JPS5857591B2 - Inspection port lid opening/closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an inspection port installed in a ceiling or wall for inspecting and repairing various equipment such as wiring, piping, and air ducts installed inside the ceiling or between wall layers. This invention relates to a lid opening/closing device that opens and closes a lid provided in a.

In conventional rotary inspection ports, where the hinge part that rotatably supports the lid on the outer frame is installed inside without being exposed to the outside, the lid must be made slightly smaller than the opening in the outer frame. Therefore, when the lid is closed, a gap is created between the hand frame and the lid inside the hand frame.

By the way, in buildings that are fully air-conditioned, there are particularly large differences in temperature and air flow towards the outside of the ceiling, so if there is even a slight gap between the outer frame of the inspection door and the lid, as mentioned above,
Air enters and exits from the gap at high speed, causing dust to adhere to and stain the outer frame and lid near the gap, and the lack of airtightness results in large losses during air conditioning.

Therefore, it may be possible to provide a flange on the outer periphery of the part of the lid corresponding to the outer frame opening, and cover the periphery of the outer frame with this flange so that there is no gap between the outer frame and the lid. .

However, with the conventional rotary support structure for opening and closing the lid, the flange not only hits and scratches the ceiling plate around the outer frame, but also prevents the lid from opening sufficiently.

In view of these circumstances, the present invention aims to rotate and open/close a lid body formed so as to be able to cover the entire surface of the outer frame without interfering with the ceiling panels, etc. around the outer frame. year,
To this end, an improved inspection port lid opening/closing device is provided in which when the lid is opened, the carrier lid body is pulled out to the outside of the outer frame using its own weight, and then the lid body is rotated outside the outer frame and opened. It is something.

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

First, a first embodiment of the present invention is shown in FIG. 1 and FIG.
The lower end of the main edge 2 has an outward projecting edge 3, which is fitted into a hole 5 that opens at the inspection hole installation position of the ceiling plate 4, and is engaged when the projecting edge 3 is hooked onto the ceiling plate 4. It is suspended and supported by a stopper 6.

Reference numeral I denotes a lid body that closes the opening of the outer frame 1, and the above-mentioned projecting edge 3
It integrally has an outward facing flange 8 covering the outer frame 1, and is attached to the outer frame 1 at two opposing locations on the inside by an opening/closing device 9 and a locking device 10.

The opening/closing device 9 has the base side of the horizontal part 11a pivotally attached to the vicinity of the edge of the ceiling surface of the lid body 7 by a support shaft 13, and the tip part of the horizontal part 11a is bent upward to form the vertical part 11b. The driven link 11 has a formed abbreviated shape and a linear regulating link 12 whose base side is pivotally connected to a mounting plate 15 fixed to the inner wall surface of the outer frame 1 by a support shaft 17, 11
The bent portion and the tip end of the regulation link 12 are rotatably connected to each other by a support shaft 18.

Further, the driven link 11 is arranged in a parallel plane close to the mounting plate 15, and the vertical portion 1 of the driven link 11
A bottle 14 is provided at the tip of 1b, and this bottle 14 engages with an arc-shaped elongated hole 16 bored in the mounting plate 15.

This arc-shaped long hole 16 has a center of curvature P as shown in FIG.
As shown in , it is located directly above the support shaft 17 that pivots the base side of the regulation link 12 and at the same height as the pin 14 of the driven link 11, and at its terminal end 16a, the regulation link 12, the outer frame 1 is
The main edge has an appropriate distance in the longitudinal direction.

Therefore, the driven link 11 has a mounting plate 15 fixed to the inner wall surface of the outer frame 1 in a plane parallel to the inner wall surface of the outer frame 1.
It moves in a state where the torsional movement is restricted by being guided by, and the straight line connecting the point P and the bottle 14 is always kept parallel to the restriction link 12.

Thus, when the lid is closed, as shown in FIG. 16, and the regulation link 12 is horizontal.

Next, when the lid opening locking device 10 is unlocked to free the lid I, the lid 7 has the effect of descending under its own weight.
As a result of this action, the regulating link 12 rotates downward around the support shaft 17, and the bottle 14 descends along the elongated hole 16, with the driven link 11 and the lid 7 being in a horizontal state and twisted. In a state where the movement in the direction is restricted by the mounting plate 15, it descends perpendicularly to Y and exits the outer frame 1.

Then, when the bottle 14 reaches the lower end of the elongated hole 16, the driven link 11 and the lid 7 stop descending, and the lid 7 is further lowered.
By releasing the hand that was supporting the locking device 10,
It rotates around the support shaft 13 under its own weight and opens.

Note that the downward stroke of the bottle 14 is set to be large relative to the distance between the support shaft 13 of the lid 7 and the end of the flange 8, so that the flange 8 and the ceiling plate 4 are separated as shown in Figure 2. The lid body 7 rotates until it becomes vertical and is fully opened without any interference.

In addition, when closing the lid I, rotate the lid 7 to make it horizontal in the opposite manner as described above, and then push up the restriction link 12.
As the bottle 14 rotates upward, the bottle 14 moves upward along the elongated hole 16, and the lid I is fitted into the outer frame 1 and covers the entire area on the ceiling side.

Incidentally, in the above embodiment, the elongated hole 16 is formed by drilling the mounting plate 15, but it may be formed by two parallel ribs on the mounting plate 15, or it may be formed directly on the main edge 2 of the outer frame 1. It may also be formed by drilling holes.

In addition, the support shaft 17 that pivots one end of the regulation link 12 is connected to the outer frame 1.
It can also be installed directly towards the

Next, according to the second embodiment of the present invention shown in FIG. 3, an extension part 19 is bent and integrally provided on the support shaft 18 side of the regulation link 12, and the tip of this extension part 19 is connected to the closing lid. The structure is such that it sometimes comes into contact with the flange 8 of the lid 7 or the back surface of the lid, but other than this, the structure is the same as that of the first embodiment.

Accordingly, in this embodiment, when the L lid-closing regulation link 12 rotates downward, the lid body 7 is pushed by the extension portion 19 and descends while rotating to come out of the outer frame 1.

Further, when the lid body 7, which is in a vertical rotational position when the lid is closed, is rotated upward, it collides with the extension part 19 before it becomes horizontal, and from this point on, when the lid body 7 is rotated upward and pushed up, the extension part 19 The regulation link 12 is interlocked via the lid closing action.

Therefore, in such a configuration, the lid I can be smoothly attached to the outer frame 1 by being guided by the extension portion 19 especially when the lid is closed.

According to a third embodiment of the invention in FIG.
2 is provided with a 19% extension extending in line with the second embodiment, and a protrusion 20 that abuts against the lid flange 8 is provided at the tip thereof, and the operation and effect are exactly the same as in the second embodiment.

According to the fourth embodiment of the present invention shown in FIG. 5, the end of the extension 12a of the closing link 12 is obliquely attached so as to collide with the flange 8 of the lid I, and is supported in the middle. It is pivotally connected to the driven link side by a shaft 18, and the regulating link 12 is in a non-parallel state with the straight line connecting the bin 14 and the point P.

As a result, in this embodiment, when the lid is opened, the driven link 11 descends while rotating slightly without moving in parallel due to the above-mentioned non-parallel relationship, and the other effects are the same as those described above.
This is exactly the same as the embodiment.

According to a fifth embodiment of the invention in FIG.
A support plate 21 is provided on the back surface of the lid body 7 directly below the lid body 7 so as to come into contact with the lid body 7 when the lid is closed.

As a result, in this embodiment, the lid body 7 is rotated and lowered together with the support plate 21 by the extension part 19' of the regulation link 12 when the lid is opened, and when the lid is closed, as in the second embodiment X. The regulation link 12 contacts the support plate 21 from the middle and moves in conjunction with the support plate 21.

At the end of the lid closing action, the regulating link 12 is pushed up by the lid I via the support plate 21, so that the clearance of the support shaft 170 is absorbed and the lid 7 is prevented from drooping.

According to a sixth embodiment of the present invention shown in FIG. 7, a support plate 21' similar to the fifth embodiment is shorter than the regulating link 12.

Therefore, in the fifth embodiment, since the regulation link 12 slides on the support plate 21 when the lid is closed, there is a concern that the regulation link 12 may hit.
2 under the support plate 21'force; sliding and its regulating link 12
, so there is no danger of the above-mentioned collision.

In addition, in such an embodiment, as shown in FIG.
If an elastic airtight material 22 made of synthetic resin or a foam thereof is adhered to the back surface of the flange 8 of the lid 7, airtightness can be further ensured.

The embodiment described above is applied to a ceiling inspection port, but it can also be similarly used to a wall inspection port, and the embodiment is shown in FIGS. 9a and 9b.

That is, the outer frame 1 is vertically fitted into a mounting hole 24 formed in a wall 23, and the lid body T is attached to this outer frame 1 by, for example, an opening/closing device 9 configured in the same manner as in the sixth embodiment. ing.

By the way, if it is installed vertically like this, it is impossible to use the own weight of the lid opening time differential body I to perform the opening operation. 7
There is a risk that the flange 8 may rotate and damage the wall surface 23a.

Therefore, a spring 25 is provided between the mounting plate 15 and the regulation link 120 in order to forcibly rotate the regulation link 12, so that the spring 25 immediately rotates after unlocking.
The regulating link 12 is rotated by the force of , and the lid body T jumps out from the outer frame 1 together with the driven link 11, and thereafter the lid body 7 is rotated and the lid opening action is performed without damaging the wall surface 23a.

Furthermore, the engaging pin 14 and the elongated hole 16 can be formed by providing the pin 14 toward the outer frame 1 and forming the elongated hole 16 toward the driven link 11, as shown in FIG. 10, in addition to the embodiment described above. It may be engaged.

On the other hand, the lid opening/closing device according to the present invention can be used not only when the lid body is formed to cover the entire area on the ceiling side of the outer frame as described above, but also when the lid opening and closing device according to the present invention is formed to cover the entire area on the ceiling surface side of the outer frame. It can also be applied to the inclusion type.

That is, in this embodiment, for example, the lid body T is connected to the opening 26 of the outer frame 1.
An outward facing flange 8' is provided around the periphery of the opening 26 so as to close the opening 26.

Then, the lid body I is assembled inside the outer frame 1 with the ceiling surface side aligned, and these are connected by a lid opening/closing device having a support plate 21 as shown in FIG. 6, for example.

Further, an inward protrusion 27 is connected to the upper end of the main edge 2 of the outer frame 1 on the opposite side to the protrusion 3, and the upper end of the inner frame 28 of the lid body 7 is arranged so that it is close to the protrusion 27. Extended, these protrusions 2
An airtight material 22 similar to that shown in FIG. 8 is interposed between 7 and the inner frame 28.

In this way, in this embodiment as well, the lid body 7 opens and closes in the same manner as described above, and when the lid is closed, the airtight material 22 is brought into close contact between the protruding piece 27 of the outer frame 1 and the inner frame 28 of the lid body 7, thereby ensuring airtightness. Retained.

As explained above, according to the present invention, the lid body 7 covers the entire Y area of the ceiling surface side of the outer frame 1 to maintain airtightness, so the problems that occur when there is a gap as in the conventional case are eliminated. It also looks better.

Moreover, even with this structure, the lid opening time difference body 7 does not rotate after coming out of the outer frame 1 and damage the ceiling board, etc., especially when applied to a ceiling inspection opening. Utilizing the opening action of 7 due to its own weight, when applied to a wall inspection port, the force of the spring 25 ensures smooth operation.

Furthermore, when applied to a fitting type inspection port, the degree of freedom in designing the flange 8' of the lid body 7, the inner frame 28, etc. increases.

Further, the driven link 11 is located in a parallel plane close to the inner wall surface of the outer frame 1, and moves up or down using the inner wall surface of the outer frame 1 as a guide. The movement in the torsional direction is restricted by the inner wall surface 1, and the movement locus of the lid body 7 can be prevented from being twisted.

Therefore, the outer frame 1 or the ceiling surface is not damaged when the lid is opened or closed, and the operation can be made smoother.

Further, the support shaft 1T of the regulation link 12 and the terminal end 1 of the elongated hole 16
6a are arranged at an appropriate distance in the longitudinal direction of the main edge of the outer frame 1, so when the lid 7 is open, the weight of the lid 7 is equal to the weight of the pin 14 that engages with the support shaft 1T and the elongated hole 16. It is possible to avoid applying an excessive load to only one side.

[Brief explanation of drawings]

FIG. 1 is a plan view of a ceiling inspection opening to which the present invention is applied, seen from the back side, and FIGS. 3 to 7 are sectional views showing the second to sixth embodiments, respectively. FIG. 8 is a sectional view of an embodiment considering airtightness, and FIG. 9 a. , l) is a sectional view showing an embodiment in which the present invention is applied to a wall inspection port, FIG. 10 is a sectional view showing still another embodiment of the present invention, and FIG. It is a sectional view showing an example applied to an inspection port. 1... Outer frame, 2... Main edge, 3... Flange, 4...
・Ceiling plate, 5... Hole, 6... Locking tool, 7... Lid, 8, 8'-... Flange, 9... Opening/closing device, 10...
... Locking device, 11 ... Followed link, 12-0, Regulation link, 13.17.18 ... Support shaft, 14 ... Pin, 15 ... Mounting plate, 16 ... Long hole, 16a...Terminal part, 19, 19'--Extension part, 20--Protrusion,
21, 21'--Support plate, 22--Airtight material, 23-
...Wall, 24...Mounting hole, 25...Spring, 2
6...Opening portion, 27...Protrusion piece, 28...Inner frame.

Claims (1)

[Claims] 1. An abbreviated driven link whose base side is pivoted near the edge of the ceiling surface of the lid body and whose tip end is bent; a regulating link that connects the bent portion of the driven link; the driven link is located in a parallel plane close to the inner wall surface of the outer frame; An arc-shaped elongated hole having a center of the spacer above the root side of the restriction link and having an appropriate distance in the longitudinal direction of the main edge of the outer frame between the end portion and the root side of the restriction link. At the same time, a pin that engages with this arcuate long hole is made to protrude from either the driven link or the inner wall surface of the outer frame, and by engagement of the arcuate long hole and the pin, the driven link is connected to the A lid opening/closing device for an inspection port, characterized in that it is raised or lowered using the inner wall surface of an outer frame as a guide.