Paper guide device

Abstract

The utility model provides a paper guiding device which is arranged based on a wallboard of a paper guiding mechanism in a cigarette making machine and comprises a driving part and a paper guiding part, and the driving part is in transmission connection with the paper guiding part so that the paper guiding part can drive cigarette paper to move in the direction away from a gluing piece. The device can be additionally arranged in the cigarette making machine to adjust the distance between the cigarette paper and the gluing piece, so that an operator can maintain and clean the gluing piece under the condition that the cigarette paper is not damaged, the maintenance and cleaning efficiency is improved, and meanwhile, the consumption of raw and auxiliary materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette equipment, in particular to a paper guiding device. Background Art

[0002] Among the new tobacco products in the current cigarette industry, heated cigarettes have become one of the important development directions of new tobacco product technology due to their characteristics of heating without burning. Among them, the smoking section is the core part of heated cigarette products, which is made of atomized tobacco and aluminum foil. As the market sales of heated cigarettes increase year by year, the production equipment corresponding to the smoking section of heated cigarettes needs to speed up to meet the gradually expanding production demand. However, in the process of equipment speeding up, due to the high moisture content of atomized tobacco, it will shrink after heating, and the high barrier material properties of aluminum foil, resulting in a small relative friction between the two. When the equipment runs at high speed, the friction will be further reduced, resulting in the relative sliding and falling off of the tobacco ball and the aluminum foil when the cigarette cartridge is rotated and extracted, resulting in quality defects in the finished product. Therefore, it is necessary to increase the friction by gluing the metal surface of the aluminum foil.

[0003] In the actual production process, the new tobacco smoking section rolling equipment is the Changde ZJ118 cigarette making machine. In order to glue the metal surface of the aluminum foil, a gluing mechanism is installed inside the cigarette making machine, which makes the space between the structures in the cigarette making machine compact. There is not enough space to install a translation cylinder at the gluing part, which requires operators to tear off the aluminum foil strips to maintain and clean the gluing parts, increasing the frequency and downtime of the cigarette making machine, thereby affecting the working efficiency and cigarette making efficiency of the cigarette making machine, and increasing the consumption of raw and auxiliary materials. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a paper guide device which can be installed inside a cigarette making machine to adjust the distance between cigarette paper and a gluing member, so that an operator can directly maintain and clean the gluing member.

[0005] The utility model solves the problem by providing a paper guiding device, which is based on the wall panel arrangement of the paper guiding mechanism inside the cigarette making machine and comprises a driving part and a paper guiding part, wherein the driving part is transmission-connected with the paper guiding part, the running path of the paper guiding part is cross-arranged with the paper path of the cigarette paper, and the driving part drives the paper guiding part to drive the cigarette paper to move in a direction away from the gluing part.

[0006] Furthermore, a first paper guide roller and a second paper guide roller are provided on the wall panel, a paper guide device is provided between the first paper guide roller and the second paper guide roller, and the operating range of the paper guide part is smaller than the stretchable range of the cigarette paper between the first paper guide roller and the second paper guide roller.

[0007] Furthermore, the paper guide part includes a paper top part and a telescopic part, one end of the telescopic part is transmission-connected to the driving part, and the other end of the telescopic part is provided with a paper top part, which is arranged below the cigarette paper; the driving part drives the telescopic part to run in a direction away from the upper glue part, so that the paper top part lifts the cigarette paper in a direction away from the upper glue part.

[0008] Furthermore, a vertical telescopic member is provided for the paper top member.

[0009] Furthermore, it also includes a paper pressing piece. The two sides of the cigarette paper are respectively provided with a paper pressing piece and a paper top piece, and the paper pressing piece is arranged above the paper top piece.

[0010] Furthermore, the paper pressing member and the paper pushing member are arranged in parallel.

[0011] Furthermore, it also includes a fixing member, which is arranged at the end of the telescopic member, and the paper-pushing member and the paper-pressing member are both connected to the telescopic member through the fixing member.

[0012] Furthermore, the paper pushing member and the paper pressing member are both arranged in the middle of the fixing member.

[0013] Furthermore, the telescopic member telescopes in the vertical direction, so that the paper-top member can adjust the paper path of the cigarette paper in the vertical direction.

[0014] Furthermore, the plurality of parallel telescopic members are transmission-connected to the driving unit, and the driving unit drives the telescopic members to telescope synchronously and in the same direction.

[0015] The beneficial effect of the utility model is that the utility model is installed inside the cigarette making machine, and can increase the distance between the cigarette paper and the gluing part, so that the operator can maintain and clean the gluing part without damaging the cigarette paper, thereby improving the efficiency of maintenance and cleaning and reducing the consumption of raw and auxiliary materials.

[0016] The utility model can also clamp and limit the cigarette paper when the cigarette paper is running without changing the original running track of the cigarette paper, so that the cigarette paper is more stable during the running process and is not prone to deviation and shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural diagram of a paper guiding device and a paper guiding mechanism;

[0019] Figure 2 It is a front view of the paper guiding device and the paper guiding mechanism;

[0020] Figure 3 This is a structural diagram of the paper guiding device.

[0021] In the figure: 1. driving part; 2. paper guide part; 21. paper supporting part; 22. telescopic part; 23. paper pressing part; 24. fixing part; 241. first fixing plate; 242. second fixing plate; 3. mounting plate; 4. wall panel; 5. gluing part; 6. first paper guide roller; 7. second paper guide roller; 8. cigarette paper. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 In order to solve the above problems, the utility model proposes a paper guide device, which can be installed inside the cigarette making machine, and cooperates with the existing paper guide mechanism to make the cigarette paper 8 away from or close to the gluing member 5. When the gluing member 5 needs to be maintained or cleaned, the transportation of the cigarette paper 8 is stopped first, and then, within the allowable tension range of the cigarette paper 8, the paper guide device drives the cigarette paper 8 away from the gluing member 5, so that the operator can directly maintain and clean the gluing member 5 without tearing the cigarette paper 8; when the gluing member 5 does not need to be maintained or cleaned, the cigarette paper 8 operates normally, and the paper guide device limits the upper and lower sides of the cigarette paper 8 without affecting the original running path of the cigarette paper 8, so that the operation of the cigarette paper 8 is more stable, and the cigarette paper 8 is prevented from shaking, thereby stabilizing the relative position of the cigarette paper 8 and the gluing member 5 and stabilizing the stability of the gluing.

[0024] See also Figure 1-3 The paper guide device of the present application includes a driving part 1 and a paper guide part 2, and the driving part 1 and the paper guide part 2 are transmission-connected, so that the paper guide part 2 lifts the cigarette paper 8 in the direction away from the upper glue part 5. When the upper glue part 5 needs to be maintained or cleaned, the operation of the cigarette paper 8 is stopped, and the driving part 1 drives the paper guide part 2 to lift the cigarette paper 8; when the upper glue part 5 does not need to be maintained or cleaned or after the maintenance or cleaning of the upper glue part 5 is completed, the driving part 1 drives the paper guide part 2 to fit the surface of the cigarette paper 8, and the paper guide part 2 does not interfere with the operation of the cigarette paper 8. The specific installation positions of the paper guide device include:

[0025] As an implementation method, the paper guide device is arranged downstream of the gluing member 5, that is, between the gluing member 5 and the second paper guide roller 7. The size of the overall structure of the paper guide device is adapted to the space between the gluing member 5 and the second paper guide roller 7, ensuring that the paper guide device does not interfere with structures other than the wallboard 4 and the cigarette paper 8.

[0026] As a preferred embodiment, the paper guide device is arranged upstream of the gluing member 5, that is, between the gluing member 5 and the first paper guide roller 6. There is ample space between the gluing member 5 and the centering assembly. In order to achieve the effects of better keeping away from the gluing member 5 and stabilizing the position of the gluing section of the cigarette paper 8 when the paper guide 2 guides the cigarette paper 8 to run, the overall structure of the paper guide device is arranged close to the gluing member 5, and the paper guide device does not interfere with the structures other than the wallboard 4 and the cigarette paper 8.

[0027] It should be noted that a cigarette making machine with a built-in gluing mechanism generally includes a paper guiding mechanism, a gluing mechanism and other structures. The paper guiding mechanism generally includes a wall panel 4, a first paper guiding roller 6, a second paper guiding roller 7 and other structures. The gluing mechanism generally includes a gluing part 5, a centering component and other mechanisms.

[0028] See also Figure 2 and Figure 3 In a specific embodiment of the present application, the paper guide 2 includes a top paper member 21 and a telescopic member 22, one end of the telescopic member 22 is transmission-connected to the driving unit 1, and the other end of the telescopic member 22 is provided with a top paper member 21, and the top paper member 21 is arranged below the cigarette paper 8; the driving unit 1 drives the telescopic member 22 to move in a direction away from the upper glue member 5, so that the top paper member 21 drives the cigarette paper 8 to move in a direction away from the upper glue member 5. The operating range of the paper guide 2 can be adaptively adjusted according to actual conditions, ensuring that the operating range of the paper guide 2 is smaller than the stretchable range of the cigarette paper 8 between the first paper guide roller 6 and the second paper guide roller 7. The operating direction of the top paper member 21 specifically includes:

[0029] As an implementation method, the telescopic member 22 drives the top paper member 21 to move in an oblique upward direction, for example, to move obliquely to the upper left of the cigarette paper 8. When the cigarette paper 8 is running or stopped, it will be subjected to vertical and horizontal forces given by the top paper member 21.

[0030] As a preferred embodiment, the telescopic member 22 drives the top paper member 21 to move in the vertical direction. When the cigarette paper 8 is in the running or stopped state, it is only subjected to the vertical force given by the top paper part.

[0031] Exemplarily, the telescopic member 22 and the paper top member 21 can both be long cylinders, the driving unit 1 can be a cylinder, the cylinder can be arranged above the upper glue member 5, the top of the telescopic member 22 is detachably fixedly connected to the cylinder, so that the cylinder drives the telescopic member 22 to be pushed out or pulled back in the vertical direction, and the paper top member 21 is detachably fixedly connected to the rear end of the telescopic member 22, and follows the telescopic member 22 to run in the vertical direction. When the cylinder pulls back the telescopic member 22, the paper top member 21 follows the telescopic member 22 to run upward in the vertical direction, and pushes the cigarette paper 8 upward, so that the cigarette paper 8 is away from the upper glue member 5; when the cylinder pushes out the telescopic member 22, the paper top member 21 follows the telescopic member 22 to run downward in the vertical direction, and puts down the cigarette paper 8, so that the cigarette paper 8 returns to the original running position.

[0032] It is understandable that the driving unit 1 can also be other driving structures such as a stepping motor, a driving motor, etc., which can drive the telescopic member 22 to be telescopic relative to the cigarette paper 8.

[0033] It can be understood that the stretchable range of the cigarette paper 8 between the first paper guide roller 6 and the second paper guide roller 7 can be obtained by the material of the cigarette paper 8 and by performing multiple stretching tests.

[0034] See also Figure 1 and Figure 2 , the configuration of the top paper member 21 specifically includes:

[0035] As an implementation method, the paper top member 21 is not arranged perpendicular to the wall panel 4. For example, the paper top member 21 can be arranged upwardly tilted at the rear end of the telescopic member 22. When the telescopic member 22 is retracted, the front end of the paper top member 21 lifts the cigarette paper 8.

[0036] As a preferred embodiment, the paper top member 21 is arranged vertically to the wall panel 4, and the paper top member 21 is always in a horizontal state. When the telescopic member 22 is retracted, the paper top member 21 lifts up the cigarette paper 8 as a whole.

[0037] See also Figure 1 and Figure 2 When the upper glue member 5 does not need to be cleaned or maintained, the top paper member 21 can be arranged in contact with the lower surface of the cigarette paper 8, so that the top paper member 21 can also guide the movement of the cigarette paper 8, making the movement of the cigarette paper 8 more stable.

[0038] In order to optimize the guiding and stabilizing effect of the paper guiding device of the present application on the cigarette paper 8, the paper guiding device of the present application also includes a paper pressing member 23. The paper pressing member 23 and the paper top member 21 are respectively provided on both sides of the cigarette paper 8, and the paper pressing member 23 is arranged above the paper top member 21.

[0039] Exemplarily, the paper pressing member 23 and the paper top member 21 can both be cylindrical, and can be arranged vertically and parallelly on both sides of the cigarette paper 8 and the tail end of the telescopic member 22, and the paper pressing member 23 and the paper top member 21 are arranged perpendicular to the telescopic member 22, and the distance between the paper pressing member 23 and the paper top member 21 is not less than the thickness of the cigarette paper 8, and the distance between the paper pressing member 23 and the paper top member 21 can be adaptively adjusted according to actual conditions. When the telescopic member 22 retracts, the paper top member 21 lifts up the cigarette paper 8, and the paper pressing member 23 does not contact the cigarette paper 8, which is convenient for maintenance personnel to maintain and clean the glue-applying member 5; when the telescopic member 22 extends, the paper top member 21 gradually does not contact the cigarette paper 8, and the paper pressing member 23 does not contact the cigarette paper 8 at all times. The final stop position of the paper pressing member 23 specifically includes:

[0040] As an implementable embodiment, the paper pressing member 23 stays above the cigarette paper 8 but does not contact the cigarette paper 8, that is, the paper pressing member 23 and the paper top member 21 ultimately do not interfere with the cigarette paper 8, and the cigarette paper 8 runs according to the running route of the original paper guide mechanism, but the paper pressing member 23 and the paper top member 21 are respectively arranged on the upper and lower sides of the cigarette paper 8 to achieve the purpose of limiting. When the cigarette paper 8 shakes during operation, the paper pressing member 23 and the paper top member 21 will keep the relative position between the cigarette paper 8 and the glue-applying member 5 basically unchanged.

[0041] As another possible implementation mode, the paper pressing member 23 applies downward pressure to the cigarette paper 8. After the cigarette paper 8 is pressed downward by the paper pressing member 23, the gluing section of the cigarette paper 8 is more stable during operation and is not easy to shake. The paper pressing member 23 and the top paper member 21 have a guiding and limiting effect on the cigarette paper 8, so that the relative position between the cigarette paper 8 and the gluing member 5 remains basically unchanged. When the cigarette paper 8 is running, the paper pressing member 23 always exerts downward pressure on the cigarette paper 8, and the top paper member 21 does not contact the cigarette paper 8.

[0042] In order to make the force on the cigarette paper 8 more uniform when the paper pressing member 23 and the paper pushing member 21 apply pressure to the cigarette paper 8, the lengths of the paper pressing member 23 and the paper pushing member 21 are both greater than the width of the cigarette paper 8, so that the force on the cigarette paper 8 is more uniform and not easily damaged when the paper pressing member 23 and the paper pushing member 21 apply pressure to the cigarette paper 8.

[0043] It is understandable that when the paper pressing member 23 and the paper pushing member 21 apply pressure to the cigarette paper 8 , the applied pressure is controlled within the tolerable range of the cigarette paper 8 , that is, the pressure is applied to the cigarette paper 8 within the allowable range of the tension of the cigarette paper 8 .

[0044] In order to make the telescopic member 22 more stable when the driving clamping part is running, please refer to Figure 2 and Figure 3In a specific embodiment of the present application, a plurality of parallel telescopic members 22 are provided and are transmission-connected with the driving unit 1, and the driving unit 1 drives each telescopic member 22 to operate synchronously and in the same direction. In order to make the installation of the paper-pushing member 21 and the paper-pressing member 23 on the telescopic member 22 more stable, the paper-guiding device of the present application further includes a fixing member 24, and the paper-pushing member 21 and the paper-pressing member 23 are both connected to the telescopic member 22 through the fixing member 24.

[0045] Exemplarily, two parallel telescopic members 22 may be provided, one end of each telescopic member 22 is connected to the driving unit 1 in a transmission manner, and the driving unit 1 drives each telescopic member 22 to run synchronously and in the same direction in the vertical direction. The fixing member 24 may include a first fixing plate 241 and a second fixing plate 242. The lengths of the first fixing plate 241 and the second fixing plate 242 are consistent, and the thickness of the second fixing plate 242 is greater than that of the first fixing plate 241. The first fixing plate 241 and the second fixing plate 242 are stacked, and the first fixing plate 241 is detachably fixedly connected to the top of the second fixing plate 242. The left and right ends of the first fixing plate 241 are detachably fixedly connected to the two telescopic members 22, respectively, and each telescopic member 22 is arranged perpendicular to the first fixing member 24. The telescopic members 22 and the fixing members 24 do not interfere with each other with the wall panel 4. The arrangement of the paper pressing member 23 and the paper top member 21 on the fixing member 24 specifically includes:

[0046] As an implementation method, a paper pressing member 23 and a paper lifting member 21 are provided on the fixing member 24. The paper pressing member 23 is detachably fixedly connected to the middle of the first fixing plate 241 and is vertically arranged with the first fixing plate 241; the paper lifting member 21 is detachably fixedly connected to the middle of the second fixing plate 242 and is vertically arranged with the second fixing plate 242. The distance between the paper pressing member 23 and the paper lifting member 21 is slightly greater than the thickness of the cigarette paper 8.

[0047] As another possible implementation, a plurality of paper pressing members 23 and a plurality of paper top members 21 are provided on the fixing member 24. The plurality of paper pressing members 23 can be arranged on the first fixing plate 241 at uniform or uneven intervals along the direction of the cigarette paper 8, and each paper pressing member 23 is vertically and detachably fixedly connected to the first fixing plate 241; the plurality of paper top members 21 can be arranged on the second fixing plate 242 at uniform or uneven intervals along the direction of the cigarette paper 8, and each paper top member 21 is vertically and detachably fixedly connected to the second fixing plate 242. The minimum spacing between the straight line where each paper pressing member 23 is located and the straight line where each paper top member 21 is located is slightly larger than the thickness of the cigarette paper 8. The plurality of paper pressing members 23 and the plurality of paper top members 21 can be arranged crosswise or correspondingly, specifically including:

[0048] As an implementable embodiment, each paper pushing member 21 is arranged corresponding to the interval between adjacent paper pressing members 23 .

[0049] As another possible implementation mode, each paper pressing member 23 is provided corresponding to a paper pushing member 21 .

[0050] See also Figure 1-3 In order to improve the convenience of installation and subsequent adjustability of the paper guide device of the present application, the paper guide device of the present application is arranged based on the mounting plate 3, and the mounting plate 3 can be provided with an adjustment hole to facilitate adjustment of the installation height of the mounting plate 3, so that the paper guide device and the cigarette paper 8 are more compatible.

[0051] Exemplarily, the mounting plate 3 can be a wide plate with a right-angle groove, a right-angle groove is provided at the lower right corner of the wide plate, the right-angle groove is correspondingly arranged above the second paper guide roller 7, the adjustment hole can include a first long hole and a second long hole, the first long hole starts in the vertical direction above the right-angle groove, the second long hole is opened in the vertical direction on the left side of the right-angle groove, the lengths of the first long hole and the second long hole are consistent, the wide plate is detachably fixedly connected to the wall plate 4 through the first long hole and the second long hole. A paper guide device is arranged on the left side of the wide plate, the driving part 1 is arranged in the vertical direction and detachably fixedly connected to the wide plate, and the paper guide part 2 does not interfere with the wide plate.

[0052] See also Figure 1-3 In a specific embodiment of the present application, the operation steps of the paper guide device of the present application include:

[0053] When the cigarette paper 8 is running, the positions of the paper pressing member 23 and the paper top member 21 are the initial positions and remain unchanged. The paper pressing member 23 slightly presses down the cigarette paper 8, and the paper top member 21 does not contact the cigarette paper 8. When the upper glue member 5 needs to be maintained or cleaned, first, the cigarette paper 8 is stopped, and then the drive unit 1 drives the telescopic member 22 to retract, the paper pressing member 23 gradually stops contacting the cigarette paper 8, and the paper top member 21 gradually pushes the cigarette paper 8 upward. The telescopic member 22 retracts to a predetermined position and remains unchanged. At this time, there is enough space between the cigarette paper 8 and the upper glue member 5 for the operator to maintain and clean the upper glue member 5. After the maintenance and cleaning are completed, the drive unit 1 drives the telescopic member 22 to extend, and the paper top member 21 and the paper pressing member 23 return to the initial position. Finally, the cigarette paper 8 is restored to operation.

[0054] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0056] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation methods, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A paper guiding device, characterized in that: The wall panel (4) is arranged based on the paper guide mechanism inside the cigarette making machine, comprising a driving part (1) and a paper guide part (2), wherein the driving part (1) is connected to the paper guide part (2) by transmission, the running path of the paper guide part (2) is arranged to intersect with the paper path of the cigarette paper (8), and the driving part (1) drives the paper guide part (2) to drive the cigarette paper (8) to run in a direction away from the gluing part (5).

2. The paper guiding device according to claim 1, characterized in that: A first paper guide roller (6) and a second paper guide roller (7) are provided on the wall panel (4); the paper guide device is provided between the first paper guide roller (6) and the second paper guide roller (7); and the operating range of the paper guide portion (2) is smaller than the stretchable range of the cigarette paper (8) between the first paper guide roller (6) and the second paper guide roller (7).

3. The paper guiding device according to claim 1, characterized in that: The paper guide portion (2) comprises a paper top member (21) and a telescopic member (22); one end of the telescopic member (22) is transmission-connected to the driving portion (1); the other end of the telescopic member (22) is provided with the paper top member (21); the paper top member (21) is arranged below the cigarette paper (8); the driving portion (1) drives the telescopic member (22) to move in a direction away from the upper glue member (5), so that the paper top member (21) lifts the cigarette paper (8) in a direction away from the upper glue member (5).

4. The paper guiding device according to claim 3, characterized in that: The paper-pushing member (21) is arranged perpendicular to the telescopic member (22).

5. The paper guiding device according to claim 3, characterized in that: It also comprises a paper pressing member (23), wherein the paper pressing member (23) and the paper top member (21) are respectively provided on two sides of the cigarette paper (8), and the paper pressing member (23) is arranged above the paper top member (21).

6. The paper guiding device according to claim 5, characterized in that: The paper pressing member (23) is arranged parallel to the paper pushing member (21).

7. The paper guiding device according to claim 5, characterized in that: It also comprises a fixing member (24), wherein the fixing member (24) is arranged at the end of the telescopic member (22), and the paper-pushing member (21) and the paper-pressing member (23) are both connected to the telescopic member (22) via the fixing member (24).

8. The paper guiding device according to claim 7, characterized in that: The paper pushing member (21) and the paper pressing member (23) are both arranged in the middle of the fixing member (24).

9. The paper guiding device according to claim 3, characterized in that: The telescopic member (22) telescopes in the vertical direction, so that the paper top member (21) can adjust the paper path of the cigarette paper (8) in the vertical direction.

10. The paper guiding device according to claim 3, characterized in that: The plurality of parallel telescopic members (22) are transmission-connected to the driving unit (1), and the driving unit (1) drives the telescopic members (22) to telescope synchronously and in the same direction.

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