JPS6314786Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an automatic towel hem sewing machine, and in particular, an automatic towel hem sewing machine that folds the hem portion of a towel cut into one piece into three before sewing. Regarding the tri-folding device of the machine.

[Conventional technology]

Conventionally, as shown in FIG.
By horizontally moving the work ruler 130 to the outside of the hook 131, insert the guide ruler 121 below the guide ruler 121.
The lower edge corner of the moving side of the hook 131 of No. 1 is chamfered to make it easy for the hook 131 to enter.

[Problem that the invention attempts to solve]

However, a guide ruler that is too thick is not suitable for making neat trifolds, and there are restrictions on the size that can be scraped off by chamfering.For this reason, especially thick sports towels and printed towels cannot be used with hooks. Even if you try to insert it under the guide ruler 121, the hook 131 may not bite into it enough, and if the force of the driving source such as an air cylinder is weak, it may not be possible to perform secondary or tertiary folding, and the operation of the sewing machine may stop. It was hot.

[Means for solving the problem] The present invention was devised in view of the above circumstances, and the tri-folding device of the automatic towel hem sewing machine is installed on the side of a horizontal work surface having a substantially rectangular shape. an elongated guide ruler supported on the edge in a cantilever manner at one end parallel to the side edge at intervals approximately the thickness of a towel; and adjacent to the outside of the side edge at approximately the same level as the work surface. a work ruler that is arranged parallel to the guide ruler and has a hook attached to the lower side of the side edge through a block for vertical movement and horizontal reciprocating movement; and a work ruler that moves the work ruler vertically and horizontally. a drive source; a steady rest ruler that moves in synchronization with the vertical movement of the work ruler and takes a steady rest position for the guide ruler in horizontal movement; a drive source that controls the operation of the steady rest ruler; A first clamp means for holding down the inner towel, and a towel hem is moved around the guide ruler by the upward movement, inner horizontal movement, downward movement, outer horizontal movement, and return movement of the working ruler. In the trifold device for an automatic towel hem sewing machine, the trifold device for an automatic towel hem sewing machine comprises a second clamp means for pushing the trifold hem portion, moving the hem portion to the free end of a guide ruler, and pulling the hem portion out from the guide ruler; an actuating plate that abuts a part of the bottom surface of the guide ruler on a portion of the side edge, and an actuating plate that abuts a portion of the bottom surface of the guide ruler; It is characterized in that an actuating means is provided below the side edge portion to lift the guide ruler before reaching the position and to return the guide ruler downward after entering the guide ruler. In addition, this invention is
Even with thick towels such as sports towels and printed towels, make sure that the hook of the work ruler is placed under the guiding ruler so that the towels can be folded into second and third folds. A three-fold automatic sewing machine for towel hems, which is provided with an actuating plate that directly or indirectly contacts a part of the bottom of a guide ruler, and an actuating means that lifts the actuating plate below the working surface by more than the thickness of the hook. The purpose is to provide equipment.

[Effect]

The elongated guide ruler is supported parallel to the side edge of the horizontal work surface having a substantially rectangular shape at intervals of approximately the thickness of the towel, so that the hem of the towel can be folded into three. The towel is sandwiched between the side edge portion and the side edge portion, thereby defining the primary folding line and the secondary folding line of the hem portion. By placing the portion of the hem portion to be folded into three in parallel with the elongated guide ruler, neat three-folding is possible. The first clamp means holds the installed towel so that it does not shift while the towel is being folded into three. The work ruler is arranged parallel to the guide ruler on the outside of the side edge of the work surface at almost the same level, via vertical and horizontal movement blocks, and has a hook on the lower side of the side edge. First, the outwardly protruding portion of the hem portion is supported from below and moved upward by a drive source, and the tip of the hook moves horizontally inward until it passes the guide ruler, and the upper surface Perform the primary folding work on the guide ruler. Next, it moves downward under its own weight (if necessary, for example, by supplying pressure air for balance to the lower side of the air cylinder of the drive source for balance), and then performs outward horizontal operation while pressing the folded hem part with the underside of the hook. Using the tip of the hook, the primary folded hem portion is inserted below the guide ruler to perform the secondary and tertiary folding operations at the same time. At this time, the cantilevered guide ruler is held steady by the steady rest ruler, and the tertiary folding line is regulated by the tip of the hook. Before the tip of the hook inserts the hem, the actuating plate that is in direct or indirect contact with a part of the bottom of the guide ruler is lifted by at least the thickness of the hook using the actuating means, so that the tip of the hook is inserted into the hem. To make it easier to insert the towel under the guide ruler. By reversely operating the work ruler and the hook, the work ruler and the hook return to their original positions before the primary folding work. The second clamp means moves while holding the hem portion folded in three, and pulls it out from the free end of the guide ruler supported in a cantilevered manner, and also presses it from above to prevent the trifold from collapsing when pulling out.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the trifold device for an automatic towel hem sewing machine according to the present invention will be described below with reference to the drawings.

Figures 1 a to e are explanatory diagrams showing the operating procedure of the tri-folding device of this embodiment, Figure 2 a is a front view of the tri-folding device, Figure 2 b is a plan view, and Figure 2 c is a FIG. 2D is a perspective view of the vertical and horizontal movement block for operating the working ruler, and FIG.

1e and 2a-d, the tri-folding device of the present invention will be described only for tri-folding one towel hem a. The trifold device 100 is installed in a trifold work area Q between a towel installation area P of an automatic towel hem sewing machine and a sewing area S where a sewing machine SM is disposed. First, in the first step, the towel A is cut one by one by a cutting machine or manual scissors from a long towel fabric connected through the threads, and is placed on a horizontal work surface 111 having a substantially rectangular shape. On the tri-folding device 100 having
As shown in FIGS. 1a and 2b, the hem part a is sandwiched between the side edge 112 of the work surface and the elongated guide ruler 121 so as to be perpendicular to the longitudinal direction of the hem part a. The part to be folded into three is the side edge 112
The work ruler 130 is installed parallel to the guide ruler 121 on the work ruler 130 which is arranged on the outside of the horizontal work surface 111 at the same level. This installation may be done by hand directly at the tri-folding location Q, but the conveyor belt 11 including the side edge portion is placed at the installation location P shown in FIG. 2b.
2, 113, 114 may be used to transport the paper to the tri-folding place Q. Since the elongated guide ruler 121 is held by a support plate 122 which is supported in a cantilevered manner so as to be lifted up by pivoting with an interval approximately equal to the thickness of the towel, it is easy to move the hem portion a below the support plate 122. Can pass. The towel A, which is placed in a state before the start of regular tri-folding, is held down on the work surface 111 by the clamp 142 of the first clamp means 140 operated by the air cylinder 141. Next, as a second step, the work ruler 130 is moved upward as shown in FIG. A primary folding process is performed in which the portion to be folded is turned back. The movement of the working ruler 130 is regulated by a vertical movement block 150 and a horizontal movement block 150, as shown in detail in FIG. 2c. That is, the vertical slider 152
operates along a vertical rail 151' on a base 151 fixed to the workbench 110 under the driving force of an air cylinder 153, and a horizontally moving slider 154 is provided on a vertically moving slider 152, The work ruler 130 is operated by receiving the driving force of an air cylinder 155 along the horizontal guide rod 154', and the work ruler 130 is fixed on the horizontally moving slider 154 at its lower end 133. The above operation stroke of each air cylinder 153, 155 is performed until the top dead center is reached. After the first folding, in the third step, as shown in FIG. The downward motion of 175 slightly lifts the hook 131 to make it easier for the tip of the hook 131 to enter below the guide ruler 121. When the side edge portion 112 is formed of a conveyor belt as shown in FIG.
5, the lever 172 is moved slightly upward by the lever action of the lever 172. Then, as the fourth step, 1
31, as shown in Figure 1d, guide ruler 1
21, and the previously folded hem portion a is inserted under the guide ruler 121 to perform the second fold and the third fold at the same time. When the frictional resistance during this insertion operation is excessive, pressurized air that balances its own weight is supplied to the air cylinder 153. In addition, an air cylinder 13 is provided on the slider 154 to prevent the cantilevered guide ruler 121 from swinging when the hook 131 is inserted and to return the tip of the hook 131 to near the outer edge of the guide ruler 121.
6 (the primary folding is performed in synchronization with the air cylinder 155). That is, at the same time as the insertion work, the interlock air cylinder 138 attached to the slider 152 is operated, and the slider 1
A stopper 137 pivotally supported by the steady rest ruler 135 is inserted into the notch 139 at the base of the steady rest ruler 135 and the protrusion 13
5' to restrict the movement of the tip of the hook 131. The conveyor belt 112 on the side edge, which has the same width and the same position as the actuating plate 171, is moved upward by the guide ruler 12.
Since the guide ruler 121 is positioned so as to be in contact with about the outer 2/3 of the width of the guide ruler 121, when it moves upward, a gap is formed below the inner about 1/3 of the width of the guide ruler 121. Furthermore, the upper edge corner of the hook 131 of the conveyor belt 112 on the moving side is chamfered.
31 is configured so that it is easy to insert the towel below the guide ruler 121. When the tip of the hook 131 enters below the guide ruler 121, the air cylinder 175 is actuated to lower the conveyor belt 112 by lowering the operating plate 171. After the tri-folding is completed, the interlock air cylinder 138 is returned to its original position, and in the fifth step, the working ruler 130 performs a return operation that is exactly the opposite of the previous tri-folding operation, and then returns to the first position.
It returns to the position shown in Figure a before the start of tri-folding. At the same time as the return, a reed switch disposed on the air cylinder 153 operates the air cylinder 141 to remove the hem portion a folded in three from the guide ruler 121 as shown in FIG. 140 and at the same time actuate the air cylinder 160' to clamp the second clamping means 16 consisting of a circumferential conveyor belt 165.
The rotating conveyor belt 165 constituting 0 is driven by a power source motor M that rotates the conveyor belts 112 and 113, and a drive wheel 164 thereof is operated via transmission wheels 161, 162 and a timing belt 163. It is pulled out from the free end of the trifold guide ruler 121 while being pinched in synchronization with the conveyor belts 112 and 113, and is moved toward the next sewing operation. Regarding this movement, on October 3, 1980, the present applicant published ``Conveyance Switching System in Semi-Automatic Towel Hem Sewing Device''.
as disclosed in the specification and drawings of the patent application. The arrow directions shown in FIGS. 1a to 1e indicate the locus of movement of the movable parts to the next process. In this embodiment, the tri-folding device 100 for one towel hem has been described, but the same tri-folding device 100 can also be installed symmetrically on the other side of the workbench 100 to perform tri-folding for both hems at the same time. It does not depart from the scope of the present invention to do so.

〔Effect of the invention〕

As described above, according to the towel hem tri-folding device 100 of the present invention, tri-folding is performed using one guide ruler 121 and one work ruler 130 that are held steady by the steady rest ruler 135. By lifting the guide ruler using the actuating plate, it is possible to perform the three-folding process faster and more reliably, which greatly improves the reliability of the automatic towel hem sewing machine. Become.

[Brief explanation of drawings]

FIG. 1a is an explanatory diagram showing the towel installation state, which is the first step of the operation of the tri-folding device according to the present invention;
Figure 1b is an explanatory diagram showing the primary folding state of the hem part due to the operation of the work ruler in the second process, and Figure 1c is an explanatory diagram showing the downward movement of the work ruler and the upward movement of the side edge in the third process. FIG. 1 d is an explanatory diagram showing the secondary folding and tertiary folding states of the work ruler in the fourth step, and FIG. 1 e is an explanatory diagram showing the return of the work ruler and the first clamping means in the fifth step. An explanatory view showing the operating state of the second clamping means, FIG. 2a is a front view of the tri-folding device according to the present invention, FIG. 2b is a plan view of the same, and FIG. FIG. 2d is an explanatory view of the lifting operation means for the guide ruler, and FIG. 3 is an explanatory view of a conventional tri-folding device. Explanation of symbols, 100...Tri-folding device for towel hem, 111...Horizontal work surface, 112...Isolateral edge (conveyor belt), 121...Elongated guide ruler,
130...work ruler, 131...same hook, 13
5... steady rest ruler, 142... first clamp means, 150... horizontal movement block, 152... vertical movement slider, 153, 155... drive source, 16
0... Second clamping means, 171... Actuation plate, 1
72,175... Actuation means, A... Towel, a...
…towel hem.

Claims (1)

[Scope of utility model registration request] an elongated guide ruler supported in a cantilevered manner at one end parallel to the side edge of a horizontal work surface having a substantially rectangular shape with an interval approximately the thickness of a towel; A work ruler having a hook installed on the lower side of the side edge side, which is arranged parallel to the guide ruler through a block for vertical movement and horizontal reciprocation adjacent to the outer side at almost the same level as the work surface. ,
a drive source that moves the work ruler vertically and horizontally;
a steady rest ruler that moves synchronously with the vertical movement of the work ruler and takes a steady rest position for the guide ruler in its horizontal movement; a drive source that controls the operation of the steady rest ruler; and a drive source that controls the operation of the steady rest ruler; A first clamp means for holding down, and a hem portion that is folded into three by the upward movement, inner horizontal movement, outer horizontal movement, and return movement of the working ruler so as to cover and surround the guide ruler. In the tri-folding device of an automatic towel hem sewing machine, the device comprises a second clamping means that presses the hem portion, moves the hem portion to the free end of the guide ruler, and pulls the hem portion out from the guide ruler. an actuating plate that directly or indirectly abuts a portion of the bottom surface of the ruler; and lifting the actuating plate by at least a thickness greater than the thickness of the hook before the working ruler moves horizontally outward and reaches the guide ruler position; A three-fold device for an automatic towel hem sewing machine, characterized in that an actuating means for returning downward after entering below the guide ruler is provided below the side edge.