JPH11235951A - Vehicle ladder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide easy attachment and prevent local load from being applied to the mounted part of a back door. SOLUTION: This ladder device consists of a ladder body 1 having a plurality of steps, an upper holder 2 which is provided on the upper part of the ladder body 1 and is mounted so as to be capable of relative rotation to the ladder body 1 in the three-dimensional direction, a lower holder 3 which is provided under the ladder body 1 and is mounted so as to be capable of relative rotation within a plane forming the ladder body 1, a puller mechanism 5 which is provided under the ladder body 1 and operates so as to draw the lower holder 3 in the longitudinal direction of the ladder body 1, and a locking device 6 which is provided at the upper holder 2 and regulates the oscillating movement of the upper holder 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder to be attached to a back door of a leisure beer (RV vehicle) or the like.
The present invention relates to a vehicle ladder capable of improving the simplicity of the mounting work and the mounting accuracy.

[0002]

2. Description of the Related Art As shown in FIG. 5, for example, a conventional vehicle ladder is such that a ladder body 10 is attached to a back door 90 via hook-shaped holders 20 and 30 provided at upper and lower ends thereof. Is what it is. When mounting via the holders 20 and 30, first, the hooks formed at the upper and lower holders 20 and 30 are engaged with the upper and lower ends of the back door 90. In the state where each holder 2
By adjusting each adjuster 210, 210 ', 310, 310' provided between 0, 30 and the ladder main body 10,
The ladder body 10 is provided with a tensile force (tension) in the vertical direction. The ladder main body 10 is fixed to the back door 90 by the tension in the vertical direction, and functions integrally with the back door 90.

[0003]

By the way, in the above-mentioned conventional device, when the ladder main body 10 is attached to the back door 90, the upper and lower holders 20, 30 are provided in order to apply a predetermined tension to the ladder main body 10. Adjusters 210, 210 ', 310, 310' provided at
Must be adjusted respectively. This adjustment work is performed by the four adjusters 210, 210 ', and 31.
0, 310 'little by little and each adjuster 21
It must be done so that the tightening at 0, 210 ', 310, 310' is even. And if any one is strongly tightened, each holder 20,
There is a possibility that the engagement state between the hook portion provided on any one of the 30 and the terminal portion of the door 90 becomes excessive, and a part of the door 90 in this portion may be deformed. In consideration of the above, the adjuster 21
The adjustment work (tightening work) of 0, 210 ', 310, 310' must be performed little by little and carefully, and the work of attaching the ladder body 10 must be complicated. In order to solve such a problem, all the joints between each holder and the ladder main body should be of a pin joint connection type, and a puller mechanism should be provided at one end of the ladder main body. By operating this puller mechanism, it is possible to generate a predetermined tension in the rudder main body, and to provide a vehicle ladder that is easy to attach and detach.
It is an object (problem) of the present invention.

[0004]

Means for Solving the Problems In order to solve the above problems, the present invention takes the following measures. That is, according to the first aspect of the present invention, a vehicle ladder that is attached to a back door or the like and that is detachably formed has a ladder body having a plurality of steps and an uppermost end of the ladder body. A bracket attached so as to be capable of swinging movement in a plane formed by the ladder main body, and a hinge connected to the bracket, and a hook is provided at a tip portion of the bracket. An upper holder comprising a hook member provided so as to be capable of relative movement in the three-dimensional direction with respect to the ladder main body, and provided on one end side of the ladder main body. A puller mechanism that serves to draw the upper holder and the lower holder to the center, and the ladder body by the operation of the puller mechanism A slide member that is drawn toward the central portion and that slides in the longitudinal direction of the ladder main body along a guide portion provided on the ladder main body, and is capable of rotating relative to the slide member. And a lower holder formed by a hook member having a hook portion at a tip portion thereof, while the rotating motion is formed in the same plane as the surface of the ladder main body. The following configuration was adopted.

[0005] By adopting such a configuration, in the case of the present invention, the work of mounting the vehicle ladder to the back door can be performed easily and accurately. That is, when mounting the vehicle ladder, first, the hooks of the holders provided at the upper and lower ends of the ladder main body are hooked on the upper edge and the lower edge of the back door. In such a state, by operating a puller mechanism provided on either one of the upper and lower ends of the ladder main body, both holders provided on the upper and lower ends of the ladder main body are drawn, and provided on the holder. Attach a tensile force (tension) to the hook. As a result, the upper and lower hooks engage with the upper edge and the lower edge of the back door, respectively, and are firmly coupled to the back door. That is, the ladder device is attached to the back door.

As described above, according to the present invention, the ladder main body is centered, and the upper and lower ends thereof can be rotated relative to the ladder main body (oscillating motion). It is formed and provided with a holder in the form of a balance (balancer) model, and further, through two hooks provided at the tip of the holder formed in the balance state. Since the ladder body can be attached to the back door,
By operating the puller mechanism provided at one place of the ladder main body, it becomes possible to apply a uniform pulling force to each hook provided at the upper and lower ends.
That is, by applying a predetermined tension to the ladder main body, this tension (tensile force) is evenly distributed to the upper and lower hook portions, and each hook portion and the back door edge portion have an equal position. It becomes engaged in a state. Therefore, due to the operation of the puller mechanism, in a state where the ladder device is attached to the back door, the engagement portion between any one of the back door edge and the hook portion is excessively moved toward the back door edge. The load (load) is not applied, and the deformation of the edge of the back door can be prevented. Further, the engagement in such a uniform load state, that is, the mounting of the ladder device is performed with a relatively simple operation and with high accuracy.

Next, the invention according to claim 2 will be described. This is also basically the same as the first aspect. The feature is that the upper holder provided at the upper end of the ladder main body is such that the upper holder does not make a relative swinging motion with the ladder main body when the ladder main body is attached to the back door. A lock device is provided at a connecting portion between the upper holder and the ladder main body. That is, after engaging the respective hooks of the holder provided at the upper and lower ends with the upper and lower edges of the back door, and operating the puller mechanism to couple the ladder main body to the back door side, Activate the locking device provided at the upper holder. By such a series of operations, the entire ladder device is attached to the back door via the hooks under a uniform load. Further, such a state is fixed by the operation of the lock device. That is, by the operation of the lock device, the upper holder and the upper end of the ladder main body are fixed in a state where relative swinging movement is impossible, and each hook portion provided at the distal end of the upper holder is fixed. The engagement state between the rear door and the upper edge of the back door does not shift.
As a result, a stable attachment state of the ladder device to the back door is maintained.

Next, the invention according to claim 3 will be described. This is also basically the same as the first aspect. The feature is that the puller mechanism serving to pull the upper holder and the lower holder toward the center of the ladder main body is made of a screw system. That is, the present invention relates to claim 1
In the vehicle ladder described above, a puller mechanism provided on one end side of the ladder main body is provided on a bolt provided rotatably on the cross member side, and provided on the slide member. A female screw part which is screw-coupled to a male screw part of the bolt is provided. By adopting such a configuration, according to the present invention, first, after engaging the hook portions formed at the upper and lower holders with the upper and lower edges of the back door, Turn (turn) the bolt. On the other hand, since the rotation of the slide member having the female screw portion to be screw-coupled to the male screw portion of the bolt is stopped by the guide portion provided on the ladder main body, the slide member is restricted by the rotation of the bolt. Accordingly, it moves in the vertical direction (longitudinal direction of the ladder main body) along the guide portion. By moving the ladder body in the longitudinal direction,
Tension is applied to the ladder main body, and accordingly, a uniform tensile force (tension) is applied to each hook portion provided on each of the upper and lower holders.

As a result, the engagement between the hooks and the edge of the back door becomes strong, and the ladder main body, that is, the entire ladder device is firmly connected to the back door. In applying such a pulling force (tension), the puller mechanism is composed of a screw mechanism, and the load applied to each hook portion is gently performed. There is no possibility that an excessive load (load) is applied only to the hook portion.
Therefore, a load (tension) is applied equally to all the hook portions, whereby the ladder main body is fixed to the back door. Further, in order to remove the looseness (looseness) of the ladder device thus mounted after use, retightening work is performed. In this case, the loosening is performed by retightening the bolt. Removal can be performed easily.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Although related to the embodiment of the present invention, as shown in FIG. 1, the configuration is such that a ladder main body 1 having a plurality of steps and an upper end portion of the ladder main body 1 are provided. Upper holder 2 attached so as to be capable of relative rotational movement (oscillating movement) in three-dimensional directions, and the ladder main body 1
Ladder main body 1
And a lower holder 3 provided so as to be able to perform a relative rotational movement in a plane formed by the lower holder 3 and a lower end provided at one end side of the ladder main body 1. A puller mechanism 5 that operates to pull in the longitudinal direction of the ladder body 1;
And a lock device 6 for restricting the upper holder 2 from swinging freely with respect to an upper end portion of the ladder main body 1. It is based on that.

As shown in FIGS. 1 and 2, the ladder main body 1 has a ladder-like shape as a whole, and has two side frames 19 and a ladder body provided between them. And a plurality of cross members 11 and 11 ′ forming steps, which are integrally formed of an aluminum alloy pipe material or the like except for the lowermost cross member. Is what it is. The cross member (11) provided at the lowermost step (the lowermost end) of the cross members having these configurations forms the ladder main body 1 by fastening means (not shown) including bolts and nuts. It is designed to be attached to the lower part of the side frame 19 to be mounted. The lowermost cross member 11
Is provided with a puller mechanism 5, and the lower holder 3 is attached via the puller mechanism 5. Further, both side frames 19 forming such a ladder main body 1 are formed.
The ladder body 1 is located at each lower end.
The arm 4 is provided so as to be capable of performing a relative rotational movement in a plane perpendicular to the plane formed by the arm 4. The base portion 44 of the arm 4 comes into contact with the outer plate surface of the back door 9 when the ladder device is mounted.

As shown in FIGS. 1 and 2, the upper holder 2 provided at the upper end of the ladder main body 1 having such a configuration and engaging with the upper end edge of the back door 9 is provided at the upper end of the ladder main body 1. The part forms a balance (balancer) so that relative rotational movement (oscillating movement) is possible in the same plane as the surface formed by the ladder main body 1 and the whole is supported by its mounting point. And a hinge 21 (O ₂ O ₂ ) formed at both ends of the bracket 21 in a plane perpendicular to the plane formed by the ladder main body 1. A hook member 22 which is attached so as to be capable of dynamic movement (joined by hinges) and has a hook portion 229 which engages with an upper edge of the back door 9 at a tip end thereof. Based on Is shall. By adopting such a configuration, the upper holder 2 can perform a relative rotational movement in the three-dimensional direction with respect to the ladder main body 1. As shown in FIGS. 1 and 2, two hook portions 229 are provided side by side, and these two hook portions 229 are provided via the bracket 21 forming the balancer. Ladder body 1
The load (tensile force) from the side is transmitted in a similar state.

The upper holder 2 having such a configuration
However, a lock device 6 is provided at a portion connected to the ladder main body 1. As shown in FIGS. 1 and 3, the lock device 6 includes a bolt (lock bolt) 61 that forms a fulcrum of a swinging motion of the upper holder 2 with respect to the ladder main body 1, and a screw connection with a male screw portion of the lock bolt 61. A female screw portion 21 provided at the center of the beam portion of the bracket 21.
6 as a basis. And
In such a basic configuration, a plurality of engaging recesses 211 are formed on the same circumference around the female screw portion 216 of the bracket 21 and at the mounting surface on the ladder main body 1 side. To be provided.
Further, the lock plate 6 is provided on the front surface side of the bracket 21 in which the engagement recess 211 is provided.
6 is provided. And
When the lock bolt 61 is tightened, the lock plate 66 is engaged with the engagement recess 211 of the bracket 21 via a collar 16 for holding the lock bolt 61 provided at the upper end of the ladder body 1. It is designed to be pressed against the surface on which is formed. At this time, the protrusion 666 provided on the surface of the lock plate 66 that is in contact with the bracket 21 is engaged with the engagement recess 211, so that the swinging motion of the upper holder 2 is restricted. Is what it is.

Next, the lower holder 3 provided at the lower end of the ladder main body 1 and engaging with the lower edge of the back door 9 of the ladder main body 1 will be described. This is shown in FIG.
As shown in FIG. 2, the ladder body 1 is attached to the cross member 11 forming the step at the lowermost end portion via the puller mechanism 5 and along the guide portion 55 provided below the side frame 19 forming the ladder main body 1. Ladder body 1
A slide member 31 that slides in the longitudinal direction of the balance member, and a balance member is provided at a substantially central portion of the slide member 31 so that a relative rotational movement is possible within a plane formed by the ladder body 1. Balancer), and two hooks 3 at its tip.
And a hook member 32 having a base 22.

The puller mechanism 5 that operates to pull the lower holder 3 having such a structure upward in the longitudinal direction of the ladder main body 1 has a lower end portion as shown in FIGS. A bolt 51 rotatably provided at the cross member 11 forming the step.
And a female screw portion 315 which is screw-connected to the male screw portion of the bolt 51 and is provided at the upper end of the slide member 31. And
When the bolt 51 is turned, for example, as shown by an arrow in FIG. 2, the slide member 31 forming a slide nut is formed.
Is adapted to move in the vertical direction (longitudinal direction of the ladder main body 1) at the guide portion 55 provided on the ladder main body 1 side. The puller mechanism 5 may be, for example, a buckle mechanism, a toggle joint mechanism, or the like in addition to the above mechanism. In this embodiment, such a puller mechanism 5 is provided on the lower side of the ladder main body 1, that is, on the lower holder 3 side. However, the present invention is not limited to this. May be provided on the upper holder 2 side.

Next, a procedure (mounting procedure) for mounting the ladder device having the above configuration to the back door 9 will be described.
This will be described with reference to FIGS. First, as shown in FIG. 2, an upper holder 2 provided at the upper end of the ladder device is provided.
The hook 229 formed at the tip of the back door 9 is engaged with the upper edge of the back door 9. At the same time, the hook 322 formed at the tip of the lower holder 3 provided at the lower end of the ladder device is attached to the attachment 9.
9 to engage the lower edge of the back door 9. Thus, in a state where the ladder device is temporarily engaged with the back door 9, the puller mechanism 5 provided at the lower portion of the ladder main body 1 is operated as shown in FIG. In the present embodiment, as shown in FIGS. 2 and 4, the puller mechanism 5 is provided with a bolt 5 rotatably provided at the lowermost cross member 11.
1 and the female screw portion 315 provided at the upper end of the slide member 31, so that the bolt 51 is rotated (turned) as shown in FIG. Accordingly, the slide member 31 can be pulled up (pulled) along the guide portion 55 provided at the lower portion of the ladder main body 1 upward, which is the longitudinal direction of the ladder main body 1. The hook portion 229 provided on the upper holder 2 is pulled down (pulled) by the reaction of the lower holder 3 with the lifting operation. That is, tension acts on the ladder main body 1, thereby causing the upper and lower hook portions 22 to move.
9 and 322 are pulled to the center, and hold the upper edge and the lower edge of the back door 9 so as to sandwich them from above and below. Thus, the entire ladder device is mounted on the back door 9.

When the ladder main body 1 is attached to the back door 9 in this manner, the locking device 6 provided at the upper holder 2 is operated to fix this state. Specifically, a bolt (lock bolt) 61 provided at the center point of the swinging motion of the bracket 21 forming the upper holder 2 shown in FIGS. 1 and 2 is tightened. Thereby, the female screw portion 216 that is screw-coupled to the male screw portion of the lock bolt 61
Is attracted to the ladder main body 1 side (see FIG. 3). That is, in FIG. 3, the lock bolt 6 provided at the upper end of the ladder main body 1 is used.
The distal end of the collar 16 for holding 1 and the surface of the beam portion of the bracket 21 are brought into close contact with the lock plate 66 interposed therebetween. As a result, the engagement recess 211 formed on the surface of the bracket 21 and the projection 666 formed on the lock plate 66 engage,
The upper holder 2 including the bracket 21 cannot move relative to the ladder main body 1. That is, the upper holder 2 is fixed to the ladder main body 1, and the ladder device in such a state does not shift with respect to the back door 9, and is fixed firmly. Become.

When the ladder device attached to the back door 9 is removed in this manner, the lock bolt 61 is loosened and the bolt 51 of the puller mechanism 5 is reversed to generate the puller mechanism 5. This is done by reducing the pulling force. That is, the engagement relationship between the hook portions 229 and 322 and the upper edge and the lower edge of the back door 9 is relaxed. By opening the back door 9 in such a state, the hook portions 229 and 322 can be removed from the upper edge and the lower edge of the back door 9. As described above, in the present embodiment, the ladder device cannot be completely removed from the back door 9 simply by releasing the fixed state of the lock bolt 61 and the puller mechanism 5, and the back door 9 cannot be removed. The hook portions 229 and 322 cannot be completely removed from the back door 9 unless the door is opened. Therefore, when the back door 9 is closed, the anti-theft function of the ladder device is exhibited.

[0019]

According to the present invention, a ladder main body having a plurality of steps, and a top end portion of the ladder main body, which are mounted on a back door or the like and are detachably formed, are provided. A bracket attached so as to be capable of swinging movement in a plane formed by the ladder main body, and a hinge connected to the bracket, and a hook is provided at a tip portion of the bracket. An upper holder comprising a hook member provided so as to be capable of relative movement in the three-dimensional direction with respect to the ladder main body, and provided on one end side of the ladder main body. A puller mechanism that serves to draw the upper holder and the lower holder to the center, and a center side of the ladder body by the operation of the puller mechanism. A sliding member that slides in a longitudinal direction of the ladder main body along a guide portion provided on the ladder main body, and a relative rotational movement with respect to the slide member is possible, and The rotary motion is formed so as to be performed in the same plane as the surface of the ladder main body, and a lower holder formed by a hook member having a hook portion is provided at a front end thereof. As a result, the work of attaching the vehicle ladder to the back door can be performed easily and accurately.

That is, when mounting the vehicle ladder, first, the hooks of the holders provided at the upper and lower ends of the ladder main body are attached to the upper edge and the lower edge of the back door. And the like, and in such a state, by operating a puller mechanism provided on one of the upper and lower ends of the ladder main body, the two holders provided on the upper and lower ends of the ladder main body are removed. The upper and lower hooks can be engaged with the upper edge and the lower edge of the back door, respectively, and can be firmly connected to the back door. . As described above, according to the present invention, the ladder body is formed at the upper and lower ends so as to be able to perform a relative rotational movement (oscillating movement) with respect to the ladder body. At the same time, a holder in the form of a balance (balancer) model is provided.
Since the ladder main body is attached to the back door via two hooks provided at the tip of the holder formed in the balance state, a puller mechanism provided at one place of the ladder main body is provided. By actuating, a uniform tensile force can be applied to each of the hook portions provided at the upper and lower ends. As a result, each hook portion and the back door edge are engaged in a uniform state, and at any one of the engagement portions between the back door edge and the hook portion, the back door edge portion is engaged. No excessive load (load) was applied to the side.
Therefore, it is possible to prevent deformation of the edge of the back door.

In the state where the ladder device is attached to the back door in this way, by operating the lock device provided at the upper holder,
The ladder device is attached to the back door with an even load, and such a state is fixed by the operation of the lock device. Therefore, the gap between the upper holder and the upper end of the ladder main body is as described above. By the operation of the lock device, it was fixed in a state where relative swinging motion was impossible. Therefore, the engagement state between each hook portion provided at the distal end portion of the upper holder and the upper edge of the back door does not shift. as a result,
The stable mounting state of the ladder device to the back door is maintained.

Further, the ladder device thus mounted cannot be completely removed unless the back door is opened, and therefore the anti-theft function can be exhibited.

[Brief description of the drawings]

FIG. 1 is a developed perspective view showing the overall configuration of the present invention.

FIG. 2 is a front view showing a state in which the ladder device according to the present invention is attached to a back door.

FIG. 3 is a sectional view showing a configuration around an upper holder and a lock device according to the present invention.

FIG. 4 is a sectional view showing a configuration around a lower holder and a puller mechanism according to the present invention.

FIG. 5 is a front view showing the entire configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladder main body 11 Cross member (lowest end cross member) 11 'Cross member 16 Collar 19 Side frame 2 Upper holder 21 Bracket 211 Engagement recess 216 Female screw part 22 Hook member 229 Hook part 3 Lower holder 31 Slide member 315 Female screw part 32 Hook member 322 Hook part 4 Arm 44 Base part 5 Puller mechanism 51 Bolt 55 Guide part 6 Lock device 61 Bolt (Lock bolt) 66 Lock plate 666 Projection 9 Back door 99 Attachment

Claims (3)

[Claims] 1. A vehicle ladder detachably attached to a back door or the like, comprising: a ladder body having a plurality of steps; and a ladder body provided at an uppermost end of the ladder body. And a hinge attached to the bracket so as to be capable of oscillating movement in a plane to be moved. The bracket has a hook at its tip end and is three-dimensionally movable with respect to the ladder main body. An upper holder comprising a hook member provided so that relative movement of the upper and lower ladders is possible; a puller mechanism provided at one end of the ladder main body and serving to attract the upper holder and the lower holder; A longitudinal direction of the ladder main body, which is provided at a lower portion of the main body and along a guide portion provided on the ladder main body. The sliding member is formed so as to be able to perform relative rotational movement relative to the slide member and the slide member, and the rotational movement is performed in the same plane as the surface of the ladder main body. And a lower holder formed of a hook member having a hook portion at a tip portion thereof. 2. The vehicle ladder according to claim 1, wherein
At the connection between the upper holder and the ladder body,
A ladder for a vehicle, comprising a lock device for restricting a swinging movement of a bracket forming the upper holder with respect to the ladder main body. 3. The vehicle ladder according to claim 1, wherein
A puller mechanism provided at one end of the ladder main body, a bolt provided rotatably on the cross member side, and a bolt provided at the slide member, wherein a male screw of the bolt is provided. A female ladder, comprising: a female screw portion that is screw-coupled to the portion.