JPH0585749U - Printer - Google Patents

Abstract

(57) [Summary] [Structure] A pair of tractor mounting bases 33 and a shaft holding portion 34 are provided at the rear of the main frame 21 on both sides in a protruding manner.
A substantially prismatic drive shaft 36 is rotatably supported between the shaft holding portions 34. The tractor set 39 is housed inside the tractor block 37. A belt 42 having a sprocket pin 42a projecting from the shafts 40, 41 is wound around to form a tractor set 39. The drive shaft 36 is fitted into the square hole 40a of the shaft body 40, and the tractor block 37 is rotatably supported with the drive shaft 36 as a fulcrum.
To drive the sprocket pin 42a. [Effect] The length dimension L of the front and rear of the printer can be reduced to reduce the packing volume. It is possible to improve the positional accuracy of mounting the tractor set 36 and the accuracy of sheet transportation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printer including a tractor set that conveys continuous paper.

[0002]

[Prior Art]

 Conventionally, for example, a printer having a structure shown in FIG. 4 has been considered. In this printer, a cut sheet carry-in port 2 is provided in the lower front portion of the main body 1, and a paper carry-out port 3 is provided in the upper substantially central portion of the main body 1. The cut paper carry-in port 2 and the paper carry-in port 2 are provided. A first transport path 4 is formed between the outlet 3 and the outlet 3. A plurality of conveyance rollers 5 and a main roller 6 which are rotated in close contact with each other are provided along the upper and lower sides of the conveyance path 4, and the conveyance path 4 is provided in the vicinity of the sheet discharge port 3. A recording head 7 and a platen 8 which face each other are provided, and recording is performed on a conveyed sheet.

A pair of tractor sets 10 on both sides are integrally incorporated in the rear portion of the main body 1. By rotating a prismatic drive shaft (square shaft) 11, an endless belt 12 is formed. It is designed to rotate. The belt 12 is provided with a plurality of sprocket pins 14 protruding from each other at a predetermined interval, and the sprocket pins 14 are engaged with round holes provided on both sides of the continuous paper at a predetermined interval. The continuous paper is conveyed in this state. Further, a continuous paper carry-in port 15 is provided on the rear surface of the main body 1, and the first transport path 4 below the platen 8 extends from the continuous paper carry-in port 15 along the lower side of the peripheral surface of the main roller 6. A second transport path 16 is provided so as to communicate with each other, and the continuous paper transported by the tractor set 10 is transported between the head 7 and the platen 8.

Further, conventionally, for example, a printer having a structure shown in FIG. 5 has been considered. This printer is different from the printer shown in FIG. 4 in that the tractor block 17 having the tractor set 10 is provided separately from the main body 1, and the tractor block 17 is detachably attached to the interior 18 provided at the rear of the main body 1. To do.

[0005]

[Problems to be solved by the device]

 In the printer having the structure shown in FIG. 4, since the tractor set 10 projects rearward of the main body 1, the length A from the front end of the printer to the rear end of the tractor set 10 is large and the projected area is large. Since it becomes larger, the packing volume also becomes larger, and there is a problem that packing costs, transportation costs, or storage costs become expensive.

Further, in the printer having the structure shown in FIG. 5, the length of the main body 1 is reduced when the tractor block 17 is removed, but the tractor block 17 is located at the reference position of the guide portion 18 of the main body 1. The mounting work for mounting with high accuracy and the work for connecting the tractor set 10 to the drive shaft 11 are complicated, and depending on the mounting state of the tractor block 17, the accuracy of the paper conveyance is reduced and recording bias (skew) may occur. In addition to being prone to occur, the tractor block 17 that has been removed must be packaged and managed separately from the main body 1, resulting in high packaging costs and complicated inventory management.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printer that can reduce the projected area and increase the mounting accuracy of the tractor set.

[0008]

[Means for Solving the Problems]

 The printer of the present invention prints on the continuous paper by the recording head while sequentially conveying the continuous paper to the recording surface portion where the recording head is arranged through the paper inlet and the paper conveying path through the tractor block attached to the main body. In this printer, a tractor block that is rotatably installed with the drive shaft provided on the main body as a fulcrum on one end side and the other end side as a free end is attached, and the tractor block is mounted on the tractor block and It is equipped with a tractor set that is driven by a shaft and that conveys continuous paper.

[0009]

[Action]

 In the printer of the present invention, the tractor set is driven by rotating the drive shaft, and the continuous paper is conveyed by the tractor set. The tractor block equipped with the tractor set is rotated to a predetermined position with the drive shaft as a fulcrum.

[0010]

【Example】

 The configuration of an embodiment of the printer of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 20 denotes a main body of the printer, and the main body 20 is formed by connecting a pair of main frames 21 arranged side by side in a relative direction. A cut sheet carry-in port 22 is provided near the lower end of the front side of the main frame 21, which is the operator side, and a paper carry-out port 23 is provided at the upper substantially central portion. A first transport path 25 that curves upward is formed between the cut paper carry-in port 22 and the paper carry-out port 23.

A main roller 26 and a plurality of lower transfer rollers 27 are supported between the main frames 21 along the lower transfer surface of the first transfer path 25 so as to be rotatable in the forward and reverse directions. A platen 31 is mounted in the vicinity of the sheet carry-out port 23 so as to face the first transport path 25, and a pair of transport rollers 32a and 32b are provided on the platen 31. ..

Further, a pair of tractor mounting bases 33 on both sides are provided on the rear surface side of the main frame 21 so as to project upward and rearward, and a pair of shaft holding portions 34 on both sides are located above the tractor mounting base 33. It is projected.

As shown in FIG. 3, each of the shaft holding portions 34 is formed with a circular hole 34a, and a bearing body 35 is rotatably fitted in the circular hole 34a. Further, a square hole 35a is formed at the center of the bearing body 35, and a substantially prismatic drive shaft (square shaft) 36 is fitted and supported in the square hole 35a.

Further, in FIG. 1 to FIG. 3, reference numeral 37 is a tractor block, and the tractor block 37 is configured by accommodating a tractor set 39 inside a substantially box-shaped case body 38 having an open upper surface. In this tractor set 39, an endless belt 42 is wound around shafts 40 and 41 that are rotatably provided in the vicinity of both ends of the tractor set 39. A plurality of sprocket pins 42a are projected. Further, on the upper part of the case body 38, there is attached a substantially plate-like paper presser 43 having a long hole 43a formed along the upper side of the belt 42, and the paper presser 43 is a lock lever. By the operation of 44, it is held in parallel with the upper side of the belt 42.

The tractor block 37 is rotated about the drive shaft 36 by fitting each end of the drive shaft 36 into a square hole 40a formed at the center of one shaft body 40. While being supported so as to be possible, as shown in FIG. 2, it is fixed at a predetermined position by a locking mechanism (not shown) with the bottom surface portion 38a of the case body 38 in contact with the tractor mounting base 33. Then, with the tractor block 37 fixed in this manner, the drive shaft 36 connected to the drive shaft of the motor (not shown) via the transmission mechanism rotationally drives the sprocket pin 42a of the tractor set 39 to rotationally drive. I'm supposed to get it. An arcuate bulging portion 38b is formed on the bottom surface portion 38a of the case body 38, and when the tractor block 37 is in contact with the upper surface of the tractor mounting base 33, the bulging portion 38b of the tractor mounting base 33 is formed. It is housed in the recess and positioned.

Further, on the rear surface of the main body 20, there is provided a continuous paper carry-in port 45 as a paper carry-in port at a height position along the upper surface portion 38c of the case body 38 of the tractor block 37, and the continuous paper carry-in port 45 is provided. A second transport path 46 is provided as a paper transport path in a state of communicating with the first transport path 25 below the platen 31 along the lower side of the peripheral surface of the main roller 26 from the paper carry-in port 45. A paper pan 47 and a continuous paper transport roller 48 are provided along the lower surface of the second transport path 46.

Further, 54 is a carrier block, and this carrier block 54 is constituted by connecting a pair of carrier frames 55 on both sides. Further, on the rear surface side of the carrier block 54, there is provided a curved upper transport surface facing the lower transport surface of the main frame 21 with a gap, and along the upper transport surface. A plurality of upper transfer rollers 57 that rotate in close contact with the main roller 26 and the lower transfer roller 27 of the main frame 21 are supported.

A carrier (not shown) is provided above the carrier block 54, and the recording head 61 and the ribbon cassette 63 are mounted on the carrier so as to be movable in the width direction of the paper. The recording surface portion 64 is adapted to face the platen 31 attached to the main frame 21 with a slight gap.

A bearing portion 66, which is cut out in a substantially U-shape, is provided at the lower end of the front side of the carrier frame 55, and the bearing portion 66 is provided on the lower front side of the main frame 21 for rotation. By fitting on the shaft 67, the carrier block 54 is rotatably attached to the front side with respect to the main frame 21, and expands the conveyance path 25 when a paper jam occurs in the conveyance path 25. Is ready for you.

Next, the operation of the printer of this embodiment will be described.

First, when recording is performed using a cut sheet, the cut sheet is inserted from the cut sheet carry-in port 22 on the front side to the first transport path 25. Then, the cut paper is carried by rotating the upper and lower carrying rollers 27, 57 and the main roller 26, and the cut paper is carried in the gap portion 65 between the platen 31 and the recording head 61. Recording is performed by the recording surface section 64 of the head 61. The cut sheet thus recorded is conveyed by the conveying rollers 32a and 32b above the recording head 61, and is ejected from the sheet outlet 23 in a substantially vertical shape.

Then, when recording is performed using continuous paper, as shown in FIG. 2, with the tractor lock 37 abutting and fixed to the tractor mount 33, the lock lever 44 is rotated to operate the paper. Release the presser foot 43, engage the sprocket pin 42a with round holes formed at predetermined intervals on both sides of the continuous paper in the longitudinal direction, and further rotate the lock lever 44 to rotate the paper presser foot 43 Is held parallel to the upper side of the belt 42, and the continuous paper is mounted on the upper surface 38c of the case body 38 of the tractor block 37.

In this state, the drive shaft 36 is rotationally driven to rotationally drive the belt 42 and the sprocket pin 42a via the shaft 40, and the continuous paper is fed from the continuous paper carry-in port 45 to the second transport path. Supply to 46. The continuous paper is carried by the main roller 26 and the continuous paper carrying roller 48 while being guided by the paper pan 47, and is carried to the gap portion 65 of the first carrying path 25. Then, similarly to the case of using the cut paper, the print is performed by the recording surface portion 64 of the recording head 61 and is ejected from the paper carry-out port 23.

When the printer is transported, the locking mechanism (not shown) is released and the tractor block 37 is rotated substantially vertically about the drive shaft 36 as shown in FIG. , Install cushioning materials, etc. and pack.

According to the printer of the present embodiment, by rotating the drive shaft 36, the sprocket pin 42a of the tractor set 39 can be rotationally driven to convey continuous paper, and the tractor set 39 can be mounted. By rotating the block 37 substantially vertically with the drive shaft 36 as a fulcrum, the length dimension L in the front and rear of the printer can be reduced to reduce the projected area. Therefore, the packing volume can be reduced, and the packing cost, transportation cost, or storage cost of the printer can be reduced.

Further, since the tractor block 37 is rotated about the drive shaft 36 as a fulcrum, it is not necessary to attach and detach the tractor block 37 to and from the drive shaft 36, and the drive shaft 36 is the reference position for mounting the tractor set 39. As a result, it is possible to improve the positional accuracy of the mounting of the tractor set 36 and the accuracy of the sheet conveyance, and it is possible to suppress the occurrence of uneven recording.

Further, since it is not necessary to remove the tractor block 37 from the drive shaft 36, it is not necessary to separately package and manage the tractor block 37 during transportation, which can reduce the packing cost and facilitate inventory management. can do.

Further, in the printer of the present embodiment, the cut paper or the like is ejected from the paper carry-out port 23 in a substantially vertical shape, so that the operator can easily visually check the recording state of the paper.

[0030]

[Effect of the device]

 According to the printer of the present invention, by rotating the tractor block having the tractor set to the predetermined position with the drive shaft as the fulcrum, the length of the printer is reduced, the projected area is reduced, and the packing volume is reduced. As a result, the packaging cost, transportation cost, or storage cost can be reduced, and the drive shaft serves as the reference position for mounting the tractor set, which improves the positional accuracy of the tractor set mounting and improves the accuracy of paper transport. Therefore, the quality of recording can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a tractor block of a printer according to an embodiment of the present invention is rotated.

FIG. 2 is a cross-sectional view showing a usage state of the printer.

FIG. 3 is an exploded perspective view showing the same tractor block.

FIG. 4 is a cross-sectional view showing a conventional printer.

FIG. 5 is a sectional view showing a conventional printer.

[Explanation of symbols]

 20 Main body 36 Drive shaft 37 Tractor block 39 Tractor set 45 Continuous paper carry-in port as a paper carry-in port 46 Second transport path as a paper transport path 61 Recording head 64 Recording surface section

Claims (1)

[Scope of utility model registration request] 1. A printer in which continuous paper is sequentially conveyed to a recording surface portion in which a recording head is arranged through a paper inlet and a paper conveyance path through a tractor block attached to a main body, and the recording head prints out on the continuous paper. A tractor block that is rotatably provided with the drive shaft provided on the main body as a fulcrum on one end side and the other end side as a free end is mounted on the tractor block and driven by the drive shaft. A printer comprising a tractor set that conveys continuous paper.