Vertical panel saw with panel lowering device

Abstract

A vertical panel saw comprises a frame (2), a saw unit (3) movably arranged on the frame (2), and a plurality of panel lowering devices (1, 1', 1"). The panel lowering devices (1, 1', 1") each comprise a height adjustment device with an adjustment drive and a panel holding unit (11, 11', 11") for holding a panel (9), which is height-adjustably arranged on the height adjustment device. The height adjustment device comprises a height-adjustable adjustment carriage, and the panel holding unit (11, 11', 11") comprises a lifting carriage. The panel holding unit (11, 11', 11") is kinematically connected to the adjustment drive by means of a free travel mechanism, which interrupts the kinematic connection between the panel holding unit (11, 11', 11") and the adjustment drive when a panel (9) held by the panel holding unit (11, 11', 11") is placed on a support.

Description

Technical Field

[0001] This invention relates to a vertical panel saw with a panel lowering device. Background Technology

[0002] Vertical panel saws are known in the prior art, comprising a generally generally vertical frame and saw units arranged to move on the frame via saw beams. The board to be sawed, particularly boards made of wood and / or plastic, is placed on the frame and supported at the bottom by support elements, typically in the form of support rollers. Some vertical panel saws have one or more board lowering devices for lifting the board to be sawed or sawn board sections and lowering them onto the support elements. Such board lowering devices include, for example, clamping elements that descend from above onto the board and then clamp the board in a region at its upper edge. The height of the clamping elements is adjusted by means of a height adjustment device and an adjustment actuator.

[0003] To ensure that the plate clamped by the clamping elements can be lowered onto the support elements, or that the clamping elements can be lowered onto the plate to be gripped, without damage due to excessive force, it is necessary to monitor the lowering operation using multiple sensors at different locations, especially if additional support elements can be added at other frame heights. Furthermore, height adjustment requires very precise control. Summary of the Invention

[0004] In view of the shortcomings of vertical panel saws known to date, the problem to be solved by the present invention is to provide a vertical panel saw with an improved panel lowering device that minimizes the risk of damage associated with panel handling and / or reduces the monitoring means necessary to minimize the risk of panel handling.

[0005] The core of this invention lies in a vertical panel saw, comprising a frame, a saw unit movably mounted on the frame, and a panel lowering device. The panel lowering device includes a height adjustment device with an adjustment drive and a panel holding unit for holding the panel, the panel holding unit being height-adjustably arranged on the height adjustment device. The height adjustment device includes a height-adjustable adjustment carriage, and the panel holding unit includes a lifting carriage. The panel holding unit is kinematically connected to the adjustment drive via a free-travel mechanism / freewheel, the free-travel mechanism interrupting the kinematic connection between the panel holding unit and the adjustment drive when the panel held by the panel holding unit is placed on a support.

[0006] The free-travel mechanism prevents excessive reaction forces from acting on the plate holding unit and the height adjustment device with the adjustment actuator when the plate held by the plate holding unit is placed on the support, because the force generated by the adjustment actuator is coupled out. That is, even if the adjustment actuator continues to operate, it will not exert any force on the plate holding unit that would further press the plate against the support, i.e., a force against the support force. This prevents damage due to accumulated force. For this purpose, precise control of the height adjustment (which ensures that the plate held by the plate holding unit is placed on the support with almost no force, and which also requires a suitable monitoring device) is no longer necessary in principle.

[0007] If, in order to grasp the sheet material, the sheet holding unit descends from above onto the sheet material, and the descent operation does not stop in time, then in principle, the free-travel mechanism could also lead to kinematic decoupling between the sheet holding unit and the adjusting actuator, or in other words, a break in the kinematic connection between the sheet holding unit and the adjusting actuator. However, this situation is relatively rare because the sheet holding unit is not typically placed on the sheet material without gaps.

[0008] In a preferred embodiment, the lifting carriage is detachably supported on the adjusting carriage.

[0009] A free-running mechanism can be easily achieved by detachably supporting the lifting carriage of the plate holding unit on the adjusting carriage of the height adjustment device. When the lifting carriage is supported, the raising of the adjusting carriage also raises the lifting carriage, resulting in the rest of the plate holding unit connected thereto also rising. However, if the plate holding unit encounters resistance during the lowering operation with the lifting carriage supported on the adjusting carriage, for example when the plate held by the plate holding unit is placed on the support, or if the plate holding unit descends from above onto the plate and stops too late, the lifting carriage may detach from the adjusting carriage due to the upward force. This results in free-running / idling of the adjusting drive, and the kinematic connection between the plate holding unit and the adjusting drive is interrupted.

[0010] The height adjustment device advantageously includes an adjustment spindle rotatable by an adjustment drive, and the adjustment carriage is arranged on the adjustment spindle and its height can be adjusted by rotation of the adjustment spindle. This adjustment spindle is a simple device for realizing the lowering or raising movement of the adjustment carriage using the adjusting force generated by the adjustment drive.

[0011] Preferably, the height adjustment device includes at least one linear guide rail on which the sheet metal holding unit is linearly guided. As a result, the sheet metal holding unit is held in a position where it can be stably adjusted. The sheet metal holding unit is adjustable, for example, adjustable (e.g., movable) relative to the linear guide rail in only one direction and its opposite direction.

[0012] Advantageously, the plate holding unit has a separation sensor that detects the separation of the lifting carriage from the adjusting carriage. This separation sensor enables a response to the separation of the lifting carriage from the adjusting carriage, and, for example, stops the adjusting drive or even moves the adjusting drive (briefly) in the opposite direction until the adjusting carriage contacts the lifting carriage again, and through the lifting carriage, the plate holding unit is once again supported by the adjusting carriage.

[0013] Advantageously, the plate holding unit is a clamping unit with fixed jaws and movable jaws, between which the plate can be clamped. The movable jaws can be moved toward the fixed jaws by a jaw actuator, preferably a pneumatic jaw actuator, and are preferably linearly guided. Therefore, clamping and securely holding the plate using the plate holding unit can be achieved in a simple manner.

[0014] In an advantageous embodiment, at least one supply line of the sheet metal holding unit is guided from the stationary area of ​​the vertical panel saw to the sheet metal holding unit via two deflecting rollers, one of which is arranged to be movable such that the higher the position of the sheet metal holding unit, the greater the distance between the two deflecting rollers. Preferably, the movably arranged deflecting roller is pre-tensioned in a direction away from the other deflecting roller. The guidance of the supply line of the sheet metal holding unit via two deflecting rollers arranged to be movable relative to each other makes it possible to arrange the at least one supply line in a space-saving manner that is as defined as possible in all adjusted positions of the sheet metal holding unit. The at least one supply line is never simply suspended downwards in a loose and uncertain manner.

[0015] Advantageously, the sheet metal lowering device includes a pulling mechanism, preferably a pulling spring or at least one magnet, which pulls the lifting carriage toward the adjusting carriage. This pulling mechanism is used to pull the lifting carriage toward the adjusting carriage if this is possible, that is, if this is not prevented by the sheet metal holding unit (with or without sheet metal) supported on the support. In this way, the kinematic connection between the sheet metal holding unit and the adjusting actuator is ensured as quickly and effectively as possible.

[0016] Preferably, the vertical panel saw includes two or more, preferably synchronously adjustable, panel lowering devices. Using two or more lowering devices allows for more stable panel holding compared to using only one. Furthermore, it allows for the lifting of heavier loads.

[0017] Advantageously, the vertical panel saw includes a control device for controlling the panel lowering device or two or more panel lowering devices (as the case may be). This control device particularly enables targeted control of multiple panel lowering devices, especially by the operator, but also automatically through a control program. Attached Figure Description

[0018] The vertical panel saw according to the present invention will now be described in more detail with reference to the exemplary embodiments shown in the accompanying drawings, wherein:

[0019] Figure 1 This is a front view of an exemplary embodiment of a vertical panel saw according to the present invention, wherein the panel is held by two panel lowering devices.

[0020] Figure 2 It shows Figure 1 A vertical panel saw, in which another panel is held by three panel lowering devices;

[0021] Figure 3 Viewed from the diagonal front Figure 1 A perspective view of the plate lowering device of a vertical panel saw;

[0022] Figure 4 It's the view from the diagonal front without a front shell. Figure 3 A perspective view of the sheet metal lowering device;

[0023] Figure 5 yes Figure 3 Front view of the sheet metal lowering device;

[0024] Figure 6 It lacks a front housing, but the lifting carriage and adjusting carriage are separate. Figure 5 Front view of the sheet metal lowering device;

[0025] Figure 7 yes Figure 5 A magnified view of detail A;

[0026] Figure 8 yes Figure 6 A magnified view of detail B;

[0027] Figure 9 yes Figure 5 A partial schematic side view of the plate lowering device, wherein the housing portion of the plate holding unit has been omitted;

[0028] Figure 10 yes Figure 5 A partial schematic side view of the plate lowering device, wherein the housing portion of the height adjustment device has been omitted;

[0029] Figure 11 yes Figure 9 A magnified view of detail C;

[0030] Figure 12 It corresponds to Figure 11 A partial schematic side view of the plate lowering device, showing the plate being held and the support for the plate;

[0031] Figure 13 It was viewed from a diagonal rear. Figure 3 A perspective view of the plate lowering device without a rear housing; and

[0032] Figure 14 yes Figure 13 A magnified view of detail D. Detailed Implementation

[0033] The following rules apply to the following description: Where reference numerals are included in the drawings for clarity but are not mentioned in the directly relevant parts of the description, the explanation of those reference numerals in the preceding or following sections of the description shall be consulted. Conversely, to avoid making the drawings overly complex, reference numerals less relevant to immediate understanding are not included in all drawings. In such cases, other drawings shall be consulted. Descriptions of position and orientation, such as above, below, upward, downward, refer to the typical arrangement of the vertical panels saw shown in the drawings.

[0034] Figure 1 An exemplary embodiment of a vertical panels saw according to the present invention is shown, wherein a sheet 9 to be sawed is arranged and held on the vertical panels saw. The vertical panels saw has a frame 2, which includes a plurality of vertical bars 21, a lower crossbar 22, an upper crossbar 23, and a support grid 24 disposed thereon for supporting the rear side of the sheet to be sawed, and a plurality of legs 26. A plurality of support elements in the form of support rollers 25 are distributed along the length of the lower crossbar 22 and protrude from the lower crossbar 22, the support rollers 25 serving as vertical supports for the sheet to be sawed. Figure 1 In the middle, the plate 9 is supported on eight such support rollers 25.

[0035] The vertical panel saw also includes three spaced-apart, identically structured panel lowering devices 1, 1', and 1'", which securely fix, raise, and lower the panel to be sawed. Each of the panel lowering devices 1, 1', and 1'" has a height-adjustable panel holding unit 11, 11', and 11'", which clamps the upper edge of the panel to be sawed from above. Figure 1In this configuration, the plate holding unit 11 of the plate lowering device 1 is located at its upper end position, while the plate holding units 11' and 11" of the plate lowering device 1' and 1" of the plate lowering device 1" grip the plate 9 at its upper end and hold it securely. The plate holding units 11' and 11" have been lowered a short distance from their respective upper end positions.

[0036] For sawing sheet metal, a vertical sheet saw, in a known manner, has a sawing unit 3 arranged on a saw beam 31 so that its height is adjustable, that is, substantially vertically adjustable, and the sawing unit is pivotable between a vertical cutting position where vertical cutting can be performed and a horizontal cutting position where horizontal cutting can be performed. The saw beam 31 is guided on a frame 2 so that it can move in the longitudinal direction of the lower crossbar 22 and the upper crossbar 23, so that horizontal cutting can be performed by the longitudinal or horizontal displacement of the saw beam 31 on which the sawing unit 3 is arranged. Vertical cutting can be performed by adjusting the height of the sawing unit 3 along the saw beam 31.

[0037] Figure 1 The vertical panel saw shown further includes, in a known manner, an extraction device 5 for extracting sawdust and a switch cabinet 6.

[0038] Finally, the vertical panel saw includes a control device 4, specifically for controlling the saw unit 3, the panel lowering devices 1, 1', 1" and the extraction device 5. The control device 4 is arranged on a control beam 41, which is adjustablely guided on the frame 2 along the longitudinal direction of the upper crossbar 23, that is, like the saw beam 31, the control beam can move longitudinally or horizontally.

[0039] Figure 2 It shows the relationship with Figure 1 The same vertical panel saw is used, but here, instead of panel 9, panel 90 is arranged on it. Panel 90 is much longer and narrower than panel 9, and is held by panel holding units 11, 11', 11" of all three panel lowering devices 1, 1', 1" . In the position shown, panel 90 has been lifted away from support roller 25.

[0040] (Representative of plate lowering devices 1, 1', and 1" with the same structure) Figures 3-5 This shows a perspective view of the sheet metal lowering device 1 as viewed from the oblique front. Figure 3 Perspective view from the oblique front without the front housing ( Figure 4 ) and front view ( Figure 5 ). Figure 7 It shows Figure 5 A magnified view of detail A.

[0041] The board lowering device 1 includes a height adjustment device 10 and a board holding unit 11 for holding the board, which is arranged on the height adjustment device 10 in an adjustable manner (that is, substantially vertically adjustable).

[0042] The height adjustment device 10 includes a height-adjustable adjustment carriage 101, which is mounted on an adjustment spindle 104 (rotatably mounted in a lower spindle bearing 1041 and an upper spindle bearing 1042) and its height can be adjusted by rotating the adjustment spindle 104. For this purpose, the adjustment carriage 101 has an internal thread complementary to the external thread of the adjustment spindle 104, thus forming a spindle nut arranged in a drehfest configuration and therefore its height is adjusted as the adjustment spindle 104 rotates. Rotation of the adjustment carriage 101 is prevented by rigidly connecting it to a slide 1011, which is capable of sliding up and down in a substantially vertical direction on a substantially vertically arranged linear guide 102.

[0043] The rotation of the spindle 104 is adjusted by a servo motor-type adjustment driver 105, such as... Figure 10 and Figure 12 As best seen in the diagram, the servo motor drives the toothed belt 1052 via the drive pulley 1051, which in turn drives the output pulley 1053, causing the adjusting spindle 104 to rotate. In other figures, the drive pulley 1051, the toothed belt 1052, and the output pulley 1053 are hidden by housing components or are not visible due to the selected view.

[0044] The plate holding unit 11 includes a lifting carriage 111, which, according to... Figures 3-5 and Figure 7 Under normal circumstances, the lifting carriage 111 and the adjusting carriage 101 are detachably supported on the adjusting carriage 101. The lifting carriage 111 and the adjusting carriage 101 are connected to each other by a pull spring 14, which pulls the lifting carriage 111 toward the adjusting carriage 101. Sliders 1111 and 1112 are respectively provided on the left and right sides of the lifting carriage 111. Slider 1111 can slide up and down on the linear guide rail 102 in a substantially vertical direction. Slider 1112 can slide up and down in a substantially vertical direction on the linear guide rail 103, which is arranged substantially vertically parallel to the linear guide rail 102. Thus, the plate holding unit 11 is linearly guided by the two linear guide rails 102 and 103.

[0045] The lifting carriage 111 carries a clamping unit with a fixed gripper 112 and a movable gripper 113, between which the sheet metal can be clamped. A sheet metal edge sensor 122 for detecting the edge of the sheet metal is provided below the fixed gripper 112. The movable gripper 113 can be moved toward the fixed gripper 112 by a gripper actuator described below. Above the grippers 112, 113, and the gripper actuator, the clamping unit has a cover 116 with an LED display 1161. The LED display 1161 can display the operating status of the sheet metal lowering device 1, such as "lowering," "raising," "movable gripper 113 is adjusting," "lifting carriage 111 is supported on adjusting carriage 101," "lifting carriage 111 is separated from adjusting carriage 101," etc.

[0046] Below the lifting carriage 111 is a tension cylinder housing 117, in particular housing a pneumatic cylinder 118 for adjusting the movable gripper 113, which can... Figure 9 and Figure 11 As seen in [the image], the pneumatic cylinder 118 can be supplied with compressed air and controlled via a pneumatic hose 119, an unlockable check valve 120, and a throttle valve 121, as specifically seen in [the image]. Figure 7 .

[0047] from Figure 3 and Figure 5 As can be clearly seen, the plate lowering device 1 has a rear housing wall 106 and two front housing wall portions 107 and 108. Figure 4 and Figure 6 The image shows a plate lowering device 1 without the two front housing wall portions 107 and 108, where the adjusting spindle 104 and a central support stop 109 for the plate holding unit 11 are visible, the central support stop being mounted on the rear housing wall 106. The central support stop 109 is preferably removable, and in this case, a lower stop 1090 is provided for the plate holding unit 11.

[0048] and Figures 3-5 and Figure 7 compared to, Figure 6 A plate lowering device 1 is shown, having a lifting carriage 111 that is separate from the adjusting carriage 101. Figure 8 It shows Figure 6 A magnified view of detail B.

[0049] from Figures 3-5 and Figure 7 The situation shown begins, in particular, through the following implementation Figure 6 and Figure 8The situation described is as follows: If the plate lowering device 1 encounters resistance during the lowering operation using the lifting carriage 111 supported on the adjusting carriage 101, for example, when the plate held by the plate holding unit 11 is placed on a support (e.g., on the support roller 25), or if the plate holding unit 11 descends onto the plate from above and stops too late, the lifting carriage 111 has already separated from the adjusting carriage 101 due to the upward force, as the adjusting carriage 101 has moved further downward while the lifting carriage 111 remains stationary. Therefore, the kinematic connection between the plate holding unit 11 and the adjusting actuator 105 is interrupted, as the movement of the adjusting carriage 101 is no longer transmitted to the lifting carriage 111. This corresponds to the free travel (Freilauf) of the adjusting actuator 105 relative to the plate holding unit 11.

[0050] Once the adjusting slide 101 moves upward, it contacts the lifting slide 111 again, and the kinematic connection between the adjusting drive 105 and the lifting slide 111 is re-established. In other words, the upward motion generated by the adjusting drive 105 is directly transmitted to the lifting slide 111 via the adjusting slide 101.

[0051] Once the plate, such as plate 9, carried by the plate holding unit 11 has been placed on the support roller 25, it is recommended to briefly raise the adjusting carriage 101 again immediately after placing the plate to obtain the best force distribution, so that the lifting carriage 111 can be supported on the adjusting carriage 101 again.

[0052] exist Figure 6 and Figure 8 In the illustrated case, one end of the pull spring 14 is attached to the underside of the lifting carriage 111, and the other end is attached to the side of the adjusting carriage 101. The pull spring 14 has been stretched and tightened, and pulls the lifting carriage 111 towards the adjusting carriage 101 with greater force. However, as long as the plate 9 held by the plate holding unit 11 is supported on the support roller 25, the irresistible reaction force against the spring force and the weight of the plate holding unit 11 takes effect, and the lifting carriage 111 does not move. The purpose of the pull spring 14 is particularly to move the lifting carriage 111 towards the adjusting carriage 101, especially in the absence of an irresistible reaction force, but where the weight of the plate holding unit 11 may be insufficient to overcome the reaction force (e.g., friction or a power line that pulls the plate holding unit 11 upward). This typically only occurs when the plate holding unit 11 is not holding the plate.

[0053] Instead of adjusting the attraction between the slide 101 and the lifting slide 111 by pulling the spring 14, it can also be generated by one or more magnets.

[0054] Figure 9 , Figure 10 , Figure 12 and Figure 13 The sheet metal lowering device 1 is shown in part as a schematic diagram, in different sectional views from the side, and in a perspective view from the oblique rear. Figure 11 It shows Figure 9 A magnified view of detail C. Figure 14 It shows Figure 13 A magnified view of detail D.

[0055] Figure 12 This illustrates how the sheet 9 is clamped between the fixed jaw 112 and the movable jaw 113 and thus held by the sheet holding unit 11, while being supported on the support roller 25.

[0056] from Figure 9 and Figure 11 As can be seen, the movable gripper 113 is mounted on the tensioning slide 123, which is connected to the tensioning cylinder piston 1180 of the pneumatic cylinder 118 via a tensioning cable 124 guided on a cable pulley 125. A return spring 126 ensures that the tensioning slide 123 with the movable gripper 113 is pre-tensioned in the direction away from the fixed gripper 112. In particular, as shown... Figure 7 As can be seen, the pneumatic cylinder 118 can be supplied with compressed air and controlled via the pneumatic hose 119, the unlockable check valve 120, and the throttle valve 121. Thus, the clamping unit with the fixed jaw 112 and the movable jaw 113 can be adjusted by the pneumatic jaw actuator, which can in turn be controlled by the control device 4.

[0057] The pneumatic hose 119 is the supply line from the stationary area of ​​the vertical panel saw to the sheet holding unit 11. To prevent the hose from sagging loosely and unpredictably in the various adjustment positions of the sheet holding unit 11, the pneumatic hose 119 is guided into the interior of the chain 13 in the stationary upper region of the sheet lowering device 1, specifically referring to… Figure 5 and Figure 7 The chain 13 is guided around two deflecting rollers 131, 132 to a pneumatic cylinder 118 inside the tension cylinder housing 117, see in particular Figures 9-14The chain 13 is schematically shown as a line. With the upper deflecting roller 131 fixedly mounted near the upper end of the plate lowering device 1, the lower deflecting roller 132 is arranged to be movable and suspended. A pivot 1320 of the lower deflecting roller 132 is mounted in a winkelteil 133. The winkelteil 133 is connected to one end of a tension spring 139, the other end of which is connected to a fastening element 138 mounted on the rear housing wall 106. The tension spring 139 pulls the winkelteil 133 downwards, thereby pre-tensioning the movablely arranged lower deflecting roller 132 in a direction away from the upper deflecting roller 131. This results in the plate holding unit 11 being positioned higher, the spacing between the two deflecting rollers 131 and 132 being larger, and the chain 13 always being under some degree of tension; that is, the chain does not simply sag in a loose and indeterminate manner. The arrangement of the chain 13 guided around the two deflecting rollers 131 and 132 also saves relatively much space.

[0058] exist Figure 14 As can be seen, a (preferably inductive) separation sensor 114 is arranged in the lifting carriage 111 of the plate holding unit 11, which detects the separation of the lifting carriage 111 from the adjusting carriage 101. This allows a response to the separation of the lifting carriage 111 from the adjusting carriage 101, and, for example, stops the adjusting drive 105 or even causes the adjusting drive to move briefly in the opposite direction until the adjusting carriage 101 contacts the lifting carriage again, and the plate holding unit 11 is once again supported by the adjusting carriage 101 via the lifting carriage 111.

[0059] In addition, a (preferably inductive) reference sensor 115 is arranged in the stationary upper region of the sheet material lowering device 1, which can be used to determine the position of the sheet material holding unit 11.

Claims

1. A standing panel saw having a frame (2), a saw unit (3) movably arranged on the frame (2), and a panel lowering device (1, 1', 1"), wherein The panel lowering device (1, 1', 1") comprises a height adjustment (10) with an adjustment drive (105) and a panel holding unit (11, 11', 11") for holding a panel (9; 90) arranged height-adjustably on the height adjustment (10), characterized in that the height adjustment (10) comprises a height-adjustable adjustment carriage (101) and the panel holding unit (11, 11', 11") comprises a lifting carriage (111), and the panel holding unit (11, 11', 11") is kinematically connected to the adjustment drive (105) in a free-running manner, which free-running interrupts the kinematic connection between the panel holding unit (11, 11', 11") and the adjustment drive (105) when a panel (9; 90) held by the panel holding unit (11, 11', 11") is placed on a support.

2. Panel saw according to claim 1, characterized in that The lifting carriage (111) is detachably supported on the adjustment carriage (101).

3. Panel saw according to claim 1 or 2, characterized in that The height adjustment (10) comprises an adjustment spindle (104) rotatable by the adjustment drive (105), and the adjustment carriage (101) is arranged on the adjustment spindle (104) and is height-adjustable by the rotation of the adjustment spindle (104).

4. Panel saw according to claim 1, characterized in that The height adjustment (10) comprises at least one linear guide (102, 103) on which the panel holding unit (11, 11', 11") is linearly guided.

5. Panel saw according to claim 2, characterized in that The panel holding unit (11, 11', 11") has a detachment sensor (114) which detects the detachment of the lifting carriage (111) from the adjustment carriage (101).

6. Panel saw according to claim 1, characterized in that The panel holding unit (11, 11', 11") is a clamping unit having a fixed jaw (112) and a movable jaw (113) between which a panel (9; 90) can be clamped, the movable jaw (113) being movable towards the fixed jaw (112) by a jaw drive.

7. Panel saw according to claim 1, characterized in that At least one supply line of the panel holding unit (11, 11', 11") is guided from a stationary area of the vertical panel saw to the panel holding unit (11, 11', 11") via two deflection rollers (131, 132), one of the two deflection rollers (131, 132) being arranged to be movable such that the higher the position of the panel holding unit (11, 11', 11") is, the greater the distance between the two deflection rollers (131, 132) is.

8. Panel saw according to claim 1, characterized in that The panel lowering device (1, 1', 1") comprises a pulling device which pulls the lifting carriage (111) towards the adjustment carriage (101).

9. Panel saw according to claim 1, characterized in that The vertical panel saw comprises two or more panel lowering devices (1, 1', 1"). The vertical panel saw comprises two or more panel lowering devices (1, 1', 1").

10. Panel saw according to claim 1, characterized in that The vertical panel saw comprises a control device (4) for controlling the panel lowering device (1, 1', 1").

11. Panel saw according to claim 6, characterized in that The movable clamping jaw (113) can be moved linearly towards the stationary clamping jaw (112).

12. Panel saw according to claim 6, characterized in that The clamping jaw drive comprises a pneumatic clamping jaw drive.

13. Panel saw according to claim 7, characterized in that The deflecting roller (132) arranged movably is pre-tensioned in a direction away from the other deflecting roller (131).

14. Panel saw according to claim 8, characterized in that The pulling device comprises a pulling spring (14) or at least one magnet.

15. Panel saw according to claim 9, characterized in that The two or more panel lowering devices (1, 1', 1") can be adjusted synchronously.

16. Panel saw according to claim 9, characterized in that The vertical panel saw comprises a control device (4) for controlling the two or more panel lowering devices (1, 1', 1").

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