JP6150992B2 - Movement limiter - Google Patents

Description

  The present invention relates to a movement limiter that prevents a device from falling due to vibrations caused by an earthquake or an unintended collision of an article, and restricts the movement of the device.

  Conventionally, flat-screen TV stands, pianos, personal computer tables, etc. in homes, furniture for displaying products / products in shops and factories, carts for conveying products / products, chairs, desks, mobile shelves in offices In order to move whiteboards, copy machines, etc., casters as legs are arranged at the bottom of these devices. The caster of such a device is provided with a stopper so that the rotation of the wheel can be stopped and fixed so as not to move.

  In such a conventional device, when the wheel is fixed using a stopper, the movement of the wheel is restricted at the time of an earthquake or other unintentional collision of the article, so the device itself may fall over. It was.

  Even if the equipment does not fall down, if the vibration force such as earthquake is greater than the static frictional force between the wheel surface of the caster and the installation surface where the equipment is installed, the equipment will move on the installation surface. There was a case that it slipped and moved a lot.

  In order to prevent the fall and movement of these conventional devices, in Patent Document 1, in order to constrain the four casters of furniture, a contact plate that abuts against each opposite side surface of each caster is raised by a hinge. Disclosed is a device configuration in which support rods that are provided on the floor surface so as to be tiltable and have contact surfaces at both ends that contact the contact plate from the inside are connected to connection beams that connect the left and right base legs with tension springs. ing.

  Further, in Patent Document 2, on both sides of the lower part of a device having a caster on the bottom surface, support legs whose one end is in contact with the floor surface when the device is installed on the floor surface are rotatably provided, Provide a lock mechanism that locks the support leg in contact with the floor surface. When installing the device on the floor surface, rotate the support leg so that one end abuts the floor surface and locks the device. The structure of the apparatus which prevents the fall of the is disclosed.

  Patent Document 3 discloses a fall prevention device disposed on the bottom surface of a device having a leg portion on the bottom surface facing the floor surface, wherein the fan shape is provided so as to be rotatable about a support shaft of the leg portion. The structure of the apparatus which prevents the fall of the image forming apparatus as a device by this fall prevention member is disclosed.

  JP-A-11-141610   Japanese Patent Laid-Open No. 11-028130   JP 2002-252475 A

  However, since the apparatus for preventing the overturn of the conventional apparatus as disclosed in Patent Documents 1 to 3 has to be provided in the apparatus in advance, there is a problem that it cannot be applied to any apparatus. there were.

  The object of the present invention has been made in view of the above-described circumstances, and the main object of the present invention is to provide a movement restricting device that prevents the device from overturning against vibration such as an earthquake and restricts the movement of the device. That is.

  Another object of the present invention is that, when the strength of vibration due to an earthquake or the like is relatively weak, it hardly moves with respect to the floor surface as an installation surface, and sways with the vibration of the earthquake and is relatively strong. Is to provide a movement limiter that absorbs the impact force caused by the acceleration of the earthquake by moving with respect to the floor surface.

  Still another object of the present invention is to provide a movement limiter that can be easily attached to any device.

In order to solve the above-described problems and achieve the object, the movement restricting device according to the present invention is a movement that restricts the movement of the device placed on the installation surface via the legs, according to the first aspect. A restricting tool, one side of which is in contact with the installation surface and provided on the side of the other surface, the leg portion surrounding the periphery of a leg tip portion where the leg portion is in contact with the placement surface; and the enclosure Provided on the leg tip portion side of the portion, and a riding surface portion on which the tip of the leg tip portion rides, and the enclosure portion is divided into two half cylinders in a direction parallel to the axial direction, It has a hinge portion 18 that connects the two half cylinders so that they can be opened and closed in an in-plane direction perpendicular to the axial direction thereof, and a connecting portion 19 for maintaining the closed state, and the other surface side of the enclosure portion The upper end surface of the housing is characterized in that an enclosure reinforcing portion is provided .

According to a second aspect of the present invention, in the movement restricting device, the connecting portion is elastically deformed and the protruding portion is fitted to the connecting protrusion 19a formed of a claw-like member having a protruding portion at the tip. It is characterized by comprising a connection receiving portion 19b which is a recessed portion .

According to a third aspect of the present invention, the travel restricting device is characterized in that the ride-up surface portion includes a flat portion that is parallel to the installation surface .

  According to a fourth aspect of the present invention, the movement restricting device is characterized in that the edge portion of the riding surface portion is provided with an inclined portion toward the installation surface.

  According to a fifth aspect of the present invention, the movement restricting device is characterized in that a friction portion is provided on one surface of the enclosure.

According to a sixth aspect of the present invention, the movement restricting device includes an impact absorbing portion between the enclosure portion and the leg tip portion.

  According to the present invention, it is possible to provide a movement restricting tool capable of preventing the device from overturning against vibration such as an earthquake and restricting the movement of the device.

  In addition, according to the present invention, it is possible to provide a movement limiter that reduces the impact on equipment due to vibrations such as earthquakes and that is not easily toppled even by long-period vibrations caused by earthquakes.

  Furthermore, according to the present invention, it is possible to provide a movement restricting device that can be easily attached to and detached from any device and does not obstruct or inconvenience during normal use of the device.

  The perspective view of the movement restricting tool of 1st Example of this invention   Front side perspective view when attaching the movement restricting device of the first embodiment to the device   The back side perspective view at the time of attaching the movement restricting tool of the 1st example to a device   The partial cross section side view explaining the state by which the movement of an instrument is restrict | limited by the movement restriction tool of 1st Example   The partial cross section side view which shows the movement restriction tool of 2nd Example   The partial cross section side view which shows the movement restriction tool of 3rd Example

<First embodiment>
A first embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the device whose movement is restricted by the movement restriction tool of the device of the present invention is mainly an image forming apparatus (so-called copying machine / multifunction machine), but is not limited to this. Specifically, flat-screen TV stands, pianos, personal computer tables, etc. in homes, furniture that displays products and products in shops and factories, carts that carry products and products, chairs and desks in offices, etc. In addition to the equipment in which casters as legs for moving the equipment are arranged at the lower part of the equipment for the movement of moving shelves, whiteboards, etc., various kinds of equipment that do not use casters in the legs Even if it is an instrument, the movement restriction tool of the instrument of this invention is applicable.

  Below, the 1st movement restriction tool 10 of this invention is demonstrated using FIG. 1 thru | or FIG. FIG. 1 is a perspective view of a movement restricting tool 10 according to the first embodiment of the present invention. FIG. 2 is a front side perspective view when the movement restricting tool 10 is attached to the device. FIG. 3 is a back side perspective view when the movement restricting tool 10 is attached to the device. FIG. 4 is a partial cross-sectional side view illustrating a state in which the movement of the device is restricted by the movement restricting tool 10.

  In the present invention, a so-called multi-function device 50, which is an image forming apparatus that wants to limit the overturning and movement due to vibrations caused by an earthquake or an unintentional impact of an article or the like, a so-called multi-function device 50 is provided with casters 52 as legs on its bottom surface. It is placed on the surface 58 via a caster 52. Further, in general, the caster 52 is rotatable about the shaft portion by one shaft portion fixed to the bottom surface of the multi-function device 50 by screwing or the like and the other shaft portion being pivotally supported. It is comprised from the wheel 54 as a leg end part which can roll.

  Further, the movement restricting device 10 of the present invention is provided on the side 13 of the other surface, with one surface 11 abutting on the installation surface 58 by being placed on the installation surface 58 on which the multi-function device 50 is installed, An enclosure 14 that surrounds the periphery of the wheel 54 with which the caster 52 abuts on the mounting surface 58, and a wheel abutment surface that is provided inside the enclosure 14 that is on the side of the wheel 54 in the enclosure 14 and serves as a tip of the wheel 54. And a riding surface portion 17 on which the wheel 54 abuts against the ground contact surface 58.

  According to FIG. 1, the enclosure portion 14 is a cylindrical annular member whose axial direction is perpendicular to the ground contact surface 58, and is formed on the ground contact surface 58 so that the annular member surrounds the periphery of the wheel 54. Placed. In addition, as long as the function of enclosing the periphery of the wheel 54 is achieved, the enclosure portion 14 may not have an axial direction that coincides with a direction perpendicular to the ground plane 58. The shape and structure are not limited, such as a shape. Any material can be used as long as it can withstand a collision with the enclosure 14 of the wheel 54 described later, such as various plastics, metal, and paper.

  Moreover, according to FIG. 3, the friction part 12 is provided in the one surface 11 which is the one end surface of the enclosure part 14 used as the cylindrical annular member. This friction part 12 sets and restricts the degree of movement when the movement limiter 10 of the present invention moves on the ground contact surface 58 due to earthquake vibration, and the surface shape, structure, material, etc. Examined, devised and optimized. In the first embodiment, concentric grooves about the axis of the enclosure 14 that is a cylindrical annular member are provided on the surface in contact with the ground contact surface 58. Further, in the first embodiment, the friction portion 12 is detachably fitted to the one surface 11 and can be exchanged depending on the state and material of the ground contact surface 58.

  Moreover, according to FIG.1 and FIG.2, the enclosure part reinforcement part 15 is provided in the upper end surface by the side of the other surface which is the other end surface of the enclosure part 14 by the some enclosure part fixing screw 15a. The enclosure reinforcing portion 15 is a member that reinforces the enclosure 14 so that the enclosure 14 is not chipped or broken due to the collision of the wheel 54 with the enclosure 14 due to the vibration of an earthquake. Metal, reinforced plastic, or the like is used. . In addition, it is not necessary to provide the enclosure portion 14 when the enclosure portion 14 itself is sufficiently strong, for example, when the enclosure portion 14 is not likely to be broken.

  Further, as shown in FIGS. 2 and 3, the enclosure 14 is divided into two half-cylinders in a direction parallel to the axial direction in order to be arranged on the caster 52 portion of the multi-function device 50. Further, the enclosure portion 14 includes a hinge portion 18 for connecting the two half cylinders so as to be openable and closable in a direction perpendicular to the axial direction, a connection projection portion 19a and a connection receiving portion 19b for maintaining the closed state. The connection part 19 which consists of is provided.

  In the first embodiment, the hinge portion 18 is a hinge that can be rotated around an inserted shaft portion (not shown), the claw-like member having a projection portion at the tip thereof, and the connection projection portion 19a elastically deformed, The portion 19b is a concave portion into which the protruding portion is fitted. However, the portion 19b is capable of opening and closing the enclosure portion 14 composed of two half-cylinders and capable of maintaining a closed state. The configuration, shape, and material may be anything.

  In addition, the connecting portion 19 is composed of two half cylinders by adding the weight of the multi-function device 50 to the upper end surface on the other surface side of the enclosure portion 14 when the wheel 54 collides with the enclosure portion 14 due to the earthquake. In order to prevent the closed state of the enclosure 14 from being released (for example, the hinge 18 is broken and the connection of the connection projection 19a and the connection receiving portion 19b is released), the shaft of each half cylinder An auxiliary connection projection 19c that is a protrusion extending from one end of the cylinder surface perpendicular to the direction, and an auxiliary connection receiving portion 19d that is a recess provided in the other end of the cylinder surface by inserting the auxiliary connection protrusion 19c. I have two sets. The two sets of auxiliary connection protrusions 19c and auxiliary connection receiving portions 19d may be a set, or may be omitted if the strength of the surrounding portion 14 itself is sufficient.

  As shown in FIGS. 1 and 2, the riding surface portion 17 includes a flat surface portion 17a parallel to the installation surface 58 provided on the inner side of the enclosure portion 14 on the wheel 54 side, and the wheel 54 side of the flat surface portion 17a. And an inclined portion 17b provided toward the installation surface 58 from the surface of the flat surface portion 17a that is the surface opposite to the installation surface 58. Further, the installation surface 58 is exposed on the inner side of the inclined portion 17b on the side of the wheel 54, and the wheel is placed on the exposed portion when the movement restricting device 10 is attached (installed) to the multifunction device 50. It will be. In the inclined portion 17b, for example, the thickness of the flat surface portion 17a (the width between the surface of the flat surface portion 17a and the one surface 11 of the movement restricting tool 10) is thin, and the wheel 54 can smoothly run on the flat surface portion 17a. If possible, it may not be provided.

  The riding surface portion 17 having such a configuration receives the load of the multi-function device 50 when the wheel contact surface passes through the inclined portion 17b and rides on the flat surface portion 17a due to rolling of the wheel 54 due to earthquake vibration. . As a result, when the wheel 54 collides with the enclosure portion 14 due to further rolling due to the earthquake vibration, the movement limiter 10 of the present invention is calculated by (the load of the multifunction machine) × (the friction coefficient of the friction portion 12). It produces a frictional resistance force that opposes the impact force.

  As described above, the movement limiter 10 according to the present invention can optimally set the frictional resistance force using the load of the multi-function device 50 that is the object of limiting the movement, so that the relatively small earthquake or In long-period vibrations of high-rise buildings, etc., it hardly moves relative to the installation surface 58, that is, the multi-function device 50 does not run, and in a relatively large earthquake, the installation surface 58 is allowed to move less than the earthquake vibration amplitude. By doing so, it is possible to reduce the impact on the multi-function device 50 due to the acceleration of the earthquake.

  Further, the multifunction device 50 does not run in the above-described relatively small earthquake, and in the case of a relatively large earthquake, it is possible to prevent the multifunction device 50 from toppling over by suppressing the movement to be smaller than the vibration amplitude.

  In particular, the movement limiter 10 of the present invention has a flat surface rather than a curved surface 17 on which the wheel 54 rides, so what kind of impact varies variously depending on the magnitude of the earthquake vibration or long-period vibration? Even if it exists, since the riding surface part 17 receives the load of the multi-function device 50 stably, it is possible to control and stabilize the force of the frictional resistance against the force of the collision.

  Further, regarding the configuration of the hinge portion 18 and the connecting portion 19, the movement restricting device 10 of the present invention can be attached and detached without lifting or moving the multifunction device 50 having a weight of 80 kg or more even if it is relatively small. Therefore, a slight movement during maintenance of the multi-function device 50 does not obstruct or inconvenience.

  The limitation on the movement of the multi-function device 50 as a device by the movement limiting tool 10 of the present invention having the above-described configuration will be described below with reference to FIG. 4A is a view showing a state in which the movement restricting device 10 of the present invention is attached (installed), FIG. 4B is a view showing a state in which the wheel 54 rides on the inclined portion 17b, and FIG. It is a figure which shows the state which the wheel 54 rides on the plane part 17a, and is colliding with the enclosure part 14. FIG.

  As shown in FIG. 4A, in the state in which the movement restricting device 10 is installed on the wheel 54 as the leg tip portion, the inner contact surface 58 on the wheel 54 side of the inclined portion 17b is exposed on the wheel contact surface. It will be placed on the exposed part.

  In the state of FIG. 4A, a vibration caused by an earthquake or the like acts on the multi-function device 50. For example, when the multi-function device 50 moves to the right side in the direction of the arrow shown in FIG. It moves to the right and comes into contact with the inclined portion 17b, and further rides on the riding surface portion 17.

  Next, when the wheel 54 further moves to the right side of the page and completely rides on the flat surface portion 17a, the movement limiter 10 receives the load of the multi-function device 50. When the state further moves to the right side of the sheet from this state and becomes the state of FIG. 4C, the movement restricting tool 10 receives (supports) all the loads from the multi-function device 50 in a stable state, and the enclosure part 14. It will receive impact force due to the vibration of the earthquake. As a result, the frictional resistance force that opposes the collision force is easy to control and can be stably generated.

  As described above, the movement limiter 10 of the present invention reliably prevents the device from tipping over regardless of the impact force that changes variously due to the magnitude of the earthquake vibration or the long-period vibration. It is possible to limit inadvertent movement.

<Second embodiment>
Hereinafter, a second embodiment of the movement restricting device 10 according to the present invention will be described with reference to FIG. Note that the description of the same components as those in FIGS. 1 to 4 is omitted by using the same reference numerals.

  FIG. 5 is a partial sectional side view showing the movement restricting tool 10 of the second embodiment. The difference between the second embodiment shown in FIG. 5 and the first embodiment described above is that the flat surface portion 17 a provided on the riding surface portion 17 has a slight angle with respect to the installation surface 58.

  The movement restricting device 10 in the second embodiment is easy to control by providing the flat surface portion 17a on the riding surface portion 17 described in the first embodiment, and maintains the effect of generating a stable frictional resistance force. It is possible to obtain an effect that the wheel 54 as the tip portion naturally returns to the exposed portion of the installation surface inside the inclined portion 17b.

<Third embodiment>
Hereinafter, a third embodiment of the movement restricting device 10 of the present invention will be described with reference to FIG. Note that the description of the same components as those in FIGS. 1 to 4 is omitted by using the same reference numerals.

  FIG. 6 is a partial cross-sectional side view showing the movement restricting tool 10 of the third embodiment. The difference between the third embodiment shown in FIG. 6 and the first embodiment described above is that the impact absorbing portion 16 is provided between the enclosure portion 14 and the wheel 54 as the leg tip portion.

  The shock absorbing portion 16 is an elastic body such as natural rubber, a porous polymer material, or a spring material such as a leaf spring, and is a plane portion that is inside the enclosure portion 14 on the wheel 54 side in the enclosure portion 14. It is provided on the surface of 17a.

  The shock absorber 16 absorbs the collision force when the wheel 54 collides with the enclosure 14 due to the vibration of the earthquake, so that the device is required to reduce the shock as much as possible, such as a server rack with casters. It is valid.

  In the description of the first to third embodiments, a multifunction machine having casters as legs is used as an example of the equipment. However, the present invention is not limited to this. The present invention can also be applied to various types of furniture used as a part.

  Further, regarding the collision state in which the leg tip portion described in the first to third embodiments rides on the flat portion and collides with the enclosure portion, when the leg tip portion is a caster, the surface of the plane portion and the other of the enclosure portion If the distance (height of the enclosure) between the upper surface on the side of the surface is set to be equal to or greater than the radius of the wheel of the caster, the possibility that the wheel gets over the upper surface on the other surface side of the enclosure is reduced. Therefore, it is possible to control the frictional resistance force more stably.

  As described above, the movement restricting tool 10 of the present invention makes it possible to obtain the effect of restricting inadvertent movement while reliably preventing the device from falling and reducing the impact force received by the device.

10 .. Movement limiter, 11 .... one side, 12 .... friction part, 13 .... side of other side, 14 .... enclosure part, 15 .... enclosure part reinforcing part, 15a ... enclosure part fixing screw , 16 .. Shock absorbing part, 17 .. Riding surface part, 17 a .. Flat part, 17 b .. Inclined part, 18 .. Hinge part, 19 .. Connecting part, 19 a .. Connecting projection part, 19 b. , 19c .. Auxiliary connection protrusion, 19d .. Auxiliary connection receiving part, 50.

Claims (6)

A movement restriction device for restricting movement of a device placed on an installation surface via a leg, wherein one surface abuts on the installation surface and is provided on the other surface side, and the leg is a front An enclosure that surrounds the periphery of the leg tip portion that contacts the placement surface; and a riding surface portion that is provided on the leg tip portion side of the enclosure and on which the tip of the leg tip portion rides,
The enclosure is divided into two half-cylinders in a direction parallel to the axial direction, and is closed with a hinge part 18 that connects the two half-cylinders in an in-plane direction perpendicular to the axial direction. And an upper end surface on the other surface side of the enclosure portion is provided with an enclosure reinforcement portion .   The connection portion is composed of a connection projection portion 19a made of a claw-like member that is elastically deformed and has a projection portion at the tip, and a connection receiving portion 19b that is a recess into which the projection portion is fitted. Item 3. The movement restriction tool according to item 1.   The movement restricting device according to claim 1, wherein the riding surface portion includes a flat portion that is parallel to the installation surface.   The movement restricting device according to any one of claims 1 to 3, wherein an edge portion of the riding surface portion is provided with an inclined portion toward the installation surface.   The movement restricting device according to any one of claims 1 to 4, wherein a friction portion is provided on one surface of the enclosure portion. The movement restricting device according to any one of claims 1 to 5 , further comprising an impact absorbing portion between the enclosure portion and the leg tip portion.

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