JPH01284686A - Rotary ladder with elevating cage for automobile - Google Patents

Abstract

PURPOSE: To easily and quickly operate a rotary ladder even in any work attitude by arranging first and second lock devices for respectively automatically locking an extension rail on the lowest ladder member and a lifting cage. CONSTITUTION: In this rotary ladder 1 provided on a fire engine 2, a first lock device 8 is arranged to automatically lock or release an extension rail 7 on or from the lowest a ladder member 6 in a completely retracted extension rail position. The extension rail 7 is automatically locked on a lifting cage 10 to be accompanied together, the lock device is simultaneously removed, and a second lock device 9 operated by the lifting cage 10 is arranged. The extension rail 7 is pulled out to the optional length, the rotary ladder 1 is automatically, quickly and reliably set to an optional height, and is turned by 360 deg. by a ladder mechanism without colliding with an obstacle.

Description

DETAILED DESCRIPTION OF THE INVENTION As indicated in the first part of claim 1, the present invention provides:
A rotating ladder with a cage for automobiles, especially a rotating ladder for firefighting, is supported so as to be pivotable about a horizontal axis arranged on a rotating platform, and can be stood upright or laid down.1. :Relating to things that are sipped.

German Patent No. 2 328 990 discloses a rotating ladder with a lifting cage for motor vehicles, in which a separate rail section is inserted at the lowest ladder member in the form of an extension of the rotating ladder body, thereby lowering the cage. A type of vehicle that can be slid into position and entered by a user is known. In this type, when moving the elevator cage, it is time consuming to take out the additional ladder slider from the support on the vehicle side and insert it into the upper chord of the lowest ladder member.

As a result, valuable time for rescue work is lost. Pluggable extension rails also require expensive bearings in the area of the rotating ladder carousel on the vehicle base. Rotating the rotating ladder through 360° is not possible with the extension rail installed. This is because it will collide with the pedestal on the vehicle. Furthermore, if there is an obstacle in the vicinity of the vehicle, when the gear of the ladder is turned, the long extension rail may have to be removed again with great effort.

Also, according to Japanese Patent Application No. 49956/1972,
Rotating ladders for motor vehicles of the type mentioned at the outset are also known.

In this case, extension rails are provided on the lowest ladder member so that these rails can be accessed in a telescopic manner. The elevator car is also equipped with two rows of rollers that cooperate with a movable extension piece.

The object of the invention is to produce a rotating ladder for motor vehicles that has a simple superstructure, is extremely reliable and, in particular, can be operated easily and quickly in any working position. There is a particular thing.

This object, which forms the basis of the invention, was solved in the form described in the characterizing part of claim 1.

The rotating ladder according to the present invention further comprises the following features:
According to the features described in Items 1 to 13, a preferable configuration can be obtained.

In particular, the invention features a first locking device for automatically locking or releasing the extension rail to the lowest ladder member in the fully retracted extension rail position, and a lift cage and extension rail. and a second locking device for automatically locking and entraining the extension rail to the lifting cage and simultaneously releasing the first locking device.

This second locking device is preferably operable by the lifting car at the position of the lifting car in the lowest region of the extension rail.

In this way, by pulling out the extension rail to any desired length, the rotating ladder body can be automatically, quickly and reliably brought to any desired height between the ground and the end of the ladder. If the lifting cage is raised higher, the extension rail is automatically returned to its retracted position at the lowest ladder member, which optimizes the freedom of movement of the ladder and avoids hitting obstacles. 360° ladder mechanism
It is possible to turn around.

In operation, when lowering, the lifting cage can be slid from the lowest ladder member onto the extension rail without delay. When the cage reaches the end of the rail F, it unlocks the extension rail via the base plate and the cross bolt additionally welded to the rail and carries it downward. at the same time,
The cross bolt operates the angle lever, which in turn operates the spring-loaded coupling lever.

The coupling lever is located in front of the cross bolt, so that slippage of the extension rail at the rear of the cage is prevented by the weight of the cage and, in addition, a frictional contact is created when the rail is pulled up. The extension rail is therefore coupled with the lifting cage by frictional contact in both directions, the cage being
Can be moved to any arbitrary loading position.

When ascending, the extension rail retracts and reaches the lowest position.
After C, the coupling lever is released via a stop cam attached to the base plate, thereby releasing the connection between the extension rail and the lifting cage.

The coupling lever and the angle lever are then returned to their starting position by the spring.

Another solution is to extend the support rail with a separate drive, either electric, pneumatic or hydraulic, downwards to the desired position and retract it back to the lowest position, with a corresponding A control device is provided.

Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

As shown, a rotary ladder 1 for a motor vehicle is installed on a vehicle 2, in particular a fire truck. In this case, ladder 1 is
It is rotatably supported around a horizontal shaft 4 disposed on a rotary table 3, and can be stood upright or laid down.

The upper chord 5 of the lowest ladder member 6 has extension rails 7 arranged on each side of the upper chord. This extension rail is slidable downward in the ladder direction from the lowest ladder member 6. As shown in Fig. 2, the extension rail itself surrounds the upper chord 5 of the extension 5, has a substantially U-shaped cross section, and slides on the upper chord of the extension rail. . A T-shaped rail 24 is further welded to the extension rail main body 7. This T-shaped rail serves as a running surface for a lifting cage 10, which can be raised and lowered along a rotating ladder 1 extended to one side.
The cage 10 itself is raised and lowered by a cable or chain hoist along a ladder 1.
It is linked to the tip of ladder 1.

The extension rail 7, which is telescopically connected to the lowest ladder element 6, is locked in the fully retracted position (not shown in FIG. 1) by a first locking device 8 that is automatically actuated. . As shown in FIG. 2, this is accomplished by two balls 11 and 12, which are aligned with each other in the transverse direction of the extension rail and loaded with initial shots. Balls 11, 12 are provided at the lowest ladder member 6 and cooperate with corresponding spherical recesses in the extension rail 7 m-=i
“Ru.

The balls 11.12 are automatically locked into recesses by spring force in the non-working position of the ladder 1.If the ladder parts are heavier, the balls can have more locking points. I can do it. In the locked position, the lifting cage 10 can be moved from the upper chord of the lowest ladder element 6 to the running surface of the T-shaped rail 24 of the rail 7 without applying pressure and without delay. Therefore, the cage 10 can slide downward on the extension rail 7 and reach its lowest position.

At the lowest position of the lifting cage 10, the second
The locking device @9 works automatically. This situation is shown in detail in FIGS. 3 and 4.

The second locking device 9 shown in FIGS. 3 and 4, in particular,
At least one cross bolt 13 is provided at the lowest ladder member 6. A two-part, spring-loaded, pivotable jaw 14 can grip around this cross bolt 13 at the base plate 15 and lock it. After locking Crosspol i~13, cage 1
0, the extension rail 7 is carried downwards and the first clocking device 8 ("ball locking point") is released. In that case, the lifting car 10 and the extension rail 7 are held by a cable or chain hoist of the lifting car and are controlled to lower towards the ground.

During the upward movement of the lifting car 10, the additionally connected extension rail 7 is again taken upwards in the same manner and inserted into the lowest ladder part 6 until the rail is fully inserted. At this point, the first locking device 8 is locked again. At the same time, as the cage 10 continues to rise, the second locking device 9 is released again and the crosspoles 1 to 13 are also released again.

In particular, the second locking device @9 surrounds the base plate 15, which is screwed to a vertically disposed member on the side of the cage 10.

An extension rail 7 is provided on the base plate 15 with the shaft 18 as the center.
An angle lever 16 is rotatably linked in parallel with the cross bolt 7. This lever 16 is given a first shot destination in the direction of the lock position (downward in FIG. 3) by a first shot firing spring 17. Angle lever in Figure 3
When the cross bolt 13 is not received, the lever 16 assumes a posture by means of a stopper (not shown) such that the link connecting leg of the lever 16 is horizontal and the leg extending downward at a right angle extends vertically. . The downwardly extending free leg has a notch or tooth. This tooth can engage in a corresponding locking recess of the coupling lever 19 below it. The connecting lever 19 also connects to the base plate 15 in the same way.
It is attached in a linked manner so as to be able to swivel, and also slidably, and is provided with an initial sale point by means of a spring.

These springs are also supported by the base plate 15. In particular, the connecting lever 19 is connected to a shaft 2o fixed to the base plate.
It can be slid vertically downward along the . The shaft 20 extends perpendicularly to the axis of the cross bolt 13. One of the connecting levers has a spring 22 that is pulled back to the center, and this spring 22 pushes the lever 19 in the locking direction (upward in FIG. 3). When the lever 19 slides downward in FIG.
It moves at a stop cam 23 approximately parallel to and spaced from the axis 20 which is fixed to the base plate. As a result of this movement, the original engagement portion of one coupling lever pivots about the shaft 20 against the force of the spring 21, and the gripped cross poles 1 to 13 are released. When the gripped cross bolt 13 is completely released, the connecting lever 19 is moved by the return force of the return spring 22 and the torsion spring 21.

It tries to return to its original position. but,
Since the angle lever 16 rests on the initial firing spring 17 and prevents it from returning completely, the engagement 1F portion of the connecting lever 19 hits the stop collar 25 of the free leg of the angle lever 16, and as a result, the angle lever 16 Cross bolt 13 in the direction of
A free receptacle is formed.

In the last mentioned position of the second locking device, lift cage 1
When releasing 0, the angle lever 16 directly abuts the cross poles 1 to 13, and the bristles spring 1
It is pushed up slightly against the force of 7. This slight push is sufficient to completely release the connecting lever 19 from the collar 25. Due to the initial spring force of the torsion spring 21, the connecting lever 19 is placed in the position shown in FIG.

After a resilient contact has occurred between the cross bolt 13 and the link leg of the angle lever 16, the first locking device 8 is released and the cross bolt 13 or the associated extension rail 7 is released. The angle lever 16 descends toward the connecting lever 19 due to its own weight, and as a result, the free leg of the angle lever 16 can be completely locked with the connecting lever 19.

The new features described above and/or shown in the drawings, individually or in combination, belong to the essence of the invention, even if they are not explicitly stated in the claims. It is something.

[Brief explanation of the drawing]

Figure 1 is a side view of a rotary ladder for automobiles. The right-hand figure shows the extension rail extended diagonally downward, and the left-hand figure shows the extension rail turned 180 degrees from this position. 2 is an enlarged view of the first locking device according to the invention; FIGS. 3 and 4 are respectively a schematic vertical sectional view and a first illustration of the second locking device; FIG. It is a horizontal sectional view. 1... Car rotating ladder, 2... Car, 3...
・Rotary table, 4...Horizontal axis, 5...Upper chord, 6...Lowest ladder part old, 7...Extension rail, 8...First
locking device, 9... second locking device, 10...
Stomach cage, 11.12...Ball, 13...Crosspol l-115...Base plate, 16...Angle lever-117...Initial shot spring, 18...Shaft, 19.・・・
Connection lever, 20... shaft, 21... torsion spring, 22... return spring, 23... stop cam.

Claims (13)

[Claims] (1) A rotating ladder with a lifting cage for automobiles, especially for firefighting, in which the rotating ladder is placed on the horizontal axis (4) of the rotating base (3) in order to stand upright or lie down on its side.
The extension rail (7) is supported on the upper chord (5) of the lowest ladder member (6).
), and this rail (7) can slide downward in the direction of the ladder relative to the lowest ladder member (6), when the extension rail (7) is fully retracted, A first locking device (8) is provided for automatically locking and releasing the extension rail (7) at the lower ladder member (6), and is also provided with a lifting cage (10) and an extension rail. (7) is provided with a second locking device that automatically locks the extension rail (7) to the lifting cage (10) and brings it along with it, simultaneously releasing the first locking device. A rotating ladder with a cage for automobiles. (2) In the rotary ladder for automobiles according to claim 1, the second locking device (9) has an extension rail (
7) A rotary ladder, characterized in that it is operable by the cage (10) in the cage position in the lowest end area. (3) In the rotary ladder according to claim 1 or 2, the first locking device (8)
has at least one ball (11 or 12) given an initial rebound force at one rail member (extension rail or lowest ladder member), and this ball is applied to the other rail member. A rotating ladder characterized in that it can be locked with a spherical recess of the lowest ladder member or extension rail. (4) In the rotary ladder with a lift cage for automobiles according to claim 3, two balls (11
, 12) are provided at the upper chord (5) of the lowest ladder member (6), and both of these balls (11, 1
2) is lockable with a corresponding spherical recess at the extension rail (7). (5) In the rotary ladder with a lift cage for automobiles according to any one of claims 1 to 4,
a second locking device (9) surrounds at least one cross bolt (13) fixed to the extension rail;
A rotating ladder characterized in that this bolt (13) is lockable in the cage (10) by means of a pivotable jaw (14) which is provided with an initial firing force. (6) In the rotary ladder with a lift cage for automobiles according to claim 5, the pivotable jaw (14) is provided with a base plate (15) screwed to the lift cage (10).
), and is divided into two parts. (7) In the rotary ladder with a lift cage for automobiles as set forth in claim 6, the pivotable jyo (14) is provided with an angle lever (14) to which an initial spring force is applied at the lock position
16) and an opposing connecting lever (19) which is given initial firing force in the locked position, and this lever (19)
A rotating ladder characterized in that the ladder can be locked with the cross bolt (13) at the jaw lock position by an angle lever. (8) In the rotary ladder with a lifting cage for automobiles according to claim 7, the angle lever (16)
The cross bolt (1) is rotatable about the shaft (18).
3) is fixed to the base plate (15) in parallel to the base plate, and the connecting lever (19) is rotatable at right angles to the cross bolt (13) about the shaft (20) fixed to the base plate. rotating ladder. (9) In the rotary ladder with a lifting cage for automobiles according to claim 8, the shaft (2) of the connecting lever (19)
A rotating ladder characterized in that a torsion spring (21) is wound around the center point (0), and this spring (21) applies an initial spring force to a connecting lever (19) in the locking direction. (10) Any one of claims 7 to 9
In the rotary ladder with a lift cage for automobiles described in 1., the connecting lever (19) is connected to the shaft (2
0) so as to be able to come out of the locking position and slide vertically against the force of the return spring (22), and parallel to the shaft (20) fixed to the base plate. A rotary ladder, characterized in that it moves along a cam which simultaneously pivots the coupling lever (19) out of a locking position about an axis (20) fixed to the base plate. (11) In the rotary ladder with a lifting cage for automobiles according to any one of claims 1 to 10, the first locking device (8) and the second locking device (9) are provided.
Rotary ladder, characterized in that it is electrically operable, in particular by means of a lifting magnet. (12) In the rotary ladder with a lift cage for automobiles according to any one of claims 1 to 10, the first lock device (8) and the second lock device (9) include: A rotating ladder characterized in that it can be operated hydraulically, in particular by means of a hydro cylinder. (13) In the rotary ladder with a lift cage for automobiles according to any one of claims 1 to 10, the first lock device (8) and the second lock device (9) include: A rotating ladder characterized in that it can be operated pneumatically, in particular by means of an air cylinder.