JP2019019551A - Grating detachment preventive device - Google Patents

Abstract

To provide a grating detachment preventive device applicable to a narrow grating, having excellent durability with a simple structure, and capable of preventing theft.SOLUTION: A grating detachment preventive device has a turnable hook member 8 entering under a hook engaging body 4A fixed to a grating receiving frame 3, in a grating 2. An engaging hole 13 engaging with a key-cum-attaching/detaching device is provided at a position hidden under the hook engaging body 4A of the hook member 8. The hook member 8 is devised not to be separated from the hook engaging body 4A without using the key-cum-attaching/detaching device, to thereby prevent detachment of the grating 2 for illegal purpose of theft.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a grating detachment prevention device for preventing detachment of a grating fitted in a U-shaped groove on the side of a road, around a building, a water collection port of a drainage channel installed in a park or the like.

  Conventionally, a grating is detachably installed in a drain cover such as a U-shaped groove used for a side groove of a road, an opening portion of a water collecting basin, or the like.

  In addition, a lightweight plastic pipe body such as a vinyl chloride pipe is used for the drainage channel, and a narrow water pipe is connected vertically to the upper surface of the light pipe body, and from the water pipe to the upper surface of the light pipe body. It is known that rainwater or the like flows into the drainage channel through the open water intake, and an elongated grating of a size suitable for this is detachably fitted in the opening of the water pipe. (For example, see Patent Document 1).

  On the other hand, in this type of grating, when the vehicle passes on the grating, it floats due to the impact and may come off the grating receiving frame. Is also known.

  As a means of preventing the coming off of the grating, a method of fixing the grating using a bolt to a frame-like creating receiving frame embedded in the opening of the groove lid or the catchment is generally used. A grating detachment preventing device having a structure in which the detachment is automatically fitted by being fitted to the outer surface has been developed.

  In this type of grating detachment prevention device, the detachment pawl is urged by the spring in the pushing direction in the grating, and the detachment pawl is formed in the grating receiving frame so as to enter the lower side. In addition, there is known a structure in which a latching claw is pushed in by a ratchet structure by fitting a grating, and protrudes downward at a position passing through the claw receiving portion (see, for example, Patent Document 2) ).

  Furthermore, in recent years, theft of metal products such as gratings has increased, and in this type of grating, in addition to the above-described anti-slip means, anti-theft measures are required. For example, fixing using special nuts Measures have been taken (see, for example, Patent Document 3).

JP 2009-243185 A Utility Model Registration No. 3192428 JP 2009-299376 A

  The narrow grating as shown in the above-mentioned Patent Document 1 is often installed mainly in parts other than the roadway, for example, around the site of buildings, other squares, and on sidewalks, and is not affected by the passage of vehicles. Therefore, the locking device was not used.

  However, in recent years, the weight of this type of grating has been reduced, and there is a possibility that the floating of the grating may occur even with a small impact.

  On the other hand, in the grating detachment prevention device shown in Patent Document 2, the structure is complicated, and in order to reduce the size so that it can be used for narrow-width gratings, it is constrained by conditions such as the strength of the material. It is difficult to downsize, and it is easily corroded because it is exposed to rainwater and, in some cases, non-freezing material, and there is a problem in durability.

  Furthermore, the conventional grating detachment prevention device can release the fixed state of the grating relative to the grating receiving frame relatively easily without using a special tool, and is insufficient as a theft countermeasure.

  Moreover, in the anti-theft structure using a special nut as shown in Patent Document 3, the nut is exposed on the ground surface side, so there is a possibility that it can be removed using a general-purpose tool or the like, which is not sufficient as a theft countermeasure. It was. On the other hand, when removing the grating in maintenance inspection or the like, the grating cannot be removed unless the nut is removed using a special jig, and thus the work is complicated.

  SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and has been made for the purpose of providing a grating anti-slip device that can be applied to narrow gratings and has a simple structure and excellent durability and can prevent theft. Is.

The feature of the invention described in claim 1 for solving the conventional problems as described above is that a grating having a plurality of main members arranged in parallel to each other and an opening opening on the ground surface, the grating is In a watering outlet provided with a fitting receiving frame to be fitted, wherein the grating is prevented from coming off from the grating receiving frame, the glitching coming-off preventing device is arranged below the fitted grating. A hook engaging body fixed to the grating receiving frame, and an upper end supported rotatably via a support shaft between the main members, and having a hook part that enters and engages under the hook engaging body. A hook member biased toward the hook engaging body, and a key and detachable tool for detaching the hook from the hook engaging body. An engagement hole arranged at an arbitrary position hidden under the hook engagement body when entering, and the key and attachment / detachment tool includes a rod-like insertion portion to be inserted between the main members, and a predetermined portion of the insertion portion. A height determining member fixed to the upper surface of the main member and a key portion projecting outward from the insertion portion, and the grating is disposed outside the flange member. Horizontal positioning in which the insertion portion is inserted between the main member and the main member adjacent to the main member in a horizontally slidable state, and the insertion portion sliding between the main members is stopped against With members,
The key portion is formed by rotating the insertion portion in a state where the height determining member is abutted against the upper surface of the main member and the insertion portion is abutted against a horizontal positioning member. In contact with the inner edge, the flange member is rotated in the lifting direction and inserted into the engagement hole under the main member.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the invention further includes a lifting support that is fixed between the main members and that comes into contact with the hook member lifted from below the hook engaging body. The key support / removal tool is supported by the lifting support and the flange member.

  A feature of the invention described in claim 3 is that, in addition to the configuration of claim 1 or 2, the support shaft forms the horizontal positioning member.

  According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, the key / detachable tool has a hook / handle at the upper end.

  According to a fifth aspect of the present invention, in addition to the structure according to any one of the first to fourth aspects, a locking spacer is provided that is fitted between the upper surface of the grating and the height determining member.

  According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect, the locking spacer includes a spring portion that can expand and contract in the insertion portion axial direction.

  The grating detachment preventing device according to the present invention has the configuration according to claim 1 so that the hook portion is automatically engaged with the hook engaging member by the rotational moment due to the weight of the hook member simply by fitting the grating into the grating receiving frame. Since it enters underneath and is kept from slipping off, the jumping of the grating due to the passage of the vehicle is prevented. In addition, this grating detachment preventing device cannot grasp the position of the engagement hole because the heel portion and the engagement hole are in an arbitrary position under the heel engagement body and hidden in the detachment prevention state. Without using the key attachment / detachment tool, the eaves member cannot be detached from the eaves engagement body, and cannot be removed illegally for the purpose of theft or the like.

  Moreover, in this invention, when comprising the structure of Claim 2, when raising a grating, it can support stably.

  Moreover, in this invention, by comprising the structure of Claim 3, a number of parts can be restrained and cost reduction can be aimed at.

  Furthermore, in this invention, when comprising the structure of Claim 4, when lifting a grating, it can lift with a crane etc.

  Furthermore, in the present invention, by providing the structure according to any one of claims 5 to 6, the state where the collar member is lifted and the state where the grating is fixed to the key attaching / detaching tool can be maintained, and it is safe and efficient. In addition, the attaching / detaching operation of the grating can be performed.

1 is a plan view showing a first embodiment of a drainage grating anti-separation device according to the present invention. It is a longitudinal cross-sectional view same as the above. It is an enlarged plan view of a grating detachment preventing device portion. It is the longitudinal cross-sectional view. It is a schematic sectional drawing which shows the procedure of cancellation | release operation of the grating separation prevention apparatus same as the above, Comprising: (A-1) is insertion operation of a key and attachment / detachment tool, (B-1) is slide movement operation of the key and attachment / detachment tool. FIG. FIG. 6 is a plan view corresponding to FIG. 5. It is a schematic sectional drawing which shows the procedure of cancellation | release operation of a grating detachment | determination apparatus same as the above, (C-1) is rotation operation of a key combined use attachment / detachment tool, (D-1) is the same. It is a figure which shows an engagement state. FIG. 8 is a plan view corresponding to FIG. 7. It is a schematic sectional drawing which shows the procedure of cancellation | release operation of a grating separation prevention apparatus same as the above, (E) is the state in which the grating was supported by the key attachment / detachment tool, and (F) shows the state in which the locking spacer is mounted. FIG. It is a longitudinal cross-sectional view which shows the state at the time of lifting of a grating same as the above. It is a top view which shows 2nd Example of the grating detachment prevention apparatus which concerns on this invention. It is a longitudinal cross-sectional view same as the above. It is a longitudinal cross-sectional view which shows the state at the time of the grating lifting same as the above.

  Next, a first embodiment of the grating detachment preventing device according to the present invention will be described with reference to FIGS.

  In addition, a present Example demonstrates the thin grating about 30-50 mm in total width used for the narrow water collection port 1 installed in the drainage channel, in the figure, the code | symbol 1 is a water collection port, code | symbol 2 is A grating fitted into the water collecting port 1.

  The water collecting port 1 includes a frame-shaped grating receiving frame 3 fixed to the opening on the ground surface side, and a grating 2 fitted into the grating receiving frame 3, and the grating 2 is held on the grating receiving frame 3 by a stopper device. Yes.

  The grating receiving frame 3 is formed in a narrow rectangular frame shape whose upper surface is opened by stainless steel or the like, and a plurality of grating support bars 4, 4... Installed between the side plates 3a, 3a facing each other in the width direction are predetermined. Provided at intervals.

  The grating support bars 4, 4... Are formed in a plate shape having a certain width and fixed at both ends to the side plate, and the lower surface of the grating 2 is supported on the upper surface thereof, so that the downward load on the grating 2 is dispersed. Thus, the thickness (beam back) of the grating 2 can be reduced and the weight can be reduced.

  The grating 2 has a plurality of elongated plate-like main members 5, 5... Arranged in parallel with a predetermined interval with the width direction thereof being directed upward and downward, and in an orientation orthogonal to the main members 5, 5. .. Are provided, and the main members 5, 5... Are connected by the cross bars 6, 6.

  The grating detachment prevention device includes a hook engaging body 4A fixed to the grating receiving frame 3, and a hook member 8 whose upper end is rotatably supported between the main members 5, 5. By fitting the grating 2 into the grating receiving frame 3, the hook member 8 is automatically engaged with the hook engaging body 4A by the rotational moment due to its own weight, and the grating 2 is prevented from coming off from the grating receiving frame 3. ing.

  The grating detachment preventing device includes a key / detachable tool 9 for lifting the grating 2, and the key / detachable tool 9 rotates the hook member 8 in the lifting direction so as to be detached from the hook engaging body 4A. The grating 2 can be detached from the grating receiving frame 3 by supporting the grating 2 on the combined use attachment / detachment tool 9.

  The hook engaging body 4A is constructed between the side plates 3a, 3a facing each other in the width direction of the grating receiving frame 3, and is arranged under the fitted grating 2. In this embodiment, the saddle engaging body 4A is also used as the grating support bars 4, 4... Of the grating receiving frame 3.

  The eaves member 8 is integrally formed by processing a steel plate that is slightly thinner than the gap between the main members 5 and 5, and is formed between the main members 5 and 5 disposed in the center of the grating 2 via the support shaft 7. A bearing portion 10 to be supported, a flange portion 11 which is underneath and engages under the flange engagement body 4A, and a connection support portion 12 which connects the bearing portion 10 and the flange portion 11 are provided.

  The support shaft 7 is formed in a round bar shape, penetrates the main members 5, 5... Perpendicularly to the main members 5, 5... And also serves as a horizontal positioning member 7 </ b> A described later. It has become.

  The bearing portion 10 is formed in a circular shape, and a through hole 10a passes through the center thereof, and both ends of the support shaft 7 passing through the through hole 10a are supported by both main members 5, 5. 8 is rotatably supported between the main members 5, 5.

  The connection support portion 12 is arranged so as to be shifted to one side in the rotation direction of the bearing portion 10, and the flange portion 11 is integrally supported on the rotation direction flange engagement body 4 </ b> A side. A notch 8a is formed at the front edge, the notch 8a is fitted with the hook engaging body 4A, and the hook 11 is fitted under the hook engaging body 4A.

  The flange portion 11 is formed in a flat plate shape having a constant weight, and includes an engagement surface 11a that engages with the lower surface of the flange engagement body 4A at the upper edge thereof.

  The flange 11 also functions as a weight for urging the flange member 8 toward the flange engaging body 4A, and the shape thereof is not particularly limited, but a rectangular shape, a trapezoidal shape, a fan shape, or the like is appropriately selected. Thus, the position of the center of gravity is adjusted, and the collar portion 11 is always urged toward the collar engaging body 4A side by the rotational moment around the support shaft 7 due to its own weight.

  Although not particularly illustrated, the engaging surface 11a is provided with a plurality of ridges having a mountain-shaped cross section in a direction orthogonal to the rotation direction of the flange member 8, that is, in a direction parallel to the thickness direction of the flange member 8. It may be formed in a continuous arrangement, and this ridge may be engaged with the edge of the hook engaging body 4A when it is prevented from coming off.

  Further, as shown in FIG. 3, the collar portion 11 includes an engagement hole 13 having an arbitrary size arranged at an arbitrary position hidden under the collar engagement body 4 </ b> A when entering the area below the collar engagement body 4 </ b> A. The hook member 8 can be rotated by engaging the key / detachable tool 9 with the engagement hole 13 in accordance with a predetermined operation.

  The key detaching tool 9 includes a rod-shaped insertion portion 20, a height determining member 21 fixed to a predetermined position of the insertion portion 20, and affixed to the upper surface of the grating 2, and a height determination on the lower end side of the insertion portion 20. And a key portion 22 projecting outward at a position away from the member 21 by a predetermined distance.

  A hook / handle 23 is provided at the upper end of the key / attachment 9 and the grating 2 can be attached / detached by holding the hook / handle 23. Note that the handle may not have a hook function.

  On the other hand, in the grating 2, the insertion portion 20 is inserted in a gap 24 between the main member 5 located outside the flange member 8 and the adjacent main member 5 in a state in which the insertion portion 20 can slide in the horizontal direction. A horizontal positioning member 7A is provided to which the insertion portion 20 that slides in the gap 24 between the members is held, and the key attachment / detachment tool 9 is engaged with the engagement hole 13 through the gap 24 between the main members 5 and 5. It can be made to. In this embodiment, a part of the support shaft 7 forms a horizontal positioning member 7A.

  The insertion portion 20 is formed in a round bar shape slightly thinner than the gap between the main members 5 and 5 by a member having rigidity such as a steel rod, a height determining member 21 is fixed to the upper end, and the key portion 22 is formed on the lower end. Projected as a single unit.

  The height determining member 21 is formed in a rod shape, nut shape or flange shape whose outer diameter is larger than the diameter of the insertion portion 20, and the lower end surface is abutted against the upper surfaces of the main members 5, 5 of the grating 2, and the insertion portion 20. Can be positioned at a predetermined height below the grating 2.

  In other words, the insertion portion 20 below the height determining member 21 extends from the upper surface of the grating 2 to the engagement hole 13 in a state where the flange portion 11 is engaged with the flange engagement body 4A (hereinafter referred to as a state in which the grating 2 is prevented from coming off). The key portion 22 is the same as the engagement hole 13 when the height determining member 21 is formed on the upper surface of the grating 2 (upper surface of the main members 5, 5...). I try to be high.

  The key portion 22 is formed in a shape in which the distal end of the insertion portion 20 is bent in the vertical direction, and has an L shape together with the insertion portion 20.

  The key portion 22 is formed to match the position and size of the engagement hole 13, the height determining member 21 is abutted against the upper surface of the grating 2, and the insertion portion 20 is abutted against the horizontal positioning member 7A. When the insertion portion 20 is rotated in the state (hereinafter referred to as an operable state), the inner portion 13b of the engagement hole 13 is abutted without interfering with the surface of the flange portion 11.

  That is, the key portion 22 has an outer diameter that can be inserted into the engagement hole 13, and is engaged with the engagement hole 13 in the disengagement state of the grating 2 on the side far from the center of the insertion portion 20 in the operable state. It is shorter than the distance to the opening edge 13a of the hole 13, and is formed longer than the opening edge part 13b of the engagement hole 13 on the near side.

  Accordingly, the key portion 22 abuts on the opening edge portion 13b near the center of the insertion portion 20 of the engagement hole 13 below the main member 5 by rotating the insertion portion 20 in an operable state, and the flange member 8 Is rotated in the lifting direction, and is inserted into the engagement hole 13 accordingly.

  When the key portion 22 is inserted into the engagement hole 13, the central axis of the key portion 22 moves to the grating 2 side with respect to the support shaft 7. From this state, the key combination attaching / detaching tool 9 is lifted upward. The collar member 8 can be rotated to disengage the collar part 11 from the collar engaging body 4A.

  Further, when the key combination attaching / detaching tool 9 is pulled up, the collar member 8 rotates and the key portion 22 contacts the lower surface of the main member 5, and the entire grating 2 is supported by the key combining attachment / detachment tool 9.

  Further, the collar member 8 comes into contact with the lifting support 6A as it rotates, and the grating 2 is supported by the key attaching / detaching tool 9 via the lifting support 6A and the collar member 8. In this embodiment, the cross bar 6 constitutes a lifting support 6A.

  Therefore, the grating 2 is supported by the key and attachment / detachment tool 9 by at least the state in which the key portion 22 is in contact with the lower surface of the main member 5 or the state in which the flange member 8 is in contact with the lifting support 6A. In this state, the grating 2 can be lifted from the grating receiving frame 3 with the key and attachment / detachment tool 9.

  Further, the grating detachment preventing device is fitted between the upper surface of the grating 2 and the height determining member 21 at a position where the key portion 22 contacts the lower surface of the main member 5 or a position where the collar member 8 contacts the lifting support 6A. 9 (F) and FIG. 10, by fitting the locking spacer 25 between the upper surface of the grating 2 and the height determining member 21, the grating 2 can be attached and detached as a key. The state supported by the tool 9 is maintained.

  The locking spacer 25 includes a spring portion that can be expanded and contracted in the axial direction of the insertion portion 20, and biases the key attachment / detachment tool 9 upward.

  The mode of the locking spacer 25 is not particularly limited. For example, as in the present embodiment, a C-shaped leaf spring is formed of a flexible plate material, and the cut portion 26 opened to the curved portion side is formed. Make the shape you have.

  When the grating 2 is fitted in the grating receiving frame 3, as shown in FIG. 3, in the grating detachment preventing device configured as described above, the collar portion 11 is fitted under the collar engagement body 4 </ b> A by the rotational moment due to its own weight. The grating 2 is prevented from being detached from the grating receiving frame 3.

  At that time, since the flange portion 11 and the engagement hole 13 are in an arbitrary position below the flange engagement body 4A (the grating support bars 4, 4...) And are hidden, the position of the engagement hole 13 can be grasped. Therefore, the eaves member 8 cannot be operated.

  In other words, this grating detachment preventing device can detach the scissors member 8 from the scissors engaging body 4A only when using a predetermined key and attachment / detachment tool 9 and removes it illegally for the purpose of theft or the like. I can't do that.

  In order to remove the grating 2, first, as shown in FIGS. 5A-1 and 6A-2, the insertion portion 20 is moved upward with the key portion 22 facing parallel to the surface of the flange member 8. Are inserted into the gap 24 between the main members 5 and 5, and the height determining member 21 is stopped against the upper surface of the grating 2 (main members 5, 5...).

  Next, from that state, as shown in FIG. 5 (B-1) and FIG. 6 (B-2), until the insertion member 20 is guided by the main members 5 and 5 and is held against the horizontal positioning member 7A. By sliding, the height determining member 21 is brought into contact with the upper surface of the grating 2 and the insertion portion 20 is brought into contact with the horizontal positioning member 7A, that is, in an operable state.

  Then, as shown in FIGS. 7C-1 and 8C-2, when the hook / handle 23 is turned in an operable state and the insertion portion 20 is rotated about its axis, the main member is associated therewith. 5, the key portion 22 rotates and comes into contact with the opening edge portion of the engagement hole 13 of the flange member 8.

  Further, as shown in FIG. 7 (D-1) and FIG. 8 (D-2), when the hook / handle 23 is turned and the insertion portion 20 is further rotated, it is pushed by the key portion 22 and the hook member 8 is rotated. The key portion 22 is inserted into the engagement hole 13 below the main member 5 while moving.

  Moreover, since the position of the key part 22 which supports the collar member 8 moves outside the support shaft 7 with the rotation of the collar member 8, the collar member 8 is removed by pulling the key attachment / detachment tool 9 upward. It can be rotated.

  The operation of inserting the key portion 22 into the engagement hole 13 is in a state where the flange portion 11 and the engagement hole 13 are hidden at an arbitrary position below the flange engagement body 4A (grating support bars 4, 4...) Although it is in a state where the position of the engagement hole 13 cannot be grasped, the position and length of the key portion 22 is appropriately set with respect to the engagement hole 13 in the operable state of the predetermined key and attachment tool 9. It is possible to operate without visually checking the positional relationship between the engagement hole 13 and the key portion 22.

  Then, as shown in FIG. 9 (E), by pulling up the key attaching / detaching tool 9 upward, the hook member 8 is rotated, the hook member 8 is lifted and comes into contact with the support 6A, and the key portion 22 is mainly used. The grating 2 comes into contact with the lower surface of the member 5 and is supported by the key and attachment / detachment tool 9.

  Next, as shown in FIG. 9 (F), a locking spacer 25 is fitted between the upper surface of the grating 2 and the height determining member 21, and the key attaching / detaching tool 9 is lifted by the hook member 8 so as to contact the support 6A. The touched position is fixed at a position where the key portion 22 is in contact with the lower surface of the main member 5.

  In this state, holding the hook handle 23 and lifting the key attaching / detaching tool 9 as shown in FIG. 10 raises the grating 2 from the grating receiving frame 3.

  Since the grating 2 is narrow and light, it can be conveyed by human power while holding the hook / handle 23. Further, by connecting a lifting wire to the hook / handle 23, it can be transported using a crane vehicle or the like.

  On the other hand, in this grating detachment prevention device, when the grating 2 is installed in the grating receiving frame 3, the use of the key attaching / detaching tool 9 makes it easy to fit by grasping the handle located at the position protruding from the upper surface of the grating 2. It can be carried out.

  Then, after fitting the grating 2 into the grating receiving frame 3, the series of operations shown in FIGS. 5 to 10 are performed in the reverse procedure, whereby the grating 2 is prevented from coming off as shown in FIGS. 3 and 4.

  That is, after fitting the grating 2 into the grating receiving frame 3, the locking spacer 25 is removed, and the hook / handle detachment tool 9 is lowered while holding the hook / handle handle 23, and the hook / handle handle 23 is turned to insert it. By rotating 20 and detaching the key portion 22 from the engagement hole 13, the flange member 8 is automatically moved to the flange engagement body 4A side by the rotational moment due to its own weight, and the flange portion 11 is engaged with the flange engagement body 4A. The grating 2 is prevented from coming off.

  In addition, the aspect of the grating detachment preventing device according to the present invention is not limited to the above-described embodiment. For example, as shown in FIGS. Compared to the wide grating 2A, the present invention can also be applied. In addition, the same code | symbol is attached | subjected to the same part as 1st Example, and duplication description is abbreviate | omitted.

  In this example, the eaves member 8 is rotatably supported at the four corners of the square-shaped grating 2A.

  The hook member 8 is the same as that of the first embodiment, but the hook engaging body 4A to which the hook member 8 is engaged is used as a frame-like frame portion of the grating receiving frame 3, and the hook portion 11 of the hook member 8 is The upper surface of the flange portion 11 is engaged with the lower side of the inner peripheral edge of the frame portion by entering under the inner peripheral edge portion of the frame portion of the grating receiving frame 3.

  In addition, when the concrete portion for embedding the grating receiving frame 3 is placed, the hook engaging body 4A is provided by placing a shape member (not shown) under the frame portion and removing the shape member after the concrete is solidified. It can be formed by providing a space in which the flange portion 11 can enter under the frame portion.

  In this grating 2A, if a key combination attaching / detaching tool 9 is attached to each saddle member 8, a hanging wire 30 is connected to a hook combining handle 23 of the key combining attachment 9 as shown in FIG. Thus, it is possible to easily carry and fit.

DESCRIPTION OF SYMBOLS 1 Water collecting port 2 Grating 3 Grating receiving frame 4 Grating support bar 4A 鉤 Engagement body 5 Main member 6 Crossbar 7 Support shaft 8 鉤 member 9 Key attachment / detachment tool 10 Bearing portion 11 鉤 portion 12 Connection support portion 13 Engagement hole 20 Insertion portion 21 Height determining member 22 Key portion 23 Hook combined handle 24 Key insertion portion 25 Lock spacer 26 Notch portion

Claims (6)

A water collecting port comprising a grating having a plurality of main members arranged in parallel to each other and a grating receiving frame that is disposed in an opening that is open to the ground surface and into which the grating is fitted, wherein the grating is in relation to the grating receiving frame. In the grating detachment prevention device designed to prevent detachment,
A hook engaging body fixed to the grating receiving frame so as to be disposed under the fitted grating.
An upper end portion is rotatably supported between the main members via a support shaft, and has a flange portion that enters and engages under the flange engagement body, and is biased toward the flange engagement body side by its own weight. Members,
A key and detachable tool for detaching the collar from the collar engaging body,
The collar portion includes an engagement hole arranged at an arbitrary position hidden under the collar engagement body when entering the area under the collar engagement body,
The key and attachment / detachment tool includes a rod-shaped insertion portion inserted between the main members, a height determining member fixed to a predetermined position of the insertion portion and held against the upper surface of the main member, and the insertion With a key part protruding outward from the part,
The grating is inserted between the main member disposed outside the flange member and the main member adjacent to the main member in a state in which the insertion portion is slidable in the horizontal direction, and between the main members. A horizontal positioning member to which the insertion portion that slides is held against,
The key portion is formed by rotating the insertion portion in a state where the height determining member is abutted against the upper surface of the main member and the insertion portion is abutted against a horizontal positioning member. A grating anti-separation device that contacts an inner edge, rotates the flange member in the lifting direction, and is inserted into the engagement hole under the main member.   A lifting support that is fixed between the main members and that comes into contact with the hook member that is lifted from below the hook engaging body is provided, and the grating is supported by the key and attachment / detachment tool through the lifting support and the hook member. 2. The grating detachment preventing device according to claim 1, wherein   The grating detachment preventing device according to claim 1, wherein the support shaft forms the horizontal positioning member.   The grating detachment preventing device according to any one of claims 1 to 3, wherein the key / detachable tool includes a hook / handle at an upper end portion.   The grating detachment preventing device according to any one of claims 1 to 4, further comprising a locking spacer that is fitted between the upper surface of the grating and the height determining member.   The draining-grating detachment preventing device according to claim 5, wherein the locking spacer includes a spring portion that can expand and contract in an insertion portion axial direction.

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