JPS628383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting the load pressure of a touch roll that is brought into contact with the winding of pressure-sensitive copying paper in a winder.

Among papers, pressure-sensitive copying paper, for example, utilizes the reaction between a colorless organic color former and a color developing substance that can react with the color former to form a colored product. Specifically, a sheet coated with microcapsules containing a solution of an organic coloring agent in an organic solvent, a sheet coated with a color-developing substance on one side of the support together with a binder, and a sheet coated with a color-developing substance on one side of the support on the opposite side. In another embodiment, there is a sheet (single coloring paper) in which the microcapsules and a color-developing substance are coated on the same side of a support.

Such pressure-sensitive copying paper is currently used in a wide variety of fields, and its usage forms can be divided into lithographic and roll forms.

Manufacturers of pressure-sensitive copying paper ship it in lithographic and roll formats to suit each type of usage. Among these, roll-shaped ones in particular are made by winding up an original fabric coated with paint using a coater while cutting it into predetermined lengths and widths using a winder. When winding pressure-sensitive copying paper, the winding method for general paper cannot be used as is. In other words, when winding general paper, a metal roll is normally used as a tatsuchi roll to ensure hard winding, but when this is used to wind pressure-sensitive copying paper coated with microcapsules, is destroyed, and background stains and color development occur between the rolled sheets.

For this reason, the applicant of this application first used a specific elastic roll (shore hardness (JIS2246), Hs50 or less) as a tatsuchi roll for winding in a method of winding pressure-sensitive copying paper, and used it under a surface pressure of less than a specific level. A patent application has been filed for an invention for obtaining hard winding without destroying the capsule by pressing the capsule (Japanese Patent Application No. 52-99714), but in this winding method, the load pressure of Tatsuchi Roll against winding is 10 kg. / ^cm2 or less.

If the load pressure is increased above this level, the microcapsules will be destroyed.

Also, depending on the type of roll, it is often specified as hard-wound or soft-wound at the request of the user.
In such a case, the load pressure on the winding is 10Kg/cm ²
Whether the load pressure is kept below 8Kg /
When applying a load pressure of 3 kg/cm ² to obtain a soft-wound product, there is some ^way to check whether the desired pressure is being applied. is necessary. The present invention is directed to a means (device) for confirming such load pressure.

The structure of the present invention is to detect the load pressure of the Tatsuchiroll 3 having shore hardness (JIS2246) Hs50 or less, which is brought into contact with the winding 2 when the pressure-sensitive copying paper 1 coated with microcapsules is wound up with a winder. Both ends of the arm 5 are connected to one end of an arm 5 supported by a fulcrum 4, and the other end of the arm 5 is located below to maintain the upward play width of the Tatsuchi Roll while also allowing the A spring 6 for adjusting the roll load within a range of 10 kg/cm ² or less and a load pressure transducer 7, one of which is fixed, are connected in order to adjust the load pressure when the Tatsuchi roll 3 contacts the winding 2. is caught by the load pressure transducer 7 with a built-in strain gauge and converted into an electrical signal, which is then sent to the amplifier 9 via the switch 8 to be amplified and displayed on the digital display 1.
The feature is that 0 is displayed numerically. In such an apparatus, the Tatsuchi roll has a shore hardness (JIS 2246) of Hs50 or less, especially a roll of Hs30 to Hs40, as mentioned above. As the material, an elastic body such as natural or synthetic rubber is suitable. Note that when a roll with a shore hardness of Hs50 or more is used, scumming occurs due to the destruction of microcapsules, similar to metal rolls.

In addition, even if the elastic roll has a shore hardness of Hs50 or less, if the load pressure on the winding exceeds 10 Kg/cm ² , the microcapsules will be destroyed and scumming will occur. Therefore, the pressing condition of the elastic roll against the winding is within the range of 10 kg/cm ² or less, and is appropriately set in relation to the hardness of the roll and the desired hardness of the winding.

The spring 6 is connected to one end of the arm 5 in a downward direction. The purpose of using a spring here is that as the winding 2 increases in size, the Tatsuchi Roll 3
The purpose is to provide a so-called play width so that it can be pushed upward and moved. Note that if this play width is left free, as the take-up 2 becomes thicker, the Tatsuchi Roll will inevitably be pushed upwards, and the load pressure received by the take-up will also gradually increase, and eventually the winding will stop. The roll is subjected to a load pressure consisting of the entire weight of the roll. In this case, if the roll is subjected to a load pressure of 10 kg/cm ² or more when its own weight is free, the microcapsules will of course be destroyed. For this reason, the spring 6 maintains the play width above the roll, and the load is always adjusted by some means so that the desired load is within the range of 10 kg/cm ² or less. Must be. Adjustment for this purpose requires other means.

The load transducer 7 has a built-in strain gauge, and one side is connected to the spring 6 and the other side is connected to the shaft 11, so that the force when the spring 6 is pulled up by the arm 4 can be captured. There is.

The changeover device 8 has a changeover switch A that controls the contacts corresponding to both load transducers 7, and by arbitrarily selecting the switch position, the force caught by the corresponding load transducer can be transferred to the electric power. It has a function that allows it to be imported as a physical input. When the touch roll 3 is brought into contact with the winding 2, the load pressure adjustment means at the start is adjusted by an adjustment mechanism provided below the weight detector 7. That is, in this adjustment mechanism, for example, when a shaft 11 extending from the weight detector 7 is rotated by a screw 13 through a fixing part 12 and the connected body of the spring 6 and the weight detector 7 is raised relatively upwardly, the Tatsuchi Roll is moved by the see-saw principle. 3's own weight will be applied more to the winding 2, and the load pressure will increase. On the other hand, when the connecting body is lowered relatively by adjusting the screw 13, the touch roll 3 tends to be lifted, and the load pressure applied to the winding 2 is reduced.

By such a method, the load pressure of the Tatsuchi Roll for winding at the start can be freely adjusted. Therefore, there is no need to consider the weight of Tatsutirol to be used.

The device for detecting the load pressure of Tatsuchiroll for winding pressure-sensitive copying paper coated with microcapsules according to the present invention is attached to a winder and is used in particular when winding pressure-sensitive copying paper coated with a spring. Tatsuchiroll, which has a shore hardness (JIS2246) of Hs50 or less, is used with the load pressure adjusted to 10Kg/ ^cm2 or less, which may destroy the microcapsules coated on the pressure-sensitive copying paper or cause colored stains. This means that the desired hardness can be obtained while checking the load pressure.

Although the present invention has been described so far as being used for winding pressure-sensitive copying paper coated with microcapsules, winding is not limited to pressure-sensitive copying paper, but can also be applied to adhesive paper and other papers. It goes without saying that it can be used in the same way for other vehicles as well, if necessary.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a load pressure detection device according to the present invention for detecting the load pressure of a tatsuchi roll that is brought into contact with the winder when pressure-sensitive copying paper coated with microcapsules is wound up with a winder. It is.

Claims (1)

[Claims] 1 When winding the pressure-sensitive copying paper 1 coated with microcapsules with a winder, in order to detect the load pressure of the Tatsuchiroll 3, which is brought into contact with the winding 2 and has a shore hardness (JIS2246) of Hs50 or less, the Tatsuchiroll 3 is
Both ends of the arm 5 are connected to one end of an arm 5 which is supported by a fulcrum 4, and the other end of the arm 5 is located below to maintain the upward play width of the Tatsuchi Roll while also providing a sufficient amount of support for winding. A spring 6 for adjusting the roll load within a range of 10 kg/cm ² or less and a load pressure transducer 7, one of which is fixed, are connected in order to adjust the load pressure when the Tatsuchi roll 3 contacts the winding 2. is caught by a load pressure transducer 7 with a built-in strain gauge and converted into an electrical signal, which is then sent to an amplifier 9 via a switch 8 to be amplified and displayed numerically on a digital display 10. A device for detecting load pressure on a Tatsuchi Roll for winding pressure-sensitive copying paper, characterized in that: