JPH0321609Y2 - - Google Patents

Description

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

This invention mainly relates to an improvement of a foldable structure used as a portable stage.

[Conventional technology]

For example, as a center-folding type folding structure,
As in No. 50364, a pair of left and right frames that are folded in an approximately inverted shape or unfolded in the same horizontal plane are pivotally attached to the left and right sides of a central support body having legs, and
A support leg is pivotally attached to the front end side of the frame, and the support leg is connected to a central support body to rotate and displace the support leg from a hanging position to a parallel position of the frame in conjunction with the unfolding or folding operation of the frame. A configuration in which a link member is provided is known. In addition, a configuration is known in which a U-shaped connecting member is used to pivot the central support and the frame, and a tapered surface is provided on the top plate, as in the folding table of Utility Model Publication No. 10005. .

[Problem that the invention attempts to solve]

However, in a stage with such a configuration, when the top plate is unfolded, the back side of the top plate is only connected and supported by the upper end of the central support, so there is play between the center support and the top plate, and the top plate As a result, there is also a gap between the opposing surfaces of the . For this reason, when the stage is unfolded, the opposing ends of the adjacent top plates are offset from each other, resulting in a stepped portion, which poses a quality problem that causes trouble when the stage is used. This idea was made in order to solve the above problem, and in order to avoid gaps between the unfolded top plates, the opposing surfaces of the central top plate and the movable top plate are tapered so that they are substantially on the same plane. In addition to forming a surface, there is also a gap (step) so that the base end side of the movable top plate, on which the tapered surface is formed, can be supported on the top surface of the central support so that the zenith surfaces of both are held on the same plane. It is an object of the present invention to provide a half-folding type folding structure that does not cause play during formation.

[Means to solve the problem]

In order to achieve the above-mentioned object, this invention pivots a pair of left and right top support frames that are folded in an approximately inverted shape or unfolds in the same horizontal plane on both left and right sides of a central support body having legs, and A support leg is pivotally attached to the tip side of the plate support frame, and the support leg is connected to the central support body, and the support leg is moved from the hanging position of the top plate support frame to the hanging position of the top plate support frame in conjunction with the expansion or folding operation of the top plate support frame. In a center-folding type folding structure provided with a link member that is rotatably displaced to a parallel position, (a) a gap is provided at both left and right ends of the upper surface of the central support, and left and right side end walls that form the step portion thereof; (b) A central top plate is formed and fixed to a first tapered surface that gradually slopes upward. A second tapered surface is formed that corresponds to the tapered surface and immediately collides with the tapered surface, and when unfolded, it is placed between the steps of the upper surface of the central support and forms the same zenith surface as the central top plate. (c) A top plate support frame or a movable side top plate is provided on both sides of the center support or the center top plate, and the top plate is folded with a vertically movable connecting member that spans the back side of each top plate.・It is a technical means of pivoting so that it can be deployed.

[Effect]

When the movable side top plate in the folded upright state is unfolded and rotated, the base end of the movable side top plate is placed and supported on the step formed on the top surface of the center support in the unfolded position, so it cannot move up and down. No rattling occurs. Additionally, a second tapered surface is formed at the base end of the movable top plate, and abuts against the first tapered surface of the center top plate fixed to the center support. Since the first and second tapered surfaces are substantially the same surface, there is no gap between them. Since the central support and the top plate support frame are pivotally connected via a connecting member that straddles and connects them on the back side, the top plate support frame or the movable top plate can be moved without affecting the above-mentioned abutment. Can be folded or unfolded.

【Example】

Hereinafter, preferred embodiments of this invention will be described based on the drawings. The portable stage illustrated in FIGS. 1 to 3 as a folding structure of a folding type is provided with a central support 1 for supporting the folding side thereof. The central support 1 in the illustrated example has a framework structure, and a caster 2 and a height-adjustable foot member 3 are provided at the lower part thereof, and integrally protrudes outward at a spaced apart position above the caster 2. It has a horizontally oriented bracket 4. A central top plate 5 is integrally stretched over the upper surface of the central support 1. A stepped portion 6 is formed on both sides of the upper surface of the central support body 1, and is formed by the gap on the upper surface and the side end walls of the central top plate 5. Both side end surfaces of the central top plate 5 are formed as first tapered surfaces 5a (see FIGS. 1, 3, and 4) whose upper side portions are gradually narrowed in width. Further, on both sides of the central top plate 5, there are provided hole chambers 5b (see FIG. 4) whose lower surfaces are open near the first tapered surface 5a. In this hole chamber 5b, an upward bracket 7 is housed, which is integrally projecting from the upper surface of the central support 1 by means of welding or the like. A base end portion of a rotating arm 8 is pivotally supported on this bracket 7 by a pin P1 so as to be vertically movable. The free end of the rotating arm 8 is connected to a pair of left and right top plate support frames 9 arranged on both sides of the central support 1 by means such as welding. More specifically, the rotating arm 8
serves as a means for connecting the movable side top plate 10 stretched over the top plate support frame 9 and the central top plate 5, and in the case of the illustrated example, it is integrally formed with a substantially U-shaped cross section and is connected to each top plate. It straddles the back sides of the plates 10 and 5. On the other hand, the surface of the movable side top plate 10 facing the center top plate 5 has a first tapered surface 5a on the side of the center top plate 5.
A second tapered surface 10a is formed so that the second tapered surface 10a is substantially the same surface so as to be joined quickly. The outer end side of the frame 9 has a folding support leg 11.
(See Figures 1 to 3). The upper ends of the supporting legs 11 are rotatably supported on the outer end side of the frame 9 by pins P2. Further, as shown in FIG. 2, the supporting legs 11 are connected to each other by a horizontal member 12. A handle 1 for operating the top plate is provided at each middle part of the horizontal member 12.
3 are connected together. The illustrated handle 13 is a U-shaped bent rod that hangs down when the frame 9 is in the unfolded position. Each support leg 11 is connected between its midway portion and the horizontal bracket 4 of the central support body 1 by a link bar 14 via pivot pins P3 and P4. In this case, the link bar 14 is horizontally suspended between the supporting leg 11 and the horizontal bracket 4 so as to be inclined gradually downward toward the supporting leg 11 side. As shown in FIG. 3, the movable top plate 10 is provided with locking means 16 on its back surface for locking the top plate and the frame 9 together in the folded position. The illustrated locking means 16 has a bracket 17 fixed to the back surface of each movable top plate 10 at a position corresponding to the handle 13 when the top plate is folded. As shown in more detail in FIGS. 5 and 6, the bracket 17 is comprised of a channel-shaped member having bracket pieces 17A and 17B on both sides. Lock members 1 are attached to the bracket pieces 17A and 17B.
8 is rotatably supported via a pin P5. The locking member 18 is made of a bent plate, and includes a locking piece 18A that presses and chucks the horizontal rod part of the handle 13 against each back side of the movable top plate 10 when the top plate is folded. A guide piece 18 that extends outward from the tip of the hook piece and slopes downward.
B, and a bent piece portion 18C formed on the distal end side of this guide piece portion. The locking member 18 is moved by a spring member 19 in the direction in which the locking piece 18A chucks the handle 13.
(see Fig. 6). Next, the operation of the above embodiment will be explained. When the top plate 10 or the outer end side of the frame 9 is lifted from the stage unfolded state shown in FIG. 1, the frame 9 rotates upwardly around the pivot pin P1 in the hole chamber 5b. At the time of the rotation, the link bar 14 follows and rotates in the upward direction about the pivot pin P4 on the central support body 1 side. In this case, the pivot pin P3 on the support leg 11 side of the link bar 14 is the base end pivot pin P3 of the link bar 14.
4, each support leg 11 is folded in a direction along the back surface of the movable top plate 10 around the pivot pin P2 on the frame 9 side, as shown in FIG. During the folding process, when the handle 13 approaches the back surface of the movable top plate 10, the horizontal bar portion at the tip of the handle rides on the guide piece 18B of the lock member 18. As a result, the handle 13 rotates the lock member 18 against the spring member 19 while locking the guide piece 1.
Get over 8B. Then, the locking member 18 is rotated to its original position by the force of the spring member 19, so that the locking piece 18A is attached to the handle 13.
Chatting. Therefore, the movable top plate 10 and the frame 9 are automatically locked at the same time as they are folded into the upright state shown in FIG. Therefore, there is no danger that the movable top plate 10 and the frame 9 will fall down in the folded state, and they are held reliably and with good stability. Next, when unfolding the folded stage, the handle 13 is unlocked by rotating the locking member 18 against the spring member 19. Therefore, if the movable side top plates 10 are opened mutually,
Together with the link bar 14, each of the supporting legs 11 is rotated and unfolded in a direction opposite to that when the stage is folded. At the same time, the movable top plate 10 is unfolded horizontally, and in the unfolded position, the stepped portion 6 on the central support 1
At the same time, the second tapered surface 10a of the movable top plate 10 is supported, and at the same time, the second tapered surface 10a is immediately joined to the first tapered surface 5a of the center top plate 5. With this, the movable side top plate 10 is moved to the center side top plate 5.
It is held in the same horizontal plane for a while. Further, in the above embodiment, the pivot point P1 on the central support body 1 side of the frame 9 is located within the hole chamber 5b.
That is, since it is set within the thickness of the central top plate 5, the second tapered surface 10a on the movable side top plate 10 can be smoothly joined and separated from the first tapered surface 5a of the central top plate 5. Note that the folding structure of this invention is not limited to the portable stage as in the above embodiment, but may be other types of folding tables, for example, and may be modified in various ways without changing the gist. It can be implemented by

[Effect of the idea]

As described above, according to this invention, in the unfolded position of the top plate, the second tapered surface side of the movable top plate is provided on the top surface of the central support and forms a step with the first tapered surface of the central top plate. Since it is placed and supported, there is no vertical play. Furthermore, at the same time, the second tapered surface at the base end of the movable side top plate and the first tapered surface of the center top plate abut each other, and since these are substantially the same surface, there is a gap between them. Does not occur. Therefore, when the top plate is unfolded, it is possible to reliably prevent the mutual rattling between the central support and the top plate, so there is no difference in level between the mutually opposing ends of the unfolded top plate, and the top plate Stability during deployment can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a portable stage according to a preferred embodiment of this invention in an unfolded state, Fig. 2 is a side view of the same, Fig. 3 is a partially cutaway front view of the portable stage in a folded state, and Fig. 4. 5 is a front view of the bracket of the locking means, and FIG. 6 is a side view of the locking means. 1...Central support, 5...Central top plate, 5a...
First tapered surface, 8... Connection member, 9... Top plate support frame, 10... Movable side top plate, 10a... Second
Tapered surface.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of left and right top support frames that are folded in an approximately inverted shape or unfolded in the same horizontal plane are pivotally attached to the left and right sides of a central support body having legs, and A support leg is pivotally attached to the tip side of the top support frame, and the support leg is connected to the central support body, and the support leg is moved to the hanging position of the top support frame in conjunction with the unfolding or folding operation of the top support frame. In a center-folding type folding structure provided with a link member that is rotatably displaced to a parallel position, a gap is provided at both left and right ends of the upper surface of the central support, and the left and right side end walls forming the stepped portion are arranged upward. a central top plate formed and fixed to a first tapered surface that gradually slopes toward the center; a movable side top plate that forms a second tapered surface that comes into contact with each other immediately, and is placed between the steps of the upper surface of the central support when deployed, and forms the same zenith surface as the center top plate; , the base end is pivotally supported on both sides of the central support or the central top plate so as to be vertically movable, and the distal end is connected to the back side of the frame or the movable side top plate, so that the movable side top plate is connected to the center A center-folding type folding device characterized by comprising a connecting member that supports the top plate so as to be rotatably displaced between a horizontal unfolded position and a folded position where the center-folded and upright state are adjacent to each other on the same plane. Tatami structure. (2) The central top plate has hole chambers formed within the plate thickness of both sides thereof and open on the lower surface side, and the base end of the connecting member is pivotally supported within the hole chamber, and the connecting member is connected to the hole. A utility model according to claim 1, which extends downward from the chamber, is bent toward the back side of the movable top plate, and is integrally connected to the back side and/or the top plate support frame. Half-folding structure.