CN217620465U - Aluminum table top support with multiple combination modes - Google Patents

Abstract

The utility model relates to an aluminum table top bracket with multiple combination modes, which comprises a bracket operation table top made of aluminum material and a supporting foot rest, wherein the bracket operation table top comprises a left table top, a right table top and a middle table top positioned between the left table top and the right table top and used for lengthening the whole table top after jointing, and both sides of each table top are embedded with straight racks; under the condition of ensuring that the overall structure does not change greatly, the middle of the original table top is separated, connecting ends which can be quickly butted and fixedly connected into a whole are additionally arranged at each separated end, the table top in the spare mechanism lengthening part is butted to the working part in a turnover mode, so that a single aluminum table top support is lengthened, meanwhile, two aluminum table top supports can be connected with each other, the working table top is further lengthened, and the processing requirements of wood with various length specifications are met.

Description

Aluminum table top support with multiple combination modes

Technical Field

The utility model belongs to the technical field of carpenter's operation auxiliary stand, in particular to aluminium mesa support with multiple compound mode.

Background

The woodworking bracket is a necessary tool in the woodworking process, has the functions of bearing wood, providing an operating platform and the like, changes in shape and function of the woodworking bracket along with the development of woodworking manufacturing, and continuously meets the requirement of the existing table top woodworking manufacturing from an original wooden bench to an existing multifunctional platform made of metal. However, in the aspect of portability and applicability in use, the existing woodworking supports still have certain limitations, especially in the operation of blanking wood, because the initial length of the common wood is about 3-4 m, the length of one woodworking support is not enough to support, several temporary splices are needed, the temporary splicing mode is time-consuming and labor-consuming, the connection strength is not guaranteed, and the labor amount of workers is increased by storage and transportation of a plurality of woodworking supports when the woodworking supports are not used.

Disclosure of Invention

To the defect that above-mentioned prior art exists, the utility model aims to solve the technical problem that an aluminium mesa support that has the multiple compound mode of self extension or concatenation each other is provided.

The invention aims to be realized by the following technical scheme: the utility model provides an aluminium mesa support with multiple combination mode, includes two parts of the support operation mesa of aluminium material, support foot rest, and the support operation mesa includes left mesa and right mesa and is located the well mesa that is used for lengthening whole mesa after the joint between left mesa and the right mesa, and the both sides of each mesa all are inlayed and are equipped with the spur rack.

Preferably, the left table top and the right table top each comprise: the table-board type connecting device comprises a section bar, an inner connecting piece fixedly connected with one end of the inner side of the table-board section bar, and an outer connecting piece fixedly connected with one end of the outer side of the section bar. The two table-boards can be connected with each other through arranging the connecting piece and can also be connected with the lengthening part. The outer end face of the inner joint piece is provided with two convex first pins, two convex second pins, two concave first pin grooves and two concave second pin grooves; the first pin column and the first pin groove are horizontally arranged and close to the table top, and the second pin column and the second pin groove are horizontally arranged and relatively far away from the table top; the first pin column and the first pin groove are hollow, an elastic hanging buckle is arranged in the first pin groove, the bottom of the elastic hanging buckle is fixed, and a handle part which is opened and pressed is arranged in the middle of the elastic hanging buckle; the connection surface of the outer joint part is provided with a convex third pin column, a convex fourth pin column, two concave third pin grooves and two concave fourth pin grooves. The connected mode of connecting piece adopts the connection of pin post and cotter way plug-in type, and the joint is convenient and can automatic correction dislocation to utilize the hollow space of cotter way to set up elasticity and hang the knot, locked when connecting like this, do not have all the other additional actions during the joint, it is convenient fast, handle portion that the split was pressed is also in hookup location one side, therefore the split is also convenient equally.

Preferably, a lock hook and a lock pin with matched models are arranged below the outer joint piece in the left table top, and a back-connected lock catch is further arranged on the outer end face of the left table top; the right table top is also provided with a lock hook and a lock pin with matched models below the outer joint piece, and the upper surface of the right table top is provided with a butt lock catch. The arrangement of the external connector is used for butt joint and back joint of two aluminum table supports, and locking of the lock catch is added in addition to the matching of the lock hook and the lock pin in the connection mode, so that locking joint has better strength. The upper surface of the outer joint piece in the left table top is also provided with a first lock hook connecting part for connecting lock hooks of the butt lock; the end face of the outer connector in the right table top is provided with a second lock hook hanging part for connecting with the lock hook of the back-connected lock catch.

Preferably, the support foot rest comprises a sliding beam in the middle, two connecting seats respectively arranged at two ends of the sliding beam, and guide sliding rails are symmetrically arranged on two sides of each connecting seat. The upper part of the sliding beam is used for supporting the table top, and the middle part of the lower part of the sliding beam is used for hanging the middle table top. The middle table top comprises a middle section bar hung on the sliding beam, two middle joint pieces fixedly connected with two ends of the middle section bar, and a turning matching sleeve arranged in the middle of the middle section bar. After the turnover matching sleeve is connected with the middle table top, the middle table top can be converted between the lower suspension part and the upper part to form a working surface through rotation.

Preferably, the middle section bar is provided with a full-length matching groove matched with the width of the sliding beam, the bottom surface of the middle joint part is provided with a stop block, and the lower side of the middle part of the sliding beam is provided with a semicircular positioning piece for transversely limiting the overturning matching sleeve and playing a role in determining the height after the overturning matching sleeve is overturned and positioned. Semicircle setting element has played two effects, and one is horizontal spacing, and another is platform height and support it in confirming through the height of design semicircle setting element.

To sum up, compared with the prior art, the utility model has the following advantages:

the utility model discloses a support operation mesa, the support foot rest two parts of aluminium material, support operation mesa include left mesa and right mesa and be located the middle mesa that is used for the whole mesa of extension after the joint between left mesa and the right mesa, and the both sides of each mesa are all inlayed and are equipped with the spur rack. Under the condition of ensuring that the overall structure is not greatly changed, the middle of the original table top is separated, connecting ends which can be quickly butted and fixedly connected into a whole are additionally arranged at each separated end, the table top in the spare mechanism lengthening part is butted to the working part in an overturning way, so that the single aluminum table top support is lengthened, meanwhile, two aluminum table top supports can be mutually connected, the working table top is further lengthened, and the processing requirements of wood with various length specifications are met.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the left and right table top being moved outward to lengthen the table;

FIG. 3 is a schematic structural view of a supporting leg;

FIG. 4 is a schematic view of the structure of the guide rail and the guide chute;

FIG. 5 is a schematic structural view of the left table top and the right table top of the present invention when they are initially separated;

FIG. 6 is a partial enlarged view of the portion A in FIG. 5;

FIG. 7 is a partial enlarged view of the portion B in FIG. 5;

fig. 8 is a schematic structural view of the utility model with the left table top and the right table top hidden;

FIG. 9 is a schematic view of the utility model after being lengthened;

FIG. 10 is a schematic view of the structure of the flip-fit sleeve;

FIG. 11 is a schematic structural view of a sliding beam embedded in a middle table;

FIG. 12 is a schematic view of a butt joint structure of two aluminum table supports;

FIG. 13 is a schematic view of two aluminum table supports folded and about to be assembled back to back;

fig. 14 is a schematic structural view of two aluminum table supports after being folded and combined back to back.

The mark in the figure is: 1-support operation table top, 11-table top section bar, 12-inner connecting piece, 13-outer connecting piece, 15-guide sliding groove, 2-support foot frame, 21-sliding beam, 22-connecting seat, 23-foot bar mounting seat, 24-foot bar, 25-locking mechanism, 26-foot pad, 28-guide sliding rail, 29-semicircular positioning piece, 3-left table top, 31-first pin column, 32-first pin groove, 33-second pin column, 34-second pin groove, 35-elastic hanging buckle, 35K-clamping part, 4-right table top, 41-third pin column, 42-third pin groove, 43-fourth pin column, 44-fourth pin groove, 45-butt-joint lock catch, 45 b-first lock-joint part, 46-back joint, 46 b-second lock-joint part, 47-lock hook, 48-lock pin, 5-middle table top, 51-middle connecting piece, 52-middle connecting piece, 57-stop block, 58-turnover matching sleeve, 6-handle lock hole, 61-63-axle sleeve hole, and wheel axle sleeve hole.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

example 1

As shown in fig. 1-14, the aluminum table support with various combination modes comprises a support operation table 1 and a support foot rest 2. The aluminum table-board bracket can be lengthened by itself, or two aluminum table-board brackets can be spliced and lengthened, the two functions can be synchronously used or used independently, the aluminum table-board bracket can be folded for convenient transportation and storage, and the two aluminum table-board brackets can be combined into a whole after being folded; the support operation table top 1 comprises a primary portion and a lengthened portion which are mutually independent, the primary portion comprises a left table top 3 and a right table top 4, the lengthened portion is a middle table top 5 of spare parts, and each table top is made of molded aluminum profiles.

The left table top 3 and the right table top 4 both comprise: the table-board section bar 11, an inner connector 12 fixedly connected with one end of the inner side of the table-board section bar 11 and an outer connector 13 fixedly connected with one end of the outer side of the table-board section bar 11;

in order to facilitate the interconnection between the table boards, the outer end face of the inner joint part 12 is provided with two convex first pins 31 and second pins 33 and two concave first pin grooves 32 and second pin grooves 34 for guiding and ensuring that the butt joint position is not misplaced, the first pins 31 and the first pin grooves 32 are horizontally arranged and close to the table boards, and the second pins 33 and the second pin grooves 34 are horizontally arranged and relatively far away from the table boards; the first pin 31 and the first pin groove 32 are hollow, an elastic hanging buckle 35 is arranged in the first pin groove 32, the bottom of the elastic hanging buckle 35 is fixed and plays a role of a fulcrum, a handle part for opening and pressing is arranged in the middle of the elastic hanging buckle 35, and clamping parts 35K for connecting hooks of the elastic hanging buckle 35 are respectively arranged in the first pin 31 and the first pin groove 32; the connecting surface of the outer connecting piece 13 is provided with a convex third pin column 41 and a convex fourth pin column 43, and two concave third pin grooves 42 and fourth pin grooves 44 for guiding and ensuring that the positions of the aluminum table supports are not dislocated when the aluminum table supports are connected with each other; the positions of the elastic hanging buckles 35 arranged in the left table top 3 and the right table top 4 need to be staggered with each other, namely, corresponding pins enter pin grooves when the left table top 3 and the right table top 4 are jointed, and the elastic hanging buckles 35 are also staggered to enter opposite directions to be clamped with corresponding clamping parts 35K to finish clamping; a lock hook 47 and a lock column 48 with matched models are arranged below the outer connector 13 in the left table top 3, and a long lock catch 46 is arranged on the outer end surface of the left table top; the right table top 4 is also provided with a locking hook 47 and a locking column 48 with matched models below the external joint 13, and the upper surface of the right table top is provided with a butt-joint lock catch 45. The upper surface of the outer joint member 13 in the left table-board 3 is also provided with a first latch hook connecting part 45b for connecting the latch hook of the butt latch 45; the end surface of the outer joint member 13 in the right deck 4 is provided with a second latch hook connecting portion 46b to which the latch hook of the long latch 46 is connected. The support foot stand 2 comprises a sliding beam 21 in the middle, two connecting seats 22 respectively arranged at two ends of the sliding beam 21, and a foot rod mounting seat 23 for mounting the connecting seats 22; t-shaped slide rails 28 are symmetrically arranged on two sides of the connecting seat 22; the foot bar mounting seat 23 is composed of a middle plate, an upper plate and side plates at two sides, each side plate is hinged with a foot bar 24, a concentric positioning hole is arranged below the hinged point of each foot bar 24 and the side plate, and a locking mechanism 25 is matched in the positioning hole. A lock hook 47 and a lock pin 48 with matched models are arranged below the outer connector 13 in the left table top 3, and a back lock catch 46 is arranged on the outer end surface of the left table top; a locking hook 47 and a locking pin 48 with matched models are also arranged below the outer joint part 13 in the right table top 4, and the upper surface of the right table top is provided with a butt-joint lock catch 45; the upper surface of the outer joint piece 13 in the left table-board 3 is also provided with a first lock hook connecting part 45b for connecting the lock hook of the butt lock 45; the end surface of the outer joint element 13 in the right table-board 4 is provided with a second latch hook hanging part 46b for connecting a latch hook back connected with the latch hook 46; when two aluminum table supports are connected in a butt joint mode, as shown in fig. 11, a lock hook 47 and a lock pin 48 on one aluminum table support are respectively connected with a lock hook 47 and a lock pin 48 on the other aluminum table support in a buckling mode, then a butt joint lock catch 45 on one aluminum table support is connected with a first lock hook connecting part 45b on the other aluminum table support in a buckling mode, and therefore the upper portion and the lower portion of the lock joint connection are connected with a pin column and a pin groove of the end face in a plugging mode, and therefore the joint which is not staggered and has enough connecting strength can be formed.

When the two aluminum table-board supports are mutually connected in a back-to-back manner, the latch hooks of the back-to-back latch catches 46 at the two ends of the upper aluminum table-board support and the lower aluminum table-board support are correspondingly and respectively connected with the second latch hook hanging part on the other aluminum table-board support in a buckling manner, so that the two aluminum table-board supports can be quickly connected into a whole.

Because the inner connector 12 on the left table top 3 and the inner connector 12 on the right table top 4 are arranged oppositely, when the left table top 3 is connected with the right table top 4, the positions of each pin column and each pin groove on the left table top 3 are matched with those on the right table top 4, namely, the pin-joint coordination is formed mutually, namely, the original parts of the support operation table top 1 are formed by mutually butting the left table top 3 and the right table top 4 through the inner connector 12, during butting, the elastic hanging buckles 35 are inserted into the hollow holes of the opposite first pin column 31 and the first pin groove 32 in a vertically staggered manner, are pushed away by the outer side wall of the hollow hole to be deformed and inserted, are rebounded and reset after being in place, buckle the bottom of the hollow hole, and play a role in buckling and locking. When the head lock hook is separated, the handle part in the middle of the elastic hanging buckle 35 is pushed inwards to separate the head lock hook from the bottom of the hollow hole, and the head lock hook is pulled open.

The supporting foot stand 2 comprises a sliding beam 21 in the middle, two connecting seats 22 respectively arranged at two ends of the sliding beam 21, and a foot rod mounting seat 23 for mounting the connecting seats 22; the foot bar mounting base 23 is substantially in a reverse-buckled dustpan shape and is composed of a middle plate, an upper plate and side plates on two sides, wherein each side plate is hinged with a foot bar 24, in order to prevent the foot bar 24 from rotating around a hinged joint during working, a concentric positioning hole is arranged between the hinged joint and the side plate of each foot bar 24, a locking mechanism 25 is arranged, and a positioning pin of the locking mechanism 25 is inserted into the positioning hole to lock the foot bar 24. A foot pad 26 is fixed at the lower end of the foot rod 24, a fine adjustment mechanism is arranged at the joint of the foot pad 26 and the foot rod 24, the overall length of the foot rod 24 can be adjusted, so that the foot stand 2 is leveled integrally, the sliding beam 21 is made of rectangular steel pipes, guide sliding rails 28 are symmetrically arranged at two sides of the connecting seat 22, the guide sliding rails 28 are used for being matched with the bottom of the support operation table board 1 in a sliding manner, in use, the left table board 3 and the right table board 4 are respectively connected with the guide sliding rails 28 on one side in a sliding manner, after connection, when the left table board 3 and the right table board 4 slide towards the center, when the two table boards are connected in a contact manner, one ends of the outer sides of the two table boards are also simultaneously abutted against one end of the outer side of the sliding beam 21, and the positions of the two table boards are fixed and reliable after connection is completed.

The middle table top 5 comprises a middle section bar 51 hung on the sliding beam 21, two middle joint pieces 52 fixedly connected with two ends of the middle section bar 51, and a turnover matching sleeve 58 arranged in the middle of the middle section bar 51; as shown in fig. 10-11, the turning fitting sleeve 58 is rotatably fitted over the sliding beam 21, and an opening is formed on one side of the middle section bar 51, the opening is just large enough to allow the sliding beam 21 to pass through, and a through long fitting groove matched with the width of the sliding beam 21 is formed in the position of the middle section bar 51 opposite to the opening, so that when the middle section bar 5 is turned over, the through long fitting groove falls into the sliding beam 21 and is supported by the sliding beam 21, and then the middle section bar 5 can be connected with the left and right section bars, for convenient connection, the outer end surfaces of the two middle joint pieces 52 are also provided with pins and pin grooves of the same type as the pins and pin grooves on the corresponding inner joint pieces 12 for guiding, so as to ensure non-dislocation during butt joint, the bottom surface of the middle joint piece 52 is provided with a stopper 57, and the stopper 57 is used for abutting against both sides of the corresponding left and right section bars when the middle section bar 5 is in a suspended state, so that the section bar 5 does not shake. The lower side of the middle part of the sliding beam 21 is provided with a semicircular positioning part 29 which can transversely limit the turning matching sleeve 58 and can play a role in determining the height after the turning matching sleeve 58 turns and falls, so that the lengthened middle platform 5 can be supported while the height is determined.

The two sides of the section bar used by each table top are symmetrically embedded with spur racks for the use of matched auxiliary equipment, and the two sides of the through long matching groove are symmetrically provided with two guide sliding grooves 15 for assembly with guide sliding rails 28 on the connecting seat 22 during assembly.

In order to facilitate the carrying, handles 6 are respectively arranged at the two ends of the supporting foot stool 2. The base part of the handle 6 is transversely provided with a shaft sleeve hole 61, wherein the shaft sleeve hole of the handle 6 at one end is assembled with a transverse wheel shaft 62, and two ends of the wheel shaft 62 are respectively provided with a roller 63.

Deformation and application between the various states:

referring to all the drawings, the original part of the support operation table top 1, which is formed by splicing a left table top 3 and a right table top 4, is combined with a guide slide rail 28 on a connecting seat 22 through a guide chute 15 on the bottom surface of an aluminum section bar, the support operation table top 1 is movably assembled on a support foot rest 2, and the lengthened part of the support operation table top 1 is formed by a middle table top 5;

when the aluminum table top bracket is lengthened, the latch hooks of the elastic hanging buckles 35 of the inner connecting pieces 12 butted together at the middle parts of the original parts of the bracket operation table top 1 are only needed to be loosened and unlocked, the left table top and the right table top are respectively moved to two sides to give way to the position of the middle table top 5, the middle table top 5 is turned over for 180 degrees around the sliding beam 21, the sliding beam 21 is embedded into the full-length matching groove of the middle table top 5, the height is controlled by the semicircular positioning piece 29, the middle table top is leveled with the left table top and the right table top, the moved left table top and the right table top are pushed to the middle table top 5, the inner connecting piece 12 of the left table top 2 is butted with the middle connecting piece 52 of the middle table top 5, the inner connecting piece 12 of the right table top 3 is butted with the middle connecting piece 52 of the middle table top 5, and the latch hooks of the elastic hanging buckles 35 are hooked in place, so that the lengthening function is completed.

When two aluminum table supports are connected with each other, only the outer connector 13 of the left table 2 of one aluminum table support is butted with the outer connector 13 of the right table 3 of the other aluminum table support, the aluminum table supports are guided by the pin columns to be inserted into the pin grooves and pushed to the right, the lock pin 48 at the other end is hooked and locked by the lock hook 47 at one end of the bottom surface, and the working surface is connected and locked by the butt lock catch 45.

When the aluminium mesa support needs to be folded, fold the undercarriage to the middle part of support operation mesa 1 and draw in, fold the back that targets in place, the undercarriage clings in the straight rack inslot of the side of mesa 5, laminates with the straight rack mutually, can keep fold condition, drags the handle 6 that does not have the wheel end this moment, and the wheel can roll on ground, makes things convenient for the removal of aluminium mesa support, alleviates the amount of labour.

When the two aluminum table supports need to be folded and combined, the two folded aluminum table supports are aligned in the length direction, different ends are placed in a staggered mode, after the working surfaces of the middle table surfaces 5 of the two aluminum table supports are mutually attached to be flat, the lock hooks of the back-connected lock catches 46 mutually buckle the lock pin plates of the back-connected lock catches 46 to be locked and firmly buckled, and the folding and combining of the two aluminum table supports are completed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. The utility model provides an aluminium mesa support with multiple combination mode, its characterized in that, includes two parts of support operation mesa (1), support foot rest (2) of aluminium material, and support operation mesa (1) includes left mesa (3) and right mesa (4) and is located well mesa (5) that are used for the whole mesa of extension after the joint between left mesa (3) and right mesa (4), and the both sides of each mesa all are inlayed and are equipped with the spur rack.

2. The aluminum table top stand with various combinations as set forth in claim 1, wherein the left table top (3) and the right table top (4) each comprise: the table top section bar comprises a table top section bar (11), an inner connector (12) fixedly connected with one end of the inner side of the table top section bar (11), and an outer connector (13) fixedly connected with one end of the outer side of the table top section bar (11).

3. The aluminum table top bracket with multiple combinations according to claim 2, characterized in that the outer end face of the inner joint (12) is provided with two first pins (31), a second pin (33) and two first pin grooves (32), a second pin groove (34); the first pin column (31) and the first pin groove (32) are horizontally arranged and close to the table top, and the second pin column (33) and the second pin groove (34) are horizontally arranged and relatively far away from the table top; the first pin column (31) and the first pin groove (32) are hollow, an elastic hanging buckle (35) is arranged in the first pin column and the first pin groove, the bottom of the elastic hanging buckle (35) is fixed, and a handle part which is opened and pressed is arranged in the middle of the elastic hanging buckle (35); the connecting surface of the outer joint piece (13) is provided with a convex third pin column (41), a convex fourth pin column (43), two concave third pin grooves (42) and a concave fourth pin groove (44); clamping parts (35K) for connecting the hooks of the elastic hanging buckles (35) are respectively arranged in the first pin column (31) and the first pin groove (32).

4. The aluminum table support with multiple combination modes as claimed in claim 2, wherein a lock hook (47) and a lock column (48) with matched models are arranged below the outer connector (13) in the left table (3), and a long lock catch (46) is arranged on the outer end surface of the left table; a lock hook (47) and a lock column (48) which are matched in model are also arranged below the outer connector (13) in the right table top (4), and the upper surface of the right table top is provided with a butt lock catch (45).

5. The aluminum table top bracket with various combinations as claimed in claim 4, wherein the upper surface of the outer joint member (13) in the left table top (3) is further provided with a first latch hook connecting part (45 b) for connecting the latch hook of the butt latch (45); the end surface of the outer connector (13) in the right table top (4) is provided with a second lock hook connecting part (46 b) for connecting the lock hook of the long lock buckle (46).

6. The aluminum table support with multiple combination modes as claimed in claim 1, wherein the supporting foot frame (2) comprises a sliding beam (21) in the middle, two connecting seats (22) respectively arranged at two ends of the sliding beam (21), and a foot bar mounting seat (23) for mounting the connecting seats (22); t-shaped sliding rails (28) are symmetrically arranged on two sides of the connecting seat (22); the foot rod mounting seat (23) is composed of a middle plate, an upper plate and side plates on two sides, a foot rod (24) is hinged to each side plate, a positioning hole with the same center of circle is formed in the position, below a hinged joint, of each foot rod (24) and the side plates, and a locking mechanism (25) is matched in the positioning hole.

7. The aluminum table support with various combinations according to claim 6, wherein the middle table (5) comprises a middle section bar (51) hung on the sliding beam (21), two middle joint pieces (52) fixedly connected with two ends of the middle section bar (51), and a turning fit sleeve (58) arranged in the middle of the middle section bar (51).

8. The aluminum table support with various combinations according to claim 7, wherein the middle section bar (51) is provided with a full-length matching groove matching the width of the sliding beam (21), two guide sliding grooves (15) are symmetrically arranged on two sides of the full-length matching groove, a stopper (57) is arranged on the bottom surface of the middle joint part (52), and a semicircular positioning piece (29) which can transversely limit the turning matching sleeve (58) and can be lifted to a certain height after the turning matching sleeve (58) is turned and falls is arranged on the lower side of the middle part of the sliding beam (21).

9. The aluminum table support with various combinations as claimed in claim 1, wherein the two ends of the supporting leg frame (2) are respectively provided with a handle (6), the base part of the handle (6) is provided with a shaft sleeve hole (61) in the transverse direction, the shaft sleeve hole of the handle (6) at one end is provided with a transverse wheel shaft (62), and the two ends of the wheel shaft (62) are respectively provided with a roller (63).

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