JPH0639220U - vendor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a vendor that can easily and easily perform die replacement work. [Structure] Bending die 10 and clamping die 20
And a rotating frame 17 rotatable around the bending center of the bending die 10, a pressing die 30, and a driving means 31 for driving the rotating frame 10, and the clamping die 20 is a horizontal support table 3. This slide block 2 is connected to the upper slide block 21 so that it can be removed and inserted in the vertical direction.
1 is one end side link 22 of a plurality of chain links 22, 23
The other end side link 33 is pivotally mounted on the horizontal support base 3, the other end side link 23 is provided with an operating lever 27, and the clamping die 20 has the chain links 22 and 23 horizontally supported. When it is parallel to the table 3, it is in the bent material holding position, and when the operating lever 27 is operated to rotate the other end side link 23 upward, it is in the bent material open position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bender for bending a bendable material such as a metal pipe material or a metal rod with a predetermined curvature. The bending die fixed on the machine frame and the bendable material of this bending die. Equipped with a clamping die that is provided at the insertion opening so as to be movable relative to the bending die and clamps and holds the material to be bent between the bending die and a pressing die that rotates around the bending center of the bending die. Regarding vendors.

[0002]

[Prior art and its problems]

 Conventionally, in this type of bender, the bending die, the clamping die and the pressing die are each fastened and fixed by bolts at predetermined positions.When changing the diameter or bending curvature of the material to be bent, the die should be replaced. Since the bolts that secure each die are loosened one by one and pulled out from the bolt holes, the die is replaced, and the bolts are attached and tightened again, which is unusual for die replacement work. It took a lot of trouble and time.

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

[0004]

[Means for Solving the Problems]

 A bender according to claim 1 of the present invention comprises a bending die 10 fixed on a machine frame 1 and a bending die 10 which is provided at a bending material insertion port 18 so that the bending die 10 can be moved near and far. A replaceable clamp die 20 for sandwiching and fixing the material M to be bent with the die 10, a rotating frame 17 rotatably provided around the bending center of the bending die 10, and A pressing die 30 that is detachably provided at a predetermined position on the moving frame 17 and that rotates around the bending die 10 as the rotating frame 17 rotates, and the rotating frame 17 are driven. The bending die 10 is provided with a drive means 31, and the mounting through hole 11 provided at the bending center position thereof is axially insertable into and removable from the mounting shaft 9 provided upright on the machine frame 1. While mating non-rotatably A bolt 15 having a bolt head 15a having a diameter smaller than that of the mounting through hole 11 can be inserted into or removed from the screw hole 14 provided coaxially at the upper end of the mounting shaft 9. It is characterized in that it is fixed by being screwed and fastened through a substantially U-shaped washer 16.

In the bender according to claim 2, the clamping die 20 is substantially supported by a slide block 21 supported on the horizontal support base 3 of the machine frame 1 so as to be slidable in a perspective direction with respect to the bending die 10. A plurality of slide blocks 21 are arranged on the horizontal support base 3 in the same row as the blocks 21 connected to each other through the dovetail-shaped groove portions 21a and the substantially dovetail-shaped tenon portions 20b so as to be vertically removable. It is pivotally connected to one end side link 22 of the chain links 22 and 23, the other end side link 33 is pivotally mounted on the horizontal support base 3, and the other end side link 23 rotates the link 23 upward. An operating lever 27 for projecting is provided so that the clamping die 20 is in the position to hold the material to be bent when the chain links 22 and 23 are substantially parallel to the horizontal support base 3, and the operating lever 27 is operated. Product Then, when the other end side link 23 is rotated upward, it is arranged so as to be at the bending material release position.

In the bender according to claim 3, the pressing die 30 is configured as a unit together with a bracket 32 supporting the die 30, and the bracket 32 includes upper and lower side plates 34 on which the pressing die 30 is axially mounted, 35 and an outer side plate 36 connecting both side plates are formed in a U shape, and a mounting surface 37a for mounting the lower side plate 35, an outer peripheral side support surface 37b for supporting the outer side plate 36, and It is characterized in that it is detachably fitted and supported by the fitting support portion 37 on the rotating frame 17, which has a rear end supporting surface 37c for supporting the rear end surface of the U-shaped bracket 32.

In the bender according to claim 4, one end of the rotating frame 17 is pivotally attached to the mounting shaft 9, and the drive 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, a rack 39 that meshes with the pinion 38, and a hydraulic cylinder 40 that reciprocally drives the rack 39. It is characterized by

[0008]

【Example】

 1 to 7 showing an embodiment of a bender according to the present invention, 1 is a machine frame, which is flush with the horizontal base 2 (see FIGS. 3 and 6) and the horizontal base 2. And a horizontal support base 3 integrally provided, a front leg plate 4 disposed on the front side of the horizontal base 2, a rear leg plate 5 disposed at a rear position facing the front leg plate 4, and both legs. It is composed of a bottom plate 6 connecting the lower ends of the plates 4 and 5, and an end leg plate 7 arranged at the 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 that penetrates the horizontal base 2 from the bottom plate 6 and projects to the center of the upper surface of the horizontal base 2 is vertically fixed to the machine frame 1. A substantially disc-shaped bending die 10 is fitted and fixed to the mounting shaft 9. That is, the bending die 10 has a through hole 11 for mounting which can be fitted to the mounting shaft 9 at the bending center position, and a key 12 protruding from the upper surface of the horizontal base 2 is fitted to the lower surface thereof. The mounting shaft 9 has a threaded hole 14 formed coaxially at its upper end. However, in the bending die 10, the mounting through hole 11 is fitted into the mounting shaft 9, the key 12 is fitted into the key groove 13, and the screw hole of the mounting shaft 9 is fitted. A die fixing bolt 15 having a bolt head 15a smaller than the hole diameter of the mounting through hole 11 is screwed into the shaft 14 through a substantially U-shaped washer 16 which can be inserted into and removed from the shaft of the bolt 15. Then, it 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. The rotating frame 17 will be described later.

The bending die 10 has a guide groove 10 a having a semicircular cross section on the outer peripheral portion, and the bendable material insertion port 18 is formed by a member different from the die body and is fixed by a screw 19. .

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

As shown in FIGS. 1 and 7, the clamping die 20 is mounted on a slide block 21 which is slidably supported on the horizontal support base 3 with respect to the bending die 10 in the perspective direction. The slide block 21 is vertically detachably connected via a substantially dovetail groove 21a and a substantially dovetail tenon 20b on the side of the clamping die 20. The slide block 21 is arranged on the horizontal support base 3 in the same row as the block 21. One end side link 22 of the plurality of arranged chain links 22, 23 is pivotally attached by a pin P1, and the other end side link 23 is slidably supported on the horizontal support base 3 in the same direction as the slide block 21. It is pivotally attached to another slide block 24 formed by a pin P2. As shown in FIGS. 1 and 2, an adjusting bolt 26 screwed through a fixing piece 25 on the horizontal support base 3 is rotatably connected to the sliding block 24. The other end side link 23 is provided with an operation lever 27 for turning 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 b and 29 b, which are guided by guide grooves 28 a and 29 a formed through the horizontal support base 3, are provided on the lower surfaces of the slide blocks 21 and 24, respectively. Stopping pieces 28c, 29c are attached to the lower ends of the guide pieces 28b, 29b by screw members 28d, 29d. The slide block 24 is connected to the adjusting bolt 26 as described above, and is normally fixed in a fixed position.

Therefore, the clamping die 20 is inserted into 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. It comes into contact with each other and comes to a bending material holding position where the bending material M is held and fixed between the two guide grooves 20a and 10a. 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 to the adjusting bolt 26. Further, by rotating the operation lever 27 from the upright position shown in FIG. 2 to the tilted position shown in FIG. 4 and rotating the link 23 upward, the slide block 21 is moved through the link 22. Is slid along the horizontal support base 3, whereby the clamping die 20 is separated from the bending material insertion port 18 to be in the bending material opening position.

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

The pressing die 30 is integrally assembled to a bracket 32 that 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 configuration including upper and lower side plates 34 and 35 on which a pressing die 30 is detachably attached by a bolt 33 and an outer side plate 36 connecting the side plates 34 and 35. It is formed in a frame shape. On the other hand, on the rotating frame 17, as shown in FIG. 3, 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, A fitting support portion 37 having a lower plate 35 and a rear end support surface 37c for supporting the rear end surface of the outer plate 36 is provided, and the bracket 32 is detachably fitted and supported on the fitting support portion 37. Will be done.

The driving means 31 for driving the rotating frame 17 is rotatably fitted to the mounting shaft 9 as shown in FIGS. 3 and 6, and also has a base plate portion of the rotating frame 17. The pinion 38 is integrally connected to the pinion 17a, a rack 39 that meshes with the pinion 38, and a hydraulic cylinder 40 that reciprocally drives the rack 39. One end of the rack 39 is slidably supported in the longitudinal direction at a corner between the rear leg plate 5 and the bottom plate 6 of the machine frame 1 (see FIG. 6), and the other end is linked to a hydraulic cylinder 40. . When the hydraulic cylinder 40 contracts, the rotary 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 expands for a predetermined stroke, for example, Bending up to the virtual illustrated position is the position rotated around the bending center of the die 10.

When bending a bent material M such as a metal pipe using the bender having the above-described structure, first, as shown in FIG. 4, pull the operation lever 27 toward the front side. By rotating the link 23 upward, the slide block 22 is slid along the horizontal support base 3 via the link 22, the clamping die 20 is pulled away from the bending material insertion port 18, and the bending material is bent. Set to the open position. In this state, after the bending material M is inserted through the bending material insertion opening 18 for the required length, the operation lever 27 is returned to its original position, and the chain links 22 and 23 that have been bent upward are horizontally supported. 3, the clamp die 20 abuts the bending die 10 at the bending material insertion port 18 and clamps and fixes a required portion of the bending material M.

When the hydraulic cylinder 40 is extended from the state in which the material to be bent M is clamped and fixed by the clamping die 20 as described above, the rack 39 moves in its length direction to rotate the pinion 38, As a result, the rotating frame 17 is rotated, and the die unit DU on the rotating frame 17 is rotated around the bending die 10. As the die unit DU rotates, the bending material M inserted through the bending material insertion port 18 is pressed against the outer peripheral portion of the bending die 10 by the pressing die 30 as shown by the phantom line in FIG. While being bent, it is bent and formed 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 are applied to the die unit DU on the rotation frame 17. However, since their reaction forces are supported by the outer peripheral side support surface 37b and the rear end support surface 37c of the fitting support portion 37, the die unit DU moves undesirably on the rotating frame 17 during bending. It does not come off or fall off from the rotating frame 17.

After the two-dimensional bending as described above, the clamping die 20 is opened by the operation 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 a required length, and again with the clamping die 20 clamped by the operating lever 27 to fix the material M to be bent, the above-described bending operation is repeated to perform three-dimensional bending. It can be carried out. When continuously performing such two-dimensional and three-dimensional bending processes, since the opening and closing operation of the clamping die 20 can be easily and quickly performed 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 or 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 minimized. It has the advantage of being short.

On the other hand, when changing the diameter of the material to be bent M or changing the bending curvature, 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 bolts 15 screwed to the mounting shaft 9 are appropriately loosened to attach the U-shaped washer 16 to the bolt head 15a and the bending die 10. If it is pulled out from between the upper surface and the upper surface, the originally used bending die 10 can be easily and easily removed by simply lifting up 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. The bending die 10 can be attached simply and easily by only fastening the fastening die 15.

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 can 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.

Further, in order to replace the pressing die 30, the die unit DU fitted and supported by the fitting support portion 37 on the rotary frame 17 is simply lifted upward or pulled forward. Then, the required die unit DU, which can be easily removed and in which a new pressing die 30 is axially mounted, is moved from the state shown in FIG. 3 or the state shown in FIG. It may be inserted in 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 configured in a unit with the bracket 32. However, the pressing die 30 is Alternatively, it may be detachably attached to a predetermined position on the rotating frame 17 alone. Further, the structure for replacing the clamping die 20 may be a structure other than that of the embodiment. Further, the internal grooves 10a, 20a, 30a formed on the outer periphery of each of the bending die 10, the clamping die 20, and the pressing die 30 are not limited to a semicircle, and may have a desired cross-sectional shape such as a square. be able to. Further, the drive means 31 for driving the rotating frame 17 is constituted by the pinion 38, the rack 39 and the hydraulic cylinder 40 in the embodiment. For example, a hydraulic motor for directly rotating the rotating frame 17 is used. It may be a driving means including

[0025]

[Operation and effect of the device]

 In the bender according to claim 1 of the present invention, the pressing die on the rotating frame is rotated by rotating the rotating frame by the driving means from the state in which the material to be bent is clamped and fixed by the clamping die. The material to be bent rotated around the bending die and inserted from the material to be bent insertion port in accordance with this is bent and formed into a predetermined curvature while being pressed against the outer peripheral portion of the bending die by the pressing die. Therefore, when changing the diameter of the material to be bent or changing the bending curvature, especially when replacing the bending die, insert the die fixing bolt screwed on the mounting shaft into the mounting penetrating hole. If you loosen it properly without removing it from the hole and pull out the approximately U-shaped washer from between the bolt head and the upper surface of the bending die, you can easily remove the original bending die just by lifting it up. be able to. Then, for the die to be newly attached, this is 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. Good. Therefore, according to this vendor, it is possible to easily and easily replace the dies, and the work setup is very good.

According to the second aspect, when the lever on the lever side is rotated upward by the operation lever, the slide block slides along the horizontal support base via the chain link including the link for clamping. Move the die away from the bending material insertion port and position it in the bending material open state. When the bending material is inserted into the bending material insertion port in such a state and the operation lever is returned to the original position, the chain link is extended in parallel with the horizontal support and the clamping die is bent. Hold the material to be bent in close proximity to the bending die at the insertion port. In this way, the clamping die can be opened and closed simply by rotating the operating lever, so that the bending material can be fixed and released at the bending material insertion port easily and quickly, resulting in a significant improvement in work efficiency. be able to. This is especially effective when continuously performing two-dimensional and three-dimensional bending.

According to claim 2, when the clamp die is replaced, the clamp die initially used can be easily pulled out from the slide block by simply pulling the die upward. Also, a new clamping die can be attached by simply inserting the dovetail-shaped tenon into the dovetail-shaped groove, which makes installation simple and easy, and the work setup is extremely good.

According to the third aspect, 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 mounted on the shaft, can be inserted into the fitting support section, which makes replacement of the pressing die extremely easy and facilitates work setup. Is extremely good.

Further, according to the fourth aspect, the small hydraulic cylinder can obtain a strong rotating torque for rotating the rotating frame, so that the whole bender can be constructed in a small and lightweight structure, and at the same time, the portable type. It becomes possible to become the vendor of.

[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 Mortar 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 surface 37c Rear end support surface 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 from and to the bending die, and clamps 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 configured as 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.