JP2020122274A - Fall prevention member for inspection panel and inspection port device including the same - Google Patents

Abstract

To make it easy to remove an inspection panel and prevent it from falling as well.SOLUTION: An inspection panel fall prevention member 1 includes: a panel side fixing portion 2 attached to a back surface of an inspection panel; a skeleton side fixing portion 3 attached to a predetermined fixed object around an inspection port; and a main body portion 4 connecting the skeleton side fixing portion 3 and the panel side fixing portion 2. The main body portion 4 integrally includes: a first shock absorbing portion 11; a second shock absorbing portion 13; a first linear portion 12 provided between both shock absorbing portions 11 and 13; and a second linear portion 14 provided between the second shock absorbing portion 13 and the skeleton side fixing portion 3. The first and second linear portions 12 and 14 have a shape closer to a straight line than the first and second shock absorbing portions 11 and 13 in a natural state, and the first and second shock absorbing portions 11 and 13 have constant bent shapes in the natural state, and can be deformed in a direction to release the bent as well, when a tensile force corresponding to its own weight of the inspection panel is applied.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to an inspection panel fall prevention member that is detachably attached to a position that closes an inspection entrance of a building and that prevents the inspection panel from falling, and an inspection entrance device including the fall prevention member.

An inspection port device may be provided on a side wall, a ceiling, a floor, etc. of a building such as a house, an apartment house, a building (hereinafter, these are collectively referred to as a wall material). The inspection port device is used to inspect the condition of various equipment such as pipes, machinery, and electrical equipment that are located on the back side of the wall material, and has an inspection panel that can open and close the inspection port to access the equipment. ing.

Patent Document 1 below discloses an inspection port device provided with a measure for preventing the inspection panel from involuntarily falling. Specifically, in the inspection port device of Patent Document 1, a fall prevention member (fall prevention member) that connects the fixed object (for example, a base material arranged on the back surface of the wall) around the inspection port and the inspection panel to each other is provided. Device) is installed. The fall prevention member is a panel-side fixed part that is attached to the back surface of the inspection panel, a skeleton-side fixed part (wall-side fixed part) that is attached to a predetermined fixed object around the inspection port, a panel-side fixed part and a skeleton-side fixed part. And a body part (connecting part) for integrally connecting and. Most of the main body portion is an energy absorbing portion that is spirally wound (or is formed to meander repeatedly on the same plane) so as to function as a tension coil spring. By elastically expanding and deforming when the inspection panel is dropped, it exerts a function of mitigating the impact transmitted to both the fixing portions (panel-side fixing portion, skeleton-side fixing portion).

JP, 2017-128973, A

According to the fall prevention member of Patent Document 1, the impact applied to both fixing portions when the inspection panel is dropped is relaxed, so that the fixing portion is separated from the counterpart member (that is, the connection by the fall prevention member is released. It is said that this is avoided and the reliability of the fall prevention member is enhanced.

However, in Patent Document 1, the energy absorbing portion that is spirally wound (or is formed to meander repeatedly) is shrunk in a natural state, and the elastic restoring force of the energy absorbing portion is strong. Therefore, it was necessary to pull the inspection panel with a relatively strong force in order to open the inspection panel widely (separate it largely from the inspection port). In addition, when the inspection panel is inadvertently dropped, the inspection panel that has once fallen is pulled up vigorously by the elastic force of the energy absorbing unit and then falls again.As a result, the behavior of the inspection panel is not stable. It was

The present invention has been made in view of the above circumstances, and is provided with a fall prevention member for an inspection panel capable of achieving both ease of handling when removing the inspection panel and prevention of fall of the inspection panel, and the same. The purpose is to provide an inspection port device.

As a means for solving the above problems, a fall prevention member according to one aspect of the present invention is a fall prevention member for preventing the fall of an inspection panel detachably attached to a position that closes an inspection opening of a building. There is a panel-side fixing portion that is attached to the back surface of the inspection panel, a body-side fixing portion that is attached to a predetermined fixed object around the inspection opening, and a body that connects the body-side fixing portion and the panel-side fixing portion. And a first shock absorbing part, a second shock absorbing part, a first linear part provided between the first shock absorbing part and the second shock absorbing part, and a second shock absorbing part. It integrally has a second linear part provided between the shock absorbing part and the body side fixing part, and the first linear part and the second linear part in the natural state are the first shock absorbing part and the second linear part. The second shock absorbing portion has a shape closer to a straight line than the second shock absorbing portion, and the first shock absorbing portion and the second shock absorbing portion have a constant bent shape in a natural state, and a tensile force corresponding to the own weight of the inspection panel. When is applied, it can be deformed in a direction to release the bending (claim 1).

According to the present invention, since the inspection panel is connected to the predetermined fixed object around the inspection port via the fall prevention member, it is assumed that the inspection panel is inadvertently removed from its mounting position (position that closes the inspection port). Also, it is possible to prevent the inspection panel from being completely dropped because the inspection panel is suspended by the fall prevention member.

Further, the main body portion of the fall prevention member has a bent first shock absorbing portion and a bent second shock absorbing portion provided at a position separated from the first shock absorbing portion, so that the weight of the inspection panel can be reduced. Since each impact absorbing part can be deformed in the direction to release its bending according to the corresponding pulling force, even if the inspection panel involuntarily falls and is suspended by the fall prevention member. The impact applied to the main body portion due to the fall can be absorbed by the deformation of each impact absorbing portion. This makes it difficult for the panel-side fixing portion or the body-side fixing portion to separate from the mating member or the fall prevention member to be cut in the middle, so that the reliability of the fall prevention member can be increased. The safety of the inspection port device can be improved.

Further, the first and second impact absorbing parts are provided at positions separated from each other, and the strength of each is set to such a degree that it is deformed under the weight of the inspection panel (not too high than necessary). Therefore, the restoring force exerted by both shock absorbing parts when they are deformed is also relatively weak. Therefore, it is possible to suppress the unstable behavior in which the inspection panel that has once dropped and is in a suspended state is pulled up again by the restoring force of both shock absorbing portions. In addition, since the impact absorbing parts have weak restoring force, the operator can sufficiently separate the inspection panel from the inspection port without pulling the inspection panel with a particularly strong force when opening the inspection port. .. As a result, the handling of the inspection panel can be improved, and the efficiency of the inspection work through the inspection port can be improved.

Preferably, the main body portion is formed so as to extend in the first direction from the panel side fixing portion as a whole in a natural state and then extend back to the body side fixing portion while being folded back in the opposite second direction. The first shock absorbing portion is formed at a connecting portion between the main body portion and the panel side fixing portion, and the second shock absorbing portion is formed at a folded portion of the main body portion from the first direction to the second direction. The first linear portion is formed to extend in the first direction from the first impact absorbing portion toward the second impact absorbing portion, and the second linear portion extends from the second impact absorbing portion. It is formed so as to extend in the second direction toward the body-side fixing portion (claim 2 ).

In this way, when the main body portion is formed to have a substantially U-shape in the natural state, the panel side fixing portion is kept while the main body portion is kept in a shape close to the natural state (that is, a shape close to the U-shape). Can be attached to the back side of the inspection panel and the body side fixing part can be attached to the periphery of the inspection port. As a result, the efficiency of the work of attaching the fall prevention member can be improved.

Moreover, since the first shock absorbing portion is formed at the connecting portion between the main body portion and the panel side fixing portion, and the second shock absorbing portion is formed at the folded portion of the main body portion from the first direction to the second direction. Therefore, it is possible to more effectively prevent the fall prevention member from being cut by the impact when the inspection panel is dropped. That is, in the main body part, the connecting part with the panel side fixing part and the folding part from the first direction to the second direction are considered to be easily affected by the impact when the inspection panel is dropped. According to the above-mentioned configuration in which the shock absorbing portions are arranged in the respective portions, it is possible to effectively prevent the respective portions from being cut when the inspection panel is dropped, and it is possible to further enhance the reliability of the fall prevention member. ..

In the above structure, more preferably, the first linear portion includes a first linear portion linearly extending from the first impact absorbing portion in a first direction, and the first linear portion and the second impact absorbing portion. A first arc-shaped portion that is provided between the first shock absorbing portion and the second shock absorbing portion, and has a curvature radius larger than that of the bent portion of the first shock absorbing portion, and the second linear portion is fixed to the skeleton side. A second straight portion linearly extending from the portion in the first direction, and a bent portion of the first shock absorbing portion and the second shock absorbing portion that is provided between the second straight portion and the second shock absorbing portion. And a second arcuate portion curved in an arc shape with a larger radius of curvature (claim 3).

As described above, the first linear portion and the second linear portion have a linearly extending portion and an arcuately curved portion with a relatively large radius of curvature (a radius of curvature larger than the bending portion of the shock absorbing portion). When formed, the main body is formed in a U-shape as a whole as described above, and at a portion of the main body excluding the first and second shock absorbing portions, an excessive impact absorption capacity (in other words, shape retention). It is possible to avoid the provision of force), and it is possible to ensure good handleability of the fall prevention member.

In the above configuration, more preferably, the panel-side fixing portion, the skeleton-side fixing portion, and the main body portion are integrally formed of resin, and both axial end portions of the first linear portion and the second linear portion. Enlarged portions each having an enlarged cross-sectional area are formed at both end portions in the axial direction of (4).

According to this configuration, when the fall prevention member is molded by injection molding, for example, the resin is made to flow from the positions corresponding to the plurality of enlarged portions having enlarged cross-sectional areas, thereby smoothing the resin flow and preventing the fall prevention member. The moldability of can be improved. Further, the enlarged portions at both ends of the first straight portion and the enlarged portion on one side of the second straight portion are between the first shock absorbing portion and the first straight portion, and between the first straight portion and the first arc-shaped portion. Between the second linear portion and the second arc-shaped portion, and located at the inflection point that is the boundary between the linear portion and the curved portion, the inflection when the inspection panel falls. It is possible to effectively prevent the cutting from occurring at the point, and it is possible to further enhance the reliability of the fall prevention member.

When one side in the direction orthogonal to the first direction or the second direction is the third direction and the other side is the fourth direction, the first shock absorbing portion is bent to be convex in the third direction. The second shock absorbing portion is formed so as to continuously have a portion and a portion that is bent so as to be convex in the fourth direction, and the second shock absorbing portion has a portion that is bent so as to be convex in the second direction. Is preferred (Claim 5).

According to this configuration, when the inspection panel is dropped, the convexly bent portions of the first and second impact absorbing portions are deformed so as to open, thereby effectively absorbing the impact caused by the self-weight of the inspection panel. can do.

An inspection port device according to another aspect of the present invention includes an inspection panel detachably attached to a position that closes an inspection port of a building, and the above-described inspection panel fall prevention member (claim) 6).

As described above, according to the inspection panel fall prevention member and the inspection port device of the present invention, it is possible to achieve both ease of handling when removing the inspection panel and prevention of the inspection panel from falling.

It is a sectional view of an inspection port device concerning one embodiment of the present invention. It is a perspective view of the said inspection port apparatus. It is a perspective view of a fall prevention member applied to the inspection port device. It is a top view of the fall prevention member. It is a side view of the fall prevention member. It is a front view of the said fall prevention member. FIG. 3 is a view corresponding to FIG. 2 showing a state in which an inspection panel of the inspection port device comes off the frame member and falls. It is a perspective view showing a state of a fall prevention member after the inspection panel has dropped.

1 and 2 are a sectional view and a perspective view showing a schematic configuration of an inspection port device 50 according to an embodiment of the present invention. An inspection port device 50 shown in this figure is a device for opening and closing an inspection port C formed on a wall member 60 that divides the room from the outside, and is a rectangular frame-shaped frame member that forms the contour of the inspection port C. 51, an inspection panel 52 that is detachably attached to the frame member 51 to close or open the inspection port C, and a fall prevention member 1 that supports the inspection panel 52 when the inspection panel 52 falls. The wall material 60 in the present embodiment is a wall (side wall) that defines the side surface of the indoor space, the front side of the paper surface of FIG. 1 (upper side of FIG. 2) is the ceiling side, and the back side of the paper surface of FIG. 1 (lower side of FIG. 2). Side) is the floor side.

A pair of base materials 61 extending in the vertical direction is arranged on the back surface (surface on the outdoor side) of the wall material 60 (however, one base material 61 is omitted in FIG. 2). The inspection port C is formed by notching a part of the wall member 60 in the vertical direction between the pair of base materials 61. The frame member 51 is arranged inside the cutout region of the wall member 60, and the left and right sides of the frame member 51 are fixed to the respective base members 61 via screws or the like, so that the outline of the inspection port C is defined. It is attached to the forming position. The base material 61 corresponds to an example of "a predetermined fixed object around the inspection port" in the present invention.

The inspection panel 52 is a rectangular plate member having an area capable of closing the inspection port C. The inspection panel 52 is detachably mounted in a storage recess 51a formed on the indoor side of the frame member 51.

A cover member 53 (FIG. 1) that is opened and closed when the inspection panel 52 is attached and detached is attached to the frame member 51. The cover member 53 is coupled to the frame member 51 via a hinge portion 53a made of a soft resin, and can be opened and closed in a mode as shown in a partially enlarged view (a region surrounded by a chain line circle) in FIG. Has been done.

3 to 6 are views showing the fall prevention member 1 alone, and are diagrams for explaining the shape of the fall prevention member 1 in a natural state (a state where no external force is applied). As shown in FIGS. 3 to 6 and FIGS. 1 and 2, the fall prevention member 1 includes a panel side fixing portion 2 attached to the back surface of the inspection panel 52 and a body side fixing portion attached to the base material 61. 3 and a main body portion 4 that connects the skeleton side fixing portion 3 and the panel side fixing portion 2 are integrally provided.

The fall prevention member 1 (the panel-side fixing portion 2, the skeleton-side fixing portion 3, and the main body portion 4) is an integral resin molded product, and is formed by injection molding a resin material. As the resin material, a resin material having both flexibility and strength (shape retention) is suitable, and for example, polyamide resin such as 6 nylon (PA6) can be preferably used. In addition, an olefin resin such as polyethylene or polypropylene, or a polyester resin such as PET can be used as the material of the fall prevention member 1.

The panel-side fixing portion 2 has a rectangular sheet shape, and is fixed to the central portion of the back surface (outdoor surface) of the inspection panel 52, for example, with a double-sided tape (not shown).

As shown in FIGS. 3 and 4, the skeleton-side fixing portion 3 has a continuous long hole-shaped small-diameter portion having a small opening width and a circular large-diameter portion having a diameter larger than the width of the small-diameter portion. It has an engagement hole 3a (so-called Daruma hole). In the skeleton-side fixing portion 3, the head of the screw member 7 (see FIGS. 1 and 2) screwed in advance on the inner surface of either the left or right base material 61 is inserted into the large diameter portion of the engagement hole 3a. It is fixed to the base material 61 by being passed through the small diameter portion later.

As shown in FIGS. 3 and 4, the main body portion 4 is formed so as to extend generally in a U shape on the same plane in a natural state. That is, when the direction away from the back surface of the panel-side fixing portion 2 in the direction perpendicular to the surface is the first direction and the opposite direction is the second direction, the body portion 4 moves from the panel-side fixing portion 2 in the first direction. After extending, it is formed so as to extend to the body-side fixing portion 3 while being folded back in the second direction on the opposite side.

More specifically, the main body part 4 has a first shock absorbing part 11, a first linear part 12, and a second shock absorbing part along a U-shaped path from the panel side fixing part 2 to the body side fixing part 3. 13 and the second linear portion 14 are integrally provided in this order.

The first shock absorbing portion 11 is coupled to the panel side fixing portion 2. When one side in the direction orthogonal to the first direction or the second direction is the third direction and the other side is the fourth direction, the first shock absorbing portion 11 is bent so as to be convex in the third direction. It has a convex portion 11a and a second convex portion 11b bent so as to be convex in the fourth direction. As shown in FIG. 4, when the reference line X is a line extending from the connecting position of the first shock absorbing portion 11 and the panel-side fixing portion 2 in the direction perpendicular to the surface, the first convex portion 11a has one of the reference lines X. Is formed so as to project in a U shape on the side (the third direction side), and the second convex portion 11b is formed so as to project in a U shape on the other side (the fourth direction side) of the reference line X. There is. The 1st convex part 11a and the 2nd convex part 11b are mutually continuous in the reference line X, centering on the position on the said reference line X (intersection X1 of the center line of the 1st shock absorption part 11 and the reference line X). It is formed to have point symmetry.

The second impact absorbing portion 13 is formed at a position farthest from the panel-side fixing portion 2 and the skeleton-side fixing portion 3 in the first direction, that is, at the folded portion of the main body portion 4 from the first direction to the second direction. .. The second shock absorbing portion 13 is formed on both sides of the convex portion 13a bent in a U shape so as to be convex in the second direction and the base end portion (end portion on the first direction side) of the convex portion 13a. It has a pair of legs 13b1 and 13b2. When the leg portion 13b1 on the third direction side is the first leg portion and the leg portion 13b2 on the fourth direction side is the second leg portion, the first leg portion 13b1 is the third end from one of the base end portions of the convex portions 13a. The second leg 13b2 is formed to extend in the fourth direction from the other of the base ends of the protrusions 13a. More specifically, the first leg portion 13b1 is formed so as to extend in the third direction while being slightly curved so as to be folded back in the second direction from the base end portion of the convex portion 13a. Similarly, the second leg portion 13b2 is formed so as to extend in the fourth direction while being slightly curved so as to be folded back in the second direction from the base end portion of the convex portion 13a.

The first linear part 12 is curved in an arc shape between the first linear part 21 and the second linear part 21 and the second linear part 21 extending linearly in the first direction from the first shock absorbing part 11. And a first arcuate portion 22 formed on the. The first arc-shaped portion 22 is curved so as to shift in the fourth direction as the distance from the end of the first straight portion 21 on the first direction side increases, and the radius of curvature thereof is the bending of the first impact absorbing portion 11. It is set to be larger than the radius of curvature of any of the portions (the first convex portions 11a and 11b) and the bent portion (the convex portion 13a) of the second impact absorbing portion 13.

The second linear portion 14 is curved so as to be curved between the second linear portion 23 and the second shock absorbing portion 13, and the second linear portion 23 linearly extending in the first direction from the body-side fixing portion 3. Formed second arcuate portion 24. The second arc-shaped portion 24 is curved so as to shift in the third direction as the distance from the end of the second linear portion 23 on the first direction side increases, and the radius of curvature thereof is the bending of the first shock absorbing portion 11. It is set to be larger than the radius of curvature of any of the portions (the first convex portions 11a and 11b) and the bent portion (the convex portion 13a) of the second impact absorbing portion 13. In the present embodiment, the radius of curvature of the second arc-shaped portion 24 and the radius of curvature of the above-described first arc-shaped portion 22 are the same, and the value thereof is, for example, the first and second convex portions 11a of the first shock absorbing portion 11. , 11b (or the convex portion 13a of the second shock absorbing portion 13) is set to about 5 to 10 times the radius of curvature.

The first straight line portion 21 has gate portions 21a and 21b at both ends thereof. Similarly, the second linear portion 23 has gate portions 23a and 23b at both ends thereof. Each of the gate portions 21a, 21b, 23a, 23b of the first and second linear portions 21, 23 is formed at a position serving as a resin inflow port at the time of injection molding, and the gates in the first and second linear portions 21, 23 are formed. The cross-sectional area is larger than the other parts. The first arc-shaped portion 22 and the second arc-shaped portion 24 are formed so as to have the same cross-sectional area as the portions of the first and second linear portions 21 and 23 other than the gate portion. In other words, the first linear portion 12 (the first linear portion 21 and the first arc-shaped portion 22) has a locally enlarged cross-sectional area in the gate portions 21a and 21b (the cross-sectional areas of other portions are uniformly reduced. ), the second linear portion 14 (the second linear portion 23 and the second arc-shaped portion 24) has a locally enlarged cross-sectional area in the gate portions 23a and 23b (the cross-sectional areas of other portions are uniform. To be smaller). Each of the gate portions 21a, 21b, 23a, 23b corresponds to the "enlargement portion" in the present invention.

The first shock absorbing portion 11 and the second shock absorbing portion 13 are formed to have the same cross-sectional area as the above-mentioned gate portions 21a, 21b, 23a, 23b. In other words, the cross-sectional areas of the first shock absorbing portion 11 and the second shock absorbing portion 13 are made larger than the cross-sectional area of the first and second linear portions 12 and 14 other than the gate portion.

The gate portion 21a is formed at the joint between the first shock absorbing portion 11 and the first straight portion 21. In other words, the gate portion 21a is formed so as to be continuous with the end portion of the first impact absorbing portion 11 on the first direction side with the same cross-sectional area as the first impact absorbing portion 11. The gate portion 21b is formed at the boundary between the first straight portion 21 and the first arc-shaped portion 22. The gate portion 23b is formed at the boundary between the second linear portion 23 and the second arcuate portion 24. The gate portion 23a is formed in the vicinity of the end of the second linear portion 23 on the second direction side, more specifically, at a position slightly away from the body-side fixing portion 3 of the second linear portion 23 in the first direction. ..

As shown in FIGS. 1 and 2 (particularly FIG. 2), in the fall prevention member 1, the panel-side fixing portion 2 is fixed to the center of the back surface of the inspection panel 52, and the body-side fixing portion 3 is the base material 61 ( The inspection panel 52 and the base material 61 are connected to each other by being fixed to the inner surface of the base material 61) located on either the right or left side of the inspection port C. In the attached state of the fall prevention member 1, the body portion 4 is flexibly deformed according to the positional relationship between the panel side fixing portion 2 and the body side fixing portion 3. Specifically, when the main body portion 4 is deformed, at least the portions of the first and second linear portions 12, 14 having relatively small cross-sectional areas (that is, the portions excluding the gate portions 21a, 21b, 23a, 23b) are The shape changes from the shape in its natural state (FIGS. 3 to 6). On the other hand, the first impact absorbing portion 11 and the second impact absorbing portion 13, which have a large cross-sectional area and bend with a relatively small radius of curvature, are hardly deformed and substantially maintain their shapes in the natural state. In the example shown in FIG. 2, since the distance between the mounting position of the panel-side fixing portion 2 and the mounting position of the skeleton-side fixing portion 3 is relatively short, the main body portion 4 is not deformed so much, and as a whole. The shape is kept close to a natural state (that is, a shape close to a U shape).

FIG. 7 shows how the inspection panel 52 involuntarily comes off the frame member 51 and falls. When the inspection panel 52 falls, the inspection panel 52 is suspended by the fall prevention member 1 (see FIG. 8). However, at the moment when the inspection panel 52 is displaced to the suspended state, the inspection panel 52 is attached to the fall prevention member 1. A tensile force corresponding to its own weight acts. Then, due to the applied tensile force, as shown in FIG. 8, the first shock absorbing portion 11 and the second shock absorbing portion 13 that were not substantially deformed (that was kept in a bent state) before being dropped were bent. Deform in the direction to release (the direction to open the U-shaped bend). In other words, the first and second impact absorbing parts 11 and 13 are formed to have a strength such that the bending is released when a tensile force corresponding to the weight of the inspection panel 52 is applied. It should be noted that the first and second impact absorbing parts 11 and 13 after the bending is released (deformed) may have a radius of curvature of the bent part that is larger than that in the initial state (before the inspection panel 52 is dropped). It does not need to be deformed until it becomes close to.

Here, the deformation of each of the shock absorbing parts 11 and 13 is not plastic deformation but elastic deformation. For this reason, when the inspection panel 52 is attached to the frame member 51 again and the weight of the inspection panel 52 does not act, the shock absorbing portions 11 and 13 return to their original bent shapes (see FIGS. 1 to 4 ). And return. However, the elastic restoring force of each of the shock absorbing portions 11 and 13 is relatively weak, and as long as the pulling force corresponding to the self-weight of the inspection panel 52 acts on the fall prevention member 1 (that is, the operator checks the inspection panel 52). The shock absorbing parts 11 and 13 are maintained in the extended state (the state in which the bending is released) unless they are lifted.

In order to make the first and second shock absorbing parts 11 and 13 behave as described above when the inspection panel 52 is dropped, in the present embodiment, the cross-sectional area of each part including the shock absorbing parts 11 and 13 has an appropriate value. Is set to. For example, when the material of the fall prevention member 1 is polyamide resin (PA6), the cross-sectional areas of the first and second shock absorbing portions 11 and 13, and the gate portions 21a of the first and second linear portions 12 and 14, The cross-sectional areas of 21b, 23a and 23b are preferably set to 6 to 12 mm ² , respectively. On the other hand, it is preferable that the cross-sectional area of the portion other than the gate portion in the first and second linear portions 12 and 14 is set to 3 to 6 mm ² .

The cross-sectional area of the second shock absorbing portion 13 may be constant along the axial direction, but in the present embodiment, the tip end portion (second shock) of the convex portion 13a is different from the second shock absorbing portion 13. A treatment for locally increasing the cross-sectional area of the absorbing member 13 (the end on the second direction side) is performed (see FIGS. 3 and 4 ). This is because the portion having a small radius of curvature is reinforced to appropriately receive the impact when the inspection panel 52 is dropped.

As described above, in the present embodiment, since the inspection panel 52 is connected to the base material 61 via the fall prevention member 1, even if the inspection panel 52 is inadvertently detached from the frame member 51, the fall prevention member. 1, the inspection panel 52 is suspended, and the inspection panel 52 can be prevented from completely falling.

Further, the main body portion 4 of the fall prevention member 1 has a bent first shock absorbing portion 11 and a bent second shock absorbing portion 13 provided at a position separated from the first shock absorbing portion 11, Since the shock absorbing parts 11 and 13 can be deformed in the direction in which the bending is released according to the pulling force corresponding to the self-weight of the inspection panel 52, the inspection panel 52 involuntarily falls and the fall prevention member. Even in the state of being suspended by 1, the impact applied to the main body portion 4 due to the fall can be absorbed by the deformation of the impact absorbing portions 11 and 13. As a result, it is less likely that the panel-side fixing portion 2 or the skeleton-side fixing portion 3 will be separated from the mating member (the inspection panel 2 or the frame member 51), or the fall prevention member 1 will be cut midway. The reliability of the fall prevention member 1 can be enhanced, and the safety of the inspection port device 50 can be enhanced.

Further, the first and second shock absorbing parts 11 and 13 are provided at positions separated from each other, and the strength of each is such that they are deformed under the weight of the inspection panel 52 (not too high than necessary). Since the shock absorbing parts 11 and 13 are set, the restoring force exerted by the shock absorbing parts 11 and 13 when they are deformed is relatively weak. Therefore, it is possible to suppress the unstable behavior in which the inspection panel 52 that has once dropped and is in a suspended state is pulled up again by the restoring force of the shock absorbing portions 11 and 13. Further, since the impact absorbing portions 11 and 13 have a weak restoring force, the operator does not have to pull the inspection panel 52 with a particularly strong force to open the inspection port C when opening the inspection port C. It can be sufficiently separated from the (frame member 51). Thereby, the ease of handling the inspection panel 52 can be improved, and the efficiency of the inspection work through the inspection port C can be improved.

Further, in the above-described embodiment, the main body portion 4 in the natural state as a whole extends from the panel-side fixing portion 2 in the first direction and then extends back to the body-side fixing portion 3 while being folded back in the opposite second direction. Therefore, when the fall prevention member 1 is attached, as shown in FIG. 2, the main body 4 is maintained in a shape close to a natural state (that is, a shape close to a U shape), and the panel side fixing portion is formed. 2 can be attached to the back surface of the inspection panel 52, and the body-side fixing portion 3 can be attached to the periphery of the inspection port C (inner side surface of the base material 61). Thereby, the efficiency of the work of attaching the fall prevention member 1 can be improved.

Moreover, the first shock absorbing portion 11 is formed at the connecting portion between the main body portion 4 and the panel side fixing portion 2, and the second shock absorbing portion 13 is formed at the folding portion of the main body portion 4 from the first direction to the second direction. Since the check panel 52 is formed, it is possible to more effectively prevent the fall prevention member 1 from being cut by an impact when the inspection panel 52 is dropped. That is, in the main body portion 4, the joint portion with the panel side fixing portion 2 and the folded portion from the first direction to the second direction are considered to be the portions that are easily affected by the impact when the inspection panel 52 is dropped. According to the above-described embodiment in which the shock absorbing portions 11 and 13 are arranged at these portions, it is possible to effectively prevent the above-mentioned portions from being cut when the inspection panel 52 is dropped, and the fall prevention member 1 The reliability of can be improved.

Further, in the above-described embodiment, the first straight line portion 21 extending in a straight line between the first shock absorbing portion 11 and the second shock absorbing portion 13 and a relatively large radius of curvature (bending of the shock absorbing portions 11 and 13). The first linear portion 12 including the first arc-shaped portion 22 that is curved in an arc shape with a larger radius of curvature) is provided, and the first linear portion 12 is linearly formed between the second impact absorbing portion 13 and the body-side fixing portion 3. A second linear portion 14 is provided that includes a second linear portion 23 that extends and a second arc-shaped portion 24 that is curved in an arc shape with a relatively large radius of curvature (a radius of curvature that is larger than the bent portions of the shock absorbing portions 11 and 13). Therefore, while the body portion 4 is formed in a U shape as a whole as described above, the portion of the body portion 4 excluding the first and second impact absorbing portions 11 and 13 has a shock absorbing capacity (in other words, a shock absorbing capacity) more than necessary. It is possible to prevent the drop prevention member 1 from being easily handled, and it is possible to favorably handle the fall prevention member 1.

In addition, in the above-described embodiment, the pair of gate portions 21a and 21b having an enlarged cross-sectional area are formed at both axial end portions of the first linear portion 21, and the axial end portions of the second linear portion 23 are formed. Since a pair of gate portions 23a, 23b having an enlarged cross-sectional area is formed in the, the position corresponding to each gate portion 21a, 21b, 23a, 23b, for example, when molding the fall prevention member 1 by injection molding. By inflowing the resin from above, the resin flow can be smoothed and the formability of the fall prevention member 1 can be enhanced. The gate portions 21a, 21b, and 23b are provided between the first shock absorbing portion 11 and the first straight portion 21, between the first straight portion 21 and the first arc-shaped portion 22, and between the second straight portion 23 and the second straight portion 23. It is formed between the arc-shaped portion 24 and the arc-shaped portion 24, and is located at the inflection point which is the boundary between the linear portion and the curved portion. Therefore, when the inspection panel 52 falls, cutting is not caused at the inflection point. This can be effectively prevented, and the reliability of the fall prevention member 1 can be further enhanced.

Further, in the above-described embodiment, the two convex portions 11a and 11b that are bent to be convex on one side and the other side (third direction and fourth direction) orthogonal to the first direction or the second direction are provided. Since the second shock absorbing portion 13 is provided with the convex portion 13a which is provided in the first shock absorbing portion 11 and is bent so as to be convex in the second direction, each of the convex portions 11a and 11b is dropped when the inspection panel 52 is dropped. , 13a are deformed so as to open, so that the impact caused by the weight of the inspection panel 52 can be effectively absorbed.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the fall prevention member 1 including the panel-side fixing portion 2, the skeleton-side fixing portion 3, and the main body portion 4 is formed of an integral resin molded product, but the panel-side fixing portion 2 and the skeleton-side fixing portion are formed. It is also possible to separately form 3 and the main body part 4 and connect them to each other by a predetermined connecting means. Further, the panel-side fixing portion 2, the body-side fixing portion 3, and the body portion 4 may be made of different materials.

In the above embodiment, the cross-sectional areas of the first and second shock absorbing parts 11 and 13 and the gate portions 21a, 21b and 23b are set to be the same, but the cross-sectional areas of both may be different. ..

In the above-described embodiment, the skeleton-side fixing portion 3 is attached to the base material 61, but the target to which the skeleton-side fixing object 3 is attached may be any fixed object existing around the inspection port C, such as the frame member 51 or the wall material. The body-side fixing portion 3 may be attached to 60.

In the above-described embodiment, the example in which the fall prevention member of the present invention is applied to the inspection port device provided on the wall (side wall) that defines the side surface of the indoor space has been described, but the fall prevention member of the present invention may be a ceiling or a floor. It is also applicable to an inspection port device provided on a wall material other than the side wall.

DESCRIPTION OF SYMBOLS 1 Fall prevention member 2 Panel side fixing part 3 Body side fixing part 4 Body part 11 1st shock absorption part 11a, 11b convex part 12 1st linear part 13 2nd shock absorption part 13a convex part 14 2nd linear part 21 1st Straight part 21a, 21b Gate part (enlarged part)
22 1st arcuate part 23 2nd linear part 23a, 23b Gate part (enlargement part)
24 Second arcuate portion 50 Inspection port device 52 Inspection panel 61 Base material (fixed object)
C inspection port

Claims (6)

A fall prevention member for preventing the inspection panel from being detachably attached to a position where the inspection opening of the building is closed,
A panel side fixing part attached to the back surface of the inspection panel,
A skeleton-side fixing part that is attached to a predetermined fixed object around the inspection port,
A body portion that connects the body-side fixing portion and the panel-side fixing portion,
The main body part includes a first shock absorbing part, a second shock absorbing part, a first linear part provided between the first shock absorbing part and the second shock absorbing part, a second shock absorbing part and a body. It integrally has a second linear portion provided between the side fixing portion,
The first linear portion and the second linear portion have a shape closer to a straight line than the first impact absorbing portion and the second impact absorbing portion in a natural state,
The first shock absorbing portion and the second shock absorbing portion have a constant bent shape in a natural state, and are deformable in a direction to release the bent when a tensile force corresponding to the weight of the inspection panel is applied. A fall prevention member for an inspection panel, which is characterized in that The fall prevention member for an inspection panel according to claim 1,
In the natural state, the main body portion is formed so as to extend from the panel-side fixing portion in the first direction and then extend to the skeleton-side fixing portion while being folded back in the opposite second direction.
The first shock absorbing portion is formed at a connecting portion between the main body portion and the panel side fixing portion,
The second shock absorbing portion is formed at a folded portion of the body portion in the second direction from the first direction,
The first linear portion is formed to extend in the first direction from the first impact absorbing portion toward the second impact absorbing portion,
The inspection panel fall prevention member, wherein the second linear portion is formed so as to extend in the second direction from the second impact absorbing portion toward the skeleton-side fixing portion. The fall prevention member for an inspection panel according to claim 2,
The first linear portion is provided between the first linear portion that linearly extends from the first impact absorbing portion in the first direction, and between the first linear portion and the second impact absorbing portion. A shock absorbing portion and a first arc-shaped portion curved in an arc shape with a larger radius of curvature than the bent portion of the second shock absorbing portion,
The second linear portion is provided between the second linear portion that linearly extends in the first direction from the body-side fixing portion, and the second linear portion and the second impact absorbing portion, and the first impact is provided. A fall prevention member for an inspection panel, comprising: an absorbing portion and a second arc-shaped portion that is curved in an arc shape with a larger radius of curvature than the bent portion of the second shock absorbing portion. The fall prevention member for an inspection panel according to claim 3,
The panel-side fixing portion, the skeleton-side fixing portion, and the body portion are integrally formed of resin,
Fall prevention for inspection panel, characterized in that enlarged portions having enlarged cross-sectional areas are formed at both axial end portions of the first linear portion and axial end portions of the second linear portion. Element. The fall prevention member for an inspection panel according to claim 2,
When one side in the direction orthogonal to the first direction or the second direction is the third direction and the other side is the fourth direction, the first shock absorbing portion is bent to be convex in the third direction. A portion and a portion that is bent to be convex in the fourth direction are continuously formed,
The inspection panel fall prevention member, wherein the second shock absorbing portion has a portion that is bent so as to be convex in the second direction. An inspection panel that is detachably attached to the position where the inspection port of the building is closed,
An inspection port apparatus, comprising: the inspection panel fall prevention member according to any one of claims 1 to 5.