Plate shaping device for office table manufacturing

Abstract

The invention discloses a plate shaping device for office table manufacturing, and relates to the technical field of plate machining equipment. The device comprises a base used for containing a plate, a first mechanism for applying pressure to the upper surface of the middle of the plate is arranged on the base in a matched mode, and second mechanisms for applying pressure to the upper surfaces of the two sides of the plate are further arranged on the two sides of the first mechanism; the first mechanism comprises a counterweight beam A; the second mechanism comprises a counterweight beam B; magnetic cores are arranged in the counterweight beam A and the counterweight beam B; electromagnets are embedded in the base under the counterweight beam A and the counterweight beam B. During use, pressure is applied to a bent plate to enable the plate to be shaped slowly, during use, through arrangement of a balance weight beam A and a balance weight beam B, the plate is shaped according to the requirements during use, and during use, an electromagnet and a magnetic core are arranged, so that the plate is shaped slowly. And the force applied to the plate by the counterweight beam A and the counterweight beam B can be conveniently adjusted according to the thickness and the bending degree of the plate.

Description

Technical Field

[0001] The invention belongs to the technical field of plate processing equipment, and in particular relates to a plate shaping device for manufacturing office desks. Background Art

[0002] There are roughly the following types of furniture boards: 1. Solid wood board, which is a board made of complete wood; 2. Plywood, which is made by steaming and boiling the logs to soften them, then peeling them into thin wood slices along the annual ring direction, adding glue and then using three or more odd-numbered veneers, cross-gluing and hot pressing; 3. Blockboard, which is a core made of natural wood strips in the middle, with very thin veneers on both sides; 4. Density board, which is a man-made board made by processing wood or non-wood plants into fibers (after cutting, soaking, pulping), adding adhesives used, and then subjected to high temperature and high pressure; 5. Particleboard, which is a board made of waste materials from wood felling and processing or shavings from other plants, added with glue or other auxiliary materials and pressed. Some boards will bend to a certain extent after being placed for a long time, exposed to moisture or squeezed during transportation, which will affect their normal use, reduce the flatness of the boards, and cause inaccurate precision, dislocation or jamming during furniture assembly, and affect the aesthetics of the furniture. Therefore, the bent boards need to be leveled and corrected. Summary of the invention

[0003] The object of the present invention is to provide a plate shaping device for manufacturing office desks, which solves the problems raised by the existing background technology by applying pressure on the bent plate to cause the plate to slowly straighten during use.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a plate shaping device for manufacturing office desks, comprising a base for placing the plate, a first mechanism for applying pressure to the upper surface of the middle part of the plate being arranged on the base, and second mechanisms for applying pressure to the upper surfaces of both sides of the plate being arranged on both sides of the first mechanism; the first mechanism comprises two groups of guide columns A arranged on both sides of the base, movable sleeves A being arranged on the guide columns A, and a counterweight beam A being pressed against the upper surface of the plate being connected between the two movable sleeves A; the second mechanism comprises two groups of guide columns B being arranged on both sides of the base, movable sleeves B being arranged on the guide columns B, and a counterweight beam B being pressed against the upper surface of the plate being connected between the two movable sleeves B.

[0006] Furthermore, the weight of the counterweight beam A is greater than the weight of the counterweight beam B; when in use, the counterweight beam A is first controlled to press against the upper surface of the plate; after the plate has completed the initial shaping, the counterweight beam B is controlled to press against the upper surface of the plate until the plate has completed the shaping.

[0007] Furthermore, magnetic cores are provided inside the counterweight beams A and B; electromagnets are embedded in the bases directly below the counterweight beams A and B; after the counterweight beams A and B are respectively assembled to the guide columns A and B, the electromagnets are controlled to be energized, and at this time the electromagnets and the magnetic cores are attracted to each other; when the counterweight beams A and B need to be taken out, the positive and negative poles of the electromagnets are controlled to be switched, and at this time the electromagnets and the magnetic cores repel each other.

[0008] Furthermore, after the plate is shaped by the counterweight beam A and the counterweight beam B, a third mechanism for applying pressure to the upper surface of the plate is placed on the upper surface of the plate; the third mechanism includes a rectangular plate resting against the upper surface of the plate, a first reinforcing rib is arranged on the upper surface of the rectangular plate along its length direction, and a plurality of second reinforcing ribs are arranged on the upper surface of the rectangular plate on both sides of the first reinforcing rib along a direction perpendicular to its length direction; a plurality of counterweight blocks are arranged on the rectangular plate, and an opening is provided on one side of the counterweight block to be clamped on the first reinforcing rib.

[0009] Furthermore, a pair of limiting mechanisms are respectively provided on the upper surfaces of the base at both ends of the plate, with the ends resting on the end surfaces of the plate; the limiting mechanism includes a U-shaped guide plate arranged on the upper surface of the base, and a locking bolt A and a locking bolt B are respectively provided at both ends of the U-shaped guide plate; a fixing rod is provided in the channel formed by the U-shaped guide plate and the upper surface of the base, and the end of the fixing rod is connected to a limiting block resting on the end surface of the plate.

[0010] Furthermore, a rectangular socket is provided on the end face of the fixed rod, a convex ring is provided on the inner wall of the rectangular socket, one side of the convex ring is connected with an insertion rod through a spring A, the end of the insertion rod is connected to one side of a limit block, and an inclined surface is provided on the limit block; the bottom side surface of the rectangular socket is connected with a movable plate sliding along the inner wall of the rectangular socket through a spring B, and a contact sensor is provided on one side of the movable plate; one end of the insertion rod is connected to a top rod passing through the convex ring, and a flexible contact layer is provided at the end of the top rod.

[0011] Furthermore, it also includes a controller, which is connected to the contact sensor; a circuit switch and an adjustable resistor are set on the power supply circuit of the electromagnet; and the controller is connected to the circuit switch and the adjustable resistor.

[0012] Furthermore, limiting rods are respectively arranged on the upper surfaces of the base at both ends of the plate, three T-shaped sliders are arranged on one side of the limiting rods, and sliding grooves cooperating with the T-shaped sliders are respectively arranged on both sides of the upper surface of the base.

[0013] Furthermore, the upper surfaces of the bases at both ends of the limit rod are provided with fixing structures for fixing the limit rod; the fixing structure includes two fixing blocks mateably mounted on the upper surfaces of the bases on both sides of the limit rod, and the fixing blocks are connected with adjusting bolts; the ends of the two adjusting bolts respectively abut against the outer walls of the L-shaped plate A and the L-shaped plate B; the top outer wall of the L-shaped plate A is provided with a guide slope A, and the top inner wall of the L-shaped plate B is provided with a guide slope B that cooperates with the guide slope A; the outer wall of the L-shaped plate B is provided with a positioning sleeve for inserting an adjusting bolt, the inner wall of the L-shaped plate A is provided with a guide slider, and the side wall of the limit rod is provided with a guide groove that cooperates with the guide slider.

[0014] Furthermore, a plurality of rectangular holes for installing a fixing block are arranged at equal intervals on the upper surface of the base along the direction of the vertical limit rod, and a slot is arranged on both sides of the bottom side surface of the rectangular hole; a rectangular block inserted into the rectangular hole is arranged on the bottom side surface of the fixing block, and an insert plate inserted into the slot is arranged on one side of the end of the rectangular block; a threaded hole threadedly connected to the adjusting bolt is arranged on the fixing block.

[0015] The present invention has the following beneficial effects:

[0016] The present invention applies pressure on the bent plate to cause the plate to slowly straighten when in use, and through the setting of counterweight beam A and counterweight beam B, the plate is straightened according to needs when in use, and electromagnets and magnetic cores are set when in use, so that the force applied by counterweight beam A and counterweight beam B to the plate can be adjusted conveniently according to the thickness and bending degree of the plate.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 The structure of the conformal device of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0021] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0022] Figure 4It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the installation structure of the fixing block of the present invention;

[0024] Figure 6 The structure of the conformal device of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] See also Figure 1 As shown, the present invention is a plate shaping device for manufacturing office desks, including a base 1, a first mechanism for applying pressure to the upper surface of the middle part of the plate 100, and a second mechanism for applying pressure to the upper surfaces on both sides of the plate 100; when in use, the plate 100 is placed on the upper surface of the base 1; then the first mechanism is controlled to apply pressure to the upper surface of the plate 100; after the plate 100 completes the initial shaping, the second mechanism is controlled to apply pressure to the upper surface of the plate 100 until the plate 100 completes the shaping.

[0028] In order to facilitate the use of the second institution and the first institution, such as Figure 1 The first mechanism provided by the present invention includes two groups of guide columns A12 arranged on both sides of the base 1, and movable sleeves A121 are arranged on the guide columns A12, and a counterweight beam A122 is connected between the two movable sleeves A121 and is pressed against the upper surface of the plate 100; and the second mechanism includes two groups of guide columns B13 arranged on both sides of the base 1, and movable sleeves B131 are arranged on the guide columns B13, and a counterweight beam B132 is connected between the two movable sleeves B131 and is pressed against the upper surface of the plate 100.

[0029] When in use, the counterweight beam A122 is first controlled to press against the upper surface of the plate 100; after the plate 100 completes the initial shaping, the counterweight beam B132 is controlled to press against the upper surface of the plate 100 until the plate 100 completes the shaping.

[0030] In order to better utilize the cooperation of counterweight beam A122 and counterweight beam B132 to apply pressure on the upper surface of plate 100 to complete the correct shape of the plate, the weight of counterweight beam A122 provided by the present invention is greater than the weight of counterweight beam B132, that is, the pressure applied by counterweight beam A122 on the upper surface of plate 100 is greater than the pressure applied by counterweight beam B132 on the upper surface of plate 100.

[0031] It can be known that when using the plate 100, due to the different materials, thicknesses and bending degrees, when applying pressure for shaping, the applied pressure needs to be adjusted according to needs. In order to facilitate the adjustment, magnetic cores are provided in the counterweight beam A122 and the counterweight beam B132, and electromagnets are embedded in the base 1 located directly below the counterweight beam A122 and the counterweight beam B132; that is, when it is necessary to control the applied pressure for adjustment during use, a circuit switch and an adjustable resistor are set on the power supply circuit of the electromagnet, and then the electromagnet is energized and the resistance value of the adjustable resistor is adjusted according to needs during use, thereby adjusting the force between the electromagnet and the magnetic core.

[0032] That is, when in use, after the counterweight beam A122 and the counterweight beam B132 are respectively assembled to the guide column A12 and the guide column B13, the electromagnet is controlled to be energized, and the electromagnet and the magnetic core are attracted to each other at this time; when the counterweight beam A122 and the counterweight beam B132 need to be taken out, the positive and negative poles of the electromagnet are controlled to be switched, and the electromagnet and the magnetic core repel each other at this time; at this time, the repulsion is used to provide a force to control the counterweight beam A122 and the counterweight beam B132 to move upward, so that the counterweight beam A122 and the counterweight beam B132 can be controlled to move upward while reducing the external force, that is, it is convenient to take out the counterweight beam A122 and the counterweight beam B132 from the guide column A12 and the guide column B13 respectively.

[0033] It should be noted that, in order to limit the plate 100 during use, a pair of limiting mechanisms 3 are respectively provided on the upper surface of the base 1 at both ends of the plate 100, with the ends resting against the end surfaces of the plate 100; Figure 1 and 3-4, the limiting mechanism 3 includes a U-shaped guide plate 30 arranged on the upper surface of the base 1, and locking bolts A31 and locking bolts B32 are respectively arranged at both ends of the U-shaped guide plate 30; a fixing rod 33 is arranged in the channel formed by the U-shaped guide plate 30 and the upper surface of the base 1, and the end of the fixing rod 33 is connected to a limiting block 34 resting on the end surface of the plate 100, and a rectangular plug hole 331 is arranged on the end surface of the fixing rod 33, and a convex ring 332 is arranged on the inner wall of the rectangular plug hole 331, and one side of the convex ring 332 is connected to an insertion rod 342 through a spring A333, and the end of the insertion rod 342 is connected to one side of the limiting block 34, and an inclined surface 341 is arranged on the limiting block 34; the bottom side surface of the rectangular plug hole 331 is connected to a movable plate 336 sliding along the inner wall of the rectangular plug hole 331 through a spring B334, and one side of the movable plate 336 is provided with a contact sensor Sensor 335; one end of the insertion rod 342 is connected to a push rod 343 that passes through the convex ring 332, and a flexible contact layer 344 is arranged at the end of the push rod 343; based on the above arrangement, when in use, the control plate 100 is placed on the upper surface of the base 1, and the two ends of the plate 100 are driven to abut against the limit blocks 34 respectively; then the first mechanism is first used to abut against the upper surface of the plate 100 to control the plate 100 to complete the initial shaping. At this time, the end of the plate 100 abuts against the limit block 34 and drives the insertion rod 342 to move into the rectangular socket 331, that is, at this time, the contact sensor 335 detects a signal, indicating that the plate 100 has completed the initial shaping; then the installation position of the limiting mechanism 3 is adjusted, and the second mechanism is used to abut against the upper surface of the plate 100 to control the plate 100 to complete the shaping, and the contact sensor 335 detects a signal.

[0034] A controller is also included, which is connected to the contact sensor 335, the circuit switch and the adjustable resistor.

[0035] It should be noted that the length of the plate 100 after the initial shaping and the whole shaping is completed is determined according to the curvature of the plate 100, and then the installation position of the limit mechanism 3 is adjusted according to the signal detected by the contact sensor 335 after the initial shaping and the whole shaping is completed.

[0036] At the same time, during use, in order to limit the plate 100 and prevent the plate 100 from tilting to both sides, resulting in the ends of the plate 100 being unable to simultaneously rest against the two limit blocks 34 located at the same end, limit rods 2 are respectively arranged on the upper surface of the base 1 located at both ends of the plate 100, and three T-shaped sliders are arranged on one side of the limit rod 2, and sliding grooves 111 cooperating with the T-shaped sliders are respectively arranged on both sides of the upper surface of the base 1, so that the gap between the two limit rods 2 is adjusted according to the width of the plate 100 during use.

[0037] Specifically, in order to facilitate the adjustment of the gap between the two limit rods 2 according to the width of the plate 100 during use, that is, it is necessary to facilitate the installation and fixation of the limit rod 2 at any position on the upper surface of the base 1 during use, and then the upper surface of the base 1 at both ends of the limit rod 2 is provided with a fixing structure for fixing the limit rod 2; Figure 1 , 2 and 5, the fixing structure includes two fixing blocks 22 which are mounted on the upper surface of the base 1 on both sides of the limiting rod 2, and a plurality of rectangular holes 21 for mounting the fixing blocks 22 are arranged at equal intervals on the upper surface of the base 1 along the direction perpendicular to the limiting rod 2, and a slot 211 is arranged on both sides of the bottom side of the rectangular hole 21; a rectangular block 221 inserted into the rectangular hole 21 is arranged on the bottom side of the fixing block 22, and a plug plate 222 inserted into the slot 211 is arranged on one side of the end of the rectangular block 221; a threaded hole 220 threadedly connected to the adjusting bolt 25 is arranged on the fixing block 22.

[0038] like Figure 1 , 2 , an adjusting bolt 25 is connected to the fixing block 22; the ends of the two adjusting bolts 25 respectively abut against the outer walls of the L-shaped plate A23 and the L-shaped plate B24; a guide slope A231 is provided on the top outer wall of the L-shaped plate A23, and a guide slope B241 matching the guide slope A231 is provided on the top inner wall of the L-shaped plate B24; a positioning sleeve for inserting an adjusting bolt 25 is provided on the outer wall of the L-shaped plate B24, a guide slider is provided on the inner wall of the L-shaped plate A23, and a guide groove matching the guide slider is provided on the side wall of the limit rod 2.

[0039] It is known that if Figure 6 In order to facilitate the shaping of the plate 100 and improve the shaping effect during use, after the shaping of the plate 100 is completed using the counterweight beam A122 and the counterweight beam B132, a third mechanism that applies pressure to the upper surface of the oriented plate 100 is placed on the upper surface of the plate 100; the third mechanism includes a rectangular plate 4 that is against the upper surface of the plate 100, and a first reinforcing rib 42 is arranged on the upper surface of the rectangular plate 4 along its length direction, and a plurality of second reinforcing ribs 43 are arranged on the upper surface of the rectangular plate 4 on both sides of the first reinforcing rib 42 along a direction perpendicular to its length; a plurality of counterweight blocks 44 are arranged on the rectangular plate 4, and an opening that is clamped on the first reinforcing rib 42 is provided on one side of the counterweight block 44.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A board shaping device for office desk manufacturing, characterized in that: The invention comprises a base (1) for placing a plate (100), wherein a first mechanism for applying pressure to the middle upper surface of the plate (100) is arranged on the base (1), and second mechanisms for applying pressure to the upper surfaces of both sides of the plate (100) are arranged on both sides of the first mechanism; The first mechanism comprises two groups of guide columns A (12) arranged on both sides of the base (1), a movable sleeve A (121) being arranged on the guide columns A (12), and a counterweight beam A (122) pressed against the upper surface of the plate (100) being connected between the two movable sleeves A (121); The second mechanism comprises two groups of guide columns B (13) arranged on both sides of the base (1), and movable sleeves B (131) are arranged on the guide columns B (13). A counterweight beam B (132) is connected between the two movable sleeves B (131) and is pressed against the upper surface of the plate (100).

2. A board shaping device for office desk manufacturing according to claim 1, characterized in that: The weight of the counterweight beam A (122) is greater than the weight of the counterweight beam B (132); When in use, the counterweight beam A (122) is first controlled to press against the upper surface of the plate (100); after the plate (100) is initially shaped, the counterweight beam B (132) is then controlled to press against the upper surface of the plate (100) until the plate (100) is shaped.

3. A board shaping device for office desk manufacturing according to claim 1, characterized in that: The counterweight beam A (122) and the counterweight beam B (132) are both provided with magnetic cores; The base (1) located directly below the counterweight beam A (122) and the counterweight beam B (132) is embedded with an electromagnet; After the counterweight beam A (122) and the counterweight beam B (132) are respectively assembled to the guide column A (12) and the guide column B (13), the electromagnet is controlled to be energized, and the electromagnet and the magnetic core are attracted to each other; when the counterweight beam A (122) and the counterweight beam B (132) need to be taken out, the positive and negative poles of the electromagnet are controlled to be switched, and the electromagnet and the magnetic core are repelled to each other.

4. A board shaping device for office desk manufacturing according to claim 3, characterized in that: After the plate (100) is shaped by the counterweight beam A (122) and the counterweight beam B (132), a third mechanism for applying pressure to the upper surface of the oriented plate (100) is placed on the upper surface of the plate (100); The third mechanism comprises a rectangular plate (4) resting against the upper surface of the plate (100), the upper surface of the rectangular plate (4) being provided with a first reinforcing rib (42) along its length direction, and the upper surface of the rectangular plate (4) located on both sides of the first reinforcing rib (42) being provided with a plurality of second reinforcing ribs (43) along a direction perpendicular to its length direction; A plurality of counterweight blocks (44) are arranged on the rectangular plate (4), and one side of the counterweight block (44) is provided with an opening that is clamped on the first reinforcing rib (42).

5. A board shaping device for office desk manufacturing according to claim 4, characterized in that: A pair of limiting mechanisms (3) are respectively provided on the upper surfaces of the bases (1) at both ends of the plate (100), with the ends abutting against the end surfaces of the plate (100); The limiting mechanism (3) comprises a U-shaped guide plate (30) arranged on the upper surface of the base (1), and a locking bolt A (31) and a locking bolt B (32) are respectively arranged at two ends of the U-shaped guide plate (30); A fixing rod (33) is arranged in the channel formed between the U-shaped guide plate (30) and the upper surface of the base (1), and the end of the fixing rod (33) is connected to a limiting block (34) which abuts against the end surface of the plate (100).

6. A board shaping device for office desk manufacturing according to claim 5, characterized in that: A rectangular insertion hole (331) is provided on the end surface of the fixing rod (33), a convex ring (332) is provided on the inner wall of the rectangular insertion hole (331), one side of the convex ring (332) is connected to an insertion rod (342) via a spring A (333), an end of the insertion rod (342) is connected to one side of a limit block (34), and an inclined surface (341) is provided on the limit block (34); The bottom side of the rectangular insertion hole (331) is connected to a movable plate (336) that slides along the inner wall of the rectangular insertion hole (331) via a spring B (334), and a contact sensor (335) is provided on one side of the movable plate (336); One end of the insertion rod (342) is connected to a push rod (343) that passes through the convex ring (332), and a flexible contact layer (344) is provided at the end of the push rod (343).

7. A board shaping device for office desk manufacturing according to claim 6, characterized in that: Also included is a controller connected to the contact sensor (335); A circuit switch and an adjustable resistor are provided on the power supply circuit of the electromagnet; The controller connects the circuit switch and the adjustable resistor.

8. The board shaping device for office desk manufacturing according to claim 4, characterized in that: Limit rods (2) are respectively arranged on the upper surface of the base (1) at both ends of the plate (100), three T-shaped sliding blocks are arranged on one side of the limit rod (2), and sliding grooves (111) cooperating with the T-shaped sliding blocks are respectively arranged on both sides of the upper surface of the base (1).

9. A board shaping device for office desk manufacturing according to claim 8, characterized in that: The upper surface of the base (1) located at both ends of the limiting rod (2) is provided with a fixing structure for fixing the limiting rod (2); The fixing structure comprises two fixing blocks (22) mounted on the upper surface of the base (1) at both sides of the limiting rod (2), and the fixing blocks (22) are connected with adjusting bolts (25); The ends of the two adjusting bolts (25) respectively abut against the outer side walls of the L-shaped plate A (23) and the L-shaped plate B (24); The top outer side wall of the L-shaped plate A (23) is provided with a guide slope A (231), and the top inner side wall of the L-shaped plate B (24) is provided with a guide slope B (241) matching with the guide slope A (231); The outer wall of the L-shaped plate B (24) is provided with a positioning sleeve for inserting an adjusting bolt (25), the inner wall of the L-shaped plate A (23) is provided with a guide slide block, and the side wall of the limiting rod (2) is provided with a guide groove cooperating with the guide slide block.

10. A board shaping device for office desk manufacturing according to claim 9, characterized in that: A plurality of rectangular holes (21) for mounting a fixing block (22) are arranged at equal intervals on the upper surface of the base (1) along a direction perpendicular to the limiting rod (2), and a slot (211) is respectively arranged on both sides of the bottom side of the rectangular hole (21); A rectangular block (221) inserted into the rectangular hole (21) is provided on the bottom side of the fixed block (22), and an inserting plate (222) inserted into the slot (211) is provided on one side of the end of the rectangular block (221); The fixing block (22) is provided with a threaded hole (220) threadedly connected to the adjusting bolt (25).

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