Pressing device and edge banding machine

Abstract

The invention relates to the technical field of plate edge banding, in particular to a pressing device and an edge banding machine, the pressing device comprises a pressing beam and a pressing wheel seat located below the pressing beam, the pressing beam comprises two vertical plates parallel to each other and a transverse plate located between the two vertical plates, and a plurality of swing shafts are arranged in the length direction of the vertical plates; the two ends of each swing shaft are connected to the corresponding vertical plates, and the multiple swing shafts are arranged in a straight line and located below the transverse plate. A plurality of pressing wheel seats are correspondingly arranged on the swing shafts, each pressing wheel seat is provided with a pressing wheel, and a needle bearing is arranged between each pressing wheel and the corresponding pressing wheel seat. The bearing capacity of the needle bearing is higher, the operation stability and the service life can be guaranteed when the needle bearing faces large counter-acting force and eccentric force of the needle bearing, the better plate pressing effect is achieved, and therefore the edge sealing quality is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of panel edge banding, and in particular to a clamping device and an edge banding machine. Background Art

[0002] With the development of the market and technology, customized furniture is becoming more and more popular. In order to adapt to the new market demand, various furniture factories need various edge banding production equipment. There is also an increasing demand for the production of narrow boards. Although some of the narrow board edge banding machines on the market can seal narrow boards of mainly 40mm, it is difficult to guarantee the processing quality regardless of whether the long or short edge feeding is used.

[0003] The main difficulty is that the width of the narrow plate is smaller than the width of the pressing wheel. During the compression and conveying process of the long side of the narrow plate, the reaction force exerted on the pressing wheel by the narrow plate is an eccentric force. After a long time, the pressing wheel is misaligned and the pressing force is insufficient, thus shortening its service life.

[0004] Therefore, it becomes very urgent and important to design a more reasonable elastic pressure wheel clamping device for edge banding machines to improve the clamping force during narrow plate edge banding processing, while ensuring flexible buffering and smooth transition during the conveying of the plates, thereby improving the quality of plate edge banding and meeting market demand. Summary of the invention

[0005] Therefore, the present invention provides a pressing device and an edge banding machine to improve the pressing effect of existing narrow plates and solve the problems of the service life of the edge banding machine.

[0006] A pressing device, comprising:

[0007] A pressure beam, comprising two vertical plates parallel to each other and a horizontal plate located between the two vertical plates, a plurality of swing shafts are arranged along the length direction of the vertical plates, both ends of each swing shaft are respectively connected to the corresponding vertical plates, and the plurality of swing shafts are arranged in a straight line and are all located below the horizontal plate;

[0008] A plurality of pressing wheel seats are correspondingly arranged on each of the swing shafts, each of the pressing wheel seats is provided with a pressing wheel suitable for pressing the plate, and a needle bearing is arranged between the pressing wheel and the corresponding pressing wheel seat.

[0009] Specifically, two pressing wheel seats are arranged on each of the swing shafts, the two pressing wheel seats are arranged side by side, and a clamping wheel is arranged on each of the two pressing wheel seats.

[0010] Specifically, the pressing wheels on the two pressing wheel seats arranged side by side are arranged in a front-to-back staggered manner.

[0011] Specifically, the pressure wheel seat includes a connection portion connected to the swing shaft and a wheel-carrying portion located below the swing shaft, and the wheel-carrying portion is suitable for mounting the pressure wheel.

[0012] Specifically, a bushing is provided between the connecting portion and the swing shaft.

[0013] Specifically, a pressure wheel shaft is provided on the carrying wheel portion, and the pressure wheel is installed on the pressure wheel shaft.

[0014] Specifically, the intervals between adjacent swing shafts are equal, and one of the pressing wheels on the same swing shaft is located below the adjacent swing shaft, and the other pressing wheel is located in the middle of the adjacent swing shaft.

[0015] Specifically, a compression spring is provided between the pressure wheel seat and the horizontal plate, the compression spring is staggered with the adjacent swing shaft, the top of the compression spring abuts against the horizontal plate, and the bottom of the compression spring abuts against the pressure wheel seat.

[0016] Specifically, the top of the pressure wheel seat has a protrusion, and the protrusion and the compression spring are respectively located on both sides of the corresponding swing axis, and the protrusion is suitable for abutting against the transverse plate to keep the pressure wheel seat tilted.

[0017] The present invention also provides a plate sealing machine, comprising the above-mentioned pressing device.

[0018] The disclosed technical solution has the following advantages:

[0019] 1. In this scheme, needle roller bearings are used in the clamping wheel on the clamping device to replace traditional deep groove ball bearings. Needle roller bearings have a large bearing width, are subjected to line contact, and have a stronger load-bearing capacity. When facing a large reaction force and its eccentric force, they can ensure operational stability and service life, achieve a better plate clamping effect, and thus ensure the quality of edge sealing.

[0020] 2. In this solution, due to the characteristics of the needle bearing installed on the clamping wheel, a smaller outer diameter of the clamping wheel can be obtained, so that the spacing between the clamping wheels can be smaller, and more clamping wheels can be provided for clamping during narrow plate processing; in addition, a smaller spacing between the clamping wheels can allow a larger amount of up and down floating, making the plate more flexible when passing through, and a smaller spring elastic coefficient can ensure that the plate is not easily displaced when passing through, thereby ensuring the quality of edge sealing.

[0021] 3. When the edge banding machine processes narrow plates with short edge feeding, the staggered cycle arrangement of the clamping wheels is adopted, which can withstand greater eccentric load torque. At the same time, more clamping wheels are used to clamp the workpiece, and needle bearings can make the spacing between the clamping wheels smaller, thereby solving the poor processing quality caused by insufficient clamping force during traditional narrow plate processing, solving a major pain point in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the specific embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A three-dimensional schematic diagram of a clamping device according to an embodiment of the present invention;

[0024] Figure 2 A bottom view of the clamping device and the narrow plate and short plate being clamped together according to an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional view of a clamping device according to an embodiment of the present invention;

[0026] Figure 4 A bottom view of the clamping device of the embodiment of the present invention being clamped against the long side of the narrow plate;

[0027] Figure 5 A bottom view of a flat-row pinch wheel and a narrow plate according to an embodiment of the present invention;

[0028] Figure 6 It is a front view of a flat-row pinch wheel and a narrow plate according to an embodiment of the present invention;

[0029] Figure 7 It is a cross-sectional view of a parallel row of pinch wheels and a narrow plate according to an embodiment of the present invention.

[0030] Explanation of the reference numerals: 1. pressure beam; 2. swing shaft; 3. pressure wheel seat; 4. pressure wheel; 11. vertical plate; 12. horizontal plate; 13. belt; 14. compression spring; 31. connecting part; 311. bushing; 32. load-bearing wheel part; 33. pressure wheel shaft; 34. needle bearing; 35. protrusion. DETAILED DESCRIPTION

[0031] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0032] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0033] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0034] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] In view of the problems of the existing edge banding machine when banding narrow plates, such as insufficient clamping force and short life after long-term use, the inventor found that the main reason is the design problem of the elastic pressure wheel. Traditional pressure wheels mostly adopt a deep groove ball bearing parallel design structure. The gap between the pressure wheels is too large, and the plate clamping force is insufficient, which causes the plate to shift or deflect during transportation or edge banding process, making it difficult to ensure the stability of processing. In addition, when the long side of the narrow plate is fed, only a small part of the clamping edge of the narrow plate acts on the pressure wheel. Under the action of eccentric force, the deep groove ball bearing is easily unable to withstand the large eccentric force, and the life after long-term use is difficult to guarantee.

[0037] Therefore, the embodiment of the present invention discloses a clamping device, referring to Figures 1 to 7 , including a pressure beam 1, on which are arranged a plurality of swing shafts 2, both ends of each swing shaft 2 are respectively connected to the corresponding vertical plates 11, the plurality of swing shafts 2 are equally spaced and arranged in a straight line, a pair of pressure wheel seats 3 are arranged on each swing shaft 2, the pressure wheel seats 3 are inclined and have the same inclination direction, a pressure wheel 4 is installed on each pressure wheel seat 3, and a belt 13 is provided at the bottom of the pressure wheel 4. In this scheme, a needle roller bearing 34 is arranged between the pressure wheel 4 and the swing shaft 2. The needle roller bearing 34 has a large bearing width and is subjected to force in a line contact manner, so it has a stronger bearing capacity. When facing a large reaction force and its eccentric force, it can ensure the stability of the plate during the conveying process and the service life of the clamping device, so as to achieve a better plate clamping effect and thus ensure the quality of edge sealing.

[0038] Reference Figure 3 The pressure beam 1 includes vertical plates 11 parallel to each other and a horizontal plate 12 located between the two vertical plates 11. The two vertical plates 11 and the horizontal plate 12 are an integrated structure. A space for accommodating the compression spring 14, the swing shaft 2 and the pressure wheel shaft 33 is formed below the horizontal plate 12 and the two vertical plates 11. Specifically, the plurality of swing shafts 2 are located below the horizontal plate 12, and the straight line in which the plurality of swing shafts 2 are arranged is arranged parallel to the horizontal plate 12.

[0039] The pressure roller seat 3 includes a connecting portion 31 and a wheel bearing portion 32. A bushing 311 is installed between the swing shaft 2 and the connecting portion 31. The bushing 311 is an oil-free bushing 311. The swing shaft 2 passes through the bushing 311 and is installed on the pressure beam 1. The connecting portion 31 is connected to the swing shaft 2 through the bushing 311 and can rotate on the swing shaft 2. A pressure roller shaft 33 is installed on the wheel bearing portion 32. One end of the pressure roller shaft 33 is installed on the wheel bearing portion 32. The other end of the pressure roller shaft 33 is suspended and extends out of the wheel bearing portion 32 and remains parallel to the swing shaft 2. The pressure roller shaft 33 extends outward from the middle of the pressure beam 1, that is, the pressure roller shaft 33 on the same swing shaft 2 extends in the opposite direction. A needle roller bearing 34 is installed on the pressure roller shaft 33, and the pressure wheel 4 is installed on the pressure roller shaft 33 through the needle roller bearing 34.

[0040] There is a compression spring 14 between each pressure wheel seat 3 and the pressure beam 1. The compression spring 14 uses its own elasticity to press the workpiece. Specifically, a slot hole (not shown in the figure) is opened on the pressure wheel seat 3. The slot hole is opened between the connecting part 31 and the wheel-carrying part 32. The bottom end of the compression spring 14 is installed in the slot hole, and the top of the compression spring 14 abuts against the cross plate 12, that is, the compression spring 14 is staggered with the corresponding swing shaft 2.

[0041] The pressing wheel seat 3 is also provided with a protrusion 35, which is extended upward from the connection part 31, and the top of the protrusion 35 abuts on the horizontal plate 12. The protrusion 35 and the compression spring 14 are respectively located at the two ends of the swing shaft 2. Under the elastic force of the compression spring 14, the pressing wheel seat 3 rotates around the swing shaft 2, and the protrusion 35 on the other side abuts on the horizontal plate 12, so that the pressing wheel seat 3 is in an inclined position, that is, the pressing wheel 4 is located obliquely below the corresponding swing shaft 2. Below the pressing wheel 4 is the belt 13. After the pressing wheels 4 on both sides contact the belt 13, they provide a stable and reliable downward pressure on the pressing plate, ensuring the reliability of the plate during the edge sealing process and transportation.

[0042] When a narrow plate passes below, the pressure wheel 4 is lifted upward, the compression spring 14 is further compressed, and the protrusion 35 on the other side of the swing shaft 2 moves downward; when the narrow plate is conveyed past, the pressure wheel seat 3 returns to its original state under the action of the compression spring 14.

[0043] The spacing between adjacent swing shafts 2 is the same, and the connecting parts 31 of a pair of pressure wheel seats 3 on the same swing shaft 2 are all arranged in the same manner, but the wheel bearing parts 32 thereof are arranged in a staggered manner, that is, the partial inclination angles between the wheel bearing parts 32 and the connecting parts 31 are different, so the pressure wheels 4 located on the wheel bearing parts 32 are also arranged in a staggered manner. In addition, in the length direction of the pressure beam 1, the inclination angles of the pressure wheels 4 in the same row are the same. In a preferred example, the staggered spacing of the pressure wheels 4 in the two rows is exactly half of the spacing of the adjacent pressure wheels 4, that is, one of the pressure wheels 4 on the same swing shaft 2 is located below the adjacent swing shaft 2, and the other pressure wheel 4 is located in the middle of the adjacent swing shaft 2.

[0044] Combination Figure 2 As can be seen from the figure, when feeding the long side of the narrow plate, the clamping mechanism can only clamp the short side. At present, the short side of the narrow plate on the market is mainly 40mm. After removing a certain amount of overhang, the clamping wheel 4 of the clamping device can only clamp a small part of the size. At this time, the following will appear: Figure 3 As shown in the reaction force F, when the width of the narrow plate is 40 mm, the edge of the narrow plate does not completely pass over the clamping wheel 4, but is in the clamping wheel 4. During the conveying process, the clamping wheel 4 will be subjected to the reaction force F of the narrow plate while clamping the narrow plate. The reaction force F is an eccentric force for the clamping wheel 4. In the traditional clamping device, the bearings for the rotation of the clamping wheel 4 are mainly deep groove ball bearings, and the reaction force F here will generate an eccentric force on the deep groove ball bearings. The deep groove ball bearings have built-in steel balls and point contact when subjected to force. In addition, the deep groove ball bearings are narrow in width and are easily damaged when subjected to the eccentric force of the reaction force F. It is difficult to withstand large loads and eccentric forces, and the life span is difficult to guarantee after long-term use. The needle bearing 34 of this solution can solve this problem.

[0045] Combination Figure 6 In addition, due to the different structures of deep groove ball bearings and needle roller bearings 34, when the same inner diameter bears the same load, the outer diameter of the deep groove ball bearing is much larger than that of the needle roller bearing 34, which will cause the outer diameter φD of the pressure wheel to be designed larger, so that the spacing W between the pressure wheels 4 will be much larger than that of the needle roller bearing 34. In this way, the design of the needle roller bearing 34 can control the spacing between the rollers to the maximum extent, and a smaller roller spacing W can provide more pressure wheels 4 for compression, achieve greater compression force, ensure better plate compression effect, and thus ensure the quality of edge sealing.

[0046] Reference Figure 4Due to the structure of the clamping device, the outer diameter φD of the clamping wheel 4 is smaller, so the spacing W between the clamping wheels 4 can also be made smaller. When the plate passes under the clamping wheel, the clamping wheel will swing and float up and down to clamp the plate. At this time, the up and down floating amount H can be larger than that of the traditional deep groove ball bearing. If the maximum clamping force is the same, the larger up and down floating amount H can make the plate more flexible when passing, and the smaller spring elastic coefficient can ensure that the plate is not easily displaced when passing.

[0047] Reference Figure 5 and Figure 6 , is a schematic diagram of the parallel row of pressing wheels of the clamping device of the narrow plate edge banding machine. When the narrow plate of the edge banding machine is processed with the short side as the feed, the short side can withstand fewer pressing wheels. The pressing wheels 4 of the clamping device are all parallel row designed, and the minimum number of pressing wheels that can be borne is only 2, and they are in the same straight line, and the eccentric load torque that can be borne is very small.

[0048] Reference Figure 4 , Figure 4 This is a schematic diagram of the staggered pressing wheels of the narrow plate edge banding machine pressing device of the present application. The pressing wheels 4 on the pressing device are staggered, and the width between the pressing wheels 4 is W. After staggering, it is W / 2, which is equivalent to being able to withstand an eccentric load moment of W / 2. In addition, there may be 3 or more pressing wheels in the processing of the plate. The needle bearing 34 results in a smaller pressing wheel spacing W. With the above structural advantages, the pressing force during plate processing can be greatly guaranteed to achieve a better edge banding effect.

[0049] Of course, under the premise that the design of the needle bearing 34 can ensure the pressure, in order to improve the convenience and cost of installation, the present application is not limited to the structure of the staggered arrangement of the clamping wheels 4. Figure 5 , Figure 6 and Figure 7 , also including the structure in which the clamping wheels 4 are arranged in parallel, all are within the protection scope of this solution.

[0050] The present application also provides an edge banding machine for edge banding of wooden boards. An edge banding machine using the pressing device described in the present application is also within the protection scope of the present application.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A clamping device, characterized in that: include: A pressure beam (1) comprises two vertical plates (11) parallel to each other and a horizontal plate (12) located between the two vertical plates (11), a plurality of swing shafts (2) are arranged along the length direction of the vertical plates (11), both ends of each swing shaft (2) are respectively connected to the corresponding vertical plates (11), and the plurality of swing shafts (2) are arranged in a straight line and are all located below the horizontal plate (12); A plurality of pressure wheel seats (3) are correspondingly arranged on each of the swing shafts (2); each of the pressure wheel seats (3) is provided with a clamping wheel (4); and a needle bearing (34) is provided between the clamping wheel (4) and the corresponding pressure wheel seat (3).

2. The pressing device according to claim 1, characterized in that: Two pressing wheel seats (3) are arranged on each of the swing shafts (2); the two pressing wheel seats (3) are arranged side by side; and a clamping wheel (4) is arranged on each of the two pressing wheel seats (3).

3. The pressing device according to claim 2, characterized in that: The pressing wheels (4) on the two pressing wheel seats (3) arranged side by side are arranged in a staggered manner front to back.

4. The pressing device according to claim 2, characterized in that: The pressure wheel seat (3) comprises a connecting portion (31) connected to the swing shaft (2) and a wheel-carrying portion (32) located below the swing shaft (2), wherein the wheel-carrying portion (32) is suitable for mounting the pressure wheel (4).

5. The pressing device according to claim 4, characterized in that: A bushing (311) is provided between the connecting portion (31) and the swing shaft (2).

6. The pressing device according to claim 5, characterized in that: The wheel-carrying portion (32) is provided with a pressure wheel shaft (33), and the pressure wheel (4) is mounted on the pressure wheel shaft (33).

7. The pressing device according to claim 3, characterized in that: The spacing between adjacent swing shafts (2) is equal; one of the clamping wheels (4) of the same swing shaft (2) is located below the adjacent swing shaft (2), and the other clamping wheel (4) is located in the middle of the adjacent swing shaft (2).

8. The pressing device according to claim 1, characterized in that: A compression spring (14) is provided between the pressure wheel seat (3) and the transverse plate (12). The compression spring (14) is staggered with the adjacent swing shaft (2). The top of the compression spring (14) abuts against the transverse plate (12), and the bottom of the compression spring (14) abuts against the pressure wheel seat (3).

9. The pressing device according to claim 8, characterized in that: The top of the pressure wheel seat (3) has a protrusion (35), and the protrusion (35) and the compression spring (14) are respectively located on both sides of the corresponding swing shaft (2), and the protrusion (35) is suitable for abutting against the horizontal plate (12) to keep the pressure wheel seat (3) tilted.

10. An edge banding machine, characterized in that: The invention comprises the clamping device as described in any one of claims 1 to 9.

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