CN211386368U

CN211386368U - Steel bar marking machine

Info

Publication number: CN211386368U
Application number: CN201922421330.9U
Authority: CN
Inventors: 郑观如; 叶小琼
Original assignee: Xiamen Municipal Engineering Research Institute Co ltd
Current assignee: Xiamen Municipal Engineering Research Institute Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-09-01
Anticipated expiration: 2029-12-28

Abstract

The utility model belongs to the technical field of testing arrangement's technique and specifically relates to a reinforcing bar punctuation machine is related to. Wherein, this kind of reinforcing bar punctuation machine, which comprises a frame, first installation horizontal pole, second installation horizontal pole, a spring, pivot and a plurality of punctuation head, first installation horizontal pole and the relative setting of second installation horizontal pole are in the frame, all have the spaced mounting hole that evenly is equipped with a plurality of confession punctuation head installation on first installation horizontal pole and the second installation horizontal pole, the spring housing is established overhead at the punctuation, and be located between first installation horizontal pole and the second installation horizontal pole, all be equipped with on the punctuation head and stir the arch, be equipped with spiral stirring piece in the pivot, spiral stirring piece drives the motion of punctuation head through stirring the arch when being used for rotating. The utility model discloses has following effect: 1. the problem that the impact on the steel bars is large and the marking is unclear due to the fact that a plurality of marking heads fall down to mark the steel bars at the same time is solved; 2. the use feeling of the operators is better; 3. the motion of the marking head is relatively accurate.

Description

Steel bar marking machine

Technical Field

The utility model belongs to the technical field of testing arrangement's technique and specifically relates to a reinforcing bar punctuation machine is related to.

Background

At present, various experiments are required to be carried out on engineering structures during construction so as to ensure that the experiments meet expected requirements according to quality, and a steel bar marking machine is used for marking point marks on round steel, flat steel, steel pipes, section steel and other non-ferrous metal materials and is used for tensile samples.

The existing marking machine adopts an integral marking machine, and the working principle is as follows: and marking the steel bars by simultaneously dropping a plurality of marking heads.

The above prior art solutions have the following drawbacks: a plurality of marking heads fall down simultaneously to mark the reinforcing steel bars, so that the impact on the reinforcing steel bars is large, and the marking points are not clear.

Disclosure of Invention

Not enough to prior art exists, the utility model aims at providing a reinforcing bar punctuation machine, the technical problem that solve is: how to solve a plurality of marking heads drop simultaneously with the reinforcing bar marking cause to the great and unclear problem of marking of impact to the reinforcing bar.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model discloses a reinforcing bar punctuating machine, including frame, connecting block, first installation horizontal pole, second installation horizontal pole, spring, pivot, supporting baseplate, putting thing device and a plurality of punctuating head, a plurality of punctuating head all mobilizable setting is in the frame, the quantity of connecting block is two, two connecting blocks rotatable setting respectively are in the relative both sides of frame, the one end of first installation horizontal pole and second installation horizontal pole all with a connecting block fixed connection, and the other end all with another connecting block fixed connection; a pressing handle is arranged on the second mounting cross rod; the first installation cross rod and the second installation cross rod are arranged oppositely, a plurality of installation holes for installing the marking heads are uniformly arranged on the first installation cross rod and the second installation cross rod at intervals, the marking heads are connected with the installation holes in a sliding mode, and the number of the installation holes is the same as that of the marking heads and corresponds to that of the marking heads one by one; the springs are sleeved on the punctuation heads and are positioned between the first installation cross rods and the second installation cross rods, and the number of the springs is the same as that of the punctuation heads and corresponds to that of the punctuation heads one by one; the rotating shaft is rotatably arranged on the rack, shifting protrusions are arranged on the marking heads, a spiral shifting piece is arranged on the rotating shaft, the spiral shifting piece is used for driving the marking heads to move through the shifting protrusions when rotating, and a rotating handle is arranged at the end part of the rotating shaft; the article placing device comprises article placing blocks and a driving assembly, the article placing blocks are movably arranged on the supporting base plate, U-shaped grooves for bearing reinforcing steel bars are formed in the article placing blocks, the number of the article placing blocks is two, and the two article placing blocks can be relatively close to or far away from each other; the driving component is used for driving the object placing block to relatively approach or move away.

By adopting the technical scheme, when the steel bar needs to be marked, the distance between the two object placing blocks is adjusted according to the length of the steel bar, then the steel bar is placed in the U-shaped grooves of the two object placing blocks, the contact area between the object placing blocks and the steel bar is increased due to the U-shaped grooves because the steel bar is approximately cylindrical, the steel bar is placed on the object placing blocks more stably, after the steel bar is placed, an operator holds the pressing handle to enable the first installation cross bar and the second installation cross bar to rotate until the lower ends of the marking point heads installed on the first installation cross bar and the second installation cross bar abut against the steel bar, and the force application area of the operator is increased due to the pressing handle, so that the use feeling of the operator is good; when the lower extreme at the punctuation head all offsets with the reinforcing bar, rotate and rotate the handle so that the pivot rotates, the epaxial spiral of commentaries on classics this moment is stirred the piece and can be dialled in proper order and be makeed the punctuation head in proper order so that the punctuation head rises in proper order, then by the punctuation head of stirring again descend in proper order to the reinforcing bar punctuation under the effect of spring, thereby a plurality of punctuation head can rise in proper order and descend to the reinforcing bar punctuation, and can not descend simultaneously to the reinforcing bar punctuation, so this reinforcing bar punctuation machine has solved that a plurality of punctuation heads fall simultaneously and have caused the great and unclear problem of punctuation of impact to the reinforcing bar.

The present invention may be further configured in a preferred embodiment as: the driving assembly comprises a bidirectional screw, a first moving sleeve and a second moving sleeve, the bidirectional screw is provided with a first screw section and a second screw section, the threads of the first screw section and the second screw section are opposite, the first moving sleeve is sleeved on the first screw section in a threaded manner, and the second moving sleeve is sleeved on the second screw section in a threaded manner; the fixed block is provided with a limiting piece for limiting the first moving sleeve and the second moving sleeve, so that the first moving sleeve and the second moving sleeve are driven to move along the length direction of the bidirectional screw rod; one object placing block is fixedly connected with the first movable sleeve, and the other object placing block is fixedly connected with the second movable sleeve; the lower end of the object placing block is in contact with the upper end of the fixing block and is connected with the fixing block in a sliding mode.

By adopting the technical scheme, the first moving sleeve and the second moving sleeve can move along the length direction of the bidirectional screw under the action of the limiting part, the first moving sleeve and the second moving sleeve are respectively sleeved on the first screw end and the second screw section of the bidirectional screw, and the threads of the first screw section and the second screw section are opposite, so that the first moving sleeve and the second moving sleeve can correspondingly approach or keep away when the bidirectional screw rotates along different directions.

The present invention may be further configured in a preferred embodiment as: the limiting part is a limiting groove, and the first movable sleeve, the second movable sleeve and the bidirectional screw are all arranged in the limiting groove.

Through adopting above-mentioned technical scheme, the spacing groove has spacing effect, because first removal cover and second remove the cover and all set up at the spacing inslot, so first removal cover and second remove the cover and can not follow two-way screw rod and rotate together when two-way screw rod rotates, only can follow the length direction motion of two-way screw rod under the effect of spacing groove to the spacing groove has just realized removing the spacing of cover and second removal cover. Meanwhile, the bidirectional screw is arranged in the limiting groove, the bidirectional screw is not easy to collide and damage, and the service life of the bidirectional screw is prolonged.

The present invention may be further configured in a preferred embodiment as: the two ends of the bidirectional screw rod are connected with the groove walls of the mounting grooves through the bearings.

Through adopting above-mentioned technical scheme, the friction when the bearing can reduce two-way screw rod and rotate to the rotation of two-way screw rod is comparatively smooth and easy.

The present invention may be further configured in a preferred embodiment as: still include the regulation handle, adjust the handle with two-way screw rod fixed connection.

Through adopting above-mentioned technical scheme, adjust the handle and increased operation personnel's application of force area, operation personnel's use is felt better.

The present invention may be further configured in a preferred embodiment as: the first moving sleeve and/or the second moving sleeve are/is connected with the object placing block through screws.

Through adopting above-mentioned technical scheme, the screw is common connecting device, and the model is various, easily purchases and uses.

The present invention may be further configured in a preferred embodiment as: the top of mark point head is equipped with the stop collar, the stop collar with the top threaded connection of mark point head.

Through adopting above-mentioned technical scheme, the mark head is difficult for deviating from the mounting hole under the effect of gravity, and the mark head is connected more stably with first installation horizontal pole and second installation horizontal pole.

The present invention may be further configured in a preferred embodiment as: the punctuation head is provided with a guide protrusion, the hole wall of the mounting hole is provided with a guide groove, the guide protrusion is inserted into the guide groove, and the guide protrusion is used for moving along the guide groove so as to enable the punctuation head to slide relative to the mounting hole.

Through adopting above-mentioned technical scheme, the direction is protruding to be difficult for the skew when cooperateing with the direction recess and making the motion of punctuation head, and the motion of punctuation head is comparatively accurate.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the problem that the impact on the steel bars is large and the marking is unclear due to the fact that a plurality of marking heads fall down to mark the steel bars at the same time is solved;

2. the bidirectional screw is not easy to collide and damage, and the service life of the bidirectional screw is prolonged;

3. the use feeling of the operators is better;

4. the motion of the marking head is relatively accurate.

Drawings

Fig. 1 is a schematic structural diagram of a steel bar marking machine according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic structural view illustrating a connection between a rotating shaft and a spiral toggle piece according to an embodiment of the present invention.

In the figure, 1, a frame; 2. marking a point head; 3. connecting blocks; 4. a first mounting rail; 5. a second mounting rail; 6. a spring; 7. a rotating shaft; 8. a support base plate; 9. a placement device; 91. placing the object blocks; 92. a U-shaped groove; 93. a drive assembly; 931. a bidirectional screw; 9311. a first helical segment; 9312. a second helical segment; 932. a first moving sleeve; 933. a second movable sleeve; 10. pressing the handle; 11. mounting holes; 12. poking the protrusion; 13. a spiral stirring sheet; 14. rotating the handle; 15. a fixed block; 16. a limiting groove; 17. a bearing; 18. mounting grooves; 19. adjusting the handle; 20. a screw; 21. a limiting sleeve; 22. a guide projection; 23. and a guide groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, for the utility model discloses a reinforcing bar punctuation machine, including frame 1, connecting block 3, first installation horizontal pole 4, second installation horizontal pole 5, spring 6, pivot 7, supporting baseplate 8, put thing device 9 and a plurality of punctuation head 2, the equal mobilizable setting of a plurality of punctuation head 2 is in frame 1. The spacing between two adjacent marking heads 2 may be 5 mm. The quantity of connecting block 3 is two, and two connecting blocks 3 are rotatable setting respectively in the relative both sides of frame 1, and the rotatable connected mode of connecting block 3 and frame 1 can be for articulated. First installation horizontal pole 4 and second installation horizontal pole 5 can be square board, the one end of first installation horizontal pole 4 and second installation horizontal pole 5 all with a connecting block 3 fixed connection, and the other end all with another connecting block 3 fixed connection, and fixed connection mode all can be bolted connection. The second mounting cross rod 5 is provided with a pressing handle 10, the pressing handle 10 can be cylindrical, and the pressing handle 10 and the second mounting cross rod 5 can be connected in a threaded manner. First installation horizontal pole 4 and the relative setting of second installation horizontal pole 5, all have the spaced mounting hole 11 that evenly is equipped with the first 2 installations of a plurality of confession mark on first installation horizontal pole 4 and the second installation horizontal pole 5, and mounting hole 11 can be the circular port, and mark head 2 slides with mounting hole 11 and is connected, and the quantity of mounting hole 11 is the same with the quantity of mark head 2, and the one-to-one.

Preferably, regarding the connection mode that slides of mark point head 2 and mounting hole 11, as shown in fig. 2, mark point head 2 can be last to be equipped with guide protrusion 22, guide protrusion 22 can be square, the corresponding guide groove 23 that can be equipped with of pore wall of mounting hole 11, guide groove 23 is corresponding can be square, guide protrusion 22 inserts guide groove 23, guide protrusion 22 is used for moving along guide groove 23 so that mark point head 2 slides for mounting hole 11, guide protrusion 22 is difficult for squinting when cooperating with guide groove 23 and making the motion of mark point head 2, the motion of mark point head 2 is comparatively accurate.

Meanwhile, as shown in fig. 1, the springs 6 are sleeved on the marking head 2 and located between the first installation cross rod 4 and the second installation cross rod 5, and the number of the springs 6 is the same as that of the marking heads 2 and corresponds to that of the marking heads one by one. Preferably, the top of punctuation head 2 can be equipped with stop collar 21, and stop collar 21 can be the cylinder type, and stop collar 21 and punctuation head 2's top threaded connection, so punctuation head 2 is difficult for deviating from mounting hole 11 under the effect of gravity, and punctuation head 2 is more stable with being connected of first installation horizontal pole 4 and second installation horizontal pole 5. The rotatable setting of pivot 7 is in frame 1, and pivot 7 can be connected for passing through the bearing with the connected mode of frame 1, all is equipped with on the mark head 2 and stirs protruding 12, stirs protruding 12 and can be square, stirs protruding 12 and the connected mode of mark head 2 and can be welding or integrated into one piece. As shown in fig. 1 or fig. 3, the rotating shaft 7 is provided with a spiral toggle piece 13, the connection mode of the spiral toggle piece 13 and the rotating shaft 7 can be welding, the spiral toggle piece 13 is used for driving the pointer 2 to move through the toggle protrusion 12 when rotating, as shown in fig. 1, the end of the rotating shaft 7 is provided with a rotating handle 14, the rotating handle 14 is fixedly connected with the rotating shaft 7, and the fixed connection mode can be welding. The event is after the reinforcing bar is installed, the rotatable handle 14 that rotates of operation personnel is so that pivot 7 rotates, this moment pivot 7 on the spiral stir piece 13 can stir mark point head 2 in proper order so that mark point head 2 rises in proper order, then by the mark point head 2 of stirring drop in proper order under the effect of spring 6 to the reinforcing bar mark point again, thereby a plurality of mark point head 2 can rise in proper order and drop to the reinforcing bar mark point, and can not drop to the reinforcing bar mark point simultaneously, the event is marked the machine and has been solved a plurality of mark point heads 2 and has fallen simultaneously and cause the great and unclear problem of mark point of impact to the reinforcing bar of reinforcing bar mark point.

In addition, as shown in fig. 1, the article placing device 9 includes an article placing block 91 and a driving assembly 93, the article placing block 91 may be a square block, the article placing block 91 is movably disposed on the supporting base plate 8, the article placing block 91 is provided with U-shaped grooves 92 for supporting the reinforcing bars, the number of the article placing blocks 91 is two, and the two article placing blocks 91 can be relatively close to or far away from each other; the driving assembly 93 is used for driving the object placing block 91 to be relatively close to or far away from the object placing block 91, and the contact area between the object placing block 91 and the reinforcing steel bar is increased due to the fact that the reinforcing steel bar is approximately cylindrical, and the reinforcing steel bar is placed on the object placing block 91 more stably. Simultaneously can be close to relatively or keep away from put the punctuation demand that thing piece 91 can match the reinforcing bar of different length, this reinforcing bar punctuation machine commonality is strong.

Regarding the specific arrangement of the driving assembly 93, as shown in fig. 1, the reinforcing steel bar marking machine may further include a fixed block 15, the fixed block 15 may be a square block, the fixed block 15 is fixedly connected to the supporting base plate 8, the fixed connection manner may be a bolt connection or a welding connection, the driving assembly 93 includes a bidirectional screw 931, a first moving sleeve 932 and a second moving sleeve 933, the bidirectional screw 931 has a first screw segment 9311 and a second screw segment 9312, the first screw segment 9311 and the second screw segment 9312 have opposite threads, the first moving sleeve 932 is threadedly sleeved on the first screw segment 9311, and the second moving sleeve 933 is threadedly sleeved on the second screw segment 9312; the fixed block 15 is provided with a limiting member for limiting the first movable sleeve 932 and the second movable sleeve 933, so that the first movable sleeve 932 and the second movable sleeve 933 are driven to move along the length direction of the bidirectional screw 931; one object placing block 91 is fixedly connected with the first movable sleeve 932 by a screw 20, and the other object placing block 91 is fixedly connected with the second movable sleeve 933 by a screw 20. The lower ends of the object placing blocks 91 are contacted with the upper ends of the fixing blocks 15 and are connected with the fixing blocks 15 in a sliding mode.

Preferably, as shown in fig. 1, the limiting member may be a limiting groove 16, the limiting groove 16 may be a square groove, and accordingly, the first moving sleeve 932 and the second moving sleeve 933 may be square blocks, the first moving sleeve 932, the second moving sleeve 933 and the two-way screw 931 are all disposed in the limiting groove 16, the limiting groove 16 has a limiting function, and since the first moving sleeve 932 and the second moving sleeve 933 are all disposed in the limiting groove 16, when the two-way screw 931 rotates, the first moving sleeve 932 and the second moving sleeve 933 cannot rotate together with the two-way screw 931 and only move along the length direction of the two-way screw 931 under the effect of the limiting groove 16, so that the limiting groove 16 realizes limiting of the first moving sleeve 932 and the second moving sleeve 933. Meanwhile, the bidirectional screw 931 is arranged in the limiting groove 16, the bidirectional screw 931 is not easy to collide and damage, and the service life of the bidirectional screw 931 is prolonged. In addition, this reinforcing bar punctuating machine still can include adjusting handle 19, and adjusting handle 19 and two-way screw 931 fixed connection, fixed connection can be bolted connection, and adjusting handle 19 has increased operating personnel's application of force area, and operating personnel uses when rotating two-way screw 931 in order to adjust the interval between two thing pieces 91 and feels better.

Finally, in order to make the rotation of the bidirectional screw 931 smoother, as shown in fig. 2, the steel bar pointing machine may further include a bearing 17, the opposite end walls of the limiting groove 16 are respectively provided with a mounting groove 18 for the bearing 17 to mount, the mounting groove 18 may be correspondingly cylindrical, the two ends of the bidirectional screw 931 are respectively connected with the wall of the mounting groove 18 through the bearing 17, the bearing 17 can reduce the friction force when the bidirectional screw 931 rotates, and thus the rotation of the bidirectional screw 931 is smoother.

The implementation principle of the embodiment is as follows: when the steel bar needs to be marked, the adjusting handle 19 is rotated, so that the bidirectional screw 931 rotates, the first movable sleeve 932 and the second movable sleeve 933 which are sleeved on different screw sections of the bidirectional screw 931 can correspondingly approach or separate away, correspondingly, the two object placing blocks 91 which are fixedly connected with the first movable sleeve 932 and the second movable sleeve 933 can approach or separate away, when the distance between the two object placing blocks 91 is matched with the length of the steel bar, the steel bar is placed in the U-shaped grooves 92 of the two object placing blocks 91, and because the steel bar is approximately cylindrical, the contact area between the object placing blocks 91 and the steel bar is increased by the U-shaped grooves 92, and the steel bar is placed on the object placing blocks 91 more stably. Simultaneously can be close to relatively or keep away from put the punctuation demand that thing piece 91 can match the reinforcing bar of different length, this reinforcing bar punctuation machine commonality is strong.

After the reinforcing steel bars are placed, an operator holds the pressing handle 10 with hands to enable the first mounting cross rod 4 and the second mounting cross rod 5 to rotate until the lower ends of the marking heads 2 mounted on the first mounting cross rod 4 and the second mounting cross rod 5 are abutted against the reinforcing steel bars, and the pressing handle 10 increases the force application area of the operator, so that the use feeling of the operator is good; when the lower extreme of punctuation head 2 all offsets with the reinforcing bar, rotate rotation handle 14 so that pivot 7 rotates, the epaxial spiral of pivot 7 this moment is dialled piece 13 and can be dialled punctuation head 2 in proper order so that punctuation head 2 rises in proper order, then by the punctuation head 2 of stirring drop in proper order under the effect of spring 6 again to the reinforcing bar punctuation, thereby a plurality of punctuation head 2 can rise in proper order and fall to the reinforcing bar punctuation, and can not fall to the reinforcing bar punctuation simultaneously, so this reinforcing bar punctuation machine has solved that a plurality of punctuation heads 2 fall simultaneously and has fallen down the great and unclear problem of punctuation of impact to the reinforcing bar that causes the reinforcing bar punctuation.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a reinforcing bar punctuation machine, includes frame (1) and a plurality of punctuation head (2), and a plurality of punctuation head (2) all mobilizable setting is in on frame (1), its characterized in that: the device comprises a connecting block (3), a first mounting cross rod (4), a second mounting cross rod (5), a spring (6), a rotating shaft (7), a supporting bottom plate (8) and an object placing device (9);

the number of the connecting blocks (3) is two, the two connecting blocks (3) are respectively rotatably arranged on two opposite sides of the rack (1), one ends of the first mounting cross rod (4) and the second mounting cross rod (5) are fixedly connected with one connecting block (3), and the other ends of the first mounting cross rod and the second mounting cross rod are fixedly connected with the other connecting block (3); a pressing handle (10) is arranged on the second mounting cross rod (5);

the first installation cross rod (4) and the second installation cross rod (5) are oppositely arranged, a plurality of installation holes (11) for installing the marking heads (2) are uniformly formed in the first installation cross rod (4) and the second installation cross rod (5) at intervals, the marking heads (2) are connected with the installation holes (11) in a sliding mode, and the number of the installation holes (11) is the same as that of the marking heads (2) and corresponds to that of the marking heads one by one;

the springs (6) are sleeved on the marking heads (2) and are positioned between the first mounting cross rods (4) and the second mounting cross rods (5), and the number of the springs (6) is the same as that of the marking heads (2) and corresponds to that of the marking heads one by one;

the rotating shaft (7) is rotatably arranged on the rack (1), the marking heads (2) are respectively provided with a poking protrusion (12), the rotating shaft (7) is provided with a spiral poking piece (13), the spiral poking pieces (13) are used for driving the marking heads (2) to move through the poking protrusions (12) when rotating, and the end parts of the rotating shaft (7) are provided with rotating handles (14);

the article placing device (9) comprises article placing blocks (91) and a driving assembly (93), the article placing blocks (91) are movably arranged on the supporting base plate (8), U-shaped grooves (92) for bearing reinforcing steel bars are formed in the article placing blocks (91), the number of the article placing blocks (91) is two, and the two article placing blocks (91) can be relatively close to or far away from each other;

the driving component (93) is used for driving the object placing block (91) to relatively approach or move away.

2. A rebar marking machine as claimed in claim 1 wherein: the driving assembly (93) comprises a bidirectional screw (931), a first moving sleeve (932) and a second moving sleeve (933), the bidirectional screw (931) is provided with a first screw section (9311) and a second screw section (9312), the first screw section (9311) and the second screw section (9312) are opposite in screw thread, the first moving sleeve (932) is sleeved on the first screw section (9311) in a screw thread manner, and the second moving sleeve (933) is sleeved on the second screw section (9312) in a screw thread manner;

the fixed block (15) is provided with a limiting piece for limiting the first moving sleeve (932) and the second moving sleeve (933), so that the first moving sleeve (932) and the second moving sleeve (933) are driven to move along the length direction of the bidirectional screw (931);

one object placing block (91) is fixedly connected with the first movable sleeve (932), and the other object placing block (91) is fixedly connected with the second movable sleeve (933);

the lower end of the object placing block (91) is in contact with the upper end of the fixed block (15) and is connected with the fixed block (15) in a sliding mode.

3. A rebar marking machine as claimed in claim 2 wherein: the limiting piece is a limiting groove (16), and the first movable sleeve (932), the second movable sleeve (933) and the bidirectional screw (931) are all arranged in the limiting groove (16).

4. A rebar marking machine as claimed in claim 3 wherein: still include bearing (17), the relative both ends cell wall of spacing groove (16) all is equipped with mounting groove (18) that supply bearing (17) to install, the both ends of two-way screw rod (931) all through bearing (17) with the cell wall of mounting groove (18) is connected.

5. A steel bar marking machine according to claim 4, characterized in that: the adjusting handle (19) is further included, and the adjusting handle (19) is fixedly connected with the bidirectional screw rod (931).

6. A steel bar marking machine according to claim 5, characterized in that: the device also comprises a screw (20), and the first moving sleeve (932) and/or the second moving sleeve (933) are connected with the object placing block (91) through the screw (20).

7. A rebar marking machine as claimed in any one of claims 1 to 6 wherein: the top of marking point head (2) is equipped with stop collar (21), stop collar (21) with the top threaded connection of marking point head (2).

8. A rebar marking machine as claimed in claim 7, wherein: be equipped with direction arch (22) on mark point head (2), the pore wall of mounting hole (11) is equipped with guide groove (23), guide arch (22) insert guide groove (23), guide arch (22) are used for along guide groove (23) motion so that mark point head (2) for mounting hole (11) slide.