JP4233011B2 - Retractable manual support column - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retractable manual support column to which a mounted object such as a projector, an antenna, or a television camera can be attached.
[0002]
[Prior art]
Various proposals have been made on the mechanism for raising and lowering a collapsible support column to which a mounted object such as a projector is attached, and provides lifting power to reduce the weight burden of the loaded object and facilitate the lifting operation. Some have a drive source such as a hydraulic cylinder.
[0003]
[Problems to be solved by the invention]
However, when a drive source is provided, the drive mechanism becomes complicated, and there is a limit to reducing the weight and size of the apparatus.
The present invention has been made in view of such a situation, and an object of the present invention is to provide a retractable manual support column that can be reduced in weight and size while ensuring ease of elevating operation.
[0004]
[Means for Solving the Problems]
The present invention is a tiltable manual support column capable of selecting a standing state and a descending state, a base fixed to an installation location, a mounting base capable of fixing a load, the mounting base and the base A link that connects the distances between the shafts with the same length, and allows the mounting base to rotate around the base while maintaining its posture by two legs arranged in parallel to each other. A mechanism portion, a damper that urges the link mechanism portion in a standing direction and maintains the standing state, and a space that is spaced apart from the base portion, and the link mechanism portion is lowered against the urging force of the damper A locking means for detachably locking the mounting base, and the two leg portions of the link mechanism portion are tilted in the axial direction from the standing state to the horizontal direction. during the descent state of the manual support posts, one leg There so that mutually pile on top of the other leg, the pivotally supported position of the one leg above, with respect to the axis supporting the position of the other leg, only the width of the leg during standing state , A retractable manual support column that is positioned above the base portion in the direction of the mounting base .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a retractable manual support pillar according to the present invention will be described based on the drawings.
As shown in FIG. 1, the retractable manual support column 1 according to this embodiment includes a base 2 fixed at an installation location, a mounting base 3 on which a pair of projectors 7 (mounting objects) are placed, and a base 2. And a link mechanism 4 that connects the mounting base 3 to each other.
As shown in FIGS. 1 to 3, the link mechanism 4 is a so-called four-joint link mechanism that can rotate the mounting base 3 around the base 2. That is, the opposite links are always parallel and the rotational angular velocity is the same as the other links. The link mechanism 4 allows the retractable manual support column 1 to be in a standing state (see FIG. 1) and a lowered state (see FIG. 3). Maintained.
[0006]
The link mechanism part 4 has a pair of leg parts 41 and 42, and each leg part 41 and 42 is pivotally supported by the base part 2 by the pivotal support parts 41a and 42a, and each upper end is pivoted by the pivotal support parts 41b and 42b. The pedestal 43 is pivotally supported. The distance between the shaft support portion 41a and the shaft support portion 41b of the leg portion 41 is the same as the distance between the shaft support portion 42a and the shaft support portion 42b of the leg portion 42. That is, the distance between the pivots of the leg portions 41 and 42 is the same. However, the positions of the shaft support portions 41a and 42a of the leg portions 41 and 42 and the positions of the shaft support portions 41b and 42b are slightly shifted from each other in the axial direction. That is, the pivot position of the leg portion 41 is closer to the mounting base 3 by the length X than the pivot position of the leg portion 42. This length X is substantially the same as the width dimension of the leg portions 41 and 42. For this reason, as shown in FIG. 3, when the pair of leg portions 41 and 42 are brought down to fall, the axial direction of each leg portion 41 and 42 changes from the vertical direction to the horizontal direction (preferably substantially horizontal direction). The pair of leg portions 41 and 42 overlap each other. Therefore, the maximum height in the lowered state can be minimized.
[0007]
A gas damper 5 is attached to the intermediate part of the leg part 41 of the link mechanism part 4, and the tip of the rod 51 is attached to the base part 2. The gas damper 5 pushes out the rod 51 by a reaction force of gas, and when attached, the gas damper 5 biases the leg portion 41 in an upright direction. That is, when the rod 51 is pushed out and fully extended, the link mechanism 4 is in an upright state. On the other hand, when the rod 51 is pushed against the urging force, the link mechanism 4 is lowered. The reaction force of the gas damper 51 may be determined as appropriate depending on the total weight of the mounting base 3, the projector 7, and the link mechanism 4, and the number of gas dampers 5 is not limited to one, and a plurality of them can be used. . Further, the stroke length of the gas damper may be determined as appropriate. Note that an oil damper (not shown) may be used instead of the gas damper 5.
[0008]
As shown in FIGS. 1 to 4, a lock portion 6 is installed apart from the base portion 2. As shown in FIGS. 3 and 5, the lock portion 6 is engaged with the pedestal 43 in the lowered state. That is, when the gas damper 5 is lowered against the reaction force, the pedestal 43 and the lock portion 6 are locked and the lowered state can be maintained.
A claw 61 is provided on the lock portion 6, and a lever 44 that can be engaged with the claw 61 is slidably provided on the base 43. Therefore, when the claw 61 of the lock portion 6 and the lever 44 of the link mechanism portion 4 are engaged in the lowered state, the link mechanism portion 4 can be held in the lowered state against the urging force of the gas damper 5 and stored. it can.
When the lever 44 is operated and the engagement with the claw 61 is released, the urging force of the gas damper 5 works so that the link mechanism portion 4 stands. For this reason, the projector 7 can be lifted with a slight force to maintain the standing state.
[0009]
Thus, in this embodiment, the light projector 7 can be easily lifted using the reaction force by which the rod 51 of the gas damper 5 is pushed out. Moreover, the structure is also simple and can be reduced in weight. Further, when the retractable manual support column 1 is mounted on a vehicle or the like (not shown), the storage state is lowered, so that the height can be kept low.
[0010]
【The invention's effect】
As is clear from the above description, the collapsible manual support column of the present invention is a collapsible manual support column that can be selected between a standing state and a lowered state, and a base that is fixed to the installation location; The base is centered by two legs that are connected in parallel to each other, with a mounting base that can fix the load, and a distance between the shafts of the mounting base and the base that is the same length. The mounting base is installed apart from the base portion, a link mechanism portion that can be rotated while maintaining its posture, a damper that biases the link mechanism portion in a standing direction and maintains the standing state, In order to hold the link mechanism portion in a lowered state against the urging force of the damper, the link mechanism portion includes a locking means that is detachably locked to the mounting base, and the two leg portions of the link mechanism portion are , horizontal direction from the standing state legs in the axial direction During descent state of the manual supporting Columns Fold, one for the legs is such mutual pile on top of the other leg, the pivotally supported position of the one leg above, pivotally supported in said other leg relative position, by the width dimension of the leg during standing state, is located above a said mount direction relative to the base, it is possible to lift the light projector or other payloads with little force, In addition, it has an excellent effect that the structure is simple and can be configured to be lightweight.
[Brief description of the drawings]
FIG. 1 is a front view of a retractable manual support column according to an embodiment of the present invention in a standing state.
FIG. 2 is a front view of the state in which the retractable manual support column of FIG. 1 is slightly tilted.
FIG. 3 is a front view of the retractable manual support column in FIG. 1 in a lowered state.
4 is a bottom view of a base portion and a lock portion viewed from an arrow IV in FIG. 3. FIG.
5 is a right side view of the retractable manual support column viewed from an arrow V in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retractable manual support pillar 2 Base 3 Mounting base 4 Link mechanism part 41, 42 Leg part 41a, 41b, 42a, 42b Shaft support part 43 Base 44 Lever 5 Gas damper 51 Rod 6 Lock part 61 Claw 7 Light projector X Length

Claims (1)

A collapsible manual support column that can be selected between a standing state and a lowered state,
A base fixed to the installation location;
A mounting base for fixing the load;
The mounting base and the base are connected to each other with the same distance between the shafts , and the two mounting parts are arranged in parallel to each other so that the mounting base is placed in the posture around the base. A link mechanism that can be rotated while maintaining;
A damper that urges the link mechanism portion in a standing direction and holds the standing state;
A locking means for detachably locking to the mounting base in order to hold the link mechanism portion in a lowered state against the urging force of the damper;
The two leg portions of the link mechanism portion are arranged such that one leg portion is placed on the other leg portion when the manual support column is lowered when the leg portion is tilted in the axial direction from the standing state to the horizontal direction. so that mutually Stack, the pivotally supported position of the one leg above, with respect to the axis supporting the position of the other leg, only the width of the legs during standing state, the attachment relative to said base A collapsible manual support column characterized by being positioned above the platform direction .

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