JP2006233374A - Fabric stretching and transferring machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fabric stretching and transferring machine settled the problem that conventional fabric stretching and transferring machines cannot tidily (in a state causing neither wrinkle nor ripple) stretch each of inside and outside faces of a fabric having two layered parts. <P>SOLUTION: The fabric stretching and transferring machine holds each of both end corners Sa, Sa of one edge of a large area fabric and hangs up to a predetermined position in that state, separates the holding parts right and left to stretch in a hanging state and makes the stretching and hanging state fabric transferable to the next step side, wherein a fabric front side stretching device 6 is set at the backside of the stretching and hanging state fabric S, which stretching device 6 has right and left stretch belts 61, 61 for slidably disposing to the fabric backside and stretching the fabric back side right and left, and a air blow devices 7 is set at positions facing to each of stretch belts 61, 61, which air blow devices 7 are for blowing air right and left obliquely outside to the front face of the stretching and hanging state fabric S and for stretching the fabric front face. Thereby, each front and rear sides of the fabric can be stretched separately. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cloth spreading and conveying machine for spreading a cloth having a large area such as a sheet or a futon wrapping and transporting the spreading cloth to the next process side.

  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 fabric spreading and conveying machine that can stretch a large area of cloth such as a sheet or a futon wrapping and can transport the stretched cloth to the next process side, for example, Japanese Patent Application Laid-Open No. 2001-159067. There is what is shown by (patent document 1). The cloth spreading / conveying machine of the first known example is lifted to a predetermined height while gripping both end corners of one side of a large-area cloth, and the respective gripping portions of the cloth are separated to the left and right. Thus, the cloth can be stretched in a lifted state, and the cloth in the stretched state can be conveyed to the next process (for example, press process) side. It should be noted that the cloth in the stretched and lifted state is stretched downward by sucking the inside of the intake box while being suspended in the lower intake box, so that the cloth is stretched in a square shape. It has become.

  However, in the cloth spreading / conveying machine shown in the first known example (Japanese Patent Laid-Open No. 2001-159067), a certain stretched state can be secured by sucking the cloth from below the cloth in the stretched and lifted state. However, a small wrinkle (slack part) may remain on the cloth, or the cloth may wave. Then, if the stretched fabrics with wrinkles or undulations are post-fed as it is and applied to the press machine, the wrinkles and wavy portions are crushed in a folded state and a clear crease occurs. There is. In addition, in such a cloth with a crease, it looks bad and a complaint from a customer comes out.

  Further, among this type of cloth spreading and conveying machine, there is one disclosed in, for example, Japanese Patent Laid-Open No. 7-54262 (Patent Document 2). As shown in FIG. 9, the cloth spreading and conveying machine of the second known example grips both end corners Sa and Sa on one side of the cloth S with the left and right lifting chucks 110 and 110, and at a predetermined height position. The cloth S can be held in the stretched and lifted state by moving each of the lifting chucks 110 and 110 in the left-right separated direction. In the second known example, as the cloth S to be spread, a futon wrapping cloth having a rounded portion at the center is adopted.

Further, in this cloth spreading and conveying machine, the cloth S in the stretched and lifted state shown in FIG. 9 is transferred from each lifting chuck 110 to the receiving chuck 140 of the delivery device 104 as shown in FIG. receiving (cloth in closing) is in a state of S ₁ in FIG. 10), followed by receiving the chuck 140 as shown in FIG. 11 is retracted. In this state, the vicinity of the upper and lower middle portions of the cloth S ₂ contacts the feeding roller 134. Then, the inside of the intake box 131 is air, rotating in the direction infeed rollers 134 infeed fabrics, as shown at S ₄ via the state showing the lower half of the cloth S ₂ by reference numeral S ₃ Then, the air is sucked into the intake box 131 (after a predetermined timer, the intake air in the intake box 131 stops). Thereafter, the conveyor (suction conveyor) 151 travels and the receiving chuck 140 is opened, and the upper edge portion of the cloth held by the receiving chuck 140 is transferred onto the starting end (horizontal portion) of the conveyor 151 (FIG. 11). State of S ₄ b). Then, as the conveyor 151 travels, the lower side of the cloth S ₄ is sequentially pulled up, and the cloth is conveyed to the next process (press process) side by the conveyor 151.

Incidentally, in the state cloth is stretched lifting, the lower side of the cloth S ₄ is drawn into the intake box 131 (according tension on the lower side of the cloth) as shown in Figure 11, the textiles S ₄ considerable Although it is in a stretched state, a small wrinkle or a wavy portion (symbol Y in FIG. 9) may remain on the fabric Y. Therefore, in the cloth spreading and conveying machine of the second known example, a pair of left and right expanding devices 106 and 106 are provided on the back side of the cloth S ₄ in the stretched and lifted state, immediately below the starting end of the conveyor 151. As shown in FIG. 9, the left and right expansion devices 106 and 106 have expansion belts 161 and 161 in a lateral orientation on the left and right, respectively. Each of the expansion belts 161 and 161 is configured such that the front side thereof travels left and right outward. In addition, each of the expansion belts 161 and 161 uses a breathable one having a large number of small holes. By sucking air in the intake box 163 provided on the back side of each of the expansion belts 161 and 161, The front surface of each of the expansion belts 161 and 161 has a function of sucking the back surface of the cloth.

The left and right expansion devices 106 and 106 are inhaled in the intake box 163 in synchronization with the suction conveyer 151 traveling, and the front surfaces of the expansion belts 161 and 161 travel outward in the left and right directions, then the back of the cloth S ₄ is gradually raised while contacting the front face of each extension belts 161 and 161, functions to expand successively the right and left outwardly cloth such. Therefore, in the cloth spreading / conveying machine of the second known example, a single cloth S such as a sheet has a relatively good stretched state.

JP 2001-159067 A JP-A-7-54262

  By the way, the cloth to be stretched is a futon wrap S having a rounded portion Sc as shown in FIG. 12A (wrapping around the futon) or a bag shape as shown in FIG. In the futon wrapping S (having the entire futon) having the opening Sd at the edge, the cloth has two overlapping portions on the front and back.

  Then, when the duvet wrap S having the two-sided double-sided fabrics as described above is stretched by the cloth stretcher of the second known example (FIGS. 9 to 11), it is stretched by the left and right expanding devices 106 and 106. Although the back side of the cloth S in the lifted state can be expanded to the left and right, there is no function of expanding (stretching) the front side of the cloth S. Accordingly, the stretch fabric S may be sent and pressed in a state where there are small wrinkles and wavy portions (reference numeral Y in FIG. 9) on the front side of the fabric, and a clear crease may be formed on the front surface of the fabric. .

  Moreover, in the cloth (duvet wrapping S) having the double-sided fabric as described above, air may remain between the double-layered fabrics and swell, but the double-layered portion swells. Pressing with a will cause the dough to fold and cause creases.

  In view of the above-mentioned known problems, the present invention is not only a sheet of cloth such as a sheet, but also a cloth having a two-sided overlapped portion such as a futon wrapping, so that both front and back surfaces are neatly spread. It is an object of the present invention to provide a fabric spreading and conveying machine that can be made to operate.

  The present invention has the following configuration as means for solving the above problems. The invention of the present application is lifted to a predetermined height in a state where both corners of one side of a large-area cloth such as a sheet or a futon wrapping are gripped, and the gripping portions of the cloth are separated to the left and right. The present invention is intended for a cloth extending and conveying machine that can be conveyed to the next process side after the cloth is stretched in a lifted state.

  The cloth spreading and conveying machine according to the present invention has a cloth back extension having left and right extension belts that are in sliding contact with the cloth back and extend the cloth back side to the left and right. While providing the device, an air blow device for expanding the front surface of the cloth that blows air toward the left and right diagonally outward with respect to the front surface of the stretched cloth is provided at the position facing each expansion belt. It is characterized by.

  The left and right expansion belts of the cloth back surface expansion device are installed on the back side of the cloth in the stretched and lifted position, near the upper part of the cloth cloth, at positions separated from the center of the width of the cloth cloth to the left and right. ing. Each of the expansion belts is installed in a laterally long posture with the front surface being a substantially vertical surface, and the front surface travels in the laterally outward direction. In addition, this cloth back surface expansion device is preferably provided with an intake function capable of sucking the cloth back surface on the front surface of each expansion belt.

  The air blow device for expanding the front of the cloth is provided with nozzles that blow out air at positions facing the right and left expansion belts and distributed to the left and right from the center of the width of the cloth in the stretched and lifted state. An appropriate number of nozzles on each side can be installed on the left and right or top and bottom. Each of these nozzles blows air toward the left and right diagonally outwards. The nozzles are supplied with compressed air at a predetermined timing from a compressed air source such as an air supply fan.

  In the cloth spreading and conveying machine of the present invention, in the same manner as in each of the known examples described above, when searching for both corners of one side of the cloth at the working position and holding the both corners on the respective input chucks, Each input chuck moves up to a predetermined height while holding both corners of the cloth, passes the corners of the cloth to each receiving chuck waiting on the upper side, and each receiving chuck moves in the laterally separating direction. The fabric can be stretched to the left and right in the lifted state, and then the upper edge of the stretched fabric can be transferred onto the transport conveyor so that the fabric can be transported to the next process side in the stretched state. It has become.

  And the said cloth back surface expansion apparatus and an air blow apparatus function as follows, respectively. During operation, the conveyor and the left and right expansion belts are continuously running, but the air blower operates intermittently at the timing described later.

  In the state where the upper edge of the stretched fabric is transferred onto the conveyor, the back of the hanging portion of the fabric is in contact with the front of the left and right expansion belts. Since the vehicle travels outward in the left and right directions (the front surface of the expansion belt is in sliding contact with the back surface of the cloth), the cloth back surface portion in contact with each expansion belt is pulled outward in the left and right directions. Then, the cloth upper edge is sent in the back direction by the traveling of the conveyor, so that the hanging part of the cloth is sequentially pulled up, while the back of the cloth is in sliding contact with the front surface of each expansion belt. Since it is pulled up (while being expanded outward from the left and right), the back surface of the fabric is expanded cleanly over the entire surface.

  On the other hand, the air blow device for expanding the front of the fabric blows air from the left and right nozzles diagonally outward to the left and right immediately after the upper edge of the stretched fabric is transferred onto the conveyor. (The blown air is blown in the direction of expanding to the left and right outer sides with respect to the front surface of the cloth.) As the sagging portion of the cloth is pulled up sequentially, the front surface of the cloth covers the entire surface. Neatly expanded. In addition, even if two sheets of cloth are inflated due to air entering between the fabrics on the front and back, if air is blown to the front of the cloth with an air blower, the air pressure against the front of the cloth The air between the front and back fabrics is eliminated, and both the front and back fabrics are brought into contact (or close proximity) over the entire surface, and the fabric front side fabric is further flattened (the wavy portion is eliminated).

  Therefore, when the entire length of the fabric is transferred onto the conveyor, the front and back surfaces of the fabric are in a clean stretched state with no wrinkles or wavy portions, and the next step (pressing step) ) Side.

  In addition, the cloth spreading and conveying machine of the present invention can be used without any problem even when a single piece of cloth such as a sheet is stretched, but in particular, a futon wrapping cloth (one with a rounded portion or one with a bag shape). It is suitable for spreading fabrics having two overlapping parts such as

  The cloth spreading conveyor of the present invention has the following effects.

  (1) Since the cloth in the stretched state can be expanded from the front and back sides to the left and right by the cloth back expansion device and the air blow device for expanding the front of the cloth, the front and back surfaces of the cloth It can be expanded with no wrinkles or wavy parts, and can be processed into stretch fabrics with good finishing accuracy.

  (2) Since air is blown toward the left and right diagonally outwards with respect to the front of the cloth, it can be expanded while pushing the wrinkles and wavy parts on the front of the cloth to the left and right outside, and the front of the cloth And undulations are less likely to remain.

  (3) Even when air enters and swells between the two overlapping portions of the cloth, the air can be excluded from the opening of the two overlapping portions by blowing air on the front surface of the cloth. Even a cloth having a stacked portion can be stretched without swelling.

  (4) Since the front of the cloth can be expanded to the left and right by blowing air, the cloth is placed between the cloth rear expansion device (expansion belt) and the air blow device (each nozzle) for expanding the front of the fabric. Sufficient space for passing the cloth can be secured, and even if the cloth is expanded from the front and back both sides to the left and right, it does not hinder the cloth passage.

  Hereinafter, with reference to FIGS. 1-8, the cloth extension conveyance machine of an Example of this application is demonstrated. The cloth spreading and conveying machine of this embodiment can spread one piece of cloth such as a sheet without any problem, but in particular, a cloth having a two-ply portion such as a futon wrapping cloth is spread. It is suitable for making it happen.

  1 to 3 includes a loading device 1, a left and right stretching device 2, a suction device 3, a delivery device 4, a transport device 5, a fabric back surface expansion device 6, and a fabric. The air blow device 7 for extending the front surface is a basic configuration. The feeding device 1, the right and left extension device 2, the suction device 3, and the delivery device 4 have substantially the same structure as that of Patent Document 1 (Japanese Patent Laid-Open No. 2001-159067).

  The feeding device 1 has a pair of feeding chucks 11 and 11 for gripping both end corners Sa and Sa of one side of the cloth S to be stretched, and each of the feeding chucks 11 and 11 is moved up and down (rodless cylinder). 12 can be moved up and down.

  The input chucks 11 and 11 are juxtaposed to the left and right at intervals of about the shoulder width of a person. Each of the feeding chucks 11 and 11 has a low position (height in FIGS. 1 and 3) which is the height of the feeding operation by the lifting device 12 and a high position (a cloth holding portion of the cloth) where the entire cloth can be suspended. And a height that can be transferred to a receiving chuck 21 described later). Then, at the low position, after the both end corners Sa, Sa on one side of the cloth are gripped by the respective input chucks 11, 11 (the cloth is in a state of S ′ in FIG. 1), the lifting device 12 It can be raised to the delivery height.

  In this embodiment, two feeding devices 1 are provided on the left and right sides so that cloths can be fed from any of the feeding devices 1 and 1. In addition, in the standby state, each of the loading devices 1 and 1 is located at each position distributed left and right from the center of the width of the machine body as shown in FIG. It moves to the center position of the width of the aircraft.

  The left and right extension device 2 has a pair of receiving chucks 21 and 21 that receive both end corners Sa and Sa of the cloth from the respective input chucks 11 and 11 of the input device 1 at a predetermined height position. 21 can be moved in the left-right direction by left and right motion devices (using a reversible servo motor) 22 and 22, respectively. As shown in FIG. 1, the receiving chucks 21 and 21 are waiting at the same interval as the intervals between the input chucks 11 and 11 of the input device 1 in the center of the width of the machine body in the standby state. After receiving Sa and Sa (the state of S ″ in FIG. 1), the left and right moving devices 22 and 22 are moved left and right outwards until the upper side of the fabric is tensioned (the fabric S is lifted and extended in FIG. 1). State).

  The suction device 3 is provided with an intake box 31 at a position below the portion where the receiving chucks 21 and 21 move to the left and right and capable of sucking air in the intake box 31 with an intake fan 33. A switching damper 36 is provided in the intake passage 32 that connects the intake box 31 and the intake fan 33. When the switching damper 36 is located on the side of the reference numeral 36 'shown in FIG. The inside of the box 31 is sucked by the intake fan 33. In addition, at the upper end of the front wall of the intake box 31, two left and right feeding rollers 34, 34 are provided. The feeding rollers 34 and 34 are rotated in the feeding direction at predetermined timings by motors 36 and 36, respectively.

  The suction device 3 rotates the feeding roller 34 in the feeding direction and sucks the inside of the intake box 31 when the fabric S is in the stretched and lifted state, thereby lowering the lower side of the fabric S in the stretched and lifted state. Over the feed roller 34 and sucked into the air intake box 31. At that time, a tension action acts on the lower side of the cloth, and the function of causing the cloth S in the stretched and lifted state to stretch downward is generated.

  The delivery device 4 includes a suction box 41 that receives the upper edge portion of the cloth S supported by the receiving chucks 21 and 21 while being stretched and lifted, and an air cylinder 43 that moves the suction box 41 back and forth. ing. A large number of small holes are formed in the upper surface (cloth receiving surface) of the tip of the suction box 41. By suctioning the inside of the suction box 41 with an intake fan 42, the upper edge of the cloth is placed on the cloth receiving surface. Can be adsorbed (held). In the delivery device 4, the upper edge portion of the cloth is sucked on the cloth receiving surface while the suction box 41 is in the front position, and the suction box 41 is indicated by a chain line (reference numeral 41 ′) in FIG. 3. During the backward movement to the position, the upper edge portion of the cloth is operated so as to be transferred onto the starting end portion of the transport device 5 (suction conveyor 51).

  The conveying device 5 has a suction conveyor 51 provided with a large number of small holes on the front side, and a carry-out conveyor 52 continuous to the rear end portion. The starting end portion of the suction conveyor 51 is located in the vicinity of a position just below the rear side slightly from the front end portion (cloth receiving surface) of the suction box 41 at the front position. An air intake box 53 is installed on the lower surface of the upper surface running portion of the suction conveyor 51, and the upper edge of the cloth can be adsorbed on the upper surface of the suction conveyor 51 by sucking the inside of the air intake box 53. ing.

  In the suction box 53 on the suction conveyor 51 side, the suction fan 33 of the suction device 3 is shared, and the suction box 31 of the suction device 3 is alternatively sucked. That is, in FIG. 3, when the switching damper 36 is shown by a solid line, the intake air in the intake box 31 on the suction device 3 side stops, while the intake box 53 on the suction conveyor 51 side is sucked through the duct 54 and is switched. Is switched to the side indicated by a chain line 36 ', the intake air in the intake box 53 on the suction conveyor 51 side is stopped, while the intake box 31 on the suction device 3 side is inhaled.

  The cloth rear surface expansion device 6 has a pair of left and right. The cloth back surface expansion devices 6 and 6 have expansion belts 61 and 61, respectively. Each of the extension belts 61 and 61 is installed at each position distributed right and left from the center of the width of the machine body at a position in the immediate vicinity immediately below the start end of the suction conveyor 51. Each of the expansion belts 61, 61 is installed in a laterally long posture with the front surface being substantially vertical, and is driven by motors 62, 62 so that the front surface travels in the laterally outward direction. In addition, each outer end part of each expansion belt 61, 61 is extended to a position that protrudes outward from the left and right end parts of the cloth S in the stretched lifting position.

  As shown in FIG. 4, each of the expansion belts 61, 61 uses a breathable belt provided with a large number of small holes. And suction boxes 63 and 63 are respectively arranged on the back side of the front running portions of the respective expansion belts 61 and 61, and by sucking the inside of the suction boxes 63 and 63, cloths are placed on the front surface of the expansion belt 61. The back of the can be adsorbed. Each intake box 63, 63 is connected to an intake port of each of the air supply fans 71, 71 of the air blow device 7 described later via ducts 64, 64, respectively. The inside of each intake box 63, 63 is sucked by intake air, whereby ambient air can be sucked from each small hole in the front running portion of each expansion belt 61, 61.

  Two air blow devices 7 are used on the left and right. The air blow devices 7 and 7 have horizontally long air supply boxes 72 and 72 at positions facing the left and right expansion belts 61 and 61, respectively, at positions separated from the left and right from the center of the width of the machine body. High pressure air is supplied into the air supply boxes 72 and 72 from the air supply fans 71 and 71 through the ducts 73 and 73, respectively.

  As shown in FIG. 1, there is an interval between the inner ends of each of the air supply boxes 72 and 72 so that the cloth S ″ lifted by the charging device 1 can pass between the air supply boxes 72 and 72 in the back direction. In addition, the outer ends of each of the air supply boxes 72, 72 are positions that slightly protrude outward from the left and right ends of the cloth (reference numeral S in FIG. 1) that is stretched with the long side facing sideways. It is extended to.

  A plurality of (four in the illustrated example) nozzles 74, 74,... Are provided on the back side surfaces of the respective air supply boxes 72, 72 with a predetermined interval on the left and right. As shown in FIG. 2, each of the nozzles 74, 74,... Is installed so as to blow air A toward the front surface of each expansion belt 61 diagonally outward from the left and right. That is, the nozzles 74, 74,... Of the right-side air supply box 72 blow air A toward the far diagonally outward side of the right, and the nozzles 74, 74,. Air A is blown out toward the back side diagonally to the left.

  An interval L (FIG. 4) that allows passage of the cloth S between the back side surfaces (tips of the nozzles 74) of the air supply boxes 72 and 72 and the front surfaces of the expansion belts 61 and 61 is provided therebetween. Have. This interval L is preferably as small as possible so that the air A blown from the nozzle 74 can be effectively blown onto the front surface of the cloth, but the cloth S is allowed to pass as described above. For this purpose, the distance L is preferably set to about 10 to 30 cm, for example.

  Compressed air is intermittently supplied into each air supply box 72, 72 from each air supply fan 71, 71 at a predetermined timing. The air supply fans 71 and 71 are continuously operated during operation. In this embodiment, air supply to the air supply boxes 72 and 72 is intermittently controlled as follows. That is, in this embodiment, air supply switching chambers 75 and 75 are provided between the ducts 73 and 73 and the air supply fans 71 and 71, respectively, and the air supply switching chambers 75 and 75 are respectively provided in the ducts 73. A valve device is provided in which a switching valve 76 that opens and closes and a switching valve 77 that opens and closes to the outside air are mounted on a common shaft. These switching valves 76 and 77 are simultaneously opened and closed by one actuator 78. When the switching valve 76 on the duct 73 side is “closed”, the switching valve 77 on the outside air side is “open”. Conversely, when the switching valve 76 on the duct 73 side is “open”, the switching valve 77 on the outside air side is “open”. It is installed to be “closed”. Therefore, the air supply fans 71 and 71 are continuously operated during operation, but the air supply fans 71 and 71 are in operation for a time range in which air blowing from the nozzles 74, 74,. Air can be supplied to the boxes 72 and 72.

  By the way, as the cloth S to be stretched by the cloth stretcher, there is a cloth having two overlapping portions such as a futon wrapping cloth in addition to a single cloth such as a sheet. Further, as cloths having two overlapping portions, those having a rounded portion Sc shown in FIG. 12 (A), and a bag shape (opening Sd only on one side edge) shown in FIG. 12 (B). There is. When the cloth S having the rounded portion Sc is stretched, when the rounded portion Sc is lifted and stretched in a posture facing the front side (for example, the posture in FIG. 8), all four of the sides When air A is blown out from the nozzles 74, 74,..., Air blown out from the innermost nozzle 74 is blown between the front and back fabrics from the opening of the rounded portion Sc, and air remains between the front and back fabrics. Problem arises.

  Therefore, in this embodiment, the innermost one of the four nozzles 74, 74,... Of each of the air supply boxes 72, 72 can be opened and closed. That is, in this embodiment, as shown in FIGS. 2 and 8, the innermost nozzles 74, 74 on the left and right sides can be opened and closed by the damper 79. When the bag-like cloth S shown in FIG. 12 (B) is processed, it is performed with all the four nozzles 74, 74,... On each side opened as shown in FIG. When the cloth S having the rounded portion shown in FIG. 8A is processed, the innermost nozzles 74 and 74 are closed by the dampers 79 and 79 as shown in FIG. In addition, as a closing method of each innermost nozzle 74, 74, a cap may be put on the nozzle 74 instead of the damper.

  Next, an operation method of the cloth spreading and conveying machine of this embodiment will be described. In the usage example of FIGS. 1 to 7, the case of processing the bag-like cloth S shown in FIG. 12B is shown, but in FIG. 5 to FIG. It is indicated by a single line (actually, the cloth S is a two-sided stack as shown in FIGS. 2 and 4).

  In the initial state during operation, as shown in FIG. 5, the air supply fans 71, 71 on each side are operating, the switching valve 76 on the duct 73 side is “closed”, and the switching valve 77 on the outside air side is “ The air is sucked into the front surface of the expansion belt 61 (there are many small holes) through the duct 64 and the air intake box 63. The front surface of each expansion belt 61 is constantly inhaled during operation. The suction fan 33 of the suction device 3 is also operating, but the switching damper 36 is in the position shown by the solid line, and the suction box 53 on the suction conveyor 51 side is sucked. The current air flow is indicated by a solid line arrow and a dotted line arrow, and a two-dot chain line arrow indicates the air flow direction after switching. Further, the motors 62 of the left and right cloth rear surface expansion devices 6 and 6 are also operated, and the respective expansion belts 61 and 61 are traveling (the front surface is traveling left and right outside). Further, the suction conveyor 51 and the carry-out conveyor 52 are also continuously running.

  First, as indicated by reference numeral S ′ in FIGS. 1 and 5, both end corners Sa and Sa of one side of a large-sized fabric are searched, and the both end corners Sa and Sa are used as the respective input chucks 11 of the input device 1. , 11 respectively. At this time, in the bag-like cloth S shown in FIG. 12 (B), the corners Sa and Sa on any one side having no opening Sd (closed edge) are searched and held. When the start button is pressed, the input chucks 11 and 11 move upward while gripping the cloth end corners Sa and Sa (at this time, the cloth S ′ enters between the left and right air supply boxes 72 and 72. The both end corners Sa and Sa are transferred to the receiving chucks 21 and 21 of the left and right extension device 2 (in the state of reference sign S ″ in FIGS. 1 and 5), and the receiving chucks 21 and 21 are separated from each other left and right. The upper side of the fabric is stretched (state S in FIG. 1), during which the fabric S enters between the expansion belts 61 and 61 and the air supply boxes 72 and 72. Since there is an interval L (FIG. 4) between the front surface of the expansion belt 61 and the rear surface of the air supply box 72, there is no problem in the cloth S expanding operation.

Next, as shown in FIG. 5, the feeding roller 36 rotates at a high speed in the feeding direction, and the switching damper 36 is switched to the side of the chain line (reference numeral 36 ') to suck the air in the intake box 31 (2 dash-dotted arrows), the lower end of the cloth is drawn into the intake box 31 (the state of the letter S ₁ designates in Figure 5). At this time, a downward tension is applied to the cloth S ₁ by the suction action of the intake fan 33, and the cloth is stretched in a square shape. Thereafter, the switching damper 36 ′ is switched to the side indicated by the solid line (the suction box 53 of the suction conveyor 51 is sucked), the receiving chucks 21 and 21 are opened, and the upper side portion of the cloth is the tip of the suction box 41. is adsorbed and held on the side upper surface (cloth receiving surface) (the state of the letter S ₂ designates in Figure 6).

Subsequently, adsorption box 41 is retracted to the chain line shown (reference numeral 41 ') in FIG. 6, then the cloth upper portion is ERROR on the suction conveyor 51 (the state of the sign S ₃ in FIG. 6). At this time, the back of the cloth S ₃ is in contact with the front surface of each of the left and right extension belts 61 and 61. Also, almost simultaneously with the transfer of the upper side of the cloth onto the suction conveyor 51, as shown in FIG. 7 from the state of FIG. 6, the actuator 78 of the air supply switching chamber 75 is operated to switch the duct 73 side. The valve 76 is “open” and the switching valve 77 on the outside air side is “closed”, and the air supply from the air supply fan 71 is blown out from the nozzles 74, 74... Through the duct 73 and the air supply box 72.

In this state, as shown in FIG. 4 and FIG. 7, the back surface (double back fabric) of the fabric S ₃ is sucked by the front surface of each of the expansion belts 61 and 61 by the suction conveyor 51 and is in sliding contact. However, as the front surfaces of the respective expansion belts 61 and 61 run to the left and right sides, the fabric back surface (the portion that is in sliding contact with the front surface of the expansion belt) is forcibly forced to the left and right outer sides. To be expanded. On the other hand, on the front side of the cloth S _3, as shown in FIG. 2, it is blown out air A toward the right and left outer side from each of the nozzles 74, 74 ... of the air box 72, 72 on each side As a result, the front surface (two-layer front fabric) of the cloth is forcibly extended to the left and right outer sides in sequence by the respective blown air A. In addition, when air A is blown on the front surface of the cloth, as shown in FIG. 4, an action of pressing the front fabric against the front surface of the expansion belt 61 occurs, thereby eliminating air between the front and back fabrics from the opening Sd. Thus, the two-layered fabric comes into contact (or close proximity) in a flat shape over the entire surface.

  As described above, when the cloth rear surface expansion device 6 and the air blow device 7 for expanding the entire surface of the cloth are expanded from the front and rear sides of the cloth to the left and right outer sides, the cloth S in a two-layer state is obtained. However, both the front and back fabrics can be finished in a clean state with no wrinkles or undulations. The stretched fabric S that is pulled up onto the suction conveyor 51 is transferred onto the carry-out conveyor 52 as it is, conveyed to the press machine side, and pressed by the press machine. At that time, since there are no wrinkles or undulations on the front and back surfaces of the fabric and there is almost no air between the two stacked fabrics, the fabric can be pressed neatly and the finish is improved (folding) Does not occur).

  The usage example shown in FIG. 8 is for processing the fabric S having the rounded portion Sc shown in FIG. In the cloth S with the rounded portion Sc, when the corners Sa and Sa on one side are searched and gripped by the feeding chucks 11 and 11 of the feeding device 1, the rounded portion Sc is positioned on the front side. There are things to do. Therefore, when processing the cloth S with the rounded portion, each innermost one nozzle 74, of the four nozzles 74, 74.. 74 is closed. That is, the dampers 79 and 79 are set in the “closed” state so that air does not blow out from the innermost nozzles 74 and 74.

  In this way (FIG. 8), when the innermost nozzles 74, 74 of the air supply boxes 72, 72 on each side are closed, even when the rounded portion Sc is extended in a posture facing the front side, Since the blown-out air A does not enter from the opening of the rounded portion Sc, the space between the doughs of the two overlapping portions does not swell with air. In addition, even if it is the cloth S with a round-off part, each function of the cloth back surface expansion apparatus 6 and the air blow apparatus 7 can fully exhibit similarly to the above.

It is a front view of the cloth extension conveyance machine of an example of this application. It is an II-II arrow line view of FIG. It is the III-III arrow line view of FIG. It is IV-IV expanded sectional drawing of FIG. It is operation | movement explanatory drawing of the cloth extension conveyance machine of FIG. FIG. 6 is a state change diagram from FIG. 5. FIG. 7 is a state change diagram from FIG. 6. It is the FIG. 2 equivalent view which shows the other usage example of the cloth spreading | contracting conveyance machine of FIG. It is a front view of the cloth extension conveyance machine of the 2nd public knowledge example. FIG. 10 is an operation explanatory diagram of the cloth spreading and conveying machine of FIG. 9. It is a state change figure from FIG. It is each top view of two types of cloth which should be processed by this application.

Explanation of symbols

  1 is a feeding device, 2 is a left-right stretching device, 3 is a suction device, 4 is a delivery device, 5 is a transport device, 6 is a cloth rear surface expansion device, 7 is an air blow device, 11 is a feeding chuck, 21 is a receiving chuck, 22 Is a lateral movement device, 61 is an expansion belt, 71 is an air supply fan, 72 is an air supply box, 74 is a nozzle, S is a cloth, and Sa is a cloth corner.

Claims (1)

Each corner (Sa, Sa) of one side of a large-area cloth (S) such as a sheet or a futon wrapping is lifted to a predetermined height while being gripped, and each gripping part (Sa , Sa) are separated from the left and right, and the cloth (S) is stretched in a lifted state, and then the cloth (S) in the stretched and lifted state can be transported to the next process side. There,
A cloth back surface expansion device (6) having left and right expansion belts (61, 61) that slide in contact with the cloth back surface and expand the cloth back side to the left and right sides on the back surface side of the stretched fabric (S). )
An air blow device (7) for expanding the front side of the cloth, which blows air toward the left and right diagonally outward with respect to the front face of the stretched and suspended cloth (S) at a position facing each of the expansion belts (61, 61). )
This is a fabric stretcher.

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