CN112454218A

CN112454218A - Side plug-in components positioner

Info

Publication number: CN112454218A
Application number: CN202011445028.8A
Authority: CN
Inventors: 郑建生; 柏继明
Original assignee: Kunshan Wisdom Electronics Co ltd
Current assignee: Kunshan Wisdom Electronics Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-03-09

Abstract

The invention belongs to the technical field of automatic machinery, and discloses a side plug-in positioning device, which comprises: the jig table is used for placing the side plug-in, and the edge of the jig table is provided with a retaining wall higher than the surface of the jig table; the pushing mechanism is arranged on one side of the jig table and can move towards the jig table and push the side plug-in unit to a longitudinal positioning point along the longitudinal direction; and the fine adjustment mechanism is arranged on one side of the jig table, which is away from the pushing mechanism, and can limit the side plug-in unit along the transverse direction and limit the side plug-in unit at the transverse positioning point. Has the advantages that: the jig platform can receive the side plug-in components, the stop wall limits the moving range of the side plug-in components, the pushing mechanism can push the side plug-in components to the longitudinal positioning points, then the fine adjustment mechanism can enable the side plug-in components to be limited at the transverse positioning points, the side plug-in components are positioned, and manual operation is not needed in the positioning process.

Description

Side plug-in components positioner

Technical Field

The invention relates to the technical field of automatic machinery, in particular to a side plug-in positioning device.

Background

In the process of producing the side plug-in unit, the side plug-in unit is often required to be positioned, and only the side plug-in unit positioned at a fixed preset position can meet the accuracy in the subsequent process. In the prior art, manual positioning is often adopted for positioning the side plug-in, so that errors are easily caused, extra time is consumed for alignment in the subsequent process, and difficulty is brought to continuous automatic production.

Disclosure of Invention

The invention aims to provide a side plug-in positioning device, which aims to solve the problems that the existing positioning method is easy to generate errors due to manual operation and is not suitable for automatic production.

In order to achieve the purpose, the invention adopts the following technical scheme:

a side insert positioning device comprising:

the jig table is used for placing the side plug-in, and the edge of the jig table is provided with a retaining wall higher than the surface of the jig table;

the pushing mechanism is arranged on one side of the jig table and can move towards the jig table and push the side plug-in unit to a longitudinal positioning point along the longitudinal direction; and

and the fine adjustment mechanism is arranged on one side of the jig table, which deviates from the pushing mechanism, and can limit the side plug-in unit along the transverse direction and limit the side plug-in unit at a transverse positioning point.

As a preferable scheme of the side plug-in positioning device, the jig table comprises two jig table monomers which are arranged oppositely, the two jig table monomers are arranged oppositely along the transverse direction, the blocking wall is arranged around the periphery of the jig table monomers, and an opening is formed between the two blocking walls;

the pushing mechanism is opposite to the opening along the longitudinal direction.

The two jig table single bodies support the two transverse ends of the side plug-in units respectively, the blocking walls are formed on the peripheries of the jig table single bodies and form openings, and the pushing mechanisms can stretch into the openings and push the side plug-in units.

As a preferable scheme of the side insert positioning device, the jig table unit is provided with a groove at one side close to the pushing mechanism, the pushing mechanism is provided with a pushing limb, and the pushing limb can move into the groove along the longitudinal direction.

The groove is inward relative to the blocking wall, and a certain pushing distance can be reserved for the pushing limb.

As a preferred embodiment of the above side insert positioning device, the pushing mechanism is provided with two pushing limbs, and the pushing limbs correspond to the jig table units one to one.

The pushing limbs correspond to the two ends of the side plug-in unit, so that the side plug-in unit moves more stably.

As a preferable embodiment of the above side insert positioning device, the jig table further includes a base station located between the two jig table units, and the pushing limb can make the side insert reach the longitudinal positioning point when longitudinally abutting against the base station.

When the pushing limb abuts against the base platform, the side plug-in is limited to stay at the longitudinal positioning point, and the side plug-in is prevented from directly impacting the blocking wall along the longitudinal direction to deform.

As a preferable embodiment of the above side card positioning device, the pushing limb includes a limb top end and a limb tail end, the limb top end is located at one side of the limb tail end close to the jig table in the longitudinal direction, the limb top end is located above the base table and does not interfere with the base table, and the limb tail end can abut against the base table.

The limb top can contact side plug-in components earlier, after promoting a limb along longitudinal movement a distance, limb tail end butt base station, and then the restriction side plug-in components stops at longitudinal positioning point.

As a preferable scheme of the side plug-in positioning device, a connecting limb is arranged between the two pushing limbs;

the pushing mechanism further comprises an air cylinder, and the output end of the air cylinder is connected with the connecting limb.

The connecting limbs are arranged between the two pushing limbs to form a whole, and the air cylinder can drive the two pushing limbs simultaneously after applying thrust, so that the pushing mechanism operates more stably.

As a preferable scheme of the side insert positioning device, the blocking wall is provided with a notch at a right-angle vertex, and the notch is provided with the fine adjustment mechanism;

the fine adjustment mechanism comprises an adjustment seat and a bearing, the adjustment seat is transversely arranged on the outer side of the notch, and the bearing is connected to the adjustment seat and can limit the side plug-in unit at a transverse positioning point.

When the pushing mechanism pushes the side plug-in to the tail end of the longitudinal stroke, the fine adjustment mechanism is arranged at the two notch positions, the bearing can be in sliding contact with the side plug-in, and finally the side plug-in is limited at the transverse positioning point.

As a preferable scheme of the side card positioning device, the bearing on the first fine adjustment mechanism of the two fine adjustment mechanisms is elastically connected to the adjustment seat and always receives an elastic force moving towards the other fine adjustment mechanism;

and a bearing on the second fine adjustment mechanism of the two fine adjustment mechanisms is fixedly connected to any position on the adjusting seat.

The bearing of one of them fine-tuning can take place lateral displacement after the atress, and the bearing of another fine-tuning is fixed, blocks the bearing easily when preventing to place side plug-in components because initial position skew is too big longitudinal movement, and the bearing through elastic connection still can keep at horizontal setpoint after restoring to the throne, and the bearing of another fine-tuning can be fixed in arbitrary position of adjusting the seat and then can adapt to the side plug-in components of different grade type.

As a preferred embodiment of the side card positioning device, the first adjusting seat of the first fine adjustment mechanism is provided with a spring, a first adjusting rod and an electric push rod, two ends of the spring are respectively connected with the inner wall of the first adjusting seat and the first adjusting rod, the electric push rod is located at one side of the spring and selectively connected with the first adjusting rod, and the electric push rod and the spring are not on the same horizontal plane;

the second fine adjustment mechanism is characterized in that a second adjustment seat of the second fine adjustment mechanism is provided with a plurality of first limiting teeth along the length direction of the second adjustment seat, a second adjustment rod is arranged on the second adjustment seat, and the second adjustment rod is provided with second limiting teeth which are connected with the first limiting teeth in a clamping mode along the vertical direction.

The invention has the beneficial effects that: the jig platform can receive the side plug-in components, the stop wall limits the moving range of the side plug-in components, the pushing mechanism can push the side plug-in components to the longitudinal positioning points, then the fine adjustment mechanism can enable the side plug-in components to be limited at the transverse positioning points, the side plug-in components are positioned, and manual operation is not needed in the positioning process.

Drawings

FIG. 1 is a schematic structural view of a side card positioning device according to an embodiment of the present application;

FIG. 2 is a schematic view of a portion of a side card positioning device according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a pushing mechanism according to an embodiment of the present application;

FIG. 4 is a schematic view of a part of a jig stage according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram illustrating a first perspective of a first fine adjustment mechanism according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating a second perspective of the first fine adjustment mechanism according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second fine adjustment mechanism according to an embodiment of the present application.

1-a jig table; 10-a jig table single body; 11-a retaining wall; 12-a base station; 100-opening; 101-a groove; 110-notch;

2-a pushing mechanism; 20-a cylinder; 21-pushing limb; 22-connecting limb; 211-limb apex; 212-caudal end of limb;

3-fine adjustment mechanism; 31-an adjusting seat; 32-a bearing; 3A-a first fine-tuning mechanism; 3B-a second fine-tuning mechanism; 31A-a first adjustment seat; 31B-spring; 31C-first adjustment lever; 31D-electric push rod; 31E-output rod; 31F-a second adjustment seat; 31G-second adjustment lever; 31H-a first limit tooth; 31I-second limit tooth.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The invention provides a side plug-in positioning device which is used for positioning a side plug-in.

Fig. 1 is a schematic structural diagram of a side card positioning device according to an embodiment of the present application, where the side card positioning device includes a jig table 1, a pushing mechanism 2, and a fine adjustment mechanism 3. As shown in fig. 1, the side card positioning device includes three sets of jig tables 1, a pushing mechanism 2 and a fine adjustment mechanism 3, i.e. three side cards can be positioned at the same time. The number of sets of the jig stage 1, the pushing mechanism 2, and the fine adjustment mechanism 3 is not limited to the side card positioning device.

It should be noted that three groups of jig platforms 1, pushing mechanism 2 and fine adjustment mechanism 3 of this application embodiment are all set up on a total supporting bench, and total supporting bench can adjust its height. And, the three groups of jig tables 1, the pushing mechanism 2 and the fine adjustment mechanism 3 can be opened simultaneously or individually, but the invention is not limited thereto.

The jig table 1 is used for placing side plug-in components, and the edge of the jig table 1 is provided with a blocking wall 11. The blocking wall 11 is higher than the jig table 1, and the blocking wall 11 limits the movable range of the side plug-in unit.

Pushing mechanism 2 sets up in one side of tool platform 1, and pushing mechanism 2 can move towards tool platform 1 and along vertical (fore-and-aft direction) promotion side plug-in components to vertical setpoint, and in this application embodiment, vertical setpoint indicates that side plug-in components along vertical butt to being close to keep off the position that wall 11 deviates from pushing mechanism 2, and the side plug-in components can not the butt keep off wall 11 promptly, avoids it to be extruded and warp.

The fine adjustment mechanism 3 is arranged on one side of the jig table 1 departing from the pushing mechanism 2, and the fine adjustment mechanism 3 can limit the side plug-in unit along the transverse direction (the left and right directions) and limit the side plug-in unit at the transverse positioning point. The fine adjustment mechanism 3 can adjust the left and right positions of the side plug-in unit along the transverse positioning point of the side plug-in unit, namely after the side plug-in unit is placed and pushed to the longitudinal positioning point along the longitudinal direction by the pushing mechanism 2.

It should be noted that the transverse positioning points and the longitudinal positioning points are pre-designed to be best for the subsequent processes of the side inserts.

Fig. 2 is a partial structural schematic diagram of the side card positioning device according to the embodiment of the present application, the jig table 1 includes two opposite jig table units 10, the two jig table units 10 are opposite in a transverse direction, the blocking wall 11 is enclosed on the outer periphery of the jig table unit 10, and an opening 100 is formed between the two blocking walls 11. It should be noted that the jig table single bodies 10 are of a rectangular parallelepiped structure, and the blocking walls 11 are disposed on three sides of the jig table single bodies 10, that is, the opposite sides of the two jig table single bodies 10 are not provided with the blocking walls 11.

The pushing mechanism 2 is opposed to the opening 100 in the longitudinal direction. The pushing mechanism 2 can protrude into the opening 100 when moving in the longitudinal direction.

The jig table single body 10 is provided with a groove 101 at one side close to the pushing mechanism 2, the pushing mechanism 2 is provided with a pushing limb 21, and the pushing limb 21 can move into the groove 101 along the longitudinal direction. The recess 101 is located inwardly of the abutment wall 11 and allows a certain pushing distance to be reserved for the pushing limb 21.

Fig. 3 is a schematic structural diagram of the pushing mechanism 2 according to the embodiment of the present application, and referring to fig. 2 and 3, the pushing mechanism 2 is provided with two pushing limbs 21, and the pushing limbs 21 correspond to the jig table units 10 one to one. Because tool platform monomer 10 is used for supporting the left and right ends of side plug-in components, promote the limb 21 and the tool platform monomer 10 one-to-one can promote the left end and the right-hand member of side plug-in components, more steady when promoting the limb 21 and promoting the side plug-in components.

With continued reference to fig. 2 and 3, the jig table 1 further includes a base table 12 located between the two jig table units 10, it can be understood that the jig table units 10 are disposed on the surface of the base table 12, and the pushing limbs 21 can make the side inserts reach the longitudinal positioning points when abutting against the base table 12 in the longitudinal direction. That is, the pushing limb 21 stops when contacting the finger abutment 12, and the side insert is located at the longitudinal positioning point, which is different from the pushing limb 21 stopping when abutting the side insert against the blocking wall 11, the abutment 12 is configured to prevent the side insert from being deformed by extrusion.

With continued reference to fig. 3, the pushing limb 21 includes a limb apex 211 and a limb tail 212, the limb apex 211 is located at a side of the limb tail 212 close to the jig table 1 in the longitudinal direction, and the limb apex 211 is located above the base table 12 without interfering with the base table 12, and the limb tail 212 can abut against the base table 12. The limb apex 211 and the limb tail end 212 are not on the same horizontal plane, the limb apex 211 is used for pushing the side insert, the limb tail end 212 can be abutted with the base platform 12 during sliding, and as the limb apex 211 is closer to the jig platform 1 than the limb tail end 212, the limb apex 211 firstly contacts the side insert and then continues to move for a distance along the longitudinal direction, and the limb tail end 212 contacts the base platform 12, and then the pushing limb 21 stops moving along the longitudinal direction.

A connecting limb 22 is arranged between the two pushing limbs 21; the pushing mechanism 2 further comprises a cylinder 20, and the output end of the cylinder 20 is connected with a connecting limb 22. The two pushing limbs 21 are integrated after the connecting limb 22 is arranged between the two pushing limbs 21, and the two pushing limbs 21 can move simultaneously after the air cylinder 20 applies thrust, so that the pushing mechanism 2 can run more stably.

Fig. 4 is a schematic partial structural view of the jig table 1 according to the embodiment of the present application. Referring to fig. 4, the blocking wall 11 is provided with notches 110 at the vertices of right angles, and each notch 110 is provided with one fine adjustment mechanism 3.

In addition, as can be seen in fig. 4, the notch 110 and the groove 101 are not in a plane. The indentation 110 is located higher than the recess 101. referring to figure 3, the plane of the limb end 212 is coincident with the plane of the recess 101 and the plane of the limb tip 211 is coincident with the plane of the indentation 110.

Further, the fine adjustment mechanism 3 includes an adjustment seat 31 and a bearing 32, the adjustment seat 31 is disposed outside the notch 110 along the transverse direction, where "outside" refers to the area surrounded by the blocking wall 11 for placing the side plug-in, and the bearing 32 is connected to the adjustment seat 31 and can limit the side plug-in to the transverse positioning point. When the side insert contacts the bearing 32, sliding or rolling contact occurs between the two and eventually restrains the side insert at the laterally located point.

Referring to fig. 2 and 4, the fine adjustment mechanism 3 on the left side is defined as a first fine adjustment mechanism 3A, and the fine adjustment mechanism 3 on the right side is defined as a second fine adjustment mechanism 3B. The bearing 32 of the first fine adjustment mechanism 3A is elastically connected to the adjustment base 31 and always receives an elastic force moving in the direction of the second fine adjustment mechanism 3B. That is, the bearing 32 of the first fine adjustment mechanism 3A presses the side insert and aligns it left and right. The bearing 32 of the second fine adjustment mechanism 3B can be fixed to any position of the adjustment seat 31, and therefore, the position of the bearing 32 on the adjustment seat 31 can be adjusted to accommodate side inserts of different sizes, and thus, the adjustment mechanism can be adapted to side inserts of different types. For example, the side insert positioning device of the present embodiment can simultaneously position three side inserts, that is, can simultaneously position three side inserts, the sizes of different side inserts may be different, and the bearings 32 are disposed at different positions on the adjusting seat 31.

Fig. 5 is a schematic structural diagram of a first viewing angle of the first fine adjustment mechanism 3A according to the embodiment of the present application, and fig. 6 is a schematic structural diagram of a second viewing angle of the first fine adjustment mechanism 3A according to the embodiment of the present application. As shown in fig. 5 and 6, the first adjusting seat 31A of the first fine adjustment mechanism 3A is provided with a spring 31B, a first adjusting rod 31C and an electric push rod 31D, one end of the spring 31B is fixedly connected to an inner wall of the first adjusting seat 31A, the other end of the spring 31B is connected to the first adjusting rod 31C, the electric push rod 31D is located on one side of the spring 31B, and the electric push rod 31D and the spring 31B are not located on the same horizontal plane.

That is, in the initial state, the electric push rod 31D is in the retracted state, the output rod 31E is not in contact with the first adjusting rod 31, the side insert contacts the bearing 32 of the first fine adjustment mechanism 3A and presses the spring 31B, and then when the limb end 212 of the pushing mechanism 2 contacts the base 12, the electric push rod 31D is opened, the output rod 31E pushes the first adjusting rod 31C, so that the side insert moves rightward and aligns the side insert rightward, and after the alignment, the electric push rod 31D can return to the retracted state again, and at this time, the first adjusting rod 31C can continuously abut against the first adjusting rod 31C under the action of the spring 31B. In this case, the second fine adjustment mechanism 3B is a right reference point of the side card lateral positioning point.

Fig. 7 is a schematic structural diagram of a second fine adjustment mechanism 3B according to an embodiment of the present application, a second adjustment seat 31F of the second fine adjustment mechanism 3B is connected with a second adjustment rod 31G, the second adjustment seat 31F is provided with a first limit tooth 31H, the first limit tooth 31H is triangular, a bottom of the second adjustment rod 31G is provided with a second limit tooth 31I, the second adjustment rod 31G can be clamped in the second adjustment seat 31F along a vertical direction, that is, the second limit tooth 31I can be clamped in the first limit tooth 31H.

In addition, the second adjustment lever 31G is sleeved with a plurality of bearings 32 (the bearings 32 are not shown in fig. 7).

The number of bearings 32 in the first and second

fine adjustment mechanisms

3A and 3B can be adjusted according to the height of the actual side plug-in unit. For example, the number of bearings 32 on the first fine adjustment mechanism 3A may be two, three, or another number.

The working principle of the side plug-in positioning device of the invention is as follows: firstly, the side insert is transferred to the jig table 1, at the moment, the maximum movable range of the side insert is limited by the baffle wall 11, the pushing mechanism 2 is started, the pushing limb 21 is enabled to move towards the direction of the side insert, when the limb tail end 212 contacts the base station 12, the side insert is limited at a longitudinal positioning point, in the process of pushing the side insert, the bearing 32 of the first fine adjustment mechanism 3A can be caused to move outwards, namely the spring 31B is compressed, when the limb tail end 212 contacts the base station 12, the electric push rod 31D is started, the side insert is enabled to move towards the direction of the second fine adjustment mechanism 3B, and finally, the side insert is stopped at a transverse positioning point.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A side insert positioning device, comprising:

the jig platform (1), the jig platform (1) is used for placing side plug-in components, and the edge of the jig platform (1) is provided with a blocking wall (11) higher than the surface of the jig platform;

the pushing mechanism (2) is arranged on one side of the jig table (1), and the pushing mechanism (2) can move towards the jig table (1) and push the side plug-in unit to a longitudinal positioning point along the longitudinal direction; and

the fine adjustment mechanism (3) is arranged on one side, deviating from the pushing mechanism (2), of the jig table (1), and the fine adjustment mechanism (3) can transversely limit the side plug-in unit and limit the side plug-in unit at a transverse positioning point.

2. The side insert positioning device according to claim 1, wherein the jig table (1) comprises two opposite jig table single bodies (10), the two jig table single bodies (10) are opposite in the transverse direction, the blocking wall (11) is enclosed on the periphery of the jig table single body (10), and an opening (100) is formed between the two blocking walls (11);

the pushing mechanism (2) is opposite to the opening (100) along the longitudinal direction.

3. The side card positioning device according to claim 2, wherein the jig table unit (10) is provided with a groove (101) at a side close to the pushing mechanism (2), the pushing mechanism (2) is provided with a pushing limb (21), and the pushing limb (21) can move into the groove (101) along the longitudinal direction.

4. The side card positioning device according to claim 3, wherein the pushing mechanism (2) is provided with two pushing limbs (21), and the pushing limbs (21) correspond to the jig table units (10) one by one.

5. The side insert positioning device according to claim 4, wherein the jig table (1) further comprises an abutment (12) between the two jig table units (10), and the pushing limb (21) can push the side insert to the longitudinal positioning point when abutting against the abutment (12) in the longitudinal direction.

6. The side insert positioning device according to claim 5, wherein the pushing limb (21) comprises a limb apex (211) and a limb tail end (212), the limb apex (211) is located at one side of the limb tail end (212) close to the jig table (1) along the longitudinal direction, the limb apex (211) is located above the base table (12) and does not interfere with the base table (12), and the limb tail end (212) can abut against the base table (12).

7. A side insert positioning device according to any of claims 3-6, characterized in that a connecting limb (22) is provided between the two pushing limbs (21);

the pushing mechanism (2) further comprises an air cylinder (20), and the output end of the air cylinder (20) is connected with the connecting limb (22).

8. Side insert positioning device according to claim 7, wherein the retaining wall (11) is provided with a notch (110) at the right angle vertex, said notch (110) being provided with one of said fine adjustment means (3);

the fine adjustment mechanism (3) comprises an adjustment seat (31) and a bearing (32), the adjustment seat (31) is transversely arranged on the outer side of the notch (110), and the bearing (32) is connected to the adjustment seat (31) and can enable the side plug-in to be limited at a transverse positioning point.

9. A side insert positioning device according to claim 8, characterized in that the bearing (32) on the first (3A) of the two fine adjustment mechanisms (3) is elastically connected to the adjustment seat (31) and always subjected to a spring force moving in the direction of the other fine adjustment mechanism (3);

and a bearing (32) on a second fine adjustment mechanism (3B) of the two fine adjustment mechanisms (3) is fixedly connected to any position on the adjusting seat (31).

10. The side card positioning device according to claim 9, wherein the first adjusting seat (31A) of the first fine adjustment mechanism (3A) is provided with a spring (31B), a first adjusting rod (31C) and an electric push rod (31D), two ends of the spring (31B) are respectively connected with the inner wall of the first adjusting seat (31A) and the first adjusting rod (31C), the electric push rod (31D) is positioned at one side of the spring (31B) and is selectively connected with the first adjusting rod (31C), and the electric push rod (31D) and the spring (31B) are not on the same horizontal plane;

second of second fine-tuning (3B) is adjusted seat (31F) and is equipped with first spacing tooth of a plurality of (31H) along self length direction, it adjusts pole (31F) to be equipped with the second on second is adjusted seat (31F), second adjust pole (31F) be equipped with first spacing tooth (31H) are along spacing tooth of second (31I) of vertical direction joint.