JP4583971B2 - Recording apparatus and method for assembling recording apparatus - Google Patents

Description

  The present invention relates to a recording apparatus including an exterior and a recording mechanism unit accommodated in the exterior, and an assembling method of the recording apparatus.

In general, a printer includes a mechanical part including a recording head, and an exterior housing the mechanical part. The joint part between the exterior and the machine part needs to have a strength capable of withstanding the weight of the machine part and the stress caused by the shaking of the machine part during the recording operation. Therefore, screwing has been frequently used as a simple and low-cost method having the required strength (see, for example, Patent Document 1).
JP 2001-113784 A

By the way, most of the exteriors are formed by molding a thin metal plate or resin and are likely to bend. For this reason, when the exterior and the machine part are screwed in the assembly process of the printer, the mechanical part may be distorted due to the bending of the exterior. For this reason, the accuracy of the mechanical part is lowered, and there is a possibility that the recording operation is adversely affected.
Therefore, conventionally, the order of tightening the screws at the time of assembling has been determined in consideration of the load applied to each of the plurality of screwing points for joining the machine part and the exterior. However, in this method, the screws must be tightened according to the order determined in the assembly process, and there is a problem in that work efficiency decreases. Further, even if the screws are tightened in accordance with the determined order, the distortion of the mechanical part could not be completely prevented. Furthermore, in consideration of maintainability, it is necessary to ensure a work space for removing screws after manufacturing, and there is a problem that design restrictions increase.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to make it possible to easily assemble a printer configured by housing a mechanical part in an exterior without causing distortion.

  In order to solve the above-described problems, the present invention provides a recording apparatus in which a recording mechanism unit including a recording head is housed in an exterior made up of an upper case and a lower case, and the recording mechanism unit is contacted with the upper case. A plurality of elastic bodies in contact with each other; a plurality of elastic support members that contact the lower case to support the load of the recording mechanism unit; and a connecting means for connecting the upper case and the lower case; The upper case and the lower case are connected by the connecting means in a state where the recording mechanism is sandwiched and pressed via the elastic body and the elastic support member.

  According to the present invention, in the recording apparatus in which the recording mechanism unit including the recording head is accommodated in the exterior including the upper case and the lower case, the upper case and the lower case include a plurality of elastic bodies included in the recording mechanism unit. In addition, the recording mechanism unit is pressed against the pressing force applied from the upper case and the lower case, and is elastic against the pressing force. A repulsive force that repels the body and the elastic support member works. For this reason, since it is firmly fixed to the exterior made up of the upper case and the lower case via the elastic body and the elastic support member without screwing the recording mechanism, it can be easily performed without causing distortion. An assembling recording apparatus can be realized.

  In the present invention, the recording mechanism section includes a pair of side frames that constitute both ends in the longitudinal direction, and each of the side frames includes a roller positioned on one end side of the side frame, and other side frames. A ring member facing the lower case on the end side, and the elastic support member provided in the recording mechanism section is the roller and the ring member, and the lower case receives the roller In the receiving portion, a position restricting member that restricts the position of the roller and a protrusion inserted into the ring member may be provided.

  In this case, a roller and a ring member are provided as elastic support members on the side frame provided in the recording mechanism unit, and this roller is received by a receiving unit provided in the lower case, and the position is regulated by the position regulating member. Further, since the protrusion is inserted into the ring member, the recording mechanism unit is held at a correct position with respect to the lower case by the rollers and the ring members provided at both ends in the longitudinal direction of the recording mechanism unit. For this reason, in assembling the recording apparatus, when the recording mechanism portion is placed on the lower case, the roller is first placed on the receiving portion, and then the recording mechanism portion is rotated around the roller so that the ring member If the roller is gradually lowered from above, the position of the roller is regulated, so that the protrusion is naturally inserted into the ring member. As a result, the assembling work becomes easier and the effect of being able to be assembled with high accuracy is obtained.

  Further, in the present invention, the connecting means includes a claw protruding downward at a lower end of the upper case, a receiving groove formed in the upper part of the lower case so that the claw of the upper case can be fitted, and the upper case. It is good also as a structure provided with the bracket arrange | positioned ranging over the said lower case, and screwed with respect to each of the said upper case and the said lower case.

  In this case, the upper case includes a claw projecting downward at the lower end of the upper case, a receiving groove formed so that the upper case claw can be fitted therein, and a bracket disposed across the upper case and the lower case. The lower case can be easily connected.

  A method for assembling a recording apparatus according to the present invention is an assembling method for a recording apparatus in which a recording mechanism unit including a recording head is housed in an exterior made up of an upper case and a lower case, A plurality of elastic bodies that contact the upper case, a plurality of elastic support members that contact the lower case and support the load of the recording mechanism, and a connection that connects the upper case and the lower case A first step of placing the recording mechanism portion on the lower case; and covering the recording mechanism portion with the upper case. The upper case and the lower case are used to make the recording mechanism portion elastic. A second step of sandwiching the body through the body and the elastic support member, and the upper case and the lower case by the connecting means in a state in which the upper case is pressed toward the lower case. Through a third step of connecting, the characterized in that assembling the recording apparatus.

  According to the present invention, in the first step, the recording mechanism portion is placed on the lower case, and in the second step, the recording mechanism portion is covered with the upper case, and the recording mechanism portion is sandwiched between the upper case and the lower case. In this case, the upper case and the lower case are connected in a state where the upper case is pressed toward the lower case. Therefore, the recording mechanism section is applied with the pressing force applied from the upper case, and the elastic body and the elastic support member repel the pressing force. Due to the repulsive force, the upper case and the lower case are strongly fixed. Thus, the recording mechanism can be securely fixed without directly screwing the recording mechanism, and a recording apparatus that can be easily assembled without causing distortion can be realized.

  In the present invention, the recording mechanism section includes a pair of side frames that constitute both longitudinal ends thereof, and each of the side frames includes a roller positioned on one end side of the side frame and the side frame. A ring member facing the lower case is disposed on the other end side, and the elastic support member provided in the recording mechanism is the roller and the ring member, and the lower case receives the roller A receiving portion, a position restricting member for restricting the position of the roller in the receiving portion, and a protrusion to be inserted into the ring member are provided. In the first step, the roller included in the recording mechanism portion is first disposed in the lower portion. Fit into the receiving part of the case, and then rotate the recording mechanism part along the surface of the side frame around the roller, It may be inserting the projection into the ring member.

  In this case, in the first step, first, the roller disposed on the side frame is fitted into the receiving portion of the lower case, and then the recording mechanism is rotated along the surface of the side frame around the roller. Since the protrusion is inserted into the ring member, the position of the roller is regulated first, and the recording mechanism is rotated around the roller, so that the recording mechanism is held at the correct position with respect to the lower case. For this reason, the recording apparatus can be assembled more easily and with high accuracy.

  According to the present invention, since the recording mechanism can be securely fixed to the exterior without screwing the exterior and the recording mechanism housed in the exterior, the recording apparatus is distorted. It can be assembled easily without any problems.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are external perspective views of a dot impact printer 10 according to an embodiment of the present invention. In particular, FIG. 1 is a perspective view of the dot impact printer 10 as viewed from above, and FIG. FIG. 3 is a perspective view showing the configuration of the recording mechanism unit 20 built in the dot impact printer 10, and FIG. 4 is a cross-sectional view of the dot impact printer 10 taken along the line AA 'in FIG.

  The dot impact printer 10 as a recording apparatus of the present invention uses a recording head 30 that ejects a plurality of recording wires (not shown) to eject characters onto a recording surface of a recording medium via an ink ribbon. The image including it is recorded. Here, as the recording medium, various forms of sheets (including paper and resin) such as cut paper, continuous paper, and copy paper can be used. In this embodiment, the recording medium is continuous. An example using paper will be described.

As shown in FIG. 1, the dot impact printer 10 has a substantially box-shaped exterior made up of an upper case 11 and a lower case 12, and a recording mechanism section 20 (FIG. 3) is built in the exterior.
An upper surface cover 13 is disposed on the front surface of the upper case 11 and is opened upward when a ribbon cartridge 50 (FIG. 6) described later is mounted on the recording mechanism unit 20. A front paper feed port 101 for supplying continuous paper to the recording mechanism unit 20 is opened at the lower front surface of the upper case 11. A front cover 15 that opens forward is disposed on the front paper feed port 101, and the front cover 15 can be opened so that continuous paper can be set in the recording mechanism unit 20.
As shown in FIGS. 1 and 2, the upper case 11 is provided with an upper back cover 14 that is continuous from the rear upper surface of the upper case 11 to the rear surface. The upper back cover 14 is connected to the lower case 12 by a hinge portion 17 and is opened rearward during maintenance of a recording mechanism portion 20 described later. A paper discharge port 103 through which the continuous paper after recording is discharged is opened on the back surface of the upper back cover 14. On the back surface of the upper case 11, below the upper back cover 14, a rear paper feed port 102 for supplying continuous paper to the recording mechanism unit 20 is opened.
Further, an I / F cover 16 is disposed at the lower back of the lower case 12. A connector (not shown) for connecting the dot impact printer 10 to various devices such as a computer is disposed inside the I / F cover 16. The I / F cover 16 is opened and a cable is connected to the connector. Can be connected.
On the bottom surface of the lower case 12, two front leg rubbers 104 are disposed on the front side, and two rear leg portions 105 are disposed on the rear side. The front leg rubber 104 and the rear leg 105 abut on the installation surface on which the dot impact printer 10 is installed.
An operation panel 106 is disposed on the upper front surface of the upper case 11. The operation panel 106 includes switches for performing various settings relating to the operation of the dot impact printer 10, an indicator for notifying the operation state, a liquid crystal display panel, and the like. A switch 107 for turning on / off the power source of the dot impact printer 10 is disposed at the corner of the front surface of the lower case 12. As shown in FIG. 2, a power connector 108 for supplying power to the dot impact printer 10 is disposed on the back surface of the lower case 12.

  Next, the configuration of the recording mechanism unit 20 will be described. As shown in FIGS. 3 and 4, the recording mechanism unit 20 includes a right side frame 21, a left side frame 22, a front frame 23, and a base frame 24 as main body frames. The main body frame is provided with a recording head 30, a carriage 28 for mounting the recording head 30, a front paper feed mechanism 26 that supplies continuous paper to the recording head 30 from the front side, and a recording paper 30 from the rear side. A rear paper feeding mechanism 27 that supplies continuous paper, a transport mechanism 34 that conveys the continuous paper supplied by the front paper feeding mechanism 26 and the rear paper feeding mechanism 27 toward the recording head 30, and recording by the recording head 30. A paper discharge mechanism 35 for discharging the continuous paper and a ribbon drive unit 37 for driving a ribbon cartridge (not shown) are provided.

The right side frame 21 and the left side frame 22 are erected so as to face each other at both ends of the recording mechanism unit 20, and the front frame 23 and the base frame 24 are interposed between the right side frame 21 and the left side frame 22. It is bridged. The front frame 23 is located on the front side of the recording mechanism unit 20, and the base frame 24 is located on the rear side below the recording mechanism unit 20.
The front paper feed mechanism 26 includes a front paper feed table 261 disposed in the lower front portion of the recording mechanism unit 20, a tractor support shaft 263, which extends in parallel between the right side frame 21 and the left side frame 22, and A tractor drive shaft 264, a pair of left and right front tractors 262, and a front tractor cover 266 attached integrally to each front tractor 262 are provided. The front paper feed tray 261 has a surface extending obliquely upward from substantially the lower end portion of the front surface of the recording mechanism unit 20, and this surface supports continuous paper inserted from the front paper feed port 101 (FIG. 1) from below. To do. A tractor support shaft 263 and a tractor drive shaft 264 are disposed above the front sheet feed table 261, and a pair of left and right front tractors 262 are inserted through the tractor support shaft 263 and the tractor drive shaft 264. Each of the front tractors 262 has a flat surface portion, and the flat surface portion is arranged so as to be continuous with the surface of the front paper feed table 261. The front tractor 262 includes a tractor belt (not shown) having a plurality of pins 265. The tractor belt is hung on the tractor support shaft 263 and the tractor drive shaft 264. The tractor support shaft 263 is rotatably arranged, while the tractor drive shaft 264 is driven to rotate by a transport motor (not shown). The tractor belt rotates with the rotation of the tractor drive shaft 264 and moves the pin 265 along the plane of the front tractor 262. The pin 265 is exposed from the flat surface portion of the front tractor 262, and engages with sprocket holes formed at both ends of the continuous paper. When the tractor belt rotates and the pin 265 moves, the continuous paper is conveyed to the recording head 30 side. The front tractor 262 is provided with a front tractor cover 266 that covers the pin 265 from above. By placing the continuous paper on the front tractor 262 and covering the front tractor cover 266, the state where the pin 265 is engaged with the sprocket hole of the continuous paper is maintained.

The rear paper feed mechanism 27 includes a tractor support shaft 272 and a tractor drive shaft 273 that are spanned in parallel between the right side frame 21 and the left side frame 22, a pair of left and right rear tractors 271, and each rear tractor 271. A rear tractor cover 275 attached integrally and a sprocket wheel 276 disposed behind the rear tractor 271 are provided.
On the rear side of the recording mechanism unit 20, a part of the base frame 24 is formed in a plane at a position corresponding to the rear sheet feed port 102 (FIG. 2), and is inserted from the rear sheet feed port 102 by this plane. The continuous paper is supported from below. A tractor support shaft 272 and a tractor drive shaft 273 are arranged side by side on the base frame 24, and two rear tractors 271 are inserted through the tractor support shaft 272 and the tractor drive shaft 273. The rear tractor 271 has a flat portion, and the flat portion is disposed so as to be continuous with the flat surface formed by the base frame 24. The rear tractor 271 includes a tractor belt (not shown) having a plurality of pins 274, and this tractor belt is spanned between a tractor support shaft 272 and a tractor drive shaft 273. The drive shaft 273 is rotated by being driven. The pin 274 is exposed on the flat surface portion of the rear tractor 271 and engages with a sprocket hole formed in the continuous paper. Then, the pin 274 is moved by the rotation of the tractor belt, and the continuous paper is conveyed to the front side.
A sprocket wheel 276 is disposed behind the rear tractor 271. The sprocket wheel 276 is a pair of left and right ring-shaped members inserted through a shaft spanned between the right side frame 21 and the left side frame 22, and the shaft is driven by a transport motor (not shown). Rotate. A plurality of pins 277 are arranged on the circumferential surface of the sprocket wheel 276, and these pins 277 are engaged with the sprocket holes of the continuous paper conveyed from the rear tractor 271 from above. Then, the continuous paper is wound up by the rotation of the sprocket wheel 276 and conveyed toward the recording head 30. The rear tractor 271 is provided with a rear tractor cover 275 that covers the pin 277 from above. By placing the continuous paper on the rear tractor 271 and covering the rear tractor cover 275, the state in which the pins 274 are engaged with the sprocket holes of the continuous paper is maintained.

The transport mechanism 34 includes a first transport roller 341 that contacts the back surface of the continuous paper, a second transport roller 342 that faces the first transport roller 341 via the continuous paper, and a second transport that pivotally supports the second transport roller 342. A conveyance roller shaft 343 and a platen 31 disposed to face the recording head 30 are provided.
The first conveying roller 341 is disposed above the sprocket wheel 276 and abuts against the back surface of the continuous paper. A second transport roller shaft 343 is disposed at a position facing the first transport roller 341 across the continuous sheet. The second transport roller shaft 343 is rotatably spanned between the right side frame 21 and the left side frame 22, and a plurality of second transport rollers 342 are inserted therethrough. The second conveyance roller shaft 343 can move within a predetermined range by the operation of a roller opening / closing motor (not shown), and the second conveyance roller 342 is separated from the first conveyance roller 341 by the operation of the roller opening / closing motor. Alternatively, it is biased toward the first conveying roller 341 side.
The second transport roller 342 is urged toward the first transport roller 341 so that the continuous paper is sandwiched and supported between the first transport roller 341 and the second transport roller 342. The first transport roller 341 is driven by a transport motor (not shown) and the drive wheel train 33, and the continuous paper is transported to the recording head 30 side by the rotation of the first transport roller 341.

  The carriage 28 is inserted through a carriage shaft 29 spanned between the right side frame 21 and the left side frame 22. A belt is mounted on the carriage 28 between a carriage drive motor 32 and a carriage drive pulley (not shown). The belt is driven by the carriage drive motor 32 and the carriage drive pulley, and thus along the carriage shaft 29. Moving. A recording head 30 is mounted on the carriage 28. The recording head 30 faces the recording surface of the continuous paper above the transport mechanism 34, and an ink ribbon (not shown) is disposed between the recording surface of the continuous paper and the recording head 30. By ejecting a recording wire (not shown) from the recording head 30 toward the continuous paper, ink adheres to the recording surface of the continuous paper, and an image including characters is recorded. At a position facing the recording head 30, a platen 31 is disposed on the back side of the continuous paper. The platen 31 is a flat platen having a plane in contact with the continuous paper, and supports the protruding output of the recording wire in this plane. The platen 31 is configured to be movable in a direction perpendicular to the continuous paper, and is urged toward the continuous paper by a spring (not shown).

The paper discharge mechanism 35 includes a first paper discharge roller 351 that contacts the continuous paper recorded by the recording head 30 from the back side, a movable frame 353 disposed from the right side frame 21 to the left side frame 22, and a movable frame 353. , A movable shaft 354 and a unit support shaft 355, a spring 356 assembled across the movable frame 353 and the left side frame 22, a plurality of paper discharge roller units 357 fixed to the movable frame 353, and a paper discharge roller And a second paper discharge roller 358 assembled in the unit 357.
The first paper discharge roller 351 is in contact with the back surface of the continuous paper above the recording head 30 and is driven to rotate by a conveyance motor (not shown) and the drive wheel train 33. A movable shaft 354 and a unit support shaft 355 are disposed at a position facing the first paper discharge roller 351 via the continuous paper. The movable shaft 354 and the unit support shaft 355 are spanned between the right side frame 21 and the left side frame 22, and the unit support shaft 355 is fixed to the right side frame 21 and the left side frame 22, while the movable shaft 354. Is movable so as to draw a circle around the unit support shaft 355. The movable frame 353 is fixed to the movable shaft 354 and the unit support shaft 355 and is movable together with the movable shaft 354.
A plurality of paper discharge roller units 357 arranged in the axial direction of the movable shaft 354 and the unit support shaft 355 are attached to the movable frame 353. A second paper discharge roller 358 is assembled to each of the paper discharge roller units 357 at positions separated from the unit support shaft 355. The movable frame 353 is urged in a direction approaching the first paper discharge roller 351 about the unit support shaft 355 by a spring 356 spanned between the left side frame 22. Therefore, the second paper discharge roller 358 included in the paper discharge roller unit 357 is urged in a direction in which the second paper discharge roller 358 is pressed against the first paper discharge roller 351, and the continuous paper is fed to the first paper discharge roller 351 and the second paper by this urging force. It is sandwiched between the paper discharge rollers 358. Further, the movable shaft 354 is moved against the urging force of the spring 356 by the operation of a roller opening / closing motor (not shown). That is, when the roller opening / closing motor operates, the movable shaft 354 moves against the urging force of the spring 356, the second sheet discharge roller 358 is separated from the first sheet discharge roller 351, and when the roller opening / closing motor is not operated, The second paper discharge roller 358 is pressed against the first paper discharge roller 351 by the biasing force of the spring 356.

  A ribbon drive unit 37 is disposed at the front right end of the recording mechanism unit 20. The ribbon drive unit 37 is fixed to the right side frame 21 and drives a winding mechanism provided in a ribbon cartridge (not shown) to perform a winding operation of the ink ribbon (not shown). By this winding operation, a new ink ribbon is always supplied between the recording head 30 and the continuous paper.

FIG. 5 is a plan view showing the configuration of the upper case 11 on the bottom side, that is, the recording mechanism unit 20 side, and FIG. 6 is a plan view showing the configuration of the upper case 11 on the recording mechanism unit 20 side. . 7 and 8 show a state in which the recording mechanism 20 is placed on the lower case 12 and tilted, FIG. 7 is a perspective view, and FIG. 8 is a rear view.
Here, with reference to FIGS. 1 to 4 and FIGS. 5 to 8, the mounting structure between the upper case 11 and the lower case 12 that are the exterior of the dot impact printer 10 and the recording mechanism unit 20 will be described in detail. Explained.

  As shown in FIG. 3, a right front damper 211 is disposed on the front side and a right rear damper 212 is disposed on the rear side at the upper end of the right side frame 21. In the left side frame 22 as well, a left front damper 221 is disposed at the upper end on the front side, and a left rear damper 222 is disposed at the upper end on the rear side. Each of these dampers corresponding to the elastic body of the present invention is made of a material having a predetermined elasticity such as rubber (including natural rubber and synthetic rubber) or synthetic resin such as silicone rubber. The four dampers disposed at the upper four corners of the recording mechanism unit 20 are in contact with the bottom surface of the upper case 11. In addition, when the surface of each of the dampers has a friction coefficient equal to or greater than a predetermined value, the recording mechanism unit 20 and the upper case 11 are more strongly fixed by friction with the upper case 11, which is preferable.

  As shown in FIG. 5, four damper receivers 111, 112, 113, 114 are formed in the upper case 11. On the bottom surface of the upper case 11, a large number of wall bodies are provided to give the upper case 11 the necessary strength, and the damper receivers 111, 112, 113, 114 have some of these wall bodies more than other parts. Is also formed to be a recess. As shown in FIG. 4, the damper receiver 111 is fitted to the right front damper 211 of the recording mechanism unit 20, and the damper receiver 112 is fitted to the right rear damper 212. Similarly, the damper receiver 113 (FIG. 5) is fitted to the left front damper 221, and the damper receiver 114 (FIG. 5) is fitted to the left rear damper 222.

On the other hand, as shown in FIG. 3, a pair of left and right rollers 25 projecting to the front side are disposed below the recording mechanism unit 20. The roller 25 includes a ring made of a material having a predetermined elasticity such as rubber (including natural rubber and synthetic rubber) or a synthetic resin such as silicone rubber, and a shaft that rotatably supports the ring. The shaft of the right roller 25 is fixed to the right side frame 21, the shaft of the left roller 25 is fixed to the left side frame 22, and the wheels can rotate along the surfaces of the right side frame 21 and the left side frame 22, respectively. It is.
Further, as shown in FIG. 6, roller receivers 121 and 122 as receiving portions of the present invention are formed at the corners on the front side of the lower case 12. These roller receivers 121 and 122 are recessed portions that fit into the roller 25, and the right roller restricting member 123 and the left roller restricting member 124 as the position restricting members of the present invention are disposed on the sides thereof.
The two rollers 25 included in the recording mechanism unit 20 are fitted in the roller receivers 121 and 122, respectively. In this state, the right roller restricting member 123 comes into contact with the side surface of the right roller 25 from the left side, and the left roller restricting member 124 comes into contact with the side surface of the left roller 25 from the right side. Accordingly, the position of the roller 25 in the longitudinal direction of the recording mechanism 20, that is, the axial direction of the carriage shaft 29 is restricted by the right roller restriction member 123 and the left roller restriction member 124.

Further, as shown in FIG. 7, a pair of left and right rubber legs 213 and 223 as ring members of the present invention are disposed at the lower part on the rear side of the recording mechanism section 20. The rubber legs 213 and 223 are members formed by molding a material having a predetermined elasticity such as rubber (including natural rubber and synthetic rubber) or synthetic resin such as silicone rubber into a ring shape having a hole in the center. The rubber leg 213 is fixed to the rear side lower part of the right side frame 21, and the rubber leg 223 is fixed to the rear side lower part of the left side frame 22.
In addition, a space is formed at a position corresponding to the hole of the rubber leg 213 at the joint portion between the rubber leg 213 and the right side frame 21, and a rod body having a predetermined length or less is inserted into the hole of the rubber leg 213. It can be inserted. Similarly, a space is formed in the rubber leg 223 at a position corresponding to the hole of the rubber leg 223 at the joint with the left side frame 22.
On the other hand, as shown in FIG. 6, a pair of left and right support protrusions 125 and 126 are formed on the rear side of the lower case 12 as the protrusions of the present invention. The support protrusions 125 and 126 are columnar protrusions that protrude upward at the rear part of the lower case 12, and their tips are rounded.
In the state where the recording mechanism unit 20 is joined to the lower case 12, the support protrusion 125 of the lower case 12 is inserted into the hole of the rubber leg 213 of the recording mechanism unit 20 as shown in FIG. 4. Here, the outer diameter of the support protrusion 125 is substantially the same as or slightly larger than the diameter of the hole of the rubber leg 213, and the support protrusion 125 is in a state where the support protrusion 125 is fitted in the hole of the rubber leg 213. And the rubber legs 213 are in close contact with each other so that play and play are not generated. Similarly, the support protrusion 126 of the lower case 12 is inserted into the hole of the rubber leg 223 of the recording mechanism unit 20. The outer diameter of the support protrusion 126 is substantially the same as the diameter of the hole of the rubber leg 223. When the support protrusion 126 is fitted in the hole of the rubber leg 223, the support protrusion 126 and the rubber leg 223 are in close contact with each other. There is no play or play.
As described above, the support protrusions 125 and 126 are fitted into the holes of the rubber legs 213 and 223, respectively, thereby restricting the position of the recording mechanism unit 20 in the horizontal direction.

As described above, the recording mechanism unit 20 is joined to the upper case 11 via the dampers of the right front damper 211, the right rear damper 212, the left front damper 221 and the left rear damper 222, and further includes two rollers 25, rubber legs. It is joined to the lower case 12 via 213 and 223. Since the dampers of the right front damper 211, the right rear damper 212, the left front damper 221 and the left rear damper 222 are respectively fitted into the damper receivers 111, 112, 113, 114 formed on the bottom surface of the upper case 11, recording is performed. The horizontal position of the mechanism unit 20 with respect to the upper case 11 is restricted.
Further, the two rollers 25 included in the recording mechanism unit 20 are respectively fitted to roller receivers 121 and 122 formed in the lower case 12, and the right roller restricting member 123 and the left roller are laterally connected to these rollers 25. The regulating member 124 contacts. Thereby, the position of the roller 25 in the left-right direction is restricted. Further, the support protrusions 125 and 126 formed on the lower case 12 are fitted into the rubber legs 213 and 223 included in the recording mechanism unit 20, respectively. Thereby, the horizontal position of the recording mechanism unit 20 is restricted.

Here, a connection structure between the upper case 11 and the lower case 12 will be described. As shown in FIG. 2, a bracket 18 straddling the upper case 11 and the lower case 12 is disposed on the back side of the dot impact printer 10. The bracket 18 is disposed inside the upper case 11 and the lower case 12, and is screwed to the bottom surface of the lower case 12 and the back surface of the upper case 11. The screw on the bottom surface of the lower case 12 is concealed by the lower case 12. On the other hand, the screw on the back surface of the upper case 11 is exposed and can be easily attached and detached.
As shown in FIG. 3, a receiving groove 120 is formed in the upper part of the front side of the lower case 12. A claw 110 (FIG. 5) is formed on the front side of the upper case 11 at a position corresponding to the receiving groove 120. The nail | claw 110 and the receiving groove 120 become a shape which controls so that the upper case 11 and the lower case 12 may not be separated, but the upper case 11 and the lower case 12 are faced | matched and the upper case 11 faces the lower case 12 By pressing, the claw 110 is fitted into the receiving groove 120.
Therefore, when connecting the upper case 11 and the lower case 12, the upper case 11 and the lower case 12 are brought into contact with each other to press the upper case 11, and the claw 110 is fitted into the receiving groove 120. The upper case 11 and the bracket 18 may be fixed by tightening the screws on the back side. Further, the upper case 11 can be removed from the lower case 12 by the reverse procedure.

The assembly work of the dot impact printer 10 is as follows. 1. a process of placing the recording mechanism 20 on the lower case 12; 2. Covering the recording mechanism unit 20 with the upper case 11 and sandwiching the recording mechanism unit 20 between the upper case 11 and the lower case 12; The upper case 11 and the lower case 12 are connected in a state where the upper case 11 is pressed toward the lower case 12.
Of these, In the process of placing the recording mechanism unit 20 on the lower case 12, first, the roller 25 of the recording mechanism unit 20 is dropped onto the roller receivers 121 and 122 of the lower case 12, and then the recording mechanism unit 20 is rotated around the roller 25. The support protrusions 125 and 126 are inserted into the rubber legs 213 and 223 by being moved.
Since the recording mechanism unit 20 is mounted with a metal member, various motors, and the like and is relatively heavy, it can be said that it is difficult to carry the recording mechanism unit 20 to an accurate position with respect to the lower case 12. However, as described above, when the roller 25 is first dropped onto the roller receivers 121 and 122, the position of the roller 25 is regulated by the right roller regulating member 123 and the left roller regulating member 124. It can be easily adjusted to the correct position. If the recording mechanism unit 20 is rotated in this state and the rubber legs 213 and 223 are lowered from above the support protrusions 125 and 126, the support protrusions 125 and 126 are naturally inserted into the rubber legs 213 and 223, so The recording mechanism unit 20 can be easily mounted.
In addition, the above 3. In a process of connecting the upper case 11 and the lower case 12 in a state where the upper case 11 is pressed toward the lower case 12, by pressing the upper case 11, the right front damper 211 against the pressing force, A repulsive force is generated by the right rear damper 212, the left front damper 221, the left rear damper 222, and the rubber legs 213 and 223. By this repulsive force, the recording mechanism unit 20 is securely fixed inside the upper case 11 and the lower case 12. Therefore, the recording mechanism 20 can be reliably fixed inside the upper case 11 and the lower case 12 without being screwed to the upper case 11 and the lower case 12.

Further, the roller 25 included in the recording mechanism unit 20 is configured to be rotatable. When the upper case 11 is not mounted, the recording mechanism unit 20 is tilted about the roller 25 as shown in FIGS. It is possible to make it. When the recording mechanism unit 20 is tilted, the rear side of the recording mechanism unit 20 is lifted. Here, the roller 25 rotates while being fitted to the roller receivers 121 and 122 (FIG. 6) to become a fulcrum, and the rubber legs 213 and 223 disposed on the rear side of the recording mechanism unit 20 are moved upward.
In order to hold the recording mechanism unit 20 in a tilted state, a support bar 40 is used. The support rod 40 is a rod-shaped member having a predetermined length, and the material thereof is not particularly limited as long as it has a strength capable of withstanding the load of the recording mechanism unit 20. As shown in FIG. 6, a support rod receiving hole 115 is formed on the side of the support protrusion 126 formed on the left side of the rear of the lower case 12. The support rod receiving hole 115 is a recess formed in the same size as or larger than the diameter of the support rod 40, and the support rod 40 can be inserted into the support rod receiving hole 115. When the recording mechanism 20 is tilted, one end of the support bar 40 is inserted into the support bar receiving hole 115 and the other end is inserted into the hole of the rubber leg 223. Is supported, and the recording mechanism 20 is held in a tilted state as shown in FIGS.

By tilting the recording mechanism unit 20 in this way, the assembly work of the dot impact printer 10 is further facilitated.
As shown in FIG. 6, a circuit board 41 is accommodated in the bottom of the lower case 12. The circuit board 41 is mounted with a control circuit for controlling the operation of each motor of the dot impact printer 10 and the recording head 30, and the circuit mounted on the circuit board 41 includes a motor mounted on the recording mechanism unit 20, Connected to the recording head 30 and the like. Therefore, in the process of assembling the dot impact printer 10, after the circuit board 41 is accommodated in the lower case 12 and fixed, wiring work for connecting the harness to the circuit on the circuit board 41 and the motor of the recording mechanism unit 20 is necessary. become. This wiring work needs to be performed after the circuit board 41 is fixed to the lower case 12. In addition, it is desirable that the circuit board 41 and the recording mechanism unit 20 be close to each other during wiring work due to the limitation on the length of the harness.

Therefore, after the circuit board 41 is fixed to the lower case 12, the recording mechanism unit 20 is mounted on the lower case 12, and the recording mechanism unit 20 is tilted and the support rod 40 is assembled. Be drunk. In a state where the recording mechanism unit 20 is tilted, the inside of the lower case 12 can be looked over from the rear side of the recording mechanism unit 20, and wiring work for the circuit on the circuit board 41 can be easily performed. In addition, since the circuit board 41 and the recording mechanism unit 20 are close to each other, wiring work can be performed without being affected by the length of the harness.
Then, after the wiring work is finished, the rear side of the recording mechanism unit 20 is lifted to largely tilt the recording mechanism unit 20, the support bar 40 is removed, and the rubber legs 213 and 223 of the recording mechanism unit 20 are supported by the lower case 12. When the protrusions 125 and 126 are fitted, the assembly of the recording mechanism unit 20 to the lower case 12 is completed. Furthermore, when the upper case 11 is put on the recording mechanism unit 20 and the upper case 11 and the lower case 12 are connected, the assembly of the dot impact printer 10 is completed.

  That is, in the assembly work of the dot impact printer 10 described above, the circuit board 41 and the bracket 18 are fixed to the bottom of the lower case 12 in advance. In the step of placing the recording mechanism unit 20 on the lower case 12, the recording mechanism unit 20 is tilted to connect each part of the recording mechanism unit 20 to the circuit board 41. Thereafter, the above 2. (2) covering the recording mechanism unit 20 with the upper case 11 and sandwiching the recording mechanism unit 20 between the upper case 11 and the lower case 12; What is necessary is just to perform the process of connecting the upper case 11 and the lower case 12 in the state which pressed the upper case 11 toward the lower case 12. FIG.

As described above, according to the dot impact printer 10 of the present embodiment, the recording mechanism unit 20 contacts the upper case 11 via the right front damper 211, the right rear damper 212, the left front damper 221 and the left rear damper 222. Since the upper case 11 and the lower case 12 are connected in a state of pressing the recording mechanism unit 20, the roller 25 and the rubber legs 213 and 214 are brought into contact with the lower case 12. Then, a pressing force is applied by the upper case 11 and the lower case 12, and a repulsive force is generated by each damper and roller 25 and the rubber legs 213, 214, and the recording mechanism unit 20 causes the upper case 11 and the lower case by the pressing force and the repelling force. It is firmly fixed to the case 12. For this reason, the recording mechanism unit 20 is firmly fixed to the upper case 11 and the lower case 12 without being screwed, so that it can be easily assembled without causing distortion.
Further, the rollers 25 disposed on the right side frame 21 and the left side frame 22 are fitted into the roller receivers 121 and 122 of the lower case 12, and the positions thereof are restricted by the right roller restriction member 123 and the left roller restriction member 124. Is done. Therefore, when assembling the recording apparatus, when the recording mechanism 20 is placed on the lower case 12, the roller 25 is first placed on the roller receivers 121 and 122, and then the recording mechanism 20 is rotated around the roller 25. If the rubber legs 213 and 214 are gradually lowered from above the support protrusions 125 and 126, the support protrusions 125 and 126 are naturally inserted into the rubber legs 213 and 214. As a result, the assembling work becomes easier and the effect of being able to be assembled with high accuracy is obtained. Further, the upper case 11 and the lower case 12 are fixed by fitting a claw 110 provided in the upper case 11 into the receiving groove 120 of the lower case 12 and further screwing it to the bracket 18. For this reason, the upper case 11 and the lower case 12 can be connected very easily.

The embodiment described above shows one embodiment of the present invention, and it is needless to say that the embodiment can be arbitrarily modified and applied within the scope of the present invention. For example, in the above-described embodiment, the configuration in which continuous paper is used as the recording medium is illustrated, but it is of course possible to use cut paper.
In the above embodiment, the right front damper 211, the right rear damper 212, the left front damper 221 and the left rear damper 222 are arranged at the upper four corners of the recording mechanism unit 20. The number is arbitrary, and the shape can be changed. Further, other detailed configurations can be changed as appropriate without departing from the spirit of the present invention.

1 is an external perspective view of a dot impact printer according to an embodiment of the present invention. It is an external perspective view of a dot impact printer. It is a perspective view which shows the structure of a recording mechanism part. FIG. 2 is a cross-sectional view taken along line AA ′ in FIG. 1. It is a top view which shows the structure by the side of the bottom face of an upper case. It is a top view which shows the structure of the upper side of a lower case. It is a perspective view which shows the state which mounted and tilted the recording-mechanism part on the lower case. It is a rear view which shows the state which mounted and tilted the recording-mechanism part on the lower case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Dot impact printer (printing apparatus), 11 ... Upper case, 12 ... Lower case, 18 ... Bracket, 20 ... Recording mechanism part, 21 ... Right side frame, 22 ... Left side frame, 25 ... Roller, 30 ... Recording head , 40 ... support bar, 41 ... circuit board, 110 ... claw, 111, 112, 113, 114 ... damper receiver, 115 ... support bar receiving hole, 120 ... receiving groove, 121, 122 ... roller receiver, 123 ... right roller regulation Members (position restricting members), 124 ... left roller restricting members (position restricting members), 125, 126 ... support projections (projections), 211 ... right front damper (elastic body), 212 ... right rear damper (elastic body), 213 ... Rubber legs (ring members), 221... Left front damper (elastic body), 222. Left rear damper (elastic body), 223... Rubber legs (ring member).

Claims (3)

In a recording apparatus in which a recording mechanism unit including a recording head is housed in an exterior composed of an upper case and a lower case,
The recording mechanism section is provided with a plurality of elastic bodies that contact the upper case, and a plurality of elastic support members that contact the lower case and support the load of the recording mechanism section. Connecting means for connecting the lower case is provided, and the upper case and the lower case are connected by the connecting means in a state where the recording mechanism is sandwiched and pressed via the elastic body and the elastic support member. ,
The recording mechanism section includes a pair of side frames that constitute both ends in the longitudinal direction, and each of the side frames includes a roller positioned on one end side of the side frame and the other end side of the side frame. A ring member facing the lower case, and the elastic support member included in the recording mechanism section is the roller and the ring member, and the lower case includes a receiving portion for receiving the roller, and the receiving member. Provided with a position regulating member for regulating the position of the roller in the portion and a protrusion inserted into the ring member,
A recording apparatus. The connecting means includes a claw projecting downward at a lower end of the upper case, a receiving groove formed in the upper part of the lower case so as to fit the claw of the upper case, and straddling the upper case and the lower case. And a bracket that is screwed to each of the upper case and the lower case,
Claim 1 Symbol placement of the recording apparatus characterized by. A method of assembling a recording apparatus in which a recording mechanism unit including a recording head is housed in an exterior made up of an upper case and a lower case,
The recording mechanism unit is provided with a plurality of elastic bodies that contact the upper case, and a plurality of elastic support members that contact the lower case and support the load of the recording mechanism unit,
Furthermore, it is configured to provide a connection means for connecting the upper case and the lower case,
A first step of placing the recording mechanism on the lower case;
A second step of covering the recording mechanism portion with the upper case and sandwiching the recording mechanism portion between the upper case and the lower case via the elastic body and the elastic support member;
In a state where the upper case is pressed toward the lower casing, the assembled by connecting means and a third step of connecting the lower case and the upper case, the recording device through the recording mechanism section, the Comprising a pair of side frames constituting both longitudinal ends,
Each of the side frames is provided with a roller located on one end side of the side frame and a ring member facing the lower case on the other end side of the side frame,
The elastic support member provided in the recording mechanism unit is the roller and the ring member,
The lower case is provided with a receiving portion for receiving the roller, a position restricting member for restricting the position of the roller in the receiving portion, and a protrusion inserted into the ring member,
In the first step, first, a roller included in the recording mechanism unit is fitted into the receiving unit of the lower case, and then the recording mechanism unit is rotated along the surface of the side frame around the roller. And inserting the protrusion into the ring member ,
A method for assembling a recording apparatus.

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