JP4570085B2 - Lid installation structure for evacuation equipment - Google Patents

Description

  The present invention relates to a lid mounting structure in an evacuation device. More specifically, the present invention relates to a storage frame attached to a hole provided in a slab such as a floor or a veranda, and an evacuation stored by being folded in the storage frame. A lid for an evacuation device comprising: a ladder for use; an upper lid and a lower lid pivotally attached to a floor surface side and a ceiling surface side of the storage frame; and a link mechanism for interlockingly opening and closing the upper lid and the lower lid. This relates to the improvement of the structure.

  Generally, as this type of evacuation device, a storage frame attached to a hole provided in a slab such as a floor or a veranda, and an upper lid and a lower lid pivotally attached to the floor surface side and the ceiling surface side of the storage frame, respectively. A link mechanism for connecting the upper lid and the lower lid to each other, opening and closing the lower lid in conjunction with opening and closing of the upper lid, and fixing the upper lid substantially upright when opened, and a storage frame It is known to have a ladder that is folded and stored and that extends to the lower floor or its vicinity when the upper and lower lids are opened.

  The evacuation device configured as described above is generally configured so that the lower lid can be opened and closed in conjunction with the opening and closing of the upper lid. When the lower lid is opened, the lower lid is affected by wind pressure and the like. The link mechanism is provided with an absorption function so that it will not be transmitted to the upper lid via the link mechanism even if it is slightly shaken. Conventionally, the link mechanism is fixed to a bell crank pivotally attached to a storage frame, an upper link pivotally attached to an upper end portion and an upper lid of the bell crank, and a lower end portion and a lower lid of the bell crank. And a lower link pivotally attached to the bracket. And in order to give the said absorption function to the pivot part of a lower link and a bracket, the long hole which followed the longitudinal direction was provided in the lower link, and the pivot part is formed in this long hole so that sliding is possible ( For example, see Patent Document 1).

By pivotally attaching the bracket and the lower link fixed to the lower lid as described above, it is possible to give strength to the pivoted portion of the lower lid and the lower link, which is loaded to the maximum.
Japanese Patent No. 3205810 (Claims, FIG. 2)

  However, in the structure described in Japanese Patent No. 3205810, there are many components, and the lower link is attached via a bracket fixed to the lower lid, so that there is a problem that it takes time to attach the lower lid.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a lid mounting structure in an evacuation device that can reduce the number of components, facilitate mounting, and improve strength. It is what.

In order to solve the above-mentioned problems, the invention described in claim 1 is characterized in that a storage frame attached to a hole provided in a slab such as a floor or a veranda, and pivotally attached to a floor surface side and a ceiling surface side of the storage frame, respectively. The upper lid and the lower lid are connected to each other, and the upper lid and the lower lid are connected to each other, the lower lid is opened and closed in conjunction with the opening and closing of the upper lid, and the upper lid is fixed and maintained substantially upright when opened. In the evacuation device comprising a mechanism and a ladder that is folded and stored in the storage frame and that extends to the lower floor or the vicinity thereof when the upper lid and the lower lid are opened, the link mechanism includes: A bell crank pivotally attached to the storage frame, an upper link pivotally attached to the upper end portion of the bell crank and the upper lid, and a lower portion pivotally attached to the lower end portion of the bell crank and the lower lid. Composed of links and The pivoting portion between the bell crank and the lower link is inserted into a long hole formed along the longitudinal direction of the lower link so as to prevent the rotation of the lower lid from being transmitted to the bell crank side by absorption. The lower lid is formed to be slidable, and the lower lid includes an upright wall that constitutes a pivot joint portion of the lower lid and the lower link, and a reinforcing flange that is bent from the tip of the upright wall. The drawing processing section is characterized by comprising a drawing portion bent in a curved shape at the leading edge of the upright wall and the leading edge of the flange in the vicinity of the pivoting portion .

  By configuring in this way, the link mechanism includes a bell crank pivotally attached to the storage frame, an upper link pivotally attached to the bell crank and the upper lid, and a lower link pivotally attached to the bell crank and the lower lid. And can be configured. In addition, when the lower lid receives wind pressure when opened, the pivoted portion of the bell crank and the lower link absorbs by sliding in the long hole provided in the lower link, and the upper lid is closed. The movement can be prevented.

According to the first aspect of the present invention, the lower lid itself can be provided with strength, and the leading edge of the standing wall and the leading edge of the flange in the vicinity of the pivot joint between the lower link and the lower lid are curved. By providing a drawn portion that bends, the strength can be imparted to the pivoting portion of the lower lid where the maximum load is applied with the lower link.

Further, the invention according to claim 2 is the lid mounting structure in the evacuation device according to claim 1, wherein one of the lower link and the lower lid that are in contact with each other at the pivotally attached portion of the lower link and the lower lid, A cylindrical pivot is integrally formed, and the cylindrical pivot is fitted and inserted into a through-hole provided on the other of the pivoted portions, and a nut is attached to a protruding portion of a pivot bolt that penetrates the cylindrical pivot. It is characterized by being screwed together.

  With this configuration, the cylindrical pivot integrally formed on one of the lower link or the lower lid is inserted into a through-hole provided on the other of the pivoting portion, and the pivot that penetrates the cylindrical pivot is inserted. The lower link and the lower lid can be pivotally attached by screwing a nut into the projecting portion of the bolt.

  Since the lid mounting structure in the evacuation device of the present invention is configured as described above, the following effects can be obtained.

  (1) According to the invention described in claim 1, the link mechanism is pivoted between the bell crank pivotally attached to the storage frame, the upper link pivoted to the bell crank and the upper lid, and the bell crank and the lower lid. Since it can be composed of a lower link to be worn, the number of constituent members can be reduced. In addition, when the lower lid receives wind pressure when opened, the pivoted portion of the bell crank and the lower link absorbs by sliding in the long hole provided in the lower link, and the upper lid is closed. Since the movement can be prevented, the safety can be improved.

(2) According to the first aspect of the present invention, the lower lid itself can be provided with strength, and the leading edge of the standing wall and the leading edge of the flange in the vicinity of the pivot joint between the lower link and the lower lid are curved. By providing a drawn portion that bends in a shape, strength can be imparted to the pivotally attached portion of the lower lid where the maximum load is applied with the lower link. Therefore, in addition to the above (1), the strength can be further improved. Can do.

(3) According to the invention described in claim 2 , the cylindrical pivot integrally formed on one of the lower link or the lower lid is inserted into a through hole provided on the other of the pivot attachment portion, and the cylindrical pivot is In addition to the above (1) and (2), the lower link and the lower lid can be further pivotally attached to the lower link and the lower lid by screwing the nut into the protruding portion of the pivot bolt that penetrates the shaft. As a result, it is possible to facilitate the assembly of the pivot mounting portion and to secure the mounting without rattling.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the best embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a use state (deployed state) of an evacuation device to which a lid mounting structure according to the present invention is applied, and FIG. 2 is a perspective view showing a main part of the use state of the evacuation device.

  The evacuation device according to the present invention includes a rectangular storage frame 2 attached to a square hole 1a provided in a slab 1 such as a floor and a veranda, and a floor surface side and a ceiling surface side of the storage frame 2 respectively. The upper lid 3 and the lower lid 4 pivoted by the upper support shaft 7a and the lower support shaft 7b are connected to each other, and the lower lid 4 is opened and closed in conjunction with the opening and closing of the upper lid 3. And a link mechanism 5 that fixes and maintains the upper lid 3 in an almost upright state when opened, and is folded and stored in the storage frame 2 and when the upper lid 3 and the lower lid 4 are opened, the floor below the floor Alternatively, after the ladder 6 extending to the vicinity thereof and the upper lid 3 and the lower lid 4 are opened, the ladder 6 starts to descend, and the extension / lowering speed of the ladder 6 is controlled, and the ladder 6 is pulled up and stored. It is comprised with the slow-down machine 20. Note that the ladder 6 has a structure in which a plurality of horizontal beams 6b are horizontally mounted with a suitable interval between a pair of stretchable bodies 6c pivotally attached to the plurality of vertical beams 6a in a pantograph manner. In addition, a handle 30 is attached to a substantially central portion of the lower surface of the upper lid 3.

  The storage frame 2 has a step part 2a in which a part of the lower part is embedded in the slab 1 on the upper side, and four side wall parts obtained by bending an outward L-shaped lower flange 2b on the lower end. It has a structure in which 2c is a rectangular frame.

  Lower support shafts 7b project from the inner side surfaces of the opposing side wall portions 2c of the storage frame 2 configured as described above, and the lower lid 4 can be opened and closed and detached from the lower support shafts 7b. It is pivotally attached. The lower support shaft 7b is inserted through a through hole (not shown) drilled in the storage frame 2 from the outside, and protrudes in a state of being fixed by, for example, spot welding. By thus fixing the lower support shaft 7b by welding, the lower lid 4 can be easily replaced after the storage frame 2 is embedded in the slab 1 by placing concrete on site.

  A pair of left and right link mechanisms 5 are provided. Each link mechanism 5 includes a bell crank 50 that is pivotally attached to the inner surface of the opposing side wall 2c of the storage frame 2 and a vertically rotatable bell crank 50. An upper link 51 rotatably mounted on the upper end side of the upper first arm portion 50a and a bracket 3a attached to the back surface of the upper lid 3, and a second arm on the lower side of the bell crank 50 The lower link 52 is pivotally attached to the portion 50 b and the lower lid 4, and slides along the longitudinal direction of the lower link 52 at the pivotal portion between the bell crank 50 and the lower link 52. It is made possible.

  In this case, as shown in FIG. 5, the bell crank 50 is formed in a U-shaped cross section having bent pieces 50 c on both side edges to maintain strength, and the intermediate frame has a storage frame 2. A through-hole 53a into which the cylindrical pivot 2e formed on the first and second arms 50a and 50b is inserted is inserted into the pivotal portion of the first and second arms 50a and 50b. 7 and 8, the cylindrical pivots 53b and 53c are integrally formed by, for example, burring. A concave stopper step 54 is provided on the edge of the bell crank 50 with respect to the upper link 51 and the bent piece 50c.

  As shown in FIG. 7, the pivoting portion between the bell crank 50 and the storage frame 2 is a substantially frustoconical mounting portion 2 d bulging inwardly formed on the side wall 2 c of the storage frame 2. For example, the cylindrical pivot 2e integrally formed by burring is inserted into the through hole 53a formed in the bell crank 50 in a slightly protruding state, and the first pivot is used in the cylindrical pivot 2e. It is configured by threading a nut 57a through a washer 56a through the bolt 55a and passing through the protruding portion of the first pivoting bolt 55a.

  As shown in FIG. 5, the upper link 51 is formed in a U-shaped cross-section having bent pieces 51 a at both side edges to maintain strength. Is formed with a through hole 51b into which the cylindrical pivot 53b of the bell crank 50 is inserted and engages with a stopper step 54 of the bell crank 50 on both side edges on the tip side of the through hole 51b. A stopper piece 58 is formed. A through hole 51c is formed at the end of the upper link 51 on the side of the pivot joint with the upper lid 3, and the upper link 51 is provided on the bracket 3a fixed to the back surface of the upper lid 3 in the through hole 51c. The cylindrical pivot shaft 3b is fitted and inserted in a slightly protruding state, and passes through the cylindrical pivot shaft 3b. The second pivot bolt 55b is inserted into the projecting portion of the second pivot bolt 55b via a washer 56b. It is configured by screwing the nut 57b (see FIG. 7).

  Further, as shown in FIG. 7, the pivoting portion between the upper link 51 and the bell crank 50 is fitted and inserted with the cylindrical pivot 53 b of the bell crank 50 slightly protruding into the through hole 51 b of the upper link 51. Thereafter, the end portion of the cylindrical pivot 53b protruding from the through hole 51b is bent outward by caulking. Accordingly, it is not necessary to use pivoting members such as bolts and nuts, the bell crank 50 and the upper link 51 can be simply connected to be rotatable, and rattling between the bell crank 50 and the upper link 51 is prevented. be able to.

  As shown in FIGS. 5 and 8, the lower link 52 is provided with a long hole 52 a extending along the longitudinal direction of the lower link 52 at the end of the pivot joint with the bell crank 50. A cylindrical pivot shaft 52b is integrally formed at the end of the pivot attachment portion, for example, by burring. In this case, a third pivot bolt is inserted into the elongated hole 52a so that a cylindrical pivot 53c provided in the bell crank 50 is slidably protruded and penetrates the cylindrical pivot 53c. A pivoting portion is constituted by 55c and a nut 57c that is screwed to the protruding portion of the third pivoting bolt 55c via a washer 56c (see FIG. 8). Similarly to the pivot portion between the bell crank 50 and the storage frame 2 and the pivot portion between the upper link 51 and the upper lid 3, the cylindrical pivot shaft 52 b provided on the lower link 52 is provided on the lower lid 4. A fourth pivoting bolt 55d that is fitted and inserted into the through hole 46 formed in the opposed upright walls 42, 44 in a slightly projecting manner and penetrates the cylindrical pivot shaft 52b; A pivoting portion is constituted by a nut 57d that is screwed onto the protruding portion of the pivoting bolt 55d via a washer 56d (see FIG. 8).

  As described above, the cylindrical pivot shaft 52b provided in the lower link 52 is inserted into the through hole 46 provided in the upright walls 42 and 44 of the lower lid 4 at the pivot joint portion between the lower link 52 and the lower lid 4. The lower link 52 and the lower lid 4 are not pressed against each other by being inserted in a slightly protruding state, passing through the fourth pivot bolt 55d into the cylindrical pivot shaft 52b, and screwing the nut 57d into the projecting portion. Therefore, smooth rotation can be obtained. This also applies to the pivoting portion between the bell crank 50 and the storage frame 2 and the pivoting portion between the upper link 51 and the upper lid 3. The movement is obtained.

  Further, in the pivotally attached portion of the bell crank 50 and the lower link 52, the cylindrical pivot 53c provided in the bell crank 50 is inserted into a long hole 52a provided in the lower link 52 in a slightly protruding state, By passing the third pivot bolt 55c through the cylindrical pivot 53c and screwing the nut 57c into the protruding portion, the bell crank 50 and the lower link 52 are not pressed against each other. The movement is obtained.

  The cylindrical pivots 52b, 3b, 2e and the through holes 46, 51c, 53a described in the above embodiment may be provided in reverse.

  As shown in FIGS. 2 and 6, the lower lid 4 has standing walls 41, 42, 43, 44 bent at four sides of a rectangular lid base 40, and left and right standing walls 42, 44. A rotation hole 45 through which the lower support shaft 7b can be inserted is formed on the end side, that is, the open / close base end side. In addition, a through hole 46 for pivotally attaching the lower link 52 of the link mechanism 5 is formed on the free opening / closing end side of the lower lid 4 from the rotation hole 45 in the standing walls 42 and 44 (see FIG. 8). Further, reinforcing outward flanges 47 are bent at portions on the free end side of the through holes 46 of the left and right standing walls 42 and 44 in the lower lid 4. In this case, the outward flange 47 of the standing walls 42, 44 is drawn into a curved shape from the leading edge of the standing walls 42, 44 in the portion where the through hole 46 is provided to the leading edge of the outward flange 47. It is provided continuously via the part 48. In this way, by continuously forming the upright walls 42 and 44 and the outward flange 47 via the drawn portion 48 bent in a curved shape, the through hole 46 portion where the maximum load is applied to the lower lid 4 is formed. The strength can be increased and the strength of the lower lid 4 can be increased.

  In order to assemble the link mechanism 5 configured as described above to the evacuation device, first, the bell crank 50, the upper link 51, and the lower link 52 are pivotally attached as described above, and the bell crank 50 and the upper link 51 are connected. And the bell crank 50 and the lower link 52 are pivotally and slidably formed so as to be integrally formed. Next, the upper link 51 may be pivotally attached to the bracket 3 a of the upper lid 3, and the lower link 52 may be pivotally attached to the standing walls 42 and 44 of the lower lid 4.

  In the lid opening / closing structure of the present invention constructed as described above, when the upper lid 3 or the lower lid 4 is closed, the bell crank 50 attaches the first arm portion 50a and the second arm portion 50b to the storage frame 2. The upper link 51 and the lower link 52 are accommodated in the storage frame 2 (see FIG. 3). From this state, when the upper lid 3 moves open with the upper support shaft 7a as a fulcrum, as shown in FIG. 4, the bell crank 50 rotates counterclockwise, and the first arm 50a is moved upward. The two arm portions 50b are respectively moved downward. When the upper lid 3 rotates at a right angle, the stopper piece 58 of the upper link 51 comes into contact with and engages with the stopper step 54 of the bell crank 50, and the upper lid 3 is prevented from opening and moving upward. The movement of the lid 3 in the closing direction is prevented (see FIG. 4).

  In the open state, the lower link 52 and the bell crank 50 are slidably pivoted even when the lower lid 4 is crushed by wind pressure or the like and receives a horizontal load and rotates with the lower support shaft 7b as a fulcrum. Therefore, the rotation of the lower lid 4 can be absorbed by the pivoting portion between the bell crank 50 and the lower link 52, and the rotation of the lower lid 4 is transmitted to the upper lid 3 via the link mechanism 5. There is no. Accordingly, it is possible to prevent a risk that the upper lid 3 is inadvertently closed.

It is a perspective view which shows the use condition (deployment | deployment state) of the evacuation apparatus which concerns on this invention. It is a perspective view which shows the principal part of the use condition of the said evacuation device. It is sectional drawing which shows the closed state of the upper cover and lower cover in this invention. It is sectional drawing which shows the open state of the said upper cover and a lower cover. It is a disassembled perspective view which shows the structural member of the link mechanism in this invention. It is a perspective view which shows the lower link in this invention and the pivotal attachment part of a lower cover. It is sectional drawing which shows the pivot joint part of the bell crank in this invention, a storage frame, and an upper link. It is sectional drawing which shows the pivot joint part of the lower link in this invention, a bell crank, and a lower cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slab 2 Storage frame 3 Upper lid 4 Lower lid 5 Link mechanism 6 Ladder 42,44 Standing wall 46 Through hole 47 Outward flange 48 Drawing part 50 Bell crank 51 Upper link 52 Lower link 52a Long hole 53c Cylindrical pivot 55c pivot Support bolt 57d Nut

Claims (2)

A storage frame attached to a hole provided in a slab such as a floor or a veranda, an upper lid and a lower lid pivoted on the floor surface side and the ceiling surface side of the storage frame, respectively, and the upper lid and lower lid Linked to each other, opens and closes the lower lid in conjunction with opening and closing of the upper lid, and when opened, the upper lid is fixed and maintained substantially upright, and folded and stored in the storage frame, When the upper lid and the lower lid are opened, an evacuation device comprising a ladder extending downstairs or near the floor,
The link mechanism is pivoted to a bell crank pivotally attached to the storage frame, an upper link pivoted to an upper end portion of the bell crank and the upper lid, a lower end portion of the bell crank, and the lower lid. Consisting of a lower link worn,
The pivot portion of the bell crank and the lower link is inserted into a long hole drilled along the longitudinal direction of the lower link to prevent the rotation of the lower lid from being transmitted to the bell crank side by absorption. Slidably formed ,
The lower lid includes an upright wall that constitutes a pivoting portion between the lower lid and the lower link, and a reinforcing flange that is bent from the tip of the standing wall, and in the vicinity of the pivoting portion. A lid mounting structure for an evacuation device , comprising: a drawn portion bent in a curved shape at a leading edge of the standing wall and a leading edge of the flange . In the lid mounting structure in the evacuation device according to claim 1 ,
A cylindrical pivot is integrally formed on one of the lower link and the lower lid that are in contact with each other in the pivotal portion of the lower link and the lower lid, and the cylindrical pivot is provided on the other of the pivotal portions. A lid mounting structure in an evacuation apparatus, wherein the nut is screwed into a protruding portion of a pivot bolt that is inserted into the through hole and penetrates the cylindrical pivot.

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