CN212831940U

CN212831940U - A multi-functional cloth inspection machine for detecting fine fabric defect of glass

Info

Publication number: CN212831940U
Application number: CN202020945771.9U
Authority: CN
Inventors: 单小武; 曹爱军
Original assignee: Changzhou Pro Tech Industry Co ltd
Current assignee: Changzhou Pro Tech Industry Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-30
Anticipated expiration: 2030-05-29

Abstract

The utility model discloses a multifunctional cloth inspecting machine for detecting defects of glass fiber fabrics, which comprises a cloth inspecting machine body, and an unreeling mechanism, a cloth inspecting mechanism, a slitting mechanism and a reeling mechanism which are sequentially arranged on the cloth inspecting machine body; the splitting mechanism comprises a tension arm and a driving module; a cutter shaft and a cutter seat shaft with adjustable intervals are arranged on the tension arm in a parallel rotating manner; the cutter shaft and the cutter seat shaft are driven to rotate by a driving module; a plurality of blades are arranged on the cutter shaft; and the cutter holder shaft is provided with a cutter holder matched with the blade. The utility model discloses to perch, cut, the rolling is gathered as an organic wholely, and arbor and blade holder interaxial distance are adjustable simultaneously, can open in a flexible way and close the function of cutting through adjusting arbor and blade holder interaxial distance, and convenient to use is applicable to the rewinding of the big package product of glass fiber fabric, cuts, the requirement of inspection very much.

Description

A multi-functional cloth inspection machine for detecting fine fabric defect of glass

Technical Field

The utility model relates to a textile sector especially relates to a multi-functional cloth inspection machine for detecting fine fabric defect of glass.

Background

Glass fiber belongs to the composite material field, and the fabric produced by glass fiber is also widely used in the fields of pipeline reinforcement, wind power blade manufacture, shipbuilding, circuit board base material and the like, and the glass fiber fabric is usually: woven scrim, stitch-bonded chopped strand mats, powder chopped strand mats, scrim composite mats, 0 °/90 ° stitch-bonded mats, sandwich mats, multi-axial products, and the like. At present, the glass fiber fabrics are wound on a paper tube after being produced, the package quantity is gradually transited to a large package so as to reduce the joint waste in use, the fabric appearance defects are generally detected on line, if quality rechecking is required, the package forming problem after cloth inspection cannot be guaranteed by a currently marketed cloth inspection machine, and meanwhile, when the large package glass fiber fabrics are produced, if the deformation problems of core pulling and the like of product packages can be caused by external reasons such as equipment faults, process fluctuation and the like, the package deformation products need to be arranged on a rewinding machine for rewinding. In addition, products which cannot be cut on line are cut on a rear cutting device, the cut products are wound into large packages, the difficulty is very high, if the large packages deform during production, the finished products are rewound, cut and inspected, the existing equipment cannot be used for both rewinding and cutting, machines are required to be converted for multiple times, the operation is complex, time and labor are wasted, the working efficiency is low, and meanwhile the forming quality of the large packages cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multi-functional cloth inspection machine for detecting fine fabric defect of glass.

Realize the utility model discloses the technical scheme of purpose is: a multifunctional cloth inspecting machine for detecting defects of glass fiber fabrics comprises a cloth inspecting machine body, and an unwinding mechanism, a cloth inspecting mechanism, a splitting mechanism and a winding mechanism which are sequentially arranged on the cloth inspecting machine body; the splitting mechanism comprises a tension arm and a driving module; a cutter shaft and a cutter seat shaft with adjustable intervals are arranged on the tension arm in a parallel rotating manner; the cutter shaft and the cutter seat shaft are driven to rotate by a driving module; a plurality of blades are arranged on the cutter shaft; and the cutter holder shaft is provided with a cutter holder matched with the blade.

Two telescopic cylinders are arranged in the tension arm; the telescopic ends of the two telescopic cylinders are respectively sleeved at the positions, close to the two ends, of the cutter shaft; one end of the cutter shaft extends out of the tension arm and is concentrically provided with a driven wheel; and the tool apron shaft is provided with a driving wheel matched with the driven wheel.

The slitting mechanism further comprises a tension cylinder; one end of the tension cylinder is fixed on the cloth inspecting machine body, and the other end of the tension cylinder is fixed in the middle of the tension arm; one end of the tension arm is rotationally fixed on the cloth inspecting machine body.

The slitting mechanism further comprises a first guide shaft, a second guide shaft and a roller, wherein the first guide shaft and the second guide shaft are arranged in front of the cutter shaft and the cutter holder shaft, and the roller is arranged behind the cutter shaft and the cutter holder shaft; cloth bypasses the first guide shaft and the second guide shaft in sequence, and bypasses the roller to enter the winding mechanism after being cut by the cutter shaft and the cutter holder shaft.

The cloth inspecting mechanism comprises a lower guide roller, a middle guide roller and an upper guide roller, and a light-transmitting plate arranged on the front side of the cloth inspecting mechanism and a light source in the cloth inspecting mechanism; the lower guide roller is arranged at the inlet of the cloth inspecting mechanism; the middle guide roller and the upper guide roller are respectively arranged at two ends of the light-transmitting plate.

The unwinding mechanism comprises an unwinding frame and an unwinding support arm arranged on the unwinding frame; the unwinding support arm is sequentially provided with a magnetic powder brake, a first unwinding guide roller and a second unwinding guide roller; the upper end of the unwinding supporting arm is provided with an unwinding shaft suitable for sleeving the cloth barrel; the unreeling shaft is in transmission connection with the magnetic powder brake.

One end of the unwinding support arm is rotatably arranged on the unwinding frame; the middle part of the unwinding support arm is provided with an unwinding cylinder suitable for adjusting the angle of the unwinding support arm; the telescopic end of the unreeling cylinder is rotationally fixed on the unreeling frame.

A rack guide rail is arranged below the unreeling rack; the bottom of the unreeling frame is provided with a guide groove matched with the rack guide rail; and the unwinding frame is provided with a deviation rectifying motor suitable for adjusting the position of the unwinding frame.

A pedal is arranged between the unwinding mechanism and the cloth inspecting mechanism; the pedal is provided with a deviation rectifier; and the deviation rectifier is electrically connected with the deviation rectifying motor.

The winding mechanism comprises a winding support arm and a winding cylinder; one end of the winding support arm is rotatably arranged on the cloth inspecting machine body, and the other end of the winding support arm is provided with a winding shaft; the winding cylinder is fixed on the cloth inspecting machine body, and the telescopic end is rotatably connected with the middle part of the winding support arm.

The driving module comprises a driving motor; the driving motor is in transmission connection with one of the cutter holder shaft and the roller; preferably in driving connection with the rolls.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

(1) the utility model discloses to perch, cut, the rolling is gathered as an organic wholely, and arbor and blade holder interaxial distance are adjustable simultaneously, can open in a flexible way and close the function of cutting through adjusting arbor and blade holder interaxial distance, and convenient to use is applicable to the rewinding of the big package product of glass fiber fabric, cuts, the requirement of inspection very much.

(2) The utility model discloses a being close to and keeping away from of telescopic cylinder control arbor and blade holder axle, when cloth is cut to needs, the cylinder stretches out, makes arbor and blade holder axle press close to, the arbor from the action wheel meshing of driving wheel and blade holder axle, and the arbor drives the blade and rotates, cuts cloth, when cloth need not be cut, shrink telescopic cylinder makes arbor and blade holder axle keep away from, then arbor and blade holder axle gear separation, and the arbor stall closes promptly and cuts the function, and it is very convenient to use.

(3) The utility model discloses tension arm one end is rotated and is fixed on the cloth inspection machine body, can conveniently control the angle of tension arm through control tension cylinder to control cloth tension makes things convenient for the rolling.

(4) The utility model discloses a cloth is around first guiding axle and second guiding axle in proper order, is cut by arbor and blade holder axle and is walked around the roll and get into winding mechanism after cutting, stretches out and arranges cloth through first guide roll and second guide roll, conveniently cuts, pulls the cloth after cutting through the roll simultaneously, prevents the confusion.

(5) The utility model discloses a well deflector roll sets up respectively at the light-passing board both ends with last deflector roll, and through well deflector roll and the flat cloth of last deflector roll exhibition, the light-passing board makes the light that the light source sent more even, changes the discovery from the defect of the cloth of light-passing board top process, can pass through artifical naked eye perching, also accessible install the perching camera and carry out perching, and is very convenient.

(6) The utility model discloses a magnetic powder brake, the first deflector roll that unreels and the second that unreels in the arm brace unreels the deflector roll, can with the yardage roll on because of not rolling up or transporting and lead to the partial exhibition flat of folding, convenient cloth inspection, magnetic powder brake adjusts in a flexible way simultaneously and unreels tension.

(7) The utility model discloses an unreel the arm brace middle part and be equipped with and be suitable for the cylinder that unreels that adjusts to unreel the arm brace angle, unreel the cylinder through adjusting, adjust the angle that unreels the arm brace to control tension.

(8) The utility model discloses a be equipped with the motor of rectifying that is suitable for to adjust unreel frame position on the frame of unreeling, can control the horizontal position of unreeling the frame through the motor to adjust the strap position.

(9) The utility model discloses a be equipped with the footboard between unwinding mechanism and cloth inspecting mechanism, be equipped with the ware of rectifying on the footboard, the ware of rectifying is connected with the motor electricity of rectifying, rectifies through the ware of rectifying, and is more accurate and high-efficient, uses manpower sparingly.

(10) The utility model discloses a can adjust rolling tension through the rolling cylinder on the rolling brace arm, slack fold when avoiding the strap rolling.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the structural schematic diagram of the slitting mechanism of the present invention.

The reference numbers in the drawings are as follows: the unwinding device comprises an unwinding mechanism 1, an unwinding frame 1-1, unwinding support arms 1-2, a magnetic powder brake 1-3, a first unwinding guide roller 1-4, a second unwinding guide roller 1-5, an unwinding cylinder 1-6, a rack guide rail 1-7 and guide grooves 1-8;

the cloth inspecting mechanism comprises a cloth inspecting mechanism 2, a lower guide roller 2-1, a middle guide roller 2-2, an upper guide roller 2-3, a light-transmitting plate 2-4 and a light source 2-5;

the cutting mechanism 3, the tension arm 3-1, the cutter shaft 3-2, the blade 3-2-1, the cutter holder shaft 3-3, the cutter holder 3-3-1, the telescopic cylinder 3-4, the driven wheel 3-5, the driving wheel 3-6, the tension cylinder 3-7, the first guide shaft 3-8, the second guide shaft 3-9 and the roller 3-10;

the winding mechanism 4, a winding support arm 4-1 and a winding cylinder 4-2;

a pedal 5.

Detailed Description

(example 1)

Referring to fig. 1 and 2, the multifunctional cloth inspecting machine for detecting defects of glass fiber fabrics in the embodiment includes a cloth inspecting machine body, and an unwinding mechanism 1, a cloth inspecting mechanism 2, a slitting mechanism 3 and a winding mechanism 4 sequentially arranged on the cloth inspecting machine body; the splitting mechanism 3 comprises a tension arm 3-1 and a driving module; the tension arm 3-1 is provided with a cutter shaft 3-2 and a cutter seat shaft 3-3 with adjustable intervals in parallel in a rotating way; the cutter shaft 3-2 and the cutter holder shaft 3-3 are driven to rotate by the driving module; the cutter shaft 3-2 is provided with a plurality of blades 3-2-1; the cutter holder shaft 3-3 is provided with a cutter holder 3-3-1 matched with the blade 3-2-1.

The blades 3-2-1 are preferably circular and are concentrically arranged on the cutter shaft 3-2, and the distance between every two adjacent blades 3-2-1 is adjusted according to cloth cutting parameters.

In order to conveniently control the splitting mechanism 3, two telescopic cylinders 3-4 are arranged in the tension arm 3-1; the telescopic ends of the two telescopic cylinders 3-4 are respectively sleeved at the two ends of the cutter shaft 3-2 close to the two ends; one end of the cutter shaft 3-2 extends out of the tension arm 3-1, and is concentrically provided with a driven wheel 3-5; the cutter holder shaft 3-3 is provided with a driving wheel 3-6 matched with a driven wheel 3-5, the telescopic cylinder 3-4 is used for controlling the cutter shaft 3-2 and the cutter holder shaft 3-3 to be close to and far away from each other, when cloth needs to be cut, the cylinder extends out to enable the cutter shaft 3-2 and the cutter holder shaft 3-3 to be close to each other, the driven wheel 3-5 of the cutter shaft 3-2 is meshed with the driving wheel 3-6 of the cutter holder shaft 3-3 to cut the cloth, when the cloth does not need to be cut, the telescopic cylinder 3-4 is contracted to enable the driven wheel 3-5 of the cutter shaft 3-2 and the driving wheel 3-6 of the cutter holder shaft 3-3 to be separated, namely, the cutting function is closed.

In order to conveniently control the tension arm 3-1, the slitting mechanism 3 also comprises a tension cylinder 3-7; one end of a tension cylinder 3-7 is fixed on the cloth inspecting machine body, and the other end is fixed in the middle of a tension arm 3-1; one end of the tension arm 3-1 is rotationally fixed on the cloth inspecting machine body, and the angle of the tension arm 3-1 can be conveniently controlled by controlling the tension cylinder 3-7, so that the cloth tension is controlled, and the cloth is conveniently rolled.

In order to facilitate slitting, the slitting mechanism 3 further comprises a first guide shaft 3-8 and a second guide shaft 3-9 which are arranged in front of the cutter shaft 3-2 and the cutter holder shaft 3-3, and a roller 3-10 which is arranged behind the cutter shaft 3-2 and the cutter holder shaft 3-3; cloth orderly rounds a first guide shaft 3-8 and a second guide shaft 3-9, after being cut by a cutter shaft 3-2 and a cutter holder shaft 3-3, the cloth rounds a roller 3-10 to enter a winding mechanism 4, the cloth is stretched and arranged by the first guide roller and the second guide roller, cutting is convenient, and meanwhile, the cut cloth is pulled by the roller 3-10 to prevent disorder. The roller 3-10 and the tool apron shaft 3-3 rotate synchronously through a belt pulley arranged on the same side.

In order to facilitate cloth inspection, the cloth inspection mechanism 2 comprises a lower guide roller 2-1, a middle guide roller 2-2, an upper guide roller 2-3, a light transmission plate 2-4 arranged on the front side of the cloth inspection mechanism 2 and a light source 2-5 arranged in the cloth inspection mechanism 2; the lower guide roller 2-1 is arranged at the inlet of the cloth inspecting mechanism 2; the middle guide roller 2-2 and the upper guide roller 2-3 are respectively arranged at two ends of the light-transmitting plate 2-4, the cloth is flattened through the middle guide roller 2-2 and the upper guide roller 2-3, light emitted by the light source 2-5 is more uniform through the light-transmitting plate 2-4, the defect of the cloth passing through the upper portion of the light-transmitting plate 2-4 can be found more easily, cloth inspection can be performed through naked eyes, and cloth inspection can also be performed through installing a cloth inspection camera, so that the cloth inspection is very convenient.

In order to facilitate unreeling, the unreeling mechanism 1 comprises an unreeling frame 1-1 and an unreeling support arm 1-2 arranged on the unreeling frame 1-1; the unwinding support arm 1-2 is sequentially provided with a magnetic powder brake 1-3, a first unwinding guide roller 1-4 and a second unwinding guide roller 1-5; the upper end of the unwinding support arm 1-2 is provided with an unwinding shaft suitable for sleeving a cloth barrel; the unwinding shaft is in transmission connection with the magnetic powder brake 1-3, the folded part of the cloth roll, which is not rolled or is transported, can be flattened, cloth inspection is facilitated, and meanwhile the unwinding tension is flexibly adjusted by the magnetic powder brake 1-3.

In order to further conveniently adjust the tension of the cloth inspecting machine, one end of the unwinding support arm 1-2 is rotatably arranged on the unwinding frame 1-1; the middle part of the unwinding support arm 1-2 is provided with an unwinding cylinder 1-6 which is suitable for adjusting the angle of the unwinding support arm 1-2; the telescopic end of the unreeling cylinder 1-6 is rotatably fixed on the unreeling frame 1-1, and the angle of the unreeling support arm 1-2 is adjusted by adjusting the unreeling cylinder 1-6, so that the tension is controlled.

In order to correct the deviation of the cloth belt conveniently, a rack guide rail 1-7 is arranged below the unreeling rack 1-1; the bottom of the unreeling frame 1-1 is provided with a guide groove 1-8 matched with a rack guide rail 1-7; the unwinding frame 1-1 is provided with a deviation-rectifying motor suitable for adjusting the position of the unwinding frame 1-1, and the motor can control the horizontal position of the unwinding frame 1-1 so as to adjust the position of the cloth belt.

In order to further conveniently correct the deviation of the cloth belt, a pedal 5 is arranged between the unwinding mechanism 1 and the cloth inspecting mechanism 2; the pedal 5 is provided with a deviation rectifier; the deviation rectifier is electrically connected with the deviation rectifying motor, and the deviation is rectified through the deviation rectifier, so that the deviation rectifying device is more accurate and efficient, and labor is saved.

In order to facilitate rolling, the rolling mechanism 4 comprises a rolling supporting arm 4-1 and a rolling cylinder 4-2; one end of the rolling supporting arm 4-1 is rotatably arranged on the cloth inspecting machine body, and the other end is provided with a rolling shaft; the winding cylinder 4-2 is fixed on the cloth inspecting machine body, the telescopic end is rotatably connected with the middle part of the winding support arm 4-1, and the winding shaft is driven by the winding motor and can adjust winding tension through the winding cylinder 4-2, so that the phenomenon that the cloth belt is loosened and wrinkled during winding is avoided.

The driving module comprises a driving motor; the driving motor is in transmission connection with one of the tool apron shaft 3-3 and the roller 3-10; preferably in driving connection with the rolls 3-10. The cutter shaft 3-2, the tool apron shaft 3-3 and the roller 3-10 can be driven by only one driving motor, and the use is very convenient.

When the cloth inspecting device is used, cloth to be inspected is wound on the unwinding shaft at the upper end of the unwinding support arm 1-2, and a cloth belt sequentially bypasses the first unwinding guide roller 1-4 and the second unwinding guide roller 1-5 and enters the cloth inspecting mechanism 2. The cloth belt bypasses the lower guide roller 2-1 and the middle guide roller 2-2, is flattened above the light-transmitting plate 2-4 for cloth inspection, and then bypasses the upper guide roller 2-3 to enter the slitting mechanism 3. After entering the splitting mechanism 3, the cutting blade sequentially bypasses the first guide roller and the second guide roller, passes through the space between the cutter shaft 3-2 and the cutter holder shaft 3-3, bypasses the roller 3-10, enters the winding mechanism 4 and is wound on the winding shaft.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a multi-functional cloth inspection machine for detecting fine fabric defect of glass which characterized in that: comprises a cloth inspecting machine body, and an unreeling mechanism (1), a cloth inspecting mechanism (2), a splitting mechanism (3) and a reeling mechanism (4) which are sequentially arranged on the cloth inspecting machine body; the splitting mechanism (3) comprises a tension arm (3-1) and a driving module; the tension arm (3-1) is provided with a cutter shaft (3-2) and a cutter seat shaft (3-3) with adjustable intervals in parallel in a rotating way; the cutter shaft (3-2) and the cutter seat shaft (3-3) are driven to rotate by a driving module; a plurality of blades (3-2-1) are arranged on the cutter shaft (3-2); the cutter holder shaft (3-3) is provided with a cutter holder (3-3-1) matched with the blade (3-2-1).

2. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: two telescopic cylinders (3-4) are arranged in the tension arm (3-1); the telescopic ends of the two telescopic cylinders (3-4) are respectively sleeved at the positions, close to the two ends, of the cutter shaft (3-2); one end of the cutter shaft (3-2) extends out of the tension arm (3-1) and is concentrically provided with a driven wheel (3-5); the tool rest shaft (3-3) is provided with a driving wheel (3-6) matched with the driven wheel (3-5).

3. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: the splitting mechanism (3) also comprises a tension cylinder (3-7); one end of the tension cylinder (3-7) is fixed on the cloth inspecting machine body, and the other end of the tension cylinder is fixed in the middle of the tension arm (3-1); one end of the tension arm (3-1) is rotationally fixed on the cloth inspecting machine body.

4. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: the splitting mechanism (3) further comprises a first guide shaft (3-8) and a second guide shaft (3-9) which are arranged in front of the cutter shaft (3-2) and the cutter holder shaft (3-3), and a roller (3-10) which is arranged behind the cutter shaft (3-2) and the cutter holder shaft (3-3); the cloth sequentially bypasses the first guide shaft (3-8) and the second guide shaft (3-9), is cut by the cutter shaft (3-2) and the cutter seat shaft (3-3) and then bypasses the roller (3-10) to enter the winding mechanism (4).

5. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: the cloth inspecting mechanism (2) comprises a lower guide roller (2-1), a middle guide roller (2-2) and an upper guide roller (2-3), and a light transmitting plate (2-4) arranged on the front side of the cloth inspecting mechanism (2) and a light source (2-5) in the cloth inspecting mechanism (2); the lower guide roller (2-1) is arranged at the inlet of the cloth inspecting mechanism (2); the middle guide roller (2-2) and the upper guide roller (2-3) are respectively arranged at two ends of the light-transmitting plate (2-4).

6. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: the unwinding mechanism (1) comprises an unwinding frame (1-1) and an unwinding support arm (1-2) arranged on the unwinding frame (1-1); the unwinding support arm (1-2) is sequentially provided with a magnetic powder brake (1-3), a first unwinding guide roller (1-4) and a second unwinding guide roller (1-5); the upper end of the unwinding supporting arm (1-2) is provided with an unwinding shaft suitable for sleeving a cloth barrel; the unreeling shaft is in transmission connection with the magnetic powder brake (1-3).

7. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 6, is characterized in that: one end of the unreeling support arm (1-2) is rotatably arranged on the unreeling frame (1-1); the middle part of the unreeling support arm (1-2) is provided with an unreeling cylinder (1-6) suitable for adjusting the angle of the unreeling support arm (1-2); the telescopic end of the unreeling cylinder (1-6) is rotationally fixed on the unreeling frame (1-1).

8. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 6, is characterized in that: a rack guide rail (1-7) is arranged below the unreeling rack (1-1); the bottom of the unreeling frame (1-1) is provided with a guide groove (1-8) matched with the rack guide rail (1-7); and a deviation correcting motor suitable for adjusting the position of the unreeling frame (1-1) is arranged on the unreeling frame (1-1).

9. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 8, is characterized in that: a pedal (5) is arranged between the unreeling mechanism (1) and the cloth inspecting mechanism (2); the pedal (5) is provided with a deviation rectifier; and the deviation rectifier is electrically connected with the deviation rectifying motor.

10. The multifunctional cloth inspecting machine for detecting the defects of the glass fiber fabrics as claimed in claim 1, is characterized in that: the winding mechanism (4) comprises a winding support arm (4-1) and a winding cylinder (4-2); one end of the winding support arm (4-1) is rotatably arranged on the cloth inspecting machine body, and the other end of the winding support arm is provided with a winding shaft; the winding cylinder (4-2) is fixed on the cloth inspecting machine body, and the telescopic end is rotatably connected with the middle part of the winding support arm (4-1).