JP2002242568A - Ladder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance easiness of ascent/descent by making a position of a rung indicated clearly even in dim light after lights-out at night. SOLUTION: A ladder has a pair of right and left supports 2 and the plural stepped rungs 3, which are disposed at prescribed intervals in a longitudinal direction of the supports 2 and make the supports 2 coupled to each other. A luminous body 5 is provided in a tread 3A of the rung 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder which can be used for various applications such as a loft ladder, a vertical ladder, a retractable ladder and the like.

[0002]

2. Description of the Related Art A ladder of this type has a pair of right and left columns, and a plurality of stepping beams arranged at predetermined intervals in the longitudinal direction of the columns and connecting the columns to each other. May be used in the dark or in dim light.

[0003]

For example, in the case of a loft ladder, it often descends from an upper floor room to a lower floor room at night, but after the lights are turned off or in a dim light, the presence of the ladder, particularly the There is a problem that the position is difficult to understand and it is difficult to use a ladder, and it is required to improve the ease of ascending and descending. An object of the present invention is to provide a ladder capable of solving all of the problems of the related art.

An object of the present invention is to provide a ladder in which a luminous body is provided on a tread surface of a tread so that the position of the tread can be clearly specified at night and the ease of ascending and descending can be improved. With the goal.

[0005]

A first concrete means for solving the problem in the present invention is a pair of right and left columns 2 and a pair of columns 2 arranged at predetermined intervals in the longitudinal direction of the columns 2 and A plurality of steps 3 are connected to each other, and the luminous body 5 is provided on the tread surface 3A of the step 3. Thus, after the lights are turned off at night or in the dim light, the position of the step bar 3 can be confirmed by the light-emitting body 5 emitting light, and the ladder can be easily used.

A second concrete means for solving the problem in the present invention is that, in addition to the first concrete means, each of the right and left columns 2
An end cover 6 for covering the end of the tread 3 is provided between the end of each step 3 and the end of each tread 3, and the end of the light emitting body 5 protrudes into the end cover 6. is there. As a result, the end of the light emitting body 5 can be cleaned well, no stepping force is directly applied to the light emitting body 5, it is possible to prevent the light emitting body 5 from being detached from the stepping bar 3 or to be damaged, thereby improving the durability and emitting light. The length setting of the body 5 becomes rough.

A third concrete means for solving the problem in the present invention is, in addition to the first or second concrete means, a groove along the longitudinal direction of the tread 3 on the tread surface 3A of the tread 3. 7
Is formed, and the luminous body 5 is inserted into the groove 7.
Is set lower than the tread surface 3A.
This facilitates the mounting of the light emitting body 5 on the stepping bar 3 and prevents the light emitting body 5 from being directly applied with a stepping force, preventing the light emitting unit 5 from being detached from the stepping bar 3 or being damaged, and improving the durability. can do.

The fourth concrete means for solving the problems in the present invention is the above-mentioned stepping bar 3 in addition to the third concrete means.
The groove 7 is formed in a substantially dovetail shape, and a substantially dovetailed retaining protrusion 5B is formed in the light-emitting body 5 so that the groove 7 can be inserted into the groove 7 in the groove extending direction or can be pushed in from the groove opening direction. It is that you are. This facilitates attachment and detachment of the light-emitting body 5 to and from the step bar 3 and enables replacement of the light-emitting body 5. A fifth concrete means for solving the problem in the present invention is to form a step bar 3 with a hollow member, cover both ends of the step bar 3 with an end cover 6, and make a plurality of steps parallel to each other at intervals. A pair of right and left columns 2 are disposed on both ends of the stepping bar 3 and are fixed to the stepping bar 3 with the end cover 6 interposed therebetween.
B and a groove 7 deeper than the non-slip recess 3B. The groove 7 is formed at both ends along the longitudinal direction of the stepping bar 3 and has a substantially dovetail shape in cross section. A light-emitting body 5 containing a light-emitting agent is provided.
The upper surface 5A of the light-emitting body 5 is set to a depth substantially equal to the depth of the non-slip concave portion 3B, and a fitting concave portion 6B is formed in the end cover 6 in which both ends of the light emitting body 5 protruding from the step bar 3 can be inserted. That is.

Thus, after the lights are turned off at night, the position of the stepping bar 3 can be reliably recognized in the twilight, the ladder can be easily used, and the light-emitting body 5 can be easily and reliably connected to the stepping bar 3. Can be installed on the
Replacement is possible after preventing separation from the stepping bar 3.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7, the ladder 1 is illustrated as a loft ladder, and a mezzanine room having a loft floor F2 is provided inside a room having a lower floor F1, and a space between the floors F1 and F2 is a wall surface. In order to move between the mezzanine room and the downstairs room, the ladder 1 is installed so as to be changeable in use and storage. The ladder 1 includes a pair of left and right columns 2 formed of a channel material, and the left and right columns 2 are connected to each other by a plurality of steps 3 arranged at predetermined intervals in the longitudinal direction of the columns 2. A handrail 4 made of a hollow tube is provided at the upper part of the second handrail 2.

Hooks 15A and 15B are fixed to the left and right columns 2 at the upper end and the middle of the surface on the side of the wall surface W, and a hook rod 16 of a hook 16 provided on the upper surface of the wall surface W is provided.
A is detachable. As shown in FIG. 1, when the upper hook 15 </ b> A is hooked on the hook bar 16 </ b> A, and the lower end of the support 2 is grounded on the floor F <b> 1, the ladder 1 is in a leaning leaning use posture and the mezzanine room It is possible for a person to move up and down between the room and the downstairs room. As shown by a two-dot chain line in FIG. 1, the inclination angle of the ladder 1 changes according to the distance from the lower floor F1 to the hanging bar 16A.

As shown in FIG. 2, when the lower hook 15B is hooked on the hook bar 16A and the lower end of the column 2 is brought into contact with the wall surface W, the ladder 1 hangs down substantially along the wall surface W. The storage position is achieved, and the occupied area in the lower floor room can be minimized. Each of the left and right columns 2 is formed in a channel shape having a U-shaped cross section with an aluminum alloy or another material, and the internal groove (cavity) thereof is opened left and right outward to form an outer open groove 2A. A side cover 13 made of plastic or the like is fitted so as to close the outer open groove 2A.

An upper end cover 8 is provided at the upper end of each column 2, and a non-slip shoe 9 is provided at the lower end.
The step bar 3 is formed by extruding an aluminum alloy or other material into a hollow shape and cutting it into required dimensions. The upper surface is a substantially flat tread surface 3A, and the lower surface is an arc surface. I have. The tread surface 3A is positioned substantially horizontally when the ladder 1 is in the use posture. The tread surface 3 of this tread 3
A is provided with a luminous body 5 containing (mixing) a luminous agent such as a fluorescent paint or a luminous paint (pigment) along its longitudinal direction, and emits light even in twilight after being turned off at night. The light emission of allows the presence position of the step bar 3 to be clearly recognized.

Both ends of the step bar 3 are covered and covered with end covers 6. The end cover 6 is made of plastic or an aluminum alloy or the like. The end cover 6 is integrally formed with a spigot portion 6B that fits into the step bar 3 and has a fitting portion 6C that fits into the support column 2. The inlay portions 6B of the end cover 6 are fitted and attached to both ends of the step bar 3, and the fitting portions 6C of the left and right end covers 6 are fitted into the left and right columns 2 from inside, and the screws 14 are inserted from the columns 2 side. Then, the step bar 3 is attached to the left and right columns 2 so as to penetrate the end cover 6 and screw into the step bar 3 so as to sandwich the end cover 6 between the column 2 and the step bar 3.

The handrail 4 is formed of a hollow tube (pipe material), the upper end of which is connected to the upper end of the column 2 via a bracket 12a. After extending downward in parallel with 2, it is inclined so as to approach the column 2, and the lower end is bent so as to be orthogonal to the longitudinal direction of the column 2, and the lower end is connected to the intermediate portion of the column via the bracket 12 b. I have. The upper part of this handrail 4 protrudes upward from the support 2, and the ladder 1 is attached to the hanging body 1.
In the state of being hung on the floor 6, it protrudes upward from the loft floor F2, and can be gripped even when a person places his or her feet on the loft floor F2. This makes it easier to move between the upper part of the ladder 1 and the loft floor F2.

4 to 13, the step bar 3 has an arc-shaped lower surface while the tread surface 3A on the upper surface is substantially flat, and has a hollow interior and is divided into three chambers by two ribs 3C. Each of the ribs 3C has a screw hole 3D at each end on which the screw 14 is screwed. Tread surface 3
A has a non-slip recess 3B along the longitudinal direction (left-right direction).
Are formed in the front-rear direction, and a groove 7 is formed in parallel with the non-slip recess 3B.
Is arranged.

The luminous body 5 provided on the tread surface 3A of the step bar 3 is formed in a long rod shape by containing (mixing) a luminescent agent such as a fluorescent paint or a phosphorescent paint in plastic, and is turned off at night. It is possible to store light for a while later, or to emit fluorescent light in a dim light, so that the position of the step 3 can be confirmed. The groove 7 is located on the side where the person goes up and down rather than the wall surface W side, and as shown in FIG. 1, when the ladder 1 is leaned against the wall surface W, as viewed from above the ladder 1, The luminous body 5 of the lower step bar 3 is arranged so as not to be hidden, that is, at a position where the luminous body 5 can be visually recognized.

The groove 7 is not formed by cutting the tread surface 3A, but is a concave portion having a bottom. A narrow portion 7A is formed by forming a convex portion in the middle of the groove in the depth direction. The light-emitting body 5 is also formed with a burrow-shaped portion at the lower portion, and a retaining protrusion 5B having a substantially dovetail shape is formed. The light-emitting body 5 having such a shape is inserted into the groove 7 from the left and right ends of the stepping bar 3 or pushed from above the groove 7 (groove opening direction) so as to be orthogonal to the groove 7. 7, the attachment and detachment of the luminous body 5 from the step bar 3 is facilitated, and the luminous body 5 can be replaced.

The upper surface 5A of the light-emitting body 5 in the mounted state is the tread surface 3.
A, one step lower than A, and approximately the same depth or deeper than the bottom surface of the non-slip concave portion 3B. Even when a person climbs or lifts on the tread surface 3A, the upper surface of the light-emitting body 5 is not stepped on, and is worn , So that it is not damaged. That is, it is easy to mount the luminous body 5 on the step bar 3 and the luminous body 5
The mounting structure is such that the stepping force is applied directly to the stepping bar 3 to prevent it from being detached from the stepping bar 3 or being damaged.

At the left and right ends of the stepping bar 3, right and left columns 2 are provided.
An end cover 6 is fitted to hide the internal cavity between the end cover 6 and the end cover 6. The end cover 6 is made of an aluminum alloy or plastic, and has an inner surface integrally formed with an inlay portion 6B that fits into the end of the step bar 3, and an outer surface with a support 2 on the outer surface.
A screw 1 is inserted from the column 2 side so as to be sandwiched between the end of the step bar 3 and the column 2.
4 is attached by screwing it into a screw hole 3D of the stepping bar 3, thereby connecting the left and right columns 2 with a number of parallel stepping bars 3.

The length of the light emitting body 5 is set longer than that of the stepping bar 3, and the end protruding from the stepping bar 3 protrudes into the end cover 6. For this reason, the end cover 6
Is formed with a fitting recess 6A for inserting the end of the light emitting body 5. By inserting the end of the light emitting body 5 into the fitting recess 6A of the end cover 6, the end of the light emitting body 5 can be cleaned up properly, and the light emitting body 5 can be prevented from being detached from the step bar 3. At the same time, the length setting of the light emitting body 5 becomes rough. In addition,
The present invention is not limited to the above embodiment, and can be variously modified. For example, the luminous body 5 may be one in which a fluorescent paint or a phosphorescent paint is applied to the bottom surface of a transparent plastic rod, or a sheet in which a pigment containing these paints is adhered may be mounted in the groove 7. Further, the retaining projection 5B of the light emitting body 5 can be formed in various shapes, and may not be long but may have a plurality of partial projections.

[0022]

According to the present invention described in detail above, after the lights are turned off at night, the position of the step bar 3 can be confirmed by the luminous body 5 emitting light in a dim light, and the ladder can be easily used. In other words, the light-emitting body 5 can be easily and reliably mounted on the stepping bar 3, and can be replaced while preventing detachment from the stepping bar 3.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a use state showing an embodiment of the present invention.

FIG. 2 is a schematic side view of the storage state.

FIG. 3 is a schematic front view of the same.

FIG. 4 is a side view of the upper part of the ladder.

FIG. 5 is a front view of the upper part of the ladder.

FIG. 6 is a sectional view taken along the line PP of FIG. 5;

FIG. 7 is a partially enlarged view of FIG. 6;

FIG. 8 is a plan view of a step bar.

FIG. 9 is a sectional view of a step bar.

FIG. 10 is an enlarged cross-sectional view of a light emitting body mounting portion of a step bar.

FIG. 11 is a plan view of an end cover.

FIG. 12 is a side view of the end cover.

FIG. 13 is a front view of the end cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladder 2 Prop 2A Outer open groove 3 Step bar 3A Tread surface 3B Non-slip recess 4 Handrail 5 Light emitter 5A Upper surface 5B Retaining protrusion 6 End cover 6A Fitting recess 7 Groove 13 Side cover

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshio Tsumura 1048 Kazuma Kadoma, Osaka Pref.Matsushita Electric Works, Ltd. (72) Inventor Kenichi Hosokawa 1048 Kadoma Kadoma, Kadoma, Osaka Pref.Matsushita Electric Works Co., Ltd. (72) Inventor Harano Chika 4-170 Nagatanaka, Higashiosaka City, Osaka Prefecture F term in Pika Corporation (reference) 2E044 AA01 BA01 CB03 CC01 DA02 DB01 EE06 EE17

Claims (5)

[Claims] An illuminator is provided on a tread surface of a pair of left and right supports and a plurality of steps which are arranged at predetermined intervals in a longitudinal direction of the supports and connect the supports to each other. A ladder characterized by being provided. 2. An end cover for covering an end of the step beam is provided between each of the left and right struts and an end of each step beam, and the end of the luminous body protrudes into the end cover. The ladder according to claim 1, wherein 3. The method according to claim 1, wherein a groove is formed on the tread surface of the tread along the longitudinal direction of the tread, a luminous body is inserted into the groove, and the upper surface of the luminous body is set lower than the tread surface. The ladder according to claim 1 or 2, characterized in that: 4. A step groove is formed in a substantially dovetail shape,
4. The ladder according to claim 3, wherein the illuminator has a substantially dovetail-shaped retaining protrusion that can be inserted into the groove from the groove extending direction or pushed into the groove from the groove opening direction. 5. A step beam is formed by a hollow member, and both ends of the step beam are covered with an end cover and are arranged in parallel with each other at a plurality of intervals. Are arranged and fixed to the step rail with the end cover interposed therebetween. A non-slip recess and a groove deeper than the non-slip recess are formed on the tread surface of the step rail, and the groove is formed in the longitudinal direction of the step rail. Along the both ends and formed in a substantially dovetail shape in cross-section, a luminous body containing a luminescent agent is provided in the groove over the entire length, provided with a retaining protrusion having a generally dovetail shape in cross-section to the luminous body, The upper surface of the light emitter is set to a depth substantially equal to the depth of the non-slip recess, and the end cover is formed with a fitting recess into which both ends of the light emitter protruding from the step rail can be inserted. And a ladder.