JP3655954B2 - Portable electric binding band tightening device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable device among electric binding band tightening devices used when a wire material such as an electric wire is bound and bound by a binding band.
[0002]
[Prior art]
Conventionally, a stationary device has been known as an electric binding band tightening device used for bundling wires such as electric wires.
[0003]
[Problems to be solved by the invention]
The stationary electric binding band tightening device can perform the binding operation only at the installation location of the device. However, the place where the work of bundling wires is not necessarily a specific fixed place, and the work of bundling electric wires and other wires using bundling bands is performed at various work sites. In addition, in the stationary type electric binding band tightening device, it is necessary to bring the wire to the tightening device, but it is convenient to bring the electric binding band tightening device to the wire and bind it. There are many cases.
[0004]
Therefore, it is considered that it is effective to make the electric binding band tightening device portable so that it can be miniaturized and carried. In a portable electric binding band tightening device, it is beneficial to obtain an electric motor as a power source for a series of steps from the start of binding to cutting an excess portion of the binding band.
[0005]
By the way, in a portable electric binding band tightening device using an electric motor as a power source, the function of tightening the binding band is assigned to a tightening roller having an uneven outer peripheral surface and a presser roller that presses the binding band against the tightening roller. In this case, the binding band tightening force depends on the tensile force applied to the binding band by the tightening roller, and the magnitude of the tensile force depends on the strength of the binding band by the cooperating force of the tightening roller and the pressing roller.
[0006]
On the other hand, the binding band is not uniform in thickness, and if the binding band is made of synthetic resin, it is compressed to some extent by the repulsive pressure between the tightening roller and the pressing roller. In order to bind, it is required that the tightening roller and the pressing roller press the binding band with an appropriate force during tightening.
[0007]
The present invention has been made under the circumstances described above, and when the electric binding band tightening device is portable using an electric motor as a drive source, the binding band reed pressure by the tightening roller and the presser roller during tightening Can be adjusted up and down, and it is portable so that it can be securely bound even to relatively flexible binding bands such as binding bands with different thicknesses or binding bands made of synthetic resin An object is to provide an electric binding band tightening device.
[0008]
[Means for Solving the Problems]
In the portable electric binding band tightening device according to the present invention, a tightening roller for feeding the binding band in the tightening direction and a presser roller for pressing the binding band against the tightening roller are distributed on both sides of the groove portion into which the binding band is inserted. The tensioning roller is interlocked and connected to the rotating shaft of the electric motor via a rotation transmission mechanism, a sliding body is provided at the base end of the lever having a swing fulcrum at the intermediate portion, and the presser roller at the tip It is supported in a freely rotating manner, and the operating part for projecting the presser roller to the binding band pressing position by pushing the sliding member of the lever and swinging the lever, and the presser roller retracting from the binding band pressing position to the standby position. A rotating cam having a non-operating portion for allowing is coupled to the rotation transmission mechanism, and the tightening roller and a presser roller in a standby position. And a gap adjustment mechanism for adjusting the distance increases or decreases, is that.
[0009]
In the portable electric binding band tightening device configured as described above, the rotation of the electric motor is transmitted to the tightening roller and the rotating cam via the rotation transmission mechanism.
[0010]
When the rotating cam is rotated and the operating portion pushes the sliding body to swing the lever, the presser roller protrudes to the binding band pressing position. Therefore, the binding band inserted in the groove between the tightening roller and the pressing roller is sent in the tightening direction by the tightening roller, and the tightening operation is performed. Further, when the non-operating portion of the rotating cam corresponds to the sliding body, the presser roller moves backward to the standby position.
[0011]
When the distance between the tightening roller and the holding roller at the standby position is increased by the distance adjusting mechanism, the reed pressure of the binding band due to the cooperation of the tightening roller and the pressing roller is weakened. In addition, by using such a configuration, it is possible to use a thick binding band.
[0012]
On the other hand, when the distance between the tightening roller and the pressing roller at the standby position is decreased by the distance adjusting mechanism, the binding band reed pressure due to the cooperation of the tightening roller and the pressing roller is increased. In addition, by using such a configuration, it is possible to use a binding band having a small thickness.
[0013]
The sliding body can be formed by a screw shaft that is screwed into a screw hole formed at the base end portion of the lever. In this case, a distance adjusting mechanism is formed by a screwing position between the screw shaft and the screw hole. Is done. In this interval adjusting mechanism, the interval between the tightening roller and the presser roller at the standby position increases by rotating the screw shaft in the loosening direction, and the tightening roller and the presser roller at the standby position by rotating the screw shaft in the tightening direction. The interval of decreases.
[0014]
A headed bolt can be used for the screw shaft, and a sliding portion for the operating portion of the rotating cam can be provided at the tip of the shaft portion of the headed bolt. And by interposing a locking member between the head of the headed bolt and the base end of the lever, the distance between the tightening bolt and the presser bolt changes due to vibration or impact generated during the binding operation. The situation can be avoided. The locking member can be used elastic body.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 is a perspective view schematically showing a main part mechanism of a portable electric binding band tightening device according to the present invention, FIGS. 2 to 4 are operation explanatory views, FIG. 5 is an operation explanatory view of a distance adjusting mechanism 57, FIG. Is an explanatory view showing the second rotating cam and the second lever, FIG. 7 is a side view showing the appearance of the portable electric binding band tightening device, FIG. 8 is an operation explanatory view of the tightening roller 2 and the presser roller 21, and FIGS. FIG. 12 is an explanatory diagram of each step of the tightening operation.
[0016]
The principal part mechanism will be described with reference to FIG. This portable electric binding band tightening device uses the electric motor 1 as a power source, and the switch circuit (not shown) of the electric motor 1 is connected and disconnected by the swinging movement of the kick piece 12 of the limit switch 11.
[0017]
The rotating shaft 13 of the electric motor 1 and the tightening roller 2 are interlocked and connected via a gear train 3. The gear train 3 includes a bevel gear 31 provided on the rotary shaft 13 of the electric motor 1 and a bevel gear 32 meshing therewith, an intermediate gear 33 formed of a spur gear provided coaxially with the bevel gear 32, and the intermediate gear 33 and tightening It has a plurality of intermediate gears 34 to 39 which are spur gears arranged between the roller 2 and a spur gear 40 provided coaxially and meshing with each other. In the illustrated gear train 3, the number of teeth of the intermediate gears 33 to 39, the bevel gears 31 and 32, and the spur gear 40 are mutually adjusted so that the rotation of the electric motor 1 is appropriately transmitted to the tightening roller 2. Has been.
[0018]
The first rotary cam 51 and the second rotary cam 56 are fixed to one of the intermediate gears 33 to 39 forming the gear train 3, in the illustrated example, the rotary shaft 41 to which the intermediate gear 36 is fixed. Yes. As clearly shown in FIG. 5, the first rotating cam 5 has a large-diameter operating portion 5a and a small-diameter non-operating portion 5b. As clearly shown in FIG. The two-rotation cam 6 has a protruding operation part 6a and a non-operation part 6b having a small diameter. 2 to 4, the operating portion 6a of the second rotating cam 6 is positioned forward of the non-operating portion 5b of the first rotating cam 5 by a predetermined angle in the rotational direction thereof. .
[0019]
In FIGS. 1 and 5, reference numeral 51 denotes a first lever, and a central portion (intermediate portion) of the first lever 51 is swingably supported by a support shaft 42 that rotatably supports the intermediate gear 38. The support location is the pivot point of the first lever 51. A first sliding body 52 is provided at the base end of the first lever 51. The first sliding body 52 is a screw shaft, specifically a headed bolt, screwed into a screw hole 53 formed in the base end portion of the first lever 51, and a first bolt is attached to the tip of the shaft portion of the headed bolt. A sliding portion 54 with respect to the operating portion 5 a of the one-rotation cam 5 is provided, and a locking member 56 is interposed between the head 55 of the headed bolt and the base end portion of the first lever 51. The locking member 56 is made of an elastic body . The locking member 56 has a function of preventing the first sliding body 52 made of a headed bolt from rotating with respect to the screw hole 53 due to vibration or impact. Further, the presser roller 21 is rotatably supported at the tip end portion of the first lever 51, and the presser roller 21 faces the tightening roller 2. A first spring body 59 made of a coil spring is provided between the distal end portion of the first lever 51 and the support 58, and the distal end portion of the first lever 51 is pulled by the first spring body 59. Therefore, the presser roller 21 is always urged in the backward direction.
[0020]
When the operating portion 5a of the first rotating cam 5 pushes the first sliding body 52 and the first lever 51 is swung against the urging force of the first spring body 59, the pressing roller 21 is tightened. It approaches 2 and protrudes to the binding band pressing position. When the non-operating portion 5 b of the first rotating cam 5 corresponds to the first sliding body 52, the pressing roller 21 moves in a direction away from the tightening roller 2 by the urging of the first spring body 59, and the standby position. Retreat to.
[0021]
A distance adjusting mechanism 57 is formed by a screwed portion between the screw shaft (head bolt) forming the first sliding body 52 and the screw hole 53. The distance adjusting mechanism 57 is used to increase or decrease the distance H (see FIG. 5) between the tightening roller 2 and the pressing roller 21 at the standby position. In the distance adjusting mechanism 57, the distance H can be increased by rotating the first sliding body 52, which is a screw shaft, in the loosening direction, and the distance H can be increased by rotating the first sliding body 52 in the tightening direction. Can be reduced.
[0022]
In FIGS. 1 and 6, reference numeral 61 denotes a second lever, and the central portion (intermediate portion) of the second lever 61 swings on the same support shaft 42 that forms the swing fulcrum of the first lever 51. It is supported so that it can move freely, and the supporting portion serves as the swinging fulcrum of the second lever 61. A second sliding body 62 is provided at the base end portion of the second lever 61. The second sliding body 62 is formed by projecting the base end portion of the second lever 61. A cutter 63 is connected to the tip of the second lever 61.
[0023]
When the operating portion 6a of the second rotating cam 6 pushes the second sliding body 62 and swings the second lever 61, the cutter 63 moves forward to the cutting position of the binding band (described later). Further, when the non-operating portion 6b of the second rotating cam 6 corresponds to the second sliding body 62, the cutter 63 can return to the standby position. A second spring body 69 made of a coil spring is provided between the distal end portion of the second lever 61 and the receiver 58, and the distal end portion of the second lever 61 is pulled by the second spring body 69. Therefore, the cutter 63 is always urged in the backward movement direction.
[0024]
A third rotating cam 7 is provided on a predetermined intermediate gear 34 of the gear train 3, and the kick piece 12 of the limit switch 11 is kicked by the third rotating cam 7. Here, the first rotating cam 5 and the second rotating cam 6 described above have operating portions 5a and 6a only at one place in the circumferential direction. Then, after the third rotating cam 7 makes one rotation and kicks the kick piece 12 of the limit switch 11, the first rotary cam 5 and the second rotary cam 6 are in a period until the kick piece 12 returns to the original position. Is configured to rotate once.
[0025]
As described above, the operating portion 6a of the second rotating cam 6 is positioned forward of the non-operating portion 5b of the first rotating cam 5 by a predetermined small angle in the rotational direction thereof, so Immediately before the corresponding part of the first rotating cam 5 with respect to the moving body 52 shifts from the operating part 5a to the non-operating part 5b, the corresponding part of the second rotating cam 6 with respect to the second sliding body 62 described later changes from the non-operating part 6b to the operating part. 6a (see FIG. 4).
[0026]
As shown in FIG. 7A, the housing 8 of this electric cable tie band tightening device has a shape similar to a short gun. That is, the housing 8 is integrally provided with a gripping portion 81, a barrel portion 82 that extends forward from the gripping portion 81, and a head portion 83 that is provided at the tip of the barrel portion 82. 2 to 4, the electric motor 1 is provided in the gripping portion 81, the gear train 3, the first lever 51, the second lever 61, and the like are provided in the body portion 82, and the head portion 83. The tightening roller 2 and the presser roller 21 are provided.
[0027]
As shown in FIGS. 7A and 7B, a groove portion 84 is provided on the upper portion of the head portion 83 of the housing 8 by vertically cutting the head portion 83. The groove portion 84 has a sufficient width for inserting the binding band, and is open on the side surface of the head portion 83.
[0028]
The tightening roller 2 and the presser roller 21 are disposed on both sides of the groove portion 84 in a distributed manner. As shown in FIGS. 2 to 4, the presser roller 21 is disposed in the lower space section S <b> 2 connected to the body section 82 among the upper and lower space sections S <b> 1 and S <b> 2 of the head section 83 defined by the groove section 84. The tightening rollers 2 are respectively provided in the upper space section S1 connected to the portion 82 via the lower space section S2. Further, as can be seen from FIG. 7A, the cutter 63 can reciprocate across the groove 84 at the front position of the tightening roller 2. The cutter 63 is guided by a guide groove 85 (see FIGS. 2 to 4) provided in the head portion 83 of the housing 8.
[0029]
As shown in FIG. 8, the tightening roller 2 has an outer peripheral surface that is an uneven surface by knurling. On the other hand, the presser roller 21 has a flat outer peripheral surface.
[0030]
Next, the operation will be described with reference to FIGS. 2 to 4 and FIGS.
[0031]
This portable electric binding band tightening device is operated by holding the gripping portion 81 of the housing 8 by hand. Then, when the push button 9 provided on the gripping portion 81 is pressed, the switch circuit of the electric motor 1 is connected and the electric motor 1 is started. When the kick piece 12 of the limit switch 12 is kicked by the third rotating cam 7, the switch circuit is separated and the electric motor 1 is stopped.
[0032]
FIG. 2 shows a start state. In this state, the kick piece 12 of the limit switch 12 is pushed by the third rotary cam 7, and the first sliding body 52 is a non-operating part of the first rotary cam 5. 5b, the second sliding body 62 corresponds to the non-operation portion 6b of the second rotating cam 6. Therefore, the presser roller 21 and the cutter 63 are standby positions. At this time, the binding band 100 is inserted into the groove 84 as shown in FIG. As shown in FIG. 1, the binding band 100 includes a head portion 110 at an end portion, and a bundled wire material 200 such as an electric wire is wound around the head portion 110 through the looped binding band 100.
[0033]
When the push button 9 is pressed to start the electric motor 1, the rotation of the electric motor 1 is transmitted to the tightening roller 2 through the gear train 3 and the tightening roller 2 rotates. The first rotating cam 5 and the second rotating cam 6 also rotate.
[0034]
As shown in FIG. 3, when the first rotating cam 5 rotates and the operation portion 5 a pushes the first sliding body 52, the first lever 51 swings and the presser roller 21 is bound as shown by an arrow b. Projects to the pressing position. Therefore, as shown in FIG. 10, the binding band 100 inserted in the groove portion 84 is pressed together by the tightening roller 2 and the pressing roller 21. Thereby, the binding band 100 is sent in the tightening direction as indicated by the arrow a by the tightening roller 2. When the binding band 100 is sent in the tightening direction, the binding band 100 that bundles the wires 200 is pulled toward the end surface 80 side of the housing 8, and the head 110 hits the end surface 80 of the housing as shown in FIG. However, the feeding of the binding band 100 is continued. Therefore, as shown in FIG. 11, the binding band 100 is pulled out from the head 110 and tightened. Thus, after the tightening is performed with a sufficiently strong force, the binding band 100 is not fed even if the tightening roller 2 rotates, and the tightening roller 2 is idled.
[0035]
When the tightening roller 2 idles in this way, the tightening roller 2 may scrape the binding band 100 and the shaving wrinkles may be generated. The shaving wrinkles ride on the surplus portion 101 of the binding band 100 generated by the cutting. The excess portion 101 is discharged to the outside of the housing 8. For this reason, it is difficult for a situation in which shavings adhere to the gear train 3 to cause malfunction.
[0036]
As shown in FIG. 4, when the corresponding portion of the first rotating cam 5 is just before moving from the operating portion 5 a to the non-operating portion 5 b, the corresponding portion of the second rotating cam 6 with respect to the second sliding body 62 is the non-operating portion. The operation unit 6a is moved from 6b. As a result, the second lever 61 swings and the cutter 63 moves forward as indicated by the arrow c, and the surplus portion 101 of the binding band 100 is cut as shown in FIGS.
[0037]
Since the electric motor 1 is driven until the third rotating cam 7 kicks the kick piece 12 of the limit switch 11 even after the binding band 100 is cut, the surplus portion 101 of the binding band 100 is tightened after the cutting. The roller 2 is discharged out of the housing 8 as indicated by an arrow d.
[0038]
When the non-operating portion 5b of the first rotating cam 5 corresponds to the first sliding body 51, the presser roller 21 is retracted to the standby position, and the non-operating portion 6b of the second rotating cam 6 is the second sliding body. At the time corresponding to 62, the cutter 63 returns to the standby position, and further, the third rotating cam 7 kicks the kick piece 12 of the limit switch 11 to stop the electric motor 1 and return to the start state of FIG. This completes one cycle.
[0039]
2-4, the arrow attached | subjected in the gear train 3 and the arrow attached | subjected to the tightening roller 2 have shown those rotation directions.
[0040]
In the above configuration, since the first rotary cam 5 and the second rotary cam 6 are provided coaxially on the common intermediate gear 36, the first rotary cam 5 and the second rotary cam 6 overlap with the intermediate gear 36. As a result of the deployment, the internal space of the housing 8 is effectively used, thereby achieving miniaturization. This downsizing action is more prominently achieved by making the position of the swing fulcrum of the first lever 51 and the second lever 61 coaxial with the support shaft 42 that supports the intermediate gear 38.
[0041]
Further, in this portable electric binding band tightening device, when the interval between the tightening roller 2 and the presser roller 21 at the standby position is increased by the interval adjusting mechanism 57, the binding band 100 due to the cooperation of the tightening roller 2 and the presser roller 21 is obtained. The soot pressure is weakened. In addition, by using such a configuration, it is possible to use a thick binding band. Conversely, when the distance between the tightening roller 2 and the presser roller 21 at the standby position is decreased by the distance adjusting mechanism 57, the reed pressure of the binding band 100 due to the cooperation of the tightening roller 2 and the presser roller 21 is increased. In addition, by using such a configuration, it is possible to use the binding band 100 having a small thickness.
[0042]
In this embodiment, although the gear train 3 is employed as the rotation transmission mechanism, the rotation transmission mechanism may be configured by a chain mechanism or a link mechanism.
[0043]
【The invention's effect】
According to the portable electric binding band tightening device according to the present invention, since it is portable, there is no restriction on the binding work place, and the housing is shaped to resemble a short gun, so it is convenient to carry and handle. As a result, the usability is improved and the bundling operation can be performed quickly and reliably.
[0044]
And, it becomes possible to adjust the heel pressure of the binding band by adjusting the distance between the tightening roller and the presser roller at the standby position, and to appropriately correspond to the thickness of the binding band. An appropriate tensile force can be applied to a different binding band or a synthetic resin binding band to perform a reliable binding operation.
[0045]
If the interval adjusting mechanism is constituted by the screw joint portion between the screw shaft and the screw hole, the structure becomes simple and the interval adjustment is easy. Moreover, the use of the tap bolt to the screw shaft serve to cheaper prices, further, when the locking head bolt as the screw shaft by the elastic member, tightening due to vibration or impact generated during bundling operation It is possible to reliably prevent a situation in which the distance between the bolt and the presser bolt changes to change the binding strength.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a main part mechanism of a portable electric binding band tightening device according to the present invention.
FIG. 2 is an explanatory diagram of a start state.
FIG. 3 is an explanatory diagram of a tightening process.
FIG. 4 is an explanatory diagram of a cutting process.
FIG. 5 is an explanatory diagram of the operation of the interval adjustment mechanism.
FIG. 6 is an explanatory diagram showing a second rotating cam and a second lever.
FIG. 7A is a side view showing an appearance of a portable electric binding band tightening device.
(B) is a front view which shows the end surface of a housing.
FIG. 8 is an operation explanatory view of a tightening roller and a presser roller.
FIG. 9 is an explanatory diagram of a start state.
FIG. 10 is an explanatory diagram of a tightening process.
FIG. 11 is an explanatory diagram of a tightening process.
FIG. 12 is an explanatory diagram of a cutting process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric motor 2 Tightening roller 3 Gear train (rotation transmission mechanism)
5 First rotating cam (rotating cam)
13 Rotating shaft of electric motor 21 Presser roller 51 First lever (lever)
52 First sliding body (sliding body)
5a Working part 5b Non-operating part 53 Screw hole 54 Sliding part 56 Loosening prevention member 57 Spacing adjusting mechanism 84 Groove part 100 Binding band H Spacing between the tightening roller and the pressing roller in the standby position

Claims (4)

A tightening roller that feeds the binding band in the tightening direction and a presser roller that presses the binding band against the tightening roller are distributed on both sides of the groove where the binding band is inserted, and the electric motor rotates through the rotation transmission mechanism. The tightening roller is linked to the shaft,
A sliding body is provided at the base end portion of the lever having a swing fulcrum at the intermediate portion, and the presser roller is rotatably supported at the distal end portion thereof, and the lever is rocked by pushing the slide body of the lever to swing the lever. A rotating cam having an operating portion for projecting the binding band to the binding band pressing position and a non-operating portion for allowing the pressing roller to move back from the binding band pressing position to the standby position. A portable electric binding band tightening device comprising an interval adjusting mechanism that increases or decreases an interval between a tightening roller and a presser roller at a standby position.   The sliding body is formed by a screw shaft that is screwed into a screw hole formed at a base end portion of the lever, and a distance adjusting mechanism is formed by a screwing position between the screw shaft and the screw hole. Portable electric binding band tightening device.   The screw shaft forming the sliding body is a headed bolt, and a sliding part for the moving part of the rotating cam is provided at the tip of the head part of the headed bolt. The portable electric binding band tightening device according to claim 2, wherein a locking member is interposed between the base end portion and the base end portion. Locking member, portable electric Ties tightening device according to claim 3, wherein the elastic member.

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