JPH06328315A - Bar cutting device - Google Patents

Abstract

PURPOSE:To prevent a flaw from being made in a cutter part and a bar itself when the bar is transferred by vertically dividing upstream and downstream cutting blades cutting the thread material respectively, and also providing the blades elevatably respectively. CONSTITUTION:An upstream upper part cutting blade 12 and respective small downstream side upper part cutting blades 33 are risen, also the lifting plate 61a of a lifting device 61 is lifted to a given height, plural bars A are inserted in an exit opening part 4 from an inlet opening part 3, and the cut portions of the bars A are positioned between upstream and downstream cutting blades 5 and 6. Next, a pushing member 24 is moved by a movement apparatus to lower the upstream upper part cutting blade 12 to retain the bar A by its blade part 5a. Then the respective bars A are cut in turn by lowering a slide body 51 to lower the respective small downstream upper part cutting blades 33 in order via a adjusting plate 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip cutting device for cutting strips such as bar steel into a predetermined length.

[0002]

2. Description of the Related Art Conventionally, as a cutting device for cutting a round steel bar (round bar), for example, there is one disclosed in JP-A-60-259313.

This cutting device, as shown in FIGS. 4 and 5, has a fixed-side cutting blade 10 having a circular blade portion 102 formed therein.
1 and a movable side cutting blade 103 in which a circular blade portion 104 is also formed.

When the steel bar A is cut, the steel bar A is inserted into the circular blade portions 102, 104 of the fixed-side cutting blade 101 and the movable-side cutting blade 103, that is, the cutting surface is held in that shape. Since it is cut in the state of being cut, the deformation of the cut surface at the time of cutting is prevented.

[0005]

However, according to the above-mentioned cutting device, the steel bar is cut with almost no deformation, but the actual cutting surface is slightly deformed and burrs are generated. Then, when the steel bar is transferred by a predetermined length, there is a problem that the cutting blade itself is damaged and the steel bar itself fed inside the circular blade part is also damaged.

[0006] Therefore, an object of the present invention is to provide a strip cutting device which can solve the above problems.

[0007]

In order to solve the above-mentioned problems, the first means of the present invention is to provide an upstream cutting blade and a downstream cutting blade for cutting a horizontally-transferred strip at a predetermined length. A strip cutting device having a side cutting blade, wherein the upstream side cutting blade and the downstream side cutting blade are vertically divided into two parts, and a blade part conforming to the shape of the strip is formed on each divided surface. The divided upstream upper cutting blade is vertically movable, the divided downstream lower cutting blade is vertically movable, and a biasing member for biasing and supporting the downstream lower cutting blade upward is provided. Provided, the downstream side upper cutting blade is provided so as to be able to move up and down, and a supporting member for supporting the downstream side upper cutting blade at a predetermined height above the downstream lower cutting blade is provided and supported by the supporting member. Press the upper cutting blade on the downstream side downward A strip material cutting apparatus provided with a pressure body.

In order to solve the above-mentioned problems, the second means of the present invention is an upstream device for cutting each strip, which is transported in a horizontal direction at a predetermined interval and in parallel with each other, at a predetermined length. A strip material cutting device having a side cutting blade and a downstream side cutting blade, wherein the upstream side cutting blade is vertically divided into two parts, and a strip surface of a position corresponding to each strip material to be transferred Forming blade parts that match the shape, the divided upstream upper cutting blade is provided to be vertically movable by an elevating device, and the downstream cutting blade is divided in the width direction according to each strip, and the width direction Each of the small downstream cutting blades divided by 2 is vertically divided into two parts, and each of the divided small downstream lower cutting blades is provided to be movable up and down, and each small downstream lower cutting blade is biased and supported upward. Each urging member is provided, and the above small downstream side upper cutting Provided with freely up and down,
A supporting member for supporting each of these small downstream upper cutting blades at a predetermined height above the small downstream lower cutting blades is provided, and pressing for pressing each small downstream upper cutting blade supported by this supporting member downward. A body is provided, and a stepped portion having a different height is provided on either the small-downstream-side upper cutting blade or the pressing body so that the descending of each small-downstream-side upper cutting blade is sequentially shifted when the pressing body is pressed down. It is provided.

[0009]

According to the structure of the above-mentioned first means, the upstream cutting blade and the downstream cutting blade for cutting the strip are divided into upper and lower halves, respectively, and are provided so as to be vertically movable.
When the strip material is transferred, by raising the upper cutting blade, it is possible to transfer the strip material as compared to the case where the blade part of the cutting blade is an integral body that matches the shape of the strip material to be cut. At times, it is possible to prevent the blade portion and the strip itself from being scratched.

Further, according to the structure of the second means of the present invention, the upstream cutting blade and the downstream cutting blade are formed with a plurality of blade portions conforming to the shape of the strip and are held by the upstream cutting blade. When cutting the strip material by lowering the downstream upper cutting blade, the step portion can sequentially shift the descending of each small downstream upper cutting blade, so when cutting multiple strip materials It is possible to reduce the cutting force.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, a cutting device for sequentially cutting a plurality of strips, for example, circular steel bars (round bars), which are transported in parallel in a horizontal direction at predetermined intervals, for each predetermined length. Will be described.

1 to 3, reference numeral 1 denotes a frame main body of a cutting device, in which a space portion 2 having a predetermined width and a predetermined length (correctly, thickness) is formed in the center, and the upstream side thereof. In the front wall portion 1a (upstream side in the bar steel transfer direction),
An inlet opening 3 for the steel bar is formed, and an outlet opening 4 for the steel bar is formed in the rear wall 1b.

An upstream side cutting blade 5 and a downstream side cutting blade 6 are inserted in the space 2 so as to be vertically slidable relative to each other. The upstream side cutting blade 5 is vertically 2
Blades that match the shape of the steel bars, semicircular blades 5a and 5b in the present embodiment, are formed on the divided surfaces at positions corresponding to the respective steel bars to be transferred and transferred.

The upstream lower cutting blade 11 thus divided is
The blade portion 5b is supported in the frame body 1 so as to have a predetermined cutting height. Further, the divided upper upstream cutting blade 12 can be raised and lowered at a predetermined distance by a lifting device 14 via a connecting member (for example, I-shaped steel etc. is used) 13 attached to the upper portion thereof. Has been done.

That is, the elevating device 14 is arranged so as to be able to ascend and descend at appropriate places (three places in this embodiment) on the upper wall portion 1c of the frame body 1 and is connected to the upper part of the upstream side upper cutting blade 12. Holding body 21 for holding the member 13
And the holding body 2 is arranged on the upper wall portion 1c of the frame body 1 which is arranged in the upper part of the space chamber 21a in the holding body 21.
A biasing member that biases 1 upward, such as a compression spring 22,
The wedge body 23 having the upper inclined surface 23a placed on the upper surface of the connecting member 13, and the wedge body 23 and the upper wall portion 1c of the frame body 1 are inserted, and the upper inclined surface 2 is formed.
A pressing member 24 having a lower inclined surface 24a that is in sliding contact with 3a.
And a moving device (for example, a cylinder device) 25 that moves the pressing member 24 in the horizontal direction.

Therefore, by moving the pressing member 24 in the width direction of the upstream upper cutting blade 12 (direction of arrow a) by the moving device 25, both the inclined surfaces 23a, 24a.
The sliding contact of the upper cutting blade 12 moves the upstream upper cutting blade 12 up and down by a predetermined distance. That is, the steel bar A to be cut can be held or released by the upper and lower semicircular blade portions 5a and 5b.

Further, the downstream side cutting blade 6 is composed of a plurality of small downstream side cutting blades 31 divided by a width corresponding to each steel bar (a width slightly wider than the steel bar), and further, each small downstream side. The cutting blade 31 is vertically divided into two,
Similar to the upstream cutting blade 5, semicircular blade portions 31a and 31b are formed on the respective divided surfaces.

Each of the divided small downstream side lower cutting blades 32
Is a compression spring (an example of a biasing member) which is provided in the space 2 so as to be able to move up and down and is arranged at the lower part thereof.
It is biased and supported by 34 upward. It should be noted that each of these small downstream side lower cutting blades 32 has a stopper 35 on its lower surface that projects into a guide space portion 7 formed in the lower wall portion 1d of the rear portion of the frame body 1 so as to stop at a predetermined cutting position. Is provided.

Further, each of the divided small downstream upper cutting blades 33 is arranged so as to be able to move up and down in the space portion 2 above each small downstream lower cutting blade 32, and at the same time, each small downstream lower cutting blade is cut. The support member 36 is provided at a predetermined height position from the upper surface of the blade 32.
It is supported so that it can be moved up and down. This support member 36
Is swingably supported on the rear wall portion 1b of the frame body 1 via a horizontal support pin 41 in the vertical plane, and its front end portion 42a is inserted through the through hole portion 8 to form a small downstream upper cutting blade. The support lever 42 is engaged with and disengageable from the engagement recess 33a formed in the rear surface of the support lever 33, and a pressing member for pressing the rear end of the support lever 42 downward, for example, a compression spring 43. The support height position of the downstream upper cutting blade 33 is positioned by the support lever 42 contacting the upper surface of the through hole portion 8.

The upper wall 1c of the frame body 1 is
Each steel bar A held by the upstream cutting blade 5 is cut along the width direction of the cutting blade from one direction to the other by sequentially pressing each small downstream upper cutting blade 33 downward. A ride body (an example of a pressing body, which is driven via, for example, a flywheel 52) 51 for performing an operation is provided.

Then, as described above, in order to sequentially push down each small downstream upper cutting blade 33, the stepped portion 53 is formed at the upper end of each small downstream upper cutting blade 33. Height adjusting plates 54 having different thicknesses are sequentially attached.

Therefore, when the slide body 51 descends, for example, in FIG. 2, the downstream upper cutting blades 33 descend sequentially from the right end to the left end. That is, the cutting is sequentially performed to reduce the cutting force.

At the upstream side position of the frame body 1,
While guiding each steel bar A to the inlet opening 3,
In order to prevent the steel bar A from coming into contact with the lower blade portions 5b and 31b during the transfer of the, a lifting device 61 for lifting the steel bar A by a predetermined height is arranged.

Further, on the downstream side of the frame body 1, there is arranged a supporting device, for example, a roller conveyor 62, for holding the steel bar protruding from the outlet opening 4, that is, the bar steel A cut to a predetermined length. When the cutting end of the steel bar descends during cutting, this roller conveyor 6
2 is tilted downward at least on its upstream side.

Next, the cutting operation of the steel bar will be described.
First, the upstream upper cutting blade 12 and each of the small downstream upper cutting blades 33 are raised, and the lifting plate 61a of the lifting device 61 is lifted to a predetermined height as shown by the phantom line in FIG. In, a plurality of (for example, eight) steel bars A are inserted from the inlet opening 3 through the outlet opening 4, and the cutting position is exactly at a position between the upstream cutting blade 5 and the downstream cutting blade 6. I will come.

When the cutting point is positioned, as shown by the solid line in FIG. 1, the lifting plate 61a of the lifting device 61 is shown.
Is lowered, and each steel bar A is placed on each of the blade portions 5b and 31b of the upstream lower cutting blade 11 and the small downstream lower cutting blade 32.

Next, the pressing member 24 is moved by the moving device 25.
Is moved to lower the upstream side upper cutting blade 12, and the steel bar A is held by the blade portion 5a. Next, the slide body 51 is lowered, and the small downstream upper cutting blades 33 are sequentially lowered via the adjusting plate 54, whereby the steel bars A are sequentially cut.

Of course, when each small downstream upper cutting blade 33 is lowered, the support lever 42 of the support member 36 is released and the compression spring 34 is contracted.
With this compression spring 34, the small downstream side lower cutting blade 32 is raised to a predetermined height and the small downstream side upper cutting blade 33 is provided.
Is compressed via the support lever 42 of the support member 36.
By 3, the original raised position is returned.

Thus, at the time of cutting, each upper cutting blade 1
As 2 and 33 descend, each of the steel bars A is cut in order from one end side to the other end side along the width direction of the cutting blade. Therefore, as compared with the conventional case where the blade portion of the cutting blade is a circular integral body, the upper cutting blades 12 and 33 rise during the transportation of the steel bar, which may damage the blade portion and the steel bar itself. Almost none, and each bar A
Since they are cut in order, the required cutting ability is small.

In the above embodiment, in order to slightly shift the descending timing of the plurality of small downstream upper cutting blades 33, the adjusting plates 54 having different thicknesses are provided at the upper ends of the small downstream upper cutting blades 33. Was provided, for example, the slide body 5
You may make it attach the adjustment plate 54 for forming the step part 53 to the lower surface of 1.

By the way, in the above-mentioned embodiment, the cutting device applied to the case where a plurality of steel bars are transferred and cut together has been described, but of course, only one steel bar is transferred and sequentially cut to a predetermined length. It can also be applied to a device that cuts into pieces.

In this case, the upstream cutting blade described in the above embodiment is provided with only one blade portion, and the downstream cutting blade is not divided in its width direction. The stepped portion provided on the downstream upper cutting blade (or the slide body) is not necessary, and the other components are the same.

Further, in the above embodiment, the case where the bar material to be cut is a circular steel bar has been described, but in addition to this, the present invention is also applied to the case of cutting a bar having a polygonal cross section or a mountain shape. It is possible.

[0034]

As described above, according to the first configuration of the present invention, the upstream cutting blade and the downstream cutting blade for cutting the strip are vertically divided into two parts, respectively, and are provided so as to be vertically movable. Since the upper cutting blade can be raised during the transfer of the strip, unlike the conventional case where the blade part of the cutting blade is a single piece that matches the shape of the strip to be cut, When the material is transferred, the blade portion and the strip itself are hardly scratched.

Further, according to the second aspect of the present invention, the upstream cutting blade and the downstream cutting blade are formed with a plurality of blade portions conforming to the shape of the strip, and the strip held by the upstream cutting blade is formed. When cutting the material by lowering the downstream upper cutting blade,
Since the descending portions of the small downstream upper cutting blades are sequentially displaced by the stepped portions, the cutting force can be reduced when cutting a plurality of strips.

[Brief description of drawings]

FIG. 1 is a sectional view of a strip cutting device according to an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a view taken along the line BB of FIG.

FIG. 4 is a front view of a cutting blade in a conventional cutting device.

5 is a cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

 1 Frame Main Body 5 Upstream Cutting Blades 5a, 5b Blade 6 Downstream Cutting Blade 11 Upstream Lower Cutting Blade 12 Upstream Upper Cutting Blade 14 Lifting Device 31 Small Downstream Cutting Blades 31a, 31b Blade 32 Small Downstream Lower Cutting Blade 33 Small upper cutting blade 34 Compression spring 36 Support member 51 Slide body 53 Step portion 54 Adjustment plate

Claims (2)

[Claims] 1. A strip cutting device having an upstream side cutting blade and a downstream side cutting blade for cutting a strip material transported in a horizontal direction at predetermined lengths, the upstream side cutting blade and The downstream cutting blade is vertically divided into two parts, and a blade portion matching the shape of the strip is formed on each of the divided surfaces, and the divided upstream upper cutting blade is provided so as to be movable up and down. A lower cutting blade on the downstream side is provided so that it can be raised and lowered,
An urging member that urges and supports the downstream lower cutting blade upward is provided, and the downstream upper cutting blade is provided so as to be able to move up and down, and the downstream upper cutting blade is positioned above the downstream lower cutting blade by a predetermined height. A strip cutting device, comprising: a support member that is supported at a position; and a pressing body that presses a downstream upper cutting blade supported by the support member downward. 2. A strip cutting device having an upstream side cutting blade and a downstream side cutting blade for cutting each strip, which is transported at a predetermined interval in a horizontal direction and in parallel with each other, at a predetermined length. Therefore, the upstream side cutting blade is divided into upper and lower parts, and a blade portion matching the shape of the strip material is formed on each division surface at a position corresponding to each strip material to be transferred. The upper side cutting blade is provided so that it can be raised and lowered by the lifting device.
The downstream cutting blade is divided in the width direction according to each strip, and the small downstream cutting blade divided in the width direction is vertically divided into two parts, and the divided small downstream lower cutting blades are divided into two parts. In addition to being provided so as to be able to move up and down, each of the small downstream side lower cutting blades is provided with an urging member for urging and supporting upwardly, and each of the small downstream side upper cutting blades is provided so as to be able to move up and down, and each small downstream side upper cutting A support member is provided for supporting the blade at a predetermined height above the small downstream lower cutting blade, and a pressing body for pressing each small downstream upper cutting blade supported by this support member downward is provided, and One of the downstream side upper cutting blade or the pressing body is provided with a stepped portion having a different height so that the descending of each small downstream side upper cutting blade is sequentially shifted when the pressing body is pressed down. Strip cutting device.