JP3203027U - Cover for side groove treadle - Google Patents

Abstract

Provided is a cover for a side groove tread plate which can generate a high frictional force between the inner surface of the handle hole and exhibit a high retaining effect. A top plate 10 that covers a handle hole C formed between adjacent treads B and B, and a reverse T-shaped cross section that is detachably coupled to the bottom surface of the top plate 10 and hangs down. Leg 20. The leg portion 20 has a hanging portion 21 whose upper end surface is coupled to the lower surface of the top plate 10, and a flange portion 22 extending laterally from the lower end portion of the hanging portion 21, and is inserted into the handle hole C. Both ends of the flange portion 22 are bent upward to form a pair of rising portions 23, and each rising portion 23 comes into surface contact with the inner surface of the handle hole C by an elastic restoring force to generate a large frictional force. [Selection] Figure 5

Description

  The present invention relates to a cover for a hand hole of a side groove tread plate.

  As shown in FIG. 8, the upper end opening of the side groove A made of, for example, concrete and having a U-shaped cross section provided along the road is closed by a plurality of concrete treads B arranged adjacent to each other. It is designed to prevent overturning and intrusion of various foreign substances. Between the adjacent stepping plates B, when the stepping plate B is attached to the side groove A or when the stepping plate B is removed during maintenance inspection of the side groove A, etc. In order to engage the finger of the operator and the nail of the lift hanger, a handle hole C is provided which functions as a drainage hole for guiding rain water on the road surface into the side groove A when it rains.

  By the way, there is a side groove A whose upper end opening is closed by the adjacent step board B at the boundary between the supermarket or convenience store site where the people come and go and the road and the road, and the handle hole C is left open. In such a case, there are problems that a toe of a pedestrian or an infant's foot is caught, a heel of a high heel is fitted, or a small front wheel of a wheelchair for an obstacle vehicle is fitted.

  On the other hand, if there is a gutter A whose upper end opening is blocked by the adjacent footboard B at the boundary between the site where the construction work is performed and the road, and the handle hole C is left open, Concrete, mortar debris or earth and sand flows out from this, and these flow into the side groove A from the handle hole C, causing a problem of closing the side groove A.

  As a solution to these problems, a “cap for groove cover drain hole” described in Patent Document 1 is provided.

  As shown in FIGS. 9 and 10, the “cap for drain cover drain hole” described in Patent Document 1 faces the top plate 1 </ b> A covering the handle hole C and substantially symmetrically from the center lower surface of the top plate 1 </ b> A. Between a pair of left and right steel plate leg members 2A, 2A that are integrally suspended downward in the state, a bolt 4A disposed vertically between the leg members 2A, 2A, and the leg members 2A, 2A A nut member 3A screwed to the bolt 4A, and a serrated engaging claw 2a that engages a side surface (inner surface) of a drain hole (handle hole) C is formed at the lower end of the leg members 2A, 2A. Has been.

  According to the “groove lid drain hole cap” having such a configuration, the leg members 2A and 2A are inserted into the handle holes C, the handle holes C are covered with the top plate 1A, and the bolt 4A is rotated in the forward direction to turn the nut. When the member 3A is raised, the leg members 2A, 2A expand outward, the engaging claw 2a engages with the inner surface of the handle hole C, and the "groove cover drain hole cap" is attached to the handle hole C. . As a result, the above problem can be avoided. Further, by rotating the bolt 4A in the reverse direction, the nut member 3A is lowered to loosen the expansion of the leg members 2A, 2A, and the engagement claw 2a is disengaged from the inner surface of the handle C. The drainage hole cap "can be removed from the handle hole C, and the tread plate B is removed from the side groove A using the opened handle hole C, so that the maintenance check of the side groove A can be performed.

  Although this type of “groove lid drain hole cap” can solve the above-mentioned problems, it has a large number of parts and has a complicated structure, and it is troublesome to attach to and remove from the handle hole C. It takes. That is, when mounting to the handle hole C, first, the bolt 4A is rotated in the reverse direction to loosen the expansion of the leg members 2A and 2A so that it can be inserted into the handle hole C, and the handle hole. After inserting the leg members 2A, 2A into C, the bolt 4A is rotated in the forward direction to expand the leg members 2A, 2A outwardly, and the second engaging member 2a is engaged with the inner surface of the handle hole C. An operation is required, and when removing from the handle hole C, the same pre-stage operation as the first operation is required.

  In addition, since the leg members 2A and 2A are formed with the engaging claws 2a as the action point at a position spaced downward from the force point where the nut member 3A is inscribed, the outward expansion applied to the force point is performed. The force is halved at the engaging claw 2a. In addition, since the engagement between the serrated engaging claw 2a and the inner surface of the handle hole C has a plurality of point contact forms, the frictional force between the engaging claw 2a and the inner surface of the handle hole C is limited to a small extent. Therefore, a high retaining effect cannot be exhibited. For this reason, there is a risk that it will be lifted off the tread board B due to external factors such as vibration and will eventually be removed from the handle hole C.

  On the other hand, it is described in Patent Document 2 that solves the above-mentioned problems, reduces the number of parts, simplifies the structure, and facilitates attachment to and removal from the handle hole C. A “groove cover” is provided.

  As shown in FIGS. 11, 12, and 13, the “side groove cover” described in Patent Document 2 is a pair of left and right flexible plugs inserted into the handle hole C on the back surface of the top plate 1 </ b> A covering the handle hole C. As shown by the solid line in FIG. 13, the inflow prevention plates 2A and 2A are attached to face each other at an arrangement interval larger than the width of the handle hole C. The flexible inflow prevention plates 2A and 2A A pair of stainless steel plates are formed in a vertically long oval shape, and the arrangement interval at the position where the bulge is the largest is configured to be larger than the inner method (dimension in the left-right direction) of the handle hole C, and the lower ends thereof are They are joined together.

  According to the “side groove cover” having such a configuration, the flexible inflow preventing plate 2A, 2A, 2A, 2A, 2A, 2A, 2A is inserted into the handle hole C, the handle hole C is covered with the top plate 1A, and the flexible inflow preventing plates 2A and 2A inserted into the handle hole C are elastic as shown by a two-dot chain line in FIG. The portion where the bulge of the flexible inflow preventing plates 2A, 2A is deformed and the largest bulge is pressed against the inner surface of the handle hole C, and the “side groove cover” is attached to the handle hole C.

  This “side groove cover” can solve the above-mentioned problems, and has a reduced number of parts and a simple structure as compared with the “groove lid drain hole cap” described in Patent Document 1. It becomes. Further, the flexible inflow prevention plates 2A and 2A can be attached to the handle hole C simply by facing the lower end of the handle hole C and depressing the top plate 1A, and the attached “side groove cover” pulls the top plate 1A up. Since it can be simply removed from the handle hole C, the attachment to the handle hole C and the removal from the handle hole C are facilitated.

  However, when the flexible inflow prevention plates 2A and 2A are elastically restored by the elastic restoring force, the portions where the bulges of the flexible inflow prevention plates 2A and 2A are the largest are pressed against the inner surface of the handle hole C in a line contact state. The frictional force between the largest portion and the inner surface of the handle hole C is limited to be small, and a high retaining effect cannot be exhibited. For this reason, there is a risk that it will be lifted from the tread board B due to external factors such as vibration, and eventually pulled out from the handle hole C.

Utility Model Registration No. 3104429 Japanese Patent Laid-Open No. 10-37292

  The present invention has been made in view of the above circumstances, and it is possible to generate a high frictional force between the inner surface of the handle hole and to provide a high retaining effect. The purpose of this is to provide a cover.

  To achieve the above object, a cover for a side groove tread plate according to the present invention includes a top plate covering a handle hole formed between adjacent tread plates that close the upper end opening of the side groove, and a bottom surface of the top plate. And a leg portion made of rubber that hangs down and is configured to be inserted into the handle hole and pressed against the inner surface of the handle hole by an elastic restoring force. .

  Since the cover for the side groove tread plate having the above-described structure is composed of two members, the top plate and the rubber legs, the number of parts can be reduced and the structure can be simplified. Further, the leg can be mounted in a state where the leg is inserted into the handle hole and the handle hole is covered with the top plate by simply pressing the top plate with the lower end of the leg facing the handle hole. When the top plate is pulled up in this state, it can be removed, so that it can be easily attached to and removed from the handle hole. In addition, when the rubber leg portion having a large friction coefficient is pressed against the inner surface of the handle hole, a large frictional force is generated between the leg portion and the inner surface of the handle hole, thereby exhibiting a high retaining effect. Can do. As a result, it is possible to reliably prevent lifting due to external factors such as vibrations, and eventually removal from the handle hole, thereby improving reliability.

  The top plate is a flat plate formed of a resin having high impact resistance and wear resistance. According to this, the height which protrudes on the surface of a footboard is restrained small, and it can avoid a pedestrian's whisper etc. and can improve safety | security. Moreover, although it is influenced by passage of a pedestrian or a vehicle by being always exposed, damage caused by this influence can be suppressed.

  The leg portion extends vertically and in the front-rear direction and has a thick plate-like hanging portion whose upper end surface is coupled to the lower surface of the top plate, and extends from the lower end portion of the hanging portion in both the left and right directions, and to the handle hole. And a flange portion that is bent upward by insertion and is in pressure contact with the inner surface in the left-right direction of the handle hole by an elastic restoring force. According to this, it can produce easily by the method of cut | disconnecting the extrusion-molded elongate object by predetermined length, or the method of individual mold forming. In addition, since the flange portion with a large friction coefficient is in surface pressure contact with the inner surface in the left and right direction of the handle hole by the elastic restoring force, a large friction force is generated between the flange portion and the inner surface of the handle hole, resulting in a high retaining effect. It can be demonstrated.

  The left and right dimension of the flange portion is set to be larger than the inner method in the left and right direction of the handle hole, and it is possible to form a pair of left and right rising parts bent upward by insertion into the handle hole, and The upper end of each rising portion and the lower surface of the top plate are set to values that can be separated from each other, and each rising portion is configured to be in surface pressure contact with the inner surface in the left-right direction of the handle hole by an elastic restoring force. Yes. According to this, since the pair of left and right rising parts having a large friction coefficient are in surface pressure contact with the inner surface in the left and right direction of the handle hole by elastic restoring force, a large frictional force is generated between each rising part and the inner surface of the handle hole. , Can exhibit a high retaining effect. In addition, the upper end of each rising part and the lower surface of the top plate are separated from each other, so that the collision between each rising part and the lower surface of the top plate is avoided, and the lower surface of the top plate is attached in close contact with the upper surface of the tread plate. it can.

  The top plate is provided with a plurality of screw member insertion holes, and the leg portions are detachably coupled to the lower surface of the top plate by screw nails that are screwed into the leg portions through the screw member insertion holes. According to this, simply by screwing a screw nail into the leg from the top plate side, the top plate and the leg can be easily and firmly coupled by the fastening force. For this reason, it is not necessary to provide a screw hole in the leg portion in advance, and the workability of coupling the top plate and the leg portion is improved. Moreover, even if the top plate is damaged over time, it is economically advantageous because only the top plate can be replaced and the legs can be reused. That is, the screw hole of the leg portion tapped at the time of coupling with the top plate substantially disappears due to the elastic contraction when the leg portion is separated from the top plate. As a result, the replaced top plate and the reused leg portion can be coupled by the screw nails.

  The cover for the handle hole of the side groove tread plate according to the present invention is large between the leg portion and the inner surface of the handle hole by the rubber leg portion having a large friction coefficient being pressed against the inner surface of the handle hole by its elastic restoring force. A frictional force is generated, and a high retaining effect can be exhibited. As a result, it is possible to reliably prevent lifting due to external factors such as vibration, and extension from the handle hole.

It is a perspective view which decomposes | disassembles and shows one Embodiment of this invention. It is a top view which shows one Embodiment of this invention. FIG. 3 is a front view of FIG. 2. FIG. 3 is a left side view of FIG. 2. It is a top view which shows the mounting state of this invention. 6A is a cross-sectional view taken along the line VIa-VIa in FIG. 5, and FIG. 6B is a view taken in the direction of arrows VIb-VIb in FIG. It is a description top view of a handle hole. It is the perspective view which illustrated the side groove and the step board which blocks up the upper end opening. It is a perspective view of the 1st prior art example. It is a vertical front view which shows the mounting state of a 1st prior art example. It is a perspective view of the 2nd conventional example. It is a vertical side view which shows the mounting state of a 2nd prior art example. It is a vertical front view which shows the mounting state of a 2nd prior art example.

Hereinafter, preferred embodiments of a cover for a side groove tread plate according to the present invention will be described with reference to the drawings.
1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a plan view showing an embodiment of the present invention, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a left side view of FIG. is there. In the following description, the side grooves, the tread plate, and the handle holes are described with the same reference numerals as those of the conventional examples.

  1 to 4, a cover 1 for a side groove tread plate includes a top plate 10 and vulcanized rubber legs 20 that are coupled to the back surface of the top plate 10 and hang down.

  The top plate 10 is composed of a flat plate formed of ABS resin having high impact resistance and wear resistance, and is arranged adjacent to the left-right direction X as shown in FIGS. 5, 6 (a), (b), and FIG. 7. The planar shape having an area sufficient to cover the handle hole C formed between the stepping plates B is an oval shape, the upper surface of the peripheral portion is gently chamfered, and has a flat lower surface, Two screw member insertion holes are provided penetrating in the thickness direction at positions to be described later.

  As shown in FIG. 1 to FIG. 4, the leg portion 20 has an inverted T-shaped cross section, and is individually molded by a method of cutting an extruded molded vulcanized rubber product at a predetermined length or by vulcanized rubber. It is produced by a technique. The leg 20 has a thick plate-like hanging part 21 extending vertically and in the longitudinal direction (hereinafter referred to as the front-rear direction) Y, and perpendicular to the lower end over the entire length Y of the hanging part 21 in the front-rear direction Y. And a flange portion 22 that extends in the direction (hereinafter referred to as the left-right direction) X, and the upper end surface of the hanging portion 21 is flat.

  The dimension L in the longitudinal direction (hereinafter referred to as the front-rear direction) of the top plate 10 is set to be sufficiently larger than the dimension L1 in the front-rear direction Y of the leg portion 20, and In the description, the dimension W1 in the left-right direction X of the flange portion 22 corresponding to the maximum dimension in the left-right direction X of the leg portion 20 is set slightly smaller than the dimension W in X in the left-right direction, and the upper end of the drooping portion 21 is set. The dimension W2 in the left and right direction X of the portion, that is, the thickness dimension W2 of the upper end portion of the drooping portion 21 is sufficiently smaller than the dimension W1 in the left and right direction X of the flange portion 22, and the tapping screw described later can be stably screwed in. It is set to an acceptable size.

Here, the coupling | bonding of the top plate 10 and the leg part 20 is demonstrated.
First, in FIG. 1 and FIG. 2, a vertical line C1 that equally divides the top plate 10 left and right through the plane center P of the top plate 10, and perpendicular to the vertical line C1 through the center P on the same plane and A horizontal line C2 that equally divides the top plate 10 forward and backward is hypothesized, and a vertical line C3 that equally divides the leg 20 left and right through the plane center P1 of the hanging portion 21 corresponding to the plane center of the leg 20; An imaginary horizontal line C4 that intersects the vertical line C3 through the center P1 on the same plane and that equally divides the leg 20 forward and backward is assumed. The two screw member insertion holes 11 and 11 are provided at symmetrical positions from the center P on the vertical line C <b> 1 of the top plate 10, and an interval L <b> 2 on the vertical line C <b> 1 is set at the leg 20. It is set smaller than the dimension L1 in the front-rear direction Y.

  The center P and the center P1, the vertical line C1 and the vertical line C3, and the horizontal line C2 and the horizontal line C4 are overlapped with each other so that the flat upper end surface of the hanging portion 21 is brought into contact with the flat lower surface of the top plate 10. Thereby, each screw member insertion hole 11 and 11 faces the upper end surface of the hanging part 21. In this state, a metal (stainless steel) tapping screw 30 is screwed into the hanging portion 21 through the screw member insertion holes 11 and 11 as shown in FIGS. The cover 1 for the side groove tread plate is formed by detachably connecting the leg portions 20 whose height H is smaller than the thickness T of the tread plate B (see FIGS. 6A and 6B).

  As shown in FIG. 7, the handle hole C has a hexagonal shape in which the dimension L3 in the front-rear direction Y is sufficiently larger than the inner method W3 in the adjacent arrangement direction (left-right direction) X of the footboard B, and the planar shape is elongated in the front-rear direction Y Presents. The dimension L3 in the front-rear direction Y is smaller than the dimension L in the front-rear direction Y of the top board 10 and the dimension L1 in the front-rear direction Y of the leg 20 as shown in FIGS. The inner method W3 in FIG. 7 is smaller than the dimension W in the left-right direction X of the top plate 10 and the wall thickness of the drooping portion 21 as shown in FIG. 5 and FIG. It is set larger than the dimension W2 (see FIG. 1) and smaller than the dimension W1 in the left-right direction of the flange portion 22 shown in FIGS. 5, FIG. 6B and FIG. 7, L4 is the dimension in the front-rear direction Y of the two sides facing each other in the left-right direction in the handle hole C, and from the dimension L1 in the front-rear direction Y of the leg portion 20. Is also set larger.

Next, a procedure for mounting the cover hole cover 1 of the side groove tread plate to the handle hole C will be described.
First, in FIG. 7, a vertical line C5 that equally divides the handle hole C left and right through the plane center P2 of the handle hole C, and the handle hole C that is orthogonal to the vertical line C5 through the center P2 on the same plane. An imaginary horizontal line C6 that divides C forward and backward is assumed.

  Then, the cover 1 for the side groove tread plate is placed directly above the handle hole C, and the centers P, P1 and center P2, the vertical lines C1, C3 and the vertical line C5, and the horizontal lines C2, C4 and the horizontal line C6 are overlapped vertically. The In this posture, when the top plate 10 is pushed down until its lower surface comes into contact with the upper surface of the stepping plate B at the outer peripheral edge portion of the handle hole C, the leg portion 20 is inserted into the handle hole C from the flange portion 22 side, and the flange portion 22 is inserted. Are bent upward in the vicinity of both ends in the left-right direction X, and are brought into surface pressure contact with the inner surface of the handle hole C in the left-right direction X by an elastic restoring force. That is, the flange portion 22 having a large friction coefficient comes into surface contact with the inner surface in the left-right direction X of the handle hole C by the elastic restoring force. Thereby, a big frictional force generate | occur | produces between the flange part 22 and the inner surface of the handle hole C, and can show the high retaining effect. As a result, it is possible to reliably prevent the side groove tread plate cover hole cover 1 from being lifted due to external factors such as vibrations, and further to prevent the side groove tread plate cover hole cover 1 from being pulled out from the handle hole C. Can be increased.

  1, L1 = 85 mm, W1 = 93 mm, W2 = 18 mm, H = 53 mm, flange portion 22 shown on the lower surface of the top plate 10 of L = 220 mm, L2 = 50 mm, W = 100 mm, wall thickness 6 mm shown in FIG. A cover 1 for a side groove tread plate shown in FIG. 2 to which a leg portion 20 having a thickness of 6 mm is coupled is prepared.

  When the cover 1 for the side groove tread plate is inserted into a handle hole C of L3 = 100 mm and W3 = 40 mm formed between the tread plates B, B of T = 60 mm, as shown in FIG. A pair of left and right rising portions 23, 23 are formed in which the vicinity of both ends in the left and right direction of the flange portion 22 is bent upward, and each rising portion 23, 23 having a large friction coefficient is formed in the left and right direction of the handle hole C by an elastic restoring force. Since the inner surface is in pressure contact with each other, a large frictional force is generated between each of the rising portions 23 and 23 and the inner surface of the handle hole C, and a high retaining effect can be exhibited. Further, since the upper ends of the rising portions 23 and 23 and the lower surface of the top plate 10 are separated from each other, a collision between the rising portions 23 and 23 and the lower surface of the top plate 10 is avoided, and the lower surface of the top plate 10 is the tread plate. Can be mounted in close contact with the upper surface of B. When the top plate 10 is pulled up in this state, it can be removed from the handle hole C, so that it can be easily attached to and removed from the handle hole C.

  Since the cover 1 for the side groove tread plate according to the present invention is mainly composed of two members, the top plate 10 and the rubber leg portion 20, the number of parts can be reduced and the structure can be simplified. Further, simply by pushing down the top plate 10, the leg portion 20 can be inserted into the handle hole C and the bottom surface of the top plate 10 can be attached to the top surface of the stepping plate B. When the top plate 10 is pulled up in this state, Since it can be removed, it is easy to attach to and remove from the handle hole C. In addition, since the rubber leg portion 20 having a large friction coefficient comes into surface contact with the inner surface of the handle hole C by the elastic restoring force in the handle hole C, a large friction is generated between the leg portion 20 and the inner surface of the handle hole C. Force is generated and a high retaining effect can be exhibited. As a result, it is possible to reliably prevent lifting due to external factors such as vibrations, and eventually removal from the handle hole, and reliability can be improved.

  The top plate 10 is made of a flat plate formed of ABS resin having high impact resistance and high wear resistance. For this reason, the height which protrudes on the surface of the tread board B is restrained small, and it can avoid a pedestrian's whisper etc. and can improve safety | security. Moreover, although it is influenced by passage of a pedestrian or a vehicle by being always exposed, damage caused by this influence can be suppressed.

  As shown in FIGS. 3 and 4, through the two screw member insertion holes 11, 11 provided in the top plate 10, a tapping screw 30 which is a screw nail screwed into the leg 20 is used to attach the leg 20 to the lower surface of the top plate 10. Therefore, the top plate 10 and the leg portion 20 can be easily and firmly connected to each other by the fastening force simply by screwing the tapping screw 30 into the leg portion 20 from the top plate 10 side. For this reason, it is not necessary to provide a screw hole in the leg 20 in advance, and the workability of coupling the top plate 10 and the leg 20 is improved. Moreover, even if the top plate 10 is damaged over time, it is economically advantageous because only the top plate 10 can be replaced and the leg portion 20 can be reused. That is, the screw hole of the leg portion 20 tapped at the time of coupling with the top plate 10 substantially disappears due to the elastic contraction when the leg portion 20 is separated from the top plate 10. As a result, the replaced top plate 10 and the reused leg portion 20 can be coupled by the tapping screw 30. In the present embodiment, the tapping screw 30 is used as the screw nail as described above. However, the screw nail is not limited to this type of screw nail, and a wood screw or the like may be used.

  As shown in FIGS. 1 and 2, the top plate 10 is provided with a plurality of small holes 12 penetrating vertically and a plurality of anti-slip projections 13 protruding slightly from the top surface of the top plate 10. Each small hole 12 communicates with the handle hole C to drain rainwater or the like into the side groove A and functions to ventilate the inside of the side groove A when the cover 1 for the side groove tread plate is used. 3, 4, 5 and 6 (a) and 6 (b), the illustration of each small hole 12 and each anti-slip protrusion 13 is omitted.

  The cover 1 for the side groove tread plate according to the present invention is not limited to the embodiment described above, and can be structurally modified as long as it does not depart from the spirit and technical idea thereof.

  The present invention covers a handle hole formed between adjacent treads by closing the top opening of the side groove, ensuring the safety of pedestrians and wheelchairs and avoiding foreign objects such as earth and sand falling into the side groove. It is useful as a cover for a tread plate handle hole.

1 Side groove tread plate cover hole cover 10 Top plate 20 Leg portion 21 Suspended portion 22 Flange portion 23 Rising portion 30 Tapping screw W1 Horizontal dimension of the flange portion W3 Horizontal direction of the handle hole A Side groove B Tread plate C Handle hole

Claims (5)

  A top plate that covers the handle hole formed between the treads disposed adjacent to each other by closing the upper end opening of the side groove, and a rubber leg that is coupled to the lower surface of the top plate and hangs down. A cover for a side groove tread plate, wherein the cover is configured to be inserted into the hand hole and pressed against the inner surface of the hand hole by an elastic restoring force. The cover for a side groove tread plate according to claim 1, wherein the top plate is a cover for a side groove tread plate made of a flat plate formed of a resin having high impact resistance and wear resistance. The cover for a handle hole for a side groove tread plate according to claim 1 or claim 2, wherein the leg portion extends vertically and in the front-rear direction and has a thick plate-like hanging portion whose upper end surface is coupled to the lower surface of the top plate. And a flange portion that extends in both the left and right directions from the lower end portion of the hanging portion, is bent upward by insertion into the handle hole, and is in surface pressure contact with the inner surface in the left and right direction of the handle hole by an elastic restoring force. A cover for a side hole tread plate having a reverse T-shaped cross section. In the cover for the handle hole of the side groove tread plate according to claim 3, the horizontal dimension of the flange portion is set larger than an inner method of the left and right direction of the handle hole and is bent upward by insertion into the handle hole. Further, a pair of left and right rising portions can be formed, and the upper end of each rising portion and the lower surface of the top plate are set to values that can be separated from each other. A cover for a handle hole of a side groove tread plate configured to be in surface contact with the inner surface in the left-right direction. The side groove tread plate cover hole cover according to any one of claims 1 to 4, wherein the top plate is provided with a plurality of screw member insertion holes, and screwed into the leg portions through the screw member insertion holes. A cover for a side groove tread plate with a leg portion detachably coupled to the lower surface of the top plate by screw nails.

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