JPS5848283B2 - Pipe tensioning device in pipe drilling equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a perforation device for a tubular body.

More specifically, the present invention relates to a pipe tensioning device in a drilling device for attaching a spring or the like to a winding shaft of a shutter.

Generally, when a shutter is installed on a building, the width of the shutter changes depending on the width of the front entrance.

As a natural consequence, the length of the winding shaft also changes.

FIG. 1 shows an example of a manually opening/closing type winding device, in which the shutter is wound up on a stay 3 fixedly installed between wheels 2, 2 attached to both sides of a winding shaft 1.

One end of a spring 4 is fixed to the wheel 2, and the other end is fixed to the winding shaft 1 with a bolt.

Reference numeral 5 denotes a shock spring, one end of which is fixed to an adjustment wheel 6 fixed to the winding shaft 1 with a cotter pin or the like.

Reference numeral 1 designates a stopper for the shock spring 5, which is loosely fitted onto the winding shaft 1, engages with the stay 3, and acts on the winding shaft 1 through the shock spring 5 in a manner opposite to that of the spring 4.

The wheel 2 is held by a washer 8 by a split pin or the like so that it does not move outward in the axial direction.

Reference numeral 9 denotes bolt holes for fixing both ends of the winding shaft 1 to a support device such as a bracket.

With the above configuration, the winding shaft 1 has a split pin hole 10 for fixing the shock spring adjustment wheel 6 in the center, for example, as shown in FIG. 2, and at equal distances from both ends of the winding shaft. Bolt hole 9 for fixing the shaft,
Split pin hole 11 for positioning wheel 2. In order to keep the spring 4 under tension until the spring fixing bolt hole 13 and the shutter are installed on site, it is necessary to drill symmetrically from both ends pin holes 12 for temporarily fixing the wheel 2.

Conventionally, this type of perforation work was done manually for each piece, which caused problems in terms of efficiency and accuracy.

Moreover, as the spring changed as the specifications changed, the fixing position also changed, making drilling work difficult.

In order to solve the above-mentioned problem, the inventor of the present invention only needs to supply a pipe cut to a predetermined length, then feed it to the appropriate processing position one by one, and automatically center the tool. We have devised an automatic drilling device that can perform the drilling process and automatically discharge the material from the drilling device.

The present invention relates to a tensioning device for pipe processing in this automatic drilling device.

DETAILED DESCRIPTION OF THE INVENTION Before explaining the pipe tightening device according to the present invention, a general description will be given of the entire process from supplying material to discharging the automatic drilling device in which the present invention is implemented.

Fig. 3 is a front view of the automatic pipe drilling device, Fig. 4 is a side view taken in the direction of the ■ arrow in Fig. 3, and Fig. 5 is a plan view of Fig. 3, with the right half of Fig. 4 omitted, that is, the material accumulation section. It is shown as follows.

In the figure, A indicates a material accumulation section, and a predetermined number of pipes P cut into various predetermined lengths based on a production plan are supplied to a supply table 21.

Then, the material is carried upward by the claws 24 of the endless conveyor 23 driven vertically by the drive device 22, and sent to the top of the material accumulation shelf 25 formed in a zigzag shape with a downward slope.

In this case, it is preferable that pipes of the same length are sequentially sent to the collecting shelf 25.

The ends of the pipes accumulated on the accumulation shelf 25 of the material accumulation section A are aligned one by one by the end alignment device 41 starting from the bottom one, and then transferred to the next processing section C by the single pipe feed device B.
It is supplied in accordance with the processing timing.

Since the processing section C drills a plurality of holes symmetrically at points equidistant from both ends of the pipe P, a plurality of tool rests are symmetrically provided.

One end is comprised of movable tool rests C, , C2, and the other end is comprised of movable tool rest C3 and fixed tool rest C4.

Incidentally, the hole 10 shown in FIG. 2, that is, the pin hole for fixing the adjustment wheel 6 of the shock spring, is formed by a center drilling device D.

On the movable turrets C, ~C3 and the fixed turret C4, there are drilling devices consisting of self feeders 26 arranged horizontally and facing each other perpendicularly to the pipe, and between these drilling devices there is a clamp for the pipe P. A device 27 and pipe transfer rollers 28 are provided.

The movable turret C1 is moved by rotating a moving screw 31 via a belt 30 from a motor 29 with a brake provided on one side of the bed, and screwing this into a female screw attached to the movable turret C. This is done by

Further, movement of the movable tool rests C2 and C3 is performed by rotation of a brake motor 33 and a screw 34 installed on the lower surfaces of the movable tool rest C and the fixed tool rest C4.

Of course, the female screw that engages with the screw is the movable tool rest C2, C.
It is attached to the bottom of 3.

The center drilling device D consists of a movable saddle 36 attached to the front sliding surface of a bolt-shaped frame 35 attached to the end of the bed and above the fixed tool rest C4, and a self-eating device 31 attached vertically thereon. ing.

This saddle 36 is movable left and right, and a screw shaft 39 rotates from the drive shaft of the movable tool post via a chain 38.
This is done by

Note that 40 is a holding device for the pipe P when drilling the center part.

With the above structure, the following steps are generally performed to drill the pipe P using the present drilling apparatus.

In the following explanation, a case will be explained in which pipes of the same length are processed.

Therefore, in this case, the movable turret C3 and the fixed turret C4
is always set in the fixed position.

Furthermore, the movable tool rests C1 and C2 move integrally, and their relative positions do not change.

1) Start the conveyor motor 22 of the accumulating device A and input the pipe P.

The pipes are continuously fed from the lower end of the accumulating device A to the single pipe feeding device B.

2) When the ends are aligned in the single pipe feeder B, the movable tool rests C1 and C2 are activated and stopped at the fixed positions by signals from the two proximity switches.

When the movable tool rests C1 and C2 stop, the pipe P destined for one piece is supplied to the processing section C.

3) The sizing cylinder 45 of the tool rest is temporarily set to be slightly larger than the length of the pipe P to be machined.

When the limit switch on the turret detects that the pipe has fallen, this signal activates a) Sizing cylinder 4.
At step 5, the pipe is brought into contact with the pipe end stopper 44.

b) Fix the pipe while raising it slightly using the clamping device 27, and align the centers of the tool and the pipe.

C) At the same time, the holding device 40 located near the center drilling device D descends and holds the pipe P.

d) Drilling starts by the operation of the self feeders 26 and 37. e) At the same time as the processing is completed, the stopper 44 moves.
The clamp device 27 and the holding device 40 are opened.

f) The delivery roll 42 descends and the transfer roller 28
g) Rapid discharge due to acceleration by the vinch roller 43 h) Pipe end stopper 44 returns and waits for material supply for the next processing.

The present invention relates to a pipe tensioning device 2γ, 40 in the processing section C of the automatic pipe drilling apparatus as described above, and will be described in detail below.

When the ends of the pipes P are aligned by the single pipe feeder B, the pipes P are fed to the processing section by a signal from a limit switch.

When the supply of the pipe is detected by the signal from the limit switch on the tool rest, the sizing cylinder 45 extends and the end of the supplied pipe hits the stopper 44 and is set at the normal machining position.

When the pipe P is set at the normal processing position, a signal is issued to activate the clamp device 27, and the pipe P is tightened by the clamp claws 46 provided in a horizontal position and facing each other.

At the same time, the holding device 40 in the center also descends to clamp the pipe and start drilling.

One set of clamp devices 2γ is provided on each of the movable tool rest and the fixed tool rest.

The clamp device 27 includes a claw 46 that grips the pipe P, and an air cylinder 47 that moves the pipe forward and backward.

The clamp claw 46 is a V-shaped double-clamp type as shown in FIG.

As described above, when the pipe P is supplied to the processing section, the sizing cylinder 45 operates and positions it, and then the ■-shaped claw 46
clamps the pipe P, but at this time the pipe P floats a short distance and comes into alignment with the orifice device.

At the same time, it facilitates clamping by the holding device 40 for center hole drilling.

Figures 1 to 8 show a holding device for the center of the pipe.

The holding device 40 is attached to the portal frame 35 via the bracket 4γ.
installed on.

The bracket 47 consists of two parallel vertical support plates 47a, 47.
It has b.

48.49 is a crank arm, vertical support plate 47a,
The center portion thereof is pivotally connected by a pin 50 supported at the lower end of 47b.

The lower ends of the crank arms 4B and 49 have grooves 51 and 52 for holding the pipe P therebetween.

The upper ends of the crank arms 48, 49 are connected to pins 53. 5
The vertical support plates 41a and 47b are pin-coupled 51 via tension plates 55 and 56 connected at 4.

58 is a knuckle whose upper end is fixed to the rond of the air cylinder 59, and whose lower end is connected to the pin 57.

60 is a long hole provided in the vertical support plates 47a, 47b;
Since the pin 5γ is inserted through this elongated hole 60, it can be lowered without difficulty when the air cylinder 59 is extended.

Now, when the air cylinder 59 is extended by a command from the limit switch, the knuckle 58 is lowered.

Then, the pin 57 descends along the elongated hole 60, so that the crank arm 48 is
, 49 is widened, the lower end of the crank arm is compressed by the lever action and can hold the pipe.

Thus, the pipe P is connected to the clamping device 27 and the holding device 4.
0, the horizontal position and vertical position are tightened.

As a matter of course, if it is not necessary to drill a hole in the center, a holding device for the center is not required.

As described above, according to the present invention, by the command of the limit switch,
Once the pipe is in place, a horizontally moving clamping device automatically aligns the pipe with the center of the tool.

At the same time, even when it is necessary to drill a hole in the center, it automatically maintains the vicinity of the machining position, preventing bending and enabling highly accurate machining.

[Brief explanation of drawings]

Fig. 1 is a winding device for a lightweight shutter (perspective view), Fig. 2 is a sectional view of the winding shaft, Fig. 3 is a front view of a pipe drilling device implementing the present invention, and Fig. 4 is the same as that shown in Fig. 3. ■A side view in the direction of arrows, Figure 5 is a top view of Figure 3, Figure 6 is a detailed view of the claw part of the clamping device, Figure γ is the holding device in the center of the pipe, Figure 8 is the left side of Figure 1. Surface diagram.

Claims (1)

[Claims] 1. A limit switch that detects that the pipe P is supplied from the single pipe feeder B, and a sizing cylinder that presses one end of the supplied pipe in response to a signal from the limit switch and presses the other end against the stopper. 4
5, and one or more pairs of tool rests C1, C2, C3, C4 provided on both sides of the pipe and equipped with opposing ■-shaped claws,
a drive device that moves each tool post in a direction perpendicular to the longitudinal direction of the pipe after the sizing cylinder is actuated;
Cylinder 59 and cylinder 5 provided above the center of
A pipe tightening device in a pipe drilling device comprising a holding device which is opened and closed by a piston rond and holds the pipe.