JPS618372A - Printing machine carrier holding device - Google Patents

Abstract

PURPOSE:To reduce the number of component parts and enable to assembly in a single stroke, by a construction wherein holders are fitted to both ends of a carrier shaft to which a carrier is fitted, a carrier unit is provided with a contact piece, a cover for a driving mechanism is provided with a levitation-preventing pawl, and a projected piece is provided at an edge of a base. CONSTITUTION:The carrier unit 6 is fitted to side frames 63 in a single stroke by elastically engaging engaging pawls 22 of the holders 11 to engaging parts 69. A roller 18 for guiding a sliding movement of the carrier is supported by a rail part 70 of the base 64, and by engaging the levitation-preventing pawl 20 to an engaging edge 71 of the base 64 on the outside of the projected piece 72, a rear part of the carrier 9 can be prevented from leviating, even when detaching a ribbon cassette. Accordingly, the carrier unit 6 can be easily fitted to a main frame 62 without using tools. In addition, when transporting, the carrier 9 is located at a central part, and the pawl 20 is engaged to a part near the center of the edge 71 of the base 64. Since this part is provided with the projected piece 72, this part will not slip off even on receiving a shock.

Description

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

Technical Background of the Invention and Problems Thereof Generally, a carrier is slidably held by two carrier shafts, or by one carrier shaft and a rail-shaped guide. However, it takes time to attach the carrier shaft and the guide, and it is also troublesome to attach the carrier to the guide.

Purpose of the Invention The present invention has been made in view of the above points, and an object thereof is to provide a carrier holding device for a printing machine that can reduce the number of parts and can be assembled with one touch.

SUMMARY OF THE INVENTION This invention forms a carrier unit by fitting a carrier onto a single carrier shaft, and guides the sliding movement of the carrier by bringing contacts provided on the carrier unit into contact with each other, thereby causing a separate member to slide. Furthermore, the holder attached to both ends of the carrier shaft can be attached to the side frame with one touch without using any tools.Furthermore, the carrier is equipped with a drive mechanism that drives the ribbon drive shaft. However, the anti-floating claw, which is formed integrally with the synthetic resin cover that covers this, engages with a single touch as a base, which greatly simplifies the assembly process. By forming a protruding piece on the edge of the base that increases the amount of wrap, it is possible to prevent the floating prevention claw from falling off from the base during transportation.

Embodiment of the Invention An embodiment of the present invention will be described with reference to FIGS. (1) is a platen, and at both ends of this platen (1) are mounting holes (3) into which screws (2) are inserted, and long holes (4).
A protruding piece (5) is formed.

(6) is a carrier unit. This carrier unit (6) consists of a carrier (9) that holds a ribbon cassette (not shown) using a dot head (7) and a clamp (8), which is a printing mechanism, and a timing belt that is partially fixed to the carrier (9). (9α), a carrier shaft αO that slidably holds this carrier (9), and a holder α°C that rotatably holds eccentric cams (not shown) fixed to both ends of this carrier shaft (2). , consisting of an adjustment lever α fixedly fitted to one end of the carrier shaft αO. A ribbon drive shaft αj is supported on the carrier (9). Carrier (9), part of which is shown in Figure 3.
A drive mechanism αQ is installed on the bottom surface of the carrier (9), which includes a boo IJ (14) that converts the linear motion of the carrier (9) in one direction into rotational motion, and a gear (2) that transmits the rotation of this pulley Q4 to the ribbon drive shaft α1. A cover aη is provided to cover this drive mechanism (2).This cover α is made of elastic synthetic resin, and the lower surface of this cover αη is provided with a shaft of a roller QI which is a contactor. In addition, this cover @2 is integrally formed with a plurality of locking claws projecting upward and a lifting prevention claw hanging downward. As shown in Fig. 1, the locking pawl (2) is elastically engaged with the locking hole (c) formed in the carrier (9) K.Furthermore, a holder 0 holding both ends of the carrier shaft is made of synthetic resin that has elasticity,
These holders (6) are integrally formed with locking claws (2).

Further, a pulley (product) is connected to the carrier motor (2), and a pulley (e) forming a pair with this pulley (c) is held by an L-shaped metal fitting (c).

A paper feed schnit (support) is then provided.

In other words, the paper guide surface (c) and the pair of left and right side plates -
A sheet metal paper feed frame (G) integrally formed with is provided, and a guide shaft 09, a drive shaft 0■, and a shaft (B) of the feed roller (to) are rotatably mounted on the side plate (2). Retained. A tractor for feeding sprocket paper is held on the guide shaft OD and the drive shaft 0■. The upper end of the paper feed motor (to) that drives the gear (to) fixed to the drive shaft 02 and the gear (b) fixed to the shaft (b) of the feed roller (2) is screwed to the left side plate. It is held on the motor support plate (a).

In addition, a notch) and a locking piece are formed at the bottom of both sides of the paper feed frame (1), and a mounting hole 64 into which a locking hole and a screw are inserted and a tongue piece are formed at the top of both sides. (c)
is formed.

Next, as shown in FIG. 2, a pinch roller unit member is provided. This pinch roller unit ■ consists of two roller arms 4 that hold both ends of the pinch roller (on the shaft of the car), an operating shaft fitted to these roller arms 4, and one end of this operating shaft ring. It consists of a fixed intermediate lever shaft υ and an operating lever shaft connected to the operating shaft via the intermediate lever ←Dt. A boss ring that fits into the operating shaft wheel is formed on one side of the roller arm 〇, and a spring pin 61 that is press-fitted into the operating shaft wheel is formed on the opposite side of the boss.
) is formed in the slit that is engaged with and locked. The intermediate lever φρ is also formed with a boss (4) that fits into one end of the operating shaft (2), and this boss (4) is formed with a slit (4) that is fixed to a spring pin (t4) press-fitted into the operating shaft (2). . Furthermore, two recesses ◇he are formed in the intermediate lever ]), and a protrusion ◇he that engages with either one of the recesses 6η (to) and the intermediate lever ψυ are formed in the operating lever 6.
An extension surface facing the side surface of the intermediate lever shear and a bent piece Oρ facing the lower edge of the intermediate lever shear are integrally formed.

A main frame la made of die-cast aluminum is provided. This main frame ti9 has a pair of left and right side frame branches, a pace, and a paper guide (2) that faces the paper guide surface of the paper feed frame (to). Supports are integrally formed at the side frame branch as attachment parts for the platen (1), and these supports have long holes (4) in the platen (1).
) is fitted into the platen (1) to prevent the platen (1) from moving in the left-right direction, and a screw hole facing the mounting hole (3) is integrally formed. Furthermore, the side frame is provided with a hook portion which elastically engages with the locking claw (2) of the holder α as a mounting portion for the carrier shirt (QO).

The base is formed with a rail portion (70) that supports the roller (to) of the carrier unit (6) and a locking edge (c) that elastically engages with the floating prevention claw. A protruding piece (c) that increases the amount of overlap with the anti-float pawl is integrally formed in the center of the retaining edge (c).

Slopes (72a) are formed on both sides of this protruding piece (2) so that the width thereof gradually becomes narrower. Further, the protruding piece (2) is slightly thinner than the wall thickness of the base, thereby forming a stepped portion (c) on the lower surface of the pace.

Further, a mounting seat (74a) for the carrier motor (to) is formed on the left side frame (■), and a mounting seat (74a) for screwing the metal fitting (C) for holding the pulley (C) on the right side frame (■). (74b) is formed.

Furthermore, the paper feed 9 is provided at the rear of the left and right side frames ■.
Mounting bases (C) are integrally formed as the mounting portion of the unit (A), and these mounting bases (C) have the locking holes (6).
A hook q, which extends upward and bends backward to engage with the locking piece 0, and a screw hole corresponding to the mounting hole () are formed, and a fifth mounting portion is formed as a mounting portion that engages with the locking piece 0. As shown in the figure, a protrusion (7) is integrally formed on both side frame rings. Also, a groove 90 into which the lower end (39a) of the motor support plate (to) is fitted is formed on the left side. It is formed on the frame ring.Furthermore, the main frame ti
Side guides ■ that guide both sides of the paper are integrally formed on both sides of the base comb guide ■ of No. 2, and these side guides
It protrudes upward from the notch θ1 formed in 1).

Next, as shown in FIG. 2, a fitting part 69, which rotatably fits one end of the operating shaft, is integrally attached to the back surface of the base guide (1) as a mounting part of the Vinci-Rosea unit (64). A fitting part (2) is formed on the right side frame, and the fitting part (2), which rotatably fits into the intermediate lever 6υ, is formed on the right side frame. A support shaft that rotatably holds the handle and a presser piece that prevents the single wheel from being removed from the support shaft are integrally formed. Further, on the back side of the paper guide, there are a receiving part (■) for receiving the coil spring (C) fitted to the rear part of the roller arm (4), a receiving part (■) for supporting the operating shaft wheel, and an arm for guiding both sides of the roller arm (61). The guide ■ is integrally formed.

Further, a plurality of notches (2) are formed in the lower part of the base guide (2) in which the feed roller G3 and the pinch roller Q force are positioned. The paper feed frame (c) is also formed with notches corresponding to these notches (2).

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 (2). It can be installed by matching.

The carrier unit (6) can be attached to the side frame with one touch by elastically engaging the 0th locking claw of the holder with the hook part IMS. The roller 0 is supported by the rail part 0 of the base, but it can be removed from the carrier (9) by engaging the floating prevention claw (a) with the pace locking edge (c) on the outside of the protruding piece (c). Even when the ribbon cassette is removed, the rear part of the carrier (9) can be prevented from floating. As a result, carrier unit (6) F
It can be easily installed on the main frame ■ without using any tools.

Then, screw the metal fitting (c) to the mounting seat (74b),
Install the carrier motor 4 on the mounting seat (74a), fix it with a nut, and wind it around the timing belt (9a) and pulley (c).

Paper feed frame (To)
Fit the locking hole (9) into the hook 17fe, slide the paper feed frame (g) toward the platen (1), engage the locking piece 1a with the protrusion fFj, and insert it into the mounting hole. It is assembled by screwing the screws into the screw holes (c).

As shown in Figure 5, the paper feed frame (to)
As long as it does not move backward, it will be prevented from floating upward by the hook and protrusion (c), so even if the screw (0) is omitted, it will become a tongue piece) and the paper will be folded downward. The paper feed frame (a) can be fixed simply by preventing the feed frame from moving backwards. In this state, the lower end (3k) of the motor support plate (2) is held in the groove (c) K of the side frame branch, so that it can be securely fixed in a dual-supported state to prevent swinging. Therefore, the number of attachment points for the support plate (a) to the paper feed frame member can be reduced.

The pinch roller unit is installed as follows. First, connect one end between the operating shafts connecting the two roller frames 4 to the fitting part ← IK fitting, and then connect the boss t of the intermediate lever ■.
4t - Fits into the other end of the operating shaft while fitting into the fitting ring,
A spring pin prevents rotation of the operating shaft ■ and the intermediate lever. At this time, the receiving part (■) supports the operating shaft and prevents the shaft center from wobbling, so that the operating shaft is fitted into the fitting part 6υ and the intermediate lever 6 is fitted into the fitting part (■) and the operating shaft. Fitting can be easily performed with the axes aligned. Also, at this time, the roller arm 0I is inserted into the arm guide junction, and the coil spring (2) is supported by the receiving part -. Next, the operating lever (to) is placed in a substantially horizontal position, fitted onto the support shaft (2) of the right side frame wheel, and then rotated to a substantially vertical position. This allows the presser piece to move to the support shaft.
The extension surface of the operating lever ■ prevents the operating lever from coming off from the intermediate lever F)υ from the mating part and the operating shaft.
Prevent the slippage.

Thereby, the pinch roller unit can be easily attached to the main frame without using any tools.

When printing, the timing belt (9a)t' is driven by the carrier motor 4 to move the carrier (9) to the platen (1).
). At this time, since the roller 08 rolls on the rail portion qQ of the base, there is no need to use a separate rail member. Further, instead of the roller 6g, a chip with a small friction coefficient may be fixed.

Even when removing the ribbon cassette from the carrier (9), lifting of the carrier (9) from the base can be prevented by the lifting prevention claw. When printing on sprocket paper, the feed roller 01 is separated from the pinch roller O'I)1. That is, as shown in FIG. 4, when the operating lever 6 is rotated in the direction of the arrow from the state where the protrusion engages with the recess (B) and the protrusion engages with the recess @VC, the intermediate lever ψυ
rotates counterclockwise, causing the operating shaft diagram and roller arm 4 to rotate counterclockwise.

As a result, the pinch roller Ono is retracted downward.

In this state, the sprocket paper is intermittently fed by the tractor 0→. To send vapor other than sprocket paper, rotate the operating lever IFtl in the opposite direction of arrow A, and use the return force of the coil spring ■ to rotate intermediate bar 4, operating shaft, and roller arm 0 clockwise. to press the pinch roller 0 to the feed roller (to).

During transportation, the carrier (9) is positioned at the center and engaged near the center of the locking edge (C) of the floating prevention claw C21-base (goods). Since this portion is formed with a protruding piece (2), the floating prevention pawl will not come off the locking edge (c) even if it receives a shock. The floating prevention claw (A) is attached to the locking edge (
2), but due to the formation of the stepped portion f3, the contact area with the base plate does not increase even when passing through the protruding piece (c), and therefore the sliding is uniform and small. The carrier (9) can be slid with resistance.

In addition, as shown in FIG. 6, protruding pieces (2) may be formed on both sides of the base and the round part 4. In this case, the anti-levitation pawl elQt is engaged in the central part of the locking green @ where there is no protruding piece), and assembly is easily performed. When transporting, place the carrier (9) on the left or right side,
The protruding piece (2) prevents the anti-float claw from falling off from the locking edge (2).

Effects of the Invention Since the present invention is configured as described above, the carrier is guided by one carrier shaft and the pace is used as a guide member. It can be held slidably, which eliminates the need for a separate guide to support the rear of the carrier, and allows the carrier shaft to be attached to the side frame with a single touch using the holder. cover cover
.

The anti-floating claw formed on the plate engages with the pace to prevent the carrier from floating away from the pace, but the anti-floating claw allows the carrier unit to be attached to the pace with a single touch.
Therefore, the number of parts can be reduced and assembly work can be performed extremely easily.Furthermore, the protruding piece formed on the pace can reliably prevent the carrier unit from falling off from the pace due to shock during transportation. It has the following.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is an exploded perspective view from the back showing the pinch roller unit installed, and FIG. 3 is an enlarged vertical right side view. Figure 4 is an enlarged side view of the pinch roller unit, Figure 5 is an enlarged vertical left side view showing the attached state of the paper feed frame, and Figure 6 is a modification of the means for forming the protruding piece on the pace. FIG. 2 is a partial perspective view showing an example. l...Platen, 6...Carrier unit, 7...
・Dot head (printing mechanism), 9...Carrier, 10
...Carrier shaft, 11...Holder, 13...
・Ribbon drive shaft, 16... Drive mechanism, 17... Cover, 18... Roller (contact), 20... Levitation prevention claw, 22... Locking claw, 63... Side frame ,6
4... Pace, 71... Locking edge (edge of pace),
72...Protruding piece, 73...Step part

Claims (1)

[Claims] 1. A carrier equipped with a printing mechanism and a drive mechanism for driving a ribbon drive shaft is slidably fitted onto a carrier shaft to form a carrier unit, and elastically engaged with a side frame. a holder having locking claws formed thereon is attached to both ends of the carrier shaft, a contact supported by a base is provided on the carrier unit, and a cover made of an elastic synthetic resin is attached to cover the drive mechanism; An anti-floating claw that elastically engages with an edge of the base to prevent the contact from floating from one surface of the base is integrally formed on the cover, increasing the amount of overlap with the anti-floating claw. A carrier holding device for a printing machine, characterized in that a protruding piece is integrally formed on a part of the edge of the base. 2. The carrier holding device for a printing machine as set forth in claim 1, wherein the protruding piece has a reduced wall thickness and a stepped portion is formed on the side of the edge of the base opposite to the contact.