Method for stacking paper by paper folding machine and paper folding machine

Abstract

A method for stacking paper materials in a paper folding machine includes: whenever paper materials falling onto a paper receiving member are stacked into a paper stack having a predetermined number of sheets, the stacking member is first intercepted, and then the paper receiving member is used to press the paper stack upward, causing the top of the paper stack to be squeezed by the stacking member. After the squeezing action, the paper receiving member moves downward until the paper stack on the receiving member is separated from the paper materials stacked on the stacking member. The present invention also provides a paper folding machine capable of implementing the method of the present invention. The advantage of the present invention is that the squeezing action can cause the folded corner of a sheet of paper on the top of the paper stack to become sharp due to the squeezing. Thus, when separating the paper stack, the sheet of paper on the top of the paper stack can rely on the shaping effect of the sharp folded corner formed to resist the drag force on its upper half, so that the upper half will not be deflected by the drag force, thereby improving the overall quality of the folded paper towels.

Description

Technical Field

[0001] The present invention relates to a paper folding machine for producing folded paper towels, and in particular to a method for stacking paper in the paper folding machine. Background Art

[0002] The main structure of the paper folding machine is as follows Figure 1 As shown, the paper folding machine comprises a folding mechanism 1 primarily composed of two folding rollers 1a and 1b. Below the folding mechanism 1 are located a paper splicer 2 and a stacking unit 3 for performing a stacking function. During operation, two continuous sheets of paper simultaneously pass through the gap between the two folding rollers 1a and 1b. As the folding rollers rotate, the two continuous sheets are continuously cut and folded into individual sheets, which then fall onto the splicer 2. Whenever a certain number of sheets fall onto the splicer 2, the paper folding machine performs a stacking operation, separating a stack containing a predetermined number of sheets from the stack.

[0003] The existing paper folding machine performs the following steps to stack paper: Figures 2 to 3 Whenever the paper falling from the folding mechanism 1 is stacked on the paper receiving member 2 to form a paper stack 4 with a predetermined number of paper sheets, the paper Figure 2 As shown, the stacking member 3 is used to perform the interception action, so that the stacking member 3 is inserted between the top of the paper stack 4 and the subsequent falling paper, so that the subsequent falling paper is temporarily stacked on the stacking member 3, and then the paper splicing member 2 is immediately Figure 3 As shown in the figure, the paper stack 4 on the paper splicing member 2 is completely separated from the paper materials subsequently stacked on the stacking member 3, thus completing the action of stacking the paper materials.

[0004] Since the paper materials falling from the folding mechanism 1 are Figure 4 As shown in FIG, the upper half of each sheet of paper is always sandwiched between the folded sheets of paper above. Figure 3 In the process of separating the paper stack shown in the figure, there is a friction drag force between the upper half 5 of the top sheet of paper in the paper stack 4 and the lower half 6 of the bottom sheet of paper on the stacking member 3, which can easily cause the separated paper stack to be Figure 5 As shown in the following example. Figure 5 As shown, the upper half 5 of a sheet of paper on the top layer of the paper stack is pulled out of the paper stack, affecting the overall quality of the folded tissue paper. Summary of the Invention

[0005] The present invention aims to provide a method for stacking paper in a paper folding machine, so as to overcome the defect that the top sheet of paper in the stack is easily deviated from the stack. Another object of the present invention is to provide a paper folding machine capable of implementing the method.

[0006] The method of the present invention is implemented as follows: a paper receiving member is used to receive the paper falling from the folding mechanism of the paper folding machine; whenever the paper falling onto the paper receiving member is stacked into a paper stack with a predetermined number of sheets, a stacking member is used to perform an intercepting action, that is, the stacking member is inserted between the top of the paper stack and the subsequently falling paper, so that the subsequently falling paper is temporarily stacked on the stacking member, and then the paper receiving member moves downward until the paper stack on the paper receiving member is separated from the paper stacked on the stacking member. In particular, whenever the stacking member completes the intercepting action, the paper receiving member first performs an action of squeezing the paper stack upward, so that the top of the paper stack is squeezed by the stacking member, and then the paper receiving member moves downward until the paper stack on the paper receiving member is separated from the paper stacked on the stacking member.

[0007] As a best embodiment, during the process of the stacking member performing the intercepting action, the paper splicing member descends rapidly.

[0008] As the best implementation method, after the paper splicer performs the action of squeezing the paper stack upward, it waits for a period of time until the paper materials stacked on the stacking member reaches a certain weight, so that the bottom sheet of paper on the stacking member is pressed by the weight enough to resist the friction and drag force of the top sheet of paper on the stack on the paper splicer without shifting. After that, the paper splicer moves downward until the paper stack on the paper splicer is separated from the paper materials stacked on the stacking member.

[0009] As a best embodiment, the stacking members are arranged at intervals in the width direction of the paper material, and the squeezing force of the paper splicing member pressing the paper stack upward causes the top of the paper stack to arch upward in the arrangement interval of the stacking members and fill the interval.

[0010] The paper folding machine of the present invention is realized as follows: it includes a paper receiving member for receiving the paper falling from the folding mechanism of the paper folding machine; a stacking member, which is inserted between the top of the paper stack and the subsequently falling paper whenever the paper falling on the paper receiving member is stacked into a paper stack with a predetermined number of papers, so that the subsequently falling paper is temporarily stacked on the stacking member; and a lifting member connected to the paper receiving member, which drives the paper receiving member to move upward when the stacking member has been inserted between the top of the paper stack and the subsequently falling paper. The lifting member drives the paper receiving member to move downward until the paper stack on the paper receiving member is separated from the paper materials stacked on the stacking member. In particular, a cylinder is connected between the lifting member and the paper receiving member, and the lifting member drives the cylinder to rise and fall together. Whenever the stacking member has been inserted between the top of the paper stack and the subsequently falling paper materials, the cylinder drives the paper receiving member to squeeze the paper stack upward so that the top of the paper stack is squeezed by the stacking member. After that, the lifting member drives the paper receiving member to move downward until the paper stack on the paper receiving member is separated from the paper materials stacked on the stacking member.

[0011] As the best embodiment, the paper splicers are arranged at intervals in the width direction of the paper material, all the paper splicers are fixed on the same beam, the lifting member is fixed with a guide rail, the beam is slidably connected to the guide rail, and the cylinder is connected between the beam and the lifting member.

[0012] As a best embodiment, the crossbeam is fixed with a limiting member, and when the cylinder drives the crossbeam to be lowered to the lowest position, the limiting member abuts against the lifting member.

[0013] The advantage of the present invention is that before separating the paper stack, the paper splicer first presses the paper stack upward so that the top of the paper stack is squeezed by the stacking member. This allows the folded corner of the top sheet of paper in the stack to become sharp due to the squeezing. Thus, when the paper splicer moves downward to separate the paper stack, the top sheet of paper in the stack can rely on the shaping effect of the sharp folded corner formed to resist the drag force on its upper half, so that its upper half will not be deviated due to the drag force. This avoids the occurrence of Figure 5 The defects shown improve the overall quality of the folded tissue paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of an existing paper folding machine;

[0015] Figures 2 to 3 This is a schematic diagram of the process of stacking paper in an existing paper folding machine;

[0016] Figure 4 It is a schematic diagram of paper materials stacked together in a mutually interlaced manner;

[0017] Figure 5 It is a schematic diagram showing defects in the paper stacks separated by the existing paper folding machine;

[0018] Figure 6 Schematic diagram of the paper splicer according to the method of the present invention squeezing the paper stack upward;

[0019] Figure 7 It is a schematic diagram of the main structure of the paper folding machine of the present invention;

[0020] Figure 8 is a schematic diagram of a stacking element being inserted into the top of a paper stack;

[0021] Figure 9 It is a schematic diagram of the lifting moving part driving the paper receiving part to move downward;

[0022] Figure 10 It is a schematic diagram of the paper splicer squeezing the paper stack upward;

[0023] Figure 11It is a three-dimensional schematic diagram of the connection structure of the paper splicing parts, cylinders, and lifting parts. DETAILED DESCRIPTION

[0024] The present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided solely to facilitate a more thorough and comprehensive understanding of the present disclosure.

[0025] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0026] The method for stacking paper materials by the paper folding machine of the present invention has the same action flow as that of the existing paper folding machine. Figure 1 As shown, the paper receiving member 2 receives the paper falling from the folding mechanism 1. Whenever the paper falling on the paper receiving member 2 is stacked into a paper stack 4 with a predetermined number of paper sheets, Figure 2 As shown, the stacking element 3 performs the interception action, and the stacking element 3 is inserted between the top of the paper stack 4 and the subsequent falling paper materials, so that the subsequent falling paper materials are temporarily stacked on the stacking element 3. Figure 3 Instead of executing the action shown Figure 6 In the action shown, the paper receiving member 2 presses the paper stack 4 upwards, so that the top of the paper stack 4 is pressed by the stacking member 3. During the pressing process, the folded corner of the top sheet of paper in the paper stack 4 becomes sharp due to the pressing. Figure 6 After the action of squeezing the paper stack shown, the paper folding machine performs Figure 3 In the action shown, the paper receiving member 2 moves downward until the paper stack 4 is completely separated from the paper stacked on the stacking member 3, thus completing the process of stacking the paper. Figure 3 In the process of separating the paper stack shown in FIG, there is still a friction drag force between the upper half 5 of the top sheet of paper in the paper stack 4 and the lower half 6 of the bottom sheet of paper on the stacking element 3. However, after Figure 6 After the squeezing action shown in the figure, the top sheet of paper in the stack 4 can rely on the shaping effect of the sharp corners formed to resist the drag force on its upper half, so that the upper half 5 of the paper will not be deflected by the drag force. Figure 5 The defects shown improve the overall quality of the folded tissue paper.

[0027] go through Figure 3After the steps shown, the next action of the paper folding machine does not belong to the action process of stacking paper described in the present invention, but in order to have a more complete description of the working principle of the paper folding machine, it is still described as follows: After the paper receiving member 2 moves downward to completely separate the paper stack from the paper stacked on the stacking member 3, the paper stack on the paper receiving member 2 is removed by other mechanisms in the paper folding machine, and the paper receiving member 2 is then reset upward to a position slightly higher than the stacking member 3, so that the paper temporarily stacked on the stacking member 3 is transferred to the paper receiving member 2, and the stacking member 3 is then reset to Figure 1 The paper folding machine is again in the position shown. Figure 1 The state shown begins to enter the next action cycle. It should be noted that the paper splicing member 2 and the stacking member 3 are in the width direction of the paper material, that is, perpendicular to the width of the paper material. Figure 1 They are staggered with each other in the direction of the drawing plane, so the paper splicing member 2 can move to a position higher than the stacking member 3 without interfering with the movement of the stacking member 3.

[0028] In a preferred embodiment, while the stacking element 3 is performing the intercepting action, that is, while the stacking element 3 is being inserted toward the top of the paper stack 4, the paper splicer 2 descends rapidly. This rapid descent of the paper splicer 2 causes the paper stack on the splicer 2 to be weightless or nearly weightless, thereby widening the opening formed by the paper fold, making it easier for the stacking element 3 to be inserted into the paper fold.

[0029] As the best embodiment, the paper splicer 2 performs Figure 6 After the upward squeezing action of the paper stack shown, a period of waiting is performed until the paper materials stacked on the stacking member 3 reach a certain weight, so that the bottom sheet of paper on the stacking member 3 can resist the friction and drag force exerted on it by the top sheet of paper on the paper splicing member 2 without shifting. Then, the paper splicing member 2 moves downward until the paper stack on the paper splicing member 2 is separated from the paper materials stacked on the stacking member 3. During this waiting period, the squeezing force of the paper splicing member 2 on the paper stack can be maintained or released.

[0030] The stacking pieces 3 are spaced apart in the width direction of the paper material, that is, perpendicular to the width of the paper material. Figure 1 In order to prevent the paper materials falling on the stacking member 3 from sinking due to lack of support at the arrangement interval of the stacking member 3, the paper receiving member 2 is arranged in a spaced manner. Figure 6 When the paper stack is pressed upward as shown, the pressing force should be large enough to cause the top of the paper stack to arch upward in the arrangement interval of the stacking element 3 and fill the arrangement interval of the stacking element 3. In this way, the paper materials falling onto the stacking element 3, especially the paper materials initially falling onto the stacking element 3, can be better supported.

[0031] It should be noted that the method of the present invention can be implemented using an existing paper folding machine without changing the structure of the existing paper folding machine. It can be implemented by simply controlling the paper splicing member and the stacking member according to the process described in the method of the present invention. However, if the method of the present invention is implemented using an existing paper folding machine, the lifting member that drives the paper splicing member to separate the paper stacks must also drive the paper splicing member to complete the upward squeezing of the paper stacks. This increases the frequency of repeated switching of the operating direction of the related drive mechanism that drives the lifting member, increases the impact on the related drive mechanism, and shortens the service life of the related drive mechanism. To this end, the present invention provides a paper folding machine that can both implement the method of the present invention and solve the aforementioned problems.

[0032] See also Figure 7 The paper folding machine of the present invention comprises a paper receiving member 2, a stacking member 3 and a lifting member 7. The paper receiving member 2 is used to receive the paper falling from the folding mechanism 1. Whenever the paper falling to the paper receiving member 2 is stacked into a paper stack with a predetermined number of sheets, as shown in FIG. Figure 8 As shown, the stacking member 3 is inserted between the top of the paper stack 4 and the subsequent paper materials, so that the subsequent paper materials are temporarily stacked on the stacking member 3. The lifting member 7 is slidably connected to the guide rail 8 fixed to the frame, and the lifting member 7 can be raised and lowered along the guide rail 8. The lifting member 7 is connected to the paper receiving member 2. Whenever the stacking member 3 is Figure 8 When it has been inserted between the top of the paper stack 4 and the subsequent falling paper, the lifting moving member 7 is as shown in FIG. Figure 9 As shown, the paper splicing member 2 is driven to move downward until the paper stack 4 on the paper splicing member 2 is completely separated from the paper materials stacked on the stacking member 3.

[0033] The paper folding machine is characterized in that a cylinder 9 is connected between the lifting member 7 and the paper receiving member 2, and the lifting member 7 drives the cylinder 9 to rise and fall together. Figure 8 When it has been inserted between the top of the paper stack and the subsequent falling paper, the cylinder 9 is first Figure 10 As shown in FIG, the paper receiving member 2 is driven to press the paper stack 4 upward, so that the top of the paper stack 4 is squeezed by the stacking member 3, and then the lifting member 7 is moved as shown in FIG. Figure 9 As shown, the paper splicing member 2 is driven to move downward until the paper stack 4 on the paper splicing member is separated from the paper materials stacked on the stacking member 3.

[0034] Since the action of the paper splicer 2 squeezing the paper stack upward is not completed by the lifting member 7 that drives the paper splicer to separate the paper stack, but is completed by the cylinder 9 driving the paper splicer 2, this reduces the frequency of repeated switching of the operating direction of the related driving mechanism that drives the lifting member 7 up and down, and also reduces the impact on the related driving mechanism, thereby extending the service life of the related driving mechanism. Figure 7In the illustrated embodiment, the driving mechanism for driving the lifting member 7 up and down is a synchronous belt drive mechanism, wherein a servo motor drives the synchronous belt 10 to reciprocate, and the synchronous belt 10 drives the lifting member 7 up and down. The driving mechanism for driving the lifting member 7 up and down may also be a gear rack mechanism, a linear motor, or other driving mechanism.

[0035] As the best implementation, see also Figure 7 、 Figure 11 , the paper splicing pieces 2 are arranged at intervals in the width direction of the paper material, that is, perpendicular to Figure 7 The paper splicers 2 are arranged in a spaced relationship in the direction of the drawing plane. All the paper splicers 2 are fixed on the same crossbeam 11. The lifting member 7 is fixed with a guide rail 12. The crossbeam 11 is slidably connected to the guide rail 12. The cylinder 9 is connected between the crossbeam 11 and the lifting member 7. The cylinder 9 drives all the paper splicers 2 to move together through the crossbeam 11.

[0036] As a best practice, see Figure 11 The crossbeam 11 is fixed with a limiting member 13. When the cylinder 9 drives the crossbeam 11 to be lowered to the lowest position, the limiting member 13 abuts against the lifting moving member 7.

[0037] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of this invention shall be based on the attached claims.

Claims

1. A method for stacking paper in a paper folding machine, comprising: using a paper splicer to receive paper falling from a folding mechanism of the paper folding machine; whenever the paper falling onto the paper splicer is stacked into a paper stack having a predetermined number of sheets, the stacking member performs an intercepting action, that is, the stacking member is inserted between the top of the paper stack and the subsequently falling paper, thereby temporarily stacking the subsequently falling paper onto the stacking member; thereafter, the paper splicer moves downward until the paper stack on the paper splicer is separated from the paper stacked on the stacking member, wherein the method is characterized by: Whenever the stacking member completes the intercepting action, the paper splicing member first performs the action of pressing the paper stack upward so that the top of the paper stack is pressed by the stacking member, and then the paper splicing member moves downward until the paper stack on the paper splicing member is separated from the paper stacked on the stacking member; After the paper splicer performs the action of squeezing the paper stack upward, it waits for a period of time until the paper materials stacked on the stacking member reach a certain weight, so that the bottom sheet of paper on the stacking member can withstand the friction and drag force of the top sheet of paper on the paper splicer without shifting. Then, the paper splicer moves downward until the paper stack on the paper splicer is separated from the paper materials stacked on the stacking member.

2. The method for stacking paper using a paper folding machine according to claim 1, wherein: During the process of the stacking member performing the intercepting action, the paper splicing member descends rapidly.

3. The method for stacking paper using a paper folding machine according to claim 1, wherein: The stacking members are arranged at intervals in the width direction of the paper material, and the squeezing force of the paper splicing member pressing the paper stack upwards causes the top of the paper stack to arch upwards in the arrangement interval of the stacking members and fill the interval.

4. A paper folding machine, comprising a paper receiving member for receiving paper falling from a folding mechanism of the paper folding machine; a stacking member, which is inserted between the top of the paper stack and the subsequently falling paper whenever the paper falling on the paper receiving member is stacked into a paper stack with a predetermined number of papers, so that the subsequently falling paper is temporarily stacked on the stacking member; a lifting member connected to the paper receiving member, which drives the paper receiving member to move downward until the paper stack on the paper receiving member is separated from the paper stacked on the stacking member whenever the stacking member has been inserted between the top of the paper stack and the subsequently falling paper. A cylinder is connected between the lifting member and the paper receiving member, and the lifting member drives the cylinder to rise and fall together. Whenever the stacking member has been inserted between the top of the paper stack and the subsequently falling paper, the cylinder drives the paper receiving member to squeeze the paper stack upward, so that the top of the paper stack is squeezed by the stacking member. After that, it waits for a period of time until the paper stacked on the stacking member reaches a certain weight, so that the bottom sheet of paper on the stacking member is sufficient to resist the friction and drag force of the top sheet of paper on the paper stack on the paper receiving member under the pressure of this weight without shifting. The lifting member then drives the paper receiving member to move downward until the paper stack on the paper receiving member is separated from the paper stacked on the stacking member.

5. A paper folding machine according to claim 4, characterized in that: The paper splicing parts are arranged at intervals in the width direction of the paper material, and all the paper splicing parts are fixed on the same beam. The lifting moving part is fixed with a guide rail, the beam is slidably connected to the guide rail, and the cylinder is connected between the beam and the lifting moving part.

6. A paper folding machine according to claim 5, characterized in that: The crossbeam is fixed with a limiting piece, and when the cylinder drives the crossbeam to be lowered to the lowest position, the limiting piece abuts against the lifting moving piece.

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