JPH0617548Y2 - Print head wire guide mounting jig - Google Patents

Description

Detailed Description of the Invention [Outline] A print head for attaching a wire guide having a plurality of guide holes for guiding each wire for printing provided in the head body of a print head for a wire dot printer to the head body. Regarding the wire guide mounting jig, each wire for printing provided on the head body of the print head for the wire dot printer is guided for the purpose of facilitating easy and accurate attachment of the wire guide to the head body. A jig base having a support portion for supporting a wire guide having a plurality of guide holes on a support surface, and the wire guide supported on the support surface so as to be correctly positioned and fixed to the head body. The jig base comprises positioning means for positioning the jig base with respect to the head body. A plurality of pins that fit into the respective guide holes of the wire guide are provided in a protruding manner.

[Industrial application field]

The present invention relates to a wire guide mounting jig of a print head for mounting a wire guide having a plurality of guide holes for guiding respective printing wires provided in the head body of a print head for a wire dot printer.

In the wire dot printer, by energizing a coil formed in a plate-shaped member elastically supported in the print head and arranged in a magnetic path (formed by a magnetic path forming means such as a magnet), There is a type in which a plate-shaped member is moved and printing is performed by a printing wire fixed to the plate-shaped member. In this case, a plurality of wires, that is, plate members, are provided in a predetermined arrangement. Each wire is made of ceramic or the like, and is guided by a guide hole of a wire guide attached to the head main body of the print head to be guided and moved.

The present invention is applied to the wire guide attachment of this kind of wire dot printer.

[Conventional technology]

Conventionally, this wire guide has been attached to the head body by positioning it in a groove formed in the head body and adhering it to the head body.
It is done by abutting the edges and adhering.

[Problems to be solved by the invention]

However, in the conventional wire guide mounting method as described above, it is difficult to position the guide hole of the wire guide in the apparatus, and particularly in the case of a multi-head, printing is disturbed unless the guide hole position of the adjacent head is set accurately. Therefore, when the print head is placed on the shuttle (or the carriage), adjustment that requires skill is required. For this reason, it has been attempted to form a positioning hole in the wire guide and also to perform positioning by forming a corresponding hole in the head main body to which the wire guide is attached. It was difficult to obtain the accuracy of the guide hole and the wire guide positioning hole, which was difficult.

An object of the present invention is to provide a wire guide attachment jig for a print head that can easily and accurately attach the wire guide to the head body.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a support for supporting a wire guide having a plurality of guide holes, which are provided on a head body of a print head for a wire dot printer, on a support surface. And a positioning means for positioning the jig base with respect to the head body so that the wire guide supported on the supporting surface can be correctly positioned and fixed to the head body. The support portion has a plurality of pins projectingly fitted into the guide holes of the wire guide.

[Action]

The wire guide is supported by the support part of the jig base by fitting the guide holes to the pins.
When the jig base is positioned on the head body by the positioning means, it is correctly positioned with respect to the head body.
If the wire guide is fixed to the head body in this state, the position of the guide hole in the device can be easily set. Further, in the case of the multi-head, the guide hole position of the adjacent head can be accurately obtained.

Further, if each pin is fixed to the support portion at a position lower than the support surface, even if there is an error in the arrangement of the guide holes, the pin will bend by this error when the wire guide is supported by the support portion. Therefore, it is possible to reliably perform the work of attaching the wire guide using this jig.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

Prior to the description of the wire guide mounting jig according to the present invention, the structure of the main part of the wire dot printer to which the present invention is applied will be described.

FIG. 5 is a perspective view showing the structure of the main part of the wire dot printer. In the figure, 1 is a platen, 2 is a shuttle, 3 is a hammer bank, 4 is paper, and 5 is a ribbon.

The shuttle 2 is guided by a guide bar 6 provided in parallel with the platen 1 and is movable in the arrow direction.

As shown in FIG. 6 which is a perspective view of the hammer bank portion of FIG. 5 as seen from the platen side, the hammer bank 3 is provided with shuttle frames 7, 7'integrated with the shuttle 2.
And a plurality of print heads 8 are attached thereto. As shown in detail in FIG. 7, the print head 8 is constructed by fixing a wire guide 11 to a head main body 10 provided with mounting flanges 9 and 9'by adhesion or the like. Although not shown in detail, the head main body 10 includes a plurality of sets of magnetic path forming means and a plate-shaped member as described above, and the plate-shaped member includes a coil and a printing wire. The wire guide 11 has a plurality of guide holes 12 for guiding the tip of each wire. Print head 8 having such a configuration
Is fixed to the shuttle frame 7, 7'by a screw 14 inserted into holes (dumb holes) 13 and 13 'of the flanges 9 and 9'. 9 is carried out by engaging a hole (oblong hole) 15 provided in 9 and a hole 15 ′ provided in the flange 9 ′ with a pin (not shown) on the shuttle frame side, and positioning in the Z direction is performed by the flange 9 ′. , 9'of the surfaces 9a, 9a 'and the shuttle frame 7, 7'.

Therefore, the wire guide 11 has holes 1 in the XY directions.
It is necessary that the position of the guide hole 12 is located on the basis of 5, 15 ', and the position of the guide surface 11a is located on the basis of the faces 9a, 9a' in the Z direction.

The present invention provides a wire guide mounting jig that can position the wire guide 11 easily and accurately. Next, the structure and operation of the jig will be described in detail.

FIG. 1 is an explanatory view of a wire guide mounting procedure by a wire guide mounting jig of a print head according to the present invention.
Is a jig base, and 102 is a positioning means.

The jig base 101 includes a supporting portion 103, and the supporting portion 10
As shown in FIG. 2, a plurality of holes 104 corresponding to the guide holes 12 are formed in the hole 3.
As shown in detail in the figure, the base of each pin 105 is fixed. This pin 105 is thinner than the guide hole 12 by an appropriate amount, and its base is fixed at a position lower than the supporting surface 103a of the supporting portion 103 by a. 10
6 is an adhesive for fixing the pin base. Further, the jig base 101 is provided with positioning pins 107, 107 'which are fitted in the holes 15, 15' of the head main body.

The positioning means 102 is the above-mentioned positioning pins 107, 1
07 ', screws 108, 108', and springs 109, 10
It is composed of 9 '. The under-neck size of the screws 108 and 108 'is b, and the threaded portions 110 and 110' are provided at the ends thereof.

The procedure for attaching the wire guide with the wire guide attaching jig having such a configuration is as follows.

When attaching the wire guide, first attach the wire guide 11 to the supporting portion 10 of the jig base 101 as shown in FIG.
3, the wire guide 11 is pushed in the direction of the arrow. As a result, the guide hole 12 fits into the pin 105 and the wire guide 11 is supported on the support surface 103a. In this case, if the diameter of the pin 105 is made smaller than that of the guide hole 12, it becomes too large for accurate positioning, and if the pin diameter is made substantially the same as that of the guide hole 12, an error may occur between the guide holes. I can only enter until. Therefore, as in this example, the pin fixing portion is attached to the support surface 103a.
If it is lowered by a, the pin 105 can bend,
The error between guide holes is not a problem, and all guide holes 1
The wire guide 11 can be positioned at an optimum position in consideration of the error of the position 2 and the positional relationship between the wire guide 11 and the positioning pins 107 and 107 'can be accurately obtained.

Next, as shown in FIG. 1, the adhesive 16 is applied to the wire guide mounting portion of the head main body 10 and the springs 109, 10
The head body 10 is opposed to the jig base 101 via 9 '. Then, in this state, screw the screws 108, 108 'into the hole 1
When the screw portions 110, 110 'are screwed into the screw holes 111, 111' of the jig base 101 and the screws 108, 108 'are tightened, the screws 108, 10' are inserted.
Since the under neck dimension b of 8'is properly set and the biasing force of the springs 109, 109 'which is compressed by tightening acts, the supporting surface 13a, that is, the surface of the wire guide 11 and the surface 9a of the flanges 9, 9'. , 9a ′ is determined so as to have a desired value. That is, the wire guide 1
The position of 1 in the Z direction is accurately determined. Further, at the time of this tightening, the holes 15, 15 'of the head body 10 are guided by the positioning pins 107, 107', so that the position of the wire guide 11 in the X and Y directions is also accurately determined. In addition,
As shown in FIG. 4, counterbore 112, 112 ′ is provided on the upper surface of jig base 101, and screws 108, 10 are provided at this portion.
It is advantageous in accuracy to lock 8 '.

After the adhesive 16 is hardened in this state, the head main body 10 is taken out from the jig base 101, and the wire guide attachment work is completed.

When the head body 10 is attached to the shuttle frame 7, 7 ', the head body 10 is positioned by engaging the holes 15, 15' with the corresponding pins. Since the positions of 11 in the X, Y, and Z directions are accurately shown, even in the case of a multi-head, it is only necessary to align the mounting reference positions of the heads (pin positions on the shuttle frame 7, 7'side) with other heads. The positions of the guide holes 12 can be aligned easily and accurately.

[Effect of device]

As described above, by using the wire guide mounting jig of the present invention, the position of the guide hole with respect to the mounting reference of the print head (the holes 15 and 15 'of the head body 10 in this embodiment) is optimally determined. Therefore, with the multi-head, you can easily and accurately align the positions of the guide holes with other heads simply by aligning the reference mounting positions of the heads, and no adjustments that require skill are required, improving print quality. To do.

Further, since the position of the surface of the wire guide can be accurately set, the relative position in the printing direction between the wire guide and the tip of the printing wire guided by the wire guide can be made constant, which is advantageous in printing quality. is there.

[Brief description of drawings]

FIG. 1 is an explanatory view of a wire guide mounting procedure by a wire guide mounting jig of a print head according to an embodiment of the present invention, and FIG. 2 is a detail of a jig base of a wire guide mounting jig of a print head according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing the details of the main parts of FIG. 2, FIG. 4 is a cross-sectional view showing another example of the structure of the portion A of FIG. 1, and FIG. FIG. 6 is a perspective view showing the main structure of the wire dot printer, FIG. 6 is a perspective view of the hammer bank portion of FIG. 5 seen from the platen side, and FIG. 7 is an enlarged perspective view of the print head of FIG. Inside, 8 is a print head, 10 is a head main body, 11 is a wire guide, 12 is a guide hole, 101 is a jig base, 102 is a positioning means, 103 is a supporting part, 103a is a supporting part, 105 is a pin, 107, 107 ′ Is a positioning pin, 108 and 108 ′ are screws 109, 109 'is a spring.

Claims (2)

[Scope of utility model registration request] 1. A support surface (103a) for a wire guide having a plurality of guide holes for guiding respective printing wires provided in a head main body of a print head for a wire dot printer.
A jig base (1) provided with a supporting portion (103) for supporting the above.
01) and positioning means for positioning the jig base (101) with respect to the head body so that the wire guide supported on the support surface (103a) can be correctly positioned and fixed to the head body. (102), and a plurality of pins (105) that fit into the respective guide holes of the wire guide are provided on the support portion (103) in a protruding manner. Ingredient 2. The base of each pin (105) has a support surface (103a).
The jig for fixing the wire guide of the print head according to claim (1), which is fixed to the support portion (103) at a lower position.