JP6489430B2 - Lid for opening and closing the lid - Google Patents

Description

  The present invention relates to a configuration of an opening / closing jig used for an operator to manually open and close a relatively heavy lid such as a manhole cover.

  As an opening / closing jig used for manually opening and closing a relatively heavy lid such as a manhole cover, for example, a manhole cover switch shown in Patent Document 1 or a manhole cover disclosed in Patent Document 2 Opening and closing tools are already known.

The switch of the manhole cover of Patent Document 1 is provided with a grip part gripped by an operator, a rod-like member connected to one end of the grip part, and a grip-like part of the rod-like member. And an insertion part formed with a projecting part extending in the direction.
And according to the switch of the manhole cover of such patent document 1, after inserting the insertion part into the long hole of the manhole cover, the rod-like member of the switch is rotated 90 degrees, and the overhang part is the manhole cover. The manhole cover can be opened by performing an operation of lifting the manhole cover upward by gripping the grip portion in a state of being caught on the side periphery of the long hole.

The manhole cover opening / closing tool of Patent Document 2 is provided between a pedestal, a suspension bar whose base end is swingably attached to the pedestal, and a base end and a distal end supported by the base of the suspension bar. And a hook portion attached to the hook portion mounting portion.
And according to such a manhole cover opening / closing device of Patent Document 2, the base is installed on the periphery of the manhole, the hook is hooked on the center of the manhole cover, and the tip of the suspension rod is held. By performing an operation of swinging to the pedestal side, the manhole cover can be opened by lever action.

JP-A-6-108486 Japanese Utility Model Publication No. 1-1141847

  However, in the operation of opening the manhole cover using the manhole cover switch of Patent Document 1, it is necessary to lift the relatively heavy manhole cover only by human power, and thus the work load is large, and depending on the work conditions, a plurality of manhole covers may be used. An operator needs to lift the manhole cover.

  In this respect, since the operation of opening the manhole cover using the manhole cover opening / closing tool of Patent Document 2 utilizes the lever action as described above, the force for lifting the manhole cover switch of Patent Document 1 by the operator The work burden is reduced compared to the case of using only.

  However, when the manhole cover switch disclosed in Patent Document 1 is used, the pedestal that constitutes the fulcrum is more than the peripheral part of the manhole. Since it is disposed outside, the floor surface and road surface on which the pedestal is disposed may be a soft ground or the like. For this reason, the pedestal becomes unstable, and the pedestal may move or fall when the suspension bar is operated, and the manhole cover may not be lifted well.

  Accordingly, the present invention provides a lid opening and closing treatment that can place the portion constituting the fulcrum on the inner side of the peripheral portion of the vertical hole while utilizing the lever action so that the operator can operate it alone. The purpose is to provide ingredients.

Lid closing jig according to the present invention includes a rod, a lid closing jig for opening and closing the lid for closing the longitudinal hole which is open upwardly, the rod body, the rod A contact portion is provided at one end in the longitudinal direction of the body, and the contact portion has one end side portion in the longitudinal direction of the rod body in the shape of a quadrangular prism having a square or rectangular cross section, and the upper surface of the lid below And a handle that the operator can hold by hand at the other end in the longitudinal direction of the rod body, and the contact portion and the handle is projected protrusion from between the hand portion, this tip of the projecting portion, pulling hook can hang pull the pull hook portion provided in the edge vicinity of the lid is provided, further, the rod A leg portion is provided between the protruding portion of the body and the handle portion, and the lid portion is lifted obliquely by the leg portion. It is for holding an open state, and is configured to have a leg main body and a shaft portion that connects one of the leg main bodies in the longitudinal direction to the rod body. In the range from a state along the longitudinal direction of the rod body to a state intersecting with the rod body at a desired angle, the rod body can swing around the shaft portion . Claim 1). The vertical hole opened upward is, for example, a manhole. The lid is, for example, a manhole cover.

The operator holds the handle, hooks the hooking part to the hooked part of the lid, makes the contact part contact the lid, and then makes a circular track around the contact part. To move the handle part obliquely upward. As a result, the place where the abutment part comes into contact with the lid is the fulcrum, the place where the worker applies the force by holding the handle part is the force point, and the place where the hooking part is hooked on the hooked part acts The point that is in contact with the opening edge of the vertical hole on the side opposite to the handle portion of the lid body is the second fulcrum, and the lid body is inclined while contacting the opening edge of the vertical hole by lever action. It is lifted and opened.
In addition, since the fulcrum is a place where the abutting part is in contact with the lid, the fulcrum is always arranged on a relatively hard surface, so that the fulcrum does not become unstable.

In addition, the leg is usually in a state along the rod, and when the lid is lifted obliquely, the leg is swung so that the end of the leg is the floor or road surface around the periphery of the vertical hole. By abutting on a flat surface, the lid can be lifted diagonally and kept open.

In the lid opening / closing jig according to the present invention, the leg main body is a U-shaped frame having a cross section opened upward, and the inner surface of two inner surfaces of the three inner side surfaces of the leg main body. The inner side surface in between is in contact with the lower surface of the rod body, thereby restricting the leg body from swinging from a state along the longitudinal direction of the rod body, and the shaft portion of the leg body. A stopper is provided at the end which becomes the side, and the stopper abuts on the upper surface of the rod body, thereby restricting the swinging from a state intersecting the rod body at a desired angle. (Claim 2).

  As described above, according to the lid opening / closing jig according to the present invention, the operator holds the handle, hooks the hooking portion on the hooked portion of the lid, and the contact portion on the lid. After making the contact state, when performing an operation to move the handle portion diagonally upward so as to draw a circular path centering on the contact portion, the contact portion contacts the lid. Is the fulcrum, the point where the worker applies the force by holding the handle part is the force point, the part where the hook is hooked on the hooked part is the point of action, and the handle part of the lid The portion in contact with the opening edge of the vertical hole on the opposite side becomes the second fulcrum, and the lid can be lifted obliquely and opened by the lever action. For this reason, the worker can open and close the relatively heavy lid with a relatively small force.

  Further, according to the lid opening / closing jig according to the present invention, since the fulcrum is a place where the abutting portion abuts on the lid, the fulcrum is always arranged on a relatively hard surface. Therefore, the operation for opening and closing the lid using the lever action can be reliably performed.

Furthermore, according to the lid opening / closing jig according to the present invention, the leg is normally in a state along the rod, and the leg is supported by the rod when the lid is lifted obliquely. By swinging the leg portion around the location and bringing the end of the leg portion into contact with the peripheral surface of the vertical hole, the lid can be lifted obliquely and kept open.

FIG. 1 is an explanatory view showing a state in use utilizing the lever action of a lid opening / closing jig according to the present invention, and FIG. 1 (a) is a plan view of the lid opening / closing jig, 1 (b) is a side view of the lid opening / closing jig, FIG. 1 (c) is a bottom view of the lid opening / closing jig, and FIG. 1 (d) is A in FIG. 1 (c). -A sectional view, FIG.1 (e) is BB sectional drawing of FIG.1 (c). FIG. 2 is an explanatory view showing a state in which the legs of the lid opening / closing jig according to the present invention are opened. FIG. 3 is a view for explaining an example of a process for opening a manhole cover using the lid opening / closing jig according to the present invention, and includes a lid opening / closing jig, a manhole cover, and a hooked portion. FIG. FIG. 4 is an explanatory view showing a modification of the hook portion of the lid opening / closing jig according to the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The lid opening / closing jig 1 shown in FIGS. 1 and 2 is suitable for opening and closing a mold having a hooked portion 101 provided with a horizontal bar portion that can be hooked with a hook or the like in the manhole cover 100. It is a simple jig. Since the structure having the horizontal bar portion of the hooked portion 101 is various and may be a known one, its description is omitted.

  In this embodiment, the lid opening / closing jig 1 is mainly composed of a rod body 2 made of a material such as a rigid metal. However, the material of the rod body 2 is not particularly limited to a metal as long as it has a property that it does not bend or break even when used at a high frequency.

  In this embodiment, the rod body 2 extends linearly, and is, for example, a relatively long one that is longer than the diameter of the manhole cover 100. And the rod 2 has the contact part 21 contact | abutted to the substantially planar upper surface 100a of the manhole cover 100 in the one end of a longitudinal direction.

  As shown in FIG. 1D, the end side portion having the contact portion 21 of the rod body 2 is in contact with the upper surface 100a of the manhole cover 100 without rattling and can maintain the contact state. The cross section is square or rectangular, and has a quadrangular prism shape with a contact surface 2a below. However, in order to facilitate manufacture, processing, and the like of the rod body 2, the portion other than the contact portion of the rod body 2 may also be a square column having a square or rectangular cross section.

  Further, the rod body 2 has a handle portion 22 over a predetermined range from the end opposite to the contact portion 21. The handle portion 22 is a part for an operator to hold with one hand or both hands. In this embodiment, the handle portion 22 has a quadrangular prism shape. May be.

  Further, the rod body 2 has a protruding portion 23 extending downward between the contact portion 21 and the handle portion 22, and has a hooking portion 24 at the tip of the protruding portion 23. That is, when the lower surface 2a of the rod body 2 continues to the handle portion 22 side, the projecting portion 23 projects from the lower surface 2a. In this embodiment, the hook portion 24 is curved in an arc shape and is inserted below the horizontal bar portion of the hooked portion 101 of the manhole cover 100 to be hooked on the horizontal bar portion of the hooked portion 101. It has become easier. Further, the projecting dimension of the projecting portion 23 from the rod 2 forms a sufficient space between the manhole 200 and the manhole cover 100 for visual recognition in the manhole 200 when the manhole cover 100 is lifted obliquely. There is no particular limitation as long as it is possible.

  Is the dimension L1 (shown in FIG. 2) from the end of the rod 2 having the contact portion 21 to the hooking portion 24 the same as the dimension from the center of a general manhole cover 100 to the hooked portion 101, for example? It is an approximate value. However, as described below, the contact portion 21 is brought into contact with the position of the upper surface 100a between the hooked portions 101 and 101 of the manhole cover 100, and the hook portion 24 is hooked on the hooked portion 101. If the manhole cover 100 can be lifted obliquely, the dimension L1 is not particularly limited.

  In this embodiment, the rod body 2 has a leg portion 3 for holding the inclined state of the rod body 2 between the protruding portion 23 and the handle portion 22.

  The leg portion 3 is provided at a lower end portion of the leg main body 31, a shaft portion 32 that connects the leg main body 31 to the rod body 2 so as to be swingable, and a lower end portion of the leg main body 31 that is away from the shaft portion 32. The flat bar 33 and the stopper 35 provided on the upper end portion on the side close to the shaft portion 32 of the leg main body 31 are provided.

  As shown in FIG. 1 (particularly FIG. 1 (e)), the leg main body 31 is a U-shaped frame having a cross section opened upward, as shown in FIG. 1 (b) and FIG. In addition, the shaft 32 and the stopper 35 described below, from the state along the longitudinal direction of the rod body 2 to the state intersecting with the longitudinal direction of the rod body 2 (in this embodiment, the state intersecting at an angle of 90 degrees). It can swing within the range.

  The three inner side surfaces 31 a, 31 b and 31 c of the leg main body 31 can contact the lower surface 2 a and the side surfaces 2 b and 2 c of the rod body 2 in a state along the longitudinal direction of the rod body 2.

  The flat bar 33 is used to prevent the lid opening / closing jig 1 from falling down. The flat bar 33 intersects the lower end of the leg main body 31 at a right angle, and the leg main body 31 and the flat bar 33 form a T shape. ing. That is, the horizontal width of the flat bar 33 is larger than the horizontal width of the rod 2 as shown in FIGS. 1 (a) and 1 (c). As a result, when the flat bar 33 contacts the floor or road surface R on the periphery of the manhole 200, the flat bar 33 contacts the surface R in a relatively wide range. Therefore, the leg body 31 and thus the lid opening / closing jig 1 can be supported in a stable state. The flat bar 33 is made of, for example, metal, and is fixed to the leg main body 31 by welding or the like.

  In this embodiment, in order to maintain the leg main body 31 along the longitudinal direction of the rod body 2, in this embodiment, the engaging protrusions 25 are formed on the side surfaces 2b and 2c of the rod body 2, respectively. In addition, engagement holes 34 and 34 are formed at positions corresponding to the engagement protrusions 25 and 25 along the rod body 2 of the leg main body 31. Although not shown, the engaging protrusion 25 can be projected and retracted from the side surfaces 2b and 2c of the rod body 2 by a spring or the like. It protrudes from 2c and is inserted and engaged in the engagement hole 34.

  However, the structure for maintaining the leg main body 31 along the longitudinal direction of the rod 2 is not limited to the structure including the engagement protrusion 25 and the engagement hole 34 described above. For example, although not shown, a rubber band or a string may be wound, or a screw or the like may be inserted in a state where the holes formed in both the leg main body 31 and the rod body 2 are matched.

  The stopper 35 is for preventing the angle at which the leg body 31 intersects the rod 2 from becoming larger than a desired angle (for example, 90 degrees), and has a U-shaped plate shape. The leg portion 31 has a portion laid between the portion having the side surface 2b and the portion having the side surface 2c at the upper end on the end side of the shaft portion 32 of the leg portion body 31. The stopper 35 is also made of, for example, metal, and is fixed to the leg main body 31 by welding or the like.

  Thereby, even if the leg main body 31 tries to rotate around the shaft portion 32 at an angle of a desired angle (for example, 90 degrees) or more with respect to the rod 2, the installation portion of the stopper 35 of the leg main body 31 is not a rod. 2, the angle at which the leg body 31 intersects with the rod 2 is prevented from becoming larger than a desired angle (for example, 90 degrees).

  A process of lifting the manhole cover 100 using the lid opening / closing jig 1 having the above-described configuration will be described with reference to FIG. However, the shapes of the lid opening / closing jig 1, the manhole lid 100, and the hooked portion 101 shown in FIG. 3 are schematically shown for convenience of explanation of the process, and the actual lid opening / closing operation is performed. The shapes of the jig 1, the manhole cover 100, and the hooked portion 101 do not necessarily match.

  First, as shown in FIG. 3A, after hooking the hook portion 24 of the rod body 2 on the hooked portion 101 of the manhole cover 100, the contact portion 21 of the rod body 2 is moved to the manhole cover 100. It abuts on the upper surface 100a. Next, while holding the handle portion 22 of the rod 2 and maintaining the contact portion 21 in contact with the upper surface 100a of the manhole cover 100, as shown by the arrow in FIG. The cover 100 is lifted obliquely upward so as to draw a circular orbit around the contact portion 21 in contact with the upper surface 100a of the lid 100. At the stage of these processes, the leg main body 31 is fixed in a state along the longitudinal direction of the rod body 2 so as not to hinder the work.

  As a result, the place where the contact portion 21 is in contact with the upper surface 100a of the manhole cover 100 is a fulcrum, the place where the worker applies force with the handle portion 22 is the focus point, and the hook portion 24 is the hooked portion 101. 3 is the point of action, and the point of contact with the opening edge of the manhole 200 opposite to the handle 22 of the manhole cover 100 is the second fulcrum. As shown in b), the manhole cover 100 can be lifted diagonally and opened.

  Then, the leg main body 31 is swung around the shaft portion 32, and the flat bar 33 is brought into contact with the surface R located on the outer periphery of the manhole 200, thereby, as shown in FIG. It is possible to hold the lid 100 in an opened state by being lifted obliquely.

  A modification of the lid opening / closing jig 1 shown in FIG. 1 is shown in FIG. Hereinafter, the lid opening / closing jig 1 will be described with reference to FIG. However, the same components as those in the lid opening / closing jig 1 shown in FIG.

  The lid opening / closing jig 1 shown in FIG. 4 is suitable for opening and closing the manhole cover 100 when the hooked portion is a through hole (not shown) formed in the manhole cover 100. It is a simple jig. That is, the hook portion 26 of the lid opening / closing jig 1 has a so-called substantially letter-shaped shape whose tip is bent at an angle larger than 90 degrees, and has a width L2 (see FIG. 4B). ) Is smaller than the through hole formed in the manhole cover 100. The arrangement and shape of the through holes of the manhole cover 100 are various and may be known ones, and thus the description thereof is omitted.

  As a result, after inserting the hooking portion 26 into the through hole of the manhole cover 100, the end is shifted from the position of the opening of the through hole of the manhole cover 100 to the outer peripheral side of the manhole cover 100. By moving the body opening / closing jig 1, the front end portion of the hook portion 26 can be hooked while being brought into contact with the inner side surface that is the peripheral portion of the through hole of the manhole cover 100. That is, the through hole of the manhole cover 100 and the peripheral portion thereof function as a hooked portion.

  However, after the hooking portion 26 is inserted into the through hole of the manhole cover 100 and hooked around the periphery thereof, the manhole cover 100 can be lifted obliquely by the same operation as the lid opening / closing jig 1 of FIG. It is possible to hold the manhole cover 100 in a state where the manhole cover 100 is lifted obliquely upward.

DESCRIPTION OF SYMBOLS 1 Lid body opening / closing jig | tool 2 Rod body 2a Lower surface 21 Contact part 22 Handle part 23 Projection part 24 Hook part 26 Hook part 3 Leg part 31 Leg part main body 31a Inner side surface 31b Inner side face 31c Inner side face 32 Shaft part 33 Flat bar 35 Stopper 100 Manhole cover 100a Upper surface 101 Hooked part 200 Manhole

Claims (2)

A lid body opening / closing jig for opening and closing a lid body that has a rod body and closes a vertical hole opened upward,
The rod is
A contact portion is provided at one end in the longitudinal direction of the rod body, and the contact portion has a square column shape having a square or rectangular cross section at one end side in the longitudinal direction of the rod body, and the lid body is provided below. And a handle that can be held by the operator at the other end in the longitudinal direction of the rod body .
A hooking portion that protrudes from between the abutting portion and the handle portion and can be hooked to a hooked portion provided near the edge of the lid at the tip of the protruding portion. Provided,
Furthermore, a leg portion is provided between the protruding portion of the rod and the handle portion,
The leg portion is for holding the lid body in a state where the lid body is lifted obliquely, and the leg portion main body and a shaft portion for connecting one of the leg portion main bodies in the longitudinal direction to the rod body And configured with
The leg main body can swing around the shaft in a range from a state along the longitudinal direction of the rod body to a state intersecting the rod body at a desired angle. A lid opening / closing jig characterized by that. The leg main body is a U-shaped frame having a cross section opened upward, and an inner side surface between two inner side surfaces of the three inner side surfaces of the leg main body is a lower surface of the rod body. By abutting, the leg body is restricted from swinging from a state along the longitudinal direction of the rod,
A stopper is provided at the end of the leg body on the shaft side, and the stopper abuts against the upper surface of the rod body, thereby swinging more than a state intersecting the rod body at a desired angle. The lid opening / closing jig according to claim 1, wherein the lid opening / closing jig is restricted .

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