Hollow slab core mold

Abstract

The utility model provides a hollow slab core mold, which relates to the technical field of hollow slab manufacturing, is used for being arranged in a hollow hole of a net cage component of a hollow slab to be formed, and comprises a shell, a plurality of long-strip-shaped limiting holes, a plurality of limiting blocks and a plurality of limiting blocks, at least two connecting rods are arranged in each limiting hole in a penetrating mode, and the at least two connecting rods located in the same limiting hole are arranged at intervals in the axial direction of the shell; the first shaft is rotationally arranged in the shell, a spiral track groove is distributed in the first shaft, and one end of the connecting rod is movably connected into the spiral track groove; the multiple core templates are circumferentially distributed on the outer side of the shell, the other ends of the at least two connecting rods in each limiting hole are rotationally connected with one core template, and the multiple core templates can be unfolded in the direction away from the shell or folded in the direction close to the shell when the first shaft rotates; the hollow slab core mold is convenient to operate, low in cost and capable of being repeatedly used.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hollow core slab manufacturing technical field, more specifically, it relates to a hollow core slab core mould. BACKGROUND

[0002] The hollow core slab core mould is a kind of support mould for pouring concrete, mainly used for the manufacture of prefabricated concrete hollow core slab, it is placed in the hollow hole of the reinforcement mesh cage component of the hollow core slab to be formed, and it plays the role of supporting and forming hollow structure.

[0003] The hollow core slab core mould existing technology currently includes inflatable airbag core mould, hydraulic jack structure core mould and foam core mould, wherein the inflatable airbag core mould technology is now completely prohibited to use;The hydraulic jack structure core mould is higher in mechanical cost for small prefabricated hollow core slab, and has special requirements for the construction of prefabrication field;The foam core mould cannot be recycled, and its price is relatively high. UTILITY MODEL CONTENTS

[0004] The utility model aims at the technical deficiency of prior art, provides a kind of hollow core slab core mould, solve the problem of high cost and non-recyclable of the hollow core slab core mould in the background art.

[0005] In order to realize the above-mentioned purpose, the utility model provides a kind of hollow core slab core mould, for being arranged in the hollow hole of the mesh cage component of the hollow core slab to be formed, the hollow core slab core mould includes:

[0006] Shell, the outer wall of the shell is circumferentially distributed with a plurality of long strip-shaped limit holes;

[0007] A plurality of connecting rods, at least two connecting rods are arranged in each limit hole, and at least two connecting rods in the same limit hole are arranged along the axial direction of the shell;

[0008] First shaft, the first shaft is rotatably arranged in the shell, the first shaft is distributed with spiral track groove, and one end of the connecting rod is movably connected in the spiral track groove;

[0009] A plurality of core mould plates, a plurality of core mould plates are circumferentially distributed on the outer side of the shell, the other end of at least two connecting rods in each limit hole is rotatably connected with a core mould plate, and a plurality of core mould plates can be unfolded in the direction away from the shell or folded in the direction close to the shell when the first shaft rotates.

[0010] Preferably, the inside of the spiral track groove is provided with limit track groove, the hollow core slab core mould includes a plurality of balls, one end of each connecting rod is rotatably connected with a ball, and the ball is arranged in the spiral track groove and rolls between the two limit track grooves.

[0011] Preferably, the first shaft is provided with at least two first shaft bodies and at least two second shaft bodies, the diameter of the second shaft body is greater than that of the first shaft body, one second shaft body is arranged between every two first shaft bodies, a part of the core mold plates are first core mold plates, and another part of the core mold plates are second core mold plates, one end of the connecting rod on the first core mold plate is movably arranged in the spiral track groove on the first shaft body, one end of the connecting rod on the second core mold plate is movably arranged in the spiral track groove on the second shaft body, and one second core mold plate is arranged between every two first core mold plates.

[0012] Preferably, the hollow core mold further comprises a plurality of limiting rods, and at least two connecting rods in each limiting hole are rotationally connected with a limiting rod.

[0013] Preferably, the hollow core mold further comprises:

[0014] a second shaft, one end of the shell is provided with an opening, the second shaft penetrates through and is movably connected with the opening, and one end of the second shaft is connected with one end of the first shaft;

[0015] a locking mechanism, the locking mechanism is arranged at one end of the shell, and the locking mechanism can lock the second shaft;

[0016] a resilient mechanism, the resilient mechanism is arranged in the shell, and two ends of the resilient mechanism are respectively connected with the other end of the shell and the other end of the first shaft.

[0017] Preferably, the locking mechanism comprises:

[0018] a chuck, the chuck is connected with the second shaft, one end of the shell is provided with a clamping groove, and when a plurality of core mold plates are unfolded, the chuck is embedded in the clamping groove;

[0019] a plurality of limiting plates, the plurality of limiting plates are circumferentially distributed on the side of the clamping groove, the limiting plates are slidably connected at one end of the shell, the limiting plates can be slid to a position covering the clamping groove, and can be attached to one side of the chuck in the clamping groove.

[0020] Preferably, the resilient mechanism comprises:

[0021] a push plate, an edge of the push plate is slidably connected to the inner side of the shell, and one side of the push plate is connected with the other end of the first shaft;

[0022] a first spring and a second spring, the second spring is arranged inside the first spring, the first spring and the second spring are arranged in the shell and between the push plate and the other end of the shell.

[0023] Preferably, the first shaft is internally provided with a through hole, and one end of the second shaft is arranged in and connected with the through hole.

[0024] Preferably, the hollow slab core mold further comprises:

[0025] a top pin, one end of the top pin being connected with the other end of the shell, and the other end of the top pin being slidingly and rotatably connected in the through hole;

[0026] a third spring, the third spring being arranged in the through hole and between one end of the second shaft and the other end of the top pin.

[0027] Preferably, the hollow slab core mold further comprises support rods, a plurality of the support rods being circumferentially distributed on the side of the first shaft, and two ends of the support rods being respectively connected with the other end of the first shaft and one side of the push plate.

[0028] The hollow slab core mold has the following beneficial effects: at least two connecting rods are arranged in each limiting hole of the hollow slab core mold, one end of each connecting rod is movably connected in a spiral track groove, and the other end of each connecting rod is rotatably connected with a core mold plate; after the mesh cage component of the hollow slab is bound, the hollow slab core mold is arranged in the hollow hole of the mesh cage component, the first shaft is rotated clockwise, one end of the connecting rod moves along the axis of the first shaft with the rotation of the spiral track groove, the connecting rod is limited by the limiting hole, the core mold plates are unfolded away from the shell, and the core mold plates are unfolded completely; the core mold plates cover the inner side of the hollow hole, and the core mold plates are separated from the surface of the concrete, so that the concrete is prevented from entering the hollow hole, and the hollow slab is manufactured; after the concrete is poured and reaches the final setting, the first shaft is rotated counterclockwise, the core mold plates are folded towards the shell, and the core mold plates are separated from the surface of the concrete; after the core mold plates are folded completely, the hollow slab core mold can be taken out, the hollow slab core mold is convenient for the next hollow slab prefabrication and recycling, and the hollow slab core mold is simple in operation, low in cost and reusable.

[0029] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and wherein:

[0031] Figure 1 Fig. 1 shows a side view and sectional view structure schematic diagram of a hollow slab core mold according to an embodiment of the present application;

[0032] Figure 2 Fig. 1 shows a front view and sectional view structural schematic diagram of a hollow core mold according to an embodiment of the present application;

[0033] Figure 3 Fig. 3 shows a structural schematic diagram of a connecting rod and a ball when connected according to an embodiment of the present application.

[0034] Legend of reference signs:

[0035] 1, shell; 2, limiting hole; 3, connecting rod; 4, first shaft; 5, spiral track groove; 6, core mold plate; 61, edge mold plate; 62, corner mold plate; 7, ball; 8, limiting rod; 9, second shaft; 10, chuck; 11, limiting plate; 12, push plate; 13, first spring; 14, second spring; 15, thimble; 16, support rod. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.

[0037] As shown in Figure 1 and Figure 2 The present application provides a hollow core mold for being arranged in a hollow hole of a mesh cage component of a hollow core plate to be formed, which comprises:

[0038] A shell 1, the outer wall of the shell 1 is circumferentially distributed with a plurality of long strip-shaped limiting holes 2;

[0039] A plurality of connecting rods 3, at least two connecting rods 3 are arranged in each limiting hole 2, and the at least two connecting rods 3 in the same limiting hole 2 are arranged along the axial direction of the shell 1;

[0040] A first shaft 4, the first shaft 4 is rotationally arranged in the shell 1, the first shaft 4 is distributed with a spiral track groove 5, and one end of the connecting rod 3 is movably connected in the spiral track groove 5;

[0041] A plurality of core mold plates 6, the plurality of core mold plates 6 are circumferentially distributed on the outer side of the shell 1, the other end of the at least two connecting rods 3 in each limiting hole 2 is rotationally connected with one core mold plate 6, and the plurality of core mold plates 6 can be unfolded in the direction away from the shell 1 or folded in the direction close to the shell 1 when the first shaft 4 rotates.

[0042] Specifically, to solve the problem that the existing hollow core slab core mold has high cost and cannot be recycled, the utility model provides a hollow core slab core mold, a plurality of core mold plates 6 of the hollow core slab core mold can be unfolded or folded like an umbrella, at least two connecting rods 3 are arranged in each limiting hole 2 of the hollow core slab core mold, one end of the connecting rod 3 is movably connected in the spiral track groove 5, the other end of the at least two connecting rods 3 in each limiting hole 2 is rotatably connected with a core mold plate 6, when the net cage component of the hollow core slab is bound, the hollow core slab core mold is arranged in the hollow hole of the net cage component, the first shaft 4 is operated to rotate clockwise, one end of the connecting rod 3 will move along the axis of the first shaft 4 with the rotation of the spiral track groove 5, the connecting rod 3 is blocked by the inner end of the limiting hole 2 at this time, the angle of the included angle between the connecting rod 3 and the first shaft 4 becomes larger and larger, the plurality of core mold plates 6 will be unfolded in the direction away from the shell 1, until the plurality of core mold plates 6 are all unfolded, at this time, the plurality of core mold plates 6 will cover the inner side of the hollow hole, so that the concrete is prevented from entering the hollow hole when the concrete is poured, so as to realize the manufacturing of the hollow core slab, when the concrete pouring is completed and reaches the final setting, the first shaft 4 is operated to rotate counterclockwise, the connecting rod 3 is blocked by the other end of the limiting hole 2 at this time, the angle of the included angle between the connecting rod 3 and the first shaft 4 becomes smaller and smaller, the plurality of core mold plates 6 will be folded in the direction close to the shell 1, at this time, the plurality of core mold plates 6 will be separated from the surface of the concrete, after the plurality of core mold plates 6 are folded, the hollow core slab core mold can be taken out, so that the hollow core slab is conveniently recycled for the next time, the hollow core slab core mold is simple and convenient to operate, has low cost and can be recycled.

[0043] As shown in Figure 2 The number of the core mold plates 6 of the hollow core slab core mold is eight, four of which are edge mold plates 61 and the other four are corner mold plates 62, and they are distributed according to the orientation, that is, the east, west, south and north directions are the edge mold plates 61, and the southeast, southwest, northeast and northwest directions are the corner mold plates 62, the materials of the eight core mold plates 6 are all shaped steel mold plates, and they are independently moved and do not interfere with each other.

[0044] As shown in Figure 3 Preferably, the inside of the spiral track groove 5 is provided with limiting track grooves, the hollow core slab core mold comprises a plurality of balls 7, one end of each connecting rod 3 is rotatably connected with a ball 7, and the ball 7 is arranged in the spiral track groove 5 and rolls between the two limiting track grooves.

[0045] Specifically, the two limiting track grooves are used to prevent the ball 7 from coming out of the spiral track groove 5, and one end of the connecting rod 3 can move along the axis of the first shaft 4 with the rotation of the spiral track groove 5 through the ball 7.

[0046] Preferably, the first shaft 4 is formed with at least two first shaft bodies and at least two second shaft bodies, the diameter of the second shaft body is larger than that of the first shaft body, one second shaft body is arranged between every two first shaft bodies, part of the core mold plates 6 are first core mold plates, and the other part of the core mold plates 6 are second core mold plates, one end of the connecting rod 3 on the first core mold plate is movably arranged in the spiral track groove 5 on the first shaft body, one end of the connecting rod 3 on the second core mold plate is movably arranged in the spiral track groove 5 on the second shaft body, and one second core mold plate is arranged between every two first core mold plates.

[0047] Specifically, the first core mold plate is an edge mold plate 61, and the second core mold plate is an angle mold plate 62, wherein, in order to realize the differential movement working condition of fast collection and fast release of the angle mold plate 62 and slow collection and slow release of the edge mold plate 61, the first shaft 4 is designed to have first shaft bodies and second shaft bodies with different diameters, one end of the connecting rod 3 on the edge mold plate is movably arranged in the spiral track groove 5 on the first shaft body with a smaller diameter, and one end of the connecting rod 3 on the angle mold plate is movably arranged in the spiral track groove 5 on the second shaft body with a larger diameter.

[0048] When the first shaft 4 rotates, since the circumference of the second shaft body is longer than that of the first shaft body, when rotating by a certain angle, one end of the connecting rod 3 on the angle mold plate 62 moves a longer distance than one end of the connecting rod 3 on the edge mold plate 61, thereby realizing the differential movement working condition of fast collection and fast release of the angle mold plate 62 and slow collection and slow release of the edge mold plate 61, and the angle mold plate 62 and the edge mold plate 61 can avoid being restricted during collection and release.

[0049] Preferably, the hollow plate core mold further comprises a plurality of limiting rods 8, and at least two connecting rods 3 in each limiting hole 2 are movably connected with a limiting rod 8.

[0050] Specifically, the number of the connecting rods 3 in each limiting hole 2 is three, and in order to realize the stability of synchronous collection and release of the three connecting rods 3 in each limiting hole 2, one limiting rod 8 is movably connected with the three connecting rods 3 in each limiting hole 2.

[0051] Preferably, the hollow plate core mold further comprises:

[0052] a second shaft 9, one end of the shell 1 is provided with an opening, the second shaft 9 penetrates through the opening and is movably connected with the opening, and one end of the second shaft 9 is connected with one end of the first shaft 4;

[0053] a locking mechanism, the locking mechanism is arranged at one end of the shell 1, and the locking mechanism can lock the second shaft 9;

[0054] a resilient mechanism, the resilient mechanism is arranged in the shell 1, and two ends of the resilient mechanism are respectively connected with the other end of the shell 1 and the other end of the first shaft 4.

[0055] Specifically, when the cage member of the hollow slab is tied up, the shell 1 is arranged in the hollow hole of the cage member, the first shaft 4 is rotated clockwise, and the second shaft 9 is pushed towards the shell 1 at the same time. At this time, the plurality of core mold plates 6 are expanded away from the shell 1 under the action of the first shaft 4, and the elastic mechanism is compressed. Until the plurality of core mold plates 6 are fully expanded, the movement of the second shaft 9 can be locked by the locking mechanism to avoid the second shaft 9 being pushed out of the shell 1. At this time, the plurality of core mold plates 6 will cover the inside of the hollow hole, avoiding the concrete entering the hollow hole during the pouring of the concrete, so as to realize the manufacturing of the hollow slab. When the pouring of the concrete is completed and the final setting is reached, the elastic mechanism is released. Due to the elastic action of the elastic mechanism, the second shaft 9 will be pushed out of the shell 1 by a certain distance. At this time, the connecting rod 3 is impacted on the limiting hole, and the folding of the connecting rod 3 will drive the core mold plate 6 to be instantaneously folded. The instantaneous folding force will make the core mold plate 6 quickly separate from the surface of the concrete. At this time, the first shaft 4 can be operated to rotate counterclockwise to continue to fold the core mold plate 6. When the plurality of core mold plates 6 are fully folded, the hollow slab core mold can be taken out, which is convenient for the next hollow slab prefabrication cycle. The hollow slab core mold is simple to operate, low in cost and reusable.

[0056] Preferably, the locking mechanism comprises:

[0057] The chuck 10 is connected with the second shaft 9, and one end of the shell 1 is provided with a clamping groove. When the plurality of core mold plates 6 are expanded, the chuck 10 is embedded in the clamping groove.

[0058] The plurality of limiting plates 11 are circumferentially distributed on the side of the clamping groove, and the limiting plates 11 are slidingly connected to one end of the shell 1. The limiting plates 11 can be slid to cover the clamping groove and can be attached to one side of the chuck 10 in the clamping groove.

[0059] Specifically, when the plurality of core mold plates are fully expanded, the chuck 10 will be completely embedded in the clamping groove. At this time, the plurality of limiting plates 11 can be slid to press the limiting plates 11 on the chuck 10, so as to avoid the chuck 10 from being popped out of the clamping groove.

[0060] Preferably, the elastic mechanism comprises:

[0061] The push plate 12 is slidingly connected to the inside of the shell 1, and one side of the push plate 12 is connected with the other end of the first shaft 4.

[0062] The first spring 13 and the second spring 14 are arranged inside the first spring 13, and the first spring 14 and the second spring 13 are arranged in the shell 1 and between the push plate 12 and the other end of the shell 1.

[0063] Specifically, the first spring 13 is a ring-shaped high-strength spring, and the second spring 14 is a first-axle high-strength spring, which provides a certain strength of elastic force, so that the core mold plate 6 is more easily separated from the concrete surface and the separation efficiency is improved.

[0064] Preferably, the first axle 4 is internally provided with a through hole, and one end of the second axle 8 is arranged in and connected with the through hole.

[0065] Specifically, the through hole is used to realize the connection of the first axle 4 and the second axle 8.

[0066] Preferably, the hollow slab core mold further comprises:

[0067] The ejector pin 15 is connected at one end with the other end of the shell 1 and is slidingly and rotatably connected at the other end in the through hole;

[0068] The third spring 17 is arranged in the through hole and between one end of the second axle 9 and the other end of the ejector pin 15.

[0069] Specifically, the third spring 17 is a second-axle high-strength spring, which is used to generate a repulsive force with the ejector pin 15, so as to further improve the efficiency of the core mold plate 6 in separating from the concrete surface.

[0070] Preferably, the hollow slab core mold further comprises a plurality of support rods 16, which are circumferentially distributed on the side of the first axle 4, and the two ends of each support rod 16 are respectively connected with the other end of the first axle 4 and one side of the push plate 12.

[0071] Specifically, the support rod 16 is used to connect the push plate 12 and the first axle 4 together.

[0072] In summary, when the hollow slab core mold is implemented, after the reinforcement cage component of the hollow slab is bound, the hollow slab core mold is arranged in the hollow hole of the cage component, generally two hollow slab core molds are arranged in the hollow hole and simultaneously operated, when the core mold plate 6 is installed, the second axle 9 is rotated clockwise, and the second axle 9 is pushed into the shell 1 at the same time, the ball 7 on one end of the connecting rod 3 moves along the axis of the first axle 4 with the rotation of the spiral track groove 5, until all the eight core mold plates 6 are unfolded, at this time, the ejector pin 15 and the third spring 17 generate a repulsive force, the first spring 13 and the second spring 14 generate a mutual force with the first axle 4 as a whole, after the chuck 10 on the second axle 9 is completely embedded in the clamping groove, the limiting plate 11 is manually moved, so that the limiting plate 11 completely presses the chuck 10, at this time, the connecting rod 3 supports the core mold plate 6, and each spring completely interacts with the first axle 4 and the second axle 9, so as to realize the stability of the hollow slab core mold as a whole.

[0073] After the concrete pouring of the hollow slab is completed and reaches the final setting, the limiting plate 11 is manually released, at this time, due to the interaction force of each spring and the first shaft 4 and the second shaft 9, the core mold plate 6 will automatically separate from the concrete surface, by manually operating the first shaft 4 to rotate counterclockwise, eight core mold plates 6 are simultaneously retracted, after all or part of the core mold plates 6 are retracted, the hollow slab core mold can be pulled out, facilitating the next hollow slab prefabrication cycle.

[0074] The hollow slab core mold is a pure mechanical connection core mold, without the need of electricity and the use of a track, greatly reducing the construction mechanical cost.

[0075] The hollow slab core mold can be repeatedly used, with high energy saving and environmental protection level.

[0076] The hollow slab core mold is simple to operate, shortens the construction period and improves the construction efficiency.

[0077] The above has described the various embodiments of the utility model, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A core mold for a hollow core panel, which is arranged in a hollow hole of a lattice frame member of a hollow core panel to be formed, characterized by, The hollow slab core mold comprises: a shell, the outer wall of which is circumferentially provided with a plurality of long strip-shaped limiting holes; a plurality of connecting rods, at least two of which are arranged in each limiting hole and are arranged along the shell in an axial direction; a first shaft, which is rotatably arranged in the shell, is provided with a spiral track groove, and one end of the connecting rod is movably connected in the spiral track groove; a plurality of core mold plates, which are circumferentially arranged on the outside of the shell, the other end of at least two connecting rods in each limiting hole is rotatably connected with one core mold plate, and the plurality of core mold plates can be unfolded in a direction away from the shell or folded in a direction close to the shell when the first shaft rotates.

2. A core for a hollow core panel according to claim 1, wherein The inside of the spiral track groove is provided with limiting track grooves, the hollow slab core mold comprises a plurality of balls, one end of each connecting rod is rotatably connected with one ball, and the ball is arranged in the spiral track groove and rolls between the two limiting track grooves.

3. A core for a hollow core panel according to claim 1, wherein The first shaft is formed with at least two first shaft bodies and at least two second shaft bodies, the diameter of the second shaft body is greater than that of the first shaft body, one second shaft body is arranged between every two first shaft bodies, part of the plurality of core mold plates are first core mold plates, and the other part of the plurality of core mold plates are second core mold plates, one end of the connecting rod on the first core mold plate is movably arranged in the spiral track groove on the first shaft body, one end of the connecting rod on the second core mold plate is movably arranged in the spiral track groove on the second shaft body, and one second core mold plate is arranged between adjacent two first core mold plates.

4. A core for a hollow core panel according to claim 1, wherein The hollow slab core mold further comprises a plurality of limiting rods, and at least two connecting rods in each limiting hole are rotatably connected with one limiting rod.

5. A core for a hollow core panel according to claim 1, wherein The hollow slab core mold further comprises: a second shaft, one end of the shell is provided with an opening, the second shaft penetrates through the opening and is movably connected with the opening, and one end of the second shaft is connected with one end of the first shaft; a locking mechanism, which is arranged at one end of the shell, can lock the second shaft; a resilient mechanism, which is arranged in the shell, has two ends respectively connected with the other end of the shell and the other end of the first shaft.

6. A core for a hollow core panel according to claim 5, wherein The locking mechanism comprises: a chuck, which is connected with the second shaft, one end of the shell is provided with a clamping groove, and when the plurality of core mold plates are unfolded, the chuck is embedded in the clamping groove; a plurality of limiting plates, which are circumferentially arranged on the side of the clamping groove, are movably connected at one end of the shell, and can be slid to a position covering the clamping groove and can be attached to one side of the chuck in the clamping groove.

7. A core for a hollow core panel according to claim 5, wherein The resilient mechanism comprises: a push plate, the edge of which is movably connected to the inside of the shell, and one side of the push plate is connected with the other end of the first shaft; A first spring and a second spring, the second spring being arranged inside the first spring, the first spring and the second spring being arranged in the shell and between the push plate and the other end of the shell.

8. A core for a hollow core panel according to claim 5, wherein The first shaft is internally provided with a through hole, and one end of the second shaft is arranged in and connected with the through hole.

9. A core for a hollow core panel according to claim 8, wherein The hollow plate core mold further comprises: A thimble, one end of the thimble being connected with the other end of the shell, and the other end of the thimble being slidingly and rotatably connected in the through hole; A third spring, the third spring being arranged in the through hole and between one end of the second shaft and the other end of the thimble.

10. A core for a hollow core panel according to claim 7, wherein The hollow plate core mold further comprises support rods, a plurality of the support rods being circumferentially distributed on the side of the first shaft, and two ends of the support rods being respectively connected with the other end of the first shaft and one face of the push plate.

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