CN215441332U - Dowel bar placing device - Google Patents
Dowel bar placing device Download PDFInfo
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- CN215441332U CN215441332U CN202121839157.5U CN202121839157U CN215441332U CN 215441332 U CN215441332 U CN 215441332U CN 202121839157 U CN202121839157 U CN 202121839157U CN 215441332 U CN215441332 U CN 215441332U
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Abstract
The application discloses dowel bar placer relates to the technical field of pavement concrete construction equipment. The clamping device comprises a main support frame, a vibration motor arranged at the top of the main support frame, handheld rods arranged at two ends of the main support frame and a plurality of clamping assemblies arranged at the bottom of the main support frame; when the dowel bar placing device is used for pavement construction, firstly concrete is paved on a pavement to the thickness of the plate, then the concrete is vibrated, then strip ramming and slurry lifting are carried out, and finally the dowel bars are paved on the pavement at intervals, a constructor holds the handheld bar by hand to lift the dowel bar placing device, abuts the same group of clamping assemblies on the dowel bars at corresponding positions, and starts a vibration motor to compact the dowel bars to an appointed depth; the construction process is reduced, and the construction efficiency is improved; the influence of the vibrating and pulp extracting processes on the position of the dowel bar is effectively avoided, and the accuracy of the position of the dowel bar is effectively improved.
Description
Technical Field
The application relates to the technical field of pavement concrete construction equipment, in particular to a dowel bar placing device.
Background
The dowel bars refer to round steel bars which are arranged at the center of the plate thickness at certain intervals along the transverse joint of the cement concrete pavement plate. The method has the functions of transmitting the traveling load between two road slabs, preventing slab staggering and increasing the stress transmission between adjacent concrete blocks so as to prevent the uneven settlement of the concrete pavement caused by large local stress of the concrete pavement.
At present, in the construction process of the concrete pavement of an airport, the commonly adopted construction sequence is as follows: (1) paving concrete on the pavement to 1/2 plate thickness; (2) placing a dowel bar; (3) paving concrete on the pavement to reach the thickness of the plate; (4) vibrating the concrete; (5) and (5) compacting and extracting slurry. However, the construction process is complicated, the on-site construction is delayed, the concrete is seriously dehydrated, the surface making is not easy to control, and the vibration and slurry lifting process can cause the displacement of the placed dowel bar, so that the position accuracy of the dowel bar is influenced.
In view of the above-mentioned related art, the inventors consider that there are drawbacks that the construction period is long and the dowel bar is easily displaced.
SUMMERY OF THE UTILITY MODEL
In order to improve the efficiency of construction of road surface construction to improve the degree of accuracy of dowel steel location, this application provides a dowel steel placer.
The application provides a dowel bar placer adopts following technical scheme:
a dowel bar placing device comprises a main support frame, wherein the main support frame comprises two support bars which are arranged in parallel at intervals along the horizontal direction;
the middle positions of the tops of the two support rods are fixedly connected with a vibration motor together;
one ends of the two support rods corresponding to each other are fixedly connected with handheld rods together, and the handheld rods are perpendicular to the support rods along the horizontal direction;
the utility model discloses a support frame, including support frame, bracing piece, support frame bottom interval is provided with a plurality of centre gripping subassemblies, the centre gripping subassembly includes two connecting rods that set up relatively respectively on two bracing pieces, the connecting rod sets up along vertical direction to the equal fixedly connected with clamping jaw of one end that the connecting rod deviates from the bracing piece.
By adopting the technical scheme, when the pavement is constructed, firstly concrete is paved on the pavement to the thickness of the plate, then the concrete is vibrated, then the strip ramming is carried out to extract the slurry, and finally the dowel bars are paved on the pavement at intervals, so that the distance between two adjacent dowel bars is equal to the distance between two adjacent clamping assemblies; two constructors commonly hold the hand-held rods on two sides of the main support frame by hands to lift the dowel bar placing device, butt two clamping jaws in the same group of clamping assemblies on the dowel bars at corresponding positions, start the vibration motor and compact the dowel bars to a specified depth; when the dowel bar placing device is used for road surface construction, the construction procedures are reduced, and the construction efficiency is improved; the influence of the vibrating and pulp extracting processes on the position of the dowel bar is effectively avoided, and the accuracy of the position of the dowel bar is effectively improved.
Preferably, the support rod is provided with a sliding groove, and the track direction of the sliding groove is arranged along the axis direction of the support rod;
one end of the connecting rod, which faces the supporting rod at the corresponding position, is fixedly connected with a sliding block, and the sliding block is connected in a sliding groove at the corresponding position in a sliding manner;
and each support rod is provided with a limiting component for limiting the sliding block to move along the sliding groove track direction.
By adopting the technical scheme, the support rod is provided with the sliding groove, the sliding block is connected in the sliding groove in a sliding manner and fixedly connected with the connecting rod, and the sliding block drives the connecting rod to reciprocate along the axis direction of the support rod while reciprocating along the track direction of the sliding groove, so that the distance between two adjacent groups of clamping assemblies is changed; the position of the clamping component can be fixed by arranging the limiting component; the distance of the clamping assembly is convenient to adjust according to the distance between two adjacent dowel bars, and the application range is enlarged.
Preferably, the limiting assembly comprises a plurality of positioning holes formed in the support rod, the positioning holes are communicated with the sliding groove, and the positioning holes are arranged at intervals along the axial direction of the support rod;
the limiting assembly further comprises a limiting bolt in threaded connection with the sliding block, and the axis direction of the limiting bolt is parallel to the axis direction of the positioning hole;
when the sliding block moves to any position along the sliding groove track direction, the limiting bolt penetrates through the positioning hole at the corresponding position and then is in threaded connection with the sliding block.
By adopting the technical scheme, when the distance between the adjacent clamping assemblies is adjusted, the limiting bolt in threaded connection with the sliding block is detached, the connecting rod is moved along the track direction of the sliding groove, and after the connecting rod is moved to a preset position, the limiting bolt penetrates through the positioning hole at the corresponding position and is in threaded connection with the sliding block, so that the movement of the sliding block and the connecting rod is limited; simple structure is convenient for operate to it is fixed with the bracing piece through the mode of bolt fastening, has improved the fixed strength of sliding block and bracing piece greatly.
Preferably, a synchronizing rod is fixedly connected between the two sliding blocks which are correspondingly arranged with the two connecting rods in the same group of clamping assemblies.
Through adopting above-mentioned technical scheme, set up the synchronizing bar between two sliding blocks that correspond the setting with two connecting rods in the centre gripping subassembly of the same group, when adjusting the distance between the adjacent centre gripping subassembly, only need promote the removal of synchronizing bar alright two connecting rods in the centre gripping subassembly of the same group simultaneously control, both improved the synchronism between two connecting rods in the centre gripping subassembly of the same group, improved the efficiency of construction again.
Preferably, the connecting rod is a rod with a telescopic length.
Through adopting above-mentioned technical scheme, connecting rod self length is scalable, is convenient for adjust the length of connecting rod according to the degree of depth of burying underground of dowel steel, has both improved dowel steel placer's application scope, has improved the degree of accuracy of dowel steel along the ascending position in vertical direction when placing the dowel steel again.
Preferably, the connecting rod comprises a first external thread rod arranged on the supporting rod, and the first external thread rod is provided with an external thread;
one end of the first external thread rod, which is far away from the supporting rod, is provided with a bidirectional internal thread pipe, and one end of the bidirectional internal thread pipe, which faces the first external thread rod, is provided with an internal thread in threaded connection with the first external thread rod;
one end of the bidirectional internal threaded pipe, which is far away from the first external threaded rod, is provided with an internal thread with the opposite direction to the thread direction of the first external threaded rod; one end of the bidirectional internal threaded pipe, which deviates from the first external threaded rod, is in threaded connection with a second external threaded rod.
By adopting the technical scheme, the connecting rod comprises a bidirectional internal threaded pipe, and a first external threaded rod and a second external threaded rod which are respectively in threaded connection with two ends of the bidirectional internal threaded pipe; and the opposite direction of the screw thread of first external screw thread pole and second external screw thread pole sets up, when rotating two-way internal thread pipe, first external screw thread pole and the relative or back of the body removal of carrying on the back of the body of second external screw thread pole, and then change the length of connecting rod, make things convenient for constructor quick adjustment connecting rod length.
Preferably, two ends of each of the two support rods are fixedly connected with extension rods, and the extension rods are arranged along the vertical direction;
the handheld rods are simultaneously fixed on the two extension rods at corresponding positions;
every equal fixedly connected with stiffener between extension bar and the bracing piece that corresponds position department, the stiffener slope sets up.
By adopting the technical scheme, the height of the handheld rod from the ground is increased by the extension rod, repeated stooping of constructors when taking and placing the main support frame is reduced, and the labor amount of the constructors is effectively reduced; and set up the stiffener between extension bar and bracing piece, further improved the joint strength between extension bar and the bracing piece.
Preferably, both ends of the handheld rod are provided with anti-skidding sleeves.
Through adopting above-mentioned technical scheme, the both ends of handheld pole set up the antiskid cover, increase constructor's both hands and the frictional force between the handheld pole, reduce the constructor and get the condition that the main tributary strut drops when putting the main tributary strut, reduce the potential safety hazard.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the pavement construction is carried out, firstly concrete is paved on the pavement to the thickness of the plate, then the concrete is vibrated, then the strip ramming and the slurry lifting are carried out, and finally the dowel bars are paved on the pavement at intervals, so that the distance between two adjacent dowel bars is equal to the distance between two adjacent clamping assemblies; two constructors commonly hold the hand-held rods on two sides of the main support frame by hands to lift the dowel bar placing device, butt two clamping jaws in the same group of clamping assemblies on the dowel bars at corresponding positions, start the vibration motor and compact the dowel bars to a specified depth; when the dowel bar placing device is used for road surface construction, the construction procedures are reduced, and the construction efficiency is improved; the influence of the vibrating and pulp extracting processes on the position of the dowel bar is effectively avoided, and the accuracy of the position of the dowel bar is effectively improved;
2. the support rod is provided with a sliding groove, a sliding block is connected in the sliding groove in a sliding manner and fixedly connected with the connecting rod, and the sliding block reciprocates along the track direction of the sliding groove and simultaneously drives the connecting rod to reciprocate along the axis direction of the support rod so as to change the distance between two adjacent groups of clamping assemblies; the position of the clamping component can be fixed by arranging the limiting component; the distance of the clamping assembly is convenient to adjust according to the distance between two adjacent dowel bars, and the application range is enlarged;
3. connecting rod self length is scalable, is convenient for adjust the length of connecting rod according to the degree of depth of burying underground of dowel steel, has both improved dowel steel placer's application scope, has improved the degree of accuracy of dowel steel along the ascending position in vertical direction when placing the dowel steel again.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present application.
Fig. 2 is a schematic overall structure diagram of a second embodiment of the present application.
Fig. 3 is a schematic cross-sectional structure diagram of a second embodiment of the present application.
Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.
Description of reference numerals: 1. a main supporting frame; 11. a support bar; 12. lengthening a rod; 13. a reinforcing bar; 14. a reinforcing plate; 2. vibrating a motor; 3. a hand-held wand; 31. an anti-slip sleeve; 4. a clamping assembly; 41. a connecting rod; 411. a first externally threaded rod; 412. a bidirectional internally threaded tube; 413. a second outer threaded rod; 42. a clamping jaw; 5. a slipping component; 51. a sliding groove; 52. a sliding block; 53. a synchronization lever; 6. a limiting component; 61. positioning holes; 62. an internally threaded bore; 63. and a limiting bolt.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses dowel bar placer.
Example one
Referring to fig. 1, a dowel bar placing device comprises a main support frame 1, a vibration motor 2 arranged at the top of the main support frame 1, handheld rods 3 arranged at two ends of the main support frame 1, and a plurality of clamping assemblies 4 arranged at the bottom of the main support frame 1 at intervals.
When the pavement construction is carried out, firstly concrete is paved on the pavement to the thickness of the plate, then the concrete is vibrated, then the strip ramming and the slurry lifting are carried out, and finally the dowel bars are paved on the pavement at intervals, so that the distance between two adjacent dowel bars is equal to the distance between two adjacent clamping assemblies 4; two constructors commonly hold the hand-held rods 3 at two sides of the main support frame 1 by hands to lift the dowel bar placing device, abut the clamping component 4 on the dowel bars at corresponding positions, start the vibration motor 2 and compact the dowel bars to a specified depth; when the dowel bar placing device is used for road surface construction, construction procedures are reduced, and construction efficiency is improved; and place the dowel bar at last, effectively avoided the influence of vibration and carry thick liquid process to the dowel bar position, effectively improved the degree of accuracy of dowel bar position.
The main support frame 1 comprises two support rods 11 which are arranged in parallel at intervals along the horizontal direction, and the support rods 11 are round steel pipes; the vibration motor 2 is fixed at the middle position of the tops of the two support rods 11, and the vibration direction of the vibration motor 2 is arranged along the vertical direction; the power line of the vibration motor 2 is wrapped with a waterproof sleeve.
Two ends of the two support rods 11 are fixedly connected with extension rods 12, and the extension rods 12 are arranged along the vertical direction; extension bar 12 is used for fixed handheld pole 3 to highly raising handheld pole 3 makes things convenient for operating personnel to get the height of putting dowel steel placer, reduce constructor and get to bow repeatedly when putting dowel steel placer, reduce constructor's the amount of labour. In order to improve the connection strength between the extension bar 12 and the support bar 11, a reinforcing bar 13 is fixedly connected between the extension bar 12 and the corresponding support bar 11, and the reinforcing bar 13 is obliquely arranged.
The hand-held rod 3 is fixed on two extension rods 12 at the same end of the main support frame 1, and the hand-held rod 3 is simultaneously vertical to the extension rods 12 and the support rods 11; the two ends of the handheld rod 3 are respectively positioned at the outer sides of the two extension rods 12, the two ends of the handheld rod 3 are coaxially and fixedly connected with anti-skidding sleeves 31, each anti-skidding sleeve 31 is made of rubber materials, and a plurality of anti-skidding grooves are formed in the periphery of each anti-skidding sleeve 31 at intervals; when the constructor holds the handheld rod 3, the antiskid sleeve 31 is held by both hands, so that the friction force between both hands of the constructor and the handheld rod 3 is increased, the handheld rod 3 is prevented from falling off, and the construction safety is improved.
The clamping assembly 4 comprises two connecting rods 41, the two connecting rods 41 are respectively and correspondingly fixed on the two support rods 11, and the axis direction of the connecting rods 41 is arranged along the vertical direction; connecting rod 41 deviates from one end fixedly connected with clamping jaw 42 of bracing piece 11, and clamping jaw 42 is "eight" type, and the one end that clamping jaw 42 broad-mouthed deviates from connecting rod 41 and sets up to when two clamping jaws 42 in same centre gripping subassembly 4 jointly butt centre gripping dowel steel, the axis direction perpendicular to bracing piece 11's axis direction sets up of dowel steel.
In order to enhance the connection strength between the connecting rod 41 and the supporting rod 11, the reinforcing plate 14 is welded at the position, corresponding to the connecting rod 41, on the supporting rod 11, the reinforcing plate 14 is a rectangular steel plate, the reinforcing plate 14 is arranged in the length direction along the axis direction of the connecting rod 41, one end of the reinforcing plate 14 in the length direction is welded and fixed with the supporting rod 11, and the side surface of the reinforcing plate 14 is welded and fixed with the circumferential contact position of the connecting rod 41.
The implementation principle of the above embodiment is as follows:
when the pavement construction is carried out, firstly concrete is paved on the pavement to the thickness of the plate, then the concrete is vibrated, then the strip ramming and the slurry lifting are carried out, and finally the dowel bars are paved on the pavement at intervals, so that the distance between two adjacent dowel bars is equal to the distance between two adjacent clamping assemblies 4; two constructors commonly hold the hand-held rods 3 at two sides of the main support frame 1 to lift the dowel bar placing device, abut two clamping jaws 42 in the same group of clamping assemblies 4 on the dowel bars at corresponding positions, start the vibration motor 2 and compact the dowel bars to a specified depth; when the dowel bar placing device is used for road surface construction, construction procedures are reduced, and construction efficiency is improved; and place the dowel bar at last, effectively avoided the influence of vibration and carry thick liquid process to the dowel bar position, effectively improved the degree of accuracy of dowel bar position.
Example two
Referring to fig. 2, a dowel bar placing device is different from embodiment 1 in that a clamping assembly 4 is connected with a main support frame 1 in a sliding manner, and a limiting mechanism for limiting the movement of the clamping assembly 4 is arranged between the main support frame 1 and the clamping assembly 4; and the connecting rod 41 is a rod whose own length is stretchable.
With reference to fig. 3 and 4, a sliding assembly 5 is arranged between the connecting rod 41 and the supporting rod 11 at the corresponding position; the sliding component 5 comprises a sliding groove 51 arranged on one side of the support rod 11 facing the ground, and the track direction of the sliding groove 51 is arranged along the axial direction of the support rod 11; the sliding assembly 5 further comprises a sliding block 52 connected with the sliding groove 51 in a sliding manner, the sliding block 52 is a T-shaped block, and the sliding block 52 is clamped in the sliding groove 51 and moves in a reciprocating manner along the axial direction of the support rod 11 under the guidance of the sliding groove 51; one end and connecting rod 41 fixed connection that sliding block 52 deviates from bracing piece 11, respectively with fixedly connected with synchronizing bar 53 between two sliding block 52 of two connecting rod 41 fixed connection in same centre gripping subassembly 4, synchronizing bar 53 is fixed with two sliding block 52, effectively improved the synchronism of two connecting rod 41 in same centre gripping subassembly 4, and when constructor removed two connecting rod 41 in the same set of centre gripping subassembly 4, only need stir synchronizing bar 53, save adjustment time, improve the efficiency of construction.
The limiting mechanism comprises two groups of limiting assemblies 6, and the two groups of limiting assemblies 6 are respectively arranged on the two support rods 11; the limiting assembly 6 comprises a plurality of positioning holes 61 which are arranged on the side walls of the support rods 11 at intervals, the positioning holes 61 are communicated with the inner walls of the support rods 11, the positioning holes 61 are positioned on the opposite sides of the two support rods 11, and the axial direction of the positioning holes 61 is perpendicular to the support rods 11; an internal threaded hole 62 is formed in one end, facing the positioning hole 61, of each sliding block 52, and the axial direction of the internal threaded hole 62 is parallel to the axial direction of the positioning hole 61; a limit bolt 63 is connected to the sliding block 52 through threads;
when the distance between two adjacent groups of clamping assemblies 4 needs to be adjusted, the limiting bolt 63 is detached from the sliding block 52, two adjacent connecting rods 41 are moved, and when the distance between two adjacent connecting rods 41 meets the requirement, the limiting bolt 63 penetrates through the positioning hole 61 at the corresponding position and then is in threaded connection with the sliding block 52, so that the positions of the connecting rods 41 are kept fixed.
The connecting rod 41 comprises a first externally threaded rod 411, a bidirectional internally threaded tube 412 and a second externally threaded rod 413; one end of the first external threaded rod 411 is fixedly connected with the sliding block 52, one end of the first external threaded pipe departing from the sliding block 52 is in threaded connection with the two-way internal threaded pipe 412, and one end of the two-way internal threaded pipe 412 departing from the first external threaded rod 411 is in threaded connection with the second external threaded rod 413; the first external thread rod 411 and the second external thread rod 413 are oppositely threaded; when the bidirectional internal threaded pipe 412 is relatively rotated, the first external threaded rod 411 and the second external threaded rod 413 simultaneously move toward or away from each other, thereby changing the length of the connecting rod 41. The clamping jaw 42 is fixed to an end of the second externally threaded rod 413 facing away from the bidirectional internally threaded tube 412.
The implementation principle of the above embodiment is as follows:
when the dowel bar placing device is used, a constructor adjusts the distance between the clamping assemblies 4 according to the distance between the dowel bars; adjusting the length of the connecting rod 41 itself according to the predetermined depth of the dowel bar; the application scope of the dowel bar placing device is effectively improved, and the accuracy of the dowel bar placing position is further improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a dowel bar placer which characterized in that: the device comprises a main supporting frame (1), wherein the main supporting frame (1) comprises two supporting rods (11) which are arranged in parallel at intervals along the horizontal direction;
the middle positions of the tops of the two support rods (11) are fixedly connected with a vibration motor (2) together;
one ends of the two support rods (11) corresponding to each other are fixedly connected with a handheld rod (3) together, and the handheld rods (3) are perpendicular to the support rods (11) along the horizontal direction;
support frame bottom interval is provided with a plurality of centre gripping subassemblies (4), centre gripping subassembly (4) include two connecting rods (41) that set up relatively respectively on two bracing pieces (11), connecting rod (41) set up along vertical direction to the equal fixedly connected with clamping jaw (42) of one end that connecting rod (41) deviate from bracing piece (11).
2. A dowel placement device, according to claim 1, wherein: a sliding groove (51) is formed in the supporting rod (11), and the track direction of the sliding groove (51) is arranged along the axis direction of the supporting rod (11);
one end of the connecting rod (41) facing the supporting rod (11) at the corresponding position is fixedly connected with a sliding block (52), and the sliding block (52) is connected in a sliding groove (51) at the corresponding position in a sliding manner;
each support rod (11) is provided with a limiting component (6) for limiting the sliding block (52) to move along the track direction of the sliding groove (51).
3. A dowel placement device, according to claim 2, wherein: the limiting assembly (6) comprises a plurality of positioning holes (61) formed in the supporting rod (11), the positioning holes (61) are communicated with the sliding groove (51), and the positioning holes (61) are arranged at intervals along the axial direction of the supporting rod (11);
the limiting assembly (6) further comprises a limiting bolt (63) in threaded connection with the sliding block (52), and the axial direction of the limiting bolt (63) is parallel to the axial direction of the positioning hole (61);
when the sliding block (52) moves to any position along the track direction of the sliding groove (51), the limiting bolt (63) penetrates through the positioning hole (61) at the corresponding position and then is in threaded connection with the sliding block (52).
4. A dowel placement device, according to claim 2, wherein: and a synchronizing rod (53) is fixedly connected between two sliding blocks (52) which are correspondingly arranged with the two connecting rods (41) in the same group of clamping components (4).
5. A dowel placement device, according to claim 1, wherein: the connecting rod (41) is a rod with a telescopic length.
6. A dowel placement device, according to claim 5, wherein: the connecting rod (41) comprises a first external thread rod (411) arranged on the supporting rod (11), and an external thread is arranged on the first external thread rod (411);
one end of the first external thread rod (411) departing from the supporting rod (11) is provided with a bidirectional internal thread pipe (412), and one end of the bidirectional internal thread pipe (412) facing the first external thread rod (411) is provided with an internal thread in threaded connection with the first external thread rod (411);
one end of the bidirectional internal threaded pipe (412) departing from the first external threaded rod (411) is provided with internal threads in the direction opposite to the thread direction of the first external threaded rod (411); one end of the bidirectional internal threaded pipe (412) departing from the first external threaded rod (411) is connected with a second external threaded rod (413) in a threaded mode.
7. A dowel placement device, according to claim 1, wherein: two ends of each of the two support rods (11) are fixedly connected with an extension rod (12), and the extension rods (12) are arranged along the vertical direction;
the handheld rod (3) is simultaneously fixed on two extension rods (12) at corresponding positions;
every equal fixedly connected with stiffener (13) between extension bar (12) and bracing piece (11) of corresponding position department, stiffener (13) slope sets up.
8. A dowel placement device, according to claim 1, wherein: and anti-skidding sleeves (31) are arranged at the two ends of the handheld rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121839157.5U CN215441332U (en) | 2021-08-07 | 2021-08-07 | Dowel bar placing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121839157.5U CN215441332U (en) | 2021-08-07 | 2021-08-07 | Dowel bar placing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215441332U true CN215441332U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121839157.5U Active CN215441332U (en) | 2021-08-07 | 2021-08-07 | Dowel bar placing device |
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| Country | Link |
|---|---|
| CN (1) | CN215441332U (en) |
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2021
- 2021-08-07 CN CN202121839157.5U patent/CN215441332U/en active Active
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