JPS5938112B2 - Skage device in automatic screen printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scage device that reliably switches two cages in reverse using the tensile force of a roller chain for driving the scage. The present invention relates to a scage device capable of maintaining reverse switching and uniform scage pressure.

In the scage device of an automatic screen textile printing machine, two scages are usually held by a scage carrier that strokes within a guide frame, and print by running in a direction perpendicular to the traveling direction of the fabric to be dyed. The one at the front of the screen in the direction of travel is lifted upwards to maintain a gap with the screen surface, and the one at the rear is pushed down to apply a predetermined cage pressure.

In addition, the running direction of the scales alternates in the opposite direction every time the endless belt that intermittently conveys the cloth to be dyed and the cloth to be dyed is fed, and accordingly, the two scales alternately repeat upward and downward pressurization. This is necessary. In the above-mentioned conventional scage device, the vertical reversal operation of the two scages in the running direction is achieved by (a) using the tensile force of a driving roller chain, or (b) by providing a reversing rail of a certain length. Commonly used methods include forcibly inverting the two cages by using

However, in the device using the tensile force of the chain in (a), there is a drawback that the scage may run without being fully downwardly pressurized, and complete scage pressure is not ensured, and the reversal in (b) In devices equipped with paper rails, the reversal and pressure of the cage are good, but each time the print width changes, it is necessary to replace the reversal rails for all colors with ones of a length that corresponds to the print width. , This has the disadvantage that it takes a long time and labor, resulting in a decrease in the operating rate.

That is, an object of the present invention is to eliminate the above-mentioned drawbacks in the up-and-down reversal operation of the scage using the tensile force of the driving roller chain, and to provide a scage device that can maintain reliable reversal switching and uniform cage pressure. It is in.

Another object of the present invention is to smoothly and reliably invert and switch the two scales even when changing the scanning distance of the scale according to the print width, and to maintain a constant scale pressure while the scales are running. The object of the present invention is to provide a cage which is retained and the reaction force of the cage is effectively locked.

According to the present invention, there is provided a scourge carrier having a pair of squages, a guide frame for supporting the scourge carrier in a scanning manner, and a drive chain for driving the scourge carrier in a scanning manner, and the tensile force of the one drive chain is provided. In an automatic screen printing machine that reverses and switches a pair of cages by
A cam roller that can be moved a certain distance by the tensile force of a drive chain, a cam that engages with the cam roller and rotates as the cam roller moves, a gear that rotates together with the cam, and a rack that is provided on the scale. and the cam and the cam roller are engaged in such a manner that a certain pressing force is applied to the scale by the rotation of the cam when the scale carrier starts, and the reaction force of the scale is locked during running. An object of the present invention is to provide a staking device for an automatic screen textile printing machine, which is characterized by:

In the device of the present invention, the tensile force of the cage and drive chain is used not only to move the cage carrier, but also to reverse and switch the cage at the start of the movement.

For this purpose, a cam roller is provided in the cage carrier which can be moved a certain distance by the tension of the chain. Preferably, the scale carrier is provided with a sliding shaft slidably supported by a bearing, a cam roller is rotatably attached to the center of the sliding shaft, and both ends of the sliding shaft are driven. A stop is provided that connects the chain and makes contact with the cage carrier. With this configuration, upon starting, the sliding shaft, and therefore the cam roller, move a certain distance, and the cam and gear rotate accordingly, causing the scage to move downward.

A stop provided at the end of the sliding shaft has the function of limiting the travel distance of the cam roller and transmitting the tensile force of the drive chain to the cage carrier after the cam roller has traveled a certain distance. By placing the cam in a central position between the two cages and by engaging the gear on each side of each of the racks of the two cages, the raising of one of the cages and the lowering of the other cage are effected. This is done simultaneously using a simple mechanism.

When the cage carrier is stopped, it is desirable to position both cages at an intermediate position between the raised position and the lowered position for smooth operation.

For this reason (this sliding shaft is made hollow except for its central part,
Each of the two hollow parts is provided with a long hole extending in the sliding direction of the spring-drawing sliding shaft, and a spring retaining pin is fixed to the bearing by penetrating the sliding shaft through the long hole. , the spring is housed so that one end thereof engages with the stop pin and the other end engages with the cam roller. Further, the cam tip part has a structure having a recessed part in the center and flat parts at both ends, and is provided in a positional relationship such that the central recessed part and the cam roller engage with each other when the vehicle is stopped, and the flat parts and the cam roller engage with each other when the vehicle is running. Further, the five drive chains are supported by a pair of sprockets provided at both ends of the guide frame, and one of the sprockets is connected to the skege drive mechanism via a magnetic clutch that is released when the skee is stopped. When this configuration is adopted, the cam roller is always maintained at the neutral position by the action of two springs installed in the sliding shaft when the cage carrier is stopped.
As a result, both scales are also located at an intermediate position between the raised position and the lowered position.

The present invention will be described in detail below based on specific examples shown in the accompanying drawings.

In FIGS. 1 and 2 showing the main parts of a textile printing machine, an endless belt 6 for supporting and conveying a cloth 7 to be dyed is movably supported on a machine stand 1 by means known per se.

A pair of guide rails 3 are provided on both sides of the endless belt in its longitudinal direction, and a printing unit 40 is provided on these guide rails so as to be movable in the longitudinal direction of the machine. This guide rail 3 is provided so as to be movable up and down via a rigid shaft 2 by a known lifting device (not shown). The printing unit 40 consists of a pair of guide frames 14, 14 extending transversely to the endless belt 6, which are attached to support the screen 8 and the scanning cages 15A, 15B. A drive device 10 and a motor 9 for the cage are provided at one end of the guide frame 14, and a chain case 39 is provided at the other end, and a chain 12 for driving the cages 15A and 15B is housed inside the chain case 39. There is. Chain cases 39, 3 are also provided at both ends of the other guide frame 14.
9 is provided, and a chain 12 is similarly provided therein.
is accommodated. When conveying the cloth 7 to be dyed, the guide rail 3 and the printing unit 40 placed on the guide rail are raised by the hard shaft 2, and in this state, the cloth 7 to be dyed is transferred to the hard shaft 2 after the endless belt 6 has stopped. As a result, the guide rail 3 and the printing unit 40 are lowered, and the screen 8 comes into contact with the cloth 7 to be dyed.

In this state, the motor 9 is driven and the scales 15A, 15
B scans in the transverse direction to exude colored paste (not shown) on the screen onto the cloth 7 to be dyed, thereby performing a printing operation. In this case, the running direction of the scales alternates in the opposite direction every time the cloth to be dyed 7 and the endless belt 6 that intermittently transports it are fed, and accordingly, the two scales 15A, 1
The rising and falling pressurization of 5B will be repeated alternately. According to the present invention, with the above-described configuration, such reversal switching of the cage is reliably performed, and moreover, it is possible to maintain a uniform cage pressure with respect to the screen surface during printing operations. The third part showing the detailed structure of the present invention
In the figure, a sliding shaft 16 is connected to the roller chain 12 by a joint 32 inside the cage carrier 13, and is slidable in the advancing direction of the cage carrier 13.
There is also a bearing 17 that supports this.

As shown in the cross-sectional view, the sliding shaft 16 is hollow except for its central portion, and a spring 18 is located inside the sliding shaft 16. Further, a retaining pin 19 for the splinog 18 is press-fitted and fixed into the bearing 17 through the sliding shaft 16, and a long length is provided on the sliding shaft 16 so that the sliding shaft 16 can slide against the pin 19. A hole 20 is provided.

In Figure 3, only the right half is shown in cross section, but
These are symmetrical and the left half has a similar structure.

The sliding shaft 16 is provided with a pin 21 at its center, and a roller 22 is fitted to the pin 21 so as to be freely rotatable.

On the other hand, there is a shaft 23 rotatably supported above the center of the cage carrier 13, and a cam 24 and a gear 25 are connected to the shaft 23.
is fixed, and the roller 22 and gear 25 are engaged with racks 26, which are part of the cage pressure regulating mechanism 27, on the left and right sides of the cam 24 and the roller 22 and the gear 25, respectively. There are two brake parts on the upper part of the cage carrier 13, which are composed of a brake shoe 29, a spring 30, and a set screw 31 (FIG. 4). On the other hand, the drive device 10 has the contents shown in FIG.

That is, there is a worm 35 directly connected to the motor 9, a worm gear 36 that meshes with the worm 36, and a magnetic clutch 37 that can be switched between engagement and release.
is coupled and driven, and when released, the sprocket 11 is also in a free state.

As mentioned above, the motor 9 starts and the cage carrier 11
3 starts running to the right.

At this time, in FIG. 3, (1) the cage carrier 1
3 maintains a stationary state, and adjusts the strength of the stationary force with the brake 28.

(2) The sliding shaft 16 slides to the right as indicated by the arrow in response to the movement of the roller chain 12.

(3) When the sliding shaft 16 moves by a distance of 1, the cushioning material 33
(An elastic body such as rubber or urethane) comes into close contact and pulls the cage carrier 13 to the right to start running.

(4) The roller 22 at the center of the sliding shaft 16 also moves to the right by l in the same way as the sliding shaft, and rotates the cam 24 at the top by an angle θ as shown by the chain line.

(5) The gear 25 integrally attached to the cam 24 similarly rotates in the direction of the arrow by an angle θ, and passes through the rack 26 to the cage pressure regulating mechanism 27 and the cage 15A attached thereto.
Press down.

(6) On the right half side of Figure 3, the scale 15B is opposite to the above.
The scale carrier 13 is lifted upward.
runs and performs printing work. (7) Drive device 10
The magnetic clutch 37 located at the front is connected to ON before the motor 9 is started, and provides starting force to the sprocket 11 at the same time as the motor 9 is started.

(8) The cage carrier 13 travels to the right and stops at the right stroke end.

At this time, the magnetic clutch 37 is also turned 0FF at the same time as the motor 9 is turned 0FF, or after a very slight delay, and the sprocket 11 is set free. (9) Sprocket 1
1 becomes free, due to the restoring force of the compressed spring 18 on the inside right side of the sliding shaft 16, the sliding shaft 16 moves to the left by the original distance l with respect to the stopped cage carrier 13, and becomes a neutral state. becomes.

(Substitute) The brake part 28 has a brake shoe 29 in its innermost part, and a spring 3
0 to the inner surface of the guide frame 14, and adjusts the strength of the static force of the cage carrier 13 and the following movement.

(b) During printing, the apex of the roller 22 maintains a state in which it rides on the flat part of the cam 24, suppressing the reaction force of the scage 15A and maintaining constant pressure.

02) When the cage carrier 13 travels in the opposite direction, all of the above operations act in the opposite direction.

By the above-mentioned operation, the above-mentioned excellent effects can be obtained, accurate printing is possible, and the operational efficiency can be greatly improved.

In the above detailed explanation, the two scales 15A and 15B are in a neutral state at the end of the stroke due to the action of the magnetic clutch 37 in the drive device 10, but it is not possible to use the magnetic clutch. Of course, by directly connecting the worm gear 36 and the sprocket opening 1 through the shaft 38, operation without the above-mentioned neutral state is also possible.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of the scage device of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a C-C diagram in FIG. 2.
FIG. 4 is a detailed view of the scale carrier, and FIG. 4 is a cross-sectional view taken along line DD in FIG.
The figure shows the BB cross section in FIG. 2, that is, the cross section of the drive device, where reference numeral 1 is the machine base, 2 is the hard shaft, 3 is the rail,
4 is a scage device, 5 is a surface plate, 6 is an endless belt,
7 is a cloth to be dyed, 8 is a screen, 9 is a motor, 10 is a drive device, 11 is a sprocket, 12 is a roller chain,
13 Skage carrier 1, 14 guide frame, 15
A, 15B are scales, 16 is a sliding shaft, 17 is a bearing, 1
8 is a spring, 19 is a spring fixing pin, 20 is a long hole, 21 is a pin, 22 is a roller, 23 is a shaft, 24 is a cam, 25 is a gear, 26 is a rack, 27 is a scale pressure regulating mechanism, 28 is a brake , 29 is a brake shoe, 30 is a spring, 31 is a push screw, 32 is a joint, 33 is a buffer material, 35 is a worm, 36 is a worm gear, 37 is a magnetic clutch, 38 is a shaft, 39 is a chain case, 4
0 indicates a printing unit.

Claims (1)

[Scope of Claims] 1 A cage carrier having a pair of cages, a guide frame supporting the cage carrier in a scanning manner, and a driving chain for scanningly driving the cage carrier, the driving chain In an automatic screen printing machine that reverses and switches a pair of scages by the tensile force of a drive chain, a cam roller that is engaged with the cam roller and that can be moved a certain distance by the tensile force of a drive chain is included in the cage carrier. A cam that rotates as the cam roller moves is provided, a gear that rotates together with the cam engages a rack provided on the scage, and the cam and the cam roller are connected to each other when the cam rotates when the cam roller starts. A scage device for an automatic screen textile printing machine, characterized in that a constant pressing force is applied to the scage by the scage, and the scage is engaged so that the reaction force of the scage is locked during running. 2. The staking device according to claim 1, wherein the cam is provided at a central position between two skees, and the gear engages each of the racks of the two skeses on both sides thereof. 3. The scage carrier has a sliding shaft that is slidably supported by a bearing, a cam roller is rotatably attached to the center of the sliding shaft, and both ends of the sliding shaft are used for driving. 2. The cage device according to claim 1, further comprising a stop connected to the chain and in contact with the cage carrier. 4. The sliding shaft is hollow at least at both ends, each of the two hollow parts has a spring and a long hole extending in the sliding direction of the sliding shaft, and the spring retaining pin is inserted into the long hole. The spring is fixed to the bearing by passing through the sliding shaft, and the spring is housed so that one end thereof engages with a stop pin and the other end engages with a cam roller. 3. The staking device according to item 3. 5. The scage device according to claim 1, characterized in that a brake mechanism that engages with the guide frame is provided at at least one location on the scage carrier. 6 The tip of the cam has a recessed portion at the center and flat portions at both ends, and is provided in a positional relationship such that the central recessed portion and the cam roller engage with each other when the vehicle is stopped, and the flat portion and the cam roller engage with each other when the vehicle is running. A scage device according to any one of claims 1 to 5, characterized in that: 7. The drive chain is supported by a pair of sprockets provided at both ends of the guide frame, one of the sprockets is connected to the scale drive mechanism via a magnetic clutch that is released when the scale stops, and the cam roller 7. The scage device according to claim 1, wherein the drive chain returns to the neutral position by becoming free when the scage stops.