JPH0526511Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a torque detection device that detects the torque of each slit strip formed by slitting a long sheet-like material into a plurality of strips in a winder. Regarding.

[Prior Art] A paper tube in which each slit strip, which is formed by slitting a long sheet-like material into multiple strips using a slitting mechanism, is attached to a winding shaft that is rotatably supported by independent support arms. winding of a group of slit strips forming a number of winding rolls, each being wound by driving a winding shaft, the supporting arm being rotated as the winding diameter increases; In order to wind each of the winding rolls beautifully in the winding machine, it is necessary to perform the winding operation while maintaining the winding tension acting on the slit strip at an appropriate value, in other words, to maintain the winding tension applied to the winding shaft. It is known that it is necessary to automatically perform torque control to maintain torque at an appropriate value.

By the way, in order to automatically perform this type of torque control using a closed-loop control circuit, the magnitude of the torque acting on the winding shaft of the winding roll is detected, and this detected value is used as the value at the time of detection. The output torque of the drive machine that drives the winding shaft so as to compare the torque with the appropriate value set by the torque setting device corresponding to the winding diameter of the winding roll, reduce the deviation, and bring the two into agreement. All you have to do is control it.

Therefore, it is necessary to detect the torque acting on the winding shaft. Conventionally, when detecting the load torque acting on a driven shaft such as the winding shaft, a torque detection shaft coupling is interposed between the driven shaft and the drive shaft, and when power is transmitted, A method of detecting the load torque from the torsional strain occurring in this shaft joint is generally adopted, but this is especially true when the width of the slit strip is small for the support arm that supports the group of winding rolls mentioned above. Since it is not possible to maintain a large distance between adjacent arms, it is difficult to use the torque detection shaft joint described above for detecting load torque. Therefore, conventionally, in a slit strip winding machine, the tension acting on the slit strip is detected using a tension detection device schematically shown in FIG. 1, and from this detected value, the winding shaft 1, A method is used to find the torque acting on the point 1'. That is, the slit strips 2 and 2', which are slit to widths W ₁ and W ₂ by a slitting mechanism (not shown), pass through the guide roll 3 and the intermediate roll 4, and the slit strip 2 with the width W ₁ is formed as follows. A slit strip 2' having a width W ₂ is wound onto a winding roll 6 supported on a support arm 5, respectively.
A tension detection device 7 is installed between the intermediate roll 4 and the winding rolls 6, 6', and a detection roll 8 which is allowed to rotate freely is attached to each tension detection device 7.
On the other hand, for example, a tension force T from the slit strip 2 acts on its support shaft as shown. Therefore, by detecting the resultant force F with the detector 9 consisting of a load cell, the tension T can be obtained from the relational expression: tension T=F/2cosθ, and at the same time, the winding diameter D of the winding roll 6 can be determined by a known appropriate means. By detecting this, the torque acting on the winding shaft 1 can be determined as Tq=T.D/2=D.F/4cosθ. Here, θ is the angle formed by the tension T and its resultant force F.

[Problem to be solved by the invention] However, in the above-mentioned conventional method, when the width of the wound slit strip is frequently changed, it is necessary to align the width centers of the detection roll 8 and the slit strips 2, 2',
For this reason, the support position of the detection roll 8 must be changed, and when the face length of the detection roll 8 is insufficient relative to the width of the slit strips 2, 2', it must be replaced, etc., each time. Since these preparation operations take a long time, not only does this result in a decrease in the efficiency of the actual winding operation, but also there is a problem that even if the detection roll 8 is supported so as to rotate extremely lightly and freely, if the slit strips 2, 2' are made of an extremely thin film, there is a risk of damaging them.

This invention was made in order to solve the above-mentioned problems of conventional torque detection devices used in winding machines for each slit strip formed by slitting a long sheet material into multiple strips. be.

[Means for Solving the Problems] A torque detection device for a winding machine for slit strips of long sheet-like material according to this invention is provided with a torque detection device rotatably attached to each of a plurality of support arms arranged independently and in parallel. Each supported winding shaft is driven by a drive machine, and a long sheet-like material is slit into multiple strips either directly on each winding shaft or on a paper tube attached to each winding shaft. Each slit strip is wound up, and the winding torque acting on each of the winding shafts of the winding machine is such that each support arm rotates or moves linearly as the winding diameter increases. In the torque detection device for a winding machine for a slit strip of a long sheet-like material, the drive machine is rotatably mounted on the support arm, and the output shaft of the drive machine and the winding shaft are rotatably attached to the support arm. At the same time, a torque arm that rotates together with the drive machine is integrally attached to the drive machine, and the rotation of the drive machine is suppressed by receiving the torque arm during power transmission. A reaction force detector for detecting rotational reaction force generated in the drive machine is fixed to the support arm, and the winding torque acting on the winding shaft is indirectly detected from the reaction force detected by the detector. It is structured with the following characteristics.

[Function] In the torque detection device for a winder for winding a slit strip of a long sheet-like material having the above-mentioned configuration, the winding shaft is rotationally driven by a drive device attached to a support arm, When the slit strip is wound up directly on the winding shaft or on a paper tube attached to the winding shaft, a torque arm that is integrally attached to the drive machine and rotates together with it is a support arm. Rotation of the drive machine is suppressed by being received by a reaction force detector fixed to the drive unit. The rotational reaction force generated in the drive machine at this time is detected by a reaction force detector, and the winding torque acting on the winding shaft is indirectly detected from the reaction force detected by this detector. will be done.

[Embodiments] Hereinafter, preferred embodiments of this invention will be described with reference to the drawings.

2 and 3 show one embodiment of this invention, FIG. 2 is a side view showing the main parts of the torque detection device, and FIG. 3 is a cross section of FIG. 2 taken in the direction of the arrow. FIG. 3 is a partially sectional front view. In the figure, a winding shaft 1 is equipped with a paper tube for winding a slit strip 2.
is rotatably supported by a bearing housing 10 fixed to the upper end of the support arm 5 via a rolling bearing 11, and is connected via a shaft coupling 13 to the output shaft of its driving machine, that is, a hydraulic motor 12. . The hydraulic motor 12 is mounted on the support arm 5 by attaching it to a mounting housing 14 that is rotatably engaged with the support arm 5 via a pair of rolling bearings.
This is done by connecting the flanges of each other with fastening bolts. Therefore, the hydraulic motor 12 is rotatably mounted on the support arm 5 via the mounting housing 14. In FIG. 2, when the winding roll 6 is rotated in the counterclockwise direction shown in the figure and the winding shaft 1 is driven by the hydraulic motor 12 in order to wind the slit strip 2, the hydraulic motor 12 itself drives the winding shaft 1. 1, the torque arm 15 integral with the mounting housing 14 is rotated clockwise together with the mounting housing 14.
is provided, and the torque arm 15 is received by a hemispherical pressure receiving portion of a load cell 16 fixed to an overhanging abutment of the support arm 5, thereby suppressing the rotational movement. Therefore, if the pressing force acting on the pressure receiving portion, that is, the reaction force, is R, the reaction force R is detected by the load cell 16, that is, the reaction force detector. Here, the output torque of the hydraulic motor 12 that drives the winding shaft 1 is Tq ₀ , and the load torque applied to the winding shaft 1 by the hydraulic motor 12, that is, the winding torque acting on the winding shaft 1 is Tq 0 . Assuming Tq, Tq ₀ = K ₁・Tq (a). On the other hand, the torque required to suppress the rotation of the hydraulic motor 12 due to the reaction force R generated when power is transmitted from the hydraulic motor 12 is R·r, where r is the effective arm length of the torque arm 15 as shown in the figure. , Therefore, Tq ₀ =K ₂・R・r (b). Here, K ₁ and K ₂ are coefficients for correcting rolling friction torque, etc. that occur because the winding shaft 1 and the hydraulic motor 12 are supported via rolling bearings, respectively, and both are constants. and,
From formulas (a) and (b), Tq=K ₂ /K ₁・R・r …(c) However, since r is constant at the effective arm length of the torque arm 15, Tq=K・R ...(d) (K ₂ /K ₁・r=K: constant). From equation (d), it can be seen that the winding torque Tq is proportional to the reaction force R detected by the load cell 16, that is, the reaction force detector, and the winding torque
Tq is from the reaction force R detected by the reaction force detector.
It can be easily obtained using equation (d).

FIG. 4 shows the main parts of a torque detection device in a winder of surface center combination drive type in which the support arm 5 moves linearly to the right as the winding diameter of the winding roll 6 increases. FIG. In this embodiment of the winder, a pneumatic cylinder 21 fixed to a base 20 is provided with a constant pressure so that the winding roll 6 always contacts the contact roll 4' with a constant contact pressure. Pressurized air is supplied,
A sliding base 22, which is integral with the support arm 5 and is slidably engaged with the base 20, is adapted to be subjected to a constant pressing force by the actuating rod of the cylinder 21. The torque detection device is the same as that shown in FIGS. 2 and 3 above, so its explanation will be omitted.

In the two embodiments described above, the hydraulic motor 12 is used as the drive device for the winding shaft 1.
Alternatively, a flange-type electric motor can be used to construct a device similar to that described above.

[Effects of the invention] Since this invention is constructed and operates as explained above, the torque detection device for the winding machine for slit strips of long sheet-like material has the following effects:
When winding up a slit strip of any width as a winding roll, due to the width limit of the winding shaft or the paper tube that can be attached to it, it is necessary to change the support position of the tension detection roll or There is no need for any preparation work such as replacement, and the winding torque can be detected at any time during operation without affecting the efficiency of the winding operation. Since the parts do not come into direct contact with each other, there is no risk of damaging the slit strip.Furthermore, the torque applied to the winding shaft must be adjusted to an appropriate value in order to wind the winding roll beautifully. This can be highly effective in automatically performing maintenance torque control.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a conventional winding torque detection device, FIG. 2 is a side view showing the main parts of a torque detection device according to an embodiment of this invention, and FIG. - FIG. 4 is a partially sectional front view when the cross section is viewed in the direction of the arrow, showing another embodiment of this invention, and is a side view of the main part of a torque detection device in a winding machine with a transverse support arm. DESCRIPTION OF SYMBOLS 1... Winding shaft, 2... Slit strip, 5... Support arm, 6... Winding roll, 12... Drive machine (hydraulic motor), 13... Shaft coupling, 15... Torque arm, 16
...Load cell (reaction force detector).

Claims (1)

[Scope of utility model registration request] Each winding shaft rotatably supported by a plurality of support arms arranged in parallel independently is driven by a drive machine, and the paper is attached directly to or attached to each winding shaft. Each slit strip formed by slitting a long sheet-like material into a plurality of strips is wound around a tube, and each of the support arms rotates or moves linearly as the diameter of each winding increases. In a torque detection device for a winder for a slit strip of a long sheet-like material, the torque detection device is configured to detect the winding torque acting on each winding shaft of the winder.
The drive machine is rotatably mounted on the support arm, the output shaft of the drive machine and the winding shaft are mechanically connected, and a torque arm that rotates together with the drive machine is integrally attached to the drive machine. A reaction force detector is fixed to the support arm, and the reaction force detector is fixed to the support arm, and detects rotational reaction force generated in the drive machine by suppressing rotation of the drive machine by receiving the torque arm during power transmission. Torque detection in a winding machine for a slit strip of a long sheet-like material, characterized in that the winding torque acting on the winding shaft is indirectly detected from the reaction force detected by the detector. Device.