JPH0153390B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a squeezing roll, and more particularly, to a squeezing roll for squeezing out liquid from a continuous fabric supplied in a spread state, and in particular, a squeezing roll for squeezing out liquid from a continuous fabric supplied in a spread state. The present invention relates to a squeezing roll that can obtain a stronger center squeezing effect when squeezing dipping liquid, dyeing liquid, etc.

[Conventional technology]

When a fabric impregnated with a dye or treatment solution is fed to a squeezing roll to squeeze out the liquid, it is preferable to apply a squeezing force as uniformly as possible over the entire width of the fabric. The pressure must be kept uniform over the entire width.

As a squeezing roll suitable for this purpose, a centrally supported uniform squeezing roll is used, as shown in FIG. has been done. Steel is generally used for the support shaft 1 and the cylindrical tube 2.

In the squeeze roll shown in FIG.
If the design is as shown in (a), the cylindrical tube 2 will not substantially bend even when pressurized (see line A in Figure 6), and the covering rubber 3
It is possible to obtain a uniform pressure force distribution over the entire width.

Furthermore, if the length (l) of the fixed part is designed to be larger than (a), the deflection of the cylindrical tube 2 will approach the deflection line D of the support shaft 1 (see line B), and the pressurizing force at the center will be greater than at both ends. It becomes weaker, and the aperture effect tends to be apertured at both ends.

Conversely, if the length (l) of the fixed part is designed to be smaller than (a), the flexure of the cylindrical tube 2 will be in the opposite direction to the flexure line D of the support shaft 1, as shown by line C in FIG. The pressing force at the center is stronger than at both ends, and the throttling effect tends to be at the center.

In this way, the bending line of the cylindrical tube 2 is the length of the fixed part.
It changes depending on (l), but as it is, the length
After (l) is determined and the roll is manufactured,
The deflection line of the cylindrical tube 2, that is, the pressure distribution on the squeeze roll cannot be changed.

Therefore, a squeeze roll equipped with a deflection adjustment mechanism as shown in FIG. 4 has already been proposed and put into practice as a squeeze roll whose deflection amount can be freely adjusted (see Japanese Patent No. 887108). The deflection adjustment function of this squeezing roll will be described later.

[Problem to be solved by the invention]

Generally, in a fabric processing process, it is required to be able to freely adjust the amount of deflection of the squeeze roll in order to adapt to variations in various processing conditions.

For example, in a continuous dyeing process, even if uniformity in squeezing the dye liquid by squeezing rolls in the previous process is ensured over the entire width of the fabric, non-uniformity in drying or steaming treatment in the post process may result. Due to
As a result, the finished form of the fabric often becomes non-uniform along the width direction.

This uneven squeezing of the dye solution generally manifests itself in dyeing as chudoku (the central part along the width direction of the fabric is darker than both ends; the opposite is called chudoku).

In this case, it is practically impossible to correct the non-uniformity of drying or steaming in the subsequent process, so in order to prevent uneven finishing of the fabric, it is necessary to squeeze the drawing roll in the width direction. In order to adapt the rate distribution to subsequent processes, it is required to adjust the amount of deflection of the roll in advance to a center load (center drawing) state.

In the conventionally proposed squeeze rolls with adjustable deflection, the range of deflection adjustment is rather narrow, and the normal level of non-uniformity (medium density) that occurs in the above-mentioned front and back processes can be corrected within the range of center load adjustment. However, it was often not possible to adequately adapt to excessive non-uniformity (medium density) that exceeded this limit.

The main purpose of the present invention is to increase the amount of deflection and strengthen the center load, in order to solve the above-mentioned problems observed in conventional drawing rolls, thereby achieving a stronger center drawing effect. Our goal is to provide squeeze rolls.

[Means to solve the problem]

In view of such an object, the first invention comprises a support shaft rotatably supported at both ends, and a cylindrical tube fixed concentrically to the support shaft at the central portion in the longitudinal direction. and a coating layer fixed to the outer circumferential surface of the cylindrical tube, the drawing roll is configured to extend a predetermined length from the outer end of the fixed area between the support shaft and the cylindrical tube toward the side end of the cylindrical tube. The gist of this invention is a squeeze roll in which a cylindrical tube is formed with an elastically deformable portion having a corrugated longitudinal section.

A second invention also provides a second invention in which a sliding body having a conical head is attached to both ends of the support shaft of the squeezing roll so as to be rotatable and slidable with respect to the support shaft, and the cylindrical tube concave conical guide portions that slidably engage with the conical head of the sliding body are formed on the inner surfaces of both ends of the slide body, and concave conical guide portions that slidably engage with the conical head of the sliding body are formed on both ends of the support shaft; We propose a squeezing roll equipped with a thrust mechanism that applies a thrust along the direction in which the conical head of the cylindrical tube and the concave conical guide of the cylindrical tube engage with each other.

[Effect]

When a fabric impregnated with a dye liquor or a treatment solution is passed between two squeezing rolls and squeezed, the apparent deformation of the cylindrical tube is The value of the moment of inertia of area is very small (a fraction of the moment of inertia of a normal cylindrical pipe), making it easy to bend (high flexibility), so the relief at both ends of the squeezing roll The amount of deflection in the direction increases, resulting in a central load state, which generates a strong squeezing force at the center of the fabric passing surface.

In addition, due to the thrust mechanism, the sliding body engages with the concave conical guide portion of the cylindrical tube, and the elastically deformed portion of the cylindrical tube is elastically deformed, so that the support shaft and the cylindrical tube are in an unbending state, and the roll Creates a uniform press force distribution over the entire width.

〔Example〕

FIG. 1 is a longitudinal sectional view of a squeeze roll according to the present invention, and FIG. 2 is a partial longitudinal sectional view of an elastically deformed portion of a cylindrical tube. Note that the same constituent members as those of the conventional squeezing roll described above are designated by the same reference numerals, and a detailed explanation will be omitted.

As seen in these drawings, the squeeze roll according to the present invention has a support shaft 1 rotatably supported by fitting spherical roller bearings 13 at both ends.
, a cylindrical tube 2 fixed concentrically to the support shaft 1 at the central portion in the longitudinal direction, and a rubber covering layer 3 adhered to the outer peripheral surface of the cylindrical tube. ing. The cylindrical tube 2 has a bellows-like elastic deformation portion with a longitudinal section in a wave-like shape (see FIG. 2) for a predetermined length from the outer end 2b of the fixed region with the support shaft 1 toward the side end 2c. Form 2e. This elastic deformation portion 2e is formed by wave-shaped grooves cut into the inner and outer circumferences of the cylindrical tube 2. Depending on the depth and pitch dimensions of this waveform, the apparent moment of inertia of the cylindrical tube 2 can be freely designed to be small, but the proof stress (ability to prevent flattening deformation due to bending) during pressurization can be adjusted appropriately. In order to maintain this value, the moment of inertia of area is usually designed to be about a fraction of the moment of inertia of a steel pipe without corrugated grooves. The cylindrical tube 2 having the bellows-shaped elastic deformation portion 2e thus formed and the coating layer 3 are joined into an integral structure, and the inner circumferential surface 2d of the cylindrical tube 2 and the outer circumferential surface of the support shaft 1 are bonded together. Covering layer 3 and cylindrical tube 2 while maintaining a predetermined distance between it and 1a.
is fixed concentrically to the support shaft.

As shown in FIG. 2, the coating layer 3 includes a soft rubber surface layer 3a having a uniform thickness, and a soft rubber layer bonded to the surface including the corrugated surface 2a of the cylindrical tube 2 via an adhesive (not shown). Alternatively, it is molded as an integral structure with the inner layer 3c made of synthetic resin. The surface layer 3a is made of soft rubber with a uniform thickness in order to provide a uniform squeezing effect over the entire width direction, but may be omitted in some cases.

Next, an embodiment in which the squeeze roll of the present invention is provided with a deflection adjustment mechanism will be described in detail with reference to the drawings.

In a preferred embodiment of the present invention, as shown in FIG. Wear it freely.

A concave conical guide portion 7 is formed on the inner surface of both ends of the cylindrical tube 2 and is slidably engaged with the conical head portion 4 .

The sliding body 5 is fitted into pressure cylinders 8 fixed to both ends of the support shaft 1, forming a pressure space 9 therebetween. 15, 16, and 17 are seal members for maintaining airtightness.

The pressure space 9 communicates with a groove 10 passing through both ends of the shaft, and a rotary joint 11 is screwed onto both ends of the support shaft 1.
It is connected to the pressure pipe 12 via.

Both ends of the support shaft 1 are supported by spherical roller bearings 13.

Now, the length (l) of the fixed portion between the support shaft 1 and the cylindrical tube 2 is set to l<a, so that the bending line of the cylindrical tube 2 becomes as shown by the line C in the sixth figure.

That is, the design is such that the pressure distribution on the coating layer 3 is stronger at the center than at both ends in a pressurized state.

Next, the effect when the squeeze roll configured as described above is pressed downward against the mating roll 14 will be explained.

As shown in FIG. 3, when the squeeze roll is pressurized downward through the bearing 13 against the mating roll 14 (a roll having the same structure as the upper part of FIG. 1), the center line L of the support shaft 1 is The center line M of the cylindrical tube 2 is deflected downward along the line D in FIG. 6, and the center line M of the cylindrical tube 2 is deflected upward along the line C in FIG.

Therefore, at both ends of the roll, the center lines L and M are slightly deviated from the center axis and separated from each other. In this state, air pressure (or oil pressure) is not yet working in the space 9 inside the pressurized cylinder 8, and the aperture effect is reduced to a strong central aperture due to the large bending deformation of the elastically deformed portion 2e of the cylindrical tube 2. in a state.

Here, when air pressure is applied from the pressure pipe 12, the air pressure P in the pressure space 9 increases as the pressure air is introduced through the rotary joint 11 and the groove 10, and the sliding body 5 1 , the conical head 4 joins the concave conical guide 7 . At this time, as shown in FIG. 3, since the respective center lines L and M are slightly deviated, the sliding body 5 and the concave conical guide part 7 are joined only at the lower joining point E. However, a void will be created on the upper side.

Therefore, the pressure P is applied to the lower contact point E of both end guide portions 7.
A bonding force F proportional to is applied substantially downward, pushing both ends of the cylindrical tube 2 downward, and the line of flexure changes from the state of line C to the state of line A in FIG.

That is, when the air pressure P reaches a certain appropriate pressure Po, the deflection line of the roll becomes as shown in the line A in Figure 6 due to the elastic deformation of the elastic deformation portion 2e, and uniform force is applied over the entire width of the roll. Pressure distribution can be obtained.

Then, when the air pressure P is further increased to more than Po, the sliding body 5 is further pushed in, and based on this, the amount of elastic deformation of the elastic deformation portion 2e further increases, and the line of flexure of the cylindrical tube 2 is changed as shown in FIG. As it approaches line B, the aperture ratio tends to be apertured at both ends.

In this case, when the squeeze roll is stationary, the conical head 4 is connected to the concave conical guide part 7 in a wedge shape, so that the sliding movement of the sliding body 5 in and out is prevented. It is not smooth and has poor resilience.

However, while the squeeze roll is rotating, the effective circumference at the junction E of the conical head 4 is slightly smaller than that of the guide part, so the junction E is in rolling contact. At the same time, the sliding body 5 rotates slightly differentially around the support shaft 1, and all the sliding resistance at the junction E, the needle bearing 6, the pressure cylinder 8, etc. is reduced to rotation. As a result, the sliding body 5 can move in and out smoothly.

In such a rotating state, the bonding force F acts on the bonding point E in perfect proportion to the air pressure P, ensuring restorability.

In this way, the line of deflection of the squeezing roll can be freely changed by adjusting the air pressure P, the length of the forming section of the elastic deformation portion 2e, and the dimensions of the corrugation. Further, in the above embodiment, a pressurized cylinder 8 is provided as a thrust applying means and pneumatic pressure or hydraulic pressure is used, but instead of this, a thrust applying means using elasticity such as a spring may also be adopted. .

Note that the amount of deflection of the squeeze roll can be increased by simply reducing the thickness of the cylindrical tube 2, but this method tends to flatten the cross section of the squeeze roll, making it difficult to apply the necessary pressing force. It becomes difficult to do so, and it becomes impossible to function as a squeezing roll. On the other hand, in the squeeze roll of the present invention, the length of the forming section of the elastically deformed portion 2e of the cylindrical tube 2,
In addition, by designing the height and arrangement pitch of the bellows-like corrugations formed in this part to suit the purpose of use, the amount of deflection can be increased without losing the practical strength as a squeeze roll. , can fulfill the intended function.

〔Effect of the invention〕

As can be understood from the above description, in the squeeze roll according to the first invention, by providing the cylindrical tube 2 with the wave-shaped elastic deformation portion 2e, the value of the apparent moment of inertia of the area can be reduced. Since it can be designed to be much smaller than conventional squeeze rolls, the amount of deflection in the escape direction at both ends of the roll is large when pressure is applied to the squeeze roll, making it possible to obtain a stronger center squeezing effect compared to conventional squeeze rolls. can.

The squeezing roll equipped with the deflection adjustment mechanism according to the second invention is assisted by the high flexibility of the elastically deformed portion 2e of the cylindrical tube 2, and can be adjusted from a strong center squeezing state to a strong both end squeezing state. It is possible to adjust the deflection over a wider range than with the squeeze roll, and it is possible to provide the ability to sufficiently deal with the above-mentioned problems of medium-dense and medium-darkness in dyeing.

Note that the elastic deformation portion 2e provided in the cylindrical tube 2
The shape is not limited to the illustrated embodiment, and can be implemented with numerous modifications within the scope of the idea of the present invention.

For example, the shape of the grooves cut into the inner and outer circumferences of the cylindrical tube 2 does not have to be a smooth sinusoidal shape as shown in the figure, but may be angular or triangular. Furthermore, the pitches of the waveforms do not necessarily have to be equally spaced, and may be provided irregularly.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a squeeze roll according to the present invention, and FIG. 2 is a partially enlarged longitudinal sectional view of an elastically deformed portion of a cylindrical tube. FIG. 3 is a partial longitudinal cross-sectional view showing the structure of both ends of the squeeze roll according to the present invention in a pressurized state, and FIG. 4 is a cross-sectional view showing the squeeze roll in a pressurized state. Further, FIG. 5 is a longitudinal cross-sectional view of a conventional pressure equalizing squeeze roll, and FIG. 6 is an enlarged line diagram showing the deflection line of the squeeze roll. DESCRIPTION OF SYMBOLS 1... Support shaft, 2... Cylindrical tube, 2e... Elastic deformation part, 3... Covering layer, 4... Conical head, 5
...Sliding body, 7 ... Concave conical guide section, 8 ... Pressure cylinder.

Claims (1)

[Scope of Claims] 1. A support shaft rotatably supported at both ends, a cylindrical tube fixed concentrically to the support shaft at its longitudinal center, and the cylindrical tube In a squeeze roll consisting of a coating layer fixed to the outer circumferential surface,
A squeezing roll characterized in that an elastic deformation portion having a corrugated longitudinal cross section is formed on the cylindrical tube for a predetermined length from the outer end of the fixed region between the support shaft and the cylindrical tube toward the side end of the cylindrical tube. . 2. A support shaft rotatably supported at both ends, a cylindrical tube fixed concentrically to the support shaft at its longitudinal center, and a cylindrical tube fixed to the outer peripheral surface of the cylindrical tube. In the squeeze roll consisting of a coating layer,
Forming an elastic deformation portion having a wave-shaped longitudinal cross section on the cylindrical tube for a predetermined length from the outer end of the fixed region between the support shaft and the cylindrical tube toward the side end of the cylindrical tube, , a sliding body having a conical head is rotatably and slidably mounted on the support shaft, and the conical head of the sliding body is slidably engaged with the inner surface of both ends of the cylindrical tube. A concave conical guide portion is formed at both ends of the support shaft, and the conical head of the slide body and the concave conical guide portion of the cylindrical tube engage each other in the axial direction of the support shaft. A squeezing roll characterized by being provided with a thrust mechanism that applies thrust along the direction of mating.