JP2002274270A - Elevating ladder inside cab of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply attach a ladder to and detach from a passenger seat 20 and make elevation to a bed 32 possible. SOLUTION: This ladder 40 is arranged in the lower region of an entrance and exit of the bed 32 inside the cab 100, and detachably attached to the passenger seat 20 equipped with a head rest 23. The ladder 40 has a frame body 42 and a stem member 44. The frame body 42 has a pair of side supports, an upper lateral support 42b, and a lower lateral support 42c. The step member 44 is supported with the side supports. The upper lateral support 42b of the frame body 42 is positioned in the rear of the head rest 23, the side supports 42a are positioned in the front of back rest part 22 of the passenger seat 20, the lower lateral support 42c is placed on the seat surface 21a of the passenger seat 20, and thereby, the ladder is attached to and detached from the passenger seat 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder for raising and lowering a cab of a vehicle, for example, a heavy-duty truck, and more particularly to a cab having a headrest disposed in a region below a doorway of a bed arranged in a ceiling space in the cab. The present invention relates to a ladder for raising and lowering in a cab which can be detachably mounted on a seat and used.

[0002]

2. Description of the Related Art A vehicle, for example, a large truck used for long-distance transportation or the like, has been put into practical use in which a bed for resting occupants such as a driver or an assistant is arranged in a ceiling space in a cab. I have. This type of heavy truck is provided with a ladder for an occupant to climb a bed. This ladder is generally fixed at or near the rear position of the passenger seat in the cab.

[0003]

The above ladder is essential when an occupant climbs a bed. However, when the ladder is not in use, the ladder may be obstructed when the ladder is not in use. Or, in order to fix the ladder at a predetermined position, it is necessary to modify the cab, which increases the cost.

[0004] It is an object of the present invention to be able to be easily attached to an existing seat when in use, to easily climb up to a bed arranged in a ceiling space in a cab, and to be used when the seat is not in use. It is an object of the present invention to provide a new vehicle cab lift ladder that can be easily disengaged and easily moved out of the way of the occupants.

Another object of the present invention is to make it possible to easily climb a bed located in a ceiling space inside a cab as required without making any modifications to the cab, The purpose of the present invention is to provide a ladder for raising and lowering a new vehicle in a cab, which enables cost reduction.

[0006]

According to the present invention, a detachable seat is provided in a seat provided with a headrest in a region below a doorway of a bed arranged in a ceiling space in a cab. A ladder for raising and lowering in a cab of a vehicle, comprising: a frame; and at least one ladder mounted on the frame.
The frame body comprises a pair of side supports extending at an interval from each other, an upper horizontal support connecting the upper ends of the side supports, and a lower horizontal support connecting the lower ends of the side supports. And a step member, wherein the step member is supported by each of the side columns so as to project from each of the side columns to one side thereof, and the upper end of the side column retreats to the other side in the direction opposite to the direction in which the step member projects. The upper lateral support is positioned at the rear of the headrest such that the upper end of the frame is wound around the headrest, and the other side of the side support of the frame is positioned at the front of the seat back. And a ladder for raising and lowering in a cab of a vehicle, wherein the lower horizontal support of the frame body is mounted on a seating surface of the seat so as to be detachably mounted on the seat.

[0007] It is preferable that the lower horizontal support is composed of a plate member projecting to one side of each of the side supports. The shape of each of the side supports is such that each of the side supports of the frame body is positioned along the front surface and the upper end surface of the back support portion of the seat in a state where the support is detachably mounted on the seat. Preferably, it is defined so as to substantially match the shape of the upper end surface. It is preferable that each of the side supports of the frame is configured to be extendable and contractible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a ladder for raising and lowering in a cab of a vehicle constituted according to the present invention will be described below in detail with reference to the accompanying drawings. Referring to FIG. 1, the cab of a large truck, generally designated by the numeral 100, has a floor 2,
The vehicle includes a front wall 4, a rear wall (rear panel) 6, a roof panel 8, a pair of side walls 10, and the like. The side wall 10 shown in FIG. 1 shows the left side wall 10 located on the left side in the forward direction of the heavy truck. An opening 12 for getting on and off is formed in the left side wall 10, and is configured to be opened and closed by a door 14. On the front wall 4, a console box 16, a front window glass 17, an overhead console 18, and the like are installed. A driver's seat and a passenger seat 20 (not shown), which are seats, are provided on the floor 2. The passenger seat 20 includes a seating portion 21, a back support portion 22, and a headrest 23 mounted on an upper end of the back support portion 22. A ceiling partition wall 30 is provided between the overhead console 18 and the rear wall 6 to partition the inside of the cab 100 up and down to form a bed space in the ceiling space of the cab 100. A bed 32 is arranged above the ceiling partition wall 30. An entrance 34 is formed at the left end of the ceiling partition 30 and the bed 32 in the forward direction of the large truck.
The passenger seat 20 is arranged in a region below the entrance 34 of the bed 32.

Next, a description will be given of a ladder 40 which can be detachably mounted on the passenger seat 20 and used.
Referring to FIGS. 1 to 3, ladder 40 includes a frame 42 and at least one step member 4 mounted on frame 42.
4, two step members 44 in the illustrated embodiment
It is composed of The frame body 42 includes a pair of side supports 42 a extending substantially parallel to each other at intervals and a side support 4.
An upper horizontal support 42b connecting the upper ends of the upper support 2a and a side support 42
and a lower horizontal column 42c connecting the lower ends of the columns a.
The frame body 42 having such a configuration is formed in a loop shape from a metal hollow pipe having a circular cross section.
Each of the step members 44 having the same shape as each other is connected to the side support 4.
Each of the side columns 42a is integrally supported by each of the side columns 42a so as to project from one of the side columns 42a to one side (the right side in FIG. 1) of each of the side columns 42a. In the illustrated embodiment, each of the step members 44 is formed into a hollow rectangular shape by combining steel plates, and is supported by being fixed to each of the side columns 42a by welding. The upper end of the side support 42a is bent (curved) so as to retreat to the other side (the left side in FIG. 1) of the step member 44 in the direction opposite to the extending direction.

The ladder 40 constructed as described above, when in use, has the curved upper end of the frame body 42 wound around the headrest 23 of the passenger seat 20 from behind, and the upper horizontal support 42b Are positioned at the rear of the headrest 23 of the passenger seat 20, and the other side of the side support 42 a of the frame 42 is positioned at the front side (the right side in FIG. 1) of the back support 22 of the passenger seat 20, and the frame 4
The lower horizontal support 42 c is mounted on the seating surface 21 a of the seating portion 21 of the passenger seat 20 so as to be detachably attached to the passenger seat 20. In this configuration, the ladder 40 is connected to the passenger seat 20.
It contributes to stable mounting. Ladder 4
0 is attached to the passenger seat 20 as described above, each of the side supports 42a of the frame 42 is
The shape of each of the side columns 42a is defined so as to substantially match the shape of the front surface 22a and the upper end surface 22b of the back support portion 22 so as to be positioned along the front surface 22a and the upper end surface 22b of the back support portion 22. This configuration also contributes to the stable mounting of the ladder 40 on the passenger seat 20. Also, the ladder 40 has the passenger seat 2 as described above.
In a state where the step member 44 is mounted at 0, the upper surface of each of the step members 44 is positioned substantially horizontally. Since the passenger seat 20 is arranged in a region below the entrance 34 of the bed 32, the step member 44 is located at a position suitable for climbing toward the entrance 34. As a result, an occupant such as a driver can easily and safely climb (up and down) on the bed 32 existing in the ceiling space by using the ladder 40 mounted on the passenger seat 20.

As is clear from the above description, the ladder 40
Is formed in a loop shape, and can be detachably attached to the passenger seat 20 by a simple operation of being hooked on the rear part of the headrest 23 of the passenger seat 20. This is practically useful because it can be easily mounted on the bed 32 arranged in the ceiling space in the cab 100. When not in use, the ladder 40 can be moved substantially upward with respect to the passenger seat 20 by a simple operation.
0 can be easily separated from the vehicle, and can be easily moved to a place where it does not interfere with the occupant, which is practically useful. The ladder 40 is a cab 100
It is possible to easily climb up to the bed 32 arranged in the ceiling space inside the cab 100 as necessary without any modification to the cab 100, and as a result, to reduce the cost. . Furthermore, the construction of the ladder 40 is simple and can therefore be manufactured at relatively low cost. When each of the frame body 42 and the step member 44 of the ladder 40 is made of a light metal such as aluminum, the ladder 40 can be further lightened and a predetermined strength can be sufficiently secured. Operation or movement is further facilitated.

The ladder for raising and lowering the cab of a vehicle according to the present invention has been described in detail based on the embodiments with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and the present invention is not limited thereto. Various other variations or modifications can be made without departing from the scope of the above. For example, in the above embodiment, the lower horizontal support 42c of the ladder 40 is
It is formed by a hollow pipe made of metal. Instead of this, for example, as shown in FIG.
There is also another embodiment comprising a plate member 46 extending from each of the side supports 42a to the one side of each of the side columns 42a. According to this configuration, the plate member 46 is stably mounted on the seating surface 21 a of the seating portion 21 of the passenger seat 20 in a state where the ladder 40 is mounted on the passenger seat 20, so that the entire ladder 40 is placed on the passenger seat 20. It is mounted more stably.

In the above-described embodiment, the ladder 40 has a constant length. However, there are other embodiments in which the ladder 40 can be extended and contracted in the longitudinal direction. For example, in another embodiment shown in FIG. 5, the side support 42a of the frame body 42 is replaced with the side support 42 on the upper horizontal support 42b side.
0b and a side support 420c on the side of the lower horizontal support 42c. And the side support 420b on the upper horizontal support 42b side
Is formed larger than the outer diameter of the side column 420c on the side of the lower horizontal column 42c, and the upper end of the side column 420c is fitted in the lower end of the side column 420b so as to be slidable in the axial direction. Are configured so as to be releasably locked to each other at a predetermined relative position in the axial direction. In the side supports 420b and the side supports 420c that can be fitted to each other, through holes that can be mutually aligned in the axial direction are formed at predetermined intervals. As a result, the side support 420b and the side support 420
"c" means that it can be freely extended and contracted in the axial direction, that is, in the longitudinal direction, and can be releasably locked to a predetermined length by the screw member 48. According to this embodiment, the ladder 40
Can be set in accordance with the length of the back support 22 of the passenger seat 20, so that one ladder 40 can be used for the passenger seats 20 having different specifications.

Further, in the illustrated embodiment, an entrance 34 is formed at the left end of the ceiling partition wall 30 and the bed 32 in the forward direction of the large truck, and the passenger seat 20 is located below the entrance 34 of the bed 32. Due to the position, the ladder 40 is attached to and detached from the passenger seat 20. However, whether or not it is practically possible, if the entrance 34 is formed at the right end in the forward direction of the heavy truck, it goes without saying that the ladder 40 is attached to and detached from the driver's seat. .

[0015]

According to the ladder for raising and lowering in a cab of a vehicle according to the present invention, the ladder can be easily mounted on an existing seat when used, and easily climbs to a bed arranged in a ceiling space in the cab. And can be easily removed from the seat when not in use, making it easy to move to a place where it does not interfere with the occupant. In addition, it is possible to easily climb a bed arranged in a ceiling space in the cab as needed without making any modification to the cab, thereby enabling cost reduction.

[Brief description of the drawings]

FIG. 1 is a schematic structural view of a cab of a large truck having a ladder constructed according to the present invention, which is mounted on a passenger seat, viewed from the side.

FIG. 2 is a perspective view showing a state in which a ladder constructed according to the present invention is mounted on a passenger seat (the state shown in FIG. 1).

FIG. 3 is a perspective view of a state in which a ladder constructed according to the present invention is mounted on a passenger seat, as viewed obliquely from the rear of the passenger seat.

FIG. 4 is a perspective view showing another embodiment of a ladder constructed according to the present invention.

FIG. 5 is a side view showing another embodiment of a ladder constructed according to the present invention.

[Explanation of symbols]

 Reference Signs List 20 passenger seat 21 seating portion 21a seating surface 22 back support portion 22a front surface of back support portion 22b upper end surface of back support portion 23 headrest 30 ceiling partition wall 32 bed 34 doorway 40 ladder 42 frame 42a side support 42b upper horizontal support 42c lower Horizontal support 44 Step member 46 Plate member 100 Cab

Continued on the front page (72) Inventor Masayoshi Kumazawa 1818 Endo 2023 Endo, Fujisawa-shi, Kanagawa Inside the Shonan Development Center, Inc. F term (reference) 3D022 AA01 AA04 AC03 AE03

Claims (4)

[Claims] 1. A ladder for ascending and descending in a cab of a vehicle, which is disposed in an area below a doorway of a bed disposed in a ceiling space in a cab and can be detachably mounted on a seat provided with a headrest. The frame includes a frame and at least one step member attached to the frame. The frame connects a pair of side supports extending at an interval from each other and an upper end of the side support. An upper horizontal support and a lower horizontal support connecting the lower ends of the side supports are provided, and the step member is supported by each of the side supports so as to project from each of the side supports to one side thereof, and the upper end of the side support is The upper side support is positioned at the rear of the headrest so that the upper end of the frame is wound around the headrest, and the side support of the frame is The other side of the seat is the back of the seat A ladder for ascending and descending in a cab of a vehicle, wherein the ladder is positioned at a front side of a receiving portion, and is detachably mounted on a seat by placing a lower horizontal support of the frame on a seating surface of the seat. 2. The ladder for raising and lowering in a cab of a vehicle according to claim 1, wherein the lower horizontal support is formed of a plate member projecting to one side of each of the side supports. 3. The shape of each of the side supports is such that each of the side supports of the frame body is positioned along the front surface and the upper end surface of the back support portion of the seat when detachably mounted on the seat. 3. The ladder for raising and lowering in a cab of a vehicle according to claim 1, wherein the ladder is defined so as to substantially conform to shapes of a front surface and an upper end surface of the receiving portion. 4. The ladder for raising and lowering in a cab of a vehicle according to claim 1, wherein each of the side supports of the frame is configured to be extendable and contractible.