EP2860144A1 - Drive for a lift system - Google Patents

Abstract

The invention relates to an elevator installation with a drive (7), with cabin (3) and a counterweight (4), which drive (7) with at least one traction sheave (12), with at least one motor (2) required for driving the traction sheave (12). 21) and with a deflection module (19) is provided. The motor (21) and the traction sheave (12) are assembled to a drive module (11). The drive module (11) and / or the deflection module (19) is further provided with suspensions for fastening a Tragmittelendbefestigung (27).

Description

The invention relates to an elevator system with a modular drive according to the preamble of the independent claim.

An elevator system aims to transport people and goods within a building between floors. A cabin serves to accommodate the people and goods.

A drive drives by means of suspension the cabin, which is thereby moved up and down in a vertically extending shaft. The suspension element connects the cabin to a counterweight. It is guided by a traction sheave. The traction sheave transmits the force required for the process or the holding to the suspension elements. The traction sheave is driven or held by a drive device and / or by a braking device.

Another type of drive drives the cabin by means of hydraulic lifting devices. The driving and holding force is acting by a pump unit directly via a piston acting, or indirectly by means of a rope or chain hoist, transmitted to the cabin.

Both drive types have specific usage characteristics and are subject to wear. The usage characteristics are, for example, the driving speed or the load for which the elevator installation is designed. Wear arises, for example, by prolonged use of the elevator system, which leads to signs of wear on components of the elevator installation. If the usage requirements change or the wear becomes too great, the drive or at least the entire elevator system must be replaced or replaced.

In order to cover the widest possible field of application when replacing existing elevator drives or entire elevator systems with a few components, universal or modular drive machines are required.

From existing writings drives are known which are small and compact, or allow variable support means taps.

So shows EP0763495 a drive machine, which causes a change in the support means distance (a) by changing the mounting inclination. As a support means distance, the distance between the accruing to the drive machine suspension element strand and the running suspension element strand is called. The drive machine shown has the disadvantage that it is dependent on a machine room with specially prepared support sockets and therefore is not suitable for installation in an existing machine room or in a shaft, a change in the support means distance (a) a change in the wrap angle (β) causes and the unit is large, which adversely affects the introduction into an existing building. The wrap angle (β) denotes the angle over which the suspension means wrap around the traction sheave. The transferable from the traction sheave on the support means force is usually dependent on the wrap angle (β).

Out WO01 / 28911 is a drive machine is known, which is compact and can be mounted inside the shaft space. The prime mover has a fixed support means distance. The disadvantage of this solution is the lack of flexibility of the drive, as it does not allow adjustment of the support means distance.

The object of the invention is now to provide a drive for an elevator installation which is suitable for the replacement of existing drives, which is optimally adaptable to existing buildings, i. that it should be able to be arranged without further structural measures in an existing engine room or within the shaft space. The support means distance should be easily adjustable and the drive should have small dimensions.

In addition, the drive for suspended elevator systems as for directly, 1: 1 hung elevator systems should be used. Of course, general aspects such as high safety standards, economic production and assembly must be taken into account.

The solution defined in the independent claim fulfills these tasks.

The elevator installation includes a drive, a carousel and a counterweight. The car and the counterweight are arranged in a vertically extending shaft oppositely arranged up and down movable. The support means connects the car with the counterweight and the support means is carried and driven by the drive by means of at least one traction sheave. The drive is provided with the traction sheave, with at least one motor required for driving the traction sheave and with a deflection module. The motor and the traction sheave are assembled into a drive module. The core function of the drive is perceived by this drive module. In general, the drive module also includes a braking device.

According to the invention, the drive module and / or the deflection module is provided with suspensions for fastening a Tragmittelendbefestigung.

Furthermore, the drive module and the deflection module can be connected to one another by means of an extension.

Furthermore, the drive module and the deflection module can be provided with identical interfaces which, together with the extension, make it possible to adapt the drive to a required carrier distance.

In addition, the drive module and / or the deflection module can be provided with connection parts which are used for fastening the drive within the shaft or in the engine room.

With this solution, the drive can be optimally adapted to existing buildings and it can - using the connecting parts - be arranged without further structural measures in an existing machine room or within a shaft. The support means distance can be easily adapted to predetermined Tragseildistanzen using the extension and the interfaces to drive and deflection module. The modular design of the drive module and deflection module as well as their ability to be fastened by means of their own connection parts allows small dimensions, as load-bearing forces are introduced directly into the building.

The connection parts are designed according to the building requirements. The drive module and the deflection module have the corresponding interfaces. The parts are thus produced efficiently and in large quantities. This results in economically optimal production conditions. By dividing it into modules and parts, the drive can be easily transported; for example, within an existing building, it can be transported with an existing elevator system close to the installation site. It is thus ideally suited for the conversion of elevator systems in existing buildings.

Another advantage is also that the installation height of the drive, regardless of the support means distance, is not changed, and thus there is no dependence of the height space requirement of the support means distance.

Further advantageous solutions are described in the dependent claims.

In an advantageous development, the drive module is provided with a guide roller. The guide roller is placed in the drive module such that it allows, regardless of the Tragmitteldistanz, a tightly defined looping of the traction sheave. This eliminates complex investment-related evidence of sufficient traction, as for the verification calculation few fixed-wrap can be considered. The drive module can be produced thereby particularly economically.

In the drive module and / or the deflection module a fastening for attachment of Tragmittelenden is integrated. This attachment is advantageously used in suspended elevator systems. All authoritative support points of the drive are thus placed in the drive itself. By the predetermined by the drive support points the entire suspension of the elevator system is added. The prime mover is therefore ideally suited for use in existing buildings, as the introduction of forces in the building is reduced to a few places.

In the drive module, a monitoring device is advantageously arranged, which monitors the correct transmission of the driving forces to the propellant. A insufficient transmission of the driving forces is determined, for example, by comparing the rotational speed of the guide roller with the rotational speed of the traction sheave. In case of decisive deviation, predefined security measures are initiated. As a result, the safety and availability of the elevator system is increased because the correct measures (maintenance request, shutdown, etc.) can be initialized case-specifically.

In an advantageous embodiment of the elevator system, this has a drive, a cabin and a counterweight. The drive is provided with at least one traction sheave, with at least one motor required for driving the traction sheave and with a deflection module, wherein the motor and the traction sheave are assembled to form a drive module. Furthermore, the drive module and the deflection module are connected to one another by means of an extension, and the drive module and the deflection module are provided with identical interfaces which, together with the extension, make it possible to adapt the drive to a required carrier distance. In addition, the drive module and / or the deflection module are provided with connection parts which are used for fastening the drive within the shaft or in the engine room.

In this elevator system, the motor may be arranged parallel-axis to the traction sheave and be connected by a drive belt with a pulley, which is arranged coaxially with the traction sheave, or
the motor may be arranged directly coaxial with the traction sheave, or the motor may be connected by means of a gear mechanism to a traction sheave shaft arranged coaxially with the traction sheave.

The connection part may be a support module, which is arranged at the interface of the drive module and / or the deflection module, which is used for fastening the drive in a machine room or on a shaft wall.

The connection part may also be a suspension module, which is arranged at the interface of the drive module and / or the deflection module, which is used for suspending the drive on a shaft ceiling, wherein the suspension module using existing openings in the shaft ceiling, or in the bottom of the overhead engine room, to the shaft ceiling is hung. The required counterparts in the engine room are made long and narrow or arranged of any shape and between existing machine bases.

Furthermore, the drive module and / or the deflection module can be provided with suspensions for fastening an auxiliary hoist
and / or the drive module and / or the deflection module are provided with suspensions for fastening a Tragmittelendbefestigung.

The belonging to the elevator system control and drive control can be arranged in the engine room, in the shaft or at another location.

One possible method for converting existing elevator systems by means of a drive for an elevator installation provides that the drive is provided with at least one traction sheave and with a motor required for driving the traction sheave, the motor and the traction sheave being assembled to form a drive module. The drive module and the deflection module are connected to each other by means of an extension. The drive module and the deflection module are provided with identical interfaces which, together with the extension, allow adaptation of the drive to a required carrier distance. The drive module and / or the deflection module are provided with connection parts, which are used for fastening the drive within the shaft or in the engine room, wherein the drive is brought in individual modules or parts in the vicinity of the installation site and assembled there to the entire drive.

Figur 1:

Beispiel einer Aufzugsanlage mit einem erfindungsgemässen modularen Antrieb, zur möglichen Anwendung bei einem Umbau;

Figur 2:

eine 3-dimensionale Ansicht eines modularen Antriebes;

Figur 3:

eine weitere 3-dimensionale Ansicht eines modularen Antriebes;

Figur 4:

eine 3-dimensionale Ansicht eines Antriebsmoduls;

Figuren 4a bis 4c:

Umschlingungsbeispiele;

Figuren 4d bis 4f:

beispielhafte Tragmittelausführungen;

Figur 5:

ein erstes Installationsbeispiel eines modularen Antriebs montiert auf einer Schachtdecke;

Figur 6:

ein zweites Installationsbeispiel eines modularen Antriebs montiert auf einer Schachtdecke;

Figur 7:

ein drittes Installationsbeispiel eines modularen Antriebs montiert unterhalb einer Schachtdecke;

Figur 8:

eine Seitenansicht eines modularen Antriebs montiert unterhalb einer Schachtdecke;

Figur 9:

ein Beispiel eines Umlenkmoduls;

Figur 10:

ein Beispiel eines Umlenkmoduls mit Verlängerungen;

Figur 11:

eine Querschnittsdarstellung eines Antriebsmoduls mit Riemenverbindung;

Figur 12:

eine Querschnittsdarstellung eines Antriebsmoduls mit direktverbundener Antriebsvorrichtung und

Fig. 13:

Darstellung eines Montageverfahrens.

In the following FIGS. 1 to 13 Advantageous embodiments of the invention are exemplified.

FIG. 1:

Example of an elevator installation with a modular drive according to the invention, for possible use in a conversion;

FIG. 2:

a 3-dimensional view of a modular drive;

FIG. 3:

another 3-dimensional view of a modular drive;

FIG. 4:

a 3-dimensional view of a drive module;

FIGS. 4a to 4c:

Umschlingungsbeispiele;

FIGS. 4d to 4f:

exemplary support means executions;

FIG. 5:

a first installation example of a modular drive mounted on a shaft ceiling;

FIG. 6:

a second installation example of a modular drive mounted on a shaft ceiling;

FIG. 7:

a third installation example of a modular drive mounted below a shaft ceiling;

FIG. 8:

a side view of a modular drive mounted below a shaft ceiling;

FIG. 9:

an example of a deflection module;

FIG. 10:

an example of a deflection module with extensions;

FIG. 11:

a cross-sectional view of a drive module with belt connection;

FIG. 12:

a cross-sectional view of a drive module with directly connected drive device and

Fig. 13:

Presentation of an assembly process.

FIG. 1 shows an elevator system 1 with a support means 2 held on the car 3, and counterweight 4, which are in a vertically extending shaft 5, opposite, movable up and down.

A mounted below a shaft ceiling 6 drive 7 carries and drives the support means 2 and held by means of the support means 2 car 3 and counterweight. 4

In the example shown, an existing elevator installation 1 with machine room 8 is provided with a new drive 7. The original required by the old engine 9 space is no longer needed for the new drive 7. As shown in the example, the old drive machine 9 can be left in the assembled state and disassembled at a later time, or the space can be used for other tasks.

A control 10 required for the new drive 7 can, as can be seen in the example, be arranged in the former machine room 8, or in the access area of a landing door, or at another location, preferably in the vicinity of the drive 7.

The new drive 7 is, as in the Fig.2 and 3 shown, modular design. A drive module 11 is provided with a traction sheave 12 for the support means 2 of the car 3 and counterweight 4, with a motor 21 required for driving the traction sheave 12 and in the example shown with a braking device 14 required for braking the traction sheave 12. The drive device 13 and the traction sheave 12 are connected to a drive module 11, as in FIG Fig. 4 exemplified, assembled.

According to the invention, the drive module 11 is provided with interfaces 15. These interfaces 15 allow the connection of connection parts 16. These connection parts 16 allow either a mounting of the drive module 11 within the shaft 5, for example, to the shaft ceiling 6 as in the Fig. 1 . 7 and 8 visible or on the floor of a conventional engine room 8 as in Fig. 5 represented or on the pedestals 17 a previously dismantled old prime mover 9, as in Fig. 6 shown.

The interfaces 15 further allow the connection of an extension 18, to which a deflection module 19 is connected as in the FIGS. 1 . 2 and 3 shown. The extension 18 together with the drive module 11 and the deflection module 19 allows adjustment of the support means distance corresponding to the requirements of the elevator installation 1. The deflection module 19 contains in turn interfaces 15 which the Connection of fasteners as used in the drive module 11 allows.

Preferably, the interface 15 of the drive module 11 and the interface 15 of the deflection module are identical. This allows for easy installation, since when attaching the extension 18 there is no possibility of confusion.

The extension 18 and the deflection module 19 are designed such that the overall height of the drive 7 by the assembly of drive module 11, extension 18 and deflection module 19 is not changed.

The interfaces 15 are designed functionally. They allow a modular composition of the drive 7 according to the requirements of the building.

An additional advantage is that the individual modules and parts can be transported separately to the installation site. As a result, the transport units are small and have a low individual weight. For example, they can be transported to the vicinity of the installation site in the building by means of an old elevator installation 9 intended for conversion.

The advantage of this invention can be seen in the fact that this drive 7 is best suited for replacing existing drives 9 by being optimally adaptable to existing buildings, i. it can be arranged both within the shaft 5 as in an existing engine room 8. The support means distance is also easily adjustable. The setting of the support means distance does not affect the overall height of the drive 7.

As in FIG. 4 shown as an example, the drive module 11 is optionally provided with a guide roller 20, which ensures a, independent of the support means distance, wrap around the traction sheave 12 by the support means 2. If the suspension element 2 is deflected using the guide roller 20, the wrap angle (β) is 90 ° to 180 °. This wrap can be changed by the arrangement of the guide roller 20. As a rule, a wrap angle (β) in the vicinity of 180 ° is desired. The drive module 11 can also directly, without Use of the guide roller 20 are used. Depending on the arrangement, this results in a wrap angle (β) of 90 ° or 180 °, as in the schematic diagrams Figures 4a, 4b and 4c shown.

The advantage of this arrangement can be seen in that the wrap angle (β) can be defined independently of the carrier mean distance.

The drive module 11 is preferably provided with a monitoring device (not shown), which monitors the correct driving force transmission from the traction sheave 12 to the suspension element 2 and / or the correct tension of the suspension element 2. In the FIG. 4 illustrated arrangement of the guide roller 20 allows control of the transmission of power by, for example, the speed of the guide roller 20 is compared with the speed of the traction sheave 12. If the two values differ noticeably from each other, there is an incorrect transmission of the driving forces.

The advantage of this design is the fact that the correct transmission of the driving force can be monitored directly on the drive 7. As a result, the security and availability of the elevator installation 1 is increased, since case-specific the correct measures (maintenance request, shutdown, etc.) can be initialized quickly.

The support means 2 has, as in the FIGS. 4d to 4f 12 has a substantially circular cross-section or has a substantially flat cross-section, the surface serving to transmit the driving force being smooth, longitudinal, serrated, studded, perforated or of any other structure, or the support means 2 has any cross-section , The traction sheave is designed such that the transmission of the driving force from the traction sheave on the support means 2 is functionally enabled.

The drive 7 is not limited to a specific support means 2. It is suitable for a variety of load-bearing profile shapes. It is advantageous if support means 2 are used, which are suitable for small deflection radii. As a result, the drive 7 can be made particularly small.

In an advantageous embodiment of the inventive drive 7, as in figure 11 illustrated, the motor 21 of the drive module 11 arranged parallel axis to the traction sheave 12, wherein the motor 21 is connected by a drive belt 23 with a pulley 22 which is arranged coaxially with the drive pulley 12. This design requires little space in the width of the drive 7 and the transmission of the drive torque is low vibration.

Alternatively, the motor 21 is arranged directly coaxial with the traction sheave 12. The advantage of this alternative is the fact that the overall length of the drive 7 is reduced.

In a further alternative, the engine 21 is connected to the transmission shaft 24 by a transmission. The advantage of this alternative is the use of commercially available translation devices.

As in the FIGS. 11 and 12 illustrated, the brake device 14 is advantageously arranged directly on the traction sheave shaft 24 or the traction sheave 12 acting. This arrangement significantly reduces the risk of brake failure, as the braking force is introduced directly into the traction sheave 12. The advantage of this arrangement is that a safety-compliant braking system for stopping and holding a car 3 with intact support means 2 can be realized inexpensively. Alternatively, the brake device 14 is arranged to act directly on the shaft of the drive motor 21. This arrangement is inexpensive because a braking device 14 can be used with low braking torque. This arrangement usually requires further, known in the market, safety measures to catch a failure of the connection of drive motor 21 to traction sheave shaft 24. Alternatively, the brake device 14 or a further braking device may be arranged on the deflection module 19.

Advantageously, the traction sheave 12 and / or a traction sheave shaft 24 and / or the pulley 22 is made in one piece. This embodiment enables a production-optimized and cost-effective design of the drive module 11.

The drive module 11 is provided with interfaces 15, which allows the attachment of several connection parts 16. The advantage of this design results from the universal applicability of the drive module 11. The interfaces 15 allow the cultivation of the required for a particular elevator installation 1 Connecting parts 16.

The interfaces 15 are, as in the Figures 3 . 4 . 9 and 10 can be seen, for example, slots or 1 or arrangements or jaws for receiving connection parts. The connection parts 16 are optionally extension 18, deflection module 19, suspension or support modules 25, 26, or suspension means end connections 27 or further aids. The design of the drive module 11 with functional interfaces 15 allows the use of the drive module 11 for many types of elevators, and this allows a rational and cost-effective production of the product.

A first advantageous connection part 16 is an extension 18, which is arranged with an end region on the interface 15 of the drive module 11, and at the other end region of a deflection module 19 is attached. The deflection module 19 has the drive module identical interface 15. By means of the extension 18 and the design of the interface 15 to the drive and deflection module adaptation of the drive 7 to the required carrier distance is made possible. Existing elevator systems 1 have a certain suspension form of the car 3 or of the counterweight 4. From this Aufhängeform results in a characterizing distance of the suspension element strand, which usually extends from the center of the car 3, in the vertical projection, to the middle of the counterweight 4.

The advantage of the extension 18 is that an adjustment of the support means distance is possible. Thus, universal drive and deflection modules can be used, which in turn allows a rational production of the drive. The deflection module 19 and the drive module 11 have the same interfaces 15. This is particularly advantageous because it increases the design options. For example, instead of the arrangement, drive module 11 and deflection module 19, two drive modules 11 can be used. As a result, the performance of the drive system 7 can be significantly increased.

The interface 15 of the drive module 11 and the deflection module 19 for extension 18 allows a fine adjustability of the Tragmitteldistanz. This advantageous embodiment allows adjustment to the actually existing carrier distance. Thus, there is no diagonal pull, whereby wear of the support means 2 is reduced. Another advantageous connection part 16 is a suspension module 25 which is arranged on the interface 15 of the drive module 11 and / or the deflection module 19, which allows the suspension of the drive to a shaft ceiling 6, or another connection part 16 is a support module 26, which the interface 15 of the drive module 11 and / or the Umlenkmoduls 19 is arranged, which allows the attachment of the drive 7 in a machine room 8 or on a shaft wall. The hanging or support modules 25,26 are advantageously provided with noise or vibration damping materials. The advantage of this embodiment is the fact that a building type appropriate attachment can be used.

The suspension module 25 uses, for example, existing openings in the shaft ceiling 6, or in the bottom of the overhead engine room 8 to hang the drive 7 to the shaft ceiling 6, wherein the counterplates required in the engine room 8 are made long and narrow, and between the existing machine bases 17 are arranged. Depending on the design of the machine room 8, the counter plates may have other shapes, as they result usefully for the arrangement. For example, they can be round if required.

Particularly advantageous in this embodiment is that any machine base 17, which were used to attach an old drive 9, can be left. This reduces the conversion time and the associated costs.

The drive module 11 and / or the deflection module 19 is advantageously provided with suspension means end connections 27. The advantage here is that the interfaces are reduced to the building, since all supporting forces from the car 3 and counterweight 4 are performed on the drive unit 7 and are introduced via the suspension points of the drive 7 in the building.

The arrangement of the suspensions allows the use of a 2: 1 umhängängten arrangement in elevator systems 1, which were hung in the old version directly, or 1: 1. This arrangement is made possible by a particularly advantageous design of Tragmittelendverbindungen.

In a meaningful supplement, the drive module 11 and / or the deflection module 19 is provided with an interface 15 for fastening an auxiliary hoist 28. The auxiliary hoist 28 is used for installation-related process of elevator material and / or installation personnel. This supplement allows a particularly efficient sequence of assembly of the inventive drive 7, as in the FIG. 13 exemplified.

The drive 7 is transported by means of the old elevator installation 1 in the vicinity of the installation site and completed there with the necessary connection parts 16. The old cab 3 is now set and secured in the vicinity of the top stop and the old support members are dismantled. Now, the drive 7 is preferably lifted using the existing cable bushings and an attached in the engine room 8 drawbar 29, to the shaft ceiling 6 and secured by means of suspension module 25. An auxiliary hoist 28 is now attached to, provided on the drive 7, interface 15. With the help of this auxiliary hoist 28, the cab 3 can now be moved and any components of the old engine room equipment, such as drive machine, control boxes, etc., can be transported by means of the auxiliary hoist 28. If the replacement of the remaining manhole equipment, depending on the conversion agreement replaced, the new support means 2 can be retracted, the auxiliary hoist 28 can be removed and the elevator system 1 is again available to the customer after a short conversion time. This described conversion process is just one possible example. It shows the advantageous use of the inventive drive 7.

A supplementary embodiment prefers that the attachment Tragmittelendverbindung 27 is provided with a monitoring for detecting the suspension medium tension. The advantage of this design is that suitable measures can be initialized in the event of a deviation of the suspension element tension, such as, for example, a request by a service person or a shutdown of the elevator installation 1 before an unsafe operating state arises.

The elevator 10 associated with the control and / or drive control is advantageously arranged in the engine room 8. Alternatively, it can also be arranged wholly or partly in the shaft 5 or in an easily accessible location, preferably in the vicinity of the drive.

When converting existing elevator systems 1 a machine room 8 is often available. The engine room 8 can not be used otherwise as a rule. Thus, a use of the machine room 8 for the arrangement of the new controller 10 and / or drive control offers. The electrical connection to the drive 7 is usually possible simply by existing openings in the shaft ceiling 6. It is particularly advantageous that an existing engine room 8 is used meaningful. Depending on the existing arrangement or possible use of the machine room 8, the best arrangement of the controller 10 and / or the drive control can be selected.

The illustrated embodiments and methods are examples. Combinations are possible. For example, the illustrated drive and deflection modules can also be used individually.

Claims (10)

Elevator installation with a drive (7), with cabin (3) and a counterweight (4), which drive (7) with at least one traction sheave (12), with at least one motor (21) required to drive the traction sheave (12) and a deflection module (19) is provided, wherein the motor (21) and the traction sheave (12) are assembled to a drive module (11), characterized in that the drive module (11) and / or the deflection module (19) with suspensions for attachment a Tragmittelendbefestigung (27) is provided. Lift installation according to Claim 1, characterized in that the drive module (11) and the deflection module (19) are provided with interfaces (15) which, together with an extension (18), allow adaptation of the drive (7) to a required carrier distance. Elevator installation according to claim 1 or 2, characterized in that the drive module (11) and the deflection module (19) by means of the extension (18) are interconnected. Lift installation according to one of Claims 1 to 3, characterized in that the drive module (11) and / or the deflection module (19) are provided with connection parts (16) which are used to fasten the drive (7) inside the shaft (5) or in the Engine room (8) are used. Elevator installation according to one of claims 2 to 4, characterized in that the interface (15) of the drive (11) and the deflection module (19) enables a fine adjustability of the carrier center distance. Elevator installation according to one of claims 2 to 5, characterized in that the interfaces (15) are slots, hole arrangements or clamping jaws for receiving connection parts (16). Elevator installation according to one of the preceding claims, characterized in that the carrying means end fastenings (27) are provided with a monitoring for Determining the suspension medium voltage are provided. Elevator installation according to one of the preceding claims, characterized in that the drive module (11) is provided with a guide roller (20) which ensures a wrap angle (β) of the traction sheave (12) independent of the support means spacing by the suspension means (2), wherein the wrap angle (β) is 90 ° to 180 °. Elevator installation according to one of the preceding claims, characterized in that the drive module (11) is provided with a monitoring device which monitors the correct transmission of driving force from the traction sheave (12) to the suspension element (2) and / or the correct tension of the suspension element (2). Elevator installation according to one of the preceding claims, characterized in that the drive module (11) and / or the deflection module (19) is provided with suspensions for fastening an auxiliary hoist (28).

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