JP2000072287A - Large type printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large type printer capable of simply and lightly mounting a heavy and large roll of paper together with a spindle to which the aforesaid roll of paper is wound, over to a spindle receiver. SOLUTION: In a large type printer using a roll of paper 3, at least paired spindle receivers 1a and 1b are provided, on which both the ends 4a and 4b of a spindle 4 in continuous length holding the roll of paper 3 are rested, at least one out of the paired spindle receivers 1a and 1b is so formed at to be capable of being revolved, one end 4a of the spindle 4 is rested on the rotatable spindle receiver 1a so as to be revolved around one spindle receiver 1a acting as a fulcrum, and the other end 4b of the spindle 4 is thereby rested on the other spindle receiver 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-sized printer using roll paper, and more particularly to a large-sized printer for printing on large-sized paper having a width of 420 mm or more.

[0002]

2. Description of the Related Art A large printer using roll paper is held by a pair of spindle receivers provided on the printer body via a spindle on which roll paper is mounted. When the roll paper runs out, the roll paper is replaced with a new roll paper. In a conventional large-sized printer, the pair of spindle receivers serving as the receiving portions are fixed. That is, the pair of spindle receivers are fixed to face each other in the same state whether the spindle is mounted or not.

[0003]

However, in a large-sized printer, the roll paper becomes large, and at the same time, the spindle on which the roll paper is mounted also becomes quite heavy.
As described above, the conventional large-sized printer has a fixed structure in which a pair of spindle receivers are opposed to each other, so that when exchanging roll paper, hold a heavy and large spindle with both arms and extend both arms forward. Both ends of the spindle on which the new roll paper is mounted are placed almost simultaneously on the spindle receiver having the fixed structure. For this reason, there is a problem that a considerable load is applied to both arms, and a large amount of labor is required for the roll paper replacement operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a large-sized printer capable of easily and lightly mounting a heavy and large roll paper and a spindle to which the roll paper is attached on a spindle receiver.

[0005]

In order to achieve the above object, an invention according to claim 1 of the present application is a large-sized printer using roll paper, wherein both ends of a long spindle to which the roll paper is attached are mounted. At least one of the pair of spindle receivers is rotatably formed, and one end of a spindle is mounted on the rotatable spindle receiver, and the one spindle receiver is used as a fulcrum. The other end of the spindle is mounted on the other spindle receiver by rotating.

According to the present invention, the rotatable spindle receiver is inclined obliquely to the front side, and one end of the spindle is placed in that state, and the one spindle receiver is rotated about the fulcrum to rotate the other spindle receiver. The other end of the spindle is placed on the receiver. Therefore, since the direction of the rotatable spindle receiver can be first rotated in the direction in which it can be easily mounted, and only one end of the spindle can be mounted first, there is no need to extend the arm forward as in the conventional case. Easy. After one end of the spindle is mounted, half of the total weight is supported by the spindle receiver, so that the weight load is reduced, and the other spindle is rotated by using the rotatable spindle receiver as a fulcrum. Since only the other end of the spindle is mounted on the receiver, the replacement operation is extremely simple.

According to a second aspect of the present invention, in the first aspect, the rotatable spindle receiver has a rotation limit to a front side of the printer of 20 degrees to 50 degrees.
It is characterized in that it is restricted to an angle of degrees. Thus, when the one end of the spindle is first placed from the front side of the printer, the work space can be set at an appropriate angle so that the depth of the working space does not vary much. Especially 30 to 40
A range of degrees is preferred.

[0008] The invention described in claim 3 is the first invention.
Or the pivotable spindle receiver has a biasing means for rotating the printer to the front side of the printer, and when the spindle is detached, the rotation is limited to a rotation limit by the biasing force of the biasing means. It is characterized in that it is located automatically. Thus, when the spindle is removed from the spindle receiver to replace the roll paper, the spindle receiver automatically turns to an appropriate angular position on the front side where it is easy to be placed. It is simple because there is no need to manually adjust the orientation of the spindle receiver when mounting.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the spindle receiver has two pairs, and the relative arrangement of the two pairs is rearward on the upper side. It is characterized by a diagonal up-down relationship. This makes it possible to switch to another roll immediately after using up one roll, and if you start using the upper roll, continue printing with the lower roll. It is possible to replace the roll paper on the upper side anew.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the spindle is provided with a stopper at one end, and is provided on the rotatable spindle receiver. A locking portion for locking the stopper is formed. Accordingly, when the one end of the spindle is placed on the spindle receiver, the stopper is locked by the locking portion, so that the spindle does not accidentally come off the spindle receiver during the roll paper replacement operation.

According to a sixth aspect of the present invention, in the first aspect of the invention, the stopper of the spindle is different from the other end side in terms of shape so that incorrect insertion of the right and left is prevented. It is characterized by having an identification function for prevention. As a result, in addition to the function of retaining the function, in addition to the function of retaining the function, it is possible to determine at a glance which side of the left and right ends of the spindle is to be placed on the spindle receiver at first glance. It can be reliably prevented.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a main part of a large printer according to an embodiment of the present invention in which roll paper is being replaced, and FIG. 2 is an enlarged plan view of a main part showing a pair of spindle receiving portions of the large printer. FIG. 3 is a plan view showing a state in which both ends of the spindle are mounted on the spindle receiver, and FIG. 4 is a plan view showing a state before one end of the spindle is mounted on the spindle receiver and starts rotating. FIG. 5 is a schematic front view of the large-sized printer, and FIG. 6 is a schematic vertical sectional view showing a state where an operator is performing a roll paper replacement operation.

As shown in the front view of FIG. 5, the large-sized printer according to the present embodiment has a pair of spindle receivers 1a, 1a.
Further, a pair of spindle receivers 2a and 2b are provided under the head b. The two long spindles 4 and 5 to which the roll papers 3 and 3 are respectively attached are the spindle receiver 1.
a, 1b and between 2a, 2b. That is, both ends 4a and 4b of the spindle 4 are mounted on the pair of spindle receivers 1a and 1b,
a and 5b are already mounted on a pair of spindle receivers 2a and 2b. In FIG. 5, reference numeral 6 denotes a frame of the printer main body to which the spindle receivers 1a, 1b and 2a, 2b and the like are attached, reference numeral 7 denotes a printing area including a print head (not shown), and reference numeral 8 denotes printed. 4 illustrates a discharge stack area for receiving sheets.

FIG. 6 shows a state in which the operator 9 is performing a roll paper exchange operation. In the two spindles 4 and 5, the upper spindle 4 is relatively rearward with respect to the operator 9. They are arranged diagonally up and down. Then, the roll paper 3 is arranged so as to be conveyed almost linearly obliquely up and down toward the entrance of the print area 7 and the discharge stack area 8.

Referring to FIG. 2, the structure of the spindle receivers 1a and 1b, which are main components of the large printer according to the present embodiment, will be described. The other spindle receivers 2a and 2b have the same structure as the spindle receivers 1a and 1b, and thus the description is omitted. One spindle receiver 1a is formed to be rotatable in a horizontal plane. In this embodiment, a rotating portion 11 is configured to be rotatable via a rotating fulcrum 12 on a base portion 10 fixed to the frame 6. Rotating part 11
Has a recess 13 in which one end 4a of the spindle 4 is placed, and a pair of rollers 14, 14 are symmetrically arranged on the bottom of the recess 13 with the rotation fulcrum 12 interposed therebetween, thereby reducing the rotational load of the spindle 4. It has become.

Further, in the present embodiment, the rotating portion 11
Is limited to an angle of rotation of 20 to 50 degrees in front of the printer. Preferably, the angle is defined in the range of 30 to 40 degrees. In this example, the rotation to the front side of the printer is about 3 degrees.
It is formed to stop at 5 degrees. In the present embodiment, the rotating portion 11 has a spring (not shown) so as to rotate toward the front side of the printer, and when the spindle 4 is removed from the spindle receiver 1a (the state shown in FIG. 2). ) Is automatically positioned at the angle of about 35 degrees, which is the rotation limit, by the biasing force of the spring.

Further, in the present embodiment, a locking portion 15 is provided on the back side of the concave portion 13. On the other hand, as shown in FIG. 3, the spindle 4 also has a stopper 16 at one end 4a. The stopper 16 is formed in a circular flange shape, and the shape of the locking portion 15 is formed so that the flange-shaped stopper 16 can be locked. It is needless to say that the stopper 15 and the locking portion 16 are not limited to the above-described shapes.

Next, the structure of the other spindle receiver 1b on which the other end 4b of the spindle 4 is mounted will be described with reference to FIG. The spindle receiver 1b is fixed to the frame 6 and has a recess 17 on which the other end 4b of the spindle 4 is placed. A pair of rollers 18 are provided at the bottom of the recess 17. The shape of the recess 17 is different from that of the other end 4 of the spindle 4.
It is formed in a simple shape that fits the cylinder corresponding to the cylinder shape of b.

In the present embodiment, the stopper 16 of the spindle 4 is different in shape from the simple columnar shape on the other end side, and is formed so that the difference in the shape is obvious. Therefore, the flange shape has an identification function for preventing the possibility that the spindle 4 is incorrectly set right and left. In FIG. 3, reference numeral 20 denotes a flange of the roll paper 3.

Next, the replacement operation when replacing the roll paper with new roll paper in the large printer according to the above embodiment will be described.
First, when the spindle 4 is removed from the pair of spindle receivers 1a and 1b, one of the spindle receivers 1a is automatically turned to the position shown in FIG. 2 and stopped by a spring (not shown). Then, as shown in FIG. 1, the worker 9 holds the long spindle 4 to which the new roll paper 3 is attached, and first places the right end 4a on the one spindle receiver 1a. FIG. 4 corresponds to an enlarged view of this state. When holding the spindle 4 to which the new roll paper 3 is attached, the operator 9 can hold the spindle 4 with the flange-shaped stopper 16 as a mark so as not to make a mistake in right and left.

Next, from the state shown in FIG.
The other end 4b of the spindle 4 is turned around the rotation support point a and is mounted on the other spindle receiver 1b. FIG. 3 corresponds to an enlarged view of this state.

As described above, according to the present embodiment, first, the direction of the rotatable spindle receiver 1a is rotated in a direction in which it can be easily mounted, and only one end 4a of the spindle 4 is mounted first. Therefore, there is no need to extend the arm forward as in the related art, so that the operation is simple. After the one end 4a of the spindle 4 is mounted, half of the total weight is supported by the spindle receiver 1a, so that the weight load is reduced, and the spindle receiver 1a is rotated about the rotatable spindle receiver 1a. Since the other end 4b of the spindle 4 is merely placed on the other spindle receiver 1b, the replacement operation is extremely simple.

The rotatable spindle receiver 1a is
The rotation limit to the front side of the printer is 20 to 50 degrees,
In the case where the angle is preferably restricted to 30 to 40 degrees, when the first end 4a of the spindle 4 is first placed from the front side of the printer, the operation can be performed at an appropriate angle so that the depth of the working space does not vary much. Further, when the spindle 4 is removed from the spindle receivers 1a and 1b in order to replace the roll paper 3, the spindle receiver 1a is automatically turned to a proper angle position on the front side by a spring (not shown) so that it can be easily placed on the front side. Is simple because there is no need to manually adjust the direction of the spindle receiver 1a when placing one end 4a of the spindle 4 to which a new roll paper 3 is attached.

Also, there are two pairs of spindle receivers.
In the case where the relative arrangement of the pairs is obliquely up and down with the upper side being the rear side, it is possible to immediately switch to another roll paper 3 even if one roll paper 3 is used up, and the roll paper of the upper spindle 4 If the user starts to use from the side of No. 3, it is possible to replace the upper roll paper while switching the roll paper of the lower spindle 5 while continuing printing.

When one end 4a of the spindle 4 is mounted on the spindle receiver 1a, the stopper 16 is locked by the locking portion 15. There is no risk of accidentally coming off the spindle receiver 1a. In addition, the retaining stopper 16 has a functional U retaining function and is capable of determining at a glance which of the left and right ends of the spindle 4 is to be placed on the spindle receiver 1a at first glance. In addition, erroneous left and right insertion can be reliably prevented.

[0026]

According to the present invention, a heavy and large roll paper and the spindle to which it is attached can be easily and lightly placed on the spindle receiver. That is, first, the rotatable spindle receiver can be rotated in the direction in which it can be easily mounted, and only one end of the spindle can be mounted first, so that the arm does not need to be extended forward as in the related art. Easy. After one end of the spindle is mounted, half of the total weight is supported by the spindle receiver, so that the weight load is reduced, and the other spindle is rotated by using the rotatable spindle receiver as a fulcrum. Since only the other end of the spindle is mounted on the receiver, the replacement operation is extremely simple.

Further, in the case where the stopper is locked by the locking portion when one end of the spindle is placed on the spindle receiver, the spindle is inadvertently removed from the spindle receiver during the roll paper changing operation. There is no risk of coming off. Furthermore, in addition to the function of retaining the function,
If the left and right ends of the spindle are placed on the spindle receiver first, it is possible to determine at a glance the shape of the spindle, so that erroneous insertion of the left and right can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a main part plan view of a large printer according to an embodiment of the present invention in a state where roll paper is being replaced.

FIG. 2 is a main part enlarged plan view showing a pair of spindle receiving portions of the large printer.

FIG. 3 is a plan view showing a state where both ends of a spindle are mounted on the spindle receiver.

FIG. 4 is a plan view of a state before one end of the spindle is mounted on the spindle receiver and starts rotating.

FIG. 5 is a schematic front view of the large printer.

FIG. 6 is a schematic vertical sectional view showing a state where an operator is performing a roll paper replacement operation.

[Explanation of symbols]

 1a, 2a Rotatable spindle receiver 1b, 2b Fixed spindle receiver. Reference Signs List 3 Roll paper 4, 5 spindle 4a, 5a One end of spindle 4b, 5b The other end of spindle 6 Frame 7 Print area 8 Discharge stack area 9 Worker 10 Base 11 Rotating part 12 Rotating fulcrum 13 Recess 14 Roller 15 Stop 16 Stopper 17 Recess

Claims (6)

[Claims] 1. A large-sized printer using roll paper, comprising at least a pair of spindle receivers on which both ends of a long spindle to which roll paper is attached are mounted.
At least one of the pair of spindle receivers is formed to be rotatable, one end of the spindle is placed on the rotatable spindle receiver, and the one spindle receiver is rotated about a fulcrum, and the other spindle receiver is rotated. A large-sized printer characterized in that the other end is placed. 2. The printer according to claim 1, wherein said rotatable spindle receiver has a rotation limit of 20 degrees to 5 degrees in front of the printer.
A large printer characterized by being restricted to an angle of 0 degrees. 3. The printer according to claim 1, wherein the rotatable spindle receiver has a biasing means for rotating the printer toward the front of the printer, and when the spindle is removed, the spindle is rotated by the biasing force of the biasing means. Large printer characterized by being automatically located at the limit. 4. A large-size printer according to claim 1, wherein said spindle receiver has at least two pairs, and said at least two pairs have an oblique vertical relationship in which the upper side is rearward. . 5. The spindle according to claim 1, wherein a stopper is provided at one end of the spindle, and a locking portion for locking the stopper is formed in the rotatable spindle receiver. A large printer characterized by the following. 6. A large-size printer according to claim 1, wherein the stopper of the spindle has an identification function for preventing erroneous right and left insertion, which is different in shape from the other end.