JPH0744332Y2 - vendor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bender for bending a bent material such as a metal pipe or a metal rod with a predetermined curvature, and a bending die fixed on a machine frame.
A bending die is provided at a bending material insertion port of the bending die so as to be movable in the distance and the clamping die for clamping and fixing the bending material between the bending die and the bending die and is rotated around a bending center of the bending die. The present invention relates to a vendor having a pressing die.

[0002]

2. Description of the Related Art Conventionally, in this type of bender, a bending die, a clamping die and a pressing die are respectively fastened and fixed by bolts at predetermined positions.
When changing the dies when the diameter and bending curvature of the material to be bent are changed, loosen the bolts that secure each die one by one, pull them out from the bolt holes, replace the dies, and then replace the bolts again. Since the dies are attached and fastened, it takes much time and labor to replace the dies.

An object of the present invention is to provide a vendor that can easily replace each die.

[0004]

A bender according to claim 1 of the present invention comprises a bending die 10 fixed on a machine frame 1,
A replaceable clamp die 20 that is provided at a bending material insertion port 18 of the bending die 10 so as to be movable in the perspective direction with respect to the bending die 10 and that clamps and fixes the bending material M between the bending die 10 and the bending die 10. A rotating frame 17 rotatably provided around the bending center of the bending die 10, and a detachable member provided at a predetermined position on the rotating frame 17, and the bending frame 17 is bent in accordance with the rotation. The bending die 10 is provided with a pressing die 30 that rotates around the die 10 and a driving means 31 that drives the rotating frame 17, and the bending die 10 is provided with a through hole 1 for attachment provided at a bending center position thereof.
1 is fitted in a mounting shaft 9 erected on the machine frame 1 so that it can be inserted and removed in the axial direction and cannot rotate, and a screw hole 14 is provided coaxially at the upper end of the mounting shaft 9. , The bolt head 15a has a smaller diameter than the mounting through hole 11
Is fixed by being screwed into and fastened to the shaft portion of the bolt 15 via a substantially U-shaped washer 16 that can be inserted and removed.

In the bender according to the second aspect, the clamping die 20 is substantially attached to a slide block 21 which is slidably supported on the horizontal support base 3 of the machine frame 1 with respect to the bending die 10 in the perspective direction. A plurality of chain links in which the slide blocks 21 are connected to each other through the dovetail-shaped groove portions 21a and the substantially dovetail-shaped tenon portions 20b so that they can be inserted and removed in the vertical direction, and the slide blocks 21 are arranged on the horizontal support base 3 in the same row as the blocks 21 Two
2, 23 are pivotally connected to one end side link 22, and the other end side link 33 is pivotally attached on the horizontal support base 3.
3 is provided with an operating lever 27 for rotating the link 23 upward, and the clamping die 20 is covered when the chain links 22 and 23 are substantially parallel to the horizontal support base 3. The bending material holding position is set, and when the other end side link 23 is turned upward by operating the operation lever 27, the bending material opening position is set.

In the bender according to claim 3, the pressing die 30 supports the bracket 3 which supports the die 30.
2, and the bracket 32,
Upper and lower side plates 34, 3 for pivotally mounting the pressing die 30
5 and an outer side plate 36 connecting the both side plates are formed in a U shape, and a placing surface 37a on which the lower side plate 35 is placed, an outer peripheral side supporting surface 37b that supports the outer side plate 36, and the U shape. Rear end support surface 37c that supports the rear end surface of the bracket 32
The fitting support portion 37 on the rotating frame 17 having
It is characterized in that it is detachably fitted to and supported by.

In the bender according to claim 4, one end of the rotating frame 17 is pivotally attached to the mounting shaft 9, and the driving means 31 for driving the rotating frame 17 is coaxial with the mounting shaft 9. A pinion 38 that is rotatably attached to the pivot frame 17 and is integrally connected to the pivot end of the rotating frame 17.
And a rack 39 that meshes with the pinion 38, and a hydraulic cylinder 40 that reciprocally drives the rack 39.

[0008]

FIG. 1 shows an embodiment of a vendor according to the present invention.
In FIG. 7, reference numeral 1 denotes a machine frame, a horizontal base 2 (see FIG. 3 and FIG. 6), a horizontal support base 3 which is integrally connected to the horizontal base 2 so as to be flush with the horizontal base 2, and the horizontal base. A front leg plate 4 arranged on the front side of the base 2, a rear leg plate 5 arranged at a rear position facing the front leg plate 4, and a bottom plate 6 connecting the lower end portions of both leg plates 4, 5 to each other. It is composed of an end leg plate 7 arranged at an end of the horizontal support base 3. Reference numeral 8 is a tie bolt that connects the rear leg plate 5 and the end leg plate 7.

As shown in FIG. 6, a mounting shaft 9 penetrating the horizontal base 2 from the bottom plate 6 and projecting to the center of the upper surface of the horizontal base 2 is vertically fixed to the machine frame 1, A substantially disk-shaped bending die 10 is fitted and fixed to the mounting shaft 9. That is, the bending die 10 has a mounting through hole 11 which can be fitted to the mounting shaft 9 at the bending center position, and can be fitted to the key 12 projecting on the upper surface of the horizontal base 2 on the lower surface. The mounting shaft 9 has a screw hole 14 coaxially formed at the upper end thereof. Then,
In the bending die 10, the mounting through hole 11 is fitted to the mounting shaft 9, the key 12 is fitted to the key groove 13, and the screw hole 14 of the mounting shaft 9 is
A die fixing bolt 15 having a bolt head 15a whose diameter is smaller than the hole diameter of the mounting through hole 11 is screwed and fastened through a substantially U-shaped washer 16 that can be inserted into and removed from the shaft portion of the bolt 15. Is fixed in a fixed position on the horizontal base 2. A rotating frame 17 that rotates around the bending center of the bending die 10 is rotatably attached to the mounting shaft 9, and the rotating frame 17 will be described later.

The bending die 10 has a guide groove 10a having a semicircular cross section at the outer peripheral portion, and the bending material insertion port 18 thereof is
It is formed of a member separate from the die body and is fixed with screws 19.

On the horizontal support base 3 of the machine frame 1, a replaceable clamping die 20 for clamping and fixing the bending material M between the bending die 10 and the bending die 10 at the bending material insertion port 18 of the bending die 10. However, the bending die 10 is provided so as to be movable in a perspective manner. The clamping die 20 has a guide groove 2 corresponding to the guide groove 10a of the bending die 10.
Has 0a.

As shown in FIGS. 1 and 7, the clamping die 20 is a slide block 21 supported on the horizontal support base 3 so as to be slidable in the perspective direction with respect to the bending die 10.
Is vertically detachably connected via a substantially dovetail-shaped groove portion 21a on the slide block 21 side and a generally dovetail-shaped tenon portion 20b on the clamping die 20 side. One end side link 22 of the plurality of chain links 22 and 23 arranged on the same row as the block 21 is pivotally attached by a pin P1, and the other end side link 23 is
It is pivotally attached by a pin P2 to another slide block 24 slidably supported on the horizontal support base 3 in the same direction as the slide block 21. This slide block 24
As shown in FIGS. 1 and 2, an adjustment bolt 26 screwed through a fixed piece 25 on the horizontal support base 3 is rotatably connected to this. The other end side link 23 is provided with an operation lever 27 for rotating the link 23 upward. The chain links 22 and 23 are pivotally connected by a pin P3, and the pin P3 is normally located slightly lower than the pins P1 and P2 on both ends as shown in FIG.

Guide pieces 28 are formed on the lower surfaces of the slide blocks 21 and 24, and are guided by guide grooves 28a and 29a formed through the horizontal support base 3, respectively.
b and 29b are projected, and each guide piece 28
Fall-out preventing pieces 28c, 29c are attached to the lower ends of b, 29b by screw members 28d, 29d. The slide block 24 is connected to the adjusting bolt 26 as described above, and is normally fixed at a fixed position.

Therefore, the clamping die 20 contacts the bending material insertion port 18 of the bending die 10 when the chain links 22 and 23 are substantially parallel to the horizontal support base 3 as shown in FIG. The guide grooves 20a and 10a of both sides are in contact with each other.
It becomes a bending material clamping position for clamping and fixing the bending material M between. In this case, the contact position between the clamping die 20 and the bending die 10 can be adjusted by rotating the adjusting bolt 26 and appropriately sliding the slide block 24 connected thereto. Further, the operation lever 27 is pivotally operated from the upright posture of FIG. 2 to the tilted posture of FIG. 4, and the link 23 is pivoted upward to horizontally support the slide block 21 via the link 22. By sliding along the table 3, the clamping die 20 is separated from the bending material insertion opening 18,
The bending material is at the open position.

As is apparent from FIGS. 3 and 6, the rotating frame 17 has a disk-shaped base plate portion 17a at one end thereof, and the base plate portion 17a is rotatably pivoted on the mounting shaft 9. The bending die 10 is worn and is rotated around the bending center of the bending die 10 by the driving means 31. And this rotating frame 1
A pressing die 30 that rotates around the bending die 10 in accordance with the rotation of the frame 17 is detachably provided on the tip end side of the frame 7. The pressing die 30 has the bending die 10 and the clamping die 2 on the outer peripheral portion thereof.
Guide groove 30 having the same cross-sectional shape as the guide grooves 10a and 20a of 0
a.

The pressing die 30 is integrally assembled with a bracket 32 which supports the die 30, and together with the bracket 32 constitutes a die unit DU. As shown in FIG. 5, the bracket 32 has a U-shaped frame composed of upper and lower side plates 34 and 35 on which a pressing die 30 is detachably attached by bolts 33 and an outer side plate 36 connecting the side plates 34 and 35. Is formed in. On the other hand, on the rotating frame 17, as shown in FIG.
A mounting surface 37a on which the lower plate 35 of the bracket 32 is fitted and mounted, and an outer peripheral side support surface 37b that supports the outer plate 36.
And a fitting support portion 37 having a lower plate 35 and a rear end supporting surface 37c for supporting the rear end surface of the outer plate 36, and the bracket 32 is detachably fitted to the fitting support portion 37. Will be supported.

The driving means 31 for driving the rotating frame 17 is rotatably fitted to the mounting shaft 9 as shown in FIGS.
A pinion 38 integrally connected to the base plate portion 17a of
A rack 39 that meshes with the pinion 38 and a hydraulic cylinder 40 that reciprocally drives the rack 39 are included. One end side of the rack 39 has the rear leg plate 5 and the bottom plate 6 of the machine frame 1.
Are supported slidably in the lengthwise direction at the corners of (see FIG. 6), and the other end is interlocked with the hydraulic cylinder 40. When the hydraulic cylinder 40 contracts, the rotating frame 17 is located close to the bending material insertion port 18 as shown by the solid line in FIG. 3, and when the hydraulic cylinder 40 is extended by a predetermined stroke, for example, the same figure is used. Is a position rotated around the bending center of the bending die 10 to the virtual illustrated position.

When a bending material M such as a metal pipe is bent by using the bender having the above-mentioned structure,
First, as shown in FIG. 4, by pulling the operation lever 27 toward the front side and rotating the link 23 upward, the slide block 22 is slid along the horizontal support base 3 via the link 22 for clamping. The die 20 is pulled away from the bending material insertion port 18 to be the bending material opening position. In such a state, after the bending material M is inserted through the bending material insertion opening 18 for a required length, the operation lever 27 is returned to the original position, and the chain links 22 and 23 bent upward are horizontally supported. Clamping die 2 that extends in parallel with 3
0 contacts the bending die 10 at the bending material insertion port 18, and clamps and fixes a required portion of the bending material M.

From the state in which the material M to be bent is clamped and fixed by the clamping die 20 as described above, the hydraulic cylinder 40
When the rack is extended, the rack 39 moves in the lengthwise direction to rotate the pinion 38, whereby the rotating frame 17 rotates, and the die unit DU on the rotating frame 17 moves the bending unit 10 of the bending die 10. Rotate around. As the die unit DU rotates, the bending material M inserted from the bending material insertion port 18 is, as shown in phantom lines in FIG.
The pressing die 30 presses the outer peripheral portion of the bending die 10 and bends it into a predetermined curvature. When the rotating frame 17 rotates in the bending action direction, a reaction force in the direction opposite to the bending action rotation direction and a reaction force in the centrifugal direction act on the die unit DU on the rotation frame 17. , Their reaction force is the fitting support portion 37.
Since it is supported by the outer peripheral side support surface 37b and the rear end support surface 37c, the die unit DU moves undesirably on the rotating frame 17 during bending and the rotating frame 1
7 It does not fall off the top.

After the two-dimensional bending process as described above, the clamping die 20 is opened by the operating lever 27, and the bending material M is rotated about its axis, for example, 90 degrees, and the bending material insertion port 18 is opened. From the front to the front by the required length, and again the clamping die 20 is moved to the operating lever 27.
With the clamped material to fix the bending material M,
By repeating the above bending operation, three-dimensional bending can be performed. When continuously performing such two-dimensional and three-dimensional bending processes, since the opening and closing operation of the clamping die 20 can be performed easily and quickly by the operation lever 27, the bending work is very easy and the work efficiency is remarkably improved. Can be achieved. Further, in such a secondary and three-dimensional bending process, since the pressing die 30 is a so-called roller type and rotates around the bending die 10, the length between the bending points is shortened as much as possible. There is an advantage that it can be taken.

On the other hand, when the diameter of the material to be bent M is changed or the bending curvature is changed, it is necessary to replace the bending die 10, the clamping die 20 and the pressing die 30, respectively. In such a case, first, In order to replace the bending die 10, as shown in FIG. 6, the die fixing bolt 15 screwed to the mounting shaft 9 is appropriately loosened, and the U-shaped washer 16 is attached to the bolt head 15a and the upper surface of the bending die 10. If the bending die 10 is initially used, it can be easily and easily removed by simply lifting the die 10 with the bolt 15 still attached. Then, the required bending die 10 is fitted to the mounting shaft 9, and the U-shaped washer 16 is inserted between the bolt head 15a of the die fixing bolt 15 and the upper surface of the bending die 10 to form the die fixing bolt 15 The bending die 10 can be easily and easily attached by simply fastening.

Next, in order to replace the clamping die 20, as shown in FIG. 7, the initially used clamping die 20 can be easily pulled out from the slide block 21 by simply pulling the die 20 upward. You can Further, a new clamping die 20 may be attached only by inserting the substantially dovetail-shaped tenon portion 20b on the side of the clamping die 20 into the substantially dovetail-shaped groove portion 21a on the side of the slide block 21.

In order to replace the pressing die 30, the die unit DU fitted and supported by the fitting support portion 37 on the rotating frame 17 is simply lifted upward or pulled forward. The required die unit DU, which can be easily removed and on which the new pressing die 30 is attached, is rotated from the state shown in FIG. 3 or the state shown in FIG.
It may be inserted into the upper fitting support portion 37.

In the embodiment described above, the pressing die 30 is detachably provided on the rotating frame 17 as a die unit DU having the bracket 32 as a unit, and the pressing die 30 is used alone. It may be detachably attached to a predetermined position on the rotating frame 17. Further, the structure for replacing the clamping die 20 may be a structure other than that of the embodiment. In addition, the guide groove 1 formed on the outer periphery of each of the bending die 10, the clamping die 20, and the pressing die 30.
0a, 20a, and 30a are not limited to a semicircle, and can have a desired cross-sectional shape such as a square. Further, the drive means 31 for driving the rotating frame 17 is composed of the pinion 38, the rack 39 and the hydraulic cylinder 40 in the embodiment, but for example, a hydraulic motor for directly rotating the rotating frame 17 or the like. The driving means may be composed of

[0025]

In the bender according to claim 1 of the present invention, the rotating frame is rotated by the driving means from the state in which the material to be bent is clamped and fixed by the clamping die. The pressing die rotates around the bending die, and the bending material inserted from the bending material insertion opening is bent to a predetermined curvature while being pressed against the outer periphery of the bending die by the pressing die. Molded. Then, when changing the diameter of the material to be bent or changing the bending curvature, in particular, when replacing the bending die, remove the die fixing bolt screwed to the mounting shaft from the mounting through hole. Without any loosening, the substantially U-shaped washer is pulled out from between the bolt head and the upper surface of the bending die, and the bending die originally used can be easily and easily removed by simply lifting it. Then, the die to be newly attached only needs to be fitted to the attachment shaft, the U-shaped washer is inserted between the bolt head of the die fixing bolt and the upper surface of the bending die, and the die fixing bolt is fastened. . Therefore, according to this vendor, the dice can be replaced easily and easily, and the work setup can be greatly improved.

According to the second aspect, by the operation lever,
When the link on the lever side is rotated upward, the clamp die is separated from the bending material insertion port while the slide block slides along the horizontal support via the chain link including this link, and the bending material is bent. Position it open. In such a state, when the bending material is inserted into the bending material insertion port and the operation lever is returned to the original position, the chain link is extended in parallel with the horizontal support base, and the clamping die is bent. The material to be bent is clamped and fixed near the bending die at the insertion port. In this way, since the clamping die can be opened and closed simply by rotating the operation lever, the bending material can be fixed and released at the bending material insertion port easily and quickly,
The work efficiency can be remarkably improved. This is 2
It is particularly effective when continuously performing three-dimensional and three-dimensional bending.

According to the second aspect of the present invention, when the clamping die is replaced, the initially used clamping die can be easily removed from the slide block by simply pulling the die up as it is. The clamp die can be attached simply by inserting the dovetail-shaped tenon into the dovetail-shaped groove, so that the die can be easily and easily installed and the work setup is extremely good.

According to the third aspect of the present invention, in order to replace the pressing die, the die unit fitted and supported by the fitting support portion on the rotating frame is simply lifted upward or pulled forward. The required die unit, which can be easily removed and has a new pressing die attached to it, can be inserted into the fitting support section, making it extremely easy to replace the pressing die, and to set up the work. Is extremely good.

Further, according to the fourth aspect, the small hydraulic cylinder can obtain a strong rotational torque for rotating the rotary frame. Therefore, the whole bender can be constructed in a small and lightweight structure, and the portable type bender can be used. It becomes possible to

[Brief description of drawings]

FIG. 1 is a plan view of a bender showing an embodiment of the present invention.

FIG. 2 is a front view of the above, showing a state in which the clamping die is closed.

FIG. 3 is a partially cutaway plan view of a bender with a bending die removed.

FIG. 4 is a front view of the bender with the clamping die in an open state.

FIG. 5 is an explanatory diagram showing a mounting procedure of a die unit.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is an explanatory diagram showing a procedure for removing the clamping die.

[Explanation of symbols]

 1 Machine frame 2 Horizontal base 3 Horizontal support 9 Mounting shaft 10 Bending die 10a Guide groove 11 Mounting through hole 12 Key 13 Key groove 14 Screw hole 15 Die fixing bolt 15a Bolt head 16 U-shaped washer 17 Rotating frame 18 Bent Material Insertion Port 20 Clamping Die 20a Guide Groove 20b Dovetail Mortise 21 Slide Block 21a Dovetail Groove 22 Chain Link 23 Chain Link 26 Adjusting Bolt 27 Control Lever 30 Push Die 30a Guide Groove 31 Drive Means 32 Bracket DU Dice unit 34 Upper plate 35 Lower plate 36 Outer plate 37 Fitting support 37a Mounting surface 37b Outer peripheral support 37c Rear end support 38 Pinion 39 Rack 40 Hydraulic cylinder M Bending material

Claims (4)

[Scope of utility model registration request] 1. A bending die fixed on a machine frame and a bending die insertion port of the bending die, which is provided so as to be movable in the distance and relative to the bending die, and clamps and holds the bending die between the bending die and the bending die. A replaceable clamping die, a rotating frame rotatably provided around the bending center of the bending die, and a detachable unit provided at a predetermined position on the rotating frame to rotate the rotating frame. And a driving means for driving the rotating frame, wherein the bending die has an attachment through hole provided at the bending center position, The mounting shaft is set upright on the machine frame so that it can be inserted and removed in the axial direction and cannot rotate, and the bolt head penetrates through the mounting hole coaxially at the upper end of the mounting shaft. A bolt with a diameter smaller than the hole, Vendors made fixed by screwing fastening via a substantially U-shaped washer capable insertion to the axis of the bolt. 2. The clamping die comprises a slide block supported on a horizontal support base of the machine frame so as to be slidable in a perspective direction with respect to the bending die, and a substantially dovetail groove portion and a substantially dovetail tenon portion. The slide block is pivotally connected to one end side link of a plurality of chain links arranged in the same row as the block on the horizontal support base, and the other end side link is horizontal. An operation lever for pivoting the link is pivotally mounted on the other end side link on the other end side of the support base, and the clamping die has the chain link substantially parallel to the horizontal support base. The bender according to claim 1, wherein the bending material is held at a parallel position, and the bending material is opened when the other end side link is turned upward by operating the operation lever. 3. The pressing die is formed into a unit together with a bracket that supports the die, and the bracket is formed in a U shape by upper and lower side plates that pivotally mount the pressing die and outer plates that connect both side plates. And a rotating frame having a mounting surface for mounting the lower plate, an outer peripheral side supporting surface for supporting the outer plate, and a rear end supporting surface for supporting a rear end surface of the U-shaped bracket. The bender according to claim 1, which is detachably fitted and supported by the upper fitting support portion. 4. One end of the rotating frame is pivotally attached to the mounting shaft, and drive means for driving the rotating frame is rotatably mounted coaxially with the mounting shaft and is rotatable. 2. The bender according to claim 1, comprising a pinion integrally connected to the pivot end of the frame, a rack that meshes with the pinion, and a hydraulic cylinder that reciprocally drives the rack.