JPH11301861A - Pull-out device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pulled-out member to be pulled out while being lifted up from being pulled off in the midst, without being stopped. SOLUTION: When a sheet storage tray 22 is straightly pulled out in a sliding direction, a pull-out stopping member 14 is put in contact with a stopper 13 and stopped. Even if the sheet storage tray 22 is attempted to be lifted up and pulled out, the pull-out stopping member 14, supported in a freely oscillatable manner, is put in contact with the stopper 13 and stopped. The pull-out stopping member is oscillatedly operated to cancel contact with the stopper 13 so that the sheet storage tray 22 can be pulled out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawer device for enabling a member to be pulled out and mounted to a main body of various devices.

[0002]

2. Description of the Related Art Various types of devices are provided with a drawer device for allowing the device to be pulled out and attached to the device body. For example, an image forming apparatus such as a copying machine, a laser beam printer, and an LED printer that records an image by an electrophotographic process is provided with a drawer device for drawing and pushing various components into and from the image forming apparatus body. Have been.

FIG. 11 shows an example of this. The example of the drawer provided in the image forming apparatus 1 is provided to store a sheet storage tray 2 containing a large number of sheets (sheets) for forming a desired image in the image forming apparatus main body. Is what it is.

FIG. 12 is a perspective view of the drawer. The sheet storage tray 2 has a groove 3 serving as a guide when the drawer is pulled out, and a rail on a later-described rail of the image forming apparatus 1 so that the drawer can be pulled out smoothly. Roller member 4, which rolls
5 are provided. The roller member 4 is rotatable around a shaft 6, the roller member 5 is rotatable around a shaft 7, and the shafts 6 and 7 are fixed to a roller support member 8.

On the other hand, in the image forming apparatus 1, as shown in FIG. 13, a rail 9 serving as a guide for pulling out the paper storage tray 2 and roller members 4 and 5 arranged in the paper storage tray 2 roll. A rail 10 is provided. The rail 9 has a substantially U-shape that opens downward, and the groove 3 of the paper storage tray 2 is fitted thereon, so that the position of the paper storage tray 2 in the left-right direction is determined.

FIG. 14 is a side view of the image forming apparatus 1 when the sheet storage tray 2 is pulled out, and FIG. 15 is a detailed side view of FIG. As shown in FIG. 15, the rail 10 includes an outer rail 11 and an inner rail 12, and the inner rail 12 slides inside the outer rail 11 fixed to the image forming apparatus 1. ing. Outer rail 11
The inner rail 12 and the inner rail 12 are usually formed of sheet metal because rigidity is required.

When the paper storage tray 2 is pulled out, a stop portion 13 provided at the end of the inner rail 12 collides with the end of the roller support member 8, and in a state as shown in FIGS. The paper storage tray 2 is stopped so that it cannot be pulled out. As shown, the stop 13 of the inner rail 12 is formed by bending the bottom surface of the inner rail 12 into a substantially Z-shape.

[0008]

However, in the above-mentioned prior art, when the paper storage tray 2 is lifted up in front of the paper storage tray 2, that is, toward the drawing side of FIG. The end of 8 is pulled out without contacting the stop 13 of the inner rail 12.

This is because, for example, when the image forming apparatus 1 is placed at a low place, and the operator grasps and pulls out the handle of the paper storage tray 2 in FIG. 11 from a high place, the handle portion is easily lifted up. This easily occurs because the member 8 also goes up.

As a result, the sheet storage tray 2 is separated from the image forming apparatus 1, so that the function of stopping the sheet storage tray 2 does not function, and it has been a problem to solve the problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is intended to prevent a member to be pulled out by a drawer from being pulled out even if the member is tilted, and to easily pull out by releasing a stop. It is intended for.

[0012]

SUMMARY OF THE INVENTION The present invention relates to a drawer which slides a member to be pulled out and supports the member to be drawn out, and a rail arranged along a pulling-out direction; Engaging means for moving the member to be pulled out along the rail by engaging with the drawer; and a drawer stop member for stopping the drawer at a predetermined drawer stop position when the member to be drawn out is drawn out. The stop member is movably provided between a position for stopping the drawer and a position for releasing the stop.

[0013]

1 to 5 show a first embodiment of the present invention. FIG. 1 is a perspective view of a drawer device, FIG. 2 is a detailed view of a drawer stop member, and FIGS. FIG. 5 is a side view of the image forming apparatus, FIG. 3 is a view in which the drawer is pulled out substantially horizontally, FIG. 4 is a view in which the drawer is pulled out while lifting the front of the drawer, and FIG. It is the figure which showed the extraction operation | movement. Components having the same shape and function as those of the related art are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 1, reference numeral 22 denotes a paper storage tray as a member to be pulled out, 3 denotes a groove serving as a guide for pulling out, 4 and 5 roller members which roll by contacting rails provided in the image forming apparatus 1, Reference numerals 6 and 7 denote shafts serving as rotation axes of the roller members 4 and 5, respectively. Reference numeral 8 denotes a roller support member to which the shafts 6 and 7 are fixed, and reference numeral 14 denotes a pull-out stop member.

The draw-out stopping member 14 has an arrow around the axis 6.
It is swingable in the A direction, and in a free state, it swings downward by its own weight and falls. The drawer stop member 14 will be described in more detail. As shown in FIG. 2, a round hole 15 into which the shaft 6 is fitted, an elongated round hole 16 centered on a radius r from the center of the round hole 15, and the paper storage tray 22 are formed. It consists of a stopping part 17 for stopping. The oblong hole 16 maintains the gap a shown in the drawing in the entire swing range with the shaft 7, so that the pull-out stopping member 14 can swing smoothly. When the pullout stopping member 14 is lowered by its own weight, the shaft 7 is moved to the upper end 16 of the oval hole 16.
Here, the draw-out stopping member 14 is in a state of being completely lowered when it hits -1.

When the paper storage tray 22 provided with such a pull-out stop member 14 is pulled out from the image forming apparatus 1, when the paper storage tray 22 is pulled out substantially horizontally as shown in FIG. The contact stop rotation causes the drawer stop member 14 to slide on the rail surface of the inner rail 12. Then, the stop 17 of the drawer stop member 14 contacts the stop 13 of the inner rail 12 to stop the sheet storage tray 22.

On the other hand, when the paper storage tray 22 is lifted in front of the paper storage tray 22, that is, the side from which the paper storage tray 22 is pulled out, and the paper storage tray 22 is tilted and pulled out, as shown in FIG.
Floats from the rail surface of the inner rail 12. However, even if the paper storage tray 22 is lifted, the drawer stop member 14 swings down by its own weight and falls.
Slides on the rail surface of the inner rail 12 while maintaining the same posture as that in which it was pulled out. Then, the stop portion 17 of the drawer stop member contacts the stop portion 13 of the inner rail 12 to stop the sheet storage tray 22. Thus, the sheet storage tray 22 is not pulled out of the image forming apparatus 1.

When completely pulling out the sheet storage tray 22 from the image forming apparatus 1, as shown in FIG. 5, when the operator lifts the leading end of the drawer stop member 14, the stop 17 of the drawer stop member 14 is moved inward. Since the sheet storage tray 22 is retracted from the stop portion 13 of the rail 12, the sheet storage tray 22 can be easily pulled out.

FIGS. 6 to 8 show a second embodiment of the present invention. 6 is a perspective view of the pull-out stop member and the handle member, FIG. 7 is a perspective view of the inner rail, and FIG. 8 is a side view of the rail, the pull-out stop member, and the handle member.

The present embodiment differs from the first embodiment in that a handle member is provided, and the same members as in the first embodiment are denoted by the same reference numerals.

In FIG. 6, reference numeral 14 denotes a pull-out stop member, and a handle member 18 is attached to an end thereof. The handle member 18 covers the tip of the draw-out stopping member 14, and is made of synthetic resin.

When the operator completely pulls out the sheet storage tray 22, the position where the pull-out stop member 14 is lifted can be clearly seen, so that the stop portion 17 of the pull-out stop member 14 is easily retracted from the stop portion 13 of the inner rail 12. Can be. Further, the handle member 18 is formed with a convex portion 18-1 having a partly inclined surface as a guide portion.

On the other hand, the inner rail 12 has a substantially U-shape as shown in FIG.
2-1 and 12-2 are formed. The outer rail 11 has a similar shape, and the U-shaped portion of the inner rail 12 and the outer surfaces of the bent portions 12-1 and 12-2 slide on the inner surface of the outer rail 11.

The drawer stopping member 14 is
2 slides on the rail surface of the inner rail 12 where the inner rail 12 is located in the entire pull-out range of FIG. As shown in a), it is completely lowered by its own weight in a free state. When the sheet storage tray 22 is pulled out from this state, as shown in FIG. 8B, first, the slope of the convex portion 18-1 of the handle member 18 comes into contact with the bent portion 12-1 of the inner rail 12. When the sheet storage tray 22 is further pulled, as shown in FIG. 8C, the handle 18 is lifted up by the slope of the convex portion 18-1 of the handle 18 and the pull-out stopping member 14 is pulled up.
Also swings up.

As a result, the draw-out stopping member 14 can smoothly enter the inner rail 12 and ride on the rail surface.

In the present embodiment, the operability of the operator is improved by mounting the handle 18 made of synthetic resin, and the swinging position of the draw-out stopping member 14 is controlled by the projection 18-1 of the handle 18. Then, the drawer stopping member 14
Can ride on the inner rail smoothly. As a result, the rail can be set shorter, and downsizing and cost reduction can be achieved.

FIGS. 9 and 10 show a third embodiment of the present invention. FIG. 9 is a side view of the drawer stopping member, and FIG. 10 is a side view of a main part of the drawer.

In the present embodiment, the shape of the pull-out stopping member is different from that of the second embodiment, and the same members as those of the second embodiment are denoted by the same reference numerals.

In FIG. 9, the draw-out stopping member 24 is provided with an elongated hole 19 into which the shaft 6 is inserted, and an elongated hole 20 centered on the radius r from the center of the elongated hole 19. The oval hole 19 is a long oval hole which is long in the left and right directions, is approximately the same as or slightly wider than the outer diameter of the shaft 6 in the vertical direction, and is fitted. forming b.

The oblong hole 20 extends in the direction of its short diameter, that is, the oblong hole 1
The normal direction about the center of the center 9 has a width c, which is substantially the same as or slightly larger than the outer diameter of the shaft 7, and is fitted. The draw-out stopping member 24 is fitted with the shaft 7 and the width c of the oval hole 20. However, since the oval hole 19 and the shaft 6 have a gap b in the left-right direction, the pull-out stopping member 24 swings around the shaft 6 smoothly. it can. When the pull-out stopping member 24 is lowered by its own weight, the shaft 7 abuts on the upper end portion 20-1 of the elongated hole 20, and the pull-out stopping member 24 is lowered at this point.

When the stop portion 27 of the draw-out stop member 24 collides with the stop portion 13 of the inner rail, an impact load is applied to the draw-out stop member 24 in the direction of arrow f as shown in FIG. This load is applied because the elongated hole 20 is in contact with the shaft 7.
The shaft 7 and the roller supporting member 8 receive a load through the elongated hole 20.

As a result, the impact load applied to the pull-out stop member 24 is received by the shaft 7 near the pull-out stop member 24. Therefore, compared to the impact load received by the shaft 6 of the first and second embodiments, the pull-out stop member 24 Only an impact load is applied to a portion of the pull-out stop member 24, and the drawer stop member 24 can be made thinner and lighter.

[0033]

As described above in detail, according to the present invention, in a drawer device which can be slid and pulled out and is guided by a rail serving as a guide when being pulled out, the drawer device when pulled out The drawer stop member is provided so as to be movable between a position where the drawer device stops and a position where the drawer device does not stop, thereby preventing the drawer device from being accidentally pulled out by a cheap and simple configuration. it can.

Further, a handle member is provided on the drawer stop member, which can manually switch the drawer stop member to switch the position of the drawer stop member between a position where the drawer device is stopped and a position where it is not stopped. By providing the guide member for guiding the stop member to the guide portion of the rail, the operability of the operator can be improved, and the draw-out stop member can smoothly ride on the rail.

Further, by receiving the impact load applied to the stop portion of the drawer stop member in the vicinity of the stop portion of the drawer stop member, the drawer stop member can be made thinner and lighter.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drawer device according to a first embodiment of the present invention.

FIG. 2 is a detailed view of a drawer stop member according to the first embodiment of the present invention.

FIG. 3 is a side view of the image forming apparatus according to the first embodiment of the present invention, in which a paper storage tray is pulled out substantially horizontally;

FIG. 4 is a side view of the image forming apparatus according to the first embodiment of the present invention, in which the paper storage tray is pulled out while being raised in front of the paper storage tray;

FIG. 5 is a side view of the image forming apparatus according to the first embodiment of the present invention, showing an operation of completely pulling out a sheet storage tray from the image forming apparatus.

FIG. 6 is a perspective view of a pull-out stop member and a handle member according to the second embodiment of the present invention.

FIG. 7 is a perspective view of an inner rail according to the second embodiment of the present invention.

FIG. 8 is a side view of a rail, a pull-out stop member, and a handle member according to the second embodiment of the present invention.

FIG. 9 is a detailed view of a drawer stop member according to the third embodiment of the present invention.

FIG. 10 is a side view of a main part of a drawer device according to a third embodiment of the present invention.

FIG. 11 is a front external view of the image forming apparatus.

FIG. 12 is a perspective view of a conventional drawer device.

FIG. 13 is a detailed view of an image forming apparatus.

FIG. 14 is a side view of a conventional image forming apparatus.

FIG. 15 is a detailed side view of a conventional image forming apparatus.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2, 22 Paper storage tray 3 Groove 5 Roller member 7 Shaft 8 Roller support member 10 Rail 11 Outer rail 12 Inner rail 13 Inner rail stop 14, 24 Pull-out stop member 15 Round hole 16 , 19, 20 Oval hole 17, 27 Stopper of draw-out stop member 18 Handle member

Claims (7)

[Claims] 1. A drawer device that slides and supports a member to be pulled out so as to be able to be pulled out, a rail arranged along a drawing direction, a member arranged on the member to be pulled out, and engaged with the rail to be pulled out. Engaging means for moving the member along the rail, and a drawer stop member for stopping at a predetermined drawer stop position when the member to be drawn is drawn, wherein the drawer stop member stops the drawer. And a position for releasing the stop. 2. The drawing device according to claim 1, wherein a stop portion is formed on the rail, and the member to be pulled out is stopped when the drawer stop member comes into contact with the stop portion. 3. A drawer stop member is swingably supported so that the drawer stop member and the stop portion come into contact with each other even if the member to be drawn is moved up and down, and the drawer stop member contacts the stop portion. 3. The drawer stop member is swung to a position where the stop is released in order to remove the lock.
A drawer device according to claim 1. 4. The device according to claim 1, wherein said engaging means has a roller member which rolls by engaging with said rail, and said pull-out stop member is swingable about a rotation axis of said roller member. 4. The drawing device according to 3. 5. A drawer stop member provided with a handle member for manually moving the drawer stop member to switch the position of the drawer stop member between a position where the drawer device is stopped and a position where it is not stopped. The drawer device according to any one of claims 1 to 4, wherein 6. The drawing device according to claim 5, wherein a guide portion for guiding the pull-out stopping member to a guide portion of the rail is provided on the handle member. 7. A drawer device according to claim 1, a sheet storage tray as a member to be pulled out slidably supported by the drawer device, and a sheet fed from the sheet storage tray. And an image forming means for forming an image on the image forming apparatus.