A flip saw

Abstract

The present invention relates to a flip saw, comprising a support member; a work table, which is arranged on the support member and has a through slot; a cutting saw, which is arranged on the table top of the work table and is arranged to move up and down relative to the work table, and has a saw blade that passes through the through slot when the cutting saw is in a downward movement state; it is characterized in that it also includes at least two movable frames, both extending vertically, and arranged on the support member at intervals, and sliding up and down relative to the support member; the work table is rotatably connected to the upper end of the movable frame, and the rotation axis of the work table is arranged in the horizontal direction, and can flip 180° relative to the support member in an upward movement state. The work table is prevented from interfering with the support member when flipping, that is, the flipping of the work table is more reliable.

Description

Technical Field

[0001] The invention relates to a saw, in particular to a flip saw with two working modes of bench cutting and bevel cutting. Background Art

[0002] The structure of the flip saw includes a frame, a table mounted on the frame, two parallel and opposite working surfaces on the table, the middle part of the table supported on the frame, the table can be flipped 180° back and forth between two positions around an axis on the frame, a saw body with a saw blade driven to rotate by a motor is pivotally connected to a rocker arm arranged on the table, a saw blade groove for the saw blade to pass through is opened on the working table, and the rocker arm can deflect left and right relative to the table, so the saw body can not only move up and down relative to the rocker arm, but also can deflect left and right relative to the table together with the rocker arm. The flip saw has two working modes: table cutting and bevel cutting. ① In the table cutting mode, the machine body is pressed down to the bottom, the upper work table is parallel to the lower work table, the saw teeth pass through the saw blade groove and are exposed above the upper work table, the workpiece is placed on the upper work table and moves relative to the rotating saw blade, and the saw blade will cut the workpiece; ② In the bevel cutting mode, the machine body is lifted and flipped 180°, the workpiece is placed on the lower work table, and then the machine body is pressed down, so that the rotating saw blade cuts into the workpiece vertically or obliquely.

[0003] For example, the Chinese invention patent application "A Flip Saw", with the patent application number CN200710069956.7 (application publication number CN101104211A), discloses a flip saw, including a frame, a work table, a support, a rocker arm, a saw body with a saw blade, the lower end of the rocker arm is pivoted on the support through a rotating shaft; the saw body is pivoted on the rocker arm and can rotate around the central axis of the rotating shaft with the rocker arm; a saw blade slot is opened on the work table for the saw blade to pass through, and the corresponding side surface of the lower part of the saw blade slot is an inclined surface, which is parallel to the plane of the saw blade after the saw body is deflected in one direction by a maximum angle, and there is a distance D; the central axis is located within the width L of the saw blade slot, and is located above the working plane of the work table, and is higher than the working plane of the work table by a height H. However, the above patent may have the following defects: since the saw body itself is relatively heavy, it is relatively laborious to lift the table with the saw body when switching between table cutting and bevel cutting.

[0004] Another example is the Chinese invention patent "Flip Saw", with patent number CN200710095839.8 (grant announcement number CN100496836C), which discloses a flip saw, the support table (working table) of which is pivoted relative to the frame (bracket) and can rotate 180 degrees, thereby realizing table cutting and bevel cutting modes. The above patent has the following defects:

[0005] 1. Although the two modes can be switched by directly flipping on the bracket, due to the existence of the saw body and the limited space under the work table, the table may interfere with other positions when it is flipped;

[0006] 2. The sawdust (waste chips) cut from the workpiece falls directly to the ground, making it difficult to clean.

[0007] Therefore, it is necessary to further improve the existing flip saw. Summary of the invention

[0008] The first technical problem to be solved by the present invention is to provide a flip saw with a convenient table flipping in view of the current status of the above-mentioned prior art.

[0009] The second technical problem to be solved by the present invention is to provide a flip saw that is convenient for accommodating waste chips to achieve the purpose of easy cleaning.

[0010] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a flip saw, comprising a support member;

[0011] A workbench plate, arranged on the support member, and having a through groove thereon;

[0012] A cutting saw, disposed on the table top of the work table, arranged to move up and down relative to the work table, and having a saw blade passing through the through slot when the cutting saw is in a downward movement state;

[0013] It is characterized by that it also includes

[0014] At least two movable frames, both extending vertically, arranged on the support member at intervals, and sliding up and down relative to the support member;

[0015] The workbench is rotatably connected to the upper end of the movable frame, and the rotation axis of the workbench is arranged along the horizontal direction, and can be flipped 180 degrees relative to the support member when in an upward movement state.

[0016] In order to lock the work table when it is in the lowest position, a locking mechanism for locking the work table to the support or releasing the locking state of the two is provided on at least one of the left and right sides of the support. The locking mechanism includes a locking member for locking the work table to the support. When the locking member is in the state of releasing the locking of the work table, the work table is slidably arranged on the support along the up and down directions along with the movable frame.

[0017] In order to provide an upward force to the workbench when releasing the lock between the workbench and the support, a first elastic member acting on the workbench and always making the workbench have an upward movement trend is also included. In addition, a pneumatic cylinder or a hydraulic cylinder can also be used to provide an active drive to realize the upward movement of the workbench.

[0018] In order to make the up and down movement of the workbench more stable and reliable, there are two movable frames, which are arranged relatively spaced apart and located on the left and right sides of the support respectively. The workbench is rotatably set on the movable frames on the corresponding sides through mounting shafts at positions near the center on the left and right sides.

[0019] In order to provide upward assistance to the workbench, each movable frame corresponds to at least one first elastic member, which is a vertically arranged spring. The upper end of the spring contacts the movable frame, and the lower end of the spring contacts the support member.

[0020] Preferably, the movable frame is provided with connecting rods extending in a vertical direction thereof, and each of the connecting rods corresponds to two springs, and the two springs are respectively connected to two ends of the connecting rod on the corresponding side.

[0021] In order to provide guidance for the upward and downward extension and contraction of the spring, guide rods extending along the upward and downward directions are provided at both ends of the connecting rod, the spring is at least partially located on the periphery of the guide rod, and a guide groove extending along the upward and downward directions is provided on the outer side surface of the support member at a position corresponding to the guide rod, and the guide rod is slidably limited in the guide groove.

[0022] There are many structural forms of the locking member, which can be in the form of a lock hook, a positioning screw, or a latch assembly. However, from the perspective of convenient unlocking and locking, preferably, the locking member includes a lock hook rotatably arranged on the support member, the lock hook has a hook portion at a position above its rotation point, and a notch is provided on the workbench to engage with the hook portion of the lock hook. The locking mechanism also includes a second elastic member acting on the lock hook and causing the hook portion to always have a tendency to move toward the workbench.

[0023] In order to automatically lock the hook of the lock hook in the corresponding notch when the workbench moves downward, the side wall surface of the workbench has an inclined surface that gradually tilts inward from top to bottom above the notch. In this way, when the workbench moves from top to bottom to the lock hook, the hook of the lock hook first contacts the inclined surface, and when the workbench continues to move downward, the hook of the lock hook moves outward under the action of the inclined surface until the workbench moves to a state where it rests on the support member, and the hook of the lock hook is quickly locked into the notch under the action of the torsion spring, thereby locking the workbench on the support member. During the whole process, there is no need to manually flip the lock hook, and the workbench can be automatically locked, making locking more convenient.

[0024] There are many structural forms of the lock hook, but from the perspective of convenient flipping of the lock hook, preferably, the locking member includes two lock hooks arranged along the front and rear intervals, and the lock hook is basically V-shaped as a whole and includes a first rod portion and a second rod portion connected to each other. The connection between the first rod portion and the second rod portion is rotatably connected to the support member through a rotating shaft, and the upper end of the first rod portion is provided with the hook portion, and the second rod portions of the front and rear two lock hooks are connected by a connecting plate.

[0025] The second elastic member can be in the form of a torsion spring or a spring leaf, but preferably, the second elastic member is a torsion spring installed on the rotating shaft, the first end of the torsion spring contacts the side of the first rod portion facing away from the hook portion, and the second end of the torsion spring contacts the support member.

[0026] The technical solution adopted by the present invention to solve the second technical problem is: the support member is a box body with a cavity inside and an open top, and the workbench is located at the open top of the box body. In this way, the cut waste can be stored to prevent the floor from being dirty.

[0027] In order to facilitate the discharge of the cutting chips in the box, the bottom surface of the box is a guide surface that gradually slopes downward from the periphery to the center, and a discharge port is opened near the center of the guide surface. In this way, the waste chips in the box are guided, and when there are too many waste chips in the box, the discharge port can be opened to quickly discharge the waste chips from the discharge port.

[0028] Compared with the prior art, the advantages of the present invention are: the work table of the flip saw moves up and down relative to the support member, and when the work table rises to a height position avoiding rotation obstacles, the work table is rotated to achieve the flipping of the work table relative to the support member. In this way, the space under the work table is increased to prevent the work table from interfering with the support member when flipping, that is, the flipping of the work table is more reliable. In addition, the presence of the first elastic member allows the work table to move upward automatically when it is in an unlocked state, thereby overcoming the difficulty of manually lifting the work table upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the structure of this embodiment in a bevel cutting mode;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0031] Figure 3 for Figure 1 A schematic diagram of a partial structure of

[0032] Figure 4 This is a schematic diagram of the structure of the present embodiment in the table cutting mode;

[0033] Figure 5 for Figure 1 Schematic diagram of the structure in the state of 180° flip;

[0034] Figure 6 for Figure 5 Schematic diagram of some structures;

[0035] Figure 7 for Figure 6 Schematic diagram of some structures;

[0036] Figure 8 for Figure 1 A cross-sectional view of

[0037] Fig. 9 for Figure 4 A cross-sectional view of

[0038] Fig.10 for Figure 5 Schematic diagram of some structures;

[0039] Fig.11 is a schematic diagram of the structure of the switch;

[0040] Fig.12 for Figure 1 Schematic diagram of some structures;

[0041] Fig.13 is a structural schematic diagram of a locking mechanism;

[0042] Fig.14 for Fig.13 A schematic diagram of the structure from another angle. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below with reference to the accompanying drawings.

[0044] like Figures 1 to 14As shown, the flip saw according to the embodiment of the present invention includes a support member, a work table 2, a cutting saw 3, a movable frame 4, a locking mechanism 5, a first elastic member, a handle 6 and a switch structure 7.

[0045] like Figure 1 , Figure 2 , Figures 4 to 8 As shown, the support member of this embodiment is a box body 1 with a cavity 10 inside and an open top, and the workbench 2 is located at the open top of the box body 1. The bottom surface of the box body 1 is a guide surface 101 that gradually slopes downward from the periphery to the center, and a discharge port 1011 is opened near the center of the guide surface 101.

[0046] like Figures 1 to 3 As shown, the workbench 2 has a first table 2a and a second table 2b arranged opposite to each other, and a through slot 200 penetrating the first table 2a and the second table 2b is provided on the workbench 2. The cutting saw 3 is arranged on the first table 2a of the workbench 2 and includes a motor 31 and a saw blade 32 driven by the motor 31. The rear end of the cutting saw 3 is rotatably arranged on the first table 2 of the workbench 2, and the front end of the cutting saw 3 moves up and down relative to the workbench 2 under the pressing action of an external force, and when the cutting saw 3 is in a downward moving state, its saw blade 32 passes through the through slot 200, see Figure 4 and Figure 5 In addition, the cutting saw 3 is provided with a locking member for locking the position of the cutting saw. The locking member adopts any structure in the prior art. For details, please refer to the locking member in the patent cited in the background technology, which will not be described in detail in this embodiment.

[0047] like Figure 6 As shown, the left and right sides of the box body 1 are both provided with locking mechanisms 5, and the two locking mechanisms 5 have the same structure. The following description will be made by taking the locking mechanism 5 located on the left side as an example. Figure 3 and Figure 5As shown, the locking mechanism 5 includes a locking member and a second elastic member. The locking member is used to lock the workbench 2 on the support member when the workbench 2 is in the lowest position. The aforementioned locking member includes a locking hook 51 rotatably arranged on the support member. There are two locking hooks 51 and they are arranged at intervals along the front-to-back direction. Each locking hook 51 is generally V-shaped as a whole, and includes a first rod portion 511 and a second rod portion 512 connected to each other. The connection between the first rod portion 511 and the second rod portion 512 is rotatably connected to the box body 1 through a rotating shaft 514. Specifically, a mounting seat 13 is arranged on the outer wall surface of the box body 1, and each rotating shaft corresponds to a mounting seat, and the rotating shaft 514 is rotatably arranged on the corresponding mounting seat 13. The second rod portions 512 of the aforementioned two front and rear locking hooks 51 are connected through a connecting plate 513. The upper end of the first rod 511 is provided with a hook 5110, the top surface of the hook 5110 has an arc-shaped surface that gradually tilts toward the inside of the box 1 from top to bottom, and the workbench 2 is provided with a notch 22 that is engaged with the hook 5110 of the lock hook 51, and the left and right side walls of the workbench 2 have inclined surfaces 23 that gradually tilt inward from top to bottom above the notch 22. In order to select one of the first table top and the second table top of the workbench to be in an upward state, the notch 22 has an inclined surface 23 above it, so that each notch 22 corresponds to two inclined surfaces 23, the notch 22 is located between the two inclined surfaces 23 on the corresponding side, and the inclined surfaces 23 located above the notch are gradually tilted toward the inside of the box 1 from top to bottom.

[0048] like Fig.13 and Fig.14 As shown, each lock hook 51 corresponds to a second elastic member, which acts on the lock hook 51 and always makes the hook portion 5110 have a tendency to move toward the workbench 2 and then be stuck in the corresponding notch 22 when the workbench 2 is placed on the top opening of the box body 1. Specifically, the second elastic member is a torsion spring 52 installed on the rotating shaft, the first end of the torsion spring 52 abuts against the side of the first rod portion 511 away from the hook portion 5110, and the second end of the torsion spring 52 abuts against the mounting seat 13 on the outer wall of the box body 1 and is in an energy storage state. In this way, when the hook portion 5110 is in a state of being disengaged from the notch 22 (i.e., the locking member is released from the locking state of the workbench 2), the workbench 2 moves along the up and down direction with the movable frame 4, and the workbench 2 can be flipped 180° relative to the box body 1 under the action of an external force when in an upward movement state.

[0049] In order to realize the up and down sliding of the workbench 2, movable frames 4 are arranged on the left and right outer walls of the box body 1. In this way, there are two movable frames 4, which are arranged at intervals along the left and right directions. Mounting shafts 21 are arranged near the middle of the left and right sides of the workbench 2, and the left and right sides of the workbench 2 are rotatably arranged on the movable frames 4 on the corresponding sides through the corresponding side mounting shafts 21. The mounting shafts 21 extend along the left and right directions and are basically arranged horizontally. In this way, the rotation axis of the workbench 2 is arranged along the horizontal direction. The above two movable frames 4 have the same structure, and the following description takes the movable frame 4 on the left side as an example.

[0050] like Figure 5 As shown, the movable frame 4 extends vertically, and moves upward relative to the box body 1 under the action of the first elastic member, and moves downward under the self-weight of the workbench 2 and the downward pressure of the external force. The left side of the workbench 2 is rotatably connected to the upper end of the movable frame 4 near the middle. Specifically, as shown in FIG. Fig.10 As shown, the top surface of the movable frame 4 has an upwardly extending extension plate 40 near the middle, and the extension plate 40 has a mounting hole 401 for the mounting shaft 21 on the corresponding side to be inserted therein. The top surface of the movable frame 4 except the extension plate 40 is on the same plane.

[0051] In order to provide upward assistance to the workbench 2 when the workbench 2 is in the unlocked state, the first elastic member acts on the workbench 2 and always makes the workbench 2 have an upward movement tendency. Figure 5 and Figure 7 As shown, the movable frame 4 is provided with a connecting rod 41 extending in the vertical direction thereof. Fig.10 As shown, both ends of the connecting rod 41 are provided with guide rods 411 extending in the up-down direction, and the outer side surface of the box body 1 is provided with a guide groove 111 extending in the up-down direction at the position corresponding to the guide rod 411, and the guide rod 411 is slidably limited in the guide groove 111. Each movable frame 4 corresponds to two first elastic members, which are springs 42 arranged vertically. A spring 42 is arranged on the periphery of each guide rod 411, and the lower ends of the two springs 42 are against the bottom surface of the guide groove 111 of the box body 1. A shielding plate 12 covering the spring 42 is arranged on the box body, see Figure 2 shown.

[0052] In order to limit the workbench 2 to flip back and forth 180 degrees and facilitate the workbench 2 to move upward, a handle 6 is provided on both the left and right side walls of the workbench 2. The two handles 6 are arranged opposite to each other and have the same structure. The following description takes the handle 6 on the left side as an example. Figure 2 and Figure 5As shown, the handle 6 has a fixed rod 61 connected to the workbench 2 and extending along the rotation axis of the workbench 2, and the fixed rod 61 is located on the connecting plate 513 of the locking member. The handle 6 includes a fixed rod 61 located between two locking hooks 51 on the corresponding sides and a longitudinal rod 62 connected to the fixed rod 61. The fixed rod 61 extends along the left-right direction, and the above-mentioned movable frame 4 is partially located under the fixed rod 61. The longitudinal rod 62 extends along the front-back direction, and the front end of the longitudinal rod 62 has a cross rod 63 connected to the workbench 2 and arranged side by side with the fixed rod 61, and an escape opening 64 is left between the rear end of the longitudinal rod 62 and the workbench 2 for the movable frame 4 to pass through when the workbench 2 is in a flipped state. During the flipping process of the workbench 2, the fixed rod 61 moves back and forth relative to the box body 1 along the top surface of the movable frame 4, as shown in FIG. Figure 2 As shown, when the first table 2a is facing upward, the fixing rod 61 of the handle 6 is located in front of the mounting shaft 21 on the corresponding side. Figure 4 As shown, when the second table 2b is facing upward, the fixing rod 61 of the handle 6 is located behind the mounting shaft 21 on the corresponding side. In this way, the workbench 2 is reciprocated 180° and then one of the first table 2a and the second table 2b of the workbench 2 is facing upward. Figure 1 and Figure 2 As shown, when the first table top 2a is in an upward state and locked at the top opening of the box body 1, the flip saw is in a bevel cutting mode, that is, the first table top 2a is a bevel cutting table top; Figure 4 and Figure 5 As shown, when the second table top 2b is in an upward state and locked at the top opening of the box body 1, the flip saw is in a table cutting mode, that is, the second table top 2b is a table cutting table top.

[0053] like Figure 1 , Figure 8 and Fig. 9 As shown, the switch structure 7 is arranged on the outer wall surface of the box body 1, and includes a switch box 71 arranged on the box body 1, and a table cutting control switch 72 and a bevel cutting control switch 73 located in the switch box 71 and electrically connected to the motor 31. The switch box 71 is provided with a table cutting control rod 721 arranged corresponding to the table cutting control switch 72 and a bevel cutting control rod 731 arranged corresponding to the bevel cutting control switch 73. The table cutting control rod 721 and the bevel cutting control rod 731 are both partially located on the switch box 71.

[0054] like Figure 1 and Figures 3 to 5 As shown, a first avoidance groove 20a is provided on the first table 2a, and a second avoidance groove 20b is provided on the second table 2b. Figure 8As shown, when the first table 2a is facing upward, the second avoidance groove 20b is arranged corresponding to the table cutting control rod 721, and in the bevel cutting mode, the upper end of the table cutting control rod 721 is located in the second avoidance groove 20b. At this time, the table cutting control switch 72 is in the disconnected state, and the bevel cutting control rod 731 moves downward under the pressure of the second table 2b, so that the bevel cutting control switch 73 and the motor 31 are in the connected state. Fig. 9 As shown, when the work table 2 is flipped over to the state where the second table surface 2b is facing upward, the first avoidance groove 20a is arranged corresponding to the bevel control rod 731, and in the table cutting mode, the upper end of the bevel control rod 731 is located in the first avoidance groove 20a, and the table cutting control rod 721 moves downward under the pressure of the first table surface 2a, so that the table cutting control switch 72 and the motor 31 are in the connected state. In addition, when the work table 2 is in the upward movement state, the table cutting control switch 72 and the bevel cutting control switch 73 are both out of contact with the work table 2 and are in the disconnected state.

[0055] For details of the orientation in the above embodiments, see Figure 2 and Figure 5 The direction indicated by the arrow.

[0056] The working process of the above flip saw is as follows:

[0057] Bevel mode works: Figure 1 , Figure 2 and Figure 8 As shown, the first table 2a is in an upward state, and the second table 2b is in contact with the top edge of the top opening of the box body 1. The second table 2b presses down the top surface of the bevel control rod 731, turning on the bevel control switch 73. At this time, the motor can be started by pressing the bevel main switch (not shown), and the cutting saw 3 can be pressed down to perform the bevel cutting operation. In this state, the top surface of the table cutting control rod 721 falls into the second avoidance groove 20b, without external force, and the table cutting control switch 72 is still in the off state.

[0058] Table cutting mode work: Figure 4 , Figure 5 and Fig. 9 As shown, the cutting saw is locked in a position close to the workbench 2, and the saw blade 32 passes through the through slot 200. In the table cutting mode, the second table 2b is in an upward state, and the first table 2a is in a downward state. The first table 2a is in contact with the top edge of the top opening of the box body 1, and the saw blade 32 passes through the through slot 200 and is located above the second table 2b. The first table 2a presses down the top surface of the table cutting control rod 721, turning on the table cutting control switch 72. At this time, pressing the table cutting main switch (not shown) can start the motor, and then pressing down the cutting saw 3 can perform table cutting. In this state, the top surface of the bevel control rod 731 falls into the first avoidance groove 20a, without external force, and the bevel control switch 73 is still in the off state.

[0059] The conversion between the two modes (bevel cutting mode and table cutting mode) realizes the rotation of the worktable 2:

[0060] The two handles 6 of the workbench 2 are held by both hands, and the thumbs of both hands simultaneously push the connecting plate 513 downwards. At this time, the hook portion 5110 of the locking hook 51 disengages from the notch 22 of the workbench 2 and releases the locking state between the workbench 2 and the box body 1. The movable frame 4 moves upwards under the action of the spring 42, thereby pushing the workbench 2 to move upwards to the highest position, and at this position, the workbench 2 is rotated, so that the workbench 2 is flipped 180°. In this state, the bevel control lever and the table cutting control lever are not subjected to force, and the bevel control switch and the table cutting control switch are both in the off state; the workbench 2 is pressed downwards, and the hook portion 5110 moves outwards under the action of the inclined surface 23 of the workbench 2, and moves into the corresponding notch 22 under the action of the torsion spring 52, thereby being limited in the corresponding notch 22, and then the workbench 2 is locked in the top opening of the box body 1.

[0061] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A flip saw, comprising a support member; A workbench (2) is arranged on the support member and is provided with a through groove (200); a cutting saw (3) disposed on the table top of the workbench (2) and arranged to move up and down relative to the workbench (2), and having a saw blade (32) passing through the through slot (200) when the cutting saw (3) is in a downward moving state; It is characterized in that Also includes At least two movable frames (4), both extending vertically, arranged at intervals on the support member, and sliding up and down relative to the support member; The workbench (2) is rotatably connected to the upper end of the movable frame (4), and the rotation axis of the workbench (2) is arranged in the horizontal direction, and can be turned 180 degrees relative to the support member when in an upward movement state; A locking mechanism (5) is provided on at least one of the left and right sides of the support member for locking the work table (2) on the support member or releasing the locking state of the two when the work table (2) is in the lowest position. The locking mechanism (5) includes a locking member for locking the work table (2) on the support member. When the locking member is in the state of releasing the locking of the work table (2), the work table (2) is slidably arranged on the support member along the up and down directions along with the movable frame (4).

2. The flip saw according to claim 1, characterized in that: It also comprises a first elastic member acting on the workbench (2) and causing the workbench (2) to always have an upward movement tendency.

3. The flip saw according to claim 2, characterized in that: There are two movable frames (4) which are arranged at a relative interval and are respectively located on the left and right sides of the support member. The workbench (2) is rotatably arranged on the movable frames (4) on the corresponding sides at positions adjacent to the center on the left and right sides via mounting shafts (21).

4. The flip saw according to claim 3, characterized in that: Each of the movable frames (4) corresponds to at least one first elastic member, wherein the first elastic member is a spring (42) arranged vertically, wherein the upper end of the spring (42) contacts the movable frame (4), and the lower end of the spring (42) contacts the support member.

5. The flip saw according to claim 4, characterized in that: The movable frame (4) is provided with a connecting rod (41) extending in a vertical direction thereof, each connecting rod (41) corresponds to two springs (42), and the two springs (42) are respectively connected to two ends of the connecting rod (41) on the corresponding side.

6. The flip saw according to claim 5, characterized in that: Both ends of the connecting rod (41) are provided with guide rods (411) extending in the up-down direction, and the outer side surface of the supporting member is provided with a guide groove (111) extending in the up-down direction at a position corresponding to the guide rod (411), and the guide rod (411) is slidably limited in the guide groove (111).

7. The flip saw according to claim 1, characterized in that: The locking member comprises a locking hook (51) rotatably arranged on the supporting member, the locking hook (51) having a hook portion (5110) at a position above the rotation position thereof, the workbench (2) being provided with a notch (22) engaged with the hook portion (5110) of the locking hook (51), and the locking mechanism (5) further comprising a second elastic member acting on the locking hook (51) and causing the hook portion (5110) to always have a tendency to move toward the workbench (2).

8. The flip saw according to claim 7, characterized in that: The side wall surface of the workbench plate (2) has an inclined surface (23) located above the notch (22) and gradually tilts inward from top to bottom.

9. The flip saw according to claim 7, characterized in that: The locking member comprises two locking hooks (51) arranged at intervals along the front and rear, the locking hook (51) is generally V-shaped and comprises a first rod portion (511) and a second rod portion (512) connected to each other, the connection between the first rod portion (511) and the second rod portion (512) is rotatably connected to the supporting member via a rotating shaft, the upper end of the first rod portion (511) is provided with the hook portion (5110), and the second rod portions (512) of the two front and rear locking hooks (51) are connected via a connecting plate (513).

10. The flip saw according to claim 9, characterized in that: The second elastic member is a torsion spring (52) mounted on the rotating shaft, the first end of the torsion spring (52) is in contact with a side of the first rod portion (511) facing away from the hook portion (5110), and the second end of the torsion spring (52) is in contact with the supporting member.

11. The flip saw according to any one of claims 1 to 10, characterized in that: The support member is a box body (1) having a cavity (10) inside and an open top, and the workbench (2) is located at the open top of the box body (1).

12. The flip saw according to claim 11, characterized in that: The bottom surface of the box body (1) is a guide surface (101) which gradually slopes downward from the periphery to the center, and a discharge port (1011) is provided at a position near the center of the guide surface (101).

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