JPH0131073Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a folding type folding structure, and particularly to a structure in which the height can be adjusted by raising and lowering pillars on opposite sides of a split top plate.

[Conventional technology]

In the case of a center-folding structure in which the outer ends of a pair of split top plates that are split in the center are raised and folded, the pair of split top plate parts that make up the top plate are divided into two on the left and right. Therefore, when the top plate is unfolded, the heights of the left and right divided top plate parts are different, and there is a risk that the joint part will be stepped. Therefore, in order to set each of the divided top plate parts at a uniform height, that is, to set them on the same horizontal plane, it is necessary to raise or lower one of the opposing sides of the divided top plate parts. Therefore, as a height adjustment mechanism, a structure is known in which a stopper with a screw bolt structure that can be moved up and down is provided alongside the caster attached to the footrest, but when this structure is applied, the caster cannot be installed There was a drawback that it would rise above the current position and would not operate after height adjustment. Therefore, in order to move the center-folding folding structure, the height adjustment is canceled and the casters are brought into contact with the ground before being moved, so it is necessary to repeatedly adjust the height.

[Problem that the invention attempts to solve]

This idea was newly devised in view of the above-mentioned drawbacks, and its main problem is to support each divided top plate part on the pedestal while taking advantage of the function of the casters attached to the pedestal. A half-folding type folding structure is provided, in which a pair of inner pillars are provided, and the inner pillar has a double-tube structure and is screwed up and down to adjust the height of the opposite side of each divided top plate part. It is on offer.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention raises the outer ends of a pair of split top plate parts that are supported by inner pillars at the center and are pivotally connected. In a center folding structure that is folded in conjunction with the folding operation of the pivotally connected outer pillars, (a) the inner pillars support each divided top plate part and are connected in pairs so as to be pivotally connected; (b) The lower ends of the pair of inner pedestals are supported by the same horizontal pedestal with a caster on the ground side, and (c) the inner pedestals support a lifting shaft. It has a double-tube structure that is fitted into a tube, and (d) the upper end of the lifting shaft is pivotally connected to each split top plate to serve as a pivot point for folding, and the support tube is connected to the footrest. A technical measure is taken in which the shaft is fixed and held by a lifting mechanism so that it can be screwed up and down.

[Effect]

The elevating shaft of the inner pillar and the support tube are moved up and down by the elevating mechanism. This inner pedestal is attached to each split top plate, and the mounting position, which is the inner end on the opposite side of the split top plate, is raised and lowered, so there is a gap between the pedestal and each split top plate. can be expanded and contracted individually. As a result, even if the height is different from the opposing split top plate and there is a step, or if the opposing end and the outer end of the split top plate are not horizontal (same height), the difference can be raised and lowered to make the same height. A horizontal top plate can be formed. Further, as described above, since the space between the leg stand and the divided top plate portion expands and contracts, the caster fixed to the leg stand can maintain a grounded posture and can slide.

【Example】

A preferred embodiment of this invention will be described below based on the drawings. Center-folding structure 10 shown in FIGS. 1 to 5
is generally used as a stage, and a pair of split top plate parts 1 and 2 are fixed at the center, and outer pillars 9 are attached to the outer end sides 1B and 2B of the corresponding top plate support frames 1F and 2F. , 9 are pivoted to P3. In addition, on the inner end sides (opposite sides of the split top plate parts 1 and 2) 1A and 1B, pedestal inner tubes 3 and 3, which are an example of an elevating axis, are pivoted P1, and this pedestal inner tube 3 is It is fitted into an outer pedestal tube 4, which is an example of a support tube fixed to a pedestal 7, so as to be able to move up and down, forming a double tube structure. The center side of this folding type folding structure is able to slide on the ground by casters 8 via the leg stand 7. In addition, L in the figure is a link spanned between the outer pedestal 9 and the pedestal inner pipe 3 and pivoted P4 and P2, respectively, and connects the outer pedestal 9 to the divided top plate parts 1 and 2. When folded or unfolded, the storage position is changed in parallel to the storage position and the support position perpendicular to the divided top plate parts 1 and 2. Therefore, this center-folding type folding structure 10 has the outer ends 1B,
When the 2B side is lifted, the divided top plate parts 1 and 2 are folded into an upright shape using the pivot point P1 between each divided top plate part 1 and 2 and the pillar inner tube 3 as a fulcrum, and in conjunction with this, the outer side The pedestal 9 is displaced to the storage position as described above and assumes the folded position as shown in FIG. Conversely, when unfolding, the split top plate parts 1 and 2 are unfolded horizontally with the pivot P1 position as a fulcrum, and in conjunction with this, the outer pillar 9 is displaced to a supporting posture in which it stands upright, and It assumes a deployed attitude as shown in Figure 3. Next, an elevating mechanism 5 that is provided between the pedestal inner tube 3 and the pedestal outer tube 4 and moves the pedestal inner tube 3 up and down.
In the case of this embodiment, as shown in more detail in FIG. 1 and FIG. It consists of a partition board 53 having a hole in the partition board 53, and an adjustment bolt 51 whose shaft side passes through the hole in the partition board 53 and is screwed into the threaded hole 52 of the pillar inner tube 3. In addition, 54 in the figure is the pillar inner tube 4 of the adjustment bolt 51.
This is a stopper to prevent falling off from the partition panel 53, and in this embodiment, a nut is used. This elevating mechanism 5 uses the head of the adjustment bolt 51 as an operation part H, rotates in the circumferential direction of the adjustment bolt 51 via the operation part H, and rotates through the screw hole 52 screwed into the adjustment bolt 51. The pillar inner tube 3 can be moved up and down. As a result, even if there is a difference in level between the left and right divided top plate parts 1 and 2, by adjusting the height of one of the divided top plate parts, it is possible to set them on the same horizontal plane. In addition, the opposite side 1A of both split top plate parts 1 and 2,
2A can be raised and lowered to adjust it to a horizontal position with respect to the outer end sides 2A and 2B. Here, the pedestal inner tube 3 moves up and down along the inner wall of the pedestal outer tube 4, but the split top plate part may wobble due to the clearance (play) between the two, so the pressing tool 6 It is provided in the column outer tube 4. As shown in FIG. 6, in this pressing tool 6, a base portion 61 provided with a screw hole 62 that communicates with an opening 60 formed at a corner of the pedestal outer tube 4 is welded to the pedestal outer tube 4. A tightening screw 63 is screwed into a screw hole 62 of the base portion 61. Therefore, when the tightening screw 63 is rotated in the tightening direction, the tightening screw 63 threads through the screw hole 62 of the base portion 61, and its tip abuts against the corner outer wall of the pillar inner tube 3. do. Furthermore, by tightening, the pedestal inner tube 3 is pressed toward the corner of the inner wall of the pedestal outer tube 4, that is, the corner opposite to the corner where the opening 60 is formed, thereby preventing wobbling. . If the pillar inner tube 3 is moved up and down as described above in this state, the height of the divided top plate parts 1 and 2 can be adjusted in a stable state. In addition, in this invention, the inner pillar may have a double-tube structure that screws up and down, for example, as shown in FIG. Surfaces N1 and N2 are provided, and the base 7
A configuration may also be adopted in which the support tube 4' is fixed to the shaft 3', and the elevating shaft 3' extends downward and passes through the handle shaft H2 for rotational operation laterally. This elevating shaft 3' is rotatably supported by a bracket B which is pivotally connected to the top support frame at the upper end and also to the link L at the side. Therefore, when the elevating shaft 3' is rotated in the circumferential direction via the handle shaft H2, it is screwed up and down in the vertical direction due to the screw engagement with the support tube 4', and the top plate support frame or the divided top plate is raised and lowered via the bracket B. can be done. In this case, a rotary shaft corresponding to the support tube is rotatably supported in a circumferential direction on a footrest, and a lifting shaft corresponding to the lifting shaft is fitted onto the rotary shaft and pivotally attached to the top plate support frame. If the pipe is screwed onto the rotating shaft, the elevator pipe can be moved up and down by applying circumferential rotational force to the rotating shaft. In addition, this elevating mechanism has a configuration in which one of the double pipes or double shafts is connected to the foot stand, and the other is screwed to this so that it can be freely screwed up and down and pivoted on the split top plate side. It is fine as long as it is worn. In addition, if one of the double pipes is pivoted directly or fitted to the split top plate and moves up and down, and the other is connected to the footrest, which one rotates in the circumferential direction? It's okay.

[Effect of the idea]

Since this invention has the above-mentioned configuration, the height of the divided top plate parts themselves can be adjusted individually by expanding and contracting the inner pillars without changing the grounding position of the casters in any way. Further, even after the height adjustment is completed, the inner pillar is supported by the same foot stand, so it is possible to move it as is using the casters provided on the foot stand. Therefore, there is no need to cancel the height adjustment when moving after once adjusting it as in the conventional case, so there is no need to make frequent adjustments. Furthermore, since the lifting mechanism does not come into direct contact with the ground, it is not subject to a large load and reliability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing the elevating mechanism of the folding type folding structure according to this invention, Fig. 2 is a sectional view of the main part when the height is adjusted by the elevating mechanism, and Fig. 3
The figure is a front view showing the folding structure in its unfolded position, Fig. 4 is a side view thereof, Fig. 5 is a front view showing the folded structure, and Fig. 6 is a mounting portion of the pressing tool of this invention. FIG. 7 is a cross-sectional view of a main part showing a different embodiment of the elevating mechanism of this invention. 1, 2...Divided top plate part, 3, 3'...Pillar inner tube,
4, 4'...Pillar outer tube, 5...Lifting mechanism, 6...
Pressing tool, 7... Leg stand, 8... Caster, 9... Outer pillar, 10... Middle folding type folding structure.

Claims (1)

[Claims for Utility Model Registration] (1) Lifting the outer ends of a pair of split top plate parts that are supported and pivoted by inner pillars at the center, and In a center folding structure that is folded in conjunction with the folding operation of the pivotally connected outer pillars, the inner pillars are provided in pairs to support each divided top plate part and to be pivotally connected to each other. The lower ends of the pair of inner pedestals are supported by the same horizontally mounted pedestal with a caster on the ground side, and the inner pedestal is a double tube with a lifting shaft fitted into a support tube. The upper end of the elevating shaft is pivotally connected to each divided top plate to serve as a pivot point for folding, and the support tube is fixed to the footrest to move the elevating shaft up and down using the elevating mechanism. A mid-folding type folding structure characterized by being held so that it can be screwed forward and backward. (2) The center-folding structure according to claim 1, wherein the inner pedestal is provided with a pressing tool for pressing the elevating shaft against the inner wall of the support tube.