JP2002127551A - Overturn-preventing mechanism and printer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent overturn of a vertically installed printer (device) without increasing its occupation area. SOLUTION: By using a support shaft 9 parallel to one side face 2b (which is brought in close proximity to a placing face when the body of the printer is inclined), an overturn-preventing member 8 is rotatably supported to the other side face 2a (which is perpendicular to the one side face). The one side face is brought in close proximity to the placing face when the body 4 of the printer is inclined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device used in a vertical position, for example, a printer, a personal computer (PC), and the like, and relates to a technique for preventing the device from falling down.

[0002]

2. Description of the Related Art In recent years, with the spread of computers, various peripheral devices have been developed, and various types of devices have been installed around the computers. For this reason, the places where these are installed (on a desk, on the floor, etc.) become too small, and there is a demand for space-saving of these devices.

[0003] Therefore, in terms of effective use of space,
Various devices are designed to be vertically long or designed to be used vertically, so that the area occupied by these devices is reduced.

FIG. 20 shows a printer a used in a vertically long state.

[0005] The printer a has a flat box-shaped outer casing b, and in a state where the outer casing b is placed vertically, a paper feed tray c and a paper discharge tray d are housed in a detachable manner from the upper surface thereof. I have.

[0006] Further, pedestals e, e protruding laterally are provided on the side surface approaching the installation surface when the printer a is inclined on the bottom surface of the outer casing b. The printer a is prevented from falling down. In addition, the above "side surface approaching the installation surface when inclined"
Is a surface corresponding to the long side when the printer a is viewed in a plane.

The printer a has pedestals e, e.
Pedestal parts e and e even when used vertically
It is hard to fall down on the side where is provided.

[0008]

However, in the above-mentioned printer "a", the pedestal portions e and e have an occupied area even though the printer is vertically set in order to save the occupied area. There is a problem that becomes large.

Therefore, when the pedestals e, e are made smaller,
The effect of the fall prevention is drastically reduced, and the pedestals e, e
If is increased, it is difficult to fall, but the occupied area becomes large.

Accordingly, the present invention relates to a device which is used in a vertical position as described above, and an object of the present invention is to prevent overturning without increasing the occupied area.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a mechanism for preventing a vehicle from overturning on one side or the other by means of a support shaft substantially parallel to one side of the device. The prevention member is rotatably supported, and the one side surface is a side surface approaching the installation surface when the device main body is inclined.

Further, a fall prevention member is rotatably supported on one side or another side by a support shaft substantially parallel to one side of the printer, and the one side is provided when the apparatus main body is inclined. It is a side approaching the installation surface.

Therefore, in the overturn prevention mechanism and the printer using the same according to the present invention, when the apparatus body (printer) is about to overturn and tilts, the overturn prevention member moves in the direction in which the apparatus body (printer) overturns. In order to prevent the device from turning over and falling down, it is possible to effectively prevent the device from being placed vertically, and the mechanism for that does not protrude to the side when the device does not fall over. This does not increase the occupied area, and can save space.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a fall prevention mechanism of the present invention and a printer using the same will be described with reference to the accompanying drawings.

FIGS. 1 to 6 show a first embodiment of the present invention. In the illustrated first embodiment, the overturn prevention mechanism of the present invention is applied to a printer.

The printer 1 has a flat box-shaped, that is, a rectangular parallelepiped outer casing 2, and the outer casing 2 is used vertically, and a print head is provided in a lower portion of the outer casing 2. And a paper feed tray 5 and a paper discharge tray 6 from the upper surface of the printer main body 4 so as to be housed in the outer casing 2 so as to be detachably inserted from above. Has become. FIG. 1 shows a state where the paper feed tray 5 and the paper discharge tray 6 are stored in the printer main body 4.

The outer casing 2 of the printer 1 is provided with overturning prevention mechanisms 7, 7 on its lateral side surfaces 2a, 2a, respectively. It is to be noted that the drawing is performed for only one overturn prevention mechanism 7.

Here, the side surface 2a in the "transverse direction" refers to the installation surface E when the printer body 4 placed vertically is inclined.
The surface 2a is orthogonal to the side surface 2b approaching the right side, and corresponds to "another side surface" described in the claims.

The overturn prevention mechanism 7 includes an inverted T-shaped overturn prevention member 8, a support shaft 9 for rotatably supporting the overturn prevention member 8 on the outer casing 2, and a lock means for appropriately preventing the overturn prevention member 8 from rotating. 10
(See FIG. 1).

As described above, since the support shaft 9 for rotatably supporting the overturn prevention member 8 is provided on the side surfaces 2a, 2a of the outer casing 2, the printer 1 is inclined to overturn. It is parallel to the side surface 2b sometimes approaching the installation surface E and is provided horizontally (see FIG. 1).

The overturn preventing member 8 has a long portion 8a which is long in the vertical direction and both arm portions 8b, 8b which extend in the left and right direction at the lower end thereof (see FIGS. 2, 3 and 4).

A tapered portion 11 is formed on the outer surface of the portion slightly lower than the upper end of the elongated portion 8a so as to become thinner toward the upper end, and straddles the tapered portion 11. As described above, the long hole 14 is formed between the thin portion 12 on the tip side and the long main body 13 (see FIGS. 5 and 6).

The elongated portion 8a is rotatably supported on the side surface 2a of the outer casing 2 by a support shaft 9 inserted through the elongated hole 14, and the printer 1 is placed vertically (when erected).
In this case, since the overturn prevention member 8 is lowered by its own weight, the support shaft 9 is located at the upper end in the elongated hole 14, and the support shaft 9 is located at the thin portion 12 and its head 9a
Is in a state not in contact with the tapered portion 11 to the long main body portion 13. In this state, the lower edges of both arms 8b, 8b of the fall prevention member 8 are in contact with the ground plane E or slightly float (see FIG. 2).

The locking means 10 comprises the tapered portion 11 and the head 9a of the support shaft 9. That is, the support shaft 9 has a head 9a whose width is larger than the width of the elongated hole 14 and a shaft portion 9b having a length (an interval between the surface of the outer casing 2 and the head 9a) having the elongated portion 8a. Is formed slightly longer than the thickness of the thin portion 12 and slightly shorter than the thickness of the long main body portion 13, and when the fall prevention member 8 is pushed up from below, the support shaft 9 is relatively long. The tapered portion 11 and the long main body portion 13 are moved between the hole 14 and the head 9a and the surface of the outer casing 2 so as to function as the locking means 10 (FIGS. 5 and 6). reference). This configuration corresponds to claim 2 of the claims.

When the printer 1 is about to fall and the outer casing 2 is inclined with respect to the ground plane E, the fall prevention member 8 is moved by its own weight and inertia so as to maintain the long portion 8a in a vertical state. Therefore, the overturn prevention member 8
Rotates relative to the outer casing 2 (see FIG. 3).

When the vertical line p passing through the center of gravity G of the printer 1 is inclined and becomes inclined, the printer 1 itself becomes positive when it crosses the lower edge of the side surface 2b approaching the installation surface E, that is, the ground point. It is impossible to return to the upright state, and the inclination angle is further increased (see FIG. 4).

At about the same time or slightly later, the arm portions 8b, 8b of the overturn prevention member 8 are grounded, and the overturn of the printer 1 is prevented (see FIG. 4).

At this time, a force that pushes up from below acts on the overturn prevention member 8, and the support shaft 9 moves relatively downward in the elongated hole 14, and the surface of the outer casing 2 and the head 9 a of the support shaft 9. The tapered portion 11 to the long main body portion 13 are held between them, whereby the open state of the fall prevention member 8 with respect to the outer casing 2 is fixed at that angle, and the locking means 10 functions. (See FIG. 6).

As a result, the overturn prevention mechanism 7 is in a functioning state, the printer 1 is in a state where the overturn prevention member 8 supports the overturn, and further tilting is prevented. Further, since the fall prevention member 8 has an inverted T-shape, its arms 8b, 8b are in line contact with the contact surface E (the contact area is large). State) can be stably held (FIGS. 4 and 6).
reference). This configuration corresponds to claim 5 of the claims.

As a situation in which the printer 1 is likely to fall as described above, for example, something hits the desk on which the printer 1 is placed, or the top of the printer 1 itself. In addition to the possibility of something hitting, the printer 1
Is likely to fall.

FIGS. 7 to 11 show a second embodiment 7A of the fall prevention mechanism of the present invention.

The second embodiment is different from the first embodiment in that the shape of the tipping prevention member and the application of the tipping prevention member to the printer body 4 prevent the tipping prevention member from returning. Means and opening prevention means are provided. Only the main parts are shown in the drawings, and the description thereof will be made only for the above-mentioned differences, and other parts will be described in the respective parts of the drawings in the first embodiment. The same reference numerals are given to the same parts in the overturn prevention mechanism 7 according to the embodiment, and the description thereof will be omitted.

The overturn prevention mechanism 7A is provided with an overturn prevention member 15 rotatably supported by the support shaft 9 on the side surface 2a of the printer 1, and prevents the overturn prevention member 15 from returning from an open state at a predetermined angle. Return prevention means 16 and an opening prevention means 17 for preventing the overturn prevention member 15 from opening more than a certain amount (see FIGS. 7, 8 and 9). The insertion hole into which the support shaft 9 that supports the fall prevention member 15 is inserted has a circular shape, and has a different shape from the elongated hole 14 of the fall prevention member 8 according to the first embodiment.

The tipping prevention member 15 has a rod shape when viewed from the side, and the lower end edge is formed to be rounded (see FIGS. 7, 8 and 9).

The return preventing means 16 includes a concave portion 18 formed in the outer casing 2, a button member 19 inserted in the concave portion 18, a small spring 20 for urging the button member 19 to project outward. Consists of Although not shown, the button member 19 protrudes slightly from the surface of the outer casing 2, but the entirety of the button member 19 does not fall out of the recess 18 (see FIGS. 10 and 11).
This configuration corresponds to claim 4 of the claims.

The return prevention means 16 is provided at a position below the support shaft 9 of the outer casing 2 and is appropriately separated. When the printer 1A is upright, the button member 19 of the return prevention means 16 is turned over. 8 is hidden by the long portion 8a so as not to protrude outward (FIG. 10).
reference).

The opening preventing means 17 comprises stoppers 21, 21 projecting below the support shaft 9 and at positions appropriately shifted to the left and right (see FIG. 11). When the tipping prevention member 15 is inclined with respect to 2, the tipping prevention member 15 comes into contact with the stopper 21 so that the opening angle of the tipping prevention member 15 is not further increased (see FIG. 9). This configuration corresponds to claim 3 of the claims.

When the printer 1A is about to fall and the outer casing 2 is inclined with respect to the ground plane E, the fall prevention member 15 does not move to maintain the vertical state due to its own weight and inertia. The member 15 rotates relatively to the outer casing 2 (see FIG. 8).

When the fall prevention member 15 is at a predetermined angle with respect to the outer casing 2, the button member 19 of the return preventing means 16 is exposed and protrudes from the surface of the outer casing 2. Thus, the overturn preventing member 8 does not rotate in the direction of reducing the opening angle, that is, the returning direction (see FIG. 9).

When the printer 1A cannot return to the erect state, the lower end of the fall prevention member 15 is grounded almost simultaneously or slightly later, and the printer 1A is prevented from falling. In this state, the opening prevention means 1
The overturn prevention member 15 is not in contact with the stopper 21 serving as 7 (see FIG. 9).

In the state where the printer 1A is prevented from overturning by the overturning prevention mechanism 7A, the overturning prevention member 1
5 is oriented in a substantially vertical direction, and if it is slightly tilted to either side, the fall prevention member 15 cannot support the tilted printer 1A, and it is conceivable that the printer 1A falls. In the fall prevention mechanism 7A according to the embodiment, the return prevention means 16 and the opening prevention means 17 can prevent these.

For example, when the opening prevention means 17 is not provided (see FIG. 12), the vertical line p of the center of gravity G of the printer 1A is positioned between the lower edge (ground point) of the outer casing 2 and the ground point of the fall prevention member 15. In the state where the fall prevention member 15 is located between the fall prevention members 15, a force to open the fall prevention member 15 is further exerted.
It is possible that A falls.

In order to prevent the overturn preventing member 15 from opening beyond a certain angle by the opening preventing means 17,
Even when the position of the vertical line p of the center of gravity G of the printer 1A is located between the two ground points, the printer 1A does not fall.

If the return prevention means 16 is not provided (see FIG. 13), the vertical line p of the center of gravity G of the printer 1A is closer to the lower edge (ground point) of the outer casing 2 than the ground point of the overturn prevention member 15. In this state, the fall prevention member 15 exerts a force in the direction of decreasing its opening angle, and the fall prevention member 15 that has opened at an angle may return, and the printer 1A may fall.

The printer 1A can be prevented from tipping over by preventing the tipping prevention member 15 once opened to a predetermined angle from returning by the return prevention means 16.

A non-slip material such as rubber may be provided at the lower edge of the fall prevention member 15, that is, at the ground contact portion.

FIGS. 14 to 16 show a third embodiment 7B of the fall prevention mechanism of the present invention.

The third embodiment differs from the first embodiment in that a fall prevention member is provided on a side surface approaching an installation surface when the printer is inclined. Only the main parts are shown, and the description is made only for the above-mentioned differences, and other parts are denoted by the same reference numerals given to the same parts in the overturn prevention mechanism according to the first embodiment. The description is omitted by attaching the same reference numerals.

The overturn prevention member 22 is formed of a plate-like member having an inverted T-shape when viewed from the front, and the upper end thereof has a printer 1B.
Are rotatably supported via support shafts 23 on the side surfaces 2b, 2b approaching the installation surface E when tilted.

That is, on the side surface 2b of the printer 1B, a support shaft 2 parallel and horizontal to the side surface 2b is provided at a position substantially at the center in the left-right direction and appropriately shifted downward from the upper end.
3 is fixed to a position slightly protruding from the surface of the outer casing 2 (see FIG. 14).

Here, the "side surface approaching the installation surface when inclined" 2b is the "one side surface" described in the claims.
Is equivalent to

The upper end edge of the fall prevention member 22 is provided with supported holes 24, 24 divided into right and left.
The support shaft 23 is inserted through the supported holes 24, 24, whereby the fall prevention member 22 is rotatably supported on the surface of the outer casing 2.

The fall prevention member 22 supported on the side surface 2b of the outer casing 2 has a lower end edge thereof separated from the grounding surface E as appropriate.

At the upper end of the tipping prevention member 22, opening prevention pieces 25, 25 extending upward from the supported holes 24, 24 are integrally formed, whereby the tipping prevention member 22 is formed.
After being opened at a predetermined angle with respect to the outer casing 2, it does not open any more, and functions as a support rod of the inclined printer 1B (see FIG. 16).

However, when the printer 1B is about to fall and the outer casing 2 is inclined with respect to the ground plane E, the fall prevention member 22 does not move to maintain the vertical state due to its own weight and inertia. The member 22 rotates relatively to the outer casing 2 (see FIG. 16).

When the vertical line p passing through the center of gravity G of the printer 1B crosses the lower edge of the side surface 2b approaching the installation surface E when the printer 1B is inclined, that is, exceeds the grounding point, the printer 1B itself stands upright. It is impossible to return, and when the inclination angle is further increased, the lower edge of the overturn prevention member 22 is grounded, thereby preventing the printer 1B from overturning (see FIG. 16). Also, at this time, the opening preventing pieces 25, 25 are slightly separated from the surface of the outer casing 2, and when the overturn preventing member 22 tries to open any more, the tilting is prevented, Printer 1 surely
B can be prevented from falling.

FIG. 17 shows a modification 26 of the overturn prevention member 22 according to the third embodiment.

The fall prevention member 26 is rotated by a rotating shaft 27 parallel to the surface of the outer casing 2 and inclined with respect to the ground plane E.
Is rotatably supported.

When the printer 1B is about to fall and the outer casing 2 is inclined with respect to the ground plane E, the overturn prevention member 26 attempts to maintain a vertical state due to its own weight and inertia. Rotates relative to the outer casing 2 and can prevent the printer 1 from tipping over in the same manner as the tipping prevention members 8, 15, 22 described in the first to third embodiments ( See FIG. 17).

FIGS. 18 to 19 show a fourth embodiment 7C of the fall prevention mechanism of the present invention.

The difference between the fourth embodiment and the third embodiment is that when the printer is about to tip over and tilts, the tipping prevention member is positively rotated. The drawing shows only the main parts,
The description will be made only for the above-mentioned differences, and the other portions will be described by giving the same reference numerals to the same portions in the overturn prevention mechanism according to the third embodiment. Is omitted.

The overturn prevention member 28 has side surfaces 2b, 2b whose upper ends approach the installation surface E when the printer 1C is inclined.
Is rotatably supported via a support shaft,
A torsion coil spring 29 is externally fitted to the support shaft, and is urged in a direction in which the overturn prevention member 28 is always opened, that is, in a direction in which it tilts with respect to the outer casing 2.

At the lower part of the printer 1C, there is provided a lock mechanism 30 for preventing the overturn prevention member 28 from opening. When the lock mechanism 30 is operating, the overturn prevention member 28 is connected to the torsion coil spring. It is held so as to stick to the surface of the outer casing 2 against the resilience of the outer casing 29 (FIG. 18).
reference).

The lock mechanism 30 has a lock lever 31 which is a lower portion inside the outer casing 2 and has a rotation axis substantially at the center of the two side surfaces 2b and 2b approaching the installation surface E when the printer 1C is inclined. One end of the lock lever 31 is provided with a lock claw 33 that penetrates the side surface 2b and engages with a locking hole 32 formed at the lower end of the overturn prevention member 28.
A projection 34 projecting downward is provided at the other end, and the projection 34 is provided so as to be able to project from the bottom plate 2 c of the outer casing 2 to the lower surface side.

Further, such a lock lever 31 is formed by the small spring 35 provided on the bottom plate 2 c of the outer casing 2.
4 is urged in a direction protruding from the bottom plate 2c to the lower surface side (see FIGS. 18 and 19).

Therefore, when the printer 1C is in the upright state, the protruding portion 34 which is going to protrude downward from the bottom plate is retracted by the grounding surface E, and the lock lever 31 is rotated against the small spring 35. Thus, the lock claw 33 is engaged with the locking hole 32 of the fall prevention member 28, and the fall prevention member 28 is held in a state of sticking to the side surface 2b (see FIG. 18).

When the printer 1C is about to fall, one edge of the bottom plate 2c is lifted and one of the bottom plates 2c is lifted, so that the lock lever 31 rotates in the direction in which the projection 34 projects from the bottom plate 2c. (Figure 1
9).

When the lock lever 31 is rotated, the lock claw 33 is disengaged from the locking hole 32 of the tipping prevention member 28, and the tipping prevention member 28 is
The elastic member 9 is rotated in the opening direction with respect to the outer casing 2 (see FIG. 19).

Although illustration and explanation are omitted, a similar overturn preventing mechanism 7C is provided to prevent overturning in the opposite direction.
Is provided.

When the vertical line p passing through the center of gravity G of the printer 1C crosses the lower edge of the side surface 2b approaching the installation surface E when the printer 1C is inclined, that is, exceeds the ground point, the printer 1C itself stands upright. When the inclination angle is further increased, since the overturn prevention member 28 has already protruded, it becomes a supporting rod, and the overturn of the printer 1C is prevented (FIG. 19).

Therefore, in the overturn prevention mechanism 7C according to the fourth embodiment, when the printer 1C is about to overturn, the overturn prevention member 28 is opened to a predetermined angle without fail. Falling can be reliably prevented. This configuration corresponds to claim 7 of the claims.

The point that the opening preventing pieces 25, 25 are provided so as not to open the overturn preventing member 28 more than necessary is the same as the overturn preventing mechanism 7B according to the third embodiment.

In each of the above embodiments, a printer as a peripheral device of a computer has been described. However, the present invention is not limited to this, and various types of printers that are relatively thin and used in a vertically installed state can be used. Of course, it can also be used for a device, for example, a personal computer (PC) main body.

In each of the above embodiments and modifications, the plane shape is substantially rectangular. However, the present invention is not limited to this. For example, square, elliptical, semicircular, etc. It can be applied to all the shapes that easily fall down when placed.

In addition, the specific shape and structure of each part shown in each of the above-described embodiments and modified examples are merely examples of the embodiment of the present invention, and The technical scope of the present invention should not be construed as being limited.

[0076]

As is apparent from the above description, the overturn prevention mechanism of the present invention rotates the overturn prevention member on one side or the other side by a support shaft substantially parallel to one side of the device. The apparatus is freely supported, and the one side is a side approaching the installation surface when the apparatus main body is inclined.

In the printer of the present invention, a fall prevention member is rotatably supported on the one side or the other side by a support shaft substantially parallel to the one side, and the one side is inclined by the printer. This is the side that comes closer to the installation surface when it is done.

Therefore, in the overturn prevention mechanism and the printer using the same according to the present invention, when the apparatus body (printer) tries to overturn, the overturn prevention member rotates in the direction in which the apparatus body (printer) falls. In order to prevent the device from falling down, it is possible to effectively prevent the device placed vertically from overturning, and the mechanism for that does not protrude sideways from the device when it does not fall over, so the occupied area of the entire device Is not increased, and space can be saved.

According to the second aspect of the present invention, since the lock means for suppressing the rotation of the fall prevention member when the fall prevention member rotates and comes into contact with the ground contact surface is provided, the open state is provided. Thus, the fall prevention member can be held, and the state in which the device main body is prevented from falling can be stably held.

According to the third aspect of the present invention, the opening preventing means for preventing the overturning member from rotating in the opening direction so that the overturning preventing member does not rotate more than a predetermined angle with respect to the apparatus main body is provided. With this arrangement, the overturn prevention member does not open more than necessary, and the state in which the apparatus main body is prevented from overturning can be stably maintained.

According to the fourth aspect of the present invention, when the overturn preventing member is rotated by a predetermined angle with respect to the apparatus main body, the opened overturn preventing member is prevented from returning to the range of the predetermined angle. Since the return prevention means is provided, it is possible to prevent the fall prevention member once opened from falling back and falling down, and to stably maintain the state in which the apparatus main body is prevented from falling down.

According to the fifth aspect of the present invention, since the overturn prevention member is formed in a substantially inverted T-shape, the state can be stabilized when the overturn prevention member is grounded. Thus, it is possible to stably maintain a state in which the apparatus main body is prevented from tipping over.

In the invention described in claim 6, since the rotation support shaft of the overturn prevention member is provided horizontally, when the apparatus body is about to overturn, the overturn prevention member is smoothly rotated. This is performed, and the fall prevention mechanism can function without providing any special mechanism.

According to the seventh aspect of the present invention, when the apparatus main body is inclined, the overturn prevention member pops out and rotates, so that the transfer prevention member is positively rotated. Thus, it is possible to reliably prevent the apparatus main body from overturning.

[Brief description of the drawings]

FIGS. 2 to 6 show a first embodiment in which a fall prevention mechanism according to the present invention is applied to a printer. FIG. 1 is a perspective view showing a state where the printer is placed vertically. .

FIG. 2 is a side view illustrating a state in which the printer is erected.

FIG. 3 is a side view showing a state in which the printer is about to fall and is slightly inclined with respect to a ground contact surface.

FIG. 4 is a side view showing a state in which the printer is prevented from tipping over.

FIG. 5 is an enlarged view of the locking means together with FIG. 6; FIG. 5A is an unlocked state, FIG. 5A is a front view, and FIG.

6A and 6B show a locked state, in which FIG. 6A is a front view, and FIG.

FIGS. 8 to 13 show a second embodiment in which the overturn prevention mechanism according to the present invention is applied to a printer, and FIG. 7 is a side view showing a state in which the printer is erected.

FIG. 8 is a side view showing a state in which the printer is about to fall and is slightly inclined with respect to the ground contact surface.

FIG. 9 is a side view illustrating a state in which the printer is prevented from tipping over.

FIG. 10 is an enlarged view of the return preventing means together with FIG. 11, wherein FIG. 10A is a front view and FIG.

11A and 11B show a state in which the return preventing means operates, and FIG.
Is a front view, and (b) is a sectional view.

FIG. 12 is a side view for explaining a case where there is no opening prevention means.

FIG. 13 is a side view for explaining a case where there is no return prevention means.

FIGS. 15 and 16 show a third embodiment in which the overturn prevention mechanism according to the present invention is applied to a printer. FIG. 14 is a perspective view showing a state where the printer is placed vertically. .

FIG. 15 is a side view showing a state where the printer is erected.

FIG. 16 is a side view showing a state in which the printer is prevented from tipping over.

FIG. 17 is a perspective view of the entire printer showing a modification of the overturn prevention member.

FIG. 18 is a side view showing a fourth embodiment in which the overturn prevention mechanism according to the present invention is applied to a printer together with FIG. 19, and showing a state in which the printer is erected.

FIG. 19 is a side view showing a state in which the printer is prevented from tipping over.

FIG. 20 is a perspective view showing a conventional printer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printer (device), 2a ... Other side surface (side surface orthogonal to the installation surface when inclined), 2b ... One side surface (side surface approaching the installation surface when inclined), 4 ... Printer body ( Device body), 7: overturn prevention mechanism, 8: overturn prevention member, 9: support shaft, 10: locking means, E: ground plane,
1A: Printer, 7A: Overturn prevention mechanism, 15: Overturn prevention member, 16: Return prevention means, 17: Opening prevention means, 1
B: Printer, 7B: Overturn prevention mechanism, 22: Overturn prevention member, 23: Support shaft, 26: Overturn prevention member, 27: Rotating axis, 1C: Printer, 7C: Overturn prevention mechanism, 28: Overturn prevention member

Claims (8)

[Claims] 1. A fall prevention mechanism for a device used in a vertical position, wherein a fall prevention member is rotatable on one side or another side by a support shaft substantially parallel to one side of the device. Wherein the one side surface is a side surface approaching the installation surface when the device main body is inclined. 2. The overturn prevention mechanism according to claim 1, further comprising a lock means for suppressing the rotation of the overturn prevention member when the overturn prevention member rotates and comes into contact with the ground contact surface. Features a fall prevention mechanism. 3. The overturn prevention mechanism according to claim 1, wherein the overturn prevention member prevents the overturn prevention member from rotating in the opening direction such that the overturn prevention member does not rotate beyond a predetermined angle with respect to the apparatus main body. A fall prevention mechanism characterized by providing a prevention means. 4. The overturn prevention mechanism according to claim 1, wherein when the overturn prevention member is rotated by a predetermined angle with respect to the apparatus main body, the opened overturn prevention member is returned to within the range of the predetermined angle. A fall-prevention mechanism characterized by providing a return-prevention means for preventing the fall. 5. The overturn prevention mechanism according to claim 1, wherein the overturn prevention member is formed in a substantially inverted T-shape. 6. The overturn prevention mechanism according to claim 1, wherein a rotation support shaft of the overturn prevention member is provided horizontally. 7. The overturn prevention mechanism according to claim 1, wherein the overturn prevention member pops out and rotates when the apparatus main body is inclined. 8. A printer used in a vertical position, wherein a fall prevention member is rotatably supported on one side or another side by a support shaft substantially parallel to one side of the printer. The one side surface is a side surface which approaches the installation surface when the printer is inclined.