JPH0143260Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a winding device used for winding up used mounts in label printers, for example.

(Prior art) In general, label printers that create pricing labels with weight, price, etc. printed on them to be attached to packaged products roll label sheets that are made by attaching a large number of labels in a line and in a removable manner to a strip-shaped mount. The labels are pulled out from a rolled-up state and fed into the printing section, where the weight, price, etc. mentioned above are sequentially and continuously printed on each label, and then the labels are issued by peeling them off from the backing paper. The peeled backing paper is configured to be wound up again into a roll using a winding device.

However, in this type of label printer, a peeling member is provided in front of the printing unit in order to peel the printed label from the backing paper, but in order to ensure the peeling, there are The backing paper must be rolled up at a speed equal to the label feeding speed in the printing section while giving an angle and holding the backing paper under tension between the peeling member and the winding device. Furthermore, the label feeding speed must be constant in order to stabilize the printing quality.
However, when the drive shaft rotated at a constant rate by a motor and the take-up roller are directly connected and driven at a constant rotation speed, the take-up speed gradually becomes faster as the take-up diameter of the liner increases, and the speed at which the label is fed by the label feed roller becomes faster. If the difference becomes large and the motor torque is strong, the label sheet will be dragged out to increase the label feeding speed, or even the sheet will be cut. Therefore, a sliding clutch is interposed between the drive shaft and the take-up roller, and the drive shaft is rotated at a faster speed so that the liner winding speed by the take-up roller is faster than the label feeding speed in the printing section. By sliding the clutch by the amount that increases the speed, the winding speed is made to follow the label feeding speed, so that they are always equal, and the liner is maintained in a tensioned state between the printing section and the winding device. I have to.

However, conventional winding devices using a sliding clutch have a construction in which a sliding clutch separate from the roller is interposed between the drive shaft driven by a motor via a belt and the winding roller. ,
Therefore, extra space is required to provide the sliding clutch, which has been an obstacle to miniaturization of printers.

(Purpose of the invention) The present invention addresses the above-mentioned problems in printer paper winding devices, and by integrally configuring a winding roller and a sliding clutch mechanism, the winding device can be made compact. The purpose is to

(Structure of the invention) The invention is structured as follows to achieve the above purpose.

That is, a clutch plate that rotates integrally with the shaft is attached to a drive shaft driven by a motor, and a take-up roller is fitted to the drive shaft so as to be relatively rotatable so that one end face faces the clutch plate, Further, a spring is installed inside the take-up roller, one end of which is pivotally supported by the drive shaft via a spring receiving member, and which presses the end surface of the take-up roller against the clutch plate.

According to this structure, a sliding clutch is formed by the clutch plate, the end surface of the take-up roller, and a spring that presses the two together, and the clutch is integrally provided with the take-up roller.

(Example) The present invention will be described below based on an example of a printer integrated into an electronic scale.

FIG. 1 shows the external appearance of an electronic scale, and the housing of the electronic scale 1 consists of a lower case 2, an upper case 3, and a printer cover 4 removably attached to one side of the front of the upper case 3. and a removable side cover 5 that covers the side surface on the printer cover 4 side.

Various keys 6...6 including a numeric keypad for inputting data such as the unit price and tare weight of the object to be weighed are arranged on the front surface of the lower case 2, as well as at the four corners of the lower surface of the lower case 2. is equipped with legs 7...7 for horizontal adjustment, and display sections on the front and rear surfaces (the rear surface is not shown) of the upper case 3 digitally display the unit price, weight, and price of the object to be weighed, respectively. 8...8 are provided.

Furthermore, a weighing pan 9 is provided above the upper case 3, and the weight of the object to be weighed placed on the weighing pan 9 is measured by a load cell (not shown) provided at the bottom of the weighing pan 9. and the price calculated based on the measured weight value, the unit price input using the keys 6...6, and the input data is displayed on the display sections 8...8. However, the printer 10 is built into the housing having the above-described structure on the side where the printer cover 4 and the side cover 5 are attached.

Next, the configuration of the printer 10 will be explained.
As shown in the figure, each component of the printer 10 is arranged on a printer frame 11 that is erected in the lower case 2. That is, in the drawing on one surface 11a of the frame 11 (the surface facing the side cover 5), the roll receiving portion 12 is provided on the right side and the printing device 13 is provided on the left side, and the roll receiving portion 12 is provided on the right side and the printing device 13 is provided on the left side. A sheet guide section 14 is provided between the receiving section 12 and the printing device 13, a winding device 15 is provided below the printing device 13, and a motor 16 is provided below the sheet guide section 14. It is being The printer cover 4 located in front of the printing device 13 has a label ejection opening 4.
A is provided.

Here, the printing device 13 is composed of a print head support device 17 and a print roller support device 18. The print head support device 17 is equipped with a print head 19, and the print roller support device 18 is equipped with a print head 19. Print roller 2 receiving head 19
0 is pivoted. Further, the printing head support device 17 holds the printing head 19 below a pressing plate 22 that is swingably supported by a frame 21, and also allows the pressing plate 22 to move integrally with a lever 23 and the lever 23. When the lever 23 is pulled out, the lock pin 24 is disengaged from the notch 21a provided in the frame 21, and the spring 25 causes the pressing plate 22 and the print head 19 to be attached to the support shaft 2.
It is designed to swing upwards around 6.
Furthermore, when the press plate 22 is pushed down while the print head 19 is located above, the print head 1
9 is pressed against the printing roller 20 located below,
In this state, the lock pin 24 engages with the notch 21a of the frame 21, thereby being locked. Further, the printing roller support device 18 is provided with a label peeling shaft 27 having a semicircular cross-sectional shape by removing the upper half of a round bar in front of the printing roller 20. The print head support device 17 and the print roller support device 18 are attached to the printer frame 11 in a cantilevered manner, and are provided between the print head 19 and the print roller 20 when the print head 19 is swung upward. The gap is configured to be open to the side cover 5 side (on the front side of the page), so that the label sheet can be inserted and attached from the side with respect to the feeding direction. Furthermore, the sheet guide section 14 is equipped with a sensor 28 for counting the number of labels pasted on the label sheet or for synchronizing label feeding and printing timing.

To further explain the winding device 15, as shown in FIG.
A drive shaft 32 has a pulley 30 fixed to one end with a screw 29 and is supported by the printer frame 11 and an auxiliary frame 31 parallel to the frame.
and a clutch plate 34 fixed to the shaft 32 with a screw 33 and one end surface 35a of the clutch plate 34.
A winding roller 35 is fitted to the drive shaft 32 so as to be relatively rotatable while facing the winding roller 3.
5 and a spring 36 installed inside. This spring 3
6 has one end supported by a spring receiving member 37 attached to the end opposite to the end to which the pulley 30 of the drive shaft 32 is attached, and the other end clutches the end surface 35a of the winding roller 35. It acts to press against the plate 34.

Here, the winding roller 35 has an axial hole 35.
A U-shaped mount presser rod 38 is provided with a hole 35b and a groove 35c, and both ends thereof are engaged with the hole 35b and the groove 35c, respectively. Then, the drive shaft 32
A belt 41 is wound around a pulley 39 fixed to the printing roller 20, a pulley 39 fixed to the printing roller 20, and a pulley 40 (shown in FIG. 2) attached to the rotating shaft of the motor 16. There is.

According to the above configuration, as shown in FIG.
4 and sent to the printing device 13. and,
When the sheet B passes between the printing head 19 and the printing roller 20 in the printing device 13, predetermined characters, such as the weight and price of the object placed on the weighing pan 9 shown in FIG. 1, are affixed to the sheet B. printed on the attached label. Then, the printed label B' is peeled off from the mount B'' when its traveling direction is changed at an acute angle by the peeling shaft 27, and is issued to the outside from the front outlet 4a. Mount B'' is the winding roller 3 in the winding device 15.
At this time, the winding roller 35
is driven via the sliding clutch mechanism 42 by the drive shaft 32 rotated at a sufficiently high speed by the motor 16, so that the liner B'' is always wound up at the same speed as the label feeding speed by the printing roller 20. This means that the mount B'' is always kept in tension without dragging or cutting the label sheet B.

Therefore, the sliding clutch mechanism 42 is connected to the drive shaft 3.
2, and an end surface 35a of the winding roller 35 facing the clutch plate 34.
Since it is constituted by a spring 36 built into the roller 35 and is provided integrally with the take-up roller 35, there is no need for a separate space for the sliding clutch mechanism 42. The sliding friction force between the clutch plate 34 and the end surface 35a of the take-up roller 35 can be adjusted by adjusting the strength of the spring 36.
In addition, if the above-mentioned sliding friction force is weak due to the winding diameter, winding speed, winding torque, etc. of the mount B'' by adjusting the spring 36 alone, a rubber drive shaft 32
Alternatively, a rubber plate may be adhesively interposed on the surface of the clutch plate 34 facing the winding roller end surface 35a or on the winding roller end surface 35a to ensure frictional force.

(Effects of the Invention) As described above, according to the present invention, in a printer equipped with a liner winding device, the winding roller and the sliding clutch mechanism in the winding device are integrally constructed, which makes it possible to Compared to the case where the sliding clutch mechanism is provided separately from the take-up roller, less space is required and the printer is made more compact.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view of an electronic scale, Fig. 2 is an enlarged side view of a printer incorporated in the electronic scale, and Fig. 3 is a line taken along the - line in Fig. 2. It is an enlarged cross-sectional plan view of the winding device cut at. DESCRIPTION OF SYMBOLS 10...Printer, 32...Drive shaft, 34...Clutch plate, 35...Take-up roller, 36...Spring, 37...
Spring receiving member.

Claims (1)

[Scope of utility model registration request] A winding device that winds a belt-shaped sheet onto a winding roller, the winding device comprising: a drive shaft driven by a motor;
a clutch plate fixed on the drive shaft; a take-up roller fitted on the drive shaft so as to be relatively rotatable and disposed such that one end face faces the clutch plate; A take-up device for a printer, characterized in that it is comprised of a spring that is internally mounted, one end supported by a drive shaft via a spring receiving member, and the other end of which presses the end face of the take-up roller against the clutch plate. .