JP4658697B2 - Frame structure for printer device - Google Patents

Description

The present invention relates to a printer device suitable for use in various devices for recording characters, symbols, and the like on paper, and more specifically, a frame body through which a base portion constituting a platen and a guide shaft of a printer head portion are inserted. The present invention relates to a frame mounting structure for a printer device that is devised so that it can be assembled easily and accurately.

Regarding the frame mounting structure of the printer device , for example, the “small printer frame” described in Patent Document 1, the “printer chassis” described in Patent Document 2, and the conventional examples of FIGS. There is something like this.

  The “small printer frame” described in Patent Document 1 includes a box-shaped receiving portion provided in a basic plastic frame, and a metal frame provided with various shaft holes in the receiving portion is inserted and fixed. It is configured so that various shafts such as a drum shaft and a hammer shaft can be attached using the shaft hole, and the "printer chassis" described in Patent Document 2 is provided with a square hole in the bottom frame, The frame leg is again inserted into the square hole and is slid to fix the attachment.

Further, in the conventional example shown in FIGS. 9 and 10, reference numeral 101 denotes a base plate that also serves as a platen, 106 and 106 denote left and right frames attached to both sides of the base plate 101, and 102 and 105 denote the frames 106 and 106. A printer guide shaft and cam shaft laid between them, 100 and 100A are a printer and an ink ribbon case. The printer 100 is attached to the guide shaft 102 by a cylindrical cam 104 provided on the cam shaft 105 rotated by a drive motor 107. The left and right frames 106 are fixed by inserting leg portions 106T into square holes 101A provided in the base plate 101 and caulking them as shown in FIG. It is structured.
Japanese Utility Model Publication No. 63-201755 Japanese Utility Model Publication 4-128858

  However, in the configuration described in Patent Document 1, the structure of the basic plastic frame is complicated and the flatness of the bottom is difficult to be obtained, so that the parallelism between the various shafts inserted into the shaft holes provided in the left and right frames is attached. There is a problem that it is difficult to maintain the degree, and in the configuration described in Patent Document 2, the left and right sides of the side frame that is attached by sliding the leg portion into the square hole provided in the bottom frame and sliding are left and right. In order to prevent this, it is necessary to increase the thickness of the side frame. As the side frame is increased, there is a problem that the cost is increased and the size of the apparatus is increased.

  Further, in the conventional example shown in FIGS. 9 and 10, since the left and right frames 106 are fixed to the base plate 101 by caulking, distortion occurs during caulking, and the base plate 101 and the left and right frames 106, 106, it is difficult to achieve parallelism between the printer guide shaft 102 and the cam shaft 105 installed between them, or caulking requires a large caulking device. Therefore, once this caulking device is installed, the assembly line of the printer There was a problem that changes could not be easily handled.

The present invention has been developed to solve the above-described problems of the prior art, and the technical problem is that a base body serving also as a platen and a frame body on which a moving guide shaft of a printer head section is installed. It is possible to provide a frame mounting structure for a printer apparatus that can improve the assembly accuracy of the printer apparatus , can maintain the accuracy, and can be easily assembled.

(1) In order to solve the above technical problems, a frame mounting structure of the printer apparatus according to claim 1 of the present invention, there is provided a printer device for printing characters and symbols on the paper, for printing Provided in the base part to insert a base part also serving as a platen, a pair of frame bodies provided with holes through which both ends of the guide shaft for moving the printer head part are inserted, and legs provided in each frame body And a frame attachment member provided with a frame attachment portion that can be attached to the base portion and can be attached in a state of being pressed so as to cover a part of each frame body from the outside. made, each leg of the pair of frame members mounted on both ends of the print head unit moving the guide shaft is inserted into the square hole of the base portion, and said frame attached to the base portion By frame mounting portion of the over arm attachment member presses so as to cover a part of the respective frame bodies, to fix the mounting state of the respective frame bodies with respect to the base portion, said between said two frame bodies The printer head unit moving guide shaft is configured to be erected.

(2) frame mounting structure of the printer apparatus according to claim 2 of the present invention, the frame mounting section of the frame mounting member for pressing a portion of said frame body, a groove portion for fitting a portion of the frame member When, said the protruding portion formed with a slightly narrower interval than the thickness of the frame member is provided on the inner side of the groove, at the time of installation of the frame body, fitted a portion of the frame body to the groove, and it is characterized by being configured so as to force-fit the frame of the by narrowing cutting deformation or of the protruding portions.

(3) frame mounting structure of the printer apparatus according to claim 3 of the present invention, the inside of the groove provided in the frame mounting section of the frame mounting member, sandwiching the frame body from both sides, the frame member It is characterized in that a pressing guide portion is provided to suppress the shaking in at least one of the left-right direction and the front-back direction.

(4) In the frame mounting structure of the printer device according to claim 4 of the present invention, frame mounting portions are provided on the left and right sides of the frame mounting member, and a printer head is provided between the left and right frame mounting portions. A printer guide unit is provided that engages the unit and guides its movement.

(5) The frame mounting structure of the printer device according to claim 5 of the present invention is provided with a groove portion for fitting the upper end portion of the frame body in a ceiling portion of the frame mounting portion provided in the frame mounting member. A screw hole cylindrical body for a tightening screw is provided in the central portion of the inside of the groove so as to be aligned with a hole for a guide shaft provided in the frame body , while a lower end portion of the frame body is provided. said leg portions projecting from the, in the groove on both sides by the screw hole cylindrical body in the center, provided with the projecting portion and the pressing guide portions each pair each, the upper end of the frame body, the a recess screw hole cylinder is fitted, provided with a left and right guide projecting pieces are respectively sandwiched projection and the pressing guide portion of the sides on both sides of this recess, screwed into the screw hole cylinder By tightening the screw , The screw tip presses the recess portion of the frame body, in a state where the leg portions protruding from the lower end of the whole of the frame body and inserted into the square hole of the base portion, and the frame mounting section It is characterized by being configured to sandwich fixed from above and below between the base portion.

Frame mounting structure of the printer apparatus according to claim 6 (6) The present invention further make the frame body of metal, that the whole of the frame mounting member including a front frame mounting portion is so made of plastic It is a feature.

According to the means according to claim 1 described in the above (1), the frame body for attaching the both ends of the guide shaft for guiding the movement of the printer head part to the base part also serving as the platen, and the leg part of the frame part The frame mounting portion can be fixed to the base portion side in a state of being inserted into a positioning square hole provided on the base plate and pressed so as to cover a part of the frame body from the outside. As a result, the assembly accuracy and dimensional accuracy between the platen (base portion) and the printer head portion moving guide shaft can be increased, and the frame body can be firmly fixed without being tilted. Moreover, since it is possible to easily perform the mounting and removal of the print head unit at only drivers working in the assembly line, it makes it possible to perform mounting operation of the printer head without using a large-scale crimping device.

According to the means according to claims 2 and 3 described in the above (2) and (3), when the frame body is attached to the base portion by the frame attachment portion, the protrusion provided in the groove portion of the frame attachment portion is In order to hold the frame body in a state in which it is deformed or scraped thinly by a part of the inserted frame body, and to hold the frame body in a state in which the pressing guide portion provided in the groove suppresses shaking, the frame body is used as a base. It is possible to securely maintain the parallelism between the guide shaft for moving the printer head portion attached by the frame body and the base portion.

According to the means according to claim 4 described in (4) above, since the left and right frame bodies can be attached simultaneously by the frame attachment portions provided on the left and right sides of the frame attachment member, the printer head portion moving guide shaft easily, and, it is possible to attach to the base portion in a stable condition, the guide portion of the printer head portion provided between both the frame mounting portion, to guide the printer head which moves along the guide shaft Therefore, it is possible to provide high-quality printing by stabilizing the movement of the printer head , and it is possible to maintain structural strength and printing stability with a small number of parts.

According to the means according to claim 5 described in the above (5), the left and right frame bodies can be accurately and firmly attached to the base portion only by the tightening operation of the tightening screw. Since the parallelism of the guide shaft with respect to the base can also be adjusted by tightening the tightening screw, for example, the work of removing the frame body for repair of the printer device , the reassembly work after removal, the parallelism The adjustment work can be performed very easily, and even if the frame body is loosely attached to the frame mounting part, it can be sufficiently fixed by tightening the tightening screws. Enable.

According to the measures according to claim 6 described in the above (6), hole frame body made of metal, the frame mounting member side for mounting the this order are granulated be plastic, inserting the printer movement guide shaft The dimensional accuracy of the part can be maintained for a long time, and the elasticity of the frame mounting part made of plastic can easily fix the metal frame body. Also, the frame mounting member (frame mounting part) with a complicated shape can be It can be easily molded by plastic molding.

As described above, according to the frame mounting structure of the printer device according to the present invention, the frame body for mounting the guide shaft for moving the printer head unit is very simple and accurate with respect to the base unit also serving as the platen. Can maintain the parallelism between the guide shaft and the base portion, can increase the dimensional accuracy between the base portion and the guide shaft, and can firmly fix the frame body. The printer head can be operated smoothly without any trouble, and high-quality printing can be provided. Furthermore, according to the present invention, since there is no need for a large caulking device or the like, it is possible to exhibit the advantage that each operation of construction and change of the assembly line for the printer device can be easily performed. It is very useful when applied to printer devices of various other printing machines.

The embodiment of the frame mounting structure of the printer apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the entire printer apparatus 1 in which the present invention is implemented, and FIG. perspective view showing a disassembled whole frame mounting member 2 constituting the 1, in Figure 3 the frame merely indicate a bottom view of the mounting member 2, which like Figure 1 and the respective code 1 in FIG. 2 overall generically indicated printer apparatus, the frame attachment member shown in the above code 2, and is constituted by a base portion serving as a platen shown in the above code 3.

The base part 3 formed by pressing a metal plate has square holes 3B and 3B for attaching a frame body, which will be described later, to the left and right sides 3Z and 3Z, and the frame attaching member. 2 have mounting screw 5K ... for holes 3A ... is provided with a plurality of for securing the upper surface of the base portion 3, a flat surface which is formed in the figures good front side, the printing platen of the printer head which will be described later It is comprised so that.

  As shown in the drawing, the above-mentioned frame mounting member 2 is formed in a substantially portal shape with the side members 2 'and 2' provided on both sides of the base 2X using plastic as a whole. These two side members 2 ′ and 2 ′ are integrally connected to the front surface side (front side) of the frame mounting portions 10 and 10 in a state where they are opposed to each other. A reinforcing rib 11 is provided between the front end portions. Further, a plurality of nut portions 2A, into which the mounting screws 5K are screwed, are provided at the front end portion and the intermediate portion of each side member 2 ', and the tightening of these mounting screws 5K is shown in FIG. In this way, the frame mounting member 2 is fixed to the upper surface of the base portion 3.

1, 4 printer head, print ribbon cassette 4R is mounted to the printer head 4, 5 printer head movement guide shaft which is rotatably mounted moving the printer head unit 4, 6 motors (see FIG. 9 ) the printer head 4 is rotated by the cylindrical cam shaft to be printed moves laterally by which such guide shaft 5 and the cylindrical cam shaft 6 has its both end portions 5T and 6Z both sides 3Z of the base portion 3, 3Z By supporting the left and right frame bodies 7 and 7 attached to the left and right frames in a rotatable manner, the parallelism between the shafts 5 and 6 and the base portion 3 is maintained.

4 is an enlarged bottom view showing the configuration of the frame mounting portion 10 indicated by the symbol W in FIG. 3, and FIGS. 5, 6, and 7 are taken along lines AA and B- in FIG. FIGS. 8A and 8B are enlarged cross-sectional views taken along lines B and C-C, respectively, and FIG. 8 is a side cross-sectional view showing a mounting state of the frame body 7 by the frame mounting portion 10. The frame body 7 to be molded is formed with holes 7A and 7H for rotatably mounting the above-mentioned printer head portion moving guide shaft 5 and the tip portions 5T and 6Z of the cylindrical cam shaft 6, respectively. As shown in FIG. 8, at the lower end portion, the leg portions 7B and 7B inserted into the square holes 3B and 3B of the base portion 3 described above, and the insertion of the leg portions 7B and 7B into the square holes 3B and 3B can be determined. Stoppers 7X and 7X are provided for stopping at a certain position.

  Furthermore, one side (front side half) of the upper end portion of the frame body 7 is provided with a concave portion 7C in the center portion aligned with the guide shaft hole portion 7A as seen in FIGS. Guide protrusions 7D and 7D are provided so as to protrude upward on both the left and right sides. The frame mounting portion 10 is based on the frame body 7 using these recesses 7C and the guide protrusions 7D and 7D. Although it is configured to be fixedly mounted on both sides 3Z of the portion 3, the configuration of the frame mounting portion 10 will be described in detail based on the description of the drawings (particularly FIGS. 4 to 8).

  The entire frame mounting portion 10 integrally formed with the side member 2 'of the frame mounting member 2 covers the frame body 7 from above and can be pressed against the base portion 3 to be fixed. The groove is formed in a shape in which the concave groove 10H is recessed downward in half. Reference numeral 10K denotes a presser plate which is arranged side by side with a space between the front and back so that the concave groove 10H is recessed inside. It is structured to be pressed from above.

  In the figure, 10T is a screw hole rectangular tube projecting downward in the center of the concave groove 10H, 10A is a screw hole for a tightening screw 8 provided inside the screw hole rectangular tube 10T, Reference numeral 20 denotes a pressing guide portion projecting guide portions 22 and 22 (see FIG. 5) on the inner side surface of the concave groove 10H, and reference numeral 30 denotes projections 32 and 32 on the inner side surface of the concave groove 10H (see FIG. 6). ), And the pressing guide portion 20 and the protruding portion 30 are arranged on the left and right sides of the screw hole rectangular tube body 10T as seen in FIGS. A pair is provided on both sides.

In order to mount the printer head portion moving guide shaft 5 and the cylindrical cam shaft 6 in parallel to the base portion 3 using the frame mounting portion 10 of the frame mounting member 2 configured as described above and the frame body 7, first, The frame bodies 7 and 7 are attached to both end portions 5T and 6Z of the shafts 5 and 6, and the leg portions 7B provided at the lower ends of the frame bodies 7 and 7 are inserted into the square holes 3B of the base portion 3.

  Next, the guide protrusions 7D and 7D projecting from the upper ends of the both frame bodies 7 and 7 are fitted into the recessed groove 10H of the frame mounting portion 10, and the frame is mounted in the recess 7C between the both guide protrusions 7D and 7D. In the state where the screw hole square tube 10T on the portion 10 side is fitted, the mounting screws 5K are screwed into the nut portions 2A on the frame mounting member 2 through the screw holes 3A on the base portion 3 and tightened. The frame mounting member 2 can be fixed to the upper surface of the base portion 3 in a state where the left and right frame mounting portions 10 and 10 cover and press the left and right frame bodies 7 and 7 from above.

When the guide protrusions 7D and 7D of each frame body 7 are fitted into the groove 10H of the frame mounting part 10 by tightening the mounting screws 5K, the guide protrusions 7D and 7D are respectively pressed in the groove 10H. It is press-fitted into the fitting groove 21 (see FIG. 5) between the guide portions 22 and 22 constituting the guide portion 20, and the play of the frame body 7 in the left-right direction (the movement direction of the printer head portion 4) is suppressed. On the other hand, the protrusions 32 and 32 are further deformed into the fitting groove 31 (see FIG. 6) between the protrusions 32 and 32 constituting the protrusion 30 provided in the groove 10H by the guide protrusions 7D and 7D. Alternatively, the frame body 7 can be securely fitted and fixed by being pressed in while cutting.

Next, as shown in FIG. 8, when the tightening screw 8 is screwed into the screw hole rectangular tube 10T and tightened, the screw tip 8K presses the bottom surface of the recess 7C, and the hole 7A is pressed against the frame body 7. , That is, the direction of the printer head portion moving guide shaft 5 inserted in the hole 7A, the pressing force acts on the base portion 3 to make the attachment of the frame body 7 to the base portion 3 stronger. 3 (platen) and the guide shaft 5 (printer 4) can be maintained in parallel with each other, and the tightening operation of the tightening screw 8 allows the parallelism between the guide shaft 5 and the base portion 3 to be maintained. Makes it possible to adjust.

When the left and right frame bodies 7 and 7 are fixed to both sides 3Z and 3Z of the base portion 3 by the above procedure, the printer head portion moving guide shaft 5 and the hole portions 7A and 7H of the both frame bodies 7 and 7 a cylindrical cam shaft 6 with inserted and fitted, if attached printer head portion 4 with respect to the guide shaft 5 to be inserted, can be assembled printer device 1, both the frame body relative to the base portion 3 7,7 The attachment may be performed in a state where the shafts 5 and 6 are inserted and fitted into the both frame bodies 7 and 7, and the selection thereof is arbitrary.

  When disassembling the printer apparatus 1 assembled as described above, all the members can be brought into the disassembled state shown in FIG. 2 only by removing the mounting screws 5K and the fastening screws 8. All the assembly and disassembly of the printer apparatus 1 can be performed only by the driver work.

1 to 3, 2G indicates a guide portion of the printer head portion provided on the front surface portion of the frame mounting member 2 in order to guide the movement of the printer head portion 4. 5 indicates the minimum dimension into which the frame body 7 can be inserted. In FIG. 6, the distance Y is defined by the protrusions 32 and 32 made slightly narrower than the plate thickness of the frame body 7. The dimension between is shown. Furthermore, the space | interval shown with the code | symbol Z in FIG. 7 shows the external dimension of the screw hole square cylinder 10T which can be inserted in the recessed part 7C of the said frame body 7. FIG.

1 is a perspective view showing an entire printer apparatus in which a frame mounting structure of a printer apparatus according to the present invention is implemented. The perspective view which decomposed | disassembled and showed the whole frame attachment structure shown in FIG. The bottom view which showed the principal part of this invention. The bottom view which expanded the W view part of FIG. The expanded sectional view along the AA line of FIG. The expanded sectional view along the BB line of FIG. The expanded sectional view along the CC line of FIG. The sectional side view which expanded and showed the principal part of this invention. The top view of a prior art example. Side sectional drawing of a prior art example.

DESCRIPTION OF SYMBOLS 1 Printer apparatus 2 Frame attachment member 2G Guide part of printer head part 3 Base part which also serves as a platen 3B Square hole 4 Printer head part 4R Print ribbon cassette 5 Guide shaft for printer head part movement 5T Tip part of guide shaft 5K Attachment screw 6 Cylinder Cam shaft 6Z Cam shaft tip 7 Frame body 7A Guide shaft hole 7B Leg 7C Recess 7D Guide protrusion 8 Clamping screw 8K Screw tip 10 Frame mounting portion 10H Groove 10T Screw hole square cylinder 20 Press guide 30 Protrusion

Claims (6)

A printer device for printing characters and symbols on paper,
A base that also serves as a platen for printing;
A pair of frame bodies provided with holes through which both end portions of the printer head moving guide shaft are inserted;
Square holes for positioning provided in the base part for inserting leg parts provided in each frame body,
A frame mounting member provided with a frame mounting portion that can be mounted to the base portion and can be mounted in a state of being pressed so as to cover a part of each frame body from the outside,
Each leg of the pair of frame members mounted on both ends of the print head unit moving the guide shaft is inserted into the square hole of the base portion, and the frame mounting section of the frame mounting member attached to the base portion by There pressing so as to cover a part of the respective frame bodies, to fix the mounting state of the respective frame bodies with respect to the base unit, the printer head unit movement guide shaft between the both frame bodies A frame mounting structure for a printer device , characterized in that it can be installed. The frame mounting portion of the frame mounting member for pressing a portion of said frame body includes a groove for fitting a portion of the frame body, slightly narrowed spacing than the thickness of the frame body on the inside of the groove in it and the formed protrusions are is provided, during installation of the frame body, fitted a portion of the frame body to the groove, and, fitted and fixed to the frame of the by narrowing cutting deformation or of the protruding portions The frame mounting structure for a printer device according to claim 1, wherein the frame mounting structure is configured as described above. Inside the groove provided in the frame mounting section of the frame mounting member, sandwiching the frame body from both sides, pressing guide part for preventing a lateral direction or longitudinal direction of at least sway to one of the frame bodies The frame mounting structure for a printer device according to claim 1, wherein the frame mounting structure is provided. Frame attachment portions are provided on the left and right sides of the frame attachment member, and a printer guide portion is provided between the left and right frame attachment portions to engage the printer head portion and guide its movement. The frame mounting structure for a printer device according to claim 1, 2, or 3. A groove portion for fitting the upper end portion of the frame body is provided in a ceiling portion of the frame attachment portion provided in the frame attachment member, and a guide shaft provided in the frame body is provided at an inner central portion of the groove portion. of while projecting the screw hole cylindrical body of screw tightening downward by aligning the holes, projecting legs of the the lower end of the frame member, and the screw hole cylindrical body in the center above the groove on both sides, together with the projecting portion and the pressing guide part respectively pair by providing, in the upper portion of the frame body, and a recess above the screw hole cylinder is fitted, on both sides of the recess the left and right guide projecting pieces are respectively pinched on both sides of the protrusion and the pressing guide portion is provided, by tightening the threaded he screwed into the screw hole cylinder fastening, screw tip presses the recess of the frame member Te, all of the frame body In a state where the leg portions protruding from the lower end portion is inserted into the square hole of the base part, characterized by being configured to sandwich fixed from above and below between the base portion and the frame mounting section 5. A frame mounting structure for a printer apparatus according to claim 1, 2, 3 or 4. Make the frame body with a metal, the entirety of the frame mounting member including a front frame mounting portion of the printer apparatus according to claim 1, 2, 3, 4 or 5, characterized in that as made of plastic Frame mounting structure.

Images