JP6100338B1 - Cover opening / closing mechanism for underfloor inspection port or underfloor storage - Google Patents

Abstract

An underfloor inspection port that can be closed smoothly and silently without steps and a lid opening / closing mechanism for an underfloor storage are provided. An open / close lid C pivotally attached to an outer frame F of an underfloor inspection port, both side support stays S, a load support spring 37, and an idler roller 31 pivotally supported on the tip of the support stay S. And a lid opening / closing mechanism for the underfloor inspection opening provided in parallel with the traveling guide rails G arranged in a fixed state to the outer frame F, the second fulcrum shaft P2 serving as a winding core of the load support spring 37 is placed on the side. As the swinging damper D that can rotate integrally with the support stay S, a braking torque is generated from the damper D, and the opening / closing lid C increases as it advances in the direction of closing the lid with the first fulcrum shaft P1 as a center. The braking torque of the oscillating damper D, which becomes relatively weak with respect to the load, is complemented by the tension of the load support spring 37, which becomes relatively strong, and the opening / closing lid is rotated almost uniformly until it is fully closed. I will lay down on the ground It was set to. [Selection] Figure 1

Description

  The present invention relates to an underfloor inspection opening that opens on the floor of a building and a lid opening / closing mechanism for an underfloor storage.

  The applicant of the present invention has already acquired Japanese Patent No. 5377687 for a lid opening / closing mechanism for an underfloor inspection port or an underfloor storage, and has carried out its implementation business.

  As described in the patent publication (Patent Document 1), this is a load support spring (kick spring / vine coil spring) wound around the second fulcrum shaft (P2) of the side support stay (13) in the opening / closing lid (C) ( 15) and an elastic tension stopper (compression coil spring) (27) for closing the lid attached to the slide guide rail (G), and the opening and closing lid (C) is turned down from the fully opened state of FIG. In the process for operation, the second fulcrum axis (P2) is located at a thought point (YY) on a straight line connecting the first fulcrum axis (P1) and the third fulcrum axis (P3) as shown in FIG. When the full stop is closed as shown in FIG. 7, the tension stopper (27) is compressed to the shortest, and the second fulcrum shaft (P2) subsequently falls over the thought point (Y-Y). The fully closed state of the lid (C) It is adapted to automatically locked by restoring tension par (27).

Japanese Patent No. 5377687

  However, in the configuration disclosed in Patent Document 1, the opening / closing lid (C) rotates relatively quickly until the second fulcrum shaft (P2) reaches the thought point (Y-Y). When it reaches (Y-Y), it will stop once, and the open / close lid (C) needs to be laid down downward, so that it can be fully closed smoothly and steplessly at an almost uniform speed as a whole. In addition to being troublesome and inconvenient in the operation of closing the lid, right and left sides of the opening / closing lid (C) and the inspection port (just before reaching the thought point (YY) as shown in FIG. 6) There is a risk that the operator's hand or a sleeve of clothes will be packed between the opening edges of O).

  Further, it is difficult to keep (adjust) the load (mass) of the opening / closing lid (C), the tension of the load supporting spring (15), and the tension of the stretchable tension stopper (27) in the overall equilibrium state. Business.

  Furthermore, the installation of the tension stopper (27) is omitted, and the opening / closing lid (C) is quietly, smoothly and stably fully protected against the load of the opening / closing lid (C) only by the tension of the load support spring (15). Closing is impossible even without considering that the spring pressure (tension) becomes weak enough to be used and that the load of the opening / closing lid (C) changes according to the inclination angle (opening). It is.

  In this regard, instead of using the load support spring (15), braking torque (in the closing direction of the opening / closing lid) only in one direction as seen in JP2014-224582A, JP2009-92086A, etc. It is conceivable to use a fixed swing damper that generates a load, but with only the swing damper, the load on the opening / closing lid (C) changes according to the inclination angle (opening), and the fully closed direction The braking torque of the rocking damper is constant compared to when the rocking damper becomes large, so if you use a rocking damper with a strong braking torque, you cannot obtain the fully closed state of the open / close lid. If a swing damper with a weak braking torque is used, the open / close lid will fall down vigorously at high speed, making an impact sound and extremely dangerous.

  Furthermore, since the swing damper is necessarily provided with a margin angle (so-called play angle / clearance) of about 20 to 30 degrees due to its structure, the opening / closing lid is raised from the fully closed state to the fully open state. There is a risk that the open / close lid may drop immediately if the operator is released during the process of lifting up.

  The present invention aims to drastically solve such problems, and in order to achieve the object, in claim 1, to the outer frame in the form of a frame that divides the opening of the underfloor inspection port or the underfloor storage body, An open / close lid pivotably mounted in an undulating manner via a horizontal first fulcrum shaft;

A pair of left and right side support stay mounting brackets fixed to the middle part of the opening / closing lid from the back side;

A pair of left and right side support stays pivotally attached to the mounting bracket via respective horizontal second fulcrum shafts;

A pair of left and right load support springs respectively wound around the second fulcrum shaft of the side support stay to urge and urge the opening / closing lid in a pivoting direction that always raises and opens the lid;

A pair of left and right idler rollers each pivotally supported on the tip of the side support stay;

For an underfloor inspection port or underfloor storage provided with a pair of left and right parallel traveling guide rails arranged in a fixed state to the outer frame or the floor structure in order to move the idler roller in the front-rear direction. In the lid opening and closing mechanism,

The second fulcrum shaft that becomes the winding core of the load supporting spring is a swinging damper that can rotate integrally with the side support stay of the opening / closing lid, and a braking torque in the closing direction is generated from the swinging damper,

On the contrary, the braking torque of the oscillating damper, which becomes relatively weak with the load of the opening / closing lid, becomes relatively stronger as the rotation proceeds in the direction of closing the lid around the first fulcrum shaft. Complemented by the tension of the load support spring,

While the above-mentioned opening / closing lid is made to lie down under a substantially uniform rotation speed as a whole up to the fully closed state,

It is characterized in that it is determined so that the tension of the load supporting spring can be adjusted.

Further, in claim 2, the center portion of the mounting disk formed on the base end portion of the side support stay is connected to the output shaft portion of the horizontal swing damper pivoted on the pair of left and right side support stay mounting brackets. While inserting and fitting so that each can rotate integrally,

While engraving teeth on the circumferential surface of the mounting disk for a certain rotation angle range,

During the process of raising the open / close lid from the fully closed state to the fully open state, the locking claw that engages with the teeth only when the open / close cover is released is always engaged with the mounting bracket. It is characterized in that it is pivotally attached to a state in which it is pressed in the direction to stop.

According to a third aspect of the present invention, the plurality of screw holes for adjusting the strength of the tension in the load support spring are distributed along the arc motion locus of the arc-shaped pin receiving plate piece formed in the middle portion of the side support stay. ,

While locking the relatively long one end of the load supporting spring to a horizontal spring receiving pin that is alternatively screwed into the screw hole of the pin receiving plate piece,

That the load support spring is relatively short and the other end is locked to the horizontal spring receiving pin that is fixed and mounted on the side support stay mounting bracket so that the swing damper and the axis are parallel to each other. Features.

Further, according to the fourth aspect of the present invention, the central portion of the mounting disk formed on the base end portion of the side support stay is integrally rotated to the output shaft portion of the horizontal swing damper pivoted on the side support stay mounting bracket. So that it can move,

Along with the arc motion trajectory of the mounting disk, a plurality of lock pin receiving holes are distributed and distributed,

Mounting the side support stay as a long rotating lock pin with a spring receiving concave groove cut out at the neck of the horizontal spring receiving pin for locking the other end of the load supporting spring that is relatively short It is characterized in that it is inserted into the bracket so that it can be inserted / removed / retracted in an elastically biased state in a direction in which its tip is always inserted and locked to the lock pin receiving hole of the mounting disk.

According to the structure of claim 1, it is possible to completely solve the problems of the prior art described at the beginning, and for an underfloor inspection port or underfloor storage that is excellent in safety, quietness, and convenience in use. The lid opening / closing mechanism can be obtained.

That is, the load of the opening / closing lid that undulates around the first fulcrum shaft varies depending on the rotation angle (inclination angle / opening degree), and increases as it proceeds in the direction of the closing lid. However, since the braking torque (load) generated from the swing damper is constant, the swing damper alone cannot cope with the load in the closing direction of the opening / closing lid, and the braking torque increases as it advances in the closing direction. Will be weakened relatively.

In this regard, in the above-described configuration of the first aspect, the load supporting spring (kick spring / bend coil coil spring) of the opening / closing lid is wound around the swing damper, and this is in the direction in which the opening / closing lid is always raised and opened. Due to the pressing force, the weakening of the braking torque can be compensated by the spring pressure (tension) that becomes relatively stronger as the opening / closing lid advances in the closing direction, and the load supporting spring and the above-mentioned Combined with the swing damper, the load on the opening / closing lid is leveled almost uniformly at all times regardless of the change in its rotation angle, and the opening / closing lid is kept at a substantially constant rotation speed until it is fully closed. It can be smoothly stepped down without any steps.

In particular, if the configuration of claim 2 is adopted, the open / close lid is raised from the fully closed state to the fully open state based on the fact that the swing damper has a structural margin angle (so-called play angle / clearance). In the middle of the operation, there is a risk that the operator may fall down immediately due to accidental release of the operator, there is an effect that can be prevented by the locking action of the teeth that work only at that time and the locking claw, Helps improve safety.

If the structure of claim 3 is adopted, a relatively long separated one end portion of the load supporting spring wound around the swing damper as a winding core is inward from the middle portion of the side support stay which is a movable member. While locking to the protruding spring receiving pin, the other end of the load support spring is also cut off to the spring bracket pin fixedly mounted on the mounting bracket side of the fixing member. Combined with the fact that the swing damper and the side support stay of the opening / closing lid are assembled to the bracket so as to be able to rotate integrally, it is possible to achieve a remarkably reasonable fit.

In addition, in this case, the spring support pin on the side support stay, which is the movable member, has a plurality of screw holes that are distributed along the arc motion trajectory of the arc-shaped pin receiving plate piece that forms the middle part of the side support stay. However, since it is alternatively installed by screwing, the tension of the load supporting spring can be adjusted by changing the screwing.

Furthermore, if the structure of claim 4 is adopted, the spring receiving pin on the mounting bracket side, which is the fixing member, is used as a long rotating lock pin in which a special spring receiving concave groove is cut out at the neck. By defining the tip of the dynamic lock pin so that it can be inserted and locked by itself from the mounting bracket to the lock pin receiving hole on the side support stay side, the load support spring may be damaged during use. Even if one end of the long separation part is detached from the spring support pin on the side support stay side which is a movable member, the swinging damper and the opening / closing lid can be securely locked with the side support stay. , Improve safety.

It is a side view which shows the full open state of the opening-and-closing lid applied and implemented to the underfloor inspection port of this invention. It is a front view of FIG. It is a partial expanded sectional view which shows the engagement state of the idler roller with respect to a travel guide rail. FIG. 2 is a side view of a midway process of overturning the opening / closing lid from FIG. 1. FIG. 5 is a side view showing a fully closed state of the opening / closing lid following FIG. 4. It is an enlarged side view which extracts and shows the attachment part of an opening-and-closing lid and its side support stay. FIG. 7 is a front view of FIG. 6. FIG. 7 is a plan view of FIG. 6. It is an enlarged side view which extracts and shows a side support stay. It is an expanded sectional view which shows the generation | occurrence | production action state of the braking torque in a rocking damper. FIG. 6 is an enlarged cross-sectional view showing a non-generating action state of braking torque in the swing damper. It is a side view which extracts and shows the traveling guide rail of an idle roller. FIG. 13 is a plan view of FIG. 12. FIG. 2 is a partially enlarged side view of FIG. 1. FIG. 5 is a partially enlarged side view of FIG. 4. 6 is a partially enlarged side view of FIG. 5. It is an enlarged side view which shows the latching state of the latching claw with respect to the tooth in the middle process which raises an opening-and-closing lid | cover from FIG. It is an enlarged side view corresponding to FIG. 6 which shows the insertion locking state of the rotation lock pin with respect to the side support stay of an opening-and-closing lid. FIG. 19 is a cross-sectional view taken along line 19-19 in FIG. 18. It is a side view corresponding to FIG. 1 which shows the full open state of the opening-and-closing lid applied and implemented to the underfloor storage of this invention. FIG. 21 is a front view of FIG. 20 and corresponds to FIG. 2. It is an expanded sectional view which shows the integral molded product of an outer frame and a travel guide rail in an attachment use state.

Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 19 show an embodiment of the present invention applied to an opening / closing lid of an underfloor inspection port, and (F) is a floor plate (1). This is an outer frame that is assembled and integrated into a frame shape corresponding to the rectangular notch opening (inspection port) (O), and has a fixed depth of the standing wall (2), and is stretched inward and outward from its upper end. A decorative top flange (3) to be put out, and a lid receiving base flange (4) projecting inward from the lower end of the surrounding wall (2), the top flange (3) of the floor plate (1) A separate support fitting (not shown) in which the surrounding wall (2) is fastened directly to the floor plate (1) or to the base flange (4) under the locked state in which the inspection port (O) is edged and covered. ) And are fixedly attached to the floor structure material (joist) (5). The fixing screws for the outer frame (F) with respect to the floor plate (1) and the floor structure member (5) are not shown.

(C) is an open / close lid having a size and a flat shape that can be fitted inside the outer frame (F). The plywood (6) has a constant thickness and a peripheral portion thereof via a tapping screw (not shown). A cover frame (inner frame) (7) which is integrated with the cover, and a rectangular side (rear side) of the cover frame (7) is surrounded by the plurality of hinges (8) to surround the outer frame (F). It is pivotally attached to the standing wall (2) from the inside.

As a result, the opening / closing lid (C) can be pivoted as shown in FIGS. 1 to 5 about the horizontal first fulcrum shaft (P1) of the hinge (8). (9) is a semi-circular rotating handle pivoted in a sinked state at a position offset to the front side of the opening / closing lid (C), and can be opened and closed by raising it.

In that case, in the illustrated embodiment, the lid frame (7) of the opening / closing lid (C) is integrated into a rectangular frame in plan view by using a separate corner connecting piece (10). The use of the synthetic resin corner connecting piece (10) is omitted, and the lid frame (7) is assembled and integrated into a similar frame shape by abutting at about 45 degrees between its adjacent ends. good.

(B) is a pair of left and right side support stay mounting brackets, each assembled from a pair of facing angle steel plates (11) into an overall channel groove shape (gate shape) as shown in FIGS. It is integrated. That is, the flat seat plate pieces (11a) of the angle-shaped steel plates (11) in each mounting bracket (B) are superposed and fixed via a plurality of countersunk screws (12).

Then, the seat plate piece (11a) of each mounting bracket (B) is attached from the back side to the middle part of the left and right side sides of the open / close lid (C) by using a plurality of separate countersunk screws (13), adhesives, or the like. On the other hand, in the substantially central part of the parallel upright plate pieces (11b) of the angle-shaped steel plate (11) which protrudes backward from the open / close lid (C) under the attached state, A swing damper (D) serving as a horizontal second fulcrum shaft (P2) parallel to the first fulcrum shaft (P1) is mounted in a transverse state.

The swing damper (D) is a rotary damper that uses a braking torque generated by oil pressure (viscosity resistance). As illustrated in FIGS. 10 and 11, the rotating shaft (14) has a working chamber (15). ), The valve body (16) receives the pressure of the oil and comes into contact with the closing surface (17) to prevent the oil from flowing, thereby generating a braking torque and the same rotation. When the shaft (14) is rotated to the other (R) of the working chamber (15), the valve body (16) is separated from the closing surface (17) to allow the oil to flow so that no braking torque is generated. Therefore, the rotation direction (A) for generating the braking torque is the closing direction (the direction in which the opening / closing lid (C) will be described later), and the rotation direction (R) for not generating the braking torque. But also open / close lid (C) Use attachment relationship condition to be directed (raised up direction).

10 and 11, the reference numeral (18) is a case of the swing damper (D), (19) is a pair of partitioning ridges projecting inwardly from the case (18), and (14a) is the rotating shaft ( Reference numeral 14) denotes an output shaft portion (movable end), and (14b) denotes a fixed end of the swing damper (D) with respect to the upright plate piece (11b) of the mounting bracket (B).

(S) is a pair of left and right side support stays, made of an elongated steel plate having a constant band width and a working length (L) as shown in FIG. 9, and along the longitudinal direction of the opening / closing lid (C). Although extending, the base end portion (rear end portion) is shaped as a large attachment disc (20), and the center portion of the attachment disc (20) is the above-mentioned rocking as shown in FIGS. The rotary shaft (14) of the dynamic damper (D) is inserted and fitted into an output shaft portion (14a) protruding from the upright plate piece (11b) of the mounting bracket (B) so as to be able to rotate together. A shaft retaining ring for keeping the mounting disk (20) in a retaining state is not shown.

However, the rocking damper (D) is provided with a certain margin angle (so-called play angle / clearance) (about 30 degrees in the illustrated example) (α), regardless of whether braking torque is generated or not. The rotation shaft (14) is idled in both the clockwise direction and the counterclockwise direction only by the margin angle (α), and when reaching a large angle exceeding this, the rotation shaft (14) and the above-mentioned The side support stay (S) is integrally rotated (rotated) in both the clockwise direction and the counterclockwise direction.

For this purpose, the output shaft portion (14a) of the rotating shaft (14) is shaped as a substantially elliptical protrusion having a parallel flat surface as shown in FIGS. The bearing port (21) on the side of the support stay (S) is cut out as a special contour shape having the margin angle (α) as shown in FIG.

More specifically, when the opening / closing lid (C) is lowered from the fully opened state of FIG. 1 to the closing direction (A) by the margin angle (α) as shown in FIG. The rotating shaft (14) is idled and no braking torque is generated. After the margin angle (α) is passed, the opening and closing cover (C) is fully closed in FIG. The rotating shaft (14) of D) rotates together with the side support stay (S) to generate a braking torque for the opening / closing lid (C). This will be described later in detail as an explanation of the lid opening / closing action.

Even in the turning action process in which the opening / closing lid (C) is raised from the fully closed state to the opening direction (R), after the initial rotation of the rotation shaft (14) and the margin angle (α) have elapsed. The rotating shaft (14) and the side support stay (S) are integrally rotated (rotated), but the swing damper (D) is unidirectional and rotates in the opening direction (R). Since no braking torque is generated when the operation is performed, further explanation is omitted.

(22) is a tooth engraved by a certain rotation angle range (β) as shown in FIG. 9 on the circumferential surface of the mounting disk (20) in the side support stay (S), and (23) A locking claw that forms a ratchet mechanism in combination with the teeth (22) of the mounting disk (20), and is screwed onto the upright plate piece (11b) of the mounting bracket (B) as shown in FIGS. It is pivotally attached by a fastener (24).

In addition, a tension coil spring (25) is connected between the latching claw (23) and the upright plate piece (11b), whereby the latching claw (23) is attached to the mounting disk ( 20) is always pressed and biased in a direction to be locked to the teeth (22).

Then, the engraved rotation angle range (β) of the teeth (22) is a constant rotation angle range from the fully open state to the fully closed state of the open / close lid (C) as shown in FIG. When the opening / closing lid (C) is in the fully open state and the fully closed state, the locking claw (23) is rotated as described above. In other words, the angle range (β) is set so as to face an external position deviated from both ends and not be locked to the teeth (22) of the mounting disk (20) in the side support stay (S).

Further, (26) is a short turning distance (r1) that does not reach the circumferential surface from the center of the mounting disk (20) in the side support stay (S) as shown in FIG. On the circular motion trajectory (X1-X1), the opening / closing lid (C) has a constant rotation angle range (about 105 degrees in the example) (γ) from the fully open state to the fully closed state at regular intervals. A plurality of (in the illustrated example, a total of six) lock pin receiving holes that are formed in a scattered distribution state. The lock pin receiving holes are preferably formed in an elliptical shape so as to easily receive lock pins described later.

Similarly, (27) is a constant long distance that does not overlap with the upright plate piece (11b) of the mounting bracket (B) from the center of the mounting disk (20) in the side support stay (S) as shown in FIG. It is a pin receiving plate piece that is formed in an arc shape with a turning radius (r2) of the side support stay (S) and that projects in the middle of the side support stay (S) toward the base end (rear end). On the arc motion locus (X2-X2) maintaining the radius (r2), a plurality of screw holes (28) for adjusting the tension of the load support spring described later (a total of seven screw holes (28)) are distributed. . The tension (spring pressure) of the load supporting spring (kick spring / weir coil spring) is adjusted in strength by screwing the spring receiving pin (29) into the screw hole (28) selected from the plurality so as to be freely inserted and removed. Be able to.

As shown in FIGS. 1 to 3, a horizontal roller support shaft (30) is integrally projected outward from the front end portion (front end portion) of the side support stay (S). Roller) (31) is fitted. The idle roller (31) is made of a hard synthetic resin (preferably, trade name: Duracon) and rolls while engaging with a travel guide rail described later.

(G) is a pair of left and right parallel travel guide rails extending in the front-rear direction at a position directly below the outer frame (F), and the lip (32) as shown in FIGS. An aluminum material extruded into a channel groove shape with a channel, and a channel groove steel material with a lip (32), and a back wall surface (33) serving as the bottom of the groove is formed by a plurality of countersunk screws (34), (Jewel) It is attached and fixed to (5). As a result, the front faces are in an arrayed state in which they open toward the inside (laterally) of the inspection port (O).

And the idler roller (31) pivotally supported by the front end portion (front end portion) of the side support stay (S) engages with the lip (32) of the travel guide rail (G) in the front-rear direction. It comes to roll.

That is, when the lid (C) is closed in the lying down direction (A) about the first fulcrum axis (P1), it follows the same lying down direction about the second fulcrum axis (P2). The idler roller (31) rolls the traveling guide rail (G) forward through FIGS. 1 to 4 and FIG. 5 through the rotating side support stay (S).

On the other hand, when the opening / closing lid (C) is also opened with the first fulcrum shaft (P1) as the center and is rotated in the raising direction (R), the opening direction is also the same with the second fulcrum shaft (P2) as the center. The idler roller (31), on the other hand, rolls the traveling guide rail (G) rearward as shown in FIGS.

(35) is a stopper that closes at least the rear end of the opening of the traveling guide rail (G), and is made of an angle-shaped steel plate, and the seat plate piece (35a) is the back wall surface of the traveling guide rail (G) ( 33) and fixed with a plurality of countersunk screws (36) as shown in FIGS. 12 and 13, and the free-standing roller (31) is received by the remaining upright plate piece (35b) so as not to be removed. ing.

Further, (37) is a horizontal swing damper (D) pivoted on the side support stay mounting bracket (B), so to speak, a load supporting spring (kick spring / 6 to 8, one end portion (37a) projecting relatively long from the circumferential surface of the swing damper (D) is an arc shape in the side support stay (S). In addition to being locked to a spring receiving pin (29) protruding inward from a screw hole (28) of the pin receiving plate piece (27), the pin receiving plate piece (27) protrudes relatively short from the circumferential surface of the swing damper (D). The end portion (37b) is locked to a horizontal rotation lock pin (K) as described below, so that the opening / closing lid (C) always rises (rotation direction) (R) The oppression is energized.

As is clear from FIGS. 6 to 8 and FIGS. 18 and 19, the rotation lock pin (K) is connected to the parallel upright plate piece (11b) of the side support stay mounting bracket (B) facing the swing damper (D ) And the axis are parallel to each other, and the side support stay (S) mounting disk (S) extends from the inner standing plate piece (11b) through the outer standing plate piece (11b). 20) is inserted into the lock pin receiving hole (26) having an opening distribution so as to be freely inserted and removed (advanced and retracted).

That is, the inner standing plate piece (11b) of the mounting bracket (B) has a large-diameter pin insertion hole (38), and the outer standing plate piece (11b) also has a small-diameter pin insertion hole (39). The rotation lock pin (K) is formed to correspond to each other, the relatively thick head portion of the rotation lock pin (K) is formed by the large diameter pin insertion hole (38), and the relatively thin tip portion is also formed of the small diameter pin. The bearings are respectively received by the insertion holes (39).

Reference numeral (40) denotes a bearing plate piece for supporting a part of the rotation lock pin (K) that is offset from the inner standing plate piece (11b), and a flat seat of the side support stay mounting bracket (B). It protrudes integrally from the plate piece (11a) in the same direction (backward) as the upright plate piece (11b).

In addition, the neck where the rotation lock pin (K) faces (intervenes) between the inner standing plate piece (11b) and the bearing plate piece (40) in the mounting bracket (B), The spring receiving concave circumferential groove (41) as shown in FIG. 19 is cut out, and the load supporting spring (37) is cut off with a relatively short other end (37b) of the spring receiving concave circumferential groove (41). By being locked inward, the rotation lock pin (K) is held in a retracted state in which the tip end portion has come out of the lock pin receiving hole (26) on the side support stay (S) side.

In addition, between the neck portion provided with the spring receiving concave circumferential groove (41) and the relatively thin tip portion is shaped as an intermediate portion having the same thickness as the relatively thick head portion. Is wound with a compression coil spring (42) for pressing and urging the rotation lock pin (K) in the direction (outward) (Z) to be always inserted into the lock pin receiving hole (26) on the side support stay (S) side. ing. (43) is a spring receiving washer fitted in the middle part of the rotation lock pin (K), and faces the bearing plate piece (40). A shaft retaining ring for positioning and adjusting the spring receiving washer (43) is not shown.

The load support spring (37) is broken during use over time, or one end (37a) of the separation is detached from the spring support pin (29) on the side support stay (S) side. In this case, as shown in FIGS. 18 and 19, the other end portion (37b) of the load supporting spring (37) is in a free state, and the spring receiving concave portion on the rotating lock pin (K) side. Since the rotary lock pin (K) receiving the pressing biasing force of the compression coil spring (42) is separated from the groove (41) so as to be lifted, it receives the lock pin on the side support stay (S) side from the tip. The side support stays (S) are locked so as not to rotate.

However, in the illustrated embodiment, the load support spring (37) has a relatively short cut-off other end (37b) and is inserted into the lock pin receiving hole (26) on the side support stay (S) side so as to be freely inserted and removed. The long support lock pin (K) is received at the neck, but a simple short spring support pin (not shown) instead of the rotation lock pin (K) is attached to the side support stay mounting bracket (B). The mounting bracket as a fixing member is fixedly mounted between the inside and outside of the upright plate pieces (11b) facing each other and between the upright plate pieces (11b) and the bearing plate pieces (40) inside thereof. The load support spring (37) is separated from the other end (37b) by the spring support pin on the (B) side, and the spring support pin (29) on the side support stay (S) side which is a movable member. In the same manner as shown embodiment, it may be locked detach one end of the load-bearing spring (37) and (37a).

The lid opening / closing action of the above embodiment according to the present invention will be described. FIGS. 1 and 2 show the fully opened state of the opening / closing lid (C), and the opening / closing lid (C) is centered on the first fulcrum shaft (P1). It is in a state where it is raised from the plane of the floor board (1) by a certain rotation angle (opening) (γ) (about 105 degrees in the example).

In that case, the idler roller (31) on the side support stay (S) raised up around the second fulcrum shaft (P2) following the open / close lid (C) is connected to the travel guide rail (G ) Side stopper (35) and is prevented from being derailed backward, so that the fully open state of the opening / closing lid (C) is stably maintained.

Next, FIG. 4 shows the allowance of the swing damper (D) from the fully opened state of FIGS. 1 and 2 to the closing direction (A) against the urging force of the load support spring (37). As a halfway process in which the angle (play angle) (α) (about 30 degrees in the example) is lying down, it is still open by a certain rotation angle (θ) (about 75 degrees in the example) (however, However, in the initial stage of falling down in the closing direction (A) by the margin angle (α) of the swing damper (D), it is shown in FIG. 14 and FIG. As suggested by the comparison, the rotating shaft (14) of the swing damper (D) slips and does not generate a braking torque. Therefore, only the tension of the load support spring (37) during that time is the opening / closing lid ( C).

Then, when the lid (C) is continuously laid down from the midway process of FIG. 4 to the fully closed state of FIG. 5, as indicated by the comparison between FIG. 15 and FIG. The rotating shaft (14) and the side support stay (S) of (D) rotate integrally (rotate), and the braking torque generated from the swing damper (D) acts on the opening / closing lid (C). .

In that case, the open / close lid (C) gradually moves from the tilted posture at the constant turning angle (θ) in the middle of the process to the fully closed state of the horizontal posture where the turning angle (opening) is zero. As the load changes, the load also changes and gradually increases. However, since the braking torque of the swing damper (D) is constant, the opening / closing lid (C) is rotated to the fully closed state. As a result, the braking torque of the swing damper (D) that opposes the load of the opening / closing lid (C) becomes relatively weak.

In this respect, in the above-described embodiment of the present invention, the load supporting spring (37) wound around the swing damper (D) moves in the rotation direction (opening direction) (R) that always raises the opening / closing lid (C). The spring pressure (tension) is relatively strong as the opening / closing lid (C) is rotated to the fully closed state, so that the spring damper (D) works as a result. By the cooperative action of the load support spring (37) and the swing damper (D), the load of the opening / closing lid (C) can be said regardless of the change in the inclination angle (opening). The leveling is always made almost constant, and the opening / closing lid (C) can be slowly laid down from the fully open state of FIG. 1 to the fully closed state of FIG. 5 at a uniform rotational speed as a whole. ing.

In the process of laying down the opening / closing lid (C) from the fully opened state of FIG. 1 to the fully closed state of FIG. 5, the side support stay (S) receives the load of the opening / closing lid (C). The locking claw (23) on the side of the mounting bracket (B) floats from the teeth (22) carved on the mounting disk (20) of the side support stay (S), as suggested in FIG. Will be retained and will not lock onto its teeth (22).

Conversely, from the fully closed state of the open / close lid (C) as shown in FIG. 5, the fully open state as shown in FIG. 1 is obtained by raising the open / close lid (C) by holding the rotating handle (9). However, in this process, since the tension of the load supporting spring (37) is acting, the opening / closing lid (C) can be lifted up easily, and the locking claw (23 on the mounting bracket (B) side) ) Floats from the teeth (22) on the side support stay (S) side and does not engage with the teeth (22), so that the opening / closing lid (C) smoothly rotates in the opening direction (R). .

In the middle of raising in the lid opening direction (R), if the operator releases the hand, the teeth (20) engraved on the mounting disc (20) of the side support stay (S) 22) and the locking claw (23) on the mounting bracket (B) side are locked as shown in FIG. 17, and the state is strengthened by receiving the load of the opening / closing lid (C). There is no possibility that the open / close lid (C) will drop suddenly to the fully closed state, generate an impact sound, or injure the operating hand.

The opening / closing lid (C) was wound around the swing damper (D) during use, either in a state where it was laid down from the fully open state to the fully closed state and vice versa. One end (37a) of the load support spring (37) is locked to the spring receiving pin (29) on the side support stay (S) side, and the other end (37b) of the load support spring (37) is also cut off. ) Is engaged with the spring receiving concave circumferential groove (41) on the rotation lock pin (K) side, and the rotation lock pin (K) is connected to the side support stay (S) as shown in FIGS. The side support stay (S) can rotate integrally with the rotating shaft (14) of the swing damper (D). .

However, if the load support spring (37) breaks down during use over time, or if one of its separated ends (37a) is detached from the spring receiving pin (29). When the accident occurs as shown in FIGS. 18 and 19, the rotation lock pin (K) released from the engagement with the other end (37b) of the load supporting spring (37) is released. It will be inserted and locked by itself into the lock pin receiving hole (26) on the side support stay (S) position, and the side support stay (S) and then the swing damper (D) and opening and closing Since the rotation of the lid (C) is locked, there is no danger in use, and the use can be continued without any trouble by replacing the load support spring (37) or performing necessary reassembly.

Although the embodiment of the present invention applied to the opening / closing lid of the underfloor inspection port has been described above based on FIGS. 1 to 19, the present invention applies not only to the underfloor inspection port but also to the opening / closing lid for the underfloor storage. Can be applied.

That is, FIGS. 20 and 21 show another embodiment of the present invention applied to an underfloor storage that is slid as a double type (however, only one is shown). ) Is opened and closed by the opening / closing lid (C). Since the structure and opening / closing action as the lid opening / closing mechanism are substantially the same as those of the above-described embodiment of FIGS. 1 to 19, only the same reference numerals as those of FIGS. Detailed description is omitted.

As shown in FIGS. 20 and 21, in the sliding underfloor storage, a pair of left and right hanger brackets (47) are attached and integrated to the upper edge (46) of the opening of the underfloor main body (45). Has been. The hanger bracket (47) is made of a substantially inverted U-shaped metal plate, and a pulley (48) pivotally supported in the groove rolls on a pair of left and right parallel hanger rails (49). 49) in the front-rear direction.

The hanger rail (49) of the pulley (48) is located below the traveling guide rail (G) of the idle roller (roller) (31) described with reference to FIGS. It is fixed to the material (outline) (50) by welding or other fixing means.

In the lid opening / closing mechanism of the present invention, the traveling guide rail (G) of the idler roller (31) is configured to be attached and fixed to the floor structure material (joist) (5). The left-right mutual gap between the opening / closing lid (C) pivotally attached to the frame (F) and the upper opening edge (46) of the underfloor storage body (45), the outer frame (F) and the underfloor storage body (45 Even if the gap between the left and right is narrow, it can be installed in the gap without hindrance.

Furthermore, in the case of a configuration in which the traveling guide rail (G) of the idler roller (31) is attached and fixed to the floor structure (joist) (5), the lid opening / closing mechanism of the present invention is provided. There is an advantage that it can be easily retrofitted to an existing building.

However, instead of attaching and fixing the traveling guide rail (G) of the free-rolling roller (31) to the existing floor structure (joist) (5), it is attached and fixed to the extended lower end of the outer frame (F). Alternatively, as shown in FIG. 22, the outer frame (F) is extruded from an aluminum material as a continuous integrated product with a traveling guide rail (G) of the idle roller (31) attached to the lower end thereof. Along with the outer frame (F) with the traveling guide rail (G), the countersunk screws (34) (51) distributed in a plurality of points to the floor board (1) and / or the floor structure (joist) (5). It may be attached and fixed with an adhesive or the like. According to this, it is useful for improving the workability and mass production effect for a new building.

The traveling guide rail (G) of the idle roller (31) is not limited to the channel groove shape with the lip (32) as shown in the illustrated embodiment, and the idle roller (31). Can be moved linearly in the front-rear direction, it can be used as an E-shaped or other non-channel grooved travel guide rail (G).

(1) ・ Floor board (2) ・ Standing wall (5) ・ Floor structure material (joist)
(7) · Lid frame (8) · Hinge (9) · Rotating handle (11) · Angle shaped steel plate (11a) · Seat plate piece (11b) · Standing plate piece (14) · Rotating shaft (14a) · Output Shaft (15), Working chamber (16), Valve body (17), Closed surface (18), Case (19), Partition projection (20), Mounting disc (21), Bearing port (22), Tooth (23) · Claw (25) · Tension coil spring (26) · Lock pin receiving hole (27) · Pin receiving plate piece (28) · Screw hole (29) · Spring receiving pin (30) · Roller spindle ( 31) ・ Swivel roller (35) ・ Stopper (37) ・ Load support spring (37a) ・ Removing one end (37b) ・ Removing other end (38) (39) ・ Pin insertion hole (40) ・ Bearing plate (41) · Spring receiving concave groove (42) · Compression coil spring (43 Spring receiving washer (45) & underfloor storage case body (46) opening onto edges (47) hanger bracket (48), the pulley (49), the hanger rail (50) Yukakumi structural material (Obiki)
(A) ・ Closed direction (B) ・ Mounting bracket (C) ・ Opening and closing cover (D) ・ Oscillating damper (F) ・ Outer frame (G) ・ Running guide rail (K) ・ Rotation lock pin (O) -Inspection port (R)-Opening direction (S)-Side support stay (P1)-First fulcrum shaft (P2)-Second fulcrum shaft (α)-Margin angle (play angle)
(Β) (γ) (θ) ・ Rotation angle range (X1-X1) (X2-X2) ・ Circular movement locus

Claims (4)

An open / close lid pivotably pivoted through a horizontal first fulcrum shaft to an outer frame in the form of a frame that partitions the opening of the underfloor inspection opening or underfloor storage body;
A pair of left and right side support stay mounting brackets fixed to the middle part of the opening / closing lid from the back side;
Via a second pivot shaft of each horizontal to the mounting bracket, a pair of right and left side support stay having a base end portion is pivoted freely pivoted,
A pair of left and right load support springs respectively wound around the second fulcrum shaft of the side support stay to urge and urge the opening / closing lid in a pivoting direction that always raises and opens the lid;
A pair of left and right idler rollers each pivotally supported on the tip of the side support stay;
For an underfloor inspection port or underfloor storage provided with a pair of left and right parallel traveling guide rails arranged in a fixed state to the outer frame or the floor structure in order to move the idler roller in the front-rear direction. In the lid opening and closing mechanism,
The second fulcrum shaft that becomes the winding core of the load supporting spring is a swinging damper that can rotate integrally with the side support stay of the opening / closing lid, and a braking torque in the closing direction is generated from the swinging damper ,
On the contrary, the braking torque of the oscillating damper, which becomes relatively weak with the load of the opening / closing lid, becomes relatively stronger as the rotation proceeds in the direction of closing the lid around the first fulcrum shaft. Complemented by the tension of the load support spring,
While the above-mentioned opening / closing lid is made to lie down under a substantially uniform rotation speed as a whole up to the fully closed state ,
A lid opening / closing mechanism for an underfloor inspection port or an underfloor storage, characterized in that the tension of the load support spring can be adjusted . To the output shaft of the horizontal swing damper is axially rack to the mounting bracket for the right and left pair of side support stay, the center portion of the mounting disc, which is shaped to the proximal end of the side support stay, each may rotate integrally As well as inserting and fitting
While engraving teeth on the circumferential surface of the mounting disk for a certain rotation angle range,
In the middle course of the open closure raised raised from its fully closed state to the fully open state, the locking claw for locking only the teeth when releasing the operation manual of the lid to the mounting bracket, and always meshed The lid opening / closing mechanism for an underfloor inspection port or an underfloor storage according to claim 1, wherein the lid opening / closing mechanism is pivotally attached to a state in which the pressure is biased in a locking direction. While distributing a plurality of screw holes for adjusting the strength of tension in the load support spring along the arc motion locus of the arc-shaped pin receiving plate piece formed in the middle part of the side support stay,
While locking the relatively long one end of the load supporting spring to a horizontal spring receiving pin that is alternatively screwed into the screw hole of the pin receiving plate piece,
As a state in which the side supporting swing damper for mounting brackets stay with the axis to each other parallel to the fixed lateral bridging the horizontal spring receiving pins, that also is locking the relatively short disconnect the other end of the load support spring The lid opening / closing mechanism for an underfloor inspection port or an underfloor storage as claimed in claim 1. Insert the center part of the mounting disk formed on the base end of the side support stay into the output shaft of the horizontal swing damper pivoted on the side support stay mounting bracket so that they can rotate together. Mated,
Along the arcuate movement path of the mounting disc, a plurality of lock pin receiving hole causes open distribution,
Mounting the side support stay as a long rotating lock pin with a spring receiving concave groove cut out at the neck of the horizontal spring receiving pin for locking the other end of the load supporting spring that is relatively short to bracket its tip as repression bias state of the lock pin receiving hole to the insertion engagement locked by the direction of the normal time the mounting disc, characterized in that installed narrowing through a telescopically movable or retractable claim 3. A lid opening / closing mechanism for the underfloor inspection port or underfloor storage as described in 3.

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