Deck rib cutting device and deck rib cutting method

Abstract

To provide a deck rib cutting device and a deck rib cutting method which cuts a deck rib safely and easily.SOLUTION: A deck rib cutting device (1) for cutting a deck rib (110) which is provided on the deck plate lower surface side of a flat deck includes a cutting mechanism (10) which cuts the deck rib (110) and a moving mechanism (20) which supports the cutting mechanism (10) and moves along a longitudinal direction of the deck rib (110). Therein, the moving mechanism (20) includes a pair of gear parts (21) which sandwich and hold the deck rib (110) from both sides, the pair of gear parts (21) rotate while causing a plurality of gear parts (21t) provided on each gear part to bite into both sides of the deck rib (110) successively, thereby, the moving mechanism (20) moves along the longitudinal direction, the cutting mechanism (10) moves along the longitudinal direction together with the moving mechanism (20) and cuts the deck rib (110) along the longitudinal direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a deck rib cutting device and a deck rib cutting method. [Background technology]

[0002] Conventionally, when cutting a steel plate (steel plate), cutting has generally been performed using equipment such as gas cutting, a hand saw, a hand crusher, etc. For example, Patent Document 1 discloses a rib cutting device that is capable of cutting the vicinity of the upper end of the rib to be cut by a rotary blade 5b that is supported movably along a rail and rotatable about a rotary shaft 5f in order to cut the rib (deck rib) of a steel deck plate for floor formwork. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-84634 A Summary of the Invention [Problem to be solved by the invention]

[0004] When cutting deck ribs using the cutting device described in Patent Document 1 or a conventional cutting device, it was sometimes difficult to perform the work safely. For example, when cutting deck ribs on the underside of a flat deck using gas cutting or a hand saw, problems arose such as the need for a worker to support a heavy and large device while operating it, or the worker being unable to secure sufficient working space. In addition, problems such as sparks and dust scattering and unpleasant odors during cutting were likely to occur, making it difficult to easily perform cutting work while ensuring the safety of the worker.

[0005] The present invention has been made in view of the above problems, and an object of the present invention is to cut deck ribs safely and easily. [Means for solving the problem]

[0006] The main invention for achieving the above-mentioned object is a deck rib cutting device that cuts deck ribs provided on the underside of a deck plate of a flat deck, comprising a cutting mechanism that cuts the deck rib, and a moving mechanism that supports the cutting mechanism and moves along the longitudinal direction of the deck rib, wherein the moving mechanism has a pair of gear units that clamp the deck rib from both sides, and the pair of gear units rotate while sequentially biting into both sides of the deck rib, thereby moving the moving mechanism along the longitudinal direction, and the cutting mechanism moves along the longitudinal direction together with the moving mechanism and cuts the deck rib along the longitudinal direction.

[0007] Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0008] According to the present invention, the deck ribs can be cut safely and easily. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic perspective view showing a deck rib cutting device 1. [Diagram 2] FIG. 2 is a diagram showing an example of a flat deck FD having a deck rib 110 to be cut. [Diagram 3] 3A and 3B are diagrams for explaining the operation when the deck rib 110 is cut by the deck rib cutting device 1. FIG. [Figure 4] 10 is a diagram illustrating details of the gear wheel portion 21 and the state when the gear wheel portion 21 bites into the deck rib 110. FIG. [Diagram 5] 1A and 1B are a perspective view and a plan view showing a modified example of the deck rib cutting device 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] At least the following matters will become apparent from the description of this specification and the accompanying drawings. 1. A deck rib cutting device for cutting deck ribs provided on the underside of a deck plate of a flat deck, comprising: a cutting mechanism for cutting the deck rib; and a moving mechanism for supporting the cutting mechanism and moving along the longitudinal direction of the deck rib, wherein the moving mechanism has a pair of gear portions that clamp the deck rib from both sides, and the pair of gear portions rotate while sequentially biting into both sides of the deck rib, thereby moving the moving mechanism along the longitudinal direction, and the cutting mechanism moves along the longitudinal direction together with the moving mechanism and cuts the deck rib along the longitudinal direction.

[0011] Such a deck rib cutting device can safely cut deck ribs (steel plates) while preventing the scattering of sparks, dust, odors, etc. Furthermore, during cutting work, the deck rib is clamped by a pair of gear parts provided on the moving mechanism, making it possible to move the deck rib cutting device in the cutting direction while supporting its own weight, thereby reducing the labor and burden on the worker. Furthermore, since the entire device is compactly configured, no large working space is required. Therefore, deck ribs can be cut safely and easily.

[0012] In such a deck rib cutting device, it is desirable that the gear portion rotates while causing the teeth portion to bite into the deck rib at a position in contact with the underside of the deck plate.

[0013] According to this type of deck rib cutting device, the moving mechanism equipped with the gear unit can move in the longitudinal direction of the deck rib while maintaining a high position in the vertical direction (a position close to the deck plate), making it easier to cut the deck rib at a position close to the underside of the deck plate. This makes it possible to reduce the amount of deck rib left uncut.

[0014] In such a deck rib cutting device, it is desirable that the cutting mechanism is equipped with a pair of blade portions that clamp the deck rib from both sides in the thickness direction and cut it, or a band-shaped blade portion that cuts and cuts the deck rib by rotating at a predetermined speed.

[0015] With this type of deck rib cutting device, sparks and dust are unlikely to fly during cutting work, and odors are unlikely to be generated, so workers can perform cutting work safely. In addition, the cut edge is clean, and the amount of deck rib left uncut can be reduced.

[0016] It is desirable for such a deck rib cutting device to have auxiliary wheels that rotate while in contact with the underside of the deck plate, thereby assisting the movement of the moving mechanism along the longitudinal direction.

[0017] With this deck rib cutting device, when the moving mechanism moves along the length of the deck rib, the auxiliary wheels rotate in contact with the underside of the deck plate, which keeps the vertical positions of the moving mechanism and the cutting mechanism constant and makes it easier to move the moving mechanism smoothly, thereby enabling the deck rib cutting operation to be performed more accurately.

[0018] It also becomes clear that there is a deck rib cutting method for cutting a deck rib provided on the underside of a deck plate of a flat deck, the method comprising: a moving step in which a moving mechanism having a pair of gear portions that clamp the deck rib from both sides moves along the longitudinal direction of the deck rib by rotating while sequentially biting into both sides of the deck rib with a plurality of teeth provided on each of the pair of gear portions; and a cutting step in which a cutting mechanism supported by the moving mechanism moves along the longitudinal direction together with the moving mechanism and cuts the deck rib along the longitudinal direction.

[0019] According to this deck rib cutting method, scattering of sparks, dust, odors, etc. is suppressed, and the deck rib (steel plate) can be cut safely. Furthermore, during cutting work, the deck rib is clamped by a pair of gear parts provided on the moving mechanism, making it possible to move the deck rib cutting device in the cutting direction while supporting its own weight, thereby reducing the labor and burden on the worker. Furthermore, since the entire device is compactly configured, a large working space is not required. Therefore, the deck rib can be cut safely and easily.

[0020] === Implementation form === <Basic structure of deck rib cutting device 1> A deck rib cutting device 1 will be described as an example of a cutting device capable of cutting a rib plate (deck rib) provided on the underside of a formwork deck plate (so-called "flat deck") used when pouring concrete for floors and roof slabs in construction work, etc. The deck rib cutting device 1 of this embodiment is also capable of cutting steel plates (steel plates) other than deck ribs.

[0021] Fig. 1 is a schematic perspective view showing a deck rib cutting device 1. As shown in Fig. 1, the deck rib cutting device 1 has a front-rear direction, a left-right direction, and a top-bottom direction that intersect with each other. Of these, the front-rear direction is a direction along the longitudinal direction of the deck rib, and the top-bottom direction is a direction along the vertical direction.

[0022] The deck rib cutting device 1 of this embodiment is equipped with a cutting mechanism 10, a moving mechanism 20, a driving mechanism 30, and auxiliary wheels 40, and is capable of cutting deck ribs 110 and other steel plates provided on the underside of the deck plate 100 of a flat deck FD (see Figure 2 described below).

[0023] The cutting mechanism 10 is for cutting steel plates such as the deck ribs 110 in the thickness direction (left-right direction in FIG. 1), and has a blade section 11 and a power transmission section 12. The blade section 11 is a blade made of a hard material such as cemented carbide capable of cutting the deck ribs 110. In FIG. 1, a pair of blade sections 11, 11 configured in a scissors shape is provided on both sides in the left-right direction sandwiching the deck rib 110. When cutting the deck rib 110, the pair of blade sections 11, 11 are opened and closed in the left-right direction to sandwich and cut the deck rib 110. The power transmission section 12 is a section for transmitting a driving force generated by the drive mechanism 30 to the blade section 11 and opening and closing the blade section 11 in the left-right direction to cut the deck rib 110. In this embodiment, it is preferable that the blade section 11 is driven by a hydraulic system so that the blade section 11 can generate a force large enough to cut the deck rib 110, and the power transmission section 12 is configured to be able to transmit a hydraulic driving force. The power transmission portion 12 also functions as a support portion that supports the blade portion 11 .

[0024] The moving mechanism 20 is for moving along the longitudinal direction of the deck rib 110 (front-rear direction in FIG. 1) while supporting the cutting mechanism 10, and has a gear unit 21 and a power transmission unit 22. The gear unit 21 is a rotating body that can rotate around a rotation axis 21c (see FIG. 4 described later), and has a plurality of teeth 21t that spread radially in the radial direction (direction perpendicular to the rotation axis 21c). The moving mechanism 20 of this embodiment has a pair of gear units 21, 21 on both sides in the left-right direction sandwiching the deck rib 110 to be cut. The pair of gear units 21, 21 sandwich the deck rib 110 from both sides in the left-right direction, and rotate while sequentially biting into both sides of the deck rib 110, thereby making the moving mechanism 20 movable in the front-rear direction. Note that in this specification, it is assumed that the moving mechanism 20 cuts the deck rib 110 while moving from the rear side to the front side in the front-rear direction. However, the movement mechanism 20 can also move from the front to the rear in the front-rear direction by changing the rotation direction of the gear parts 21, 21.

[0025] The power transmission unit 22 is a part for transmitting the driving force generated by the drive mechanism 30 to the gear unit 21 and rotating the gear unit 21, thereby moving the moving mechanism 20. The power transmission unit 22 is preferably driven by a hydraulic system, similar to the power transmission unit 12 of the cutting mechanism 10, so that a force large enough to rotate the gear unit 21 while causing the teeth 21t of the gear unit 21 to bite into the deck rib 110 can be generated, and the power transmission unit 22 is configured to be able to transmit a hydraulic driving force. The power transmission unit 22 also includes a pair of gear support arms 22s, 22s that rotatably support the gear unit 21 forward of the cutting mechanism 10 in the front-to-rear direction and transmit a rotational driving force to the gear unit 21.

[0026] The drive mechanism 30 is a component that generates a drive force for driving the cutting mechanism 10 and the moving mechanism 20. The drive mechanism 30 includes, for example, a known motor and hydraulic oil tank, and is configured to be capable of generating a hydraulic drive force as described above. Note that the drive mechanism 30 itself does not necessarily have to be provided in the deck rib cutting device 1. For example, the drive force may be supplied from outside the deck rib cutting device 1 by a drive force supply device or the like installed on the ground.

[0027] The auxiliary wheels 40 are disk-shaped members that can rotate around a rotation axis along the left-right direction, and a pair of auxiliary wheels 40 are provided in the left-right direction. When the deck rib cutting device 1 cuts the deck rib 110, the auxiliary wheels 40 rotate in contact with the underside of the deck plate 100, thereby enabling the deck rib cutting device 1 (moving mechanism 20) to move smoothly in the front-rear direction.

[0028] <Cutting operation of deck rib 110> Next, the operation of cutting the deck rib 110 using the deck rib cutting device 1 will be specifically described. Fig. 2 is a diagram showing an example of a flat deck FD equipped with the deck rib 110 to be cut. Figs. 3A and 3B are diagrams explaining the operation when cutting the deck rib 110 by the deck rib cutting device 1. Fig. 3A shows the deck rib cutting device 1 as viewed from the right side in the left-right direction, and Fig. 3B shows the deck rib cutting device 1 as viewed from above in the up-down direction.

[0029] As shown in Fig. 2, the flat deck FD is composed of a deck plate 100 formed in a planar shape, and a plurality of deck ribs 110 extending in the front-rear direction on the underside of the deck plate 100, spaced apart in the left-right direction. With the deck rib cutting device 1 of this embodiment, in such a flat deck FD, each deck rib 110 can be cut and separated near the boundary with the deck plate 100. However, the shape of the deck rib 110 to be cut is not limited to the example shown in Fig. 2, and it is also possible to cut steel plates other than the deck ribs 110.

[0030] During the cutting operation of the deck rib 110, as shown in FIG. 3B, the deck rib 110 is sandwiched from both sides in the left-right direction (i.e., the thickness direction of the deck rib 110) by a pair of gear parts 21, 21, and the teeth part 21t is bitten into the deck rib 110. The teeth part 21t is formed with a sharp tip and made of cemented carbide or the like having a higher hardness than at least the steel plate to be cut (here, the deck rib 110), and can be deeply pierced into the deck rib 110 by being driven by hydraulic pressure. At this time, the load of the entire deck rib cutting device 1 is supported by the teeth parts 21t, 21t that are biting into (piercing) both sides in the left-right direction (thickness direction) of the deck rib 110. During the actual cutting operation, as shown in FIG. 1 and FIG. 3A, the top surface part of the power transmission part 12 of the cutting mechanism 10 is positioned so as to cover the deck rib 110 after it has been cut from above. Therefore, even if the tooth portions 21t, 21t come off the deck rib 110 or an incident occurs in which the deck rib cutting device 1 is unable to support the load of the entire device, there is little risk of the deck rib cutting device 1 falling.

[0031] Next, with the teeth 21t, 21t biting into the deck rib 110, the cutting mechanism 10 is operated to clamp and cut the deck rib 110 with the blade 11. As shown in Fig. 3A, the blade 11 of the cutting mechanism 10 is arranged substantially parallel to the underside of the deck plate 100 and in contact with the underside of the deck plate. This makes it possible to cut the deck rib 110 near the boundary between the underside of the deck plate 100 and the deck rib 110. In other words, the portion of the deck rib 110 that is left uncut can be made as small as possible.

[0032] In addition, by clamping and cutting the deck rib 110 with a pair of blades 11, 11, sparks and dust are less likely to fly and odors are less likely to be generated compared to conventional gas cutting or cutting the deck rib 110 with a hand saw. Therefore, workers can perform the cutting work safely. Furthermore, because the deck rib 110 is sheared from both sides in the thickness direction by the sharp blades 11, 11, the cut edges are clean and less of the deck rib is left uncut.

[0033] Next, the moving mechanism 20 moves to the front in the front-rear direction (the longitudinal direction of the deck rib 110) while supporting the cutting mechanism 10. Specifically, the pair of gear units 21, 21 rotate while sequentially biting into both sides in the thickness direction (left-right direction) of the deck rib 110, thereby causing the moving mechanism 20 to move. FIG. 4 is a diagram for explaining the details of the gear unit 21 and the state when the gear unit 21 bites into the deck rib 110.

[0034] The gear portion 21 has a plurality of teeth 21t radially extending from a rotation axis 21c serving as the center of rotation. As shown in the AA cross section (cross section perpendicular to the direction of rotation) of Fig. 4, each tooth 21t has a thickness that decreases from the center toward the outside in the radial direction. That is, the upper surface of the tooth 21t is inclined at a predetermined angle with respect to the horizontal plane, and the cross-sectional shape of the gear portion 21 as a whole is substantially trapezoidal. In the example of Fig. 4, the tooth 21t is inclined at an angle θt with respect to the horizontal plane.

[0035] As described above, in the moving mechanism 20, the gear part 21 is rotated and the teeth part 21t is successively caused to bite into the deck rib 110, so that the deck rib cutting device 1 moves forward in the front-rear direction. At that time, a force is applied by the load of the driving mechanism 30, etc., such that the rear part of the deck rib cutting device 1 in the front-rear direction is lowered downward in the vertical direction, with the teeth part 21t currently biting into the deck rib 110 as a fulcrum. Conversely, a force is applied such that the front part of the deck rib cutting device 1 in the front-rear direction is lifted upward in the vertical direction. As a result, the gear part 21 is inclined at an angle θt with respect to the horizontal direction (the front-rear direction in FIG. 4), and the gear part 21 rotates with the upper surface of the teeth part 21t parallel to the lower surface of the deck plate 100 (see FIG. 4). In other words, the gear part 21 rotates with the rotation axis 21c inclined at an angle θt with respect to the vertical direction.

[0036] With this configuration, when the gear portion 21 rotates, the teeth portion 21t easily bites into the deck rib 110 at a position close to the underside of the deck plate 100. In other words, the teeth portion 21t easily bites into the deck rib 110 at a position close to the upper end of the deck rib 110 in the up-down direction, and the moving mechanism 20 can move in the front-rear direction together with the cutting mechanism 10 while maintaining a high position in the upward direction (a position close to the underside of the deck plate 100).

[0037] When the moving mechanism 20 moves in the front-rear direction, the auxiliary wheels 40 rotate in a state of contacting the underside of the deck plate 100. This keeps the positions of the moving mechanism 20 and the cutting mechanism 10 constant in the up-down direction, and makes it easier for the moving mechanism 20 to move smoothly in the front-rear direction. This allows the cutting operation of the deck rib 110 to be performed more accurately.

[0038] After the moving mechanism 20 moves forward in the fore-and-aft direction, the cutting mechanism 10 is operated again and the blade portion 11 clamps and cuts the deck rib 110. Because the auxiliary wheels 40 make it easier to keep the position of the cutting mechanism 10 constant in the up-down direction, the deck rib 110 can be neatly cut near the boundary between the underside of the deck plate 100 and the deck rib 110.

[0039] After the cutting operation by the cutting mechanism 10 is completed, the moving mechanism 20 again moves to the front side in the front-rear direction (the longitudinal direction of the deck rib 110) while supporting the cutting mechanism 10. Then, by repeating such an operation, it is possible to cut the deck rib 110 along the front-rear direction (the longitudinal direction).

[0040] According to the cutting operation using the deck rib cutting device 1 of this embodiment, scattering of sparks, dust, odors, etc. is suppressed, and the deck rib 110 (steel plate) can be cut safely. Furthermore, during cutting work, the deck rib 110 to be cut is clamped by a pair of gear parts 21, 21 provided on the moving mechanism 20, and the deck rib cutting device 1 can be moved in the cutting direction (front-back direction in FIG. 1) while supporting its own weight, so that the labor and burden on the worker is small. Furthermore, since the entire deck rib cutting device 1 is configured compactly, a large working space is not required. Therefore, the cutting work of the deck rib 110 can be easily performed.

[0041] <Modification> Figure 5 is a perspective view and a plan view showing a modified example of the deck rib cutting device 1. In the modified example shown in Figure 5, the configuration of the cutting mechanism 10 is different from that of the deck rib cutting device 1 described in Figure 1. Note that the configurations of the components other than the cutting mechanism 10 are the same as those of the deck rib cutting device 1 described in Figure 1, and therefore detailed description thereof will be omitted.

[0042] In the deck rib cutting device 1 of the modified example, the cutting mechanism 10 has a band-shaped blade portion 13 and a power transmission unit 14. The band-shaped blade portion 13 is a flexible band-shaped saw blade formed in an annular shape. The band-shaped blade portion 13 is rotated at a low speed and pressed against the steel material to be cut (deck rib 110), thereby cutting the steel material. In other words, the band-shaped blade portion 13 functions as a so-called band saw. The power transmission unit 14 is a housing that contains the band-shaped blade portion 13, and rotates the band-shaped blade portion 13 at a predetermined speed inside the power transmission unit 14 using the driving force generated by the drive mechanism 30.

[0043] The cutting operation of the deck rib 110 by the deck rib cutting device 1 of the modified example is substantially the same as the cutting operation described in Fig. 3. That is, the deck rib 110 is sandwiched between a pair of gear units 21, 21 provided on the moving mechanism 20, and the gear units 21, 21 are rotated while causing a plurality of teeth 21t to bite into both sides of the deck rib 110 sequentially, thereby moving the moving mechanism 20 along the longitudinal direction (front-rear direction) of the deck rib 110. In this modified example, the band-shaped blade unit 13 of the cutting mechanism 10 is constantly rotated during the cutting operation. As a result, the deck rib 110 is continuously cut by the band-shaped blade unit 13 as the moving mechanism 20 moves.

[0044] According to the deck rib cutting device 1 (modified example) in Fig. 5, it is possible to cut the deck ribs 110 without scattering sparks or dust by using a band-shaped blade portion 13 (band saw) that rotates at a low speed. In addition, since it is configured to be about the same size and weight as the deck rib cutting device 1 in Fig. 3, it is possible to cut the deck ribs safely and easily.

[0045] ===Other embodiments=== The above-mentioned embodiment is for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents. In particular, the following embodiments are also included in the present invention.

[0046] In the above-described embodiment, the drive mechanism 30 of the deck rib cutting device 1 operates the cutting mechanism 10 and the moving mechanism 20 using a hydraulic system, but as long as it is possible to generate a driving force (torque) of sufficient output, a drive system other than hydraulic, such as a mechanical system or an electrical system, may be used. [Explanation of symbols]

[0047] 1 Deck rib cutting device, 10 cutting mechanism; 11 blade portion, 12 power transmission portion, 13 band blade portion, 14 power transmission portion, 20 movement mechanism; 21 gear part, 21c rotating shaft, 21t tooth part, 22 power transmission part, 22s gear support arm, 30 Drive mechanism, 40 Auxiliary wheels, 100 Deck plate, 110 Deck rib, FD Flat Deck

Claims

1. A deck rib cutting device for cutting a deck rib provided on the underside of a deck plate of a flat deck, a cutting mechanism for cutting the deck rib; A moving mechanism that supports the cutting mechanism and moves along the longitudinal direction of the deck rib; having The moving mechanism includes a pair of gear units that sandwich the deck rib from both sides, The pair of gear units rotate while sequentially engaging a plurality of teeth provided on each of the pair of gear units with both sides of the deck rib, thereby moving the moving mechanism along the longitudinal direction, A deck rib cutting device, characterized in that the cutting mechanism moves along the longitudinal direction together with the moving mechanism and cuts the deck rib along the longitudinal direction.

2. 2. The deck rib cutting device according to claim 1, A deck rib cutting device characterized in that the gear portion rotates while biting into the deck rib at a position in contact with the underside of the deck plate.

3. 3. The deck rib cutting device according to claim 1 or 2, The deck rib cutting device is characterized in that the cutting mechanism is equipped with a pair of blade portions that clamp the deck rib from both sides in the thickness direction and cut it, or a band-shaped blade portion that cuts and cuts the deck rib by rotating at a predetermined speed.

4. The deck rib cutting device according to any one of claims 1 to 3, A deck rib cutting device characterized in having an auxiliary wheel that rotates while in contact with the underside of the deck plate to assist the moving mechanism in moving along the longitudinal direction.

5. A deck rib cutting method for cutting a deck rib provided on the underside of a deck plate of a flat deck, comprising: a moving step in which a moving mechanism having a pair of gear parts that sandwich the deck rib from both sides rotates while sequentially biting multiple teeth provided on each of the pair of gear parts into both sides of the deck rib, thereby moving along the longitudinal direction of the deck rib; a cutting step in which a cutting mechanism supported by the moving mechanism moves along the longitudinal direction together with the moving mechanism and cuts the deck rib along the longitudinal direction; A deck rib cutting method comprising the steps of:

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