JPH0557976A - Sheet guide device - Google Patents

Abstract

PURPOSE:To provide a sheet guide device with a miniaturized and simplified sheet guide which can be manufactured easily. CONSTITUTION:The subject sheet guide device consists of hinge parts 14, which hold a pair of right and left sheet guides 4 in a freely rotatable and detachable manner, arranged on both ends of a sheet insertion slot 2 on the enclosure 1 of a printing device. A hinge part 14 where the sheet guide 4 is held in accordance with the width of the sheet is selected from among the hinge parts. If the device is not used, the sheet guide 4 is stored in the open surface which provides space although small for storage on the sheet insertion slot. In addition, the sheet guide 4 is compact and simple and subsequently, cost for manufacturing a molding die and for molding material is reduced. At the same time, the irregularity of size of the sheet guide 4 due to the impact of contraction percentage is minimized. Further, the sheet guide 4 can be easily attached to the hinge part 14 of the enclosure 1 without using any other parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet guide device used when inserting a sheet into a casing of a printing machine.

[0002]

2. Description of the Related Art As shown in FIG. 4, a sheet insertion port 2 is formed on the front surface of a casing 1 of a printing apparatus, and a bent piece 17 for guiding one side edge of a sheet 3 and another side edge of the sheet 3 are guided. Movable guide piece 1
A tray-shaped sheet guide 19 having 8 and 8 is provided in the sheet insertion port 2, and the sheet guide 19 is pulled out to bend the bending piece 1.
There is a paper guide device in which the paper 3 is inserted into the paper insertion opening 2 while positioning both side edges of the paper 3 by the movable guide piece 7 and the movable guide piece 18.

[0003]

The paper guide device shown in FIG. 4 accommodates the paper guide 19 deep into the paper insertion opening 2 when not in use, but since the paper guide 19 is large, the housing 1
In addition, the space for accommodating the paper guide 19 becomes large. Further, the paper guide 19 is generally formed by resin molding, but since the size is large, the dimensional variation is large due to the influence of the shrinkage ratio. By the way, if the width of the paper guide 19 is 600 mm, the dimensional variation due to the shrinkage ratio is 2 to
It reaches 3 mm. As a result, it is difficult to make the widths of the paper insertion opening 2 and the paper guide 19 equal, and it is difficult to smoothly take the paper guide 19 in and out. Moreover,
Since the movable guide piece 18 must be slidably assembled to the paper guide 19, and the material cost increases, there is a problem that the manufacturing cost increases.

[0004]

According to the present invention, there is provided a main body of a printing apparatus having a sheet insertion opening formed on an outer surface thereof, and a pair of left and right sheet guides for guiding both side edges of a sheet inserted through the sheet insertion opening. A fulcrum portion formed on the base of the paper guide positioned on an axis perpendicular to the paper inserted into the paper insertion opening, and on both sides of the paper insertion opening corresponding to a plurality of types of paper widths. A plurality of hinges are formed and each of the fulcrums of the paper guide is rotatably and detachably held.

[0005]

With the engagement of the fulcrum portion of the paper guide and the hinge portion provided in the paper insertion opening of the housing, the paper guide can be rotated with the rotation axis perpendicular to the paper. , When the paper guide is rotated in the opening direction, it can be inserted into the paper insertion port while guiding both sides of the paper by the pair of left and right paper guides, and the fulcrum of the paper guide can be inserted into the other hinge part of the housing. By engaging with, it is possible to guide sheets of different sizes by the same sheet guide. Furthermore, by rotating the paper guide in the closing direction when not in use, the paper guide can be stored in the opening surface of the paper insertion opening with a small storage space. Further, since the paper guide is formed as a single piece and has a small size, it is possible to reduce the manufacturing cost of the molding die and the molding material cost, and to reduce the variation in the size of the paper guide due to the influence of the shrinkage ratio. The guide can be easily attached to the hinge portion of the housing without using other parts.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. A laterally long sheet insertion port 2 is formed on the front surface of a casing 1 of the printing apparatus. The pair of left and right paper guides 4 provided on both sides of the paper insertion opening 2 have a guide surface 5 for guiding the side edges of the paper 3 and a guide surface 6 for guiding the lower surface of the paper 3. As shown in FIG. 2, a notch 7 having an opening at one end is formed at the base of the guide surface 5, and a projecting piece 8 that elastically bends is formed on the upper side of the notch 7, and also on the lower side of the notch 7. The protruding piece 9 is formed. Circular fulcrum parts 10 are formed by protrusions on the outer edges of the projecting pieces 8 and 9.
A small circular boss 11 is formed on the tip surface of the.
Further, a locking projection 12 is formed on the outer edge of the elastic upper protruding piece 8 to separate from the fulcrum 10.

A groove 13 for slidably holding the boss 11 is provided on the upper surface and the lower surface of the sheet insertion opening 2 on the inlet side.
Are formed along the width direction of the sheet 3. A plurality of concave hinge portions 14 are formed at both ends of the groove 13 so that the fulcrum portions 10 of the paper guides 4 are rotatably held with a rotation axis perpendicular to the paper 3. There is. These hinge portions 14 are arranged so as to correspond to the paper widths of different sizes. Further, a plurality of ribs 1 for supporting the paper 3 are provided on the lower surface of the housing 1 which is continuous with the paper insertion opening 2.
5 is formed. Further, as shown in FIG. 3, a plurality of locking recesses 16 for elastically locking the locking projections 12 are arranged on the upper surface of the sheet insertion slot 2 at positions corresponding to the hinges 14. Has been formed.

In such a structure, the fulcrum portion 10 of the paper guide 4 and the hinge portion 14 provided at the paper insertion opening 2 of the housing 1 are engaged with each other to rotate the paper guide 4 orthogonal to the paper 3. The paper guide 4 is rotated along the side edge of the paper 3 by rotating the paper with the moving shaft center in the opening direction to engage the locking projections 12 and the locking recesses 16 to fix both sides of the paper 3 to the left and right. It can be inserted into the paper insertion opening 2 while being guided by the pair of paper guides 4. Further, the projecting piece 8 of the paper guide 4 is elastically bent to engage the fulcrum portion 10 of the paper guide 4 with the other hinge portion 14 of the housing 1, and the locking projection 12 with the other locking concave portion 16. By fixing the sheet guide 4 along the side edge of the sheet 3 by engaging with the sheet guide 4, the sheet 3 having an arbitrary width can be guided by the sheet guide 4. At this time, by removing the fulcrum portion 10 of the paper guide 4 from the hinge portion 14 of the housing 1 and sliding the boss 11 along the groove 13,
The position of the paper guide 4 can be easily changed according to the paper 3 of different size.

When the sheet guide 4 is not used, the sheet guides 4 are pivoted in the closing direction around hinges 14 located at both ends of the sheet insertion port 2 as fulcrums, so that the sheet guide 4 can be opened with a small storage space. Can be stored on the surface. At this time, the paper guide 4 is maintained in the closed state due to friction between the upper and lower surfaces of the paper guide 4 and the upper and lower surfaces of the paper insertion slot 2. Alternatively, the paper guide 4 may be maintained in the closed state by forming a locking portion (not shown) that is elastically locked to each other in the paper guide 4 and the paper insertion opening 2. Further, since the paper guide 4 is formed as a single piece and has a small size, it is possible to reduce the manufacturing cost of the molding die and the molding material cost and to reduce the dimensional variation of the paper guide 4 due to the influence of the shrinkage ratio. By bending the projecting piece 8, the paper guide 4 can be attached to and detached from the housing 1 with one touch.

It is also possible to remove the fulcrum portion 10 of the paper guide 4 from this groove by forming a groove penetrating from the inner peripheral surface of the concave hinge portion 14 to the opening surface of the paper insertion opening 2. In this case, it is not necessary to bend the base of the paper guide 4, and therefore the notch 7 is not required.

[0011]

According to the present invention, a main body of a printing apparatus having a paper insertion opening formed on the outer surface thereof, a pair of left and right paper guides for guiding both side edges of the paper inserted through the paper insertion opening, and the paper insertion opening. A fulcrum portion formed on the base portion of the paper guide and positioned on an axis perpendicular to the paper to be inserted into
A plurality of sheets are formed on both sides of the sheet insertion opening corresponding to a plurality of types of sheet widths, and the fulcrum portions of the sheet guides are constituted by hinge portions that are rotatably and detachably held. By engaging the fulcrum part of the guide and the hinge part provided in the paper insertion port of the housing, the paper guide can be rotated with the rotation axis perpendicular to the paper. When rotated in the opening direction, it can be inserted into the paper insertion slot while guiding both sides of the paper by the pair of left and right paper guides, and the fulcrum of the paper guide is engaged with the other hinge of the housing. By doing so, different sizes of paper can be guided by the same paper guide, and by rotating the paper guide in the closing direction when not in use, the paper guide has a small storage space. The paper guide can be stored on the opening surface of the paper insertion port, and because the paper guide is formed as a single item and has a small size, the manufacturing cost of the molding die and the molding material cost are reduced, and the paper guide is affected by the shrinkage rate. This has the effect of reducing the variation in size, and moreover, the paper guide can be easily attached to the hinge portion of the housing without using other parts.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a part thereof.

FIG. 3 is a partial vertical cross-sectional side view showing the support structure of the paper guide.

FIG. 4 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Housing 2 Paper Insertion Portion 3 Paper 4 Paper Guide 10 Support Point 14 Hinge

Claims (1)

[Claims] 1. A main body of a printer having a paper insertion opening formed on an outer surface thereof, a pair of left and right paper guides for guiding both side edges of a paper inserted from the paper insertion opening, and the paper insertion opening. A fulcrum portion formed on a base portion of the paper guide positioned on an axis orthogonal to the paper, and a plurality of fulcrums formed on both sides of the paper insertion opening corresponding to a plurality of paper widths, respectively. A sheet guide device, wherein the fulcrum portion of the sheet guide is composed of a hinge portion that is rotatably and detachably held.