JPH0114028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic feeding device for a screen frame in a textile printing machine, which is equipped with a textile printing cylinder mechanism driven by compressed air.

Conventionally, in automatic textile printing machines, the screen frame has been made movable on rails laid on the plate surface of the textile printing table, but its feeding has been carried out solely by manual pushing by an operator. However, this method not only has poor work efficiency, but also requires time and effort to move and stop the screen frame at regular intervals, and has the disadvantage that it cannot always be stopped at a fixed position.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an automatic screen frame feeding device configured to feed a screen frame one frame by a simple mechanism.

That is, in the automatic screen frame feeding device according to the present invention, a drive shaft is disposed in the downward longitudinal direction of the printing table, and the drive shaft is movable back and forth in the axial direction by one frame movement of the screen frame. In addition to installing air blowing couplers at each interval,
A vertical rod protruding below the screen frame is configured to support an air receiving coupler that can be engaged with or detached from a blowout coupler, and the forward movement of the drive shaft connects each coupler and separates the screen frame by one frame. The couplers are moved forward by pressing, and the couplers are separated by the backward movement of the drive shaft, and the next air blowing coupler is positioned on the front side to be joined to the air suction coupler.

This will be explained below based on the illustrated embodiments.

The illustrated printing machine consists of a printing table A on which a strip of original fabric to be printed is placed on a plate surface, and a screen frame B placed so as to run and move on the plate surface of the printing table.
It is made up of. A rail a is laid along the length of the edge of the printing stand, and a screen frame equipped with rollers b is placed on the rail. Further, a vertical rod projecting downward is attached to the side surface of the screen frame B, and by pressing this vertical rod with a feeding device described below, the screen frame is fed frame by frame. Also, screen frame B
A well-known air cylinder mechanism (not shown) is installed in the tower, and it performs prescribed textile printing operations such as shape-down, size liquid scaging, skipping, printing, and shape-up on the strip-shaped original fabric placed on the printing table A. It is beginning to be practiced. Compressed air from a compressor is supplied to the cylinder mechanism via an air tube, and the cylinder mechanism automatically performs textile printing using the compressed air.

The feeding device for the screen frame B is constructed based on a drive shaft 1 that moves back and forth in its axial direction by a length corresponding to one frame feed of the screen frame.

The shaft 1 is placed via a truck 13 on a rail 12 arranged along the longitudinal direction of the printing table on a bracket 11 below the printing table A side, and is movable back and forth. As the driving source, a mechanism that can be driven electrically, pneumatically, or hydraulically by a motor, gear, ratchet, cylinder, etc. can be adopted, but in the illustrated embodiment, an air-driven mechanism having a stroke corresponding to the frame-by-frame feed size of the printing table is used. A cylinder 14 is incorporated. This cylinder 14 is
The drive shaft 1 is configured to be moved back and forth via a branch shaft 15 that is rotatably mounted in a clockwise or counterclockwise direction. The branch shaft 15 is rotatably supported at one end by a bearing 16 attached to the leg of the printing table, and connected to the drive shaft 1 at the other end.

On the axis of the shaft 1, a plurality of air blowing couplers 2, 2, . Each coupler is mounted so as to protrude in a direction perpendicular to the axis of the shaft 1, and compressed air supplied from the compressor to an air tube 21 arranged parallel to the drive shaft 1 is connected to branch tubes 22, 22...
It is now being sent through... Note that the air tube 21 can be inserted into the drive shaft 1 in a cylindrical shape.

The blowout couplers 2, 2, . . . engage with and disengage from the air suction coupler 3. This suction coupler 3 is attached to a vertical rod 4 which is arranged to protrude below the side surface of the screen frame B.
A horizontal rod 41 projecting onto the path of movement of the blowout couplers 2, 2, . Air tube 3 from suction coupler 3
1 is pulled out, and compressed air is supplied to the textile cylinder mechanism of the screen frame A mentioned above.

A guide roll 42 is rotatably mounted on a shaft at the tip end of the horizontally rotatable horizontal rod.
This guide roll 42 acts when the drive shaft 1 moves backward and brings the next air blowing coupler 2 to the front side of the suction coupler 3. It slides into contact with the guide plates 23, 23... Further, the horizontally swingable horizontal rod 41 is arranged on the axis of the vertical rod 4.
Arm 4 protrudes with a certain opening angle.
3, there is a tension spring 44, which allows the swinging position to return to the home position from the swinging position. During the return swing, the horizontal rod 41 is stopped by a stopper 45 mounted on the axis of the vertical rod 4 so as to be engaged with the rear end thereof, and remains stationary at a fixed position.

In the illustrated embodiment, a stopper mechanism is provided to restrict the screen frame B from moving one frame forward as the air cylinder 14 is driven. This stopper mechanism includes a rotary shaft 51 arranged parallel to the drive shaft 1, and stopper pieces 52, 5 protruding from each other at regular intervals on the axis of the shaft.
2... and a drive cylinder 54 connected via a link bar 53 so as to rotate the rotating shaft 51.

Incidentally, the operation timing of the cylinders 14 and 54 that respectively drive the drive shaft 1 and the rotary shaft 51 can be controlled by a control panel (not shown) disposed on the screen frame B, for example.

When a drive start command is given to the cylinder 14 from the control panel, the cylinder 14 inserts the rod to a certain size, and moves the drive shaft 1 forward by one frame corresponding to one print of textile printing using the roller cart 13 to move the rail 12 forward. . During this movement, the air blowing coupler 2 engages with the suction coupler 3 to join each pipe to each other, and the movement of the drive shaft 1, which is still moving forward, indirectly presses the vertical rod 4 through the coupler joint, thereby closing the screen. Move frame B forward. When the rod of the cylinder 14 retracts for a certain stroke, the drive shaft 1 stops its movement and the screen frame B
stop. The stopping position of this screen frame B is
It can be controlled by a stopper mechanism. This control can be performed by rotating the stopper piece 52 in advance by driving the cylinder 54 to project onto the vertical rod movement path of the screen frame B before the screen frame B is moved to the traveling position. Stopper piece 52
are installed and arranged in accordance with the frame-by-frame movement interval of the screen frame B, so that the movement of the screen frame B can be reliably stopped by protruding and waiting in front of the movement of the vertical rod 4. When the screen frame B stops moving, compressed air from the compressor is supplied to the printing cylinder mechanism of the screen frame B through each coupler, and the printing operation is performed on the original fabric placed on the printing table A. be done.

When the textile printing work is completed, a command to end the printing work is given to the cylinders 14 and 54, respectively, from the control panel. In response to the command, cylinder 14 is actuated to eject the rod. As a result, the pipes between the couplers 2 and 3 that had been connected up until now come off, and although the screen frame B stops at the position pressed and moved by the air blowing coupler, the backward movement of the drive shaft 1 causes the next air blowing coupler to move. is brought to the front side of the suction coupler 3. During this movement, the guide roll 42 of the suction coupler 3 is pressed by the guide plate 23 attached to the tip of the next blow-off coupler 2, so that the suction coupler 3 swings toward the front side in the drawing from the movement path of the blow-off coupler 2. The swinging can be achieved by the horizontal rod 41 supporting the suction coupler 3 being rotatably attached to the vertical rod 4, and when the next blow coupler passes, the suction coupler 3 is restored by the action of the tension spring 44. The coupler 3 that has returned to the position of
will now wait until it moves forward.

During this time, the cylinder 54 operates and the stopper piece 5
2 is retreating from the movement path of the vertical rod 4 and waiting.

As a cylinder drive command mechanism from the control panel,
The screen frame B is equipped with a cylinder 6 and a Y-shaped metal fitting 61 is attached to the tip thereof, and limit engagement pieces 71 and Y are arranged at regular intervals on the axis of the wire 7 stretched in the longitudinal direction of the printing table. A mechanism for hooking the letter-shaped metal fitting 61 can be adopted. Both ends of the wire 7 are connected and tensioned to springs (not shown), so that the wire 7 can be moved back and forth. When the limit engagement piece 71 on the axis moves forward by engagement with the Y-shaped metal fitting 61, it comes into contact with limit switches arranged at appropriate intervals to operate them, and the limit switches are activated via a timer or the like. It is possible to give a timing command to operate each cylinder 14, 54 after the textile printing work on the screen frame is completed. The wire 7 is moved backward as the cylinder 6 is actuated to disengage the Y-shaped metal fitting 61 and the limit engagement piece 71, and the wire 7 is resiliently biased to its original state by springs at both ends thereof. It becomes like this.

In the embodiments shown in FIGS. 1 and 2, the drive shaft 1
Although a configuration is adopted in which the traveling mechanism is disposed on the horizontal plane of the bracket 11, it is also possible to configure it vertically (see FIG. 3). In this mechanism, rails 12', 12' are arranged on the lower surface of the printing table A and on the plane of the bracket 11, respectively, and a carriage 13' arranged vertically therebetween can be supported so as to be movable.

As described above, according to the automatic screen frame feeding device according to the present invention, its drive mechanism can be configured extremely simply, and the feeding distance for one printing can be accurately controlled. Since it is installed below the stand, it is possible to eliminate the dangers such as getting your sleeves caught or hitting your elbows during raw lining. Furthermore, since the screen frame can be moved fully automatically, it becomes possible for one worker to perform multicolor printing, thereby greatly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 shows an overall view of a textile printing machine equipped with a screen frame feeding device according to the present invention, Fig. 2 is an enlarged perspective view of the same part, and Fig. 3 is a front view of another embodiment of the automatic feeding device. It is. A...Textile printing stand, a...Rail, B...Screen frame, 1 (12, 13, 14, 15)...Driving shaft that can move back and forth, 2 (21, 22)...Air blowing coupler, 3... ...air suction coupler,
4...Vertical rod.

Claims (1)

[Claims] 1. An automatic feeding device for a screen frame that is movably placed on a rail laid in the longitudinal direction of the printing table, which feeds the screen frame one frame at a time below the printing table along the longitudinal direction. A drive shaft that moves back and forth is arranged, and air blowing couplers are arranged at regular intervals along the axis of the drive shaft to receive and discharge compressed air from the compressor.On the other hand, vertical rods that protrude vertically downward from the sides of the screen frame are arranged. At the same time, an air suction coupler that supplies compressed air to the printing cylinder mechanism of the screen frame is placed at an appropriate position so that it can engage and disengage from the air blowout coupler, and the forward drive of the drive shaft connects each coupler. At the same time, the screen frame is pushed forward by one frame, and the drive shaft is driven backward to separate the couplers, and at the same time, the next air blowing coupler is positioned on the front side so as to be joined to the air suction coupler. Automatic screen frame feeding device for textile printing machines.