Formwork panel connector

Abstract

To provide a formwork panel connector that enables easy modification of concrete formwork panels.SOLUTION: A formwork panel connector 3 connects a first panel 2A and a second panel 2B of a concrete formwork 1. The formwork panel connector 3 comprises: a first pin 4 that fits into a first hole 12 provided in the first panel 20A and protrudes from the first panel 2A; a second pin 4 that fits into a second hole 12 provided in the second panel 20B and protrudes from the second panel 2B; and a connecting block 5 that has a first engagement recess 7 capable of engaging with the first pin 4 and a second engagement recess 8 capable of engaging with the second pin 4 and that connects the first panel 20A and the second panel 20B by engaging the first pin 4 with the first engagement recess 7 and engaging the second pin 4 with the second engagement recess 8.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION The present specification discloses a concrete form panel connector. [Background technology]

[0002] JP 2023-113114 A discloses a concrete formwork. This formwork includes a first formwork panel, a second formwork panel, and a joining member that joins these panels. The joining member has a first locking portion that engages with a ridge-shaped convex portion or a groove-shaped concave portion of the first formwork panel, and a second locking portion that engages with a ridge-shaped convex portion or a groove-shaped concave portion of the second formwork panel. The joining member joins the first formwork panel and the second formwork panel by engaging the first locking portion with the first formwork panel and the second locking portion with the second formwork panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2023-113114 Summary of the Invention [Problem to be solved by the invention]

[0004] In the joining method disclosed in JP 2023-113114 A, the formwork panels have ridge-like convex portions or groove-like concave portions shaped to be able to engage with the engaging portions of the joining members. This formwork construction requires the preparation of these formwork panels in advance. With these formwork panels, it is not easy to change the joining position or shape of the formwork panels at the formwork construction site.

[0005] SUMMARY OF THE INVENTION It is the applicant's intention to provide a form panel connector that allows for easy modification of concrete form panels. [Means for solving the problem]

[0006] The formwork panel connector disclosed in the present specification is a formwork panel connector that connects a first panel and a second panel of a concrete formwork, a first pin fitted into a first hole formed in the first panel and protruding from the first panel; a second pin fitted into a second hole formed in the second panel and protruding from the second panel; and, a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the connecting block connecting the first panel and the second panel by engaging the first pin with the first engaging recess and the second pin with the second engaging recess; Equipped with. [Effects of the Invention]

[0007] This form panel connector connects form panels that have holes into which pins fit. The drilling of these holes is easier than drilling special shapes. These holes can be easily drilled on-site during formwork construction. The form panel connector easily changes the joining position of form panels and alters the shape of form panels. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an explanatory view of a state in which a form panel connector according to one embodiment is used to connect form panels. [Figure 2] FIG. 2 is a perspective view of a pin provided in the formwork panel connector of FIG. [Figure 3] 3 is a perspective view of a connecting block provided in the formwork panel connector of FIG. 1. FIG. [Figure 4] FIG. 4 is a plan view of the connecting block of FIG. 3, with a portion thereof cut away. [Figure 5] 5A is an enlarged view of a portion designated by the symbol VA in FIG. 1, and FIG. 5B is a front view seen in the direction of the arrow VB in FIG. 5A. [Figure 6] 6A is a cross-sectional view taken along line VIA-VIA in FIG. 5A, and FIG. 6B is a cross-sectional view taken along line VIB-VIB in FIG. 5A. [Figure 7]FIG. 7A is an explanatory view showing a state in which a form panel connector according to another embodiment is used to connect form panels, and FIG. 7B is an explanatory view as seen in the direction of arrow VIIB in FIG. 7A. [Figure 8] FIG. 8A is an explanatory view showing a state in which a form panel connector according to yet another embodiment is used to connect form panels, and FIG. 8B is an explanatory view as seen in the direction of arrow VIIIB. DETAILED DESCRIPTION OF THE INVENTION

[0009] Preferred embodiments will be described in detail below with reference to the drawings as appropriate.

[0010] FIG. 1 shows a portion of a concrete formwork 1. Ready-mixed concrete is poured into the space enclosed by this formwork 1. The space enclosed by this formwork 1 allows the ready-mixed concrete to be molded into a predetermined shape. This formwork 1 comprises a plurality of panels 2 and a plurality of formwork panel connectors 3. The formwork 1 connects the panels 2 with the panel connectors 3.

[0011] Figure 1 shows multiple panels 2 connected by multiple panel connectors 3. Figure 1 also shows panel 2B connected to panel 2A, a portion of panel 2C connected to panel 2A, and a portion of panel 2D connected to panel 2B.

[0012] Each panel connector 3 includes a set of pins 4 attached to the panels 2 to be connected, and a connecting block 5 that engages with the set of pins 4. For example, when connecting panels 2A and 2B, one pin 4 of the set of pins 4 is attached to panel 2A, and the other pin 4 is attached to panel 2B. The connecting block 5 engages with the set of pins 4 to connect panels 2A and 2B.

[0013] 2 shows the pin 4 of the panel connector 3. The pin 4 has a head 4A, an engagement portion 4B extending from the head 4A toward the tip, an insertion portion 4C extending from the engagement portion 4B to the tip, and multiple protrusions 4D protruding from the insertion portion 4C and aligned in the circumferential direction.

[0014] The head 4A of each pin 4 has a disk shape. The engagement portion 4B has a cylindrical shape with a smaller diameter than the head 4A. The insertion portion 4C is also cylindrical with a smaller diameter than the engagement portion 4B and has a tapered shape that narrows toward the tip. The protrusion 4D protrudes radially outward from the outer peripheral surface 4E of the insertion portion 4C. The head 4A, engagement portion 4B, and insertion portion 4C have a circular cross-sectional shape, but this shape is an example and the shape of the pin 4 is not limited to this shape.

[0015] Fig. 3 shows the connecting block 5. In Fig. 3, arrow X indicates the forward direction of the connecting block 5, arrow Y indicates the leftward direction of the connecting block 5, and arrow Z indicates the upward and downward direction of the connecting block 5.

[0016] The connecting block 5 has a block body 6. The shape of this block body 6 is an example and is not limited to this. The connecting block 5 has a first groove 7 and a second groove 8 that penetrate from the top surface 6A to the bottom surface 6B of the block body 6. The first groove 7 extends in the front-rear direction of the block body 6 and opens to the front surface 6C of the block body 6. The second groove 8 extends along the first groove 7 in the front-rear direction of the block body 6 and opens to the front surface 6C of the block body 6.

[0017] The connecting block 5 has a first seat groove 9 recessed from the upper surface 6A of the block body 6 and extending in the front-rear direction along the first groove 7, and a second seat groove 10 recessed from the upper surface 6A and extending in the front-rear direction along the second groove 8. The first seat groove 9 and the second seat groove 10 are open to the front surface 6C.

[0018] The connecting block 5 has a bridge 11 that straddles the first groove 7 and the first seating groove 9 to connect the edges of the block bodies 6 that face each other with the first groove 7 in between, and that straddles the second groove 8 and the second seating groove 10 to connect the edges of the block bodies 6 that face each other with the second groove 8 in between. Note that the connecting block 5 may have a bridge 11 that straddles the first groove 7 and the first seating groove 9 and a bridge 11 that straddles the second groove 8 and the second seating groove 10 separately.

[0019] FIG. 4 shows the block body 6 with the bridge 11 removed. The dashed-dotted line CL in FIG. 4 represents the centerline of the block body 6 extending in the front-rear direction. In this block body 6, a first groove 7 is formed between wall surfaces 6D and 6E that face each other and extend in the front-rear direction. The first groove 7 has an opening 7A in the front surface 6C of the block body 6. Similarly, a second groove 8 is formed between wall surfaces 6F and 6G that face each other and extend in the front-rear direction. The second groove 8 has an opening 8A in the front surface 6C of the block body 6.

[0020] In this block body 6, the outer wall surface 6D away from the center line CL is inclined away from the center line CL from the rear of the block body 6 toward the front surface 6C. The inner wall surface 6E closer to the center line CL extends parallel to the center line CL from the rear of the block body 6 toward the front surface 6C. The width of the first groove 7 gradually increases toward the opening 7A. Similarly, the outer wall surface 6F away from the center line CL is inclined away from the center line CL from the rear of the block body 6 toward the front surface 6C. The inner wall surface 6G closer to the center line CL extends parallel to the center line CL from the rear of the block body 6 toward the front surface 6C. The width of the second groove 8 gradually increases toward the opening 8A.

[0021] The double-headed arrow Wg in Fig. 3 indicates the left-right width between the outer wall surface 6D of the first groove 7 and the outer wall surface 6F of the second groove 8. This left-right width Wg is wide on the front surface 6C of the block body 6 and narrows toward the back of the first groove 7 and the second groove 8. The left-right width Wg gradually decreases from the front surface 6C of the block body 6 toward the back of the first groove 7 and the second groove 8.

[0022] In this block body 6, the outer wall surface 6H and the inner wall surface 6I extend parallel to the center line CL from the rear of the block body 6 toward the front surface 6C with the first seating groove 9 between them. The outer wall surface 6J and the inner wall surface 6K extend parallel to the center line CL from the rear of the block body 6 toward the front surface 6C with the second seating groove 10 between them.

[0023] 5A and 5B show a panel connector 3 that connects panels 2A and 2B. As shown in Fig. 5B, panel 2A has a surface 2P that forms the cement surface, a back surface 2Q opposite surface 2P, and a side surface 2R that abuts against panel 2B. Panel 2B has a surface 2S that forms the cement surface, a back surface 2T opposite surface 2S, and a side surface 2U that abuts against panel 2A.

[0024] As shown in Figure 5B, one pin 4 is attached to panel 2A and protrudes from the back surface 2Q. The head 4A and engagement portion 4B of one pin 4 protrude from the back surface 2Q of panel 2A. Similarly, the other pin 4 is attached to panel 2B and protrudes from the back surface 2T. The head 4A and engagement portion 4B of the other pin 4 protrude from the back surface 2T of panel 2B.

[0025] The engaging portion 4B of one pin 4 is engaged with the first groove 7. The width of the first groove 7 is larger than the diameter of the engaging portion 4B of this pin 4. The vertical height of the wall surface 6D and the wall surface 6E that form the first groove 7 is smaller than the height of the engaging portion 4B of this pin 4. The engaging portion 4B of this pin 4 can pass through the opening 7A and can move along the first groove 7. The width of the first seating groove 9 is larger than the diameter of the head portion 4A of the pin 4. The vertical height of the opening 9A of the first seating groove 9 is larger than the height of the head portion 4A of the pin 4. The head portion 4A can pass through the opening 9A and can move along the first seating groove 9.

[0026] Like one pin 4, the engaging portion 4B of the other pin 4 engages with the second groove 8. The width of the second groove 8 is larger than the diameter of the engaging portion 4B of this pin 4. The vertical height of the wall surface 6F and the wall surface 6G that form the second groove 8 is smaller than the height of the engaging portion 4B of the pin 4. The engaging portion 4B of this pin 4 can pass through the opening 8A and can move along the second groove 8. The width of the second seating groove 10 is larger than the diameter of the head portion 4A of the pin 4. The vertical height of the opening 10A of the second seating groove 10 is larger than the height of the head portion 4A of the pin 4. The head portion 4A can pass through the opening 10A and can move along the second seating groove 10.

[0027] In this panel connector 3, the left-right width Wg between the outer wall surface 6D of the first groove 7 and the outer wall surface 6F of the second groove 8 gradually decreases from the front openings 7A and 8A toward the rear ends of the first groove 7 and the second groove 8. In FIG. 5A, one pin 4 is engaged at the rear end of the first groove 7, and the other pin 4 is engaged at the rear end of the second groove 8. In FIG. 5A, the wall surface 6D is pressed against one pin 4, and the wall surface 6F is pressed against the other pin 4. This causes the side surface 2R of the panel 2A and the side surface 2U of the panel 2B to be pressed against each other.

[0028] 6A shows a cross section taken along line VIA-VIA in FIG. 5A. The diameter of the head 4A of the pin 4 is larger than the width of the first groove 7. The head 4A prevents one pin 4 from slipping out of the first groove 7. The diameter of the head 4A of the pin 4 is larger than the width of the second groove 8. The head 4A prevents the other pin 4 from slipping out of the second groove 8.

[0029] FIG. 6B shows a cross section taken along line VIB-VIB in FIG. 5A. A hole 12 opening to the rear surface 2Q is formed in the panel 2A. This hole 12 has a bottom and does not penetrate to the front surface 2P. Alternatively, the hole 12 may penetrate to the front surface 2P. An insertion portion 4C of one pin 4 is inserted into the hole 12, and the pin 4 is fitted to the panel 2A. A protrusion 4D of the pin 4 engages with the inner circumferential surface of the hole 12. The protrusion 4D prevents the pin 4 from slipping out of the hole 12. The protrusion 4D firmly fits the pin 4 to the panel 2A. Similar to the panel 2A, a hole 12 opening to the rear surface 2T is also formed in the panel 2B. Similarly to the panel 2A, the insertion portion 4C of the other pin 4 is inserted into the hole 12 in the panel 2B, and the pin 4 is fitted to the panel 2B. The protrusion 4D firmly fits the pin 4 to the panel 2B.

[0030] Here, a method for connecting panels 2A and 2B using panel connector 3 will be described.

[0031] As shown in FIG. 6B , a panel 2A with one pin 4 fitted in a hole 12 and a panel 2B with the other pin 4 fitted in a hole 12 are prepared. The worker arranges the panels 2A and 2B so that the side surface 2R of the panel 2A abuts the side surface 2U of the panel 2B. The worker passes one pin 4 through the opening 7A of the first groove 7 and the opening 9A of the first seat groove 9, and passes the other pin 4 through the opening 8A of the second groove 8 and the opening 10A of the second seat groove 10, as shown in FIG. 5B . The worker engages one pin 4 with the first groove 7 and the other pin 4 with the second groove 8, thereby engaging the connecting block 5 with the set of pins 4. The worker moves the connecting block 5 along the first groove 7 and the second groove 8 relative to the set of pins 4, moving one pin 4 to the back of the first groove 7 and the other pin 4 to the back of the second groove 8. In this way, the panel connector 3 is brought into the use state shown in Figures 5A and 5B.

[0032] Furthermore, in the work of dismantling the formwork 1, the worker moves the connecting block 5 along the first groove 7 and the second groove 8 relative to the set of pins 4, moving one pin 4 from the back of the first groove 7 to the opening 7A, and moving the other pin 4 from the back of the second groove 8 to the opening 8A. The worker removes the connecting block 5 from the set of pins 4. In this way, with this disconnection method, the worker only needs to release the engagement between the connecting block 5 and the set of pins 4.

[0033] In this connecting method, a panel 2A having one pin 4 press-fitted into a hole 12 and a panel 2B having the other pin 4 press-fitted into a hole 12 are prepared, but the connecting method using the panel connector 3 is not limited to this. For example, panels 2A and 2B having a plurality of holes 12 formed therein may be prepared, and an operator may fit a pin 4 into a hole 12 selected from the plurality of holes 12. Alternatively, an operator may form holes 12 in panels 2A and 2B having no holes 12 formed therein, and then fit the pin 4 into the selected hole 12.

[0034] This panel connector 3 can connect panels 2 as long as the panels 2 have holes 12 into which the pins 4 can be fitted. The holes 12 can be drilled relatively easily with a drilling tool. For example, at a formwork construction site, workers can change the positions of the holes 12 in the panels 2 as needed. Because the positions of the holes 12 can be changed, workers can also easily change the shape and size of the panels 2.

[0035] From the viewpoint of facilitating the processing of holes 12 and the processing of changing the shape and size, it is preferable that panels 2 be wooden boards such as plywood or plywood. Furthermore, since this panel connector 3 can connect any panel 2 that has holes 12, holes 12 can be processed in a conventional panel and used as the panel 2.

[0036] Furthermore, the first groove 7 is an example of a first engagement recess, and the first engagement recess is not limited to the first groove 7 as long as it can engage with the pin 4. Similarly, the second groove 8 is an example of a second engagement recess, and the second engagement recess is not limited to the second groove 8 as long as it can engage with the pin 4.

[0037] The panel connector 3 can connect panels 2A and 2B simply by engaging one pin 4 in the first groove 7 and the other pin 4 in the second groove 8 using the connecting block 5. Once panels 2A and 2B with appropriate holes 12 are prepared, the pins 4 can be easily fitted into the holes 12. Furthermore, a worker can connect panels 2A and 2B simply by moving the connecting block 5, which is engaged with a pair of pins 4, along the first groove 7 and the second groove 8. The connecting operation using these pins 4 and connecting block 5 is easy. The panel connector 3 can be fitted and connected easily even by an unskilled or inexperienced worker.

[0038] The pin 4 has an insertion portion 4C that fits into the hole 12, an engagement portion 4B that protrudes from the panel 2A and engages with the first groove 7, and a head portion 4A that prevents the engagement portion 4B from slipping out of the first groove 7. Because the pin 4 has the insertion portion 4C, it can be fitted into the panel 2A with the engagement portion 4B and head portion 4A protruding from the panel 2A. From the perspective of allowing the engagement portion 4B and head portion 4A to protrude from the panel 2A, it is preferable that the insertion portion 4C has a smaller diameter than the engagement portion 4B. Furthermore, from the perspective of facilitating insertion of the insertion portion 4C into the panel 2A, it is preferable that the insertion portion 4C has a tapered shape that narrows toward the tip. With the engagement portion 4B engaged with the first groove 7, the pin 4 is prevented from slipping out by the head portion 4A. From this perspective, it is preferable that the pin 4 has a head portion 4A.

[0039] The pin 4 has a protrusion 4D that protrudes from the outer peripheral surface 4E of the insertion portion 4C and engages with the hole 12. The protrusion 4D protrudes radially outward from the outer peripheral surface 4E of the insertion portion 4C. In this pin 4, the protrusion 4D bites into the inner peripheral surface of the hole 12. The pin 4 is firmly fitted into the panel 2A. From this perspective, it is preferable that the pin 4 has a protrusion 4D.

[0040] In the panel connector 3, the first engagement recess that engages with one pin 4 is the first groove 7, and the second engagement recess that engages with the other pin 4 is the second groove 8 that extends along the first groove 7. This makes it easy for the connecting block 5 to engage one pin 4 with the first groove 7 and the other pin 4 with the second groove 8. The connecting block 5 can easily engage one pin 4 protruding from the panel 2A and the other pin 4 protruding from the panel 2B.

[0041] In the panel connector 3, the left-right width Wg between the outer wall surface 6D of the first groove 7 and the outer wall surface 6F of the second groove 8 gradually decreases from the openings 8A of the first groove 7 and the second groove 8 toward the back. When one pin 4 moves to the rear back of the first groove 7 and the other pin 4 moves to the rear back of the second groove 8, the wall surface 6D is pressed against one pin 4 and the wall surface 6F is pressed against the other pin 4. In the panel connector 3, when the connecting block 5 is moved along the first groove 7 and the second groove 8, the side surface 2R of the panel 2A and the side surface 2U of the panel 2B are pressed against each other. The panel connector 3 can easily generate a pressing force between the panels 2A and 2B.

[0042] Furthermore, since the left-right width Wg gradually decreases from the opening 7A of the first groove 7 and the opening 8A of the second groove 8 toward the back, even if there is an error in the distance between the pin 4 protruding from the panel 2A and the pin 4 protruding from the panel 2B, a pressing force can easily be generated between the panel 2A and the panel 2B.

[0043] In the block body 6 of this panel connector 3, the width of the first groove 7 gradually increases from the back of the first groove 7 toward the opening 7A. This allows the first groove 7 to easily engage with the pin 4. From this perspective, it is preferable that the width of the first groove 7 gradually increases from the back of the first groove 7 toward the opening 7A. Similarly, it is preferable that the width of the second groove 8 gradually increases from the back of the second groove 8 toward the opening 8A.

[0044] The first groove 7 extends longitudinally to the end of the connecting block 5 and has an opening 7A on the front surface 6C of the block body 6, which is the end of the connecting block 5. This allows the pin 4 protruding from the panel 2A to be inserted into the first groove 7 through the opening 7A. Similarly, the pin 4 protruding from the panel 2B can be inserted into the second groove 8 through the opening 8A.

[0045] On the other hand, the panel connector 3 has a bridge 11 that connects one edge and the other edge of the connecting blocks 5 that are spaced apart in the width direction of the first groove 7 by allowing the engaging portion 4B of the pin 4 to pass through. This bridge 11 prevents the wall surface 6D from being pressed against the pin 4, thereby preventing the first groove 7 from deforming in a direction that widens the width. Similarly, the bridge 11 connects one edge and the other edge of the connecting blocks 5 that are spaced apart in the width direction of the second groove 8 by allowing the engaging portion 4B of the pin 4 to pass through. This bridge 11 prevents the wall surface 6F from being pressed against the pin 4, thereby preventing the second groove 8 from deforming in a direction that widens the width. From this perspective, it is preferable that the panel connector 3 have a bridge 11.

[0046] Furthermore, the connecting block 5 in which the lateral width Wg between the outer wall surface 6D of the first groove 7 and the outer wall surface 6F of the second groove 8 gradually decreases from the opening 7A of the first groove 7 and the opening 8A of the second groove 8 toward the rear may be engaged with an engaging protrusion other than the pin 4. The connecting block 5 may connect the panels 2A and 2B by engaging a first engaging portion protruding from the panel 2A with the first groove 7 and a second engaging portion protruding from the panel 2B with the second groove 8. In this case, too, the effect of the lateral width Wg gradually decreasing from the opening 8A of the first groove 7 and the opening 8A of the second groove 8 toward the rear can be obtained. The effect of the width of the first groove 7 gradually increasing from the rear of the first groove 7 toward the opening 7A can also be obtained. Furthermore, the effect of the first groove 7 having the opening 7A on the front surface 6C of the block body 6 can also be obtained. Furthermore, the effect of having a bridge 11 connecting one edge and the other edge of the connecting blocks 5 separated in the width direction of the first groove 7 so that the engaging portion 4B of the pin 4 can pass through can also be obtained.

[0047] In this formwork 1, the holes 12 in the panel 2A are bottomed holes. These holes 12 do not penetrate to the surface 2P that forms the shape of the cement surface. Furthermore, bottomed holes 12 provide greater strength to the panel 2A than through holes. From these perspectives, it is preferable that the holes 12 in the panel 2A are bottomed holes. For example, in the case of plywood, which is a common formwork panel, the thickness from the bottom of the hole 12 to the surface 2P is preferably 4 mm or more from the standpoint of the strength of the panel 2A. Note that in this formwork 1, the holes 12 may penetrate to the surface 2P.

[0048] This panel connector 3 connects panels 2A and 2B so that surface 2P of panel 2A and surface 2S of panel 2B are in the same plane, but the connector for panels 2 is not limited to this. Panels 2 may be connected by, for example, panel connector 23 shown in Figures 7A and 7B or panel connector 33 shown in Figures 8A and 8B.

[0049] Fig. 7A shows a panel connector 23 according to another embodiment in use. In Fig. 7A, the panel connector 23 connects panels 2A and 2B. Fig. 7B shows the panel connector 23 in use as seen in the direction of arrow VIIB in Fig. 7A. Here, the following description will focus on the configuration of the panel connector 23 that differs from the panel connector 3. The same components as those of the panel connector 3 will be omitted and will be described using the same reference numerals.

[0050] As shown in Figure 7B, panels 2A and 2B are arranged so that the surface 2P of panel 2A is perpendicular to the surface 2S of panel 2B. The back surface 2Q of panel 2A is perpendicular to the back surface 2T of panel 2B. The side surface 2R of panel 2A abuts the back surface 2T of panel 2B. As shown in Figure 7B, the back surfaces 2Q and 2T intersect perpendicularly in a recessed corner shape. One pin 4 protrudes from the back surface 2Q of panel 2A, and the other pin 4 protrudes from the back surface 2T of panel 2B.

[0051] The panel connector 23 includes a set of pins 4 and a connecting block 25 that engages with the set of pins 4. The connecting block 25 has a block body 26 that can abut against back surfaces 2Q and 2T that are perpendicular to each other in an internal corner. Similar to the connecting block 5, the connecting block 25 has a first groove 7, a second groove 8, a first seating groove 9, and a second seating groove 10. The connecting block 25 has a bridge 31 that straddles the first groove 7 and the first seating groove 9 to connect the edges of the block bodies 26 that face each other across the first groove 7, and that straddles the second groove 8 and the second seating groove 10 to connect the edges of the block bodies 26 that face each other across the second groove 8.

[0052] 7A and 7B, the wall surface 26D of the block body 26 is pressed against one of the pins 4, and the panel 2A is pressed against the panel 2B. The panel connector 23 presses the side surface 2R of the panel 2A against the back surface 2T of the panel 2B.

[0053] Fig. 8A shows a panel connector 33 according to yet another embodiment in use. In Fig. 8A, the panel connector 33 connects panels 2A and 2B. Fig. 8B shows the panel connector 33 in use as seen in the direction of arrow VIIIB in Fig. 8A. Here, the panel connector 33 will be mainly described in terms of configurations that differ from the panel connector 3. Descriptions of configurations that are similar to those of the panel connector 3 will be omitted and will be described using the same reference numerals.

[0054] As shown in FIG. 8B, panels 2A and 2B are arranged so that the front surface 2P of panel 2A is perpendicular to the front surface 2S of panel 2B. The back surface 2Q of panel 2A is perpendicular to the back surface 2T of panel 2B. The side surface 2R of panel 2A abuts the front surface 2S of panel 2B. As shown in FIG. 8B, the back surfaces 2Q and 2T are perpendicular to each other, forming a convex corner. One pin 4 protrudes from the back surface 2Q of panel 2A, and the other pin 4 protrudes from the back surface 2T of panel 2B.

[0055] The panel connector 33 includes a set of pins 4 and a connecting block 35 that engages with the set of pins 4. The connecting block 35 has a block body 36 that can abut against the back surfaces 2Q and 2T that are perpendicular to each other in the form of an external corner. Like the connecting block 5, the connecting block 35 has a first groove 7, a second groove 8, a first seating groove 9, and a second seating groove 10. The connecting block 25 has a bridge 41 that straddles the first groove 7 and the first seating groove 9 to connect the edges of the block bodies 36 that face each other across the first groove 7, and that straddles the second groove 8 and the second seating groove 10 to connect the edges of the block bodies 36 that face each other across the second groove 8.

[0056] 8A and 8B, the wall surface 36D of the block body 36 is pressed against one of the pins 4, and the panel 2A is pressed against the panel 2B. The panel connector 33 presses the side surface 2R of the panel 2A against the surface 2S of the panel 2B.

[0057] [Disclosure items] Each of the following sections discloses a preferred embodiment.

[0058] [Item 1] A formwork panel connector that connects a first panel and a second panel of a concrete formwork, a first pin fitted into a first hole formed in the first panel and protruding from the first panel; a second pin fitted into a second hole formed in the second panel and protruding from the second panel; and, a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the connecting block connecting the first panel and the second panel by engaging the first pin with the first engaging recess and the second pin with the second engaging recess; A formwork panel connector comprising:

[0059] [Item 2] Item 2. The formwork panel connector according to item 1, wherein the first pin has an insertion portion that fits into the first hole, an engagement portion that protrudes from the first panel and engages with the first engagement recess, and a head that prevents the engagement portion that engages with the first engagement recess from coming out of the first engagement recess.

[0060] [Item 3] 3. The formwork panel connector according to item 2, wherein the first pin has a protrusion that protrudes from the outer peripheral surface of the insertion portion and engages with the first hole.

[0061] [Item 4] the first engagement recess is a first groove, and the second engagement recess is a second groove extending along the first groove, 4. The formwork panel connector according to any one of items 1 to 3, wherein the left-right width Wg between the outer wall surface of the first groove and the outer wall surface of the second groove gradually decreases from the openings of the first groove and the second groove toward the back.

[0062] [Item 5] the first groove extends in the longitudinal direction to an end of the connecting block and opens at the end of the connecting block; Item 5. The formwork panel connector according to item 4, having a bridge that connects one edge and the other edge of the connecting block that are spaced apart in the width direction of the first groove so that the first pin can pass through.

[0063] [Item 6] A first panel, a second panel connected to the first panel, and a form panel connector connecting the first panel and the second panel, The formwork panel connector is a first pin fitted into a first hole formed in the first panel and protruding from the first panel; a second pin fitted into a second hole formed in the second panel and protruding from the second panel; and, a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the connecting block connecting the first panel and the second panel by engaging the first pin with the first engaging recess and the second pin with the second engaging recess; Equipped with The concrete formwork, wherein the first hole in the first panel is a blind hole.

[0064] [Item 7] A method for connecting concrete form panels, comprising: connecting a first panel and a second panel with a form panel connector including a first pin, a second pin, and a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the first panel has a first hole into which the first pin can be fitted, and the first pin is fitted into the first hole, causing the first pin to protrude from the first panel; the second panel has a second hole into which the second pin can be fitted, and the second pin is fitted into the second hole, causing the second pin to protrude from the second panel; A form panel connecting method, comprising: engaging the first pin with the first engagement recess and engaging the second pin with the second engagement recess, thereby connecting the first panel and the second panel with the connecting block.

[0065] [Item 8] A formwork panel connector that connects a first panel and a second panel of a concrete formwork, a first engagement protrusion protruding from the first panel; a second engagement protrusion protruding from the second panel; and, a connecting block having a first groove engageable with the first engaging protrusion and a second groove extending along the first groove and engageable with the second engaging protrusion, the connecting block connecting the first panel and the second panel by engaging the first engaging protrusion with the first groove and the second engaging protrusion with the second groove; A formwork panel connector in which the left-right width Wg between the outer wall surface of the first groove and the outer wall surface of the second groove gradually decreases from the openings of the first groove and the second groove toward the back.

[0066] [Item 9] the first groove extends in the longitudinal direction to an end of the connecting block and opens at the end of the connecting block; Item 9. The formwork panel connector according to item 8, having a bridge that connects one edge and the other edge of the connecting blocks that are spaced apart in the width direction of the first groove so that the first engaging protrusion can pass through. [Item 10] A method for connecting concrete formwork panels to connect a first panel and a second panel, comprising: The first panel from which the first engaging protrusion protrudes and the second panel from which the second engaging protrusion protrudes are brought into contact with each other, a connecting block having a first groove engageable with the first engaging protrusion and a second groove extending along the first groove and engageable with the second engaging protrusion, wherein a left-right width Wg between an outer wall surface of the first groove and an outer wall surface of the second groove gradually decreases from the openings of the first groove and the second groove toward the back; A form panel connecting method, comprising: engaging the first engaging protrusion with the first groove and engaging the second engaging protrusion with the second groove to connect the first panel and the second panel with the connecting block. [Industrial Applicability]

[0067] The form panel connectors described above are widely applicable to concrete formwork. [Explanation of symbols]

[0068] 1. Formwork (concrete formwork) 2 panels (first panel, second panel) 3. Panel connector (formwork panel connector) 4 pins (first pin, second pin) 4A...Head 4B...Engagement part 4C Insertion section 4D...protrusion 4E...Outer surface 6D, 6F...wall 5. Connecting block 7...First groove (first engagement recess) 7A, 8A...Aperture 8...Second groove (second engagement recess) 11. Bridge 12···Kong

Claims

1. A formwork panel connector that connects a first panel and a second panel of a concrete formwork, a first pin fitted into a first hole formed in the first panel and protruding from the first panel; a second pin fitted into a second hole formed in the second panel and protruding from the second panel; and, a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the connecting block connecting the first panel and the second panel by engaging the first pin with the first engaging recess and the second pin with the second engaging recess; A formwork panel connector comprising:

2. 2. The formwork panel connector according to claim 1, wherein the first pin has an insertion portion that fits into the first hole, an engagement portion that protrudes from the first panel and engages with the first engagement recess, and a head that prevents the engagement portion engaged with the first engagement recess from coming out of the first engagement recess.

3. The formwork panel connector according to claim 2 , wherein the first pin has a protrusion that protrudes from an outer peripheral surface of the insertion portion and engages with the first hole.

4. the first engagement recess is a first groove, and the second engagement recess is a second groove extending along the first groove, The formwork panel connector according to claim 1 or 2, wherein the left-right width Wg between the outer wall surface of the first groove and the outer wall surface of the second groove gradually decreases from the openings of the first groove and the second groove toward the back.

5. the first groove extends in the longitudinal direction to an end of the connecting block and opens at the end of the connecting block; 5. The formwork panel connector according to claim 4, further comprising a bridge connecting one edge and the other edge of the connecting blocks spaced apart in the width direction of the first groove so that the first pin can pass through.

6. A first panel, a second panel connected to the first panel, and a form panel connector connecting the first panel and the second panel, The formwork panel connector is a first pin fitted into a first hole formed in the first panel and protruding from the first panel; a second pin fitted into a second hole formed in the second panel and protruding from the second panel; and, a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the connecting block connecting the first panel and the second panel by engaging the first pin with the first engaging recess and the second pin with the second engaging recess; Equipped with The concrete formwork, wherein the first hole in the first panel is a blind hole.

7. A method for connecting panels of a concrete formwork, in which a first panel and a second panel are connected with a formwork panel connector including a first pin, a second pin, and a connecting block having a first engaging recess engageable with the first pin and a second engaging recess engageable with the second pin, the first panel has a first hole into which the first pin can be fitted, and the first pin is fitted into the first hole, causing the first pin to protrude from the first panel; the second panel has a second hole into which the second pin can be fitted, and the second pin is fitted into the second hole, causing the second pin to protrude from the second panel; A form panel connecting method, comprising: engaging the first pin with the first engagement recess and engaging the second pin with the second engagement recess, thereby connecting the first panel and the second panel with the connecting block.

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