JPH0453996Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an embossing roll, and in particular, the invention relates to an embossing roll, in particular, a sleeve body for forming an embossed surface (uneven pattern, etc.) on a building or furniture, etc., relative to a roll axis. This invention relates to a new improvement for easy attachment and detachment.

[Conventional technology] Conventionally, many products such as paper, leather, vinyl, thin metal sheets, or plasterboard have been used as interior materials, exterior wall materials, or furniture furnishings for buildings, which have been subjected to an embossed (uneven pattern) process. It is used.

This embossing process is partially performed using a press, but generally it is manufactured using an embossing rolling machine that transfers and molds the pattern engraved on the roll surface onto various materials.

In addition, in the above-mentioned embossing rolling process, there are two types of embossing: one-sided embossing in which an engraving roll is used for only one of the upper and lower rolls, and double-sided embossing in which engraving rolls are used for both rolls, but in recent years, Double-sided embossing with deep carvings and high design is increasing.

In particular, in the above-mentioned double-sided embossing process, the material to be processed (paper, vinyl, leather, thin metal sheet, etc.) is charged between a pair of upper and lower engraved rolls and pressurized, thereby eliminating the unevenness of each roll. A processed product is obtained with a pattern transferred depending on the depth.

Next, the conventional examples shown in FIGS. 3 to 6 are typical ones that have been used up to now, and FIGS. 3 and 4 are the first conventional example, and FIG. 5 is the first conventional example. 2 is a conventional example, and FIG. 6 is a third conventional example.

First, in the case of the first conventional example shown in FIG. 3 and FIG. 3 are integrally formed, and a required embossed pattern (not shown) is formed on each of these roll portions 3.

Moreover, in the conventional example shown in FIG. The sleeve body 4 is fitted by shrink fitting, and an embossed surface 4a with a desired pattern is formed on the surface of the sleeve body 4.

Furthermore, in the conventional example shown in FIG. 6, the roll 1 (or 1A) is connected to the roll shaft 2 and the sleeve body 4.
The large-diameter fitting portion 2a formed at the center of the roll shaft 2 has a flange portion 4 on its end surface.
The sleeve body 4 having a diameter of 1.a is fitted, and the flange portion 4a is integrally fixed to the fitting portion 2a via mounting screws 5. Furthermore, an embossed surface 4a having a desired pattern is formed on the surface of the sleeve body 4.

[Problems to be solved by the invention] Since the conventional embossing roll was configured as described above, it had the following problems.

In other words, normally, in the case of double-sided embossing, slips on the upper and lower rolls not only impair the quality of the material to be processed, but also lead to damage to the engravings on the roll surface itself, which is never acceptable. The shaft has been extended to the outside of the housing, and a pattern matching gear for each roll has been installed. For this reason, the total length of each roll is approximately twice the length of the barrel (if the barrel is 1500 mm, the total length of the roll axis is 2800 mm), and the production cost of each roll is extremely expensive even excluding engraving costs. It was becoming.

In addition, as mentioned above, embossed products are mainly used for interior and exterior parts of buildings, furniture, etc.
In order to meet user needs, it is necessary to have a considerable number of designs, but especially the first one shown in Figure 3.
In the case of a monolithic structure like the conventional example, storage and management are extremely difficult, and even excluding engraving costs, roll material costs, processing costs, etc. increase, and small-lot, high-mix production is required. For embossing,
Having a large number of such rolls is an excessive burden, and has been a significant impediment to improving productivity.

In addition, in the case of the sleeve roll structure using the sleeve body shown in Figs. 5 and 6, the sleeve body to be engraved is processed from a tube formed by centrifugal casting, etc., thereby reducing material costs and weight. It can be made into a cylindrical shape that is easy to store, and the roll shaft can be compressed into a minimum of three sets by using the operating systems of pair operation, pair assembly, and pair maintenance.
Although the roll storage area can be significantly reduced, the method of fixing the sleeve body to the roll shaft has been a problem.

In other words, in embossing rolling, it depends on the strength of the material to be processed, but assuming a thick stainless steel plate with high tensile strength, the processing speed is 150 per millimeter.
Receives linear pressure of about 1 kg. Therefore, the fixed structure must be able to sufficiently handle this processing load and have a fitting force sufficient to transmit the torque to rotate the roll, and the fixed structure must allow for frequent attachment and detachment of the sleeve body. It is an essential requirement.

Therefore, in the case of the shrink-fitting structure shown in FIG. 5, it is easy to fit the sleeve body, but it is extremely difficult to remove the sleeve body from the roll shaft, and the sleeve body is deformed when detached. There is also a large risk of damage, and the structure cannot be adopted for embossing rolls that are intended to be used with the sleeve body being frequently attached and detached.

In addition, in the case of the bolted structure shown in Fig. 6, the sleeve body can be easily attached and detached, but excessive radial load is applied to the mounting bolts that fix the sleeve body, resulting in damage to the mounting bolts or slipping between the roll shaft and the sleeve body. The quality of rolled products deteriorated due to problems such as the occurrence of

In addition to the conventional example described above, although not shown,
A configuration in which the key is fixed via the keyway of the roll shaft is also considered, but in this configuration, repeated stress is applied to the side of the key, causing the key to wear out quickly. Backlash occurred, and the patterns on the upper and lower rolls did not match, resulting in significant damage to the engraving.

The present invention was developed to solve the above-mentioned problems, and in particular, the sleeve body for forming embossed surfaces (irregular patterns, etc.) on buildings or furniture can be easily attached to the roll axis. An object of the present invention is to provide an embossing roll that is detachable.

[Means for Solving the Problems] The embossing roll according to the present invention has a sleeve body having an embossed surface fitted to the fitting portion of the roll shaft. A sealed chamber is created between the roll shaft and the sleeve body by a roll taper surface, a sleeve taper surface formed on the inner peripheral surface of the sleeve body and having the same slope as the roll taper surface, and an O-ring provided at both ends of the sleeve body. This configuration includes a roll shaft that forms an oil passageway for sending high-pressure hydraulic oil into the sealed chamber.

[Function] In the embossing roll according to the present invention, by supplying high-pressure hydraulic oil into the sealed chamber formed between the roll shaft and the tapered surface of the roll and the tapered sleeve of the sleeve body, the pressure of this high-pressure hydraulic oil can be adjusted. As a result, the sleeve body expands.

Due to this expansion, the gap between the sleeve body and the roll shaft increases, and the sleeve body can be pushed toward the larger diameter side of the roll shaft.

When the above operations are performed until the pressure reaches a predetermined tightening margin and the pressure of the hydraulic oil is lowered, the sleeve body no longer expands and is integrally tightened to the roll shaft at a predetermined pressure.

Next, when removing the sleeve body from the roll shaft, high-pressure hydraulic oil is supplied into the sealed chamber again in the same way as when inserting the sleeve body, and the sleeve body expands.
A gap is formed between the roll shaft and the sleeve body,
The sleeve body can be easily removed from the roll axis by applying a slight force.

[Examples] Hereinafter, preferred embodiments of the embossing roll according to the present invention will be described with reference to the drawings.

Note that the same reference numerals are used to describe the same or equivalent parts as in the conventional example.

1 and 2 are a sectional view and a side view of an embossing roll according to the present invention.

In the figure, the reference numeral 1 indicates an upper roll, and a lower roll 1A is disposed in a vertical relationship with the upper roll 1.

Each of these rolls 1 and 1A consists of a longitudinal roll shaft 2 and a sleeve body 4, and the sleeve body 4 is pushed into a large-diameter fitting portion 2a formed at the center of the roll shaft 2. In addition to being fitted together, an embossed surface 4a with a desired pattern is formed on the surface of the sleeve body 4.

A roll tapered surface 6 having a slope of α in the roll shaft diameter in the axial direction of the roll shaft 2 is formed on the outer circumferential surface of the fitting portion 2a of the roll shaft 2, and the outer circumferential surface of the fitting portion 2a has a conical shape. It forms part of the shape.

A sleeve tapered surface 7 having the same slope as the roll tapered surface 6 is formed on the inner circumferential surface of the sleeve body 4. By joining this roll tapered surface 6 and the sleeve tapered surface 7, the sleeve body 4
is fitted onto the outer peripheral surface of the fitting portion 2a.

Seal bodies 8 made of O-rings held in ring grooves (not shown) are provided at both ends of the sleeve body 4.
The seal body 8 forms a closed chamber 9 having a cylindrical shape and having a small gap between the sleeve body 4 and the fitting portion 2a.

An oil passage 10 for supplying high-pressure hydraulic oil into the sealed chamber 9 is formed in the roll shaft 2, and the oil passage 10 is configured to be supplied with high-pressure hydraulic oil by a hydraulic device (not shown). be.

The embossing roll according to the present invention is constructed as described above, and its operation will be described below.

First, the large diameter side 4b of the sleeve body 4 is connected to the fitting part 2a.
Insert it from the small diameter side 2aA, push it lightly along the roll tapered surface 6, and then supply high pressure hydraulic oil into the sealed chamber 9 through the oil path to increase the pressure. increases, and the sleeve body 4 expands due to the pressure. This expansion enlarges the gap between the fitting part 2a of the roll shaft 2 and the sleeve body 4, that is, the sealed chamber 9, and further pushes the sleeve body 4 toward the large diameter side 2aB of the fitting part 2a.
The above operations are continued until the planned tightness is reached.

As shown in FIG. 1, when the pressure of the high-pressure hydraulic oil is lowered when the sleeve body 4 reaches a predetermined position on the fitting part 2a, the expansion of the sleeve body 4 is completed and it returns to its original shape. Therefore, the sleeve body 4 is fitted onto the roll shaft 2 with a predetermined stress generated, and the work is completed.

Next, when the sleeve body 4 is removed from the roll shaft 2, the high pressure hydraulic oil is again forced into the sealed chamber 9 through the oil passage 10, and the sleeve body 4 is removed from the roll shaft 2.
expands again, the gap between the fitting part 2a and the sleeve body 4 becomes large, the fitting between the sleeve body 4 and the fitting part 2a is released, and a force is applied in the direction of pulling out along the roll tapered surface 6. act. This force is applied to the sleeve body 4
This is caused by the difference in cross-sectional area between the small diameter side and the large diameter side, and is equal to the value obtained by multiplying this area difference by the hydraulic pressure. This force is much larger than the frictional force.
Therefore, the sleeve body 4 can be removed very easily.

Further, the roll tapered surface 6 and the sleeve tapered surface 7 described above are extremely important in order to obtain sufficient tightening force when the sleeve body 4 is fitted and to be able to easily detach it.

That is, if these tapered surfaces 6 and 7 are too large, the load in the axial direction becomes excessive during fitting, and the difference in the wall thickness of the sleeve body 4 in the axial direction becomes large, resulting in a large difference in the tightening force. occurs.

On the other hand, if the slopes of the tapered surfaces 6 and 7 are too small, the movement distance of the sleeve body 4 will become longer if an expansion allowance is given to obtain the necessary tightening force, and as a result, the fitting of the roll shaft 2 will be delayed. It becomes necessary to make the length of the portion 2a significantly larger than the length of the sleeve body 4. Therefore, it has been confirmed that the slope of these tapered surfaces 6 and 7 is optimally 1/200 to 1/50.

Moreover, if the thickness of the sleeve body 4 is too large,
The lightweight effect of the sleeve body 4 is lost, and the purpose of the present invention, which is to prepare and freely select sleeve bodies 4 for various types, is not achieved, and in order to obtain the required expansion of the sleeve body 4, it is extremely large. Hydraulic pressure is required.

Furthermore, if the wall thickness of the sleeve body 4 is too small, a large amount of stress is required to be applied to the sleeve body 4 in order to obtain the necessary tightening force, and as a result, the distortion of the sleeve body 4 becomes large and the embossing occurs. A change occurs in the shape. Therefore, it is best that the thickness of the sleeve body 4 is in the range of 10 to 50 mm.

It should be noted that the sleeve body 4 used in the present invention can be made by cutting solid cast steel or solid forged steel into a cylindrical shape.
From the viewpoint of ease of processing, it is optimal to use hollow steel manufactured by centrifugal casting.

Next, an actual example of using the embossing roll according to the present invention will be described.

Embossing roll Length of fitting part 2a of roll shaft 2: 1200 mm Roll diameter: 450 mm Outer diameter of sleeve body 4: 450 mm Length of sleeve body 4: 1160 mm Wall thickness of sleeve body 4: 20 mm (thin wall) (side) Average wall thickness: approx. 23 mm Gradient of sleeve tapered surface 7: 1/100 Transmission torque required for embossing: 1200 Kg・m Pressure force of upper and lower rolls required for embossing: 100000 Kg is added. Therefore, the tightening force to fix the sleeve body 4 of the embossing roll and the roll shaft 2 needs to be greater than this.

For example, if the transmitted torque due to the tightening force between the roll shaft 2 and the sleeve body 4 is T=P・e〓〓, where T: required torque P: circumferential tightening force e: natural coefficient μ : Coefficient of friction between the roll shaft and sleeve body θ : Contact angle The tightening force required in the circumferential direction is approximately 5000 kg.

Also, since the sleeve body 4 is thin, if we approximate the stress to be uniform both inside and outside, the internal stress to be generated in the sleeve body 4 is P=Aσ, where P: Tightening force A: Circumference of the sleeve body 4 Total cross-sectional area in the direction σ: Stress, σ≒0.8Kg/mm ² .

However, since a pressing force of 100 kg/mm acts on the sleeve body 4 per unit of axial length,
It is necessary to maintain the tightening force beyond this force.
Assuming that the stress due to this pressure is 5Kg/ ^mm2 , it is sufficient to generate σ of 10Kg/ ^mm2 for safety, and the strain rate required for this is, from ε=σ/E, =10/21000=1/ 2100 However, ε: Strain rate E: Longitudinal elastic modulus σ: Stress. If the diameter of the fitted part is 400 mm, the strain rate (tightening margin) will be 400 x 1/2100 = 0.19 mm.

Next, the pressure of the hydraulic oil to generate this interference is a stress of 10 kg/mm ² on the cross section of the sleeve body 4 in the width direction.
It is sufficient to generate the following, so from K=2a×σp/D, =2×230×10/40≒110Kg/cm ² However, K: Hydraulic pressure a: Cross-sectional area per width and length σp: Required stress D : Inner diameter of the sleeve body From the above formula, 110
It is sufficient to apply hydraulic pressure of Kg/cm ² or more.

In the actual embodiment, the sleeve body 4 is fitted with a hydraulic pressure of 100 kg/cm ² and separated with a hydraulic pressure of 115 kg/cm ² . This seems to be because force was applied in the axial direction by the screw jack when pushing the sleeve body 4 during fitting.

In addition, the operation time required to perform the above-mentioned work was approximately 10 minutes for fitting and approximately 5 minutes for disconnection, including the installation of the attachment/detachment jig.

[Effects of the invention] Since the embossing roll according to the invention is configured as described above, the following effects can be obtained.

In other words, it is possible to supply high-pressure hydraulic oil into the sealed chamber formed between the fitting part of the roll shaft and the sleeve body through the tapered surface with a predetermined slope, compared to the conventional attachment/detachment structure. , the time required for attachment and detachment can be greatly shortened, and the roll shaft and sleeve body can be safely and quickly attached and detached with almost no damage.

In addition, the above-mentioned effects make it possible to replace the sleeve body in accordance with high-mix, low-volume production, and it is possible to extremely easily meet the various embossing needs of users.

[Brief explanation of the drawing]

Figures 1 and 2 show the embossing roll according to the present invention, with Figure 1 being a sectional view, Figure 2 being a right side view of Figure 1, and Figures 3 to 6 showing the conventional configuration. Figure 3 is a front view, Figure 4 is a sectional view taken along line A-A' in Figure 3, Figures 5 and 6 are for
The figure is a sectional view. 1 is an upper roll, 1A is a lower roll, 2 is a roll shaft, 2a is a fitting part, 4 is a sleeve body, 4a is an embossed surface, 6 is a roll taper surface, 7 is a sleeve taper surface, 8 is a seal body, 9 is a A closed chamber, 10 is an oil passage.

Claims (1)

[Claims for Utility Model Registration] (1) In an embossing roll in which a sleeve body having an embossed surface is fitted to a fitting portion of a roll shaft, a roll tapered surface formed at the fitting portion of the roll shaft; forming a sealed chamber between the roll shaft and the sleeve body by a sleeve taper surface formed on the inner circumferential surface of the sleeve body and having the same slope as the roll taper surface and seal bodies provided at both ends of the sleeve body; An embossing roll characterized in that the sleeve body can be expanded by sending high-pressure hydraulic oil into the sealed chamber from an oil passage formed in the roll shaft. (2) The embossing roll according to claim 1, wherein the taper amount provided at the fitting portion of the roll shaft and the sleeve body is in the range of 1/200 to 1/50. (3) The embossing roll according to claim 1 or 2, wherein the sleeve body has a maximum wall thickness of 50 mm or less. (4) The embossing roll according to any one of claims 1 to 3, wherein the sleeve body is constructed by centrifugal casting.