JP5229660B2 - Grating lid stopper - Google Patents

Description

  The present invention relates to a grating lid detachment preventing device for a road drain that prevents a grating lid installed at an opening of a catchment provided on a shoulder of a roadway from coming off the opening.

  In general, the drainage opening on the shoulder portion of the road is closed by a grating lid so that the drainage can be performed smoothly. In particular, on highways, a slip-off preventing device is used to prevent the automobile from jumping up when traveling on it.

  As shown in FIG. 9, the conventional latch lid detachment prevention device is provided with engagement rods 2 that penetrate and penetrate the outer peripheral frame 1 of the grating lid separately at left and right symmetrical positions, respectively. The joints 2 and 2 are respectively slid separately in the axial direction, and the leading ends thereof are inserted into and removed from the engagement rod insertion holes 5 and 5 opened on the inner peripheral surface of the lid receiving portion 4 of the water collecting rod 3. It has been known.

  Since this conventional grating lid detachment prevention device is designed to operate the engagement rods 2 and 2 individually, after the grating lid is mounted, there is a case where the operation for locking off (lock operation) may be forgotten. Even when the operation of only one of the engagement rods is forgotten, there is a problem that the grating lid may jump up due to traveling of the vehicle and cause a serious accident.

As a solution to such a problem, there is a structure shown in FIGS. 10 and 11 (Patent Document 1). In this apparatus, a lid receiving frame member 11 is fixed to an opening of a water collecting basin 10 opened on a road surface, and a grating lid 12 is fitted into the lid receiving frame member 11 so that the bottom surface of the grating lid 12 is horizontally aligned. A pair of retaining engagement rods 13 and 13 that are slidably supported and engaged under the lower edge of the lid receiving frame member 11 are provided so as to be operated in directions opposite to each other by the operation of the rotating arm 14. The turning operation shaft 15 fixed to the turning center of the turning arm 14 can be turned by a dedicated handle 16 so that the handle 16 can be removed only when the engaging rods 13 and 13 are in the protruding state. By doing so, the locking operation after the lid is applied is not forgotten.
JP 2001-40754 A

  However, in the grating lid detachment prevention device having the structure shown in FIGS. 10 and 11, it is necessary to attach the opening frame portion 4 in addition to the water collecting tank, which increases the number of parts and the number of assembling steps. There is a problem of becoming high. Further, as shown in FIG. 9, there is a problem that it cannot be diverted to an existing drainage port using a grating lid detachment preventing device having a structure in which the engagement rod is made to enter and exit symmetrically. It was.

  In view of such a conventional problem, the present invention provides an engagement rod insertion hole into which an engagement rod for preventing the grating lid from coming off is inserted at a symmetrical position on the inner peripheral surface of the grating lid fitting portion of the drain port. The purpose is to provide a grating lid locking device that can handle existing drain outlets without specially adding significant processing to the opening, and never forgets the locking operation after the lid is applied. It was made as.

In order to solve the conventional problems as described above and achieve the intended object, the feature of the invention described in claim 1 is that a lid receiving portion is provided at the opening of the drain opening opened on the road surface. A metal grating lid is detachably fitted in the receiving portion, and the grating lid includes an outer peripheral frame portion that fits into the lid receiving portion, and a grating portion integrated into the outer peripheral frame portion. In addition, the grating lid is provided with a pair of engagement rods that enter / exit from the outer peripheral frame portion and an engagement rod entry / exit operation mechanism for allowing the engagement rods to enter / exit, and the engagement rod is attached to the grating lid. The engagement rods are supported so as to be operable only in the axial direction, and both the engagement rods are arranged on the same straight line so that their proximal ends face each other. It is located between the base ends facing each other, for operation A rotation center shaft that is swiveled by the handle, a pair of cams fixed to the rotation center shaft, and a pair of cam driven members that are connected to the engagement rods and reciprocated by the cams. The leading edge of the engaging rod is inserted into the engaging rod insertion hole provided in the lid receiving portion by the engaging rod protruding and retracting operation mechanism , and the grating lid is prevented from coming off. In the grating lid detachment prevention device for the road drain outlet,
The cam is a groove cam formed in an arc shape with one end close to the rotation center axis and the other end away from the rotation center axis on the base plate fixed to the rotation center axis. wherein in the groove cam cam follower member is fitted, being adapted to the engaging rod with the cam follower member is reciprocated in the axial direction by the base plate to reciprocally rotate said cam follower member Has a shape obtained by bending a rod-shaped steel material into a substantially U shape, and one of a pair of parallel shaft portions constituting the U shape is a shorter shaft portion than the other, One short shaft portion is inserted into the groove cam, and the tip of the other long shaft portion is penetrated and engaged with the end portion of the engaging rod at the center of the grating lid, and the cam follower member is The bottom part constituting the bottom of the U-shape is arranged in parallel with the engagement rod. , Is fitted into the guide groove formed in the fixed guide member under the bottom surface of the grating lid via a support frame, it lies in the reciprocally movable in the guide groove direction.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, a cylinder having a key hole on one end face and a shaft insertion hole on the other end face is provided on the grating lid, The handle is installed so that the handle can be inserted into the keyhole from the surface of the grating lid, and the rotation center shaft is installed in the cylinder so as to be able to reciprocate in the cylinder. By energizing the cylinder in the keyhole direction, the tip of the rotation center shaft is fitted into the keyhole and cannot be rotated, and the handle is inserted into the keyhole while pushing the rotation center shaft. The rotation center axis can be rotated, the handle can be extracted only at the angle at the time of insertion, and the engagement rod moves in the engagement direction in conjunction with the operation in the return direction of the handle. Is As in that it has to.

  In the grating lid detachment preventing device according to the present invention, as described above, the engagement rod is supported so as to be operable only in the axial direction with respect to the grating lid, and both the engagement rods are on the same straight line. And the engagement rod entry / exit operation mechanism is disposed between the opposed proximal ends of the engagement rod and is pivoted by an operation handle. And a pair of cams fixed to the rotation center shaft and a pair of cam follower members connected to the respective engagement rods and reciprocated by the cams. A groove cam formed in an arc shape in which one end is close to the rotation center axis and the other end is away from the rotation center axis, on the base plate fixed to the movement center axis; The cam follower is fitted and the base plate is moved forward. The engagement rod is reciprocated in the axial direction together with the cam follower by rotating, and the engagement rod provided at the lid receiving portion by moving the engagement rod in the protruding direction. Since the grating lid is prevented from coming off by being inserted into the insertion hole, an engagement rod for preventing the grating lid from coming off is inserted into the left and right symmetrical positions of the inner peripheral surface of the grating lid fitting portion of the drain outlet. It is possible to cope with an existing drainage port having an engaging hole insertion hole without adding significant processing to the opening.

The cam follower has a shape obtained by bending a rod-shaped steel material into a substantially U shape, and one of a pair of parallel shaft portions constituting the U shape is the other. The short shaft is inserted into the groove cam, and the tip of the other long shaft is passed through the end of the engagement rod at the center of the grating lid. Engaged,
The cam follower is formed in a guide groove formed in a guide member having a bottom portion constituting the bottom of the U-shape arranged in parallel with the engagement rod and fixed below the bottom surface of the grating lid via a support frame. By being fitted inside and enabling reciprocation in the direction of the guide groove , the restriction on the opening shape of the engaging portion can be reduced. In addition, since the two engagement rods can be suitably fitted to the engagement portion and the grating lid can be locked by one handle operation, the operation is facilitated.

Further, the cam follower is restricted by the guide groove so that it can move in a horizontal direction without rotating, thereby allowing the cam follower and the engagement rod to be connected and allowing the groove cam to move in the vertical direction. The structure may be a simple fitting structure between a simple shaft and a hole or groove.

  Further, the cam follower member is formed in a substantially U shape, and one end portion thereof is linked to the engagement rod, and the other end portion is fitted into the groove cam. The mechanism has a guide portion for making the cam follower non-rotatable and limiting the moving direction to the longitudinal direction of the engagement rod, so that the engagement can be achieved without enlarging the cam member. Since the interference between the joint and the engagement rod operating portion can be prevented, the engagement rod operation mechanism can be reduced in size.

  Further, a cylinder having a key hole on one end surface and a shaft insertion hole on the other end surface is installed on the grating lid so that the handle can be inserted into the key hole from the surface of the grating lid. The rotation center shaft is installed in the cylinder so as to be capable of reciprocating in the cylinder, and the rotation center shaft is urged toward the keyhole of the cylinder by a spring, and the tip of the rotation center shaft is Is inserted into the keyhole and cannot be rotated, and the rotation center axis can be rotated by inserting the handle into the keyhole while pushing the rotation center axis. The grating lid can be pulled out only at the angle at the time of insertion, and the engagement lid is moved in the engagement direction in conjunction with the operation in the return direction of the handle. When fitting to the lid frame, it is necessary to insert the handle into the cylinder and rotate it so that the engagement rod is stored in the grating lid frame, and then the handle is rotated to engage the engagement rod. Since the handle cannot be pulled out unless the engagement portion is engaged, it is possible to prevent the locking of the grating lid from being forgotten.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIGS. 1-8 has shown an example of implementation of the grating lid removal prevention apparatus which concerns on this invention. In the figure, reference numeral 20 is a drain outlet such as a water collecting basin opened on the road surface, and 21 is a lid receiving part provided at the opening. A metal grating lid 23 is detachably fitted in the lid receiving portion 21. The grating lid 23 includes an outer peripheral frame portion 24 having a shape that fits in the lid receiving portion 21 and a grating portion 25 integrated into the outer peripheral frame portion 24. The grating portion 25 is composed of a vertical member 25a and a horizontal member 25b that intersect vertically and horizontally in the outer peripheral frame portion 24.

  The grating lid 23 is provided with a pair of engagement rods 26 and 26 whose tips are moved in and out of the outer peripheral frame portion 24 and an engagement rod loading / unloading operation mechanism 30 for allowing the engagement rods to be loaded and unloaded. The engagement rods 26 and 26 are axially movable in engagement rod guide holes formed in the engagement rod support member 27, the outer peripheral frame portion 24, and the cross member 25b provided between the vertical members 25a of the grating lid 23. Inserted, both engagement rods 24, 24 are arranged on the same straight line, and their base end sides are installed facing each other.

  Both engagement rods 26, 26 are moved in the axial direction by an engagement rod loading / unloading operation mechanism 30 supported at the central portion of the grating lid 23. The grating lid 23 is prevented from coming off by being inserted into the engagement rod insertion holes 28, 28 formed in the portion 21.

  The engagement rod entry / exit operation mechanism 30 is located between the proximal ends of the engagement rods 26, 26 facing each other, and is provided with a rotation center shaft 32 that is turned by an operation handle 52 and a rotation center shaft 32. A pair of fixed cams 33, 33 and a pair of cam driven members 34, 34 connected to the respective engagement rods and reciprocated by the respective cams 33, 33 are configured.

  As shown in FIGS. 6 and 7, the groove cams 33 and 33 are arranged on a base plate 35 fixed to the rotation center shaft 32, with one end being close to the rotation center axis and the other end being the rotation center axis. A pair of groove cams 33, 33 formed in a circular arc shape away from the center is used. In the groove cams 33, 33, the base plate 35 is formed at a rotation angle of about 45 degrees around the rotation center shaft 32.

  The cam driven member 34 has a shape obtained by bending a rod-shaped steel material into a U shape, and one of a pair of parallel shaft portions 34a and 34b constituting the U shape is shorter than the other. This is inserted into the groove cam 33, and the tip of the other long shaft portion 34b is penetrated and engaged with the end portion of the engaging rod 26 on the center side of the grating lid.

  A bottom portion 34c constituting the U-shaped bottom of the cam driven member 34 is fitted in a U-shaped guide groove 36a in a cross section formed in a guide member 36 disposed in parallel with the engagement rod 26, The cam follower 34 can be reciprocated in the direction of the guide groove 36a with its bottom side 34c regulated in the length direction of the guide groove 36a. It has become. The guide member 36 is fixed below the bottom surface of the grating lid 23 via a support frame 37.

As described above, by restricting the cam driven member 34 so that it can be moved in the horizontal direction without rotating the cam driven member 34 by the guide groove 36a, the cam driven member 34 and the engagement rod 26 are connected to each other and the groove cam. A simple fitting structure between the shaft and the hole or groove is sufficient as the allowable structure for the vertical movement of 33.

The rotation center shaft 32 is accommodated in a cylinder 40 that is vertically fixed to the central portion of the grating lid 23. This cylinder 40 is fixed to the central portion of the support frame 37 in the previous period, and a bottom plate 41 is fixed to the bottom surface and a top plate 42 is fixed to the top surface .

  On the other hand, the rotation center shaft 32 integrally has a large-diameter head portion 32a at the top, and below that a shaft portion 32b having a smaller diameter is integrally formed in a coaxial arrangement. The inner diameter of the cylinder 40 is formed such that the head 32a can rotate and slide in the axial direction.

  A shaft portion 32b of the rotation center shaft 32 projects downward through a through hole 41a formed in the bottom plate 41, and a base plate 35 on which the above-described groove cams 33, 33 are formed at the lower end of the shaft portion 32b. The central part of the rotation is integrated in a non-rotatable state so that the rotation center shaft 32 and the base plate 35 are rotated together.

  A coil spring 43 is fitted on the outer periphery of the rotation center shaft 32 between the lower surface of the head 32a and the bottom plate 41, whereby the rotation center shaft 32 is urged upward, and the head portion is always at the head. The top surface is in contact with the lower surface of the top plate 42.

  A handle insertion hole 50 is opened in the top plate 42, and a handle engaging ridge 51 is projected from the top surface of the head of the rotation center shaft 32. A handle head 52a at the distal end of the handle 52, which will be described later, is inserted into the handle insertion hole 50, and the handle engagement protrusion 51 is fitted into the engagement groove 53 on the distal end surface of the head 52a and rotated. Thus, the rotation center shaft 32 is rotated. The base plate 35 is rotated by this rotation operation, and the engagement rod 26 is reciprocated by the groove cam 33 via the cam driven member 34.

  As shown in FIG. 8, the handle insertion hole 50 is formed in an oval-like shape (hereinafter referred to as an oval shape) in which a circular left and right are cut out in parallel, and the handle head 52a is also formed in the same shape. Thus, the handle head 52a is structured such that it cannot be inserted into and removed from the handle insertion hole 50 only in a direction aligned with the handle insertion hole 50.

  A shaft portion 52b having a thickness equal to or smaller than that of the short diameter portion of the head portion is integrally provided at the center portion of the handle head portion 52a, and the handle head portion 52a is formed in the hole 50 as shown in FIG. By pushing the rotation center shaft 32 in the cylinder 40 against the force of the coil spring 43 and inserting the handle head 52a under the top plate 42 to push the top plate 42 into the top plate 42. The rotating center shaft 32 can be rotated by turning downward and becoming rotatable.

  Further, the handle 52 cannot be removed when the handle head 52a is turned to a position other than the position aligned with the hole 50 below the top plate 42. In other words, the handle head 52a cannot be removed at an angle other than the angle aligned with the hole 50.

  Further, when the handle head 52a is in alignment with the hole 50, the engagement cam 26 is positioned in the direction pushed out by the groove cams 33, 33, that is, the front end of the engagement cam 26 is on the grating lid 23. In this state, the handle 52 is pushed about 45 degrees by pushing the head 52 under the top plate 42 and turning about 45 degrees. The engagement cam 26 is positioned in the retracting direction by the groove cams 33, that is, the tip of the engagement cam 26 does not protrude from the outer peripheral frame portion 24 of the grating lid 23.

  As a result, the handle 52 cannot be pulled out when the engagement rod 26 is inserted into the hole 50 and moves in the pulling direction, that is, when the grating lid 23 is unlocked, and the handle 52 is returned to the locked state from the unlocked state. This makes it possible to prevent the user from forgetting to lock after the unlocking operation.

  The base plate 35 fixed to the rotation center shaft 32 moves with the vertical movement of the rotation center shaft 32, but the shaft portion 34a of the cam follower member 34 inserted into the groove cam 33 is provided. The shaft portion 34a is always inserted into the grooved cam 33 so as to allow this.

  The rotation center shaft 32 is pushed down by the handle head 52a, but is biased upward by the coil spring 43, so that the top surface follows the top plate 42 following the removal of the handle head 52a. The hole 50 is raised to a position for closing. At this raised position, the handle engaging protrusion 51 on the top surface of the rotation center shaft 32 is engaged with the locking notches 50a and 50a formed in the short diameter portion of the hole 50, thereby rotating. The central shaft 32 is prevented from rotating in the unlocking direction.

It is a top view which shows an example of the grating lid removal prevention apparatus which concerns on this invention. It is a longitudinal cross-sectional front view same as the above. It is a longitudinal cross-sectional side view same as the above. It is a partial expanded sectional view which shows the state at the time of the grating lid lock | rock of the engaging rod entry / exit operation mechanism in the apparatus shown in FIG. It is a partial expanded sectional view which shows the state at the time of the grating lid lock release same as the above. It is a top view which shows the positional relationship of the engagement rod, the cam member, and the cam follower member at the time of making the engagement rod protrude in the apparatus shown in FIG. It is a top view which shows the positional relationship of an engagement rod, a cam member, and a cam follower member when accommodating the same engagement rod. FIG. 2 is a perspective view showing an operation handle head and an engagement rod insertion hole portion of the apparatus shown in FIG. It is a partial notch top view which shows an example of the conventional grating lid removal prevention apparatus. It is a partial notch top view which shows another example of the conventional grating lid removal prevention apparatus. It is a longitudinal cross-sectional view same as the above.

DESCRIPTION OF SYMBOLS 20 Drain port 21 Lid receiving part 23 Grating lid 24 Outer frame part 25 Grating part 25a Vertical member 25b Horizontal member 26 Engagement rod 27 Engagement rod support material 28 Engagement rod insertion hole 30 Engagement doorway operation mechanism 31 Operation handle 32 rotation center shaft 32a head portion 32b shaft portion 33 cam 34 cam driven members 34a, 34b shaft portion 34c bottom side portion 35 base plate 36 guide member 37 support frame 40 cylinder 41 bottom plate 41a through hole 42 top plate 43 coil spring 50 handle insertion Hole 50a Locking notch 51 Handle engagement protrusion 52 Handle 52a Handle head 52b Shaft 53 Engagement groove

Claims (2)

A drain receiving opening opened on the road surface is provided with a lid receiving portion, a metal grating lid is detachably fitted in the lid receiving portion, and the grating lid is fitted into the lid receiving portion. The outer peripheral frame portion and a grating portion integrated into the outer peripheral frame portion, and a pair of engagement rods that enter and exit from the outer peripheral frame portion and the engagement rods are made to enter and exit the grating lid. An engagement rod entry / exit operation mechanism for
The engagement rod is supported so as to be operable only in the axial direction with respect to the grating lid, and both the engagement rods are arranged on the same straight line so that their base ends face each other.
The engagement rod entry / exit operation mechanism is between a pair of opposing proximal ends of the engagement rod, and a rotation center shaft that is turned by an operation handle, and a pair of cams fixed to the rotation center shaft And a pair of cam driven members connected to the respective engagement rods and reciprocated by the respective cams,
By projecting the engagement rod by the engagement rod entry / exit operation mechanism , the leading end is inserted into the engagement rod insertion hole provided in the lid receiving portion, and the grating lid is prevented from coming off. In the grating lid detachment prevention device for road drains,
The cam is a groove cam formed in an arc shape with one end close to the rotation center axis and the other end away from the rotation center axis on the base plate fixed to the rotation center axis. The cam follower is fitted in the groove cam, and the engagement plate is reciprocated in the axial direction together with the cam follower by reciprocatingly rotating the base plate.
The cam follower member has a shape obtained by bending a rod-shaped steel material into a substantially U shape, and one of a pair of parallel shaft portions constituting the U shape is a shorter shaft portion than the other. One of the short shaft portions is inserted into the groove cam, and the tip of the other long shaft portion is passed through and engaged with the end portion of the engaging lid at the center portion of the grating lid,
The cam follower is formed in a guide groove formed in a guide member having a bottom portion constituting the bottom of the U-shape arranged in parallel with the engagement rod and fixed below the bottom surface of the grating lid via a support frame. A grateing lid detachment prevention device for a road drain outlet , which is fitted into the inside and is capable of reciprocating in the direction of the guide groove . A cylinder provided with a key hole on one end face and a shaft insertion hole on the other end face is installed on the grating lid so that the handle can be inserted into the key hole from the surface of the grating lid, The rotation center shaft is installed in the cylinder so as to be able to reciprocate within the cylinder, and the rotation center shaft is urged by a spring toward the keyhole of the cylinder, and the tip of the rotation center shaft is It fits into the keyhole and cannot be rotated,
By inserting the handle into the keyhole while pushing the rotation center axis, the rotation center axis can be rotated.
2. The grating lid preventing device according to claim 1, wherein the handle can be extracted only at an angle at the time of insertion, and the engagement rod is operated in the engagement direction in conjunction with the operation in the return direction of the handle.

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