JPH0239618Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a sheath intermittent drawing suitable for use in intermittently drawing a metal sheath attached to the outer periphery of a steel bar used in prestressed concrete, for example. This invention relates to a molding device.

(Prior Art) When the above-mentioned steel rod is housed in a sheath, it ends up being biased towards the bottom of the sheath. In order to solve this problem, as shown in FIGS. 9 and 10, the sheath 1 is provided with a horizontal constriction section 1A and a vertical constriction section 1B intermittently and alternately.
Holding the steel rod 2 at the center of the sheath 1 has been considered.

In this case, conventionally, the sheath 1 was constricted by using a manual aperture tool such as a vise to sequentially form the horizontal constriction section 1A and the vertical constriction section 1B while the sheath 1 was fed and rotated.

(Problem to be solved by the invention) However, in the method using a manual drawing tool, the pitch of each drawing part 1A, 1B becomes inaccurate, and the horizontal drawing part 1A and the vertical drawing part 1
There was a problem that the angle of B became inaccurate and the steel rod placed inside could not be centered correctly.

An object of the present invention is to provide a sheath intermittent drawing device that can easily draw the sheath while giving the correct pitch and alternating angle of the drawing portions.

(Means for Solving the Problems) The sheath intermittent drawing device of the present invention for achieving the above object includes a feed rail installed on a workbench, and a feed rail slidably supported on the feed rail. a sheath feeding cylinder that is supported by the work table and moves the feeding table back and forth at a predetermined stroke; and an automatic sheath feeding chuck mechanism that is installed on the feeding table and automatically clamps the sheath; a sheath horizontal automatic throttling mechanism that is installed on the workbench beyond the moving range of the feed base in the feeding direction and that automatically squeezes the sheath from a horizontal direction; a sheath vertical automatic squeezing mechanism that is installed on the workbench at a predetermined distance in the front or rear of the sheath in the feeding direction and that automatically squeezes the sheath from the vertical direction; an automatic sheath clamping mechanism installed on the workbench at a position ahead of the sheath horizontal automatic throttling mechanism in the sheath feeding direction and automatically clamping the sheath being fed out; It is characterized by

(Function) If an automatic chuck mechanism for sheath feeding is mounted on the feed platform that moves while being guided by the rails on the workbench, and the feed platform is fed by a predetermined stroke using a sheath feed cylinder, the sheath can be fed at a constant pitch. It is possible to carry out the feed of the diaphragm, and the constriction portions can be easily provided at a constant pitch. In addition, since drawing is performed simultaneously using a sheath horizontal automatic drawing mechanism and a sheath vertical automatic drawing mechanism positioned on the workbench, drawing can be easily performed by aligning the horizontal and vertical drawing parts of the sheath in the correct direction. It can be performed.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. 1 to 7 show a first embodiment of the present invention. As shown in the figure, the sheath intermittent drawing apparatus of this embodiment has a workbench 2 supported horizontally by legs 1. An outer frame 3 is fixedly provided at a position near the starting end of the workbench 2, and rails 4 are fixedly provided along the longitudinal direction on both sides of the outer frame 3 in the width direction. A feed table 5 is slidably supported on these rails 4. The feed table 5 has a slider 5A at its lower part that fits into the side surface of the rail 4 so that it can slide.

An automatic sheath feeding chuck mechanism 6 for automatically chucking the sheath 1 is mounted on the feeding table 5. This automatic chuck mechanism for sheath feeding 6
has a frame 7 fixedly mounted on a feed base 5, and first and second air cylinders 8A and 8B are installed horizontally on the frame 7, and these first and second air cylinders Brackets 10 are vertically attached to the tips of piston rods 9A and 9B on both sides of piston rods 8A and 8B, respectively. Chuck pawls 11 for horizontally holding the sheath 1 are attached to the inward facing sides of both brackets 10, respectively.

A sheath feed cylinder 12, which is a cylinder that feeds the feed table 5 at a constant stroke, is fixed at the base end of the workbench 2, and the tip of a piston rod 13 of the cylinder 12 is connected to the feed table 5.
A sheath horizontal automatic diaphragm mechanism 14 for automatically squeezing the sheath 1 in the horizontal direction is installed on the workbench 2 beyond the moving range of the feeding platform 5 in the feeding direction.
This sheath horizontal automatic throttle mechanism 14 consists of a pair of hydraulic cylinders 15 fixedly installed on the workbench 2 on both sides in the horizontal direction with the passage of the sheath 1 in between, and a horizontal hydraulic cylinder 15 installed at the tip of the piston rod 16, respectively. directional sheath aperture claw 17.

Sheath 1 for sheath horizontal automatic diaphragm mechanism 14
A vertical frame 18 is provided at a predetermined distance in front in the feeding direction, and is fixed to the workbench 2. The vertical frame 18 is provided with a sheath vertical automatic diaphragm mechanism 19 that automatically diaphragms the sheath 1 in the vertical direction.

This sheath vertical automatic diaphragm mechanism 19
a pair of hydraulic cylinders 20 fixed to the vertical frame 18 on both sides in the vertical direction with a passage therebetween;
The piston rods 21 each have vertical sheath restricting claws 22 attached to their respective tips.

A horizontal frame 23 is fixed on the workbench 2 at a position ahead of the sheath vertical automatic diaphragm mechanism 19 provided at the tip in the sheath feeding direction in the sheath 1 feeding direction. This frame 23 is provided with an automatic sheath clamping mechanism 24 that automatically clamps the horizontal constriction portion of the sheath 1 that is sent.

This sheath automatic clamp mechanism 24
A pair of air cylinders 25 are fixed to the horizontal frame 23 on both sides in the horizontal direction with a passage between them.
and a sheath clamp claw 26 attached to the tip of the piston rod of the air cylinder 25.

The sheath 1 is further removed from the sheath automatic clamping mechanism 24.
A bifurcated sheath guide 27 is fixedly installed on the workbench 2 on the other side in the feeding direction.

Next, drawing of the sheath 1 using such an intermittent sheath drawing device will be described.

Initially, the sheath 1 has a length that reaches a position where a predetermined point on the distal end side of the sheath 1 can be drawn by the sheath vertical automatic drawing mechanism 19 when the automatic chuck mechanism 6 for sheath feeding advances to the position shown by the two-dot chain line. Then, the sheath is checked with the chuck pawl 11 of the automatic chuck mechanism 6 for sheath feeding at the retracted position shown by the solid line.

Next, the sheath feed cylinder 12 is operated to advance the feed table 5 by a predetermined pitch, and the sheath feed automatic chuck mechanism 6 thereon is placed at the position shown by the two-dot chain line.

At this position, while the sheath 1 is chucked by the sheath feed automatic chuck mechanism 6, the sheath horizontal automatic throttle mechanism 14 and the sheath vertical automatic throttle mechanism 19
are simultaneously operated to open the horizontal sheath aperture claw 17.
The sheath 1 is simultaneously squeezed in the horizontal and vertical directions by the vertical sheath squeezing claws 22 and the horizontal sheath squeezing portion 1A and the vertical sheath squeezing portion 1B as described above are formed at the same time.

When such drawing forming is started, the sheath feeding cylinder 12 is operated to move the feeding table 5 back by a predetermined pitch so that the sheath feeding automatic chuck mechanism 6 thereon can return to the position shown by the solid line.

When the automatic chuck mechanism 6 for sheath feeding is retracted, the sheath 1 is chucked again, and the horizontal sheath squeeze claw 17 and the vertical sheath squeeze claw 22 are separated from the sheath 1.

Thereafter, when the sheath feeding automatic chuck mechanism 6 is advanced to the position indicated by the two-dot chain line in the same manner, the horizontal constricted portion on the distal end side of the sheath 1 reaches the sheath automatic clamping mechanism 24, and the sheath 1 is moved to the sheath automatic clamping mechanism 24. While clamped by the mechanism 24, horizontal sheath drawing and vertical sheath drawing are performed as described above, and thereafter the above-described operations are repeated.

FIG. 8 shows a second embodiment of the present invention. In this embodiment, the sheath vertical automatic diaphragm mechanism 19
A sheath horizontal automatic throttling mechanism 28 having the same configuration as the sheath horizontal automatic throttling mechanism 14 is provided between the sheath automatic clamping mechanism 24 and a sheath vertical automatic throttling mechanism 29 having the same configuration as the sheath vertical automatic throttling mechanism 19. This shows an example in which the material No. 1 can be drawn and formed at four locations at the same time.

(Effects of the invention) As explained above, the sheath intermittent drawing device according to the invention has an automatic chuck mechanism for sheath feeding mounted on the feed table that moves guided by the rail on the workbench, and the sheath Since the feed cylinder is configured to feed the sheath by a predetermined stroke, the sheath can be fed at a constant pitch, and the constricted portion can be easily provided at a constant pitch. In addition, since drawing is performed by a sheath horizontal automatic drawing mechanism and a sheath vertical automatic drawing mechanism positioned on the workbench, drawing can be easily performed by arranging the horizontal drawing part and vertical drawing part of the sheath in the correct direction. Can be done. Therefore, according to the present invention, the sheath can be efficiently drawn intermittently at a constant pitch and at a predetermined angle.

In addition, since the installation position of the horizontal and vertical throttle mechanism cylinders of the sheath can be changed, the aperture dimensions can be changed, and the contact points of the delivery cylinder and the installation positions of the horizontal and vertical throttle mechanisms can be changed. The aperture pitch can also be changed.

[Brief explanation of drawings]

1 and 2 are a side view and a front view of a location example of the sheath intermittent drawing device according to the present invention, FIG. 3 is a sectional view taken along the line -- in FIG. 1, and FIG. 4 is a bottom view of FIG. 3. 5 and 6 are a plan view and a front view of the automatic chuck mechanism for sheath feeding, FIG. 7 is a front view of the distal end portion of the sheath horizontal automatic throttling mechanism, and FIG. 8 is an intermittent throttling of the sheath according to the present invention. 9 and 10 are plan views showing the schematic configuration of other embodiments of the molding device.
The figures are a side view and a front view showing an example of a sheath subjected to intermittent drawing. 1... Sheath, 1A... Horizontal sheath constriction section, 1B... Vertical sheath constriction section, 2... Workbench, 3... Outer frame, 4... Rail, 5... Feeding stand,
6... Automatic chuck mechanism for sheath feeding, 8A, 8
B...First and second air cylinders, 9A, 9B
...Piston rod, 10...Bracket, 11
...Chuck claw, 12...Sheath feeding cylinder, 13...Piston rod, 14...Sheath horizontal automatic throttle mechanism, 15...Hydraulic cylinder, 16
...Piston rod, 17...Horizontal sheath throttle claw, 18...Vertical frame, 19...Sheath vertical automatic throttle mechanism, 20...Hydraulic cylinder, 21
... Piston rod, 22 ... Vertical sheath aperture claw, 23 ... Horizontal frame, 24 ... Sheath automatic clamp mechanism, 25 ... Air cylinder, 26
...Sheath clamp claw.

Claims (1)

[Scope of utility model registration request] a feed rail installed on a workbench, a feeder supported slidably on the feeder rail, a sheath feed cylinder supported by the workbench and for moving the feeder back and forth with a predetermined stroke; an automatic chuck mechanism for sheath feeding that is installed on the feed table and automatically clamps the sheath; and an automatic chuck mechanism for sheath feeding that is installed on the work table beyond the movement range of the feed table and that holds the sheath from the horizontal direction. a sheath horizontal automatic throttling mechanism that automatically squeezes the sheath; and a sheath horizontal automatic throttling mechanism that is installed on the workbench at a predetermined distance in front or rear of the sheath feeding direction with respect to the sheath horizontal automatic throttling mechanism, and that moves the sheath vertically. a sheath vertical automatic diaphragm mechanism that automatically diaphragms the sheath; and an automatic sheath clamping mechanism that automatically clamps the sheath that is squeezed horizontally and vertically and sent out.