JP3294406B2 - Sliding fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding fence in which the setting position of a fence element acting as a screen is adjustable, and more particularly, the setting position of a fence element can be adjusted smoothly and freely. The present invention relates to improving a sliding fence so that a fence element is stably held in an adjusted set position without rattling.

[0002]

2. Description of the Related Art A discharge tray for receiving and storing rectangular paper that has been printed or copied by a printing machine or a copying machine and receives the paper is usually caused to collide with a leading edge of the paper and to move in the front-rear direction of the paper. A fence element, which acts as a screen for aligning the position or aligning both side edges of the sheet, is slidably provided along a guide rail or groove according to the size of the sheet. An example of a paper discharge tray provided with such a sliding fence is shown in FIG. 1 attached to a paper discharge port of a printing press. That is, in FIG. 1, a paper discharge tray 12 is attached to a paper discharge port of the printing press 10, and a fence element 14 for aligning the front ends of the paper discharged from the printing press 10 is provided on the discharge tray 12. The fence elements 16, 16 for aligning both side edges thereof are provided so as to be movable in the vertical direction or the horizontal direction of the sheet discharge tray 12 according to the size of the sheet.

Conventionally, this type of movable fence has been mounted on a paper discharge tray so as to be adjustable in a set position by a guide structure as shown in FIG. That is, in FIG.
Reference numeral 18 denotes a moving table which is slidably mounted on the paper discharge tray 12 as shown in FIG. 1, for example. The moving table has a pair of sliding contact surfaces 20, 20 extending in parallel with each other. It faces a pair of parallel extending guide surfaces 22 provided on the paper discharge tray 12 and moves along the guide surface 22 by sliding engagement between the sliding contact surface and the guide surface. And the fence element 14 carried by the tray 1
2 is set to an arbitrary adjustment position. A leaf spring 26 is provided between the flange portion 24 of the movable table 18 and the paper discharge tray 12, and keeps the movable table 18 elastically pressed against the paper discharge tray 12. The sliding surface 20 of the moving table 18 and the discharge tray 12 facing the sliding surface 20
Between the guide surfaces 22 of the moving table 1 on the discharge tray 12.
A gap 28 is left to the extent necessary for lightly moving the guide 8 along the guide surface 22 by hand. In FIG. 6, the gap 28 is shown to be considerably larger than the overall size of the moving table 18 for the sake of clarity.

[0004]

In the conventional movable fence having the above-mentioned structure, the fence element 14 or the movable base 18 is required to change the set position of the fence element 14.
When the force in the moving direction is exerted on the moving table 18 by hand, there is no problem if the force is applied to the position just in the center of the moving table 18 in the direction along the guide surface 22. When the force applied to the transfer tray 18 is applied to the discharge tray 12 in an eccentric state that generates a torque component for rotating the transfer table 18, the sliding contact surface 20 of the transfer table is cut along a line 7-7 in FIG. As shown in FIG. 7, the guide surface 22 hits the guide surface 22 in a diagonal direction. When such a one-sided contact occurs, the corner of the sliding contact surface 20 bites on the guide surface 22, and the movement of the movable base 18 along the guide surface 22 becomes irregular or waving, or the so-called stick is generated. There is a risk that the 18 will not move. Also, when the fence element 14 is set at the predetermined set position, the fence element 14 has the sliding contact surface 20 hitting the guide surface 22 at one corner along one diagonal as shown in FIG. The fence element 14 does not necessarily have to be connected to the output tray because it can rotate relative to the output tray between a deflected state and a deflected state in which the guide surface 22 hits the guide surface 22 at a corner along one other diagonal. It is not stably held at a predetermined angular position with respect to 12,
There is a possibility that the rectangular sheet stored on the paper discharge tray may hit one side edge or side edge.

[0005] In view of the above-mentioned problems in the conventional sliding fence, the present invention always adjusts the set position smoothly regardless of the slight deflection of the force applied by hand, and at the set position. It is an object of the present invention to provide an improved sliding fence in which the fence element is always correctly and stably held in a predetermined direction.

[0006]

According to the present invention , a pair of strip-shaped guide surfaces extending in parallel with each other, and the pair of guide surfaces extending in parallel with each other are provided. A movable table having a pair of sliding contact surfaces slidably engaged with;
And a fence element carried on the moving table, in the sliding fence can adjust the set position of the fence elements at any position along the guide surface, a front Symbol pair of guide surfaces The pair of sliding surfaces are perpendicular to the respective extending directions.
V forming the inclination angle same irregularities at opposite one another viewed in Do cross section
Adapted to each other entirely contact exhibits a cam surface inclined to the shape, and characterized in that the spring element is provided against the pair of guide surfaces pressing the pair of sliding contact surfaces elastically Is achieved by a sliding fence.

In the sliding fence having the above structure, the pair of guide surfaces are two slopes of a rail portion having a trapezoidal convex portion in the cross section, and the sliding contact surface has a V-shaped concave portion in the cross section. May be two slopes of the groove portion. Or, also,
The pair of guide surfaces may be two slopes of a groove having a V-shaped recess in cross section, and the sliding contact surfaces may be two slopes of a rail having a trapezoidal protrusion in cross section.

[0008]

Operation and effects As described above, the extending directions are parallel to each other.
That the pair of sliding contact surfaces pair of moving stand extending direction carrying the fence element guide surface of the strip are parallel to each other At a configuration that engages slidingly, and these pair of guide surfaces The pair of sliding contact surfaces are viewed from each other in a cross section perpendicular to each extending direction, and
Irregularities are configured caused a cam surface inclined in a V-shape which forms the same angle of inclination are opposite to entirely contact each other, a spring element for pressing the pair Shi pair of sliding contact surfaces resiliently the pair of guide surfaces Is provided, even if the pair of sliding surfaces is deflected with respect to the pair of guide surfaces, the deflection is absorbed by the lateral deviation of the pair of sliding surfaces with respect to the pair of guide surfaces. A large frictional force does not act on the sliding contact portion, no large resistance preventing the sliding contact is generated on the sliding contact portion, and no stick that hinders relative sliding between the two does not occur. In addition, when a lateral deviation occurs between the pair of guide surfaces and the pair of sliding contact surfaces, a spring force that always cancels the lateral deviation and returns the two to the original normal lateral relative position is generated. Therefore, no matter which setting position the fence element is along the guide surface, the pair of sliding contact surfaces and the pair of guide surfaces of the movable base leave a gap between them under the action of the spring force. The fence element is stably held in its set position exactly in the correct direction without any backlash, and the fence element touches the edge or side edge of the paper. The occurrence of such a situation is reliably avoided.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the sliding fence according to the present invention is incorporated in the sheet discharge tray 12 shown in FIG. 1. FIG. One of the fence elements that engages the side edges of the paper stored thereon is shown with one removed. In FIG. 2, reference numeral 14 denotes a fence element which engages with the front edge of the paper stored on the paper discharge tray 12 to align the paper in the vertical direction, similarly to the fence element 14 in FIG. Similar to the fence element 16 in FIG. 1, the fence element contacts the side edge of the sheet stored on the sheet discharge tray 12 and aligns the sheet in the left-right direction.

The fence element 14 is carried by a moving table 18, and the moving table 18 is movably guided by a rail section 30 along a pair of parallel belt-like guide surfaces formed on the moving table. I have. The fence element 16 is also movably guided by a similar carriage not shown in the figure along a rail section 32 along a pair of parallel extending strip-shaped guide surfaces provided thereon. .

FIG. 3 is an enlarged perspective view showing the detailed structures of the moving table 18 and the rail section 30. The rail portion 30 is provided with a pair of belt-like guide surfaces 34 extending in parallel with each other. The rail section 30 has a cross section including a trapezoidal projection, and the pair of guide surfaces 34, 34 is provided by a slope portion of the trapezoidal projection.

The movable table 18 has a sliding contact portion 18a made of a synthetic resin such as polyacetate resin having a pair of sliding contact surfaces 36 extending in parallel with each other, and a spring receiving portion 18b made of a metal plate. It is made in the structure. Sliding contact part 1
8a has a groove structure having a V-shaped recess in cross section, and two slopes of the V-shaped recess provide a pair of sliding contact surfaces 36,36. In the illustrated embodiment, the fence element 14 is pivotally mounted to the carriage 18 by a pivot 38 such that the fence element 14 has a raised position and a rail extending substantially perpendicular to the rail portion 30. It is configured to be selectively rotated between the overturned positions that are inclined in the direction along the part 30.

The spring receiving portion 18b of the movable base 18 has a box-shaped structure, and a rail portion 30 penetrates through holes formed in front and rear walls thereof. A spring element 40 as shown in FIG. 4 is mounted inside the box-shaped structure of the spring receiving portion 18b. The spring element 40 is seated on the bottom of the box-shaped structure of the carriage 18 at its bottom 42, and a pair of arms 44, 44 extending from one end thereof and a leg 46 extending from the other end. Elastically abuts against the lower surface of the rail portion 30, thereby elastically urging the movable table 18 downward with respect to the rail portion 30, and the pair of sliding contact surfaces 36, 36 of the movable table 18 against the rail portion 30. It is kept in a state of being elastically pressed against the pair of guide surfaces 34, 34. In the illustrated embodiment, the inclination angle of the pair of guide surfaces 34, 34 and the pair of sliding surfaces 36, 3
6, the guide surface and the sliding contact surface facing each other are in full contact with each other.
A gap is left between the upper surface 48 of the rails 0 and the lower surface 50 of the movable base 18. The movable table 18 is kept elastically pressed against the guide surfaces 34, 34 by the spring force of the spring element 40,
Is maintained in a predetermined stable state without any backlash . Guide surfaces 34, 34 and a pair of sliding surfaces 36 of a pair,
36 does not necessarily have to have the same inclination angle so as to make full contact with each other, and a pair of guide surfaces and a pair of sliding contact surfaces that are in sliding contact with each other are such that one of them has a cam surface inclined with respect to the other. , But especially a pair of guide surfaces
34, 34 and a pair of sliding contact surfaces 36, 36 have the same inclination angle
When both are in contact with each other as described above
This allows the platform to rotate in a plane perpendicular to the direction of travel.
Is stably held at a predetermined position.

In the above structure, when a relative force is applied between the movable table 18 and the rail section 30 to move the movable table 18 along the rail section 30, the force does not deflect the movable table 18 with respect to the rail section 30. as long as it does not cause large torque component to the mobile table 18 is moved as smoothly along the rail section 30. However, if the relative force applied between the carriage 18 and the rail section 30 is such as to generate a large torque component that deflects the carriage 18 with respect to the rail section 30, they are inclined with respect to each other. By the cam action generated by the pair of sliding contact surfaces 36 and the pair of guide surfaces 34, the movable table 18 receives a force in the direction of lifting from the rail portion 30, and the spring element 40 is increased according to the magnitude of the force. The moving table 18 rises from the rail section 30 while bending. But even in such more big lift,
Since the spring element 40 always exerts a spring force on the rail 18 to return the carriage 18 to its normal seating position, the springs acting between the carriage 18 and the rail 30 will deflect each other. When the torque component disappears, the carriage 18 immediately returns to the position where it is properly seated on the rail portion 30, and the normal contact engagement between the pair of sliding contact surfaces 36 and the pair of guide surfaces 34 is restored.

FIG. 5 is a perspective view similar to FIG. 3 showing another embodiment of the sliding fence according to the present invention. In this embodiment, a pair of parallel belt-like guide surfaces 52 provided on the paper discharge tray 12 have V-shaped cross sections.
The sliding surfaces 54, 54 of the moving table 18, which are slidingly engaged with these guide grooves, are provided by two slopes having a trapezoidal convex portion. Given by Thus, the uneven relationship between the pair of parallel belt-like guide surfaces extending in parallel with each other and the pair of parallel sliding contact surfaces slidingly engaged with the pair of guide surfaces is opposite to that of the embodiment shown in FIG. However, it is apparent that the same operation and effect as in the embodiment of FIG. 3 can be obtained with respect to the sliding movement of the movable table 18 with respect to the paper discharge tray 12.

In the above, the present invention has been described in detail with reference to two embodiments. However, the present invention is not limited to these embodiments, and various other embodiments are included within the scope of the present invention. It will be clear to those skilled in the art that is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view exemplifying a state in which a discharge tray provided with a sliding fence to which the present invention is applied is mounted on a discharge outlet of a printing press.

FIG. 2 is a perspective view showing one embodiment of a paper discharge tray in which a sliding fence according to the present invention is incorporated.

FIG. 3 is an enlarged perspective view showing a main part of the structure shown in FIG. 2 in more detail;

FIG. 4 is a perspective view showing a spring element incorporated in the sliding fence of FIG. 3;

FIG. 5 is a perspective view showing another embodiment of the sliding fence according to the present invention.

FIG. 6 is a sectional view showing an example of a conventional structure of a sliding fence.

FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Printing machine 12 ... Discharge tray 14, 16 ... Fence element 18 ... Moving stand 18a ... Sliding contact part of a moving stand 18b ... Spring receiving part of a moving stand 20 ... Sliding contact surface 22 ... Guide surface 24 ... Flange part 26 ... Leaf spring 28 ... gap 30, 32 ... rail part 34 ... guide surface 36 ... sliding surface 38 ... pivot 40 ... spring element 44, 46 ... arm part 48 ... upper surface 50 ... lower surface 52 ... guide surface 54 ... sliding surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 31/20

Claims (3)

(57) [Claims] 1. A pair of belt-like guide surfaces extending in parallel to each other, and a pair of sliding contact surfaces extending in parallel with each other and slidingly engaging with the pair of guide surfaces. A mobile platform, having a fence element carried on the mobile platform,
In the sliding fence can adjust the set position of the fence elements at any position along the guide surface, before <br/> Symbol pair of guide surfaces and the pair of sliding contact surfaces each extending in the In the direction
Being adapted to each other irregularities viewed in cross section perpendicular to the same angle of inclination to each other entirely in contact exhibits a cam surface inclined in a V-shape to form a reversed, the pair of against the pair of guide surfaces A sliding fence comprising a spring element for elastically pressing a sliding surface. 2. A sliding fence according to claim 1, wherein said pair of guide surfaces are two slopes of a rail portion having a trapezoidal convex section in cross section, and said sliding contact surface has a V-shaped concave section in cross section. A sliding fence characterized by two slopes of a groove including: 3. The sliding fence according to claim 1, wherein the pair of guide surfaces are two slopes of a groove having a V-shaped recess in cross section, and the sliding contact surface has a trapezoidal protrusion in cross section. A sliding fence characterized by two slopes including a rail portion.