KR101383148B1 - Laminated and supply apparatus of timber - Google Patents

Abstract

The present invention relates to a material stacking and feeding apparatus, and more particularly, to a material stacking and feeding apparatus for smoothly supplying a material located at the top to another processing apparatus by moving upward in a state of stacking materials.
Material stacking and supplying apparatus of the present invention, the guide bar for supporting the side of the material is mounted on the base plate in a plurality of upwards; A through hole through which the guide bar penetrates is formed, and is disposed on an upper portion of the base plate so that material is formed on an upper surface thereof. Up and down A support plate laminated; A lifting member for moving the support plate in a vertical direction; Consisting of the support plate Ascending by the elevating member is characterized in that the material laminated on the upper surface is supported while being supported by the guide bar.

Description

Material Lamination and Feeding Equipment {LAMINATED AND SUPPLY APPARATUS OF TIMBER}

The present invention relates to a material stacking and feeding apparatus, and more particularly, to a material stacking and feeding apparatus for smoothly supplying a material located at the top to another processing apparatus by moving upward in a state of stacking materials.

In general, the material is made of a rod shape, using the material itself or by attaching the material to the plate.

In particular, panels were made by bonding materials to plate materials such as MDF and PB, and these panels were processed to produce various products such as furniture.

As described above, when manufacturing a panel by attaching a material to a plate, a supply device for supplying a material is used after stacking the material to supply the material to the plate.

As a device for supplying materials by laminating materials in this manner, Korean Patent Laid-Open Publication No. 2003-0031695 has been published.

The material stacking and feeding device controls the rotational force of the eccentric cylinder of the lumber clamping device to drop the material down one by one, pushing the material across the lumber locking jaw and the second and third base rollers in the longitudinal direction of the material by the lumber push device. The subject then supplied the material to the next level.

However, since the material stacking and feeding device drops the material down and then pushes the material in the longitudinal direction of the material to supply the material to the next stage, the material is pushed in the longitudinal direction of the material so that the position of the supplied material becomes uneven. There is a problem that can not be supplied to the next step to match the shape of the dog material to the same shape.

The present invention is to solve the above-mentioned problems, in particular, after stacking a plurality of materials in a uniform shape on the upper surface of the support plate, the lifting material is supported by the guide bar so as not to be disturbed by the elevating member to be raised of the laminated material It is an object of the present invention to provide a material stacking and feeding device capable of supplying a material located at the top to a material conveying unit in its shape.

In order to achieve the above object, the material stacking and supplying apparatus of the present invention includes: a guide bar supporting a side of a material mounted on the base plate in a plurality of upwards; A through hole through which the guide bar penetrates is formed, and is disposed on an upper portion of the base plate so that material is formed on an upper surface thereof. Up and down A support plate laminated; A lifting member for moving the support plate in a vertical direction; Consisting of the support plate Ascending by the elevating member is characterized in that the material laminated on the upper surface is supported while being supported by the guide bar.

A material supply unit disposed at an upper portion of the material transfer unit for transferring materials; A conveying rail part which horizontally conveys the first carrier comprising the base plate, the guide bar and the support plate and inserts the material into the material supplying part; It further comprises, wherein the lifting member is mounted on both left and right sides of the material supply unit in the vertical direction of the front and rear direction in which the first carrier is transported, the lifting member is the first carrier of the first carrier inserted into the material supply unit; Raising the support plate is characterized in that for supplying the material laminated on the upper surface to the material transfer unit.

A second carrier comprising the base plate, the guide bar and the support plate; It further comprises, wherein the conveying rail portion is disposed in the front and rear direction of the material supply portion, the first carrier and the second carrier is disposed in the front and rear direction of the material supply portion, respectively, in the upper portion of the conveying rail portion, The first carrier and the second carrier is characterized in that the transfer is inserted in the material supply unit along the transfer rail portion.

The elevating member is characterized in that as the material laminated on the upper surface of the support plate is conveyed by the material transfer unit to raise the support plate by the thickness of the conveyed material.

The elevating member includes a plurality of lead screws disposed on both sides of the support plate and rotatably mounted in an up and down direction; A motor for rotating the lead screw; A support part mounted on the lead screw and supporting both lower sides of the support plate while moving up and down by the lead screw rotated by the motor; Wherein, the width of the support plate is formed larger than the width of the base plate, the shortest distance between the support portion disposed on both sides of the support plate is shorter than the width of the support plate, longer than the width of the base plate It features.

The material includes a first material having a rod shape; A second material formed in a rod shape and spaced apart from and parallel to the first material; A third material disposed vertically between the first material and the second material to connect the first material and the second material; The guide bar comprises: a first guide bar disposed in an opposite direction of the third material with respect to the first material to prevent the first material from moving in the opposite direction of the third material; A second guide bar disposed in an opposite direction of the third material with respect to the second material to prevent the second material from moving in the opposite direction of the third material; Third guide bars disposed on left and right sides of the third material to prevent the third material from moving in both left and right directions; Wherein, the base plate has a coupling hole is formed, the coupling hole is characterized in that the first guide bar, the second guide bar and the third guide bar are detachable.

According to the material stacking and supplying apparatus of the present invention as described above has the following effects.

The support plate is raised by the elevating member to be raised while supporting the material laminated on the upper surface to the guide bar to stably supply the material to the top.

By further comprising the conveying rail portion and the material supply portion, after stacking the material on the first carrier from the outside of the material supply portion, since the first carrier is inserted into the material supply portion along the conveying rail portion material There is an effect that can be easily laminated outside the material supply unit.

The first carrier and the second carrier are inserted into the material supply part by crossing the material supply part along the conveying rail part so that the first carrier is inserted into the material supply part and supplies the stacked material to the material conveying part while the second carrier is supplied. The carrier stacks materials, and after the material of the first carrier is supplied to the material conveying unit, the second carrier is inserted into the material supplying unit and supplies the material to the material conveying unit.

As the elevating member raises the support plate by the thickness of the material conveyed by the material conveying unit, the uppermost material stacked on the upper surface of the support plate is always positioned at a constant position, whereby the material conveying unit removes the material. There is an effect that can be supplied at a certain position.

The width of the support plate is formed larger than the width of the base plate, disposed on both sides of the support plate The shortest distance between the support parts is shorter than the width of the support plate and longer than the width of the base plate, thereby supporting both lower parts of the support plate while the support part moves up and down along the lead screw rotated by the rotation of the motor. There is an effect to move up and down.

The first material, the second material, and the first material forming the material by supporting the first material, the second material, and the third material by the first guide bar, the second guide bar, and the third guide bar. 3 The material cannot move laterally, so the material can be stably supplied.

In addition, a coupling hole is formed in the base plate, and the first guide bar, the second guide bar, and the third guide bar are detachably coupled to each other so that the width of the first material, the second material, and the third material is wide. The first guide bar, the second guide bar and the third guide bar can be variously coupled to the coupling hole of the base plate.

1 is a side view showing the structure of the material stacking and supplying apparatus of the present invention.
Figure 2 is a front view showing the structure of the material stacking and supply apparatus of the present invention.
Figure 3 is a plan view showing the structure of the material stacking and supplying apparatus of the present invention.
Figure 4 is a plan view showing the material laminated on the support plate of the material stacking and supply apparatus of the present invention
Figure 5 is a perspective view showing a structure in which a carrier is inserted into the material supply portion of the material stacking and supplying apparatus of the present invention.
Figure 6 is an example of use showing the appearance of the carrier is inserted into the material supply portion of the material stacking and supplying apparatus of the present invention to raise the material.

1 is a side view showing the structure of the material stacking and supplying apparatus of the present invention, Figure 2 is a front view showing the structure of the material stacking and supplying apparatus of the present invention, Figure 3 is a structure of the material stacking and supplying apparatus of the present invention 4 is a plan view showing materials stacked on a support plate of the material stacking and supplying apparatus of the present invention, and FIG. 5 is a structure in which a carrier is inserted into the material supplying portion of the material stacking and feeding apparatus of the present invention. Figure 6 is a perspective view, Figure 6 is a use example showing a state in which the carrier is inserted into the material supply portion of the material stacking and supplying apparatus of the present invention to raise the material.

As shown in Figures 1 to 6, the material stacking and supplying apparatus of the present invention, the base plate 100, guide bar 200, support plate 300, elevating member 400, material supply unit 500 And a conveying rail part 600.

The base plate 100 is formed in a flat plate shape as shown in FIG.

As shown in FIG. 1, the base plate 100 is disposed above the transfer rail part 600 to be described later and horizontally moves in the front-rear direction.

In addition, a plurality of coupling holes 110 are formed on an upper surface of the base plate 100 as shown in FIG. 5.

The coupling hole 110 is detachably attached to the guide bar 200 to be described later.

The guide bar 200 is formed long in the shape of a rod.

The guide bar 200 is mounted to the base plate 100 a plurality in the upward direction.

More specifically, as shown in FIGS. 5 to 6, the lower portion of the guide bar 200 is coupled to the coupling hole 110 formed in the base plate 100 in a detachable upward direction.

And the guide bar 200 supports the side of the material (P) laminated on the upper surface of the support plate 300.

A plurality of the coupling holes 110 for detachably attaching the guide bar 200 to the base plate 100 in an upward direction are formed with respect to one guide bar 200 as illustrated in FIG. 5. The position of the guide bar 200 can be adjusted.

That is, by mounting the guide bar 200 in any one of the plurality of coupling holes 110 according to the thickness of the material (P), by adjusting the position of the guide bar 200 material (P) of various thickness To support it.

In addition, the guide bar 200 can be coupled to the coupling hole 110 according to the width of the material (P) to be laminated on the upper surface of the support plate 300 using a different diameter, as needed. do.

The shape of the cross-section of the guide bar 200 may be formed in various shapes such as a polygon, but when the polygon is formed in a polygon, the diameter of the guide bar 200 is not constant so that the position supported by the material P is not constant. It is preferable to form in a circular shape having a constant diameter as in the example.

The support plate 300 is formed in a flat plate shape as shown in Figures 1 to 6 is disposed on the base plate 100.

And the upper surface of the support plate 300, as shown in Figures 4 and 6 material (P) is stacked in the vertical direction.

The support plate 300 is moved in the vertical direction by the lifting member 400 as shown in Figure 1 or 5, 6.

The support plate 300 is formed with a plurality of through holes 310 as shown in FIG.

As shown in FIG. 5, the guide bar 200 mounted upward on the support plate 300 penetrates the through hole 310. As a result, the through hole 310 is shown in FIG. 6. The guide bar 200 penetrating 310 may support the side surface of the material P laminated on the upper surface of the support plate 300 when the support plate 300 is raised.

The lifting member 400 moves the support plate 300 in the vertical direction as shown in FIG. 1 or FIGS. 5 and 6.

The elevating member 400 is composed of a lead screw 410, a motor 420 and the support portion 430.

The lead screw 410 is disposed on both sides of the support plate 300, as shown in Figures 1 and 2, it is rotatably mounted in the vertical direction.

The lead screw 410 is disposed on both sides of the support plate 300.

This is to stably move up and down while the support part 430 moving up and down along the lead screw 410 is horizontal.

In this embodiment, two lead screws 410 are formed at one side.

The motor 420 rotates the plurality of lead screws 410 as shown in FIGS. 1, 2, 5, and 6.

Unlike the present embodiment, the motor 420 may be mounted so as to rotate the lead screw 410 each made of a plurality, so as to rotate the lead screw 410 made of a plurality as in this embodiment with the same rotational force. It is desirable to rotate with one motor 420.

As shown in FIGS. 1 and 2, the support part 430 is mounted to the lead screw 410 to support both lower sides of the support plate 300.

The support part 430 supports the lower part of the support plate 300 as shown in FIGS. 5 and 6 while moving up and down according to the lead screw 410 rotating by the rotation of the motor 420. By moving the support plate 300 in the vertical direction.

In this case, as shown in FIG. 2, the support part 430 supports the lower part of the support plate 300 to move upward and downward, so that the width D1 of the support plate 300 is the base plate. It is formed larger than the width (D2) of (100), the shortest distance (L1) between the support portion 430 disposed on both sides of the support plate 300 is less than the width (D1) of the support plate 300 It is short and formed longer than the width (D2) of the base plate (100).

As shown in FIG. 2, when the support part 430 is located below the support plate 300 and ascends, the shortest distance L1 between the support parts 430 is equal to that of the base plate 100. Since the support part 430 is formed to be larger than the width D2, the base plate 100 positioned below the support plate 300 does not contact with each other without being supported.

The shortest distance L1 between the support parts 430 is formed to be shorter than the width D1 of the support plate 300 positioned on the base plate 100, so that the support part 430 rises. The lower side of the support plate 300 is supported to transfer the support plate 300 in the vertical direction.

As shown in FIGS. 1 and 2, the material supply unit 500 inserts a first carrier C1 or a second carrier C2 into a material P stacked on an upper surface of the support plate 300. It is a part to supply to the sending part 510.

In the present invention, the first carrier C1 includes the base plate 100, the guide bar 200, and the support plate 300.

The material supply unit 500 is disposed above the material transfer unit 510 for transferring the material (P).

The material transfer unit 510 serves to supply the material P to another processing device by transferring the material P of the first carrier C1.

As illustrated in FIGS. 1 and 3, the transfer rail part 600 horizontally moves the first carrier C1 in the front-rear direction and inserts the material into the material supply part 500.

1 and 2, the transfer rail part 600 has a rail 601 disposed below the base plate 100, and the base plate 100 is disposed on the rail. The first carrier C1 is inserted into the material supply part 500 while being slid and moved along the support 601.

However, unlike the present embodiment, the first rail C1 may be transferred and inserted into the material supply unit 500 using various known techniques.

As shown in FIGS. 1 and 3, the transfer rail unit 600 is installed in the front-rear direction in which the first carrier C1 is inserted into the material supply unit 500.

The second carrier C2 has the same configuration as that of the first carrier C1, and the first carrier C1 and the second carrier C2 are made of the material as shown in FIGS. 1 and 3. Each of the supply units 500 is disposed in the front-rear direction.

The first carrier C1 and the second carrier C2 are alternately inserted into the material supply part 500 along the transfer rail part 600.

As a result, as shown in FIG. 1, when the first carrier C1 is inserted into the material supply part 500 to supply the material P to the material transfer part 510, the second carrier C2 may have the upper side. The support plate 300 may be laminated with the material (P).

After the material P of the first carrier C1 is supplied, the first carrier C1 is provided along the transfer rail part 600 in the opposite direction inserted into the material supply part 500. In step 500, the second carrier C2 is inserted into the material supply part 500 to supply the material P to the material transfer part 510.

As such, the first carrier C1 and the second carrier C2 are alternately inserted into the material supply unit 500 to be inserted into the material P, thereby supplying the material P to another processing apparatus. It can be supplied continuously without stopping.

Unlike the present embodiment, the material conveying unit 510 is disposed on the upper part of the first carrier C1 without the conveying rail part 600 for conveying the first carrier C1, and the first carrier C1 is disposed. The elevating member 400 may be installed on both left and right sides to supply the material P stacked in the vertical direction on the upper surface of the support plate 300 to the material transfer part 510.

However, when installing in this way, when stacking the material (P) on the support plate 300, the material (P) is caught on the transfer rail portion 600 disposed on the upper material (on the upper surface of the support plate 300) It becomes difficult to laminate P).

Therefore, after the transfer rail unit 600 is installed as in this embodiment, the material P is more easily laminated on the support plate 300 of the first carrier C1 and the second carrier C2. It is preferable to insert the material supply unit 500 so that the material transfer unit 510 supplies the material P to another processing apparatus.

In this case, as shown in FIGS. 2, 5 and 6, the elevating member 400 is mounted on both left and right sides of the material supply unit 500 in a vertical direction in the front and rear direction in which the first carrier C1 is transferred. .

The elevating member 400 is transported along the transfer rail 600 to insert the support plate 300 of the first carrier C1 or the second carrier C2 inserted into the material supply unit 500. Raise.

That is, the lifting member 400 is a material (P) laminated in the vertical direction on the support portion 430 of the first carrier (C1) or the second carrier (C2) inserted into the material supply unit 500 is As the material is transferred by the material transfer unit 510 and supplied to another processing apparatus, the remaining material P is raised to raise the material P to be positioned above the guide bar 200.

The lifting member 400 is preferably to raise the support plate 300 by the thickness of the material (P) transferred by the material transfer unit 510.

This is because when the elevating member 400 conveys the support plate 300 more or less than the thickness of the material P conveyed by the material conveying part 510, the material P of the uppermost layer stacked thereon Since the location is not constant, the material transfer unit 510 may not be smoothly supplied with the material (P).

Therefore, as shown in the present embodiment, the elevating member 400 raises the support plate 300 by the thickness of the material P transferred by the material transfer unit 510, thereby stacking the upper surface of the support plate 300. The material transfer unit 510 can smoothly receive the material P at a predetermined position by making the position of the material P of the uppermost one among the materials P become constant.

Meanwhile, as illustrated in FIG. 4, the guide bar 200 includes a first guide bar 210, a second guide bar 220, and a third guide bar 230.

The first guide bar 210, the second guide bar 220 and the third guide bar 230 supports the side of the material (P).

At this time, the material P is composed of a first material (P1), a second material (P2) and a third material (P3).

The first material P1 is formed to have a long rod shape.

The second material P2 is also elongated in the shape of a rod.

The second material P2 is spaced apart from the first material P1 and disposed in parallel.

The third material P3 is disposed in the vertical direction between the first material P1 and the second material P2 spaced apart and arranged in parallel to each other so that the first material P1 and the second material ( Connect P2).

The first guide bar 210, the second guide bar 220, and the third guide bar 230 support the material P formed as described above.

The first guide bar 210 is disposed in a direction opposite to the third material P3 with respect to the first material P1 so that the first material P1 is opposite to the third material P3. To prevent it from moving.

The second guide bar 220 is disposed in a direction opposite to the third material P3 based on the second material P2 so that the second material P2 is opposite to the third material P3. To prevent movement in the direction.

The third guide bar 230 is disposed on both left and right sides of the third material P3 to prevent the third material P3 from moving in both left and right directions.

In more detail, the third guide bar 230 is disposed on the left and right sides of the third material (P3) one by one pair to prevent the third material (P3) from moving in both the left and right directions.

At this time, the third guide bar 230 is preferably disposed two or more pairs to support both ends of the third material (P3) pair by pair.

As such, the first guide bar 210, the second guide bar 220, and the third guide bar 230 may be formed of the first material P1, the second material P2, and the third material ( By supporting P3), the material P may be laminated on the support plate 300 without flowing.

The operation process and use state of the material (P) lamination and the material supply device having such a configuration will be described in detail.

First, as shown in FIG. 4, the material P is laminated on the upper surface of the support plate 300 of the first carrier C1.

In this case, the first guide bar 210 is disposed in the opposite direction of the third material (P3) relative to the first material (P1) so that the first material (P1) of the third material (P3) Prevent movement in the opposite direction.

The second guide bar 220 is disposed in a direction opposite to the third material P3 based on the second material P2 so that the second material P2 is opposite to the third material P3. Prevent movement in the direction.

The third guide bar 230 is disposed on both left and right sides of the third material P3 to prevent the third material P3 from moving in both the left and right directions.

The third guide bar 230 is disposed on each of the left and right sides of the third material (P3) one by one pair to prevent the third material (P3) from moving in both the left and right directions.

As such, the first guide bar 210, the second guide bar 220, and the third guide bar 230 are continuously installed, and as shown in FIG. 4, the first material P1 and the first guide bar 210. The second material P2 and the third material P3 are arranged and stacked in a predetermined shape.

After stacking the material (P) on the support plate 300 as above, the first carrier (C1) is moved in the front and rear direction along the transfer rail portion 600 is inserted into the material supply unit 500.

When the first carrier C1 is inserted into the material supply unit 500, the material transfer unit 510 located at the top of the material supply unit 500 is stacked on the upper surface of the support plate 300. P) is supplied and transported.

At this time, the material transfer unit 510 is to hold the material (P) laminated in a predetermined shape as it is to be transferred to another processing device.

As such, the material transfer part 510 supplies the material P of the uppermost end of the material P stacked on the upper surface of the support plate 300 to another processing device, so that the elevating member 400 is supported on the support plate. The material transferred by the material transfer part 510 by raising the 300 to raise the material P of the top of the remaining materials P stacked on the support plate 300 by the thickness of the transferred material P. It will fill in the position of (P).

That is, the elevating member 400 raises the support plate 300 by the thickness of the material P transferred by the material transfer unit 510, and among the remaining materials P stacked on the support plate 300. The uppermost material P is raised to be positioned at the position of the material P transported by the material transfer unit 510.

Then, the material transfer unit 510 transfers the stacked material P again, and the elevating member 400 raises the support plate 300 by the transferred material P again.

In this process, when the material P is supplied to the material transfer unit 510 and the material P stacked on the support plate 300 of the first carrier C1 is exhausted, the first carrier C1 is exhausted. Is moved in the front and rear direction along the conveying rail unit 600, the second carrier (C2) located on the opposite side is inserted into the material supply unit 500 and the material in the same process as the first carrier (C1) ( P) will be supplied.

As described above, the first carrier C1 and the second carrier C2 cross each other and are inserted into the material supply unit 500 to supply the material P, thereby continuing the material P, and thereby continuing the material transfer unit 510. Can be supplied to.

Meanwhile, as illustrated in FIGS. 2 and 5, the support parts 430 of the elevating member 400 for raising the support plate 300 are disposed at both sides of the material supply part 500 to provide the first carrier ( When the C1 is inserted along the transfer rail part 600, the motor 420 rotates, and the support part 430 rises along the lead screw 410 that is rotated by the rotation of the motor 420. do.

In this case, the support part 430 supports the lower portion of the support plate 300 to be moved upward and downward by the rotation of the lead screw 410 while the material (P) laminated on the upper surface of the support plate 300 It supplies the material (P) to the material transfer unit 510 is located above the material supply unit 500.

The material stacking and supplying apparatus of the present invention is not limited to the above-described embodiments, and may be variously modified and implemented within the range in which the technical idea of the present invention is permitted.

100: base plate 110: coupling hole 200: guide bar
210: first guide bar 220: second guide bar 230: third guide bar
300: support plate 310: through hole 400: elevating member
410: lead screw 420: motor 430: support
500: material supply part 510: material transfer part 600: transfer rail part
601: rail
P: Material P1: First Material P2: Second Material
P3: 3rd material C1: 1st carrier C2: 2nd carrier

Claims (6)

A base plate;
A guide bar mounted on the base plate in a upward direction to support the side of the material;
A through hole through which the guide bar penetrates is formed, and is disposed on an upper portion of the base plate so that material is formed on an upper surface thereof. Up and down A support plate laminated;
A lifting member for moving the support plate in a vertical direction; Lt; / RTI >
The support plate Ascend by the elevating member so that the material laminated on the upper surface is supported while supporting the guide bar,
And the elevating member is configured to raise the support plate by the thickness of the transferred material as the material stacked on the upper surface of the support plate is transferred by the material transfer unit. The method according to claim 1,
A material supply unit disposed at an upper portion of the material transfer unit for transferring materials;
A conveying rail part which horizontally conveys the first carrier comprising the base plate, the guide bar, and the support plate and inserts the material into the material supply unit; Further comprising:
The lifting members are mounted on both left and right sides of the material supply part in a vertical direction in the front-rear direction in which the first carrier is transferred,
And the elevating member raises the support plate of the first carrier inserted into the material supply unit, and supplies the material stacked on the upper surface to the material transfer unit. The method according to claim 2,
A second carrier comprising the base plate, the guide bar and the support plate; Further comprising:
The conveying rail part is disposed in the front-rear direction of the material supply part, and the first carrier and the second carrier are respectively disposed in the front-rear direction of the material supply part at the upper part of the conveying rail part,
The first carrier and the second carrier material stacking and supplying apparatus, characterized in that the transfer is inserted into the material supply section along the transfer rail portion. delete The method according to claim 1 or 2,
The elevating member
A plurality of lead screws disposed on both sides of the support plate and rotatably mounted in a vertical direction;
A motor for rotating the lead screw;
A support part mounted on the lead screw and supporting both lower sides of the support plate while moving up and down by the lead screw rotated by the motor; Lt; / RTI >
The width of the support plate is formed larger than the width of the base plate, the shortest distance between the support portions disposed on both sides of the support plate is shorter than the width of the support plate, characterized in that longer than the width of the base plate Lamination and Feeder. The method according to claim 1 or 2,
The material,
A first material having a rod shape;
A second material formed in a rod shape and spaced apart from and parallel to the first material;
A third material disposed vertically between the first material and the second material to connect the first material and the second material; Lt; / RTI >
The guide bar,
A first guide bar disposed in an opposite direction of the third material with respect to the first material to prevent the first material from moving in the opposite direction of the third material;
A second guide bar disposed in an opposite direction of the third material with respect to the second material to prevent the second material from moving in the opposite direction of the third material;
Third guide bars disposed on left and right sides of the third material to prevent the third material from moving in both left and right directions; Lt; / RTI >
A coupling hole is formed in the base plate, and the first guide bar, the second guide bar, and the third guide bar are attached and detached to the coupling hole, respectively.

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