Concrete guardrail joint cutting device

Abstract

The utility model discloses a concrete guardrail joint cutting device which comprises a positioning part, a movable guide part and a cutting machine, the positioning part comprises two parallel guide rails arranged at intervals, and the upper ends of the two guide rails are bent to form hooks and can be hung on a concrete guardrail; the movable guide part comprises a guide rod and a cutting guide frame located below the guide rod, the guide rod is slidably connected to the guide rail, and the top end of the cutting guide frame is hinged to the guide rod and can vertically slide along the guide rail along with the guide rod; and the head of the cutting machine is clamped on the cutting guide frame to cut the false seam along with the vertical movement of the cutting guide frame. The cutting guide frame can fix the cutting machine, the guide rail is used for guiding the joint cutting path of the cutting machine, the cutting angle of the cutting machine can be adjusted through hinge joint of the cutting guide frame and the guide rod, and a cut false joint is straight and attractive; the problems that when a worker holds a cutting machine by hand to conduct joint cutting operation in the prior art, joint cutting is not smooth and the joint cutting depth cannot reach the ideal state due to shaking of the hand are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of bridge ancillary engineering construction technology, and more specifically to a concrete guardrail cutting device. Background Technology

[0002] Concrete railings typically utilize dummy joints to prevent irregular cracks from forming in the concrete due to temperature changes, shrinkage, and expansion. Dummy joints should generally be installed every 5-8 meters in cast-in-place concrete railings, with a width and depth of 2-3 millimeters.

[0003] In actual construction, workers typically use hand-held cutting machines to cut dummy joints after the guardrail formwork is removed. However, during concrete guardrail construction, the dummy joints are often not cut in time, leading to irregular cracks on the concrete guardrail surface, resulting in a decline in construction quality or rework. Furthermore, hand tremors during the cutting process often cause the cuts to be skewed, affecting the guardrail's aesthetics and resulting in poor appearance.

[0004] Therefore, how to provide a concrete guardrail cutting device that can effectively guarantee the quality and aesthetics of guardrail cutting and improve the quality of guardrail construction is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a concrete guardrail cutting device. The positioning part hangs the device on the guardrail, and the cutting machine is positioned by the moving guide part. The moving guide part drives the cutting machine to move up and down along the guide rail of the positioning part to complete the dummy joint cutting, which effectively solves the problem of uneven cutting caused by the operator's hand shaking, which affects the aesthetics of the guardrail.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A concrete guardrail cutting device, comprising:

[0008] The positioning part includes two parallel and spaced guide rails. The axes of the two guide rails are parallel to the height direction of the concrete guardrail and their upper ends are bent to form hooks that can be attached to the concrete guardrail.

[0009] A movable guide unit includes a guide rod and a cutting guide frame located below the guide rod. The two ends of the guide rod are slidably connected to the opposite side walls of the two guide rails. The top end of the cutting guide frame is hinged to the guide rod and can slide up and down along the two guide rails with the guide rod.

[0010] A cutting machine, the head of which is engaged with the cutting guide to move up and down with it to cut dummy seams.

[0011] The beneficial effects of this utility model are that the guide rail, when attached to the concrete guardrail, can guide the path of the dummy seam cutting. The cutting machine is positioned by the cutting guide frame, and the cutting machine moves up and down by the movement of the guide rod, thereby realizing the cutting operation of the seam. During the cutting process, the cutting path is straight and stable, and there will be no change in the path, ensuring that the cut dummy seam is straight and beautiful.

[0012] Preferably, the movable guide further includes a connector; the guide rod is a square rod, and the cutting guide frame is a rectangular frame; one end of the connector is fixed to the middle of the bottom surface of the square rod, and the other end is hinged to the top of the rectangular frame; the head of the cutting machine is engaged within the frame of the rectangular frame. The rectangular frame-type cutting guide frame is hinged to the guide rod via the connector, and by rotating the cutting guide frame, the cutting angle of the cutting machine can be adjusted to ensure smooth slit cutting.

[0013] Preferably, the device further includes a snap-fit ​​connector, which is fixed to the side of the rectangular frame away from the concrete guardrail to engage the head of the cutting machine. A positioning bolt is screwed onto the snap-fit ​​connector to adjust the distance between the cutting machine and the concrete guardrail and to fix their position. The saw blade of the cutting machine is arranged perpendicular to the outer surface of the concrete guardrail. The cutting machine is fixed to the rectangular cutting guide frame by the snap-fit ​​connector, and the distance between the cutting machine and the concrete guardrail can be adjusted by the positioning bolt to ensure that the cutting depth meets the requirements.

[0014] Preferably, both ends of the guide rod and the cutting guide frame are rotatably connected to guide wheels, which are rolled on the guide rail. The guide wheels enable the guide rod and the cutting guide frame to move synchronously up and down along the guide rail, facilitating the dummy joint cutting operation on the top and inner surfaces of the concrete guardrail.

[0015] Preferably, the positioning part further includes a limiting rod and a connecting rod. The two ends of the limiting rod are respectively fixed to the opposite side walls of the upper ends of the two guide rails; the two ends of the connecting rod are respectively fixed to the opposite side walls of the ends of the two guide rails. The connecting rod connects the two guide rails to form a U-shaped bracket, and the limiting rod prevents the guide rod from slipping off the guide rails.

[0016] Preferably, the system also includes multiple positioning posts. One end of each positioning post is vertically fixed to the side wall of the guide rail facing the concrete guardrail, while the other end can abut against the outer surface of the concrete guardrail. The positioning posts contacting the surface of the concrete guardrail prevents the guide rail from making hard contact with the concrete, thus avoiding any impact on the appearance of the concrete guardrail.

[0017] Preferably, the outer periphery of the positioning post is covered with a rubber pad. The rubber pad enables flexible contact between the cutting device and the concrete guardrail, preventing damage to the concrete appearance of the guardrail during the installation, removal, or movement of the cutting device.

[0018] Preferably, the device further includes a reinforcing section comprising horizontal bars and vertical bars; one end of each of the horizontal bars is fixed to a side wall of the guide rail away from the guide rod, and the vertical bars are arranged parallel to the guide rail, with their side walls fixed to the other ends of the horizontal bars. The reinforcing section ensures the rigidity of the cutting device, thereby guaranteeing its continued use and extending its service life.

[0019] Preferably, the shape of the positioning part is adapted to the cross-sectional shape of the concrete guardrail.

[0020] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a concrete guardrail cutting device. The cutting guide frame can fix the cutting machine. The cutting guide frame moves up and down along the guide rail with the guide rod to realize the dummy cut operation. The guide rail guides the cutting path of the cutting machine. The hinge between the cutting guide frame and the guide rod can adjust the cutting angle of the cutting machine. This utility model device is simple, highly mobile, and produces straight and beautiful dummy cuts. It effectively solves the problem that the traditional hand-held cutting machine operation is prone to uneven cutting and the cutting depth cannot reach the ideal state due to hand shaking. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A schematic diagram of the guardrail cutting device provided by this utility model;

[0023] Figure 2 A schematic diagram illustrating the use of the cutting device provided by this utility model;

[0024] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the diagram.

[0025] in,

[0026] 1-Positioning part; 11-Guide rail; 12-Limiting rod; 13-Two rods; 14-Positioning post;

[0027] 2-Moving guide; 21-Guide rod; 22-Connector; 23-Pin; 24-Cutting guide frame; 25-Wheel frame; 26-Guide wheel; 27-Snap-fit; 28-Positioning bolt;

[0028] 3-Cutting machine;

[0029] 4-Reinforcing section; 41-Horizontal bar; 42-Vertical bar;

[0030] 5- Concrete guardrail. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] See appendix Figures 1-3 This utility model discloses a concrete guardrail cutting device, comprising:

[0034] Positioning part 1 includes two parallel and spaced guide rails 11. The axes of the two guide rails 11 are parallel to the height direction of the concrete guardrail 5 and their upper ends are bent to form hooks that can be attached to the concrete guardrail 5.

[0035] The movable guide part 2 includes a guide rod 21 and a cutting guide frame 24 located below the guide rod 21. The two ends of the guide rod 21 are slidably connected to the opposite side walls of the two guide rails 11, and the top end of the cutting guide frame 24 is hinged to the guide rod 21 and can slide up and down along the two guide rails 11 with the guide rod 21.

[0036] The head of the cutting machine 3 is engaged with the cutting guide frame 24 to move up and down with it to cut dummy seams.

[0037] In this embodiment, the shape of the positioning part 1 is adapted to the cross-sectional shape of the concrete guardrail 5.

[0038] In actual use, two guide rails are attached to the concrete guardrail, and the cutting machine is fixed to the cutting guide frame. The worker holds the cutting machine and moves it up and down along the height of the guardrail. During this process, the worker pushes and pulls the cutting guide frame, which in turn drives the guide rod to slide up and down along the guide rails, thereby realizing the cutting operation on the top and inner sides of the guardrail. When encountering the chamfer position on the inner side of the guardrail, the cutting angle of the cutting machine can be adjusted by slightly rotating the cutting guide frame, thereby realizing the full-scale dummy joint cutting operation of the concrete guardrail.

[0039] In some other specific embodiments, the moving guide 2 also includes a connector 22; the guide rod 21 is a square rod, and the cutting guide frame 24 is a rectangular frame; one end of the connector 22 is fixed to the middle of the bottom surface of the square rod, and the other end is hinged to the top of the rectangular frame; the head of the cutting machine 3 is snapped into the frame of the rectangular frame.

[0040] The guide rod is hinged to the cutting guide frame via a connector. The connector increases the distance between the guide rod and the cutting guide frame, which facilitates the cutting operation of the cutting machine when encountering the chamfer of the guardrail. The guide rod will not affect the cutting operation due to being too close to the cutting machine.

[0041] In this embodiment, the guide rod is formed by interlocking and welding two angle steels, the connecting part is a steel plate, and the cutting guide frame is formed by welding angle steels into a rectangular frame.

[0042] In some other specific embodiments, the top of the cutting guide frame 24 is fixed with two parallel and spaced-apart pin ears, and the pin shaft 23 is fixed at the end of the connector 22 away from the guide rod 21. The two ends of the pin shaft 23 are respectively rotatably connected in the two pin ears. The pin shaft 23 realizes the hinge between the cutting guide frame 24 and the guide rod 21. The cutting guide frame 24 can be rotated by a certain angle through the pin shaft 23 to adjust the cutting angle of the cutting machine 3.

[0043] In some other embodiments, a snap-fit ​​component 27 is also included, which is fixed to the side of the rectangular frame away from the concrete guardrail 5 to snap the head of the cutting machine 3; a positioning bolt 28 is screwed onto the snap-fit ​​component 27 to adjust the distance between the cutting machine 3 and the concrete guardrail 5 and to fix their position; the saw blade plane of the cutting machine 3 is arranged perpendicular to the outer surface of the concrete guardrail 5.

[0044] As shown in the attached diagram, the snap-fit ​​connector is formed by welding two perpendicularly arranged angle steels into an L-shape. One side panel of the vertically arranged angle steel is fixed to the frame of the rectangular frame, and the panel of the horizontally arranged angle steel extends along the side away from the concrete guardrail. There are two snap-fit ​​connectors, which are symmetrically arranged vertically along the rectangular frame. The cutting head of the cutting machine is snapped between the two opposite side panels of the two horizontally arranged angle steels of the two snap-fit ​​connectors, and a positioning bolt is screwed onto the upper angle steel. When performing the cutting operation, a trial cut is first made using the cutting machine. After the depth and width of the dummy cut meet the requirements, the positioning bolt is screwed on so that its threaded end abuts against the head of the cutting machine to fix the position of the cutting machine.

[0045] In other specific embodiments, to better achieve synchronous up-and-down movement between the guide rod and the cutting guide frame, both ends of the guide rod 21 and the cutting guide frame 24 are rotatably connected to guide wheels 26, which are rolled on the guide rail 11.

[0046] like Figure 3 As shown, the guide rail is made of angle steel, and the guide wheel is a groove-shaped guide wheel. The guide wheels at both ends of the guide rod are engaged with the horizontal panel of the guide rail, thereby realizing the up and down movement of the guide rod and the cutting guide frame.

[0047] To further optimize the above technical solution and facilitate the rotation of the cutting guide frame 24, wheel frames 25 are hinged to both sides of the frame of the cutting guide frame 24 facing the concrete guardrail 5. The wheel frames 25 are hinged to the cutting guide frame 24 in the form of ball joints. The wheel frames 25 are rotatably connected to the groove-shaped guide wheels 26. Through the hinge between the cutting guide frame 24 and the wheel frames 25, the rotation between the cutting guide frame 24 and the connecting parts 22 can be better realized.

[0048] To further optimize the above technical solution, the positioning part 1 also includes a limiting rod 12 and a connecting rod 13. The two ends of the limiting rod 12 are fixed to the two side walls opposite to the upper ends of the two guide rails 11, respectively; the two ends of the connecting rod 13 are fixed to the two side walls opposite to the lower ends of the two guide rails 11, respectively.

[0049] The two guide rails are connected by a limiting rod and a connecting rod. The limiting rod can limit the sliding displacement of the guide rod and prevent the guide rod from slipping off the guide rail.

[0050] In this embodiment, the bend of the guide rail at the chamfered position on the inner side of the concrete guardrail is processed into an arc transition section to facilitate the up and down movement of the guide rod and the cutting guide frame.

[0051] In other specific embodiments, to avoid rigid contact between the cutting device and the concrete guardrail and prevent damage to the guardrail concrete that would affect the appearance quality of the guardrail, positioning posts 14 are also included. Multiple positioning posts 14 are included, with one end vertically fixed to the side wall of the guide rail 11 facing the concrete guardrail 5, and the other end abutting against the outer surface of the concrete guardrail 5. The outer periphery of the positioning posts 14 is covered with rubber pads.

[0052] In some other embodiments, a reinforcing part 4 is also included, which includes horizontal bars 41 and vertical bars 42. One end of the multiple horizontal bars 41 is fixed to the side wall of the guide rail 11 away from the guide rod 21, and the vertical bars 42 are arranged parallel to the guide rail 11, with their side walls fixed to the other end of the horizontal bars 41. The reinforcing part provides the cutting device with a certain rigidity, increasing its number of uses.

[0053] In other specific embodiments, multiple cutting devices are provided along the length of the concrete guardrail, and a slide rail is fixed on the outer wall of the concrete guardrail. The bent section of the guide rail is slidably connected to the slide rail. By sliding the cutting device along the slide rail, the cutting device can sequentially cut the false joint along the length of the concrete guardrail, avoiding the drawbacks of transporting the cutting device.

[0054] This embodiment only shows the method of using the dummy joint cutting method on the inner side of the concrete guardrail. When cutting the outer side of the concrete guardrail, the cutting device is hung in the opposite direction and used in conjunction with the guardrail construction template trolley. The worker performs the dummy joint cutting operation in the basket of the trolley.

[0055] Example 2:

[0056] This utility model embodiment discloses a method for using a concrete guardrail cutting device, which involves cutting a dummy joint in a concrete guardrail using the concrete guardrail cutting device of embodiment 1, including the following steps:

[0057] S1. The device is in place, the cutting device is assembled and attached to the concrete guardrail;

[0058] When the concrete strength of the guardrail reaches more than 75%, the guardrail formwork is removed, and the assembled cutting device is hung on the concrete guardrail. In order to ensure the aesthetics, the dummy joint can be set at the joint of two adjacent guardrail formwork pieces.

[0059] S2. Adjust the kerf depth. Adjust the depth of the cutting machine into the cutting guide frame and perform a trial cut. When the kerf depth and width meet the requirements, fix the position of the cutting machine.

[0060] After the cutting machine is attached to the cutting guide frame, a trial cutting operation is carried out. Once the cutting depth meets the requirements, the position of the cutting machine is fixed by the positioning bolts.

[0061] S3, dummy seam cutting: The guide rod and cutting guide frame move up and down along the height of the guardrail, and the cutting machine completes the dummy seam cutting operation during the movement.

[0062] During the cutting operation, the worker can provide upward or downward force through the cutting machine, thereby pushing or pulling the cutting guide frame to move up and down along the guide rail. At the same time, the guide rod will move up and down along the guide rail synchronously, thus completing the cutting operation of the entire false seam of the guardrail.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A concrete barrier joint cutting apparatus, characterised in that, The utility model provides a kind of concrete guardrail cutting device, including: Positioning part (1), the positioning part (1) includes two parallel and interval arrangement guide rail (11), the axis of two the guide rail (11) is parallel with the height direction of concrete guardrail (5) and its upper end is bent to form hook and can hang on the concrete guardrail (5) on; Moving guide part (2), the moving guide part (2) includes guide rod (21) and cutting guide frame (24) below the guide rod (21), the both ends of the guide rod (21) are slidably connected on the opposite two side walls of two the guide rail (11) respectively, the top of cutting guide frame (24) is hinged with the guide rod (21) and can slide along two the guide rail (11) up and down with the guide rod (21); Cutting machine (3), the head of cutting machine (3) is clamped on cutting guide frame (24) to move up and down with it and cut false seam.

2. A concrete barrier joint cutting apparatus as claimed in claim 1, wherein, The moving guide part (2) further includes a connecting member (22); the guide rod (21) is a square rod, the cutting guide frame (24) is a rectangular frame; one end of the connecting member (22) is fixed in the middle of the bottom surface of the square rod, and the other end is hinged with the top of the rectangular frame; the head of the cutting machine (3) is clamped in the frame body of the rectangular frame.

3. A concrete barrier sawing device according to claim 2, wherein, It further includes a clamping member (27) fixed on the side of the rectangular frame away from the concrete guardrail (5) to clamp the head of the cutting machine (3); a positioning bolt (28) is screwed on the clamping member (27) to adjust the distance between the cutting machine (3) and the concrete guardrail (5) and fix the position; the saw blade plane of the cutting machine (3) is arranged perpendicular to the outer surface of the concrete guardrail (5).

4. A concrete barrier sawing device according to claim 1, wherein Both ends of the guide rod (21) and the cutting guide frame (24) are rotatably connected with guide wheels (26), and the guide wheels (26) are rollingly connected on the guide rail (11).

5. A concrete barrier sawing device according to claim 1 wherein, The positioning part (1) further includes a limiting rod (12) and a connecting rod (13); both ends of the limiting rod (12) are fixed with the two side walls opposite to the upper ends of the two guide rails (11); both ends of the connecting rod (13) are fixed with the two side walls opposite to the lower ends of the two guide rails (11).

6. A concrete barrier sawing device as claimed in claim 5 wherein, It further includes a plurality of positioning columns (14); one end of each of the plurality of positioning columns (14) is fixed perpendicularly on the side wall of the guide rail (11) facing the concrete guardrail (5), and the other end can abut against the outer surface of the concrete guardrail (5).

7. A concrete barrier sawing device as claimed in claim 6, wherein, The outer periphery of the positioning column (14) is covered with a rubber pad.

8. A concrete barrier sawing device according to claim 1, wherein It further includes a reinforcing part (4) including a horizontal rod (41) and a vertical rod (42); one end of each of the plurality of horizontal rods (41) is fixed on the side wall of the guide rail (11) away from the guide rod (21), and the vertical rod (42) is arranged parallel to the guide rail (11), and the side wall thereof is fixed with the other end of the horizontal rod (41).

9. A concrete barrier sawing device according to claim 1 wherein, The shape of the positioning part (1) is adapted to the cross-sectional shape of the concrete guardrail (5).

Images