JPS60105570A - Structure of printing device - Google Patents

Abstract

PURPOSE:To arrange so that maintenance service may be feasible by dividing the device into groups such as representing a functional part which originally requires rigidity, a functional part only requiring mutual rigidity and a functional part whose relative position relationship may be considerably flexible. CONSTITUTION:A basic structure 18 having sides 16, 16' where a platen 9, a pulley for type belt run 10, 10', a pulley driving mechanism 11, a ribbon running mechanism 12, etc. are provided, is made rigid as a monolithic structure of plating. On this structure 18, side plates 21, 21' for attaching a stay 20 provided with a hammer magnet, a flexible guided structural part 19 free from torsional influence are attached through the engagement of a guide 16a, 16b with a guided engagement part 21a, 21b. Then the whole arrangement described above is positioned with a cam 13 and a cam follower part 21d set in a mutually abutting position. In addition, a paper feed unit is provided on this structural part 19. Thus it is possible to obtain a reproducibility and relative rigidity of relative position during printing, separate the unit structure without concern about rigidity and improve maintenance service and operating property.

Description

[Detailed Description of the Invention] <Field> The present invention relates to the mechanical part of a printing device, and in particular, it facilitates the assembly of 4P construction, which is how to construct and arrange each functional part, and achieves functional satisfaction. This relates to the structural structure of the mechanical part.

<Prior art and background> Mechanical part of printing device, for example, line printer
・It consists of a type running part with a platen on the back side, a printing machine magnet equipped with a large number of hammers with driving means such as magnets in the direction of the printing digits, a paper feeding mechanism part, a ribbon part, etc., and supported by the platen. In this system, the running type and the printing hammer are opposed to each other, and a sheet of paper and a ribbon are interposed between the opposed parts, and the running type is captured by the printing hammer in a time-division selective manner to print.

The layout of each machine 1i1 in this arrangement is as shown in FIGS. 1 and 2, for example. In such a device, when printing, the striking part of the printing hammer and the type running part supported from the back by the platen are located at predetermined vertically and horizontally opposing positions and at predetermined front and back intervals, and horizontally and horizontally when viewed from the printing digit direction. It is necessary to position the sheets accurately without any difference in the spacing between them, and to make it possible to adjust the facing distance according to the thickness of the paper, and to make it possible to greatly increase the facing distance to facilitate paper replacement. Therefore, the part with the printing hammer magnet and the part with the type running part are separate units and are guided in such a way that they still have a degree of freedom for movement in the back and forth direction when viewed from each other. In the front-back direction, a means for adjusting the mutual position (degree of freedom regulation) has been provided to create a mechanical structure that satisfies the above requirements, as shown in Figure 1.2. A side plate 2' is attached to the side plate, and a stay 4 for attaching the printing hammer magnet 3 is attached to this side plate.The side on which the paper feed mechanism is assembled is the fixed (reference) side structure A, and both sides of this fixed side structure are Between the heald unit side or both side plates 22' on which the type heald drive unit, platen, ribbon, etc. are placed, via the guide bin 5.5' provided on the plate 2.2' as a position reference. Positioning was provided by an adjustable facing positioning mechanism to ensure facing relationship between the ζ hammer and the type.

However, in order to ensure the facing relationship, this structure not only requires a rigidity of 121 degrees on the structural side that is fixedly assembled to the base 1, that is, the reference side, but also in order to run the type in a predetermined vertically opposing position. On the heald unit side, not only a considerable degree of precision but also rigidity is required, and since they are rigid, it is impossible to limit the accuracy of the position. There is a problem that if the rigidity is made to be large, it is difficult to ensure reproducibility, and even if die casting is used to create a structure with high structural rigidity, the rigidity can be ensured, but it will inevitably be structurally large.

It had the disadvantage that it was heavy and could not be lowered even with a 21st stroke.

As for the structure of the device, ease of assembly and handling during maintenance is of course an issue, and it is possible to easily disassemble the parts that need to be maintained so that it is easy for maintenance personnel to do so. It is also required to be able to reproduce the assembly with the original relative positional accuracy, but in this configuration, only the bottom surface remains on the fixed structure side, and the structure attached to the structure fixed to the base can be reassembled. It is not a very convenient method from an operational point of view to perform maintenance up to that point, and there is a problem in that increasing the number of removable units in an attempt to improve operability increases costs.

<Purpose and Features> In view of the above, the present invention provides a structure (layout) that solves these problems considerably and comprehensively. structure, belt unit), and functional parts that originally only require relative positional relationship and mutual rigidity in the assembled state (e.g. type, between hammers),
Essentially, it is necessary to ensure a strict relative positional relationship for specific degrees of freedom, and for functional parts that can be quite loose (for example, 1 IE feed), and for functional parts such as The objective is to provide a refined UniSoI structure of a printing device by grouping together items belonging to the required functional level and treating them as the same unit as possible.

In order to achieve the above object, the present invention has a plane on the front side, and parallel side parts formed perpendicularly to the upper plane and extending from the front side to the rear side, and the upper plane A 411-character traveling means is attached to the above-mentioned side parts 1): A base structure having a pair of guide means on the I side and the back side, a stay to which a hammer magnet is attached, and a stay on both parallel end surfaces of the stay. It has a guided structure part consisting of a pair of side plates attached thereto, forming a guided part that fits vertically with each guide of the guide means on the side plates, and attaches the guided part 1' structure to the base structure part. Further, the relative position in the +111 rearward direction is determined by the engagement of the cam means and the cam follower by installing cam soles on both side plates of the cam means 1 on both sides of the base structure. Furthermore, the guided structure has a cam follower on the side closer to the relative position and a cam follower on the side farther away from the relative position on both side plates of the guided structure, so that the relative position can be moved toward the closer side and the open side by operating the cam means. The invention further includes an engaging portion that performs relative positioning of the guide structure and the guided structure in the left-right direction at a position on the side where the guide structure and the guided structure approach each other, and further, when the guided structure is in the open side position. In order to allow the guided structure to be removed, the front lower part of the guided structure is cut out to form an opening through which each guide can pass, and furthermore, an opening is formed through which each guide can pass. A paper feeding unit that forms a section, has an engaged section and a position floor on the lower surface at the back of both ends, and has a section facing the upper end surface of the stay is engaged with the engaging section and the engaged section. It is screwed onto the top end of the stay.

<Embodiment> Figures 3 to 12 are explanatory diagrams of an embodiment of the present invention, and the difference from the configuration shown in Figures 1 and 2 is that the structure does not have a so-called base plate and is connected to the casing structure on the bottom surface. The feet are parallel to each other at least on both sides, and the platen 9 and type heald 15 are running pulleys 10 and 1 on the front side.
0', pulley drive transmission mechanism 11. IJ bong traveling mechanism 12
16 and 16' for forming a guide on the rear side, and a guide stand for mounting a guide roller is formed on the side surface. Install the rollers and guide 16
a, 16b', 16a', and 16b' are base '/II+, and the side structure is a one-piece sheet metal structure, so to speak, the base and helt unit structure shown in Figures 1 and 2, and the base side structure. A structure is prepared in which a functional unit that also requires rigidity can be installed as a part of the side plate, and both parallel end surfaces of the stay 20 with a hammer magnet placed on top of this reference side structure 18 are provided. 20a, 20a', the guided structure part 19 has a sheet metal side plate 21, 21' having a guided engagement (li) of 1 at the front and back formed to be attached to the guided structure part 19, which is a flexible structure at least with respect to torsion. 4 guides 16a, 16b, 16a', 16b, two of which are provided on both sides of the structure on the heath side, engage with the guided engagement parts 21a, 21b, 21a', 21b', respectively. The assembly position can be determined by attaching it in the shape.

At the positions on the base structure side of both side plates where the guides are engaged, there are guided engaging portions 21a, 21b, 21a' which are movable in the horizontal direction and which fit the outer diameter of the guides vertically.
, 21b' and the parts 21d, 21d that follow the cam mechanism 22 for articulating the relative position in the front and rear direction when engaged with the engaging portion and for widening the facing interval when exchanging paper, etc. At the same time, the fitting portion forming the above-mentioned engaging portion is configured such that in the position where the opposing distance is wide open, only the upper side is missing the guided portion on the lower side as shown in 21c and 21c'. If you say so, 2
At the position shown in FIG. 2, the structure is such that it can be removed simply by holding the notch, the closed structure, that is, the entire guided structure 19.

The force J6 mechanism is the shirt 11 that penetrates the base side structure.
By operating the left and right cams 13, 13' which are interlocked by 3n with the operation lever 13b, the opposing distance for printing is adjusted by pulling the follower parts 21d, 21d that engage with the cams 13, 13' towards each other. Positioning pins 14, 14' are protruded from the stay side between the base structure 18 side and the wave force 1-1 structure 19 side, and fitting holes are provided in the opposing part on the base structure side. 18a, and the opposing positions on the top, bottom, left and right are finally determined relative to each other, and elastic rubber 14a is used to generate force on the return side.

, 41a, the cam 13.13' and the corresponding pawl "
It is configured to generate a contact force between the lower part 21 () and 'l l'tl and maintain the interval between the phases 14 in an adjustable manner. As shown in Fig. 7, the force J cutlet 7 parts 21e and 21'e on the opposite side of Xl are prepared with a certain clearance on the side of the guided structure, as shown in Fig. By moving 21e and 21C to the open side with a force J, the entire guided structure 19 is pushed to the back side, thereby making it possible to create an interval during paper exchange, that is, an open state.What is this? Sometimes, the guide on the base structure side and the engaging part on the guided side are configured so that the lower engaging part can be seen, as shown in 21C, so the guided structure just rests on the guide with its own weight and cannot be lifted in this state. This allows it to be removed as a unit without any other operations.

8 and 9, the mechanism for adjusting the opposing distance between the printing reservoirs will be explained. The mechanism for adjusting the opposing distance between the printing reservoirs is explained below. The mechanism is connected to the operating lever 13b and has cams 13 and 13' fixed on both sides, and has a base structure. The shaft 13a passing through the
Looking in more detail, the eccentric shaft 23, which also passes through the base structure, passes through it in an eccentric position and in a fitted state, and furthermore, the eccentric shaft passes through both sides of the base structure in a fitted state. It has a heavy mating configuration. In order to adjust the opposing distance according to the paper thickness, the eccentric shaft 2; 3 should be used instead of the cam side.
All you have to do is rotate it a predetermined amount. For this reason, in this embodiment, the pin lever 2 is fixed to the eccentric shaft by a clamper connection.
4 and a helical shaft 25 which is rotatably mounted on the upper surface plate of the base structure and has a grip on the upper surface side and a helical groove 25a on the lower surface side, and the helical groove 25a of the helical shaft The pin 24 of the pin lever 24 is structured to engage the J,
By rotating the knob 24 for adjustment, the opposing distance can be adjusted without rotating the cam on the operating lever side.

By attaching a wire to the operation lever that opens and closes the guided unit opening/closing structure of this configuration, it is linked to the open state. A slanted counterpart located below the printing section of the paper path that pulls the paper from the unprinted paper stock section at the bottom of the device through the printing section and sends it out at the paper feeding section, and is hinged above. It guides the paper along the side paper guide 28 by lightly holding it down with its own weight, and monitors the sandwiched paper 8. When the paper runs out, the protrusion 26a presses the sensor 27 (micro switch), and the paper ends. However, when replacing paper, it is desirable for operability not only to ensure that the space between the type belt and the printing hammer is open, but also to lift the presser plate 26 to secure the paper entry path. In a configuration in which the operating lever 13b is opened from the front to the back to widen the space between the type belt and the printing hammer, the operating lever can be moved to the back by connecting the operating lever and the press plate with a wire 29. The presser plate can be lifted up by the wire, and it can be opened and closed in conjunction with an extremely simple structure.Since it is linked by wire, only a very thin communication puff is required, and the path may be slightly curved, so there is no need to worry about the passage route. Not only is it almost unnecessary, but since the slack side is free, it is possible to press the paper with the weight of the presser plate by letting it slacken, or to lift the presser plate by hand while holding the paper. The idea of interlocking is what produces an extremely unusual effect for a conventional transmission system such as opening the presser plate11]8.

After explaining the related parts, the main topic is L, in which a flexible guided structure is fitted with a large number of guides to a rigid reference structure.
Returning to the explanation of the structure in which the structure is overly constrained and uses the flexure of the flexible structure to adjust, this structure is used as a guide structure to determine the relative positional relationship between units in a printing device. Moyoi Principle 111 is that although relative positional accuracy is certainly necessary in printing devices, it is only really necessary during printing, and essentially one of the opposing relationships during printing is
"Reproducibility" is necessary, and as long as this can be ensured, relative positional accuracy is not a concern in cases such as when paper exchange is performed with wide intervals. In addition, the fact that the unit can be removed in the open state by operating a lever greatly improves maintainability4), but it is also possible to set the unit in the opposite position for printing both during printing and during transportation. If you do so, there will be no real harm at all since you are limitedly restrained in this state.

In addition, four guides are used to constrain the four points, and in the printing interval, lateral constraint is used by positioning and fitting.As long as torsion within the elastic region is allowed, even if the four points are constrained, the relationship between the relative positions will not change. focuses on the fact that it can be realistically reproduced.
There is an excessively large offset (vertical position difference) between the printing hammer position and the guide in the vertical direction (paper movement direction).
This method focuses on the fact that if the stay 20 is not used, even if it is slightly twisted due to being guided, it will only result in a very small difference in the impact angle between the type and the hammer. In addition to ensuring the relative position and relative rigidity, the unit structure itself does not need to be rigid as long as it does not undergo plastic deformation, so the structure is such that the side plates 17 are attached to the end faces 20a and 20a' of the stays as shown in this example. Only by positioning and screwing 17', paper feeding can be accomplished with an extremely simple structure that requires only adjusting the sprocket shaft and providing a guide.

FIG. 11 and FIG. 12 are explanatory diagrams of another embodiment.
1J7 on the side plate of the guided structure 32 with Yj of 1.31'
j:L position floors 31a, 31a' and engaging parts 31b, 31
1) Add mounting screw holes 30a and 30a to the stay,
The separated paper feeding unit 33 is provided with a portion 24a facing the position floor of the side plate end and the position floor of the stay, and an engaged surface 33a' that engages with the engaging portion described in -4-. The surface stay can be mounted by forming holes 33b and 33b' at positions facing the two screw holes in the part facing the floor, engaging the engaging part and the engaged part, and tightening the screws. .34'
Since the unit 1 is removed, each unit group 1 is formed, but as a result, each unit 1~ can be separated into pieces as shown in Fig. 12, and the front side of the magnet becomes the maintenance side except for both sides, making maintenance extremely easy.

In addition, if we go with the conventional idea that the position of the 11L path and the printing hammer can be adjusted, the rigidity of Uniso 1~ that houses the magnet, especially the rigidity against torsion in the girder direction axis and shearing force in the vertical and longitudinal directions. Although this would be impossible since the structure of the present invention is limited and constrained, it would be better to be able to deform elastically as a single unit without plastic deformation. This is actually preferable for restraining the body, so adopting such a structure has only advantages without any particular disadvantages.As explained below, according to the present invention, functional parts that originally require rigidity are placed on the reference side. If the structure does not necessarily require the rigidity of the special mode as a single unit, but requires the relative positional relationship with the functional part on the reference side and the relative rigidity in the positioned state, a flexible structure unit and 4. By creating an overlimited structure with a constraint guide, it is possible to achieve reproducibility of the relative position during printing and relative rigidity by actively elastically deforming it and making it move toward the reference side, so it is not too rigid to separate into unit structures. Since it can be realized very easily without worrying about the problems, even if the separation is performed, the cost is not affected and maintenance and operability are improved, and the overall size can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the conventional configuration, and Figures 3 to 12
FIG. 3 is a detailed explanatory diagram of the present invention. FIGS. 4 and 5 illustrate the layout configuration. Fig. 6 is a partial view showing an enlarged view of the relative positioning pin and the fitting part, Fig. 7 is an explanatory diagram of the operation lever, cam, and follower correspondence, and Fig. 8 is an enlarged view of the relative positioning pin and the fitting part.
9 and 9 are explanatory diagrams of a printing interval adjustment mechanism section, FIG. 10 is an explanatory diagram of a presser plate opening/closing interlocking structure using wires, and FIGS. 11 and 12 are explanatory diagrams of another layout configuration. Part 4■ NELO Posting No. 12

Claims (1)

[Scope of Claims] (1) It has an upper plane on the front side and parallel both sides formed perpendicularly to the upper plane and extending from the front side to the back side, and a type running means on the two planes. and a heath structure section having a pair of guide means on the front and rear sides of both sides, and a guided structure section consisting of a stay and a pair of side plates attached to parallel end surfaces of the stay. A printing device characterized in that a guided structure is formed on each of the two side plates to fit vertically with each guide of the guide means, and the guided structure is installed and guided in the heath structure. structure. 2)] The cam means 1 is provided with cam followers on both side plates of the cam means 1 on both sides of the base structure, and the relative position of the L 1111 in the rear direction is determined for engagement between the cam means and the cam followers. A structure of a printing device according to claim 1. 3) ``The side where the relative position is close to both side plates of the structure part (1'l cD, IJ) has a cam follower on the side where the relative position is away from the IJ muffler, and the side where the relative position is brought closer by operation of the above cam means. Claim 2, characterized in that it has a retaining part that allows the guide structure to be operated toward the opening side and performs relative positioning of the guide structure and the guided structure in the left-right direction at a position on the approaching side. Structure of the printing device. 4) When the guided structure is in the open side position, the lower front part of the guided structure is cut out to form an opening through which each guide can pass, so that the guided structure can be removed. A structure of a printing device according to claim 3. A paper feeding unit having an engaging portion and a position floor and a portion facing the upper end surface of the stay is engaged with the engaging portion and the engaged portion, and is screwed to the upper end surface of the stay. A structure of a printing device according to claim 1.