JPS6373127A - Torque detecting mechanism - Google Patents

Abstract

PURPOSE:To make it possible to detect the torques of a driving gear and a slave gear with a simple constitution, by incorporating a load detector in a supporting system for an intermediate gear, which is provided between the driving gear and the slave gear, and receiving the engaging tangential force of the intermediate gear by the load detector. CONSTITUTION:When a driving shaft 1 is driven and rotated by a driving motor, driving torque is transmitted by a driving gear G1, a slave gear G2 and an intermediate gear G3. The gears G1-G3 are rotated around the driving shaft 1, a slave shaft 2 and a supporting shaft 3. Therefore, the torque is transmitted to a winding shaft, and the winding shaft is rotated together with a winding roll as a unitary body. The torques of the gears G1 and G2 and their reaction forces act on the gear G3. The gear G3 receives the engaging tangential forces of the gears G1 and G2. The tangential forces are proportional to the torques of the gear G1 and G2. The torques of the driving shaft 1 and the slave shaft 2 are detected by detecting the engaging tangential force of the gear G3 with a load detector D.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a torque detection mechanism.

Structures of conventional examples and their problems For example, a slitter that shreds a web material such as paper into a plurality of strips and winds them onto a take-up roll is generally used. Generally, a slitter has a winding shaft and a winding arm, and the winding shaft is supported at the tip of the winding arm and is transmission connected to a rotational drive system such as a drive shaft or a transmission shaft. Therefore, when the take-up roll is attached to the take-up shaft, the take-up roll and the take-up shaft can be rotated together, and the web material can be wound onto the take-up roll.

By the way, for this type of slitter, what is also important for f& is the tension of the web material. To properly wind the web material, it is necessary to apply a predetermined tension to the web material and ensure that the tension does not fluctuate. Additionally, depending on the winding diameter of the take-up roll, it may be necessary to increase or decrease the tension in the web material.

To achieve this, the torque of the drive system is detected as the torque of the winding shaft. Then, it is sufficient to perform feed-patch control using a feedback control mechanism. As is well known, increasing or decreasing the torque on the winding shaft will correspondingly increase or decrease the tension in the web material. Therefore, feedback control of the torque of the take-up shaft allows the tension of the web material to be adjusted as desired.

However, conventional mechanisms for detecting the torque of the winding shaft have had problems. Up to now, several torque detection mechanisms have been developed, but all of them have complicated configurations and cannot be made compact.For this reason, the drive system is located far from the winding shaft. Although it is possible to detect the torque of It was not possible to accurately detect the torque of the shaft, and it was not possible to accurately adjust the tension of the web material.
There has been a demand for the development of a torque detection mechanism that can be incorporated in a position close to the winding shaft. In order to install it near the winding shaft, it is necessary to have a simple configuration that can accurately detect torque.

Purpose of the Invention Accordingly, the present invention has been made with the object of accurately detecting torque with a simple configuration.

Structure of the Invention According to the present invention, an intermediate gear is interposed between a driving gear and a driven gear, and the intermediate gear is meshed with the driving gear and the driven gear. Furthermore, a load detector is incorporated into the intermediate gear support system,
The load detector is configured to receive meshing tangential force of the intermediate gear. The present invention is characterized in that the torque of the driving gear and the driven gear is detected by a load detector.

Description of examples The present invention will be described in detail below.

In Fig. 1, this mechanism is for rotationally driving the take-up roll and take-up shaft of the slitter, and is driven by a drive gear (G1
), a driven gear (G2) and an intermediate gear (G3). The intermediate gear (G3) is the driving gear (G1) and the driven gear (G
2) placed between and interlocked with this. Also,
This mechanism is installed near the take-up shaft, the take-up shaft is supported at the tip of the take-up arm (A), and the drive gear (G1) and driven gear (G2) are connected to the drive shaft (1) and the driven shaft ( 2
), and the drive shaft (1) and driven shaft (2) are supported by bearings (B1) and (B2) of the winding arm (A) and are rotatably guided. And the drive shaft (1)
is transmission connected to the drive motor, and the driven shaft (2) is transmission connected to the winding shaft. The intermediate gear (G3) is supported by a bearing (B3) of the support shaft (3) and is rotatably guided.

Furthermore, for the intermediate gear (G3) and the support shaft (3), a load detector (D) is incorporated into the support system, and the load detector (D) is used to calculate the meshing tangential force (F) of the intermediate gear (G3).
It is configured to receive In this example, the support shaft (
3) is fixed to the tip of the lever (4), the lever (4) is supported by the bearing (B4) of the spindle (5) and is swingably guided, and the spindle (5) is fixed to the winding arm (A). ) is fixed in place. Further, as shown in Fig. 2, the driving gear (G1), the driven gear (G2), and the intermediate gear (G3) are arranged on the - straight line (Y), and the lever (4) is placed on the straight line (Y).
The support shaft (5) extends along the direction Y), and the support shaft (5) is disposed intermittently with the driven shaft (2) of the driven gear (G2). Then, the load detector (D) is placed perpendicular to the straight line (Y), and the intermediate gear (G
3) spindle (3) and the spindle (6) of the winding arm (A)
It is attached to and supported in a swingable manner. The load detector (D) consists of a strain gauge type load cell.

In the mechanism configured as described above, when the drive shaft (1) is rotationally driven by the drive motor, the drive gear (G1)
, the driving torque is transmitted by the driven gear (G2) and the intermediate gear (G3), and the driving gear (G1) and the driven gear (G2) rotate integrally with the drive shaft (1) and the driven shaft (2), The gear (G3) rotates around the support shaft (3). Therefore, the torque is transmitted to the take-up shaft, and the take-up shaft rotates integrally with the take-up roll. Accordingly, the web material can be wound onto a take-up roll.

In addition, as shown in FIGS. 3 and 4, the drive gear (G
1) When the driving torque is transmitted by the driven gear (G2) and the intermediate gear (G3), the torque and reaction force of the driving gear (G1) and the driven gear (G2) are transmitted to the intermediate gear (G
3), and the intermediate gear (G3) receives meshing tangential forces (Fl) and (F
2) Receive. Therefore, the meshing tangential force (F
) occurs in the intermediate gear (G3). Meshing tangential force (F)
is proportional to the torque (M) of the driving gear (G1), driven gear (G2), and intermediate gear (G3).

If the radius of the intermediate gear (G3) is (d), the meshing tangent (F) is expressed by the following equation.

Then, the lever (4) swings around the support shaft (5),
The load detector (D) swings around the support shaft (6), and the meshing tangential force (F) of the intermediate gear (G3) is transmitted to the support shaft (3) and the load detector (D). Therefore, the load detector (D) detects the meshing tangential force (F) of the intermediate gear (G3).
and detect it. Therefore, the load detector (D
), the torque (M) of the drive gear (G1) and the driven gear (G2) can be detected, and the torque (M) of the drive shaft (1) and the driven shaft (2) can be detected.

Therefore, the torque of the winding shaft can be detected by the load detector (D). Therefore, when the torque is feedback controlled by the feedback control mechanism, the tension of the web material can be arbitrarily adjusted. Therefore, the web material can be wound up accurately.

Furthermore, this mechanism has a driving gear (Gl) and a driven gear (G2).
), the intermediate gear (G3), and the load detector (D) are simply combined (, the configuration is simple. Therefore, the whole can be made compact.

Therefore, by incorporating this at a position close to the winding shaft, it is possible to detect the torque (M) of the driving shaft (1) and the driven shaft (2) at a position close to the winding shaft. As a result, the torque of the winding shaft can be detected accurately and the tension of the web material can be adjusted accurately.

Note that various modifications can be made to this invention. For example, as shown in Fig. 5, the support shaft (3) of the intermediate gear (G3)
) is fixed at a predetermined position on the winding arm (A) and supported in a cantilever manner. A load detector (D) is built into this support shaft (3), and the load detector (D) is configured to receive the meshing tangential force (F) of the intermediate gear (G3), and the cable (7) is connected to the support shaft. (3) and may be connected to the load detector (D). In this case as well, the drive gear (
G1) and the torque (M) of the driven gear (G2) can be detected. As shown in Figure 6, the intermediate gear (G
The support shaft (3) of 3) may be supported at both ends, and the load detector (D) may be incorporated into this support shaft (3). In short, it is sufficient to incorporate the load detector (D) into the support system of the intermediate gear (G3). Then, the load detector (D) is connected to the intermediate gear (
When configured to receive the meshing tangential force (F) of G3), the torque (M) of the driving gear (Gl) and the driven gear (G2) can be detected by the load detector (D),
Similar effects can be obtained.

Further, the drive gear (G1), the driven gear (G2), and the intermediate gear (G3) do not necessarily need to be arranged on the - straight line (Y). In some cases, as shown in FIG. 7, the drive gear (Gl) may be shifted by a certain angle (α) with respect to the straight line (Y). In this case as well, the meshing tangential force (Fl), (F2) of the driving gear (Gl) and the driven gear (G2) acts on the intermediate gear (G3), and the intermediate gear (G3)
l) and a meshing tangential force (F) proportional to the torque (M) of the driven gear (G2). This meshing tangential force (
F) is expressed by the following formula.

F = (FI + F2) CO5- Therefore, the drive gear (Gl
) and the torque (M) of the driven gear (G2) can be detected, and the torque of the winding shaft can be detected.

Note that the present invention is not limited to the drive system that rotationally drives the take-up roll and take-up shaft of a slitter, but the present invention can also detect the torque of the rotation drive system of other machines. It can be applied to any machine that needs to detect the torque of a rotational drive system.

As described in detail, the present invention can accurately detect torque with a simple configuration. So, for example,
In a slitter that winds web material onto a take-up roll,
The entire torque detection mechanism can be made compact and can be incorporated at a position close to the winding shaft. As a result, the torque of the winding shaft can be detected accurately and the tension of the web material can be adjusted accurately, thereby achieving the intended purpose.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the invention, and FIG.
3 and 4 are explanatory diagrams showing a state in which meshing tangential force is generated in the intermediate gear of FIG. 1, and FIGS. 5 and 6 are sectional views showing a modification of FIG. 1, Figure 7 is the 4th
It is an explanatory view showing a modification of the figure. (G1)・・・・・・・・・・・・・・・・・・
・・・Drive gear (G2)・・・・・・・・・・・・・・・
・・・・・・・・・Followed gear (G3)・・・・・・・・・
・・・・・・・・・・・・・・・・・・Intermediate gear (D)・
・・・・・・・・・・・・・・・・・・・・・ Load detector patent applicant Nishimura Seisakusho Co., Ltd. Representative Kenji Shinji (1 other person) Fig. 1 Fig. 2 Figure 5

Claims (1)

[Claims] An intermediate gear is interposed between the driving gear and the driven gear, the intermediate gear is engaged with the driving gear and the driven gear, and a load detector is incorporated into the support system of the intermediate gear,
A torque detection mechanism characterized in that the load detector is configured to receive meshing tangential force of the intermediate gear, and the load detector detects torque of the drive gear and the driven gear.