JP2005511173A - Rotating irona - Google Patents

Abstract

  At least one substantially horizontally disposed ironing roller having a cylindrical surface and rotatably supported about an axis of rotation through a center, each of the rollers having two ends and An ironing pan comprising a cylindrical yoke formed between two ends is provided, and the yoke is disposed so as to surround a part of the circumference of the roller over almost the entire length. The feed side that pushes into the abutment area between the roller and pan by rotation of the roll, and the discharge side opposite the feed side that pushes the piece of cloth again out of the roller, the pan being essentially two flexible It consists of rectangular steel plates that are spaced apart from each other, except that they are tightly joined along their perimeter to form a hollow flexible pan that can fit into the cylindrical surface of the roller, and the steam Bread In order to supply to the cavity, one or more supply pipes are provided integrally with the pan at one or more positions along the rotation axis of the roller of the pan. The integrated supply pipe at each position is configured as a separable pipe, and the removable supply flange / stub for connecting the steam supply pipe to the integrated supply pipe is provided at the integrated supply pipe at each position.

Description

  The present invention relates to a rotary ironer for ironing a piece of cloth, in particular a substantially rectangular piece of cloth such as bed linen or tablecloth. The rotary ironer includes an ironing roller having at least one substantially horizontally disposed and rotatably supported two ends, and the ironing roller has a part of the periphery of the ironing roller substantially the entire length. An ironing pan that surrounds is provided. The ironing roller and the ironing pan have a supply side for pushing the cloth piece into the contact area between the ironing roller and the ironing pan by the ironing roller, and a discharge side opposite to the supply side for pushing the cloth piece again from the ironing roller. Yes.

  Conventionally, this type of rotary ironer is often provided with a highly rigid and inflexible ironing pan having a very large material thickness. Most of these rotating irons are heated by condensed steam, but a stiff ironing pan can easily withstand the super-atmospheric pressure of the steam supplied to the ironing pan to obtain a predetermined ironing temperature. ing.

  One problem with these conventional ironing pans is that when using the ironing pan, even if there are very slight irregularities on the surface facing the ironing roller, the friction piece is changed to make the cloth piece as good as possible. And it is in the point which brings an unfavorable result to a rotary ironer from a viewpoint of ironing with high reliability. Therefore, when producing an inflexible ironing pan according to the prior art, it is necessary to machine the ironing pan with high rigidity and inflexibility many times in order to make it fit well with the ironing roller. However, these rotary ironers are very stable in the dimensions of a fully machined ironing pan, so they have the freedom to place other components in the rotary ironer without changing the state of friction. There is an advantage that it can be increased.

  In addition, a highly rigid pan has the problem of expanding as pressure and temperature increase. This means that the contact pressure between the roller and the pan decreases over the entire surface due to this expansion. Contact pressure is very important for the drying capacity of the rotary ironer, where the thermal energy is further increased by increasing the temperature gradient, but the drying capacity is increased by the heat and pressure expansion of the rigid pan. Rather, it means to decline. A similar phenomenon occurs when the roller diameter decreases due to wear of the rotating irona felt coating.

  In order to eliminate the above-mentioned drawbacks of the technology, a steam-heated ironing pan has been devised that has increased flexibility and can be elastically adapted to the contour of the ironing roller.

  Examples of such ironing pans are suggested in European Patent No. 573,402, German Patent Application No. 197577756, and US Pat. No. 3,118,240. In these examples, the ironing pan is composed of two substantially rectangular steel plates, which are tightly joined at a number of joints in the periphery and in the area surrounded by the periphery. The others are separated from each other. Therefore, by combining these two steel plates as described above, a flexible hollow ironing pan can be obtained. In addition, one or more supply tubes are integrated into the ironing pan location corresponding to each end of the ironing roller for supplying steam to the cavity of the ironing pan.

  With respect to the latter configuration of the rotary ironer, techniques for supplying steam via a tube system are known. The tube system is joined to the ironing pan by welding and extends in the longitudinal direction of the ironing pan and the ironing roller from a connecting flange / stub on one end of the ironing roller. In order to relieve these tube systems from deforming (shrinking) flexible ironing pans due to thermal expansion and contraction of the tube members, these tube systems have one or more relaxation regions, specifically increasing their elasticity. Specifically, a bending portion is provided, and the bending portion can deform the tube system by the same principle as that of the harmonica.

  However, another problem that arises in flexible ironing pans with the latter tube system heated by condensed steam is that the pressurized steam is ironed to heat the surface of the ironing pan to a predetermined temperature. It is necessary to feed bread. This means that, in principle, the ironing pan is considered to be a pressurized container, which means that safety must be considered when assembling the ironing pan.

  Accordingly, an object of the present invention is to provide a rotary ironer and an ironing pan capable of improving safety when other conditions are the same, and at the same time eliminating or reducing the load of the tube system on the ironing pan. .

  According to the present invention, the above-described object is to provide a detachable connecting flange for connecting an integrated supply tube to a steam supply tube by providing an integrated supply tube configured as a separable tube member at each position of the ironing pan. This can be achieved by providing a stub in the integrated supply tube at each location.

  Unlike the configuration of the supply tube attached by welding so as to extend along the whole of the ironing pan, the integrated steam supply tube described above is located at a distance from the ironing pan at each position in the longitudinal direction of the ironing roller. The force resulting from the thermal expansion and contraction by these tubes is not transmitted to the ironing pan. At the same time, the total volume of the tube system can be significantly reduced, especially compared to the prior art configuration where the relaxation zone is additionally provided by welding to the ironing pan, and safety is improved if the other conditions are the same. Can be increased. The safety of the pressurized container is usually calculated as a value obtained by multiplying the total volume of the container by the pressure applied to the container.

  According to a preferred embodiment, the integrated steam supply tube may be arranged only at the center of the ironing pan, especially along the axis of rotation of the ironing roller.

  According to a preferred modification, these supply tubes may be arranged only at each end of the ironing pan. Also, in this variant, it is possible to further reduce the overall container volume of the ironing pan by providing a connecting flange / stub at each end of the ironing roller and thus the ironing pan.

  According to still another preferred embodiment, when the rotary ironer is used, the steel plate on the side facing the ironing roller may be made of black steel or ferritic steel. This arrangement makes it possible to lower the vapor pressure when the other conditions are the same, in particular when using stainless steel as known from German Patent Application No. 197577756 and European Patent No. 573402. Black steel or ferritic steel typically has a conductivity four times higher than stainless steel.

  In this embodiment, the two steel plates constituting the ironing pan are made of black steel or ferritic steel, thereby further avoiding undesirable deformation of the ironing pan due to the difference in thermal expansion coefficient of the steel plates. Other advantages are obtained.

  According to yet another preferred embodiment of the invention, the steel plate facing the rotary ironer in use has a material thickness in the range of 2 to 6 mm, preferably in the range of 3 to 5 mm. Good. On the other hand, the steel plate on the side opposite to the side facing the rotary ironer during use may have a material thickness in the range of 0.75 to 2 mm, preferably in the range of 1 to 1.5 mm. Therefore, the surface of the rotary ironer can be manufactured very easily using a conventional welding process without further processing, and the friction and contact pressure between the ironing pan and the cloth piece pushed into the rotary ironer are reduced. A highly flexible ironing pan can be obtained which can be increased by the contact of the rotating ironing roller with the ironing pan.

  Further, the ironing pan may further include one or more discharge pipes that collect and discharge condensed vapor from the inside thereof. By providing such a discharge pipe at the bottom of the ironing pan during normal use, such a discharge pipe will be placed in a curved area of the ironing pan and thus in a relatively rigid area. This means that the reduction of the effect of the discharge pipe on the ironing pan need not be taken into account.

  In a preferred embodiment, the integrated supply pipe may be attached to each corner of a rectangular steel plate constituting the ironing pan so as to be in fluid communication. According to this configuration, steam is supplied to each end of the uppermost ironing pan of the rotary ironer during normal use. Therefore, the heat distribution on the surface of the ironing pan is maintained well.

  Furthermore, in this embodiment, preferably two integrated supply pipes arranged at least at one end of the ironing pan may extend downward from the ironing pan. With this configuration, the impact applied to the ironing pan by the integrated supply pipe can be further reduced.

  If the connecting flange / stub that removably connects the steam supply pipe to the integrated supply pipe is provided on the two integrated supply pipes at one end of the rotary ironer, the influence of the integrated supply pipe on the ironing pan is further reduced. It becomes possible.

  According to still another preferred embodiment of the present invention, the integrated supply pipe at one end of the ironing pan is detachable into one or more steam supply pipes extending to the other end along the longitudinal direction of the ironing pan. It may be connected. With this configuration, the ironing pan can be easily connected to an existing steam supply plant at one end of the rotary ironer.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic front view of an ironing pan. This ironing pan includes a frame portion 1, and an ironing roller 2 is provided on the frame portion 1. The ironing roller 2 can be rotated around the shaft 4 via a gear 18 by a motor (not shown). As in the conventional method, an ironing pan 5 is provided directly below the ironing roller, and a supply pipe 6 is attached to each end of the ironing pan 5. According to the present invention, the two supply pipes 6 shown are separated from each other without being connected to each other, and each supply pipe 6 is provided with a mounting flange 8 for mounting to the steam supply pipe 7. The figure shows only a part of these.

  As shown above, the supply pipe 6 shown in the figure is spaced apart from the two opposing ends of the ironing pan 5, so that the supply iron 6 is connected to the rotary ironer with the supply of steam as compared with the conventional rotary ironer. Even if an impact is applied, it is possible to reduce such an impact as much as possible, and to reduce the risk that the elastic ironing pan is deformed inadvertently.

  FIG. 2 is a cross-sectional view of the ironing roller 2 including the ironing pan 5 cut along the line AA in FIG.

  The ironing roller 2 rotates around the center D formed by the shaft 4 shown in FIG. 1 along the rotation direction indicated by the arrow C, so that the ironing roller 2 and the ironing pan 5 put the cloth piece between them. A feeding gap 9 to be introduced is provided, and the introduced cloth piece is transferred between the ironing roller 2 and the ironing pan toward the outlet opening 10.

  FIG. 2 shows a state where the supply pipe 6 shown in FIG. 1 is provided at both the inlet 9 and the outlet 10. The pressurized steam is supplied to the ironing pan 5 through a supply pipe 6 connected to a steam supply pipe (not shown) by a connection flange or stub 8 shown in the figure.

  As is apparent from FIG. 2, the ironing pan 5 constitutes a yoke (frame portion) on which the ironing roller 2 is placed, and in the same way as in a known method, the inlet 9 that forms the upper region during normal use. And is suspended between the outlets 10. Further, FIG. 2 shows a state in which the discharge pipe 11 is provided in the ironing pan 5 as shown in detail in FIG. As shown in the figure, the discharge pipe 11 is provided with a detachable connecting flange or stub 12.

  FIG. 3 is a diagram showing the ironing pan 5 shown in FIGS. 1 and 2 in a developed state. The illustrated ironing pan 5 is comprised of two substantially rectangular plates connected by welding, as shown in more detail in FIG. 4, which plate has an inlet edge 9a and an outlet edge 10a at each end. It has an edge 14. Further, as is apparent from FIG. 3, a pipe bending portion 13 is formed in the discharge pipe 11 as in the conventional method. These pipe bent portions 13 are bent so as to reduce the influence of the discharge pipe 11 on the ironing pan 5 when various expansions and contractions occur due to the thermal expansion coefficient of the pipe material.

  According to the present invention, the discharge pipe can be configured as two separable pipes attached to a detachable connecting flange or stub similar to that connected to the supply pipe 6. However, in the illustrated preferred embodiment, the ironing pan region in which the discharge pipe 11 is provided has a relatively high rigidity due to its curved shape, so this modification is not applied.

  4 shows the ironing pan 5 in the unfolded state of FIG. 3 in which the supply pipe 6 and the discharge pipe 11 are omitted. As shown in the figure, the two plates are joined to each other by face-to-face welding at all points 15, the two end edges 14, and the periphery consisting of the entrance edge 9a and the exit edge 10a.

  Further, FIG. 4 shows a supply opening 16 that forms a passage through which steam flows from the supply pipe 6 to the inside of the ironing pan 5, and a discharge opening 17 that forms a passage through which steam flows from the inside of the ironing pan 5 to the discharge pipe 11. Is shown.

  FIG. 5 which is the final drawing is a detailed sectional view of the ironing pan 5 shown in FIG. As shown in the figure, the two plates joined by welding are in contact with each other via the two welding regions described above, and between these welding regions, steam is supplied over the entire surface of the ironing pan. A flow path that circulates from 16 to the discharge opening 17 is formed. This configuration can also be achieved by preforming one of the two plates, but preferably a strong fluid pressure higher than atmospheric pressure is applied between the two plates after joining by welding. By adding, it is good that the flow path is formed.

1 is a schematic front view of a rotary ironer according to the present invention. It is a schematic sectional drawing in alignment with line AA of FIG. It is the schematic which looked at the developed state of the ironing pan shown to FIG. 1 and FIG. 2 to which the supply pipe and the discharge pipe are attached by welding from the outside. It is the schematic which shows the welding spot of the ironing pan of FIG. It is sectional drawing of the ironing pan of FIG.

Claims (12)

Rotating ironers comprising at least one substantially horizontally disposed, ironing roller having a cylindrical surface and rotatably supported about a rotation axis passing through a center, wherein each of the ironing rollers includes An ironing pan comprising two end portions and a cylindrical yoke formed between the two end portions is provided, and the yoke is disposed so as to surround a part of the periphery of the ironing roller over substantially the entire length, The roller and the ironing pan are opposite to the supply side that pushes the cloth piece into the contact area between the ironing roller and the ironing pan by the rotation of the ironing roller, and the supply side that pushes the cloth piece again from the ironing roller. The ironing pan has two flexible, substantially rectangular steel The steel plates are spaced apart from each other except to be tightly joined along their perimeter to form a hollow flexible ironing pan that can fit the cylindrical surface of the ironing roller, In order to supply the hollow of the ironing pan, one or more supply pipes are integrated with the ironing pan at one or more positions along the rotation axis of the ironing roller of the ironing pan. In the rotated rotating irona
The integrated supply pipe at each position of the ironing pan is configured as a separable pipe, and a detachable coupling flange / stub for connecting a steam supply pipe to the integrated supply pipe at the integrated supply pipe at each position. A rotary ironer characterized by being provided.   2. The rotary ironer according to claim 1, wherein the integrated steam supply pipe is provided substantially only at the center of the ironing pan along a rotation axis of the ironing roller.   2. The rotary ironer according to claim 1, wherein at least the integrated steam supply pipe is provided only at both ends of the ironing pan along a rotation axis of the ironing roller.   The rotary ironer according to claim 3, wherein the connecting flange / stub is provided at each end of the ironing pan.   The rotary ironer according to claim 1 or 2, wherein the steel plate on the side facing the ironing roller during use is made of black steel or ferritic steel.   The rotary ironer according to claim 5, wherein the two steel plates forming the ironing pan are made of black steel or ferritic steel.   The steel sheet on the side facing the ironing roller in use has a material thickness in the range of 2 to 6 mm, preferably in the range of 3 to 5 mm, and the side opposite to the side facing the ironing roller in use The steel sheet according to any one of the preceding claims, characterized in that it has a material thickness in the range of 0.75 to 2 mm, preferably in the range of 1 to 1.5 mm. Rotating irona.   The ironing pan further includes one or more discharge pipes for collecting and discharging condensed vapor from the inside thereof, and the one or more discharge pipes are in a lowermost region in a normal use state of the ironing pan. A rotary ironer according to any one of the preceding claims, characterized in that it is arranged.   The integrated supply pipe is attached to each corner of the rectangular steel plate constituting the ironing pan so as to be in fluid communication, so that steam is supplied to the uppermost end of the ironing pan. A rotary ironer according to any one of the preceding claims.   The rotary ironer according to claim 9, wherein at least one end of the ironing pan is provided with the two integrated supply pipes extending downwardly from the ironing pipe.   Each of the two integrated supply pipes at one end of the ironing pan is provided with a connecting stub / flange that removably connects a steam supply pipe to the integrated supply pipe. Item 11. A rotary ironer according to Item 10. One or more steam supply pipes extending toward the other end in the longitudinal direction of the ironing pan are detachably connected to the integrated supply pipe at one end of the ironing pan. The rotary ironer according to claim 10 or 11.

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