JPS6227410Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll paper support structure for keeping the roll paper of a printing machine subjected to vibrations, particularly a car-mounted printing machine, in good mechanical condition.

A conventional roll paper support structure is shown in FIGS. 1 to 3. Fig. 1 is a front view of the roll paper support structure, Fig. 2 is a side view of one side of the support part of the roll paper support structure shown in Fig. 1, viewed from the direction of arrow A, and Fig. 3 shows the presser plate, which will be described later, shown in arrow B. It is a side view seen from the direction. 1 in the diagram
is a roll paper, 2 is a roll paper support shaft, 3 is a leaf spring, 4-1 is a bearing that supports the roll paper support shaft 2 and is fixed to the leaf spring 3, and 4-2 is a support for the leaf spring 3. 5-1, 5-2 are stop plates fixed to the plate spring 3, 6 is a non-slip plate fixed to the plate spring 3 and presses the roll paper 1, 7 is a presser plate, 8 is the printing machine main body, 9 1 is a printing machine cover to which a presser plate 7 is fixed, and 10 is a square hole provided in the presser plate 7. In such a structure, in order to handle and support the roll paper 1, first open the printing machine cover 9, insert the roll paper support shaft 2 into the roll paper 1,
The roll paper 1 is operated and mounted by placing it on the bearing 4-1. Next, when the printing machine cover 9 starts to be closed, the stop plate 5-2 moves inward against the leaf spring 3 due to the presser plate 7, and as the leaf spring 3 further moves, the anti-slip 6 presses the roll paper 1. When the printing machine cover 9 is completely closed, the square hole 10 of the presser plate 7
enters the protrusion of the stop plate 5-2 and becomes stable.

However, according to such a roll paper support structure, the leaf spring 3 bears the weight of the roll paper 1 and the printing machine cover 9, and when the printing machine main body 8 is subjected to vibration, the roll paper 1 may rotate or vibrate. Therefore, there is a drawback that the printed portion (not shown) is affected, resulting in poor printing quality. Further, there are disadvantages such as the inability to obtain stable pressure due to variations in the paper width of the roll paper, and the large number of parts, which requires assembly man-hours and is expensive.

The present invention was made to solve these drawbacks, and by providing recesses at both ends of the roll paper support shaft and pressing the steel balls inside the bearing against the recesses using the spring inside the bearing, the roll paper can be The purpose is to apply strong pressure while at the same time ensuring smooth movement of the roll paper, and will be explained in detail below.

4 to 6 show an embodiment of the present invention, FIG. 4 is a partially cutaway front view of the roll paper support structure of the present invention, and FIG. 5 shows the bearing shown in FIG. 4 with an arrow. C
FIG. 6 is an explanatory view of the leaf spring inside the bearing. In the figure, 1 is a roll paper, 8 is a printing machine main body, 11 is a roll paper support shaft, 12 is a conical recess provided at both ends of the roll paper support shaft 11, 13
is a steel ball, 14-1 is a bearing, and 14-2 is the bearing 14.
-1 is a countersunk hole provided in the center of the bearing 14-1, 14-3 is a protrusion provided in the bearing 14-1, and 14-4 is a protrusion 14-1.
A guide portion 15-1 is formed by 3 and supports the end of the roll paper support shaft 11, and 15-1 is formed by the bearing 14-
A plate spring 15-2 is provided inside the plate spring 15-1 and presses the steel ball 13 in the directions of arrows D and D'.
A hole 16 provided in the center is a screw for fixing the bearing 14-1 to the printing machine main body 8.

To assemble the roll paper support structure of the present invention, first the steel ball 13 and the leaf spring 15-1 are placed inside the bearing 14-1.
1 and fixing the bearing 14-1 to the printing machine main body 8 with the screw 16. After assembly, a portion of the steel ball 13 protrudes from the countersink 14-2 due to pressure applied by the leaf spring 15-1 in the directions of arrows D and D'. In such a structure, in order to handle and support the roll paper 1, the roll paper support shaft 11 is inserted into the roll paper 1, and inserted from above along the guide portion 14-4 of the bearing 14-1. When the roll paper starts to roll, the steel balls 13 are held at both ends of the roll paper support shaft 11.
is pushed outward against the leaf spring 15-1. Furthermore, when the roll paper support shaft 11 is inserted, the steel ball 1
3 completely enters the recessed portion of the roll paper support shaft 11, the repulsive force of the leaf spring 15-1 is weakened, and a stable state is reached, completing the handling of the roll paper. As a result, the roll paper support shaft 11 is rotated by the support of the guide portion 14-4 formed by the protrusion 14-3 of the bearing 14-1, and further in the direction of arrows D and D' of the leaf spring 15-1. This is done in good stability due to the repulsive force of .

In the embodiment of the present invention, the leaf spring 15 is used to obtain the repulsive force in the directions of arrows D and D', but it is clear that the purpose of the present invention can be achieved by using a coil spring. It is.

As explained above, the present invention has a structure in which recesses are provided at both ends of the shaft for supporting roll paper, steel balls are placed inside the bearing, and the steel balls are pressed against the recesses at both ends of the shaft by the springs inside the bearing, so that strong supporting force can be achieved. Since smooth rotation of the shaft can be obtained while maintaining a high temperature, a roll paper support structure that is resistant to vibrations can be obtained, and the number of parts is smaller than that of conventional systems, and the number of assembly steps can also be reduced. Furthermore, as shown in FIG. 1, the radial size of the roll paper 1 to be handled is limited by the position of the printing machine cover 9 in order to prevent it from coming into contact with the printing machine cover 9. However, according to the present invention, the roll paper 1 is The size of the paper 1 is not limited by the printing machine cover, and there is an effect that a suitably large roll paper can be handled. Furthermore, there is the effect that a constant pressure can always be obtained even when the paper width of the roll paper varies.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional roll paper support structure, Fig. 2 is a side view of the support part shown in Fig. 1, Fig. 3 is a side view of the presser plate shown in Fig. 1, and Fig. 4 is a side view of the support part of the present invention. FIG. 5 is an explanatory view showing the bearing of FIG. 4, and FIG. 6 is an explanatory view showing a leaf spring. 1... Roll paper, 11... Roll paper support shaft,
12... recess, 13... steel ball, 14-1... bearing, 15-1... spring.

Claims (1)

[Scope of utility model registration request] A recess is provided at both ends of the roll paper support shaft, a steel ball and a spring are provided inside the bearing, and a countersink is provided in the bearing for the steel ball to protrude, and the spring causes the steel ball to be attached to the roll paper support shaft. A roll paper support structure for a printing machine, characterized in that the roll is supported by pressing it against a recess.