JP4351597B2 - Document crimping plate opening and closing device - Google Patents

Description

  The present invention is particularly effective when there is a weight such as an original pressure plate of a copying machine or a printing machine (hereinafter simply referred to as a printing machine) to which a heavy object such as an automatic document feeder is attached, and the weight is offset to one side. BACKGROUND OF THE INVENTION 1. Field of the Invention

  Conventionally, as a document crimping plate opening / closing device with a lift function for dealing with a thick document such as a book, a mounting member attached to the apparatus main body side and a support member pivotally attached to the mounting member A lift member for attaching a rear portion of the original pressure bonding plate that is pivotally attached to the free end side of the support member, elastic means provided between the attachment member and the free end side of the support member, and the lift member What comprises the control means which controls inversion (rotation) with respect to the support member of this is well-known.

  This conventionally known document crimping plate opening / closing device is a case where a document crimping plate with a heavy weight such as an automatic document feeder is attached, and when the center of gravity is at the center in the left-right direction of the document crimping plate, The document pressing plate is supported by using one document pressing plate opening / closing device having a large torque at the most heavy part.

  As shown in FIG. 1, the above-described conventional document pressing plate opening / closing device with a lift function has a center of gravity 2 of the document pressing plate 1 in relation to the automatic document feeder 3 attached to the document pressing plate 1. When moving to one of the two sides, the original pressure-bonding plate opening / closing device A having the function of holding the original pressure-bonding plate 1 at an intermediate opening angle and preventing a sudden drop, and the left / right balance during the lift operation In order to facilitate the smooth opening and closing operation of the original cover 1, another auxiliary original cover 1 is required.

  It is an object of the present invention to provide a document crimping plate opening / closing device that performs such an auxiliary opening / closing function.

In order to achieve the above-described object, the present invention provides a mounting member having a substantially L-shaped cross section composed of a mounting plate and a bearing plate that are mounted on the apparatus main body, and a plate-shaped mounting member on the bearing plate of the mounting member. A support member that supports the opening and closing operation of the bearing-type and pivotally supported original crimping plate , a plate-like base material portion, and a cross-section that is bent alternately in the perpendicular direction above and below the base material portion. It has an adjustment piece and an attachment piece provided so as to be substantially Z-shaped, and comprises a lift member that is pivotally supported by a single bearing type and pivotally on the free end side of the support member, The original pressure plate is attached to the attachment piece of the lift member, and a first restricting means for restricting a rotation range of the support member between the attachment member and the support member, the support member, When the thick document is handled between the lift member and the lift member, Characterized in that a second regulating means for regulating the range.

The present invention also provides a mounting member having a substantially L-shaped cross section comprising a mounting plate and a bearing plate mounted on the apparatus main body, a plate-shaped mounting member, and a single bearing type and rotatable on the bearing plate of the mounting member. A supporting member that supports the opening / closing operation of the document pressing plate that is pivotally supported, a plate-like base material portion, and an upper and lower side of the base material portion that are alternately bent in a right-angle direction so as to have a substantially Z-shaped cross section. A lift member having an adjustment piece and an attachment piece provided in the above-mentioned manner and having the base member portion pivotally supported on the free end side of the support member, and the lift member and the attachment member or A tension coil spring stretched between the lift member and the support member for biasing the lift member in a direction overlapping the support member between the support member and the mounting of the lift member; Attaching the original pressure plate to a piece, A first restricting means for restricting a rotation range of the support member between the attachment member and the support member, and a rotation range of the lift member when the thick document is handled between the support member and the lift member. It is characterized in that a second restricting means for restricting is provided.

In any of the above cases, a horizontal position adjusting means for the original pressure plate comprising a first adjusting screw provided for adjusting the height of the lift member is provided between the lift member and the support member. In addition, a parallel position adjusting means for the original pressure plate including a second adjusting screw for adjusting the mounting position of the mounting member with respect to the apparatus main body is provided between the mounting member and the adjustment plate attached to the apparatus main body. Is.

  Since the present invention is configured as described above, the following effects can be obtained.

  According to the first aspect of the present invention, when a document pressing plate having a simple configuration and having a center of gravity offset by attaching an automatic document feeder is lifted corresponding to a thick document, another document pressing is performed. It is possible to effectively prevent the original cover from being bent or twisted in cooperation with the plate opening / closing device.

  According to the second aspect of the present invention, the same effect as that of the first aspect is obtained, and the return operation of the lift member becomes smooth. Therefore, the return operation of the original cover after the lift operation is ensured. obtain.

When configured as in claim 3, the horizontal position adjusting means can be adjusted so that the pressure-bonding state of the original pressing plate to the contact glass becomes uniform. When configured as in claim 4, the parallel position adjusting means allows The parallel position of the original cover with respect to the contact glass can be adjusted.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a document crimping plate opening / closing device according to the present invention will be described in detail with reference to the accompanying drawings.

  FIGS. 2 to 4 show an embodiment of a document crimping plate opening / closing device A that performs an auxiliary function. Reference numeral 10 denotes a mounting member formed by bending a mounting plate 10a and a bearing plate 10b into a substantially L-shaped cross section. The mounting plate 10a is slidably mounted on the adjustment plate 22 mounted on the apparatus main body 11 such as a copying machine via a mounting button 23. Reference numeral 24 denotes a parallel position adjusting means for the mounting member 10, which is tightened with an adjusting screw 25 screwed between a moving piece 10 c protruding from the rear portion of the mounting member 10 and a fixed piece 22 a protruding from the adjusting plate 22. It consists of a nut 26. The parallel position adjusting means 24 may also be provided in the document pressing plate opening / closing device B described later. By using the screwdriver to turn the adjusting screw 25 in either the left or right direction, the mounting member 10 slides in either the front or back direction.

  Reference numeral 12 denotes a support member for supporting the original cover 13, a cylindrical bearing member (not shown) fixed to the bearing plate 10 b of the mounting member 10, and a first hinge pin having a large-diameter portion inserted through the bearing member. 14 is supported by a single bearing type and rotatably. A friction plate 15 is interposed between the support member 12 and the bearing plate 10b of the mounting member 10 so that the first hinge pin 14 is inserted into the center thereof. It is devised to generate torque.

16 is a substantially crank-shaped cross section (substantially Z-shaped) having a plate-like base material portion 16c and mounting pieces 16b and adjustment pieces 16d that are bent in alternate perpendicular directions from above and below the base material portion 16c. ) And a single bearing through a cylindrical bearing member (not shown) attached to the free end side of the support member 12 and a second hinge pin 17 having the same large diameter portion inserted through the bearing member. It is supported by a mold and swingable. A friction plate 18 is interposed between the support member 12 and the lift member 16 by inserting the second hinge pin 17 through the center thereof, and the end of the second hinge pin 17 is caulked to support the support member. Friction torque is generated at the shaft support portions of 12 and the lift member 16. A tension coil spring 19 is stretched between one of a plurality of locking holes (not shown) provided in the lift member 16 and a locking piece 12a provided in the support member 12, so that the lift member 16 is always supported by the support member 12. It is energized in the direction that overlaps. A guide pin 20 is further attached to the support member 12 and is fitted into a guide groove 16 a provided in the lift member 16. The guide pin 20 and the guide groove 16a constitute a second restricting means 28 that restricts the rotation range of the lift member 16 relative to the support member 12.

  Reference numeral 21 denotes a horizontal position adjusting means for the original cover 13, a first adjusting screw 21 a screwed to the adjusting piece 16 d of the lift member 16 and having its tip abutted against the back portion 12 b of the supporting member 12, and a tightening nut. 21b. The rear portion of the attachment portion 13 a of the original cover 13 is fixed to the attachment piece 16 b of the lift member 16. Reference numeral 10d denotes a stopper piece for the contact piece 12c provided on the support member 12. The first restriction means 27 for restricting the rotation range of the support member 12 relative to the mounting member 10 by the stopper piece 10d and the contact piece 12c is provided. It is composed.

  In the above embodiment, if the tension coil spring 19 stretched between the support member 12 and the lift member 16 is present, the return operation of the lift member 16 becomes smooth, but this may be omitted. In that case, there is an advantage that the number of parts can be omitted.

  FIGS. 5 to 7 show a document crimping plate opening / closing device B having another structure, and both side plates 30a, 30a of the mounting member 30 having a substantially U-shaped cross section fixed on the apparatus main body 11 have the same cross section substantially C. Both side plates 32 a and 32 a of the channel-shaped support member 32 are pivotally attached to one end portions thereof via the first hinge pins 33. Although not shown, a friction washer and a spring washer with a first hinge pin 33 inserted in the center thereof are superimposed on the axially attached portions of the side plates 30a, 30a, 32a, 32a of the mounting member 30 and the support member 32, respectively. Friction means configured by caulking the end portion of the first hinge pin 33 is installed. A cam member 35 is fixed between the side plates 30 a and 30 a of the mounting member 30 by a first hinge pin 33 and a fixing pin 34.

  On the free end side of the both side plates 32a, 32a of the support member 32, a lift member 36 having mounting plates 36a, 36a projecting on both sides is provided through one side portion of the side plates 36b, 36b via a second hinge pin 37. And is pivotally mounted. An operating pin 38 is pivoted at a position different from the position where the second hinge pin 37 of the both side plates 36b, 36b of the lift member 36 is attached to the support member 32. Attachment portions 13a and 13a (only one of them) of the original pressure plate 13 are fixed to the attachment plates 36a and 36a of the lift member 36.

  Reference numerals 39a and 39a denote compression coil springs. The compression coil springs 39a and 39a are accommodated in a pair of cylindrical sliders 40 and 41 slidably held by the holding portions 32b and 32b of the support member 32. The sliders 40 and 41 are provided between the operating pin 38 on the lift member 36 side and the cam member 35 on the attachment member 30 side through the sliders 40 and 41. Reference numeral 42 denotes a stopper pin for the slider 41 on the cam member 35 side.

  Reference numeral 43 denotes a horizontal position adjusting means for the original cover 13, which is composed of a second adjusting screw 43 a and a tightening nut 43 b which are screwed to the wrist member 36 and have their tips abutted against the upper surface of the support member 32. .

Therefore, when the original is a thin original such as paper, the original pressing plate 13 is opened and closed by the elasticity of the elastic means 39 including the compression coil springs 39a and 39b provided between the lift member 36 and the mounting member 30. It is operated without being reversed over the entire stroke of the operation, and is stably stopped and held at a predetermined opening angle by the slider 41 abutting on the cam member 35. When the original is a thick original such as a book, as shown in FIG. 7, the operating pin 38 is elasticized by placing the original pressing plate 13 against the thick original 44 and pushing down the front side slightly strongly. By pressing the means 39, the lift member 36 is reversed against the elasticity, and the upper part of the thick original 44 can be covered with the original pressing plate 13 as shown by the solid line in FIG. At that time, the operating pin 38 fits into the notches 32c and 32c (only one is shown) provided in the both side plates 32a and 32a of the support member 32, thereby enabling the lift member 36 to be reversed. When the thick original 44 is removed, the original pressing plate 13 is automatically rotated via the lift member 36 by the elastic force of the elastic means 39 to return to the original position and overlap the support member 32.

  Similarly, when the lift member 36 is reversed, the lift member 16 of the document crimping plate opening / closing device B is also reversed, and the document crimping plate 13 covers the upper surface of the thick document 44 horizontally. When the thick original 44 is removed, the original position is returned to the original position by the indexing force of the spring 19. Of course, here, even if the spring 19 is not provided, when the lift member 36 of the document crimping plate opening / closing device A returns, the lift member 16 of the document crimping plate opening / closing device B also returns to its original position. Can do. However, the certainty of operation can be achieved with the spring.

  In the above-described embodiment, the original pressure plate opening / closing device A has the elastic means 39 composed of the compression coil springs 39a and 39b accommodated in the sliders 40 and 41 held by the support member 32 and is mounted on the cam on the mounting member 30 side. Although an elastic member is provided between the member 35 and the operating pin 38 on the lift member 36 side, the attachment member side of the elastic means 39 composed of the compression coil springs 39a and 39b is different from the hinge pin 33 on the attachment member. You may comprise so that it may support with the spring receiving member pivotally attached to the position.

  In addition, the compression coil springs can be used side by side with the same diameter, in addition to overlapping the large and small ones as described above.

  The document pressure plate horizontal position adjusting means 21 and 43 adjust the document pressure plate 13 so that the document pressure plate 13 can be in horizontal contact with the contact glass when the document pressure plate 13 is closed. It is configured so that it can be pressed against the contact glass horizontally so that the document to be fed is not twisted or twisted. By turning the adjusting screws 21a, 43a, the lift member 16, 36 swings around the second hinge pins 17 and 37 to determine the horizontal position of the original cover 13.

  Next, the parallel position adjusting means 24 adjusts the automatic document feeder so that the roller of the automatic document feeder is at right angles to the paper feeding direction. The member 10 is slid back and forth so that the roller of the automatic document feeder is adjusted to be perpendicular to the paper feeding direction.

  Further, as means for slidably attaching the sliders 40 and 41 to the support member 32, in addition to the embodiment, a concave-convex fitting between both side plates of the support member and the side portions of the slider, or notches and protrusions can be provided. You may replace with the means by engagement.

It is explanatory drawing explaining the meaning of this invention. 1 is a side view of a document crimping plate opening / closing device A according to the present invention. FIG. FIG. 3 is a front view of a document crimping plate opening / closing device A according to FIG. 2. FIG. 3 is an explanatory diagram for explaining a use state of the document crimping plate opening / closing device A according to FIG. 2. FIG. 3 is a side view of the document crimping plate opening / closing device B according to the present invention. FIG. 6 is a side sectional view of the document crimping plate opening / closing device B shown in FIG. 5. FIG. 6 is an explanatory diagram for explaining a use state of the document crimping plate opening / closing device B shown in FIG. 5.

Explanation of symbols

A Document pressing plate opening / closing device B Document pressing plate opening / closing device 10, 30 Mounting member 10a Mounting plate 10b Bearing plate 11 Main body 12, 32 Support member 13 Document pressing plate 14, 33 First hinge pin 15 Friction plate 16, 36 Lift member 16a Guide groove 16b Mounting piece 16c Base material portion 16d Adjustment piece 17, 37 Second hinge pin 18 Friction plate 19 Tensile coil spring 20 Guide pin 21, 43 Horizontal position adjustment means 24 Parallel position adjustment means 27 First restriction means 28 Second restriction Means 34 Fixing pin 35 Cam member 38 Actuation pin 40, 41 Slider 42 Stopper pin

Claims (4)

A mounting member having a substantially L-shaped cross section comprising a mounting plate and a bearing plate mounted on the apparatus main body, and a manuscript that is plate-shaped and is pivotally supported on the bearing plate of the mounting member in a single-bearing type and rotatably. A support member that supports the opening and closing operation of the crimping plate, and an adjustment provided so that the plate-like base material portion and the upper and lower sides of the base material portion are alternately bent in a right-angle direction to have a substantially Z-shaped cross section. A lift member that has a piece and an attachment piece, and the base member is supported on the free end side of the support member by a single bearing type and is pivotally supported, and the original plate is attached to the attachment piece of the lift member And a first restricting means for restricting a rotation range of the support member between the attachment member and the support member, and a thick document between the support member and the lift member. Providing a second restricting means for restricting the rotation range of the lift member Wherein, the original cover closer. A mounting member having a substantially L-shaped cross section comprising a mounting plate and a bearing plate mounted on the apparatus main body, and a manuscript that is plate-shaped and is pivotally supported on the bearing plate of the mounting member in a single-bearing type and rotatably. A support member that supports the opening and closing operation of the crimping plate, and an adjustment provided so that the plate-like base material portion and the upper and lower sides of the base material portion are alternately bent in a right-angle direction to have a substantially Z-shaped cross section. A lift member having a piece and an attachment piece, and the base member is pivotally supported on the free end side of the support member in a single-bearing type, and between the lift member and the attachment member or the support member And a tension coil spring stretched between the lift member and the support member to urge the lift member in a direction overlapping the support member, and the original document is crimped to the attachment piece of the lift member. A plate is attached and the attachment member and the front A first restricting means for restricting a rotation range of the support member between the support members, and a second for restricting the rotation range of the lift member between the support member and the lift member when dealing with a thick document. A document crimping plate opening and closing device, characterized in that a regulating means is provided.   The horizontal position adjusting means of the original cover plate comprising a first adjusting screw provided for adjusting the height of the lift member is provided between the lift member and the support member. 3. A document crimping plate opening / closing device according to any one of 1 to 2.   A parallel position adjusting means for the original pressure plate comprising a second adjusting screw for adjusting the mounting position of the mounting member with respect to the apparatus main body is provided between the mounting member and the adjusting plate attached to the apparatus main body. 3. The document crimping plate opening / closing device according to claim 1 or 2.

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