KR102148465B1 - Mold for making scaffold pipe connector and method using it - Google Patents

Abstract

The present invention relates to a scaffolding pipe connector manufacturing mold and a manufacturing method using the same, wherein different forming processes are sequentially performed while intermittently transferring a strap-shaped material one pitch by one horizontally between an upper mold and a lower mold. A mold for manufacturing a pipe connector, comprising: a piercing means for punching a pilot hole on both sides of a material to be transferred and punching an inner groove in the center; A notching means for punching inwardly at both ends of the pierced material to form side members on both sides and forming a bridge at the center; A bridge dividing means for punching the center of the bridge to form a pair of bridges on both sides; Primary bending means for pressing and bending the center of the material on which the bridge is formed with a V-type press along the longitudinal direction to form a V-shaped bent portion; A forming means for forming a semicircular shape by pressing both side members around the bent portion; A secondary bending means for forming a pipe insertion hole by bending the formed side members downward; It characterized in that it comprises a; cutting means for separating and taking out the finished connector by cutting the bridge.

Description

Mold for making scaffold pipe connector and method using it}

The present invention relates to a scaffold pipe connector manufacturing mold and a manufacturing method, and more particularly, a manufacturing mold for manufacturing a connector used when interconnecting scaffold pipes used for installing temporary objects, and a connector using the manufacturing mold. It relates to a method of manufacturing.

In general, scaffolding consists of a number of vertical pipes installed vertically from the ground and a number of horizontal pipes installed at regular intervals on the vertical pipes, so it can work at high places in various industrial sites such as construction sites or shipyards. It is a temporary facility installed so that it is possible.

At this time, the scaffolding pipe connector is used to connect the pipes to each other, and it is used for fastening with a fixing plate and a fixing pin that are installed at the end of the horizontal pipe and fixed to the vertical pipe at regular intervals.

1 is a perspective view showing the appearance of a general scaffold pipe connector.

The connector 1 has a flat plate having a certain length bent to form side members 2 on both sides, and each side member 2 is formed in a semicircular shape in a direction facing each other so that a horizontal pipe is inserted and coupled to the rear. A shaped pipe insert 4 is formed.

In addition, in the middle of the bent portion 3 toward the front of the side member 2, a horizontally cut inner groove 5 is formed so that the fixing plate fixed to the vertical pipe is inserted.

In addition, the upper and lower portions of the side members 2 face each other and are spaced apart from each other, and the upper fitting hole (not shown) penetrates the connecting pin (not shown) that is inserted into the fastening hole of the fixed plate inserted into the inner recess 5. 6) and a lower fitting hole 7 are formed.

In addition, the bent portion 3 is formed in an'M' shape in cross section, and a close contact portion 8 is formed on the front surface of the pipe in close contact with the outer circumferential surface.

The conventional method of manufacturing a scaffolding pipe connector of this structure is to form a body with a press mold from a steel plate, as disclosed in the prior art below, and form a semicircular pipe insertion hole at both ends of the body, and press the center of the body to both sides. After the first bending processing to cause the side members to be bent backward, the second bending processing is performed in which the bent portions, which are connection portions of both side members, are formed to have a narrow width. And finally, it is manufactured through a process of pressing the contact portion on the front surface of the bent portion.

However, since the conventional manufacturing method uses a separate mold step by step, a worker must be arranged for each mold, so waste of manpower and an increase in manufacturing cost have become a problem.

In addition, since the products are produced manually one by one, the productivity is very low, and it is not suitable for mass production.

-Republic of Korea Patent Registration 10-0544876 (January 3, 2006) "Forming device for pipe connection pins for scaffolding" -Republic of Korea Patent Registration 10-1516423 (2015.4.23) "Horizontal pipe connection of scaffolding and its manufacturing method" -Korean Patent Registration 10-1625012 (May 23, 2016) "Connector for building scaffolding and its manufacturing method"

Accordingly, the present invention is to solve the above-described problem, and an object of the present invention is to solve the problem of using several molds step by step when manufacturing a connector in the related art, while intermittently transporting the material in one mold and continuously processing it. It is to provide a scaffolding pipe connector manufacturing mold and a manufacturing method using the same that can manufacture a finished product.

The scaffolding pipe connector manufacturing mold according to the present invention for achieving the above object relates to a manufacturing method and a different molding process while intermittently transferring a strap-shaped material horizontally between an upper mold and a lower mold by one pitch. In the mold for manufacturing the scaffold pipe connector by proceeding in this order, the piercing means for punching a pilot hole on both sides of a material to be transferred and punching an inner groove in the center; A notching means for punching inwardly at both ends of the pierced material to form side members on both sides and forming a bridge at the center; A bridge dividing means for punching the center of the bridge to form a pair of bridges on both sides; Primary bending means for pressing and bending the center of the material on which the bridge is formed with a V-type press along the longitudinal direction to form a V-shaped bent portion; A forming means for forming a semicircular shape by pressing both side members around the bent portion; A secondary bending means for forming a pipe insertion hole by bending the formed side members downward; It may include a; cutting means for separating and taking out the finished connector by cutting the bridge.

At this time, between the piercing means and the notching means, a chamfering means for chamfering the edge of the pierced inner groove may be further provided.

Further, guide lifts for guiding the transfer of the material may be further provided on both sides of the primary bending means.

In addition, a nitrogen gas spring may be further provided on the upper side of the secondary bending means to press and fix the bent portion during bending.

In the method of manufacturing a scaffold pipe connector according to another embodiment of the present invention, different forming processes are sequentially performed while intermittently transferring a strap-shaped material one pitch by one horizontally between an upper mold and a lower mold, and finally, a scaffold pipe connector. In the method of manufacturing a piercing step of punching a pilot hole on both sides of the material to be transferred and punching an inner groove in the center; A notching step of punching so as to cut inwardly at both ends of the pierced material in the piercing step to form side members on both sides, and to form a bridge at the center; A bridge dividing step of punching the center of the bridge formed in the notching step to form a pair of bridges on both sides; A first bending step of pressing and bending the center of the material on which the bridge is formed along the longitudinal direction to form a V-shaped bent portion; Forming a semicircular shape by pressing both side members around the bent portion; A second bending step of forming a pipe insertion hole by bending the side members formed in the forming step downward; It may include a cutting step of cutting the bridge to separate and take out the finished connector.

Here, between the piercing step and the notching step, a chamfering step of chamfering the edge of the pierced inner groove may be further performed.

According to the present invention having the above-described configuration, while intermittently supplying a material to one mold, each processing step is continuously performed, so that a connector as a finished product can be automatically manufactured, thereby rapidly improving productivity.

And because only one worker is required to manage the mold, the cost is greatly reduced.

1 is a perspective view showing the appearance of a general scaffold pipe connector
Figure 2 is a side view of a scaffold pipe connector manufacturing mold according to an embodiment of the present invention
FIG. 3 is a plan view showing a stepwise shape of a material manufactured by the present invention shown in FIG. 2
Figure 4 is a plan view showing the lower mold shown in Figure 2
Figure 5 is a bottom view showing the upper mold shown in Figure 2
Figure 6 is a front cross-sectional view showing the primary bending means of the present invention
Figure 7 is a side cross-sectional view showing the forming means of the present invention
Figure 8 is a front cross-sectional view showing the secondary bending means of the present invention
9 is a front cross-sectional view showing the cutting means of the present invention
10 is a flow chart showing the sequence of a method for manufacturing a scaffold pipe connector according to another embodiment of the present invention

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. Further, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, a detailed description will be omitted.

1 is a perspective view showing the appearance of a general scaffold pipe connector, and FIG. 2 is a side view of a scaffold pipe connector manufacturing mold according to an embodiment of the present invention.

The present invention intermittently transfers a sheet-shaped material (p) like a strap between an upper mold and a lower mold by one pitch, while piercing, chamfering, notching, bridge division, primary bending, forming, and secondary in one mold. It relates to a mold for manufacturing a finally finished scaffolding pipe connector product by sequentially performing bending and cutting processes.

The present invention as described above is largely, the upper mold 10 and the lower mold 20, and the piercing means 100, which are sequentially disposed in the upper mold 10 and the lower mold 20, the chamfering means 200 , A notching means 300, a bridge splitting means 400, a primary bending means 500, a forming means 600, a secondary bending means 700, and a cutting means 800.

And in the present invention, since the transfer device for intermittently transferring the material one pitch at a time uses a known one, a detailed description will be omitted.

Each main configuration will be described in detail with reference to FIGS. 3 to 5 together. 3 is a plan view showing the shape of the material manufactured by the present invention shown in FIG. 2, FIG. 4 is a plan view showing the lower mold shown in FIG. 2, and FIG. 5 is a bottom view showing the upper mold shown in FIG. Is also.

First, the piercing means 100 is provided on the inlet side of the mold to form a pilot hole (h) for fixing the position of the material during processing on both sides of the material to be transferred, and the inner inlet groove (5) of the connector 1 in the center ) To form. (See Fig. 1)

For this, the piercing means 100 includes a pilot punch 110 for punching a pilot hole (h), and a pilot punch 110 for punching the upper mold 10, and the internal groove punch 120 for punching the internal groove 5 It is provided to be spaced apart from the pilot punch 110 and a predetermined interval.

In addition, a punch hole 110 ′ into which the pilot punch 110 is inserted is formed in the lower mold 20 at a position corresponding to the pilot punch 110, and the internal groove punch 120 is inserted. A punch hole 120' is also formed.

In addition, the upper mold 10 is provided with a pilot pin 130 inserted into the pilot hole h of the material to be transferred one pitch apart from the pilot punch 110, and a position corresponding to the lower mold 20 A pinhole 130' is formed in the. The pilot pin 130 passes through the pilot hole h and is inserted into the pin hole 130 ′ to fix the position of the material p during punching.

Next, the notching means 300 will be described.

The notching means 300 is a configuration for punching so as to cut the outer periphery of both ends of the pierced material and at the same time cut inward from both ends. This removes unnecessary edge portions of the connector, separates the connector one by one, and forms a bridge (b) so as to be transported together during transport.

To this end, the notching means 300 is provided with a notching punch 310 having an approximately'┬' or'┴' shape in the upper mold 10, and the notching punch 310 in the lower mold 20 ) Corresponding to the punch hole 320 is formed.

It is preferable that the notching punch 310 is arranged such that the first notching punch 311 and the second notching punch 312 are spaced apart by 1 pitch and are located on opposite sides of each other.

Therefore, when the material p passes through the first notched punch 311 and the second notched punch 311, it is cut inward at both ends of the material to form a bridge b in the center, as shown in FIG. The side member 2 of the connector 1 is formed.

Next, it is preferable that a chamfering means 200 is further included between the piercing means 100 and the notching means 300 in the present invention.

The chamfering means 200 is a means for chamfering the edges of the inner groove 5, and a chamfer 220 accommodated in the die of the lower mold 20 is provided. At this time, the chamfer 220 protrudes slightly from the die surface of the lower mold 20 and is formed slightly larger than the width or width of the inner groove 5.

Therefore, when the inner groove 5 is located on the top of the chamfer 220 and the die of the upper mold 10 is pressed while being lowered, the outer circumference of the chamfer 220 presses the edge of the inner groove 5 Perform chamfering or deburring.

Next, the bridge splitting means 400 will be described.

The bridge splitting means 400 is configured to punch the center of the bridge (b) formed by the notching means (300) to form two bridges (b).

To this end, a bridge punch 410 is provided in the upper mold 10 and a punch hole 420 is formed in a position corresponding to the lower mold 20.

Since the bridge (b) is formed in this way, the material being processed can be transferred in a line. In addition, the bridge (b) is split left and right to form a pair, so that it is transferred in a line without being distorted or shifted to one side during transfer.

In addition, when the bent portion 3 is formed by the primary bending means 500 to be described later, since the bridge (b) is split on both sides, interference can be prevented.

Next, the primary bending means 500 will be described with reference to FIG. 6. 6 is a cross-sectional view showing the primary bending means of the present invention.

The primary bending means 500 is a configuration for forming the bent portion 3 of the connector 1, and is formed on the V-shaped press 510 provided in the upper mold 10 and the lower mold 20 It may be configured to include a V-shaped groove 520.

The V-type press 510 is provided along the longitudinal direction of the material and is pressed along a center line connecting the bridge (b) in front and rear of one connector to form a bent portion (3).

Preferably, a guide lift 530 may be further provided to guide the transfer of the material to both sides of the V-shaped groove 520.

The gap between the guide lifts 530 is separated by the same distance as the width of the material p determined after notching by the notching means 300 so that the material seated between the guide lifts 530 on both sides is left and right when bending Hold it so that it does not shake.

Next, the forming means will be described with reference to FIG. 7. 7 is a side cross-sectional view showing the forming means of the present invention.

The forming means 600 is configured to press both ends of the material bent by the primary bending means 500 to form a semicircular shape.

That is, the material is formed with side members 2 on both sides centering on the bent part 3, and forming is bent downward around the bent part 3 by pressing the side members 2, and the ends are respectively It should be molded into a semicircle.

To this end, the forming means 600 includes a forming die 620 provided in the lower mold 20 and a forming press 610 provided in the upper mold 10.

The forming die 620 and the forming press 610 are formed symmetrically on both sides, respectively, and form a semicircular shape.

Accordingly, when the forming press 610 presses the material placed on the forming die 620, the ends of the both side members 2 are each formed into a semicircular shape.

Next, the secondary bending means will be described with reference to FIG. 8. 8 is a cross-sectional view showing the secondary bending means of the present invention.

The secondary bending means 700 is configured to completely bend the material formed in a semicircular shape by the forming means 600 to form a pipe insertion port 4 of the connector.

The secondary bending means 700 includes a bending die 720 fixed to the lower mold 20 and a bending press 710 provided on the upper mold 10.

The upper end of the bending die 720 is made in a V-shape so that the bent part 3 is seated, and the bending press 710 is provided on both sides of the bent part 3, respectively, to In other words, the side members 2 are respectively pressed.

It is preferable that a nitrogen gas spring 730 is further provided between the upper side of the bending die 720, specifically between the bending presses 710. When bending by the elastic force of the nitrogen gas spring 630, the bent portion 3 may be strongly pressed and fixed.

For reference, the nitrogen gas spring 630 may also be provided between the forming presses 610 of the forming means.

In addition, take-out lifts 740 are provided on both sides of the bending die 720 to push up and release the bent product. The take-out lift 740 is supported by a spring (not shown). When the bending press 710 is pressurized and then rises, the take-out lift 740 rises by a spring and pushes up the bent product to be taken out.

Next, the cutting means 800 will be described with reference to FIG. 9. 9 is a cross-sectional view showing a cutting means of the present invention.

The cutting means 800 cuts the bridge (b) to take out the molded material (p) to separate and take out the final product, the connector (1).

The cutting means 800 includes a cutting blade 810 provided on the upper mold 10 and a cutting die 820 provided on the lower mold 20. The cutting die 820 has a groove formed so that the bent portion 3 is seated, and the cutting blade 810 is provided at a position corresponding to the bridge b.

The connector (1), which is a finished product separated by the cutting means (800), is pushed and finally taken out by an operation that is then transferred by one pitch.

Hereinafter, a method of manufacturing a scaffold pipe connector according to another embodiment of the present invention will be described with reference to FIG. 10.

The first step is the piercing step.

The piercing step is a step of punching the pilot holes (h) on both sides of the material (p) and punching the inner groove (5) in the center to form. The pilot hole h is perforated on both sides of the material by the pilot punch 110, and the inner groove 5 is formed by the inner groove punch 120.

The inner groove 5 may have a'+' shape that is long toward one side.

The second step is the chamfering step.

The chamfering step is performed by the chamfer 220 as chamfering the edge of the inner groove 5. As the material (p) is pressed, the chamfer 220 is forcibly fitted into the inlet groove 5, and a rounding treatment is performed on the sharp edge of the inner inlet groove 5, and the burr generated during punching can be removed. have.

At this time, when the chamfering step is performed, the pilot pin 130 is inserted into the pilot hole h previously formed to fix the position of the material p. That is, the material p is fixed at an accurate position so that the chamfering is performed accurately.

The third step is the notching step.

In the notching step, the material p is punched inward at both ends of the material p to form a cut shape.

A notching punch 310 of roughly'┬' or'┴' shape punches one side of the material (p) first, and then punches the other side after transferring one pitch so that a bridge (b) is formed in the center of the material (p). At the same time, the side members 2 of the connector 1 are formed on both sides.

Since the first notching punch 311 and the second notching punch 312 on one side are spaced apart, the first notching punch 311 punches one side of the material p first, and then the second notching punch 312 after transfer. Does not punch both sides at once by punching the other side.

Therefore, by forming the bridge (b) through the notching step, one connector (1) is distinguished from the other, and is connected to each other so that it can be transferred for sequential processing.

The fourth step is the bridge division step.

In the bridge dividing step, two bridges are formed by punching the center of the bridge (b) formed in the notching step and dividing it into both sides.

The bridge punch 410 having a square cross section punches the center of the bridge b, thereby forming a left bridge and a right bridge.

By doing this, even if the V-type press 510 is pressed in the first bending step to be described later, the bridge b, which does not need to be bent, is not bent.

The fifth step is the first bending step.

The first bending step is a step of forming the bent portion 3 of the connector 1, and the V-type press 510 is pressed while the center line of the material p is seated in the V-shaped groove 520 As a result, the bent portion 3 bent in a V-shape is formed.

At this time, the bridge (b) is also pressed together, but since the V-type press 510 presses between the left and right bridges, the bridge (b) is not bent.

The sixth step is the forming step.

The forming step is a step of forming the pipe insertion hole 4 of the connector 1, and is formed into a semicircular shape by pressing the side members 2 on both sides of the bent part 3 as the center.

That is, while the forming press 610 presses the side members 2 located on the upper side of the forming die 620 having both sides forming a semicircular shape, the ends of both side members 2 are molded into a semicircular shape.

At this time, it is preferable that the bent part 3 is formed in a state that is elastically fixed by the nitrogen gas spring 630.

The seventh step is the second bending step.

The second bending step is a step of forming a pipe insertion hole 4 by bending both side members 2 of the formed material in a downward direction. That is, the ends of the semicircular side members 2 are gathered to form a circular pipe insertion hole 4.

In this case, bending is performed by pressing the side members 2 by both bending presses 710 while the bent portion 3 is fixed by the nitrogen gas spring 730.

The eighth step is a cutting step, and the bridge (b) is cut to take out the final product.

For reference, more shaping steps may be added.

The shaping step is to form the contact portion 8 of the finished connector and may be performed by cutting or pressing.

Although the exemplary embodiments of the present invention have been described above with reference to the drawings, a person of ordinary skill in the field to which the present invention belongs will be able to perform various applications and modifications within the scope of the present invention based on the above contents. Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

1: scaffold pipe connector 2: side member
3: bent part 4: pipe insertion port
5: internal groove 6: upper fitting hole
7: lower fitting hole 8: close contact
10: upper mold 20: lower mold
100: piercing means
110: pilot punch 110': punch hole
120: internal home punch 120': punch hole
130: pilot pin 130': pinhole
200: chamfering means 220: chamfer
300: notching means
310: notching punch 311: first notching punch
312: second notching punch 320: punch hole
400: Bridge splitting means
410: bridge punch 420: punch hole
500: primary bending means 510: V-type press
520: V-groove 530: guide lift
600: forming means 610: forming press
620: forming die 630: nitrogen gas spring
700: secondary bending means
710: bending press 720: bending die
730: nitrogen gas spring 740: take-out lift
800: cutting means
810: cutting edge 820: cutting die
p: material h: pilot hole
b: bridge

Claims (6)

In the mold that finally manufactures the scaffold pipe connector by sequentially performing different molding processes while intermittently transferring the strap-shaped material one pitch by one horizontally between the upper mold and the lower mold,
Piercing means for punching the pilot holes on both sides of the material to be transferred and punching the inner groove in the center;
Chamfering means for chamfering the edge of the pierced inner groove;
A notching means for punching inwardly at both ends of the pierced material to form side members on both sides and forming a bridge at the center;
A bridge splitting means comprising a bridge punch provided in the upper mold and a punch hole formed in the lower mold, wherein the bridge punch punches the center of the bridge to form a pair of bridges on both sides;
Primary bending means for pressing and bending the center of the material on which the bridge is formed with a V-type press along the longitudinal direction to form a V-shaped bent portion;
Guide lifts provided on both sides of the primary bending means to guide the transfer of the material;
A forming means comprising a semicircular forming die provided in the lower mold and a semicircular forming press provided in the upper mold, and forming a semicircular shape by pressing both side members around the bent part;
A secondary bending means for forming a pipe insertion hole by bending the formed side members downward;
A nitrogen gas spring provided on the upper side of the secondary bending means for pressing and fixing the bent portion during bending;
A scaffold pipe connector manufacturing mold comprising a; cutting means for separating and taking out the finished connector by cutting the bridge. delete delete delete In the method of finally manufacturing a scaffold pipe connector by sequentially performing different molding processes while intermittently transferring the strap-shaped material one pitch by one horizontally between the upper mold and the lower mold,
A piercing step of punching a pilot hole on both sides of the material to be transferred and punching an inner groove in the center;
A chamfering step of chamfering the edge of the pierced inner groove;
A notching step of punching so as to cut inwardly at both ends of the pierced material in the piercing step to form side members on both sides, and to form a bridge at the center;
A bridge splitting step in which a bridge punch provided in the upper mold punches the center of the bridge formed in the notching step to form a pair of bridges on both sides;
A first bending step of pressing and bending the center of the material on which the bridge is formed along the longitudinal direction to form a V-shaped bent;
A forming step of forming a semicircular shape by pressing both side members around the bent portion by a semicircular forming die provided in the lower mold and a semicircular forming press provided in the upper mold;
A second bending step of forming a pipe insertion hole by bending the side members formed in the forming step downward;
And a cutting step of separating and taking out the finished connector by cutting the bridge. delete

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