FI104912B - Clamping device for weight compensating torsion spring device at a door leaf - Google Patents

Abstract

The invention concerns a tensioning device (7) for at least one torsion spring (2) fitted round a shaft (1) which is operatively linked to a door leaf with which it moves, executing a rotary motion as it moves. One end of the torsion spring (2) is fixed to a tensioning ring which can be rotated about the shaft (1) and, following tensioning of the spring by rotation of the tensioning ring (5), can be locked to the shaft (1) so that it can no longer rotate. The spring (2) can be tensioned manually, without the need for any great force and without danger for the fitter, by virtue of the fact that the tensioning ring (5) is fitted coaxially to the power-output element (9) of a high-ratio gear (8) whose power-input element (10) is operatively connected to the power-output element (9), and hence to the spring, by mounting the power-input element (10) in a housing (11) fitted to the shaft (1) or to the tensioning ring (5), the power-input element (10) being designed so that it can be connected to an ordinary hand-held rotary power tool.

Description

, 104912

Tensioner for door leaf weight compensating coil spring - Spänn-anordning för viktkompenserande torsionsfjäderanordning vid et dörrblad

The invention relates to a tensioning device for at least one coil spring device arranged on a shaft, the shaft being operatively connected to a door leaf - preferably a door leaf of one or more portions which are vertically movable, e.g. the end being facing the associated shaft bearing and held in place against rotation, wherein its other end is connected to the spindle rotating spindle, the spindle being, after tightening the spring 10 by turning the spindle, lockable against the spindle, with a worm wheel, the gear worm being provided with bearings for clamping the helical spring on the shaft or clamping bushing for transmission of power to the worm wheel and can be coupled to a conventional motor-driven, especially electric motor-driven, rotary outlet hand tool such as a hand drill, wherein the clamping housing for the shaft is circumferentially at least two-piece, with the clamping housing being transverse to the longitudinal axis of the shaft 20, in particular in the region of the inner wall side of the door frame to be closed by the door leaf, and wherein the clamping housing is on the shaft. . when mounted and geared, its axial displacement with respect to the clamping sleeve / or worm wheel or coupling is prevented; • ·. . ·. ···. • with a radial design with four radial holes arranged at equal intervals in the circumference where the clamping lever can be placed. Pre-installed spring. for the shaft, this work must be done at the installation site, usually at a relatively high • ♦ · • 30 height. The required forces increase to a very high degree towards the end of the tightening process, so that, taking into account the position of the installer on the ladder, there is a considerable risk of accident: *: ': and the installer must provide a corresponding force. With the above «. · · ·; in the clamping mode, the clamping lever is inserted into the radial holes of the clamping sleeve, using i · •. Usually, two levers have to be operated with both hands so that for each slight clamping motion it is not necessary to tighten the locking screw which secures the clamping bush relative to the shaft. In the second solution, which operates with a single-handed ratchet solution, the conditions are not significantly different, especially for the 2 104912 manual actuators.

A clamping device with the above mentioned features is already known from U.S. Patent 3,921,761. Instead of a device for operating the clamping sleeve only by hand, more or less cumbersome in view of the clamping force to be obtained, without the manual torque needed to tighten the spring. Thus, it is not necessary to engage the clamping levers simultaneously and / or alternately with both hands simultaneously and / or to use a one-way ratchet device which requires at least the total torque required to manually tighten the helical spring. Both conventional spring tensioning procedures are dangerous and strenuous under installation conditions, which are avoided by using a tensioning device according to the invention and using it with a conventional hand-held power tool.

In this known object, the starting point is that the tensioning device for the spring is made into a unit comprising a complete worm gear, which prevents it from being connected to a conventionally implemented clamping sleeve -20 with mounting holes for manual clamping levers. Certainly, there are situations regarding installation space and cost where this procedure seems cumbersome and / or where handling is not always straightforward.

• »« · · '; The object of the invention is to provide a clamping device of the kind mentioned above, which allows the installer to tighten the coil spring device in a safe and low-manual manner.

• · • * * • · · • ·. . ·. This object is solved according to the invention in that the gearwheel teeth are made in the shape of a hollow groove with an axial end extending away from the clamping sleeve (5) and extending approximately radially outwards. an outlet region formed in the radially extending annular annulus, wherein the annular shoulder (groove) in the axial annular annulus engages the clamping housing to prevent axial mutual movement.

I «*

The worm gear is still attached to the clamping sleeve, and only the worm gear is engaged; ' the clamp is arranged in the clamping housing, whereby the special design of the worm wheel and 'i: attachment between the worm and worm wheel and - ultimately - the clamping sleeve and: *': 35 securing the coupling between the worm and worm wheel makes handling easier, namely saving the subscriber.

3, 104912

In a particularly preferred embodiment, the worm gear is implemented as self-braking, i.e., when the hand tool is disengaged from the gear, the clamped spring cannot move the gear up to the inlet member. This facilitates handling when tightening, ie interrupting the tightening operation either intentionally when the hand tool is disconnected does not result in the restoration of December 5th. The transmission mechanism consists of a worm gear having a worm gear fixedly connected to the shaft for rotation of the end of the pivotable spring to a clamping sleeve or mounting cone, and an engaging helical worm which is screwed into the clamping casing to be clamped at one end.

In this case, the clamping housing is part of a clamping device which can be mounted on the shaft or the clamping sleeve solely for clamping so as to establish and secure a force transmission connection between the inlet and outlet means. For this purpose the clamping housing is made at least two parts in the circumferential direction, preferably when mounted on the shaft in the form of a U-shaped circumferential main part, through which holes 15 can be mounted during mounting on the shaft so that the shaft inserted in the U-shaped main part so that the force-transmission connection between the clamping housing and the clamping sleeve, in particular between the inlet coil and the inlet coil, is ensured. When the stop pin 20 extending through the concentric holes is removed, the main part of the clamping casing and thus the entire clamping casing can be removed from the shaft or clamping sleeve, whereby the connection for transmitting the force is broken.

In order for the clamping casing mounted on the shaft or clamping sleeve to receive the reaction torque applied to the spring, the clamping casing is firmly supported against rotation of the shaft, so that, for example, a hand tool associated with the inlet means: Y: 25 does not need to receive. Thus, the clamping housing is provided with a cross piece which, when installed, extends transversely to the longitudinal axis of the shaft, and whose end away from the clamping housing is in particular connected to the door leaf. . ·. by means of a roller body arranged in the region of the door frame of the closable door opening, and in particular in the area of the end of this crosspiece, preferably ball-shaped, since the axis of the spiral spring stretches in the direction of the centerline of the shaft by. follows the movement of the clamping housing and thus the cross member in the longitudinal direction of the shaft. Crossover- • · ·. Advantageously, the length of the strap can be varied to suit different spaces, in particular by means of supports fitted at different points in the clamping housing.

• · • * «• · ·

In a particularly preferred embodiment, the helical gearwheel gear 35 is fastened to the clamping sleeve by a flange. Similarly, in a particularly advantageous embodiment, the screw is made of the same piece as the clamping sleeve. This: '': The latter embodiment is particularly suited to the original equipment of the shaft of the species in question. The clamping sleeve and the outlet member then form a preferred casting 104912 4. In the event that an existing clamping sleeve is subsequently to be provided with a clamping device according to the invention, this can be done using a radial hole provided for operating the clamping levers, particularly preferably by a two-piece or axial longitudinal centered sectional arrangement. , mounted by pins extending into radial holes opposed to the diagonal, whereby after joining the half shells, it forms the output member of the transmission mechanism, in particular the worm gear.

When the clamping body or the connecting piece is made of several parts, care must be taken with regard to the uniform circumference of the worm wheel 10, also taking into account its rotation with respect to the shaft, for example by means of distance securing sleeves extending through said several, in particular passes through the corresponding screw bolts of the screw connections.

15 Mounted on the shaft, the clamping housing and the gearwheel having a quadrant-sized hollow groove-like engagement form an interlocking interlocking movement between the worm and worm gear, in particular by means of a projection in the clamping housing and engaging in the worm wheel or to the shoulder or groove in the connector.

The at least one helical spring device disclosed in the claims, which compensates for the weight of a door leaf having a vertical movement component, is formed in a conventional manner by a helical spring having a corresponding intensity, which threads. · · ·, 25 surround the axis. There are two or more of these helical springs on the shaft. These separate / · '*; The set coil springs can also be formed of parallel weaker coil springs • ♦ ♦ connected by a planetary gear. Depending on the installation conditions and implementation, it may be desirable that the inlet nozzle, in particular the coil, may be driven by a portion of 30 shafts at each end of each of the two axial ends of the inlet member, which is preferred. : Access to connect a hand tool.

The foregoing and other embodiments of the invention will be apparent from the dependent claims 1 to 4, with particular reference to the embodiments shown in the drawing, in which the invention is further illustrated in the description below. Drawings, ··. Fig. 1 is a sectional view of a spiral spring assembly of the first embodiment 104912 5 and associated shaft portion thereof, in section; Fig. 2 is a view rotated 90 ° from the side with the end of the spring not shown in section, compared to Fig. 1; Figure 3 is a view of the clamping housing in the axial direction, the axis being cut along line III-III in Figure 5; Figure 4 is a side view, taken along line IV-IV in Figure 1; Figure 5 is a side view of another embodiment, similar to Figure 1, but without the inlet member; Figure 6 is a side elevational view of another embodiment; Fig. 7 is a side view of a second embodiment of the connecting piece away from the helical spring and a section in the area of the screw connection.

All the figures show the portion of the shaft 1 used in known manner to compensate and / or operate the weight of door panels having a vertical movement component, i.e. single-leaf lift doors, tipping doors, and in particular folding lift 15 or sectional lift doors; in principle, such a shaft also applies to the roll-to-door winding axis. In the case of the first doors, rope coils are provided at each end of the shaft, the distal ends of which ropes are wound on and off, being fixed to the door plate, thereby forming a drive coupling which converts the movement of the door to the next axis rotation: * ·; 20 languages; such devices are known per se.

• · · • · ·

The figures shown show a single helical spring 2 - which is preferably • · I ”on axis 1. a limited number of areas, in particular in connection with the clamping sleeve 5, whereby the door leaf leaf weight compensating coil spring 2, whose other non-shown end is • * · * · ”* fixed in place, surrounds the cone 3 and is connected in 4; · * '25 to cone 3 so that it cannot rotate. On the other hand, the cone 3 is rotatably connected to, or made with, a clamping sleeve 5 formed with four circumferentially spaced radial holes 6: rods can be inserted into these holes so that the clamping sleeve 5 can be rotated as usual. stationary about axis 1 to tighten the helical spring. This kind of tightening movement is tail-to-fish and dangerous, considering the installation of the shaft 1 in the frame of possibly high door openings, and the significant forces that occur when tightening the spring in the extreme position * · * *.

To simplify handling and reduce the risk to the installer, 104912 6 is provided with a shaft-mounted clamping housing 11 having an input member of the transmission mechanism 8 engaging the output member associated with the clamping sleeve 5 to transmit the force. In the present embodiment, this transmission mechanism 8 is implemented as a self-braking, single-stage worm gear such that the inlet member corresponds to the helix 10 and the outlet member to a helical wheel 9 disposed centrally with respect to the clamping sleeve and rotatably engaged therewith. Optionally, a power tool, e.g. a clamped spring will counteract the hand holding the drill if the drive from the drill to the coil is interrupted.

In the embodiments of Figures 1 to 4, the clamping sleeve 5 and the worm wheel 9 15 are formed in the same piece, the helical wheel being disposed axially away from the helical spring 2 of the sleeve, with a groove 19 formed therebetween. 5 in a region away from the shaft 1, the other end of which is radially connected to the annular groove 18, 20, whereby a rotating groove 19 is formed between the bushing and the clamping sleeve 5.

The clamping housing 11 has a main part 12 and a locking pin 13. The main part, when viewed in the direction of the shaft 1, is made U-shaped, and the coil 10 is in its central part. When mounted on the shaft 1, it is located between the legs 15 in the lower part of the middle part and above it. is a locking pin 13 which is inserted for this purpose in the area of the free ends of the branches. 25 through holes 17 provided. The shaft is then surrounded by slight play, so that the worm 10 engages properly with the hollow groove-shaped teeth of the gear 9. The radial alignment of the coil 10 is ensured by axial alignment.

With the locking in the parallel position formed by the outer 20 · · · · · * wedge 20 of the clamping body 11 engaging the groove between the clamping sleeve 5 and the annular thickener 18, as shown in Figures 1 and 2. The axis of rotation 24, on which the worm 10 is rotatably rotated: .j .: mounted, or made integral with the worm, is located in the region of the central portion 14 of the clamping cam 11 and remains stationary in the mounting members of the bearings 27, · * ·. en 28 and two ball bearings 26 which prevent both axial and radial movements. At each end of the axis of rotation 24 there are connecting members T 35 25 which enable the hand drill to be connected to either end of the shaft. The connecting members are preferably made in the form of a screw head, such as: *., Having dimensions corresponding to the locking screw 22, by which the clamping sleeve 5 can be pivotally connected to the shaft 1. These end ends of the locking screws 22 are provided with 104912 7. twisting. Reference numeral 22 merely illustrates such a locking screw; the locking screw is preferably located in the hub area of the clamping sleeve 5 between the radial holes 6.

5 Holes 29, 30 and 31 are provided in the region of the clamping housing central portion 14 away from the shaft 1 of the clamping housing 11 or from the U-shaped opening of the clamping housing, as shown in Figure 1. With the clamping housing 11 mounted in these perpendicular holes perpendicular to the axial direction, a cross piece 32 is provided which supports the clamping housing 11 and thus transmits the reaction torque of the helical spring. As the spring 10 of the thread 10 becomes longer during tensioning, the end away from the clamping body 11 of the rod-shaped crosspiece 32 is provided with a roller member 33, here shaped as a ball, which can rotate about a centerline 34 perpendicular to the longitudinal axis. Through this roller, the crosspiece leans against the door frame, for example, during the tensioning of the coil spring, rotating along it. As shown in Figures 3 and 15 4, closed holes are made in the central portion 14 on each side, and in particular at different depths, so that the crosspiece 32 can be mounted at different depths on each side to adjust the corresponding "length change" of the crosspiece. and the roller piece 33. The deep cavity hole 31 is then at the corresponding short cavity hole 29 '. This applies similarly to other pairs of holes.

As shown in Figures 3 and 4, the stopper pin 13 is provided with a handle at one end and is attached to the clamping seat at position 23 to prevent loss.

. * ·, · The ends of the branches with holes 17 in the same line are bevelled 16.

The second embodiment of Figures 5 and 6 operates with the same clamping housing 11: 25 described in connection with the first embodiment of Figures 1 to 4. Another embodiment is characterized by retrofitting an existing clamping sleeve 5 * .j .: with a radial bore 6 so as to provide a helical: *: * * · connecting piece 35 comprising a wheel 9 which is different from the center of the shaft in two parts. After mounting on the shaft, ie joining the two parts of the connection piece. 30, the pins 36 of this connecting piece 35 then extend into two radial holes opposed with respect to the clamping sleeve 5, with the pins extending inwardly toward the separation plane. The two halves of the connecting piece 35 are connected by means of two * * '· * ·' screw connections 37, each extending through the sleeve 38, which is inserted through the respective holes in the line in each part of the connecting piece 35. . · * · In the 35-pin screw connection area. The fitting sleeves 38 are used to determine each of the parts «*. · · ·. alignment and spacing accurately so that the worm gear 9 is properly geared. Both the pins 36 and the fitting sleeves 38, and thus the screw connections 37, are in the respective regions 39 extending in the axial direction of the connecting piece. In this embodiment too, the gear 40 of the worm gear 9 is shaped like a hollow groove.

• »• · 1, v; • «· • · ·:: 1.

I · I i ♦ ·· M1 * · · I · 1

Claims (14)

1. Tension means (7) for at least one torsion spring assembly (2) which is provided with a shaft (1), which shaft is pivotally connected to a door leaf - preferably a head, movable, hi or split door, such as a roof rails stored door - and whose • ·: *; ; movement is transformed into a pivotal motion, with one end of the torsion unit (2),. · ·. preferably the end facing the assigned shaft bearing is pivotally mounted. ·. and the other end is connected to a chuck (5) which is pivotable to the shaft and - after biasing the spring (2) through the rotation of the chuck (5) - is pivotally readable on the shaft, where the chuck (5) is coaxially assigned to a worm wheel (9) of a preferably self-reading worm gear (8), the worm (10) of which is operably engaged with the worm wheel (9) for tensioning the torsion spring (2) ) is stored in a tile to the shaft (1) respectively. : the chuck (5) interconnecting housing (11), and is connectable to a conventional motor driven and in particular electrically powered hand tool with rotary drive such as a hand drill, the housing (11) at least perpendicular to the two coupling on the shaft (1) and having in coupled position a crosswise arm (32) oriented longitudinally of the shaft for deflection of the reaction torque applied to the housing (11):. '' From the tensioned torsion jade (2) to a fixed support, in particular to the inside of the door '':. The upper part of the door opening lockable by the door leaf, and in which the worm wheel (9) is in the driving position, is controlled to counteract axial displacement movements relative to the chuck (5) in the position coupled to the shaft (1), characterized in that the worm wheel (9) The tooth is formed as a heel source having a substantially frusto-lateral end portion and a substantially radially leaking orifice lateral portion (18) directed from the chuck (5), the latter of which is shaped as a radially outwardly directed annular bead (18), in which axially resistant shoulder, preferably latch (19), the housing (11) engaging to read-protect against relative axial movement. Tensioning device according to claim 1, characterized in that the housing (11) comprises a shaft (1) U-shaped enclosing head part (12) and a reading pin (13) which is inserted into the end regions of the legs of the body part (15). affixed, mutually aligned heels (17) in such a way that the shaft (1) received by the step (14) with its step (14) in the coupled position between the step (14) and the legs (15) of its legs (15) is enclosed by the reading pin (13) in order to ensure an effective drive connection between the main body (12) and 12, respectively. the worm (10) and the chuck (5) stored therein, respectively. its worm (9). Tensioning device according to claim 1 or 2, characterized in that the worm wheel (9) of the worm gear (8) is coupled to the chuck (5), preferably by a flange connection. 4. Tensioning device according to claim 1 or 2, characterized in that the worm wheel (9) of the worm gear (8) is integrally formed with the chuck (5). Clamping member according to any one of claims 1 to 4, characterized in that the chuck (5) comprises means for receiving one or more manually operated levers, in particular several radially-distributed radial heels (6) for receiving :: levers in the form of rods. • · I 6. Tensioning device according to any one of claims 1 to 4, characterized in that the chuck • I! ''. (5) is formed with integral worm (9) and divided, preferably split into an axial center plane, in addition to existing torsional spring shafts. • · · * · · • · ·: T: 25 Tensioning device according to Claim 3, characterized in that the worm wheel (9) coupled to the chuck (5), coaxially and torsionally connected, preferably coupled by flange connection, is divided and preferably bifurcated in an axial center plane in and for the addition of existing torsion spring shafts. Clamping member according to any of claims 5 to 7, characterized in that the worm wheel 30 (9) is formed on a coupling element (35), which is divided into an axial center plane and comprises relatively perpendicularly oriented projections relative to the center plane. (36), which engage in the position (1) coupled to the shaft (1) in opposite-oriented radial heels (6) mounted in the chuck (5). 13 104912 Clamping member according to any of claims 5 to 8, characterized in that the split, preferably two-part chuck (5) with integrated worm (9), or the latter in particular when the worm is formed on a coupling element (35), is of the screw means (37) extending through fitting sleeves (38) in and 5 to ensure mutual spacing between the parts. Clamping member according to any one of claims 1 to 9, characterized in that the housing (11), by means of an annular projection (29), engages against a shoulder of a latch (19), which latch is formed in the periphery of the one-piece unit comprising chuck (5) and input drive link (9) respectively. the worm wheel (9) which can be coupled to the chuck (5) or the worm wheel comprising the coupling element (35), or that the shoulder and / or the shoulder respectively. the latch is mounted in the housing and the burst is placed in the chuck / worm wheel. Tensioning member according to any of claims 8 to 10, characterized in that the pins (36) and the screw means (37) are arranged in axially projecting portions (39) of the coupling element (35). Tensioning device according to any one of claims 1 to 11, characterized in that the rotary shaft (24) of the worm (8) of the worm gear (8) is formed at both ends and accessible for connection of a hand tool. Clamping member according to any one of claims 1 to 12, characterized in that the support frame (32) is longitudinally adjustable in such a way that it is directed with its end towards the housing (11) optionally insertable. in one of a plurality of bottom heels (29, 30, 31) of varying depths arranged in the steps (14) of the housing, whereby the bottom heels: [: _: (29, 30, 31) are formed for access, especially in the beds running along the longitudinal axis. : "'; directions. I« III • "i Tensioning member according to any of claims 1 to 13, characterized in that a supporting body (33) is arranged in the end of the support arm (32) directed from the housing (12); wheel or preferably ball-shaped, and rotatable about the longitudinally oriented axis (34) of a transverse shaft (1). • · · · · · · · · · · · · · · ·