JPS6212626Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feed pawl device with a height adjustment mechanism in a single-piece printing machine.

Single-piece printing machines are used to print list prices on price tags attached to items such as clothing.

Price tags and the like that are printed by this type of printing machine are small and relatively thick single pieces, so the single pieces may warp. In addition, a thin string for attaching to clothing is usually attached in advance before printing. Furthermore, since it is printing a list price, etc., it is often necessary to print on a relatively small amount of single pieces of various sizes. For this reason, special measures are required for the feeding mechanism and the like.

First, the basic configuration of a single-piece printing machine proposed by the inventor of the present invention will be explained with reference to FIG.

A plate holder 1 is provided with a hopper 2, and the hopper 2 accommodates a large number of single pieces 3 such as price tags. The hopper 2 consists of a positioning member 20, a bottom plate 21, and a rear presser plate 22. The single piece 3 is pushed up by the bottom plate 21 from below, and the positioning member 20
It is positioned by From the rear, the single piece 3 is held down by a rear holding plate 22 for regulating displacement. Among the single pieces housed in the hopper 2, the uppermost single piece 3a is sent to the plate holder 1 via the hopper gate 5 by the single piece feed claw 4. The hopper gate 5 prevents the feeding of two single pieces 3. Above the plate holder 1, there is provided a print head 6 that moves up and down with respect to the plate holder 1, and an ink tray 7 that moves forward and backward into the movement space of the print head 6 for each print. The print head 6 transmits the rotation of the motor to an output shaft via a gearbox, clutch, etc., and is moved up and down under the control of a disc-shaped control cam provided on the output shaft.
The printing head 6 is loaded with a cheese box for holding rubber type and the like. Similarly, the ink tray 7 is moved left and right by controlling the output of the motor with a control cam and via a link mechanism. The printed single piece is received in the single piece receiving device 8.

Next, the operation of the single-piece printing machine described above will be explained. The single piece 3a in the uppermost position is conveyed to the plate holder 1 by the feed claw 4, and is ready for printing (FIG. 1a).

The ink tray 7 advances into the moving area of the print head 6,
The characters in the check box of the printing head 6 are brought into contact with the ink tray 7, and so-called inking is performed (FIG. 1b).

When the ink tray 7 is retracted, the print head 6
is lowered and the single piece 3 placed on the plate holder 1
A is printed (FIG. 1c).

When printing is completed, the printing head 6 is raised, and the single piece 3b to be printed next is sent by the feeding claw 4, and the printed single piece 3a is pushed by the single piece 3b and stored in the single piece receiving device 8. (Figure 1d).

The second problem with the feeding claw of such a single-piece printing machine is
This will be explained with reference to the figures.

The feed claw 4 is driven by a drive unit 41 to advance and retreat between the hopper 2 and the plate holder 1. The feed pawl 4 has a hanging portion 4a on the lower side, and a stepped sliding portion 4e is provided at a horizontal position in the center. This sliding part 4
e, the hopper 2 slides while being guided by the guide surface 20a provided on the upper surface of the positioning member 20.
Therefore, the height of the feed pawl 4 is kept constant, and when the feed pawl 4 returns, the bottom surface of the hanging portion 4a and the top surface of the single piece 3 rub, causing the hanging portion 4a of the feeding pawl 4 to rub.
was the main cause of wear. If the hanging portion 4a wears out, it will not engage with the side surface of the single piece 3 in the thickness direction, and there is a possibility that feeding errors may occur.

In addition, since the height of the feed claw 4 is kept constant,
It is difficult to adjust the opening degree of the hopper gate 5, and in fact, no conventional single-piece printing machine has a mechanism for adjusting the opening degree of the hopper gate.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a feed pawl for a single-piece printing machine that has a height adjustment mechanism that allows the height of the feed pawl to be freely adjusted and reduces wear during return.

To achieve the above object, the present invention provides a feed pawl device with a height position adjustment mechanism in a single piece printing machine, which comprises a positioning member for regulating the position of the uppermost single piece against which the uppermost single piece is pressed; A single piece hopper that pushes up multiple single pieces from the bottom side engages with the side surface in the thickness direction of the uppermost single piece to feed the single pieces one by one to a printing position, A feed pawl device for a single-piece printing machine that performs printing includes a feed pawl that is pivotally supported by a transfer portion that advances and retreats between the single-piece hopper and a printing position and has a hook portion that engages with the single piece, and a feed pawl that pivots the feed pawl. a biasing means for biasing the feed claw in the direction of the single piece; and a biasing means that is provided to be able to move back and forth to a fixed position and that is in contact with the feed pawl urged by the biasing unit, and a limit of the single piece direction of the feed pawl. and an adjustment means for adjusting the height position.

According to the above structure, the object of the present invention can be completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

3 and 4 are a plan view and a side view showing an embodiment of a feed claw device having a height position adjustment mechanism in a single-piece printing machine according to the present invention, and FIG. 5 is a tip of the feed claw of the device according to the present invention. It is a side view showing a part in detail.

The feed claw 4 is a claw for feeding the uppermost single piece of the single pieces pushed up from the hopper one by one to the plate holder 1 via the hopper gate. The feed claw 4 is composed of a hanging portion 4a, a first guide side 4b, a second guide piece 4c, and an escape groove 4d. The hanging portion 4a has an inclination angle slightly rearward from perpendicular to the moving direction of the feed pawl 4, projects by a height t, and engages with the side surface of the single piece 3 in the thickness direction.
The relief groove 4d is provided so that the hanging portion 4a can securely catch the single piece 3. The first guide piece 4b is a small single piece warp guide and has an angle α with respect to the direction of movement. The second guide side 4c is a guide for large single piece warping,
It has an angle of β with respect to the direction of movement.

The single piece 3 is held down from behind by a rear holding plate 22,
It is pushed up from below by a bottom plate 21. The uppermost single piece 3a of the single piece 3 is regulated by a positioning member 20 that regulates the upper position of the single piece. The tip of the positioning member 20 cooperates with the plate holder 1 to form a hopper gate 5.

The feed claws 4 are provided at three locations corresponding to the narrow grooves of the positioning member 20, and one feed claw is provided depending on the size of the single piece 3.
~ Sent with three claws.

It is pivoted on a shaft 42 of the transfer section 41 and biased in the direction of the single piece 3 by a leaf spring 43 screwed onto the transfer section 41 from above. This leaf spring 43 is a weak spring, and it is sufficient for the feed pawl 4 to return to the position where it hangs on the side of the rear end of the single piece 3 from its initial position.

An adjustment screw 44 is provided behind the feed pawl 4, and the reference position of the feed pawl 4 is set by the screw 44. By rotating the screw 44, the feed pawl 4 rotates around the pivot 42, and the limit height position of the hanging portion 4a of the feed pawl 4 can be adjusted.

FIG. 6 is a diagram for explaining the operation of the embodiment of the feeding pawl of the single-piece printing machine according to the present invention.

FIG. 6a shows the operation of the feed claw 4 when it returns from the plate holder 1 to the rear end of the hopper section. The movement of the feed pawl 4 toward the single piece 3 is restricted by a screw 44, but it is given a degree of freedom in the clockwise direction. Therefore, when returning, the upper surface of the single piece 3 does not come into contact with the hanging part 4a by rotating clockwise, but returns while making contact with the jaw part 4e, so that there is no wear on the hanging part 4a.
Figures 6b and 6c show an example of feeding a thick single piece. When sending a thick single piece, it was impossible to send a single piece that was thicker than the sum of the limit height tg of the hanging part 4a and plate holder 1 and the height t of the hanging part 4a (Fig. 6b). . In such a case, advance the screw 44 and release the feed pawl 4.
By rotating clockwise to raise the height of the hanging portion 4a, the single piece 3 also rises by that amount, so that even thick single pieces can be fed (FIG. 6c).

As explained in detail above, according to the present invention, the forward end of the feed pawl rises during return and there is no friction between the hanging part and the single piece, so there is no wear on the hanging part. Additionally, since the limit height of the feed claw in the single direction can be adjusted, it is now possible to feed thick single pieces.

[Brief explanation of drawings]

Figure 1 is a diagram for explaining the basic configuration of a single-piece printing machine, Figure 2 is a side view showing the principle of the feed pawl, and Figures 3 and 4 are the feed pawl of the single-piece printing machine according to the present invention. A plan view and a side view showing an embodiment of the device, FIG. 5 is a side view showing the tip of the feed pawl in detail, and FIG. 6 shows the operation of the device embodiment of the feed pawl of a single-piece printing machine according to the present invention. It is a figure for explaining. 1... Plate holder, 2... Hopper, 20... Positioning member, 21... Bottom plate, 22... Rear press plate, 2
3... Spring, 3... Single piece, 4... Feed claw, 4a...
...hanging part, 4d...relief groove, 4e...sliding part, 5
...Hopper gate, 6...Printing head, 7...Ink tray, 8...Single piece receiving device, 41...Transfer section,
42...shaft, 43...leaf spring, 44...adjustment screw.

Claims (1)

[Scope of utility model registration request] It has a positioning member that regulates the position of the uppermost single piece against which the uppermost single piece is pressed. In a feed pawl device of a single piece printing machine that engages with the side surface in the thickness direction to feed single pieces one by one to a printing position and perform printing, a pivot is attached to a transfer part that moves back and forth between the single piece hopper and the printing position. a feed pawl having a hook portion that is supported and engages with the single piece; a biasing means for biasing the feed pawl in the direction of the single piece around a pivot; and a biasing means that is provided so as to be movable back and forth in a fixed position. is brought into contact with the feed claw biased by the
A feed pawl device having a height position adjustment mechanism for a single-piece printing machine, characterized in that the feed pawl device comprises an adjusting means for adjusting the limit height position of the feed pawl in a single-piece direction.