JP2005163393A - Movable supporting base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable supporting base having a caster coming on and off by more simple operation than before while ensuring stability when it is installed. <P>SOLUTION: The movable supporting base 1 comprises a base unit 2 having the caster 21 on the bottom and a lifting and lowering unit 3 equipped with a cover 31 surrounding the base unit 2. The lifting and lowering unit 3 is suspended from the base unit 2 through a certain load spring 25 held in the approximately central part of the base unit 2. The lifting and lowering unit 3 is guided and held to the base unit 2 within a range of fixed dimension by a lifting and lowering guide device consisting of a lifting and lowering guide cylinder 24 provided to the base unit 2 and a lifting and lowering pillar 34 inserted into the lifting and lowering guide cylinder 24 mounted to the lifting and lowering unit 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multi-purpose type movable support.

  There are known multi-purpose type support stands that are used in outdoor public places, for example, as car stops, pedestrians, or as benches or ashtray stands. This support base is formed in a height of about several tens of centimeters, and is used in such a manner that a single unit is installed at an arbitrary place or a plurality of bars are arranged at appropriate intervals and a bar or a chain is bridged. Such a support base is formed with a weight of about several tens of kilograms so that it does not easily fall over due to wind pressure or impact, or an unrelated third party moves without permission. It is illustrated.

  However, this kind of support base is not fixed to the place, but is placed at any place as necessary, so when it becomes unnecessary or when the place is changed, The support platform must also be easy to move. However, it is extremely difficult for a person to lift and carry a support stand weighing several tens of kg.

Therefore, in order to achieve both stability at the time of installation and ease of movement, there is a movable support base that has a caster for movement attached to the bottom surface of the base part, and the caster is made to appear on the bottom side as necessary. It has been proposed (for example, Patent Document 1).
JP-A-8-207506

  When moving, the movable support base described in Patent Document 1 lifts the outer shell (support base frame) above the base by hand or tilts the support base a little while simultaneously operating the lock mechanism. The casters are configured to protrude downward. However, as described above, when the support base and the outer shell body have a considerable weight, it is not easy to lift the outer shell body or tilt the support base. In particular, at a site where this type of support is used, elderly guards are often in charge of the work, and therefore, there is a strong demand for reducing the burden of installing and moving the support.

  Therefore, an object of the present invention is to provide a movable support base that can allow the caster to appear and disappear with a simpler operation than before, while ensuring stability during installation.

  In order to solve the above-mentioned problems, a movable support base of the present invention includes a base unit having a moving caster on a bottom surface and a lift unit provided with a cover surrounding the base unit. It is suspended from the base unit via a spring member held on the unit side, and is a cylindrical lift guide tube provided on the base unit side, and is attached to the lift unit side and is installed in the lift guide tube. The elevating unit is held by the elevating and lowering guide device including the elevating pillar inserted rotatably so as to be movable up and down within a certain size range with respect to the base unit.

  Furthermore, the movable support base of the present invention is provided with a guide groove formed on a side surface of the lift guide cylinder and a guide pin that is attached to a side surface of the lift pillar and engages with the guide groove. The guide groove has a vertically long vertical portion corresponding to the lift stroke length of the lift unit, and upper and lower locking portions extending in the lateral direction from both upper and lower ends of the vertical portion.

Furthermore, the movable support base of the present invention is characterized in that the lower end locking portion of the guide groove is formed to be inclined downward in a direction away from the vertical portion. The platform is provided with a rotary motion transmission mechanism at the upper end of the lifting pillar, an operating rod is extended to the side via this rotary motion transmission mechanism, and the end of the operating rod is exposed to the side surface of the lifting unit to raise and lower the platform. In the movable support stand of the present invention, the spring member is a roll-shaped constant load spring, wherein the lift unit can be moved up and down by rotating the lift pillar from the outside of the unit. It is characterized by being.

  In the mobile support base of the present invention, the lift unit is suspended from the base unit via a spring member and is held up and down by the lift guide device, so that the mobile support base itself can be lifted or tilted. Even if it does not, the caster for a movement can be made to appear and disappear from a bottom part by raising / lowering a raising / lowering unit along a raising / lowering guide apparatus. This facilitates the work of placing or moving the lifting unit at a predetermined position and reduces the burden on the operator.

  Embodiments of the present invention will be described below with reference to the drawings.

  1-4 is a figure which shows the whole internal structure of the movable support stand 1 which concerns on embodiment of this invention, Comprising: FIGS. 1-2 is a movable state, FIGS. Each deferred state is shown.

  The illustrated movable support 1 has a substantially cylindrical shape with an overall height of about several tens of centimeters, and is structurally covered with a base unit 2 having a moving caster 21 on the bottom surface and the base unit 2. Thus, it is distinguished from a lifting unit 3 that moves up and down about several cm with respect to the base unit 2.

  The base unit 2 includes a substantially disc-shaped base bottom plate 22 to which several casters 21 are attached, a substantially box-shaped spring support portion 23 provided at the center of the upper surface of the base bottom plate 22, and a spring support portion. And a cylindrical elevating guide cylinder 24 erected at the center of the top surface of 23. Two roll-shaped constant load springs 25 are attached to the spring support 23 in parallel with the rotation axis horizontal, and are fixed from spring extraction windows 26 formed on the front side and the back side of the spring support 23. Each drawing end of the load spring 25 is drawn downward. The hoisting force of the two constant load springs is set to be about 5 to 20 kgf larger than the weight of the lifting unit 3.

  On the other hand, the elevating unit 3 includes a cover 31 constituting an outer shell portion, a cover bottom plate 32 attached to the lower portion of the cover 31, a substantially portal-like elevating pillar support frame 33 attached to the cover bottom plate 32, and an elevating pillar. A column-shaped lifting pillar 34 held at the center of the support frame 33 is provided.

The cover 31 has a cylindrical side surface and a flat top surface, and the bottom surface is open. The vicinity of the lower portion of the cover 31 is coupled to the peripheral edge portion of the cover bottom plate 32 via an appropriate connecting member 35 attached to the inside of the cover 31. A protective material 36 made of synthetic rubber or synthetic resin is attached to the hem edge of the cover 31.

  The cover bottom plate 32 is a disk-like member having a substantially rectangular opening (not shown) in the center, and the base plate 2 is inserted into the opening from the lower side with the spring support portion 23 of the base unit 2 inserted from below. Arranged above the bottom plate 22. In the vicinity of the opening, a spring connecting plate 37 is attached so as to face the spring support portion 23 of the base unit 2, and this spring connecting plate 37 is connected to the drawing end of the constant load spring 25. . As a result, the entire lifting unit 3 is suspended from the spring support 23 of the base unit 2 with a constant force by the hoisting force of the constant load spring 25.

  The lifting pillar support frame 33 is fixed to the upper surface of the cover bottom plate 32 so as to straddle the spring support portion 23 of the base unit 2. A substantially cylindrical lift pillar 34 is rotatably attached to the top surface portion 331 of the lift pillar support frame 33 via a bearing member 332, and the lower part of the lift pillar 34 is located above the lift guide cylinder 24 of the base unit 2. Has been inserted from.

  A bearing base 333 is provided on the top surface portion 331 of the elevating pillar support frame 33, and an operating rod 38 extending in a substantially horizontal direction is held on the bearing base 333. One end of the operating rod 38 is connected to the upper end of the elevating pillar 34 via a rotational motion transmission mechanism using a bevel gear 39 so that the rotational motion of the operating rod 38 is transmitted to the elevating pillar 34 by changing its direction to a right angle. It has become. The other end of the operation rod 38 is exposed from an operation hole 311 provided on the side surface of the cover 31 of the elevating unit 3, and the end surface is exposed to an appropriate tool such as a slot, a hexagonal hole, or a cross groove. Processing is performed so that the operation rod 38 can be rotated. The gear ratio of the bevel gear is set to about the operating rod side: lift pillar side = 1: 3 so that the operator can rotate the lift pillar 34 with a light force.

  FIG. 5 is an enlarged view showing details of the lifting guide device including the lifting guide cylinder 24 on the base unit 2 side and the lifting pillar 34 on the lifting unit 3 side.

  The elevating guide cylinder 24 has a flange 241 at the lower end, and this flange 241 is fixed to the top surface of the spring support portion 23 with bolts and nuts. The inner surface of the elevating guide cylinder 24 is a right cylindrical surface.

  On the other hand, the elevating pillar 34 includes a large diameter portion 341 inserted into the elevating guide tube 24 and a small diameter portion 342 extending above the large diameter portion 341, and a bearing member 332 is attached to the small diameter portion 342. ing. Further, a nut member 335 for preventing the bearing member 332 from pulling upward is attached above the small diameter portion 342 of the elevating pillar 34. As a result, the lifting pillar support frame 33 and the cover 31 and cover bottom plate 32 coupled to the lifting pillar support frame 33 are supported by the lifting pillar 34 and are rotatably supported around the lifting pillar 34.

  A guide pin 40 is attached to the lower side surface of the large-diameter portion 341 of the elevating pillar 34 so as to penetrate the elevating pillar 34 in the diametrical direction and protrude on both side surfaces. The guide pin 40 is engaged with a guide groove 27 formed on the side surface of the lifting guide cylinder 24. The guide groove 27 has a vertical portion 271 that extends in the vertical direction, and an upper end locking portion 272 and a lower end locking portion 273 that extend in opposite lateral directions from the upper and lower ends of the vertical portion 271. Further, in the illustrated form, a cylindrical guide pin retaining collar 29 is inserted in the lower half of the outside of the lifting guide cylinder 24.

  FIG. 6 is a view showing a state in which the guide groove 27 of the elevating guide cylinder 24 is developed sideways. The length A of the vertical portion 271 is set to about 2 cm to 4 cm, and this length corresponds to the lifting stroke length of the lifting unit 3. Further, the upper end locking portion 272 and the lower end locking portion 273 are extended so that the central angles B and C around the axis are about 45 degrees to 60 degrees, respectively. The upper end locking portion 272 locks the position of the guide pin 40 when the lifting pillar 34 is raised, and the lower end locking portion 273 locks the position of the guide pin 40 when the lifting pillar 34 is lowered. In the illustrated embodiment, the lower end locking portion 273 is formed to be inclined downward by about several mm toward the direction away from the vertical portion 271. According to this embodiment, the lift guide cylinder 24 is moved upward by the downwardly inclined dimension D by rotating the lift pillar 34 from the state where the lift unit 3 is pushed down and the guide pin 40 is brought into contact with the lower end of the vertical portion 271. Can be raised. Then, the entire base unit 2 connected to the lifting guide cylinder 24 is lifted and the moving caster 21 is lifted, so that stability in a stationary state is improved.

  The handling method of the movable support 1 is as follows. When installed at a predetermined position, firstly, from the side of the cover 31, an appropriate tool is hooked on the end face of the operation rod 38 exposed in the operation hole 311 and the operation rod 38 is rotated, whereby the lifting pillar 34 is moved. And the guide pin 40 is moved to the upper end of the vertical portion 271 of the guide groove 27. Then, the weight is applied to the cover 31 and the lifting unit 3 is pushed down. When the guide pin 40 comes into contact with the lower end of the vertical portion 271 of the guide groove 27, the lifting pillar 34 is further rotated to move the guide pin 40 along the lower end locking portion 273 of the guide groove 27. Thus, the lower end of the elevating unit 3 comes into contact with the installation surface, the moving caster 21 is lifted, and the movable support base 1 is placed.

  On the other hand, when moving the movable support 1, the operating rod 38 and the lifting pillar 34 are rotated in the opposite direction to the above-described stationary operation. Then, the elevating unit 3 naturally rises due to the hoisting force of the constant load spring 25. Therefore, when the guide pin 40 comes into contact with the upper end of the vertical portion 271 of the guide groove 27, the elevating pillar 34 is further rotated to guide the guide pin 40. Is moved along the upper end locking portion 272 of the guide groove 27. Thus, the elevating unit 3 is fixed in the raised state and can be moved by the moving caster 21.

  As described above, according to the present invention, the elevating unit 3 is suspended from the base unit 2 via the constant load spring 25 and is held up and down by the elevating guide device. It is not necessary to lift or tilt the movable support 1 itself, and it can be easily operated.

  Note that the movable support base 1 of the present invention is not limited to the above-described embodiment, and can be implemented in the following modifications.

  Without using the operation rod 38 or the rotational motion transmission mechanism, the lifting pillar 34 can be extended right above so that the upper end is exposed from the top surface of the cover 31, and the lifting pillar 34 can be rotated directly from above the cover 31. It may be.

  Further, a lid or a key may be attached to the operation hole 311 formed in the cover 31 in order to prevent mischief or the like with respect to the end surface of the operation rod 38 exposed to the outside of the cover 31 or the end surface of the lift pillar 34.

  As means for suspending the elevating unit 3 from the base unit 2, a coil spring or other appropriate spring member can be used instead of the constant load spring 25 that can obtain a constant hoisting force.

  As for the rotational motion transmission mechanism, a universal joint or other appropriate mechanism can be adopted instead of the bevel gear. However, it is more preferable to use a mechanism that can ensure the same gear ratio (reduction ratio) as the above-described bevel gear (for example, a worm gear).

It is a front view which shows the internal structure (movable state) of the movable support stand concerning embodiment of this invention. Similarly, it is a left side view. It is a front view which shows the internal structure (stationary state) of the said movable support stand. Similarly, it is a left side view. It is a detail enlarged view of the raising / lowering guide apparatus in the said embodiment. It is an expanded view of the raising / lowering guide cylinder in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile support stand 2 Base unit 21 Caster 24 Lifting guide cylinder 25 Constant load spring (spring member)
27 Guide groove 271 Vertical portion 272 Upper end locking portion 273 Lower end locking portion 3 Lifting unit 31 Cover 34 Lifting pillar 38 Operating rod 39 Bevel gear (rotational motion transmission mechanism)
40 guide pins

Claims (5)

It consists of a base unit having a moving caster on the bottom surface and a lifting unit provided with a cover surrounding the base unit,
The lifting unit is suspended from the base unit via a spring member held on the base unit side,
The lifting unit includes a cylindrical lifting guide tube provided on the base unit side, and a lifting guide device provided on the lifting unit side and rotatably inserted into the lifting guide tube. A movable support stand that is held up and down within a certain size range with respect to a base unit. The lifting guide device includes a guide groove formed on the side surface of the lifting guide cylinder, and a guide pin that is attached to the side surface of the lifting pillar and engages with the guide groove.
The said guide groove has the vertically long vertical part corresponding to the raising / lowering stroke length of an raising / lowering unit, and the upper and lower latching | locking part extended in a horizontal direction from the up-and-down both ends of this vertical part. Mobile support base. The movable support base according to claim 2, wherein the lower end locking portion of the guide groove is formed to be inclined downward in a direction away from the vertical portion. A rotary motion transmission mechanism is provided at the upper end of the lifting pillar, an operating rod is extended to the side via this rotational motion transmission mechanism, and the end of the operating rod is exposed to the side surface of the lifting unit, thereby The movable support base according to claim 1, wherein the lifting / lowering unit can be lifted / lowered by rotating the lifting / lowering pillar. The movable support base according to claim 1, wherein the spring member is a roll-shaped constant load spring.

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