JPH0621941U - Platen device for printer - Google Patents

Abstract

(57) [Summary] [Purpose] Attach the platen easily and without rattling. An elastic piece 10 is attached to one end of the platen 2, and an elastic bush 11 as an elastic body is attached to the other end of the platen 2, and the printer frame is provided at both ends via the elastic piece 10 and the elastic bush 11. 12 are engaged and supported. The printer frame 12 has a holding groove 12 a into which one end of the platen 2 is engaged via the elastic piece 10.
Is formed, and the other end of the platen 2 is formed with a positioning pin 12b that engages with the elastic bush 11 via the elastic bush 11. The platen 2 is engaged and supported in the holding groove 12a and the positioning pin 12b at both ends without rattling. Has been done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a platen device used in a printer.

[0002]

[Prior art]

 A long plate-shaped platen is fixed to the printer so as to face the print head, and recording paper is fed between the print head and the platen by a paper feed roller or the like for printing. (Japanese Patent Laid-Open No. 4-99670).

In this type of printer, the platen is attached to the printer frame via a fastening member such as a screw without rattling.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional structure, it is necessary to tighten the fastening member when mounting the platen, and there is a problem that it takes time to mount the platen.

An object of the present invention is to provide a platen device for a printer, which can easily attach a platen to an attachment member such as a printer frame without rattling.

[0006]

[Means for Solving the Problems]

 The printer platen device according to the present invention has a long plate-shaped platen and a mounting member to which the platen is mounted. One end of the platen is attached to the mounting member via an elastic body from the longitudinal direction. A holding portion to be engaged and a positioning portion to which the other end portion of the platen is engaged with the holding portion via the elastic body in a direction orthogonal to the longitudinal direction when the platen is engaged with the holding portion are provided. The platen is engaged with and supported by the end portion and the positioning portion at both ends.

[0007]

[Action]

 According to the present invention, by simply engaging one end of the platen with the holding portion of the mounting member via the elastic body and engaging the other end of the platen with the positioning portion of the mounting member via the elastic body, The platen can be attached to the attaching member, and the elastic body prevents the platen from rattling in the attached state of the platen.

[0008]

【Example】

An impact printer to which the printer platen device according to the present invention is applied will be described with reference to the drawings. In this printer, as shown in FIG. 1, a platen 2 is fixedly installed so as to face the nose portion 1a of the print head 1, and the recording paper 3 is not shown between the nose portion 1a of the print head 1 and the platen 2. It is designed to be fed by a conveying means and used for printing.

The print head 1 is supported movably in a direction orthogonal to the paper feed direction via guide shafts 4 and 5, and is moved in a direction orthogonal to the paper feed direction during printing. The print head 1 is of an impact type, and a printing element (not shown) collides with a platen 2 via an ink ribbon (not shown) and the recording paper 3 at the time of printing so that the recording paper 3 is printed by this operation. Has become.

As shown in FIG. 2, the platen 2 is provided with a long plate-shaped platen main body 6 extending along the moving direction of the print head 1, and the printing head is provided on one surface 6 a of the platen main body 6. Nose portion 1a of No. 1 is opposed. A reinforcing member 7 is bonded and fixed to an outer peripheral surface of the platen body 6 excluding a front surface 6 a facing the print head 1 with an adhesive 8 and is reinforced by the reinforcing member 7. The reinforcing member 7 is formed in a U-shaped cross section, and the back surface 6b of the platen body 6 is joined and fixed to the base plate portion 7a, and each side surface 6c of the platen body 6 is joined and fixed to each leg plate portion 7b. The reinforcing member 7 is formed to be longer than the platen body 6, the platen body 6 is fixed to the middle portion, and both ends are projected from both ends of the platen body 6.

An elastic piece 10 as an elastic body is attached to one end of the platen 2 and an elastic bush 11 as an elastic body is attached to the other end of the platen 2, and the elastic piece 10 and the elastic bush 11 are interposed therebetween. Are engaged and supported by the printer frame 12 at both ends.

The elastic piece 10 is fixed to one end of the base plate portion 7 a of the reinforcing member 7 by an adhesive means (not shown) and is gradually thinned toward one end of the reinforcing member 7. The elastic bush 11 is inserted and fixed in a mounting hole 7c formed in the other end of the base plate portion 7a of the reinforcing member 7 by an adhesive means (not shown), and an engaging hole 11a is formed in the central portion.

In the printer frame 12, one end of the base plate portion 7 a of the reinforcing member 7 is inserted together with the elastic piece 10 so that one end of the platen 2 is engaged via the elastic piece 10 as a holding groove 12 a as a holding portion. Is formed, and a positioning pin 12b is formed as a positioning portion that is inserted into and engaged with the engaging hole 11a of the elastic bush 11 and the other end of the platen 2 is engaged with the elastic bush 11 via the elastic pin 11. The platen 2 is engaged and supported at both ends by the groove 12a and the positioning pin 12b.

One end of the base plate portion 7a of the reinforcing member 7 is inserted and engaged in the holding groove 12a together with the elastic piece 10 in the longitudinal direction. When one end of the base plate portion 7a of the reinforcing member 7 is engaged with the holding groove 12a, the upper wall 12c and the lower wall 12d forming the holding groove 12a prevent the platen 2 from being detached in the vertical direction of FIG. At the same time, the upper wall 12c is positioned between the leg plates 7b of the reinforcing member 7 to prevent the platen 2 from separating in the direction perpendicular to the plane of FIG. Further, the elastic piece 10 is interposed between the one end of the base plate portion 7a of the reinforcing member 7 and the upper wall 12c of the holding groove 12a, and the elastic piece 10 prevents the one end of the platen 2 from rattling and is elastic. The deformation of the piece 10 allows the swinging displacement of the platen 2 in the arrow B direction.

The positioning pin 12b swings and displaces the platen 2 in the direction of the arrow B in a state where one end of the base plate portion 7a of the reinforcing member 7 is engaged with the holding groove 12a, so that the engaging hole 11a of the elastic bush 11 is inserted into the positioning pin 12b. It is adapted to be inserted and engaged. When the positioning pin 12b is engaged with the engaging hole 11a of the elastic bush 11, the other end of the platen 2 is positioned by the positioning pin 12b in the direction perpendicular to the plane of FIG. 2 and the longitudinal direction. There is. An elastic bush 11 is interposed between the positioning pin 12b and the other end of the base plate portion 7a of the reinforcing member 7, and the elastic bush 11 prevents the other end of the platen 2 from rattling. .

According to the above configuration, one end of the platen 2 is inserted into and engaged with the holding groove 12a of the printer frame 12 from the longitudinal direction via the elastic piece 10, and then the platen 2 is oscillated and displaced in the arrow B direction. When the other end of the platen 2 is engaged with the positioning pin 12b of the printer frame 12 via the elastic bush 11, the platen 2 is engaged with and supported by the printer frame 12 at both ends, whereby the printer frame 2 is supported. Platen 2 is attached to 12. Further, in the mounted state of the platen 2, the elastic piece 10 and the elastic bush 11 prevent the platen 2 from rattling.

As described above, in this embodiment, the holding groove 12a and the positioning pin 12b are formed in the printer frame 12, and the platen 2 is attached to the holding groove 12a and the positioning pin 12b at both ends thereof. Since the platen 2 is engaged and supported through the platen 2, the platen 2 can be easily attached without rattling and without using a conventional fastening member, and the workability of attaching the platen 2 is improved.

Although the platen 2 is composed of the platen body 6 and the reinforcing member 7 in the above-described embodiment, the reinforcing member 7 is omitted and the tongue pieces are integrally formed at both ends of the platen body 6. The elastic piece 10 may be attached to one side and the elastic bush 11 may be attached to the other side so that the platen body 6 is directly engaged with and supported by the holding groove 12a and the positioning pin 12b of the printer frame 12 at both ends.

In the above embodiment, the elastic piece 10 and the elastic bush 11 are attached to the platen 2 and the holding groove 12a and the positioning pin 12b are formed in the printer frame 12. However, one end of the platen 2 is made of an elastic material. The platen 2 may be engaged with the printer frame 12 via the elastic member, and the other end of the platen 2 may be engaged with the printer frame 12 via the elastic body. For example, the elastic piece 10 is attached to the holding groove 12a of the printer frame 12. At the same time, the elastic bush 11 may be attached to the positioning pin 12b of the printer frame 12. Further, a bottomed engagement hole is formed at one end of the platen 2 and a holding projection is formed in the printer frame 12 to engage with the engagement hole through an elastic body, and the other end of the platen 2 is formed. Alternatively, a pin may be provided so as to protrude from the portion, and a positioning hole that engages with the pin may be formed in the printer frame 12 via an elastic body. Further, the elastic body is not limited to the elastic piece 10 and the elastic bush 11, and elastic bodies of various shapes can be applied.

Further, although the platen 2 is attached to the printer frame 12 in the above-described embodiment, it is of course applicable to a case where the platen 2 is attached to another attachment member.

[0021]

[Effect of device]

 As described above, according to the platen device for a printer of the present invention, the mounting member is provided with the holding portion and the positioning portion, and the holding portion and the positioning portion are engaged with the platen at both ends via the elastic body. Since it is supported, the platen can be easily attached without rattling, and the workability of attaching the platen is improved, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a printer to which a printer platen device according to the present invention is applied.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 2 platen 10 elastic piece (elastic body) 11 elastic bush (elastic body) 12 printer frame (mounting member) 12a holding groove (holding portion) 12b positioning pin (positioning portion)

Claims (2)

[Scope of utility model registration request] 1. A holding member having a long plate-shaped platen and a mounting member to which the platen is mounted, wherein one end of the platen is engaged with the mounting member in the longitudinal direction via an elastic body. And a positioning portion with which the other end of the platen is engaged via an elastic body in a direction orthogonal to the longitudinal direction when the platen is engaged with the holding part. A platen device for a printer, wherein the platen is engaged with and supported by a positioning part at both ends. 2. The platen according to claim 1, wherein the platen includes a platen body having an elongated plate shape, and a reinforcing member joined and fixed to an outer peripheral surface of the platen body, which faces the print head, except a front surface thereof. A platen device for a printer, wherein one end of the reinforcing member is engaged with the holding portion, and the other end of the reinforcing member is engaged with the positioning portion.