JP6776784B2 - Cutting method for long brittle members and cutting device for long brittle members - Google Patents

Description

The present invention relates to a method for cutting a long brittle member, a technique for cutting a short brittle member, and a technique for cutting a long brittle member. More specifically, a long tubular body made of a brittle material such as glass, crystallized glass, or ceramics. The present invention relates to a method for cutting a long brittle member, a method for cutting a long brittle member, a short brittle member obtained by cutting, and a technique for a cutting device for a long brittle member.

For example, in a tube glass production line used for electronic devices such as reed switches and transponders, it is customary to cut a plurality of long tube glasses, which are long brittle members, into a desired length. ..
As a cutting method for cutting a brittle member such as tube glass, a scrib line (ruled line) is engraved on the surface of the brittle member by a cemented carbide cutter, a laser, or the like, and the brittle member is folded along the scrib line. A method of dividing and dividing has been conventionally known.
Specifically, in "Patent Document 1", a glass plate, which is a brittle member, is scribed on the surface side of the boundary between the first region and the second region of the glass plate, and the first region of the glass plate is formed. A part or all of the support means is supported, and when the support is made, a part or the whole of the second region of the glass plate is projected from one end of the support means, and the brittle is placed around one end of the support means. The glass plate is placed by applying an external force from the surface side to the second region of the glass plate in a state where the first region of the glass plate is fixed to a part of the support means by the fixing means. A technique relating to a glass plate folding method (cutting method) for dividing a glass plate starting from a brittle is disclosed.
Further, also in "Patent Document 2", a glass plate which is a brittle plate material having a scribing line formed on the upper surface thereof, an anvil having a pair of downward protrusions and a recessed portion between the protrusions, and the anvil. A technique relating to a method (cutting method) for cutting a brittle plate material is disclosed, in which the brittle member is folded and split along the scribing line by sandwiching the brittle member from above and below with an upward pusher that moves away from and away from the recessed portion.

JP-A-2009-227550 Japanese Unexamined Patent Publication No. 2013-433348

When a plurality of long tube glasses, which are long brittle members, are cut to a desired length by using the cutting methods shown in the above-mentioned "Patent Document 1" and the above-mentioned "Patent Document 2", they are obtained by cutting. The shorter the cutting length (overall length) of the short tube glass, the more likely it is that brittleness will occur at the cut end of the short tube glass and that the cut end of the long tube glass will be chipped. There was a lot of tendency.
Further, the short tube glass obtained by cutting is configured to be collected by, for example, a receiving jig arranged directly underneath, but in this case, the short tube glass immediately after cutting has a tip portion. Since it falls on the receiving jig with (the end opposite to the cut end) facing down, the impact due to the collision between the tip and the receiving jig is unavoidable, and a short tube glass Fatal defects such as chips, cracks, and cracks were likely to occur at the tip of the glass.

The present invention has been made in view of the current problems described above, and cuts a long brittle member while preventing tsuno, chipping, etc. from occurring at the cut end portion, and also chips at the end portion. A method of cutting a long brittle member capable of recovering a short brittle member obtained by cutting while preventing the occurrence of fatal defects such as cracks and cracks, a short brittle member, and a long brittle member. It is an object to provide a cutting device for brittleness.

The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.

That is, in the method for cutting a long brittle member according to the present invention, the long brittle member is placed on a first platen with one end protruding outward, and the long brittle member is pressed down. By a holding step of pressing and holding by a jig, a support step of supporting an intermediate portion of one end of the long brittle member held by the holding step in a state of being pushed up by an anvil, and the support step. An engraving step of engraving a scribing line at one end of the supported long brittle member on the upper side opposite to the lower part in contact with the anvil, and engraving the scribing wire by the engraving step. At one end of the long brittle member, one end of the long brittle member is folded by abutting the projecting member downward at the tip opposite to the holding jig side. A method for cutting a long brittle member, comprising a cutting step of split cutting and a recovery step of receiving and collecting the short brittle member obtained by cutting by the cutting step on a second platen. In the cutting step, the separation distance from the fulcrum point supported by the anvil to the force point point abutted by the projecting member on the long brittle member and the holding distance from the fulcrum point point by the holding jig. The separation distance to the point of action is set at equal intervals, and one end of the long brittle member is pressed by a pressing member provided on the anvil side of the projecting member to form the second platen. It is characterized in that one end of the long brittle member is broken while being pressed upward.

As described above, in the cutting method of the present invention, the cutting point of the long brittle member, that is, the fulcrum point where the long brittle member is supported by the anvil, and the force point point where the long brittle member is brought into contact with the projecting member. Since the separation distance to and the separation distance from the fulcrum point to the point of action where the long brittle member is held by the presser foot are set to be equal, the length at the time of split cutting. A substantially equal external force is applied to the shaku brittle member at the point of effort and the point of action. As a result, in the cut long brittle member, a smooth cut end face can be stably obtained while preventing horns, chips and the like from being generated at the cut end.
Further, in the cutting method of the present invention, one end of the long brittle member is folded while being pressed onto the second surface plate by a pressing member provided on the projecting member. I'm going to break it. As a result, it is possible to prevent the short brittle member, which is cut off from the long brittle member and falls off, from falling onto the second surface plate in an excessively inclined state.

Further, in the method for cutting a long brittle member according to the present invention, in the second surface plate, a pop-out prevention plate having a height higher than that of the second surface plate is provided on the side opposite to the anvil side. It is characterized by being prepared.

By having such a configuration, it is possible to prevent the short brittle member that jumps due to the reaction at the time of split cutting from jumping over the second surface plate and falling off.

Further, the method for cutting a long brittle member according to the present invention is a step on the upper surface of the second surface plate in a region opposite to the anvil side, which is lower in height than the second surface plate. It is characterized by providing a part.

By having such a configuration, even if the short brittle member immediately after cutting falls on the second surface plate with the tip portion inclined downward, the above-mentioned It is possible for the tip portion to sufficiently avoid collision on the second surface plate, and one end of the short brittle member is struck on the second surface plate, and the tip portion is cracked, cracked, cracked, etc. It is possible to prevent the occurrence of fatal defects.

Further, the method for cutting a long brittle member according to the present invention is a U-shaped cross section extending along the long brittle member held by the holding jig on the upper surface of the second surface plate. Alternatively, it has a V-shaped groove, and the total length of the groove is 50% or more of the total length of one end of the short brittle member obtained by cutting.

By having such a configuration, the short brittle member obtained by cutting can be easily held in a predetermined posture while being regulated by the groove portion.
Further, by setting the total length of the groove to 50% or more of the total length of the short brittle member obtained by cutting the groove, the short brittle member wobbles when the short brittle member is received on the second surface plate. One end of the short brittle member can be stably held on the second surface plate through the groove without falling off from the second surface plate.

Further, in the method for cutting a long brittle member according to the present invention, the projecting member is formed of a resin, and the pressing member is formed of an elastic member.

In this way, by forming the projecting member with resin, when the long brittle member is split, chips, cracks, cracks, etc. occur at the points where the projecting member comes into contact with the projecting member. It is possible to prevent the occurrence of fatal defects.
Further, when the short brittle member obtained by folding and cutting is pressed by forming the pressing member with an elastic member, the short brittle member is deformed by itself, so that an excessive pressing force is applied to the short brittle member. Can be prevented.

Further, in the method for cutting a long brittle member according to the present invention, the holding member extends downward and has an inclined portion inclined toward the anvil side with respect to a virtual vertical surface, and the virtual member. The inclination angle formed by the vertical surface and the inclined portion is 0 ° or more and less than 90 °.

By having such a configuration, even if the short brittle member obtained by folding and cutting tries to incline the tip portion downward due to the reaction thereof, the short brittle member is located through the lower end portion of the inclined portion of the holding member. It will be pushed back onto the second surface plate, and the short brittle member will be stably held in the horizontal posture.
Further, by setting the inclination angle θ of the inclined portion of the pressing member with respect to the virtual vertical plane within such a range of 0 ° to less than 90 °, the inclined portion of the pressing member advances the folding operation. As a result, its own shape can be appropriately deformed, and an appropriate pressing force can always be applied to the short brittle member.

Further, the short brittle member according to the present invention is a short brittle member obtained by cutting by the method for cutting a long brittle member according to any one of the above, and is made of a tube glass having an outer diameter of 5 mm or less. It is characterized by.

In the case of cutting such a tube glass having a diameter of 5 mm or less, the cutting method in the present invention exerts the effect of the present invention more clearly.

Further, in the short brittle member according to the present invention, the total length of the short brittle member is 20 mm or less.

In the case of cutting the tube glass with such a predetermined length of 20 mm or less, the cutting method in the present invention exerts the effect of the present invention more clearly.

Further, in the cutting device for a long brittle member according to the present invention, a first platen on which the long brittle member is placed with one end protruding outward and on the first platen. A holding jig that presses and holds the long brittle member, an anvil that supports an intermediate portion of one end of the long brittle member held by the holding jig in a raised state, and an anvil. At one end of the long brittle member supported by, a scribing line is engraved on the upper side opposite to the lower part in contact with the anvil, and then the presser foot at one end of the long brittle member. A projecting member that abuts downwardly against the tip on the opposite side of the jig side and splits and cuts one end of the long brittle member, and a short brittleness obtained by cutting by the projecting member. A cutting device for a long brittle member including a second platen for receiving and collecting the member, and the projecting member from a fulcrum portion supported by the anvil on the long brittle member. The separation distance to the contact point point and the separation distance from the fulcrum point to the action point held by the holding jig are set at equal intervals, and are provided on the anvil side of the projecting member. The long brittle member is provided with a pressing member that presses one end of the long brittle member onto the second platen when the long brittle member is broken.

As described above, in the cutting apparatus of the present invention, the cutting point of the long brittle member, that is, the fulcrum point where the long brittle member is supported by the anvil, and the force point point where the long brittle member is brought into contact with the projecting member. Since the separation distance to and the separation distance from the fulcrum point to the point of action where the long brittle member is held by the presser foot are set to be equal, the length at the time of split cutting. A substantially equal external force is applied to the shaku brittle member at the point of effort and the point of action. As a result, in the cut long brittle member, a smooth cut end face can be stably obtained while preventing horns, chips and the like from being generated at the cut end.
Further, in the cutting device of the present invention, one end of the long brittle member is folded while being pressed onto the second surface plate by a pressing member provided on the projecting member. I'm going to break it. As a result, it is possible to prevent the short brittle member, which is cut off from the long brittle member and falls off, from falling onto the second surface plate in an excessively inclined state.

As the effect of the present invention, the following effects are exhibited.
That is, according to the method for cutting a long brittle member, the short brittle member, and the cutting device for a long brittle member according to the present invention, the long brittle member is prevented from generating horns, chips, etc. at the cut end. The short brittle member obtained by cutting can be recovered while preventing fatal defects such as chips, cracks, and cracks from occurring at the end.

The schematic side view which showed the overall structure of the cutting apparatus of the long brittle member which concerns on one Embodiment of this invention. In the cutting apparatus of this embodiment, it is the figure which showed the state at the time of cutting the tube glass with time, and (a) is the schematic side view which showed the state immediately after the anvil was raised to a predetermined position, ( b) is a schematic side view showing the state immediately after the scribing wire is engraved on the tube glass by the super hard cutter, and (c) is a schematic showing the state immediately after the tube glass is broken and cut by the contact portion. A side view, (d) is a schematic side view showing a state immediately after the tip of the cut short tube glass is placed on the receiving jig. It is a figure which showed the state at the time of cutting the tube glass in the conventional cutting apparatus with time, and (a) shows the state immediately after the scribing line was engraved on the tube glass by the carbide cutter. Schematic side view, (b) is a schematic side view showing a state immediately after the tube glass is cut by the contact portion. A partially enlarged cross-sectional view showing an example of a tube glass immediately after cutting in which horns and chips are generated.

Next, the configuration of the cutting device 1 for long brittle members (hereinafter, simply referred to as “cutting device 1”) that embodies the present invention will be described with reference to FIGS. 1 to 4.
In the following description, for convenience, the vertical direction of FIGS. 1 to 3 is defined as the vertical direction of the cutting device 1 or the conventional cutting device 101.
Further, in FIGS. 1 to 3, the direction of the arrow A is defined as the feeding direction of the tube glass G.

[Cutting device 1]
First, the overall configuration of the cutting device 1 in the present embodiment will be described with reference to FIGS. 1 and 3.
As shown in FIG. 1, the cutting device 1 is a device that simultaneously cuts a plurality of long tube glasses GG ..., Which is an example of a long brittle member, to a predetermined length.

The long brittle member cut by the cutting device 1 is not limited to the tube glass G of the present embodiment, and may be, for example, a tubular member or a rod-shaped member made of ceramics or the like.

Further, the tube glass G of the present embodiment has, for example, a diameter of 2 to 3 mm and is continuously cut at a predetermined length of 7.7 mm. However, the external dimensions of the tube glass G and the predetermined size at the time of cutting The length is not limited to this.
However, in the case of continuously cutting a tube glass having an outer diameter of 5 mm or less with a predetermined length of 20 mm or less, the cutting device 1 in the present embodiment more clearly exerts the effect of the invention.

The cutting device 1 is mainly composed of a holding portion 10, a receiving portion 20, a contact portion 30, a push-up portion 40, an engraving portion 50, and the like.
The holding portion 10 holds a plurality of tube glasses GG ... At a predetermined position at the same time.
The holding portion 10 is composed of a surface plate 11 and a pressing jig 12.

A plurality of tube glasses GG ... Are placed on the surface plate 11 with one end protruding to the outside.
The surface plate 11 is configured to have a horizontal upper surface 11a.

Then, on the upper surface 11a, a plurality of groove portions 11a1, 11a1 ... Consisting of, for example, a "U" -shaped or "V" -shaped cross section (only one is described because FIG. 1 is a side view) are pipes. The glass G is extended in the feeding direction (direction of arrow A in FIG. 1) and is formed parallel to each other in the horizontal width direction of the constant plate 11 (direction orthogonal to the feeding direction in a plan view). ..

The presser jig 12 sandwiches a plurality of tube glasses GG ... in the vertical direction together with the surface plate 11, so that these tube glasses GG ... Are placed on the surface plate 11. Press and hold.
The presser jig 12 is configured to have a horizontal lower surface 12a, and its width direction (arrangement direction of a plurality of groove portions 11a1, 11a1, ... In the surface plate 11) is a surface plate. It is set to be substantially the same as the dimension in the horizontal width direction of 11.
Further, the pressing jig 12 is arranged so as to be movable up and down by an actuator (not shown) directly above the surface plate 11.

Then, in the holding portion 10 having such a configuration, the plurality of tube glasses GG ... Are fitted into the groove portions 11a1, 11a1 ... Of the surface plate 11 and their positions are regulated. , It is pressed from above by the pressing jig 12 that has descended, and the mounting posture on the surface plate 11 is collectively held.

On the lower surface 12a of the presser jig 12, a plurality of groove portions having a "U" -shaped or "V" -shaped cross section are made to face the plurality of groove portions 11a1, 11a1, ... Of the surface plate 11. In this case, a plurality of tube glasses GG ... Are sandwiched between the plurality of groove portions and the plurality of groove portions 11a1, 11a1 ... Of the surface plate 11. If this is the case, the position regulation of the plurality of tube glasses GG ... Can be performed more reliably.

Next, the receiving portion 20 will be described.
The receiving portion 20 is an example of a short brittle member obtained by cutting, and a plurality of short tube glasses GG ... (hereinafter, appropriately referred to as "short tube glass Ga". FIG. 2D). (See) are received at the same time and collected together.

The receiving portion 20 is formed by a second surface plate 21, a step member 22, a pop-out prevention plate 23, and the like, which are sequentially arranged in the feeding direction on the downstream side (direction side of the arrow A) of the holding portion 10. It is composed.

The second surface plate 21 supports the short tube glasses Ga, Ga ... Immediately after cutting in a predetermined posture when collectively receiving and collecting the plurality of short tube glasses Ga, Ga ... It is a thing.
The second surface plate 21 is configured to have a horizontal upper surface plate 21a, and the widthwise dimension thereof is set to be substantially the same as the widthwise dimension of the constant platen 11, and the height of the upper surface plate 21a is set. Is set lower than the height of the upper surface 11a of the surface plate 11.

Then, on the upper surface 21a of the second surface plate 21, for example, a plurality of "U" -shaped or "V" -shaped grooves 21a1 and 21a1 in a cross-sectional view (only one is described because FIG. 1 is a side view). ... Is extended along the plurality of tube glasses GG ... Held by the pressing jig 12, and the plurality of groove portions 11a1, 11a1 ... Of the surface plate 11 in a plan view.・ It is formed so as to be located on the extension line of each.

The second surface plate 21 having such a configuration receives the falling short tube glass Ga, Ga ... Immediately after cutting, and at the same time, regulates the position through the groove portions 21a1, 21a1, ... Before cutting. The aligned state of the plurality of tube glasses GG ... Regulated by the groove portions 11a1, 11a1 ... Of the surface plate 11 in the above surface plate 11 is arranged with respect to the plurality of short tube glasses Ga, Ga ... Can be maintained.

The dimension in the feeding direction of the second surface plate 21, that is, the total length of each groove 21a1 formed on the upper surface 21a (dimension La in FIG. 1) is the total length of the short tube glass Ga (dimension Lb in FIG. 1). On the other hand, it is preferable that the value is 50% or more (La ≧ Lb × 0.5).
By having such a configuration, when the short tube glass Ga that falls immediately after cutting is received by the second surface plate 21, the short tube glass Ga does not wobble and fall off from the second surface plate 21. The short tube glass Ga is stably held by the second surface plate 21 via the groove portion 21a1.

In the step member 22, when a plurality of tube glasses G, G ... Are simultaneously folded and cut, the tip end portion (the end portion on the opposite side of the cut end portion) of each short tube glass Ga immediately after cutting is the first. The purpose is to provide a step on the second surface plate 21 in order to avoid collision with the second surface plate 21.
The step member 22 is made of, for example, a rectangular parallelepiped-shaped member, and is arranged in close contact with the second surface plate 21 on the downstream side in the feeding direction of the second surface plate 21.

Further, the height of the upper surface 22a of the step member 22 is set lower than the height of the upper surface 21a of the second surface plate 21, and the dimension of the step member 22 in the feeding direction is the dimension of the tube glass G immediately before cutting. The position of the tip portion (that is, corresponding to the tip portion of the short tube glass Ga) is set so as to be located immediately above the midway portion of the step member 22 in the feeding direction.

Then, the step member 22 in the present embodiment collides with the tip portion of the short tube glass Ga immediately after cutting, which falls on the second surface plate 21 with the tip portion tilted downward. The configuration is such that it can be sufficiently avoided.

As described above, on the upper surface 21a of the second surface plate 21, a step having a height lower than that of the second surface plate 21 is formed in the area opposite to the holding jig 12 side (that is, the anvil 41 side described later). By providing the member 22, it is possible to prevent the cut short tube glass Ga from being struck against the second surface plate 21 in an oblique posture and causing fatal defects such as chips, cracks, and cracks at the tip portion. Can be done.

That is, as shown in FIG. 3A, in the conventional cutting device 101, for example, the upper surface 121a of the second surface plate 121 constituting the receiving portion 120 is formed on the same plane without a step. Has been done.
Therefore, as shown in FIG. 3 (b), when a plurality of tube glasses GG ... Are simultaneously folded and cut, the tip of each short tube glass Ga immediately after cutting is the second surface plate 121. Collision with the upper surface 121a of the glass may cause fatal defects such as chips, cracks, and cracks.
On the other hand, as shown in FIG. 1, by providing the step member 22 in the present embodiment, it is possible to prevent the occurrence of such a fatal defect.

In the pop-out prevention plate 23, when a plurality of tube glasses G, G ... Are simultaneously folded and cut, each of the short tube glasses Ga, Ga ... Cut by the reaction is cut by the cutting device 1. This is to prevent it from jumping out.
The pop-out prevention plate 23 is made of, for example, a rectangular plate-shaped member made of resin or the like, and when the cut short tube glass Ga collides with the cut short tube glass Ga, a fatal defect such as a chip, a crack, or a crack occurs in the short tube glass Ga. It is designed to prevent it from occurring.

The dimension of the pop-out prevention plate 23 in the long side direction is set to be substantially the same as the dimension in the width direction of the second surface plate 21. Further, the dimension of the pop-out prevention plate 23 in the short side direction is set to be larger than the dimension in the height direction of the second surface plate 21.

Then, the pop-out prevention plate 23 is detachably fixed to the step member 22 on the downstream side of the step member 22 in the feeding direction, with the thickness direction as the feeding direction and the long side direction as the lateral width direction of the second surface plate 21. Will be set up.
That is, the pop-out prevention plate 23 is provided on the second surface plate 21 on the opposite side to the holding jig 12 side (that is, the anvil 41 side described later).

In this state, the height of the upper end 23a of the pop-out prevention plate 23 is set higher than the height of the upper surface 21a of the second surface plate 21, and the short tube glass Ga that bounces due to the reaction at the time of folding and cutting. However, the structure is such that it can be prevented from jumping over the second surface plate 21 and falling off to the outside of the cutting device 1.

Next, the contact portion 30 will be described.
The abutting portion 30 abuts on these tube glasses G, G, and applies an external force when the plurality of tube glasses G, G, ... Are collectively folded and cut at the same time.
The contact portion 30 is composed of a base member 31, a projecting member 32, a holding member 33, and the like.

The base member 31 is the base of the contact portion 30.
The base member 31 is made of, for example, a rectangular parallelepiped member, and is an actuator (not shown) immediately above the receiving portion 20 (more specifically, the step member 22), with the extending direction being the lateral width direction of the second surface plate 21. It is arranged so that it can be moved up and down.

Then, a protrusion member 32 and a holding member 33, which will be described later, are fixed to the lower surface 31a of the base member 31 and the side surface 31b on the holding portion 10 side (that is, the upstream side in the feeding direction), respectively.

The projecting member 32 is in direct contact with these tube glasses GG ... when a plurality of tube glasses GG ... Are collectively folded and cut at the same time.
The projecting member 32 is made of a rectangular rod-shaped member made of, for example, resin, and when the tube glass G is split and cut, chips, cracks, and cracks occur at a portion of the tube glass G that comes into contact with the projecting member 32. It is configured to prevent the occurrence of fatal defects such as.

The dimensions of the projecting member 32 in the long side direction (extending direction) are set to be substantially the same as the dimensions in the lateral width direction of the second surface plate 21.

Then, the projecting member 32 is directly above the receiving portion 20 (more specifically, the step member 22), the extending direction is the lateral width direction of the second surface plate 21, and the lower surface 31a of the base member 31 (the present embodiment). Is detachably fixed to the lower end 31a on the upstream side in the feeding direction).
As a result, the projecting member 32 descends as the base member 31 is lowered by the actuator (not shown), and simultaneously with respect to the tip portions of the plurality of tube glasses GG ... held by the holding portion 10. They will come into contact with each other.

When the holding member 33 collectively folds and cuts a plurality of tube glasses G, G ..., the second short tube glass Ga, Ga ... Cut is in a state of being excessively inclined. In order to prevent the glass from falling onto the surface plate 21, these short tube glasses Ga, Ga ... Are pressed (pressed) onto the second surface plate 21.
The pressing member 33 is made of an elastic material such as natural rubber or chloroprene rubber, and when pressing a plurality of short tube glasses Ga, Ga, etc., it deforms by itself, so that these short tube glasses Ga, Ga. It is configured to prevent excessive pressing force from being applied to Ga.

Further, the holding member 33 is composed of a substantially rectangular plate-shaped member that is bent and formed in a "he" shape in the extension direction, and the dimension in the long side direction (extension direction) is the second surface plate 21. It is set to be approximately the same as the width direction of.

Then, the pressing member 33 is directly above the receiving portion 20 (more specifically, the second surface plate 21), the thickness direction is the feeding direction, and the extension direction is the width direction of the second surface plate 21. The base member 31 is detachably fixed to the side surface 31b on the upstream side (holding portion 10 side) of the base member 31, that is, the pressing jig 12 side (that is, the anvil 41 side described later) of the projecting member 32.

Further, the holding member 33 is arranged so that the lower side end portion of the virtual vertical surface S is an inclined portion 33a that is inclined toward the upstream portion in the feeding direction by an angle θ.
That is, the pressing member 33 is configured to have an inclined portion 33a that extends downward and is inclined toward the pressing jig 12 side (that is, the anvil 41 side described later) with respect to the virtual vertical surface S. To.

By having such a configuration, even if the short tube glass Ga when it is split and cut tries to incline the tip end portion downward on the downstream side in the feeding direction due to the reaction, the inclined portion of the holding member 33 It is pushed back to the upstream side in the feeding direction via 33a, that is, to the upper surface 21a of the second surface plate 21, and the short tube glass Ga is stably held in a horizontal posture through the groove portion 21a1. It will be.

The inclination angle θ formed by the above-mentioned virtual vertical surface S and the inclined portion 33a is preferably set within a range of 0 ° or more and less than 90 °.
By setting the inclination angle θ within such a range, the inclined portion 33a of the pressing member 33 appropriately deforms its own shape as the folding operation with respect to the short tube glass Ga progresses, and always appropriately presses. Pressure can be applied to the short tube glass Ga.

Next, the push-up portion 40 will be described.
The push-up portion 40 supports the tube glasses G, G ... At the cut portion when the plurality of tube glasses G, G ... Are collectively folded at the same time.
The push-up portion 40 is composed of, for example, an anvil 41 made of a rectangular plate-shaped member or the like.

The anvil 41 supports a plurality of tube glasses GG held by the pressing jig 12 in a state where the middle portion (cut portion) of one end portion protruding to the outside is pushed upward. Is what you do.
The dimension in the long side direction of the anvil 41 is set to be substantially the same as the dimension in the width direction of the surface plate 11.
Further, one long side end portion 41a of the anvil 41 is formed in a wedge shape in the extension direction view.

The anvil 41 has a long side between the first surface plate 11 of the holding portion 10 and the second surface plate 21 of the receiving portion 20 and directly below the engraving portion 50 described later, with the thickness direction as the feeding direction. The direction is the width direction of the surface plate 11, and the surface plate 11 is arranged with the long side end portion 41a facing upward.

Further, the anvil 41 is arranged so as to be movable up and down by an actuator (not shown).
With the anvil 41 having such a configuration, the plurality of tube glasses GG ... Have the scribing lines (scribed lines) engraved in a range of 20 μm or more and 30 μm or less upward. , At the same time, they are pushed up together.
As a result, it is possible to prevent each of the cut end faces of the small one-sided tube glasses Ga, Ga ... After cutting from being formed in an arbitrary slope shape, and a smooth vertical cut end face can be stably obtained. It becomes possible.

Next, the engraving unit 50 will be described.
The engraving unit 50 engraves scribing lines (scribed lines) together on a plurality of tube glasses GG ... held by the holding unit 10.
The engraving portion 50 is composed of, for example, a disk-shaped carbide cutter 51 or the like.

The carbide cutter 51 is arranged between the first surface plate 11 of the holding portion 10 and the second surface plate 21 of the receiving portion 20 and directly above the above-mentioned anvil 41 with the axial direction as the feeding direction.
Further, the cemented carbide cutter 51 is provided with a driving means (not shown), and the cemented carbide cutter 51 is rotationally driven around the axis by the driving means.
Further, the cemented carbide cutter 51 is provided with a moving means (not shown), and the cemented carbide cutter 51 is moved in the vertical direction and the lateral width direction of the surface plate 11.

Then, the cemented carbide cutter 51 descends once while performing rotational drive, and then moves in the lateral width direction.
As a result, the plurality of tube glasses GG ... Are engraved with scribing lines (ruled lines) in a straight line at predetermined cutting points.

In the cutting device 1 having the above configuration, from the cutting portion of the tube glass G, that is, the location where the tube glass G is supported by the anvil 41 of the push-up portion 40 (hereinafter, referred to as “fulcrum portion B”). The holding portion 10 is pressed down from the separation distance Xa to the portion where the tube glass G is abutted by the projecting member 32 of the abutting portion 30 (hereinafter, referred to as "power point portion C") and the fulcrum portion B. The separation distance Xb to the position where the tube glass G is held by the tool 12 (hereinafter, referred to as “point of action D”) is set to be evenly spaced (Xa = Xb).
By having such a configuration, a substantially equal external force is applied to the tube glass G at the time of split cutting at the force point portion C and the action point portion D.
As a result, for example, in the tube glass G immediately after being split and cut as shown in FIG. 4, Tsuno Ga1 or the like is generated at the cut end of the short tube glass Ga, or the short tube glass Ga is cut off. A smooth cut end face can be stably obtained without the occurrence of chips G1 or the like at the cut end of the tube glass G after the glass G.

Then, at one end of the plurality of tube glasses GG ... Supported by the anvil 41, a scribing line is engraved by the carbide cutter 51 at the upper portion opposite to the lower portion in contact with the anvil 41. After being installed, the projecting member 32 abuts downward on the tip of the tube glass GG ... On the opposite side of the holding jig 12 side, thereby causing the said. One end of the tube glass GG ... Is cut by folding.

[Procedure of cutting method]
Next, a method of cutting a long brittle member carried out by the cutting device 1 will be described with reference to FIGS. 1 and 2 based on the operation procedure of the cutting device 1.
First of all, in the holding portion 10, the pressing jig 12 is in a state of being stopped at a predetermined "upper standby position" and is separated from the surface plate 11 in the vertical direction.
Further, in the contact portion 30, the base member 31 is in a state of being stopped at a predetermined "upper standby position" together with the projecting member 32 and the pressing member 33, and the second surface plate 21 of the receiving portion 20 and It is separated from the step member 22 in the vertical direction.
Further, in the push-up portion 40, the anvil 41 is in a state of being stopped at a predetermined "lower standby position", and is located below the upper surface 11a of the surface plate 11.
Further, in the engraving portion 50, the carbide cutter 51 is in a state of being stopped at a predetermined "upper standby position" and a "return limit position" on one side in the lateral width direction of the surface plate 11. It is separated from the surface plate 11 in the vertical direction and in the horizontal width direction.

In the cutting device 1 having such a state, a plurality of tube glasses GG ... Are fed and carried in by a feeding device or the like (not shown), and are predetermined through a plurality of groove portions 11a1, 11a1 ... It is placed on the upper surface 11a of the surface plate 11 while being regulated in an aligned state.
At this time, these tube glasses GG ... Are placed in a state of protruding from the surface plate 11 toward the downstream side in the feeding direction by a predetermined length.

Then, as shown in FIG. 1, when a plurality of tube glasses GG ... Are placed on the surface plate 11, the holding jig 12 is lowered, and these tube glasses GG ... Is pressed at a predetermined pressure.
As a result, the plurality of tube glasses GG ... Are sandwiched between the surface plate 11 and the holding jig 12, and the placement posture on the surface plate 11 is firmly maintained.
That is, the plurality of tube glasses GG ... Are placed on the surface plate 11 with one end projecting outward, and are pressed and held by the pressing jig 12 (holding). Process).

When the plurality of tube glasses GG ... Are pressed by the pressing jig 12, the anvil 41 rises to a predetermined "upper limit stop position" as shown in FIG. 2A.
As a result, the plurality of tube glasses GG ... Are supported in a state of being projected upward by the anvil 41 at the middle portion (cut portion) in the feeding direction.
That is, the plurality of tube glasses GG ... held by the holding step are supported in a state of being pushed up by the anvil 41 at the middle portion of one end portion protruding to the outside (supporting step).

When the plurality of tube glasses GG ... Are supported by the anvil 41, the cemented carbide cutter 51 starts rotational driving about the axis as shown in FIG. 2 (b).

The cemented carbide cutter 51 that has started the rotational drive descends to a predetermined "lower limit stop position" and then moves to the "limit position" on the other side in the lateral width direction of the surface plate 11.
As a result, the plurality of tube glasses GG ... Are pressed against the carbide cutter 51 in order on the upper side of the middle portion (cutting point) in the feeding direction, and the scribing lines (ruled lines) LL ... Each is engraved.
That is, one end of the plurality of tube glasses GG supported by the support step protruding to the outside is a scribing line (lined line) at an upper portion opposite to the lower portion in contact with the anvil 41. ) L, L ... Is engraved (engraving process).

Then, the carbide cutter 51 that has reached the "limit position" stops the rotational drive, rises to a predetermined "upper standby position", and then moves to the "return position" again.

On the other hand, when scribing lines (ruled lines) are engraved on a plurality of tube glasses GG ... by the cemented carbide cutter 51, as shown in FIG. 2C, the base member 31 is a projecting member. Together with 32 and the holding member 33, it descends to a predetermined "lower limit stop position".
As a result, the plurality of tube glasses GG ... are brought into contact with the projecting member 32 at the tip end portion on the downstream side in the feeding direction, and are cut by folding downward with the anvil 41 as a fulcrum.
Further, as the folding cutting by the projecting member 32 progresses, the plurality of tube glasses GG ... By the pressing member 33, the tip portion on the downstream side in the feeding direction and above the second surface plate 21 are moved. , It is gradually and strongly pressed downward.

Then, as shown in FIG. 2D, when the base member 31 reaches the "lower limit stop position", the folding cutting of the plurality of tube glasses GG ... is completed, and the plurality of tubes Glass Ga, Ga ... Is formed.

In this way, the plurality of tube glasses GG ... On which the scribing lines (ruled lines) L, L ... Are engraved by the engraving process are held at one end projecting to the outside. When the projecting member 32 abuts downward at the tip on the opposite side to the 12 side, the projecting member 32 is split and cut (cutting step).

After that, the formed plurality of short tube glasses Ga, Ga ... Are pressed onto the second surface plate 21 by the pressing member 33, and are brought into a predetermined aligned state through the plurality of groove portions 21a1, 21a1, ... It is maintained while being regulated.
That is, the plurality of tube glasses G / G ... (more specifically, the small piece side tube glass Ga / Ga ...) Cut by the cutting step are received on the second surface plate 21. Is collected (collection process).

When the folding and cutting of the plurality of tube glasses GG are completed, the anvil 41 descends to the "lower standby position" again.
Further, the base member 31 rises to the "upper standby position" again together with the projecting member 32 and the holding member 33, and then the plurality of short tube glasses Ga, Ga ... Formed are combined with the cutting device 1. It is carried out of the aircraft.

Then, when the plurality of short tube glasses Ga, Ga ... Are carried out, the holding jig 12 rises again, reaches the "upper standby position", and stops.
As a result, the operation procedure by the cutting device 1 is completed for the time being.

After that, when further cutting the plurality of tube glasses GG ... Is performed, the plurality of tube glasses GG ... Are fed again by a feeding device (not shown) for a predetermined distance, and then described above. The holding process, the supporting process, the engraving process, the cutting process, and the collecting process are repeated.

1 Cutting device 11 First surface plate (first surface plate)
12 Presser jig 21 Second surface plate (second surface plate)
21a1 Groove 22 Step member (step)
23 Pop-out prevention plate 32 Protruding member 41 Anvil B Support point C Power point D Action point G Tube glass (long brittle member)
Ga Short tube glass L scribe line (lined line)
33 Holding member 33a Inclined part

Claims (7)

A holding step in which the long brittle member is placed on the first surface plate with one end protruding outward, and the long brittle member is pressed and held by a holding jig.
A support step of supporting an intermediate portion of one end of the long brittle member held by the holding step in a state of being pushed up by an anvil.
An engraving step of engraving a scribe line at one end of the long brittle member supported by the support step at an upper portion on the opposite side of the lower portion in contact with the anvil.
At one end of the long brittle member on which a scribe wire is engraved by the engraving step, the projecting member is brought into contact downward at the tip on the opposite side to the holding jig side. A cutting step of splitting and cutting one end of the long brittle member, and
A recovery step of receiving and recovering a short brittle member obtained by cutting by the cutting step on a second surface plate,
A method for cutting a long brittle member.
In the cutting step
The distance from the fulcrum point supported by the anvil to the force point point abutted by the projecting member on the long brittle member, and from the fulcrum point point to the action point point held by the holding jig. The separation distance is set to equal intervals, and
While pressing one end of the long brittle member onto the second surface plate by a pressing member provided on the anvil side of the projecting member, one end of the long brittle member is broken.
A method for cutting a long brittle member. In the second surface plate,
On the side opposite to the anvil side, a pop-out prevention plate having a height higher than that of the second surface plate is provided.
The method for cutting a long brittle member according to claim 1. On the upper surface of the second surface plate,
A step portion having a height lower than that of the second surface plate is provided in the area opposite to the anvil side.
The method for cutting a long brittle member according to claim 1 or 2, wherein the long brittle member is characterized in that. On the upper surface of the second surface plate,
It has a U-shaped or V-shaped groove in cross section extending along a long brittle member held by the holding jig.
The total length of the groove is 50% or more of the total length of one end of the short brittle member obtained by cutting.
The method for cutting a long brittle member according to any one of claims 1 to 3, wherein the method is characterized by the above. The projecting member is made of resin and
The holding member is formed of an elastic member.
The method for cutting a long brittle member according to any one of claims 1 to 4, wherein the method is characterized by that. The holding member is
It has an inclined portion that extends downward and is inclined toward the anvil side with respect to the virtual vertical surface, and also has an inclined portion.
The inclination angle formed by the virtual vertical surface and the inclined portion is 0 ° or more and less than 90 °.
The method for cutting a long brittle member according to any one of claims 1 to 5, wherein the method is characterized by that. The first surface plate on which a long brittle member is placed with one end protruding outward,
A holding jig that presses and holds the long brittle member on the first surface plate, and
Anvil that supports the middle part of one end of the long brittle member held by the holding jig in a raised state, and
At one end of the long brittle member supported by the anvil, after engraving a scribe line at an upper portion opposite to the lower portion in contact with the anvil, at one end of the long brittle member, A protruding member that abuts downwardly against the tip on the opposite side of the holding jig side and splits and cuts one end of the long brittle member.
A second surface plate that receives and collects the short brittle member obtained by cutting by the projecting member, and
It is a cutting device for a long brittle member provided with
The distance from the fulcrum point supported by the anvil to the force point point abutted by the projecting member on the long brittle member, and from the fulcrum point point to the action point point held by the holding jig. The separation distance is set to equal intervals, and
A pressing member provided on the anvil side of the projecting member and pressing one end of the long brittle member onto the second surface plate when the long brittle member is broken.
A device for cutting long brittle members.

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