JP6609486B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device for a lid for an underground structure, for example.

  As this type of locking device, a technique described in Patent Document 1 below has been proposed. The locking device of Patent Literature 1 is arranged on the back surface side of the closing plate portion that can open and close the opening formed at the edge of the lid body, and is rotatable about the rotation center portion. Locking hook main body, locking protrusion that can be rotated together with the locking hook main body and locked to the locking protrusion formed on the receiving frame, and in the direction in which the locking protrusion locks to the locking protrusion from below A spring body that biases the locking rod main body and biases the closing plate portion in the direction of closing the opening portion is provided. The spring body is immediately behind the closing plate portion, and the locking rod main body and the closing plate portion are used as spring seats.

  In the locking device of Patent Document 1, when the operator pushes the closing plate portion in the direction of opening the opening portion (downward) against the elasticity of the spring body using a tool, the spring body contracts, and the tool is operated in this state ( Rotating operation), the closing plate part, the locking rod body, the locking projection, and the spring body rotate around the rotation center, and the locking projection extends from the lower side of the locking projection to the inside of the lid body in the radial direction. The lid body can be removed from the receiving frame.

Japanese Patent No. 3616920

  By the way, in this type of locking device, in the locked state in which the closing plate portion closes the opening, the locking protrusion is located below the locking protrusion. Therefore, in the locked state, it is difficult to position the locking rod main body above the locking protrusion. In particular, in the locking device of Patent Document 1, the spring body is disposed immediately behind the closing plate portion, and the locking rod body and the closing plate portion are used as spring seats. For this reason, the spring body must have a longer length.

  Then, this invention aims at provision of the locking device which can shorten the length of a spring body compared with the past.

  The present invention is a locking device for locking a lid main body to a receiving frame, and is provided on a back surface side of a closing plate portion capable of opening and closing an opening formed at an edge of the lid main body. A locking rod main body rotatable about the rotation center portion, a locking projection that rotates together with the locking rod main body and can be locked to a locking projection formed on the receiving frame, and the locking projection A spring body for urging the locking rod main body in a direction to be locked to the locking projection from below, and for urging the closing plate portion in a direction to close the opening, The main body includes a first main body portion that is disposed on the back surface side of the closing plate portion and has the rotation center portion, and a second main body portion that includes the locking protrusion, and the first main body portion is the second main body. A guide portion is provided to be movable toward and away from the portion in the expansion and contraction direction of the spring body. The first main body part and the second main body part are used as spring seats. It is characterized by.

  In the locking device of the present invention having the above configuration, when the operator pushes the closing plate portion in the direction of opening the opening portion against the elasticity of the spring body using a tool, the first main body portion moves to the second main body portion. The spring body is compressed by approaching and guided by the guide part, and by operating the tool in this state, the first main body part and the second main body part, and the spring body constituting the closing plate part, the locking rod main body are By rotating around the center of rotation, the locking projection is released from the lower side of the locking projection to the inside in the radial direction of the lid body, and the lid body can be removed from the receiving frame.

  In the locking device of the present invention, it is possible to adopt a configuration in which the second main body portion includes the rotation center portion, and the rotation center portion is supported by a support portion provided on the back surface of the lid body.

  In the locking device having the above-described configuration, the closing plate portion, the first main body portion and the second main body portion constituting the locking rod main body, and the spring body are provided in the second main body portion and rotate around the rotation center portion.

  In the locking device of the present invention, the guide portion is provided in the first main body portion and the second main body portion, and a hook-shaped guided body provided in either the first main body portion or the second main body portion. And the structure provided with the guide recessed part which is provided in the other of this 1st main-body part and the 2nd main-body part and guides the said to-be-guided body slidably can be employ | adopted.

  In the locking device having the above configuration, when the first main body portion is guided to the second main body portion by the guide portion, the guided body is guided to the guide concave portion.

  In the locking device of the present invention, it is possible to adopt a configuration in which the rotation center portion is arranged so as to be displaced toward the center side of the lid body as compared with the guide portion.

  According to the locking device having the above configuration, the spring body is disposed so as to be displaced toward the center side of the lid body with respect to the rotation center portion, and the guide portion is radially outward of the lid body relative to the rotation center portion By shifting the position of the spring body, it is possible to suppress the length of the spring body from being increased.

  In the locking device of the present invention, the spring body may be a coil spring, and the spring body may be arranged parallel to the guide direction of the guide portion.

  According to the locking device having the above configuration, when the first main body is guided toward the second main body, the spring body contracts in the axial direction.

  In the locking device of the present invention, the spring body is displaced between the center portion of the lid body with respect to the rotation center portion and is disposed between the first body portion and the second body portion. It is possible to shorten the length of the spring body as compared with the configuration in which the body is disposed immediately behind the closing plate portion.

FIG. 2 shows a first embodiment of the present invention, and is a plan view in which a locking device is locked by closing a central hole of a receiving frame with a lid body. It is sectional drawing in the radial direction center in FIG. It is an expanded sectional view of the locking device portion in FIG. It is a front view of the state which assembled | attached the 1st main-body part and the 2nd main-body part in the locking device. It is a side view of the same 1st main-body part. It is the same top view. It is the same front view. FIG. It is a side view of the 2nd main-body part in the locking device. It is the same top view. It is the same front view. FIG. It is sectional drawing showing the initial stage operation for making the locking device into an unlocked state. It is sectional drawing showing the unlocking state. It is side surface sectional drawing of the open state which opened the lid body with respect to the receiving frame. It is side surface sectional drawing made into a closed state from an open state. It is side surface sectional drawing of the state in which the latching protrusion follows the surrounding surface of the center hole of a receiving frame. It is a side view showing the locking state of the locking device showing 2nd embodiment of this invention. It is sectional drawing in the radial direction center of the locking state showing 3rd embodiment of this invention. It is sectional drawing showing the initial stage operation for making the locking device into an unlocked state. It is sectional drawing showing the unlocking state.

  Hereinafter, a locking device according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the locking device 1 according to the first embodiment includes a center hole 3 of a manhole receiving frame (hereinafter simply referred to as “receiving frame”) 2 embedded so as to be substantially flush with the road surface R. The lid body 4 that closes the door is for locking the receiving frame 2. The receiving frame 2 and the lid body 4 are formed by casting, and the lid body 4 is formed in a disc shape so that the center hole 3 can be closed. The lid body 4 is openable / closable and detachable from the receiving frame 2 via a hinge member 5.

  Reinforcing ribs 6 are integrally formed vertically and horizontally on the back surface of the lid body 4. A part of the edge of the lid body 4 is cut away to form an unlocking opening 7. A support piece 9 that protrudes downward at a position corresponding to the side of the unlocking opening 7 on the back surface of the lid body 4 and supports a rotation center portion 8 to be described later rotatably in a horizontal plane is integrally formed. Is formed. Since the hinge member 5, the reinforcing rib 6, and the support piece 9 have a known configuration, detailed description thereof is omitted. The support piece 9 corresponds to a support portion.

  The unlocking opening 7 is a notch having a longer direction (radial direction) from the edge of the lid body 4 toward the center. In the unlocking opening 7, the radially inner end surface 7 a is an inclined surface that approaches the center of the lid body 4 as it goes downward. The locking device 1 includes a closing plate portion 10 that can open and close the unlocking opening 7 and a locking rod main body 11 that can rotate around a rotation center portion 8.

  As shown in FIGS. 3 and 4, the closing plate portion 10 is formed in a shape corresponding to the unlocking opening 7. The closing plate portion 10 is provided on the first main body portion 12. In the following description of the configuration of the locking device 1, the closing plate 10 closes the unlocking opening 7, that is, the lid body 4 that locks the center hole 3 of the receiving frame 2 installed on the road surface R is locked. It is an explanation in the state.

  The locking rod main body 11 includes a first main body portion 12 and a second main body portion 13. As shown in FIGS. 5 to 8, the first main body portion 12 is integrally formed on the back surface side of the closing plate portion 10. The first main body 12 integrally includes a first radially outer portion 15, a first radially inner portion 16, and a restriction piece 17. A first radial inner portion 16 is formed shorter in the vertical direction than the first radial outer portion 15, and the first radial outer portion 15 and the first radial outer portion 15 are formed on the back surface 12 a of the first main body portion 12. A stepped surface 18 is formed between the radially inner portions 16.

  On the back surface 15a of the first radially outer portion 15, a guide recess 20 is formed in which a saddle-shaped guided body 19 described later is loosely fitted. The guide recess 20 is disposed at the center position in the width direction of the back surface 15a of the first radially outer portion 15, and is formed so that the vertical direction is the longitudinal direction. The guide recess 20 is formed in a quadrangular prism shape in cross section, and is formed along a direction orthogonal to the back surface 15a of the first radially outer portion 15 which is a horizontal plane. The upper end of the radially outer end surface 15b in the first radially outer portion 15 is formed on an inclined plane that approaches the radial center as it goes downward, and is radially inward from the radially outer end portion of the closing plate portion 10. The position is shifted.

  On the back surface 16a of the first radially inner portion 16, there is formed an upper support recess 22 that forms a spring seat with which an upper end of a coil spring 21 described later contacts. The upper support recess 22 is a cylindrical recess, and the upper surface thereof is an upper spring seat 22a. The upper spring seat 22a is formed in a circular plane. The back surface 16 a of the first radially inner portion 16 is disposed higher than the back surface 15 a of the first radially outer portion 15.

  The radially inner peripheral side surface 16b of the first radially inner portion 16 is formed as an arc surface. The radially inner peripheral side surface 16 b is located further radially inward with respect to the radially inner end face of the closing plate portion 10. In other words, the first radially inner portion 16 is formed to extend further radially inward on the back surface of the lid body 4 with respect to the closing plate portion 10, and a part of the first radially inner portion 16. Is formed extending radially inward with respect to the closing plate portion 10, and a part of the upper surface 16 c of the first radially inner portion 16 is in contact with the back surface of the lid body 4. As shown in FIG. 3, the center position of the upper spring seat 22 a is arranged so as to be displaced radially inward with respect to the unlocking opening 7.

  The restriction piece 17 restricts the upward movement range of the first main body portion 12 by abutting in a vertical direction with a stopper 23 described later provided on the second main body portion 13 side. Each restricting piece 17 is arranged on the side surface of the first main body 12 so as to span the first radially outer portion 15 and the first radially inner portion 16. The upper surface 17a of the restricting piece 17 is formed in a horizontal plane. The upper surface 17 a of the restricting piece 17 is positioned at a height between the back surface 15 a of the first radially outer portion 15 and the back surface 16 a of the first radially inner portion 16.

  Next, the second main body 13 will be described with reference to FIGS. 9 to 12. The second body portion 13 includes a second radially inner portion 25, a second radially outer portion 26, an arm 27, a rotation center portion 8, a guided body 19, and a locking projection 28. Prepare.

  The second radially inner portion 25 and the second radially outer portion 26 are formed in an integral plate shape in the radially inner and outer directions. The second radially inner portion 25 includes a lower support recess 29 that forms a spring seat with which the lower end of the coil spring 21 abuts.

  The lower support recess 29 is formed at the center in the width direction of the second radially inner portion 25. The lower support recess 29 is a cylindrical recess, and its lower surface is a lower spring seat 29a. The lower spring seat 29a is formed in a circular plane. The upper spring seat 22a and the lower spring seat 29a are positioned so as to face each other in the vertical direction.

  The second radially inner portion 25 includes projecting portions 30 that are integrally formed on both side portions so as to project sideways. The arm 27 is formed to extend upward from the radially outer end of each protrusion 30.

  The rotation center portion 8 is formed integrally with the upper end of each arm 27. The rotation center portion 8 is formed to protrude outward in the width direction of the arm 27. Each rotation center part 8 is formed in a truncated cone shape. As shown in FIG. 13, each rotation center portion 8 is inserted into the guide groove 9 a formed on the opposing surface of each support piece 9 from the radial center side outward in the radial direction. Each rotation center portion 8 is loosely fitted in each guide groove 9a so as to be rotatable. The guide groove 9a is formed so as to be inclined upward in the radial direction (inclined downward in the radial direction).

  On the facing surface 27a in the width direction of each arm 27, a stopper 23 that can be brought into contact with the regulating piece 17 in the vertical direction is formed so as to face. As shown in FIG. 11, the stopper 23 is disposed slightly below the central axis 8 a of the rotation center portion 8. Therefore, the position of the restriction piece 17 is restricted in the upward movement below the rotation center portion 8.

  The guided body 19 is disposed at the center in the width direction of the second radially outer portion 26 and is formed in a substantially quadrangular prism shape extending upward. The guided body 19 is formed to have a slightly smaller cross section toward the top. The guided body 19 is formed at a height that does not reach the rotation center portion 8. As shown in FIG. 9, the guided body 19 and the arm 27 are disposed so as to be displaced inward and outward in the radial direction, and the guided body 19 is positioned radially outward with respect to the arm 27. The guide concave portion 20 and the guided body 19 constitute a guide portion that allows the first main body portion 12 to be moved closer to and away from the second main body portion 13 in the expansion and contraction direction of the coil spring 21.

  Each rotation center part 8 is formed in a truncated cone shape. As shown in FIG. 10, each rotation center portion 8 is inserted into the guide groove 9 a formed on the opposing surface of each support piece 9 from the radial center side toward the radially outward side. Each rotation center portion 8 is loosely fitted in each guide groove 9a so as to be rotatable.

  The locking projection 28 is formed integrally with the radially outer portion of the second radially outer portion 26. The locking projection 28 is formed with the tip side gently upward. The locking projection 28 can be locked from below with a locking projection 31 formed on the receiving frame 2 by rotating together with the locking rod main body 11.

  As shown in FIG. 13, the coil body 21, which is a spring body, has an upper end abutted on the upper spring seat 22 a and a lower end abutted on the lower spring seat 29 a, so that the first body portion 12 and the second body portion 13 (first radial inner portion 16 and second radial inner portion 25). The coil spring 21 is disposed radially inward with respect to the guided body 19 so that the guided body 19 and the axis are substantially parallel to each other. The coil spring 21 is biased in a direction in which the first main body portion 12 and the second main body portion 13 are separated from each other. That is, when the rotation center portion 8 is fitted in the guide groove 9a and the downward movement of the second body portion 13 is suppressed, the coil spring 21 closes the closing plate in the direction of closing the unlocking opening 7. The opening 10 for unlocking is closed by the closing plate part 10 by urging the part 10. The coil spring 21 is protected by a cover 32.

  In the locking device 1 configured as described above, the state shown in FIG. 2 is a locked state (a closed state in the lid body). In the locked state, the closing plate portion 10 closes the unlocking opening 7 and the locking projection 28 is It is located below the locking protrusion 31. Further, as shown in FIG. 3, the rotation center portion 8 is located at the radially outer end of the guide groove 9 a of the support piece 9, the guided body 19 is along the vertical direction, and the upper end portion thereof is the guide recess 20. The guide recess 20 and the guided body 19 are inserted in the lower portion and are displaced radially outward with respect to the central axis 8a of the rotation center portion 8, and the coil spring 21 is maximum along the vertical direction. Is extended.

  In the locking device 1 of the present embodiment, the locking rod main body 11 is assembled with the first main body portion 12 and the second main body portion 13 as separate bodies, and the coil spring 21 is radially inward with respect to the unlocking opening 7. The upper end of the coil spring 21 is supported by the upper spring seat 22a of the first body portion 12, and the lower end is supported by the lower spring seat 29a of the second body portion 13. The length of the coil spring 21 is made shorter than that of the conventional locking device by disposing the coil spring 21 in the radially inward position with respect to the unlocking opening 7 as in this configuration. Can do.

  When the coil spring 21 extends, the first main body portion 12 moves upward, the closing plate portion 10 closes the unlocking opening 7, and the upper surface 16 c of the first radially inner portion 16 is the back surface of the lid main body 4. The upper movement of the first main body 12 is restricted. Even when the rotation center 8 is positioned at the radially outer end of the guide groove 9 a of the support piece 9, the center axis 8 a of the rotation center 8 is the radial center position of the unlocking opening 7. Is located radially inward.

  2 and 3, the procedure of releasing the locking projection 28 from the lower side of the locking projection 31 radially inward to unlock (unlocked) is shown in FIGS. 13 and 14. This will be described with reference to FIG. In FIG. 13, using the tip of a predetermined unlocking tool T that is generally used, the top surface of the closing plate 10 is pushed down against the elasticity of the coil spring 21 with the tip. If it does so, while the rotation center part 8 is latching in the guide groove 9a of the support piece 9, while a downward movement is restrict | limited, the coil spring 21 is compressed and the 1st main-body part 12 becomes a 2nd main-body part. Approach 13

  At this time, the columnar (guide-like) guided body 19 is guided so as to be inserted deeper into the guide recess 20, so that the first main body 12 is linear with respect to the second main body 13. Move and approach. Further, the upper surface 16 c of the first radially inner portion 16 is separated from the rear surface of the lid body 4. Since the coil spring 21 is disposed in parallel to the guided body 19, no force in the direction of rotating (folding) the coil spring 21 acts. For this reason, the 1st main-body part 12 approaches the 2nd main-body part 13 smoothly, and the pressing operation of the 1st main-body part 12 with the unlocking tool T is easy.

  The coil spring 21 is disposed so as to be displaced inward in the radial direction (center) side of the lid body 4 with respect to the rotation center portion 8, and the guided body 19 and the guide recess 20 which are guide portions are arranged at the rotation center. The coil spring 21 and the guide portion are arranged in parallel so as to be displaced toward the radially outer side of the lid body 4 with respect to the portion 8. For this reason, the first main body 12 is smoothly guided toward the second main body 13.

  Even when the rotation center 8 is located at the radially outer end of the guide groove 9 a of the support piece 9, the center axis 8 a of the rotation center 8 is in relation to the radial center position of the unlocking opening 7. Therefore, a part of the force that presses the first main body portion 12 downward rotates the locking rod main body 11 around the rotation center portion 8 (in this case, It works as a force that rotates counterclockwise in FIG. For this reason, the rotation center portion 8 moves slightly inward in the radial direction along the guide groove 9a, and the locking rod main body 11 rotates around the rotation center portion 8 so that the locking projection 28 is in the radial direction. Escape to the inside and unlock.

  After the first main body portion 12 is moved down to an appropriate position by the unlocking tool T, the pressing of the first main body portion 12 by the unlocking tool T is stopped and the unlocking tool T is rotated. Since the unlocking tool T to be used has a general configuration, when the unlocking tool T is rotated, as shown in FIG. Rotate. As a result, the locking projections 28 are greatly disengaged radially inward with respect to the locking projections 31 to enter the unlocked state.

  In the unlocked state, when the unlocking tool T is rotated, the overhanging portion T1 is locked to the back surface of the lid body 4, so that when the unlocking tool T is pulled up, it is shown in FIG. Thus, the lid body 4 can be opened with respect to the receiving frame 2 by lifting the lid member 4 around the hinge member 5 and opening it. When the lid body 4 is opened, the locking device 1 is in the same state as when the lid body 4 is closed.

  In order to change the lid body 4 from the open state to the closed state again, the lid body 4 is lowered around the hinge member 5 as shown in FIG. Then, the locking projection 28 first comes into contact with the upper end of the opening of the center hole 3 of the receiving frame 2 from above, and when the lid body 4 is further lowered, the tip of the locking projection 28 opens to the opening of the center hole 3 as shown in FIG. The coil spring 21 is not compressed because it is in contact with the peripheral surface and the closing plate portion 10 is not pressed, and the entire lock rod body 11 rotates counterclockwise around the rotation center portion 8 in the figure.

  In this case, the coil spring 21 is not compressed, but since the guided body 19 is loosely fitted in the guide recess 20, the coil spring 21 is bent by an amount corresponding to the gap between the guided body 19 and the guide recess 20. There are things to do. When the lid body 4 is further lowered, the locking projection 28 follows the opening peripheral surface of the center hole 3, and when the lid body 4 is further lowered, the locked state shown in FIG.

  Since this type of locking device is installed on the road surface R together with the receiving frame 2 and the lid body 4, sand and soil easily enter the receiving frame 2 through the unlocking opening 7. However, in the locking device 1 according to the present embodiment, even if the guide recess 20 is provided as the guide, the guide recess 20 is open downward, so that sand and soil do not enter the guide recess 20. , Can ensure the performance of the product in the long term.

  The present invention can be variously modified without departing from the gist thereof. In addition, the specific configuration of each part is not limited to the above embodiment. In the first embodiment, the guide recess 20 is formed in the first main body 12 and the guided body 19 is formed in the second main body 13 in the guide portion. However, as in the second embodiment shown in FIG. 18, the guide recess 20 can be formed in the second body portion 13 and the guided body 19 can be formed in the first body portion 12. Since other configurations are the same as those of the first embodiment, components having the same functions are denoted by the same reference numerals, and the description thereof will not be repeated.

  In the first embodiment and the second embodiment, in the guide portion, the guide recess 20 and the guided body 19 are formed in a direction along the vertical direction. However, as shown in the third embodiment in FIG. 19, the guide recess 20 and the guided body 19 can be formed to be inclined with respect to the vertical direction.

  In this case, the guide recess 20 and the guided body 19 are inclined upward in the radial direction. Further, the coil spring 21 is disposed in parallel to the guide portion. Further, the inclination is along the inclination of the peripheral surface of the center hole 3 of the receiving frame 2. Since other configurations are the same as those of the first embodiment, components having the same functions are denoted by the same reference numerals, and the description thereof will not be repeated. The spring used for the locking device 1 is not limited to a coil spring, and may be a leaf spring.

  In this configuration, when the first main body portion 12 is pushed down by the unlocking tool T, the first main body portion 12 moves downward along the inclination of the guide portion as shown in FIG. Then, by rotating the unlocking tool T, the locking rod main body 11 rotates around the rotation center portion 8, and the locking projection 28 escapes from the lower side of the locking projection 31 radially inward, and the lid The main body 4 can be opened. In the locking device 1 of the third embodiment, when the first main body portion 12 is pushed down with the unlocking tool T, the first main body portion 12 moves down along the inclination of the guide portion. Easy.

  DESCRIPTION OF SYMBOLS 1 ... Locking device, 2 ... Receiving frame, 3 ... Center hole, 4 ... Cover body, 7 ... Unlocking opening, 7a ... Radial inner end surface, 8 ... Turning center part, 8a ... Center axis, 9a ... Guide groove DESCRIPTION OF SYMBOLS 10 ... Closure board part, 11 ... Locking rod main body, 12 ... 1st main body part, 13 ... 2nd main body part, 15 ... 1st radial direction outer part, 16 ... 1st radial direction inner part, 17 ... Regulation | regulation Piece 19: Guided body 20 ... Guide recess 21: Coil spring 22 On support recess 22a ... Upper spring seat 25 ... Second radial inner part 26 ... Second radial outer part 28 ... Locking projection, 29 ... Lower support recess, 29a ... Lower spring seat, 31 ... Locking projection, R ... Road surface

Claims (5)

A locking device for locking the lid body to the receiving frame,
A closing plate that enables opening and closing of the opening formed at the edge of the lid body;
A locking rod main body, which is disposed on the back side of the closing plate portion and is rotatable around a rotation center portion;
A locking projection that can be rotated with the locking rod main body and can be locked to a locking projection formed on the receiving frame;
A spring body for urging the locking rod main body in a direction in which the locking protrusion is locked to the locking protrusion from below and for urging the closing plate portion in a direction to close the opening. Prepared,
The locking rod main body includes a first main body portion that is disposed on the back surface side of the closing plate portion and has the rotation center portion, and a second main body portion that includes the locking protrusion,
A guide portion is provided that allows the first main body portion to approach and separate in the expansion and contraction direction of the spring body with respect to the second main body portion,
The spring body is disposed between the first main body portion and the second main body portion by being displaced from the rotation center portion toward the center side of the lid main body,
A locking device, wherein the first main body and the second main body are spring seats.   The locking device according to claim 1, wherein the second main body portion includes the rotation center portion, and the rotation center portion is supported by a support portion provided on a back surface of the lid body.   The guide part is provided in the first main body part and the second main body part, and a hook-shaped guided body provided in either the first main body part or the second main body part; and the first main body part The locking device according to claim 1, further comprising a guide recess provided on the other of the second main body portions and slidably guiding the guided body.   The locking device according to any one of claims 1 to 3, wherein the rotation center portion is arranged to be displaced toward a center side of the lid main body as compared with the guide portion.   The locking device according to any one of claims 1 to 4, wherein the spring body is a coil spring, and the spring body is disposed in parallel with a guide direction in the guide portion.

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