycle of the mechanism is repeated while the manual changeover switch is kept in the energizing mode. With the goal.

[0008]

A portable electric binding band tightening apparatus to which the control method according to the present invention is applied has the following configuration. That is,

[0009] The cable is moved back and forth between a front position and a rear position separated by a predetermined distance from the front position, and holds the binding band when retreating from the front position to the rear position. A band holder for releasing the holding state of the binding band when the band holder is advanced to a position, and a reciprocation for moving the band holder forward and backward between the front position and the rear position with the band holder attached. A movable push-pull mechanism, and a tension load detection mechanism that detects that a tensile load in a forward direction of a predetermined magnitude is applied to the band holder in a process of retreating the band holder holding the binding band,
A band cutting mechanism for cutting the binding band held by the band holder at a position forward of the band holder when the tensile load detecting mechanism detects the tensile load; an electric motor; and an electric motor. A first switch and a second switch for controlling an energization state of the electric motor, and a motion conversion for converting a rotational motion of a rotary output shaft of the electric motor into a forward motion of the push-pull mechanism to retract the band holder. A mechanism and a first return mechanism for moving the band-holding tool forward by retracting the band-holding tool after the push-pull mechanism moves forward to retreat the band-holding tool to the rear position are grasped by hand. The first switch is housed in a housing having a handle portion to be held and a body portion extending forward from the handle portion, and the first switch is manually switched between an energized mode and a non-energized mode by manual control. A rotary member, which is formed by a switch and rotates one rotation in synchronism with the movement of the band holder when the band holder performs a reciprocating movement of one cycle, is connected to the movement conversion mechanism. The energizing mode is set when the rotating member is located at a fixed position in the rotation path, and the non-energizing mode is set when the rotating member is positioned at a position other than the fixed position in the rotating path. It is formed by a changeover switch that is changeover controlled.

In the portable electric tying band tightening device having such a configuration, it is possible to adopt a configuration in which the first switch is a push button switch attached to a handle of the housing. In this case, the mode can be switched by operating the push button of the first switch with the finger of the hand gripping the handle of the housing, thereby improving the usability.

In the portable electric binding band tightening device, the motion conversion mechanism includes a first bevel gear attached to a rotary output shaft of the electric motor, and a second bevel gear meshed with the first bevel gear. A swinging lever having a base end rotatably attached to the rotating shaft of the second bevel gear and a free end connected to a rear end of the retractable member; and a rotating lever fixed to the rotating shaft of the rotating member. A kick piece, a receiving piece fixed to the base end of the rocking lever and kicked by the kick piece when the kick piece rotates, and rocked by a certain angle from an initial position; And a second return mechanism for returning the receiving piece that has been kicked and rocked by the above to the initial position.

In this way, the configuration of the motion conversion mechanism is simplified and the size can be easily reduced, so that the device can be easily reduced in size and weight. That improves usability.

[0013] In the control method according to the present invention, in the portable electric binding band tightening device as described above, when the first switch is held in the non-energized mode and the second switch is held in the energized mode. When the power supply to the electric motor is interrupted and the electric motor is stopped, and when both the first switch and the second switch are held in the power supply mode, the electric motor is supplied with power and the electric motor is stopped. And when both the first switch and the second switch are held in the non-energized mode, and
When the first switch is held in the energized mode and the second switch is held in the non-energized mode, the state of energization of the electric motor is maintained until the rotating member reaches the home position. That is, the motor is rotated.

The operation of the control method of the portable electric binding band tightening device according to the present invention will be clarified by the embodiments described below.

[0015]

1 is an explanatory view schematically showing the internal structure of a portable electric binding band tightening device to which the control method of the present invention is applied. 2, 3 and 4
FIG. 4 is a partial cross-sectional view showing a main part of an internal structure of the device together with its operation. 5 is a partially omitted side view of the motion conversion mechanism 7, FIG. 6 is a partially omitted cross-sectional view of the motion conversion mechanism 7,
FIG. 7 is a sectional view taken along line VII-VII of FIG. 2, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

As shown in FIG. 1, the portable electric binding band tightening device includes a band holder 1, a push / pull mechanism 2 to which the band holder 1 is attached, and a tensile load detecting mechanism (FIG. 1). ), A band cutting mechanism 5, an electric motor 6, and first and second two switches S 1, S 1 for controlling an energized state of the electric motor 6.
2, a motion conversion mechanism 7, and a first return mechanism 8 for advancing the band holder 1, and these mechanisms are respectively provided with a grip portion 110 and a grip portion 110 for gripping with hands. Part 1
It is accommodated in a housing 100 having a body part 120 extending forward from the body 10.

Next, each of the above mechanisms will be specifically described.

The push-pull mechanism 2 includes a first rod 21 and a second rod 21.
It has a rod 25 and a third rod 41.

As can be seen from FIGS. 2 to 4 and FIG.
The rod 25 is an inverted U-shaped bracket integrally provided with an upper plate portion 26 and a pair of side plate portions 27, 27 suspended from both sides of the upper plate portion 26. Support pins 28,
29, the rollers 28a and 29a fitted to both ends of the support pins 28 and 29
00 is slidably or rollably fitted in a guide groove 121 extending in the front-rear direction provided on a side wall of the body portion 120 of the main body. A connecting piece 30 protrudes rearward from a rear end of the second rod 25, and protruding pieces 37, 37 protrude downward from a lower end of the second rod 25. A pair of front and rear brackets 32, 33 are provided on the upper plate portion 26. A screw shaft 34 is rotatably mounted on these brackets 32, 33 so as to be rotatable and not movable in the forward and backward directions. Is provided with an operating portion 35 extending rearward of the rear bracket 33.
Is a through-hole 12 provided at the rear end of the body 120.
2 (see FIG. 1) can be rotated by a rotating tool (not shown) inserted. Screw shaft 3
4 is screwed with a screw hole provided in the scale plate 36. Therefore, when the screw shaft 34 is rotated in the forward or reverse direction, the scale plate 36 moves forward or backward according to the amount of rotation. The scale (not shown) provided on the upper surface of the scale plate 36 can be seen through the window 123 except for the body 120.

The first rod 21 is formed of a member longer in the front-rear direction than the second rod 25. This first
The rod 21 is formed of a pair of side plates 27, 2 of the second rod 25.
7 and extend forward from between them. Guide holes 22 and 23, which are long holes in the front-rear direction formed at two places before and after the first rod 21,
The support pins 28 and 29 are individually inserted, and the rollers 28b and 29b fitted to the support pins 28 and 29 are slidably or rollably fitted into the guide holes 22 and 23. Have been. Therefore, the first rod 21 is movable back and forth with respect to the second rod 25, and the range of movement is restricted by the length of the guide holes 22 and 23. In addition, the forward and backward movement of the first rod 21 is also guided by the fact that the roller 24 provided near the front end of the first rod 21 is fitted in the guide groove 121.

The third rod 41 is a main part 4 extending in the front-rear direction.
2 and a rising portion 43 connected to the rear end of the main portion 42
And a downwardly projecting piece 44 connected to the front end of the main part 42.
And a pair of plate pieces having the following. These plate pieces are arranged outside the second rod 25 therebetween, and the pair of plate pieces are joined by a spring receiving piece 45 laid between upper ends of the rising portions 43. ing. The intermediate portion of the main portion 42 of the third rod 41 is overlapped with the protruding piece 37 of the second rod 25, and a support pin 46 is inserted through the overlapping portion as shown in FIG. . Therefore, the third rod 41 can swing vertically with respect to the second rod 25 about the support pin 46.

The band holder 1 will be described with reference to FIGS. The band holder 1 is connected to the first rod 21.
A claw 13 is attached to the front end of the first member via a mounting pin 12 so as to be vertically swingable.
A receiving piece 14 provided at the front end of the rod 21 and the first rod 2
And a spring 15 which is attached to the front end portion 1 and constantly urges the claw piece 13 upward. In addition, nail piece 1
3 is provided with serrated engagement teeth 13a. On the other hand, a stopper 124 is provided at the front end of the body 120 of the housing 100. This stopper 124
When the claw 13 is in contact with the stopper 124 as shown in FIG. Acts to open the interval. Therefore,
When the claw 13 is separated from the stopper 124 as shown in FIGS. 3 and 4, the claw 13 swings upward by the force of the spring 15 to close the gap with the receiving piece 14.

The band cutting mechanism 5 includes a rod 51 elongated in the front-rear direction, and a cutting blade 52 attached to the front end of the rod 51. The intermediate portion of the rod 51 in the front-rear direction is swingably supported by a support pin 53 supported by the body 120 of the housing 100. And
When the rod 51 swings forward about the support pin 53, the cutting blade 52 is lifted by the rod 51 along the guide groove 125 provided at the front end of the body 120. A long hole 54 long in the front-rear direction is formed at the rear end of the rod 51, and a pin 47 provided on the protruding piece 44 of the third rod 41 is inserted into the long hole 54. When the pin 47 is lowered at the rear position of the long hole 54, the rear end of the rod 51 is pushed down by the pin 47, and the rod 51 swings forward with the support pin 53. (See FIG. 4).

The tension load detecting mechanism 55 is provided on the lower edge of the first rod 21 in an arc shape and is provided in the main portion 42 of the third rod 41 and can be fitted into and removed from the concave 56. It is formed by an engagement / disengagement roller 57 and a spring body 58 formed of a coil spring which is fitted on the screw shaft 34 and interposed between the scale plate 36 and the spring receiving piece 45.
The spring 58 constantly urges the spring receiving piece 45 rearward. Therefore, the rising portion 43 of the third rod 43 is also constantly elastically urged rearward. Therefore, the third rod 43
As a result, the engaging roller 57 is constantly urged in the clockwise direction around the support pin 46, whereby the engaging / disengaging roller 57 is always urged in the direction in which the concave portion 56 is fitted. Since the engagement / disengagement roller 57 is constantly urged in the direction in which the engagement / disengagement roller 57 is fitted into the recess 56, the second rod 25 is moved forward or inward when the engagement / disengagement roller 57 is fitted in the recess 56. When the third rod 41 is forcibly moved backward, the third rod 41 is moved forward or backward together with the second rod 25. Then, in the process of forcibly moving the second rod 25 backward, that is, in the process of retreating the band holder 1, a tensile load is applied to the band holder 1 in the forward direction, and the tensile load is reduced. When the first rod 21 reaches a certain size, the second rod 25 and the third rod 41 connected via the support pin 46 are forcibly moved backward while the first rod 21 stays at that position. Therefore, the engagement / disengagement roller 57 pushes down the main part 42 of the third rod 41 downwardly in order to separate from the recess 56, and the third rod 41 is
The pivot roller 6 pivots counterclockwise around the spring 6 against the bias of the spring body 58, and the engagement / disengagement roller 57 is separated from the concave portion 56. In this way, it is detected that a predetermined amount of tensile load in the forward direction is applied to the band holder 1. The magnitude of the load detected by the tensile load detecting mechanism 55 is determined by inserting a rotary tool (not shown) from the through hole 122 (see FIG. 1) and rotating the operation unit 35 in the forward or reverse direction. This can be adjusted by moving the scale plate 36 back and forth, thereby changing the length of the spring body 58.

As shown in FIGS. 5 and 6, the movement converting mechanism 7 converts the rotational movement of the rotary output shaft 61 of the electric motor 6 into the forward movement of the push-pull mechanism 2 to move the band holder 1 backward. It has the function of causing The motion conversion mechanism 7 includes a first bevel gear 71 attached to a rotation output shaft 61 of the electric motor 6, and a second bevel gear 72 meshing with the first bevel gear 71.
The base end of the second bevel gear 72 is pivotally attached to the rotating shaft 73 and the free end is connected to the connecting piece 30 provided on the second rod 21 of the push-pull mechanism 2. And a swing lever 74. The swinging lever 74 has a long hole 75 at its free end, and the long hole 75 has an engaging pin provided on the connecting piece 30 as shown in FIGS. 2 to 4 and 6. 76 is fitted, the second
It is connected to the rear end of the rod 21. Further, a gear portion 77 is coaxially provided on the rotating shaft 73 of the second bevel gear 72 as shown in FIG. 6, and the driven gear 78 shown in FIG. A kick piece 79 and a dog rotating member 62 are fixed coaxially with the driven gear 78. The motion conversion mechanism 7 has the kick piece 79 and a receiving piece 79a provided at the base end of the swing lever 74 as a counterpart of the kick piece 79. When rotating, the receiving piece 79a is kicked by the kicking piece 79 and swings by a certain angle from an initial position described later.

The first return mechanism 8 is a spring body composed of a tension coil spring which is stretched over the attachment 126 attached to the support pin 53 supported by the body 120 of the housing 100 and the support pin 46. 81. As shown in FIG. 7, the spring bodies 81 are provided on both sides of the push-pull mechanism 2 with the second rod 25 and the like therebetween. The spring body 81 constantly urges the second rod 25 and the third rod 41 forward, that is, in the backward movement direction, via the support pins 46. Therefore, the kick piece 79 of the motion conversion mechanism 7 described above.
Kicks the receiving piece 79a and swings the receiving piece 79a by a certain angle from the initial position (that is, after the band holder 1 has retreated to the rear position), and the kicking piece 79 gets over the receiving piece 79a. While rotating, the second rod 25 and the third rod 41 are moved by the force of the spring 81 forming the first return mechanism 8.
Is moved back forward, and at the same time, the recess 56
The first rod 21 is pushed by the engagement / disengagement roller 57 engaged with the first member and moves forward.

The motion conversion mechanism 7 described above further includes a kick piece 7.
A second return mechanism is provided for returning the receiving piece 79a, which has been kicked and swung by 9 to the initial position. The second return mechanism is also used by the spring body 81 forming the first return mechanism described above. That is, the kick piece 79 is
The second rod 25 is rotated by the spring 8
As the second lever 25 is moved backward, the swing lever 74 swings forward, and the swinging lever 74 swings forward by the kick piece 79. The receiving piece 79a that has been kicked and rocked also returns to the initial position.

Next, first and second two switches S1 and S1 for controlling the energization state of the electric motor 6 are described.
2, the first switch S1 is attached to the base of the handle 110 of the housing 100 as shown in FIG. If the first switch S1 is attached to this position,
When the grip portion 110 is gripped by a hand, the first switch S1 can be pressed with the forefinger of the hand,
The operation is the same as the operation of triggering a short gun, so that the operation is good. Also, the first switch S1 is
It is formed by a push button switch which is a kind of a manual changeover switch in which switching between an energization mode and a non-energization mode is manually controlled. On the other hand, the second switch S2 is set to the energization mode when the rotary member 62 formed of a dog is located at a fixed position on the rotation path, and the rotation member 62 is set to a position other than the fixed position on the rotation path. Is formed by a change-over switch that is controlled to switch to the non-energization mode when it is located at the position. Specifically, in addition to the illustrated limit switch, a proximity switch or a photoelectric switch can be used. Here, when the band holder 1 reciprocates one cycle, that is, when the push / pull mechanism 2 performs the forward movement and the backward movement once each, the rotating member 62 makes one rotation in synchronization with the rotation. It is supposed to. This point can be easily achieved by appropriately determining the number of teeth of the gear portion 77 and the number of teeth of the driven gear 78 described above.

Next, the electric motor 6 is connected to the first switch S1.
Together with the second switch S2 and a known sequence control circuit (not shown). This sequence control circuit operates as shown in (a), (b), and (c) below. (A) When the first switch S1 is held in the non-conduction mode and
When the switch S2 is held in the energization mode,
The energization of the electric motor 6 is interrupted, and the electric motor 6 stops. (B) When both the first switch S1 and the second switch S2 are kept in the energization mode, the electric motor 6 is energized and the electric motor 6 rotates. (C) When both the first switch S1 and the second switch S2 are held in the non-energized mode, and when the first switch S1 is held in the energized mode and the second switch S2 is held in the non-energized mode. In some cases, the state of energization of the electric motor 6 is held by itself, and the electric motor 6 is rotated until the rotating member 62 reaches the home position.

In the portable electric binding band tightening device described above, the fixed position of the rotating member 62 is set by pushing the operating piece 201 of the second switch S2 as shown in FIGS. Is the position where the power supply mode is set. When the rotary member 62 is separated from the operation piece 201, the operation piece 201 of the second switch S2 returns to the non-energized mode.

In the portable electric tying band tightening apparatus described above, when the second switch S2 is held in the energizing mode and the first switch S1 is held in the non-energizing mode as shown in FIG. The power supply to the motor 6 is cut off and the electric motor 6 is stopped. At this time, as shown in FIG. 2, the kick piece 79 faces the receiving piece 79a on the near side in the rotation direction. For this reason, the second rod 25, the third rod 41, and the first rod 21 of the push / pull mechanism 2 are pulled forward by the force of the spring body 81 of the first return mechanism 8, and return forward.
The band holder 1 is located at the front position, and the engagement / disengagement roller 57 of the tension load detection mechanism 55
Is fitted. In addition, the band holder 1 is located at the front position, and the claw 13 of the band holder 1 contacts the stopper 124 to increase the interval with the receiving piece 14. The cutting blade 52 is located at the lower position. This state is a start state.

In the start state, the binding band B is inserted into the groove 127 of the housing 100 as shown in FIG. As shown in FIG. 2, the binding band B has a head 1 at the end.
The head 120 has a head 120 with a looped binding band B wound around a wire C that is bundled with a harness or the like.

When the first switch S1 is pressed to enter the energizing mode, both the first switch S1 and the second switch S2 are maintained in the energizing mode, so that the electric motor 6 is energized and the electric motor 6 rotates. The rotation of the rotation output shaft 61 is transmitted to the kick piece 79 via the first bevel gear 71, the second bevel gear 72, the gear portion 77, and the driven gear 78, and the kick piece 79 and the rotating member 62 are rotated in the counterclockwise direction. Rotate. When the rotating member 62 rotates, the rotating member 62 is separated from the operation piece 201 of the second switch S2, and the second switch S2 is switched to the non-energized mode. At this time, the finger is released from the first switch S1, and the first switch S1 is set to the non-energizing mode, or the first switch S1 is kept pressed by the finger to keep the first switch S1 in the energizing mode. However, the state of energization of the electric motor 6 is maintained by itself, and the electric motor 6 is rotated until the rotating member 62 reaches the home position.

When the kick piece 79 rotates in the counterclockwise direction and starts to kick the receiving piece 79a, the swinging of the receiving piece 79a about the rotating shaft 73 is started, and at the same time, the swing lever 74 is rotated clockwise. Start rocking in the direction. Along with this, the second rod 25 is pulled backward by the swing lever 74, and the third rod 41 and the first rod 21 are also pulled backward and start going forward, so that the band holder 1 is moved from its front position. The claw 13 is separated from the stopper 124 as it is retracted, and the binding band B is clamped by the force of the spring 15 in cooperation with the claw 13 receiving piece 14, and the binding band B is held by the band holder. It is held at 1 and pulled backward. At this time, the head 120 of the binding band B is pulled backward by the binding band B and pressed against the front end surface 128 of the housing 1.
Therefore, the first rod 21, the second rod 25, and the third rod 4
When the push / pull mechanism 2, which is constituted by 1, moves forward further, the band holder 1 retreats while holding the binding band B, and the binding band B is pulled backward from the head 120 and tightened. When the kick piece 79 gets over the receiving piece 79a, the band holder 1 has reached the subsequent position.

When the tightening of the binding band B has not been completed yet even when the kick piece 79 rotates over the receiving piece 79a, the disengagement roller 57 of the tensile load detecting mechanism 55
8, the spring body 81 serving as the first return mechanism 8 and the second return mechanism at the time when the kick piece 79 gets over the receiving piece 79 a. The second rod 25, the third rod 41, the first rod
The rod 21 is pulled back and moves forward, and the band holder 1 returns from the rear position to the front position. At the same time, the swing lever 74 returns to the original position. When the band holder 1 moves forward toward the front position, the claw pieces 13 slide on the surface of the binding band B because the claw pieces 13 are serrated. Further, the rotation member 62 makes one rotation to switch the second switch S2 to the energization mode. When the second switch S2 is switched to the energized mode in this way, if the first switch S1 is kept in the energized mode, the energization of the electric motor 6 is continued and the electric motor 6 rotates. Continue, the backward movement of the second rod 25, the third rod 41, and the first rod 21 of the push / pull mechanism 2 and the band holder 1
Are held back while holding the binding band B.

As shown in FIG. 3, in the process of forcibly moving the second rod 25 backward (ie, in the process of retreating the band holder 1), the tightening of the binding band B is completed. At times, a tensile load in the forward direction is applied to the band holder 1. When the tensile load reaches a certain level, the tensile load at that time is detected by the tensile load detecting mechanism 55. That is, as shown in FIG.
Is stopped at that position, while the second rod 25 and the third rod 41 connected via the support pin 46 are forcibly moved backward, so that the engagement / disengagement roller 57 will be separated from the concave portion 56. As a result, the main part 42 of the third rod 41 is pushed down, and the third rod 41 is
8 swings counterclockwise against the bias of 8, and the engagement / disengagement roller 57 separates from the concave portion 56. Thus, the engagement / disengagement roller 57
Is released from the concave portion 56, the engaging / disengaging roller 57 is moved to the first position.
The third rod 41 shifts to the lower edge of the rod 21 and the support pin 46
, The pin 47 engages with the long hole 54 of the rod 51, and the rod 51 is supported by the support pin 53.
Swing down around the center. As a result, the front end of the rod 51 is swung upward about the support pin 53, and the cutting blade 52 is lifted to cut the binding band B at a position in front of the stopper 124.

After the tightening of the binding band B is completed and the binding band B is cut, when the finger is released from the first switch S1 and the first switch S1 is switched to the non-energizing mode, the rotating member 62 is turned off. When it is in the home position, the first
The switch S1 is kept in the non-conduction mode and the second switch S
2 is kept in the energization mode, the energization to the electric motor 6 is cut off, and the electric motor 6 stops. Therefore, the next binding operation is started from the start state in FIG.

After the tightening of the binding band B is completed and the binding band B is cut, when the user releases his / her finger from the first switch S1 and switches the first switch S1 to the non-energizing mode, the rotating member When the switch 62 is located at a position other than the home position, both the first switch S1 and the second switch S2 are held in the non-energized mode, so that the energized state of the electric motor 6 is held by itself. The electric motor 6 is rotated until the rotating member 62 reaches the home position,
When the rotating member 62 reaches the home position, the first switch S1 is held in the non-energizing mode and the second switch S2 is held in the energizing mode, so that the power to the electric motor 6 is cut off. The electric motor 6 stops. Therefore, also in this case, the next binding operation is started from the start state in FIG.

[0039]

According to the present invention, since the binding operation can be performed by using the electric motor as a driving source, the labor required for the operation is greatly reduced as compared with the case where a manual binding band tightening device is used. .

Further, at the start of the binding operation, the mechanism of the apparatus is always kept in a predetermined start state, so that the binding operation suitable for the operator's feeling can be performed.

Further, since the operation cycle of the above-mentioned mechanism is repeated only by holding the manual changeover switch in the energizing mode, a reliable binding operation can be performed even if the binding band is long.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing an internal structure of a portable electric binding band tightening device to which a control method of the present invention is applied.

FIG. 2 is a partial cross-sectional view showing a main part of an internal structure of the apparatus in a start state together with an operation thereof.

FIG. 3 is a partial cross-sectional view showing a main part of an internal structure of the apparatus when a band holder of the apparatus is located at a rear position together with an operation thereof.

FIG. 4 is a partial cross-sectional view showing a main part of an internal structure together with an operation of the band cutting mechanism of the apparatus when the band cutting mechanism is operating.

FIG. 5 is a partially omitted side view of the motion conversion mechanism.

FIG. 6 is a partially omitted sectional view of a motion conversion mechanism.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 2;

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 2;

[Explanation of symbols]

 B Binding band S1 First switch S2 Second switch 1 Band holder 2 Push / pull mechanism 5 Band cutting mechanism 6 Electric motor 7 Motion conversion mechanism 8 First return mechanism 55 Tensile load detection mechanism 79 Rotating member 71 First bevel gear 72 First 2 bevel gear 73 rotating shaft of second bevel gear 74 swing lever 79 kick piece 79a receiving piece 81 spring body (first return mechanism, second return mechanism) 100 housing 110 handle section 120 body section

Claims (3)

[Claims] 1. A back and forth movement between a front position and a rear position separated by a predetermined distance from the front position to hold a binding band when retreating from the front position to the rear position; A band holder for releasing the holding state of the binding band when moving forward to the front position, and a band holder attached to the band holder for moving the band holder back and forth between the front position and the rear position. Reciprocating push-pull mechanism, and a tensile load detecting mechanism for detecting that a tensile load of a predetermined magnitude in the forward direction is applied to the band holder during the retreating process of the band holder holding the binding band. A band cutting mechanism for cutting the binding band held by the band holder at a position forward of the band holder when the tensile load detection mechanism detects the tensile load; and an electric motor. Motor, a first and a second switch for controlling an energized state of the electric motor, and a band for converting the rotational movement of the rotary output shaft of the electric motor into forward movement of the push-pull mechanism. A movement conversion mechanism for retracting the holder, and a first return for moving the band holder forward by retracting the band holder to the rear position after the push-pull mechanism moves forward and backward. The mechanism is
The first switch is housed in a housing having a handle portion for gripping by hand and a body portion extending forward from the handle portion, and the first switch is manually switched between an energized mode and a non-energized mode manually. A rotation member formed by a switch, and a rotating member that makes one rotation in synchronization with the movement of the band holder when the band holder performs one cycle of reciprocating movement is interlockedly connected to the movement conversion mechanism. The energizing mode is set when the rotating member is located at a fixed position in the rotation path, and the non-energizing mode is set when the rotating member is positioned at a position other than the fixed position in the rotating path. In a portable electric binding band tightening device formed by a changeover switch that is controlled to be switched, the first switch is held in a non-conduction mode and the second switch is set in a conduction mode. When held, the electric motor is stopped by interrupting the power supply to the electric motor,
When both the first switch and the second switch are held in the energizing mode, the electric motor is energized to rotate the electric motor, and both the first switch and the second switch are de-energized. When the first switch is held in the energizing mode and the second switch is held in the non-energized mode, the rotating state is maintained by holding the current to the electric motor. A portable electric binding band tightening device, wherein the electric motor is rotated until the electric motor reaches the home position. 2. The method according to claim 1, wherein the first switch is a push button switch mounted on a handle of the housing. 3. The bevel gear mounted on a rotation output shaft of the electric motor, a second bevel gear meshing with the first bevel gear, and a base end portion of the second bevel gear. A swing lever having a free end rotatably attached to the rotating shaft of the push-pull mechanism connected to the rear end of the push-pull mechanism, a kick piece fixed coaxially to the rotating member, and the base of the swing lever. A receiving piece fixed to an end portion and kicked by the kick piece when the kick piece rotates and swinging by a certain angle from an initial position; and a receiving piece kicked and swinged by the kick piece. A second return mechanism for returning to an initial position.
Or the control method of the portable electric binding band tightening apparatus of Claim 2.