JPH0632918Y2 - Paper register for cash register - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sheet winding device for a cash register.

2. Description of the Related Art Conventionally, in a cash register, a pair of left and right shaft support pieces are integrally formed in a housing, and both ends of a take-up shaft for winding a long sheet such as journal paper are formed on the shaft support pieces. In addition, there is one in which a U-shaped cutout of an upper surface opening is rotatably fitted and one end of this winding shaft is connected to a drive unit via a gear or the like.
FIG. 9 shows an example thereof, in which the shaft portion 51 of the winding shaft 50 is fitted in the U-shaped notch 53 of the shaft support piece 52.

However, although one end of the take-up shaft 50 is connected to the drive unit and receives a restraining force, the other end is free, and therefore the take-up shaft 50 is rotated in the direction of the arrow A to rotate the paper. When 54 is wound from the printer unit, a tensile force acts on the winding shaft 50 due to the tension of the paper 54. Due to this pulling force, the shaft portion 51 is brought close to one edge 53a of the U-shaped notch 53 on the printer side and easily lifted from the U-shaped notch 53.

For this reason, as shown in FIG. 10, a hook 55 that elastically bends is attached to the shaft support piece 52, and the hook of the tip of the hook 55 prevents the take-up shaft 50 from floating, or
As shown in FIG. 11, a C-shaped pressing member 56 having a narrow mouth is attached to the shaft support piece 52, and the pressing member 56 prevents the take-up shaft 50 from rising.
However, such a thing is the hook 55 and the pressing member 56.
Must be separately formed and attached to the shaft support piece 52, which causes a problem of increasing the number of parts and the number of assembling steps.

Means for Solving the Problems A winding shaft having a winding unit for winding a long sheet discharged from the printer unit and having a driven gear fixed at one end and connected to a drive unit is provided, In the paper take-up device for a cash register, which has a pair of shaft support pieces rotatably holding the shaft portions at both ends of the take-up shaft, which are paired with the housing of the cash register, the driven gear is located. On the side of the shaft support piece U having an upper surface opening having a width substantially the same as the diameter of the shaft portion of the winding shaft.
A surface on the side on which the take-up shaft is moved by the tension of the sheet when the sheet is wound with a dimension width larger than the diameter of the shaft portion on the other shaft support piece located on the opposite side, forming a letter-shaped notch. A U-shaped notch having an upper surface opening whose position coincides with the surface of the U-shaped notch is formed, and the U-shaped notch is located above the bottom on the surface on the side where the take-up shaft is moved by the tension of the paper. A protrusion protruding inward of the U-shaped cutout is integrally formed from one edge on the printer side, and a lightening space portion that opens the lower side of the protrusion is formed.

As a result, the shaft portion of the take-up shaft is brought closer to one edge of the U-shaped notch on the printer unit side by the tension of the paper, and is pressed by the protrusion to the bottom of the U-shaped notch. Further, the protrusion narrows the opening surface of the U-shaped notch, but the U-shaped notch of the shaft support piece having the protrusion has a larger dimensional value than the diameter of the shaft portion of the winding shaft. It is possible to drop the shaft of the take-up shaft, which makes it easy to attach and remove the take-up shaft.
In particular, the shaft portion of the take-up shaft on the side where the driven gear is provided is held by the U-shaped cutout having a width substantially the same as the diameter of the shaft portion, so that the position is stable, which allows the drive to be performed. The play between the gear and the driven gear is reduced, the driving force from the drive source can be efficiently transmitted, and a thinned space is formed below the protrusion, and the U-shaped notch has an open upper surface. Therefore, the housing including the shaft support piece can be easily formed by a simple molding die having a structure including a pair of cores that are vertically aligned with each other on the parting line.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 8. As shown in FIG. 4, reference numeral 1 is a casing of a cash register fixed to the upper surface 4 of the drawer 2, and this casing 1 is formed by a molding die having a pair of cores vertically aligned with each other at a vertical line. As it is molded, it is designed so that it does not undercut in the direction of core extraction. In addition, a pair of shaft support pieces 6 and 7 for holding both ends of the winding shaft 5 are formed in a part of the housing 1 behind the printer mounting opening 3.
As shown in FIG. 5, the winding shaft 5 has a winding portion 9 that holds the journal paper 8 in a wound state, a flange 10 that expands from one end of the winding portion 9, and projects from both ends. And a driven gear 12 is fixed to the shaft portion 11 at one end. As shown in FIG. 6, the driven gear 12 is meshed with a drive gear 13 which is a drive unit.
3 is connected to a motor (not shown) mounted on the housing 1.

The shaft support piece 6 located on the drive gear 13 side is provided with a U-shaped notch 14 having an upper surface opening having a dimension width substantially the same as the diameter of the shaft portion 11, and the inner surface of the shaft support piece 7 opposite to the drive gear 13 side. Has a U-shaped notch 15 with a width slightly larger than the diameter of the shaft 11.
Are formed. The shaft supporting piece 7 having the U-shaped cutout 15 having a width larger than the diameter of the shaft portion 11 is located above the bottom of the U-shaped cutout 15 and is located on the printer side (for mounting the printer). A projecting portion 17 projecting inward of the U-shaped notch 15 from one edge 16 (on the side of the opening 3) is integrally formed, and a lightening space portion 18 that opens the lower side of the projecting portion 17 is formed. Has been done. That is, the first
As is clear from FIG. 2, FIG. 2 and FIG. 8, the lightening space 18 expands downward and the shaft support piece 7
The inside of the has a hollow shape with a lower end opening.

The drive gear 13 is engaged with the driven gear 12 in a direction away from the center of the driven gear 12 in a direction away from the opening 3 for the printer device.

In such a configuration, as shown in FIG. 6, when the drive gear 13 is rotated in the clockwise direction, the driven gear 12 is rotated in the counterclockwise direction together with the take-up shaft 5, so that the printer mounted in the opening portion 3 is rotated by the journal. Take up the paper 8. At this time, the U-shaped notch 14 that holds the shaft portion 11 on the drive gear 13 side has a uniform width, but since the driven gear 12 receives the downward driving force from the drive gear 13, the shaft portion 11 has a U-shaped notch 14. It does not float from the bottom. The shaft portion 11 on the side opposite to the drive gear 13 comes into contact with one edge 16 of the U-shaped notch 15 on the printer side by the tension of the journal paper 8 and is pressed downward by the protrusion 17. As a result, the winding shaft 5 does not float upward.

In addition, the U-shaped notch 15 of the shaft support piece 7 having the protrusion 17 has a dimension width larger than the diameter of the shaft 11 by the amount of protrusion of the protrusion 17, so that the upper portion of the U-shaped notch 15 extends from the upper part of the winding shaft 5. The shaft 11 can be dropped, and the work of attaching and detaching the winding shaft 5 is easy.

Further, the protrusion 17 narrows the mouth of the upper portion of the U-shaped notch 15, but a thinned space portion 18 that gradually expands downwardly is formed below the protrusion 17, so that the part is formed. Enclosure 1 with a simple molding die that has a core that is joined vertically with the enclosing line as a boundary
Can be molded together with the shaft support pieces 6 and 7. Third
As shown in the drawing, the same purpose can be achieved by opening the lightening space portion 18 to the side surface of the shaft support piece 7. That is, the core of the U-shaped notch 15 is to be punched out in the upper portion, and the parting line is set at an arbitrary position between the lower end 19 of the protrusion 17 and the upper end surface of the shaft support piece 7 in the lightening space 18. By this, undercut can be avoided.

Effect of Replacement Since the present invention is configured as described above, the shaft portion of the take-up shaft is brought closer to one edge of the U-shaped cutout on the printer side by the tension of the paper and is pressed by the protrusion to the bottom of the U-shaped cutout. Therefore, it is possible to prevent the take-up shaft from floating from the U-shaped notch, and the U-shaped notch of the shaft support piece having the protrusion has a dimension width larger than the diameter of the shaft part of the take-up shaft. The shaft part of the winding shaft can be dropped from the top of the U-shaped notch,
This makes it easy to attach and detach the take-up shaft, and in particular, the shaft part of the take-up shaft on the side where the driven gear is provided is held by the U-shaped cutout having a width substantially the same as the diameter of the shaft part. ,
The position is stable, which reduces the play between the drive gear and the driven gear and allows the drive force from the drive source to be transmitted efficiently. Furthermore, the protrusion has a U-shaped notch opening surface. Although it is narrowed, since a lightening space is formed below the protrusion and the upper surface of the U-shaped notch is opened, a simple structure with a pair of cores joined in the vertical direction at the parting line is used. With the molding die, it is possible to easily form the housing including the shaft support piece, and this has the effect of reducing the number of parts and the number of assembly steps.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, and FIG. 1 is an exploded perspective view showing a relationship between a shaft support piece and a shaft portion of a winding shaft in an enlarged manner as seen from the printer side. 2 is an enlarged perspective view showing the shaft support piece as seen from the opposite side of the printer section, and FIG. 3 is an enlarged perspective view showing a modification of the shaft support piece.
FIG. 4 is an exploded perspective view showing the housing and the winding shaft in a reduced size, FIG. 5 is a plan view showing the relationship between the winding shaft and the shaft support piece, and FIG. 6 is XX in FIG. Fig. 7 is a vertical sectional side view of the line section, Fig. 7 is a vertical sectional side view of the YY line section in Fig. 5, Fig. 8 is a vertical sectional side view of the ZZ line section in Fig. 5, and Fig. 9 is a conventional winding. FIG. 10 is a side view showing the support structure of the take-up shaft, and FIGS. 10 and 11 are exploded perspective views showing a conventional retainer structure of the take-up shaft. 1 ... Housing, 5 ... Winding shaft, 6, 7 ... Shaft support piece, 8 ...
... Journal paper (paper), 9 ... Winding part, 11 ... Shaft part, 13 ... Drive gear (drive part), 14, 15 ... U-shaped notch, 16 ... U-shaped notch on printer side One edge, one
7 ... Projection, 18 ... Recess

Claims (1)

[Scope of utility model registration request] 1. A winding shaft provided with a winding unit for winding a long sheet discharged from a printer unit and having a driven gear fixed at one end to be connected to a drive unit. In the sheet winding device of a cash register, wherein a pair of shaft supporting pieces for rotatably holding the shaft portions at both ends of the shaft are integrally formed with a casing of the cash register, the side on which the driven gear is located is A U-shaped notch having an upper surface opening having a width substantially equal to the diameter of the shaft portion of the winding shaft is formed on the shaft support piece, and the other shaft support piece on the opposite side has a dimension width larger than the diameter of the shaft portion. When the paper is wound, the surface on the side where the take-up shaft is moved due to the tension of the paper forms a U-shaped cutout of the upper surface opening whose U-shaped cutout is aligned with the surface of the U-shaped cutout. On the surface where the take-up shaft is brought closer by the tension of the paper, In addition, a protrusion projecting inwardly of the U-shaped notch from one edge of the printer is integrally formed, and a lightening space portion that opens the lower side of the protrusion is formed. Paper winding device for cash register.