JPS5924541Y2 - Contact device for roller printing machine - Google Patents

Description

[Detailed description of the invention] The present invention is a roller type printing machine that is configured to print on printing paper inserted between the roller and type by pressing and rolling a printing roller against the type surface. The present invention relates to a sensor that detects the insertion of the printing paper and causes the printing roller to perform a printing operation, and a contact device for a roller printing machine whose purpose is to prevent interference (collision) with the printing roller.

In printing machines such as time stamps that are designed so that the die plate type can be installed on the back side of the machine compared to normal type (wheel type), if the die plate type is removed and used, the printing paper A problem arises in which printing is not possible on the upper edge side.

If you want to print toward the top edge of the paper, you can print by setting the sensor mentioned above so that it protrudes toward the front side of the print stand by the width of the removed die plate type, but if you set the sensor like this, In this case, the leading end of the sensor protrudes onto the printing conveyance path of the printing roller, and when the printing roller operates, it interferes with this protruding sensor, causing a problem in which printing becomes impossible.

Conventionally, as a solution to the above-mentioned problem, the printing roller is divided into die plate 1, one for type and one for normal type, and when the die plate type is not used depending on the usage conditions of the customer etc., the printing roller for the divided die plate type is Actions such as removing the print roller were taken.

When the printing roller for die plate type is removed in this way, the sensor can be set so as to protrude above the printing table by that amount, making it possible to print all the way to the top of the printing paper. Performing post-processing modifications such as removing the printing roller each time depending on the customer's usage conditions is very time-consuming, inefficient, and extremely wasteful.

Therefore, the present invention is configured so that after the sensor detects the insertion of printing paper, the sensor is automatically moved backward from the printing roller conveyance path by the action of a cam.
It is an object of the present invention to provide a contact device for a roller printing machine that can prevent interference between the printing roller and the sensor that occurs during printing. It is now possible to print all the way to the top of the printing paper without the need for modification at the tip.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, 1 is a printing stand that is attached to the lower side of printing time stamps, etc. so as to face type (not shown).The drive shaft 2 and interlocking shaft 3 installed on the left and right sides of the inside of the printing stand 1 have two sheets each. Sprockets 2a, 2b, 3a, and 3b are attached, and endless chains 4 and 4' are hung between the left and right opposing sprockets 2a and 3a, and between 2b and 3b, respectively.

The output of the motor is connected to the drive shaft 2 via a reducer, a clutch, etc. (none of which are shown), and when the motor is activated, the endless chains 4, 4' rotate counterclockwise in FIG. Transport and rotate in the direction.

Reference numeral 5 denotes a roller bracket connected between the endless chains 4, 4' via a link or the like, and this bracket is provided with guide surfaces 1a, l of the printing table 1 by the conveyance operation of the chains 4, 4'.
A plurality of independent printing roller groups are installed, each consisting of left and right guide rollers 6 and 6' that roll on b, a printing roller 7 for ordinary type, and printing rollers 7a and 7b for die plate type. A printing roller group consisting of rollers 7.7a and 7b prints by pressing printing paper (not shown) inserted from the direction of arrow a in FIG. be able to.

8 is a sensor, and its tip 8a receives the inserted printing paper.
The side protrudes onto the printing roller conveyance path of the printing table 1, and the plate end side rotates toward the upper plate 9 fixed to a body (not shown) of a time stamp or the like so as to cover the upper surface side of the printing table 1. It is pivoted freely.

FIGS. 3 and 4 are detailed views of the same, in which a portion of the upper plate 9 corresponding to the printing stand 1 and a portion corresponding to the operation of the sensor 8 are each made into a large opening 9', and the plate end side of the sensor 8 is provided with a large opening 9'. It is rotatably fixed by a screw 11 overlapping a movable piece 10 along the inner surface of the piece 9.

The movable piece 10 has a head 12' attached to a slide fixing screw 12 that protrudes upward from the slide groove 9a of the upper plate 9, and this fixing screw 12 moves along the slide groove 9a as shown in FIG. By tightening, the tip 8a side of the sensor 8 can be set at an arbitrary position on the printing table 1, and the amount of insertion of printing paper can be adjusted.

Reference numeral 8b indicates a hole drilled in the plate end of the sensor 8 for loose insertion of the screw 11, and 8C and 18C indicate two actuating pieces vertically disposed in parallel to the plate end of the sensor 8.

Reference numeral 13 denotes a contact lever, the upper part of which is sandwiched between the operating pieces 8C58C of the sensor 8, and a leg piece 13a hanging down at one end is pivoted to the side of the printing table 1 by a shaft 14, and the leg piece 13a is hung down at the other end. The leg piece 13b is pivotally supported on the body side using the mounting hole 13b'.

This contact lever 13 is rotated by the actuating piece 8C58C when the sensor 8 is rotated by inserting the printing paper, and turns on a switch (not shown) that starts the motor of the drive shaft 2, thereby starting the printing roller assembly. Printing can be activated.

Reference numeral 15 denotes a pressurized piece connected to the leg piece 13a of the contact lever 13, and a piece body 15a is attached to the tip of this pressurized piece 15, and the piece body 15a protrudes into the rotation range of the cam disk 16. ing.

The cam disk 16 is connected to the printing table 1 by a shaft 18 together with a spur gear 17.
The pinion 19 attached to the outer end of the interlocking shaft 3 meshes with the spur gear 17.

Therefore, when the drive shaft 2 is rotated by the motor and the endless chains 4, 4' rotate the interlocking shaft 3, the cam disc 16
rotates and presses the piece body 15a during the rotation,
The entire contact lever 13 can be rotated in the direction of the arrow in FIG. 2 using the shaft 14 as a fulcrum.

Furthermore, when the contact lever 13 is rotated as described above, the sensor 8 is pushed, and rotates in the direction of arrow C in FIG. It is possible to avoid rotation of the tip side that was protruding onto the roller conveyance path.

The above-described reduction ratio between the spur gear 17 and the pinion 19 is such that while the printing roller assembly completes one printing operation,
The spur gear 17 is designed to rotate once.

Further, the contact lever 13 is moved to the first position after the pressing force of the cam disc 16 is released.
A spring (not shown) attached to the lever 13 provides the return force to return to the original position shown in the figure.

Furthermore, a wide tapered part 13' is formed at one end of the contact lever 13, and when the printing operation of the sensor 8 is held between the tapered part 13', that is, the tip 8 of the sensor 8 When the ' side protrudes deeply toward the front of the printing table 1, when the contact lever 13 is rotated, the amount of avoidance of the sensor 8 increases as shown in Figure 5, and the sensor 8 is moved to a position where it does not need to be avoided. When the sensor 8 is set, that is, when the sensor 8 is moved to the rear of the printing table 1 and the actuating piece 8C58C is inserted into the thin part of the contact lever 13, the sensor 8 is moved by the contact lever 13 as shown in FIG. The structure is such that the amount of avoidance is extremely small.

Since the contact device of the present invention has the configuration described above, when the printing paper is inserted and the sensor 8 is pressed and rotated, the contact lever 13 first disengages the clutch (not shown) and switches (not shown). 1), the motor is started and the endless chains 4, 4' are conveyed and rotated, and the printing roller assembly starts the printing operation.

The printing roller assembly is initially located below the printing table 1, but is conveyed above the printing table 1 by the conveying action of the endless chains 4, 4 as shown in FIG.

When such an operation is performed, the spur gear 17 meshed with the pinion 19 rotates in conjunction, and the cam disc 16 also starts rotating.

When the cam disk 16 rotates, the contact lever 13 rotates due to the pressing action of the cam, and the sensor 8 is rotated from above the printing table 1 as shown in FIG. 2, thereby avoiding collision with the printing roller assembly.

Therefore, the printing roller assembly can perform a printing operation without being interfered with by the sensor 8, and can print on the printing paper.

When the printing operation of the printing roller assembly is completed, the pressing action of the cam disc 16 applied to the contact lever 13 side is released, and the contact lever 13 is moved to the first position by the action of a spring or the like.
The rotation of the motor is stopped by returning to the original position shown in the figure, and the sensor 8 is also returned to its original position by means of the contact lever 13 in preparation for the next printing.

As explained above, according to the present invention, when the printing roller assembly starts printing, the sensor automatically avoids the printing conveyance path of the printing roller assembly by the action of the contact lever pressed and rotated by the cam disk to prevent interference. This makes it possible to use the sensor protruding above the printing conveyance path of the printing roller assembly, and therefore, even if the die plate type attached to the back side of the regular type is removed due to the customer's usage conditions, etc. By shifting the position of the sensor toward the insertion direction of the printing paper, that is, toward the front of the printing bed, it is possible to print from the top edge of the printing paper, and to prevent interference with the sensor, the printing roller It was possible to omit troublesome post-processing work such as removing the printing roller for die plate type from the assembly.

Furthermore, due to the above structure, this invention eliminates the need to separate the printing roller into rollers for ordinary type and die plate type, and has the advantage of being able to print both ordinary type and die plate type at the same time with a single printing roller. It is suitable for use in roller printing units such as time stamps and time recorders.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view showing the main parts of a roller printing machine implementing the device of the present invention;
FIG. 2 is a perspective view schematically showing the operating state of the sensor and contact lever during printing, and FIG. 3 shows the structure of the sensor mounting portion. FIG. 4 is a sectional view, FIG. 4 is a plan view, and FIGS. 5 and 6 are plan views illustrating the rotation state of the sensor by the contact lever. 1... Printing stand, 4, 4'... Endless chain, 7゜7a, 7b... Printing roller, 8
...Sensor, 13...Contact lever,
15... Pressure piece, 15 a... Piece body,
16...cam board.

Claims (1)

[Scope of utility model registration request] A plurality of printing roller groups capable of independently pressing these plurality of type groups are mounted on a printing table facing a plurality of type groups consisting of ordinary type and die plate type, and are rotatably conveyed. When the leading edge of the printing paper inserted between the print roller group and the print roller group presses the sensor, a contact lever connected to this sensor is activated to transport and rotate the print roller group on the printing table, which prints the printed characters. In a roller printing machine configured to perform appropriate printing on the printing paper between a group of printing rollers and a group of printing rollers, the sensor is capable of protruding onto the roller conveyance path of the printing table, and the contact point A pressurized part connected to one end of the lever is made to protrude into the rotation range of a cam disk that rotates in conjunction with the conveyance rotation of the printing roller group, and the cam disk is activated after the sensor detects that the printing paper is inserted. , a roller printing machine characterized in that the entire contact lever is rotated by pushing the pressurized portion, and the sensor connected to the lever can be operated to avoid the roller conveyance path of the printing table. contact device.