JP2005054399A - Escape ladder housing frame and method of producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an escape ladder housing frame which is reduced in parts count, formed in a manner saving the labor of welding etc. and preventing degradation in corrosion resistance, and facilitates opening of an upper cover, and to provide a method of producing the escape ladder housing frame. <P>SOLUTION: The housing frame 3 is set in an opening formed in a slab 1 of a floor, a veranda, or the like, for housing therein a foldable escape ladder 10, and covered with the upper cover 5 which is pivotally mounted on one side of an upper edge 34 such that one side-end of the cover is openable. The housing frame is produced by forming folded edge pieces 35, 38 along side portions extending in a longitudinal direction of a single metal plate, forming a bulge portion 32 which is embedded in the slab, on a side piece 31 except for both ends of the same, cutting away four notches 36a to 36d in the folded edge piece 35 at suitable intervals, squarely folding the side piece 31 having the notches 36a to 36d by press-forming, and fixing both edges of the side piece 31 by welding. In this manner the housing frame 3 thus formed is produced by carrying out a blanking/drawing step, a folding/drawing step, a four-side bending step, and a welding step. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a storage frame for an evacuation ladder and a method for manufacturing the same, and more particularly to a storage frame for an evacuation ladder installed on a veranda such as an apartment house or an office building and a method for manufacturing the same.

  Conventionally, as a storage frame for this type of evacuation ladder, an upper body installed in an opening provided in a slab such as a floor or a veranda, and a skirt attached above the upper body and exposed to the veranda or the like, The thing of the structure formed with the lower main body attached below the upper main body and exposed below a veranda etc. is known (for example, refer patent document 1).

  Also known is a structure that forms a four-sided frame by fixing a surrounding member, which is a four member integrally formed with an upper frame, a middle frame, and a lower frame of a storage frame, to a square member by welding or adhesion. (For example, refer to Patent Document 2).

In general, the upper opening of the storage frame is closed by an upper lid so that it can be opened and closed. When using an evacuation ladder stored inward, put a hand in the handle formed on the free end of the upper lid. The upper lid is opened by lifting the upper lid. In this case, the opening of the storage frame is closed by the upper lid in order to prevent falling or the like in normal times, but the gap between the upper lid and the slab is narrow for aesthetic reasons.
JP 2003-159344 A (paragraph numbers 0014, 0015, FIG. 2, FIG. 4) Japanese Utility Model Publication No. 6-32124 (Utility Model Registration Request, FIGS. 1 and 5)

  However, the former, that is, the one described in Japanese Patent Application Laid-Open No. 2003-159344 has a skirt (upper frame), an upper main body (middle frame), and a lower main body (lower frame) formed separately. Since it has to be assembled with bolts or the like, there are problems that the number of constituent members increases and that it takes time to assemble.

  In the latter, that is, the one described in Japanese Utility Model Publication No. 6-32124, the upper frame, the middle frame, and the lower frame can be integrally formed, but a square member is interposed between the surrounding member and the surrounding member, and welding is performed. The problem is that it takes a lot of time to manufacture because it is fixed by, for example. Also, in the case of welding, since the waterproof performance is reduced due to poor welding and the corrosion resistance of the welded portion is reduced, rusting occurs when embedded in a rusting environment such as a veranda, which not only impairs the appearance but also the strength. There was a problem that a decrease in the amount occurred.

  In addition, the upper lid of the storage frame is attached in the state close to the upper frame portion of the storage frame in order to improve the appearance and secure a use space such as a veranda, and between the upper lid and the upper frame portion. Since there is only a slight gap, there is a problem that it takes time to open the upper lid.

  The present invention has been made in view of the above circumstances, and reduces the number of structural members of the storage frame, prevents troubles such as welding and the deterioration of corrosion resistance due to welding, and facilitates opening of the upper lid attached to the storage frame. It is an object of the present invention to provide a storage frame for an evacuation ladder and a method for manufacturing the same.

  In order to solve the above-described problems, the storage frame for an escape ladder according to the present invention is installed in an opening provided in a slab such as a floor or a veranda, and stores the folding escape ladder inward, and one side of the opening. A storage frame for an evacuation ladder pivotably attached to one end of the lid so as to be openable and closable, wherein a bent edge is formed on a side portion along the longitudinal direction of one metal plate, and both side ends are left. A bulge portion embedded in the slab is formed on a piece, cutouts are formed at four positions at an appropriate interval between the bent edge pieces, and the side piece where the cutout is located is formed into a right angle by press molding. It is bent and formed into a square shape, and both ends of the side piece located on the free end side of the lid are fixed to each other by welding (Claim 1).

  Further, the manufacturing method of the storage frame for an escape ladder according to the present invention is installed in an opening provided in a slab such as a floor or a veranda, and stores the folding escape ladder inward and a lid on one side of the opening. A method of manufacturing a storage frame for an evacuation ladder that pivots so that an end of one side is openable and closable, wherein both end portions along one longitudinal end of one band-shaped metal plate and side portions along the longitudinal direction are appropriately Side pieces between the first notch and the second notch and between the third notch and the fourth notch are formed by notching the first to fourth four places spaced apart. A punching / drawing process for forming a mounting projection and a hole for the lid opening / closing link, and bending the side portion where the notch is formed to form a bent edge piece, leaving both side ends. Bending / drawing process for drawing a bulge embedded in the slab on the side piece, and the notch was formed A four-side bending step of forming the side piece in a vertical shape into a rectangular shape by press molding, and a welding step of superimposing both ends of the side piece and fixing by welding. (Claim 2).

  In the method for manufacturing a storage frame for an escape ladder according to the present invention, it is preferable that the welding in the welding process is performed by seam welding.

  Since the storage frame for evacuation ladder and the manufacturing method thereof according to the present invention are configured as described above, the following effects can be obtained.

  (1) According to the invention described in claim 1, since the storage frame can be formed by press-molding one metal plate, the number of constituent members can be reduced. Moreover, since only one welding part is required, it is possible to reduce the labor of manufacturing by welding, to prevent deterioration of corrosion resistance due to welding, and to improve aesthetics.

  In addition, a bulge portion embedded in the slab is formed on the side piece that leaves both end portions along the longitudinal direction of the metal plate, and the upper lid is attached to the storage frame by fixing both ends of the side piece by welding. Since the space for handling can be formed between the upper lid and the storage frame in the attached state, the upper lid can be easily opened.

  (2) According to the invention described in claim 2, since the storage frame can be formed by the punching / drawing step, the bending / drawing step, the four-side bending step, and the welding step, A storage frame having a bulging portion can be easily and accurately created. In addition, the number of constituent members can be reduced, and the manufacturing cost can be reduced.

  Further, by performing seam welding in the welding process, the air-tightness of the welded portion is improved, so that deterioration of the corrosion resistance of the welded portion due to water immersion can be prevented and the aesthetic appearance can be improved. .

  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 (expanded state) of a storage frame for an escape ladder and an escape ladder device according to the present invention, and FIG. 2 is a cross-sectional view showing an open state of the storage frame for an escape ladder, an upper lid, and a lower lid 3 is a cross-sectional view showing a folded state (stored state) of the storage frame for the escape ladder and the upper lid and the lower lid, and FIG. 4 is a perspective view of the storage frame for the escape ladder.

  As shown in FIG. 1, the evacuation ladder device includes a pair of left and right extendable bodies 13 that are vertically expandable and contractable by connecting a plurality of outer vertical bars 11 and inner vertical bars 12 in a pantograph shape, and these extendable bodies 13. A ladder body 10 is provided that includes a plurality of leg rails 14 connected to the lower ends of the outer vertical rails. The upper end of the outer vertical beam 11 and the lower end of the inner vertical beam 12 are pivotally connected (connected) by a pin (not shown) so that the position near the lower end of the outer vertical beam 11 and the upper end of the inner vertical beam 12 are connected. Is pivotally connected (connected) by a pin (not shown).

  The outer vertical rail 11 at the top of the ladder body 10 is an inner surface of the storage frame 3 that is fitted and fixed to a slab opening 2 provided in a slab 1 such as a floor or a veranda via a seal member (not shown). It is pivotally attached to the ladder receiver 4 fixed to it via a pivot pin 11a.

  Further, the uppermost outer vertical beam 11 constitutes a four-joint parallel link mechanism 21 in cooperation with a parallel link 20 whose one end is rotatably attached to the ladder receiver 4.

  The ladder receiver 4 is formed by bending a metal plate such as steel, for example, and fixed pieces 40 fixed to the storage frame 3 with fixing bolts 4a, and projecting parallel to both ends of the fixed pieces 40. A pair of attachment pieces 41 for attaching the upper outer vertical beam 11 and the parallel link 20 and a reinforcing frame 42 for use as a footrest for connecting the tip portions of the attachment pieces 41 by fixing means such as welding are provided.

  By configuring in this way, the strength of the ladder receiver 4 can be increased, and since there is no need to provide a separate footrest on the storage frame 3, it is possible to reduce the number of structural members, and the later-described slow down device 8 Installation work such as mounting can be facilitated.

  As shown in FIG. 1, the slow descending device 8 is provided on a fixed piece 40 of the ladder receiver 4. This slow descending device 8 includes a ratchet mechanism having a winding drum (not shown), and a wire rope 8 a wound around the winding drum is interposed between the inner vertical rails 12 on the lower end side of the ladder body 10. It connects with the wire receiver 9 constructed through the hook 9a. When the upper and lower lids 5 and 6 are opened by the slow down device 8, the ladder body 10 is extended and lowered while being controlled, and the ladder body 10 is pulled up by winding the wire rope 8 a and the inside of the storage frame 3. It is designed to be stored. A handle bar 55 is attached to the inner surface of the upper lid 5.

  The outer vertical rail 11 and the inner vertical rail 12 are formed, for example, in a substantially crank shape in cross section by bending a metal plate such as steel. Further, the crosspiece 14 is formed, for example, in a substantially U-shaped cross section by bending a metal plate such as steel, and a plurality of non-slip protrusions (not shown) are formed on the horizontal piece facing the opening. Is protruding.

  The storage frame 3 is formed of, for example, a stainless steel member embedded in and fitted into the slab opening 2, and extends upward from the middle frame portion 30 embedded in the slab 1. And is exposed to the floor surface side of the slab 1, and is exposed to the upper edge portion 34 to which the upper lid 5 is attached and the ceiling surface side of the floor immediately below the slab 1 extending downward from the middle frame portion 30. The lower edge portion 37 is integrally formed.

  The middle frame portion 30 includes a side piece 31 that covers the slab opening 2, a bulge portion 32 that bulges from the outer surface of the side piece 31 into the slab 1 and is embedded in the slab 1 and serves as an anchor, and a pair A link attachment portion 33 for attaching the lid opening / closing link mechanism 7 is formed at a location where the side piece 31 faces.

  The bulging portion 32 includes an upper bulging piece 32 a that protrudes downwardly from the upper portion of the side piece 31 toward the outside of the side piece 31, and an outward portion of the side piece 31 from an intermediate portion of the side piece 31. The lower bulging piece 32b protrudes substantially at a right angle, and the upper bulging piece 32a and the lower bulging piece 32b are continuous with the tips of the lower bulging piece 32b and are vertically bent with respect to the bulging pieces 32a and 32b. . By forming the bulging portion 32 on the side piece 31 as described above, it is possible to improve the adhesion to the slab 1 and the water tightness, and to improve the strength of the storage frame 3. In this case, as shown in FIGS. 1, 4 and 5, the bulging portion 32 is not formed in a portion where the handle portion 53 of the upper lid 5 attached to the upper edge portion 34 is located. Since the gap between the lid 5 and the storage frame 3 can be widened, the handle 53 can be easily grasped, and the upper lid 5 can be easily opened and closed.

  The link attachment portion 33 is formed on the ladder receiver 4 side of a pair of side pieces 31 orthogonal to the side piece 31 to which the ladder receiver 4 is attached, and bulges inward of the slab opening 2 and faces inward. The mounting projection 33a is formed in a substantially cylindrical shape with a reduced diameter, and the mounting hole 33b is formed in the center of the mounting projection 33a to attach the lid opening / closing link mechanism 7. By thus forming the link attachment portion 33 so as to bulge on the side piece 31, the lid opening / closing link mechanism 7 can be attached to the storage frame 3.

  Further, as shown in FIG. 2, the lower cover 6 is pivotally attached to the side piece 31 to which the ladder receiver 4 is attached so as to be openable and closable. A stop portion 30a is formed, and a mounting bolt 30b for slidably attaching a free end of a lower lid stay 60 whose one end is pivotally attached to a lower lid edge 62 of the lower lid 6 to be described later at a substantially central lower portion. It is attached.

  The upper edge portion 34 extends from the side piece 31 of the middle frame portion 30 and bends vertically toward the inside of the slab opening 2 and has a substantially bowl-shaped cross section with the tip bent downward. A bent edge piece 35 is formed. By forming the upper bent edge 35 having a substantially bowl-shaped cross section on the upper edge 34 in this manner, the strength of the storage frame 3 is improved, and when the evacuee passes the upper edge 34, Etc. can be caught. In this case, a first cutout 36a, a second cutout 36b, a third cutout 36c, and a fourth cutout 36d are formed in the upper bent edge piece 35 at the four corners of the upper edge 34. Yes. Thus, since the notches 36a, 36b, 36c, and 36d are formed in the four corners of the upper edge portion 34, the corner portion is not wrinkled. Further, pivoting portions 34a that pivotably mount the upper lid 5 so as to be openable and closable are formed on one side of the upper edge portion 34, that is, on both ends of the side to which the ladder receiver 4 of the middle frame portion 30 is attached.

  The upper bent edge piece 35 is not limited to the one bent inward of the slab opening 2, but as shown in FIG. 8A, the upper bent edge piece 35 is bent upward. You may form in the edge piece 35A. Further, the bulging portion 32 is not limited to the upper bulging piece 32a that faces the bulging portion, and as shown in FIG. 8B, the upper bulging piece 32a and the lower bulging piece 32b are parallel to each other. The bulging portion 32A may be formed on the surface.

  The lower edge portion 37 is bent downward vertically from the lower end side portion of the side piece 31 of the middle frame portion 30 toward the outside of the slab opening 2 and has a substantially bowl-shaped cross section with the tip bent upward. It is formed by the curved piece 38. In this case, notches may be formed in the lower bent edge piece 38 at the four corners of the lower edge portion 37 in the same manner as the upper bent edge piece 35. By forming the lower bent edge piece 38 having a substantially bowl-shaped cross section in the lower edge portion 37 in this manner, the strength of the storage frame 3 is improved in cooperation with the upper bent edge piece 35, and the evacuees can When passing through the lower edge piece, it is possible to prevent the clothes from being caught.

  As shown in FIG. 1, the upper lid 5 has a rectangular upper lid plate 51 that covers the upper edge 34 of the storage frame 3 that is formed in a square shape, and is substantially downward from the four sides of the upper lid plate 51. The upper lid edge 52 bent at a right angle is integrally formed. Further, one end of the pair of upper lid edges 52 is pivotally attached to a pivot attachment portion 34a formed on the upper edge portion 34 of the storage frame 3, and the other end is a handle portion for opening and closing the upper lid 5. 53 is formed. The handle portion 53 is formed by bulging the approximate center of the upper lid edge 52 to the upper outer portion of the upper lid 5. In this case, since the bulging portion 32 is not formed at the position where the handle portion 53 of the storage frame 3 is located, the evacuees can easily grasp the handle portion 53 and easily open and close the upper lid 5. (See FIGS. 1, 4 and 5).

  A pair of link attachment pieces 54 to which one end of the lid opening / closing link mechanism 7 is pivotally attached are attached to the side surface of the storage frame 3 of the upper lid plate 51. A rod 55 is attached (see FIGS. 1 to 3).

  The lower lid 6 includes a rectangular lower lid plate 61 accommodated in the lower edge portion 37 of the storage frame 3, and a lower lid edge 62 that is bent substantially perpendicularly from the four sides of the lower lid plate 61 upward. And are integrally formed. In addition, an engagement receiving portion 63 cut out in a hook shape is formed at one end of the pair of lower lid edges 62, and is rotatably engaged with an engagement portion 30a formed in the middle frame portion 30. Yes. One end of the lid opening / closing link mechanism 7 is pivotally attached to the lower lid edge 62 on the side of the latch receiving portion 63, and one end of the lower lid stay 60 is pivotally attached to the approximate center of the lower lid edge 62. (See FIGS. 1 and 2).

  The upper lid 5 and the lower lid 6 thus configured are connected to each other via a lid opening / closing link mechanism 7, and when the upper lid 5 is opened upward, the upper lid 5 is in an upright posture. Is fixed and held, and the lower lid 6 is automatically opened downward in conjunction with it. Further, the middle frame portion 30 and the lower lid 6 are slidably connected to the lower lid stay 60 to assist in opening and closing the upper lid 5 and the lower lid 6 and restrict the open state of the lower lid 6. be able to.

  Next, the manufacturing method of the storage frame 3 formed as described above will be described with reference to the drawing shown in FIG. 6 and the flowchart shown in FIG.

  First, as shown in FIG. 6A, a first metal plate having a proper distance between both ends 3a and 3b along the longitudinal direction of one side end of a strip-shaped metal plate, for example, a stainless steel plate, and sides along the longitudinal direction. The notch 36a, the second notch 36b, the third notch 36c, and the fourth notch 36d are notched and formed between the first notch 36a and the second notch 36b and the second notch 36b. A punching / squeezing process for forming the mounting protrusion 33a and the mounting hole 33b of the lid opening / closing link mechanism 7 on the side piece 31 between the third notch 36c and the fourth notch 36d is performed (step 7-1). .

  Next, as shown in FIG. 6B, the side portions where the first to fourth notches 36a, 36b, 36c, 36d are formed are bent to form the upper bent edge piece 35, The side portion on which the notch is not formed is bent in the direction opposite to the upper bent edge piece 35 to form the lower bent edge piece 38, and the upper side bent portion 38 is left bent. A bending / drawing step of drawing the bulging portion 32 protruding in the direction opposite to the bending direction of the edge piece 35 is performed (step 7-2).

  Next, as shown in FIG. 6-3, the side piece 31 at the position where the cutouts 36a, 36b, 36c, 36d of the upper bent edge piece 35 are formed is bent at a right angle by press forming to form a square shape. A four-side bending process is performed (step 7-3).

  In this four-way bending step, the insert may be in contact with the inner side of the bent portions of the upper bent edge piece 35 and the lower bent edge piece 38 to form a square shape. By using the nesting in this way, wrinkles generated inside the bent portion can be prevented and the appearance can be improved.

  As shown in FIG. 6-4, the rectangular frame formed in this way is disposed, for example, between the upper roller electrode 103 and the lower roller electrode 104 of the seam welding machine 100 where the both ends of the side piece 31 overlap. A welding process for welding is performed, and the manufacturing operation is completed (step 7-4).

  As shown in FIG. 6-4, the seam welder 100 includes an upper electrode arm 101 protruding from a seam welder main body (not shown), a position below the upper electrode arm 101, and an upper electrode arm 101. A lower electrode arm 102 protruding in parallel, an upper roller electrode 103 attached to the tip of the upper electrode arm 101 so as to be rotatable and movable up and down, a rotatable electrode attached to the tip of the lower electrode arm 102, and a side surface The lower roller electrode 104 that can come into contact with the side surface of the upper roller electrode 103 is mainly configured.

  The seam welding machine 100 configured as described above is configured so that the overlapping end portions of the side pieces 31 of the storage frame 3 disposed between the upper roller electrode 103 and the lower roller electrode 104 are connected to the upper roller electrode 103 and the lower roller electrode. It is possible to perform continuous welding by pressurizing between 104 and energizing to rotate both roller electrodes 103 and 104. Therefore, since the welded portion is continuously welded in a pressurized state, the airtightness of the welded portion can be improved. Moreover, the pre-processing accuracy of the welded portion can be eliminated, and a stable welding operation can be performed without requiring skill in the welding operation.

  Since the storage frame 3 for an escape ladder according to the present invention configured as described above can be formed by press-molding a single metal plate, the components of the storage frame 3 can be reduced. Moreover, by making a welding part into one place, while being able to reduce the effort of manufacture by welding, the fall of the corrosion resistance by welding can be prevented and the improvement of an external appearance etc. can be aimed at. Further, since the bulging portion 32 is not formed on the side piece 31 where the handle 53 of the upper lid 5 of the storage frame 3 is located, the gap between the upper lid 5 and the storage frame 3 can be widened, and the upper lid 5 Can be easily opened.

  Further, the manufacturing of the storage frame 3 includes a punching / drawing process (step 7-1), a bending / drawing process (step 7-2), a four-side bending process (step 7-3), and a welding process (step 7). -4), it is possible to reduce the number of constituent members and reduce the manufacturing cost.

  Further, by performing seam welding in the welding process, the airtightness of the welded portion is improved, so that the corrosion resistance of the welded portion can be prevented from being deteriorated due to water immersion, and the aesthetic appearance can be improved.

It is a perspective view which shows the use condition (expanded state) of the escape ladder apparatus which has the storage frame for escape ladders concerning this invention. It is sectional drawing which shows the open state of the said storage frame for escape ladders, an upper cover, and a lower cover. It is sectional drawing which shows the folding state (storage state) of the said storage frame for escape ladders, an upper cover, and a lower cover. It is a perspective view of the storage frame for the escape ladder. It is a front view of the said evacuation ladder storage frame. It is the top view (a) and side view (b) which show the punching / drawing process in the manufacturing method of the said refuge ladder storage frame. It is the top view (a) and side view (b) which show the bending and drawing process in the manufacturing method of the said refuge ladder storage frame. It is the top view (a) and side view (b) which show the four-way bending process in the manufacturing method of the said refuge ladder storage frame. It is a perspective view which shows the welding process in the manufacturing method of the said storage frame for escape ladders. It is a flowchart which shows the procedure of the manufacturing method of the said storage frame for escape ladders. It is sectional drawing (a) which shows the 1st modification of the said storage frame for escape ladders, and sectional drawing (b) which shows a 2nd modification.

Explanation of symbols

3 Storage frame 7 Lid opening / closing link mechanism
31 side piece 32 bulging portion 33a mounting projection 33b mounting hole (hole)
35 Upper bent edge piece 36a First notch portion 36b Second notch portion 36c Third notch portion 36d Fourth notch portion 38 Lower bent edge piece

Claims (3)

Evacuation ladder storage that is installed in an opening provided in a slab such as a floor or a veranda, and stores a folding escape ladder inward and pivotally attaches one end of the lid to one side of the opening so that it can be opened and closed. A frame,
A bent edge piece is formed on a side portion along the longitudinal direction of one metal plate, and a bulge portion embedded in the slab is formed on a side piece leaving both side end portions. Notches are formed at four intervals, and the side piece where the notch is located is bent into a right angle by press molding to form a square shape, and the side piece located on the free end side of the lid A storage frame for an escape ladder, wherein both ends are fixed by welding. Evacuation ladder storage that is installed in an opening provided in a slab such as a floor or a veranda, and stores a folding escape ladder inward and pivotally attaches one end of the lid to one side of the opening so that it can be opened and closed. A method of manufacturing a frame,
Both the end portions along the longitudinal direction of one side end of one band-shaped metal plate and the first to fourth four places with appropriate spacing of the side portions along the longitudinal direction are cut and formed, and the first A punching / squeezing process for forming a projection and a hole for attaching the lid opening / closing link to the side piece between the notch and the second notch and between the third notch and the fourth notch;
Bending / drawing step of bending the side portion where the notch is formed to form a bent edge piece, and drawing the bulge portion embedded in the slab on the side piece leaving both side end portions When,
A four-side bending step in which the side piece at the position where the notch is formed is bent at a right angle by press molding to form a square;
And a welding step in which both ends of the side piece are superposed and fixed by welding. In the manufacturing method of the storage frame for escape ladders according to claim 2,
A method for manufacturing a storage frame for an escape ladder, wherein the welding in the welding process is seam welding.

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