JP2000159333A - Bar feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for smoothly feeding a predetermined number of bars aligned to an inclined feeding part and enabling the bars to be surely taken out one by one. SOLUTION: The inside of a hopper 10 is divided into a large chamber 10A and a small chamber 10B and a first reinforcement push-up mechanism 14 capable of feeding a predetermined number of reinforcements 2 in the small chamber to an inclined feeding part 12 is provided. The reinforcements are fed one by one to a reinforcement takeout part 27 by a second reinforcement push-up mechanism 35 installed between the front end of the inclined feeding part and the rear end of the reinforcement takeout part 27, and a stopper part 30, a positioning mechanism, and a reinforcement sensor 34 are provided at the end of the reinforcement takeout part 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar feeder, and more particularly, a bar feeder, for example, a reinforcing bar for a concrete product, is supplied in a predetermined number to a rebar inlet at the top of an inclined feeder. The present invention relates to a device and a bar feeder for feeding the aligned bars one by one to a next welding step at an accurate position.

[0002]

2. Description of the Related Art For example, a reinforcing material buried inside for reinforcement, such as a gutter cover, is composed by manually forming main bars and horizontal bars in a grid pattern and then projecting the intersection of the main bars and horizontal bars by projection welding. Welded by machine. However, it is inefficient because it takes a great deal of labor and time to perform all of these steps by hand, and a considerable amount of skill is required to obtain a high quality product.

In order to solve such a conventional problem,
For example, Japanese Patent Application Laid-Open No. H8-243763 discloses an invention for automatically performing these operations. This sent a large amount of bar arrangement material piled up on a stock table provided on one side of the horizontal streak arrangement and supply unit to a downwardly sloping entrance fixing table installed to the right of the drawing with the stock table. After that, the reinforcing bars on the entrance fixing base are pushed up one by one by the push-up body to the first delivery fixing base, and thereafter, the reinforcing bars are welded through the second delivery fixing base. is there.

[0004]

However, Japanese Patent Application Laid-Open No. Hei 8
The stock table in the automatic welding machine disclosed in Japanese Patent No. 243763 is considered to be a belt conveyor in the drawing, but when a large amount of reinforcing bars are placed on this stock table, the entrance fixing table is required. Since there is no alignment mechanism for arranging the reinforcing bars one by one before, the reinforcing bars are pushed out to the entrance fixing base one after another, and the reinforcing bars easily cross each other. There is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The inside of a hopper for storing a bar is divided by a partition plate into two large and small rooms. The load on the first rebar push-up mechanism that supplies the slant supply unit to the slant supply unit is reduced, and the operation is smoothed. And a second rebar push-up mechanism installed immediately before the slant supply section, so that the bars can be taken out one at a time by the rebar positioning mechanism. It is an object of the present invention to provide a device capable of performing the above.

[0006]

In order to achieve the above-mentioned object, a first invention of the present application is to push up a bar in a hopper and to align a predetermined number of bars in a state of being aligned with a rebar inlet at the top of the inclined supply unit. A supply room, wherein the inside of the hopper is partitioned by a partition plate, and a large room for storing a large number of bars at the rear in the moving direction of the bars, and a small room for storing a small number of rebars at the front. The partition is formed so that the bar can pass through the lower part of the partition plate, and a rod in the small room is provided between the front surface of the small room of the hopper and the rear surface of the inclined supply unit. When a first rebar pushing-up mechanism for pushing up the material and supplying it to the rebar inlet of the inclined supply unit is provided, the upper portion of the first rebar pushing-up mechanism is pushed up by the first rebar pushing-up mechanism. A reinforcing bar elimination mechanism is provided for excluding a predetermined number of bars from the small chamber of the hopper. It is bar feeding device according to claim.

According to a second aspect of the present invention, there is provided an apparatus for supplying rods descending from an inclined supply unit to a rebar take-out unit one by one, wherein the inclined supply unit is moved down near a rear end of the inclined supply unit. When the rebar take-out part for stopping the bar material to be connected is connected, the bar material of the inclined supply part is fed one by one to the rebar take-out part between the rear end of the rebar take-out part and the front end of the inclined supply part. A second rebar push-up mechanism to be supplied is installed, and a bar stopper and a positioning mechanism are provided at the tip of the rebar take-out portion, respectively. At the same time, a bar is attached to the stopper at the tip of the rebar take-out portion. A bar supply device provided with a rebar sensor for detecting the presence of the bar.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in FIGS.
Reference numeral 1 denotes an industrial handling robot, which is provided around the handling robot 1 in a clockwise direction within a range in which its arm portion moves, in a clockwise direction. Reinforcing bar feeder 5 for 4
And an automatic welding machine 6 for welding the main reinforcing bar 2 and the horizontal bar 4 assembled in a lattice shape, a robot control panel 7 of the handling robot 1, and a reinforcing mesh M including the welded main bar 2 and the horizontal bar 4 are placed. A pallet 8 and its conveyor 9 are arranged.

Here, since the reinforcing bar feeding machine 3 for the main bar 2 and the reinforcing bar feeding machine 5 for the horizontal bar 4 according to the present invention have the same structure, only the reinforcing bar feeding machine 3 for the main bar 2 will be described below. To explain, 10 is a hopper for accommodating a large number of main rebars 2 and lateral rebars 4 (hereinafter referred to as rebars 2 when it is not necessary to distinguish them). A large room 10A that can store a large number of rebars 2 located in a direction opposite to the moving direction and a small room that can store a small number of rebars 2 located in the moving direction by a partition plate 11 that is orthogonal to the moving direction. The room 10B is divided into two rooms. The two rooms 10A and 10B communicate with each other so that the reinforcing bar 2 can pass through the lower portion 11A of the partition plate 11, and the front surface of the small room 10B is open. The hopper 1
A large number of rebars 2 in 0 are accommodated in a direction in which the axis of the rebars 2 is perpendicular to the moving direction of the rebars 2.

Reference numeral 12 denotes an inclined supply section of the reinforcing bar 2, and a side wall 13 at a rear portion thereof and the small room 10B in the hopper 10.
A first rebar push-up mechanism 14 that pushes up the rebar 2 in the small room 10B is provided between the first rebar push-up mechanism 14 and the front opening surface. The first rebar push-up mechanism 14 mainly includes a push-up plate 15 erected in contact with the opening surface of the small room 10B, a motor 16 for driving the push-up plate 15 up and down, and a crank 17. The rebar 2 in the small room 10B is placed on the upper surface of the push-up plate 15, and the inclined surface 12A of the inclined supply unit 12 is placed.
Is fed to the reinforcing bar feed port 18 which is the topmost portion.

In order to raise and lower the push-up plate 15 accurately, an auxiliary plate 15A is fixed to the back surface of the push-up plate 15 (toward the inclined supply unit 12). A pair of left and right slot wheels 19, 19 are provided rotatably with a distance therebetween. On the other hand, a rail 21 to which the pair of right and left groove wheels 19, 19 are rotatably joined is vertically fixed to an upright plate 20 which is fixed upright in parallel with the auxiliary plate 15A. Then, the upper surface 15 of the push-up plate 15
B is formed by an inclined surface that descends toward the side wall 13 of the inclined supply unit 12, so that the reinforcing bar 2 placed on the upper surface of the push-up plate 15 does not accidentally drop. Also, in the drawing, only one reinforcing bar 2 is placed on the upper surface 15B of the push-up plate 15, but if the thickness of the push-up plate 15 is at least twice the diameter of the reinforcing bar 2, two or more at a time can be obtained. Needless to say, a reinforcing bar can be mounted.

Reference numeral 22 denotes a rebar removing mechanism provided at a position immediately before the rebar inlet 18 in the inclined supply section 12. The rebar removing mechanism 22 includes left and right side surfaces which coincide with the axial direction of the reinforcing bar 2 of the inclined supply section 12. When the removing claws 23, 23 are provided rotatably on the lower end, the lower inclined edges 2 of the removing claws 23, 23 are provided.
The tip of 3A is urged by a tension spring 24 set to be weaker than the lifting force of the push-up plate 15 so that the tip of the 3A slightly comes out of the side wall 13 of the inclined supply unit 12. Note that the inclined supply unit 12 connects the pair of inclined strips 25, 25 to the reinforcing bar 2.
Is set to be slightly narrower than the length of, and is formed by inclining at a predetermined angle toward the front end (opposite side wall 13), and the inclined surface 12A is formed.
Control plate 26 so that the rebar 2 is aligned in one layer
Are arranged in parallel with each other at a distance from the inclined surface 12A.

Numeral 27 denotes a rebar take-out portion which is connected to the inclined supply portion 12 at the same angle in proximity to the front end of the inclined supply portion 12. It is formed by the strips 28, 28 for inclination,
The inclined surface 27A is the inclined surface 12A of the inclined supply unit 12.
Is set higher by a width than the diameter of the reinforcing bar 2. Therefore, the rebar 2 descending from the inclined supply unit 12 stops at the rear wall 29 of the rebar take-out unit 27.

Reference numeral 30 denotes a stopper for stopping the reinforcing bar 2,
It is provided at the tip of each of the slant strips 28, 28 of the rebar take-out portion 27, and a positioning mechanism 31 is attached near one of the slant strips 28. This positioning mechanism 3
1 is to accurately position the take-out position of the reinforcing bar 2,
And a contact stop plate 32 to which one end of the reinforcing bar 2 comes into contact with one end side of one of the slanting strips 28 to find a reinforcing bar (an incorrect reinforcing bar) which is longer or shorter than a predetermined length. Is fixed, the plunger 33 is fixed to the tip side surface of the other band plate 28, and the tip 33 </ b> A of the piston comes into contact with the other end of the reinforcing bar 2.

Reference numeral 34 denotes a reinforcing bar sensor such as a limit switch. When the reinforcing bar 2 comes into contact with the contact line 34A, it is possible to confirm that the reinforcing bar 2 is present at the stopper 30 of the reinforcing bar take-out portion 27. . Reference numeral 35 denotes a second rebar push-up mechanism, which is provided between the front end of the inclined supply section 12 and the rebar take-out section 2.
7 and the push-up plate 36
Is configured to be moved up and down between the inclined surface 12A of the inclined supply unit 12 and the inclined surface 27A of the rebar take-out unit 27 by the guide cylinder 37, and the inclined supply unit 12 The rebar 2 is formed so as to be fed out to the rebar take-out portion 27 one by one.

Next, the operation of the above embodiment will be described. First, a large number of main reinforcing bars 2 are provided in the large room 10A of the hopper 10 in the reinforcing bar supplying machine 3 for the main reinforcing bars, and a small number of main reinforcing bars are provided in the small room 10B. Main stowage 2 is stored respectively,
Similarly, the large room 10A and the small room 10B of the hopper 10 in the horizontal bar
And a small number of horizontal streaks 4 are respectively stored. In addition,
The following operations are all performed by sequence control.

Therefore, when the work is started, FIG.
As shown in the figure, the push-up plate 15 of the first rebar push-up mechanism 14
The upper surface 15B of the small room 10B is lowered by the motor 16 and the crank 17 to the position of the bottom plate of the small room 10B and then raised. As a result, on the upper surface 15B of the push-up plate 15, a plurality of main reinforcements 2 are placed in a tandem state.
2, when the rebar removing mechanism 22 immediately before is reached,
As shown in FIG. 6 (II), the lower slanted edge 23A of the third main bar 2 sequentially falls into the small room 10B from the uppermost main bar 2. Then, a predetermined number (only one is illustrated in III of FIG. 6) of main bars 2 remaining on the upper surface 15 </ b> B of the push-up plate 15 is fed into the rebar inlet 18 of the inclined supply unit 12. By providing the rebar elimination mechanism 22 immediately before the inclined supply unit 12, the number of main bars 2 to be sent out is limited, and the inclined supply unit 1 is provided.
2 can be fed to the inclined surface 12 </ b> A in an aligned state without being clogged in the rebar inlet 18.

In this manner, the main reinforcing bars 2 in the small room 10B of the hopper 10 are sequentially pushed up by the inclined supply unit 12, and the inclined supply unit 12 is provided with the reinforcing bar inlet 1 thereof.
8 to the rear wall 29 of the reinforcing bar take-out portion 27 from the inclined surface 27A
Many main bars 2 are arranged in a more densely arranged state. When the number of the main bars 2 in the small room 10B decreases, replenishment is performed from the large room 10A through the lower portion 11A of the partition plate 11. By providing the small room 10B in this manner, the heavy pressure on the push-up plate 15 due to the large number of main muscles 2 is reduced, so that the lifting and lowering operation of the push-up plate 15 can be made smooth and the load on the motor 16 can be reduced.

Further, the main rebar 2 located on the rear wall 29 of the rebar take-out portion 27 and on the upper surface of the push-up plate 36 of the second rebar push-up mechanism 35 is moved by the guide cylinder 37 to the rear wall 2.
9 and is sent out one by one to the rebar take-out part 27, and descends the inclined surface 27A to contact line 34A of the rebar sensor 34.
And stops at the position of the stopper portion 30. Thereby, it is confirmed that the main bar 2 exists at the position of the stopper portion 30. The positioning mechanism 31 is actuated by the confirmation signal of the reinforcing bar sensor 34, and the tip 33A of the piston of the plunger 33 momentarily pushes out one end of the main bar 2, and the other end of the reinforcing bar 2 is connected to the contact stop plate 32. , It is possible to find an illegal reinforcing bar different from the predetermined length. Although not shown, the illegal reinforcing bar removing mechanism is provided in the vicinity of the reinforcing bar removing portion 27.

Then, as described later, the rebar take-out portion 27
When the main bar 2 is taken out from the rebar, the next main bar is
7 and the above operation is repeated. That is, the tip of the arm of the handling robot 1 extends to the rebar supply machine 3 for the main rebar according to the presence confirmation signal of the rebar sensor 34,
The two main bars 2 are held in parallel by the holding claws. When this is completed, the arm of the handling robot 1 rotates and stops above the gauge plate 38 at the rebar receiving position of the automatic welding machine 6, and the two main bars 2 sandwiched are two of the gauge bars 38. Fall into the groove for the main muscle. By performing such an operation twice, the main bars 2 are respectively housed in the four main-slot grooves, and by the same operation, the horizontal muscle feeding machine 5 is used.
Is stored in the groove for the horizontal line of the gauge board 38. As a result, the horizontal streak 4 is placed on the main streak 2 in a lattice shape.

FIGS. 8 (I) to 8 (V) show different embodiments in which the tip of the rebar take-out portion 27 is different. That is, (I) shows an example in which one rebar sensor 34 having a contact line 34A is provided between the two inclined strips 28 constituting the rebar take-out portion 27. However, in this case, the presence of the reinforcing bar 2 stopped by the stopper portion 30 may be sensed even in a deformed posture such as tilting.
As shown in (II), by providing two rebar sensors 34, the presence of the rebar 2 in the deformed posture is not recognized.

Further, (III) shows the stopper portions 3 of the two inclined strips 28, 28 constituting the rebar take-out portion 27.
These electrodes (30, 30) are used as electrodes 0 and 30, respectively.
Is short-circuited by the reinforcing bar 2 so that the reinforcing bar 2 in the normal posture and the deformed posture can be distinguished. In the figure, T is a transformer, the secondary side of which is connected to the electrode stopper via a full-wave rectifier S. OP is an operational amplifier, A is an amplifier, and X is a sensing relay.

Further, in (IV), the one stopper portion 30 and the contact stop plate 32 are used as electrodes, respectively, and the other points are the same as (III).
Further, what is shown in FIG.
In order to detect whether or not the rebar 2 located at the stopper portions 30 and 30 has contacted the abutment stop plate 32 by the plunger 33 of the positioning mechanism 31, the end of the rebar 2 is provided on the abutment stop plate 32 side. Contact sensor 3 (not shown) that operates upon contact
9 is provided.

[0024]

According to the first aspect of the present invention, since the bar feeder according to the present invention is configured as described above, the heavy pressure on the first rebar push-up mechanism due to a large amount of rebar is reduced. (1) When the lifting and lowering operation of the rebar lifting mechanism becomes smooth,
Since only a predetermined number of bars are sent out to the inclined supply unit by the rebar removing mechanism, the bars supplied to the inclined supply unit can be supplied in an aligned state. According to the second aspect of the present invention, the bars can be reliably taken out one by one by the second rebar push-up mechanism provided immediately before the rebar take-out portion, and the rebar positioning mechanism and the rebar sensor are used. In addition, if the take-out position of the reinforcing bar is always accurately determined, it is possible to determine an incorrect reinforcing bar different from a reinforcing bar having a predetermined length, and it is possible to efficiently manufacture a high-quality member.

[Brief description of the drawings]

FIG. 1 is an overall layout diagram showing an installation state of a device of the present invention.

FIG. 2 is a side view in which a part of a reinforcing bar feeding machine is cut.

FIG. 3 is a plan view of a reinforcing bar feeding machine.

FIG. 4 is an operation explanatory front view of a first rebar push-up mechanism.

FIG. 5 is an operation explanatory rear view in which a part of the first rebar pushing-up mechanism is cut away.

FIG. 6 is an explanatory diagram of the operation of the rebar removing mechanism.

FIG. 7 is a side view for explaining the operation of the rebar take-out section.

FIG. 8 is a perspective view of a different embodiment of the positioning mechanism.

[Explanation of symbols]

 2 Reinforcing Bar 10 Hopper 10A Large Room 10B Small Room 11 Partition Plate 12 Inclined Supply Unit 14 First Rebar Push-Up Mechanism 15 Push-Up Plate 15B Upper Surface 22 Rebar Bar Removal Mechanism 27 Rebar Bar Removal Unit 30 Stopper Unit 31 Positioning Mechanism 34 Rebar Sensor 35 Second Rebar Push-up mechanism 36 Push-up plate

Claims (6)

[Claims] 1. An apparatus for pushing up a rod in a hopper and supplying a predetermined number of rods in an aligned state to a rebar inlet at the top of an inclined supply section, wherein the inside of the hopper is partitioned by a partition plate, and When divided into a large room for storing a large number of bars at the rear in the moving direction and a small room for storing a small number of reinforcing bars at the front, the bars can pass through the lower part of the partition plate. Between the front surface of the small room of the hopper and the rear surface of the inclined supply unit, the first reinforcing bar pushing up a bar in the small room and supplying the rod material to the rebar inlet of the inclined supply unit. When the mechanism is provided, a rebar removing mechanism is provided at an upper position of the first rebar pushing-up mechanism for removing the rods other than a predetermined number pushed up by the first rebar pushing-up mechanism into the small chamber of the hopper. A bar feeder, characterized in that: 2. The first rebar push-up mechanism comprises a push-up plate erected in contact with an opening surface on a front surface of a small room, a motor and a crank for driving the push-up plate so as to be able to move up and down, and an upper surface of the push-up plate. 2. The bar feeder according to claim 1, wherein the slanting portion is formed as an inclined surface which is inclined downward toward the rear surface side of the inclined supply portion. 3. The rebar removing mechanism includes a pair of left and right removing claws rotatably provided on both left and right side surfaces coincident with the axial direction of the bar of the inclined supply unit, and a lower inclined edge of the removing claw. 3. The bar feeder according to claim 1, wherein the end of the rod is urged by a tension spring set to be weaker than the lifting force of the push-up plate so that the tip of the pusher slightly protrudes from the side wall of the inclined feeder. 4. An apparatus for supplying rods descending an inclined supply section to a rebar take-out section one by one to stop a rod descending the inclined supply section near a rear end of the inclined supply section. A second reinforcing bar for supplying the bars of the inclined supply unit to the rebar extraction unit one by one between the rear end of the reinforcing bar extraction unit and the front end of the inclined supply unit when the reinforcing bar extraction unit is connected. A push-up mechanism is installed, and a bar stopper and a positioning mechanism are provided at the tip of the rebar take-out portion, respectively.At the end of the rebar take-out portion, a bar is present at the stopper portion. A bar supply device provided with a rebar sensor for sensing. 5. A second rebar push-up mechanism comprising: a push-up plate installed between a front end of an inclined supply section and a rear wall of a rebar take-out section; and a slope between the inclined supply section and the rebar take-out section. 5. The bar feeder according to claim 4, wherein the rod is moved up and down by a guide cylinder. 6. A contact stop plate in which one end of a rod fixed to a tip side surface of one of the inclined strips comes into contact with a positioning mechanism,
A plunger fixed to the tip side surface of the other inclined strip,
6. The bar supply device according to claim 4, wherein a tip of a piston of the plunger is configured to contact the other end of the bar.