Adsorption roller

Abstract

An adsorption roller is provided with roller surface air suction holes with different air suction durations, a fixed air suction core pipe is sleeved with a roller body, a sealing block with the top face in close contact with the inner wall of the roller body is fixed to the air suction core pipe, and an open hole communicated with the air suction core pipe is formed in the top face of the sealing block. The roller surface air suction holes with different air suction durations respectively form inner wall holes which are separated from one another and are positioned on different vertical axial surfaces on the inner wall of the roller body, and each inner wall hole corresponds to an open hole which is positioned on the same vertical axial surface as the inner wall hole and is formed in the top surface of the sealing block; the open holes corresponding to the inner wall holes corresponding to the roller surface air suction holes have different lengths in the circumferential direction of the roller body. The suction roller has the advantages that all the roller surface suction holes with different suction durations can quickly form enough suction force, so that the rotation speed of the suction roller can be increased under the condition of ensuring that all the roller surface suction holes with different suction durations can quickly form suction force within a short time, and the requirement of high-speed operation of the suction roller is met.

Description

Technical Field

[0001] The invention relates to an adsorption roller used in paper processing equipment such as a paper towel folding machine and a rewinding machine. Background Art

[0002] The adsorption roller is a rotating roller with suction holes on the roller surface, which is widely used in various paper processing equipment such as paper towel folding machines and rewinding machines. In some applications, it is required that different suction holes on the roller surface have different suction durations during each rotation of the adsorption roller. In order to realize the function that the suction holes on the two parts of the roller surface have different suction durations, the existing adsorption roller is provided with two suction paths separated from each other, and the suction durations of the different suction holes on the roller surface are respectively controlled through these two suction paths. Specifically, one of the suction paths is an air flow channel opened in the wall thickness of the roller body and running along the length of the roller body, and a part of the suction holes on the roller surface are connected to the air flow channel. The port of the air flow channel is opened on the end face of the roller body, and a fixed suction hood that partially shields the end face of the roller body is provided close to the end face of the roller body. The suction hood is always connected to the vacuum equipment to maintain a negative pressure state. As the adsorption roller rotates, whenever the port of the airflow channel is located in the area shielded by the suction hood, the airflow channel is connected to the suction hood to form negative pressure, and the roller surface suction holes connected to the airflow channel start to inhale air; whenever the port of the airflow channel leaves the area shielded by the suction hood, the airflow channel is connected to the atmosphere to lose negative pressure, and the roller surface suction holes connected to the airflow channel stop inhaling air. In this way, by setting the size of the shielding area of ​​the suction hood on the end face of the roller body, the suction time of the roller surface suction holes connected to the airflow channel can be controlled.

[0003] However, since the airflow channel needs to be periodically connected to the atmosphere, the airflow channel has to go through a process of losing and re-establishing negative pressure during each rotation of the adsorption roller, resulting in the roller surface suction holes connected to the airflow channel being unable to quickly form suction in a short period of time, limiting the increase in the rotation speed of the adsorption roller. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and to provide a suction roller capable of enabling all suction holes on the roller surface with different suction times to form suction force in a shorter time.

[0005] The present invention is implemented as follows: an adsorption roller comprises a sleeve-shaped roller body, roller surface suction holes with different suction time lengths are provided on the roller surface, a fixed suction core tube is sleeved in the roller body, a sealing block is provided between the suction core tube and the inner wall of the roller body, the sealing block is fixed on the suction core tube, the top surface of the sealing block is in close contact with the inner wall of the roller body, the top surface of the sealing block is provided with an opening, the opening passes through the sealing block and is connected to the tube cavity of the suction core tube, in particular, the roller surface suction holes with different suction time lengths respectively pass through the roller body wall surface to form inner wall holes separated from each other in the inner wall surface of the roller body, the inner wall holes separated from each other are located on different vertical axis planes of the roller body, each inner wall hole has the opening opened on the top surface of the sealing block on the same vertical axis plane of the roller body as the inner wall hole corresponding to it, and the openings corresponding to the inner wall holes corresponding to the roller surface suction holes with different suction time lengths have different lengths on the top surface of the sealing block along the circumferential direction of the roller body.

[0006] As the best embodiment, the roller surface air suction holes are divided into multiple groups, and the multiple groups of roller surface air suction holes are arranged in a row along the axial direction of the roller body. Each group of roller surface air suction holes is composed of roller surface air suction holes with different air suction times, and each group of roller surface air suction holes has the corresponding sealing block.

[0007] As the best implementation, there is only one sealing block corresponding to each group of roller surface suction holes.

[0008] As a best implementation, the openings of different lengths on the top surface of each sealing block are laterally merged into one large hole.

[0009] As a best implementation, the row of roller surface suction holes is arranged in multiple rows along the circumferential direction of the roller body.

[0010] The advantage of the present invention is that it abandons the air flow channel that needs to be periodically connected to the atmosphere in the wall thickness of the roller body in the prior art. All the roller surface suction holes with different suction times form negative pressure by relying on the suction core tube that does not need to be periodically connected to the atmosphere and can thus maintain the negative pressure more stably, so that all the roller surface suction holes with different suction times can quickly form sufficient suction force, so that the adsorption roller can increase the rotation speed under the condition of ensuring that all the roller surface suction holes with different suction times can quickly form suction force in a shorter time, thereby meeting the requirement of high-speed rotation of the adsorption roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 1 BB cross-sectional view; Figure 4 yes Figure 1 CC section view; Figure 5 Yes Figure 1 The structural diagram of the roller body after being cut along the axis; Figure 6 is a structural diagram of Embodiment 2 of the present invention; Figure 7 is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 8 is a structural diagram of Embodiment 4 of the present invention; Fig. 9 yes Figure 8 DD cross-sectional view; Fig.10 yes Figure 8 EE cross-sectional view; Fig.11 is a structural diagram of Embodiment 5 of the present invention; Fig.12 is a structural diagram of Embodiment 6 of the present invention; Fig.13 Yes Fig.12 The structural diagram of the roller body after being cut along the axis; Fig.14 is a structural diagram of Embodiment 7 of the present invention; Fig.15 yes Fig.14 Stereoscopic image of Fig.16 is a schematic diagram of the structure of Embodiment 8 of the present invention; Fig.17 yes Fig.16 Stereoscopic image of Fig.18 is a schematic diagram of the structure of Embodiment 9 of the present invention; Fig.19 It is a structural diagram of embodiment 10 of the present invention. DETAILED DESCRIPTION

[0012] To facilitate understanding of the present invention, a more comprehensive description is given below in conjunction with the accompanying drawings. The accompanying drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood. Embodiment 1

[0013] An embodiment of the adsorption roller of the present invention is as follows Figure 1 shown. Figure 1 Only a small section of the suction roller is shown. See also Figure 1 , Figure 2The suction roller comprises a sleeve-shaped roller body 1, in which a fixed suction core tube 2 is sleeved. A sealing block 3 is arranged between the suction core tube 2 and the inner wall of the roller body 1, and the sealing block 3 is fixed on the outer wall of the suction core tube 2, and the top surface of the sealing block 3 is in close contact with the inner wall of the roller body 1. The central axis of the suction core tube 2 and the central axis of the roller body 1 can be collinear or not.

[0014] See also Figure 1 The roller surface of the roller body 1 is provided with two roller surface suction holes 4 and 5 with different suction time lengths. Figure 1 , Figure 3 The roller surface suction hole 4 penetrates the roller body wall surface to form an inner wall hole 6 in the roller body wall. Figure 1 , Figure 4 Another roller surface suction hole 5 penetrates the roller body wall surface to form another inner wall hole 7 in the inner wall of the roller body. The two inner wall holes 6 and 7 are separated from each other and are respectively located on the vertical axis surface Ⅰ-Ⅰ and the vertical axis surface Ⅱ-Ⅱ of the roller body.

[0015] See also Figure 1 , Figure 5 The top surface of the sealing block 3 is provided with openings 8 and 9, and the openings 8 and 9 penetrate the sealing block and are connected to the tube cavity of the suction core tube 2. Figure 1 , Figure 3 , Figure 5 The inner wall hole 6 corresponds to the opening 8, and the two are located together on the vertical axis plane Ⅰ-Ⅰ of the roller body, so that the inner wall hole 6 can communicate with the opening 8 and then communicate with the suction core tube 2 whenever it passes through the top surface of the sealing block 3 as the roller body 1 rotates (because the top surface of the sealing block 3 is in close contact with the inner wall of the roller body 1, so Figure 3 The contour of the opening 8 in the roller coincides with the contour of the inner wall of the roller body 1). See also Figure 1 , Figure 4 , Figure 5 The inner wall hole 7 corresponds to the opening 9, and the two are located together on the other vertical axis surface II-II of the roller body, so that the inner wall hole 7 can be connected with the opening 9 and then connected with the suction core tube 2 whenever it passes through the top surface of the sealing block 3 as the roller body 1 rotates (because the top surface of the sealing block 3 is in close contact with the inner wall of the roller body 1, so Figure 4 The contour line of the opening 9 in the roller body coincides with the contour line of the inner wall of the roller body 1). Figure 1 , Figure 5 As shown, since the opening 8 and the opening 9 have different lengths on the top surface of the sealing block 3 along the circumferential direction of the roller body, the opening 8 is shorter than the opening 9, so the time for the inner wall hole 6 to pass through the opening 8 is shorter, and the time for the inner wall hole 7 to pass through the opening 9 is longer, so that the suction time of the roller surface suction hole 4 corresponding to the inner wall hole 6 is shorter, and the suction time of the roller surface suction hole 5 corresponding to the inner wall hole 7 is longer.

[0016] When the adsorption roller is working, the fixed suction core tube 2 remains connected to the vacuum pumping equipment. As the roller body 1 rotates, whenever the inner wall hole 6 passes through the top surface of the sealing block 3, the roller surface suction hole 4 is connected to the tube cavity of the suction core tube 2, and the roller surface suction hole 4 inhales air. At other times, the roller surface suction hole 4 stops inhaling air. Similarly, whenever the inner wall hole 7 passes through the top surface of the sealing block 3, the roller surface suction hole 5 is connected to the tube cavity of the suction core tube 2, and the roller surface suction hole 5 inhales air. At other times, the roller surface suction hole 5 stops inhaling air. Since the two roller surface suction holes 4 and 5 with different suction times both rely on the suction core tube 2 to form a negative pressure, and the suction core tube 2 is always connected to the vacuum pumping equipment to maintain a relatively stable and sufficient negative pressure, the two roller surface suction holes 4 and 5 with different suction times can quickly form sufficient suction, which is beneficial to increase the rotation speed of the roller body 1. Embodiment 2

[0017] See also Figure 6 The characteristic of this embodiment is that the two roller surface suction holes 4 and 5 with different suction time are located on the same vertical axis plane Ⅰ-Ⅰ, but the inner wall holes 6 and 7 formed by the two roller surface suction holes penetrating to the inner wall of the roller body are still located on two different vertical axis planes Ⅰ-Ⅰ and Ⅱ-Ⅱ respectively. Figure 6 The other structures shown are Figure 1 This embodiment is used to illustrate that the present invention does not require that roller surface suction holes with different suction time lengths must be located on different vertical axis planes, but only requires that the inner wall holes corresponding to roller surface suction holes with different suction time lengths are located on different vertical axis planes. Embodiment 3

[0018] See also Figure 7 The inner wall holes 6a and 6b corresponding to the two roller surface suction holes 4a and 4b with the same suction time are located on the vertical axis plane Ⅰ-Ⅰ, and the inner wall holes 7a and 7b corresponding to the other two roller surface suction holes 5a and 5b with the same suction time are located on another vertical axis plane Ⅱ-Ⅱ. Figure 1 This embodiment is used to illustrate that the inner wall holes corresponding to two or more roller surface suction holes with the same suction time length can be located on the same vertical axis plane. Embodiment 4

[0019] See also Figure 8 , Fig. 9 In this embodiment, based on the third embodiment, two inner wall holes 6a and 6b located on the same vertical axis plane Ⅰ-Ⅰ corresponding to two roller surface suction holes 4a and 4b with the same suction time are connected in parallel to the same inner wall hole 6c. Figure 8 , Fig.10, the two inner wall holes 7a, 7b located on the same vertical axis plane II-II corresponding to the other two roller surface suction holes 5a, 5b with the same suction time are connected in parallel to the same inner wall hole 7c. Figure 1 This embodiment is used to illustrate that if the inner wall holes corresponding to two or more roller surface suction holes with the same suction time are located on the same vertical axis plane, then these inner wall holes can be connected in parallel to the same inner wall hole. Embodiment 5

[0020] See also Fig.11 The difference between this embodiment and the first embodiment is that Figure 5 The sealing block 3 shown is divided into two sealing blocks 3a and 3b, so that each sealing block has only one opening on the top surface. The other structures of this embodiment are the same as those of the first embodiment. This embodiment is used to illustrate that each sealing block may have only one opening on the top surface. Embodiment 6

[0021] See also Fig.12 , Fig.13 The difference between this embodiment and the first embodiment is that the first embodiment Figure 1 and Figure 5 The two openings 8 and 9 of different lengths on the top surface of the sealing block are merged horizontally into a large hole 10 roughly in the shape of a "7". The other structures of this embodiment are the same as those of the first embodiment. The length of the merged large hole 10 at the location of the original two openings 8 and 9 remains unchanged, so that the length of time for the two inner wall holes 6 and 7 to pass through the large hole 10 will not be changed, that is, the length of each suction time of the two roller surface suction holes 4 and 5 will not be changed. This embodiment is used to illustrate that the openings of different lengths on the top surface of the sealing block can be merged horizontally into a large hole. Embodiment 7

[0022] See also Fig.14 , Fig.15 , this embodiment is equivalent to Fig.12 The structure shown is repeatedly arranged along the axial direction of the roller body 1. Fig.15 Each box drawn with imaginary lines represents a group of roller surface suction holes. Each group of roller surface suction holes is composed of two roller surface suction holes 4 and 5 with different suction durations. Each group of roller surface suction holes has a corresponding sealing block 3. This embodiment is used to illustrate that the present invention can divide the roller surface suction holes into multiple groups, and the multiple groups of roller surface suction holes are arranged in a row along the axial direction of the roller body, and each group of roller surface suction holes is composed of roller surface suction holes with different suction durations. Each group of roller surface suction holes has a corresponding sealing block. In this embodiment, each group of roller surface suction holes has only one sealing block corresponding to it, which is the best embodiment and has the simplest structure. As another optional embodiment, each group of roller surface suction holes can also have multiple sealing blocks corresponding to it. For example, Fig.14Each sealing block 3 in the embodiment is replaced with the sealing block 3 in the embodiment 5 Fig.11 The two sealing blocks 3a and 3b shown constitute a structure in which each group of roller surface suction holes corresponds to two sealing blocks.

[0023] It should be noted that the number of roller surface suction holes included in each group of roller surface suction holes may not be equal, depending on the actual application requirements of the adsorption roller. Embodiment 8

[0024] The structures described in the above embodiments can be combined arbitrarily to form a new structure. Fig.14 Each group of roller surface suction holes and corresponding inner wall holes shown in the figure are replaced with those of the fourth embodiment. Figure 8 The roller surface suction holes and inner wall holes shown in the figure constitute Fig.16 and Fig.17 The embodiment shown. Fig.16 Each sealing block 3 in Fig.14 The sealing block 3 is the same as in the Fig.16 A group of roller surface suction holes 4a, 4b, 5a, 5b and inner wall holes 6c, 7c corresponding to each sealing block 3 are Figure 8 There are four roller surface suction holes 4a, 4b, 5a, 5b and inner wall holes 6c, 7c. Fig.17 Each frame drawn with imaginary lines in the figure represents a group of roller surface air suction holes, and each group of roller surface air suction holes is composed of four roller surface air suction holes 4a, 4b, 5a, and 5b. Embodiment 9

[0025] exist Fig.16 On the basis of Fig.16 A whole row of roller surface suction holes is formed by arranging multiple groups of roller surface suction holes along the axial direction of the roller body, and then arranged into multiple rows along the circumferential direction of the roller body, forming a roller surface suction hole. Fig.18 Suction roller shown. Fig.18 Each frame drawn with imaginary lines represents a group of roller surface air suction holes, and each group of roller surface air suction holes is composed of four roller surface air suction holes 4a, 4b, 5a, and 5b as in the eighth embodiment. Embodiment 10

[0026] Fig.19 The suction roller shown can be used as a folding roller of a tissue folder. Fig.18 On the basis of the invention, the same structure as the folding roller of the paper towel folder is added, including a convex knife 11, a V-shaped groove 12 and an annular groove 13 for accommodating the shift fork. Two roller surface suction holes 4a and 4b with the same suction time in each group of roller surface suction holes are located on both sides of the convex knife, and the other two roller surface suction holes 5a and 5b with the same suction time in each group of roller surface suction holes are located on both sides of the V-shaped groove. The suction time of the roller surface suction holes 4a and 4b is shorter than that of the roller surface suction holes 5a and 5b, which meets the use requirements of the folding roller.

[0027] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the scope of protection of the present invention. The scope of protection of the present invention shall be based on the attached claims.

Claims

1. An adsorption roller, comprising a sleeve-shaped roller body, roller surface suction holes with different suction time lengths are arranged on the roller surface, a fixed suction core tube is sleeved in the roller body, a sealing block is arranged between the suction core tube and the inner wall of the roller body, the sealing block is fixed on the suction core tube, the top surface of the sealing block is in close contact with the inner wall of the roller body, an opening is arranged on the top surface of the sealing block, the opening passes through the sealing block and is connected to the tube cavity of the suction core tube, and is characterized by: The roller surface suction holes with different suction time periods respectively penetrate the roller body wall surface to form inner wall holes separated from each other in the inner wall of the roller body, and the inner wall holes separated from each other are located on different vertical axis planes of the roller body, and each inner wall hole has an opening opened on the top surface of the sealing block which is located on the same vertical axis plane of the roller body as the inner wall hole, and each opening corresponding to each inner wall hole corresponding to each roller surface suction hole with different suction time periods has different lengths on the top surface of the sealing block along the circumferential direction of the roller body.

2. The adsorption roller according to claim 1, characterized in that: The roller surface air suction holes are divided into multiple groups, and the multiple groups of roller surface air suction holes are arranged in a row along the axial direction of the roller body. Each group of roller surface air suction holes is composed of roller surface air suction holes with different air suction time lengths, and each group of roller surface air suction holes has the corresponding sealing block.

3. The adsorption roller according to claim 2, characterized in that: There is only one sealing block corresponding to each group of roller surface suction holes.

4. The adsorption roller according to claim 3, characterized in that: The openings of different lengths on the top surface of each sealing block are laterally merged into one large hole.

5. The adsorption roller according to claim 2, characterized in that: The row of roller surface air suction holes is arranged in multiple rows along the circumferential direction of the roller body.

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