JPH076380Y2 - Opening cover for construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an opening shielding lid for temporarily shielding an opening installed on a floor surface or the like of a building under construction.

(Prior Art) The openings formed on the floor surface of a building during construction are mainly used for the following purposes.
That is, it occurs after the concrete pouring process and the removal of steel piles that are no longer needed due to the solidification of the concrete.

Carrying out work accompanying removal of formwork panel material for concrete,
And for passing through the workers.

Drainage tank (manhole) installed at the bottom of the building
Doorway to.

Port for installation of equipment and for loading and unloading of equipment.

The opening provided for the above purposes will be closed with the completion of the construction, but when not in use during the construction up to that time, the opening is a wooden panel material or for safety and safety. It was conveniently closed by a steel plate material.

As a cover for exclusive use of such an opening, a veneered plywood material has been improved in the past, a small diameter hole for detachably attaching a handle metal fitting for transportation is provided, and further, a plurality of bolts are attached to a steel plate material. A hole is provided at a corner of a quadrangle, and bolts are inserted into the hole and clamped and fixed by nuts, etc., so that the lid is prevented from wobbling by contacting the four corners of the opening. Exists.

(Problems to be Solved by the Invention) However, the conventional opening shielding lid has the following problems.

(1) The number of bolt holes formed on the steel plate is limited by the strength condition of the lid, but in many cases it does not match the size of the opening depending on the formation position.

(2) The plate material may be deformed such as warped due to passage over the shielding lid of a construction vehicle or the like, and the material of the shielding lid and the hole processing are limited in terms of strength.

(3) In many cases, a fitting that always matches the opening is not always obtained, and the compatibility with the size of the opening having a nonstandard dimension is particularly poor.

(4) When attaching, removing, and tightening the locking members such as the attached bolts and nuts, work must be performed from both the front and back sides of the shielding lid.

(5) Since the member contacting the opening is in point contact with a thin bolt or the like, it is difficult to achieve a stable fit between the shielding lid and the inner surface of the opening.

The present invention has been made in consideration of the above-mentioned problems, and an object thereof is to provide an opening having a safe and reliable fit, which is excellent in compatibility regardless of the size of the opening. It is to provide a partial shielding lid.

(Means for Solving the Problems) In order to achieve the above objects and achieve the objects, the following means were taken in the opening shield lid of the present invention.

(1) A mounting hole having a predetermined length is arranged near a diagonal corner of a rectangular plate member, and the mounting hole is contacted with the mounting hole in the vicinity of an inner side surface angle of the building floor surface through a locking member. An abutting member in contact is slidably and detachably and selectively attached.

(2) A frame member is provided that surrounds the mounting hole and has at least one recess at a predetermined position so that the locking member can be easily seated at the predetermined position and the relative position can be confirmed.

(3) The abutting member has two sides extending at right angles longer than a length such that the abutting member comes into contact with any of the leg members in order to prevent rotation about the locking member.

(4) On the other hand, the leg member is arranged parallel to each side and perpendicular to the plate surface so as to surround the center of gravity of the plate member on the horizontal plane, and is formed to be longer than the height of the contact member.

(5) The contact corner portion of the contact member is formed into a curved surface having a predetermined curvature.

(Operation) By taking the above-mentioned means of the present invention, the following operation occurs.

(1) A mounting hole having a predetermined length is arranged near a diagonal corner of a rectangular plate member, and the mounting hole is contacted with the mounting hole in the vicinity of an inner side surface angle of the building floor surface through a locking member. By slidingly and detachably and selectively attaching the abutting members that come into contact with each other, it becomes possible to variably fit with the opening, which was not possible with the conventional technology, and it is not compatible with the conventional ones. You can improve the problem.

(2) The presence of the positioning hole formed in the frame member to indicate the standard position can serve as a guide for the setting positional relationship of the opening corner angle abutting member mounted below the positioning hole. Therefore, it is possible to appropriately preset the contact member at a position that substantially matches the opening before the opening is matched with the opening on the site.

(3) By extending the two right-angled sides of the abutting member and setting the length so as to be in contact with any of the leg members, the member itself is prevented from rotating around the locking member. In addition to blocking, it is directed in the vicinity of the inside corner of the opening that should always come into contact when fitted into the opening.

(4) The leg member creates a gap between the outer peripheries of the upper and lower shielding lids when the opening shielding lids of the present application are stacked and stored. Therefore, since this leg member functions as a spacer,
The worker can easily adjust the four corner contact members and the like with the shielding lids stacked.

(5) By forming the round shape at the corners of the opening angle contact member, the contact between the opening angle contact member and the opening is not a point contact but a surface contact. Therefore, the stability of joining is also improved.

(Embodiment) FIG. 1 shows a perspective view of an opening shielding lid from an obliquely upper side, showing an embodiment of the present invention. From above the opening 9 provided at the time of building construction, the rectangular opening shielding lid 1 of the present application is attached as shown so as to cover this portion.

At this time, the worker carries the carrying and relocating work by holding the grasping member (handle) 4 attached to the grasping member attaching hole 23 of the upper plate member 2 of the shielding plate. In the opening 9, a plurality of leg plate members 3 are formed on the back surface of the upper plate member 2 in the downward direction.
The four corners are supported by an opening corner contact member (corner member) 5 (not shown, see FIG. 2) that is inserted into and abuts in a shape (right angle) that substantially matches the four opening corner angles of the opening 9. To be done. That is, four reinforcing frame members 6 extending in the diagonal direction are welded to the upper surface of the upper plate member 2 having a square (square) or square shape by welding or the like. Through the positioning hole 61 formed on the center line of the frame member 6, by using a locking member 52 such as a bolt and a fixing member 53 such as a nut that penetrates the locking member 52, the opening corner angle abutting member 5 is fixed. Opening 9
The inner plate of the upper plate member 2 can be fitted into the upper plate member 2 and can be fixed to a desired position of the upper plate member 2.

Therefore, the desired opening 9 can be covered by the opening shielding lid 1 of the present application, and can be installed safely and securely without rattling. That is, in comparison with the conventional alignment work performed by trial and error at the site where the opening 9 is present, the corner member 5 is “temporarily fastened” to the approximate size of the opening 9 in advance, For fine adjustment in the actual fitting work, a plurality of (four) bolts or other locking members 52 on the upper plate member 2 are lifted without lifting the entire heavy shielding lid 1.
The bolts can be "finally tightened" after being adjusted to the optimum position by appropriately moving the bolts along the diagonal direction. Therefore, both the “positioning work” and the “tightening work” become accurate and easy, and at the same time, even if the size of the opening 9 slightly changes, it is possible to flexibly cope with the size.

Further, FIG. 2 is a perspective view of the opening shield lid 1 of the present invention as seen obliquely from below. As shown in the drawing, on the back surface of the upper plate member 2, four opening corner angle abutting members 5 that can be inserted into the inner surface of the opening, and vertically provided so as to surround the center of gravity of the upper plate member 2, are provided. Four leg members 5 serving as one leg (foot) are provided. The opening corner angle abutting member 5 has four locking hole portions each having a width that allows the locking member (bolt) 52 formed in the upper plate member 2 to penetrate therethrough and move.
It is attached to 21 via the bolt 52. Each of the locking hole portions 21 is formed by forming a hole from a predetermined position on the diagonal line of the upper plate member 2 to the vicinity of the corner, and is formed at a position symmetrical with respect to the center of gravity of the upper plate member 2. Therefore, the position of the center of gravity of the opening shielding lid 1 does not change at the time of completion, and the "sit" is good even when a plurality of layers are stacked.

Further, in the vicinity of the periphery of the upper plate member 2, a connecting member hole 22 for connecting with another opening shielding lid is formed if desired.

FIGS. 3 (a) to 3 (c) are three-sided views (plan views and side views) of the opening shielding lid, respectively. As shown in FIG. 3 (a), in the opening shielding lid 1 of the embodiment of the present application, the shape of the upper plate member 2 is a square, and the respective constituent elements are arranged point-symmetrically at the center of gravity of this square. You can see that

3 (b) and 3 (c) are side views of the opening shielding lid 1 of the present embodiment as viewed from the side. In the above two figures, the positional relationship and the height relationship between the leg member 3 attached to the lower portion of the upper plate member 2, that is, the back surface, and the opening corner mounting member 5 are shown. That is, the height of the opening corner contact member 5 is set to be slightly shorter than the height of the leg member 3. Further, for example, a bolt for locking the opening corner angle abutting member 5 to the upper plate member 2 has a length such that its tip desirably stays at a position not protruding from the bottom surface of the corner angle abutting member 5. The locking member of the cage is adopted. Further, since the corner contact member 5 freely rotates around the bolt, the contact member 5 is prevented in order to prevent this.
The two sides forming a right angle may contact the leg member 3 and be extended so as not to rotate further.

FIG. 4 is a partially enlarged view showing a main part of the embodiment of the present invention, in which the mounting relationship between the opening corner angle abutting member 5, the upper plate member 2 and the reinforcing frame member 6 fixed thereon. Is represented. The opening corner angle contact member 5 is composed of a contact surface member 51 which is bent at a right angle and which contacts the inner surface of the opening corner, and a corner member 55 in which the bolt mounting hole 54 of FIG. 2 is formed. It is configured. The reinforcing frame member 6 is welded to a predetermined position of the upper plate member 2 by welding or the like. The reinforcing frame member 6 is provided with a positioning hole 61 indicating a standard position so that the main contact member fits the size of a general opening. The hole shape of the frame member 6 including the positioning hole 61 is as follows. A desired number (four in the figure) of circular holes are continuous in the longitudinal direction of the reinforcing frame member 6 and are slightly wider than the width of the locking hole portion 21 formed in the upper plate member 2. The holes are formed as shown in the figure. The diameter of this circle is set to be slightly larger than the size of the head portion of the bolt 52 used. In addition, the center positions of these circles are such that the size of the quadrangle formed by connecting the centers of the same circles of the other three reinforcing frame members 6 with straight lines matches the standard size of the actual opening. It is installed at various positions. For example, the standard size of the opening formed during actual construction is 400,450,50 per side if the shape is a square.
Shows either 0,550,600, or 650mm square dimensions. Further, when the shape is a rectangle, it is often an integral multiple of the size of the standard square, and therefore, it is possible to operate by connecting a plurality of the shielding lids 1 of the present embodiment having the square shape. Is possible.

Here, the distance between the centers of adjacent circles of a plurality of circular holes formed in the actual reinforcing frame member 6 is obtained. The distance is equal to the height h of a right triangle having the moving distance L as two opposite sides. Therefore, the formula h = L / ▲ √ ▼ holds.

On the other hand, since L = (450−400) = (500−450) = 50 mm, h = 50 / 1.4142≈35.35 mm is calculated, and this value is the interval between the centers of adjacent circles.

The diameter size of the bolt as the locking member in the above embodiment is φ depending on the purpose of use, strength and handling.
The one with 16-18 mm would be the best. The nut 53, which is a fixing member having a fitting relationship with the bolt, is fixed to and integrated with, for example, the back surface of the square plate member 55 by welding or the like.

FIG. 5 shows a side view when a plurality of the opening shielding lids 1 are stacked. The shield lid 1 supported by the four leg members 3 on the back surface of the upper plate member 2 is stored in a state of being vertically stacked. In this stacked state, since gaps are formed between the upper and lower shield lids on the outer periphery of the leg member 3, the opening corner contact members 5 provided at the four corners of each shield lid are attached to the mounting bolts. By loosening 52, it is possible to smoothly and freely slide along the mounting hole 54 (not shown). Therefore, the opening corner abutment member 5 should be “temporarily fastened” to a desired position in advance with the circular holes indicating the four standard positions of the reinforcing frame member (not shown) as a guideline in such a laminated state. Is easy.

FIG. 6 is a partially enlarged view showing another embodiment of the present invention. The main difference from the previous embodiment is that the shape of the corner angle contact member 5 of the opening has a predetermined radius. It has a round shape with R, that is, it is formed in a curved surface. In general, the shape of the opening at the time of construction does not conform to the design drawing, and in particular, the corners are often right angles and not sidewall surfaces without irregularities.
Although the contact member of the previous embodiment may be optimal for the opening of the design drawing, the opening-angle contact member 5 formed in a round shape as in this modification does not correspond to the opening. It is possible to obtain an abutting condition that is not affected by the unevenness of the part angle. That is, it is possible to obtain stable fit of surface contact that can flexibly deal with the target angular shape.

The present invention is not limited to the above embodiment. For example, the shape, the material, and the like can be variously modified without departing from the scope of the present invention.

(Effect of Device) The present invention has the following effects.

(1) A mounting hole having a predetermined length is arranged in the vicinity of a diagonal corner of a rectangular plate member, and an abutment member is slidably attached to the mounting hole through a locking member to open the opening. Since it is possible to flexibly adapt to the size of the part, at the same time, by adopting the abutting member having a shape with two orthogonal surfaces, surface contact can be obtained with the inner surface of the opening. A stable fit between the shielding lid and the opening can be achieved.

(2) Since it is possible to loosen the mounting bolts of the abutment member of the opening angle corner and slide smoothly and freely along the mounting hole, the abutment member is moved to the standard position where the frame material of the slide process is processed. "Temporary tightening" in advance at the desired position using
It becomes easy to do.

(3) By extending the two right-angled sides of the abutting member to make it longer than the length of contact with any of the leg members, the abutting member is prevented from rotating around the locking member, It is always held in a position pointing near the corner.

(4) "Positioning work" and "tightening work" such as "temporary tightening" of the joint members in advance in the stacked state by providing leg members that create a gap between the upper and lower shielding lids
Will be easier.

(5) By forming the opening corner contact member in a round shape, a stable fit that is not affected by the slight unevenness of the corners on the inner side surface of the opening can be obtained.

As described above, it is possible to provide an opening shielding lid that can achieve the object of the present invention.

[Brief description of drawings]

FIG. 1 is a perspective view of an opening shield lid according to an embodiment of the present invention from diagonally above, FIG. 2 is a perspective view of the opening shield lid of the present invention from diagonally below, and FIG. a) to FIG. 3 (c) are three-side views (plan view and side view), respectively, of the opening shielding lid, and FIG. 4 is a partially enlarged view showing a main part of the embodiment of the present invention, and FIG. FIG. 6 is a side view of a case where a plurality of the opening shielding lids are stacked, and FIG. 6 is a partially enlarged view showing another embodiment of the present invention. 1 ... Opening cover, 2 ... Upper plate member, 3 ... Leg member (rib), 4 ...
Grip (handle) member, 5 ... Aperture corner contact member (corner member), 6 ... Reinforcing frame member, 21 ... Locking hole portion, 22 ... Connecting member hole, 23 ... Gripping member mounting hole, 41 ... Gripping end member (nut), 51 ... Abutting member, 52 ... Locking member (bolt), 53 ... Fixing member (nut), 54 ... Mounting hole, 55 ... Square member, 61 ... Positioning hole row.

Claims (5)

[Scope of utility model registration request] 1. An opening on a floor of a building in which a mounting hole having a predetermined length is arranged in the vicinity of a diagonal corner of a rectangular plate member and is slidably mounted in the mounting hole via a locking member. An opening shielding lid that is detachably and selectively attached to and shields the opening by an abutting member that abuts in the vicinity of the inner side surface corner. 2. A frame member is provided which surrounds the mounting hole and has at least one recess at a predetermined position so that the locking member can be easily seated at the predetermined position and the relative position can be confirmed. The opening shielding lid according to claim 1, wherein the opening shielding lid is formed. 3. The contact member is extended to a predetermined length or more so that two sides forming a right angle come into contact with any of the leg members so as to prevent rotation around the locking member. The opening shielding lid according to claim 1, wherein the opening shielding lid is formed. 4. The leg member is disposed parallel to each side and perpendicular to the plate surface so as to surround the center of gravity of the plate member on the horizontal plane, and has a leg portion longer than the thickness of the contact member. The opening shielding lid according to claim 1, wherein: 5. The opening shielding lid according to claim 1, wherein the abutting member has a curved surface having a predetermined curvature at a corner portion facing an inner side surface angle of the opening portion.