JPS6035233A - Torque detecting method and winding torque detecting device - Google Patents

Abstract

PURPOSE:To monitor winding torque in the vicinity of a winding shaft, by obtaining the transmitting force in the direction of a common tangential line between the tips of the teeth of two gears from the measured value of a load meter when power is transmitted to a measuring gear and a driving gear for said gear, and computing the transmission torque or the amount of change thereof. CONSTITUTION:A shaft 1a of a measuring gear 1 is directly or indirectly supported through a load meter 3 such as a load cell so that the movement in the direction crossing a common central line C of the measuring gear and a driving gear 2 is controlled. When power for both gears 1 and 2 are transmitted, a transmitting force F in the common tangential direction between the tips of the teeth of both gears 1 and 2 is obtained from the detected value (f) of the load meter 3. Based on the force F, transmission torque 7 or the amount of change thereof is computed.

Description

[Detailed Description of the Invention] The present invention relates to a torque detection method and a winding torque detection device, which measures the reaction force of a gear shaft support in a transmission mechanism, determines the transmission force of the tooth tip, and calculates the transmission torque from this. This is how it was done.

Conventionally, the torque of the drive shaft has been determined by measuring the amount of torsional distortion of the shaft or by detecting the difference in tension between the tension side and the slack side of the belt. The former has problems in that it is complicated and large, and the latter has problems in that the belt stretches and requires adjustment.

The purpose of this invention is to develop a torque detection method and device suitable for monitoring winding torque near the winding shaft and controlling the torque, which has practical value rather than academic accuracy. Next, the configuration and embodiments of the present invention will be described with reference to the drawings.

1 to 8 show six embodiments of the method of this invention. In each case, the axis /α of the measuring gear / is supported directly or indirectly via a load meter 3 such as a load cell so as to control movement in the direction intersecting the common center line C of the gear / and the driving gear λ, When transmitting power to both gears 1 and 2, the common tangential transmission force F between the tips of both gears 1 and 2 is calculated from the detected value f of the load meter 3, and the transmitted torque or the amount of change thereof is calculated from this.

FIG. 1 is an explanatory diagram of the embodiment device of FIG. 10.11. The measurement gear l is the gear to be detected for torque, and has a center line C in common with the output gear da and the drive (input) gear. In this case, the axis lα of the gear l is restrained from moving in the direction of the common tangent T by the load cell 3 via the bearing /b.

During operation, the drive gear rotates in the direction of the arrow.
Assume that the load cell 3 is turned and the measured value of the load cell 3 is f. At this time, the transmission force F between the tips of gears 1 and 1 is easily calculated from FIG. In other words, the force f pushing the shaft /α in the same direction by the tooth tip transmission force F is measured using the contact point P of the gear / as a fulcrum. become.

F=ipu=T! If gears /, J, and II are arranged on the same center line, the calculation is easy as shown above, but if they are not on the same center line as shown in Fig. 5, as shown in Fig. 4, If we consider the gear/ as a dogleg-shaped lever, and calculate the moment of rotation of the gear/, 4t using the contact point P as a fulcrum, and the component force in the same direction as the transmitted force f of the shaft/α, we can easily change from f to F. I can't stand it.

The example shown in FIG. 5 roughly corresponds to the embodiment shown in FIGS. 12 to 14, but the magnetic particle clutch is omitted. Instead of applying the load cell 3 directly to the gear bearing /b as shown in Fig. 1, the gear shaft lα is passed through one end of the beam 5, the fixed shaft of the gear da is passed through the center, and the load cell 3 is placed on the opposite end. The movement of gear shaft /a was controlled via beam 3. In this case, the force f exerted on the load cell 3 is equal to the thrust force f' on the gear shaft /a, and the transmitted force F is half the value of f', as in the case of FIG. The gear shaft shown in cross section is a shaft manufactured by the company.

FIG. 6 corresponds to FIG. 1718. The output gear DA in Figure 1.5 has been changed to an output belt wheel, belts I and a. The bearing /b of the gear / is restricted to be able to move only in the horizontal direction. In this case, the free rotation of the gear l is controlled by the belt 6α, and the lateral force of the gear shaft 15 measured by the load cell 3 becomes equal to the transmitted force F, if friction is ignored.

Figure 7 corresponds to Figure jK19.20, and like the measuring gear l in Figure #86, it is restrained by the belt wheel 6 and belt 6α, and the gear shaft /a has the axis of the drive gear 2 as its central fulcrum. Rotation is controlled by the beam S' and a load cell 3 applied to the other end. Therefore, in this case as well, the measured value f of the load cell 3
is equal to the reaction force f' on the gear shaft /α at the opposite end of the beam 51, which is also equal to the transmission force F between the tips of the gears /2.

In the example shown in Fig. 8, an arbitrary passive and driving gear /, 2 in the transmission gear system is selected for torque detection without adding any gear, and the passive gear / is set as the opening gear.
This is an example in which the load cell 3 is simply inserted between the bearing stand and the bearing stand. The means for floating the bearing/b is arbitrary; if you loosen the tightening bolts 7 on both sides and place the load cell 3 in the center as shown in the figure, the measured value f can be obtained as is from the transmitted force F.
You may correct the measured value by loosening only one side and inserting the load meter 3 on that side. Note that even if the tightening bolt is loosened, it is necessary to take measures to prevent the bearing from moving due to the force in the direction of separating the gears.

All of the above mechanical explanations ignore friction, but in most cases there is no practical problem in feedback control of winding torque and other torque controls even if errors due to friction are ignored. Rather than detecting the value of the torque itself, the main control is to detect the change from a constant torque and control accordingly, so it is not an academically accurate value, but an approximate amount of change. That alone is helpful enough.

Next, the configuration and embodiments of the invention of a winding torque detection device to which the above torque detection method is applied will be explained with reference to FIG. 9 and subsequent figures.

FIG. 9 shows an example of a winding device, in which a wide sheet S is divided into several strips by a slitting device, distributed to winding shafts 10 on both sides in contact with a central touch roller g, and wound up. The winding shaft lθ is attached to the tip of each winding arm and is driven to rotate. The winding arm l/ is the sheet S wound around the winding shaft 10.
As the roll thickens, the sheet roll gradually rises away from the touch roller, and after winding up the sheet roll, it stands straight up as shown in the figure, hands the wound sheet roll R to the crane, and attaches a new roll shaft.

In addition to the winding arm that looks like a swinging arm as shown in the embodiment shown in the figure, there is also a winding arm that is a block body that does not feel like an arm and that approaches and leaves the touch roller in a straight line. This winding arm is equipped with a transmission mechanism from a motor or line shaft (common drive shaft) serving as a driving source to a winding shaft at the tip. In the case where there is only one pair of winding arms, it is a matter of heat theory, but even when there are multiple pairs of winding arms, as in the winding device with a slipper in the embodiment shown in Fig. 9, in order to improve the quality of each sheet roll, Winding torque control must be performed individually. Therefore, a simple torque sensing device attached to each take-up arm is the center machine.

Conventionally, a belt section was added to the drive mechanism of the take-up arm, and the tension was measured by passing the belt through a well-known tension detection device.
This was converted into torque. This detection method has problems such as it occupies a large volume as a whole, the belt stretches as it is used and requires adjustment, the detection accuracy is uncertain, and it cannot be applied to drive mechanisms that do not use a belt.

Since the torque detection method of the present invention targets gears, a winding torque detection device that eliminates the above problems can be obtained.

Figure 10.11 shows a torque detection device that embodies the torque detection method explanatory diagram in Figure 1, and is attached to the winding arm l/, but it can also be installed on the frame of a drive mechanism other than the winding device. This is an example that can be installed as is.

In this case, the upper and lower shaft holes that pass through the winding arm //,
Pass the shafts of the output gear shaft and the drive (input) gear through /3, insert the measuring gear shown in FIG.

Two horizontal guide rods 16 are passed through between is.

Therefore, the gear shaft 18 can be moved in the horizontal direction at right angles to the common center line C of the gears, and its movement is controlled by the restraint frame l! through the load cell 3. It is suppressed by an adjustment screw 17 attached to the. The adjustment screw on the restraining frame lψ side is for aligning the center of the bearing lb with the center line C.

The torque detection device of the embodiment shown in FIG. 10.11 includes the measuring gear 11, its bearing /b, and the restraint frame /4! ,/! , guide rod/
6. The adjustment screws /l, /g after the cocoon and the load cell 3 are all that is needed, and it is extremely simple. 1 of the detected value f of load cell 3
As explained earlier, /2 is the force F between the tips of gears/ and here, and it goes without saying that if you multiply that F by the radius of gear/or gear, you will get the respective torque. .

The embodiments shown in Fig. 12 and below apply this invention to the winding arm/l shown in Fig. 9. Figs. 12 to 16 show cases in which only gears are used, and Fig. 17 and below show cases in which a belt is added. show. First, to outline the case where only gears are used, in the transmission mechanism of the winding arm // that rotationally drives the winding shaft 10 (Fig. 9) attached to the tip, there is a
Equipped with a measuring gear / that makes both gears and center line C common to y,
In addition, a load cell 3 such as a load cell installed so as to control the movement of the axis ia of the measuring gear / in the direction perpendicular to the common center line C
This is a winding torque detection device characterized by comprising a support mechanism including:

The relationship between the output gear DA, the drive gear KO, and the measuring gear 1 between them in FIGS. 12 to 16 is the same as that in FIGS. 1 and 10. When the drive gear at the base of each winding arm is rotated by the line shaft shown in FIG. The magnetic powder clutch output shaft Oα, adjusted to the torque, rotates. This is a structure in which the winding shaft to' (in this case, a pusher tip that clamps both ends of the winding core) is rotated via the belt 6α. The embodiment shown in FIGS. 12 to 16 measures the transmitted torque before it reaches the magnetic particle clutch 20 or the belt 6c. The torque detection mechanism is as explained in FIG. The axis lα of the measuring gear / is the beam 5
The beam S rotates around the axis lα of the output gear. It is controlled by the load cell 3 that hits the protrusion 2/ on the upper end and the adjustment screw/7 on the arm 11 side.

In the case of Fig. 5, the fulcrum of the beam S was in the center, so /
, f' were equal, and 1/2 thereof was taken as the transmitted thrust F. , i12.15 In the example shown in Fig. 15, the distance l from the output gear shaft, which is the fulcrum of the beam S, to the contact part of the load cell 3 is not equal to the distance m to the intermediate passive gear shaft /, so the transmitted force F =1/2・I! It will be 廓・f.

In the two embodiments shown in FIG. 17 and below, the gear at the end of the magnetic particle clutch output shaft SOα is used as the driving gear, and the measuring gear l with 6 belt wheels is used.
This is to detect the winding torque. In each case, the shaft support mechanism that controls the movement of the axis /α of the belt wheel number coaxially attached to the measuring gear / in a direction other than perpendicular to the common center line C of the measuring gear / and its driving gear, that is, the 17th. Horizontal restraint material shown in Fig. 18, bearing/6%, beam frame S' shown in Fig. 1920, and a load cell installed to control the movement of the axis/a of the belt car number in the direction perpendicular to the common center line C. This is a winding torque detecting device characterized by comprising a support mechanism including a load meter 3 such as the above, a holding member shown in FIG. 17, and set screws 23 and 7, 7g shown in FIG.

In Fig. 12.15, the transmitted torque entering the magnetic particle clutch 2o is detected, but in the embodiment shown in Fig. 17.18, the transmitted torque output from the magnetic particle clutch θ is detected, and is suitable for feedback control. That is, the gear at the tip of the magnetic particle clutch output shaft is the drive gear shown in Fig. 6, and the gear with the belt wheel 6 that meshes with it is the measurement gear/, and the transmission force F between the two is
It was designed to make it easier to understand. It is the belt 6cL that transmits the torque of the measuring gear l to the winding shaft 10', and in order to support the bearing /b that receives the tension with the horizontal restraint member: t, the bearing i
The value of the load cell 3 that measures the horizontal (direction perpendicular to the common center line C) reaction force of b is considerably influenced by friction. Therefore, the sixth
The measured value f in the figure is corrected by adding the frictional force between the bearing and the guide material and becomes equal to the transmitted force F. However, when detecting the amount of change in the transmitted force F and performing feedback control, it is Available.

In the embodiment shown in FIGS. 19 and 20, as shown in FIG. 7, the belt wheel 6 and measuring gear shaft /a passes through the upper end of the swinging beam frame to support the tension of the belt 6α, so the effect of friction is eliminated from the previous example. Less. The beam frame S' is the 19th frame in order to support the shaft /a at both ends.
It has a groove shape as shown in the figure, with the shaft of the drive gear as the fulcrum, and the load cell 3 is placed at the bottom end. From fulcrum to gear shaft/
a. Since the load cell 3 contact point is equidistant, the 7th
As shown in the figure, the load meter measurement value f is equal to the transmitted force F by #1 so.

Although the method and apparatus of the present invention have been described above with reference to a small number of embodiments, it goes without saying that the method and apparatus of the present invention can be varied and applied in a variety of ways according to the known techniques of the engineer who carries out the implementation and according to the implementation conditions. There are also many applications other than winding devices. In the example, the force in the direction perpendicular to the common center line is detected using a load cell.
It goes without saying that oblique forces may be detected and corrected as necessary.

The present invention has been able to provide a torque detection method with sufficient accuracy necessary for torque control without being concerned with academic measurement accuracy. Furthermore, by taking advantage of its simplicity, the present invention also provided a winding torque detection device that measures the winding torque for each winding arm.

Since the reaction force of the gear shaft in the power transmission system is measured, the length of the shaft does not become an issue, unlike the conventional method of measuring torsional strain on the shaft, and the device is extremely simple.

Since the required space is small, it is extremely easy to measure the rotational torque of various machines and devices, but especially in the case of winding devices, by installing this detection device near the winding shaft, it is possible to The winding torque of the sheet roll can be feedback-controlled with the highest accuracy, and the winding torque can be constantly controlled to an optimum value as the sheet roll grows, so that the winding quality can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the method of this invention, Fig. 2 is a mechanical explanatory diagram thereof, Fig. 5.4 is a similar embodiment with a different gear arrangement and its mechanical explanatory diagram, and Fig. 5.6. 7.8 is an explanatory diagram of the other four embodiments, FIG. 9 is an explanatory diagram of an example of the winding device, No. 10,
Figure 11 is a front view and side view of one embodiment of the device of this invention, Figures 12 and 13 are elevational views and side views of a winding arm to which another embodiment is applied, and Figures 14, 15, and 16 are An enlarged elevation view, side view, and plan view of the main parts, JIB17.18 is an elevation view and side view of another embodiment, and Figure 19.20 is an elevation view and side view of still another embodiment. It is. /...Measuring gear, /b...Co-bearing (shaft support mechanism), K...Drive gear, 3...Load cell, D...Output gear,
//... Winding arm, /7,1g... Adjustment screw (support mechanism), :1.3... Load needle holding material. Figure 1 Salt Figure 5 Figure 3 Figure 6 @ Figure 7 Procedural amendment sound (self 1lA) November 6, 1981 Special 8 ↑ Director General Manabu Shiga 1, indication patent application No. 143134 of 1982 2. Name of the invention Torque detection method and winding torque detection device 36 Relationship with the case of the person making the correction Applicant: Katama Kikai Seisakusho 4, Agent: Kasuya, 1-11-13 Nishi-Shinbashi, Minato-ku, Tokyo 105 building 43
24 Patent Attorney Fuku 1) Nobuyuki 7. Contents of amendment (+) The detailed description of the invention is amended as follows. ■The second line from the bottom of page 7 to the second line from the bottom of page 8, "This winding arm...is broken." has been changed to "This winding arm is dedicated to each winding shaft, which is the drive source." A transmission mechanism is attached from the installed motor or line shaft (common drive shaft) to the winding shaft at the tip.'' ■ "Not less than..." from the first line from the top of page 14 to the fifth line from the top of the same page has been explained using a small number of examples. It goes without saying that various modifications and applications can be made depending on the well-known techniques of the engineers involved in the implementation, depending on the implementation conditions. , instead of a winding device in which the winding arm side swings, there is a type with long touch rollers on each side of the left and right sides, a type with individual short touch rollers for each winding shaft, and a type with individual short touch rollers for each winding shaft. The shaft is always supported in a fixed position by the take-up arm, and the touch roller separates as the sheet roll thickens, and a fluid pressure cylinder, etc. is installed on the swingable touch roller, and the swingable take-up The rotation of the 0-winding axis, which may be a winding device such as a type in which a touch roller is pressed against the surface of the sheet roll so that the sheet roll at the tip of the arm remains at a substantially constant position even during sheet winding, is controlled by the rotation of the center axis.
If a so-called friction-type winding shaft is used, in which the information is transmitted to a single winding core through a large number of extra-extrapolated narrow collars, a plurality of sheet rolls can be wound up with one winding shaft. Furthermore, the winding device is not the above-mentioned dividing winding device, but a rewinding device that has a function of cutting off only the edges of a wide belt-like sheet, or a rewinding device that simply winds a long belt-like sheet to the required length. "Also, there are many applications other than winding devices."that's all

Claims (3)

[Claims] (1) The axis of the measuring gear is directly or indirectly supported via a load cell such as a load cell so as to control the movement in the direction intersecting the common center line of the gear and its driving gear, and the shaft of the measuring gear is A torque detection method characterized in that, at the time of transmission, a common tangential transmission force between the tips of both gears is calculated from the measured value of the load meter, and the transmission torque or the amount of change thereof is calculated accordingly. (2) In the transmission mechanism of the winding arm that rotationally drives the winding shaft attached to the tip, a measuring gear is provided between the drive gear and the output gear so that both gears share the center line y, and the above-mentioned A winding torque detection device characterized by comprising a support mechanism including a load meter such as a load cell provided so as to control movement of the shaft of the measurement gear in a direction crossing the common center line. (3) In the transmission mechanism of the winding arm that rotationally drives the next winding shaft, the mark attached to the tip is perpendicular to the common center line of the measuring gear and its driving gear, of the axis of the belt wheel to which the measuring gear is coaxially attached. It is characterized by comprising a shaft support mechanism that controls movement in a direction other than the direction, and a support mechanism that includes a load meter such as a load cell provided so as to control movement of the shaft of the belt wheel in a direction that crosses the common center line. A winding torque detection device.