HOSCH A1 User manual

TYPE A1
Installation and
Operation Manual
HOSCH
SPRUNG
BLADE
SCRAPER

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Important information
This manual is intended to help you install and operate this device safely and effectively. Read this
manual before installing and operating the device.
Pay particular attention to all warnings and cautions throughout this manual. If you do not obey all the
warnings and procedures in this manual, it can lead to serious damage to property and/or cause
injury to personnel. If there is any safety instruction or procedure that you do not understand, do not
use the device. Contact your supervisor or the relevant safety manager.
This device has to be installed and operated only for its intended use to prevent damage and injuries.
All required actions have to be carried out by people who have been properly trained.
It is the user's responsibility to make sure that the device is only used in full accordance with the rules
and regulations of the relevant site.
The following conditions are required:
1. Competent configuration of the device for intended use only
2. Installation of the device according to this installation and operation manual
3. Operation of the device under released operating conditions
4. Periodic maintenance according to the manufacturer’s instructions
Optional operating conditions
If the device is to be installed in different operating conditions than those specified above, consultation
with HOSCHis required. The operation of the device outside the above stated operating conditions
can lead to serious damage to property and/or to possible injury.
Do not use the device in its standard version in explosive environments (ATEX). For special versions
please contact HOSCH.
Installation and Operation Manual Type A1
500 mm to 1,200 mmBelt width
Up to 3.5 m/sBelt speed
Rubber or PVC, with a flat surface, hardness recommended > 60 Shore-ABelt type
Vulcanized belt joints. The cover hardness of the spliced area should not
deviate more than 5 Shore-A from the undisturbed section.
Belt splice
-20°C to +80°CAmbient temperature
Unidirectional (no reversing operation)Direction of belt travel
Intended use
Use
The HOSCH Sprung Blade Scraper Type A1 cleans conveyor belts from adhering bulk material
before it enters the conveyor line. The scraper Type A1 is installed on the lower belt behind the
discharge pulley.
General operating conditions
Item Conditions
SAFETY

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Installation and Operation Manual Type A1
SAFETY (Continued)
Modifications to Parts
Do not attempt to make any modifications or alterations to the device regarding the configuration,
installation, operation and maintenance without written approval from HOSCH. Unauthorised modifi-
cations or alterations to the device could lead to serious damage to property and personnel.
General Danger Notice
During operation, unexpected deflection movements may occur. Danger of entrapment exists. The site
operator should guard the mountings (railings, danger signs, etc).
The wearing of scraper parts may cause sharp edges. The risk of injury during installation or
maintenance exists.
Prevent the scraper from unintentional pivoting.
Due to the friction that occurs during operation, the blades or module tips are likely to become very
hot. Touching them immediately upon stopping the belt can lead to serious burns.
The contact between the blades or modules and the running conveyor belt can create static electricity.
Be cautious when touching the device! Attention: Sparking may occur through discharge.
Mineral or metallic particles may collect on the belt surface and, in exceptional cases, cause sparking
when passing the blades or modules.
The weakened structures of worn parts are likely to break. To guarantee personal and conveyor safety,
these parts have to be replaced with new ones.
Safety precautions during installation and maintenance work
Carry out installation or maintenance work on the scrapers only after the conveyor belt has been
stopped and "locked-out". The working area has to be isolated. Do not begin any work that has not
been previously authorised by a responsible person.
Protective clothing, in particular safety boots, gloves, helmet and protective glasses are mandatory.
An authorised work permit from the relevant manager must be obtained prior to any welding and
cutting work.
When working at heights, provide safety devices, for example scaffolds, railings, guard nets, safety
harnesses. The devices must have been inspected and released as fit for work.
Prior to operating the scraper, ensure that the site is completely cleared. All equipment or parts, such
as scaffolds, lifting gears, tools etc. should be removed from the area prior to restarting the conveyor
belt. Safety devices (hoods, guards etc.) that may have been dismantled must be refitted.
All screwed connections are to be checked and secured before each stage of commissioning and after
each service. Security components (spring washers, counter nuts) should not be re-used. They must be
replaced with new parts. In case of mechanical damage, e.g. corrosion, new parts must be installed.
Only original, genuine HOSCHparts should be used.

E
D
A CB
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Installation and Operation Manual Type A1
DESCRIPTION
A Cleaning blade with 15° inclination DMounting with tensioning unit
B Tensioning element EMounting
C Assembly carrier
Design
The HOSCH Sprung Blade Scraper Type A1 is used as a main scraper. The modules are designed in a single
row with 15° inclination, they are overlapping and spring-loaded. The modules consist of a blade and a
tensioning element.
Function
The centrepieces of the scraper are its modules (A+B). The blades (A) are reinforced with tungsten carbide
cleaning tips. During operation, the tungsten carbide cleaning tips are kept in contact with the belt surface by
the tensioning elements (B).
The assembly carrier (C) is fixed within the mountings (D+E) and is turnable.
The mountings are bolted to the belt conveyor frame. The distance between them should be kept to a minimum
to provide maximum support.
List of tools
For the scraper installation and maintenance the following tools are required as a minimum:
• 2 of ring/open-end spanner 13 mm
• 2 of ring/open-end spanner SW 19
• 2 of ring/open-end spanner SW 24
• 1 of switch lever drill 1/2“
• 1 of wrench socket 19 mm
• 1 of extension 1/2“
• 1 of assembly lever
• 1 of measuring tape 2 m
• 1 of fitter's square
• 1 of hand-brush
• 1 of wire brush
• 1 of one-hand right-angle grinder
• 1 of marker pen

~100>300
100
-130
130
30
PA
PB
PC
80
200
80
60
PC
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Installation and Operation Manual Type A1
INSTALLATION
1. Determine the installation position
1. Position the cleaning tips of the modules approx. 100 mm
behind the nip point PA at point PB.
2. Mark point PB outside the chute on both sides of the belt
conveyor frame.
3. Starting from point PB, determine the centre point of the
assembly carrier PC on the frame construction. The
measures are always to be marked parallel and vertically
to the belt direction.
Note:
Make sure that there is sufficient free space behind the
scraper to the next construction parts, e.g. roller or chute
(minimum space requirement = 300 mm).
2. Cut out the installation hatch
1. Measure and mark the installation hatch relative to the
point PC.
2. Cut out the hatch.

PC
17
70
140
50
135
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Installation and Operation Manual Type A1
3. Determine the position of the mountings
1. Determine the position of the mountings from the assem-
bly carrier centre point PC.
2. The mountings should preferably be installed at solid
unbendable conveyor frame parts, e.g. beams.
4. Install the mountings
Install the mountings on both sides.
INSTALLATION (Continued)

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Installation and Operation Manual Type A1
5. Assembly of modules
1. Insert the blade (1) turned by 90° into the tensioning
element (2) as far as it will go.
2. Align the cleaning tip (3) parallel to the tensioning element.
The cleaning blade is now locked with the tensioning
element.
6a. Install the modules
1. Push the module (1) into the C-shaped mounting plate of
the assembly carrier (2) and push it to the right up to the
stop (3).
2. Fasten the modules with the clamp screw (4) and secure
with the counter nut.
INSTALLATION (Continued)

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6b. Install the assembly carrier
1. Loosen the fastening screw (1) of the assembly carrier
locking device with tensioning unit (2) and pull off the
assembly carrier locking device.
2. Slide the assembly carrier over the C-hook (3) into the
rear assembly carrier locking device.
3. Push the assembly carrier locking device onto the
assembly carrier tube and fasten it again with the
fastening screw.
Installation and Operation Manual Type A1
INSTALLATION (Continued)

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INSTALLATION (Continued)
7. Centre the assembly carrier
1. Turn the assembly carrier until the tips of the cleaning
blades contact the belt surface.
2. Align the assembly carrier parallel to the belt and centre
it.
3. Adjust the threaded rod of the tensioning unit to a
projection of approx. 15 mm and tighten the clamp
screws (1) of the tension lever (2).
Installation and Operation Manual Type A1

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8. Pre-tension the assembly carrier
1. Pre-tension the threaded rod by 25 mm using the
adjusting nut (1).
2. Lock the position with the counter nut (2).
Note:
If the belt is lifted significantly during the tensioning
process, use the adjusting nut to pre-tension the scraper
further, or provide a counter-pressure roller.
Installation and Operation Manual Type A1
INSTALLATION (Continued)

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INSTALLATION (Continued)
9. Check the installation
Retighten all hardware (1) and check locking.
Check free movements and function of all components.
Check the installation using the installation checklist (2).
Note: Assembly carrier tube ends that protrude into the path can be shortened up to the mountings.
10. Trial run
For checking the correct function of the scraper the following test runs are required:
1. Test the scraper function by running in an unloaded condition (min. 15 minutes).
Observe the scraper in particular during the passing of belt splices and belt patches. To obtain the best
possible control results, this test run should last for at least 15 min.
2. Test the scraper function, run with a loaded conveyor belt (min. 30 minutes)
Check the cleaning results, if necessary make readjustments only after the conveyor belt has been isolated.
Due to the changing load of the belt or changes in the consistency of the conveyed material this control
should last for at least 30 min.
Make sure that there are no persons in the dangerous areas of the conveyor. Pay attention to the rules
on how to restart the conveyor belt safely.
Installation and Operation Manual Type A1

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Installation and Operation Manual Type A1
MAINTENANCE
Working position of the installed scraper
The scraper can be quickly and easily removed and serviced outside the conveyor system. When reinstalling it,
the previous working position can be easily restored. The procedure is described in the following steps.
A. Release scraper pretension
Loosen the adjusting nut (1) of the tensioning unit until the cleaning tips are no longer in contact with the belt.
Do not change the position of the counter nut (2).

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Installation and Operation Manual Type A1
MAINTENANCE (Continued)
B. Remove the assembly carrier locking device
1. Remove the fastening screw (1) of the assembly carrier locking device with tensioning unit (2).
2. Pull the assembly carrier locking device together with the assembly carrier off the guide bolts (3). The
assembly carrier is now held by the C-hook (4) of the mounting.

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Installation and Operation Manual Type A1
MAINTENANCE (Continued)
C. Remove the assembly carrier
1. Turn the assembly carrier by approx. 30° and pull it out of the transfer chute over the C-hook. Press on the
assembly carrier from above to keep it balanced.
Note:
For very short assembly carriers, the lever arm can be extended by inserting a tube into the assembly
carrier.
As an option, HOSCH offers an insertable assembly carrier extension as an installation aid.

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Installation and Operation Manual Type A1
MAINTENANCE (Continued)
C. Remove the assembly carrier (Continued)
1a. Fit the optional installation aid
Insert the adapter (1) for the extension tube (2) into the assembly carrier tube and clamp it with the screw
(3).
Insert the extension tube into the adapter and snap it into place.
The assembly carrier can now be guided more easily during removal.

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MAINTENANCE (Continued)
Installation and Operation Manual Type A1
D. Carry out maintenance work on the scraper
1. Clean the scraper, check the function of the spring elements and the wear condition of the cleaning
blades.
2. Replace worn cleaning blades and spring elements. To do this, turn the cleaning blades by hand 90° in
the elements and pull them out (see illustration).
3. The installation is done in reverse order.
Note:
When inserting the assembly carrier into the conveyor system, make sure that the cleaning blades
are aligned parallel to the assembly carrier and do not turn out of position.

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MAINTENANCE (Continued)
Installation and Operation Manual Type A1
E. Pre-tension the scraper
Turn the adjusting nut (1) of the tensioning unit until the counter nut (2) comes into contact. If the position of the
counter nut has not been changed, the scraper is back in its original working position.

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MAINTENANCE AND SERVICE (Continued)
To maintain maximum efficiency and performance, the scraper unit needs to be serviced regularly.
Always pay attention to the necessary safety requirements during all service work on scrapers and
conveyor belts.
First inspection
After the first full day of operation, the scraper should undergo a visual inspection. Please check the
scraper function, the cleaning performance, the material flow and vibration-free operation. Further-
more, the belt surface, the belt splice and belt patches must be inspected.
Scheduled maintenance
Follow-up inspections of the scraper should be made regularly. The inspection intervals are variable,
depending on the operating conditions of the scraper. The scope of the inspection is the same as for
the first inspection. Additionally, the condition of the cleaning tips (PU or tungsten carbide) must be
checked and, if required, any material build-up must be cleaned off the scraper. Care should be taken
when handling the cleaning tips to prevent causing damage to the tips.
Attention: Damaged cleaning tips might damage the belt surface and reduce the cleaning perfor-
mance.
Maintenance
Under normal operating conditions carry out an inspection every 8 to 12 weeks. If necessary carry out
any maintenance work required. Please contact HOSCH for all questions about maintenance intervals
and required maintenance steps.
Maintenance steps
1. Clean all scraper components.
2. Check function of all components.
3. Check the corrosion protection and repair if required.
4. Check the wear of all components that are in the path of the materials on the conveyor belts.
5. Replace worn or damaged components by using original HOSCH spare parts.
6. Prior to reinstalling any used blades or modules with tungsten-carbide cleaning tips, be sure to
round off the sharp edges.
7. For installation or reinstallation, please follow the instructions in this manual.
8. Check all the hardware.
9. Perform a trial run.
Installation and Operation Manual Type A1

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MAINTENANCE AND SERVICE (Continued)
Technical alterations
The device is subject to technical modifications and can contain modified components.
HOSCH service
Upon request, the HOSCHservice department can coordinate the required inspection and service
work. HOSCHservice staff are available world-wide to carry out the work. In addition, HOSCH
offer customer training seminars on the selection, installation, inspection and service of its conveyor
belt cleaning and tracking systems.
Notes
Sketch
Installation and Operation Manual Type A1

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The contents of this document may be subject to technical modifications
52931 - 111021 - en
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© HOSCH Fördertechnik Recklinghausen GmbH
No part of this publication may be reproduced, transmitted, transcribed, stored in any retrieval system or translated into any human or computer language by any means or
in any form, without the prior written permission ofHOSCH Fördertechnik Recklinghausen GmbH. Contravention of the owner's copyright may also reduce the ability of
HOSCH Fördertechnik Recklinghausen GmbH to provide effective support for its equipment.
HOSCH Fördertechnik Recklinghausen GmbH reserves the right to make changes without notice to both this document and to its products described within this document.
Nothing in this publication represents any contractual orother commitment on the part of HOSCH Fördertechnik Recklinghausen GmbH and should not be taken as such.
All possible care has been taken in the preparation of this publication.
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