JPH0131072Y2 - - Google Patents

Description

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

This invention relates to a latching structure for a half-folding folding structure, and particularly to a structure for latching the outer ends of opposing split top plate portions so that they do not open when folded.

[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, when folded, the outer ends of each split top plate are on top and the center side is The folding position is such that they collide with each other while tilting. However, since the left and right divided top plate portions are not restrained by each other in any way, there is a risk that the divided top plate portions may come off in the deployment direction if force is applied in the deployment direction. In particular, when transporting, it is impossible to stack them horizontally, which makes it impossible to transport them efficiently.

[Problem that the invention attempts to solve]

This device was newly invented in view of the above-mentioned drawbacks, and the main problem is that the hook is built into the top plate support frame, and when folding, it is pulled out and the split top plate parts are folded together. It locks in the same position and reliably maintains the folded state.

[Means to solve the problem]

In order to solve the above-mentioned problem, this invention is divided at the center and fixed to a pair of pivot support frames, and the outer end side of the split top plate part is raised and the outer pedestals are folded. In a structure in which opposing split top plate parts are latched from the outside when folding a mid-fold type folding structure that is folded in conjunction with the (b) A retractable part made of a spring is built in the fixed top support frame and has a fixed base end; (b) The extendable part is connected to the tip of the retractable part and the base end is housed in the top support frame. When the top plate is folded, it is pulled out against the elastic return force of the expandable part, and the outer ends of the pair of opposing split top plate parts can be inserted and removed as one piece in the thickness direction, and are fitted from the outside with almost no gap. A U-shaped split top plate locking portion is provided. (c) A hook consisting of the above-mentioned expandable portion and the split top plate locking portion is provided. (d) The back side of the opposing split top plate portion. A technical measure is taken in which a receiving part is formed to restrain the tip of the split top plate part locking part.

[Effect]

When folding, the extendable part of the latching tool is stretched against the elastic return force to pull out the split top plate part locking part from the top plate support frame to the lock position, and the pair of parts facing each other at the split top plate part locking part are pulled out from the top plate support frame to the lock position. The outer end sides of the split top plate portions are integrally fitted from the outside in the thickness direction without substantially any gap. The tip of this split top plate locking part is restrained by the receiving part, and the split top plate is held in the folded position and cannot move in the unfolding direction. When not restrained, when the split top plate locking portion is removed from the receiving portion or the split top plate portion, the base end side returns to the top plate support frame by the biasing force of the extensible portion.

【Example】

A preferred embodiment of this invention will be described below based on the drawings. Center-folding structure 10 shown in FIGS. 6 and 7
is generally used as a stage, and a pair of split top plate parts 1 and 2 are fixed at the center, and the top plate support frames 1F, 1'F,
Outer pillars 9 on the outer end sides 1B and 2B of 2F and 2'F,
9 is pivoted to P3. In addition, on the inner end side (opposite side of the split top plate parts 1 and 2), the pillar inner tubes 3 and 3 are pivotally attached P2,
This pedestal inner tube 3 is a pedestal outer tube 4 fixed to the pedestal 7.
It has a double-tube structure that allows it to be raised and lowered freely. Incidentally, the leg stand 7 is grounded via casters 8 and is slidable. In addition, L in the figure is a link spanned between the outer pedestal 9 and the pedestal inner pipe 3 and pivoted P4, P2, and the storage position parallel to the divided top plate parts 1, 2 and the divided link. It changes in conjunction with the support position orthogonal to the top plate parts 1 and 2. Therefore, when the center-folding type folding structure 10 lifts the outer ends 1B and 2B of each of the divided top plate parts 1 and 2 from the unfolded position shown in FIGS. 6 and 7, each of the divided top plate parts 1 , 2 and the pedestal inner tube 3 as a fulcrum, the divided top plate parts 1 and 2 are folded in an upright manner, and in conjunction with this, the outer pedestal 9 is displaced to the storage position as described above. The folded position is as shown in FIG. Conversely, in the case of unfolding, the divided 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 the supporting position, as shown in FIG. It becomes a deployment posture like this. As shown in FIGS. 1 and 2, such a half-folding type folding structure 10 is provided with a hook 5, a receiving portion 15, and a locking tool 6. Here, the hanging tool 5 includes an extensible part 51 made of a coil spring, and a split top plate locking part 52 made of a lock lever connected to one end (tip) side of the extensible part 51.
It is made up of. This hook 5 is installed inside a longitudinal side top plate support frame 1'F made of square pipe material and extending in the longitudinal direction of the top plate, which is fixed to the back side of one of the split top plate parts (1 in this embodiment). A part of it is embedded in
The split top plate part locking part 52 is configured to be able to expand and contract outward from the longitudinal side top plate support frame 1'F as the extendable part 1 expands. That is, the longitudinal side top plate support frame 1'F is open at the outer end of the top plate, and the pin 53 is inserted in the middle part.
is attached to pass through the interior, and the proximal end side of the telescopic portion 51 of the internally installed hook 5 is connected. Further, the receiving part 15 is provided on the longitudinal side top plate support frame 2'F attached to the split top plate part 2 facing the split top plate part 1 to which the above-mentioned hanging tool 5 is attached. In the example, the outer end of the longitudinal side top plate support frame 2'F is opened to form an insertion hole. In addition, the split top plate part locking part 52 of the hanging tool 5 is made of a substantially U-shaped rod material in this embodiment, and is engaged with the opening edge of the longitudinal side top plate support frame 1'F when not latched. A proximal bent portion 52a of the stop portion 52 is latched. At this time, since the distal end side of the split top plate part locking part 52 is not restrained in any way, it will rotate in an appropriate direction and become a hindrance. Therefore, a locking tool 6 is provided to restrain the distal end side of the split top plate locking portion 52. In this embodiment, the locking tool 6 is a through hole that is transparent in the width direction of the short side top plate support frame 1''F, which is disposed perpendicularly from the tip of the long side top plate support frame 1'F. 60. Therefore, when the hanging tool 5 is not in use, the tip end rod part 52b of the split top plate locking part 52 is inserted into the through hole 60, and the locking part or the hanging tool 5 is inserted into the through hole 60. Next, when folding the top plate, the above-mentioned hanging tool 5
Pull it outward (extend it via the telescopic part 51)
A split top plate part locking part 52 is fitted into the abutting portion of the pair of opposing split top plate parts 1 and 2 from the outside in the top plate thickness direction. At the time of this fitting, the distal end side extension portion of the split top plate part locking part 52 is connected to the receiving part 15 provided on the opposing split top plate part 2. It is inserted into the opening and movement in the front, back, left and right directions is restricted. As a result, the opposing split top plate parts 1 and 2 are prevented from moving in the unfolding direction by the locking part 52 which is externally fitted without any gap in the abutting state. Further, since the urging force of the extensible portion 51 urges the locking portion 52 in the tightening direction, the mutually restrained state of the divided top plate portions 1 and 2 can be achieved more reliably. Here, in the present invention, the longitudinal side top plate support frame is used as a guide and a receiving part for the hanging tool, but as shown in FIG. 3, a structure in which a guide 13 and a receiving piece 15' are provided may also be used. Furthermore, in this embodiment, since the outer pillars 9, 9 and the divided top plate parts 1, 2 are folded or unfolded in conjunction with each other via the link L, the divided top plate parts 1, It is preferable to provide pedestal locking means 20 for restraining the folded state of the outer pedestals 9, 9 in addition to the restraints 2 above. The pedestal locking means 20 may be of any type as long as it releasably locks the outer pedestal 9 in the folded position, but in this embodiment, the pedestal locking means 20 is a pedestal lock as shown in FIGS. 4 and 5. The apparatus 20 is used. That is, this pedestal locking device 20 includes an operation handle 21 fixed to a horizontal rod 91 that connects the outer pedestals on both sides facing each other on the short side, a split top plate portion 1,
2 and a lock lever 22 that is fixed to the handle 2 and detachably locks the operating handle 21. In the illustrated example, the operating handle 21 has a frame shape with a substantially L-shaped cross section that hangs down from the horizontal rod 91, and has a concave bent portion 21a for latching in the center.
have. On the other hand, a lock lever 22 is attached to the back side of the divided top plate parts 1 and 2 at a position corresponding to the concave bent part 21a when the outer pillar is folded. This lock lever 22 has an engaging part 22a with an L-shaped cross section that is biased in the locking direction by a biasing means S such as a spring, and has a tapered surface that slopes upward when the distal end thereof is connected to the engaging part 22a. operating piece 22
It is formed in b. Therefore, when the outer pillars 9, 9 are folded, when the concave bent portion 21a is folded and rotated, the operating piece 22b of the lock lever 22 is moved downward (in the unlocking direction).
The outer pillars 9, 9 tilt against the biasing force and move to the folding position. When the outer pillars 9, 9 move to the folded position, the concave bent portion 21a overcomes the actuating piece 22b, and the locking lever 22 is moved by the repulsive force of the biasing means.
returns to its original position and is latched by the latching portion 22a. Thereby, the outer pedestal 9 is restrained in the folded position and there is no possibility of it moving in the unfolding direction. Further, during deployment, the outer leg column 9 can be moved in the deployment direction by pushing down the operating piece 22a and removing the concave bent portion 21a from the locking portion 22a. In this way, in the middle folding structure in the above embodiment, the unfolding and folding operations of the split top plate portion and the outer pedestal are linked, so that the locking of the outer pedestal at the folded position and the split top plate By using this together with the lock at the folded position of the split top plate, the folded position of the split top plate is double locked, resulting in extremely high safety.

[Effect of the idea]

Since this invention has the above-mentioned configuration, the folded state of the split top plate portion can be maintained even if a force is applied in the unfolding direction when the center-folding type folding structure is folded. In addition, the extendable part and the proximal end of the split top plate locking part of the hook are built into the top support frame, so they do not get in the way, and are guided by the top support frame to ensure reliable expansion and contraction. can do. Therefore, it is easy to latch and operate, and there is no need to pay attention to the handling posture when transporting or storing, and it is advantageous because it can be transported safely and reliably even when stacked horizontally, for example.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main part showing the hanging structure of the half-folding folding structure according to this invention, Figure 2 is a cross-sectional view of the main part showing the same hanging state, and Figure 3 is a different implementation of this invention. FIG. 4 is a perspective view of essential parts showing an example of the pedestal folding locking means, FIG. 5 is a schematic diagram showing the locking state, and FIG. 6 is a diagram of the center folding structure. FIG. 7 is a front view showing the unfolded position, FIG. 7 is a side view of the same, and FIG. 8 is a front view showing the folded position. 1, 2...Divided top plate part, 3...Pillar inner tube, 4...
... Pillar outer tube, 5... Latching tool, 6... Locking tool, 7...
...pedestal, 8...caster, 9...outer pillar, 10
...Central folding structure, 15... Receiving part, 51...
Expandable part, 52...Locking part.

Claims (1)

[Claims for Utility Model Registration] (1) Folding operation of the outer pedestal by lifting the outer end side of the split top plate part fixed to a pair of top plate support frames that are split at the center and pivotally connected. In a structure in which the opposing split top plate sections are latched from the outside when folding a mid-folding structure that is folded in conjunction with the A telescoping section consisting of a spring built into the top support frame and fixed at its base end, and connected to the tip of the telescoping section with its base end housed within the top support frame, allowing the top board to be folded. When the outer ends of a pair of opposing split top plate parts are pulled out against the elastic return force of the expandable part, they can be fitted in and removed from the outside as one piece in the thickness direction. In addition to providing a hook having a top plate part locking part, a receiving part formed on the back surface of the opposing split top plate part to restrain the tip of the split top plate part locking part is provided. Features a hanging structure for the mid-folding structure. (2) The split top plate is formed on a short side top plate support frame that extends perpendicularly to the tip of the top plate support frame provided with the hook and extends in the width direction of the split top plate portion. The mid-fold type folding structure according to claim 1, which is a registered utility model, characterized in that it is provided with a locking tool provided with a hole through which the tip of the portion engaging portion is removably inserted when not latched. latching structure. (3) The folding structure of the mid-fold type folding structure according to claim 1 of the utility model registration claim, characterized in that the receiving part consists of an opening in a top plate support frame fixed to the opposing divided top plate parts. Stop structure. (4) A request for registration of a utility model characterized in that a leg folding locking means is provided on the back of the split top plate portion to lock the leg of the folding structure in the folded position when folded. A hanging structure for a mid-folding folding structure according to item 1.