JP2009068117A - Cloth spreading machine and cloth spreading method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that since conventional chucks are configured to be separated from each other without stopping until the upper side of a cloth is finally spread in a state where the total weight of the cloth having a large area is supported by both the chucks, total tension applied to both the chucks in the final spread is increased and the spread sometimes fails. <P>SOLUTION: In a cloth spreading machine for spreading a cloth having a large area in a suspended state, right and left moving devices 22 and 22 are configured to separate and operate the chucks 21 and 21 at two stages of a first-stage separation state in which the upper side part Sb of the cloth is loosely spread and a final separation state in which the upper side part of the cloth is tightened, a movable mounting table device 5 is arranged so that a mounting table 51 for placing the lower part side Sc of the cloth can be displaced in the vicinity of an upper opening 32 of a suction box 31 between a suction box closed position and a suction box open position. Consequently, the upper side of the cloth is finally spread (tightened) (tension force applied to the chucks is dispersed at two stages) in a state where the lower part side of the cloth is placed on the mounting table 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cloth spreading machine and a cloth spreading method for spreading a large-area cloth such as a sheet or a futon wrap.

  For example, in a laundry factory, washing and drying cloths are pressed with a pressing machine or folded with a folding machine, and the cloth is placed in the next process device (hereinafter described with a pressing machine). When supplying, it is necessary to preliminarily spread the cloth.

  By the way, as a cloth stretcher for spreading cloths having a large area such as a sheet, there are conventionally those shown in FIGS. 12 and 13 (for example, FIGS. 1 and 2 of Patent Document 1).

The conventional cloth spreader shown in FIG. 12 and FIG. 13 has a feeding device ₁ that holds both end corners Sa and Sa of one side of a large-sized fabric S ₁ and transfers it to a predetermined height position, and a feeding device 1. The left and right stretching device 2 that receives and extends the left and right corners Sa and Sa of the fabric S ₂ transferred to a high position by the right and left directions, and the right and left stretching device 2 that is installed almost directly below the left and right stretching device 2. a suction device 3 which stretched by sucking the lower portion of the stretched been cloth S _3, the transfer device 4 to transfer the cloth S ₃ that are deployed in the right and left deployed device 2 and the suction device 3, the cloth from the transfer device 4 And a transport device 6 that receives the class S and transports it to the press side.

In this conventional cloth stretcher, as shown in FIG. 12, two feeding devices 1 are installed on the left and right. There are only one feeding device 1 or about four in parallel in the left-right direction. Each throwing device 1 has a pair of left and right chucks 11 and 11 with an interval about the shoulder width of a person. Each chuck 11 is referred to as a closing side chuck in the following description. Each of the input side chucks 11 and 11 holds both end corners Sa and Sa of one side of the cloth S ₁ . Each of the input side chucks 11 is moved upward by an elevating device (rodless cylinder) 12 while holding both end corners Sa and Sa of the cloth.

The left / right extension device 2 includes a pair of left and right chucks 21, 21 that receive the cloth both-end corners Sa, Sa held by the input side chucks 11, 11. The chuck 21 on the left and right extension device 2 side is referred to as a receiving side chuck in the following description. Each of the receiving side chucks 21 and 21 is operated in the direction of separation and proximity by the left and right movement devices (servo motors) 22 and 22, respectively, while holding the both end corners Sa and Sa of the cloth. Then, each chuck 21, 21 numeral 21 in FIG. 12 ', 21' by spaced to the position indicated by (a position where the upper side portion Sb of cloth S ₃ is tense), cloth a cloth such upper portion Sb stretched It can be spread neatly in the center of the machine.

  The suction device 3 sucks the air in the vertical suction box 31 downward by a vacuum fan 33. In the vicinity of the suction port 32 of the suction box 31, feed rollers 35, 35 that are rotated by motors 36, 36 (FIG. 12) are provided. The feeding rollers 35, 35 are used in two left and right positions at the same height.

Conveying device 6 includes a front conveyor (Vacuum conveyor) 61 which receives the cloth S ₃ of stretched state through the transfer device 4 from the lateral stretched apparatus 2, a side conveyor (delivery conveyor) 62 after successive thereto . Note that the rear conveyor 62 is continuous to the press side.

And the cloth stretcher of FIG.12 and FIG.13 functions as follows. First, washing and from the dried large area textiles, both end corners Sa of one side thereof, can be stored in each of the input side chuck 11, 11 of the respective inserting device 1 locates the Sa (state code S _1). Then, when the start button is pressed, the respective input side chucks 11 and 11 are moved upward while holding the cloth both end corners Sa and Sa, and the cloth both end corners are moved to the respective receiving side chucks 21 of the right and left spreading device 2. , 21 (in the state of S ₂ ), and then the receiving side chucks 21, 21 move to the left and right outwards to expand the upper side Sb of the cloth S ₂ (in the state of S ₃ ). Subsequently, the feeding roller 35 rotates at high speed (right rotation) in the feeding direction, and the switching damper 38 is switched to the chain line (reference numeral 38 ') side so that the air in the suction box 31 is sucked, and the cloth lower end is sucked into the suction box 31 as S _4. At this time, a downward tension is applied to the cloth S ₄ by the suction action of the vacuum fan 33, and the cloth is stretched in a square shape (state of S ₄ ). Thereafter, the switching damper 38 is switched to the side shown by the solid line, and the upper side Sb of the cloth S ₄ held by the receiving side chucks 21 and 21 is sucked and held on the top surface of the tip side of the suction box 41. 41 retreats as shown by a chain line (reference numeral 41 '), at which time the upper side Sb of the cloth is transferred onto the front conveyor (vacuum conveyor) 61, and the front conveyor 61 and the rear conveyor are kept in a stretched state. After 62, it is supplied to the press side. As described above, in the cloth spreader shown in FIGS. 12 and 13, the both ends corners Sa and Sa on one side of the cloth to be stretched are searched for and held by the respective input side chucks 11 and 11. Can be automatically expanded into a square shape.

  By the way, in this kind of cloth stretcher (FIGS. 12 and 13), in addition to the normal size sheets, there are large-sized cloths such as double bed sheets and double-layered parts such as futon wraps. Cloths are also processed, but in the case of double bed sheets and futon wrapping, the weight when processed by a cloth stretcher (dehydrated but dried) is about 3 kg.

  On the other hand, the cloth upper side Sb is stretched by the left and right movement devices 22 and 22 because the receiving side chucks 21 and 21 holding the cloth both end corners Sa and Sa are separated at a considerable speed. The left and right motion devices (motors) 22 and 22 are stopped in response to a sudden load increase when the portion Sb is tensioned.

Then, 12 and the cloth stretched machine of Figure 13, when to stretched the cloth, two receiving state of lifting the cloth by the chuck 21, 21 (S ₂ states) at each receiving side chuck 21, 21 is separated from the left and right, but at that time, the load of the entire weight of the cloth and the impact (tensile force) when the cloth upper side Sb is tensioned are simultaneously applied to the two receiving side chucks 21 and 21.

Japanese Patent Laid-Open No. 2001-159067 (FIGS. 1 and 2)

  As described above, in the conventional cloth spreader (for example, FIG. 12 and FIG. 13), when the cloth is stretched, the cloth is lifted by the both receiving side chucks 21 and 21 (the cloth by the both receiving side chucks). The upper side Sb of the fabric is tensioned under the condition that the entire weight of the fabric is borne), but when the tension of the upper side Sb of the fabric is completed, the total load of the fabric and the upper side of the fabric are An impact (tensile force) at the time of stretching is applied at the same time, and a considerably large detachment (disengagement) action of the cloth end portion acts on each of the receiving side chucks 21 and 21.

  Therefore, in this type of conventional cloth spreader, if the gripping force of the cloth corners of each of the receiving side chucks 21 and 21 is weak, the cloth corner Sa held when the cloth upper side Sb is tensioned. May come off from the receiving chuck 21. In this case, it is necessary to fail to spread the cloth, collect the failed cloth, and perform the input operation again.

  In particular, in the case of cloths that have become more brittle because the number of cleanings is increased, the two receiving side chucks 21 and 21 are connected to the upper sides of the cloths with the two receiving side chucks 21 and 21 supporting the entire weight of the cloths. When the portion Sb is abruptly separated until the final extension, a downward tension due to the total weight of the cloth and an outward tension applied to the cloth upper side Sb are generated at the cloth gripping portion at the same time. , 21 may cause the fabric of the gripping portion to be extended or damaged.

  Therefore, the present invention provides a cloth stretching machine and a cloth stretching method that can reduce the burden on the chuck gripping portion (both corners) of the cloth when the upper edge of the cloth is finally stretched. The purpose is that.

  The present invention has the following configuration as means for solving the above problems.

[Invention of Claim 1 of the Present Application]
The invention of claim 1 of the present application is directed to a fabric stretcher for neatly spreading large-area fabrics such as sheets and futon wraps after washing and drying.

  The cloth stretcher according to the first aspect of the present invention is to fabricate the cloth by separating the chucks to the left and right with a left and right movement device in a state where both end corners of one side of the large area cloth are held by the chucks at predetermined height positions. The upper side of the fabric is stretched left and right, while the lower side of the suspended fabric is sucked into a suction box installed below the fabric lifting position so that the fabric is stretched in a square shape in the suspended state. It is a thing.

  Each chuck is installed at a height position of, for example, about 300 cm (not particularly limited) from the floor surface, and can grip both corners of the cloth at the height position.

  The suction box is vertically oriented and has a height of about 130 cm (not particularly limited) from the floor surface. The inside of the suction box is sucked at a predetermined timing by a vacuum fan. In this type of cloth stretcher, a feeding roller is installed at the upper end of the front wall of the suction box. By sucking the suction box and rotating the feeding roller to the cloth feeding side at high speed, The lower side of the suspended cloth can be smoothly sucked into the suction box.

  In the cloth stretcher according to the first aspect of the present invention, as the left and right movement device, each chuck is in the first step separated state where the upper side of the cloth is completely tensioned and the upper side of the cloth is tensioned. What is used to perform the separation operation in two stages with the final separation state is used. A servo motor can be used as the left / right movement device.

  On the other hand, in the vicinity of the upper opening of the suction box, there is a mounting table on which the lower part of the cloth can be placed while the cloth is lifted, and the closed position where the lower part of the cloth is prevented from hanging down in the suction box and the lower part of the cloth is inside the suction box. There is provided a movable mounting table device that can be displaced between an open position that allows it to hang down.

  The mounting table may be installed at a position slightly lower (for example, a position lower by about 20 cm) from the upper end of the front wall of the suction box (the upper end of the feeding roller if there is a feeding roller). Further, this mounting table may be provided in the full width range of the suction box, but only in a predetermined length range (for example, a length range of about 100 to 150 cm) near the center of the cloth lifting position by the chucks. It may be provided.

  A rotary solenoid, a motor, or a telescopic cylinder can be adopted as a drive device that displaces the mounting table between the closed position and the open position. In addition, the opening / closing operation of the mounting table may be performed by turning up and down in the vicinity of the upper opening of the suction box, or may be caused to appear in and out of the suction box.

  Further, the mounting table uses a gas permeable one that does not block the intake air in the suction box at the closed position. As the air permeability imparting structure of the mounting table, a cloth mounting plate portion having a mesh shape, a lattice shape, or a comb shape can be employed.

  In the cloth stretcher according to the first aspect of the present invention, the cloth stretcher is controlled as in the cloth stretch method described later. That is, the both end corners of one side of the cloth are gripped by the respective chucks at a predetermined height position, and the chucks are separated by the left and right movement device to a loosely stretched state before the upper side of the cloth is completely tensioned. . In this relaxed state, the upper side of the cloth is slightly loosened and no tension is applied in the left-right direction. Then, before the inside of the suction box is sucked, the mounting table of the movable mounting table device is operated to the closed position in the vicinity of the upper opening of the suction box, and then the inside of the suction box is sucked. Then, the lower side of the cloth suspended in the loosely stretched state tends to be sucked into the suction box, but the lower part of the cloth is zigzag on the mounting table near the upper opening of the suction box. It is placed in a bent state, and about ½ of the total weight of the cloth is supported by the placement table. Therefore, in this state, the weight burden of the cloth by each chuck (downward tension force applied to each chuck) is considerably reduced. Next, while the lower part of the cloth is supported by the mounting table, the chucks are separated by the left and right moving device until the upper side of the cloth is tensioned (a tension is applied between both chucks). The downward tension applied to each chuck is reduced by an amount corresponding to the weight burden, and the total detachment action force (extraction force) on each chuck is reduced accordingly.

[Invention of claim 2 of the present application]
The invention of claim 2 of the present application is characterized in that, in the cloth stretcher of claim 1, the apparatus comprises a vertical movement device for moving the movable mounting table device up and down within a predetermined height range from the vicinity of the upper opening of the suction box. Yes.

  As the vertical movement device, an expansion / contraction cylinder is suitable, but a vertical movement device may be used. The vertical movement range of the movable mounting table device is not particularly limited, but may be about 50 to 60 cm, for example. Note that when the movable mounting table device moves up with respect to the suction box, a gap of a predetermined height is generated between the movable mounting table device and the upper end of the front wall of the suction box. It is good to make it move up and down with the shielding board of the predetermined height width which slides up and down with respect to a front wall.

  As in this second aspect, the movable mounting table device can be moved up and down by the vertical movement device. In the first aspect, before the two chucks are maximally separated (the upper side of the cloth is tensioned), The weight of the cloth supported on the placing table can be increased by moving the placing table on which the cloth lower side is placed to a predetermined height (in other words, the weight of the cloth borne by both chucks can be reduced). it can). When the upper side of the cloth is tensioned in this state (the stage on which the lower part of the cloth is placed is moved up to a predetermined height), the downward tension force due to the weight of the cloth applied to both chucks is further reduced. As a result, the total tension force applied to the chuck gripping portion is reduced.

[Invention of claim 3 of the present application]
The invention of claim 3 of the present invention is to separate the chucks to the left and right in a state where both corners of one side of a large-sized cloth such as a sheet or a futon wrapping are gripped by the chucks at predetermined height positions. The upper side of the cloth is stretched to the left and right, while the lower side of the suspended cloth is sucked into a suction box installed below the cloth lifting position, so that the cloth is stretched in a square shape. This is intended for the cloth spreading method. The cloth stretch method of claim 3 is mainly performed using the cloth stretcher of claim 1.

  In the cloth extending method according to claim 3, when the cloth lifted by each chuck is expanded, the respective chucks are separated to the loosely extended state before the upper side of the cloth is completely tensioned. In the state, support the weight of the lower part of the cloth near the upper opening of the suction box, and with the weight of the lower part of the cloth supported, separate the chucks until the upper side of the cloth is tensioned, and then lower the lower part of the cloth. The weight support on the side is released, and the lower part side of the cloth is sucked into the suction box.

  The cloth spreading method of claim 3 also supports the weight of the cloth lower side near the upper opening of the suction box before final spreading the upper side of the cloth, as in the explanation of the operation of claim 1, Since the chucks are separated in the state until the upper side of the cloth is tensioned, the downward tension force (due to the weight of the cloth) received by each chuck when the upper side of the cloth is finally stretched can be reduced.

  According to the cloth stretcher of claim 1 and the cloth stretch method of claim 3, when the cloth lifted by each chuck is stretched, the upper side of the cloth is completely tensioned. In the relaxed state, the weight of the lower side of the cloth is supported near the upper opening of the suction box, and the upper side of the cloth is held in the state where the weight of the lower side of the cloth is supported. Since the weight support on the lower side of the cloth is released and then the lower part of the cloth is sucked into the suction box, the upper side of the cloth where a large tension is applied to each chuck. It can reduce the burden of cloth weight (downward tension) during stretching.

  Therefore, in the inventions of claims 1 and 3 of the present application, when the upper side of the cloth is finally tensioned (when a large outward tension is applied to the upper side of the cloth), the total detachment action force (cloth) The pulling force of the gripping part is reduced, and the cloth corners of the chuck gripping part are less likely to come off (the cloth spreading operation does not fail). Also, if the downward tension force due to the fabric weight is reduced during the final tension of the upper side of the fabric as described above, the fabric pulling force against the fabric corner held by each chuck is reduced. There is also an effect that the cloth of the chuck gripping portion (cloth corner portion) is not easily stretched or damaged.

  In the invention of claim 2 of the present application, the cloth stretcher of claim 1 is provided with a vertical movement device for moving the movable mounting table device up and down within a predetermined height range from the vicinity of the upper opening of the suction box. The cloth to be supported on the placing table by moving the placing table on which the lower part of the fabric is placed to a predetermined height before separating the chucks at the maximum in item 1 (tensioning the upper side of the cloth). The weight of the fabric can be further increased, and the cloth load applied to both chucks is further reduced by that amount.

  Therefore, in the cloth stretcher of claim 2, the total tension force applied to the chuck gripping portion when the upper side of the cloth is finally tensioned is further reduced, and the chuck gripping portion is more than the case of claim 1 above. The total detachment action force (the pulling-out force of the cloth gripping portion) is further reduced.

  Hereinafter, with reference to FIGS. 1-11, the cloth stretcher and the cloth stretch method of an Example of this application are demonstrated. The fabric stretcher of this embodiment is a device that neatly spreads a large area fabric S such as a sheet or a futon wrap and transports it to the next process device such as a press or a folding machine.

  In the fabric stretcher of the embodiment shown in FIGS. 1 to 2, the input device 1, the left and right stretch device 2, and the suction device 3 having the same structure as the fabric stretcher of the conventional example (FIGS. 12 to 13). The delivery device 4 and feeding rollers 35 are provided. The transport device 6 has a front conveyor 61 and a rear conveyor 62 as in the above-described conventional example. However, a part 62a of the rear conveyor 62 is extended to the front side, for example, a pillow. A small area cloth such as a cover or bath towel can be directly placed on the front part 62 a of the rear conveyor 62. In this case, the input device 1 is flipped upward by a swing device (extension cylinder) (not shown).

  Also, in the fabric stretcher of the present embodiment (FIGS. 1 to 11), the same reference numerals as those of the conventional example (FIGS. 12 and 13) have the same functions. In the description of the structure and function of these devices, the description in the section of the prior art is used. The air in the suction box 41 of the delivery device 4 is sucked by the suction machine (vacuum fan) 42 and the upper side Sb of the cloth is formed on the upper surface of the front half of the suction box 41 (a large number of small holes are formed). It can be adsorbed. Further, the suction box 41 is moved back and forth between the position shown by the solid line in FIG. 2 and the position shown by the chain line (position 41 ') by a pair of left and right extension cylinders 43, 43.

  The inside of the suction box 31 of the suction device 3 is sucked downward by a suction machine (vacuum fan) 33. The height of the front wall 34 of the suction box 31 (the height to the feeding roller 35) is about 130 to 140 cm in this embodiment.

  On the front surface of the suction box front wall 34, a shielding plate 71 is provided that can slide up and down in proximity to the suction box front wall 34. The function of the shielding plate 71 will be described later. The shielding plate 71 has a horizontally long plate portion that is horizontally long and has an appropriate height (for example, about 60 cm). In addition, hanging portions 72 and 72 that hang downward from the lower surface of the plate portion are provided at the left and right ends of the shielding plate 71.

  The shielding plate 71 can be moved up and down at a position near the front surface of the front wall 34 of the suction box by a pair of left and right moving devices 7 and 7. As each of the vertical movement devices 7 and 7, a telescopic cylinder is employed. The vertical movement range (stroke of the telescopic cylinder) of the shielding plate 71 is set to a range (for example, slightly less than 55 to 60 cm) that is slightly smaller than the height width (about 60 cm) of the shielding plate 71. FIG. As shown in the figure, the lower end of the shielding plate 71 'and the upper end of the intake box front wall 34 are slightly overlapped even when the vertical movement device (extensible cylinder) 7' is fully extended.

  The feed roller 35 is divided into left and right two. The feeding rollers 35 and 35 are installed on the upper part of the shielding plate 71 via horizontally long mounting bases 37 and 37, respectively. The feed rollers 35 and 35 are rotated by motors 36 and 36, respectively. Further, the feeding rollers 35, 35 on each side, the mounting bases 37, 37 on each side, and the motors 36, 36 on each side are integrally coupled.

  Each of the mounting bases 37 and 37 is pivotally attached to each abutting side end portion by a shaft 37a at the center of the upper surface of the shielding plate 71, and the outer end side of each of the mounting bases 37 and 37 is tilted (expandable). Cylinder) 8 and 8 support. Each telescopic cylinder that becomes the tilting devices 8, 8 is interposed between the lower end portion of the hanging portion 72 of the shielding plate 71 and the outer end portion of the mounting base 37.

  Covers 39 and 39 are attached to the front surfaces of the respective mounting bases 37 and 37 so as to hang downward by a predetermined length. As shown in FIG. 5, the cover 39 is configured such that when the feeding rollers 35 and 35 are tilted (the mounting base 37 is separated from the upper surface of the shielding plate 71), the mounting base 37 and the upper end portion of the shielding plate 71. The gap formed between the two is shielded.

  When the left and right tilting devices (extension cylinders) 8 and 8 are in the contracted state, as shown in FIG. 1, the feeding rollers 35 and 35 are maintained in a horizontal posture, while the tilting devices 8 and 8 are maintained. As shown in FIG. 5, the outer ends of the mounting bases 37 and 37 are tilted upward with the shaft 37a as a fulcrum, as shown in FIG. 5, and the feeding rollers 35 and 35 are deformed into a gentle V shape. The V-shaped tilted state of each of the feeding rollers 35 and 35 is such that when the duvet cover (wrapping having a rounded portion at the center) is stretched, a part of the duvet cover (lower side) is suspended in an inverted state. For the lowered one, the reverse portion is automatically returned to normal. In addition, since this kind of feeding roller tilting mechanism is conventionally well-known, detailed description is abbreviate | omitted.

  In this embodiment, when the vertical movement devices (extension cylinders) 7 and 7 are in the most contracted state, as shown in FIGS. 1 to 3, the shielding plate 71, the mounting bases 37 and 37, the feeding rollers 35 and 35, And the tilting devices 8 and 8 are respectively in the downward movement position. 2 and 3, when each vertical movement device 7 'is extended to the maximum, the shielding plate 71', each mounting base 37 ', and each feeding roller 35' (and each tilting device) are connected. In this state, it moves up to a predetermined height position.

  By the way, in the conventional cloth stretcher, when the cloth is stretched, the cloth is lifted by the both receiving side chucks 21 and 21 (the state in which the total weight of the cloth is borne by the both receiving side chucks). Although the upper side Sb is tensioned, if the entire load of the cloth is applied to the receiving side chucks 21 and 21 when the tension of the upper side Sb of the cloth is completed, the above-mentioned “problem to be solved by the invention” As explained in the section, since the total load of the cloth and the impact (tensile force) when the cloth upper side Sb is stretched are simultaneously applied, a considerably large cloth end portion is applied to each receiving side chuck 21, 21. The detachment (disengagement) acting force acts (the fabric corner portion Sa held by the receiving side chucks 21 and 21 may come off from the receiving side chuck 21). In particular, if the fabric is a large size for a double bed or a fabric with two layers of cloth, such as a futon wrap, the fabric itself will be heavy (for example, about 3Kg), and each receiving side chuck The downward tension applied to 21 and 21 is increased.

Therefore, in the cloth stretcher of this embodiment, as the left and right moving devices 22 and 22, the first chucks 21 and 21 are in a first step separated state in which the receiving side chucks 21 and 21 are in a loosely stretched state before the cloth upper side Sb is tensioned (see FIG. while 1 interval L ₁₎ and the cloth upper portion Sb is using those to be separating operation in two stages with the final separation state of tension (distance L ₂ in FIG. 8, FIG. 10), suction boxes In the vicinity of the upper opening 32 of 31, there is provided a movable mounting table device 5 on which the cloth lower side Sc can be placed in a cloth lifting state.

The reason why the receiving side chucks 21 and 21 are separated in the above-described two stages (first separated state and final separated state) is as follows. First, the receiving side chucks 21 and 21 are in the first-stage separated state (interval L _{1 in} FIG. 1) when the upper side portion Sb of the cloth is not tensioned (gripped by the receiving side chucks 21 ′ and 21 ′. In the state where the cloth end is not subjected to the separation action due to tension), the cloth lower side Sc is expanded to an area that allows the cloth lower side Sc to be sucked into the suction box 31, and then the final separated state (FIG. 8). The distance L _{2 in} FIG. 10 is to allow the cloth upper side Sb to be neatly stretched in a tensioned state (state S ₇ in FIG. 10).

  The movable mounting table device 5 displaces a mounting table 51 that can open and close the vicinity of the upper opening (hereinafter also referred to as an intake port) 32 of the suction box 31 between a closed position and an open position by driving devices 54 and 54. It ’s what you get.

  In this embodiment, the mounting table 51 has a mounting plate 53 attached to a shaft 52 as shown in an enlarged view in FIGS. 3 and 4, and the upper end of the suction box front wall 34 at the suction port 32 of the suction box 31. At a position slightly lower than (the upper end of the feeding roller 35) (for example, a position that is lower by about 20 cm), the suction port 31 is installed in a length range covering almost the entire width (left and right width). At the end (both ends in this embodiment) of the shaft rod 52, the mounting plate 53 is displaced between an open position shown by a solid line in FIGS. 3 and 4 and a closed position shown by a chain line (reference numeral 53 '). A device 54 is provided. In this embodiment, a rotary type such as a rotary solenoid or a motor is used as the drive device 54, but an expansion / contraction cylinder can also be used. Further, in this embodiment, the one that causes the mounting plate 53 to pivot up and down is adopted, but one that slides in and out in the inner and outer directions may be adopted (in this case, an extension cylinder is used as the driving device 54). use).

  The mounting plate 53 has air permeability so that the intake air in the suction box 31 is not blocked in the closed position (state of reference numeral 53 ′ in FIGS. 3 and 4). In this embodiment, a comb-like shape in which a large number of notches 53a, 53a,... Are intermittently formed is employed as the air permeability imparting structure of the mounting plate 53, but a mesh-like or lattice-like shape is adopted. May be.

  In this embodiment, the mounting plate 53 of the mounting table 51 has a left and right length that covers almost the entire width of the intake port 32 of the intake box 31. You may provide only in the predetermined length range (for example, length range of about 100-150 cm) in the center vicinity of the cloth lifting position by each receiving side chuck | zipper 21,21.

  The movable mounting table device 5 is installed in a horizontal posture by attaching the driving devices 54 and 54 (or the shaft rod 52) to the left and right ends near the upper end of the shielding plate 71. The devices 7 and 7 are moved up and down together with the shielding plate 71.

The fabric stretcher of this embodiment operates as follows. As shown in FIG. 1 and FIG. 2, in order to spread a cloth that has been washed and dried, search for both corners Sa and Sa on one side of the cloth, and connect the corners Sa and Sa to a pair of input sides. after respectively held by the chuck 11, 11 (FIG. 1, S ₁ of FIG. 2), press the start button, moves upward while the supplying side chuck 11, 11 is held cloths both end corners Sa, the Sa → each both end corner portions Sa, passes Sa to each recipient chucks 21, 21 of the right and left stretched apparatus 2 (the state of S ₂ in FIG. 1). At this time, the mounting table 51 (mounting plate 53) is in a closed state shown by a chain line in FIG. 2 to FIG. 4 (reference numeral 51 ′ or 53 ′). The air is sucked into the suction box 31 through the gaps between the notches 53a, 53a,.

Next, the receiving side chucks 21 and 21 are separated from each other by the left and right moving devices 22 and 22. In the first stage, the upper sides Sb of the cloths are arranged as indicated by reference numerals 21 'and 21'. It is made to separate until it is in a relaxed and stretched state before it is completely tensioned (interval L _{1 in} FIG. ₁ ). In the first stage separation state (first stage stretched state is shown by symbol S _3), 2 single receiving chuck 21 ', 21' intended long length of the total weight or nearly total weight (cloth of cloth in Although the lower part of the cloth may be in contact with the floor surface), the upper side Sb of the cloth is not tensioned, so the tension applied to each chuck 21 ', 21' is downward due to the cloth load. Only tension. In the first stage stretched state, the cloth lower side Sc is stretched to an area that can be sucked into the suction box 31.

Next, the feeding roller 35 rotates at a high speed (right rotation) in the feeding direction, and the switching damper 35 is switched to the chain line illustrated side (the solid line illustrated side in FIG. 6) to suck the air in the suction box 31. (Air in the portion of the air inlet 32 is sucked from the cutout portion 53a of the mounting plate 53) and the lower cloth side Sc passes over the feeding roller 35 as shown in FIG. is fed into the (code S _4), cloths lower side Sc is placed in a state flexed in zigzag on the mounting table 51 is in turn closed position as indicated by reference numeral Sc '(rest plate 53). The feeding roller 35 stops after feeding the cloth lower side Sc onto the mounting table 51.

  Subsequently, as shown in FIG. 7, the vertical movement devices (extension cylinders) 7 and 7 are extended so that the placing table 51 is moved upward together with the shielding plate 71 while the cloth lower side Sc is placed on the placing table 51. Move. At this time, the vicinity of the upper and lower middle portions of the cloth is also placed on the mounting table 51, and about 2/3 of the total weight of the cloth is supported on the mounting table 51. Therefore, the load of the cloth supported by the two receiving side chucks 21 and 21 is about 1/3 of the total weight of the cloth. Even when the mounting plate 53 of the mounting table 51 is provided only in a predetermined length range (about 100 to 150 cm) near the center of the cloth lifting position as described above, the weight is almost the same as the above (the total weight of the cloth). About 2/3 of the above).

Next, in the state where the mounting table 51 is moved upward, as shown in FIG. 8, the receiving side chucks 21 and 21 are separated to the final separated state (interval L ₂ ), and the cloth upper side Sb is tensioned. At this time, tension is applied between the receiving chucks 21 and 21, but the downward tension received by the receiving chucks 21 and 21 is reduced by the weight load of the cloth by the mounting table 51. The total detachment action force (extraction force) with respect to the chucks 21 and 21 is reduced. Accordingly, when the upper side portion of the cloth is stretched, the corner portion of the cloth is not easily detached from the receiving side chuck gripping portion (the cloth stretching operation does not fail).

Next, the mounting table 51 is displaced from the state shown in FIG. 8 to the open position by the driving device 54 (shown by the chain line in FIG. 7), and the suction box 31 is sucked, so that the mounting table 51 is mounted on the mounting table 51. The cloth lower side Sc that has been used is sucked downward in the suction box 31. At this time, the vertical movement devices 7 and 7 are contracted, and the movable mounting table device 5, the feeding roller 35 and the like are lowered to the original low position as shown in FIG. In this state, as shown in FIG. 10, cloths are neatly stretched to the left and right and up and down as Code S _7.

Thereafter, the switching damper 38 is switched to the side shown in FIG. 11, and the upper side portion of the cloth held by the receiving side chucks 21 and 21 is sucked and held on the top surface of the tip side of the suction box 41 (reference numeral in FIG. 11). S ₈ ), the suction box 41 moves backward as shown by the chain line (reference numeral 41 ′), and at that time, the upper side of the cloth is transferred onto the front conveyor (vacuum conveyor) 61 (state of reference numeral S ₉ ). It is supplied to the press side through the front conveyor 61 and the rear conveyor 62 in the state.

Thus, in the cloth stretched machine of the present embodiment, to be deployed in the state lifting the cloth, the cloth and loose stretched state indicated by reference numeral S ₃ in FIG. 1 as a first step, then in FIG. 7 As shown in FIG. 8, the cloth lower side Sc is placed on the mounting table 51, and the receiving side chucks 21 and 21 are separated to the final separated state as shown in FIG. When the fabric is finally stretched (FIG. 8), the weight burden of the cloths by the receiving side chucks 21 and 21 is reduced. Therefore, the detachment force of the cloth gripping portion by the receiving side chucks 21 and 21 is reduced, and the cloth spreading work is unlikely to fail.

It is a front view of the cloth stretcher of an example of the present application. It is an II-II arrow line view of FIG. It is a partially expanded sectional view of FIG. It is the IV-IV arrow line view of FIG. FIG. 2 is a state change diagram of FIG. 1 (a tilting state diagram of a feeding roller). It is a state change figure from FIG. FIG. 7 is a state change diagram from FIG. 6. It is a front view of the final stretched state of the cloth upper side part in the cloth stretcher of FIG. FIG. 8 is a state change diagram from FIG. 7. FIG. 2 is a front view of a final stretch state of the entire fabric in the fabric stretcher of FIG. 1. FIG. 10 is a state change diagram from FIG. 9. It is a front view of the conventional cloth stretcher. It is a XIII-XIII arrow line view of FIG.

Explanation of symbols

  1 is a loading device, 2 is a left-right extension device, 3 is a suction device, 4 is a delivery device, 5 is a movable mounting device, 6 is a transport device, 7 is a vertical movement device, 11 is a loading side chuck, and 21 is a receiving side chuck. , 22 is a lateral movement device, 31 is a suction box, 32 is an upper opening (intake port), 33 is a vacuum fan, 35 is a feed roller, 51 is a mounting table, 53 is a mounting plate, 54 is a driving device, and S is a cloth. , Sa is a cloth corner, Sb is a cloth upper side, and Sc is a cloth lower side.

Claims (3)

In a state where both end corners (Sa, Sa) of one side of a large-sized cloth (S) such as a sheet or a futon wrapping are gripped by chucks (21, 21) at predetermined height positions, 21, 21) is moved left and right by the left and right movement devices (22, 22) to expand the upper side (Sb) of the cloth to the left and right, while the lower side (Sc) of the suspended cloth is moved to the cloth lifting position. A cloth stretcher adapted to stretch the cloth (S) into a rectangular shape in a lifted state by being sucked into a suction box (31) installed below
The left and right movement device (22, 22) is configured so that each chuck (21, 21) is in a first step separated state in which the upper side portion (Sb) of the cloth is in a loosely stretched state before the cloth is completely tensioned, and the cloth. While the upper side portion (Sb) is made to separate in two stages with the final separated state where the tension is tensioned,
In the vicinity of the upper opening (32) of the suction box (31), a placing table (51) on which the cloth lower side (Sc) can be placed in the cloth lifting state, and the cloth lower side (Sc) is a suction box (31). A movable mounting table device (5) adapted to be displaceable between a closed position for preventing it from hanging down and an open position for allowing the cloth lower side (Sc) to drop into the suction box (31). As well as
The mounting table (51) uses a material having air permeability so that the intake air in the suction box (31) is not blocked in the closed position.
A fabric stretcher characterized by that.   The cloth according to claim 1, further comprising a vertical movement device (7) for moving the movable mounting table device (5) up and down within a predetermined height range from the vicinity of the upper opening (32) of the suction box (31). An extension machine. In a state where both end corners (Sa, Sa) of one side of a large-sized cloth (S) such as a sheet or a futon wrapping are gripped by chucks (21, 21) at predetermined height positions, 21 and 21) are separated left and right to expand the cloth upper side (Sb) to the left and right, while the lower side (Sc) of the suspended cloth is placed below the cloth lifting position (31 ) Is a cloth extending method in which the cloth (S) is stretched in a square shape in a lifted state by being sucked into
When the fabrics lifted by the chucks (21, 21) are stretched, the chucks (21, 21) are separated to the loosely stretched state before the fabric upper side (Sb) is completely tensioned, and the loose stretches are performed. In the state, the weight of the cloth lower side (Sc) is supported near the upper opening (32) of the suction box (31), and the weight of the cloth lower side (Sc) is supported in the respective chucks (21, 21). Are separated until the upper side (Sb) of the fabric is tensioned, and then the weight support on the lower side (Sc) of the fabric is released, and the lower side (Sc) of the fabric is sucked into the suction box (31). To
A method for extending fabrics.

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