CN214721066U - Turnover saw convenient to overturn - Google Patents

Abstract

The utility model relates to a turnover saw convenient for turnover, which comprises a support piece, a working table plate and a cutting saw; the device is characterized by also comprising a handle, a fixing rod and a lifting mechanism, wherein the handle is provided with the fixing rod which is connected with the working table plate and extends along the rotating axis of the working table plate; the movable frame extends vertically, is arranged on the supporting piece, slides up and down relative to the supporting piece and is at least partially positioned below the fixed rod; the workbench plate is rotatably connected with the position, close to the center, of the top end of the movable frame, can turn over relative to the supporting piece in an upward movement state, and in the turning process, the fixed rod moves back and forth along the top surface of the movable frame, so that the workbench plate is turned over for 180 degrees in a reciprocating mode, and the first table surface and the second table surface of the workbench plate are alternatively in an upward state. The workbench plate can be reliably and repeatedly turned for 180 degrees, and the phenomenon that the workbench plate is turned over too much is prevented.

Description

Turnover saw convenient to overturn

Technical Field

The utility model relates to a saw, concretely relates to upset saw convenient to upset.

Background

The structure of the turnover saw comprises a frame, a bedplate arranged on the frame, two parallel and opposite working tables arranged on the bedplate, wherein the middle part of the bedplate is supported on the frame, the bedplate can turn over 180 degrees back and forth between two positions around a certain axis on the frame, a saw body provided with a saw blade driven by a motor to rotate is pivoted on a rocker arm arranged on the bedplate, a saw blade groove for the saw blade to pass through is arranged on the working bedplate, and the rocker arm can deflect left and right relative to the bedplate, so that the saw body not only can move up and down relative to the rocker arm, but also can deflect left and right relative to the bedplate along with the rocker arm. The turnover saw has two working modes of table cutting and beveling, namely, in the table cutting mode, the machine body is pressed to the bottom, the upper working table surface is parallel to the lower working table surface, the saw teeth penetrate through the saw blade grooves and are exposed on the upper working table surface, a workpiece is placed on the upper working table surface and moves relative to the rotating saw blade, and the saw blade is about to cut open the workpiece; secondly, in a beveling mode, the machine body is lifted and turned for 180 degrees, the workpiece is placed on the lower working table surface, and then the machine body is pressed down, so that the rotating saw blade is vertically or obliquely cut into the workpiece.

For example, the patent number CN200710095839.8 (publication number CN100496836C) of the invention patent "turnover saw" in china discloses a turnover saw, in which a support table (working table plate) of the turnover saw pivots relative to a frame (support) and can rotate 180 degrees, thereby realizing the table cutting and beveling modes. The above patents suffer from the following drawbacks:

1. although the switching between the two modes is realized by directly overturning on the bracket, due to the existence of the saw body and the limited space below the working bedplate, the bedplate can interfere with other positions when overturning;

2. in the working process, waste scraps can be accumulated on the working table plate, and when the working table plate needs to be held to realize turnover in the turnover process, the working table plate is touched to pollute the hands; in addition, the side edge of the workbench plate is held, and the wrist is easily strained in the process of turning 180 degrees from the ergonomic perspective;

3. in the process of rotating the working table plate, the working table plate is easy to rotate by more than 180 degrees, namely the working table plate is easy to rotate over the head.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the current situation of above-mentioned prior art, provide a convenient upset saw of upset that conveniently realizes that the work platen upset and only reciprocal upset 180 are convenient for.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a turnover saw convenient for turnover comprises a support piece;

a worktable plate which is arranged on the supporting part, is provided with a first table top and a second table top which are oppositely arranged, is arranged to rotate relative to the supporting part, and has a rotation axis arranged along the horizontal direction;

the cutting saw is arranged on the first table top of the working table plate;

it is characterized by also comprising

A handle having a fixed rod connected to the work table and extending along a rotation axis of the work table;

the movable frame extends vertically, is arranged on the supporting piece, slides up and down relative to the supporting piece, and is at least partially positioned below the fixed rod;

the workbench plate is rotatably connected with the position, close to the center, of the top end of the movable frame, can turn over relative to the supporting piece in an upward movement state, and in the turning process, the fixed rod moves back and forth above the movable frame, so that the workbench plate is turned over for 180 degrees in a reciprocating mode, and the first table top and the second table top of the workbench plate are alternatively in an upward state.

In order to better support the working table plate when the working table plate is lifted up and down, two movable frames are arranged and are respectively positioned at the left side and the right side of the supporting piece, the positions, close to the center, of the left side and the right side of the working table plate are respectively connected to the movable frames at the corresponding sides in a rotating mode through mounting shafts, the front side and the rear side of the top surface of each movable frame are positioned on the same plane, in the overturning process of the working table plate, the fixed rods move back and forth along the top surface of each movable frame, the fixed rods are positioned at one side of the front side and the rear side of the mounting shafts at the corresponding sides when the first table surface is in an upward state, and the fixed rods are positioned at the other side of the front side and the rear side of the mounting shafts at the corresponding sides when the second table surface is in an upward state. Thus, the worktable plate is turned over by 180 degrees in a reciprocating way.

In order to facilitate holding of the working table plate to achieve overturning of the working table plate, each movable frame corresponds to one handle, and the two handles are arranged on the left side and the right side of the supporting piece respectively.

The mounting shafts can be arranged on the work table plate or the movable frame, but preferably, the mounting shafts are arranged on both the left side and the right side of the work table plate, an extending plate extending upwards is arranged at a position, close to the middle, of the top surface of the movable frame, a mounting hole for the mounting shaft on the corresponding side to be inserted is formed in the extending plate, and the parts, except the extending plate, of the top surface of the movable frame are on the same plane. Thus, the worktable plate is turned over by 180 degrees in a reciprocating way.

The handle has various structural forms, a T-shaped structure may be adopted, or other forms may be adopted, but from the viewpoint of reliability, preferably, the handle includes a longitudinal rod connected to the fixed rod and extending in the front-rear direction, a cross rod connected to the work board and arranged side by side to the fixed rod is provided at a front end of the longitudinal rod, and an escape opening through which the movable frame passes in a state where the work board is turned over is left between a rear end of the longitudinal rod and the work board. The existence of the avoiding port avoids the interference to the movable frame in the overturning process of the working bedplate.

In order to lock the work table in the lowest position state, a locking mechanism for locking the work table on the support or releasing the locking state of the work table in the lowest position state is provided on at least one of the left and right sides of the support, and the locking mechanism includes a locking member for locking the work table on the support, and the work table is slidably provided on the support in the up-down direction in the state where the locking member is released from the locking state of the work table.

The locking member may be in the form of a locking hook, a positioning screw rod, or a latch assembly, but from the viewpoint of facilitating unlocking and locking, preferably, the locking member includes a locking hook rotatably disposed on the support member, the locking hook has a hook portion at a position above a rotation position of the locking hook, the operating platform plate is provided with a notch for engaging with the hook portion of the locking hook, and the locking mechanism further includes a second elastic member acting on the locking hook and always making the hook portion have a tendency to move toward the operating platform plate.

In order to automatically clamp the hook parts of the locking hooks in the corresponding notches when the working bedplate moves downwards, the locking piece comprises two locking hooks which are arranged at intervals along the front and the back, the fixed rod is positioned between the two locking hooks, the whole locking hook is basically in a V shape and comprises a first rod part and a second rod part which are connected, the joint of the first rod part and the second rod part is rotatably connected with the supporting piece through a rotating shaft, the hook parts are arranged at the upper end of the first rod part, the second rod parts of the front locking hook and the back locking hook are connected through a connecting plate, and the connecting plate is positioned below the fixed rod.

In order to provide upward assisting force to the work table when the locking between the work table and the supporting piece is released, the locking device further comprises a first elastic piece which acts on the work table and always enables the work table to have upward movement tendency. In addition, pneumatic and hydraulic cylinders can be used to provide active drive to move the work table upward.

In order to conveniently contain the scraps to achieve the purpose of easy cleaning, the supporting piece is a box body with a cavity inside and an open top, and the working table plate is located at the open top of the box body. Therefore, the scraps cut off can be stored, and the floor is prevented from being polluted.

Compared with the prior art, the utility model has the advantages of: the work table plate of the turnover saw convenient to turn over moves up and down relative to the supporting piece, when the work table plate rises to a height position avoiding a rotation obstacle, an operator holds the handle to rotate the work table plate, and at least part of the movable frame is located below the fixed rod, so that the fixed rod always moves back and forth above the movable frame in the turnover process, the work table plate is reliably turned over for 180 degrees in a reciprocating mode, and then the work table plate is prevented from turning over too much.

Drawings

FIG. 1 is a schematic structural diagram of the bevel mode of the present embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 3 is a schematic diagram of a portion of the structure of FIG. 1;

FIG. 4 is a schematic structural diagram of the present embodiment in the stage cutting mode;

FIG. 5 is a schematic structural view of the FIG. 1 in a state of being turned 180 degrees;

FIG. 6 is a schematic view of a portion of the structure of FIG. 5;

FIG. 7 is a schematic view of a portion of the structure of FIG. 6;

FIG. 8 is a cross-sectional view of FIG. 1;

FIG. 9 is a cross-sectional view of FIG. 4;

FIG. 10 is a schematic view of a portion of the structure of FIG. 5;

FIG. 11 is a schematic diagram of a switch structure;

FIG. 12 is a schematic view of a portion of the structure of FIG. 1;

FIG. 13 is a schematic structural view of the locking mechanism;

fig. 14 is a schematic view of the structure of fig. 13 at another angle.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 14, the turnover saw of the present embodiment includes a supporting 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.

As shown in fig. 1, 2, 4 to 8, the support of this embodiment is a box 1 having a cavity 10 therein and an open top, and the work board 2 is located at the open top of the box 1. The bottom surface of the box 1 is a guide surface 101 inclined downward from the periphery to the center, and a discharge port 1011 is opened at a position near the center of the guide surface 101.

As shown in fig. 1 to 3, the work table 2 has a first table surface 2a and a second table surface 2b which are arranged opposite to each other, and the work table 2 is provided with a through groove 200 which penetrates the first table surface 2a and the second table surface 2 b. The cutting saw 3 is disposed on the first table surface 2a of the table plate 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 disposed on the first table top of the table top 2, the front end of the cutting saw 3 moves up and down relative to the table top 2 under the pressing action of external force, and the saw blade 32 passes through the through slot 200 when the cutting saw 3 is in a downward movement state, as shown in fig. 4 and 5. In addition, be provided with the retaining member of locking slitting saw position on slitting saw 3, the retaining member adopts the optional structure among the prior art, refer to the retaining member in the patent that the background art cites specifically, will not be repeated in detail in this embodiment.

As shown in fig. 6, the lock mechanisms 5 are provided on both the left and right sides of the case 1, and the two lock mechanisms 5 have the same configuration, and the lock mechanism 5 on the left side will be described below as an example. As shown in fig. 3 and 5, the locking mechanism 5 includes a locking member and a second elastic member. The locking piece is used for locking the working table plate 2 on the support member when the working table plate 2 is at the lowest position, the locking piece comprises two locking hooks 51 rotatably arranged on the support member, the two locking hooks 51 are arranged at intervals along the front-back direction, each locking hook 51 is substantially in a V shape in whole and comprises a first rod part 511 and a second rod part 512 which are connected, the connection part of the first rod part 511 and the second rod part 512 is rotatably connected with the box body 1 through a rotating shaft 514, specifically, the outer wall surface of the box body 1 is provided with a mounting seat 13, each rotating shaft corresponds to one mounting seat, and the rotating shaft 514 is rotatably arranged on the corresponding mounting seat 13. The second rods 512 of the two latch hooks 51 are connected by a connecting plate 513. The upper end of the first rod part 511 is provided with a hook part 5110, the top surface of the hook part 5110 is provided with an arc-shaped surface which gradually inclines towards the inside of the box body 1 from top to bottom, the working bedplate 2 is provided with a notch 22 which is clamped with the hook part 5110 of the locking hook 51, and the left side wall surface and the right side wall surface of the working bedplate 2 are provided with inclined surfaces 23 which gradually incline inwards from top to bottom above the notch 22. In order to select the first table top and the second table top of the working table board to be in an upward state, the notches 22 are provided with inclined surfaces 23, thus, each notch 22 is provided with two inclined surfaces 23 correspondingly, the notch 22 is positioned between the two inclined surfaces 23 on the corresponding side, and the inclined surfaces 23 positioned on the notches are gradually inclined towards the interior of the box body 1 from top to bottom.

As shown in fig. 13 and 14, each latch hook 51 has a corresponding second elastic element which acts on the latch hook 51 and always gives the hook 5110 a tendency to move towards the work top 2 and then to snap into the corresponding notch 22 when the work top 2 rests at the top opening of the box 1. Specifically, the second elastic element is a torsion spring 52 mounted on the rotating shaft, a first end of the torsion spring 52 abuts against a surface of the first rod 511 departing from the hook 5110, and a second end of the torsion spring 52 abuts against the mounting seat 13 on the outer wall surface of the box 1 to be in an energy storage state. Thus, when the hook 5110 is in a state of being disengaged from the notch 22 (i.e., when the locking member is unlocked from the work table 2), the work table 2 moves up and down along with the movable frame 4, and the work table 2 can be turned over by 180 ° relative to the box 1 by an external force when the work table 2 is in an upward movement state.

When sliding from top to bottom in order to realize work platen 2, all be provided with adjustable shelf 4 on the two lateral walls of the left and right sides of box 1, so, adjustable shelf 4 has two, and arranges along left and right direction interval. The left and right sides of the work table plate 2 are provided with mounting shafts 21 at positions adjacent to the middle, the left and right sides of the work table plate 2 are rotatably provided on the movable frames 4 at the corresponding sides through the mounting shafts 21 at the corresponding sides, respectively, the mounting shafts 21 extend in the left-right direction and are arranged substantially horizontally, and thus, the rotation axis of the work table plate 2 is arranged in the horizontal direction. The two movable frames 4 have the same configuration, and the movable frame 4 located on the left side will be described below as an example.

As shown in fig. 5, the movable frame 4 extends vertically, and moves upward relative to the box 1 by the first elastic member, and moves downward by the self-gravity of the work table 2 and the pressing-down of an external force. The position near the middle of the left side of the workbench plate 2 is rotatably connected with the upper end of the movable frame 4 through the mounting shaft 21, the front side and the rear side of the top surface of the movable frame 4 at the rotating position of the workbench plate are on the same plane, specifically, as shown in fig. 10, the position near the middle of the top surface of the movable frame 4 is provided with an extending plate 40 extending upwards, the extending plate 40 is provided with a mounting hole 401 for the mounting shaft 21 at the corresponding side to be inserted therein, and the top surface of the movable frame 4 except the extending plate 40 is on the same plane.

In order to provide an upward force assistance to the work top 2 when the work top 2 is in the unlocked state, the first elastic member acts on the work top 2 and always gives the work top 2a tendency to move upward. In this embodiment, as shown in fig. 5 and 7, the movable frame 4 is provided with a connecting rod 41 extending in a vertical direction, as shown in fig. 10, both ends of the connecting rod 41 are provided with guide rods 411 extending in a vertical direction, the outer side surface of the box body 1 is provided with guide grooves 111 extending in the vertical direction at positions corresponding to the guide rods 411, and the guide rods 411 are slidably limited in the guide grooves 111. Each movable frame 4 is provided with two first elastic members, each first elastic member is a vertically arranged spring 42, the periphery of each guide rod 411 is provided with one spring 42, and the lower ends of the two springs 42 are respectively abutted against the bottom surfaces of the guide grooves 111 of the box body 1.

In order to limit the workbench plate 2 to turn 180 degrees in a reciprocating manner and facilitate pulling the workbench plate 2 to move upwards, the left and right side walls of the workbench plate 2 are respectively provided with a handle 6, the two handles 6 are oppositely arranged and have the same structure, and the handle 6 on the left side is taken as an example for explanation. As shown in fig. 2 and 5, the handle 6 has a fixing rod 61 connected to the work table 2 and extending along the axis of rotation of the work table 2, the fixing rod 61 being located above the connecting plate 513 of the locking member. The handle 6 includes a fixing rod 61 between the two locking hooks 51 on the corresponding side and a longitudinal rod 62 connected to the fixing rod 61. The fixed bar 61 extends in the left-right direction, and the movable frame 4 is partially located below the fixed bar 61. The vertical bar 62 extends in the front-rear direction, the front end of the vertical bar 62 has a cross bar 63 connected to the work board 2 and arranged in parallel with the fixed bar 61, and an escape opening 64 through which the movable frame 4 passes in the state where the work board 2 is turned is left between the rear end of the vertical bar 62 and the work board 2. During the turning process of the work bench 2, the fixing rod 61 moves back and forth along the top surface of the movable frame 4 relative to the box body 1, as shown in fig. 2, the fixing rod 61 of the handle 6 is located in front of the mounting shaft 21 on the corresponding side in the upward state of the first table top 2a, as shown in fig. 4, and the fixing rod 61 of the handle 6 is located behind the mounting shaft 21 on the corresponding side in the upward state of the second table top 2 b. In this way, the workbench plate 2 is turned 180 ° back and forth, and the first table top 2a and the second table top 2b of the workbench plate 2 are alternatively in an upward state. As shown in fig. 1 and 2, when the first table top 2a is in an upward state and locked at the open top of the box body 1, the turnover saw is in a beveling mode, i.e. the first table top 2a is a beveling table top; as shown in fig. 4 and 5, the reversible saw is in a table-cutting mode when the second table top 2b is in an upward position and locked at the top opening of the case 1, i.e. the second table top 2b is a table-cutting table top.

As shown in fig. 1, 8 and 9, the switch structure 7 is disposed on the outer wall surface of the box body 1, and includes a switch box 71 disposed on the box body 1, and a cutting control switch 72 and a beveling control switch 73 which are located in the switch box 71 and are electrically connected to the motor 31, the switch box 71 is provided with a cutting control rod 721 disposed corresponding to the cutting control switch 72 and a beveling control rod 731 disposed corresponding to the beveling control switch 73, and the cutting control rod 721 and the beveling control rod 731 are both partially located on the switch box 71.

As shown in fig. 1 and fig. 3 to 5, the first table top 2a is provided with a first avoidance groove 20a, and the second table top 2b is provided with a second avoidance groove 20 b. As shown in fig. 8, when the first table top 2a is in an upward state, the second avoiding groove 20b is arranged corresponding to the cutting control rod 721, and in the beveling mode, the upper end of the cutting control rod 721 is located in the second avoiding groove 20b, at this time, the cutting control switch 72 is in an off state, and the beveling control rod 731 is pressed by the second table top 2b to move downward, so that the beveling control switch 73 and the motor 31 are in a connected state. As shown in fig. 9, when the working platform board 2 is turned to the state that the second table surface 2b is facing upward, the first avoiding groove 20a and the bevel control rod 731 are arranged correspondingly, and in the cutting mode, the upper end of the bevel control rod 731 is located in the first avoiding groove 20a, and the cutting control rod 721 moves downward under the pressing of the first table surface 2a to make the cutting control switch 72 and the motor 31 in the on state. In addition, in the state where the table plate 2 is moved upward, both the table cut control switch 72 and the beveling control switch 73 are out of contact with the table plate 2 and are in the off state.

The orientation of the above embodiment is described with particular reference to the direction of the arrows in figures 2 and 5.

The working process of the turnover saw is as follows:

the beveling mode works: as shown in fig. 1, 2 and 8, the first table top 2a is in an upward state, and the second table top 2b is attached to the top edge of the top opening of the box body 1, the second table top 2b presses down the top surface of the beveling control rod 731, the beveling control switch 73 is switched on, at this time, the beveling main switch (not shown) is pressed down, the motor can be started, and then the dicing saw 3 is pressed down, so that the miter operation can be performed. In this state, the top surface of the table-cutting control rod 721 falls into the second avoiding groove 20b, and the table-cutting control switch 72 remains in the off state without being subjected to an external force.

The bench cutting mode work: as shown in fig. 4, 5 and 9, the dicing saw is locked at a position close to the table board, the saw blade 32 penetrates through the through slot 200, in the table cutting mode, the second table top 2b is in an upward state, the first table top 2a is in a downward state, the first table top 2a is attached to the top edge of the top opening of the box body 1, and the saw blade 32 penetrates through the through slot 200 and is located on the second table top 2 b. The first table top 2a presses down the top surface of the table-cutting control rod 721 to turn on the table-cutting control switch 72, and at this time, presses down the table-cutting main switch (not shown), so that the motor can be started, and then presses down the dicing saw 3, so that the table-cutting work can be performed. In this state, the top surface of the bevel control lever 731 falls into the first avoiding groove 20a, and the bevel control switch 73 remains in the off state without receiving an external force.

The two modes (bevel mode and table cutting mode) are switched, namely, the rotation of the worktable plate 2 is realized:

two hands hold two handles 6 of the working bedplate 2, and the thumb of the two hands simultaneously pokes the connecting plate 513 downwards, at the moment, a hook part 5110 of the lock hook 51 is separated from a gap 22 of the working bedplate 2 to release the locking state of the working bedplate 2 and the box body 1, the movable frame 4 moves upwards under the action of the spring 42, so that the working bedplate 2 is pushed to move upwards to the highest position, and the working bedplate 2 is rotated at the position, so that the working bedplate 2 is turned over by 180 degrees, under the state, the beveling control rod and the table cutting control rod are not stressed, and the beveling control switch and the table cutting control switch are both in an off state; the work bench 2 is pressed downwards, the hook 5110 moves outwards under the action of the inclined surface 23 of the work bench 2 and moves towards the corresponding notch 22 under the action of the torsion spring 52 so as to be limited in the corresponding notch 22, and then the work bench 2 is locked at the top opening of the box body 1.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. A turnover saw convenient for turnover comprises a support piece;

a worktable plate (2) arranged on the support and having a first table top (2a) and a second table top (2b) arranged opposite to each other and arranged to rotate relative to the support with its axis of rotation arranged along a horizontal direction;

a cutting saw (3) arranged on the first table top (2a) of the worktable plate (2);

it is characterized by also comprising

A handle (6) having a fixing rod (61) connected to the work board (2) and extending along the axis of rotation of the work board (2);

the movable frame (4) extends vertically, is arranged on the supporting piece, slides up and down relative to the supporting piece, and is at least partially positioned below the fixed rod (61);

the workbench plate (2) is rotatably connected with the position, close to the center, of the top end of the movable frame (4), can be overturned relative to the supporting piece in an upward movement state, and in the overturning process, the fixed rod (61) moves back and forth above the movable frame (4) so as to enable the workbench plate (2) to be overturned for 180 degrees in a reciprocating mode to enable the first table surface (2a) and the second table surface (2b) to be alternatively in an upward state.

2. The inverted saw of claim 1, wherein: the two movable frames (4) are respectively positioned at the left side and the right side of the supporting piece, the positions, close to the center, of the left side and the right side of the working table plate (2) are respectively connected to the movable frames (4) at the corresponding sides in a rotating mode through the mounting shafts (21), the top surfaces of the movable frames (4) are positioned on the same plane at the front side and the rear side of the mounting shafts (21), in the overturning process of the working table plate (2), the fixed rods (61) move back and forth along the top surfaces of the movable frames (4), when the first table top (2a) is in an upward state, the fixed rods (61) are positioned at one of the front side and the rear side of the mounting shafts (21) at the corresponding sides, and when the second table top (2b) is in an upward state, the fixed rods (61) are positioned at the other of the front side and the rear side of the mounting shafts (21) at the corresponding sides.

3. The inverted saw of claim 2, wherein: every adjustable shelf (4) correspond one handle (6), handle (6) have two, and set up respectively support piece's the left and right sides.

4. The inverted saw of claim 2, wherein: the left side surface and the right side surface of the working table plate (2) are provided with the installation shafts (21), the position, close to the middle, of the top surface of the movable frame (4) is provided with an extending plate extending upwards, the extending plate is provided with an installation hole for the installation shafts (21) on the corresponding side to be inserted into, and the parts, except the extending plate, of the top surface of the movable frame (4) are on the same plane.

5. The inverted saw of claim 2, wherein: the handle (6) comprises a longitudinal rod (62) which is connected with the fixed rod (61) and extends along the front-back direction, the front end of the longitudinal rod (62) is provided with a cross rod (63) which is connected with the working bedplate (2) and arranged side by side with the fixed rod (61), and an avoidance port (64) which is used for the movable frame (4) to pass through when the working bedplate (2) is in a turnover state is reserved between the rear end of the longitudinal rod (62) and the working bedplate (2).

6. The inverted saw of claim 2, wherein: at least one of the left side and the right side of the support is provided with a locking mechanism (5) which is used for locking the work table plate (2) on the support or releasing the locking state of the work table plate (2) when the work table plate (2) is in the lowest position state, the locking mechanism (5) comprises a locking piece used for locking the work table plate (2) on the support, and the work table plate (2) is arranged on the support along with a movable frame (4) in a sliding mode along the up-down direction when the locking piece is in the locking state of releasing the work table plate (2).

7. The inverted saw of claim 6, wherein: the locking piece comprises a locking hook (51) rotatably arranged on the supporting piece, the locking hook (51) is provided with a hook part (5110) at a position above the rotating position of the locking hook, a notch (22) clamped with the hook part (5110) of the locking hook (51) is formed in the working bedplate (2), and the locking mechanism (5) further comprises a second elastic piece which acts on the locking hook (51) and enables the hook part (5110) to have a trend of moving towards the direction of the working bedplate (2).

8. The inverted saw of claim 7, wherein: the locking piece comprises two locking hooks (51) which are arranged at intervals front and back, the fixing rod (61) is positioned between the two locking hooks (51), the locking hooks (51) are basically V-shaped integrally and comprise a first rod part (511) and a second rod part (512) which are connected, the connecting part of the first rod part (511) and the second rod part (512) is rotatably connected with the supporting piece through a rotating shaft (514), the upper end of the first rod part (511) is provided with the hook part (5110), the second rod parts (512) of the front locking hook and the rear locking hook (51) are connected through a connecting plate (513), and the connecting plate (513) is positioned below the fixing rod (61).

9. The inverted saw of any one of claims 1 to 8, wherein: the device also comprises a first elastic piece which acts on the workbench plate (2) and always enables the workbench plate (2) to have upward movement tendency.

10. The inverted saw of claim 1, wherein: the supporting piece is a box body (1) with a cavity (10) inside and an open top, and the working table plate (2) is located at the open top of the box body (1).

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