JPS6344236Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Purpose of the Invention> The present invention relates to a strip passing guide device for a strip connection welding machine, and more specifically, it relates to a strip passing guide device for a strip connection welding machine that welds a leading strip plate and a trailing strip plate. The present invention relates to a guide device that guides the lower surface of the strip along a pass line when moving the strip within a welding machine, and allows smooth strip threading.

Generally, a welding machine for connecting strips equipped with a shear device is equipped with a movable-side clamp device on the inlet and outlet sides of the line to position and hold the ends of both trailing strips facing each other. A fixed side clamp device is arranged.

As for the connection method using this type of welding machine,
After each end of both trailing strips is clamped and held at opposing positions by a clamping device, and both ends are fixed in position,
A shearing device enters between the clamping devices and simultaneously cuts the clamped ends of both plates using upper and lower shearing blades. Next, the movable clamp device moves forward, and after abutting the cut end faces against each other, for example, in the case of TIG welding or laser welding, a welding torch is run along the weld line formed by this butt part to join. It is common to do so.

In this case, the strip is normally passed through the pass line between the upper and lower clamps of both clamping devices, but the spacing between each clamping device is at least as small as the spacing between the shearing blades in order to ensure space for the shearing device to enter. It needs to be opened. Usually, rollers are provided on the outside of each clamping device to hold the strip on the pass line, but these rollers are generally spaced close to the inside of each clamping device because the distance between the rollers is wide. Not only will slack occur in the strip and the strip will come into contact with the lower clamp surface during line threading, damaging the strip surface and the clamp surface, but this will also cause damage to the strip surface and the clamp surface.
The heights of the clamp positions on the input and output sides are different, which causes misalignment in the vertical direction when the strips are butted together, causing unstable welding quality. In some cases, the tip of the strip may fall into the opening between the clamp devices, making threading extremely difficult.

The purpose of this invention is to solve these problems. Specifically, a guide roller is provided between the movable and fixed clamp devices so that it can be raised and lowered, and the guide roller is raised to the pass line during sheet threading. proposed a guide device that supports and guides the bottom surface of the strip being fed along the line, and that also has threading plates symmetrically provided on both sides of the guide roller to prevent the tip of the strip from falling. do.

<Structure of the invention> In other words, the invention passes through the moving side clamping device and the stationary side clamping device, which clamp and hold the ends of both the leading and trailing strips at opposing positions. It is characterized by a guide roller that guides the strip plate on the pass line and is movable up and down.

Therefore, this configuration and its operation will be explained in more detail with reference to FIG.

First, FIG. 1 is a front view of a guide device according to one embodiment of the present invention, in which a movable clamp device 1 and a fixed clamp device 2 are disposed on the entry and exit sides of the line, respectively. There is. During welding, the leading strip S ₁ and the trailing strip S ₂ are clamped in opposite positions by respective clamping devices 2, 1.
In these clamp devices 1 and 2, each upper clamp 1a and 2a is originally configured to be moved up and down by a fluid pressure cylinder (not shown) or the like.

Next, a guide roller 4 is provided between the movable clamp device 1 and the fixed clamp device 2. This guide roller 4 extends in a direction perpendicular to the direction of the pass line A of the steel strip, and its length is longer than the width of the strip, and guides the steel strip on the pass line A when passing the strip. . This guide roller 4 is configured to be able to move up and down, and this lifting/lowering means can be configured in any manner, but it can be configured as a fluid pressure mechanism as follows. That is, a fluid pressure cylinder 7 is fixed to a support frame 6, a roller support member 9 is pivotally attached to the tip of a piston rod 8 of this fluid pressure cylinder 7, and both ends of a guide roller 4 are rotatably supported on this support member 9. and support.

In addition, as described above, as the guide roller 4 is provided between the clamp devices 1 and 2 so as to be able to move up and down, a gap is created between the guide roller 4 and the clamp devices 1 and 2 on both left and right sides. Steel strip at plate time
The tips of S ₁ and S ₂ may get into the gap, making threading difficult. For this purpose, passing plates 10 are mounted on the support member 9, and these passing plates 10 are arranged symmetrically on both sides with the guide roller 4 in between. At this time, the passing plate 10 closes the gap, and when the supporting member 9 is raised together with the guide roller 4 by the fluid pressure cylinder 7, each clamping device 1,
Make sure to match the surface level of the lower clamp in step 2.

Further, it is preferable to prevent the guide roller 4 from wobbling laterally when guiding the steel strips S ₁ and S ₂ . Both ends of the support member 9 are inclined from this point to form shoulder portions 9a, and vibration prevention plates 11 are attached to these shoulder portions 9a.
The guide roller 4 is prevented from wobbling laterally by being pressed against the alignment inclined surfaces 1c, 2c of the guide rollers 1c, 2b.

Furthermore, regarding the effect of the guide device with the above configuration,
The usage of a strip connection welding machine equipped with this device will be explained as follows.

Prior to welding, the upper clamp 1a of the movable clamp device 1 is released from the lower clamp 1b, the upper clamp 2a of the stationary clamp device 2 is released from the lower clamp 2b, and the movable clamp device 1 is released from the lower clamp 2b.
and a shear device (not shown) are kept in their original positions.

In this state, the fluid pressure cylinder 7 is operated to move the support member 9 and the guide roller 4 to the lifting means 5.
to position the upper surface of the guide roller 4 at the height of the pass line A-A. At this time, the plate 10 for threading becomes approximately the same plane as the upper surface of each lower clamp 1b and 2b, and the vibration prevention plate 11 for preventing lateral vibration is placed on the matching inclined surface 1c and 2c of each lower clamp 1b and 2b, respectively. Being pushed.

Next, both the leading and trailing strips S ₁ and S ₂ are inserted into the clamping device on the pass line, and while passing between the respective clamping devices 1 and 2, they slide on the guide rollers 4 and pass through without any hindrance. Boarded. When the leading end of the threaded sheet passes between the clamps, it is supported by the threading plate 10, so the leading end smoothly rides on the guide roller without falling down, and is continuously fed smoothly.

Thus, when the trailing strip stops at the welding position with the end of the leading strip and the leading end of the trailing strip facing each other, the guide roller 4 descends from the pass line and returns to the position shown by the imaginary line in FIG. . Then,
The upper clamps 1a and 2a descend to fix the ends of both plates in position. and a shear device (not shown)
enters between each clamping device 1 and 2 from the direction across the line, shearing at the same time with the upper and lower shear blades and returning to the original position, after which the movable side clamping device 1 moves forward while clamping the strip and cuts both strips. Butt the ends together. The weld line formed by this butt is then immediately joined by arc welding, laser welding, or the like. When welding is completed, the upper clamp is released, and the guide roller 4 rises again in preparation for the next strip threading, guiding the lower surface of the strip at the pass line as described above.

<Effects of the invention> As explained in detail above, in the guide device according to the present invention, in a welding machine for connecting strips, a guide roller positioned on a pass line between each clamp device is provided so as to be movable up and down. , furthermore,
On the support member that supports the guide roller, a plate for passing the plate is disposed in the width direction of the plate at a position symmetrical to the guide roller so as to be substantially flush with the upper surface of the lower clamp. Therefore, line threading can be carried out smoothly without damaging the strip surface or clamp surface during strip threading.In addition, vibration prevention plates can be attached to the support members, and these vibration prevention plates can be lowered. By aligning it with the clamp, the guide roller can be reliably fixed and stabilized when rising.
It is possible to prevent the tip of the strip from falling between the clamp device and the guide roller, and by eliminating misalignment at the butt portion, it is possible to guarantee stable and uniform welding quality.

[Brief explanation of drawings]

FIG. 1 is a front view of a guide device according to one embodiment of the present invention. Symbols, 1... Moving side clamp device, 2... Fixed side clamp device, 4... Guide roller, 6... Frame, 7... Fluid pressure cylinder, 8... Piston rod, 9... Support member, 10... Plate for threading, 11... Vibration prevention plate.

Claims (1)

[Scope of utility model registration request] A guide for guiding the strip passing through these clamp devices on a pass line between a movable clamp device and a stationary clamp device that clamp and hold the ends of both the leading and trailing strips at opposing positions. A device for guiding a strip through a strip in a welding machine for connecting strips, characterized in that a roller is provided so as to be movable up and down.