Pressing wheel set for conveying belt, pressing wheel set positioning tool and edge banding machine

Abstract

The pressing wheel set for the conveying belt comprises an installation frame, a transverse installation shaft and a pressing wheel, a gap is reserved between the pressing wheel and the installation frame, the pressing wheel is provided with a limiting ring, the pressing wheel set comprises a positioning tool, and the thickness of the positioning tool is equal to the gap between the installation frame and the pressing wheel which is installed in place. The pressing wheel set positioning tool comprises a U-shaped positioning tool which can extend into a gap between a mounting frame of a pressing wheel set and a pressing wheel which is mounted in place. The edge banding machine comprises a conveying belt and a conveying chain, a pressing wheel set for the conveying belt is arranged on the back side of the conveying belt, the pressing wheel set for the conveying belt is provided with pressing wheels, and the conveying belt and the conveying chain longitudinally send out workpieces. The edge sealing mechanism is used for sealing the side edge of the workpiece; longitudinal limiting grooves are formed in the back face of the conveying belt, pressing wheels of the pressing wheel set are provided with limiting rings, and the limiting rings are clamped into the longitudinal limiting grooves of the conveying belt to transversely limit the conveying belt. The pinch roller set is the pinch roller set for the conveyor belt.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyor belts, in particular to a pressing wheel set for a conveyor belt, a positioning tool for the pressing wheel set and an edge banding machine. Background Art

[0002] The edge banding machine includes a longitudinal conveyor belt located above, a longitudinal conveyor chain located below, and an edge banding mechanism located on the side. A plurality of pressing wheel sets are installed on the back side of the conveyor belt. Each pressing wheel set includes a mounting frame, a transverse mounting shaft mounted on the mounting frame, and a pair of pressing wheels sleeved on the mounting shaft. The pairs of pressing wheels of the plurality of pressing wheel sets are longitudinally aligned. The workpiece is placed between the conveyor belt and the conveyor chain. The pressing wheels press downwards on the lower part of the conveyor belt to clamp the workpiece between the conveyor belt and the conveyor chain. The conveyor belt and the conveyor chain jointly send the workpiece longitudinally. During this process, the side edge of the workpiece passes through the edge banding mechanism, and the edge banding mechanism seals the side edge of the workpiece. During the transmission of the conveyor belt, there will inevitably be a lateral friction force between the conveyor belt and the pressing wheel or other objects, which is likely to cause the conveyor belt to run laterally, having an adverse effect on the edge banding of the workpiece.

[0003] Some edge banding machines are provided with longitudinal limiting grooves on the back side of the conveyor belt and limiting rings on the outer surface of the pressing wheels of the pressing wheel sets. The limiting rings are snapped down into the limiting grooves. Then, during the transmission of the conveyor belt, the limiting rings of the pressing wheels block the walls of the limiting grooves laterally, thus playing a lateral limiting role on the conveyor belt, and the conveyor belt will not run laterally due to friction with the pressing wheel or other objects. The pressing wheel can perform lateral limiting on conveyor belts of different widths. When the width of the conveyor belt is different, the lateral position of its limiting groove will also be different. Therefore, the lateral position of the pressing wheel during lateral limiting of conveyor belts of different widths is also different. In most cases, there will be a gap between the pressing wheel and the mounting frame. The pressing wheel is prone to wear after long-term use. Maintenance personnel need to timely remove the worn old pressing wheel and replace it with a new pressing wheel. The operation is as follows: Since the pressing wheel and the mounting shaft are installed together by an interference fit, the maintenance personnel first use a tool to strike the old pressing wheel laterally to make the old pressing wheel move laterally away from the mounting frame and close to the end of the mounting shaft until the old pressing wheel disengages from the end of the mounting shaft. Then the maintenance personnel put the new pressing wheel on the end of the mounting shaft and use the tool to strike the new pressing wheel in the opposite direction to make the new pressing wheel move laterally close to the mounting frame until the new pressing wheel is installed in place. When installing the new pressing wheel, the maintenance personnel judge whether the new pressing wheel is installed in place by eyes, which is prone to misjudgment. Once there is a lateral deviation after the new pressing wheel is installed, the limiting ring of the new pressing wheel and the limiting groove of the conveyor belt are not aligned with each other, and the limiting ring cannot be snapped into the limiting groove, so the effect of preventing the conveyor belt from running laterally cannot be achieved. Even more, once the conveyor belt runs laterally and the limiting ring of the new pressing wheel accidentally gets snapped into the limiting groove of the conveyor belt, the limiting ring of the new pressing wheel will instead guide the conveyor belt to maintain the lateral running state, having an adverse effect on the edge banding of the workpiece. Summary of the Utility Model

[0004] The technical problem to be solved by the present utility model is to provide a pressure wheel set for a conveyor belt, which is used to press the conveyor belt so that the conveyor belt is not prone to lateral displacement, and there will be no lateral deviation after the new pressure wheel of the pressure wheel set is installed. The present utility model also provides a positioning tool for the pressure wheel set. Using this positioning tool to position the new pressure wheel of the pressure wheel set, there will be no lateral deviation after the new pressure wheel is installed, and the pressure wheel set can be used to press the conveyor belt so that the conveyor belt is not prone to lateral displacement. The present utility model also provides an edge banding machine. The pressure wheel set for the conveyor belt of this edge banding machine can press the conveyor belt so that the conveyor belt is not prone to lateral displacement, and there will be no lateral deviation after the new pressure wheel of the pressure wheel set is installed.

[0005] To solve the above technical problems, the pressure wheel set for the conveyor belt of the present utility model includes a mounting frame, a lateral mounting shaft mounted on the mounting frame, and a pressure wheel sleeved on the mounting shaft for pushing and pressing a longitudinal conveyor belt. There is a gap between the pressure wheel and the mounting frame. The pressure wheel is provided with a limiting ring to be inserted into the longitudinal limiting groove of the conveyor belt so as to perform lateral limiting on the conveyor belt. It includes a positioning tooling, and the thickness of the positioning tooling is equal to the gap between the mounting frame and the pressure wheel that has been installed in place, and can extend into this gap to position the pressure wheel during installation.

[0006] Furthermore, there are two laterally juxtaposed pressure wheels, and the two pressure wheels are respectively located on both sides of the mounting frame. Correspondingly, there are two positioning toolings, and the two positioning toolings are installed together. The thickness of the first positioning tooling is equal to the gap between the mounting frame and the first pressure wheel that has been installed in place, and can extend into this gap to position the first pressure wheel during installation. The thickness of the second positioning tooling is equal to the gap between the mounting frame and the second pressure wheel that has been installed in place, and can extend into this gap to position the second pressure wheel during installation.

[0007] Furthermore, an annular clamping groove is opened at the end of the mounting shaft, and a snap ring is installed at the clamping groove to block the pressure wheel so that the pressure wheel cannot escape from the end of the mounting shaft.

[0008] Furthermore, there are multiple laterally arranged annular clamping grooves, and the snap ring is installed in one of the clamping grooves.

[0009] The positioning tool for the pressure wheel set of the present utility model includes a "U"-shaped positioning tooling, which can extend into the gap between the mounting frame of the pressure wheel set and the pressure wheel that has been installed in place and sleeved on the outer peripheral side of the mounting shaft of the pressure wheel set to block the pressure wheel during installation to achieve positioning of the pressure wheel.

[0010] Furthermore, it includes a handle; there are two juxtaposed positioning toolings, which are installed on the handle.

[0011] The edge banding machine of the present utility model includes a conveyor belt and a conveyor chain. A set of pressure wheels for the conveyor belt is provided on the back side of the conveyor belt. The set of pressure wheels for the conveyor belt has pressure wheels that push the conveyor belt forward to clamp a workpiece placed between the conveyor belt and the conveyor chain together, and the conveyor belt and the conveyor chain send the workpiece longitudinally out; it further includes an edge banding mechanism for edge banding the side edges of the workpiece; a longitudinal limiting groove is formed on the back of the conveyor belt, and the pressure wheels of the set of pressure wheels are provided with limiting rings, and the limiting rings are snapped into the longitudinal limiting grooves of the conveyor belt to perform lateral limiting on the conveyor belt; the set of pressure wheels is the set of pressure wheels for the conveyor belt as described above.

[0012] Furthermore, there are multiple pressure wheels arranged side by side with a longitudinal interval in the set of pressure wheels.

[0013] Furthermore, the mounting frame is hinged to the frame of the edge banding machine. The edge banding machine includes a pressure belt spring, and the pressure belt spring applies a forward elastic force to the mounting frame of the set of pressure wheels so that the mounting frame drives the pressure wheels to push the conveyor belt forward through the mounting shaft.

[0014] Furthermore, the conveyor belt is above and the conveyor chain is below, and the pressure wheels of the set of pressure wheels push the conveyor belt downward.

[0015] When maintenance personnel need to replace the pressure wheels of the set of pressure wheels: first remove the old pressure wheels and put the new pressure wheels on the ends of the mounting shafts, then insert the positioning tooling between the new pressure wheels and the mounting frame, and use a tool to hit the new pressure wheels to make the new pressure wheels move laterally closer to the mounting frame until the new pressure wheels are tightly attached to the positioning tooling; in this state, since the thickness of the positioning tooling is equal to the gap between the mounting frame and the previously installed old pressure wheels, the gap between the new pressure wheels and the mounting frame is equal to the gap between the old pressure wheels and the mounting frame, and the new pressure wheels are just installed in place, and the newly installed pressure wheels will not have lateral deviation. When maintenance personnel use the new pressure wheels to press the conveyor belt, the limiting rings of the new pressure wheels can be snapped into the limiting grooves on the back of the conveyor belt to perform lateral limiting on the conveyor belt, and the conveyor belt will not run laterally due to friction with the pressure wheels or other objects. After the maintenance personnel install the new pressure wheels, they pull out the positioning tooling, and the positioning tooling will not affect the normal operation of the new pressure wheels. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the edge banding machine, in which the conveyor belt and the conveyor chain clamp the workpiece together.

[0017] Figure 2 It is a schematic diagram of the conveyor belt and the set of pressure wheels.

[0018] Figure 3 It is a schematic diagram of the positioning tool.

[0019] Figure 4 It is a front view of the set of pressure wheels.

[0020] Figure 5 It is a front view of the set of pressure wheels and the positioning tool. In the figure: the convex block of the positioning tool extends between the pressure wheel and the mounting frame, and the left pressure wheel is sleeved on the left end of the mounting shaft.

[0021] Figure 6 It is a front view of the pressing wheel set and the positioning tool. In the figure, the bump of the positioning tool extends between the pressing wheel and the mounting bracket. Specific embodiments

[0022] The following further elaborates on the present invention in detail in conjunction with specific embodiments.

[0023] The edge banding machine is shown in Figure 1 , which includes a conveyor belt 2 at the upper part, a conveyor chain 4 at the lower part, and an edge banding mechanism (not shown in the figure) on the side. It also includes a driving mechanism (not shown in the figure) that drives and connects the conveyor belt 2 and the conveyor chain 4. The edge banding mechanism and the driving mechanism are both prior arts. The conveyor belt 2 and the conveyor chain 4 are both in the front-rear direction. The edge banding machine takes this direction as the longitudinal direction. The edge banding machine is provided with 3 pressing wheel sets 1 for the conveyor belt that are longitudinally spaced and arranged in parallel on the back side of the conveyor belt 2. The 3 pressing wheel sets 1 for the conveyor belt have the same structure. The pressing wheel set 1 is shown in Figure 4 , which includes a mounting bracket 11, a mounting shaft 12 mounted on the mounting bracket 11, and left and right pressing wheels 131, 132 sleeved on the mounting shaft 12. The edge banding machine takes the left-right direction as the transverse direction. The mounting shaft 12 is a transverse mounting shaft. The left and right pressing wheels 131, 132 are arranged transversely in parallel. The mounting bracket 11 is hinged on the edge banding machine frame 101 (see Figure 1 ). The left and right pressing wheels 131, 132 are respectively sleeved on the mounting shaft 12 in an interference fit manner, and are respectively located on both sides of the mounting bracket 11 and there are gaps 133, 134 between them and the mounting bracket 11. The left and right ends 121, 122 of the mounting shaft 12 are respectively provided with multiple annular grooves 120 arranged left and right. The pressing wheel set 1 includes left and right snap rings 123, 124. The left snap ring 123 is installed in an annular groove 120 at the left end 121 of the mounting shaft 12 to block the left pressing wheel 131, and the right snap ring 124 is installed in an annular groove 120 at the right end 122 of the mounting shaft 12 to block the right pressing wheel 132, preventing the left and right pressing wheels 131, 132 from accidentally coming off from the left and right ends 121, 122 of the mounting shaft 12 due to external forces. The 3 pairs of pressing wheels 131, 132 of the 3 pressing wheel sets 1 are longitudinally aligned. Rubber blocks are installed on the outer sides of the chain links of the conveyor chain 4 (see Figure 1 ). See Figure 1 , the edge banding machine is equipped with a pressing belt spring 102 for each pressing wheel set 1. One end of the pressing belt spring 102 is connected to the edge banding machine frame 101 and the other end is connected to the mounting bracket 11 of the pressing wheel set 1, applying a downward and inclined elastic force to the mounting bracket 11 of the pressing wheel set 1. The workpiece 9 is placed between the conveyor belt 2 and the conveyor chain 4. The mounting bracket 11 of the pressing wheel set 1 is under the action of the elastic force of the pressing belt spring 102 and passes through the mounting shaft 12 (see Figure 4)Drive the pressing wheel 13 to push the conveyor belt 2 downward and forward to clamp the workpiece 9 between the conveyor belt 2 and the conveyor chain 4. The driving mechanism drives the conveyor belt 2 and the conveyor chain 4 to longitudinally send the workpiece 9 forward. During this process, the side edge of the workpiece 9 passes through the edge sealing mechanism, and the edge sealing mechanism seals the side edge of the workpiece 9. Since the links of the conveyor chain 4 do not directly contact the workpiece 9 but indirectly contact the workpiece 9 through rubber blocks, it is not easy to damage the surface of the workpiece 9.

[0024] See Figure 2 , there are 4 longitudinal limiting grooves 23 on the back of the conveyor belt 2, and the 4 longitudinal limiting grooves 23 are arranged horizontally in parallel. Each pressing wheel 131, 132 is provided with two limiting rings 130 arranged horizontally in parallel. There are a total of 4 limiting rings 130 for the two pressing wheels 131, 132 of each pressing wheel group 1. The 4 limiting rings 130 are respectively clamped into the 4 longitudinal limiting grooves 23 on the back of the conveyor belt 2 to perform horizontal limiting on the conveyor belt 2, so that the conveyor belt 2 will not run horizontally due to friction with the pressing wheels 131, 132 or other objects. See Figure 2 , Figure 4 , the gaps 133, 134 between the pressing wheels 131, 132 of the pressing wheel group 1 and the mounting frame 11 are 3 mm. The pressing wheel group can be used to perform horizontal limiting on conveyor belts 2 of different widths. When the width of the conveyor belt 2 is different, the horizontal position of its limiting groove 23 will also be different. Therefore, when performing horizontal limiting on conveyor belts 2 of different widths, either the horizontal positions of the pressing wheels 131, 132 need to be adjusted, that is, the gaps 133, 134 between the pressing wheels 131, 132 and the mounting frame 11 need to be adjusted, or pressing wheels 131, 132 of different widths need to be replaced.

[0025] The pressing wheels 131, 132 are prone to wear after long-term use. Maintenance personnel need to timely remove the worn old pressing wheels 131, 132 and replace them with new pressing wheels 131, 132. To facilitate the installation of the new pressing wheels 131, 132, the edge sealer is equipped with multiple positioning tools 14 for the pressing wheel group 1. The positioning tool 14 is shown in Figure 3 , including a handle 140 and two left and right "U"-shaped protrusions 141, 142 installed together. The distance L1 between the two protrusions 141, 142 is equal to the thickness of the mounting frame 11 (see Figure 4 ). The thicknesses of the protrusions 141, 142 of multiple positioning tools 14 are different. For example, the thickness of the protrusions 141, 142 of the first positioning tool 14 is 3 mm, and the thickness of the protrusions 141, 142 of the second positioning tool 14 is 5 mm. See Figure 3 , Figure 4, before the maintenance personnel replace the pressing wheels 131 and 132 of the pressing wheel set 1, they first select a suitable positioning tool 14 according to the gaps 133 and 134 between the pressing wheels 131 and 132 and the mounting bracket 11. The thickness of the left lug 141 of the positioning tool 14 is 3 mm, which is equal to the gap 133 between the left pressing wheel 131 that has been installed in place and the mounting bracket 11, and the thickness of the right lug 142 is 3 mm, which is equal to the gap 134 between the right pressing wheel 132 that has been installed in place and the mounting bracket 11.

[0026] See Figure 4 , taking the replacement of the left pressing wheel 131 alone as an example, the operation of the maintenance personnel is as follows: First, remove the left snap ring 123, and then use a hammer to strike the old pressing wheel 131 to the left so that the old pressing wheel 131 disengages from the left end 121 of the mounting shaft 12 to the left; See Figure 5 , put the new pressing wheel 131 on the left end 121 of the mounting shaft 12, and then hold the handle 140 of the maintenance tool 14, let the left lug 141 of the positioning tool 14 extend into the gap 133 between the new pressing wheel 131 and the mounting bracket 11 and fit over the outer peripheral side of the mounting shaft 12, and use a hammer to strike the new pressing wheel 131 to the right so that the new pressing wheel 131 approaches the mounting bracket 11 to the right until the new pressing wheel 131 abuts against the left lug 141, as shown in Figure 6 ; In this state, since the thickness of the left lug 141 is equal to the gap 133 between the mounting bracket 11 and the old pressing wheel 131 that has been installed in place before, the gap 133 between the new pressing wheel 131 and the mounting bracket 11 is equal to the gap 133 between the old pressing wheel 131 and the mounting bracket 11, and the new pressing wheel 131 is just installed in place. The left lug 141 can be used as a positioning tool for the new pressing wheel 131 to block the new pressing wheel 131 and thus position the new pressing wheel 131. The newly installed pressing wheel 131 will not have a lateral deviation; The maintenance personnel pull out the positioning tool 14 and snap the left snap ring 123 into the original annular slot 120, and the replacement of the left pressing wheel 131 can be completed. See Figure 5 、 Figure 6 , the operation steps for replacing the right pressing wheel 132 alone are the same as those for replacing the left pressing wheel 131 alone, except that the directions are opposite: When the maintenance personnel remove the old right pressing wheel 132, they use a hammer to strike the right pressing wheel 132 to the right, and when installing the new right pressing wheel 132, they use a hammer to strike the right pressing wheel 132 to the left. The right lug 142 of the positioning tool 14 extends into the gap 134 between the new right pressing wheel 132 and the mounting bracket 11 and serves as a positioning tool to position the new right pressing wheel 132. The newly installed right pressing wheel 132 will not have a lateral deviation, which will not be elaborated here. See Figure 2 , since the newly installed pressing wheels 131 and 132 will not have a lateral deviation, when the maintenance personnel use the new pressing wheels 131 and 132 to press the conveyor belt 2, the limiting rings 130 of the new pressing wheels 131 and 132 can be engaged with the limiting grooves 23 on the back of the conveyor belt 2 to play a lateral limiting role on the conveyor belt 2, and the conveyor belt 2 will not run laterally due to friction with the pressing wheel 13 or other objects.

[0027] See Figure 5 and Figure 6 , since the left and right bumps 141, 142 are connected together, when the left bump 141 extends into the gap 133 between the left pressing wheel 131 and the mounting bracket 11, the right bump 142 will also extend into the gap 134 between the right pressing wheel 132 and the mounting bracket 11. If the maintenance personnel need to replace the left and right pressing wheels 131, 132 at the same time, they can first replace the left pressing wheel 131 according to the above operation steps, but the following changes need to be made: after removing the old left pressing wheel 131, before fitting the new left pressing wheel 131, remove the old right pressing wheel 132 first; after fitting the new left pressing wheel 131, instead of pulling out the positioning tool 14, install the new right pressing wheel 132 by the way; pull out the positioning tool 14 only after installing the new right pressing wheel 132, so that the positioning tool 14 does not need to be operated repeatedly, and the operation steps can be simplified.

[0028] See Figure 1 , the conveyor belt 2 and the conveyor chain 4 in this embodiment are both horizontal conveyor belts, and the pressing wheels 131, 132 of the pressing wheel group 1 vertically push the conveyor belt 2 so that the conveyor belt 2 and the conveyor chain 4 vertically clamp the workpiece 9. In other embodiments, the conveyor belt 2 and the conveyor chain 4 can be changed to vertical conveyor belts, and the pressing wheels 131, 132 of the pressing wheel group 1 horizontally push the conveyor belt 2 so that the conveyor belt 2 and the conveyor chain 4 horizontally clamp the workpiece 9.

[0029] As described above, it is only the implementation mode of the present invention, and the scope of patent protection is not limited by this. Those skilled in the art make non-substantive changes or substitutions on the basis of the present invention, and still fall within the scope of patent protection.

Claims

1. A conveyor belt pressure wheel assembly, comprising a mounting frame, a transverse mounting shaft mounted on the mounting frame, and a pressure wheel sleeved on the mounting shaft for pushing the longitudinal conveyor belt, a gap is left between the pressure wheel and the mounting frame, and the pressure wheel is provided with a limiting ring to fit into the longitudinal limiting groove of the conveyor belt to limit the conveyor belt laterally, characterized in that: The positioning tool comprises a positioning tool, the thickness of which is equal to the gap between the mounting frame and the pressing wheel that has been installed in place, and the positioning tool can be extended into the gap to position the pressing wheel being installed.

2. The conveyor belt pressure wheel assembly according to claim 1, characterized in that: There are two pressing wheels arranged horizontally and in parallel, and the two pressing wheels are respectively located on both sides of the mounting frame. Correspondingly, there are two positioning fixtures, and the two positioning fixtures are installed together. The thickness of the first positioning fixture is equal to the gap between the mounting frame and the first pressing wheel that has been installed in place, and the first pressing wheel that is being installed can be positioned by extending into the gap. The thickness of the second positioning fixture is equal to the gap between the mounting frame and the second pressing wheel that has been installed in place, and the second pressing wheel that is being installed can be positioned by extending into the gap.

3. The conveyor belt pressure wheel assembly according to claim 1, characterized in that: An annular clamping groove is provided at the end of the installation shaft, and a clamping spring is installed at the clamping groove to block the pressing wheel so that the pressing wheel cannot escape from the end of the installation shaft.

4. The conveyor belt pressure wheel assembly according to claim 3, characterized in that: The annular groove has a plurality of grooves which are arranged transversely, and the retaining spring is installed in one of the grooves.

5. The pressure wheel group positioning tool is characterized by: It comprises a "U"-shaped positioning tool, which is used to position the pressure wheel in the pressure wheel group for the conveyor belt as described in any one of claims 1 to 4, and can be extended into the gap between the mounting frame of the pressure wheel group and the pressure wheel that has been installed in place, and is sleeved on the outer peripheral side of the mounting shaft of the pressure wheel group to block the pressure wheel being installed to achieve the positioning of the pressure wheel.

6. The pressure wheel assembly positioning tool according to claim 5, characterized in that: It includes a handle; there are two parallel positioning tools installed on the handle.

7. An edge banding machine, comprising a conveyor belt and a conveyor chain, a conveyor belt pressure wheel set is arranged on the back side of the conveyor belt, the conveyor belt pressure wheel set is provided with a pressure wheel that positively pushes the conveyor belt so that the conveyor belt and the conveyor chain jointly clamp the workpiece placed therebetween, and the conveyor belt and the conveyor chain longitudinally deliver the workpiece; it also comprises an edge banding mechanism for banding the side edge of the workpiece; a longitudinal limit groove is opened on the back side of the conveyor belt, and the pressure wheel of the pressure wheel set is provided with a limit ring, which is clamped in the longitudinal limit groove of the conveyor belt to limit the conveyor belt laterally; it is characterized in that: The pressure roller assembly is the pressure roller assembly for a conveyor belt according to any one of claims 1 to 4.

8. The edge banding machine according to claim 7, characterized in that: The pressing wheel group includes a plurality of pressing wheel groups which are spaced apart and arranged in parallel in the longitudinal direction.

9. The edge banding machine according to claim 7, characterized in that: The mounting frame is hinged on the edge banding machine frame. The edge banding machine includes a belt pressing spring. The belt pressing spring applies a positive elastic force to the mounting frame of the pressure wheel group so that the mounting frame drives the pressure wheel to push the conveyor belt positively through the mounting shaft.

10. The edge banding machine according to claim 7, characterized in that: The conveyor belt is located on the upper side and the conveyor chain is located on the lower side, and the pressure wheels of the pressure wheel assembly push the conveyor belt downward.

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