JP2016106892A - Square cloth spreading apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a square cloth spreading apparatus in which square cloth hardly comes off when held, and a driver can be reduced in size.SOLUTION: A spreading apparatus for spreading square cloth Y into a square shape includes traverse chucks 20R and 20L for drawing the square cloth Y therein while holding one side of the square cloth Y. The chuck parts of the traverse chucks 20R and 20L are openable and closable, and each include a pair of holding pieces 21 and 22 for holding a sheet Y with their holding surfaces brought into close contact therewith. To the front end of one holding piece 21 of the pair of holding pieces 21 and 22, there is attached a press-bending plate 25 extending in a direction intersecting the holding surfaces. When the square cloth Y is held by the pair of holding pieces 21 and 22, the press-bending plate 25 presses down the cloth near the front end of the lower holding piece 21, so that the point of application of tensile force is moved to a side lower than the holding surfaces. As a result, the tensile force is not directly applied to the holding surfaces, so that the held square cloth Y hardly comes off.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rectangular cloth unfolding apparatus. In more detail, rectangular sheets such as washed sheets and wrapping cloth (duvet cover made of two fabrics), pillowcases, towels, tablecloths, etc., are expanded into squares and supplied to the next process equipment such as presses and folding machines. The present invention relates to a rectangular cloth unfolding device.

A large amount of sheets are used in hotels and hospitals, and the used sheets are generally washed and ironed in a laundry factory and used again in hotels and hospitals.
In a laundry factory, a rectangular cloth having a relatively large size such as a sheet is washed and then pressed by a press machine or folded by a folding machine. In order to supply rectangular fabrics to these processing apparatuses, it is necessary to develop the rectangular fabrics into a square shape in advance.
When a worker performs an operation of expanding a rectangular cloth into a quadrangle, a great amount of time and labor is required for the operation, and in recent years, this operation is performed by an expansion device that automatically performs this operation.

The conventional deployment device described in Patent Document 1 is generally configured as follows.
Grab one side of the square cloth with the traverse chuck and pull it onto the belt conveyor, drive the belt conveyor to hang the square cloth down the front of the machine, and use another extension chuck for the width of the square cloth Hold both ends in the direction and hang by pulling. In this state, the rectangular cloth is drawn into and discharged from the apparatus and fed into a press or the like.

Incidentally, the conventional traverse chuck is configured as shown in FIG.
The chuck portion of the transverse chuck 100 includes a pair of gripping pieces 101 and 102 that can be opened and closed. The lower grip piece 101 is fixed in a horizontal state, and the upper grip piece 102 can swing, and an air cylinder 103 is connected as a driving means.
Note that rubber plates 104 and 105 are attached to the gripping surfaces of the upper and lower gripping pieces in order to increase the frictional force against the sandwiched sheets.

  When the sheet S is sandwiched between the gripping pieces 101 and 102, the sheet S is parallel to the gripping surface when held by the gripping pieces 101 and 102 as shown in FIG. For this reason, if the weight of the sheet S is heavy, it is easy to come off, and the gripping force is increased by using the large air cylinder 103 in order to prevent dropping. However, this also causes a problem that the rubber plates 104 and 105 are easily worn.

JP 2011-30743 A

  In view of the above circumstances, an object of the present invention is to provide a rectangular cloth unfolding device that can be easily pulled down when a rectangular cloth is gripped and that can reduce the size of a driving device.

A rectangular cloth unfolding apparatus according to a first aspect of the present invention is a unfolding apparatus for unfolding a rectangular cloth into a quadrangle, and includes a traverse chuck that grabs and pulls one side of the square cloth, The chuck part is openable and closable, and consists of a pair of gripping pieces that hold the rectangular cloth with the gripping surfaces in close contact with each other. The tip of one gripping piece of the pair of gripping pieces intersects the gripping surface. A push-bending plate extending in the direction to be attached is attached.
The square-shaped cloth unfolding device according to a second aspect of the present invention is the first aspect of the invention, wherein the pair of gripping pieces are arranged vertically, and a pressing plate extending downward is attached to the tip of the upper gripping piece. Features.
According to a third aspect of the present invention, there is provided the rectangular cloth unfolding device according to the second aspect, wherein the lower gripping piece of the pair of gripping pieces is fixed horizontally, and the upper gripping piece is between the obliquely upward and horizontal positions. It is pivotally supported so as to swing, and an air cylinder for opening / closing operation is connected to the upper gripping piece.

According to the first invention, when one side of the square-shaped cloth is gripped by the pair of gripping pieces, the tensile force generated when the traverse chuck is moved by the pressing plate pushing the cloth near the tip of the gripping piece. The point of action moves downward or upward from the gripping surface. For this reason, since a pulling force does not act directly on the gripping surface, the gripped square-shaped cloth is difficult to come off. For this reason, a small drive mechanism for opening and closing the pair of gripping pieces is sufficient.
According to the second invention, when the square cloth is gripped by the pair of gripping pieces, the pressing plate pushes down the cloth in the vicinity of the tip of the lower gripping piece, so that the acting point of the pulling force is higher than the gripping surface. Move down. For this reason, since a pulling force does not act directly on the gripping surface, the gripped square-shaped cloth is difficult to come off. For this reason, a small drive mechanism for opening and closing the pair of gripping pieces is sufficient.
According to the third aspect of the invention, since the lower gripping piece is fixed horizontally, the gripping work can be easily supported when approaching the square cloth. In addition, since the rectangular cloth is difficult to come off, the air cylinder for opening and closing the upper gripping piece can be reduced in size.

It is explanatory drawing of the traverse chuck of 1st Embodiment which concerns on this invention, (A) is a side view, (B) is an effect | action explanatory drawing. It is a front view of the expansion | deployment apparatus with which this invention is applied. It is a top view of the expansion | deployment apparatus of FIG. It is a side view of the expansion | deployment apparatus of FIG. It is explanatory drawing of the transverse chuck of 2nd Embodiment, (A) is a side view, (B) is an effect | action explanatory drawing. It is explanatory drawing of the conventional traverse chuck.

Next, an embodiment of the present invention will be described with reference to the drawings.
The rectangular cloth unfolding apparatus according to the present invention unfolds a large rectangular cloth Y in a square shape such as a washed sheet or wrapping cloth (duvet cover made of two pieces of cloth), a pillow cover, a towel, a table cloth, etc. It is an apparatus for supplying to a process apparatus.
In addition, the front-back, left-right, and up-down directions of the rectangular cloth unfolding apparatus A are defined as shown in FIGS.

  In the rectangular cloth unfolding apparatus A to which the present invention is applied, an edging process for linearly extending the edge of the rectangular cloth Y, a unfolding process for unfolding the entire rectangular cloth Y into a square, A spreading process of the developed square cloth Y, a delivery process for delivering the square cloth Y after the scraping to the next process apparatus, and a subsequent discharging process are performed.

Next, the basic configuration of the rectangular cloth unfolding apparatus A will be described together with the operation.
In FIGS. 2 to 4, the stacking table 10 is a table for performing edge alignment of the rectangular cloth Y and transferring the edged cloth Y to the front. Yes. The stacking conveyor 11 includes a plurality of belts, and the rectangular cloth Y can be fed forward by these belts. The loading table 10 is longer than the long side of the rectangular cloth Y to be processed.

  In the developing device A of the present embodiment, the rectangular cloth Y is supplied from the side shown in FIGS. 2 and 3. The rectangular fabric Y may be supplied from both the left and right sides, or from the left or right side. Further, the supply method may be performed manually from the nearest place of the machine, or may be supplied from a remote place via a conveying means.

  In order to perform the edging process, a first traverse chuck 20R and a second traverse chuck 20L that are movable in the left-right direction are provided above the loading table 10. In order to perform this edging process, when the cloth is supplied from the right side of the apparatus, the rectangular cloth Y is transferred to the first traverse chuck 20R, and the first traverse chuck 20R removes the edge of the square cloth Y. This is done by moving the upper side of the loading table 10 in the left-right direction while holding it. When supplying cloth from the left side of the apparatus, the same pulling operation is performed using the second traverse chuck 20L. After completion of the edging process, the edge of the rectangular cloth Y is stretched in a straight line, and the edge is directed to the rear and is placed on the loading table 10. The present invention includes a case where only one traverse chuck is used and cloth is drawn from either the left or right side of the loading table 10.

  In order to perform the unfolding process, a pair of extension chucks 40R and 40L that are movable in the left-right direction are provided at the front end of the loading table 10. In order to perform this unfolding process, the square-shaped cloth Y after the edging is transferred forward on the loading table 10 and the rectangular cloth Y is suspended. Next, the corners of the rectangular cloth Y are held by the extension chucks 40R and 40L, and are extended in the left-right direction so that the whole is developed into a square shape. In this way, the rectangular cloth Y is developed into a quadrangle. These extension chucks 40R and 40L constitute an extension mechanism.

  A shaping duct 65 and a suction mechanism 62 are provided to perform the wrinkle removal process. In order to perform the wrinkle removal process, the upper edge of the rectangular cloth Y is held by a delivery mechanism 50 described later, and the corners of both ends of the rectangular cloth Y are gripped by the extension chucks 40R and 40L. Suction downward into the lower part.

In order to perform a delivery process, the delivery mechanism 50 and the vacuum conveyor 60 are provided, and in order to perform a discharge process, the discharge conveyor 70 is provided.
In order to perform the delivery step, the upper edge portion of the rectangular cloth Y is held by the delivery mechanism 50, and the square cloth Y is transferred to the vacuum conveyor 60 by the movement of the delivery mechanism 50. The discharge process is performed by driving the vacuum conveyor 60 and the discharge conveyor 70, and discharges the rectangular cloth Y developed in a square shape to a next process device such as an ironer installed behind.

Next, features of the present invention will be described.
In the following, a case where a sheet which is an example of a rectangular cloth is handled will be described.

FIG. 1 shows a chuck portion of the first traverse chuck 20R. The chuck portion is composed of a pair of gripping pieces 21 and 22 that can be opened and closed. The lower gripping piece 21 is fixed and is positioned horizontally. A rubber plate 21 g is attached to the upper surface of the grip piece 21.
The upper gripping piece 22 is pivotally supported by the bracket 23 and swings between a position opened obliquely upward and a position closed horizontally. A rubber plate 22 g is also attached to the lower surface of the upper gripping piece 22.

  An air cylinder 24 for opening and closing is attached to the upper gripping piece 22. When the air cylinder 24 is expanded and contracted, the gripping piece 22 swings, and when the pair of gripping pieces 21 and 22 are closed, the sheet Y can be sandwiched between the two rubber plates 21g and 22g.

  A pressing plate 25 is attached to the tip of the upper gripping piece 22. The distal end of the bending plate 25 extends downward, and the distal end of the bending plate 25 is the distal end of the lower gripping piece 21 with the pair of gripping pieces 21 and 22 closed (see FIG. 1B). It has a vertical dimension that reaches below.

  FIG. 1B shows a state where the sheet Y is gripped. The sheet Y is sandwiched between a pair of gripping pieces 21 and 22 and pressed down by a pressing plate 25. Therefore, the end portion of the sheet Y is bent in a crank shape. That is, the portion sandwiched between the upper and lower gripping pieces 21 and 22 is horizontal, the portion along the inner surface of the pressing plate 25 is vertical, and the sheet Y outside the pressing plate 25 extends horizontally.

  When the traversing clamp 20R traverses against the weight of the sheet Y in this gripped state, the action point P at which the weight of the sheet Y acts becomes the lower end of the pushing plate 25. In this case, the weight of the sheet Y does not act on the horizontal portion between the pair of gripping pieces 21 and 22. For this reason, when the sheet Y is pulled by the traverse clamp 20R, the sheet Y is difficult to come off. Therefore, it is not necessary to increase the gripping force of the pair of gripping pieces 21, 22, and a small air cylinder 24 can be used.

  In this embodiment, since the lower gripping piece 21 is fixed horizontally, it can be supported when approaching the square-shaped cloth Y, so that the gripping work is facilitated.

Next, the traverse clamp of the second embodiment will be described with reference to FIG.
In the transverse clamp of the present embodiment, a bending plate 25 is attached to the tip of the lower gripping piece 21 of the pair of gripping pieces 21 and 22. The pressing plate 25 extends upward.
Also in this embodiment, since the pulling force does not act directly on the gripping surfaces of the pair of gripping pieces 21 and 22, the gripped rectangular cloth Y is difficult to come off. For this reason, the air cylinder 24 that opens and closes the pair of gripping pieces 21 and 22 has an effect that a small one is sufficient.

Y-shaped cloth A A-shaped cloth unfolding device 10 Loading platform 11 Loading conveyor 20R, 20L Traverse chuck 21 Lower gripping piece 22 Upper gripping piece 21g, 22g Rubber plate 24 Air cylinder 25 Pressing plate 40R, 40L Extension Chuck 50 Delivery mechanism 60 Vacuum conveyor 62 Suction mechanism

Claims (3)

An unfolding device for unfolding a rectangular cloth into a quadrangle,
It has a traverse chuck that grabs and pulls on one side of the rectangular cloth,
The chuck portion of the traverse chuck is openable and closable, and is composed of a pair of gripping pieces that hold the rectangular cloth with their gripping surfaces in close contact with each other,
A rectangular cloth unfolding apparatus, wherein a push-bending plate extending in a direction intersecting the gripping surface is attached to a tip of one gripping piece of the pair of gripping pieces. The pair of gripping pieces are arranged above and below,
2. The rectangular cloth unfolding apparatus according to claim 1, wherein a pressing and bending plate extending downward is attached to a tip of the upper grip piece. Of the pair of gripping pieces, the lower gripping piece is fixed horizontally, and the upper gripping piece is pivotally supported so as to swing between diagonally upward and horizontal,
The rectangular cloth unfolding apparatus according to claim 2, wherein an air cylinder for opening and closing operation is connected to the upper gripping piece.

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