JP4427208B2 - Twister device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a twister device, and more particularly to a twister device capable of performing die set changing work of a die set easily and quickly. The present invention can be applied to, for example, twist molding of a crankshaft.
[0002]
[Prior art]
As a conventional general twister device, for example, a twister body, a torsion bar arranged in parallel to the twist axis of the twister body, a cylinder mechanism for swinging the torsion bar around the torsion axis, and the torsion bar And a die set including a die retainer integrally connected to the bar, and a plurality of die retainers arranged in the axial direction of the molding are rotated in the opposite directions to twist the molding. What to give is known.
[0003]
However, in the conventional twister device, since the torsion bar is supported on the twister body side, the torsion bar interferes with the die set mold changing work. Therefore, the fixing screws must be removed from the twister body to remove the torsion bar, and the changeover work must be performed in that state, and then the torsion bar must be fixed to the twister body again with the fixing screws. Was cumbersome and time consuming.
[0004]
Therefore, as a conventional twister device that overcomes the above problem, for example, a bolster (moving bolster 19) that constitutes a die set can be moved between a storage set position and a change-over position with respect to the twister body, and on this bolster In addition, there is known one in which a torsion bar and a cylinder mechanism are integrally mounted (Japanese Patent Laid-Open No. 57-160537). According to this apparatus, during the changeover operation, the changeover operation can be performed easily and quickly without removing the torsion bar from the twister body by moving the bolster to the changeover position.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional twister device, since the cylinder mechanism is integrally mounted on the bolster, the bolster itself and thus the twister device is complicated and expensive. Further, the bolster is increased in size, and the space for the bolster at the changeover position is required to be relatively wide, and the space efficiency around the twister device is poor. Further, when the bolster is moved, it is necessary to attach and detach the coupler of the drive cylinder that constitutes the cylinder mechanism, which is complicated and takes time.
Further, in the conventional twister device, since the drive cylinder is installed in a substantially horizontal direction, the bolster is further increased in size, and the space for the bolster at the changeover position is required to be larger, and the twister device itself is also increased in size. There was a problem such as.
[0006]
As described above, the present invention solves the above-described problems, and can easily and quickly perform die set changing work, improve the space efficiency of the twister device, and can be easily and inexpensively used. The purpose is to provide.
[0007]
[Means for Solving the Problems]
The twister device according to claim 1, a twister body, a torsion bar arranged in parallel to a twist axis of the twister body, a die retainer integrally connected to the torsion bar, and the twist bar around the torsion axis. In the twister device, the cylinder mechanism is installed on the twister body side. The twister device includes a cylinder mechanism for swinging the cylinder and a bolster movable between a storage set position and a changeover position with respect to the twister body. And a drive cylinder and a connector that can be rotated around the torsion axis by the drive cylinder. The connector and the torsion bar are moved by a die set including the bolster and the die retainer. It can be connected and disconnected from each other.
[0008]
A twister device according to a second aspect is the device according to the first aspect, wherein the drive cylinder is supported by the twister body in a substantially vertical state.
[0009]
A twister device according to a third aspect is the device according to the first or second aspect, wherein the cylinder mechanism includes a swinging arm that is pivotally supported by the twister body about a torsional axis, and the coupling tool is a twisting device. The shaft body extends parallel to the shaft center, and the end of the swing arm and the tip of the piston rod of the drive cylinder are rotatably supported by the shaft.
[0010]
In addition, it is preferable that the “twister device” includes a connection holding unit that holds the connection state between the connection tool and the torsion bar. This is because the connection between the connector and the torsion bar can be made more reliable. In addition, as the connection holding means, for example, a holding cylinder provided in one member of the connection tool and the torsion bar, and a holding cylinder provided in the other member, the tip of the piston rod of the holding cylinder can be inserted. It can comprise and comprise a hole. In addition, as a form of the “torsion bar”, for example, a pair of the torsion bars are arranged side by side with a torsion axis interposed therebetween, and the bolster is horizontally movable in a direction in which the pair of torsion bars are arranged, The pair of torsion bars have different longitudinal lengths, and the length of the short torsion bar is set to a value smaller than the distance between the pair of coupling tools corresponding to the long torsion bar. Can be configured.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings.
1. Configuration of Twister Device As shown in FIGS. 1 and 2, the twister device 1 used in this embodiment has a twister body 2, a die set 3, torsion bars 4 and 5, and the torsion bars 4 and 5 are rotated. A cylinder mechanism 7 is provided. In the following description, the paired members are arranged in the front-rear direction when arranged in parallel with the torsion axis, and arranged in the left-right direction when arranged orthogonal to the torsion axis C. It shall be.
[0012]
As shown in FIGS. 1 and 2, the twister body 2 is installed between a pair of left and right support frames 10a and 10b formed by assembling a square pipe material and a flat plate material, and the pair of support frames 10a and 10b. It consists of a lower base 11 and an intermediate base 12. In addition, the twister body 2 has a rotating shaft 13 for rotatably supporting a swing arm, which will be described later, on opposing surfaces of the pair of support frames 10a and 10b. The axis of the rotary shaft 13 becomes the twist axis C.
[0013]
As shown in FIG. 3, the die set 3 includes upper and lower die retainers 18 and 19 that are arranged in a plurality of groups (three sets) along the upper and lower bolsters 14 and 15, the upper and lower guides 16 and 17, and the torsion axis C. Consists of. The upper and lower bolsters 14 and 15 are detachably attached to the twister body 2 side by a clamp mechanism (not shown). The upper and lower guides 16 and 17 are fixed to the upper and lower bolsters 14 and 15 and have a plurality of guide rollers 21 that support the upper and lower die retainers 18 and 19 so as to be rotatable about the torsion axis C. The upper and lower die retainers 18 and 19 hold upper and lower molds 22, respectively. The upper die retainer 18 can be moved up and down by an appropriate support mechanism and drive mechanism (not shown) so that the upper die retainer 19 can approach and separate from the lower die retainer 19.
[0014]
Further, the lower bolster 15 is supported so as to be movable in the left-right direction on the paper surface of FIG. 3 along a slide rail 24 formed on the twister body 2 side, and is appropriately connected to a drive mechanism (not shown). Yes. Therefore, the lower bolster 15, that is, the die set 3 is moved in the transfer direction between the storage set position A with respect to the twister body 2 and the changeover position B in front of the twister body 2 by the operation of this drive mechanism, as shown in FIG. It can move along S (see FIG. 1). In addition, the said change position B is not limited to the position shown in figure, What is necessary is just an appropriate position which can implement the die change work of the die set 3 simply.
[0015]
As shown in FIGS. 1 and 2, the cylinder mechanism 7 includes a plurality (four) of drive cylinders 30, a plurality (four) of swing arms 31, and a plurality of (four) of coupling tools 32. Become. Each of the drive cylinders 30 is pivotally supported by the lower base 11 of the twister body 2 at the lower end of the cylinder body 30a. In this supported state, the cylinder body 30a is in a substantially vertical state. One end of the swing arm 31 is supported by the rotary shaft 13 of the twister body 2 and is swingable about the torsion axis C. The coupling tool 32 includes a shaft body 32a extending along the torsional axis C and a block body 32b connected to the shaft body 32a (see FIG. 4). The other end of the swing arm 31 and the tip of the piston rod 30b of the drive cylinder 30 are rotatably supported on the shaft body 32a of the connector 32. Accordingly, each coupling tool 32 can swing around the torsion axis C between the standby position P and the molding position Q by the operation of the drive cylinder 30. Moreover, the engagement recessed part 33 is formed in the block body 32b of each connection tool 32 corresponding to the torsion bar mentioned later. The connecting tool 32 corresponding to the front twist bar 4 and the connecting tool 32 corresponding to the rear twist bar 5 have substantially the same configuration, but the lengths of the block bodies 32b in the twist axis C direction are different from each other. Is set.
[0016]
As shown in FIG. 1, the torsion bars 4 and 5 are arranged in parallel with the torsion axis C and in a pair of front and rear with the torsion axis C interposed therebetween. These front and rear torsion bars 4 and 5 are connected to a pair of left and right connecting tools 32 of the above connecting tools 32, respectively. Each torsion bar 4 or 5 has a substantially square cross section (or rectangular cross section) (see FIG. 3). Further, the front twist bar 4 has a length L1 in the longitudinal direction shorter than that of the rear twist bar 5 and is slightly smaller than the distance L2 between the pair of left and right connectors 32 corresponding to the rear twist bar 5. Is set to The middle lower die retainer 19 among the three sets is connected to the front twist bar 4 via a connecting arm 35. The rear torsion bar 5 is connected to the lower die retainer 19 on both the left and right sides of the three sets via a connecting arm 35. In addition, on both end sides of each torsion bar 4, 5, an engaging convex portion 37 corresponding to the engaging concave portion 33 of the connector 32 is formed (see FIG. 4). And the engagement convex part 37 of this torsion bar 4 and 5 and the engagement concave part 33 of the coupling tool 32 can be mutually engaged / disengaged by the movement to the transfer direction S of the said die set 3, and, thereby, a pair of right and left The connector 32 and the front and rear torsion bars 4 and 5 can be connected and released.
[0017]
2. Operation of the Twister Device First, as shown in FIG. 1, the die set 3 is located at the storage set position A as a state before the start of torsion molding, and the front and rear torsion bars 4, 5 are disposed between the pair of left and right connectors 32. Are connected to each other. Further, the piston rod 30b of the drive cylinder 30 is in a contracted state, and the respective connecting tools 32 and the front and rear torsion bars 4 and 5 are located at the standby position P (see FIG. 2). Further, it is assumed that the upper die retainer 18 is located away from the lower die retainer 19. From this state, the workpiece W is positioned and set on the lower die 22 of the lower die retainer 19, and then the upper die retainer 18 is lowered to hold the workpiece W by the upper and lower dies 22 (see FIG. 3). Next, when the piston rod 30 b is extended by the operation of the drive cylinder 30, the pair of left and right coupling tools 32 and the front and rear torsion bars 4 and 5 swing around the torsion axis C. Then, among the lower die retainers 19 connected to the front and rear torsion bars 4 and 5, those adjacent to each other are rotated in the reverse direction about the torsion axis C, and the molding W is subjected to torsion molding. Thereafter, the upper die retainer 18 is raised, and the workpiece W is taken out.
[0018]
Next, when the die set of the die set 3 is changed, the upper die retainer 18 is lowered from the state before the start of the above-described torsion molding, and the opposing surfaces of the upper and lower die retainers 18 and 19 are aligned. Thereafter, when the clamp of the upper bolster 14 with respect to the twister body 2 is released, the upper bolster 14, the upper and lower guides 16 and 17, and the upper and lower die retainers 18 and 19 are mounted on the lower bolster 15. Next, the clamp of the lower bolster 15 with respect to the twister body 2 is released, the lower bolster 15 is moved horizontally along the transfer direction S by the drive mechanism, and the die set 3 is pulled out from the storage set position A to the change position B. The mold 22 is exchanged at the change position B. When returning the die set 3 to the storage set position A, a procedure reverse to the above operation is performed.
[0019]
3. Advantages of Embodiment In such a twister device 1, since the die set 3 can be moved between the storage set position A and the changeover position B with respect to the twister body 2, it is fixed to the twister body side as in the prior art. Compared with a structure in which a torsion bar is detachably attached via a screw or the like, the die set changing work of the die set can be performed easily and rapidly. Further, since the engaging projection 37 of the torsion bars 4 and 5 and the engaging recess 33 of the coupling tool 32 can be engaged and disengaged by the horizontal movement of the die set 3, the torsion bars 4 and 5 on the die set 3 side and the twister Connection / release operation with the drive cylinder 30 on the main body 2 side can be performed easily and quickly. Further, the longitudinal length L1 of the short front twist bar 4 among the front and rear twist bars 4 and 5 is set to a value slightly smaller than the distance L2 between the left and right connectors 32 corresponding to the long rear twist bar 5. Therefore, it is possible to smoothly connect and release the torsion bar and the connecting tool only by simple horizontal movement of the die set.
[0020]
Further, since the cylinder mechanism 7 is installed on the twister body 2 side, the lower bolster 15 and thus the twister device 1 can be configured as simple and inexpensive as compared with the conventional one in which the cylinder mechanism is installed on the lower bolster. . Further, the space of the lower bolster 15 at the changeover position B can be minimized. Further, it is not necessary to remove the coupler of the drive cylinder at the time of changing, and the changing work can be performed more easily and quickly. Further, since the drive cylinder 30 of the cylinder mechanism 7 is supported on the twister body 2 so as to be in a substantially vertical state, the bolster space at the changeover position is further increased as compared with the conventional case where the drive cylinder is supported in a substantially horizontal state. The efficiency can be improved, and the entire twister device can be configured as a compact one.
[0021]
In the present invention, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, as shown in FIG. 4, the holding cylinder 40 is fixed to the connector 32, and the holding holes 41 are formed at the ends of the torsion bars 4 and 5 corresponding to the holding cylinder 40, and the connector 32 is twisted. In the engaged state with the bars 4, 5, the extended end of the piston rod 40 a is inserted into the holding hole 41 by the operation of the holding cylinder 40, and the engaged state between the connector 32 and the torsion bars 4, 5 is maintained. You may make it do. According to such a configuration, the connection between the connector and the torsion bar can be held more reliably. Further, in this embodiment, the engaging recess 33 is provided in the connector 32 and the engaging protrusion 37 is provided in the torsion bars 4 and 5, but the present invention is not limited to this. One of the bars may be provided with an engaging concave portion, and the other member may be provided with an engaging convex portion that engages and disengages with the engagement of the die set.
[0022]
【The invention's effect】
According to the first aspect of the present invention, it is possible to easily and quickly perform the die set changeover operation of the die set, improve the peripheral space efficiency of the twister device, and make the twister device simple and inexpensive.
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the peripheral space efficiency of the twister device can be further improved.
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the connection tool can be reliably supported.
[Brief description of the drawings]
FIG. 1 is a plan view of a twister device according to an embodiment of the present invention.
2 is a longitudinal sectional view taken along line II-II in FIG.
3 is a longitudinal sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view of main parts of a connector and a torsion bar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; Twister apparatus, 2; Twister main body, 3; Die set, 4; Front twist bar, 5: Rear twist bar, 7; Cylinder mechanism, 18: Upper die retainer, 19; Lower die retainer, 30; Drive cylinder, 32; 40, holding cylinder, 41; holding hole.

Claims (3)

A twister body, a torsion bar arranged parallel to the torsion axis of the twister body, a die retainer integrally connected to the torsion bar, and a cylinder mechanism for swinging the torsion bar about the torsion axis A twister device comprising a bolster that is movable between a storage set position and a changeover position with respect to the twister body,
The cylinder mechanism is provided on the twister body side, and includes a drive cylinder and a connection tool that can be rotated around a torsion axis by the drive cylinder. The connection tool and the torsion bar are: A twister device that can be connected to and disconnected from each other by movement of a die set including the bolster and the die retainer. The twisting device according to claim 1, wherein the driving cylinder is supported by the twisting body in a substantially vertical state. The cylinder mechanism includes a swing arm that is pivotally supported by the twister main body about a torsion axis, and the coupling member includes a shaft body extending in parallel with the torsion axis, and an end portion of the swing arm. The twister device according to claim 1 or 2, wherein a tip end portion of a piston rod of the drive cylinder is rotatably supported by the shaft body.

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