JP5759732B2 - Belt-type roll ironer - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a laundry ironing device (ironer), and more particularly to a belt-type roll ironer installed in a commercial laundry line for continuously washing, drying, ironing and folding linen products. is there.

  The belt-type roll ironer has one or a plurality of rotating heating rolls installed in the housing of the apparatus, and circulates while pressing the laundry against the cylinder circumferential surface of these heating rolls, and the laundry inlet to the outlet. A transport belt for transporting to the right. A conventional roll ironer uses steam as a heat source of a heating roll, and heats the cylinder surface by injecting steam into a hollow cylinder.

  Since the ironing temperature varies depending on the type of laundry, particularly the type of material fiber, it is necessary to control the surface temperature of the cylinder according to the type of laundry put into the apparatus. In a conventional belt-type roll ironer using steam as a heating source, the surface temperature of the cylinder is controlled according to the type of laundry by controlling the temperature of the steam supplied to the heating cylinder.

  On the other hand, as a heating roll provided in a paper machine or the like, a roll having an induction heating type cylinder is provided. The induction heating type roll has an electric coil (induction coil) arranged adjacent to the inner peripheral surface of the cylinder. By causing a high-frequency current to flow through the induction coil, an eddy current is generated in the cylinder. The cylinder is directly heated by the electric resistance of the current.

  Inductive heating rolls having various structures have been proposed. For example, Patent Document 1 discloses that an induction coil is divided into a plurality of groups in the axial direction of the cylinder, and a cylinder temperature sensor and a temperature are set for each group. There has been proposed an induction heating type roll which can provide a desired temperature distribution to a cylinder by providing a controller.

  Induction heating type rolls require a high-frequency power supply, but it is not necessary to provide a steam generator or steam piping, and it is not necessary to use a pressure-resistant structure for the cylinder. The weight can be reduced.

  However, in commercial laundry facilities, since a large amount of steam is used as a heat source for heating the washing liquid of the washing machine and drying air of the dryer, the roll ironer roll can be an induction heating type, Steam equipment is still necessary, and since a high-frequency generator is required in addition to steam equipment, the above effects cannot be obtained by adopting induction heating type rolls. The idea of using induction heating as a heating source for a roll ironer cylinder has never been born.

JP 2002-319477 A

  The problem with ironers equipped with steam-heated rolls is that ironing of waterproof linen products used in hospitals and care facilities is not possible. The ironing temperature of waterproof linen products is limited to about 80 ° C, but it is difficult to set the surface temperature of the cylinder below 100 ° C for steam heating type rolls. You can't iron.

  In addition, the ironer installed in the laundry line for business use does not have a constant interval for the laundry to be put into the apparatus, and a waiting time often occurs in relation to other devices constituting the laundry line. Although the size of the laundry and the ironing temperature vary depending on the type of laundry, there is a demand for ironing these various laundry appropriately and with low energy consumption.

  The present invention provides a belt-type roll ironer that can sufficiently exhibit the advantages of an induction heating type roll by solving the above-described problems required for an ironing device for a commercial laundry line. It is an issue.

  The belt-type roll ironer of the present invention is wound around one or a plurality of rotary heating rolls 3 that are induction-heated by induction coils 5 (5a, 5b) arranged close to the heating cylinder 31, and the heating rolls. The conveyor belt 4 is configured to convey the laundry by rotating synchronously while pressing the laundry against the cylinder surface of the roll. A heating cylinder and a conveyor belt are arranged so that the laundry is fed from the upper part of the cylinder and delivered from the lower part. The heating cylinder surface is preferably coated with polytetrafluoroethylene to prevent the laundry from sticking.

  A holder shaft 51 with a coil holder 53 fixed is inserted into the heating cylinder 31. An induction coil 5 (5 a, 5 b) is wound around the coil holder 53, and the induction coil 5 is close to the inner peripheral surface of the heating cylinder 31. The induction coil 5 is held in a non-contact state with the heating cylinder 31. Although the heating cylinder 31 is rotationally driven by a rotational drive device, the holder shaft 51 is held in the hollow of the heating cylinder 31 without rotating. When a high-frequency current is passed through the induction coil 5, an induced eddy current is generated in the heating cylinder 31, and the heating cylinder 31 itself generates heat due to the electrical resistance of the metal. The induction coil 5 in the heating cylinder 31 is divided into two parts, left and right (longitudinal direction of the cylinder), and the left half and the right half of the cylinder 31 can be individually controlled in temperature.

  A sensor 62 (62a, 62b) for detecting the laundry is provided at the laundry inlet. When the loading of the laundry stops, the controller 6 (6a, 6b) sets the temperature of the cylinder 31 to 10 ° C. lower than the set ironing temperature, stops the rotation of the roll 3 and the conveyor belt 4, Wait. When the laundry is detected at the insertion port 21, the heating cylinder 31 starts to rise in temperature, and the heating cylinder 31 is set by the time from when the laundry is placed on the insertion table 22 until the laundry is loaded and conveyed to the heating cylinder 31. Reach temperature.

  In conventional steam heating ironers, it is difficult to control the temperature on the low temperature side of 100 ° C. or lower, and waterproof sheets used in hospitals and nursing homes are preferably treated at 80 ° C. or lower. It was difficult to process with a roll ironer. In the roll ironer of the present invention, since the heating cylinder 31 is an induction heating type, temperature control is easy, temperature control on the low temperature side of 100 ° C. or lower is possible, and waterproofed sheets can be ironed without problems.

  When processing small items such as napkins and pillow cases, in conventional roll ironers, the parts where the laundry does not pass are heated in the same way, but the induction coil is divided to control the temperature individually (including stopping heating) ), The heating unit can be adjusted according to the width of the laundry.

  Since piping such as steam is not required and installation can be performed only by connecting electric wires, a caster can be attached to the apparatus to make it movable. In addition, since the heating rate is high and the heating efficiency is high as compared with resistance heating such as an electric heater, the electric capacity can be reduced.

Schematic cross-sectional side view of the roll ironer of the embodiment Longitudinal section of rotating heating roll Cross section Block diagram showing cylinder temperature control system

  1 to 4 are views showing an embodiment of a belt-type roll ironer provided with the induction heating roll of the present invention. In the figure, 1 is a frame of the apparatus (see FIG. 2), 2 is a casing provided outside the frame 1 and covers the entire apparatus, 3 is a heating roll, 4 is a conveyor belt, and 21 is a laundry inlet. , 22 is an input table fixed to the frame 1 and installed at the input port 21, and 23 is a laundry discharge port.

  Details of the heating roll 3 are shown in FIG. The heating roll 3 includes a cylinder 31 that forms an ironing surface. A hollow support shaft 33 is bolted to the center of the small plate 32 at both ends of the cylinder 31. One end plate 32 is welded to the cylinder 31 and the other is bolted to a flange 34 welded to the end of the cylinder 31. The support shafts 33 at both ends are pivotally supported by bearing units 35 fixed to the frame 1, and the support shaft on the right side in FIG. The attached pulley 37 is fixed.

  The both ends of the holder shaft 51 are inserted into the hollow holes of the support shafts 33 at both ends, that is, in a state where the holder shaft 51 can move freely, that is, can be relatively rotated and the axial position is not fixed. A plurality of (four in the figure) radial holder plates 53 are fixed to the holder shaft 51 by brackets 52 to form a coil holder. On the outer edge of the holder plate 53, semicircular recesses 54 are provided at intervals corresponding to the winding pitch of the induction coils 5 (5a, 5b).

  The recesses 54 of the four holder plates 53 arranged on the four sides of the holder shaft 51 are sequentially shifted by 1/4 of the winding pitch, and the strands of the induction coil 5 that is an air-core coil are 4 in each circumference. It is held in place by a recess 54 in the holder plate. The induction coil 5 is close to the inner peripheral surface of the cylinder 31, and the cylinder 31 is induction-heated by flowing a high-frequency current through the induction coil 5. The induction coil 5 is divided into left and right at the longitudinal center of the cylinder 31, and the high frequency current is individually supplied to the left and right induction coils 5a and 5b.

  Both ends of the holder shaft 51 protrude from the respective support shafts 33, and both ends of the holder shaft 51 are fixed and supported by the support bracket 11 provided on the frame 1. Therefore, even if the heating cylinder 31 rotates, the induction coil 5 does not rotate. The high-frequency current to the induction coil 5 is supplied to the induction coils 5 a and 5 b by a cable passing through the axis of the holder shaft 51 fixed to the support bracket 11.

  The conveyor belt 4 is wound around guide rollers 41 to 47 including an entrance roller 43, an exit roller 44, a drive roller 41, and a tension roller 42. The guide rollers 41, 43 to 47 excluding the tension roller 42 are pivotally supported at fixed positions, and the guide rollers 42 to 47 excluding the drive roller 41 are free rotating rollers. The tension roller 42 is urged downward in FIG. 1 by a tension applying device (not shown). The conveyor belt 4 which is an endless belt is wound around the guide rollers 41 to 47 and pressed against the cylinder 31 of the heating roll between the inlet roller 43 and the outlet roller 44.

  A motor with a reduction gear (not shown) is connected to the front side of the driving roller 41 in FIG. 1 to drive the rotation of the driving roller 41, and the shaft end on the back side in FIG. A toothed belt 36 is wound around a pulley 37 fixed to the support shaft 33, and the conveyor belt 4 and the heating roll 3 are synchronized with each other in the direction of arrow a in the drawing by the rotation of a motor with a reduction gear (not shown). It is designed to be driven.

  A laundry input table 22 is fixed to the frame 1 at an approximately intermediate height in the opening serving as the laundry input port 21 and the discharge port 23 provided in front of the housing 2 (right side in FIG. 1). Is provided. The leading end side of the charging table 22 faces the upper end of the heating cylinder 31, and a non-contact type temperature sensor 61 (61 a, 61 b) that detects the temperature of the surface of the cylinder 31 is installed immediately below the heating table 31. As shown schematically in FIG. 4, two temperature sensors 61a and 61b are provided at the center of the left and right induction coils 5a and 5b.

  A laundry detection sensor 62 (62a, 62b) is provided at a portion of the charging table 22 that crosses the front wall of the housing 2. As with the temperature sensors 61a and 61b, the laundry detection sensors 62a and 62b are also provided one by one at the center of the left and right induction coils. The laundry detection sensor 62 in the illustrated embodiment includes a light projector 68 disposed above the charging table 22 by a known photoelectric sensor and a light receiver 69 disposed in a notch provided in the charging table 22. Detection light is projected toward the light receiver 69. When the detection light is blocked by the laundry placed on the input table 22 by the laundry detection sensor 62, the amount of light entering the light receiver 69 is reduced. Therefore, the laundry is placed on the table in view of this decrease. Detect that.

  The laundry inserted from the charging table 22 is put on the surface of the heating cylinder 31 while being sandwiched between the surface of the heating cylinder 31 and the conveyor belt 4 by the synchronous rotation of the heating roll 3 and the conveyor belt 4. It moves while being pressed, leaves the surface of the heating cylinder 31 together with the conveyor belt 4 below the heating cylinder 31, leaves the conveyor belt 4 at the exit roller 44, and is sent out of the apparatus.

  FIG. 4 is a block diagram showing a power supply system of the induction coil 5. As described above, the induction coil 5 installed in the heating cylinder 31 is divided into left and right as viewed from the front surface (right side in FIG. 1) of the apparatus, and each induction coil 5a, 5b divided into two is divided. Independent high frequency generators (inverters) 63a and 63b and controllers (controllers) 6a and 6b are provided. The left and right temperature sensors 61a and 61b and the laundry detection sensors 62a and 62b are connected to the controllers 6a and 6b on the respective sides. Each of the controllers 6 a and 6 b includes a temperature setting unit 64, a temperature difference setting unit 65, and a timer 66. The inverters 63 a and 63 b are connected to a common AC power supply 67.

  When the apparatus is turned on, the controller 6 determines that the temperature of the heating cylinder 31 detected by the temperature sensor 61 is the temperature difference set in the temperature difference setting unit 65 from the ironing temperature set in the temperature setting unit 64. The inverter 63 is controlled so that the standby temperature is as low as possible. When the controller 6 receives the laundry detection signal from the laundry detection sensor 62, the controller 6 switches the control of the inverter 63 so that the temperature detected by the temperature sensor 61 becomes the set temperature. In induction heating, the temperature of the heating cylinder can be quickly increased. Therefore, even if the standby temperature is set to be about 10 ° C. lower than the set temperature, the laundry detection sensor 62 detects the laundry, While the laundry is fed into the peripheral surface of the heating roll 3, the surface temperature of the heating cylinder 31 can be raised to the set temperature.

  When the laundry is successively put in, the temperature of the heating cylinder 31 is maintained at the set temperature. On the other hand, if the state in which the laundry is not detected continues for the time set in the timer 66 (for example, 1 minute), the controller 6 determines that the laundry has been stopped, and the temperature set in the temperature difference setting unit 65 from the set temperature. Switch to a lower temperature by the difference (eg 10 ° C.). When both the left and right controllers 6a and 6b are switched to the standby temperature, simultaneously with the temperature switching, the rotation of the roll 3 is stopped, and the roll is detected when the left or right laundry detection sensor 62 detects the laundry again. You may make it start rotation.

  In the above example, it is determined that the laundry has stopped being input by the laundry detection sensor 62 provided at the laundry input port 21 being in a state where no laundry is detected for a set time. However, when a plurality of laundry detection sensors are provided in the laundry transport path to detect whether the laundry in the apparatus has passed or not, and the laundry is stopped when the laundry is no longer present in the apparatus. You may judge.

  The heating cylinder 31 of the illustrated embodiment has a diameter of 300 mmφ and a width (length) of 1100 mm. The induction coil 5 is divided into right and left, and each can be independently temperature controlled. Among linen products that are washed in a commercial laundry line, the width of a general napkin or pillow case is 500 mm. Therefore, when a napkin or pillow case is ironed, it can be put in two rows. Since the waterproof sheets have a width of 1000 mm, they are inserted in one row. When passing the napkin and the pillow case one by one, it is only necessary to heat one side of the cylinder. Moreover, since the temperature setting can be changed on the left and right sides of the cylinder, it is possible to treat the cotton pillow case at 160 ° C. on one side and treat the synthetic napkin at 120 ° C. on the opposite side.

  That is, when ironing sheets, ironing is performed with the set temperatures of the left and right controllers 6a and 6b, the standby temperature, and the timer set values being the same set values. On the other hand, when ironing a laundry having a dimension of 500 mm or less, such as a pillow case, it is possible to iron by energizing only one of the left and right induction coils. Also, when ironing two types of laundry with different ironing temperatures in parallel, change the set temperature of the controller on the right and left sides and pass the different laundry separately on the right and left sides for ironing be able to. Furthermore, since the temperature of the heating cylinder can be set to 100 ° C. or less, when ironing a waterproof linen product, the set temperature can be set to 70 to 80 ° C. for ironing. .

3 Rotating heating roll 4 Conveying belt
5 (5a, 5b) induction coil
6 (6a, 6b) Controller
31 Heating cylinder
51 Holder shaft
62 (62a, 62b) sensor

Claims (3)

In a belt-type roll ironer for laundry, comprising: a rotary heating cylinder; and a transport belt that presses the laundry against the circumferential surface of the cylinder and transports the laundry along a laundry transport path that is set.
An induction coil disposed close to the inner surface of the peripheral wall of the cylinder, a high-frequency power supply device that causes a high-frequency current to flow through the induction coil, and a controller that controls the power supply device, the induction coil having an axial center of the cylinder The belt includes the power supply device and the controller, each of which is divided into two and is configured to individually control a high-frequency current flowing through each of the two divided induction coils, and the temperature of the cylinder can be set to a temperature of 100 ° C. or less. Formula roll ironer. A sensor for detecting laundry at a central portion of each of the two divided induction coils on the upstream side of the laundry conveyance path of the cylinder, and when the controller determines that the loading of the laundry has stopped, The temperature of the stopped side of the heating cylinder is kept lower than the set ironing temperature, and the temperature is raised to the ironing temperature when the stopped side sensor detects the laundry in this standby state. The belt-type roll ironer according to claim 1, wherein   The belt-type roll ironer according to claim 1 or 2, wherein a peripheral surface of the heating cylinder is coated with polytetrafluoroethylene.

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