Concrete floor expansion joint supporting device

Abstract

The utility model provides a concrete terrace expansion joint supporting device which comprises a first supporting frame and a second supporting frame which are oppositely arranged, clamping rings and limiting column sets are alternately fixed to the first supporting frame and the second supporting frame in the extending direction, and each limiting column set comprises two limiting columns arranged in parallel; the clamping ring on the first supporting frame and the limiting column set on the second supporting frame are oppositely arranged, and the limiting column set on the first supporting frame and the clamping ring on the second supporting frame are oppositely arranged. Each pin plate is arranged to be in an isosceles trapezoid shape, limiting holes are oppositely formed in the two waists, close to the lower bottom, of each pin plate, the two limiting columns in the same limiting column set on the first supporting frame or the second supporting frame penetrate through the two limiting holes correspondingly, and one end of the upper bottom of each pin plate is inserted into a clamping ring opposite to the corresponding limiting column set and can move along the clamping ring; the longitudinal limiting piece is detachably connected with the first supporting frame or the second supporting frame or the limiting column and abuts against the end, provided with the limiting hole, of the pin plate to limit movement of the pin plate in the longitudinal direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to expansion joint technical field, concretely relates to a concrete ground terrace expansion joint support device. BACKGROUND

[0002] The concrete ground terrace expansion joint refers to the gap arranged on the concrete ground surface, is mainly used for coping with the shrinkage of concrete caused by temperature, humidity change and other factors, makes the concrete ground terrace crack along the expansion joint, prevents other irregular cracks. In actual production, before pouring the ground terrace, the support device is placed on the concrete base layer at the expected position of the expansion joint, the support device is composed of the middle pin plate and the support frame on both sides of the pin plate, wherein the support frame on one side is welded with one end of the pin plate, and the support frame on the other side is movably connected with the pin plate. The extension direction of the support device is the same as the extension direction of the designed expansion joint, and the extension direction of the pin plate is the same as the cracking width direction of the expansion joint. After the support device is placed, the concrete ground terrace is poured, and the expansion joint is manually opened at the position corresponding to the support device when the concrete ground terrace is coagulated to a certain degree. When the temperature, humidity and other factors change, the expansion joint is separated to both sides by the shrinkage force. During the cracking process of the expansion joint, the pin plate is guided to crack regularly along the pin plate, and irregular cracks are not formed.

[0003] The existing support device is welded with the support frame at one end of the pin plate, which puts forward high welding requirements for the technical personnel, and after welding, the whole support device occupies a large space, is not convenient for transportation, and is easy to be extruded and deformed during transportation. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a concrete ground terrace expansion joint support device to solve the above technical problems.

[0005] The concrete ground terrace expansion joint support device provided by the utility model comprises:

[0006] The first support frame and the second support frame are oppositely arranged, a snap ring and a limiting column group are alternately fixed on the extension direction of the first support frame and the second support frame respectively, each limiting column group comprises two limiting columns which are arranged in parallel, the snap ring on the first support frame is oppositely arranged with the limiting column group on the second support frame, and the limiting column group on the first support frame is oppositely arranged with the snap ring on the second support frame;

[0007] A plurality of pin plates are arranged, each pin plate is arranged in the shape of an isosceles trapezoid, limiting holes are oppositely arranged on the two waists close to the lower bottom of the pin plate, two limiting columns in the same limiting column group on the first support frame or the second support frame respectively penetrate two limiting holes, one end of the upper bottom of the pin plate is inserted into the snap ring oppositely arranged with the limiting column group and can move along the snap ring.

[0008] A longitudinal limiting piece is detachably connected with the first support frame, the second support frame or the limiting column, and abuts against one end of the limiting hole of the pin plate to limit the movement of the pin plate in the longitudinal direction.

[0009] Optionally, the longitudinal limiting piece is provided as a buckle, a first end of the buckle is clamped with the first support frame or the second support frame, and a second end of the buckle abuts against one side of the limiting hole of the pin plate.

[0010] Optionally, the longitudinal limiting piece is provided as a self-locking card, the self-locking card is penetrated by a self-locking hole, the inner diameter of the self-locking hole is smaller than the outer diameter of the limiting column, the limiting column is inserted into the self-locking hole and is in interference connection with the self-locking card, and the self-locking card abuts against the pin plate.

[0011] Optionally, the limiting column is provided with an external thread; the longitudinal limiting piece comprises a gasket and a nut, the limiting column penetrates the gasket, the gasket abuts against the pin plate, and the nut is in threaded connection with the limiting column and abuts against the gasket.

[0012] Optionally, the first support frame and the second support frame each comprise:

[0013] parallelly arranged upper edge beams and lower edge beams, the clamping ring and the limiting column group are respectively fixed to the upper edge beams;

[0014] a connecting beam, opposite ends of the connecting beam are respectively connected with the upper edge beams and the lower edge beams.

[0015] Optionally, the concrete terrace expansion joint support device further comprises a plastic support rod, opposite ends of the plastic support rod are respectively movably connected with the upper edge beams of the first support frame and the second support frame.

[0016] Optionally, the plastic support rod comprises a main rod and a sleeve ring fixedly connected with opposite ends of the main rod, the sleeve ring is sleeved on the upper edge beams and is movably connected with the upper edge beams.

[0017] Optionally, the surface of the pin plate is sleeved with a heat-shrinkable film sleeve.

[0018] Optionally, the turning part at one end of the upper bottom of the pin plate is provided with a chamfer.

[0019] Optionally, the included angle between the upper bottom and the waist of the pin plate ranges from 91 to 100 degrees.

[0020] Compared with the prior art, the above technical scheme of the utility model has at least the following beneficial effects:

[0021] The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.

[0023] Figure 2 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process. Figure 1 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.

[0024] Figure 3 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process. Figure 1 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.

[0025] Figure 4 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.

[0026] REFERENCE SIGNS

[0027] 1: first support frame; 2: second support frame; 3: pin plate; 31: limiting hole; 4: longitudinal limiting member; 5: clasp; 6: limiting column; 7: upper edge beam; 8: lower edge beam; 9: connecting beam; 10: plastic support rod; 11: heat shrink film sleeve. DETAILED DESCRIPTION

[0028] The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.

[0029] Figure 1 The support device for the concrete floor expansion joint is characterized in that the fixed end of the pin plate and the first support frame and the second support frame is no longer connected by welding, but is horizontally limited by the limiting column and the limiting hole, and is connected in a detachable mode by the longitudinal limiting member, so that the support device is convenient to assemble, the staff can quickly assemble on site, the components of the support device do not need to be welded and then transported integrally, the components are convenient to stack, transportation is facilitated, the support device occupies a small space, and extrusion deformation is not caused in the transportation process.Figure 2 As Figure 1 The connecting relationship between the pin plate and the first support frame and the second support frame of the concrete floor expansion joint support device is shown in the exploded view, Figure 3 As Figure 1 The side view of the concrete floor expansion joint support device arranged in the concrete floor is shown. As Figures 1-3 The concrete floor expansion joint support device includes a first support frame 1 and a second support frame 2 arranged opposite to each other, a plurality of pin plates 3 and a longitudinal limiting piece 4.

[0030] The first support frame 1 and the second support frame 2 are respectively alternately fixed with a snap ring 5 and a limiting column group in the extending direction. Each limiting column group includes two limiting columns 6 arranged in parallel. The snap ring 5 on the first support frame 1 is arranged opposite to the limiting column group on the second support frame 2, and the limiting column group on the first support frame 1 is arranged opposite to the snap ring 5 on the second support frame 2. Each pin plate 3 is arranged as an isosceles trapezoid. The pin plate 3 is provided with a limiting hole 31 opposite to each other on the two waists close to the lower base. The two limiting columns 6 in the same limiting column group on the first support frame 1 or the second support frame 2 respectively penetrate the two limiting holes 31. The upper base end of the pin plate 3 is inserted into the snap ring 5 arranged opposite to the limiting column group and can move along the snap ring 5. The longitudinal limiting piece 4 is detachably connected with the first support frame 1, the second support frame 2 or the limiting column 6 and abuts against one end of the limiting hole 31 of the pin plate 3 to limit the movement of the pin plate 3 in the longitudinal direction.

[0031] The first support frame 1 and the second support frame 2 are alternately fixed with the clamping ring 5 and the limiting column group respectively, the lower base of the trapezoidal pin plate 3 is connected with the limiting column group, therefore, on the same side support frame, the arrangement of the trapezoidal pin plate 3 is arranged alternately on the upper base and the lower base. When in use, one end of the pin plate 3 provided with the limiting hole 31, that is, the lower base of the trapezoidal pin plate 3 is corresponded to the position of one limiting column group on the first support frame 1 or the second support frame 2, the limiting column 6 is inserted into the limiting hole 31, the horizontal limiting of the lower base of the trapezoidal pin plate 3 is realized, and the longitudinal limiting member 4 is abutted against the side surface of the lower base of the trapezoidal pin plate 3 away from the first support frame 1 and the second support frame 2, the longitudinal limiting of the trapezoidal pin plate 3 is realized, so that the horizontal and longitudinal limiting of the lower base of the trapezoidal pin plate 3 is realized. Then the upper base of the trapezoidal pin plate 3 is inserted into the clamping ring 5 on the opposite support frame corresponding to the limiting column group. Finally, according to the design requirements of the drawing, the inclination angle of the first support frame 1 and the second support frame 2 and the spacing between the two and other parameters are adjusted, and the assembly of the concrete pavement expansion joint support device is completed. Before pouring the concrete pavement, the position and the extending direction of the expansion joint are determined on the concrete base, the assembled support device is placed on the position, the extending direction of the first support frame 1 and the second support frame 2 is the same as the extending direction of the expansion joint, and the extending direction of the pin plate 3 is the same as the width direction of the expansion joint. After pouring the concrete pavement and solidifying the pavement to a certain degree, the crack is cut at the preset expansion joint position, under the action of the shrinkage force, the concrete on both sides of the crack is cracked along the expansion joint, and in the cracking process, because the concrete pavement is poured on the support device, the concrete on both sides of the crack is cracked along the extending direction of the pin plate 3, and there is no height difference between the two sides of the crack, and in the cracking process of the concrete, the lower pin plate 3 is driven to move in the same direction. The lower base of the trapezoidal pin plate 3 is fixedly connected with the support frame under the cooperation of the limiting hole 31 and the limiting column 6 and the double action of the longitudinal limiting member 4, and the upper base is inserted into the clamping ring 5 and can move along the clamping ring 5, so that when the concrete drives the pin plate 3 to move, the pin plate 3 moves along the clamping ring 5 as a whole.

[0032] The fixed end of the pin plate 3 and the first support frame 1 and the second support frame 2 is no longer welded, but is connected by the limiting column 6 and the limiting hole 31 for horizontal limiting, and the longitudinal limiting member 4 for longitudinal limiting, so that the support device is convenient to assemble, the staff can quickly assemble on site, and the parts of the support device do not need to be welded and transported as a whole, so that the parts can be stacked, transported conveniently, occupy small space and will not be extruded and deformed during transportation.

[0033] As Figures 1-3As shown, in this embodiment, the first support frame 1 and the second support frame 2 are of equal height, with the height controlled within 1 / 3 to 2 / 3 of the concrete thickness, and are arranged on both sides at a distance. Each pin plate 3 is an isosceles trapezoid, with a narrower upper base. This narrower upper base allows the pin plate 3 to easily penetrate the concrete and move when the overlying concrete floor cracks along the expansion joint. The pin plate 3 serves to bear the deflection of the expansion joint and guide the expansion, dispersing the forces in all directions. Multiple trapezoidal pin plates 3 are erected parallel to each other on the support frames on both sides, with the upper and lower bases of the trapezoidal pin plates 3 staggered on the same side support frame, ensuring uniform stress on the first support frame 1 and the second support frame 2, and uniform stress when bearing the overlying concrete floor. The lower base of each trapezoidal pin plate 3 is connected to the limiting post 6 on the support frames on both sides via a limiting hole 31, and is constrained in the longitudinal direction by the longitudinal limiting member 4. In this embodiment, the upper base length of the trapezoidal pin plate 3 is 35cm, the lower base length is 70cm, the inner diameter of the limiting hole 31 is 2.75cm, and the distance between the center of the limiting hole 31 and the lower base of the trapezoidal pin plate 3 is 41cm. Depending on the actual application, the first support frame 1 and the second support frame 2 can adopt any support structure, as long as they can support the pin plate 3. The number of retaining rings 5 ​​and limiting post groups connected to the first support frame 1 and the second support frame 2 can be adjusted according to the preset number of pin plates 3. The specific dimensions of the pin plate 3 can be appropriately adjusted according to the force conditions. The longitudinal limiting member 4 can be of any structural form, as long as it can constrain the longitudinal movement of the pin plate 3.

[0034] Optionally, the longitudinal limiting member 4 is configured as a buckle, with the first end of the buckle engaging with the first support frame 1 or the second support frame 2, and the second end of the buckle abutting against the side of the pin plate 3 where the limiting hole 31 is opened.

[0035] like Figure 2 As shown, in this embodiment, the longitudinal limiting member 4 is a buckle. The lower end of the buckle is provided with a slot, which engages with the first support frame 1 or the second support frame 2 at the location of the limiting post 6. The upper end of the buckle is at the end where the limiting hole 31 is opened on the pin plate 3, that is, the end near the bottom of the pin plate 3, and abuts against the side surface of the pin plate 3 facing away from the first support frame 1 and the second support frame 2, thereby fixing the bottom end of the trapezoidal pin plate 3 to the first support frame 1 or the second support frame 2 to prevent it from moving longitudinally.

[0036] Optionally, the longitudinal limiting member 4 is configured as a self-locking card with a self-locking hole through it. The inner diameter of the self-locking hole is smaller than the outer diameter of the limiting post 6. The limiting post 6 is inserted into the self-locking hole and is interference-fitted with the self-locking card. The self-locking card abuts against the pin plate 3.

[0037] The free end of the limiting column 6 is exposed from the pin plate 3 by a certain height after penetrating the limiting hole 31 of the pin plate 3, the self-locking card is inserted into the free end of the limiting column 6, and the self-locking card is connected with the limiting column 6 by the external force, and the cross-sectional area of the self-locking card is large enough, so that the lower surface of the self-locking card can abut against the upper surface of the pin plate 3 after the self-locking card is connected with the limiting column 6 by the interference, and then the longitudinal movement of the pin plate 3 is restricted. The two limiting columns 6 in the same limiting column group are connected with the self-locking card by the interference respectively.

[0038] Optionally, the limiting column 6 is provided with external threads; the longitudinal limiting part 4 comprises a gasket and a nut, the limiting column 6 penetrates the gasket, and the gasket abuts against the pin plate 3, and the nut is threadedly connected with the limiting column 6 and abuts against the gasket.

[0039] In the embodiment, the limiting column 6 is provided with external threads, and the free end of the limiting column 6 is exposed from the pin plate 3 by a certain height after penetrating the limiting hole 31 of the pin plate 3. The gasket has a certain rigidity and a sufficient cross-sectional area, and is penetrated by a through hole, is aligned with the limiting column 6, is inserted into the free end of the limiting column 6, and is abutted against the upper surface of the pin plate 3, and then the nut is threadedly connected with the limiting column 6 until the nut is abutted against the gasket, so that the longitudinal movement of the pin plate 3 is limited.

[0040] Optionally, the first support frame 1 and the second support frame 2 each comprise parallel upper edge beams 7 and lower edge beams 8 and connecting beams 9, and the clamping ring 5 and the limiting column group are fixed to the upper edge beams 7; opposite ends of the connecting beam 9 are connected with the upper edge beam 7 and the lower edge beam 8 respectively.

[0041] As shown in Figure 1 and Figure 2 , the upper edge beams 7 and the lower edge beams 8 are arranged in parallel, and in order to maintain stability, the planes in which the upper edge beams 7 and the lower edge beams 8 are arranged are inclined at an angle of about 45° with the vertical plane. The connecting beam 9 connects the upper edge beam 7 and the lower edge beam 8, and can be any connecting structure as long as it can play a stable connecting role. In the embodiment, the connecting beam 9 is provided in two structural forms, one of which is perpendicular to the upper edge beam 7 and the lower edge beam 8 and extends upward at the upper edge beam 7, and the upward extending part of the connecting beam 9 constitutes the limiting column 6; the other connecting beam 9 is provided in the shape of “n”, and the two sides of the “n” are fixedly connected with the upper edge beam 7 and the lower edge beam 8 respectively, and the closed top end of the “n” encloses the clamping ring 5 with the upper edge beam 7, and one end of the upper base of the trapezoidal pin plate 3 is inserted into the clamping ring 5 and can move along the clamping ring 5.

[0042] Figure 4 The side view of the concrete terrace expansion joint support device according to another embodiment of the utility model is arranged in the concrete terrace. As shown in Figure 4 Optionally, the concrete terrace expansion joint support device further comprises a plastic support rod 10, and opposite ends of the plastic support rod 10 are movably connected with the upper edge beams 7 of the first support frame 1 and the second support frame 2 respectively.

[0043] The plastic support rod 10 can be provided in plurality and arranged at intervals between two adjacent pin plates 3. The plastic support rod 10 has a certain supporting strength, so that after the pouring of the concrete ground, the plastic support rod 10 can play a certain supporting role on the overlying concrete. At the same time, the plastic support rod 10 is made of plastic material and has limited strength. When the concrete on both sides of the expansion joint further cracks under the shrinkage force, the plastic support rod 10 is broken under stress when the concrete drives the pin plate 3 and the entire support device to shake or move, which will not affect the normal cracking of the expansion joint.

[0044] Optionally, the plastic support rod 10 includes a main rod and a sleeve ring fixedly connected to opposite ends of the main rod. The sleeve ring is sleeved on the upper edge beam 7 and movably connected with the upper edge beam 7. With the help of the sleeve ring, the movable connection between the plastic support rod 10 and the upper edge beams 7 on both sides can be conveniently achieved, and the plastic support rod 10 can be conveniently moved to the position requiring additional support.

[0045] Optionally, the pin plate 3 is sleeved with a heat shrinkable film sleeve 11. After pouring the concrete ground, the concrete may be combined with the surface of the pin plate 3 during the solidification process. When the concrete on both sides of the expansion joint further cracks under the shrinkage force, it cannot move to both sides relative to the pin plate 3. The pin plate 3 is sleeved with a heat shrinkable film sleeve 11, so that the heat shrinkable film sleeve 11 directly contacts the concrete and no combination occurs between them. Therefore, it is beneficial to the normal cracking of the expansion joint.

[0046] As shown in Figures 1-3 In the present embodiment, the heat shrinkable film sleeve 11 is sleeved on the upper base end of the trapezoidal pin plate 3.

[0047] Optionally, the turning portion of the upper base end of the pin plate 3 is provided with a chamfer. The chamfer is provided so that the upper base end with a smaller width can be more easily inserted into the adjacent concrete to move during the cracking and movement of the overlying concrete. The specific setting range of the chamfer is adjusted according to the actual situation.

[0048] Optionally, the included angle between the upper base and the waist of the pin plate 3 is in the range of 91-100°. If the included angle between the upper base and the waist of the trapezoidal pin plate 3 is too large, the resistance of the upper base end of the pin plate 3 to the adjacent concrete during the cracking of the expansion joint will increase, which is not conducive to the normal movement of the pin plate 3 during the cracking of the expansion joint. Setting the included angle in the above range helps to reduce the movement resistance of the pin plate 3. In the present embodiment, the included angle between the upper base and the waist of the pin plate 3 is 93°. According to the actual application situation, it can be appropriately adjusted, for example, to 92°, 95°, etc.

[0049] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A support device for expansion joints in concrete floors, characterized in that, The application relates to a support device for a concrete ground terrace expansion joint, which comprises the following parts: first and second support frames arranged oppositely, a clamping ring and a limiting column group being alternately fixed on the first and second support frames respectively, each limiting column group comprising two limiting columns arranged in parallel, the clamping ring on the first support frame being arranged oppositely to the limiting column group on the second support frame, and the limiting column group on the first support frame being arranged oppositely to the clamping ring on the second support frame; a plurality of pin plates, each pin plate being arranged in the shape of an isosceles trapezoid, limiting holes being oppositely arranged on two waists of the pin plate close to a lower base, two limiting columns in the same limiting column group on the first or second support frame penetrating through the two limiting holes respectively, and one end of an upper base of the pin plate being inserted into the clamping ring arranged oppositely to the limiting column group and being movable along the clamping ring; a longitudinal limiting member, which is detachably connected with the first and second support frames or the limiting columns and abuts against one end of the pin plate provided with the limiting holes, so as to limit the movement of the pin plate in the longitudinal direction.

2. The support device for the concrete ground terrace expansion joint according to claim 1, wherein: the longitudinal limiting member is arranged in the shape of a buckle, a first end of the buckle being clamped with the first or second support frame, and a second end of the buckle abutting against one side of the pin plate provided with the limiting holes.

3. The support device for the concrete ground terrace expansion joint according to claim 1, wherein: the longitudinal limiting member is arranged in the shape of a self-locking card, a self-locking hole being arranged through the self-locking card, the inner diameter of the self-locking hole being smaller than the outer diameter of the limiting column, the limiting column being inserted into the self-locking hole and being connected with the self-locking card in an interference fit, and the self-locking card abutting against the pin plate.

4. The support device for the concrete ground terrace expansion joint according to claim 1, wherein: the limiting column is provided with an external thread; the longitudinal limiting member comprises a gasket and a nut, the limiting column penetrating through the gasket, the gasket abutting against the pin plate, and the nut being threadedly connected with the limiting column and abutting against the gasket.

5. The support device for expansion joints in concrete floors according to any of claims 1-4, characterized in that, The first and second support frames each comprise: upper and lower edge beams arranged in parallel, the clamping ring and the limiting column group being fixed to the upper edge beam respectively; a connecting beam, opposite ends of the connecting beam being connected with the upper and lower edge beams respectively.

6. The concrete floor joint expansion joint support apparatus of claim 5, wherein, Further comprising: a plastic support rod, opposite ends of the plastic support rod being movably connected with the upper edge beams of the first and second support frames respectively.

7. The support device for the concrete ground terrace expansion joint according to claim 6, wherein: the plastic support rod comprises a main rod and a sleeve ring fixedly connected with opposite ends of the main rod, the sleeve ring being sleeved on the upper edge beam and being movably connected with the upper edge beam.

8. The support device for the concrete ground terrace expansion joint according to any one of claims 1-4, wherein: a heat-shrinkable film sleeve is sleeved on the surface of the pin plate.

9. The support device for the concrete ground terrace expansion joint according to any one of claims 1-4, wherein: a chamfer is arranged at a turning position of one end of the upper base of the pin plate.

10. The support device for expansion joints in concrete floors according to any of claims 1 to 4, characterized in that: the angle between the upper base of the pin plate and the waist ranges from 91 to 100°.

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