CN209360056U - A kind of regulating device of sliding rail and drawer deviation post - Google Patents

Abstract

The utility model discloses the regulating devices of a kind of sliding rail and drawer deviation post, comprising: pedestal, it can be with the connection of drawer；Offset adjusted mechanism, on the base, offset adjusted mechanism can be contacted with active rail and/or retaining rail to adjust the relative position between pedestal and active rail and/or retaining rail for setting.Pedestal is connect with drawer, by setting, offset adjusted mechanism on the base is contacted with active rail and/or retaining rail, move pedestal relative to active rail and/or retaining rail, adjust pedestal and active rail/retaining rail relative position, and then adjust the relative position of drawer and active rail and/or retaining rail, excessive error caused by modifying factor machining accuracy is insufficient, it is ensured that drawer will not run-off the straight, protrusion or recess and active rail when being moved relative to fixed rail smoothness it is good, Caton will not occur.

Description

A kind of regulating device of sliding rail and drawer deviation post

Technical field

The utility model relates to field of furniture more particularly to the regulating devices of a kind of sliding rail and drawer deviation post.

Background technique

Sliding rail drawer refers to that bottom is provided with the drawer of sliding rail and compares with traditional drawer, and sliding rail drawer has light, suitable The good advantage of slip, thus sliding rail drawer by consumer high praise and gradually promote on the market.

General sliding rail drawer includes drawer, active rail and retaining rail, and drawer is connect with active rail, active rail and fixation Rail clip merges and active rail can fix rail back-and-forth motion relatively.During installation, because machining accuracy is insufficient, drawer and active rail are solid After fixed connection, may cause since error is excessive drawer tilt, installation not just, protrusion or recess, sliding rail is in addition to by drawer Also by the cross force of vertical gravity outside gravity, and then smoothness is poor, even blocks when moving active rail relative to fixed rail , and cause not smooth enough the beauty of drawer appearance.

Utility model content

To solve the above-mentioned problems, the utility model provides the regulating device of a kind of sliding rail and drawer deviation post, can To pass through the relative position for adjusting drawer and active rail and/or retaining rail, it is ensured that drawer will not tilt and active rail is relatively solid Smoothness is good when orbit determination is mobile, and Caton will not occur.

The technical scheme adopted by the utility model to solve the technical problem is as follows: the tune of a kind of sliding rail and drawer deviation post Regulating device, comprising:

Pedestal, can be with the connection of drawer；

Offset adjusted mechanism, on the base, offset adjusted mechanism can be contacted with active rail and/or retaining rail to adjust for setting Save the relative position between pedestal and active rail and/or retaining rail.

Further, the offset adjusted mechanism includes front and back regulating mechanism and/or the up and down adjustment being arranged on the base Mechanism and/or left-right adjusting mechanism, front and back regulating mechanism are used to adjust pedestal and the relative position of retaining rail in the longitudinal direction, Upper and lower adjustment mechanism are for adjusting pedestal and the relative position of active rail in the up-down direction, and left-right adjusting mechanism is for adjusting base Relative position of the seat with active rail in the lateral direction.

Further, the front and back regulating mechanism includes front and back adjusting block and the first driving part, the first driving part It is connect with pedestal, front and back adjusting block respectively to drive front and back adjusting block opposite base to be moved forward and backward, front and back adjusting block can be against In retaining rail, the first driving part drives pedestal mobile to adjust pedestal and the relative position of retaining rail in the longitudinal direction.

Further, the upper and lower adjustment mechanism include up and down adjustment block and the second driving part, the second driving part On the base, the second driving part is connect with up and down adjustment block, and the second driving part drives up and down adjustment block to be pressed on work for setting To raise or reduce pedestal in dynamic rail, and then adjust pedestal and the relative position of active rail in the up-down direction.

Further, the left-right adjusting mechanism includes left and right adjusting block and third driving part, and left and right adjusting block is living Dynamic to be arranged on the pedestal, third driving part is connect respectively to drive left and right adjusting block phase with left and right adjusting block and pedestal Mobile to pedestal, left and right adjusting block is connect with active rail, and third driving part drives pedestal mobile to adjust pedestal and active rail Relative position in the lateral direction.

Further, fixture block and fourth drive part part, fourth drive part part and card are provided on the left and right adjusting block Block connection is moved with driving fixture block to fasten with the bayonet in active rail with limiting left and right adjusting block relative to active rail along the longitudinal direction.

Further, the fourth drive part part includes handle, elastic component and the guiding being arranged on left and right adjusting block Channel, guide channel be arranged at the fixture block, handle is connect with the fixture block, elastic component setting in left and right adjusting block and Elastic component can push fixture block to move along guide channel to be inserted into bayonet, and handle can drive fixture block compression elastic piece with de- from bayonet Out.

Further, teeth are provided on the end face that the fixture block and bayonet fasten.

Further, limited block is provided on the left and right adjusting block, limited block and active rail are fastened to limit left and right and adjust Locking nub moves in left-right direction relative to active rail.

Further, buffer substrate tablet is provided on the left and right adjusting block, buffer substrate tablet is pressed in active rail to buffer left and right Adjusting block and the relative movement of active rail in the longitudinal direction.

The beneficial effects of the utility model are: pedestal is connect with drawer, by the way that offset adjusted mechanism on the base is arranged Contacted with active rail and/or retaining rail, move pedestal relative to active rail and/or retaining rail, adjust pedestal and active rail/ The relative position of retaining rail, and then the relative position of drawer and active rail and/or retaining rail is adjusted, modifying factor machining accuracy is insufficient Caused by excessive error, it is ensured that drawer will not run-off the straight, protrusion or recess and active rail it is mobile relative to fixed rail when it is suitable Slip is good, and Caton will not occur.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples:

Fig. 1 is perspective view when the utility model regulating device is combined with active rail and retaining rail；

Fig. 2 is the perspective view of active rail and retaining rail；

Fig. 3 is the three-dimensional installation diagram of the utility model regulating device；

Fig. 4 is the perspective view of the utility model regulating device；

Fig. 5 is the perspective view of left and right adjusting block；

Fig. 6 is the vertical cross section of upper and lower adjustment mechanism and front and back regulating mechanism part；

Fig. 7 is the horizontal sectional drawing of left-right adjusting mechanism part；

Fig. 8 is the schematic rear view of the utility model regulating device；

Fig. 9 is the decomposition diagram of upper and lower adjustment mechanism；

The schematic diagram of internal structure of Figure 10 left-right adjusting mechanism；

Figure 11 is the perspective view of another embodiment of the utility model regulating device.

Specific embodiment

Referring to figs. 1 to Figure 10, for the convenience of description, setting X-direction in Fig. 1 and Fig. 2, as front-rear direction, Y-direction is right and left To Z-direction is up and down direction.

A kind of regulating device of sliding rail and drawer deviation post, comprising:

Pedestal 21, can be with the connection of drawer；

Offset adjusted mechanism is arranged on pedestal 21, and offset adjusted mechanism can connect with active rail 11 and/or retaining rail 12 Touching is to adjust the relative position between pedestal 21 and active rail 11 and/or retaining rail 12.

Pedestal is connect with drawer, passes through the offset adjusted mechanism and active rail 11 and/or retaining rail being arranged on pedestal 21 12 contacts, move pedestal 21 relative to active rail 11 and/or retaining rail 12, adjust pedestal 21 and 11/ retaining rail of active rail 12 relative position, and then the relative position of drawer and active rail 11 and/or retaining rail 12 is adjusted, modifying factor machining accuracy is insufficient Caused by excessive error, it is ensured that drawer will not run-off the straight, protrusion or recess and active rail 11 it is mobile relative to fixed rail 12 When smoothness it is good, Caton will not occur.

As preferred embodiments of the present invention, the offset adjusted mechanism includes the front and back being arranged on pedestal 21 Regulating mechanism and/or upper and lower adjustment mechanism and/or left-right adjusting mechanism, front and back regulating mechanism is for adjusting pedestal 21 and retaining rail 12 relative position in the longitudinal direction, upper and lower adjustment mechanism are for adjusting the phase of pedestal 21 in the up-down direction with active rail 11 To position, left-right adjusting mechanism is for adjusting pedestal 21 and the relative position of active rail 11 in the lateral direction.Most preferred feelings It simultaneously include front and back regulating mechanism, upper and lower adjustment mechanism and left-right adjusting mechanism under condition.

Pedestal 21 and the relative position of retaining rail 12 in the longitudinal direction are adjusted by front and back regulating mechanism, and then adjusts and takes out With the relative position of retaining rail 12 in the longitudinal direction when drawer is closed, so that drawer is not protruded or is recessed, pass through up and down adjustment machine Structure adjusts pedestal 21 and the relative position of active rail 11 in the up-down direction, and then adjusts drawer and active rail 11 in above-below direction On relative position, pedestal 21 and the relative position of active rail 11 in the lateral direction are adjusted by left-right adjusting mechanism, in turn Drawer and the relative position of active rail 11 in the lateral direction are adjusted, upper and lower adjustment mechanism and left-right adjusting mechanism cooperation can be corrected Drawer tilt guarantees that drawer installation is smooth, front-rear direction, up and down direction, left and right directions is adjusted respectively, can correct any The error in direction and divide the work clear.

As the preferred embodiment of front and back regulating mechanism, the front and back regulating mechanism includes front and back adjusting block 42 and One driving part 40, the first driving part 40 are connect respectively to drive 42 phase of front and back adjusting block with pedestal 21, front and back adjusting block 42 Pedestal 21 is moved forward and backward, front and back adjusting block 42 can be resisted against in retaining rail 12, and the first driving part 40 drives pedestal 21 to move It moves to adjust pedestal 21 and the relative position of retaining rail 12 in the longitudinal direction.

In the case where drawer is closed, front and back adjusting block 42 is resisted against in retaining rail 12, before the driving of the first driving part 40 42 opposite base 21 of adjusting block, since front and back adjusting block 42 is resisted against in retaining rail 12, drives base when front-rear direction is mobile afterwards Seat 21 generates movement in front-rear direction relative to fixed rail 12, and then adjusting pedestal 21 and retaining rail 12 in the longitudinal direction opposite Position.By adjusting pedestal 21 and the relative position of retaining rail 12 in the longitudinal direction, and then adjusts drawer and exist with retaining rail 12 Error is corrected, it is ensured that drawer will not protrude or be recessed in relative position on front-rear direction.

First driving part 40 can there are many embodiments, such as front and back 42 phase of adjusting block can be driven for straight line cylinder It is mobile to pedestal 21, and as preferred embodiment, first driving part 40 includes adjustment seat 41, is arranged in adjustment seat Front and back adjusting nut 43 on 41 and the front and back adjusting screw rod 44 being arranged on the front and back adjusting block 42, adjustment seat 41 are arranged On pedestal 21, front and back adjusting nut 43 is engaged with front and back adjusting screw rod 44 so that front and back is adjusted when front and back adjusting nut 43 rotates 42 relative adjustment seat 41 of block is moved forward and backward, and then is moved forward and backward 42 opposite base 21 of front and back adjusting block.

When work, rotation front and back adjusting nut 43, since front and back adjusting nut 43 is engaged with front and back adjusting screw rod 44, front and back Adjusting nut 43 can push front and back adjusting screw rod 44 to be moved forward and backward, and then make to move before and after 42 relative adjustment seat 41 of front and back adjusting block It is dynamic.The cooperation of adjusting nut 43 front and back adjusting screw rod 44 before and after use, structure is simple and easy to accomplish, is not necessarily to electric component.

As the preferred embodiment of upper and lower adjustment mechanism, the upper and lower adjustment mechanism include up and down adjustment block 63 and Two driving parts 60, the second driving part 60 are arranged on pedestal 21, and the second driving part 60 is connect with up and down adjustment block 63, the Two driving parts 60 drive up and down adjustment block 63 to be pressed in active rail to raise or reduce pedestal 21, so adjust pedestal 21 with The relative position of active rail 11 in the up-down direction.

When work, the second driving part 60 drives 63 opposite base 21 of up and down adjustment block mobile, due to up and down adjustment block 63 It is pressed in active rail 11, so that pedestal 21 is generated displacement in above-below direction with respect to active rail 11, and then adjust pedestal 21 and activity The relative position of rail 11 in the up-down direction.

As the preferred embodiment of up and down adjustment block 63, it is provided on the up and down adjustment block 63 and pushes inclined-plane 631, it is living It is provided in dynamic rail 11 and pushes the matched compression inclined-plane in inclined-plane 631, pushed inclined-plane 631 and be pressed on compression inclined-plane, second drives While dynamic component 60 drives 63 opposite base 21 of up and down adjustment block mobile, it is also relatively living along compression inclined-plane to push inclined-plane 631 Dynamic rail 11 is mobile, due to pushing the presence on inclined-plane 631, makes that upper and lower can be generated when pushing inclined-plane 631 relative to the movement of active rail 11 Upward displacement, while displacement is generated in above-below direction with respect to active rail 11 with moving base 21, and then adjusts pedestal 21 and activity The relative position of rail 11 in the up-down direction.Not necessarily, being provided with compression inclined-plane can make to push away on compression inclined-plane in active rail 11 It is more steady when pressing inclined-plane 631 mobile relative to active rail 11.

Second driving part 60 can there are many embodiments, such as can be straight line cylinder driving 63 phase of up and down adjustment block Pedestal 21 is moved up and down, and as preferred embodiment, second driving part 60 includes adjusting worm screw 61, driving cog Wheel 62 and locating cover 64 are adjusted to be provided with up and down adjustment handle 611 on worm screw 61 and adjust worm screw 61 and be nibbled with transmission gear 62 It closes, is provided with rack gear 632 on the up and down adjustment block 63 and rack gear 632 is engaged with transmission gear 62, the lid of locating cover 64 closes It adjusts on worm screw 61, transmission gear 62 and up and down adjustment block 63 and locating cover 64 is connect with pedestal 21, adjust worm screw 61 and revolve 63 pedestal 21 of up and down adjustment block is mobile when turning.

When work, up and down adjustment handle 611 can be manually rotated, make to adjust the rotation of worm screw 61, and then drive by transmission gear 62 Rack gear 632 keeps 63 opposite base 21 of up and down adjustment block mobile, and the method structure is simple and easy to accomplish, adjusts on worm screw 61 It is provided with up and down adjustment handle 611, facilitates operation to adjust worm screw 61 and rotates, is closed by the lid of locating cover 64 and is adjusting worm screw 61, transmission On gear 62 and up and down adjustment block 63 and locating cover 64 is connect with pedestal 21, can Fast Installation secured adjusted worm screw 61, biography Moving gear 62 and up and down adjustment block 63, and be easy to remove and repair.

As the preferred embodiment of left-right adjusting mechanism, the left-right adjusting mechanism includes left and right adjusting block 51 and Three driving parts 50, left and right adjusting block 51 are movably arranged on the pedestal 21, third driving part 50 respectively with left and right adjusting To drive 51 opposite base 21 of left and right adjusting block mobile, left and right adjusting block 51 and active rail 11 connect for block 51 and the connection of pedestal 21 It connects, third driving part 50 drives pedestal 21 mobile to adjust pedestal 21 and the relative position of active rail 11 in the lateral direction.

When work, third driving part 50 drives 51 opposite base 21 of left and right adjusting block to move left and right, due to left and right adjusting Block 51 is connect with active rail 11, moves left and right pedestal 21 with respect to active rail 11, and then adjusts pedestal 21 and active rail 11 on a left side Relative position in right direction.

There are many embodiments for third driving part 50, such as can be straight line cylinder and drive left and right adjusting block 51 with respect to base Seat 21 moves left and right, and as preferred embodiment, the third driving part 50 includes left and right adjusting screw rod 52, and left and right is adjusted It is provided with left and right adjusting handle 521 on section screw rod 52, is provided on the left and right adjusting block 51 matched with left and right adjusting screw rod 52 Screw thread 53 and left and right adjusting screw rod 52 is engaged with screw thread 53, left and right adjusting screw rod 52 between screw thread 53 and pedestal 21 so that When left and right adjusting screw rod 52 rotates, 51 opposite base 21 of left and right adjusting block is moved left and right.

When work, can be manually rotated left and right adjusting handle 521 rotates left and right adjusting screw rod 52, since left and right adjusting block 51 is arranged Screw thread 53 on pedestal 21 and on left and right adjusting block 51 is engaged with left and right adjusting screw rod 52, and left and right adjusting screw rod 52 pushes a left side Right 51 opposite base 21 of adjusting block moves left and right, the method structure is simple and easy to accomplish, without electrical structure, cost compared with It is low.

In order to make pedestal 21 will not opposite active rail 11 be moved forward and backward, be provided on the left and right adjusting block 51 fixture block 32 with And fourth drive part part 30, fourth drive part part 30 are connect to drive the bayonet 111 in fixture block 32 and active rail 11 with fixture block 32 Fastening is moved along the longitudinal direction with limiting left and right adjusting block 51 relative to active rail 11.

It drives the bayonet 111 on fixture block 32 and active rail 11 to fasten by fourth drive part part 30, makes left and right adjusting block 51 It cannot be moved forward and backward with respect to active rail 11, and then limit pedestal 21 and be moved forward and backward with respect to active rail 11, this mode structure is simple, and And it is easy installation or removal.

As fourth drive part part 30, there are many embodiments, such as can be straight line cylinder driving fixture block 32 movement to insert Card inlet 111, and as preferred embodiment, the fourth drive part part 30 includes handle 33, elastic component 34 and setting Guide channel 31 on left and right adjusting block 51, guide channel 31 are arranged at the fixture block 32, handle 33 and the fixture block 32 Connection, elastic component 34 is arranged in left and right adjusting block 51 and elastic component 34 can push fixture block 32 to move along guide channel 31 to insert Card inlet 111, handle 33 can drive 32 compression elastic piece 34 of fixture block to deviate from from bayonet 111.

It when installation, stirs handle 33 and then fixture block 32 is driven to take in left and right adjusting block 51, elastic component 34 compresses at this time, will The elastic restoring force driving fixture block 32 of release handle 33 when fixture block 32 is directed at bayonet 111, elastic component 34 is moved along guide channel 31 And it is finally fastened with bayonet 111, while elastic component 34 prevents fixture block 32 from exiting bayonet 111.When disassembly, handle 33 only need to be stirred, Make that fixture block 32 exits bayonet 111 and mobile foundation 21 leaves.

As the preferred embodiment that fixture block 32 is connect with handle 33, fluted 321 are arranged on the fixture block 32, guiding is logical Road 31 is provided with opening 311 at groove 321, and handle 33 is arranged between left and right adjusting block 51 and pedestal 21 and handle 33 can It rotates, protruding block 331 is provided on handle 33 and protruding block 331 passes through opening 311 and is engaged with groove 321, handle 33 rotates When fixture block 32 can be driven mobile.

It is even closer in order to fasten fixture block 32 and bayonet 111, it is arranged on the end face that the fixture block 32 is fastened with bayonet 111 There are teeth 322.

By the way that teeth 322 are arranged on fixture block 32, it can be fastened with different size of bayonet 111, improve wide usage, mention simultaneously Tightness degree when height fastens.

Left and right adjusting block 51 is connect with active rail can be there are many embodiment, such as can be fixedly connected by screw, And as preferred embodiment, limited block 54 is provided on the left and right adjusting block 51, limited block 54 and active rail 11 fasten It is moved in left-right direction with limiting left and right adjusting block 51 relative to active rail 11.

Be fastened in active rail 11 along the longitudinal direction by limited block 54, connect left and right adjusting block 51 with active rail 11 with Limitation left and right adjusting block 51 is moved left and right with respect to active rail 11, this mode facilitates installing and dismounting, improves convenience.

Strike note is generated when drawer is closed in order to prevent, is provided with buffer substrate tablet 55, buffer substrate tablet on the left and right adjusting block 51 55 are pressed in active rail 11 to buffer left and right adjusting block 51 and the relative movement of active rail 11 in the longitudinal direction.

When closing drawer, since inertia left and right adjusting block 51 collides with active rail 11, setting buffer substrate tablet 55 can be buffered Left and right adjusting block 51 absorbs the impact force of collision, and then reducing collisions sound with respect to the back-and-forth motion of active rail 11, simultaneously as slow Punching effect protects the components from damage.

It further include having mounting portion 70 as another embodiment of the utility model with reference to Figure 11, mounting portion 70 can be Auxiliary positioning when pedestal 21 is connect with drawer, and then facilitate installation and position is more accurate.

Above-described embodiment is the preferred embodiment of the utility model, and the utility model can also have other embodiments.Ability The technical staff in domain can also make equivalent deformation or replacement without departing from the spirit of the present invention, these equivalent changes Type or replacement are all contained in range set by the claim of this application.

Claims (10)

1. the regulating device of a kind of sliding rail and drawer deviation post characterized by comprising

Pedestal (21), can be with the connection of drawer；

Offset adjusted mechanism is arranged on pedestal (21), and offset adjusted mechanism can be with active rail (11) and/or retaining rail (12) Contact is to adjust the relative position between pedestal (21) and active rail (11) and/or retaining rail (12).

2. the regulating device of a kind of sliding rail and drawer deviation post according to claim 1, it is characterised in that: the offset Regulating mechanism includes regulating mechanism and/or upper and lower adjustment mechanism and/or left-right adjusting mechanism before and after being arranged on pedestal (21), Front and back regulating mechanism is used for adjusting pedestal (21) and the relative position of retaining rail (12) in the longitudinal direction, upper and lower adjustment mechanism In adjusting pedestal (21) and the relative position of active rail (11) in the up-down direction, left-right adjusting mechanism is for adjusting pedestal (21) With the relative position of active rail (11) in the lateral direction.

3. the regulating device of a kind of sliding rail and drawer deviation post according to claim 2, it is characterised in that: the front and back Regulating mechanism includes front and back adjusting block (42) and the first driving part (40), the first driving part (40) respectively with pedestal (21), front and back adjusting block (42) connection is to drive front and back adjusting block (42) opposite base (21) to be moved forward and backward, front and back adjusting block (42) it can be resisted against on retaining rail (12), it is pedestal (21) and solid to adjust that the first driving part (40) drives pedestal (21) mobile The relative position of orbit determination (12) in the longitudinal direction.

4. the regulating device of a kind of sliding rail and drawer deviation post according to claim 2, it is characterised in that: above and below described Regulating mechanism includes up and down adjustment block (63) and the second driving part (60), and the second driving part (60) is arranged in pedestal (21) On, the second driving part (60) is connect with up and down adjustment block (63), and the second driving part (60) drives up and down adjustment block (63) to support It is pressed in active rail to raise or reduce pedestal (21), and then adjusts the phase of pedestal (21) with active rail (11) in the up-down direction To position.

5. the regulating device of a kind of sliding rail and drawer deviation post according to claim 2, it is characterised in that: the left and right Regulating mechanism includes left and right adjusting block (51) and third driving part (50), and left and right adjusting block (51) is movably arranged on the base On seat (21), third driving part (50) is connect respectively with left and right adjusting block (51) and pedestal (21) to drive left and right adjusting block (51) opposite base (21) is mobile, and left and right adjusting block (51) is connect with active rail (11), and third driving part (50) drives pedestal (21) it moves to adjust pedestal (21) and the relative position of active rail (11) in the lateral direction.

6. the regulating device of a kind of sliding rail and drawer deviation post according to claim 5, it is characterised in that: the left and right Fixture block (32) and fourth drive part part (30) are provided on adjusting block (51), fourth drive part part (30) is connect with fixture block (32) To drive the bayonet (111) on fixture block (32) and active rail (11) to fasten to limit left and right adjusting block (51) with respect to active rail (11) It moves along the longitudinal direction.

7. the regulating device of a kind of sliding rail and drawer deviation post according to claim 6, it is characterised in that: the described 4th Driving part (30) includes the guide channel (31) of handle (33), elastic component (34) and setting on left and right adjusting block (51), Guide channel (31) is arranged at the fixture block (32), and handle (33) is connect with the fixture block (32), and elastic component (34) setting exists In left and right adjusting block (51) and elastic component (34) can push fixture block (32) mobile to be inserted into bayonet along guide channel (31) (111), handle (33) can drive fixture block (32) compression elastic piece (34) to deviate from from bayonet (111).

8. the regulating device of a kind of sliding rail and drawer deviation post according to claim 6, it is characterised in that: the fixture block (32) teeth (322) are provided on the end face fastened with bayonet (111).

9. the regulating device of a kind of sliding rail and drawer deviation post according to claim 5, it is characterised in that: the left and right It is provided on adjusting block (51) limited block (54), limited block (54) is fastened with active rail (11) to limit left and right adjusting block (51) phase Active rail (11) is moved in left-right direction.

10. the regulating device of a kind of sliding rail and drawer deviation post according to claim 5, it is characterised in that: the left side It is provided with buffer substrate tablet (55) on right adjusting block (51), buffer substrate tablet (55) is pressed on active rail (11) to buffer left and right adjusting block (51) with the relative movement of active rail (11) in the longitudinal direction.