CN209504229U - A kind of silk screen cutting machine - Google Patents

Abstract

The utility model discloses a kind of silk screen cutting machines, belong to cutter device field, it include workbench, wind component, cutting assembly and pressure assembly, the top of workbench is arranged in the cutting assembly, the pressure assembly and winding component are arranged at the side of workbench, the other side of the workbench is equipped with and unreels component, the cutting assembly includes portal frame, cutting part, graduated scale, screw rod slide unit and for driving cutting part in the shifting material component of transverse shifting, spaced L-type clamping plate there are two being set on the side wall of the portal frame, the slider top of the screw rod slide unit is equipped with tuning drive gear.The utility model passes through the silk screen width after observing the cutting that graduated scale enables worker precisely to calculate in advance, and pressure operation can be carried out to the silk screen in winding automatically by pressure assembly, pushing operation is carried out to silk screen manually without worker, worker is avoided because of manual pressure and brings biggish security risk to it.

Description

A kind of silk screen cutting machine

Technical field

The utility model relates to cutter device fields, more particularly, to a kind of silk screen cutting machine.

Background technique

In the prior art, on the one hand wire mesh has good strainability as filter screen, on the other hand again because of it Intensity with higher and stronger corrosion resistance and be widely used in large-scale chemical industry equipment, in answering for wire mesh In, the wire mesh of strip be cut into according to the size of chemical industry equipment by different sizes, then customized again together It uses, traditional cutter device is difficult to precisely for silk screen to be cut into the size of two parts of needs, and the silk screen after cutting often has ruler Very little situation devious brings trouble for worker, and when to the cutting of wire mesh, worker is generally by wire mesh It moves to below cutter, worker pushes down silk screen with hand and cuts blade pushing, and silk screen is avoided to generate during cutting Offset, but the operation is easy to damage in the hand of operator, or even finger is cut off.

Therefore it provides a kind of silk screen cutting machine, make the silk screen that silk screen is precisely cut into two parts of specified sizes and can Automatically the technical issues of pressing silk screen to become those skilled in the art's urgent need to resolve.

Utility model content

The purpose of this utility model is to provide a kind of silk screen cutting machines, to solve in the prior art not cutting silk screen At two parts of specified sizes silk screen and be difficult to the technical issues of pressing automatically to silk screen.

The utility model provides a kind of silk screen cutting machine, includes workbench, winding component, cutting assembly and pressure group The top of workbench is arranged in part, the cutting assembly, and the pressure assembly and winding component are arranged at the side of workbench, The other side of the workbench is equipped with and unreels component, and the cutting assembly includes portal frame, cutting part, graduated scale, screw rod Slide unit and for driving cutting part in the shifting material component of transverse shifting, the sliding block bottom of screw rod slide unit is arranged in the cutting part Portion, the screw rod slide unit are arranged on the side wall of portal frame, set on the side wall of the portal frame there are two spaced L-type press from both sides Tight plate, the graduated scale are horizontally arranged on two L-type clamping plates, and the slider top of the screw rod slide unit is equipped with tuning drive gear.

Further, the cutting part includes the first vertical plate and for being arranged at intervals on the slider bottom of screw rod slide unit Two vertical plates, first vertical plate are equipped in installation axle horizontally disposed and with the rotation connection of the first vertical plate, the installation axle End sleeve be equipped with round cutter, rotary electric machine on the side wall of second vertical plate is arranged on the output end of the rotary electric machine There is first gear, second gear engaged with the first gear is arranged in the installation axle.

Further, shifting material component include there are two spaced guide rail, be equipped on each guide rail with The top of two sliding shoes is arranged in its sliding shoe being slidably matched, the portal frame, and the both ends of each guide rail are equipped with Mounting base is equipped with the connecting shaft being rotatablely connected with it in each mounting base, is arranged in each connecting shaft same Step is taken turns, and is connected between two synchronizing wheels by synchronous belt drive, the side wall of the sliding shoe is equipped with and synchronous belt The band movable plate being fixedly connected.

Further, it is described move material component further include there are two being located at stepper motor below two guide rails, it is described It is arranged with the first belt pulley on the output end of stepper motor, the second belt pulley is arranged in one of them described connecting shaft, it is described It is sequentially connected between first belt pulley and the second belt pulley by belt.

Further, the pressure assembly includes that there are two the press member being symmetrical set, each press members It include cradle, the cradle is equipped with the rotary shaft being rotatablely connected with it, it is arranged with position-limiting drum in the rotary shaft, The bottom of the cradle is equipped in the rack gear being vertically arranged, and the bottom of the workbench is equipped with mounting plate, the mounting plate Side wall is equipped with driving motor, and the output end of the driving motor is equipped with the driving gear being engaged with rack, the workbench It is equipped with the through slot passed through for cradle.

Further, the bottom of the workbench is set there are two the slide bar being vertically arranged, and the two sides of the rack gear are equipped with One slider guide, each slider guide correspond to a slide bar, and what the slider guide can slide is set in corresponding On slide bar.

Further, the winding component includes there are two symmetrically arranged winding part, and each winding part is equal It include installation riser, the side wall of the installation riser is equipped in wind-up roll that is horizontally disposed and being rotatablely connected with it, institute The end sleeve for stating wind-up roll is equipped with the stop collar that can be dismantled, and the side wall of the installation riser is equipped with support bracket, the support The top of frame is equipped with winding motor, is arranged with drive pulley, the end of the wind-up roll on the output end of the winding motor It is arranged with driven pulley, is sequentially connected between the drive pulley and driven pulley by belt.

Further, the component that unreels includes fixed frame, and the fixed frame is equipped with and unreels with what it was rotatablely connected Roller, the let off roll is in horizontally disposed.

Compared with prior art, the utility model has the beneficial effects that:

It is moved horizontally first, the utility model is able to drive tuning drive gear by screw rod slide unit with cutting part, because of scale Pointer is directed toward on graduated scale, and pressure assembly can carry out pressure operation to two parts of silk screens after cutting automatically, and worker passes through sight Silk screen width after examining the cutting that graduated scale enables worker precisely to calculate in advance, pressure assembly are used for automatically in winding Silk screen carries out pressure operation, to solve in the prior art not being cut into silk screen the silk screen of two parts of specified sizes and be difficult to certainly Dynamic the technical issues of pressing to silk screen.

Second, the utility model can carry out pressure operation to two parts of silk screens after cutting automatically by pressure assembly, keep away Exempt from silk screen and generate offset in cutting, pushing operation is carried out to silk screen manually without worker, it is thus also avoided that worker is because manually It presses and brings biggish security risk to it.

Third, the utility model can make portal frame transverse shifting by moving material component, enable round cutter in transverse direction Cutting operation is carried out to silk screen, improves the cutting efficiency to silk screen.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the schematic perspective view of the utility model；

Fig. 2 is the schematic top plan view of the utility model；

Fig. 3 is the partial elevational schematic diagram of cutting assembly；

Fig. 4 is the partial schematic sectional view of the utility model；

Fig. 5 is enlarged drawing at A in Fig. 4；

Appended drawing reference:

Workbench 1, winding component 2, winding part 2a, installation riser 2b, stop collar 2c, wind-up roll 2d, winding motor 2e, Driven pulley 2f, drive pulley 2g, cutting assembly 3, portal frame 3a, graduated scale 3b, screw rod slide unit 3c, tuning drive gear 3d, L Type clamping plate 3e, pressure assembly 4, press member 4a, rotary shaft 4b, position-limiting drum 4b1, cradle 4c, rack gear 4d, mounting plate 4e, Driving motor 4f, driving gear 4g, slide bar 4h, slider guide 4i unreel component 5, fixed frame 5a, let off roll 5b, cutting part 6, First vertical plate 6a, installation axle 6b, round cutter 6c, the second vertical plate 6d, rotary electric machine 6e, first gear 6f, second gear 6g are moved Expect component 7, guide rail 7a, sliding shoe 7b, mounting base 7c, connecting shaft 7d, synchronizing wheel 7e, synchronous belt 7f, band movable plate 7g, stepping electricity Machine 7h, the first belt pulley 7i, the second belt pulley 7j.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.

The component of the utility model embodiment for usually describing and showing in attached drawing here can be with a variety of different Configuration is to arrange and design.It therefore, is not below purport to the detailed description of the embodiments of the present invention provided in the accompanying drawings In the range of limitation claimed invention, but it is merely representative of the selected embodiment of the utility model.

Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Below with reference to shown in Fig. 1 to Fig. 5, it includes work that the utility model embodiment, which provides a kind of silk screen cutting machine, The top of workbench 1, the pressure is arranged in platform 1, winding component 2, cutting assembly 3 and pressure assembly 4, the cutting assembly 3 Component 4 and winding component 2 are arranged at the side of workbench 1, and the other side of the workbench 1, which is equipped with, unreels component 5, described to cut Cutting component 3 includes portal frame 3a, cutting part 6, graduated scale 3b, screw rod slide unit 3c and for driving cutting part 6 in transverse direction The slider bottom of screw rod slide unit 3c is arranged in mobile shifting material component 7, the cutting part 6, and the screw rod slide unit 3c setting exists On the side wall of portal frame 3a, set on the side wall of the portal frame 3a there are two spaced L-type clamping plate 3e, the graduated scale 3b is horizontally arranged on two L-type clamping plate 3e, and the slider top of the screw rod slide unit 3c is equipped with tuning drive gear 3d；Two L-types For clamping plate 3e for installing to graduated scale 3b, screw rod slide unit 3c is able to drive tuning drive gear 3d and the horizontal shifting of cutting part 6 Dynamic, because tuning drive gear 3d is directed toward on graduated scale 3b, worker enables what worker precisely calculated to cut by observation graduated scale 3b Silk screen width after cutting can carry out pressure operation to the silk screen in winding automatically by pressure assembly 4, silk screen is avoided to cut Middle generation offset, carries out pushing operation to silk screen manually without worker, it is thus also avoided that worker gives its band because of manual pressure Biggish security risk is carried out, portal frame 3a transverse shifting can have been made by moving material component 7, more convenient makes round cutter 6c Cutting operation is carried out to silk screen.

Specifically, the cutting part 6 includes the first vertical plate 6a for being arranged at intervals on the slider bottom of screw rod slide unit 3c The installation axle in being horizontally disposed with and with the first vertical plate 6a rotation connection is equipped with the second vertical plate 6d, the first vertical plate 6a The end sleeve of 6b, the installation axle 6b are equipped with round cutter 6c, rotary electric machine 6e on the side wall of the second vertical plate 6d, and described turn It is arranged with first gear 6f on the output end of dynamic motor 6e, is arranged with second engaged with first gear 6f on the installation axle 6b Gear 6g；Rotary electric machine 6e work can drive first gear 6f to rotate, and first gear 6f is able to drive second engaged Gear 6g rotation, second gear 6g are able to drive installation axle 6b rotation, round cutter 6c are enable to cut silk screen.

Specifically, being equipped on shifting material component 7 spaced guide rail 7a including there are two, each guide rail 7a The top of two sliding shoe 7b is arranged in the sliding shoe 7b, the portal frame 3a being slidably matched with it, each guide rail 7a's Both ends are equipped with mounting base 7c, and the connecting shaft 7d being rotatablely connected with it, each company are equipped on each mounting base 7c It is arranged with synchronizing wheel 7e on spindle 7d, is sequentially connected between two synchronizing wheel 7e by synchronous belt 7f, the sliding The side wall of block 7b is equipped with the band movable plate 7g being fixedly connected with synchronous belt 7f；Connecting shaft 7d drives synchronizing wheel 7e to rotate, Synchronous belt 7f is set to rotate, synchronous belt 7f, which passes through band movable plate 7g, can be such that sliding shoe 7b moves in a lateral direction Dynamic, sliding shoe 7b is able to drive portal frame 3a movement, and round cutter 6c is enable to carry out cutting operation to silk screen in transverse direction, improves To the cutting efficiency of silk screen.

Specifically, the material component 7 that moves further includes that there are two the stepper motor 7h being located at below two guide rail 7a, institutes It states and is arranged with the first belt pulley 7i on the output end of stepper motor 7h, be arranged with the second belt on one of them described connecting shaft 7d 7j is taken turns, is sequentially connected between the first belt pulley 7i and the second belt pulley 7j by belt；Stepper motor 7h work can drive Dynamic first belt pulley 7i rotation, the first belt pulley 7i are able to drive the second belt pulley 7j by belt and rotate, and send out connecting shaft 7d Raw rotation.

Specifically, the pressure assembly 4 includes that there are two the press member 4a being symmetrical set, each press members 4a includes cradle 4c, and the cradle 4c, which is equipped on the rotary shaft 4b, the rotary shaft 4b being rotatablely connected with it, to be covered Equipped with position-limiting drum 4b1, the bottom of the cradle 4c is equipped in the rack gear 4d being vertically arranged, and the bottom of the workbench 1 is equipped with The side wall of mounting plate 4e, the mounting plate 4e are equipped with driving motor 4f, and the output end of the driving motor 4f is equipped with and tooth The driving gear 4g of 4d engagement, the workbench 1 are equipped with the through slot passed through for cradle 4c；It can by pressure assembly 4 Automatically pressure operation is carried out to two parts of silk screens after cutting, driving motor 4f work can drive driving gear 4g to rotate, actively Gear 4g is able to drive the rack gear 4d movement engaged, moves rack gear 4d along the length direction of slide bar 4h, enables rack gear 4d It enough drives cradle 4c mobile, so that position-limiting drum 4b1 is precisely moved in the vertical direction, position-limiting drum 4b1 can be certain Height carries out pressure operation to the silk screen in winding, and silk screen is avoided to generate offset in cutting, without worker manually to silk screen Pushing operation is carried out, worker is avoided because of manual pressure and brings biggish security risk to it.

Specifically, the bottom of the workbench 1 is set there are two the slide bar 4h being vertically arranged, the two sides of the rack gear 4d are all provided with There are slider guide a 4i, each slider guide 4i to correspond to a slide bar 4h, what the slider guide 4i can be slided is set in On corresponding slide bar 4h；Move rack gear 4d along the length direction of slide bar 4h, slide bar 4h is for leading slider guide 4i To effect, rack gear 4d is enable to be moved in the vertical direction.

Specifically, the winding component 2 includes that there are two symmetrically arranged winding part 2a, each winding part 2a It include installation riser 2b, the side wall of the installation riser 2b is equipped in winding that is horizontally disposed and being rotatablely connected with it The side wall that the end sleeve of roller 2d, the wind-up roll 2d are equipped with the stop collar 2c, the installation riser 2b that can dismantle, which is equipped with, to be held Bracket, the top of the support bracket are equipped with winding motor 2e, are arranged with drive pulley on the output end of the winding motor 2e The end sleeve of 2g, the wind-up roll 2d are equipped with driven pulley 2f, lead between the drive pulley 2g and driven pulley 2f Cross belt transmission connection；Silk screen is first cut into the silk screen of two parts of specified sizes, two parts of silk screens are respectively wound on two wind-up rolls On 2d, two winding motor 2e synchronous workings, winding motor 2e can drive drive pulley 2g to rotate, and drive pulley 2g is logical It crosses belt and is able to drive driven pulley 2f rotation, so that wind-up roll 2d is rotated around the axis of its own, enable wind-up roll 2d Enough to carry out winding operation to the silk screen after cutting automatically, stop collar 2c is used to limit the silk screen being wound on wind-up roll 2d, Keep its winding neat.

Specifically, the component 5 that unreels includes fixed frame 5a, the fixed frame 5a is equipped with and puts with what it was rotatablely connected Winding up roller 5b, the let off roll 5b are in horizontally disposed；Let off roll 5b is for installing silk screen to be cut.

Working principle of the utility model is: worker by silk screen on let off roll 5b, worker start screw rod slide unit 3c work, screw rod slide unit 3c are able to drive tuning drive gear 3d and move horizontally with cutting part 6, because tuning drive gear 3d is directed toward graduated scale On 3b, worker passes through the silk screen width after observing the cutting that graduated scale 3b enables worker precisely to calculate, rotary electric machine 6e Work can drive first gear 6f to rotate, and first gear 6f is able to drive the second gear 6g rotation engaged, the second tooth Wheel 6g is able to drive installation axle 6b rotation, and round cutter 6c is enable to cut silk screen, and silk screen is first cut into two parts and is specified The silk screen of size, two parts of silk screens are respectively on two wind-up roll 2d, and two winding motor 2e work asynchronously, winding motor 2e Drive pulley 2g can be driven to rotate, drive pulley 2g is able to drive driven pulley 2f by belt and rotates, and makes to wind Roller 2d can be rotated around the axis of its own, so that wind-up roll 2d is carried out winding operation to the silk screen after cutting automatically, passed through Pressure assembly 4 can carry out pressure operation to two parts of silk screens after cutting automatically, and driving motor 4f work can drive driving tooth 4g rotation is taken turns, driving gear 4g is able to drive the rack gear 4d movement engaged, moves rack gear 4d along the length direction of slide bar 4h It is dynamic, so that rack gear 4d is able to drive cradle 4c movement, so that position-limiting drum 4b1 is precisely moved in the vertical direction, position-limiting drum 4b1 Pressure operation can be carried out to the silk screen in winding in certain height, silk screen is avoided to generate offset in cutting, be not necessarily to work Person carries out pushing operation to silk screen manually, avoids worker and brings biggish security risk to it due to manual pressure, leads to Portal frame 3a transverse shifting can be made by crossing shifting material component 7, and more convenient makes round cutter 6c carry out cutting operation, work to silk screen It is that stepper motor 7h work can drive the first belt pulley 7i to rotate as principle, the first belt pulley 7i is able to drive the by belt Two belt pulley 7j rotation, makes connecting shaft 7d rotate, and connecting shaft 7d drives synchronizing wheel 7e to rotate, and enables synchronous belt 7f It enough rotates, synchronous belt 7f, which passes through band movable plate 7g, can be such that sliding shoe 7b moves in a lateral direction, and sliding shoe 7b can It drives portal frame 3a mobile, so that round cutter 6c is carried out cutting operation to silk screen in transverse direction, improve the cutting to silk screen Efficiency.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (8)

1. a kind of silk screen cutting machine, which is characterized in that include workbench (1), winding component (2), cutting assembly (3) and pressure Component (4), cutting assembly (3) setting are all provided in the top of workbench (1), the pressure assembly (4) and winding component (2) The side in workbench (1) is set, the other side of the workbench (1), which is equipped with, to be unreeled component (5), and the cutting assembly (3) includes There are portal frame (3a), cutting part (6), graduated scale (3b), screw rod slide unit (3c) and for driving cutting part (6) in lateral shifting Dynamic shifting material component (7), slider bottom of cutting part (6) setting in screw rod slide unit (3c), the screw rod slide unit (3c) It is arranged on the side wall of portal frame (3a), is set on the side wall of the portal frame (3a) there are two spaced L-type clamping plate (3e), the graduated scale (3b) are horizontally arranged on two L-type clamping plates (3e), and the slider top of the screw rod slide unit (3c) is set There is tuning drive gear (3d).

2. silk screen cutting machine according to claim 1, which is characterized in that the cutting part (6) includes interval setting In the first vertical plate (6a) and the second vertical plate (6d) of the slider bottom of screw rod slide unit (3c), first vertical plate (6a), which is equipped with, is in Installation axle (6b) horizontally disposed and with the first vertical plate (6a) rotation connection, the end sleeve of the installation axle (6b) are equipped with circle Cutter (6c), rotary electric machine (6e) on the side wall of second vertical plate (6d) are arranged on the output end of the rotary electric machine (6e) Have first gear (6f), the second gear (6g) engaged with first gear (6f) is arranged on the installation axle (6b).

3. silk screen cutting machine according to claim 1, which is characterized in that shifting material component (7) includes that there are two intervals The guide rail (7a) of setting is equipped with the sliding shoe (7b) being slidably matched with it, the portal frame on each guide rail (7a) (3a) is arranged at the top of two sliding shoes (7b), and the both ends of each guide rail (7a) are equipped with mounting base (7c), Mei Gesuo The connecting shaft (7d) for being equipped on mounting base (7c) and being rotatablely connected with it is stated, is arranged with synchronization on each connecting shaft (7d) It takes turns (7e), is sequentially connected between two synchronizing wheels (7e) by synchronous belt (7f), on the side wall of the sliding shoe (7b) Equipped with band movable plate (7g) being fixedly connected with synchronous belt (7f).

4. silk screen cutting machine according to claim 3, which is characterized in that shifting material component (7) further includes that there are two divide Not Wei Yu stepper motor (7h) below two guide rails (7a), be arranged with the first belt on the output end of the stepper motor (7h) It takes turns (7i), is arranged with the second belt pulley (7j) on one of them described connecting shaft (7d), first belt pulley (7i) and second It is sequentially connected between belt pulley (7j) by belt.

5. silk screen cutting machine according to claim 1, which is characterized in that the pressure assembly (4) includes that there are two be in pair Claim the press member (4a) of setting, each press member (4a) includes cradle (4c), on the cradle (4c) It equipped with the rotary shaft (4b) being rotatablely connected with it, is arranged with position-limiting drum (4b1) on the rotary shaft (4b), the cradle (4c) Bottom be equipped in the rack gear (4d) that is vertically arranged, the bottom of the workbench (1) is equipped with mounting plate (4e), the mounting plate The side wall of (4e) is equipped with driving motor (4f), and the output end of the driving motor (4f) is equipped with the master engaged with rack gear (4d) Moving gear (4g), the workbench (1) are equipped with the through slot passed through for cradle (4c).

6. silk screen cutting machine according to claim 5, which is characterized in that the bottom of the workbench (1) sets that there are two perpendicular The slide bar (4h) being directly arranged, the two sides of the rack gear (4d) are equipped with a slider guide (4i), and each slider guide (4i) is equal A corresponding slide bar (4h), what the slider guide (4i) can be slided is set on corresponding slide bar (4h).

7. silk screen cutting machine according to claim 1, which is characterized in that the winding component (2) includes that there are two symmetrical The winding part (2a) of setting, each winding part (2a) includes installation riser (2b), the installation riser (2b) Side wall be equipped in wind-up roll (2d) that is horizontally disposed and being rotatablely connected with it, the end sleeve of the wind-up roll (2d) is equipped with The side wall of the stop collar (2c) that can be dismantled, the installation riser (2b) is equipped with support bracket, and the top of the support bracket is equipped with Winding motor (2e) is arranged with drive pulley (2g) on the output end of the winding motor (2e), the wind-up roll (2d) End sleeve is equipped with driven pulley (2f), is driven and is connected by belt between the drive pulley (2g) and driven pulley (2f) It connects.

8. silk screen cutting machine according to claim 1, which is characterized in that the component (5) that unreels includes fixed frame (5a), the fixed frame (5a) are equipped with the let off roll (5b) being rotatablely connected with it, and the let off roll (5b) is in horizontally disposed.