JPS60105573A - Printer - Google Patents

Abstract

PURPOSE:To simplify assembling by forming an integral construction of a main frame consisting of a pair of right and left side frames, a base and a paper guide and then, attaching a pinch roller unit to the main frame. CONSTITUTION:A main frame 62 made of die-cast aluminum is integrally formed with a pair of right and left side frames 63, a base 64 and a paper guide 65. Further, integrally installed in the paper guide 65 are, in the back of guide 86 as an installation place of a pinch roller unit 46, a receiver 81 into which one end of an operation shaft 50 fits and freely rotates therein; in the right side frame 63, a receiver 82 into which a boss 56 of a middle lever 51 fits and freely rotates; a stopper 84 which stops slipping of an operation lever 52 from a supporting shaft 83; receivers 86 that receive coil springs 85 that fit into the back of roller arms 49; and roller guides 88 that guide the both sides of the roller arms 49.

Description

[Detailed description of the invention] Technical field of invention The present invention relates to a printing device.

Technical Background of the Invention and Its Problems In a printing device, the minimum necessary main mechanisms include a platen, a carrier, a carrier shaft for guiding the carrier, a paper feed mechanism, a pinch roller mechanism, and other motors. Furthermore, a plurality of frame structures are provided to support these mechanisms, including a pair of left and right side frames, a pace that serves as a bottom plate, and a paper guide plate that also serves as a strength member of the frame structure. As a result, the number of parts increases and assembly work becomes troublesome.

Purpose of the Invention The present invention has been made in view of the above points, and it is possible to reduce the number of parts and facilitate the assembly work, and in particular, to enable the pinch roller unit to be attached to the main frame without using a separate support member. Moreover, it is intended to provide a printing device that can increase the rigidity of the main frame structure.

Summary of the Invention This invention provides a main frame in which a pair of left and right side frames, a base, and a paper guide are integrally formed, thereby increasing the rigidity of the main frame and reducing the number of main frame components. The pinch roller unit is configured to be attached to the main frame without using any other supporting parts, thereby simplifying the assembly work.

Examples of the invention An embodiment of the present invention will be described based on the drawings.

(14 is a platen, and a projecting piece (5) having a J+G hole (3) into which a screw (2) is inserted and a long hole (4) is formed at both ends of this platen (1).

(6) is a carrier unit. This carrier unit (6) includes a carrier (9) that holds a ribbon cassette (not shown) by a dot head (7) which is a printing mechanism and a clamp (8), and a part fixed to the carrier (9). The timing belt (9), this carrier (9), the carrier shaft uO which holds the carrier shaft ← in a slidable manner, and the holder α℃ which rotatably holds the eccentric cams (not shown) fixed to both ends of the carrier shaft ←1. and an adjustment lever (2) fixedly fitted to one end of the carrier shaft αO.A ribbon drive shaft αj is supported on the carrier (9). A transmission mechanism 00 is attached to the lower surface of the carrier (9), which includes a pulley α4 that converts the linear motion of the carrier (9) in one direction into a rotational motion, a gear 09 that transmits the rotation of this pulley 0 to the ribbon drive shaft αj, etc. A cover 〇〃 is provided to cover this transmission mechanism α6.This cover 〇no is made of elastic synthetic resin, and the shaft of the roller αυ is elastically fitted to the lower surface of this cover αη. In addition, a plurality of locking claws (1) projecting upward and a locking claw (1) hanging downward are formed externally on this cover 〇η, and are engaged as shown in Fig. 1. The retaining pawl α is elastically engaged with a retaining hole Q) formed in the carrier (9). In addition, career shirt) QO
The holders 02 that hold both ends of the are made of synthetic resin with elasticity e, and these holders o2 have locking claws (a).
formed externally.

Further, a pulley (C) is connected to the carrier motor (A), and the pulley (C) paired with the boo 9 (C) is held by an L-shaped metal fitting (A).

Next, a male (feeding unit (b)) is provided.

In other words, a paper feed frame made of sheet metal is provided which integrally forms a paper guide surface) and a pair of left and right side plates, and the side plates have a guide shaft 01), a drive shaft 0→, and a feed roller ( The shaft (c) and the shaft (b) are held rotatably. A tractor (c) for feeding sprocket paper is held on the guide shaft 0 force and the drive shaft 0.

Gear (G) fixed to drive shaft 0→ and feed roller 03
A paper feed motor (2) that drives a gear (Of) fixed to a shaft (B) of is held at its upper end by a motor support plate screwed to the left side plate.

At the bottom of both sides of the paper feed frame (1), a notch) and a locking piece θη are formed, and at the top of both sides, a locking hole (6) and a mounting hole into which the screw 01 is inserted and a tongue are formed. ) is formed on the piece.

Next, as shown in FIG. 2, a pinch roller unit (c) is provided. This pinch roller unit 0Q has two roller arms that hold both ends of the pinch roller (on the axis of the pinch roller), and these roller arms.
An intermediate lever Q5υ is fixed to one end of the operating shaft, and an operating lever Q5υ is connected to the operating shaft via an intermediate lever shaft. A boss □□□ that fits into the operating shaft is formed on one side of the roller arm (4I). The intermediate lever shaft υ is also formed with a boss that fits into one end of the operating shaft, and this boss has a slit ring that is prevented from rotating by a spring bin that is press-fitted into the operating shaft. In addition, the intermediate level
Two recesses @- are formed in the eυ, and the operating renocou (corporate) has a protrusion that engages with one of the recesses (), an extension surface r4 facing the side surface of the intermediate lever βυ, and an intermediate lever ←. JiI1 piece 0υ facing the lower edge of υ is integrally formed.

However, the main frame lid is made of aluminum die-casting.
is provided. This main frame has a pair of left and right side frame wheels, a pace, and a paper guide ■ that faces the base 2 (- guide surface (c)) of the paper feed frame (g). Side frame rumor → Supports are integrally formed as mounting parts for the platen (1), and these supports have long holes () in the platen (1).
A protrusion that is fitted into the flatten (4) and prevents the horizontal movement of the flatten (1) and a screw hole that faces the mounting hole (3) are integrally formed. , a side frame is attached to the carrier shirt) (A hook part IKe that elastically engages with the locking claw of the holder (111) is formed as a mounting part of the holder (113).

The pace is formed with a rail portion qQ that supports the roller 08 of the nII carrier unit (6) and a locking edge C1υ that elastically engages with the locking claw.

In addition, the U-shaped mounting hole (7za) into which the screw 4 protruding from this carrier motor (to) is inserted is the mounting part for the carrier motor (c) on the left side frame.
is formed. Nuts q and I are screwed into the screw (a). Further, a mounting seat Q4 is formed on the right side frame to which a metal fitting (C) for holding the pulley (E) is screwed.

Further, a mounting base g0 is integrally formed at the rear of the left and right side frame wheels as a mounting portion for the paper feed unit (B), and these mounting bases (C) have a mounting base g0 that engages with the locking hole (6). Hook V that extends upward and bends backward to fit
fJ and a screw hole 0 corresponding to the mounting hole (goods) are formed, and a protrusion Q pass is integrated into both side frame branches as shown in FIG. 5 as a mounting part that engages with the locking piece @ It is formed as follows. Furthermore, a groove (c) into which the lower end (39cL) of the motor support plate (to) fits is formed in the left side frame branch. Further, side guides (■) for guiding both sides of the paper are integrally formed on both sides of the paper guide imported from the main frame, and these side guides (■) are connected to the paper feed frame (1).
It protrudes upward from a notch G1 () formed in the.

Next, as shown in FIG. 2, a fitting part 6υ that rotatably fits one end of the operating shaft (7) as a mounting part of the pinch roller unit 0→ is integrally attached to the back of the paper guide. A fitting portion (2) is formed at the right side frame branch, and is fitted to the central boss (T) of the intermediate lever so as to be fully rotatable. In other words, the fitting part (2) indirectly holds the operating shaft (7) via the boss. Also, on this right side frame, there is a support shaft for rotatably holding the operating lever 6, and a holding piece (b) for preventing the six operating levers from being removed from the support shaft (b). is formed. Furthermore, on the back of the paper guide, there is a receiving part ■ that receives the coil spring fitted to the rear part of the roller arm (6), a receiving part that supports the operation shaft, and a receiving part that supports both sides of the roller arm @. The arm guide ■ is integrally formed.

Furthermore, at the bottom of the paper guide, there are a plurality of notches in which the feed roller (l) and the pinch roller (l) are located.
is formed. The paper feed frame (to) is also formed with notches corresponding to these notches (2).

Returning to FIG. 1, switch mounting pieces O are integrally formed on both sides of the pace. One switch mounting piece is used to attach a detection switch (not shown) that detects the home position of the carrier (9), and the other switch mounting piece is used when the carrier (9) has moved excessively to the right. This is to install a safety switch (not shown) that detects this and stops the carrier motor (e).

Furthermore, the lower edge of the paper guide is covered with a Mylar sheet)
The adhesive surface for adhering is integrally formed. This mylar sheet) is used to press the paper inserted between the paper guide (3) and the paper guide surface (c) against the platen (1).

In this configuration, the platen (1) has long holes (4) at both ends that fit into the protrusions of the support column, and screws (2) inserted into the mounting holes (3) into the screw holes of the support column. It can be installed by matching.

Several carrier units (6) are hung on the main frame 19 by elastically engaging the locking claws (2) of the holder α force with the hook portions. The roller αυ is supported by the rail part (/I) of the base, but by engaging the locking claw (A) with the locking edge (71) of the base, it is possible to prevent the rear part of the carrier (9) from floating. As a result, the carrier unit(s) can be easily attached to the main frame without using any tools.

Then, screw the metal fittings (C) onto the mounting seat Q4, pass the screws (2) of the carrier motor (E) through the mounting holes (7 holes), screw the nuts Q→ onto these screws, and attach the timing belt ( Wind 9a) around the pulley (c).

Paper feed reunit l-(a) is the paper feed frame (
(to) locking hole θ′4f: Slide the hook V (fitted to D and paper feed frame C31) toward the bluff (1) side, engage the locking piece (B) to the protrusion Q→, and open the mounting hole. u4
It is assembled by screwing the screw θ1 inserted into the screw hole (C).

As shown in Figure 5, the paper feed frame (to)
Unless it moves backward, the hook fl and the protrusion O'→ will prevent it from floating upward, so even if the screw ring is omitted, the paper feed frame ) The paper feed frame (1) can be fixed simply by preventing backward movement of the paper feed frame (1). In this state, the lower end (a9cL) of the motor support plate 0→ is held in the groove ffl of the side frame, so that it can be reliably fixed in a dual-supported state that prevents vibration. Therefore, the number of attachment points for the motor support plate (to the paper feed frame (1)) can be reduced.

(to the pinch roller unit) as follows. First, one end of the operating shaft connecting the two roller arms θ field is fitted into the fitting part 6υ, and while fitting the boss member of the intermediate lever υ into the fitting part ■, the other end of the operating shaft (7) is fitted. It fits into the end and prevents rotation of the operating shaft wheel and the intermediate lever lever using a spring pin. At this time, the receiving part () supports the operating shaft () and prevents the shaft center from wobbling, so that the operating shaft (4) is fitted into the fitting part 8υ, the intermediate lever Gυ's fitting part and the operating shaft ring Fitting can be easily done with the axes aligned. Also, at this time, the roller arm 1 is inserted into the arm guide junction, and the coil spring (2) is supported by the receiving part (2). Next, set the operating lever shaft to a nearly horizontal position and press the right side frame l! After fitting into the support shafts of i and j, it rotates toward a substantially vertical position. For this,
Presser piece (to) supports +11+ Operation lever 6 from QG9
→ is prevented from coming off, and the extension flush with the operating lever) prevents the intermediate lever υ from coming off from the fitting part (a) and the operating shaft. Thereby, the pinch roller unit θQ can be easily attached to the main frame without using any other support members or tools.

During printing, the timing belt (9α) is moved along the carrier (9) and the t-platen (1) by the carrier motor (to). When printing on sprocket paper, release pinch roller Ω from feed roller 0. That is, as shown in FIG. 4, when the operating lever shaft is rotated in the direction of arrow A from the state where the protrusion engages with the recess 6'i) and the protrusion engages with the fourth part, the intermediate lever ψυ rotates in the anti-poetry direction, causing the operating shaft (7) and roller arm (to) to rotate in the counterclockwise direction. As a result, the pinch roller 171 is retracted downward. In this state, the sprocket paper is intermittently fed by the tractor (c). To feed paper other than sprocket paper, rotate operating lever 6 in the opposite direction to arrow A, and use the coil spring return force to rotate intermediate lever 0, operating shaft, and roller arm 4 clockwise. and press the pinch roller 03 against the feed roller 03.

In this way, the main frame 1 does not have the side frame branches, base shaft, and paper guide formed externally, so it has high rigidity, reduces the number of parts, and promotes labor saving in assembly work. be able to.

Effects of the Invention As described above, this invention forms a main frame by integrating a pair of left and right side frames, a base, and a paper guide, so it is possible to reduce the number of frame components, and in particular, it is possible to reduce the number of frame components. It is possible to simplify the assembly work by attaching the pinch roller unit to the main frame without using it, and also has the effect of increasing the rigidity of the main frame.

[Brief explanation of the drawing]

The drawings show an example of this invention.
The figure is an exploded perspective view, Figure 2 is an exploded perspective view from the back showing the pinch roller unit installed, Figure 3 is an enlarged vertical right side view, Figure 4 is an enlarged side view of the pinch roller unit, FIG. 5 is an enlarged vertical left side view showing the attached state of the paper feed frame. l...Platen, 6...Carrier unit, 7...
・Dot head (printing (1[), 9...carrier, l
O...Carrier shaft, 23...Carrier motor, 27...Paper feeding υ unit, 33...Feed roller, 38...Paper 7 (-)' motor, 46...
・Pinch roller unit, 47...pinch roller,
49... Roller arm, 50... Operation 4ib, s
z...Operation lever, 62...Main frame, 63
...Side frame, 64...Base, 65...
Paper guide, 81, 82...Mating portion, 85...
・Coil spring, 86... Receiving part, 88... Arm guide Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] A carrier unit in which a carrier equipped with a printing mechanism is slidably fitted onto a carrier shaft, a platen, a paper feeding unit equipped with a feed roller driven by at least a pace feed roller, and a paper feed unit that drives the fiiJ carrier. A main frame is provided in which a pair of left and right side frames, a pace guide supporting the recording i to be supplied to the platen, and a pace facing the carrier unit are integrally formed. The carrier unit, the platen, the paper feed υ unit, and the carrier motor are attached, and the feed roller is attached to the tip of a plurality of roller arms fixedly fitted to the operation IrIII connected to the operation lever (-). A bi-) number-one unit f in which the contacting pinch rollers are rotated freely and one end of a coil spring is attached to the rear of these roller arms.
tv#+- A fitting part that rotatably holds the operating shaft on the back side of the paper guide of the May 77 L'- arm, an arm guide that guides both sides of the roller arm, and the other end of the coil spring. A printing device characterized by being integrally formed with a receiving part that supports the.