Reinforcing bar gripping device

Abstract

To provide a reinforcing bar gripping device capable of properly gripping a reinforcing bar.SOLUTION: A reinforcing bar gripping device includes: a conveyor 44 that can rotate about a horizontal axis; a gripping member 45 fixed to the conveyor 44, the gripping member 45 having a base 48 provided on a fixed surface 44a of the conveyor 44, and a pair of claws 51, 52 provided on the base 48, facing each other, and capable of gripping a reinforcing bar B, the claws 51 and 52 having protrusions 511 and 521 provided on the base 48 so as to protrude in a direction away from the fixed surface 44a, in which the reinforcing bar B can be placed on placement surfaces 511a, 511b, 521a, 521b of the protrusions 511, 521 that face the opposing claws 51, 52.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar gripping device. [Background technology]

[0002] Conventionally, when manufacturing rebar mesh units in which rebars are arranged, assembly work has generally been performed based on construction drawings. Rebar mesh units are manufactured by placing the rebars one by one, mainly by manual labor. When handling large-diameter or long rebars in large-scale construction projects, depending on the type of rebar, the weight of each rebar can be heavy, and multiple workers must transport each rebar to the designated location and perform the rebar placement work. Because this work is extremely labor-intensive, in some cases, rebar placement work is performed using rebar placement devices or rebar placement robots (see Patent Documents 1, 2, and 3 listed below).

[0003] Patent document 3 discloses a configuration that includes a pair of gripping parts that can grip a reinforcing bar, with the gripping parts having recessed locking surfaces on opposing sides, with the reinforcing bar being placed between the locking surfaces and gripped by the biasing force of a spring. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 1-75131 [Patent Document 2] Japanese Patent Application Publication No. 1-75132 [Patent Document 3] Japanese Patent Application Publication No. 4-347264 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the gripping parts disclosed in Patent Document 1 have a problem in that the operation of the chain device may cause the reinforcing bar to unintentionally fall out from between the locking surfaces of the pair of gripping parts.

[0006] Therefore, the present invention has been made in consideration of the above circumstances, and provides a reinforcing bar gripping device that can properly grip reinforcing bars. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention employs the following means. In other words, the reinforcing bar gripping device of the present invention comprises a conveyor that can rotate around a horizontal axis and a gripping member fixed to the conveyor, the gripping member comprising a base provided on a fixed surface of the conveyor and a pair of claw portions that are provided on the base and face each other and can grip reinforcing bars, the claw portions having a protrusion provided on the base so as to protrude away from the fixed surface and a locking portion extending from the protrusion toward the opposing claw portion, the supporting surface of the protrusion facing the opposing claw portion can be used to place the reinforcing bar, and an opening is formed between the locking portions of the pair of claw portions through which the reinforcing bar can be inserted.

[0008] In the reinforcing bar gripping device configured in this manner, the reinforcing bar is inserted through an opening formed between the locking portions of the pair of claws and placed between the pair of claws. The reinforcing bar can be placed on the placement surface of the protruding portion facing the opposing claw. The locking portion extending from the protruding portion toward the opposing claw prevents the placed reinforcing bar from accidentally falling. Therefore, when the gripping member reaches a predetermined position as the conveyor rotates, the reinforcing bar can be placed between the opening and the claws, allowing the reinforcing bar to be properly gripped while the conveyor rotates.

[0009] In addition, in the rebar gripping device of the present invention, the protruding length from the base to the locking portion of the first claw portion of the pair of claw portions may be longer than the protruding length from the base to the locking portion of the second claw portion of the pair of claw portions.

[0010] In the reinforcing bar gripping device configured in this manner, the protruding length of the first claw is longer than the protruding length of the second claw. Therefore, when scooping up and retrieving a reinforcing bar while the gripping member provided on the conveyor is rising, if the gripping member is oriented so that the first claw is positioned on the lower side and the second claw is positioned on the upper side, the reinforcing bar can be reliably scooped up.

[0011] In addition, in the reinforcing bar gripping device of the present invention, the gripping member may be arranged so that the first claw portion is positioned lower than the second claw portion, and the opening faces downward from an acquisition position where the reinforcing bar is acquired and placed on the placement surface of the first claw portion, and the reinforcing bar can be dropped through the opening and placed as the conveyor rotates.

[0012] In the reinforcing bar gripping device configured in this way, at the acquisition position where the first claw is positioned lower than the second claw, the gripping member can acquire the reinforcing bar and place it on the placement surface of the first claw. At the reinforcing bar placement position where the opening is positioned downward, the reinforcing bar can be dropped through the opening and placed. The process from acquiring the reinforcing bar to placing it can be carried out smoothly as the conveyor rotates.

[0013] In addition, in the reinforcing bar gripping device according to the present invention, the gripping members may pass through the acquisition position while ascending in accordance with the rotation of the conveyor.

[0014] In the reinforcing bar gripping device configured in this way, the gripping member passes through the capture position while rising in accordance with the rotation of the conveyor. Therefore, the reinforcing bar can be reliably captured because the gripping member captures the reinforcing bar while rising.

[0015] In addition, in the reinforcing bar gripping device according to the present invention, the gripping members may reach the reinforcing bar arrangement position when the lowering of the gripping members is completed in accordance with the rotation of the conveyor.

[0016] In this rebar gripping device, when the gripping member finishes descending as the conveyor rotates, it reaches the rebar placement position. Therefore, the rebar is dropped from the opening below the conveyor, near the rebar stand, allowing the rebar to be placed in the appropriate position.

[0017] In addition, in the reinforcing bar gripping device of the present invention, when the gripping member is descending as the conveyor rotates, the second claw portion may be positioned lower than the first claw portion, and the reinforcing bar may be placed on the placement surface of the second claw portion.

[0018] In the reinforcing bar gripping device configured in this way, when the gripping member is lowered as the conveyor rotates, the second claw is positioned lower than the first claw, and the reinforcing bar is placed on the placement surface of the second claw. Therefore, even when the gripping member is lowered, the reinforcing bar is prevented from falling. [Effects of the Invention]

[0019] According to the reinforcing bar gripping device of the present invention, reinforcing bars can be gripped appropriately. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view of a reinforcement arrangement device equipped with a reinforcing bar gripping device according to an embodiment of the present invention. FIG. [Figure 2] FIG. 10 is a perspective view showing a reinforcing bar unit arranged by a reinforcing bar arrangement device. [Figure 3] FIG. 10 is a plan view showing a reinforcing bar unit arranged by a reinforcing bar arrangement device. [Figure 4] FIG. 1 is a perspective view showing a linear reinforcing bar arrangement device. [Figure 5] 10(a), (b), and (c) are diagrams illustrating the operation of the reinforcing bar gripping device. [Figure 6] 10(a), (b), and (c) are diagrams illustrating the operation of the reinforcing bar gripping device. [Figure 7] FIG. 2 is a perspective view showing one aspect of a gripping member. [Figure 8]FIG. 10 is a perspective view showing another aspect of the gripping member. [Figure 9] FIG. 2 is a side view showing one embodiment of a reinforcing bar gripping member. [Figure 10] FIG. 10 is a side view showing another aspect of the reinforcing bar gripping member. DETAILED DESCRIPTION OF THE INVENTION

[0021] A reinforcing bar gripping device according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a reinforcing bar arrangement device equipped with a reinforcing bar gripping device according to one embodiment of the present invention. As shown in FIG. 1, the reinforcement arrangement device 100 includes a reinforcement stand 1, a curved reinforcement arrangement device 2, and a straight reinforcement arrangement device 3.

[0022] Fig. 2 is a perspective view showing a reinforcing bar unit arranged by the reinforcing bar arrangement device 100. Fig. 3 is a plan view showing a reinforcing bar unit arranged by the reinforcing bar arrangement device 100. As shown in Figures 2 and 3, the length direction of the curved reinforcement A along the horizontal direction is defined as the curved reinforcement direction X, and the length direction of the straight reinforcement B along the horizontal direction is defined as the straight reinforcement direction Y. The curved reinforcement direction X and the straight reinforcement direction Y are perpendicular to each other. The reinforcement arrangement device 100 arranges a reinforcing bar unit C in which multiple curved reinforcement A and multiple straight reinforcement B are perpendicular to each other. The multiple curved reinforcement A are arranged at intervals in the straight reinforcement direction Y. The multiple straight reinforcement B are arranged at intervals in the curved reinforcement direction X.

[0023] As shown in FIG. 1, the reinforcement frame 1 has a support base 10, a curved reinforcement support base 11, and a straight reinforcement support base 16.

[0024] The support base 10 is installed on an installation surface. The support base 10 has a framework shape with a lattice formed inside the four-sided frame, for example, made up of multiple members extending in the curved muscle direction X and multiple members extending in the straight muscle direction Y.

[0025] The curved bar support stand 11 has multiple curved bar support members 12. The curved bar support members 12 are linear members extending in the linear bar direction Y. The curved bar support members 12 are supported by a support base 10. The multiple curved bar support members 12 are arranged at intervals in the curved bar direction X. Since the curved bar A has a shape that is convex toward the center and upward in the curved bar direction X, among the multiple curved bar support members 12, the curved bar support members 12 arranged toward the center of the curved bar direction X are arranged higher than the curved bar support members 12 arranged at the end sides of the curved bar direction X. The curved bar support members 12 have multiple downwardly recessed grooves 12a formed at intervals in the linear bar direction Y. The curved bars A are placed in the grooves 12a.

[0026] The straight bar support stand 16 has multiple straight bar support members 17. The straight bar support members 17 are curved members that extend in the curved bar direction X and convex upward. The straight bar support members 17 are supported by the support base 10. The multiple straight bar support members 17 are arranged at intervals in the straight bar direction Y. The straight bar support members 17 have multiple downwardly recessed grooves 17a formed at intervals in the curved bar direction X. Straight bars B are placed in the grooves 17a.

[0027] The curved reinforcement arrangement device 2 can move the support base 10 in the straight reinforcement direction Y. The curved reinforcement arrangement device 2 moves from the position shown in FIG. 1 to one side Y1 in the straight reinforcement direction Y to the start point 1A, and then moves to the other side Y2 in the straight reinforcement direction Y, while arranging curved reinforcement A in the groove 12a of the curved reinforcement receiving member 12.

[0028] The straight reinforcing bar arrangement device 3 can move the support base 10 in the curved reinforcing bar direction X. The straight reinforcing bar arrangement device 3 moves from the position shown in Fig. 1 to one side X1 in the curved reinforcing bar direction X to the start point 1A, and then moves to the other side X2 in the curved reinforcing bar direction X while placing straight reinforcing bars B in the grooves 17a of the straight reinforcing bar receiving member 17. Note that the straight reinforcing bar arrangement device 3 may be configured to arrange straight reinforcing bars B, and then the curved reinforcing bar arrangement device 2 may arrange curved reinforcing bars A.

[0029] FIG. 4 is a perspective view showing a straight reinforcing bar arrangement device. The mechanisms of the curved reinforcing bar arrangement device 2 and the straight reinforcing bar arrangement device 3 will be explained using the drawings of the straight reinforcing bar arrangement device 3. The curved reinforcing bar arrangement device 2 and the straight reinforcing bar arrangement device 3 each include a device main body 20, a reinforcing bar placement unit 21, a reinforcing bar push-up unit (not shown), a reinforcing bar delivery unit 23, a reinforcing bar temporary placement unit 25 (see FIG. 5), a staggered adjustment device (not shown), and a reinforcing bar gripping device 4. The device main body 20 is movable in the curved reinforcing bar direction X relative to the support base 10.

[0030] 5 and 6 are diagrams illustrating the operation of the reinforcing bar gripping device. As shown in FIG. 5(a), a plurality of straight bars B can be placed on the upper side of the reinforcing bar placing section 21. The straight bars B placed on the reinforcing bar placing section 21 have not yet been arranged by the reinforcing bar gripping device 4. The reinforcing bar placing section 21 is configured to arrange the plurality of straight bars B close to one side X1. For example, the reinforcing bar placing section 21 has an axis oriented in the straight bar direction Y and is equipped with a conveyor that rotates so that the upper side moves to one side X1.

[0031] The reinforcing bar push-up unit is movable upward and downward and pushes upward the straight bars B that are positioned nearest to one side X1 among the plurality of straight bars B placed on the reinforcing bar placing unit 21.

[0032] The upper surface of the reinforcing bar feed-out section 23 is gradually inclined downward as it approaches the one side X1. As shown in Figure 5(c), the straight bar B pushed up by the reinforcing bar push-up section moves by rolling on the upper surface of the reinforcing bar feed-out section 23 toward the one side X1.

[0033] The rebar temporary restraints 25 are capable of placing the straight rebars B that have rolled over the top surface of the rebar delivery section 23. A plurality of the rebar temporary restraints 25 are arranged at intervals in the straight rebar direction Y. The straight rebars B are stretched between the plurality of the rebar temporary restraints 25. A staggered adjustment device (not shown) adjusts the position of the straight rebars B in the straight rebar direction Y.

[0034] The rebar gripping device 4 scoops up the straight rebar B placed on the rebar temporary placement section 25 and arranges it in a predetermined position. As shown in FIG. 4, the rebar gripping device 4 is equipped with multiple rebar gripping mechanisms 41. The multiple rebar gripping mechanisms 41 are arranged at intervals in the straight rebar direction Y. The multiple rebar gripping mechanisms 41 are connected to each other and are movable in the vertical direction relative to the device main body 20.

[0035] The reinforcing bar gripping mechanism 41 includes a support portion 42 , a pair of upper and lower gears 43 , 43 , a conveyor 44 , and a plurality of gripping members 45 .

[0036] The support part 42 is a member that is long in the vertical direction. A pair of gears 43 is provided on the upper and lower parts of the support part 42. The gear 43 is connected to the support part 42 so as to be rotatable around an axis that is the direction Y of the linear stripes. When viewed from one side Y1, the gear 43 can rotate clockwise. The conveyor 44 is wound around the pair of gears 43, 43. As shown in FIG. 5, as the pair of gears 43, 43 rotate, the conveyor 44 can also rotate in the direction of the arrow.

[0037] The multiple gripping members 45 are provided at intervals in the longitudinal direction of the conveyor 44. In the illustrated example shown in Fig. 5, two gripping members 45 are provided on the conveyor 44, but the number of gripping members 45 can be set appropriately. As the conveyor 44 rotates, the positions and orientations of the gripping members 45 change.

[0038] 7 and 8 are perspective views showing the gripping member 45. FIG. As shown in FIGS. 7 and 8, the gripping member 45 has a fixing portion 46 and a gripping portion 47.

[0039] 9, the fixed part 46 is fixed to the conveyor 44. The fixed part 46 is fixed to a fixed surface 44a that faces the outer periphery of the conveyor 44 and is wound around the pair of gears 43, 43. The fixed part 46 may be fixed directly to the conveyor 44 with a fastener such as a bolt, or a fixing member such as a bracket may be fixed to the conveyor 44 and the fixed part 46 may be fixed to the bracket.

[0040] The grip portion 47 has a base portion 48 and a pair of claw portions 51, 52. The base portion 48 and the pair of claw portions 51, 52 are integrally formed. One of the claw portions is referred to as the first claw portion 51. The other claw portion is referred to as the second claw portion 52.

[0041] The base 48 is fixed to the fixed portion 46. The base 48 is provided on the fixed surface 44a of the conveyor 44 via the fixed portion 46. The base 48 extends in the longitudinal direction of the conveyor 44. The longitudinal direction L of the base 48 is defined as the longitudinal direction of the conveyor 44.

[0042] The first claw portion 51 and the second claw portion 52 are arranged opposite to each other in the longitudinal direction L. A gripping space S1 capable of gripping a straight line B is formed between the first claw portion 51 and the second claw portion 52.

[0043] The first claw portion 51 is provided at an end portion 48a on one side in the longitudinal direction L of the base portion 48. The first claw portion 51 has a protruding portion 511 and a locking portion 512.

[0044] The protrusion 511 is provided on one end 48a of the base 48 in the longitudinal direction L, and extends in a direction away from the fixing surface 44a. The inner surface of the protrusion 511 facing the gripping space S1 has a curved surface (placing surface) 511a and a flat surface (placing surface) 511b. The curved surface 511a has a curved shape that is recessed outward from the gripping space S1. The flat surface 511b has a planar shape that follows a plane perpendicular to the fixing surface 44a.

[0045] The locking portion 512 is formed contiguous with the protruding portion 511. The locking portion 512 extends from the protruding portion 511 toward the second claw portion 52. The inner surface of the locking portion 512 facing the gripping space S1 has a curved surface 512a. The curved surface 512a has a curved shape that is recessed outward from the gripping space S1. The curvature of the curved surface 512a is smaller than the curvature of the curved surface 511a. The locking portion 512 has a tapered shape that becomes thinner toward the tip.

[0046] The curved surface 511a and the flat surface 511b of the protruding portion 511 and the curved surface 512a of the locking portion 512 are configured so that the straight line B can be placed thereon.

[0047] The second claw portion 52 is provided at the end portion 48b on the other side in the longitudinal direction L of the base portion 48. The second claw portion 52 has a protruding portion 521 and a locking portion 522.

[0048] The protruding portion 521 is provided on the other end portion 48b of the base portion 48 in the longitudinal direction L, and extends in a direction away from the fixing surface 44a. The inner surface of the protruding portion 521 facing the gripping space S1 has a curved surface (placing surface) 521a and a flat surface (placing surface) 521b. The curved surface 521a has a curved shape that is recessed outward from the gripping space S1. The flat surface 521b has a planar shape that follows a plane perpendicular to the fixing surface 44a.

[0049] The locking portion 522 is formed contiguous with the protruding portion 521. The locking portion 522 extends from the protruding portion 521 toward the first claw portion 51. The inner surface of the locking portion 522 facing the gripping space S1 has a curved surface 522a. The curved surface 522a has a curved shape that is recessed outward from the gripping space S1. The curvature of the curved surface 522a is smaller than the curvature of the curved surface 521a. The locking portion 522 has a tapered shape that becomes thinner toward the tip.

[0050] The curved surface 521a and the flat surface 521b of the protruding portion 521 and the curved surface 522a of the locking portion 522 are capable of receiving the straight line B thereon.

[0051] A protruding length L1 from the base 48 of the first claw 51 to the locking portion 512 is longer than a protruding length L2 from the base 48 of the second claw 52 to the locking portion 522.

[0052] The locking portion 512 of the first claw portion 51 extends toward the second claw portion 52, and the locking portion 522 of the second claw portion 52 extends toward the first claw portion 51, thereby narrowing the opening S2 of the gripping space S1.

[0053] The distance L3 between the locking portion 512 of the first claw portion 51 and the locking portion 522 of the second claw portion 52, i.e., the distance L3 of the opening S2, is longer than the diameter L4 of the straight line B. This allows the straight line B to pass through the opening S2.

[0054] The multiple rebar gripping mechanisms 41 of the curved reinforcing bar arrangement device 2 have the same configuration as the rebar gripping mechanisms 41 of the straight reinforcing bar arrangement device 3, and therefore a description thereof will be omitted. In the curved reinforcing bar arrangement device 2, the rebar gripping mechanisms 41 on the central side in the curved reinforcing bar direction X are arranged higher than the rebar gripping mechanisms 41 on the end sides in the curved reinforcing bar direction X. In the curved reinforcing bar arrangement device 2, the rebar gripping devices 4 may be immovable in the vertical direction relative to the device main body 20.

[0055] Next, we will explain the operation of the reinforcing bar gripping mechanism 41. We will explain the operation of the reinforcing bar gripping mechanism 41 using the illustrated example of the straight reinforcing bar arrangement device 3, but the reinforcing bar gripping mechanism 41 of the curved reinforcing bar arrangement device 2 also operates in the same way. As shown in Figure 5(a), the conveyor 44 rotates so that the side facing the rebar feed-out section 23 rises and the side facing the start point 1A (see Figure 1) of the reinforcement frame 1 falls. The gripping member 45 facing the rebar feed-out section 23 is referred to as gripping member 45A. The gripping member 45 facing the start point 1A is referred to as gripping member 45B.

[0056] 5(a), (b), (c) and 6(a), gripping member 45A is arranged so that first claw portion 51 is located on the lower side and second claw portion 52 is located on the upper side, and is raised as conveyor 44 rotates. Grip member 45B is arranged so that second claw portion 52 is located on the lower side and first claw portion 51 is located on the upper side, and is lowered as conveyor 44 rotates.

[0057] As shown in FIG. 5(a), the second claws 52 of the gripping member 45B grip the straight reinforcing bar B. As shown in FIG. 8, the straight reinforcing bar B is gripped by being stretched across the second claws 52 of multiple gripping members 45. As shown in FIG. 10, the straight reinforcing bar B rests on the curved surface 521a, the flat surface 521b, and the curved surface 522a of the locking portion 522 of the second claws 52. The straight reinforcing bar B rests mainly on the flat surface 521b. The flat surface 521b is arranged along the horizontal plane. Even if the straight reinforcing bar B moves above the second claws 52 due to vibration or the like, the upwardly extending locking portion 522 prevents the straight reinforcing bar B from falling off the second claws 52. The gripping member 45 continues to grip the straight reinforcing bar B while descending until it reaches the reinforcement position described below.

[0058] As shown in FIG. 5(b), when the gripping member 45A reaches the height of the rebar temporary restraints 25, it scoops up, acquires, and grips the straight rebar B that is stretched between the multiple rebar temporary restraints 25. The straight rebar B passes through the opening S2 of the gripping member 45A, slides from the curved surface 512a of the first claw 51 to the flat surface 511b, and is placed inside the gripping space S1. The straight rebar B is placed on the curved surface 511a, the flat surface 511b, and the curved surface 512a of the locking portion 512 of the first claw 51. The flat surface 511b is arranged along a horizontal plane. The position where the gripping member 45A can acquire the straight rebar B is defined as the acquisition position. As shown in FIG. 7, the straight rebar B is gripped by being stretched between the first claws 51 of the multiple gripping members 45A. Even if the straight line B moves above the first claw portion 51 due to vibration or the like, the locking portion 512 extending upward prevents the straight line B from falling off the first claw portion 51.

[0059] As shown in FIG. 5(c), the gripping member 45A rises further from the acquisition position, and the gripping member 45B falls further.

[0060] As shown in FIG. 6(a), just before gripping member 45A reaches the upper end of support portion 42 and gripping member 45B reaches the lower end of support portion 42, the rotation speed of conveyor 44 decreases.

[0061] 6(b), when the gripping member 45 reaches the upper end of the support part 42, the opening S2 of the gripping member 45 faces upward. The straight line B is disposed on the upper side of the base part 48. Even if the straight line B moves above the base part 48 due to vibration or the like, the locking parts 512, 522 extending upward prevent the straight line B from falling.

[0062] When the gripping member 45 reaches the lower end or the vicinity of the lower end of the support part 42, the opening S2 of the gripping member 45 faces downward, and the straight reinforcing bars B drop from the opening S2 and are arranged in the grooves 17a of the straight reinforcing bar receiving member 17. The position where the straight reinforcing bars B are arranged in the grooves 17a of the straight reinforcing bar receiving member 17 is called the reinforcement position. The reinforcement position may be a position where the opening S2 of the gripping member 45 faces straight down, or a position just before that where the opening S2 faces diagonally downward.

[0063] As shown in Figure 6(c), the gripping member 45 that has passed the upper end of the support part 42 changes direction so that the second claw part 52 faces downward. The gripping member 45 that has passed the lower end of the support part 42 changes direction so that the first claw part 51 faces downward. The above-mentioned obtaining and arranging of the straight reinforcement B is repeated.

[0064] In the reinforcement arrangement device 100 configured in this manner, the reinforcing bars A and B are inserted through the opening S2 formed between the locking portion 512 of the first claw portion 51 and the locking portion 522 of the second claw portion 52, and the reinforcing bars A and B are placed between the first claw portion 51 and the second claw portion 52. The reinforcing bars A and B can be placed on the curved surface 511a and flat surface 511b of the protruding portion 511 of the first claw portion 51 and the curved surface 512a of the locking portion 512, and on the curved surface 521a and flat surface 521b of the protruding portion 521 of the second claw portion 52 and the curved surface 522a of the locking portion 522. Because the first claw portion 51 and the second claw portion 52 are provided with the locking portions 512 and 522, respectively, the locked portions 512 and 522 prevent the placed reinforcing bars A and B from accidentally falling. Therefore, when the gripping member 45 reaches the acquisition position as the conveyor 44 rotates, the reinforcing bars A and B are positioned between the first claw portion 51 and the second claw portion 52 from the opening S2, and the reinforcing bars A and B can be properly gripped as the conveyor 44 rotates.

[0065] Furthermore, the protruding length L1 from the base 48 of the first claw 51 to the locking portion 512 is longer than the protruding length L2 from the base 48 of the second claw 52 to the locking portion 522. Therefore, when the gripping member 45 is raised and scoops up the reinforcing bars A and B, the gripping member 45 is oriented so that the first claw 51 is positioned on the lower side and the second claw 52 is positioned on the upper side, allowing the reinforcing bars A and B to be reliably scooped up.

[0066] Furthermore, the gripping member 45 can acquire the reinforcing bars A and B at the acquisition position where the first claw portion 51 is positioned lower than the second claw portion 52. The reinforcing bars A and B can be arranged at the reinforcing bar arrangement position where the opening S2 faces downward. The process from acquiring the reinforcing bars A and B to arranging them can be carried out smoothly as the conveyor 44 rotates.

[0067] Furthermore, the gripping member 45 passes the acquisition position while it is rising in accordance with the rotation of the conveyor 44. Therefore, since the gripping member 45 acquires the reinforcing bars A and B while it is rising, it can reliably acquire the reinforcing bars A and B.

[0068] Furthermore, when the lowering of the gripping member 45 is completed in accordance with the rotation of the conveyor 44, the gripping member 45 is in the reinforcement position. Therefore, the reinforcing bars A and B are dropped from the opening S2 below the conveyor 44, and since they are dropped near the straight reinforcing bar receiving member 17, they can be reliably placed in the groove 17a.

[0069] Furthermore, when the gripping member 45 is lowering as the conveyor 44 rotates, the second claw portion 52 is positioned lower than the first claw portion 51, and the reinforcing bars A and B are placed on the curved surface 521a, the flat surface 521b of the protruding portion 521 of the second claw portion of the second claw portion 52, and the curved surface 522a of the locking portion 522. Therefore, even when the gripping member 45 is lowering, the reinforcing bars A and B are prevented from falling.

[0070] In the past, multiple workers had to coordinate their efforts to move long, heavy rebars on poor footing, which created a poor working environment. However, by using the rebar gripping device 4 of the rebar placement device 100, it has become possible to perform stable rebar placement operations without losing grip of the rebar midway through the rebar placement operation, as was the case in the past.

[0071] Furthermore, unlike conventional methods, the claw itself does not have a moving part such as a spring, which improves maintainability.

[0072] By using the reinforcement arrangement device 100, it is possible to expect improvements in the above-mentioned work, increased safety, and labor savings, as well as shortening the reinforcement arrangement work time itself.

[0073] In addition, by combining the reinforcement device 100 with a QR code (registered trademark) creation system that reads reinforcement positions, etc., there is the advantage that operation data can be easily set, which can also be used to improve the work efficiency and quality of the entire reinforcement work.

[0074] The shapes and combinations of the components shown in the above-described embodiment are merely examples, and various modifications can be made based on design requirements, etc., within the scope of the present invention.

[0075] For example, in the embodiment described above, reinforcing bars A and B can be placed on the curved surface 511a and flat surface 511b of the protruding portion 511 of the first claw portion 51 and the curved surface 512a of the locking portion 512, and the curved surface 521a and flat surface 521b of the protruding portion 521 of the second claw portion 52, but this is not limited to this. The locking portions 512 and 522 extend at approximately right angles from the protrusions, and it is not necessary for the reinforcing bars A and B to be placed on the surfaces of the locking portions 512 and 522 facing the gripping space S1. It is sufficient that the reinforcing bars A and B can be placed on the surfaces of at least a portion of the protruding portion 511 of the first claw portion 51 and at least a portion of the protruding portion 521 of the second claw portion 52 facing the gripping space S1.

[0076] Furthermore, the protruding length L1 from the base 48 of the first claw 51 to the locking portion 512 is longer than the protruding length L2 from the base 48 of the second claw 52 to the locking portion 522, but is not limited to this. The protruding lengths of the pair of claws may be approximately the same.

[0077] Furthermore, the gripping member 45 passes through the acquisition position while rising in accordance with the rotation of the conveyor 44, but is not limited to this. The acquisition position at which the gripping member 45 can acquire the reinforcing bars A and B may be when the gripping member 45 reaches the upper end of the support part 42 or when it is descending. [Explanation of symbols]

[0078] 4 Rebar gripping device 44 Conveyor 44a Fixed surface 45, 45A, 45B gripping member 47 Gripping part 48 Base 51 First claw, claw 52 Second claw, claw 100 Reinforcement device 511,521 Protrusion 511a Curved surface (placing surface) 511b Flat surface (placing surface) 512,522 Locking part 521a Curved surface (placing surface) 521b Flat surface (placing surface) A curved bar (reinforced bar) B Straight bars (reinforced bars) S2 opening

Claims

1. a conveyor that is rotatable about a horizontal axis; a gripping member fixed to the conveyor, The gripping member is a base provided on a fixed surface of the conveyor; A pair of claws are provided on the base, face each other, and are capable of gripping a reinforcing bar. The claw portion is a protrusion provided on the base so as to protrude in a direction away from the fixing surface; a locking portion extending from the protruding portion toward the opposing claw portion, The reinforcing bar can be placed on a placement surface of the protrusion facing the opposing claw portion, A reinforcing bar gripping device in which an opening through which the reinforcing bar can be inserted is formed between the locking portions of the pair of claws.

2. A rebar gripping device as described in claim 1, wherein the protruding length from the base to the engaging portion of a first claw portion of the pair of claw portions is longer than the protruding length from the base to the engaging portion of a second claw portion of the pair of claw portions.

3. The gripping member is The first claw portion is disposed below the second claw portion, and the reinforcing bar is acquired and placed on the placement surface of the first claw portion from an acquisition position. The opening is arranged so as to face downward, and the reinforcing bar is dropped from the opening to a reinforcing bar arrangement position, The reinforcing bar gripping device according to claim 2, which is movable in accordance with the rotation of the conveyor.

4. The gripping member is The reinforcing bar gripping device according to claim 3, wherein the reinforcing bar gripping device passes through the acquisition position while ascending as the conveyor rotates.

5. The gripping member is The reinforcing bar gripping device according to claim 3, wherein the reinforcing bar gripping device reaches the reinforcing bar arrangement position when the lowering of the conveyor is completed as the conveyor rotates.

6. The gripping member is A reinforcing bar gripping device as described in claim 2, wherein when the conveyor is descending as it rotates, the second claw portion is positioned lower than the first claw portion, and the reinforcing bar is placed on the loading surface of the second claw portion.

Images