Montech SH User manual

OPERATING INSTRUCTIONS
Safety Devices
Protective hood: SH
Edition: BA-100025
03/2008

Important information
EC Declaration of Conformity (CE).........................................1
Scope of these instructions.....................................................2
Technical data and hints on use.............................................3
Commissioning
Transport guards..................................................................4
Handling the pillars of the hoods ...........................................5
Mounting the hood ...............................................................6
Rigidity of the hood ..............................................................6
Mounting the panes..............................................................7
Hood with reinforcing struts...................................................8
Hood with cover...................................................................8
Actuating the hood with the framing profile............................9
Equalizing weights..............................................................10
Altering the equalizing weights............................................11
Mounting the safety switch ..................................................12
Drop guard........................................................................14
Retrofitting of drop guards ..................................................15
Maintenance
Replacing the belts..............................................................20
Adjusting the play of the guide rollers ..................................21
Spare parts lists showing materials and suppliers
Supporting spar left/right....................................................23
Mounting the supporting spar profile....................................26
Guide roller holder.............................................................28
Bearing pedestal left/right...................................................30
Belt with holder ..................................................................32
Safety switch......................................................................33
Drop guard........................................................................34
Accessories for the hood .....................................................35
General notes
Environmental compatibility and disposal.............................36
Contents

Important information
1
EC Declaration of Conformity (to MRL Appendix II A)
Rules and standards complied with:
• Guidelines for machinery 89/932/EEC, 91/368/EEC
Manufacturer
Montech AG Tel. 032 / 681 55 00
Gewerbestrasse 12 Fax. 032 / 682 19 77
CH-4552 Derendingen
Description of the product and its use
The protective hood SH is a MOVABLE, SEPARATING PROTECTIVE
DEVICE as specified in EN 292-2, para. 4.2.2.3 and is used to
safeguard an action space which could give rise to a hazard.
Hazards
Under all circumstances, attention must be paid to the load limits given
under the heading “Technical data and hints for use”.
Additional information
The aim of the present User Manual is to enable users to employ the
protective hood SH correctly and safely. Should further information be
required in relation to your particular application, please contact the
manufacturer.
When reordering User Manuals, it is essential to quote the reference
number, the product name and serial number.
This document can be obtained from our homepage
www.montech.com.

Important information
2
Fig. 1-1: Description of type plate
Reference number Product name
Serial number
Montech AG
Management
U. D. Wagner C. Wullschleger
Validity of the User Manual
Our products are continually updated to reflect the latest state of the
art and practical experience. In line with product developments, our
User Manuals are continually updated.
Every User Manual has an order number (e.g. BA-100025) and an
edition number (e.g. 03/2008). The order number and the addition
number are shown on the title page.

3
Important information
Technical Data and Hints for use
Nominal stroke (mm) *
Own weight per pillar (kg) *
Attached weight per pillar (kg) *
Torque Mxz max. (Nm) *
Myz max. (Nm) *
Permissible number of opening and
closing strokes with an attached
load of 20-25 kg per pillar 30/h
Ambient temperature (°C) 10...50
*These data are specific to the order concerned and shown on the nameplate
(300, Fig.16) mounted on the bearing pedestal (10 in Fig.16).
The hood must be opened and clo-
sed in such a way that no hard
impact occurs at the end stops. Hard
striking of the end stops shortens
their life, causes vibration in the
machine and may lead to the failure
of mechanical parts.
If the attached load exceeds 25 kg/pillar and/or if the number of
opening and closing strokes is more than 30/h, the drop guard
Ref.No. 43236 (Fig.24) must be fitted.
Myz
Mxz
Z
X
Y
Fig. 2

4
Commissioning
Transport Guard
In the state as delivered, every pillar of the protective hood is locked in its clo-
sed position by transport guard elements, which prevent the supporting spars
(20, Fig.16) from being moved.
Every time a hood is transported these guards must be fitted to secure the
moving parts.
Fitting the transport guards
On both pillars of the hood proceed as follows:
•If the columns are equipped with drop guards (43236, Fig. 12), the drop
guards must be secured by mounting the assembly aids (45459, Fig. 12) to
prevent unintentional catching.
•Move the supporting spar (20 in Fig.16) down and push the rod (120,
Fig.16) through the holes provided for it in the spar until it projects about
15 mm out at both ends. The guide roller holder (30, Fig.16) located bet-
ween the stop (230, Fig.16) of the supporting spar and the inserted rod
(120, Fig.16) secures the spar.
•To fix the counterweights of each pillar insert the rod (130, Fig.16) through
the hole through the bearing block (10, Fig.16) until it strikes the counter-
weight. The rod is then secured by tightening the screw (190, Fig.16).
To remove the transport guard
Caution: Before removing the transport guard, make sure the hood is properly
attached to the supporting spars (20, Fig.16) and that half the weight of the
hood is equal to the mass of the counterweight of each pillar to within 2 kg.
•Undo screw (190, Fig.16) so that the rod (130, Fig.16) can be pulled out at
the top.
•Pull out the rod (120, Fig.16).
•If the columns are equipped with drop guards (43236, Fig. 12), the assembly
aids (45459, Fig. 12) must be removed by loosening and unscrewing the two
M5 screws.

5
Commissioning
Handling the pillars of the protective hood
Fig. 3 Ring screw
M8, DIN 580
10 (Fig. 16)
300 (Fig. 16)
To transport the pillar a ring screw as per Fig.3 should be screwed into the
tapped hole provided (10, Fig. 16). The weight of the pillar is shown on the
nameplate (300, Fig.16).

6
Commissioning
Mounting the Hood
Since the hood stands on only two pillars, it must be secured by appropriate
means to prevent it toppling.
Optimal stability is obtained with a structure in which the pillars of the hood
are integral parts of the machine support. Fig.4 to 6 show examples of sup-
ports made of Quick-Set fixing elements.
Rigidity of the Hood
The synchronous shaft 47951 (Fig.16) allows the spars (20, Fig.16) to be
moved synchronously.
The superficial rigidity is assured by framing the upper and lower edges of the
pane in framing profiles 43943 as shown in Fig.4. To improve the strengt-
hening struts 45327/... as in Fig.5 may be used.
The maximum rigidity is obtained by screwing on a plastic cover as in Fig.6.
But owing to the heavy weight of the cover, this variant is not recommended for
retrofitting.

44633
44633
20 (Abb. 16)
505006 43943502614
7
Commissioning
Mounting the Panes
Fig. 4
20 (Fig. 16)

505006
43943
502614
45327/…
504381
8
Commissioning
Hood fitted with strengthening struts
Hood with cover
Fig. 5
Fig. 6

9
Commissioning
Actuating the pane at the framing profile
If framing profiles are provided and mounted as shown in Fig.4, they may be
used to actuate the pane as in Fig.7.
Fig. 7

10
Commissioning
Equalizing Weights
With the equalizing weights (43532, Fig. 16) a balance is obtained
between the mass of the hood and that of the counterweights. Once a state of
equilibrium has been reached, the hood can be set to any desired position
only by the application of an external force.
If the hood moves upwards of its own accord, the counterweight is too heavy,
i.e. equalizing weights have to be removed.
If the hood moves downwards of its own accord, the counterweight is too light,
i.e. equalizing weights have to be added.
The equalizing weights (Ref.No. 43532, m = 0.5 kg) are removed or inserted
by means of the openings at the side of the pillars (50 in Fig. 16).
•Remove covers (100, Fig. 16) by loosening the raised fillister-head screws
(320, Fig. 16).
50 (Abb. 16)
100 (Abb. 16)
320 (Abb. 16)
Fig. 8
When the cover (100, Fig.16) is removed, there is a grave risk of
fingers being squeezed or cut in the opening (50, Fig.16) in the
pillar.
50 (Fig. 16)
320 (Fig. 16)
100 (Fig. 16)

11
Commissioning
•Move the hood only so far that the upper edge of the weights is roughly in
the middle of the opening.
•Remove equalizing discs singly by hand or insert them with the slit forwards
(as in Fig.16). After an insertion or removal check whether the hood does
stand still in any desired position. If this condition is satisfied, the hood and
counterweight are in equilibrium.
•Replace the covers (100, Fig.16).
Altering the Equalizing Mass
If equilibrium cannot be obtained by adding or removing equalizing weights,
the basic weight (90, Fig.16) must be exchanged.
This operation may only be carried out by the manufacturer!

Mounting the safety switch
A safety switch must be mounted on one of the two pillars of each hood (as
per Fig.23).
The safety limit switch (10, Fig.23) is fixed to a plate (20, Fig.23) with screws
(50, Fig.23). The plate with the safety switch can be fixed with the clamping
element (40, Fig.23) either to the external dovetail of the pillar (50, Fig.16) as
shown in Fig.10, or to the external dovetail of a strut perpendicular to the pillar
(50, Fig.16) in a suitable position as shown in Fig.11.
A tightening torque of 6 Nm must not be exceeded when tightening the screws
of the clamping element (40, Fig.23).
The actuating arm of the safety switch must be fixed to the holder (70, Fig.16)
or, if the hood has a drop guard, to the support (10, Fig.24).
•When a "Guardmaster" safety switch is used, the actuating bracket is fixed
to the holder (70, Fig. 16) or to the support (10, Fig. 24) of the drop guard,
using the plate (30, Fig. 23).
•When a "Schmersal" safety switch is
used, the actuating bracket is fixed
directly to the holder (70, Fig. 16) or
to the support (10, Fig. 24) of the
drop guard.
12
Commissioning
Fig. 10

13
Commissioning
The safety switch must be positioned so that the actuating arm engages in the
slit in the switch housing when the hood is closed, thereby actuating the switch.
The safety switch must be electrically connected so that the hazardous device is
switched off at once when the hood is opened and cannot be switched on
again before the hood is closed.
Fig. 11

14
Commissioning
Drop Guard
The drop guard prevents the hood from dropping down if the belt (40, Fig.16)
or its mounting (110, 140, Fig.16) breaks.
If the tensile force of the counterweight transferred by the belt to the bracket
(20, Fig.24) becomes ineffective for any of the reasons given, he energy stored
in the two springs (50, Fig.24) forces the bracket downwards.This movement
actuates the two pawls (30 and 40, Fig.24), which immediately engage in the
dovetail of the pillar (50, Fig.16).
If the drop guard is triggered for the reasons mentioned above, it can be
unlocked again with the assembly aid 45459 (by inserting it as described
on the next page). It is important to check the pillar (50, Figure 16) for
injuries. If the claws of the two pawls have left traces, they must be
repaired with a file.
Drop guards can be retrofitted instead of the holders (70, Fig.16).See “Retrofit-
ting of drop guards”.

15
Commissioning
140 (Abb. 16)
110 (Abb. 16)
40 (Abb. 16)
43236
45459
Retrofitting of Drop Guards
Retrofitting of drop guards may only be carried out by qualified persons.
On both pillars the holder (70, Fig.16) has to be replaced by a drop guard.
Procedure:
•Lower the hood as far as the stop.
•Secure the hood in this position. To do this insert the rods (120, Fig.16) in the
two supporting spars (20, Fig.16). See under “Transport guard”.
If necessary, parts of the hood may have to be removed to improve accessibility.
Fig. 12 140 (Fig. 16)
110 (Fig. 16)
40 (Fig. 16)

16
Commissioning
•Push the assembly aid (45459, Fig.12) with the pins first into the holes
(10 mm dia.) of the drop guard support until resistance is encountered.
•Press the assembly aid further against the spring pressure, until the plate of
the aid is against the support of the drop guard.
•Screw in the two screws (M5) and tighten them.
•Fit the holding devices 45515 for the belts on both pillars as shown in
Fig.13. By slightly lifting the belt as per Fig.13a, the holder (2,Fig.13) with
the countersunk screws (6, Fig.13) can be held behind the belt and pushed
as far as possible against the bearing block.
•Place the plate (1, Fig.13) over the countersunk screws (6, Fig.13). By
screwing and tightening the knurled nuts (5, Fig.13), the holding devices
45515 are each joined positively to a belt (Fig.13).
•Press synchronous shaft (47951, Fig. 16) about 10 mm away from the bea-
ring block (10, Fig. 16) and turn the shaft (30, Fig. 21) with a wrench (size
12) according to Fig. 13c through an angle of about 15-20° until the shims
(3, Fig. 13) can be placed between the holding device and the bearing block
in both columns, Fig. 13c.
When the shaft (30, fig 21) is released, the belt is held by the holding device.
The end of the belt leading to the holder (70, Fig.16) is thereby loosened.

17
Commissioning
62
10, Abb. 16
2
615
3
3
1
45515
Fig. 13
a)
c) d)
b)
10 (Fig. 16)

18
Commissioning
•By slackening and turning out the screws (150, Fig.16), remove the holder
(70, Fig.16) and bushes (80, Fig.16) from the supporting spar (20, Fig.16).
•By slackening and turning out the countersunk screws (140, Fig.16), remove
the holder (110, Fig.16) from the belt.
•Mount the belt as per Fig.12 on the drop guard, making sure the holder
(110, Fig.16) engages in the second or third tooth from the end as in Fig.14.
This means that the last tooth of the belt is not gripped by the holder.
110
140
Fig. 14
•With the holder in the right place attach the belt in the fixing position of the
drop guard as per Fig.12, so that the countersunk screws can be screwed
into the tapped holes provided for them.
The screws (140, Fig.16) must be tightened with a torque of 1.5 Nm.
•Mount the drop guard on the supporting spar (20, Fig.16) in the same place
as the holder (70, Fig.16).
•Lay the bushes (80, Fig.16) in the recesses provided for them in the support
(10, Fig.24).
•Tighten the screws (150, Fig.16) with a torque of 21 Nm.