CN209774923U - A kind of CLT board and connecting device - Google Patents

Abstract

the utility model discloses a CLT board and connecting device belongs to the building material field. The CLT board includes: longitudinal laminate; transverse laminate; and the supporting plate is positioned between the longitudinal laminate and the transverse laminate and comprises a hard frame and a reinforcing plate, and the hard frame is arranged on the peripheral side of the reinforcing plate. The connecting device comprises a connecting piece and a fastener, wherein the connecting piece comprises a baffle and a connecting plate, the connecting plate is vertically arranged on the baffle, the fastener and the baffle are located on two sides of a CLT plate, and the fastener is used for connecting a locking connecting plate. The utility model discloses a CLT board passes through the stereoplasm frame of backup pad, can increase the compressive strength of CLT flange edge part, avoids because CLT flange edge part pressurized and the easy problem of becoming deformed and becoming invalid under the effect of other external load. The utility model also provides a connecting device for be used for connecting the CLT board passes the clearance between two CLT boards through the connecting plate, and the depth of parallelism of two CLT boards can be guaranteed to the plane degree of baffle, relies on the fastener to lock the connecting piece, and is simple and convenient, and construction cycle is short.

Description

A kind of CLT board and connecting device

technical field

The invention relates to the field of building materials, in particular to a CLT board and a connecting device.

Background technique

Orthogonal laminated timber (CLT, also known as "cross-laminated timber") is usually a group of boards with a certain thickness that are glued together or nailed/tenon-jointed perpendicularly to each other in the wood grain direction of adjacent layers. As for the board, its surface board and inner board are symmetrically arranged on both sides of the central layer or board core. The end length of each layer of boards is mostly joined by finger joints or nails, the widening of side panels is mainly done by glue joints or nail joints, and the layers are mostly joined by glue joints.

CLT can be widely used in walls, floors and roofs of civil buildings and commercial high-rise buildings, and plays a dual role of building enclosure and load-bearing in buildings. Buildings using CLT boards have the advantages of high degree of factory customization/prefabrication, simple on-site assembly, high efficiency, environmental protection, earthquake resistance, and fire prevention.

However, when CLT is applied to the walls, floors and roofs of wooden structures, there are shortcomings due to its excessive mass, sound insulation and thermal insulation properties that need to be improved. Especially when it bears the wall, it mainly bears the vertical load. When it is applied to high-rise buildings, the vertical load requirements of the CLT board are relatively high, and the wood board can bear high shear strength along the direction perpendicular to the wood grain. And along the grain direction can bear higher compressive strength. However, the existing CLT boards often can only use the characteristics of high shear strength or high compressive strength, without effectively utilizing the two, resulting in relatively large limitations in the application of CLT boards in high-rise buildings. Moreover, for the plate members stretched by the post-tensioning method, the two ends of the plate members are not only locally compressed, but also have tensile stress around the compression area. The stress situation is complicated and it is easy to cause bending deformation. Adverse. Moreover, under the influence of long-term environmental factors, the edge loss of wood is serious, and even cracks. More importantly, wood will creep under the long-term action of external load, which will change the boundary conditions of unbonded prestressed tendons and reduce the loss of unbonded prestressed tendons. Prestressing in bonded prestressing tendons.

In addition, in the prior art, when splicing two wood boards, it is mainly through glue or nailing, but in the application of high-rise buildings, the strength of the glue joint cannot meet the requirements of use, and the strength of the nail joint is not high. Moreover, it is cumbersome to adjust the parallelism between two adjacent boards during construction, resulting in a longer construction period.

Contents of the invention

The present invention provides a CLT board, which can solve the problem that the CLT board in the prior art cannot effectively utilize both compressive strength and shear strength to improve the application scene of the CLT board.

The present invention also provides a connection device for connecting CLT boards, which can solve the problems of low connection strength and cross parallelism of the connection device in the prior art.

A CLT board, comprising:

longitudinal laminates;

transverse laminates; and,

A support plate is located between the longitudinal laminate and the transverse laminate, the support plate includes a rigid frame and a reinforcing plate, and the rigid frame is arranged on a peripheral side of the reinforcing plate.

More preferably, the rigid frame is made of polycarbonate material.

More preferably, the reinforcing plate is made of a two-dimensional negative Poisson's ratio structural material.

More preferably, it also includes a balsa core board, the balsa core board has three layers, the support board is arranged between two adjacent layers of the balsa core board, and the balsa core board and the The supporting boards are arranged between the longitudinal laminates and between the balsa core board and the transverse laminates.

A connecting device for connecting CLT boards, comprising a connecting piece and a fastener, the connecting piece includes a baffle and a connecting plate, the connecting plate is vertically arranged on the baffle, the fastener and the baffle The boards are located on both sides of the CLT board, and the fasteners are used to connect and lock the connecting boards.

More preferably, a locking groove is opened on the connecting plate, and the fastener passes through the locking groove to lock the connecting plate.

More preferably, the upper end surface of the fastener is an inclined surface.

More preferably, a first locking tooth platform is provided on the inclined surface, and a second locking tooth platform matching with the first locking tooth platform is provided on the upper end surface of the locking groove.

More preferably, the bottom surface of the fastener is provided with a friction tooth platform, and the friction tooth platform is arranged obliquely toward the higher side of the inclined surface for contacting with the CLT plate and generating frictional resistance.

More preferably, a first connection hole is opened on the baffle, a second connection hole is opened on the fastener corresponding to the first connection hole, and the first connection hole and the second connection hole connected by fasteners.

The invention provides a CLT board, which can increase the compressive strength of the edge part of the CLT board through the hard frame of the supporting board, and avoid the problem that the edge part of the CLT board is easily deformed and failed due to compression and other external loads.

The present invention also provides a connection device for connecting CLT boards, through which the connecting board passes through the gap between two CLT boards, the flatness of the baffle can ensure the parallelism of the two CLT boards, and the connection is made by fasteners. The parts are locked, simple and convenient, and the construction period is short.

Description of drawings

Fig. 1 is the structural representation of the embodiment one of a kind of CLT board provided by the present invention;

Fig. 2 is the structural representation of the embodiment two of a kind of CLT board provided by the present invention;

Fig. 3 is the schematic diagram of the installation structure of a kind of CLT plate provided by the present invention;

Fig. 4 is the schematic cross-sectional structure diagram of Fig. 3;

Fig. 5 is a partial enlarged view of place A in Fig. 4;

Fig. 6 is the top view of Fig. 3;

Fig. 7 is a schematic structural view of the fastener in Fig. 3;

FIG. 8 is a schematic structural diagram of the connector in FIG. 3 .

Explanation of reference signs:

00, CLT plate, 11, connector, 111, baffle plate, 1111, first connecting hole, 1112, third connecting hole, 112, connecting plate, 1121, lock groove, 12, fastener, 121, first lock Gear stopper, 122, second connection hole, 123, fourth connection hole, 124, friction gear stand, 20, hard frame, 21, reinforcement plate, 30, transverse laminate, 31, longitudinal laminate, 40, light wood core board.

Detailed ways

A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

Embodiment one:

As shown in Figure 1, a CLT board 00 provided by an embodiment of the present invention includes:

longitudinal laminates 31;

Transverse laminate 30; wherein, the longitudinal laminate 31 and the transverse laminate 30 all adopt common thick plates in the prior art, and the intersecting arrangement of the longitudinal laminate 31 and the transverse laminate 30 can make the CLT board 00 in terms of tensile strength and shear resistance In terms of strength, better performance can be guaranteed. In this embodiment, a support plate is also provided between the longitudinal laminate 31 and the transverse laminate 30. The support plate includes a hard frame 20 and a reinforcement plate 21. As can be seen from FIG. 1, the rigid frame 20 is arranged on the reinforcement The peripheral side of the plate 21. The shape of the hard frame 20 should be compatible with the edge shape of the CLT board 00 .

Among them, the hard frame 20 is made of polycarbonate material: polycarbonate (PC) has high toughness and rigidity, the impact strength is 600~900J/m, the bending modulus of PC can reach more than 2400MPa, and the resin can be processed Made into large rigid products. Below 100°C, the creep rate under load is very low. Therefore, it can provide higher support strength. CLT board 00 has higher strength in the middle part, but for the edge part, due to the relatively concentrated stress, the deformation resistance of wood is poor, and it is easy to deform and fail under the action of external complex loads. , even cracked. The rigid frame 20 made of polycarbonate can provide better support, so that the edge of the CLT board 00 will not undergo excessive deformation under the action of external pressure, thereby reducing the risk of edge failure.

The reinforcing plate 21 is made of a two-dimensional negative Poisson's ratio structural material. When the negative Poisson's ratio material is stretched, the material expands laterally within the elastic range; when compressed, the material shrinks laterally. When CLT board 00 is in use, generally speaking, its multiple edges will be connected by connecting devices. Due to the characteristics of CLT board 00 itself, the compressive strength is high along the direction of the wood grain texture, and perpendicular to the wood grain texture. The shear strength in the direction is high, but when it is actually loaded, such as when it is used as a wall, it often receives more vertical shear force. To improve the longitudinal shear resistance when used as a wall, but when the wood receives the longitudinal shear force, it is squeezed to both sides in the transverse direction instead of pressure, so the compressive properties of the plank in the transverse direction at this time Doesn't work. The reinforcing plate 21 is made of a negative Poisson’s ratio material, and is bonded between the longitudinal laminate 31 and the transverse laminate 30 by an adhesive. Internal contraction, thereby pulling the wood to shrink and squeeze inward, can make full use of the shear strength and compressive strength of the longitudinal laminate 31 and the transverse laminate 30, making its mechanical properties more excellent and applicable scenarios improved.

Embodiment two:

The traditional CLT board 00 is too heavy, and the sound insulation and thermal insulation performance is poor. Therefore in this embodiment, as shown in Figure 2, also include balsa core board 40, and balsa core board 40 is three layers, is provided with support board between adjacent two layers of balsa core boards 40, and balsa core board 40 Support plates are provided between the board 40 and the longitudinal plies 31 and between the balsa core 40 and the transverse plies 30 . Balsa wood is a tree species with the smallest density in the world (0.137g/cm3, only about 1/4 of the density of commonly used tree species in construction), and it grows extremely fast, but it cannot be directly applied to wood structure buildings due to its low strength. However, its light and porous nature makes it very suitable for use as a sound insulation and insulation material. Therefore, if balsa wood is used as the CLT core board, the excellent mechanical properties and structural characteristics of CLT can meet the prefabricated wood structure building, and at the same time, the mass of the CLT large board can be reduced, and its thermal insulation and sound insulation performance can be greatly improved. Utilizing the characteristics of high density of longitudinal laminates 31 and transverse laminates 30 and low density of balsa core board 40, the high-frequency human voice of "air sound transmission" can be isolated. Because of its natural low thermal conductivity, it can greatly improve the thermal insulation performance of CLT board 00.

Embodiment three:

A connecting device for connecting a CLT board 00, as shown in Figures 3 to 8, includes a connecting piece 11 and a fastener 12, the connecting piece 11 includes a baffle 111 and a connecting plate 112, and the connecting plate 112 is vertically arranged on the baffle 111 , the fastener 12 and the baffle 111 are located on both sides of the CLT board 00 , and the fastener 12 is used to connect the locking connecting plate 112 . A locking slot 1121 is defined on the connecting plate 112 , and the fastener 12 passes through the locking slot 1121 to lock the connecting plate 112 . When the fastener 12 passes through the locking groove 1121, the bottom surface of the fastener 12 is in close contact with the surface of the CLT board 00, and the baffle 111 is in close contact with the surface of the CLT board 00 on the other side. Clamping" can ensure better parallelism when the CLT board 00 is connected, so that the same side of the two connected CLT boards 00 are on the same surface, which greatly reduces the connection difficulty and adjustment time.

In order to facilitate construction, as shown in Figure 4 and Figure 5, the upper end surface of the fastener 12 is an inclined surface. The inclined surface can be squeezed with the lock groove 1121, inserted from the lower end of the fastener 12, and then the fastener 12 is gradually pressed, so that the fastener 12 is squeezed into the lock groove 1121, and the fastener 12 is connected The extrusion force of the board 112 forces the same-side surfaces of the two CLT boards 00 to be on the same surface.

As shown in Figure 5, in order to prevent the buckle 12 from being pushed back into the locking groove 1121 and retreat due to the action of the load, a first locking gear stage 121 is provided on the inclined surface, and a first locking tooth platform 121 is provided on the upper end surface of the locking groove. There is a second locking tooth stage matched with the first locking tooth stage 121 . The first locking tooth stage 121 and the second locking tooth stage are meshed. At the initial stage of the assembly of the two, because they have not yet engaged, it is convenient for the extrusion of the fastener 12. When the first locking tooth stage 121 and the second locking tooth stage are squeezed to After the gear stoppers are engaged, the second locking gear stand exerts force on the first locking gear stand 121 to prevent the first locking gear stand 121 from retreating, thereby avoiding the loosening of the two CLT plates 00 .

In order to further improve the locking force, a friction tooth platform 124 is provided on the bottom surface of the fastener 12 , and the friction tooth platform 124 is inclined toward the side with a higher inclined surface for contacting with the CLT plate 00 and generating frictional resistance. The main purpose of the connection device is to prevent the two CLT boards 00 from being separated, and when the two CLT boards 00 tend to be separated, one of the CLT boards 00 moves to one side along the direction away from the connecting board 112, and the obliquely arranged The friction tooth platform 124 can provide higher frictional force, and at the same time, when squeezed, the friction tooth platform 124 will be partially squeezed into the longitudinal laminate 31 and/or the transverse laminate 30, which can form a relatively large resistance, so when in use According to this characteristic, the installation direction can be adjusted according to the possible movement direction of the CLT board 00 in actual use, thereby improving the safety factor of the connection device.

Further, as shown in FIG. 4 , a first connecting hole 1111 is opened on the baffle 111 , and a second connecting hole 122 is opened on the fastener 12 corresponding to the first connecting hole 1111 , and the first connecting hole 1111 is connected to the second connecting hole 1111 . The holes 122 are connected by fasteners. The stability of the connection can be further improved. Of course, as shown in Figure 7 and Figure 8, the first connecting hole 1111 and the third connecting hole 1112 can be opened symmetrically on both sides of the connecting plate 112, and the first connecting hole 1111 and the third connecting hole 1112 are correspondingly formed on the fastener 12. A second connecting hole 122 and a fourth connecting hole 123 are respectively opened at the positions of the connecting holes 1112 , and after installation, they are fastened and connected by bolts, which can further improve the connection strength.

The above disclosures are only a few specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (10)

1. A CLT plate, characterized in that: comprising: longitudinal laminates; transverse laminates; and, A support plate is located between the longitudinal laminate and the transverse laminate, the support plate includes a rigid frame and a reinforcing plate, and the rigid frame is arranged on a peripheral side of the reinforcing plate. 2. A CLT board according to claim 1, characterized in that: said rigid frame is made of polycarbonate material. 3. A CLT plate according to claim 1 or 2, characterized in that: the reinforcing plate is made of a two-dimensional negative Poisson's ratio structural material. 4. A kind of CLT board according to claim 3, is characterized in that: also comprise balsa core board, described balsa core board is three layers, is provided with between two adjacent layers of described balsa core boards The supporting board is provided between the balsa core board and the longitudinal laminate and between the balsa core board and the transverse laminate. 5. A connecting device for connecting the CLT board according to any one of claims 1-4, characterized in that: it includes a connecting piece and a fastener, the connecting piece includes a baffle plate and a connecting plate, and the connecting piece The plate is vertically arranged on the baffle, the fastener and the baffle are located on both sides of the CLT plate, and the fastener is used to connect and lock the connecting plate. 6 . The connecting device according to claim 5 , wherein a locking groove is opened on the connecting plate, and the fastener passes through the locking groove to lock the connecting plate. 7 . 7. The connection device according to claim 6, characterized in that: the upper end surface of the fastener is an inclined surface. 8. The connecting device according to claim 7, characterized in that: the inclined surface is provided with a first locking gear stage, and the upper end surface of the locking groove is provided with a Matching second locking gear stage. 9. The connecting device according to claim 7, characterized in that: the bottom surface of the fastener is provided with a friction tooth platform, and the friction tooth platform is arranged obliquely toward the higher side of the inclined surface for contact with the The CLT plate contacts and generates frictional resistance. 10. The connecting device according to any one of claims 5-9, wherein a first connecting hole is opened on the baffle, and a second connecting hole is opened on the fastener corresponding to the first connecting hole. Two connection holes, the first connection hole and the second connection hole are connected by fasteners.