FI116512B - Lockable carriage - Google Patents

Description

116512

WAGON LOCKED WITH SAFETY TRACK

The invention relates to a protective device which prevents a person from falling when moving on a ladder. The protective device is locked on a rail attached to the ladder by a spring member and prevents it from falling / when the person is suspended on the protective device.

In fire ladders and other climbing ladders, a rail is used as a safety device, which attaches a trolley on the rail which, in the event of a fall, responds by locking it in the rail and prevents it from falling. Carriages are known for example. Finnish Announcement No. 61133 and Application No. 842035. In these, the carriage collides with an obstacle formed on a rail or profile. The rails are used for example. T-profiles as well as those angular profiles east and corresponding C-profiles east with one profile open for guiding the carriage frame arm out of the rail.

The drawback of these wagons and the profile structures used is the tendency of the wagon to come out of the profile under stress. The C or Rectangular profile bends under stress, just as the profile opening tends to expand and thus facilitates i #,! wagon exit. In T and I profiles, as in DE 2626425, the profile side projections are easily bent outward due to the high force transmitted through the wheels of the carriage. This can cause the carriage to come out so much that it will no longer hold the lock. When using the aforementioned types of wagons and rails,, i; * · A: · The rail profile wall thickness must be sufficiently large.

; The trolley of the invention and the corresponding rail type * achieve a decisive improvement in the characteristics of the safety device and eliminate the safety disadvantages associated with existing devices.

The invention is characterized by what is stated in the appended claims.

The profile according to the invention is a C or a rectangular profile having an opening in the frame of the carriage. The profile at the edges of the aperture comprises bent edges within the profile. The C and ä rectangular profiles tend to spread under stress so that the leading edge opening of the profile increases. This is utilized by equipping the trolley body which enters into the profile! lugs which, in the locking position of the trolley, lean against the aperture side of the profile, while also leaning on the edge edges of the aperture and preventing the profile from spreading. The trolley and rail combination prevent the trolley from leaving the profile locked in the hips and allow the use of thinner material in the profile.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which Figure 1 shows a carriage in a rail profile.

Figure 2 shows a rail profile.

Fig. 3 shows the carriage in the locked state with the rail cut away from the case of Fig. 1 and reduced.

Figure 4 shows the wagon obliquely.

In Fig. 1, the carriage 4 is positioned on the rail profile 1. The carriage moves up and down on the rail when the belt loop 5 attached to the frame 4 is pulled away from the rail at the same age.

The user attaches a belt with one end in the belt loop 5. When the carriage 4 is pulled away from the rail 5 by the loop 5 while moving up or down in the direction of the rail,! I, '; the trolley will not lock into the collision protrusions formed in the rail in '1 * »· 2 located on the rear wall of the rail.

1 I * 'Fig. 2 shows a k i profile i 1 i 1, on the rear wall of which • the tool has been punched with the projections 2 bent into the profile at appropriate intervals. In this type of rail, holes 13 are provided in the rear wall between the projections to secure the rail 1 to the ladder. The pr officine shape of the rail tapers towards the leading edge. The profile has an open profile at the front. The edges of the resulting opening have profile bends inside the 3 profiles. The inner surfaces of the edges 3 are denoted by reference numeral 12.

3, 116512

Fig. 3 is a sectional view of the situation of Fig. 1, in which the carriage 4 is locked onto the rail 1. In the carriage 4, a spring 14 disposed around the pin 7 has tensioned the

The trolley wheel 6 towards the belt loop 5 whereby the trolley wheel 6 has hit the front edge of the rail and accordingly the trolley body 4 has since been moved by the spring 14 towards the rear wall of the rail. Because of the downward movement of the wagon body, the lower impact edge 10 of the wagon body then collided with the projection 2 and stopped the wagon. The body 4 remains locked when the belt loop is pulled down. The locking is released when the belt loop is pulled away from the rail perpendicular to the rail.

In normal trolley operating position with 5 loops of water | Because of the smaller forces exerted almost perpendicularly away from the rail, the pair of carriages 6 is, by virtue of the spring 14, not in contact with the leading edge of the rail 1 on either side of the opening. Due to the rolling of the pair of wheels 6, the carriage is easily traveled up and down. Furthermore, in this case, the carriage is held in the direction of the rail by pairs of projections 9 which, if necessary, drag the front edge of the rail and the inner surfaces 12 of the edge bends 3 in the profile opening but do not significantly impede the carriage.

Fig. 4 shows a wagon having an elongated hole 8 for the shaft of a pair of wheels 6 and a pin 7 for securing the spring 14. At each end of the wagon there are collision edges - 1 i *.

10 which collide with the projections 2 in the locking situation. In addition, at each end of the carriage there are pairs of projections 9 which are arranged according to the rail profile 1 so that a suitable clearance is left between their inner surfaces 11 and:

The strength and stiffness of the wall of the rail 1 are adapted so that in the event of a stress in the rail in the event of a fall it is possible to spread the opening of the rail profile and thereby the edge bending members 3 rest on the projections 9 of the carriage 4. The support also causes additional friction between the trolley and the rail in the locked position. Since the structure of the trolley receives some of the deformations that come into the rail, the rail can be made of a relatively thin plate or a profile with a thin wall. The profile tapered toward the leading edge of Fig. 2 has a strong tendency to extend at the leading edge opening, but other profiles, rectangular, circular, or combinations thereof, also have the same tendency.

The pairs of projections 9 can also be replaced by wheelsets to ensure complete traction of the trolley at the front edge of the rail. The inner sides 12 of the wheelsets are then adapted to cooperate with the inner surfaces 12 of the edge extensions 3, similarly to the parts 9 and their inner surfaces 11.

The invention is not limited to the following exemplary embodiment, but many modifications are possible within the scope of the inventive idea defined by the claims.

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Claims (3)

5 116512 A trolley (4) movable in a safety rail (1) which engages said rail when the carriage (4) turns to a position different from the advancing position and collides with projections (2) formed on the rail (1) at its impact edge (10); 9) on which it rests on the leading edge of the rail (1), said leading edge comprising a pair of edges (3) having both edges bent inwardly towards the rear wall and forming a gap in the front wall, said parts (9) being projections the ends of the carriage (4) being pairs of supports which engage the edges (3) and the inner surfaces (11) of the supports are mounted to support the edges (3) as they tend to separate and widen the leading edge gap in the locking situation. 2. Vagnenligtpatentkrav 1, stump nose därav, att avsatsdelama (9) and glidstycken. Trolley according to Claim 1, characterized in that the projections (9) are slideways. Trolley according to claim 1, characterized in that the pair of projections consists of two wheels or rolls respectively. »I * 1 * *. 1. I en skerhetsskena (1) rörlig vagn (4), som laser sig i nd scanner scanner sig at riktning som awiker dess riktning framat och stöter med dess stötkanter (10) emot; j ': avsatser (2) som verforman i scan (1) och vilken vagn (4) omfattar delar (9), med vilka::; - f den stöder sig mot scenans (1) framkant varvid nämnda framkant omfattar ett kantpar (3), I i. ' : account flash hörande vardera kantema är böjda inät mot bakvägg och kantema formar en * 'i springa i framvägg, kännetecknad därav, att nämnda delar (9) är avsatsdelar:.:; som är formade i vagnens (4) ändor för att verka som stödpar, som griper i edema (3) 'och de inre ytoma (11) av stöden är monterade att stödja edema (3), näressa sträver att oka deras ommesidid Avstand och utvidga springan i framkanten i lasningsställning. 3. Vagn enligt patentkrav 1, kännetecknad därav, att avatsatsparet photographed in the case of eller moto assets roll.