JP4424281B2 - Printer - Google Patents

Description

  The present invention relates to a printer.

  As a printer of a laser type or the like, for example, a printer described in Patent Document 1 (Japanese Patent Laid-Open No. 10-231031) is known.

  This conventional laser printer has a paper feed tray, and the paper is stored in the image forming apparatus main body while being stacked on the tray bottom plate of the paper feed tray. The tray bottom plate is provided such that the front end thereof is swingable around the rear end portion, and the tray bottom plate is pressed upward by a spring provided at the lower portion of the tray bottom plate.

As a structure for pivotally supporting the tray on the main body side, a structure described in Patent Document 2 (Japanese Patent Laid-Open No. 2002-347997) is known.
Japanese Patent Laid-Open No. 10-231031 JP 2002-347997 A

  In the printer described in Patent Document 1, a pivot provided on a paper feed tray is rotatably supported on a bearing provided on the printer main body, a cam mechanism is provided on the printer main body, Is provided with a rotating cam, and a cam contact portion that is in contact with the rotating cam is provided on the sheet feeding tray, and the sheet in the sheet feeding tray is swung up and down by the rotation of the cam. If it is supplied into the main body, the relative positional relationship between the rotating cam and the cam contact part becomes inappropriate due to manufacturing errors and assembly errors of each part, and accurate paper feeding cannot be performed, and noise generation is not possible. There is a problem of causing it.

Even if the pivot structure described in Patent Document 2 is adopted, the above problem cannot be solved.
Therefore, the present invention can correct the relative positional relationship between the rotating cam provided on the printer main body side and the cam contact portion provided on the paper feed tray side even if a component manufacturing error or assembly error occurs. An object of the present invention is to provide a printer that can be used.

  In order to achieve the above object, the present invention has taken the following measures. That is, a feature of the present invention is that a pivot provided on the paper feed tray is rotatably supported by a bearing provided on the printer main body side, and the cam mechanism provided on the printer main body side rotates. The printer is configured such that the paper feed tray is swung around the pivot axis by contact between a cam and a cam contact portion provided on the paper feed tray, wherein the bearing portion is a member on the printer main body side. And a position adjusting means for elastically displacing the bearing portion is provided on the printer main body side.

  According to the present invention having the above-described configuration, since the bearing portion can be elastically displaced by the position adjusting means, even if there are manufacturing errors or assembly errors of the parts, those errors can be corrected, and the cam and the cam contact The relative position of the parts can be made appropriate.

  The member on the printer main body side is preferably made of synthetic resin, and the bearing portion is preferably provided at the tip of a tongue-like portion extending from the member.

  It is preferable that the position adjusting unit includes a screw screwed to the printer main body side, and a tip end of the screw is engaged with the bearing portion.

  It is preferable that a guide groove for detachably guiding the pivot shaft to the bearing portion is formed in the tongue-shaped portion.

  The member on the printer main body side is a left and right side plate, the guide groove is opened at a rear end portion of the side plate, the pivot is detachable from the opening portion, and the screw is a rear end of the side plate. The pivot is formed to project from the left and right sides of the rear end side of the paper feed tray in the left-right direction, and the cam contact portion is formed on the left and right sides of the front end side of the paper feed tray. It is preferable that the upper surface of the post is formed by protruding upward on both sides.

  Preferably, the printer is a laser printer, and the paper feed tray is provided at the bottom of the printer body.

  According to the present invention, it is possible to correct the relative positional relationship between the rotating cam provided on the printer main body side and the cam contact portion provided on the paper feed tray side even if a component manufacturing error or assembly error occurs. it can.

Embodiments based on the present invention will be described below with reference to the drawings.
1 to 3, a laser printer is exemplified as the printer of the present invention. This printer has a printer main body 1 and a paper feed tray 2 incorporated in the bottom of the main body 1.

  The paper feed tray 2 has a flat sheet placing portion 3, and a predetermined standard of printing paper is stacked on the placing portion 3 and supplied to the main body one by one.

  The sheet feeding tray 2 is made of synthetic resin, and pivots 4 are integrally formed on the left and right sides of the rear end of the sheet loading portion 3 so as to protrude in the left-right direction. The pivot 4 is formed in a cylindrical shape having a circular cross section. Posts 5 are integrally formed on the left and right sides of the front end portion of the paper loading portion 3 of the paper feed tray 2 so as to protrude upward. The upper surface of the post 5 is a cam contact portion 6.

  The printer main body 1 has a pair of left and right side plates 7 as members on the main body side. The side plate 7 is formed from a synthetic resin. A bearing portion 8 is provided on a side plate 7 which is a member on the main body side. The bearing 8 supports the pivot 4 of the paper feed tray 2 so as to be rotatable.

  The side plate 7 is formed with a tongue-like portion 11 separated from the side plate 7 except for the base 10 by forming a notch groove 9. The bearing 8 is provided at the tip of the tongue 11 opposite to the base 10 side.

  Since the tongue 11 is made of the same synthetic resin as the side plate 7, it can be elastically displaced with respect to the side plate 7.

  The tongue 11 is formed with a guide groove 12 that guides the pivot 4 to the bearing 8 in a detachable manner.

  The guide groove 12 has an opening 13 that opens at the rear end of the side plate 7. The pivot 4 can be inserted and removed from the opening 13. The guide groove 12 is formed in a curved shape from the rear to the front and from there downward to the bearing portion 8. The guide groove 12 is also opened to the inner side in the left-right direction, and is constituted by a side portion 14 and a peripheral wall portion 15. By separating the side portion 14 and the peripheral wall portion 15 by the slit 16, the displacement of the bearing portion 8 can be facilitated.

  In addition, the upper part of the bearing part 8 is provided with a communication part 17 that can receive the pivot 4 guided by the guide groove 12. The width of the communication portion 17 is smaller than the diameter of the pivot 4, and is elastically deformed by pressing the pivot 4 so that the pivot 4 can be received in the bearing portion 8. The pivot 4 received is prevented from detaching from the bearing portion 8 by the communication portion 17. However, by applying a large force, it is possible to disengage after passing through the communication portion 17.

  A cam mechanism 18 is provided on the printer body side. The cam mechanism 18 includes a rotating shaft 19 and a pair of left and right rotating cams 20 provided on the rotating shaft 19. The outer peripheral surfaces of the pair of rotating cams 20 are configured to come into contact with the cam contact portion 6 on the upper surface of the post 5 provided on the paper feed tray 2.

  The sheet feeding tray 2 is configured to swing around the center of the pivot 4 by the rotation of the rotating cam 20. By this swinging motion, the printing paper in the paper feed tray 2 is supplied to the main body side.

  Therefore, if the relative positions of both the rotating cam 20 and the cam contact portion 6 are not appropriate, the paper feeding operation becomes inaccurate and causes noise.

  Therefore, in order to correct the relative positional relationship between the two, a position adjusting means 21 for elastically displacing the bearing portion 8 is provided on the printer body side.

  The position adjusting means 21 includes a screw 22 screwed to the printer main body side. The tip of the screw 22 is engaged with the bearing portion 8.

  The screw 22 is screwed to the side plate 7 from the rear end portion of the side plate 7. That is, the side plate 7 is provided with a female screw hole 23 penetrating in the front-rear direction. A male screw 22 is screwed into the screw hole 23, and the tip of the male screw 22 abuts on the outer peripheral surface of the bearing portion 8. ing.

  The position of the bearing portion 8 can be moved forward by screwing the male screw 22. By returning the screw 22, the bearing portion 8 is elastically displaced and restored to its original state.

  Thus, by adjusting the position of the bearing portion 8 in the front-rear direction by the position adjusting means 21, the contact position between the rotating cam 20 and the cam contact portion 6 can be adjusted to an appropriate one.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It does not become the basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the claims. Further, all modifications within the meaning and scope equivalent to the scope of the claims are included.

  The present invention can be used in the industry of the laser printer manufacturing field.

It is a perspective view of the principal part of the printer of this Embodiment. It is an enlarged view of FIG. It is sectional drawing of the principal part of the printer of this Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Printer main body, 2 Paper feed tray, 4 Pivot, 5 Post, 6 Cam contact part, 7 Main body side member (side plate), 8 Bearing part, 11 Tongue part, 12 Guide groove, 13 Opening part, 18 Cam mechanism, 20 rotating cams, 21 position adjusting means, 22 screws.

Claims (6)

A pivot provided on the paper feed tray is rotatably supported by a bearing provided on the printer main body side, and a cam provided on the printer main body side and a cam provided on the paper feed tray. A printer configured to swing the paper feed tray around the pivot axis by contact with a contact portion,
The printer is a laser printer;
The paper feed tray is provided at the bottom of the printer body,
The bearing portion is integrally formed with the member on the printer body side, and is provided so as to be elastically displaceable.
The printer main body side is provided with a position adjusting means for performing elastic displacement of the bearing portion,
The member on the printer main body side is made of synthetic resin, and the bearing portion is provided at the tip of a tongue-shaped portion extending from the member.
The position adjusting means comprises a screw screwed to the printer main body side, and the tip of the screw is engaged with the bearing portion,
The tongue-shaped portion is formed with a guide groove for detachably guiding the pivot shaft to the bearing portion,
The printer body side member is a left and right side plate, the guide groove is open at the rear end of the side plate, the pivot can be inserted and removed from the opening,
The screw is screwed to the side plate from the rear end of the side plate,
The pivot is formed to protrude in the left-right direction on the left and right side portions on the rear end side of the paper feed tray,
2. The printer according to claim 1, wherein the cam contact portion is constituted by an upper surface of a post that is formed to project upward on both left and right side portions on the front end side of the paper feed tray. A pivot provided on the paper feed tray is rotatably supported by a bearing provided on the printer main body side, and a cam provided on the printer main body side and a cam provided on the paper feed tray. A printer configured to swing the paper feed tray around the pivot axis by contact with a contact portion,
The bearing portion is integrally formed with the member on the printer body side, and is provided so as to be elastically displaceable.
A printer characterized in that a position adjusting means for elastically displacing the bearing portion is provided on the printer main body side.   3. The printer according to claim 2, wherein the member on the printer main body side is made of a synthetic resin, and the bearing portion is provided at a tip of a tongue-shaped portion extending from the member.   4. The printer according to claim 3, wherein the position adjusting means comprises a screw screwed to the printer main body, and a tip end of the screw is engaged with the bearing portion.   5. The printer according to claim 3, wherein the tongue-shaped portion is formed with a guide groove for detachably guiding the pivot shaft to the bearing portion. The printer body side member is a left and right side plate, the guide groove is open at the rear end of the side plate, the pivot can be inserted and removed from the opening,
The screw is screwed to the side plate from the rear end of the side plate,
The pivot is formed to protrude in the left-right direction on the left and right sides on the rear end side of the paper feed tray,
6. The printer according to claim 5, wherein the cam contact portion is constituted by an upper surface of a post which is formed to protrude upward on both left and right side portions on the front end side of the paper feed tray.

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