JP6808509B2 - Through hole concealment cover device and base material component - Google Patents

Description

The present invention relates to a through-hole concealment cover device for covering a through-hole formed in a wall material such as a ceiling wall, and a base material constituent member.

For example, a surveillance camera mounted on a ceiling wall or the like is miniaturized in response to an improvement in performance, and an existing surveillance camera is replaced with another small one with excellent performance, or the existing surveillance camera is removed. And sometimes leave it as it is. In either case, it is necessary to cover and close the existing through hole formed in the ceiling wall or the like.

As one of the through-hole concealment cover devices used for the above purpose, the one disclosed in Patent Document 1 is known, and a spring is integrally attached to the back surface side of the plate body that closes the through-hole on the front surface. The spring is brought into contact with the peripheral edge of the through hole on the back surface of the ceiling wall or the like, and the elastic force of the spring supports the weight of the appliance attached to the plate body.

Therefore, if the weight of the fixture newly attached to the plate body is large, the spring that is in contact with the back surface of the ceiling wall may be deformed and the fixture may fall.

Japanese Unexamined Patent Publication No. 8-180725

An object of the present invention is to provide a through-hole concealment cover device and a base material component that can accommodate through-holes of various sizes of wall materials and can be attached even to a heavy instrument.

The invention of claim 1 for solving the above-mentioned problems is a through-hole concealment cover device for covering a circular through-hole formed in a wall material such as a ceiling wall.
A back side holding body arranged on the back side of the wall material so as to cross the through hole,
It is arranged on the surface of the wall material so as to cross the through hole, and is brought close to the back side holding body by the rotation of the bolt body screwed to the female screw portion provided on the back side holding body, and is brought close to the back side holding body. The front side holding body that holds the wall material and
It is fixed to the front side holding body via a fixing means, is formed larger than the through hole, and includes a cover body having a hidden main body portion that hides the through hole while covering the entire front side holding body. It is characterized by that.

According to the invention of claim 1, the front side and the back side holding bodies are arranged on both the front and back surfaces of the through hole in the wall material so as to cross the through hole formed in the wall material, and the front side. When the bolt body penetrating the holding body is screwed and rotated with respect to the female screw portion of the back side holding body, the front side holding body is brought close to the back side holding body, and the wall material is held by the back side and front side holding bodies. Will be done. In this state, when the cover body is fixed to the front side holding body via the fixing means, the through hole formed in the wall material is covered by the hidden main body portion of the cover body. In this way, each of the front and back sandwiches arranged on both the front and back sides of the wall material across the through hole of the wall material sandwiches each peripheral edge portion of the wall material facing each other and covers the wall material. Since the body is integrally attached to the front side holding body in a fixed state, even if the weight of the new device attached to the cover body is heavy, there is no risk of the device slipping or falling, and the body is newly attached to the cover body. Can be installed stably.

The invention of claim 2 is the invention of claim 1, wherein the back side holding body or the front side holding body is brought into contact with the inner surface of the through hole to regulate the movement with respect to the through hole, and the through hole is formed. On the other hand, it is characterized in that a slide regulating means for maintaining a crossed state is provided.

According to the invention of claim 2, the slide regulating means attached to either the back side or the front side holding body restricts the movement of the back side and the front side holding bodies integrated by the bolt body to the through holes. Therefore, since the crossing state of each of the integrated sandwiches, that is, the state of sandwiching both ends is maintained, the holding force of the wall material by the back and front sides is temporarily weakened and integrated. Even if the back side and front side holding bodies are slid in the transverse direction of the through hole, there is no possibility that the integrated holding bodies will come off from the opposite peripheral edge portion of the through hole in the wall material. Therefore, the through hole of the wall material can be stably covered by the cover body, and when a new appliance is attached to the cover body, the attached state of the appliance is stabilized.

The invention of claim 3 is the invention of claim 2, wherein the slide regulating means is provided so as to be able to select a plurality of positions along the transverse direction of the through hole in order to correspond to a plurality of types of through holes having an inner diameter. It is characterized by being.

According to the invention of claim 3, a plurality of slide regulating means provided on each of the holding bodies on the back side or the front side along the transverse direction of the through hole corresponding to the inner diameter of the through hole formed in the wall material. By selecting any one of the plurality of through holes having different inner diameters, the amount of movement along the transverse direction of the through holes of the back side and front side sandwiched bodies integrated by the bolt body can be minimized. It is possible to maintain the crossing state of each holding body.

The invention of claim 4 is the invention of any one of claims 1 to 3, wherein the back side holding body or the front side holding body is provided with a plurality of female screw portions to which movement control screws, which are slide control means, are screwed. It is characterized in that it is provided along the transverse direction.

According to the invention of claim 4, a plurality of sizes of through holes can be obtained by selecting a specific one of the plurality of female threaded portions according to the size (inner diameter) of the through holes provided in the wall material. On the other hand, the crossing state of the integrated back side and front side holding bodies with respect to the through holes can be maintained.

The invention of claim 5 is characterized in that, in the invention of claim 4, the head of the movement restricting screw comes into contact with the inner peripheral surface of the through hole.

According to the invention of claim 5, by bringing the head of the movement restricting screw into contact with the inner peripheral surface of the through hole of the wall material, the inner peripheral surface of the wall material is compared with the male threaded portion on the outer circumference of the bolt body. It is possible to prevent the occurrence of damage such as being "scraped", and to reliably maintain the crossing state of the integrated back side and front side holding bodies with respect to the through holes.

The invention of claim 6 is the invention of any one of claims 1 to 5, wherein the fixing means is projected from a locked hole formed through the front side holding body and the back surface of the cover body. Therefore, it is composed of an L-shaped locking hook portion in a front view in which the locked hole is locked or the locked is released by sliding the front side holding body with respect to the cover body in the transverse direction. It is characterized by.

According to the invention of claim 6, an L-shaped locking hook is provided on the back surface of the cover body in the locked hole of the front side holding body attached to the facing peripheral edge portion of the through hole of the wall material. By sliding the cover body in the transverse direction after inserting the portion, the locking hook portion of the cover body is locked and fixed to the locked hole of the front side holding body, so that a large fixed supporting force is provided. , The cover body can be fixed to the front side holding body. Therefore, it is not necessary to screw-fix the peripheral edge portion of the cover body and the wall material in a state where the cover body is locked and fixed to the front side holding body only by the locking structure. If for some reason you want to remove the cover body that hides the through hole of the wall material, slide the cover body in the opposite direction to the locking state to release the lock and release the cover body. It can be removed.

The invention of claim 7 is the invention of claim 6, wherein an annular standing wall portion is projected toward the wall material at the peripheral edge of the hidden main body portion of the cover body, and the annular standing wall portion is partially provided with the said ring-shaped standing wall portion. When the cover body is slid, it is characterized in that a missing vertical wall portion is formed in order to avoid interference.

An annular standing wall portion that comes into contact with the wall material is formed on the peripheral edge of the hidden main body of the cover body, and a locked hole formed in the front side holding body and a locking hook projecting from the back surface of the cover body. In order to lock the portion, it is necessary to slide the cover body in the transverse direction with respect to the front side holding body, but when the difference between the length of the front side holding body and the diameter of the cover body is small, the cover body At the time of sliding, the annular standing wall portion interferes with the front side holding body. Therefore, as in the invention of claim 7, a standing wall missing portion for avoiding interference when the cover body is slid is formed in a part of the annular standing wall portion, so that the interference is avoided and the cover is already installed. The cover body is slid in the transverse direction with respect to the front side holding body, so that the locked hole of the front side holding body and the locking hook portion of the cover body can be locked.

The invention of claim 8 is the invention of claim 6 or 7, wherein on both sides of the locking hook portion on the back surface of the cover body, a locked hole of the front side holding body and a locking hook portion of the cover body are provided. It is characterized in that an anti-twisting protrusion is formed to prevent the cover body from being twisted with respect to the front side holding body in the locked state.

According to the invention of claim 8, since the cover body is not twisted with respect to the front side holding body which is fixed to the wall material, the front side holding body and the cover body are mutually formed only by the locking structure. Even though it is fixed, the cover body can be firmly fixed to the front side holding body.

The invention of claim 9 is characterized in that, in any of the inventions of claims 1 to 8, the covering portion of the cover body can fix the device with a tapping screw.

A new device may be fixed to the cover body that covers the through hole formed through the wall material. According to the invention of claim 9, in such a case, a tapping screw is used to fix the cover body. New equipment can be easily fixed to the device.

The invention of claim 10 is attached to a circular through hole formed in a wall material such as a ceiling wall, and constitutes a base for attaching a hidden cover body for closing the through hole and a seat for fixing a device. It is a base material component and
A back side holding body arranged on the back side of the wall material so as to cross the through hole,
A bolt body screwed into the female screw portion provided on the back side holding body, and
A front-side holding body that is arranged on the surface of the wall material so as to cross the through hole, is brought close to the back-side holding body by the rotation of the bolt body, and holds the wall material with the back-side holding body.
Consists of
With the back side and front side holding bodies integrated by the bolt body, the back side holding body can be arranged from the front side of the wall material to the back surface of the wall material.
The back side holding body or the front side holding body is provided with a slide regulating means for restricting movement with respect to the through hole by abutting against the inner surface of the through hole and maintaining a state of being crossed with respect to the through hole. ,
The slide regulating means is characterized in that it is provided so as to be able to select a plurality of positions along the transverse direction of the through hole in order to correspond to a plurality of types of through holes having an inner diameter .

According to the invention of claim 10, for example, in a state where the distance between the holding bodies on the back side and the front side is wider than the distance between holding the wall material, the holding bodies are integrated by the bolt body. A part of the back side holding body is arranged on the back side of the wall material by sliding it at an angle and relatively inserting a portion of the wall material facing the through hole between one end in the longitudinal direction of each holding body. Then, by making each of the integrated holding bodies horizontal and sliding them in the horizontal direction opposite to the inclined sliding direction, the entire back side holding body can be arranged on the back of the wall.
Further, the back side holding body or the front side holding body is provided with a slide regulating means that regulates the movement with respect to the through hole by contacting the inner surface of the through hole and maintains a state of being crossed with respect to the through hole. Therefore, since the slide regulating means is provided so as to be able to select a plurality of positions along the transverse direction of the through hole in order to correspond to a plurality of types of through holes having an inner diameter, each integrated holding body can be used. There is no risk of coming off from the opposite peripheral edge of the through hole in the wall material, and the amount of movement along the transverse direction of the through hole of each holding body can be minimized, and each of the plurality of through holes having different inner diameters can be used. The crossing state of the pinched body can be maintained.

It is an exploded perspective view which shows the arrangement relationship between the circular through hole H ₁ formed in the ceiling wall W, the holding bodies A ₁ and A ₂ on the back side and the front side, and the cover body K. In the back side and the holding member A ₁ of the front, A ₂ and the cover body K, circular through-hole H ₁ formed in the ceiling wall W is a perspective view of a state of being covered. (A) and (b) are a perspective view and a central vertical sectional view of the back side sandwiching body A ₁ , respectively. (A) and (b) are a perspective view and a central vertical sectional view of the front side sandwiching body A ₂ , respectively. (A) is a plan view of the cover body K, and (b) is a sectional view taken along line XX of (a). It is a top view of the state where the front side holding body A ₂ and the cover body K are locked and fixed. (A) and (b) are vertical cross-sectional views before and after locking of the locked hole 13 of the front side holding body A ₂ and the locking hook portion 23 of the cover body K, respectively. (A) and (b) show that the cross-sectional states of the back side and front side holding bodies A ₁ and A ₂ are maintained with respect to the through holes H ₂ and H _{3 having} different inner diameters, respectively. -Y line sectional view. (A), (b), and (c) are the peripheral edges of the through hole H ₁ of the ceiling wall W in a state where the back side and front side holding bodies A ₁ and A ₂ are temporarily assembled by two bolt bodies 42, respectively. It is sectional drawing which shows the intermediate process which holds and fixes to a part. (D) is a cross-sectional view of a state in which the cover body K is locked and fixed to the front side holding body A ₂ which is sandwiched and fixed to the peripheral edge of the through hole H ₁ of the ceiling wall W, and (e) is a cross-sectional view of the ceiling. It is sectional drawing in the state which the through hole H ₁ of the wall W is covered by the cover body K. In the steps (a) to (d), the back and front holding bodies A ₁ and A ₂ and the cover body K are integrally assembled in advance, and the through hole H ₁ of the ceiling wall W is covered with the cover body K. It is sectional drawing which shows sequentially. (A), (b), and (c) are inserted into the portion of the screw pilot hole 27 of the cover body K, the portion of the screw insertion hole 27'through which the screw pilot hole 27 is penetrated, and the screw insertion hole 27', respectively. It is sectional drawing of each part of the peripheral part of the cover body K fixed to the ceiling wall W by the screw 43. (A) is a perspective view of a cover body K'provided with a pair of elastic locking bodies 31, (b) is a plan view of the elastic locking body 31, and (c) is a front side holding body A ₂ '. It is a partially enlarged sectional view which shows the locking structure of the elastic locking body 31 of the cover body K with respect to the locked hole 15.

Hereinafter, the present invention will be described in more detail with reference to optimum examples. In the ceiling wall W, a through hole H _{1 in} which a conventional large-sized surveillance camera was installed remains open. Concealed cover device according to the present invention for covering the through hole H _1, as shown in FIGS. 1 to 5, the rear side holding member A disposed on the wall behind so as to traverse the through hole H ₁ sandwiching _1, is disposed parallel to the wall table with the back side holding member a ₁ in the same condition, the back side holding member a ₁ in cooperation with the opposed peripheral edge portions of the through hole H ₁ of the top wall W a front holding member a ₂ to than said through-hole H ₁ have a larger outer diameter, while covering the through hole H _1, locked and fixed via a fixing means to said front side holding member a ₂ It is composed of a circular cover body K to be formed. The back side and front side holding bodies A ₁ and A ₂ are both formed by press molding a metal plate, and the cover body K is formed by injection molding of a resin.

The back side and front side holding bodies A ₁ and A ₂ are both strip-shaped (rectangular shape with a large slenderness ratio), have the same length, and have through holes in the ceiling wall W at both ends in the longitudinal direction. The inner diameter (d ₁ ) of the through hole H ₁ is slightly longer than the inner diameter (see FIG. 7) so that the opposite edge portion of H ₁ can be sandwiched. In order to increase the flexural rigidity of the back side holding body A ₁ , both ends in the width direction of the flat plate are bent obliquely upward, and a plurality of both ends in the longitudinal direction of the holding body body 1 (4 in the embodiment). internally threaded portion 2 of the pieces) are formed at predetermined intervals along the longitudinal direction of the rear side holding member a _1. A pair of female screw portions 2 formed at positions corresponding to each other with respect to the center in the longitudinal direction of the back side holding body A ₁ are paired, and the pair of female screw portions 2 are the back side holding body A ₁ . It is arranged symmetrically with respect to the center in the longitudinal direction. Each headed screw 41 screwed into a pair of female threaded portions 2 forming a pair of the back side holding body A ₁ is arranged at a position close to the inner peripheral surface H ₁ a of the through hole H ₁ so that the back side holding body A ₁ is held. body a ₁ are arranged in the transverse state in the through hole H ₁ of the ceiling wall W.

The front side sandwiching body A ₂ is formed in a flat plate shape, and a pair of bolt body insertion holes through which a pair of bolt bodies 42 pass through a portion corresponding to a pair of female screw portions 2 which are paired on the innermost side of the sandwiching body main body 11. 12 is formed. The bolt body insertion hole 12 is formed in a decapitated conical shape corresponding to the dish shape of the head of the bolt body 42. Between the pair of bolt body insertion holes 12 in the front side holding body A _2, the entire two locking hook portions 23, which will be described later, provided in the cover body K are inserted from below, and the respective locking hook portions 23 are inserted. Two rectangular locked holes 13 that can be locked with each other are formed along the longitudinal direction. The two locking hook portions 23 are formed at the same position and facing the same direction with respect to the center C of the hidden main body portion 21 of the cover body K, but are formed in the locked holes 13 of the front side sandwiching body A _2. With the entire locking hook portion 23 of the cover body K inserted, the cover body K is slid with respect to the front side holding body A _{2 in} the longitudinal direction of the front side holding body A ₂ , and the front side holding body A is inserted. _{Since the} structure is such that each locking hook portion 23 of the cover body K is locked to each locked hole 13 of ₂ , the two locked holes 13 are provided with respect to the center of the holding body main body 11 in the longitudinal direction. It is formed so as to be offset from the slide locking direction P by the slide length S (see FIG. 7). Further, the end portion of the portion to be the front end side along the slide locking direction P in front holding member A _2, in order to maintain the engagement state between the front holding member A ₂ and the cover body K, the cover body A rectangular locking maintenance hole 14 into which the locking maintenance fitting protrusion 26 described later of K is fitted is formed.

The back side and front side holding bodies A ₁ and A ₂ are integrally connected by a pair of bolt bodies 42 screwed into the innermost pair of female threaded portions 2, and the bolt bodies 42 are tightened to tighten the back side. and the both end portions of the holding member a _1, a ₂ of the front side, by clamping the opposed peripheral edge portions of the through hole H ₁ of the ceiling wall W, the sandwiching of the rear and front a _1, a ₂ is a ceiling wall It is pinched and fixed to W. Specifically, the back side holding body A ₁ is arranged on the back side of the ceiling wall W in a transverse state with respect to the through hole H ₁ , and each of the front side holding bodies A ₂ arranged on the front side of the ceiling wall W Each bolt body 42 inserted into the bolt body insertion hole 12 is screwed into each female screw portion 2 of the back side holding body A ₁ which is paired on the innermost side, and each bolt body 42 is rotated and tightened. I'm raising it. As shown in FIG. 7, the head 42a of the bolt body 42 is formed in a dish shape, and the entire head 42a is a decapitated conical bolt body insertion hole formed in the front side holding body A _2. housed in 12, because it does not protrude on the surface of the front holding member a _2, it is possible to slide the cover body K against the front holding member a _2.

In the above state, the head 41 a of the head screw 41 screwed into each female screw portion 2 forming a pair of the back side holding body A ₁ is arranged close to the inner peripheral surface H ₁ a of the through hole H ₁ . Even if the holding forces A ₁ and A ₂ on the back side and the front side integrated by the pair of bolt bodies 42 loosen the holding force with respect to the ceiling wall W, the amount of sliding of the through hole H _{1 in} the transverse direction is Is regulated, so that the crossing states of the holding bodies A ₁ and A ₂ on the back side and the front side with respect to the through hole H ₁ are maintained. At the time of press molding, the prepared hole 3 is formed by cutting up the prepared hole, and the female threaded portion 2 is formed up to the portion of the raised portion 3, so that the female threaded portion 2 is formed. Can be made longer than the plate thickness of the back side holding body A ₁ .

The circular cover body K has a diameter slightly larger than the lengths of the holding bodies A ₁ and A _{2 on} the back side and the front side, and an annular standing wall portion 22 is formed on the peripheral edge of the back surface of the cover body K. The two locking hooks 23 are integrally formed at positions symmetrical with respect to the center C on the back surface of the cover body K so as to face the same direction. The hidden main body portion 21 refers to a portion of the circular cover body K that substantially covers the through hole H ₁ , in other words, the annular shape of the outer peripheral portion of the cover body K that overlaps with the ceiling wall W. Refers to most of the rest except the part. That is, as shown in FIGS. 1 and 8, the locking hook portion 23 is L-shaped in the front view and square in the plan view, and constitutes the locking hook portion 23. The locking plate portion 23a is an upright portion so as to be parallel to the back surface of the hidden main body portion 21 at a distance equivalent to the plate thickness of the front side holding body A ₂ between the locking plate portion 23a and the back surface of the hidden main body portion 21. It is integrally provided in the hidden main body 21 via 23b.

On the diagonally outer sides of each locking hook 23 on the back surface of the hidden main body 21 of the cover body K, in cooperation with the back side holding body A ₁ , the front side holding body A ₂ sandwiched and fixed to the ceiling wall W On the other hand, when the cover body K is locked and fixed, two sets of twist prevention which are one-to-one in a facing arrangement state to prevent the cover body K from being twisted with respect to the front side holding body A ₂ . The plate portions 24 are erected respectively. The one-to-one pair of anti-twist plate portions 24 are arranged parallel to each other at a distance slightly wider than the width of the front side holding body A ₂ while maintaining parallel to the side surface of the locking hook portion 23. Further, by sliding the cover body K with respect to the front side holding body A _{2 in} the direction along the side surface of the locking hook portion 23, the cover body K with respect to the locked hole 13 of the front side holding body A ₂ The locking hook portion 23 is locked, and when the cover body K is slid, the end portion in the longitudinal direction of the front side sandwiching body A ₂ and the two locking hook portions on the annular vertical wall portion 22 of the cover body K are each locked. Since the extension line of the line segment connecting the center points in the width direction of 23 and the intersecting portion interfere with each other, the portion of the annular standing wall portion 22 that interferes with the front side holding body A ₂ is omitted to form the standing wall missing portion 25. ing. Further, in order to maintain the state in which the cover body K is locked and fixed to the front side holding body A ₂ , it is on an extension line of a line segment connecting the center points of the two locking hook portions 23 in the width direction of the cover body K. Is formed with a locking maintenance fitting protrusion 26 that fits with the locking maintenance hole 14 of the front side holding body A ₂ .

As shown in FIG. 11, the cover body K is used on the surface of the ceiling wall W on the outside of the hidden main body 21 on the back surface of the cover body K and on the inside of the annular vertical wall portion 22. The screw pilot holes 27 for fixing the holes 27 are formed in a non-penetrating state at equal intervals along the circumferential direction while avoiding the portion of the vertical wall missing portion 25. In particular, when the surveillance camera is attached to the cover body K that closes the through holes H ₁ (H ₂ , H ₃ ) of the ceiling wall W, the surveillance camera itself is inserted into the insertion hole or connected to the surveillance camera. It is necessary to form an insertion hole in the cover body K through which the cable is inserted, and the operator inserts the ceiling wall W in a state where the through holes H ₁ (H ₂ , H ₃ ) are closed by the cover body K. It is difficult and dangerous to perform the drilling work on the cover body K in an unstable posture facing the cover body K. However, the present invention is a base material component B that is attached to the facing peripheral edge portion of the ceiling wall W facing the through holes H ₁ (H ₂ , H ₃ ) and functions as a base material for attaching the cover body K. Since the pair of holding bodies A ₁ and A ₂ and the cover body K attached to the front side holding body A ₂ are separate bodies, the cover body K already attached is removed before attaching the cover body K. Therefore, the drilling work of the insertion hole can be performed by the operator, or the drilling work of the insertion hole can be facilitated by using the cover body in which the insertion hole is provided at the preset position, or the drilling work itself is unnecessary. There is an advantage that becomes.

Then, as described above, in a state where the holding member A ₁ in the back and front with respect to the through hole H ₁ of the ceiling wall W, A ₂ is sandwiched and fixed, each of the locking holes of the front holding member A ₂ 13 keep in place the locking hook 23 of the cover body K directly below the, as shown in FIG. 7 (a), each of the engaging hole 13 of the front holding member a _2, the cover body K The cover body K is moved to the slide locking direction P with the locking hook portions 23 being inserted through the locking hook portions 23 and the locking hook portions 23 being arranged between the holding bodies A ₁ and A ₂ on the back side and the front side. When the slide length S is slid, as shown in FIG. 7B, in each gap between the locking plate portion 23a of each locking hook portion 23 of the cover body K and the back surface of the cover body K. , corresponding the fitted locking plate of the front holding member a to be fitted locking plate portion 11a between each of the engaging hole 13 in ₂ (see FIG. 4) and the side of the engaging hole 13 of the engagement maintaining hole 14 Each of the portions 11b (see FIG. 4) is fitted, and the locking maintenance fitting protrusion 26 of the cover body K is fitted into the locking maintenance hole 14 of the front side holding body A ₂ to form the ceiling wall W. The through hole H ₁ is covered by the cover body K. As a result, unless the front side holding body A ₂ and the cover body K are integrated in the fitted state and a large impact force is applied to the cover body K in the anti-slide locking direction, the above-mentioned fitting state Is maintained.

Further, if it becomes necessary to remove the cover body K for some reason after covering the through hole H ₁ of the ceiling wall W with the cover body K, the slide locking direction with respect to the cover body K. By applying an impact force in the direction opposite to P to the cover body K, the mating state between the locking maintenance hole 14 of the front side holding body A ₂ and the locking maintenance fitting protrusion 26 of the cover body K is released. The cover body K can be removed from the front side holding body A ₂ without damaging the peripheral edge of the through hole H ₁ in the ceiling wall W.

The cover body K not only covers the through hole H ₁ remaining for installing the conventional surveillance camera, but also when installing a new device such as a surveillance camera at the same location on the ceiling wall W. It is also used as a member for attaching the device by fixing with screws. Since the cover body K is made of resin, it is possible to fix a new device with a screw by using a tapping screw.

Further, the cover body K is fixed to the front side holding body A ₂ by the two locking hook portions 23 provided on the cover body K and the two locked holes 13 provided on the front side holding body A ₂ . Since it has a locking structure, the front side holding body A ₂ and the cover body K are integrated by a large locking fixing force. However, as described above, when a new device is attached to the cover body K, or when it is desired to increase the fixing strength of the cover body K to the ceiling wall W, further, the outer peripheral side surface of the cover body K and the surface of the ceiling wall W In the case of preventing the generation of a gap between the two, the screw 43 is inserted into the screw insertion hole 27'through which the plurality of non-penetrating screw pilot holes 27 are penetrated, and the screw 43 is inserted into the ceiling wall W. By screwing in, the peripheral edge of the cover body K can be directly fixed to the ceiling wall W by a plurality of screws 43.

The inner diameter d ₁ of the through hole H ₁ is the maximum diameter that can be covered by the through hole concealment cover device according to the present invention, and in this state, the back side and front side holding bodies A ₁ and A ₂ are placed. The distance (L ₁ ) between the pair of bolt bodies 42 that are integrally connected and fixed and the longitudinal edge of the back side holding body A ₁ is screwed into each pair of female threaded portions 2 on the outermost side. The distance (L ₂ ) between the headed screw 41 and the edge of the back side holding body A ₁ along the longitudinal direction is about 3.5 times [see FIG. 7 (b)]. By the connecting and fixing structure of the holding bodies A ₁ and A _{2 on} the back side and the front side, they are integrally connected by a pair of bolt bodies 42, and both ends are supported at each part facing the opposite peripheral edge portion of the through hole H ₁ in the ceiling wall W. By increasing the connecting strength of the central portion of each of the sandwiching bodies A ₁ and A ₂ along the longitudinal direction, the cover body K that covers the through hole H ₁ can be stably supported, and the cover body K can be stably supported. When another device is attached to the ceiling, the support of the other device becomes stable. From the viewpoint of stably supporting the cover body K or another device attached to the cover body K, the ratio of (L ₁ / L ₂ ) is preferably 2 or more.

Further, when the inner diameter d ₂ (d ₃ ) of the through hole H ₂ (H ₃ ) formed in the ceiling wall W is smaller than the inner diameter d ₁ (d ₁ > d ₂ > d ₃ ), the figure is shown in the figure. As shown in 8 (a) and 8 (b), it is formed as a pair with the back side holding body A ₁ and is used in the through hole H ₁ as the female screw portion 2 screwed with the bolt body 42. By selecting the female threaded portion 2 inside the female threaded portion 2, the same through-hole concealment cover device can be used to pinch the back and front sides of the through holes H ₁ (H ₂ , H ₃ ) having different inner diameters. It is possible to cover a plurality of through holes H ₁ (H ₂ , H ₃ ) having different inner diameters while maintaining the crossing state of the bodies A ₁ and A ₂ .

Further, in the above, in the case of holding and fixing the back side and front side holding bodies A ₁ and A ₂ with respect to the ceiling wall W, the back side holding body A ₁ is crossed with respect to the through hole H ₁ on the back side of the ceiling wall W. Each bolt body 42 inserted into each bolt body insertion hole 12 of the front side holding body A ₂ arranged on the front side of the ceiling wall W is held on the innermost pair on the back side. Each bolt body 42 is screwed into each female thread portion 2 of the body A ₁ to rotate and tighten the bolt body 42, but the following procedure may also be used.

That is, as shown in FIGS. 9-A (a) and 9-A (b), the distance E between the facing inner surfaces of the back side and front side holding bodies A ₁ and A ₂ is a predetermined amount larger than the wall thickness T of the ceiling wall W. The back side and front side holding bodies A ₁ and A ₂ are temporarily connected via a pair of bolt bodies 42 so as to increase (E> T). The back side and front side holding bodies A ₁ and A ₂ temporarily connected via the pair of bolt bodies 42 are the base material constituent members B defined in claim 10. In this state, each of the temporarily connected holding bodies A ₁ and A ₂ is tilted and slid in a state of being tilted by a predetermined angle, and between the holding bodies A ₁ and A ₂ at _one end thereof, the other side. the end by a length that can be fully inserted into the through hole H _1, is relatively inserted a portion facing the through-hole H ₁ of the ceiling wall W. Next, each of the holding bodies A ₁ and A ₂ is made parallel to the ceiling wall W and slid horizontally, and penetrates in the ceiling wall W between the other ends of the holding bodies A ₁ and A _2. After the other facing portion facing the hole H ₁ is relatively inserted, each bolt body 42 is rotated, and the through holes H in the ceiling wall W are formed by both ends of the holding bodies A ₁ and A _{2 on} the back side and the front side. The peripheral edge of the opening of ₁ is sandwiched [FIGS. 9-A (b), (c)]. Even during the sliding operation of the temporarily connected holding bodies A ₁ and A ₂ , the pair of headed screws 41 screwed into the back side holding bodies A ₁ still form the inner peripheral surface H ₁ a of the through hole H _1. The transverse state of each of the sandwiching bodies A ₁ and A ₂ with respect to the through hole H ₁ is maintained. Each bolt body 42 needs to have a length that allows the back side and front side holding bodies A ₁ and A ₂ to be temporarily connected as described above. After that, the cover body K is locked and fixed to the front side holding body A ₂ which is held and fixed to the ceiling wall W in cooperation with the back side holding body A ₁ by the same method as described above [FIG. 9-]. B (d), (e)].

Further, as shown in FIG. 10, a state in which the back side and front side holding bodies A ₁ and A ₂ are temporarily connected as described above, and the cover body K is locked and fixed to the front side holding body A ₂ . By setting this, the through hole H ₁ can be closed by the cover body K through the same procedure as described above. In this case, the integrated sandwiching bodies A ₁ , A ₂ and the cover body K are suspended from the back surface of the ceiling wall W via the back side sandwiching body A ₁ , so that the ceiling wall W Although a predetermined gap is formed between the surface and the front side holding body A ₂ , the original purpose of covering the through hole H ₁ left in the ceiling wall W by the cover body K is achieved.

Further, in the above-mentioned locking and fixing structure of the cover body K with respect to the front side holding body A ₂ , after covering the through hole H ₁ of the ceiling wall W with the cover body K, if necessary, the cover body K is covered. Although it has the advantage of being removable, the following locking and fixing structure may be used when it is not necessary to remove the cover body K. For example, as shown in FIG. 12, a pair of elastic locking bodies 31 are integrally formed on the back surface of the cover body K'at a predetermined interval along the diameter direction, and the pair is formed on the front side holding body A ₂ '. The structure may be such that a pair of locked holes 15 are formed at the same interval as the formation interval of the elastic locking body 31 of the above. The elastic locking body 31 has a plurality of (three in the embodiment) elastic locking pieces 33 in the shape of an umbrella on the top of the pillar portion 32 integrally formed perpendicular to the back surface of the cover body K'. Is a configuration provided with. When each elastic locking body 31 of the cover body K'is inserted into each locked hole 15 of the front side sandwiching body A ₂ ', the plurality of elastic locking pieces 33 of each elastic locking body 31 are elastically deformed inward. After penetrating each locked hole 15, the original shape is restored, and the lower end surface of each elastic locking piece 33 is elastically contacted with the back surface of the cover body K', so that the front side holding body A ₂ ' The cover body K'is locked and fixed via a pair of elastic locking bodies 31 integrally formed with the cover body K'. If the required locking and fixing force cannot be secured only by locking and fixing with the pair of elastic locking bodies 31, fixing of a plurality of screws 43 to be inserted into the screw insertion holes 27'as described above. You can use force together.

Further, in the above embodiment, the back side and front side holding bodies A ₁ and A ₂ holding the ceiling wall W in a state of being integrated by the bolt body 42 are through holes H ₁ (H ₂ , H ₃ ). As a slide regulating means for restricting sliding beyond the set length in the transverse direction of, a plurality of female threaded portions 2 formed on the back side holding body A ₁ and a head screwed into one of the female threaded portions 2 An example has been shown in which the slides are composed of the screws 41 and can correspond to a plurality of through holes H ₁ (H ₂ , H ₃ ) having different inner diameters, but the slide regulating means is not limited to the above configuration. For example, screws are screwed into all of the plurality of female screw portions 2 formed on either the back side or the front side holding bodies A ₁ and A ₂ so that the tips do not protrude, and the through holes H are formed. _By further screwing only the necessary screws corresponding to the inner diameter of ₁ (H ₂ , H ₃ ), the tip may be projected and the protruding portion may be used as a slide regulating means, or the back side or the front side. Plastically deformable deformable pieces are formed at a plurality of locations along the transverse direction of either _{one of} the sandwiching bodies A ₁ and A ₂ , and only the deformable pieces at the necessary locations are plastically deformed to form the through hole H. _It may be configured to abut on the inner peripheral surface of ₁ (H ₂ , H ₃ ). Further, in the above embodiment, the head screw 41 is screwed into the two female screw portions 2 paired with each other, but one side is immovable and only the screwing position on the other side can be changed. Alternatively, the bolt body 42 that connects and integrates the holding bodies A ₁ and A ₂ may also be used as the slide regulating means.

The through hole to be covered by the through hole concealment cover device of the present invention is not limited to the ceiling wall, and even a through hole provided in another wall material such as a side wall should be covered in the same manner. Can be done.

A ₁ : Back side holding body A ₂ , A ₂ ': Front side holding body
B: Base material constituent members d _{1 to} d ₃ : Inner diameter of through hole H _{1 to} H ₃ : Through hole H ₁ a to H ₃ a: Inner peripheral surface of through hole K, K': Cover body
W: Ceiling wall (wall material)
1: The holding body of the back holding body
2: Female thread part
11: Holding body main body of the front holding body 13, 15: Locked hole
21: Hidden body
22: Circular wall
23: Locking hook
24: Anti-twist plate (anti-twist protrusion)
25: Missing part of the standing wall
31: Elastic locking body
41: Head screw (slide regulation means)
42: Bolt body

Claims (10)

A through-hole concealment cover device for covering a circular through-hole formed in a wall material such as a ceiling wall.
A back side holding body arranged on the back side of the wall material so as to cross the through hole,
It is arranged on the surface of the wall material so as to cross the through hole, and is brought close to the back side holding body by the rotation of the bolt body screwed into the female screw portion provided on the back side holding body, and is brought close to the back side holding body. The front side holding body that holds the wall material and
A cover body having a hidden main body portion that is fixed to the front side holding body via a fixing means, is formed larger than the through hole, and hides the through hole while covering the entire front side holding body.
A through-hole concealment cover device characterized by being equipped with. The back side holding body or the front side holding body is provided with a slide regulating means for restricting movement with respect to the through hole by abutting against the inner surface of the through hole and maintaining a state of being crossed with respect to the through hole. The through-hole concealment cover device according to claim 1, wherein the cover device is provided. The through hole according to claim 2, wherein the slide regulating means is provided so as to be able to select a plurality of positions along the transverse direction of the through hole in order to correspond to a plurality of types of through holes having an inner diameter. Hidden cover device. The back side holding body or the front side holding body is provided with a plurality of female screw portions to which movement control screws, which are slide restricting means, are screwed along the transverse direction, according to claims 1 to 3. The through-hole concealment cover device according to any one of. The through-hole concealment cover device according to claim 4, wherein the head of the movement restricting screw comes into contact with the inner peripheral surface of the through-hole. The fixing means is projected from a locked hole formed through the front side holding body and the back surface of the cover body, and slides the front side holding body with respect to the cover body in the transverse direction. The through-hole concealment cover according to any one of claims 1 to 5, wherein the locked hole is locked or the lock is released, and the cover is composed of an L-shaped locking hook portion in a front view. apparatus. An annular standing wall portion is projected from the peripheral edge of the hidden main body portion of the cover body toward the wall material, and a part of the annular standing wall portion is missing in order to avoid interference when the cover body is slid. The through-hole concealment cover device according to claim 6, wherein a vertical wall missing portion is formed. On both sides of the locking hook portion on the back surface of the cover body, the cover body is twisted with respect to the front side holding body in a locked state between the locked hole of the front side holding body and the locking hook portion of the cover body. The through-hole concealment cover device according to claim 6 or 7, wherein a twist-preventing protrusion is formed to prevent the cover from being damaged. The through-hole concealment cover device according to any one of claims 1 to 8, wherein an apparatus can be fixed to the cover portion of the cover body by a tapping screw. It is a base material component that is attached to a circular through hole formed in a wall material such as a ceiling wall and constitutes a base for attaching a hidden cover body that closes the through hole and a seat for fixing equipment. ,
A back side holding body arranged on the back side of the wall material so as to cross the through hole,
A bolt body screwed into the female screw portion provided on the back side holding body, and
A front-side holding body that is arranged on the surface of the wall material so as to cross the through hole, is brought close to the back-side holding body by the rotation of the bolt body, and holds the wall material with the back-side holding body.
Consists of
With the back side and front side holding bodies integrated by the bolt body, the back side holding body can be arranged from the front side of the wall material to the back surface of the wall material.
The back side holding body or the front side holding body is provided with a slide regulating means for restricting movement with respect to the through hole by abutting against the inner surface of the through hole and maintaining a state of being crossed with respect to the through hole. ,
The base material constituent member is characterized in that the slide regulating means is provided so as to be able to select a plurality of positions along the transverse direction of the through holes in order to correspond to a plurality of types of through holes having an inner diameter .

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