DE29605422U1 - Fireplace insert with vertically sliding door - Google Patents

Description

Company BBK fireplace heating inserts Berthoid Kuhn, Heinrich-Schlick-Str. 13, 48625 Metelen

"Fireplace insert with vertically sliding door" 5

The innovation concerns a fireplace insert according to the preamble of claim 1.

Such fireplace inserts are well known in practice. They have the advantage that the sliding door allows for large-scale glazing, so that when the door is closed, the visual impression of an open fireplace can be almost maintained. In addition, the door does not protrude into the room in an intrusive manner when it is open, so that the operation of an open fireplace and an unobtrusive

unhindered access to the fireplace is possible.

In practice, however, after a certain period of operation, disadvantages often arise in handling the sliding door because it can only be moved with a great deal of force.

is.

The innovation is based on the task of improving a generic fireplace insert so that its sliding door runs as smoothly as possible over a long period of time.

This problem underlying the innovation is solved by a fireplace insert with the features of claim 1.

In other words, the innovation proposes to create free spaces between the guide rod and the sleeves through different shapes. In this way, a soapy cleaning effect can occur every time the sliding door is operated: When the sleeve slides along the guide rod,

Contaminants adhering to the guide rod are

and can trickle down through these spaces. In the state of the art, however, round guide rods and ball bearings or ball armor that fit tightly against them are usually used, in which the contaminants become trapped, so that the mobility of the door decreases with increasing

Operating time of the fireplace insert is only possible with ever greater effort.

It is advantageous to use guide rods with a square cross-section on which round sleeves slide. In this way, the contact areas between the guide rod and sleeve are minimal, namely only in the form of line contact, but not in the form of surface contact, so that the frictional resistance is in principle low. In addition, depending on the number of corners of the guide rod, several intermediate

spaces are created between the guide rod and the sleeve through which the contaminants can trickle down.

Advantageously, the guide rod can be made of steel, while brass sleeves are used. This results in

a smooth-running and low-friction material combination that ensures smooth operation of the sliding door over a long period of time even without moving parts, as is the case with a ball bearing.

Advantageously, the guide rod can be fixed in place at the bottom - as is known from the prior art - for example by screwing, welding or the like. In the upper area, however, the guide rods can advantageously be held by eyelets. This also results in

When the guide rods expand due to temperature during operation of the fireplace insert, the guide rods remain straight, as bending is eliminated, and this in turn results in reduced resistance for the movement of the sliding door.

In particular, if each guide rod is held at the top by two interconnected eyelets, the eyelet can be freely adjusted in two directions, so that the guide rod can be easily and quickly adjusted at low cost during the manufacture of the fireplace insert. Adjustment in a third direction is not necessary, since the guide rod extends through the eyelet. The eyelets can be formed inexpensively using commercially available eyebolts. 10

An example of the innovation is explained in more detail below using the drawings.

Fig. 1 in schematic and perspective view

a fireplace insert,

Fig. 2 in an enlarged scale compared to Fig. 1 the

on guide rods guided door frame and Fig. 3 in a perspective view from above the

upper area of the guide rod.

In Fig. 1, 1 generally designates a fireplace insert, the fireplace of which can be closed off by a vertically sliding door 2. Fig. 1 shows the door 2 in its raised position. A holder 3 for a driver 4 can be seen on top of the door frame, which in particular

as can be clearly seen in Fig. 2.

When the door is lowered, the driver 4 presses on a lever 5, which is pivotable at its end shown on the left in Fig. 1, but is fixed in place and whose

right end is connected to a throttle valve of the flue gas collector of the fireplace insert 1 via a connecting rod. Due to its own weight, the throttle valve falls into a release position in which the outlet cross-section of the flue gas collector is almost completely released. As soon as the door

2 is closed and the driver 4 is attached to the lever 5.

, the throttle valve also closes increasingly when the door 2 is closed further, so that the desired reduction in fuel consumption is possible when the fireplace insert 1 is closed.
5

A hole running through the door frame can be provided below the bracket 3, so that the height of the driver 4 can be adjusted within the bracket by means of a corresponding screw, so that the position of the lever 5 when the door 2 is closed and thus the position of the throttle

flap is adjustable when the fireplace insert 1 is closed and can be adapted to the different fuels and/or weather conditions.

From Fig. 2 it can also be seen that on the door frame An

welding sleeves 6 are provided, which can have an internal thread and into which a brass sleeve 7 is screwed.

Furthermore, it can be seen from Fig. 2 that the door 2 with the sleeves

7 run on guide rods 8 with hexagonal cross-section.

As can be seen from Fig. 1 and in particular from Fig. 3, the guide rods 8 are fixed with their lower end to the frame of the fireplace insert 1. The upper end of the guide

guide rods 8, on the other hand, protrude through an eyelet 9, which is formed by a commercially available eyebolt. The two approximately horizontally running eyelets 9, which hold the guide rods 8, are in turn fastened with their threaded end in approximately vertically arranged similar eyelets 10, where

where these eyelets 10 are fixed to the frame of the fireplace insert 1. The fixing is carried out using screw connections and lock nuts, so that both the pivoting movement of the eyelets 9 and 10 and the length adjustment along their threaded end allow a

Fine adjustment and thus alignment of the upper end

the guide rods 8 in a simple, very time-saving and also reversible manner.

Claims (4)

"Fireplace insert with vertically sliding door" Protection claims: 1. Fireplace insert, with a housing which accommodates a fireplace in its interior and with a door which, in the open position, provides access to the fireplace and which, in the closed position, closes the housing, wherein the door is designed as a vertically movable sliding door, and wherein the door has sleeves which are arranged to be longitudinally movable on vertical guide rods, characterized in that the free inner cross section of the sleeves (7) and the cross section of the guide rods (8) have different shapes. 2. Fireplace insert according to claim 1, characterized by guide rods (8) with a square cross-section and by sleeves (7) which have a round free inner cross-section. 3. Fireplace insert according to claim 1 or 2, characterized by Steel guide rods (8) and brass sleeves (7). 4. Fireplace insert according to one of the preceding claims, characterized in that the guide rods (8) in their upper area are held in eyelets (9). 5, fireplace insert according to claim 4, characterized in that two eyelets (9, 10) interact with each other, a first eyelet (10) being attached to the frame of the fireplace insert and wherein the second eyelet (9) is fastened in the eye of the first eyelet (10) and receives the guide rod (8) with its eye.