JPS58154429A - Spiral hoop manufacturing device - Google Patents

Abstract

PURPOSE:To promote the efficiency of manufacture of spiral hoops used for reinforced concrete etc., by attaching four bending mechanisms to a rotary mechanism and enabling bending bar materials of specified length successively at right angles by rotation of the rotary mechanism. CONSTITUTION:A titled device consists of a rotary mechanism A that rotates around a main shaft 2 on the base 1, four bending mechanisms B3, B4 attached to the mechanism A, and a cam 48 fixed to the base 1. The mechanism A consists of a ring frame made up of rings 5a, 5c supported on the shaft 2 by a spoke 4, four sets of guide frames 6-9, and slide blocks 14, 15. Above-mentioned mechanisms B3, B4 are made up of a movable head 24, a hoop supporting mechanism 25, a correcting shaft and an extruding shaft 27, and pressure 50 of a spring is applied to the shaft 27. The correcting shaft and shaft 27 are pushed out to the front of the movable head 24. The correcting shaft is provided with a device to thrust the bar against a bending die, and the shaft 27 has a device to separate the bar from the die.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention efficiently manufactures hoops used together with main reinforcing bars in the construction of reinforced concrete structures, especially spiral hoops in which many of the hoops are continuous in a spiral shape. There is a device for this purpose.

By the way, the above-mentioned hoop is usually shaped by bending reinforcing bar material into a square or rectangular shape, so it is difficult to manufacture a spiral hoop in the form of a large number of continuous reinforcing bars as shown in Fig. 1. In this case, it is necessary to bend the long bar at a right angle every predetermined length. A known bender may have been used to bend the bar.

The work is intermittent, and the handling of the supplied bar material and the bent and formed finished part is troublesome.
The above-mentioned spiral hoop cannot be manufactured efficiently.

The present invention deals with the above-mentioned actual situation regarding spiral hoops, enables the efficient manufacture of spiral hoops, and allows the long bar material to be drawn in continuously by the rotation of a rotary mechanism to adjust its rotational movement and By the operation of the bending mechanism, it is bent so as to be bent at right angles in each predetermined length.

Hereinafter, an embodiment shown in the drawings will be described in detail.

First, in Figures 2 and 3, 1 is the base of the entire device,
Reference numeral 2 designates a main shaft that is rotatably supported on this base and projects horizontally forward, and 3 is a drive shaft that rotates the main shaft at a constant speed, for example, in a counterclockwise direction when viewed from the front.

A rotary mechanism is provided on the front end of the main shaft 2, which rotates in a vertical plane about the shaft. This mechanism consists of a large-diameter ring frame consisting of a rear ring 5a fixedly supported on the main shaft 2 by a plurality of spokes 4, and a front ring 5c integrated with the ring by several stays 5b. 5 and the front ring 5c of the frame.
c A total of four sets of guide frames 6 , 7 , 8 , 9 , each consisting of two parallel guide frames spanned in the radial direction from the turning center.
! : Chill. Each of these guide frames is connected to the ring frame 5 through the odd numbered guide frames 6 and 8 through the joint 10 and the even numbered ones 7 and 9 through the joint 11.
are connected and integrated in the diametrical direction, and both of their joints (10, 11) are rotatably fixed to the front end of the main shaft 3. Further, at the outer end of each guide frame 6, 'i', 8.9, slide blocks 12, 13, 14, which may be rotated in the circumferential direction along the link frame 5 at any time, are provided.
．． 15 are attached to the front ring 5c of the ring frame, and correspondingly, five circumferential arcuate long holes 16.1' and 18.19 are provided in the front ring 5c of the ring frame. Each of these blocks 12 to 15 is individually and releasably fixed to the ring frame 5 using regular screws 20, 21, 22, and 23 passed through each of the long holes 16 to 19 described above. The guide frames 6 to 9 described above are fixed to the ring frame 5.

The rotating rotary mechanism system includes a total of four bending mechanisms Bl, one for each guide frame 6 to 9,
B2. Bl and B4 are provided. Each of these mechanisms B1 to B4 is configured as follows.

For example, as shown in FIGS. 4 to 6, the pendiff mechanism Bl provided in the guide frame 6 is movable and is located between a pair of guide frames 6 and 6 and is movable along the frames in the radial direction of the ring frame 5. A hoop support rod 25 is installed in the head so as to protrude forward from the front surface of the head parallel to the main shaft 2t, and a hoop support rod 25 is fixed to the base of the support rod on the front surface of the head. A bending die 26 having a die surface, and an extrusion shaft 27 disposed immediately near the middle of the arcuate die surface of this bending die.
, and two correction shafts 28 and 29 disposed immediately adjacent to each other on both sides of the shaft, facing the end of the arcuate mold surface. However, the above-mentioned extrusion shaft 27 and straightening shaft 28, 29 are
Both are inserted into through-holes 30.degree. 31.32 formed in the movable head 24 parallel to the main shaft 2 so as to be slidable in the axial direction. Among these shafts, the extrusion shaft 2''I has a front end portion facing the bending mold 26 cut off and has a stepped portion 33 facing forward, and normally the movable head extends up to the front end. 24 into the through hole 30 so as to be sunk one inch below the front surface of the hole 24.

Each through hole 3 into which a correction shaft 28, 29 is inserted
In the front end of 1.32 a working die 34 or 35 is supported by pins 36 or 37.

Each of these working molds 34, 35 is normally biased by a spring 38 or 39, and fits into the front end of each through hole 31 or 32 in such a manner that it straddles the hole, and is brought closer to the bending mold 26 as necessary. Therefore, the movable head 24 can be rotated and protruded toward the front surface thereof. However, the above-mentioned pressure claws 34 and 35 are arranged at an angle of about 90 degrees from each other and can be rotated and protruded in order to bend the rod material at right angles to the arcuate mold surface of the bending mold 26. This is done once so that the bending die 267\ is approached from each position. Furthermore, each straightening shaft 2'8.29 is provided with a roller 40 or 41 at its front end that rolls into contact with the back side of the above-mentioned processing die 34.35, and normally has a through hole 31 or 41, respectively, depending on the above-mentioned posture of the winter melon. 32. Furthermore, the bending mechanism 1g, Ili, B
4 has substantially the same structure as the mechanism Bl described above, and therefore operates in exactly the same way. However, only in the mechanism Bl, a holder 42 is added near the bending die 26 for temporarily holding the tip of the supplied bar.

On the other hand, behind each of the guide frames 6 to 9 in the rotary mechanism system described above, one set of two feed screws 43 are arranged parallel to each other, and each slide block 12 to 15 has one set of feed screws 43. One group of adjustment gears 44 for simultaneously rotating the sets of feed screws 43, 43 is built-in. A lamp stand 45 is screwed into each set of feed screws 43 so as to be slidable along the rear side of the guide frame, and a lamp stand 45 is screwed onto each set of the feed screws 43 so as to be slidable along the rear side of the guide frame. fan-shaped piece 2
4a is provided. These fan-shaped pieces 24a and the clamp base 45 are releasably coupled with a set screw 47 passed through the circular arc-shaped long hole 46 of the former, and the movable head \ is held between the guide frame from the front and rear.

24 is fixed to the frame.

Also, behind the entire rotary mechanism A, there is a cam 4 for sequentially operating each of the bending mechanisms B and %B4.
A day is set. In the illustrated example, the cam 48 has a disk shape centered on the main shaft 2.

Be careful not to interfere with the rotation of the shaft, and perform the above procedure
l (D It is fixed on the front.Moreover, the cam 4 here
The cam is in the form of an end cam with the front surface as a cam surface, and therefore, the cam surface is connected to the reference surface 48a and the cam surface that is higher than the reference surface 48a by the lift bt. The second top surface 48c is higher by one lift ht.

These surfaces are arranged, for example, in the order of 48a, 48b, 48C, and 48a in the counterclockwise direction when viewed from the front, and fan-shaped from the center to the periphery, and the reference surface 48a is the widest and extends approximately 180 mm on the right side. Occupying a range of degrees, the first
The top surface 48b is the next widest, occupying an area of approximately 140 degrees on the left side, and the second top surface 48c is the narrowest, occupying an area of approximately 40 degrees on the bottom side. With respect to the cam surface of the 4th cam, the extrusion shaft 27 of each bending mechanism B1 to B4
The straightening shafts 28 and 29 each have a roller 49 at the rear end thereof, and each of the rollers is arranged to roll in the circumferential direction of the cam surface.
In this orientation, it is pressed against the cam surface by individual springs 50. The relationship between each of these axes 27 to 29 and each of the surfaces 48a to 48c of the cam 4 is determined as follows. That is, when the extrusion shaft 2+7 comes into contact with the reference surface 48a, it does not protrude from the front surface of the movable head 24 at all, and when it comes into contact with the first top surface 48b, it is pushed between the cores and protrudes from the front surface of the head, but it does not extend up to the stepped portion 33. However, when it comes into contact with the second top surface 48c, there is a further t between the nuclei.
It is pushed so that even the stepped portion 33 is pushed out. In addition, when the straightening shafts 28, 29 contact the reference surface 48a, the processing molds 34, 35 do not rotate and protrude from the front surface of the movable head 24, and when they contact the first top surface 48b, they are pushed between the cores and are used for each processing. The molds 34 and 35 are moved so as to rotate and protrude from the front surface of the head, and the second top surface 48c is
When touching the stem, the shaft is pushed further between the cores, keeping the winter melon in a protruding state, while only the axis itself is allowed to move further.

In addition, 00 in the figure is a completed spiral hoop.

C' is a bar material for making the hoop.

In the above configuration, each set of guide frames 6, 'i', 8.9 in the rotary mechanism A are fixed at 90 degree intervals as shown in FIG.
The movable heads 24 of the B goose, Bl, B, all maintain the same distance from the rotation center of the ring frame 5,
It is assumed that it is fixed to each guide frame 6 to 9, respectively. In addition, each movable head 24 at this time has a hoop support rod 25 and an extrusion shaft 27 arranged in the radial direction of the ring frame 5, as shown in FIG.
29 in a direction perpendicular to its radial direction.

Therefore, first, with the rotary mechanism A stopped in order to make each of the bending mechanisms B1 to B4 stand still at the positions shown in FIG. The tip part of ' is placed on the front side of the movable head 24, slightly bent along the curved shape 26, and captured by the bow 1/J dar 42. In addition, the extrusion shaft 27 and the correction shaft 2 in the bending mechanism B1 at this time
8.29 is in contact with the reference surface 48a of the cam 48 as shown in FIG. 7(1), so it does not protrude to the front of the movable head 24 as shown in FIG. Pressure mold 34
Therefore, the same 35 is not made to protrude to the front surface of the head.

In this state, when the rotary mechanism A is continuously rotated in the direction shown by the arrow (a) in FIG. 2, the bar C' is continuously rotated approximately 1 From the above-mentioned bending mechanism B that is drawn in and rotates around the main shaft 2, other bedding mechanisms R*, Ba, and B that rotate in the same manner
4, and is sequentially wound around each bending die 26. At this time, if sufficient back tension is applied to the bar material C' drawn in as described above, the bar material is successively bent at right angles by the bending dies 26 provided in each of the mechanisms B1 to B4. However, due to the rigidity and plasticity of this bar material, the bending die 2
6, it is bent larger than the arc radius of the type, and 1
1 Before and after that, it tries to curve into a gentle arc.

Therefore, the bent bar 0' tends to remain in contact with only the middle of the arcuate die surface of the bending die 261.

On the other hand, the two extrusion shafts and the straightening shafts 28 and 29 provided in each of the above-mentioned bending mechanisms B and %B4 are the rotary mechanism A
As the cam rotates, the cam behind it is operated as follows in four days. For example, when observing bending mechanism B, the extrusion shaft 27 and straightening @28.
However, if the cam is in contact with the reference surface 48a as shown in FIG. 7(1), then each of the above-mentioned shafts 27 to 2
9 is in the most retracted position from the front surface of the movable head 24, as also shown in FIG. 5.6, and therefore does not protrude from the front surface, nor does it cause the pressure molds 34, 35 to protrude.

Next, this mechanism B1 pivots and its extrusion shaft 2'7
Assuming that the straightening shafts 28 and 29 ride on the first top surface 48b of the cam as shown in FIG. It will be done. Then, the extrusion shaft 27 protrudes from the front surface of the movable head 24, as shown by the chain line in FIG.
However, at this point, even the stepped portion 33 has not yet been protruded, so the portion of the bar 0' bent to the extent described above, which is closest to the axis, that is, the circular arc shape of the bending die 261. No action is taken on the part that is in contact with the middle of the mold surface, and therefore the rod remains at the position shown by the solid line in FIG. On the other hand, one of the correction shafts protrudes from the front surface of the movable head 24, as shown by the chain line in FIG.
The pressure mold 34 is rotated by the roller 40 at the front end against the spring 38, and it is caused to protrude from the front surface of the head and brought close to the bending mold 26, as shown by the chain line. Therefore, the part of the bar 0' that is closest to the pressing die 341, that is, the part that is near one end of the arc-shaped die surface of the bending die 26) and is slightly away from the die surface, is pushed towards
It moves in the direction of arrow (c) from the position shown by the solid line in FIG. 6 to the position shown by the chain line and is pressed against the mold surface.

In addition, the other correction shaft 29 is operated in the same manner (in order to rotate and project the pressurizing mold 35 toward the front surface of the movable head 24, the bar C'
The closest part of the nail 1 is bent by the nail 2.
It is pressed near the other end of the arcuate mold surface at 6-.

However, in relation to the cam surface shape of the cam 48, the straightening shafts 28 and 29 operate in order starting from the one located at the optical position with respect to the turning direction.Therefore, first, the pressurizing mold 34 is moved to F2, and the straightening shaft 29 is moved to the bar C'. It is then pressed onto the bending die 26. Therefore, the bar 0' closely follows the arc-shaped mold surface of the bending mold 26 and is bent at right angles without any difficulty.

The bedding mechanism B that has operated in this manner rotates again, and the extrusion shaft 27 and the straightening shafts 28 and 29 are now moved to the second top surface 48C of the cam as shown in FIG. 1(3). If it runs over, each of those shafts 27 to 29 will be pushed further forward by an amount corresponding to the cam lift h2. However, at this time, each of the correction shafts 28 and 29 only increases the amount of protrusion from the front surface of the movable head 24, and does not impart any new movement to the pressure molds 34 and 35, which are already rotatably protruding. It does not have any particular effect on material 0'.

However, the amount of protrusion of the extrusion shaft 2'7 increases and the step part 3
In order to make the front wall of the movable rod 24 protrude, the stepped portion 33 acts directly on the bent bar a I to move the bar as shown in FIG. The rod is moved in the direction of the arrow from the position shown by the solid line to the position shown by the chain line to create enough room to make room for the front surface of the head and to wrap a new bar material around the bending mold 26.

After that, when the bending mechanism Bl further pivots and the extrusion shaft 27 and the correction shafts 28, 29 return to the cam reference surface 48a, the respective shafts 27-29.

As shown in FIG. 7(4), the cams are pushed back by the respective springs 50 by an amount corresponding to the cam lifts h and +htl, and contact the reference surface again. Therefore, the front ends of each of the shafts 27 to 29 are pulled back under the front surface of the movable head 24, and the pressurizing molds 34, 35 are also rotated back under the front surface of the head under the action of the springs 38, 39, and bent. Only the bar 0' that has been
It is left on the mold surface of the bending mold 26 at a slight distance from the curved surface of the head. In addition.

The bending mechanism Bt, which has returned to its old state after 1 in this way, has 1' newly wrapped around the bending die 26 of the bar C',
:′.

Repeat the same operation for the other parts.

By the way, the operation of the bending machine Yokoyama as described above is
The other bedding mechanisms Bg, Bg and B4t work in exactly the same way, but with a certain time delay. Therefore, the bar C' has its respective mechanisms B1 to n4
t, so that each predetermined length is sequentially bent at a right angle,
The bent portion continues in a spiral pattern and is released from the bending die 26 one after another and pushed out onto the hoop support rod 25, so if it is cut into the required number of turns, it will look like the one shown in Figure 1. A spiral hoop 0 is obtained.

On the other hand, the spiral produced by straining in this way--y
'c has a square end face shape. Therefore, when trying to manufacture a spiral hoop with a rectangular end face shape, it is sufficient to change the distance between adjacent bending mechanisms. That is, in the illustrated example, the guide frame 6.8 is connected and integrated via the joint 7 and the joint 11, and
Since the intersecting angle formed by the integrated guide frame 9 is 90 degrees, the distances between adjacent bending mechanisms are all equal. Therefore, by changing this intersection angle, for example, between guide frames 6.7 and 8.9, it is 90 degrees or more, '/
, if the distance between 8 and 9.6 is 90 degrees or less,
The distance between the bender 4 fufu mechanism R+ and BS and between Ba and 84 is long, and the distance between B2. Between Ba and B4. 'Since the distance between B1 becomes shorter, the end face shape of the □ spiral hoop that can be manufactured becomes a rectangle. In this case, the crossing angle can be changed by one point by temporarily releasing the fixation of the slide blocks 12 to 15 provided in each of the guide frames 6 to 9 to the ring frame 5 by the setscrews 20 to 23. The correction shafts 28 and 29 of each bending mechanism are 1
Viewed from one side, bisector of the apex angle of the hoop to be bent and formed 1
Although it is necessary to always arrange the correction shaft on a line at right angles to this, when the above-mentioned crossing angle is changed, the required arrangement of the correction shaft becomes incorrect. Therefore, in this case, the clamping base 4 is fixed by the setscrew 47 of the movable head 24, which allows each bending mechanism to be
By temporarily releasing the fixation with the movable head 5 and adjusting the direction of each movable head 24 by rubbing against each guide frame 6 to 9, the deviation can be easily resolved.

The size of the end face of one mataspiral hoop, that is, the size of each side, differs depending on the use of the hoop. Therefore, by changing the distance from the center of rotation of each bending mechanism BI-B4, it is possible to arbitrarily manufacture any spiral hoop having different dimensions as described above. Note that the above distance change in this case applies to each guide frame 6 to 9.
In each case, the fixing screw 47 of the movable head 24 is temporarily loosened a little, and the slide block 1 is
The feed screw 43 is rotated using the adjustment gear group 44 built into each of the screws 2 to 15, and the clamp table 45 to which one screw is screwed is moved along each guide frame, and the above-mentioned stop is attached to the clamp table 45. This can be easily done by also moving the movable head 24 coupled with the screw 47 along the guide frame.

As described above, the present invention provides four bending mechanisms that are equipped with one bending die, one extrusion shaft, and two straightening shafts around the center of rotation of a rotary mechanism that is rotated at a constant speed.
The two straightening shafts operated by the stationary cam behind the rotary mechanism move the bar that is drawn in so as to be wrapped around the bending die of each pendant structure by the rotation of the rotor IJ structure. Pressure is applied so as to follow the bending die, and while the bending is performed at right angles in order for each length, the extrusion shaft is moved away from the bending die by the extrusion shaft, which is also operated by the above-mentioned cam. Therefore, according to the present invention, it is possible to continuously and efficiently manufacture spiral hoops from a long stick, and by displacing the position of each bending mechanism on the rotary mechanism. By changing the spacing between adjacent ones or changing the distance from the center of rotation, any spiral hoop with a square or rectangular end shape can be manufactured, and the dimensions of each side of the end shape can be made large or small. Excellent effects can be expected, such as the ability to manufacture any variety of spiral hoops.

[Brief explanation of the drawing]

FIG. 1 is a sloped view showing an example of a spiral hoop to which the present invention is applied, and FIG. 2 is a front view showing an embodiment of the present invention.
The 3'th tooth is a sectional view taken along line I-II in Figure 2, Figure 4 is an enlarged front view of one bending mechanism, and the 5th
The figure is a cross-sectional view taken along the line III--IV of FIG. 4, FIG. 6 is a cross-sectional view taken along the line nr-v of FIG. 4, and FIG. 7 is a developed view showing the shape of the cam and the operation of the bending mechanism thereby. A...Rotary mechanism, n, -B4...Bending mechanism, 0...Spiral hoop, c'...Bar material, l...Base, 2...Main shaft, 5...Ring frame, 6-9...
・Guide frame, 12-15...Slide block,
24. Movable head, 25. Hoop support rod, 26-.
Bending mold, 27... Extrusion shaft, 28.29... Straightening shaft,
33...Step part (removal means), 34.35...Pressure claw (
Pressing is a means), 48-・Cam, 5o-・Spring Applicant: V Nwa Shoji Co., Ltd. JP-A-58-154429 (7)

Claims (1)

[Claims] (1) A large-diameter rotary mechanism that rotates in front of the base around the main axis on the pace, four bending mechanisms arranged around the center of rotation on the front of the mechanism, and behind the rotary mechanism. and a cam fixed to the base, and the rotary mechanism is constructed of a large diameter ring frame mounted on the main shaft, and a ring frame that spans the frame in the radial direction so that the mutual intersection angle can be changed. It consists of four possible sets of guide frames and a slide block that is attached to the outer end of each guide frame and is usually fixed to the ring frame so that it can be individually slid in the circumferential direction of the ring frame at any time. , and each of the bending mechanisms has a movable head which is usually fixed to the guide frame so that it can move along the guide frame in the radial direction of the ring frame, and a movable head which is usually fixed to the guide frame so that it can move in the radial direction of the ring frame along the above-mentioned guide frame, a bending die, a hoop support rod protruding forward from the die, two straightening shafts disposed near each end of the arcuate die surface of the bending die, and near the middle of the die surface; Furthermore, each of the straightening shafts and the extrusion shaft has a movable head that passes through the movable head parallel to the main shaft so as to be slidable in the axial direction. Under this condition, spring pressure is applied in the direction of retraction from the front surface of the head, and the cam is formed with a cam surface shaped to sequentially push each of the correction shafts and extrusion shafts toward the front surface of the movable head. and means for pushing each straightening shaft toward the front of the head, and for pressing the bar, which has already been wound around the bending die when it is ejected, against the die. The spiral hoop manufacturing apparatus is characterized in that it is provided with means for separating the already bent bar from the bending mold when the shaft is pushed out to the front of the head.